1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
47 static void target_info (char *, int);
49 static void kill_or_be_killed (int);
51 static void default_terminal_info (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 (CORE_ADDR
, int);
58 static int nosymbol (char *, CORE_ADDR
*);
60 static void tcomplain (void) ATTR_NORETURN
;
62 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
64 static int return_zero (void);
66 static int return_one (void);
68 static int return_minus_one (void);
70 void target_ignore (void);
72 static void target_command (char *, int);
74 static struct target_ops
*find_default_run_target (char *);
76 static void nosupport_runtime (void);
78 static LONGEST
default_xfer_partial (struct target_ops
*ops
,
79 enum target_object object
,
80 const char *annex
, gdb_byte
*readbuf
,
81 const gdb_byte
*writebuf
,
82 ULONGEST offset
, LONGEST len
);
84 static LONGEST
current_xfer_partial (struct target_ops
*ops
,
85 enum target_object object
,
86 const char *annex
, gdb_byte
*readbuf
,
87 const gdb_byte
*writebuf
,
88 ULONGEST offset
, LONGEST len
);
90 static LONGEST
target_xfer_partial (struct target_ops
*ops
,
91 enum target_object object
,
93 void *readbuf
, const void *writebuf
,
94 ULONGEST offset
, LONGEST len
);
96 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
99 static void init_dummy_target (void);
101 static struct target_ops debug_target
;
103 static void debug_to_open (char *, int);
105 static void debug_to_prepare_to_store (struct regcache
*);
107 static void debug_to_files_info (struct target_ops
*);
109 static int debug_to_insert_breakpoint (struct gdbarch
*,
110 struct bp_target_info
*);
112 static int debug_to_remove_breakpoint (struct gdbarch
*,
113 struct bp_target_info
*);
115 static int debug_to_can_use_hw_breakpoint (int, int, int);
117 static int debug_to_insert_hw_breakpoint (struct gdbarch
*,
118 struct bp_target_info
*);
120 static int debug_to_remove_hw_breakpoint (struct gdbarch
*,
121 struct bp_target_info
*);
123 static int debug_to_insert_watchpoint (CORE_ADDR
, int, int);
125 static int debug_to_remove_watchpoint (CORE_ADDR
, int, int);
127 static int debug_to_stopped_by_watchpoint (void);
129 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
131 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
132 CORE_ADDR
, CORE_ADDR
, int);
134 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
136 static void debug_to_terminal_init (void);
138 static void debug_to_terminal_inferior (void);
140 static void debug_to_terminal_ours_for_output (void);
142 static void debug_to_terminal_save_ours (void);
144 static void debug_to_terminal_ours (void);
146 static void debug_to_terminal_info (char *, int);
148 static void debug_to_load (char *, int);
150 static int debug_to_lookup_symbol (char *, CORE_ADDR
*);
152 static int debug_to_can_run (void);
154 static void debug_to_notice_signals (ptid_t
);
156 static void debug_to_stop (ptid_t
);
158 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
159 wierd and mysterious ways. Putting the variable here lets those
160 wierd and mysterious ways keep building while they are being
161 converted to the inferior inheritance structure. */
162 struct target_ops deprecated_child_ops
;
164 /* Pointer to array of target architecture structures; the size of the
165 array; the current index into the array; the allocated size of the
167 struct target_ops
**target_structs
;
168 unsigned target_struct_size
;
169 unsigned target_struct_index
;
170 unsigned target_struct_allocsize
;
171 #define DEFAULT_ALLOCSIZE 10
173 /* The initial current target, so that there is always a semi-valid
176 static struct target_ops dummy_target
;
178 /* Top of target stack. */
180 static struct target_ops
*target_stack
;
182 /* The target structure we are currently using to talk to a process
183 or file or whatever "inferior" we have. */
185 struct target_ops current_target
;
187 /* Command list for target. */
189 static struct cmd_list_element
*targetlist
= NULL
;
191 /* Nonzero if we should trust readonly sections from the
192 executable when reading memory. */
194 static int trust_readonly
= 0;
196 /* Nonzero if we should show true memory content including
197 memory breakpoint inserted by gdb. */
199 static int show_memory_breakpoints
= 0;
201 /* Non-zero if we want to see trace of target level stuff. */
203 static int targetdebug
= 0;
205 show_targetdebug (struct ui_file
*file
, int from_tty
,
206 struct cmd_list_element
*c
, const char *value
)
208 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
211 static void setup_target_debug (void);
213 /* The option sets this. */
214 static int stack_cache_enabled_p_1
= 1;
215 /* And set_stack_cache_enabled_p updates this.
216 The reason for the separation is so that we don't flush the cache for
217 on->on transitions. */
218 static int stack_cache_enabled_p
= 1;
220 /* This is called *after* the stack-cache has been set.
221 Flush the cache for off->on and on->off transitions.
222 There's no real need to flush the cache for on->off transitions,
223 except cleanliness. */
226 set_stack_cache_enabled_p (char *args
, int from_tty
,
227 struct cmd_list_element
*c
)
229 if (stack_cache_enabled_p
!= stack_cache_enabled_p_1
)
230 target_dcache_invalidate ();
232 stack_cache_enabled_p
= stack_cache_enabled_p_1
;
236 show_stack_cache_enabled_p (struct ui_file
*file
, int from_tty
,
237 struct cmd_list_element
*c
, const char *value
)
239 fprintf_filtered (file
, _("Cache use for stack accesses is %s.\n"), value
);
242 /* Cache of memory operations, to speed up remote access. */
243 static DCACHE
*target_dcache
;
245 /* Invalidate the target dcache. */
248 target_dcache_invalidate (void)
250 dcache_invalidate (target_dcache
);
253 /* The user just typed 'target' without the name of a target. */
256 target_command (char *arg
, int from_tty
)
258 fputs_filtered ("Argument required (target name). Try `help target'\n",
262 /* Default target_has_* methods for process_stratum targets. */
265 default_child_has_all_memory (struct target_ops
*ops
)
267 /* If no inferior selected, then we can't read memory here. */
268 if (ptid_equal (inferior_ptid
, null_ptid
))
275 default_child_has_memory (struct target_ops
*ops
)
277 /* If no inferior selected, then we can't read memory here. */
278 if (ptid_equal (inferior_ptid
, null_ptid
))
285 default_child_has_stack (struct target_ops
*ops
)
287 /* If no inferior selected, there's no stack. */
288 if (ptid_equal (inferior_ptid
, null_ptid
))
295 default_child_has_registers (struct target_ops
*ops
)
297 /* Can't read registers from no inferior. */
298 if (ptid_equal (inferior_ptid
, null_ptid
))
305 default_child_has_execution (struct target_ops
*ops
)
307 /* If there's no thread selected, then we can't make it run through
309 if (ptid_equal (inferior_ptid
, null_ptid
))
317 target_has_all_memory_1 (void)
319 struct target_ops
*t
;
321 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
322 if (t
->to_has_all_memory (t
))
329 target_has_memory_1 (void)
331 struct target_ops
*t
;
333 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
334 if (t
->to_has_memory (t
))
341 target_has_stack_1 (void)
343 struct target_ops
*t
;
345 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
346 if (t
->to_has_stack (t
))
353 target_has_registers_1 (void)
355 struct target_ops
*t
;
357 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
358 if (t
->to_has_registers (t
))
365 target_has_execution_1 (void)
367 struct target_ops
*t
;
369 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
370 if (t
->to_has_execution (t
))
376 /* Add a possible target architecture to the list. */
379 add_target (struct target_ops
*t
)
381 /* Provide default values for all "must have" methods. */
382 if (t
->to_xfer_partial
== NULL
)
383 t
->to_xfer_partial
= default_xfer_partial
;
385 if (t
->to_has_all_memory
== NULL
)
386 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
388 if (t
->to_has_memory
== NULL
)
389 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
391 if (t
->to_has_stack
== NULL
)
392 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
394 if (t
->to_has_registers
== NULL
)
395 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
397 if (t
->to_has_execution
== NULL
)
398 t
->to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
402 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
403 target_structs
= (struct target_ops
**) xmalloc
404 (target_struct_allocsize
* sizeof (*target_structs
));
406 if (target_struct_size
>= target_struct_allocsize
)
408 target_struct_allocsize
*= 2;
409 target_structs
= (struct target_ops
**)
410 xrealloc ((char *) target_structs
,
411 target_struct_allocsize
* sizeof (*target_structs
));
413 target_structs
[target_struct_size
++] = t
;
415 if (targetlist
== NULL
)
416 add_prefix_cmd ("target", class_run
, target_command
, _("\
417 Connect to a target machine or process.\n\
418 The first argument is the type or protocol of the target machine.\n\
419 Remaining arguments are interpreted by the target protocol. For more\n\
420 information on the arguments for a particular protocol, type\n\
421 `help target ' followed by the protocol name."),
422 &targetlist
, "target ", 0, &cmdlist
);
423 add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
436 struct target_ops
*t
;
438 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
439 if (t
->to_kill
!= NULL
)
442 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
452 target_load (char *arg
, int from_tty
)
454 target_dcache_invalidate ();
455 (*current_target
.to_load
) (arg
, from_tty
);
459 target_create_inferior (char *exec_file
, char *args
,
460 char **env
, int from_tty
)
462 struct target_ops
*t
;
463 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
465 if (t
->to_create_inferior
!= NULL
)
467 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
469 fprintf_unfiltered (gdb_stdlog
,
470 "target_create_inferior (%s, %s, xxx, %d)\n",
471 exec_file
, args
, from_tty
);
476 internal_error (__FILE__
, __LINE__
,
477 "could not find a target to create inferior");
481 target_terminal_inferior (void)
483 /* A background resume (``run&'') should leave GDB in control of the
485 if (target_is_async_p () && !sync_execution
)
488 /* If GDB is resuming the inferior in the foreground, install
489 inferior's terminal modes. */
490 (*current_target
.to_terminal_inferior
) ();
494 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
495 struct target_ops
*t
)
497 errno
= EIO
; /* Can't read/write this location */
498 return 0; /* No bytes handled */
504 error (_("You can't do that when your target is `%s'"),
505 current_target
.to_shortname
);
511 error (_("You can't do that without a process to debug."));
515 nosymbol (char *name
, CORE_ADDR
*addrp
)
517 return 1; /* Symbol does not exist in target env */
521 nosupport_runtime (void)
523 if (ptid_equal (inferior_ptid
, null_ptid
))
526 error (_("No run-time support for this"));
531 default_terminal_info (char *args
, int from_tty
)
533 printf_unfiltered (_("No saved terminal information.\n"));
536 /* This is the default target_create_inferior and target_attach function.
537 If the current target is executing, it asks whether to kill it off.
538 If this function returns without calling error(), it has killed off
539 the target, and the operation should be attempted. */
542 kill_or_be_killed (int from_tty
)
544 if (target_has_execution
)
546 printf_unfiltered (_("You are already running a program:\n"));
547 target_files_info ();
548 if (query (_("Kill it? ")))
551 if (target_has_execution
)
552 error (_("Killing the program did not help."));
557 error (_("Program not killed."));
563 /* A default implementation for the to_get_ada_task_ptid target method.
565 This function builds the PTID by using both LWP and TID as part of
566 the PTID lwp and tid elements. The pid used is the pid of the
570 default_get_ada_task_ptid (long lwp
, long tid
)
572 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
575 /* Go through the target stack from top to bottom, copying over zero
576 entries in current_target, then filling in still empty entries. In
577 effect, we are doing class inheritance through the pushed target
580 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
581 is currently implemented, is that it discards any knowledge of
582 which target an inherited method originally belonged to.
583 Consequently, new new target methods should instead explicitly and
584 locally search the target stack for the target that can handle the
588 update_current_target (void)
590 struct target_ops
*t
;
592 /* First, reset current's contents. */
593 memset (¤t_target
, 0, sizeof (current_target
));
595 #define INHERIT(FIELD, TARGET) \
596 if (!current_target.FIELD) \
597 current_target.FIELD = (TARGET)->FIELD
599 for (t
= target_stack
; t
; t
= t
->beneath
)
601 INHERIT (to_shortname
, t
);
602 INHERIT (to_longname
, t
);
604 /* Do not inherit to_open. */
605 /* Do not inherit to_close. */
606 /* Do not inherit to_attach. */
607 INHERIT (to_post_attach
, t
);
608 INHERIT (to_attach_no_wait
, t
);
609 /* Do not inherit to_detach. */
610 /* Do not inherit to_disconnect. */
611 /* Do not inherit to_resume. */
612 /* Do not inherit to_wait. */
613 /* Do not inherit to_fetch_registers. */
614 /* Do not inherit to_store_registers. */
615 INHERIT (to_prepare_to_store
, t
);
616 INHERIT (deprecated_xfer_memory
, t
);
617 INHERIT (to_files_info
, t
);
618 INHERIT (to_insert_breakpoint
, t
);
619 INHERIT (to_remove_breakpoint
, t
);
620 INHERIT (to_can_use_hw_breakpoint
, t
);
621 INHERIT (to_insert_hw_breakpoint
, t
);
622 INHERIT (to_remove_hw_breakpoint
, t
);
623 INHERIT (to_insert_watchpoint
, t
);
624 INHERIT (to_remove_watchpoint
, t
);
625 INHERIT (to_stopped_data_address
, t
);
626 INHERIT (to_have_steppable_watchpoint
, t
);
627 INHERIT (to_have_continuable_watchpoint
, t
);
628 INHERIT (to_stopped_by_watchpoint
, t
);
629 INHERIT (to_watchpoint_addr_within_range
, t
);
630 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
631 INHERIT (to_terminal_init
, t
);
632 INHERIT (to_terminal_inferior
, t
);
633 INHERIT (to_terminal_ours_for_output
, t
);
634 INHERIT (to_terminal_ours
, t
);
635 INHERIT (to_terminal_save_ours
, t
);
636 INHERIT (to_terminal_info
, t
);
637 /* Do not inherit to_kill. */
638 INHERIT (to_load
, t
);
639 INHERIT (to_lookup_symbol
, t
);
640 /* Do no inherit to_create_inferior. */
641 INHERIT (to_post_startup_inferior
, t
);
642 INHERIT (to_acknowledge_created_inferior
, t
);
643 INHERIT (to_insert_fork_catchpoint
, t
);
644 INHERIT (to_remove_fork_catchpoint
, t
);
645 INHERIT (to_insert_vfork_catchpoint
, t
);
646 INHERIT (to_remove_vfork_catchpoint
, t
);
647 /* Do not inherit to_follow_fork. */
648 INHERIT (to_insert_exec_catchpoint
, t
);
649 INHERIT (to_remove_exec_catchpoint
, t
);
650 INHERIT (to_has_exited
, t
);
651 /* Do not inherit to_mourn_inferiour. */
652 INHERIT (to_can_run
, t
);
653 INHERIT (to_notice_signals
, t
);
654 /* Do not inherit to_thread_alive. */
655 /* Do not inherit to_find_new_threads. */
656 /* Do not inherit to_pid_to_str. */
657 INHERIT (to_extra_thread_info
, t
);
658 INHERIT (to_stop
, t
);
659 /* Do not inherit to_xfer_partial. */
660 INHERIT (to_rcmd
, t
);
661 INHERIT (to_pid_to_exec_file
, t
);
662 INHERIT (to_log_command
, t
);
663 INHERIT (to_stratum
, t
);
664 /* Do not inherit to_has_all_memory */
665 /* Do not inherit to_has_memory */
666 /* Do not inherit to_has_stack */
667 /* Do not inherit to_has_registers */
668 /* Do not inherit to_has_execution */
669 INHERIT (to_has_thread_control
, t
);
670 INHERIT (to_can_async_p
, t
);
671 INHERIT (to_is_async_p
, t
);
672 INHERIT (to_async
, t
);
673 INHERIT (to_async_mask
, t
);
674 INHERIT (to_find_memory_regions
, t
);
675 INHERIT (to_make_corefile_notes
, t
);
676 /* Do not inherit to_get_thread_local_address. */
677 INHERIT (to_can_execute_reverse
, t
);
678 INHERIT (to_thread_architecture
, t
);
679 /* Do not inherit to_read_description. */
680 INHERIT (to_get_ada_task_ptid
, t
);
681 /* Do not inherit to_search_memory. */
682 INHERIT (to_supports_multi_process
, t
);
683 INHERIT (to_magic
, t
);
684 /* Do not inherit to_memory_map. */
685 /* Do not inherit to_flash_erase. */
686 /* Do not inherit to_flash_done. */
690 /* Clean up a target struct so it no longer has any zero pointers in
691 it. Some entries are defaulted to a method that print an error,
692 others are hard-wired to a standard recursive default. */
694 #define de_fault(field, value) \
695 if (!current_target.field) \
696 current_target.field = value
699 (void (*) (char *, int))
704 de_fault (to_post_attach
,
707 de_fault (to_prepare_to_store
,
708 (void (*) (struct regcache
*))
710 de_fault (deprecated_xfer_memory
,
711 (int (*) (CORE_ADDR
, gdb_byte
*, int, int, struct mem_attrib
*, struct target_ops
*))
713 de_fault (to_files_info
,
714 (void (*) (struct target_ops
*))
716 de_fault (to_insert_breakpoint
,
717 memory_insert_breakpoint
);
718 de_fault (to_remove_breakpoint
,
719 memory_remove_breakpoint
);
720 de_fault (to_can_use_hw_breakpoint
,
721 (int (*) (int, int, int))
723 de_fault (to_insert_hw_breakpoint
,
724 (int (*) (struct gdbarch
*, struct bp_target_info
*))
726 de_fault (to_remove_hw_breakpoint
,
727 (int (*) (struct gdbarch
*, struct bp_target_info
*))
729 de_fault (to_insert_watchpoint
,
730 (int (*) (CORE_ADDR
, int, int))
732 de_fault (to_remove_watchpoint
,
733 (int (*) (CORE_ADDR
, int, int))
735 de_fault (to_stopped_by_watchpoint
,
738 de_fault (to_stopped_data_address
,
739 (int (*) (struct target_ops
*, CORE_ADDR
*))
741 de_fault (to_watchpoint_addr_within_range
,
742 default_watchpoint_addr_within_range
);
743 de_fault (to_region_ok_for_hw_watchpoint
,
744 default_region_ok_for_hw_watchpoint
);
745 de_fault (to_terminal_init
,
748 de_fault (to_terminal_inferior
,
751 de_fault (to_terminal_ours_for_output
,
754 de_fault (to_terminal_ours
,
757 de_fault (to_terminal_save_ours
,
760 de_fault (to_terminal_info
,
761 default_terminal_info
);
763 (void (*) (char *, int))
765 de_fault (to_lookup_symbol
,
766 (int (*) (char *, CORE_ADDR
*))
768 de_fault (to_post_startup_inferior
,
771 de_fault (to_acknowledge_created_inferior
,
774 de_fault (to_insert_fork_catchpoint
,
777 de_fault (to_remove_fork_catchpoint
,
780 de_fault (to_insert_vfork_catchpoint
,
783 de_fault (to_remove_vfork_catchpoint
,
786 de_fault (to_insert_exec_catchpoint
,
789 de_fault (to_remove_exec_catchpoint
,
792 de_fault (to_has_exited
,
793 (int (*) (int, int, int *))
795 de_fault (to_can_run
,
797 de_fault (to_notice_signals
,
800 de_fault (to_extra_thread_info
,
801 (char *(*) (struct thread_info
*))
806 current_target
.to_xfer_partial
= current_xfer_partial
;
808 (void (*) (char *, struct ui_file
*))
810 de_fault (to_pid_to_exec_file
,
814 (void (*) (void (*) (enum inferior_event_type
, void*), void*))
816 de_fault (to_async_mask
,
819 de_fault (to_thread_architecture
,
820 default_thread_architecture
);
821 current_target
.to_read_description
= NULL
;
822 de_fault (to_get_ada_task_ptid
,
823 (ptid_t (*) (long, long))
824 default_get_ada_task_ptid
);
825 de_fault (to_supports_multi_process
,
830 /* Finally, position the target-stack beneath the squashed
831 "current_target". That way code looking for a non-inherited
832 target method can quickly and simply find it. */
833 current_target
.beneath
= target_stack
;
836 setup_target_debug ();
839 /* Push a new target type into the stack of the existing target accessors,
840 possibly superseding some of the existing accessors.
842 Result is zero if the pushed target ended up on top of the stack,
843 nonzero if at least one target is on top of it.
845 Rather than allow an empty stack, we always have the dummy target at
846 the bottom stratum, so we can call the function vectors without
850 push_target (struct target_ops
*t
)
852 struct target_ops
**cur
;
854 /* Check magic number. If wrong, it probably means someone changed
855 the struct definition, but not all the places that initialize one. */
856 if (t
->to_magic
!= OPS_MAGIC
)
858 fprintf_unfiltered (gdb_stderr
,
859 "Magic number of %s target struct wrong\n",
861 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
864 /* Find the proper stratum to install this target in. */
865 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
867 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
871 /* If there's already targets at this stratum, remove them. */
872 /* FIXME: cagney/2003-10-15: I think this should be popping all
873 targets to CUR, and not just those at this stratum level. */
874 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
876 /* There's already something at this stratum level. Close it,
877 and un-hook it from the stack. */
878 struct target_ops
*tmp
= (*cur
);
879 (*cur
) = (*cur
)->beneath
;
881 target_close (tmp
, 0);
884 /* We have removed all targets in our stratum, now add the new one. */
888 update_current_target ();
891 return (t
!= target_stack
);
894 /* Remove a target_ops vector from the stack, wherever it may be.
895 Return how many times it was removed (0 or 1). */
898 unpush_target (struct target_ops
*t
)
900 struct target_ops
**cur
;
901 struct target_ops
*tmp
;
903 if (t
->to_stratum
== dummy_stratum
)
904 internal_error (__FILE__
, __LINE__
,
905 "Attempt to unpush the dummy target");
907 /* Look for the specified target. Note that we assume that a target
908 can only occur once in the target stack. */
910 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
917 return 0; /* Didn't find target_ops, quit now */
919 /* NOTE: cagney/2003-12-06: In '94 the close call was made
920 unconditional by moving it to before the above check that the
921 target was in the target stack (something about "Change the way
922 pushing and popping of targets work to support target overlays
923 and inheritance"). This doesn't make much sense - only open
924 targets should be closed. */
927 /* Unchain the target */
929 (*cur
) = (*cur
)->beneath
;
932 update_current_target ();
940 target_close (target_stack
, 0); /* Let it clean up */
941 if (unpush_target (target_stack
) == 1)
944 fprintf_unfiltered (gdb_stderr
,
945 "pop_target couldn't find target %s\n",
946 current_target
.to_shortname
);
947 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
951 pop_all_targets_above (enum strata above_stratum
, int quitting
)
953 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
955 target_close (target_stack
, quitting
);
956 if (!unpush_target (target_stack
))
958 fprintf_unfiltered (gdb_stderr
,
959 "pop_all_targets couldn't find target %s\n",
960 target_stack
->to_shortname
);
961 internal_error (__FILE__
, __LINE__
,
962 _("failed internal consistency check"));
969 pop_all_targets (int quitting
)
971 pop_all_targets_above (dummy_stratum
, quitting
);
974 /* Using the objfile specified in OBJFILE, find the address for the
975 current thread's thread-local storage with offset OFFSET. */
977 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
979 volatile CORE_ADDR addr
= 0;
980 struct target_ops
*target
;
982 for (target
= current_target
.beneath
;
984 target
= target
->beneath
)
986 if (target
->to_get_thread_local_address
!= NULL
)
991 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch
))
993 ptid_t ptid
= inferior_ptid
;
994 volatile struct gdb_exception ex
;
996 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1000 /* Fetch the load module address for this objfile. */
1001 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch
,
1003 /* If it's 0, throw the appropriate exception. */
1005 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1006 _("TLS load module not found"));
1008 addr
= target
->to_get_thread_local_address (target
, ptid
, lm_addr
, offset
);
1010 /* If an error occurred, print TLS related messages here. Otherwise,
1011 throw the error to some higher catcher. */
1014 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1018 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1019 error (_("Cannot find thread-local variables in this thread library."));
1021 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1022 if (objfile_is_library
)
1023 error (_("Cannot find shared library `%s' in dynamic"
1024 " linker's load module list"), objfile
->name
);
1026 error (_("Cannot find executable file `%s' in dynamic"
1027 " linker's load module list"), objfile
->name
);
1029 case TLS_NOT_ALLOCATED_YET_ERROR
:
1030 if (objfile_is_library
)
1031 error (_("The inferior has not yet allocated storage for"
1032 " thread-local variables in\n"
1033 "the shared library `%s'\n"
1035 objfile
->name
, target_pid_to_str (ptid
));
1037 error (_("The inferior has not yet allocated storage for"
1038 " thread-local variables in\n"
1039 "the executable `%s'\n"
1041 objfile
->name
, target_pid_to_str (ptid
));
1043 case TLS_GENERIC_ERROR
:
1044 if (objfile_is_library
)
1045 error (_("Cannot find thread-local storage for %s, "
1046 "shared library %s:\n%s"),
1047 target_pid_to_str (ptid
),
1048 objfile
->name
, ex
.message
);
1050 error (_("Cannot find thread-local storage for %s, "
1051 "executable file %s:\n%s"),
1052 target_pid_to_str (ptid
),
1053 objfile
->name
, ex
.message
);
1056 throw_exception (ex
);
1061 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1062 TLS is an ABI-specific thing. But we don't do that yet. */
1064 error (_("Cannot find thread-local variables on this target"));
1070 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1072 /* target_read_string -- read a null terminated string, up to LEN bytes,
1073 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1074 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1075 is responsible for freeing it. Return the number of bytes successfully
1079 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1081 int tlen
, origlen
, offset
, i
;
1085 int buffer_allocated
;
1087 unsigned int nbytes_read
= 0;
1089 gdb_assert (string
);
1091 /* Small for testing. */
1092 buffer_allocated
= 4;
1093 buffer
= xmalloc (buffer_allocated
);
1100 tlen
= MIN (len
, 4 - (memaddr
& 3));
1101 offset
= memaddr
& 3;
1103 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1106 /* The transfer request might have crossed the boundary to an
1107 unallocated region of memory. Retry the transfer, requesting
1111 errcode
= target_read_memory (memaddr
, buf
, 1);
1116 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1119 bytes
= bufptr
- buffer
;
1120 buffer_allocated
*= 2;
1121 buffer
= xrealloc (buffer
, buffer_allocated
);
1122 bufptr
= buffer
+ bytes
;
1125 for (i
= 0; i
< tlen
; i
++)
1127 *bufptr
++ = buf
[i
+ offset
];
1128 if (buf
[i
+ offset
] == '\000')
1130 nbytes_read
+= i
+ 1;
1137 nbytes_read
+= tlen
;
1146 struct target_section_table
*
1147 target_get_section_table (struct target_ops
*target
)
1149 struct target_ops
*t
;
1152 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1154 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1155 if (t
->to_get_section_table
!= NULL
)
1156 return (*t
->to_get_section_table
) (t
);
1161 /* Find a section containing ADDR. */
1163 struct target_section
*
1164 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1166 struct target_section_table
*table
= target_get_section_table (target
);
1167 struct target_section
*secp
;
1172 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1174 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1180 /* Perform a partial memory transfer. The arguments and return
1181 value are just as for target_xfer_partial. */
1184 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1185 void *readbuf
, const void *writebuf
, ULONGEST memaddr
,
1190 struct mem_region
*region
;
1191 struct inferior
*inf
;
1193 /* Zero length requests are ok and require no work. */
1197 /* For accesses to unmapped overlay sections, read directly from
1198 files. Must do this first, as MEMADDR may need adjustment. */
1199 if (readbuf
!= NULL
&& overlay_debugging
)
1201 struct obj_section
*section
= find_pc_overlay (memaddr
);
1202 if (pc_in_unmapped_range (memaddr
, section
))
1204 struct target_section_table
*table
1205 = target_get_section_table (ops
);
1206 const char *section_name
= section
->the_bfd_section
->name
;
1207 memaddr
= overlay_mapped_address (memaddr
, section
);
1208 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1211 table
->sections_end
,
1216 /* Try the executable files, if "trust-readonly-sections" is set. */
1217 if (readbuf
!= NULL
&& trust_readonly
)
1219 struct target_section
*secp
;
1220 struct target_section_table
*table
;
1222 secp
= target_section_by_addr (ops
, memaddr
);
1224 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1227 table
= target_get_section_table (ops
);
1228 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1231 table
->sections_end
,
1236 /* Try GDB's internal data cache. */
1237 region
= lookup_mem_region (memaddr
);
1238 /* region->hi == 0 means there's no upper bound. */
1239 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1242 reg_len
= region
->hi
- memaddr
;
1244 switch (region
->attrib
.mode
)
1247 if (writebuf
!= NULL
)
1252 if (readbuf
!= NULL
)
1257 /* We only support writing to flash during "load" for now. */
1258 if (writebuf
!= NULL
)
1259 error (_("Writing to flash memory forbidden in this context"));
1266 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1269 && (region
->attrib
.cache
1270 || (stack_cache_enabled_p
&& object
== TARGET_OBJECT_STACK_MEMORY
)))
1272 if (readbuf
!= NULL
)
1273 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
, readbuf
,
1276 /* FIXME drow/2006-08-09: If we're going to preserve const
1277 correctness dcache_xfer_memory should take readbuf and
1279 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
,
1286 if (readbuf
&& !show_memory_breakpoints
)
1287 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1292 /* If none of those methods found the memory we wanted, fall back
1293 to a target partial transfer. Normally a single call to
1294 to_xfer_partial is enough; if it doesn't recognize an object
1295 it will call the to_xfer_partial of the next target down.
1296 But for memory this won't do. Memory is the only target
1297 object which can be read from more than one valid target.
1298 A core file, for instance, could have some of memory but
1299 delegate other bits to the target below it. So, we must
1300 manually try all targets. */
1304 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1305 readbuf
, writebuf
, memaddr
, reg_len
);
1309 /* We want to continue past core files to executables, but not
1310 past a running target's memory. */
1311 if (ops
->to_has_all_memory (ops
))
1316 while (ops
!= NULL
);
1318 if (readbuf
&& !show_memory_breakpoints
)
1319 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1321 /* Make sure the cache gets updated no matter what - if we are writing
1322 to the stack. Even if this write is not tagged as such, we still need
1323 to update the cache. */
1328 && !region
->attrib
.cache
1329 && stack_cache_enabled_p
1330 && object
!= TARGET_OBJECT_STACK_MEMORY
)
1332 dcache_update (target_dcache
, memaddr
, (void *) writebuf
, reg_len
);
1335 /* If we still haven't got anything, return the last error. We
1341 restore_show_memory_breakpoints (void *arg
)
1343 show_memory_breakpoints
= (uintptr_t) arg
;
1347 make_show_memory_breakpoints_cleanup (int show
)
1349 int current
= show_memory_breakpoints
;
1350 show_memory_breakpoints
= show
;
1352 return make_cleanup (restore_show_memory_breakpoints
,
1353 (void *) (uintptr_t) current
);
1357 target_xfer_partial (struct target_ops
*ops
,
1358 enum target_object object
, const char *annex
,
1359 void *readbuf
, const void *writebuf
,
1360 ULONGEST offset
, LONGEST len
)
1364 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1366 /* If this is a memory transfer, let the memory-specific code
1367 have a look at it instead. Memory transfers are more
1369 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
)
1370 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1371 writebuf
, offset
, len
);
1374 enum target_object raw_object
= object
;
1376 /* If this is a raw memory transfer, request the normal
1377 memory object from other layers. */
1378 if (raw_object
== TARGET_OBJECT_RAW_MEMORY
)
1379 raw_object
= TARGET_OBJECT_MEMORY
;
1381 retval
= ops
->to_xfer_partial (ops
, raw_object
, annex
, readbuf
,
1382 writebuf
, offset
, len
);
1387 const unsigned char *myaddr
= NULL
;
1389 fprintf_unfiltered (gdb_stdlog
,
1390 "%s:target_xfer_partial (%d, %s, %s, %s, %s, %s) = %s",
1393 (annex
? annex
: "(null)"),
1394 host_address_to_string (readbuf
),
1395 host_address_to_string (writebuf
),
1396 core_addr_to_string_nz (offset
),
1397 plongest (len
), plongest (retval
));
1403 if (retval
> 0 && myaddr
!= NULL
)
1407 fputs_unfiltered (", bytes =", gdb_stdlog
);
1408 for (i
= 0; i
< retval
; i
++)
1410 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1412 if (targetdebug
< 2 && i
> 0)
1414 fprintf_unfiltered (gdb_stdlog
, " ...");
1417 fprintf_unfiltered (gdb_stdlog
, "\n");
1420 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1424 fputc_unfiltered ('\n', gdb_stdlog
);
1429 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1430 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1431 if any error occurs.
1433 If an error occurs, no guarantee is made about the contents of the data at
1434 MYADDR. In particular, the caller should not depend upon partial reads
1435 filling the buffer with good data. There is no way for the caller to know
1436 how much good data might have been transfered anyway. Callers that can
1437 deal with partial reads should call target_read (which will retry until
1438 it makes no progress, and then return how much was transferred). */
1441 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1443 /* Dispatch to the topmost target, not the flattened current_target.
1444 Memory accesses check target->to_has_(all_)memory, and the
1445 flattened target doesn't inherit those. */
1446 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1447 myaddr
, memaddr
, len
) == len
)
1453 /* Like target_read_memory, but specify explicitly that this is a read from
1454 the target's stack. This may trigger different cache behavior. */
1457 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1459 /* Dispatch to the topmost target, not the flattened current_target.
1460 Memory accesses check target->to_has_(all_)memory, and the
1461 flattened target doesn't inherit those. */
1463 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1464 myaddr
, memaddr
, len
) == len
)
1471 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
1473 /* Dispatch to the topmost target, not the flattened current_target.
1474 Memory accesses check target->to_has_(all_)memory, and the
1475 flattened target doesn't inherit those. */
1476 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1477 myaddr
, memaddr
, len
) == len
)
1483 /* Fetch the target's memory map. */
1486 target_memory_map (void)
1488 VEC(mem_region_s
) *result
;
1489 struct mem_region
*last_one
, *this_one
;
1491 struct target_ops
*t
;
1494 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1496 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1497 if (t
->to_memory_map
!= NULL
)
1503 result
= t
->to_memory_map (t
);
1507 qsort (VEC_address (mem_region_s
, result
),
1508 VEC_length (mem_region_s
, result
),
1509 sizeof (struct mem_region
), mem_region_cmp
);
1511 /* Check that regions do not overlap. Simultaneously assign
1512 a numbering for the "mem" commands to use to refer to
1515 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1517 this_one
->number
= ix
;
1519 if (last_one
&& last_one
->hi
> this_one
->lo
)
1521 warning (_("Overlapping regions in memory map: ignoring"));
1522 VEC_free (mem_region_s
, result
);
1525 last_one
= this_one
;
1532 target_flash_erase (ULONGEST address
, LONGEST length
)
1534 struct target_ops
*t
;
1536 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1537 if (t
->to_flash_erase
!= NULL
)
1540 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1541 hex_string (address
), phex (length
, 0));
1542 t
->to_flash_erase (t
, address
, length
);
1550 target_flash_done (void)
1552 struct target_ops
*t
;
1554 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1555 if (t
->to_flash_done
!= NULL
)
1558 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1559 t
->to_flash_done (t
);
1567 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1568 struct cmd_list_element
*c
, const char *value
)
1570 fprintf_filtered (file
, _("\
1571 Mode for reading from readonly sections is %s.\n"),
1575 /* More generic transfers. */
1578 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1579 const char *annex
, gdb_byte
*readbuf
,
1580 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1582 if (object
== TARGET_OBJECT_MEMORY
1583 && ops
->deprecated_xfer_memory
!= NULL
)
1584 /* If available, fall back to the target's
1585 "deprecated_xfer_memory" method. */
1589 if (writebuf
!= NULL
)
1591 void *buffer
= xmalloc (len
);
1592 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1593 memcpy (buffer
, writebuf
, len
);
1594 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1595 1/*write*/, NULL
, ops
);
1596 do_cleanups (cleanup
);
1598 if (readbuf
!= NULL
)
1599 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1600 0/*read*/, NULL
, ops
);
1603 else if (xfered
== 0 && errno
== 0)
1604 /* "deprecated_xfer_memory" uses 0, cross checked against
1605 ERRNO as one indication of an error. */
1610 else if (ops
->beneath
!= NULL
)
1611 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1612 readbuf
, writebuf
, offset
, len
);
1617 /* The xfer_partial handler for the topmost target. Unlike the default,
1618 it does not need to handle memory specially; it just passes all
1619 requests down the stack. */
1622 current_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1623 const char *annex
, gdb_byte
*readbuf
,
1624 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1626 if (ops
->beneath
!= NULL
)
1627 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1628 readbuf
, writebuf
, offset
, len
);
1633 /* Target vector read/write partial wrapper functions.
1635 NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial
1636 (inbuf, outbuf)", instead of separate read/write methods, make life
1640 target_read_partial (struct target_ops
*ops
,
1641 enum target_object object
,
1642 const char *annex
, gdb_byte
*buf
,
1643 ULONGEST offset
, LONGEST len
)
1645 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
);
1649 target_write_partial (struct target_ops
*ops
,
1650 enum target_object object
,
1651 const char *annex
, const gdb_byte
*buf
,
1652 ULONGEST offset
, LONGEST len
)
1654 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
);
1657 /* Wrappers to perform the full transfer. */
1659 target_read (struct target_ops
*ops
,
1660 enum target_object object
,
1661 const char *annex
, gdb_byte
*buf
,
1662 ULONGEST offset
, LONGEST len
)
1665 while (xfered
< len
)
1667 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1668 (gdb_byte
*) buf
+ xfered
,
1669 offset
+ xfered
, len
- xfered
);
1670 /* Call an observer, notifying them of the xfer progress? */
1682 target_read_until_error (struct target_ops
*ops
,
1683 enum target_object object
,
1684 const char *annex
, gdb_byte
*buf
,
1685 ULONGEST offset
, LONGEST len
)
1688 while (xfered
< len
)
1690 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1691 (gdb_byte
*) buf
+ xfered
,
1692 offset
+ xfered
, len
- xfered
);
1693 /* Call an observer, notifying them of the xfer progress? */
1698 /* We've got an error. Try to read in smaller blocks. */
1699 ULONGEST start
= offset
+ xfered
;
1700 ULONGEST remaining
= len
- xfered
;
1703 /* If an attempt was made to read a random memory address,
1704 it's likely that the very first byte is not accessible.
1705 Try reading the first byte, to avoid doing log N tries
1707 xfer
= target_read_partial (ops
, object
, annex
,
1708 (gdb_byte
*) buf
+ xfered
, start
, 1);
1717 xfer
= target_read_partial (ops
, object
, annex
,
1718 (gdb_byte
*) buf
+ xfered
,
1728 /* We have successfully read the first half. So, the
1729 error must be in the second half. Adjust start and
1730 remaining to point at the second half. */
1747 /* An alternative to target_write with progress callbacks. */
1750 target_write_with_progress (struct target_ops
*ops
,
1751 enum target_object object
,
1752 const char *annex
, const gdb_byte
*buf
,
1753 ULONGEST offset
, LONGEST len
,
1754 void (*progress
) (ULONGEST
, void *), void *baton
)
1758 /* Give the progress callback a chance to set up. */
1760 (*progress
) (0, baton
);
1762 while (xfered
< len
)
1764 LONGEST xfer
= target_write_partial (ops
, object
, annex
,
1765 (gdb_byte
*) buf
+ xfered
,
1766 offset
+ xfered
, len
- xfered
);
1774 (*progress
) (xfer
, baton
);
1783 target_write (struct target_ops
*ops
,
1784 enum target_object object
,
1785 const char *annex
, const gdb_byte
*buf
,
1786 ULONGEST offset
, LONGEST len
)
1788 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1792 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1793 the size of the transferred data. PADDING additional bytes are
1794 available in *BUF_P. This is a helper function for
1795 target_read_alloc; see the declaration of that function for more
1799 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1800 const char *annex
, gdb_byte
**buf_p
, int padding
)
1802 size_t buf_alloc
, buf_pos
;
1806 /* This function does not have a length parameter; it reads the
1807 entire OBJECT). Also, it doesn't support objects fetched partly
1808 from one target and partly from another (in a different stratum,
1809 e.g. a core file and an executable). Both reasons make it
1810 unsuitable for reading memory. */
1811 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1813 /* Start by reading up to 4K at a time. The target will throttle
1814 this number down if necessary. */
1816 buf
= xmalloc (buf_alloc
);
1820 n
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1821 buf_pos
, buf_alloc
- buf_pos
- padding
);
1824 /* An error occurred. */
1830 /* Read all there was. */
1840 /* If the buffer is filling up, expand it. */
1841 if (buf_alloc
< buf_pos
* 2)
1844 buf
= xrealloc (buf
, buf_alloc
);
1851 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1852 the size of the transferred data. See the declaration in "target.h"
1853 function for more information about the return value. */
1856 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1857 const char *annex
, gdb_byte
**buf_p
)
1859 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1862 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1863 returned as a string, allocated using xmalloc. If an error occurs
1864 or the transfer is unsupported, NULL is returned. Empty objects
1865 are returned as allocated but empty strings. A warning is issued
1866 if the result contains any embedded NUL bytes. */
1869 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1873 LONGEST transferred
;
1875 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1877 if (transferred
< 0)
1880 if (transferred
== 0)
1881 return xstrdup ("");
1883 buffer
[transferred
] = 0;
1884 if (strlen (buffer
) < transferred
)
1885 warning (_("target object %d, annex %s, "
1886 "contained unexpected null characters"),
1887 (int) object
, annex
? annex
: "(none)");
1889 return (char *) buffer
;
1892 /* Memory transfer methods. */
1895 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1898 /* This method is used to read from an alternate, non-current
1899 target. This read must bypass the overlay support (as symbols
1900 don't match this target), and GDB's internal cache (wrong cache
1901 for this target). */
1902 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1904 memory_error (EIO
, addr
);
1908 get_target_memory_unsigned (struct target_ops
*ops
,
1909 CORE_ADDR addr
, int len
, enum bfd_endian byte_order
)
1911 gdb_byte buf
[sizeof (ULONGEST
)];
1913 gdb_assert (len
<= sizeof (buf
));
1914 get_target_memory (ops
, addr
, buf
, len
);
1915 return extract_unsigned_integer (buf
, len
, byte_order
);
1919 target_info (char *args
, int from_tty
)
1921 struct target_ops
*t
;
1922 int has_all_mem
= 0;
1924 if (symfile_objfile
!= NULL
)
1925 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile
->name
);
1927 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1929 if (!(*t
->to_has_memory
) (t
))
1932 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1935 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n"));
1936 printf_unfiltered ("%s:\n", t
->to_longname
);
1937 (t
->to_files_info
) (t
);
1938 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1942 /* This function is called before any new inferior is created, e.g.
1943 by running a program, attaching, or connecting to a target.
1944 It cleans up any state from previous invocations which might
1945 change between runs. This is a subset of what target_preopen
1946 resets (things which might change between targets). */
1949 target_pre_inferior (int from_tty
)
1951 /* Clear out solib state. Otherwise the solib state of the previous
1952 inferior might have survived and is entirely wrong for the new
1953 target. This has been observed on GNU/Linux using glibc 2.3. How
1965 Cannot access memory at address 0xdeadbeef
1968 /* In some OSs, the shared library list is the same/global/shared
1969 across inferiors. If code is shared between processes, so are
1970 memory regions and features. */
1971 if (!gdbarch_has_global_solist (target_gdbarch
))
1973 no_shared_libraries (NULL
, from_tty
);
1975 invalidate_target_mem_regions ();
1977 target_clear_description ();
1981 /* Callback for iterate_over_inferiors. Gets rid of the given
1985 dispose_inferior (struct inferior
*inf
, void *args
)
1987 struct thread_info
*thread
;
1989 thread
= any_thread_of_process (inf
->pid
);
1992 switch_to_thread (thread
->ptid
);
1994 /* Core inferiors actually should be detached, not killed. */
1995 if (target_has_execution
)
1998 target_detach (NULL
, 0);
2004 /* This is to be called by the open routine before it does
2008 target_preopen (int from_tty
)
2012 if (have_inferiors ())
2015 || !have_live_inferiors ()
2016 || query (_("A program is being debugged already. Kill it? ")))
2017 iterate_over_inferiors (dispose_inferior
, NULL
);
2019 error (_("Program not killed."));
2022 /* Calling target_kill may remove the target from the stack. But if
2023 it doesn't (which seems like a win for UDI), remove it now. */
2024 /* Leave the exec target, though. The user may be switching from a
2025 live process to a core of the same program. */
2026 pop_all_targets_above (file_stratum
, 0);
2028 target_pre_inferior (from_tty
);
2031 /* Detach a target after doing deferred register stores. */
2034 target_detach (char *args
, int from_tty
)
2036 struct target_ops
* t
;
2038 if (gdbarch_has_global_breakpoints (target_gdbarch
))
2039 /* Don't remove global breakpoints here. They're removed on
2040 disconnection from the target. */
2043 /* If we're in breakpoints-always-inserted mode, have to remove
2044 them before detaching. */
2045 remove_breakpoints ();
2047 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2049 if (t
->to_detach
!= NULL
)
2051 t
->to_detach (t
, args
, from_tty
);
2053 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2059 internal_error (__FILE__
, __LINE__
, "could not find a target to detach");
2063 target_disconnect (char *args
, int from_tty
)
2065 struct target_ops
*t
;
2067 /* If we're in breakpoints-always-inserted mode or if breakpoints
2068 are global across processes, we have to remove them before
2070 remove_breakpoints ();
2072 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2073 if (t
->to_disconnect
!= NULL
)
2076 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2078 t
->to_disconnect (t
, args
, from_tty
);
2086 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2088 struct target_ops
*t
;
2090 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2092 if (t
->to_wait
!= NULL
)
2094 ptid_t retval
= (*t
->to_wait
) (t
, ptid
, status
, options
);
2098 char *status_string
;
2100 status_string
= target_waitstatus_to_string (status
);
2101 fprintf_unfiltered (gdb_stdlog
,
2102 "target_wait (%d, status) = %d, %s\n",
2103 PIDGET (ptid
), PIDGET (retval
),
2105 xfree (status_string
);
2116 target_pid_to_str (ptid_t ptid
)
2118 struct target_ops
*t
;
2120 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2122 if (t
->to_pid_to_str
!= NULL
)
2123 return (*t
->to_pid_to_str
) (t
, ptid
);
2126 return normal_pid_to_str (ptid
);
2130 target_resume (ptid_t ptid
, int step
, enum target_signal signal
)
2132 struct target_ops
*t
;
2134 target_dcache_invalidate ();
2136 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2138 if (t
->to_resume
!= NULL
)
2140 t
->to_resume (t
, ptid
, step
, signal
);
2142 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2144 step
? "step" : "continue",
2145 target_signal_to_name (signal
));
2147 set_executing (ptid
, 1);
2148 set_running (ptid
, 1);
2149 clear_inline_frame_state (ptid
);
2156 /* Look through the list of possible targets for a target that can
2160 target_follow_fork (int follow_child
)
2162 struct target_ops
*t
;
2164 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2166 if (t
->to_follow_fork
!= NULL
)
2168 int retval
= t
->to_follow_fork (t
, follow_child
);
2170 fprintf_unfiltered (gdb_stdlog
, "target_follow_fork (%d) = %d\n",
2171 follow_child
, retval
);
2176 /* Some target returned a fork event, but did not know how to follow it. */
2177 internal_error (__FILE__
, __LINE__
,
2178 "could not find a target to follow fork");
2182 target_mourn_inferior (void)
2184 struct target_ops
*t
;
2185 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2187 if (t
->to_mourn_inferior
!= NULL
)
2189 t
->to_mourn_inferior (t
);
2191 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2193 /* We no longer need to keep handles on any of the object files.
2194 Make sure to release them to avoid unnecessarily locking any
2195 of them while we're not actually debugging. */
2196 bfd_cache_close_all ();
2202 internal_error (__FILE__
, __LINE__
,
2203 "could not find a target to follow mourn inferiour");
2206 /* Look for a target which can describe architectural features, starting
2207 from TARGET. If we find one, return its description. */
2209 const struct target_desc
*
2210 target_read_description (struct target_ops
*target
)
2212 struct target_ops
*t
;
2214 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2215 if (t
->to_read_description
!= NULL
)
2217 const struct target_desc
*tdesc
;
2219 tdesc
= t
->to_read_description (t
);
2227 /* The default implementation of to_search_memory.
2228 This implements a basic search of memory, reading target memory and
2229 performing the search here (as opposed to performing the search in on the
2230 target side with, for example, gdbserver). */
2233 simple_search_memory (struct target_ops
*ops
,
2234 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2235 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2236 CORE_ADDR
*found_addrp
)
2238 /* NOTE: also defined in find.c testcase. */
2239 #define SEARCH_CHUNK_SIZE 16000
2240 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2241 /* Buffer to hold memory contents for searching. */
2242 gdb_byte
*search_buf
;
2243 unsigned search_buf_size
;
2244 struct cleanup
*old_cleanups
;
2246 search_buf_size
= chunk_size
+ pattern_len
- 1;
2248 /* No point in trying to allocate a buffer larger than the search space. */
2249 if (search_space_len
< search_buf_size
)
2250 search_buf_size
= search_space_len
;
2252 search_buf
= malloc (search_buf_size
);
2253 if (search_buf
== NULL
)
2254 error (_("Unable to allocate memory to perform the search."));
2255 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2257 /* Prime the search buffer. */
2259 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2260 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2262 warning (_("Unable to access target memory at %s, halting search."),
2263 hex_string (start_addr
));
2264 do_cleanups (old_cleanups
);
2268 /* Perform the search.
2270 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2271 When we've scanned N bytes we copy the trailing bytes to the start and
2272 read in another N bytes. */
2274 while (search_space_len
>= pattern_len
)
2276 gdb_byte
*found_ptr
;
2277 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2279 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2280 pattern
, pattern_len
);
2282 if (found_ptr
!= NULL
)
2284 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2285 *found_addrp
= found_addr
;
2286 do_cleanups (old_cleanups
);
2290 /* Not found in this chunk, skip to next chunk. */
2292 /* Don't let search_space_len wrap here, it's unsigned. */
2293 if (search_space_len
>= chunk_size
)
2294 search_space_len
-= chunk_size
;
2296 search_space_len
= 0;
2298 if (search_space_len
>= pattern_len
)
2300 unsigned keep_len
= search_buf_size
- chunk_size
;
2301 CORE_ADDR read_addr
= start_addr
+ keep_len
;
2304 /* Copy the trailing part of the previous iteration to the front
2305 of the buffer for the next iteration. */
2306 gdb_assert (keep_len
== pattern_len
- 1);
2307 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2309 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2311 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2312 search_buf
+ keep_len
, read_addr
,
2313 nr_to_read
) != nr_to_read
)
2315 warning (_("Unable to access target memory at %s, halting search."),
2316 hex_string (read_addr
));
2317 do_cleanups (old_cleanups
);
2321 start_addr
+= chunk_size
;
2327 do_cleanups (old_cleanups
);
2331 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2332 sequence of bytes in PATTERN with length PATTERN_LEN.
2334 The result is 1 if found, 0 if not found, and -1 if there was an error
2335 requiring halting of the search (e.g. memory read error).
2336 If the pattern is found the address is recorded in FOUND_ADDRP. */
2339 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2340 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2341 CORE_ADDR
*found_addrp
)
2343 struct target_ops
*t
;
2346 /* We don't use INHERIT to set current_target.to_search_memory,
2347 so we have to scan the target stack and handle targetdebug
2351 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2352 hex_string (start_addr
));
2354 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2355 if (t
->to_search_memory
!= NULL
)
2360 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2361 pattern
, pattern_len
, found_addrp
);
2365 /* If a special version of to_search_memory isn't available, use the
2367 found
= simple_search_memory (current_target
.beneath
,
2368 start_addr
, search_space_len
,
2369 pattern
, pattern_len
, found_addrp
);
2373 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2378 /* Look through the currently pushed targets. If none of them will
2379 be able to restart the currently running process, issue an error
2383 target_require_runnable (void)
2385 struct target_ops
*t
;
2387 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2389 /* If this target knows how to create a new program, then
2390 assume we will still be able to after killing the current
2391 one. Either killing and mourning will not pop T, or else
2392 find_default_run_target will find it again. */
2393 if (t
->to_create_inferior
!= NULL
)
2396 /* Do not worry about thread_stratum targets that can not
2397 create inferiors. Assume they will be pushed again if
2398 necessary, and continue to the process_stratum. */
2399 if (t
->to_stratum
== thread_stratum
2400 || t
->to_stratum
== arch_stratum
)
2404 The \"%s\" target does not support \"run\". Try \"help target\" or \"continue\"."),
2408 /* This function is only called if the target is running. In that
2409 case there should have been a process_stratum target and it
2410 should either know how to create inferiors, or not... */
2411 internal_error (__FILE__
, __LINE__
, "No targets found");
2414 /* Look through the list of possible targets for a target that can
2415 execute a run or attach command without any other data. This is
2416 used to locate the default process stratum.
2418 If DO_MESG is not NULL, the result is always valid (error() is
2419 called for errors); else, return NULL on error. */
2421 static struct target_ops
*
2422 find_default_run_target (char *do_mesg
)
2424 struct target_ops
**t
;
2425 struct target_ops
*runable
= NULL
;
2430 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2433 if ((*t
)->to_can_run
&& target_can_run (*t
))
2443 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2452 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
2454 struct target_ops
*t
;
2456 t
= find_default_run_target ("attach");
2457 (t
->to_attach
) (t
, args
, from_tty
);
2462 find_default_create_inferior (struct target_ops
*ops
,
2463 char *exec_file
, char *allargs
, char **env
,
2466 struct target_ops
*t
;
2468 t
= find_default_run_target ("run");
2469 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
2474 find_default_can_async_p (void)
2476 struct target_ops
*t
;
2478 /* This may be called before the target is pushed on the stack;
2479 look for the default process stratum. If there's none, gdb isn't
2480 configured with a native debugger, and target remote isn't
2482 t
= find_default_run_target (NULL
);
2483 if (t
&& t
->to_can_async_p
)
2484 return (t
->to_can_async_p
) ();
2489 find_default_is_async_p (void)
2491 struct target_ops
*t
;
2493 /* This may be called before the target is pushed on the stack;
2494 look for the default process stratum. If there's none, gdb isn't
2495 configured with a native debugger, and target remote isn't
2497 t
= find_default_run_target (NULL
);
2498 if (t
&& t
->to_is_async_p
)
2499 return (t
->to_is_async_p
) ();
2504 find_default_supports_non_stop (void)
2506 struct target_ops
*t
;
2508 t
= find_default_run_target (NULL
);
2509 if (t
&& t
->to_supports_non_stop
)
2510 return (t
->to_supports_non_stop
) ();
2515 target_supports_non_stop (void)
2517 struct target_ops
*t
;
2518 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2519 if (t
->to_supports_non_stop
)
2520 return t
->to_supports_non_stop ();
2527 target_get_osdata (const char *type
)
2530 struct target_ops
*t
;
2532 /* If we're already connected to something that can get us OS
2533 related data, use it. Otherwise, try using the native
2535 if (current_target
.to_stratum
>= process_stratum
)
2536 t
= current_target
.beneath
;
2538 t
= find_default_run_target ("get OS data");
2543 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2547 default_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
2549 return (len
<= gdbarch_ptr_bit (target_gdbarch
) / TARGET_CHAR_BIT
);
2553 default_watchpoint_addr_within_range (struct target_ops
*target
,
2555 CORE_ADDR start
, int length
)
2557 return addr
>= start
&& addr
< start
+ length
;
2560 static struct gdbarch
*
2561 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2563 return target_gdbarch
;
2579 return_minus_one (void)
2584 /* Find a single runnable target in the stack and return it. If for
2585 some reason there is more than one, return NULL. */
2588 find_run_target (void)
2590 struct target_ops
**t
;
2591 struct target_ops
*runable
= NULL
;
2596 for (t
= target_structs
; t
< target_structs
+ target_struct_size
; ++t
)
2598 if ((*t
)->to_can_run
&& target_can_run (*t
))
2605 return (count
== 1 ? runable
: NULL
);
2608 /* Find a single core_stratum target in the list of targets and return it.
2609 If for some reason there is more than one, return NULL. */
2612 find_core_target (void)
2614 struct target_ops
**t
;
2615 struct target_ops
*runable
= NULL
;
2620 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2623 if ((*t
)->to_stratum
== core_stratum
)
2630 return (count
== 1 ? runable
: NULL
);
2634 * Find the next target down the stack from the specified target.
2638 find_target_beneath (struct target_ops
*t
)
2644 /* The inferior process has died. Long live the inferior! */
2647 generic_mourn_inferior (void)
2651 ptid
= inferior_ptid
;
2652 inferior_ptid
= null_ptid
;
2654 if (!ptid_equal (ptid
, null_ptid
))
2656 int pid
= ptid_get_pid (ptid
);
2657 delete_inferior (pid
);
2660 breakpoint_init_inferior (inf_exited
);
2661 registers_changed ();
2663 reopen_exec_file ();
2664 reinit_frame_cache ();
2666 if (deprecated_detach_hook
)
2667 deprecated_detach_hook ();
2670 /* Helper function for child_wait and the derivatives of child_wait.
2671 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
2672 translation of that in OURSTATUS. */
2674 store_waitstatus (struct target_waitstatus
*ourstatus
, int hoststatus
)
2676 if (WIFEXITED (hoststatus
))
2678 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
2679 ourstatus
->value
.integer
= WEXITSTATUS (hoststatus
);
2681 else if (!WIFSTOPPED (hoststatus
))
2683 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
2684 ourstatus
->value
.sig
= target_signal_from_host (WTERMSIG (hoststatus
));
2688 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
2689 ourstatus
->value
.sig
= target_signal_from_host (WSTOPSIG (hoststatus
));
2693 /* Convert a normal process ID to a string. Returns the string in a
2697 normal_pid_to_str (ptid_t ptid
)
2699 static char buf
[32];
2701 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2706 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2708 return normal_pid_to_str (ptid
);
2711 /* Error-catcher for target_find_memory_regions */
2712 static int dummy_find_memory_regions (int (*ignore1
) (), void *ignore2
)
2714 error (_("No target."));
2718 /* Error-catcher for target_make_corefile_notes */
2719 static char * dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
2721 error (_("No target."));
2725 /* Set up the handful of non-empty slots needed by the dummy target
2729 init_dummy_target (void)
2731 dummy_target
.to_shortname
= "None";
2732 dummy_target
.to_longname
= "None";
2733 dummy_target
.to_doc
= "";
2734 dummy_target
.to_attach
= find_default_attach
;
2735 dummy_target
.to_detach
=
2736 (void (*)(struct target_ops
*, char *, int))target_ignore
;
2737 dummy_target
.to_create_inferior
= find_default_create_inferior
;
2738 dummy_target
.to_can_async_p
= find_default_can_async_p
;
2739 dummy_target
.to_is_async_p
= find_default_is_async_p
;
2740 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
2741 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
2742 dummy_target
.to_stratum
= dummy_stratum
;
2743 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
2744 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
2745 dummy_target
.to_xfer_partial
= default_xfer_partial
;
2746 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
2747 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
2748 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
2749 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
2750 dummy_target
.to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
2751 dummy_target
.to_magic
= OPS_MAGIC
;
2755 debug_to_open (char *args
, int from_tty
)
2757 debug_target
.to_open (args
, from_tty
);
2759 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
2763 target_close (struct target_ops
*targ
, int quitting
)
2765 if (targ
->to_xclose
!= NULL
)
2766 targ
->to_xclose (targ
, quitting
);
2767 else if (targ
->to_close
!= NULL
)
2768 targ
->to_close (quitting
);
2771 fprintf_unfiltered (gdb_stdlog
, "target_close (%d)\n", quitting
);
2775 target_attach (char *args
, int from_tty
)
2777 struct target_ops
*t
;
2778 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2780 if (t
->to_attach
!= NULL
)
2782 t
->to_attach (t
, args
, from_tty
);
2784 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
2790 internal_error (__FILE__
, __LINE__
,
2791 "could not find a target to attach");
2795 target_thread_alive (ptid_t ptid
)
2797 struct target_ops
*t
;
2798 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2800 if (t
->to_thread_alive
!= NULL
)
2804 retval
= t
->to_thread_alive (t
, ptid
);
2806 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
2807 PIDGET (ptid
), retval
);
2817 target_find_new_threads (void)
2819 struct target_ops
*t
;
2820 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2822 if (t
->to_find_new_threads
!= NULL
)
2824 t
->to_find_new_threads (t
);
2826 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
2834 debug_to_post_attach (int pid
)
2836 debug_target
.to_post_attach (pid
);
2838 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
2841 /* Return a pretty printed form of target_waitstatus.
2842 Space for the result is malloc'd, caller must free. */
2845 target_waitstatus_to_string (const struct target_waitstatus
*ws
)
2847 const char *kind_str
= "status->kind = ";
2851 case TARGET_WAITKIND_EXITED
:
2852 return xstrprintf ("%sexited, status = %d",
2853 kind_str
, ws
->value
.integer
);
2854 case TARGET_WAITKIND_STOPPED
:
2855 return xstrprintf ("%sstopped, signal = %s",
2856 kind_str
, target_signal_to_name (ws
->value
.sig
));
2857 case TARGET_WAITKIND_SIGNALLED
:
2858 return xstrprintf ("%ssignalled, signal = %s",
2859 kind_str
, target_signal_to_name (ws
->value
.sig
));
2860 case TARGET_WAITKIND_LOADED
:
2861 return xstrprintf ("%sloaded", kind_str
);
2862 case TARGET_WAITKIND_FORKED
:
2863 return xstrprintf ("%sforked", kind_str
);
2864 case TARGET_WAITKIND_VFORKED
:
2865 return xstrprintf ("%svforked", kind_str
);
2866 case TARGET_WAITKIND_EXECD
:
2867 return xstrprintf ("%sexecd", kind_str
);
2868 case TARGET_WAITKIND_SYSCALL_ENTRY
:
2869 return xstrprintf ("%ssyscall-entry", kind_str
);
2870 case TARGET_WAITKIND_SYSCALL_RETURN
:
2871 return xstrprintf ("%ssyscall-return", kind_str
);
2872 case TARGET_WAITKIND_SPURIOUS
:
2873 return xstrprintf ("%sspurious", kind_str
);
2874 case TARGET_WAITKIND_IGNORE
:
2875 return xstrprintf ("%signore", kind_str
);
2876 case TARGET_WAITKIND_NO_HISTORY
:
2877 return xstrprintf ("%sno-history", kind_str
);
2879 return xstrprintf ("%sunknown???", kind_str
);
2884 debug_print_register (const char * func
,
2885 struct regcache
*regcache
, int regno
)
2887 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2888 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
2889 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
2890 && gdbarch_register_name (gdbarch
, regno
) != NULL
2891 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
2892 fprintf_unfiltered (gdb_stdlog
, "(%s)",
2893 gdbarch_register_name (gdbarch
, regno
));
2895 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
2896 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
2898 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2899 int i
, size
= register_size (gdbarch
, regno
);
2900 unsigned char buf
[MAX_REGISTER_SIZE
];
2901 regcache_raw_collect (regcache
, regno
, buf
);
2902 fprintf_unfiltered (gdb_stdlog
, " = ");
2903 for (i
= 0; i
< size
; i
++)
2905 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
2907 if (size
<= sizeof (LONGEST
))
2909 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
2910 fprintf_unfiltered (gdb_stdlog
, " %s %s",
2911 core_addr_to_string_nz (val
), plongest (val
));
2914 fprintf_unfiltered (gdb_stdlog
, "\n");
2918 target_fetch_registers (struct regcache
*regcache
, int regno
)
2920 struct target_ops
*t
;
2921 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2923 if (t
->to_fetch_registers
!= NULL
)
2925 t
->to_fetch_registers (t
, regcache
, regno
);
2927 debug_print_register ("target_fetch_registers", regcache
, regno
);
2934 target_store_registers (struct regcache
*regcache
, int regno
)
2937 struct target_ops
*t
;
2938 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2940 if (t
->to_store_registers
!= NULL
)
2942 t
->to_store_registers (t
, regcache
, regno
);
2945 debug_print_register ("target_store_registers", regcache
, regno
);
2955 debug_to_prepare_to_store (struct regcache
*regcache
)
2957 debug_target
.to_prepare_to_store (regcache
);
2959 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
2963 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
2964 int write
, struct mem_attrib
*attrib
,
2965 struct target_ops
*target
)
2969 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
2972 fprintf_unfiltered (gdb_stdlog
,
2973 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
2974 paddress (target_gdbarch
, memaddr
), len
,
2975 write
? "write" : "read", retval
);
2981 fputs_unfiltered (", bytes =", gdb_stdlog
);
2982 for (i
= 0; i
< retval
; i
++)
2984 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
2986 if (targetdebug
< 2 && i
> 0)
2988 fprintf_unfiltered (gdb_stdlog
, " ...");
2991 fprintf_unfiltered (gdb_stdlog
, "\n");
2994 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
2998 fputc_unfiltered ('\n', gdb_stdlog
);
3004 debug_to_files_info (struct target_ops
*target
)
3006 debug_target
.to_files_info (target
);
3008 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3012 debug_to_insert_breakpoint (struct gdbarch
*gdbarch
,
3013 struct bp_target_info
*bp_tgt
)
3017 retval
= debug_target
.to_insert_breakpoint (gdbarch
, bp_tgt
);
3019 fprintf_unfiltered (gdb_stdlog
,
3020 "target_insert_breakpoint (0x%lx, xxx) = %ld\n",
3021 (unsigned long) bp_tgt
->placed_address
,
3022 (unsigned long) retval
);
3027 debug_to_remove_breakpoint (struct gdbarch
*gdbarch
,
3028 struct bp_target_info
*bp_tgt
)
3032 retval
= debug_target
.to_remove_breakpoint (gdbarch
, bp_tgt
);
3034 fprintf_unfiltered (gdb_stdlog
,
3035 "target_remove_breakpoint (0x%lx, xxx) = %ld\n",
3036 (unsigned long) bp_tgt
->placed_address
,
3037 (unsigned long) retval
);
3042 debug_to_can_use_hw_breakpoint (int type
, int cnt
, int from_tty
)
3046 retval
= debug_target
.to_can_use_hw_breakpoint (type
, cnt
, from_tty
);
3048 fprintf_unfiltered (gdb_stdlog
,
3049 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3050 (unsigned long) type
,
3051 (unsigned long) cnt
,
3052 (unsigned long) from_tty
,
3053 (unsigned long) retval
);
3058 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3062 retval
= debug_target
.to_region_ok_for_hw_watchpoint (addr
, len
);
3064 fprintf_unfiltered (gdb_stdlog
,
3065 "target_region_ok_for_hw_watchpoint (%ld, %ld) = 0x%lx\n",
3066 (unsigned long) addr
,
3067 (unsigned long) len
,
3068 (unsigned long) retval
);
3073 debug_to_stopped_by_watchpoint (void)
3077 retval
= debug_target
.to_stopped_by_watchpoint ();
3079 fprintf_unfiltered (gdb_stdlog
,
3080 "target_stopped_by_watchpoint () = %ld\n",
3081 (unsigned long) retval
);
3086 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3090 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3092 fprintf_unfiltered (gdb_stdlog
,
3093 "target_stopped_data_address ([0x%lx]) = %ld\n",
3094 (unsigned long)*addr
,
3095 (unsigned long)retval
);
3100 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3102 CORE_ADDR start
, int length
)
3106 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3109 fprintf_filtered (gdb_stdlog
,
3110 "target_watchpoint_addr_within_range (0x%lx, 0x%lx, %d) = %d\n",
3111 (unsigned long) addr
, (unsigned long) start
, length
,
3117 debug_to_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
3118 struct bp_target_info
*bp_tgt
)
3122 retval
= debug_target
.to_insert_hw_breakpoint (gdbarch
, bp_tgt
);
3124 fprintf_unfiltered (gdb_stdlog
,
3125 "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n",
3126 (unsigned long) bp_tgt
->placed_address
,
3127 (unsigned long) retval
);
3132 debug_to_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
3133 struct bp_target_info
*bp_tgt
)
3137 retval
= debug_target
.to_remove_hw_breakpoint (gdbarch
, bp_tgt
);
3139 fprintf_unfiltered (gdb_stdlog
,
3140 "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n",
3141 (unsigned long) bp_tgt
->placed_address
,
3142 (unsigned long) retval
);
3147 debug_to_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
3151 retval
= debug_target
.to_insert_watchpoint (addr
, len
, type
);
3153 fprintf_unfiltered (gdb_stdlog
,
3154 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
3155 (unsigned long) addr
, len
, type
, (unsigned long) retval
);
3160 debug_to_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
3164 retval
= debug_target
.to_remove_watchpoint (addr
, len
, type
);
3166 fprintf_unfiltered (gdb_stdlog
,
3167 "target_remove_watchpoint (0x%lx, %d, %d) = %ld\n",
3168 (unsigned long) addr
, len
, type
, (unsigned long) retval
);
3173 debug_to_terminal_init (void)
3175 debug_target
.to_terminal_init ();
3177 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3181 debug_to_terminal_inferior (void)
3183 debug_target
.to_terminal_inferior ();
3185 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3189 debug_to_terminal_ours_for_output (void)
3191 debug_target
.to_terminal_ours_for_output ();
3193 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3197 debug_to_terminal_ours (void)
3199 debug_target
.to_terminal_ours ();
3201 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3205 debug_to_terminal_save_ours (void)
3207 debug_target
.to_terminal_save_ours ();
3209 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3213 debug_to_terminal_info (char *arg
, int from_tty
)
3215 debug_target
.to_terminal_info (arg
, from_tty
);
3217 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3222 debug_to_load (char *args
, int from_tty
)
3224 debug_target
.to_load (args
, from_tty
);
3226 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3230 debug_to_lookup_symbol (char *name
, CORE_ADDR
*addrp
)
3234 retval
= debug_target
.to_lookup_symbol (name
, addrp
);
3236 fprintf_unfiltered (gdb_stdlog
, "target_lookup_symbol (%s, xxx)\n", name
);
3242 debug_to_post_startup_inferior (ptid_t ptid
)
3244 debug_target
.to_post_startup_inferior (ptid
);
3246 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3251 debug_to_acknowledge_created_inferior (int pid
)
3253 debug_target
.to_acknowledge_created_inferior (pid
);
3255 fprintf_unfiltered (gdb_stdlog
, "target_acknowledge_created_inferior (%d)\n",
3260 debug_to_insert_fork_catchpoint (int pid
)
3262 debug_target
.to_insert_fork_catchpoint (pid
);
3264 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d)\n",
3269 debug_to_remove_fork_catchpoint (int pid
)
3273 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
3275 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3282 debug_to_insert_vfork_catchpoint (int pid
)
3284 debug_target
.to_insert_vfork_catchpoint (pid
);
3286 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d)\n",
3291 debug_to_remove_vfork_catchpoint (int pid
)
3295 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
3297 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3304 debug_to_insert_exec_catchpoint (int pid
)
3306 debug_target
.to_insert_exec_catchpoint (pid
);
3308 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d)\n",
3313 debug_to_remove_exec_catchpoint (int pid
)
3317 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
3319 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3326 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
3330 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
3332 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3333 pid
, wait_status
, *exit_status
, has_exited
);
3339 debug_to_can_run (void)
3343 retval
= debug_target
.to_can_run ();
3345 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3351 debug_to_notice_signals (ptid_t ptid
)
3353 debug_target
.to_notice_signals (ptid
);
3355 fprintf_unfiltered (gdb_stdlog
, "target_notice_signals (%d)\n",
3359 static struct gdbarch
*
3360 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3362 struct gdbarch
*retval
;
3364 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3366 fprintf_unfiltered (gdb_stdlog
, "target_thread_architecture (%s) = %p [%s]\n",
3367 target_pid_to_str (ptid
), retval
,
3368 gdbarch_bfd_arch_info (retval
)->printable_name
);
3373 debug_to_stop (ptid_t ptid
)
3375 debug_target
.to_stop (ptid
);
3377 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
3378 target_pid_to_str (ptid
));
3382 debug_to_rcmd (char *command
,
3383 struct ui_file
*outbuf
)
3385 debug_target
.to_rcmd (command
, outbuf
);
3386 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
3390 debug_to_pid_to_exec_file (int pid
)
3394 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
3396 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
3403 setup_target_debug (void)
3405 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3407 current_target
.to_open
= debug_to_open
;
3408 current_target
.to_post_attach
= debug_to_post_attach
;
3409 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
3410 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
3411 current_target
.to_files_info
= debug_to_files_info
;
3412 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
3413 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
3414 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
3415 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
3416 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
3417 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
3418 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
3419 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
3420 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
3421 current_target
.to_watchpoint_addr_within_range
= debug_to_watchpoint_addr_within_range
;
3422 current_target
.to_region_ok_for_hw_watchpoint
= debug_to_region_ok_for_hw_watchpoint
;
3423 current_target
.to_terminal_init
= debug_to_terminal_init
;
3424 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
3425 current_target
.to_terminal_ours_for_output
= debug_to_terminal_ours_for_output
;
3426 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
3427 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
3428 current_target
.to_terminal_info
= debug_to_terminal_info
;
3429 current_target
.to_load
= debug_to_load
;
3430 current_target
.to_lookup_symbol
= debug_to_lookup_symbol
;
3431 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
3432 current_target
.to_acknowledge_created_inferior
= debug_to_acknowledge_created_inferior
;
3433 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
3434 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
3435 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
3436 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
3437 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
3438 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
3439 current_target
.to_has_exited
= debug_to_has_exited
;
3440 current_target
.to_can_run
= debug_to_can_run
;
3441 current_target
.to_notice_signals
= debug_to_notice_signals
;
3442 current_target
.to_stop
= debug_to_stop
;
3443 current_target
.to_rcmd
= debug_to_rcmd
;
3444 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
3445 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
3449 static char targ_desc
[] =
3450 "Names of targets and files being debugged.\n\
3451 Shows the entire stack of targets currently in use (including the exec-file,\n\
3452 core-file, and process, if any), as well as the symbol file name.";
3455 do_monitor_command (char *cmd
,
3458 if ((current_target
.to_rcmd
3459 == (void (*) (char *, struct ui_file
*)) tcomplain
)
3460 || (current_target
.to_rcmd
== debug_to_rcmd
3461 && (debug_target
.to_rcmd
3462 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
3463 error (_("\"monitor\" command not supported by this target."));
3464 target_rcmd (cmd
, gdb_stdtarg
);
3467 /* Print the name of each layers of our target stack. */
3470 maintenance_print_target_stack (char *cmd
, int from_tty
)
3472 struct target_ops
*t
;
3474 printf_filtered (_("The current target stack is:\n"));
3476 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3478 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3482 /* Controls if async mode is permitted. */
3483 int target_async_permitted
= 0;
3485 /* The set command writes to this variable. If the inferior is
3486 executing, linux_nat_async_permitted is *not* updated. */
3487 static int target_async_permitted_1
= 0;
3490 set_maintenance_target_async_permitted (char *args
, int from_tty
,
3491 struct cmd_list_element
*c
)
3493 if (have_live_inferiors ())
3495 target_async_permitted_1
= target_async_permitted
;
3496 error (_("Cannot change this setting while the inferior is running."));
3499 target_async_permitted
= target_async_permitted_1
;
3503 show_maintenance_target_async_permitted (struct ui_file
*file
, int from_tty
,
3504 struct cmd_list_element
*c
,
3507 fprintf_filtered (file
, _("\
3508 Controlling the inferior in asynchronous mode is %s.\n"), value
);
3512 initialize_targets (void)
3514 init_dummy_target ();
3515 push_target (&dummy_target
);
3517 add_info ("target", target_info
, targ_desc
);
3518 add_info ("files", target_info
, targ_desc
);
3520 add_setshow_zinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3521 Set target debugging."), _("\
3522 Show target debugging."), _("\
3523 When non-zero, target debugging is enabled. Higher numbers are more\n\
3524 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
3528 &setdebuglist
, &showdebuglist
);
3530 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3531 &trust_readonly
, _("\
3532 Set mode for reading from readonly sections."), _("\
3533 Show mode for reading from readonly sections."), _("\
3534 When this mode is on, memory reads from readonly sections (such as .text)\n\
3535 will be read from the object file instead of from the target. This will\n\
3536 result in significant performance improvement for remote targets."),
3538 show_trust_readonly
,
3539 &setlist
, &showlist
);
3541 add_com ("monitor", class_obscure
, do_monitor_command
,
3542 _("Send a command to the remote monitor (remote targets only)."));
3544 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3545 _("Print the name of each layer of the internal target stack."),
3546 &maintenanceprintlist
);
3548 add_setshow_boolean_cmd ("target-async", no_class
,
3549 &target_async_permitted_1
, _("\
3550 Set whether gdb controls the inferior in asynchronous mode."), _("\
3551 Show whether gdb controls the inferior in asynchronous mode."), _("\
3552 Tells gdb whether to control the inferior in asynchronous mode."),
3553 set_maintenance_target_async_permitted
,
3554 show_maintenance_target_async_permitted
,
3558 add_setshow_boolean_cmd ("stack-cache", class_support
,
3559 &stack_cache_enabled_p_1
, _("\
3560 Set cache use for stack access."), _("\
3561 Show cache use for stack access."), _("\
3562 When on, use the data cache for all stack access, regardless of any\n\
3563 configured memory regions. This improves remote performance significantly.\n\
3564 By default, caching for stack access is on."),
3565 set_stack_cache_enabled_p
,
3566 show_stack_cache_enabled_p
,
3567 &setlist
, &showlist
);
3569 target_dcache
= dcache_init ();