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, 2010, 2011
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"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops
*,
53 CORE_ADDR
, CORE_ADDR
, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
57 static int nosymbol (char *, CORE_ADDR
*);
59 static void tcomplain (void) ATTRIBUTE_NORETURN
;
61 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
63 static int return_zero (void);
65 static int return_one (void);
67 static int return_minus_one (void);
69 void target_ignore (void);
71 static void target_command (char *, int);
73 static struct target_ops
*find_default_run_target (char *);
75 static LONGEST
default_xfer_partial (struct target_ops
*ops
,
76 enum target_object object
,
77 const char *annex
, gdb_byte
*readbuf
,
78 const gdb_byte
*writebuf
,
79 ULONGEST offset
, LONGEST len
);
81 static LONGEST
current_xfer_partial (struct target_ops
*ops
,
82 enum target_object object
,
83 const char *annex
, gdb_byte
*readbuf
,
84 const gdb_byte
*writebuf
,
85 ULONGEST offset
, LONGEST len
);
87 static LONGEST
target_xfer_partial (struct target_ops
*ops
,
88 enum target_object object
,
90 void *readbuf
, const void *writebuf
,
91 ULONGEST offset
, LONGEST len
);
93 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
96 static void init_dummy_target (void);
98 static struct target_ops debug_target
;
100 static void debug_to_open (char *, int);
102 static void debug_to_prepare_to_store (struct regcache
*);
104 static void debug_to_files_info (struct target_ops
*);
106 static int debug_to_insert_breakpoint (struct gdbarch
*,
107 struct bp_target_info
*);
109 static int debug_to_remove_breakpoint (struct gdbarch
*,
110 struct bp_target_info
*);
112 static int debug_to_can_use_hw_breakpoint (int, int, int);
114 static int debug_to_insert_hw_breakpoint (struct gdbarch
*,
115 struct bp_target_info
*);
117 static int debug_to_remove_hw_breakpoint (struct gdbarch
*,
118 struct bp_target_info
*);
120 static int debug_to_insert_watchpoint (CORE_ADDR
, int, int,
121 struct expression
*);
123 static int debug_to_remove_watchpoint (CORE_ADDR
, int, int,
124 struct expression
*);
126 static int debug_to_stopped_by_watchpoint (void);
128 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
130 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
131 CORE_ADDR
, CORE_ADDR
, int);
133 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
135 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR
, int, int,
136 struct expression
*);
138 static void debug_to_terminal_init (void);
140 static void debug_to_terminal_inferior (void);
142 static void debug_to_terminal_ours_for_output (void);
144 static void debug_to_terminal_save_ours (void);
146 static void debug_to_terminal_ours (void);
148 static void debug_to_terminal_info (char *, int);
150 static void debug_to_load (char *, int);
152 static int debug_to_lookup_symbol (char *, CORE_ADDR
*);
154 static int debug_to_can_run (void);
156 static void debug_to_notice_signals (ptid_t
);
158 static void debug_to_stop (ptid_t
);
160 /* Pointer to array of target architecture structures; the size of the
161 array; the current index into the array; the allocated size of the
163 struct target_ops
**target_structs
;
164 unsigned target_struct_size
;
165 unsigned target_struct_index
;
166 unsigned target_struct_allocsize
;
167 #define DEFAULT_ALLOCSIZE 10
169 /* The initial current target, so that there is always a semi-valid
172 static struct target_ops dummy_target
;
174 /* Top of target stack. */
176 static struct target_ops
*target_stack
;
178 /* The target structure we are currently using to talk to a process
179 or file or whatever "inferior" we have. */
181 struct target_ops current_target
;
183 /* Command list for target. */
185 static struct cmd_list_element
*targetlist
= NULL
;
187 /* Nonzero if we should trust readonly sections from the
188 executable when reading memory. */
190 static int trust_readonly
= 0;
192 /* Nonzero if we should show true memory content including
193 memory breakpoint inserted by gdb. */
195 static int show_memory_breakpoints
= 0;
197 /* These globals control whether GDB attempts to perform these
198 operations; they are useful for targets that need to prevent
199 inadvertant disruption, such as in non-stop mode. */
201 int may_write_registers
= 1;
203 int may_write_memory
= 1;
205 int may_insert_breakpoints
= 1;
207 int may_insert_tracepoints
= 1;
209 int may_insert_fast_tracepoints
= 1;
213 /* Non-zero if we want to see trace of target level stuff. */
215 static int targetdebug
= 0;
217 show_targetdebug (struct ui_file
*file
, int from_tty
,
218 struct cmd_list_element
*c
, const char *value
)
220 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
223 static void setup_target_debug (void);
225 /* The option sets this. */
226 static int stack_cache_enabled_p_1
= 1;
227 /* And set_stack_cache_enabled_p updates this.
228 The reason for the separation is so that we don't flush the cache for
229 on->on transitions. */
230 static int stack_cache_enabled_p
= 1;
232 /* This is called *after* the stack-cache has been set.
233 Flush the cache for off->on and on->off transitions.
234 There's no real need to flush the cache for on->off transitions,
235 except cleanliness. */
238 set_stack_cache_enabled_p (char *args
, int from_tty
,
239 struct cmd_list_element
*c
)
241 if (stack_cache_enabled_p
!= stack_cache_enabled_p_1
)
242 target_dcache_invalidate ();
244 stack_cache_enabled_p
= stack_cache_enabled_p_1
;
248 show_stack_cache_enabled_p (struct ui_file
*file
, int from_tty
,
249 struct cmd_list_element
*c
, const char *value
)
251 fprintf_filtered (file
, _("Cache use for stack accesses is %s.\n"), value
);
254 /* Cache of memory operations, to speed up remote access. */
255 static DCACHE
*target_dcache
;
257 /* Invalidate the target dcache. */
260 target_dcache_invalidate (void)
262 dcache_invalidate (target_dcache
);
265 /* The user just typed 'target' without the name of a target. */
268 target_command (char *arg
, int from_tty
)
270 fputs_filtered ("Argument required (target name). Try `help target'\n",
274 /* Default target_has_* methods for process_stratum targets. */
277 default_child_has_all_memory (struct target_ops
*ops
)
279 /* If no inferior selected, then we can't read memory here. */
280 if (ptid_equal (inferior_ptid
, null_ptid
))
287 default_child_has_memory (struct target_ops
*ops
)
289 /* If no inferior selected, then we can't read memory here. */
290 if (ptid_equal (inferior_ptid
, null_ptid
))
297 default_child_has_stack (struct target_ops
*ops
)
299 /* If no inferior selected, there's no stack. */
300 if (ptid_equal (inferior_ptid
, null_ptid
))
307 default_child_has_registers (struct target_ops
*ops
)
309 /* Can't read registers from no inferior. */
310 if (ptid_equal (inferior_ptid
, null_ptid
))
317 default_child_has_execution (struct target_ops
*ops
)
319 /* If there's no thread selected, then we can't make it run through
321 if (ptid_equal (inferior_ptid
, null_ptid
))
329 target_has_all_memory_1 (void)
331 struct target_ops
*t
;
333 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
334 if (t
->to_has_all_memory (t
))
341 target_has_memory_1 (void)
343 struct target_ops
*t
;
345 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
346 if (t
->to_has_memory (t
))
353 target_has_stack_1 (void)
355 struct target_ops
*t
;
357 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
358 if (t
->to_has_stack (t
))
365 target_has_registers_1 (void)
367 struct target_ops
*t
;
369 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
370 if (t
->to_has_registers (t
))
377 target_has_execution_1 (void)
379 struct target_ops
*t
;
381 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
382 if (t
->to_has_execution (t
))
388 /* Add a possible target architecture to the list. */
391 add_target (struct target_ops
*t
)
393 /* Provide default values for all "must have" methods. */
394 if (t
->to_xfer_partial
== NULL
)
395 t
->to_xfer_partial
= default_xfer_partial
;
397 if (t
->to_has_all_memory
== NULL
)
398 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
400 if (t
->to_has_memory
== NULL
)
401 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
403 if (t
->to_has_stack
== NULL
)
404 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
406 if (t
->to_has_registers
== NULL
)
407 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
409 if (t
->to_has_execution
== NULL
)
410 t
->to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
414 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
415 target_structs
= (struct target_ops
**) xmalloc
416 (target_struct_allocsize
* sizeof (*target_structs
));
418 if (target_struct_size
>= target_struct_allocsize
)
420 target_struct_allocsize
*= 2;
421 target_structs
= (struct target_ops
**)
422 xrealloc ((char *) target_structs
,
423 target_struct_allocsize
* sizeof (*target_structs
));
425 target_structs
[target_struct_size
++] = t
;
427 if (targetlist
== NULL
)
428 add_prefix_cmd ("target", class_run
, target_command
, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist
, "target ", 0, &cmdlist
);
435 add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
448 struct target_ops
*t
;
450 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
451 if (t
->to_kill
!= NULL
)
454 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
464 target_load (char *arg
, int from_tty
)
466 target_dcache_invalidate ();
467 (*current_target
.to_load
) (arg
, from_tty
);
471 target_create_inferior (char *exec_file
, char *args
,
472 char **env
, int from_tty
)
474 struct target_ops
*t
;
476 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
478 if (t
->to_create_inferior
!= NULL
)
480 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
482 fprintf_unfiltered (gdb_stdlog
,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file
, args
, from_tty
);
489 internal_error (__FILE__
, __LINE__
,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution
)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target
.to_terminal_inferior
) ();
509 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
510 struct target_ops
*t
)
512 errno
= EIO
; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target
.to_shortname
);
526 error (_("You can't do that without a process to debug."));
530 nosymbol (char *name
, CORE_ADDR
*addrp
)
532 return 1; /* Symbol does not exist in target env. */
536 default_terminal_info (char *args
, int from_tty
)
538 printf_unfiltered (_("No saved terminal information.\n"));
541 /* A default implementation for the to_get_ada_task_ptid target method.
543 This function builds the PTID by using both LWP and TID as part of
544 the PTID lwp and tid elements. The pid used is the pid of the
548 default_get_ada_task_ptid (long lwp
, long tid
)
550 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
553 /* Go through the target stack from top to bottom, copying over zero
554 entries in current_target, then filling in still empty entries. In
555 effect, we are doing class inheritance through the pushed target
558 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
559 is currently implemented, is that it discards any knowledge of
560 which target an inherited method originally belonged to.
561 Consequently, new new target methods should instead explicitly and
562 locally search the target stack for the target that can handle the
566 update_current_target (void)
568 struct target_ops
*t
;
570 /* First, reset current's contents. */
571 memset (¤t_target
, 0, sizeof (current_target
));
573 #define INHERIT(FIELD, TARGET) \
574 if (!current_target.FIELD) \
575 current_target.FIELD = (TARGET)->FIELD
577 for (t
= target_stack
; t
; t
= t
->beneath
)
579 INHERIT (to_shortname
, t
);
580 INHERIT (to_longname
, t
);
582 /* Do not inherit to_open. */
583 /* Do not inherit to_close. */
584 /* Do not inherit to_attach. */
585 INHERIT (to_post_attach
, t
);
586 INHERIT (to_attach_no_wait
, t
);
587 /* Do not inherit to_detach. */
588 /* Do not inherit to_disconnect. */
589 /* Do not inherit to_resume. */
590 /* Do not inherit to_wait. */
591 /* Do not inherit to_fetch_registers. */
592 /* Do not inherit to_store_registers. */
593 INHERIT (to_prepare_to_store
, t
);
594 INHERIT (deprecated_xfer_memory
, t
);
595 INHERIT (to_files_info
, t
);
596 INHERIT (to_insert_breakpoint
, t
);
597 INHERIT (to_remove_breakpoint
, t
);
598 INHERIT (to_can_use_hw_breakpoint
, t
);
599 INHERIT (to_insert_hw_breakpoint
, t
);
600 INHERIT (to_remove_hw_breakpoint
, t
);
601 INHERIT (to_insert_watchpoint
, t
);
602 INHERIT (to_remove_watchpoint
, t
);
603 INHERIT (to_stopped_data_address
, t
);
604 INHERIT (to_have_steppable_watchpoint
, t
);
605 INHERIT (to_have_continuable_watchpoint
, t
);
606 INHERIT (to_stopped_by_watchpoint
, t
);
607 INHERIT (to_watchpoint_addr_within_range
, t
);
608 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
609 INHERIT (to_can_accel_watchpoint_condition
, t
);
610 INHERIT (to_terminal_init
, t
);
611 INHERIT (to_terminal_inferior
, t
);
612 INHERIT (to_terminal_ours_for_output
, t
);
613 INHERIT (to_terminal_ours
, t
);
614 INHERIT (to_terminal_save_ours
, t
);
615 INHERIT (to_terminal_info
, t
);
616 /* Do not inherit to_kill. */
617 INHERIT (to_load
, t
);
618 INHERIT (to_lookup_symbol
, t
);
619 /* Do no inherit to_create_inferior. */
620 INHERIT (to_post_startup_inferior
, t
);
621 INHERIT (to_insert_fork_catchpoint
, t
);
622 INHERIT (to_remove_fork_catchpoint
, t
);
623 INHERIT (to_insert_vfork_catchpoint
, t
);
624 INHERIT (to_remove_vfork_catchpoint
, t
);
625 /* Do not inherit to_follow_fork. */
626 INHERIT (to_insert_exec_catchpoint
, t
);
627 INHERIT (to_remove_exec_catchpoint
, t
);
628 INHERIT (to_set_syscall_catchpoint
, t
);
629 INHERIT (to_has_exited
, t
);
630 /* Do not inherit to_mourn_inferior. */
631 INHERIT (to_can_run
, t
);
632 INHERIT (to_notice_signals
, t
);
633 /* Do not inherit to_thread_alive. */
634 /* Do not inherit to_find_new_threads. */
635 /* Do not inherit to_pid_to_str. */
636 INHERIT (to_extra_thread_info
, t
);
637 INHERIT (to_thread_name
, t
);
638 INHERIT (to_stop
, t
);
639 /* Do not inherit to_xfer_partial. */
640 INHERIT (to_rcmd
, t
);
641 INHERIT (to_pid_to_exec_file
, t
);
642 INHERIT (to_log_command
, t
);
643 INHERIT (to_stratum
, t
);
644 /* Do not inherit to_has_all_memory. */
645 /* Do not inherit to_has_memory. */
646 /* Do not inherit to_has_stack. */
647 /* Do not inherit to_has_registers. */
648 /* Do not inherit to_has_execution. */
649 INHERIT (to_has_thread_control
, t
);
650 INHERIT (to_can_async_p
, t
);
651 INHERIT (to_is_async_p
, t
);
652 INHERIT (to_async
, t
);
653 INHERIT (to_async_mask
, t
);
654 INHERIT (to_find_memory_regions
, t
);
655 INHERIT (to_make_corefile_notes
, t
);
656 INHERIT (to_get_bookmark
, t
);
657 INHERIT (to_goto_bookmark
, t
);
658 /* Do not inherit to_get_thread_local_address. */
659 INHERIT (to_can_execute_reverse
, t
);
660 INHERIT (to_thread_architecture
, t
);
661 /* Do not inherit to_read_description. */
662 INHERIT (to_get_ada_task_ptid
, t
);
663 /* Do not inherit to_search_memory. */
664 INHERIT (to_supports_multi_process
, t
);
665 INHERIT (to_trace_init
, t
);
666 INHERIT (to_download_tracepoint
, t
);
667 INHERIT (to_download_trace_state_variable
, t
);
668 INHERIT (to_trace_set_readonly_regions
, t
);
669 INHERIT (to_trace_start
, t
);
670 INHERIT (to_get_trace_status
, t
);
671 INHERIT (to_trace_stop
, t
);
672 INHERIT (to_trace_find
, t
);
673 INHERIT (to_get_trace_state_variable_value
, t
);
674 INHERIT (to_save_trace_data
, t
);
675 INHERIT (to_upload_tracepoints
, t
);
676 INHERIT (to_upload_trace_state_variables
, t
);
677 INHERIT (to_get_raw_trace_data
, t
);
678 INHERIT (to_set_disconnected_tracing
, t
);
679 INHERIT (to_set_circular_trace_buffer
, t
);
680 INHERIT (to_get_tib_address
, t
);
681 INHERIT (to_set_permissions
, t
);
682 INHERIT (to_static_tracepoint_marker_at
, t
);
683 INHERIT (to_static_tracepoint_markers_by_strid
, t
);
684 INHERIT (to_traceframe_info
, t
);
685 INHERIT (to_magic
, t
);
686 /* Do not inherit to_memory_map. */
687 /* Do not inherit to_flash_erase. */
688 /* Do not inherit to_flash_done. */
692 /* Clean up a target struct so it no longer has any zero pointers in
693 it. Some entries are defaulted to a method that print an error,
694 others are hard-wired to a standard recursive default. */
696 #define de_fault(field, value) \
697 if (!current_target.field) \
698 current_target.field = value
701 (void (*) (char *, int))
706 de_fault (to_post_attach
,
709 de_fault (to_prepare_to_store
,
710 (void (*) (struct regcache
*))
712 de_fault (deprecated_xfer_memory
,
713 (int (*) (CORE_ADDR
, gdb_byte
*, int, int,
714 struct mem_attrib
*, struct target_ops
*))
716 de_fault (to_files_info
,
717 (void (*) (struct target_ops
*))
719 de_fault (to_insert_breakpoint
,
720 memory_insert_breakpoint
);
721 de_fault (to_remove_breakpoint
,
722 memory_remove_breakpoint
);
723 de_fault (to_can_use_hw_breakpoint
,
724 (int (*) (int, int, int))
726 de_fault (to_insert_hw_breakpoint
,
727 (int (*) (struct gdbarch
*, struct bp_target_info
*))
729 de_fault (to_remove_hw_breakpoint
,
730 (int (*) (struct gdbarch
*, struct bp_target_info
*))
732 de_fault (to_insert_watchpoint
,
733 (int (*) (CORE_ADDR
, int, int, struct expression
*))
735 de_fault (to_remove_watchpoint
,
736 (int (*) (CORE_ADDR
, int, int, struct expression
*))
738 de_fault (to_stopped_by_watchpoint
,
741 de_fault (to_stopped_data_address
,
742 (int (*) (struct target_ops
*, CORE_ADDR
*))
744 de_fault (to_watchpoint_addr_within_range
,
745 default_watchpoint_addr_within_range
);
746 de_fault (to_region_ok_for_hw_watchpoint
,
747 default_region_ok_for_hw_watchpoint
);
748 de_fault (to_can_accel_watchpoint_condition
,
749 (int (*) (CORE_ADDR
, int, int, struct expression
*))
751 de_fault (to_terminal_init
,
754 de_fault (to_terminal_inferior
,
757 de_fault (to_terminal_ours_for_output
,
760 de_fault (to_terminal_ours
,
763 de_fault (to_terminal_save_ours
,
766 de_fault (to_terminal_info
,
767 default_terminal_info
);
769 (void (*) (char *, int))
771 de_fault (to_lookup_symbol
,
772 (int (*) (char *, CORE_ADDR
*))
774 de_fault (to_post_startup_inferior
,
777 de_fault (to_insert_fork_catchpoint
,
780 de_fault (to_remove_fork_catchpoint
,
783 de_fault (to_insert_vfork_catchpoint
,
786 de_fault (to_remove_vfork_catchpoint
,
789 de_fault (to_insert_exec_catchpoint
,
792 de_fault (to_remove_exec_catchpoint
,
795 de_fault (to_set_syscall_catchpoint
,
796 (int (*) (int, int, int, int, int *))
798 de_fault (to_has_exited
,
799 (int (*) (int, int, int *))
801 de_fault (to_can_run
,
803 de_fault (to_notice_signals
,
806 de_fault (to_extra_thread_info
,
807 (char *(*) (struct thread_info
*))
809 de_fault (to_thread_name
,
810 (char *(*) (struct thread_info
*))
815 current_target
.to_xfer_partial
= current_xfer_partial
;
817 (void (*) (char *, struct ui_file
*))
819 de_fault (to_pid_to_exec_file
,
823 (void (*) (void (*) (enum inferior_event_type
, void*), void*))
825 de_fault (to_async_mask
,
828 de_fault (to_thread_architecture
,
829 default_thread_architecture
);
830 current_target
.to_read_description
= NULL
;
831 de_fault (to_get_ada_task_ptid
,
832 (ptid_t (*) (long, long))
833 default_get_ada_task_ptid
);
834 de_fault (to_supports_multi_process
,
837 de_fault (to_trace_init
,
840 de_fault (to_download_tracepoint
,
841 (void (*) (struct breakpoint
*))
843 de_fault (to_download_trace_state_variable
,
844 (void (*) (struct trace_state_variable
*))
846 de_fault (to_trace_set_readonly_regions
,
849 de_fault (to_trace_start
,
852 de_fault (to_get_trace_status
,
853 (int (*) (struct trace_status
*))
855 de_fault (to_trace_stop
,
858 de_fault (to_trace_find
,
859 (int (*) (enum trace_find_type
, int, ULONGEST
, ULONGEST
, int *))
861 de_fault (to_get_trace_state_variable_value
,
862 (int (*) (int, LONGEST
*))
864 de_fault (to_save_trace_data
,
865 (int (*) (const char *))
867 de_fault (to_upload_tracepoints
,
868 (int (*) (struct uploaded_tp
**))
870 de_fault (to_upload_trace_state_variables
,
871 (int (*) (struct uploaded_tsv
**))
873 de_fault (to_get_raw_trace_data
,
874 (LONGEST (*) (gdb_byte
*, ULONGEST
, LONGEST
))
876 de_fault (to_set_disconnected_tracing
,
879 de_fault (to_set_circular_trace_buffer
,
882 de_fault (to_get_tib_address
,
883 (int (*) (ptid_t
, CORE_ADDR
*))
885 de_fault (to_set_permissions
,
888 de_fault (to_static_tracepoint_marker_at
,
889 (int (*) (CORE_ADDR
, struct static_tracepoint_marker
*))
891 de_fault (to_static_tracepoint_markers_by_strid
,
892 (VEC(static_tracepoint_marker_p
) * (*) (const char *))
894 de_fault (to_traceframe_info
,
895 (struct traceframe_info
* (*) (void))
899 /* Finally, position the target-stack beneath the squashed
900 "current_target". That way code looking for a non-inherited
901 target method can quickly and simply find it. */
902 current_target
.beneath
= target_stack
;
905 setup_target_debug ();
908 /* Push a new target type into the stack of the existing target accessors,
909 possibly superseding some of the existing accessors.
911 Rather than allow an empty stack, we always have the dummy target at
912 the bottom stratum, so we can call the function vectors without
916 push_target (struct target_ops
*t
)
918 struct target_ops
**cur
;
920 /* Check magic number. If wrong, it probably means someone changed
921 the struct definition, but not all the places that initialize one. */
922 if (t
->to_magic
!= OPS_MAGIC
)
924 fprintf_unfiltered (gdb_stderr
,
925 "Magic number of %s target struct wrong\n",
927 internal_error (__FILE__
, __LINE__
,
928 _("failed internal consistency check"));
931 /* Find the proper stratum to install this target in. */
932 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
934 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
938 /* If there's already targets at this stratum, remove them. */
939 /* FIXME: cagney/2003-10-15: I think this should be popping all
940 targets to CUR, and not just those at this stratum level. */
941 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
943 /* There's already something at this stratum level. Close it,
944 and un-hook it from the stack. */
945 struct target_ops
*tmp
= (*cur
);
947 (*cur
) = (*cur
)->beneath
;
949 target_close (tmp
, 0);
952 /* We have removed all targets in our stratum, now add the new one. */
956 update_current_target ();
959 /* Remove a target_ops vector from the stack, wherever it may be.
960 Return how many times it was removed (0 or 1). */
963 unpush_target (struct target_ops
*t
)
965 struct target_ops
**cur
;
966 struct target_ops
*tmp
;
968 if (t
->to_stratum
== dummy_stratum
)
969 internal_error (__FILE__
, __LINE__
,
970 _("Attempt to unpush the dummy target"));
972 /* Look for the specified target. Note that we assume that a target
973 can only occur once in the target stack. */
975 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
982 return 0; /* Didn't find target_ops, quit now. */
984 /* NOTE: cagney/2003-12-06: In '94 the close call was made
985 unconditional by moving it to before the above check that the
986 target was in the target stack (something about "Change the way
987 pushing and popping of targets work to support target overlays
988 and inheritance"). This doesn't make much sense - only open
989 targets should be closed. */
992 /* Unchain the target. */
994 (*cur
) = (*cur
)->beneath
;
997 update_current_target ();
1005 target_close (target_stack
, 0); /* Let it clean up. */
1006 if (unpush_target (target_stack
) == 1)
1009 fprintf_unfiltered (gdb_stderr
,
1010 "pop_target couldn't find target %s\n",
1011 current_target
.to_shortname
);
1012 internal_error (__FILE__
, __LINE__
,
1013 _("failed internal consistency check"));
1017 pop_all_targets_above (enum strata above_stratum
, int quitting
)
1019 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
1021 target_close (target_stack
, quitting
);
1022 if (!unpush_target (target_stack
))
1024 fprintf_unfiltered (gdb_stderr
,
1025 "pop_all_targets couldn't find target %s\n",
1026 target_stack
->to_shortname
);
1027 internal_error (__FILE__
, __LINE__
,
1028 _("failed internal consistency check"));
1035 pop_all_targets (int quitting
)
1037 pop_all_targets_above (dummy_stratum
, quitting
);
1040 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1043 target_is_pushed (struct target_ops
*t
)
1045 struct target_ops
**cur
;
1047 /* Check magic number. If wrong, it probably means someone changed
1048 the struct definition, but not all the places that initialize one. */
1049 if (t
->to_magic
!= OPS_MAGIC
)
1051 fprintf_unfiltered (gdb_stderr
,
1052 "Magic number of %s target struct wrong\n",
1054 internal_error (__FILE__
, __LINE__
,
1055 _("failed internal consistency check"));
1058 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1065 /* Using the objfile specified in OBJFILE, find the address for the
1066 current thread's thread-local storage with offset OFFSET. */
1068 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1070 volatile CORE_ADDR addr
= 0;
1071 struct target_ops
*target
;
1073 for (target
= current_target
.beneath
;
1075 target
= target
->beneath
)
1077 if (target
->to_get_thread_local_address
!= NULL
)
1082 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch
))
1084 ptid_t ptid
= inferior_ptid
;
1085 volatile struct gdb_exception ex
;
1087 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1091 /* Fetch the load module address for this objfile. */
1092 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch
,
1094 /* If it's 0, throw the appropriate exception. */
1096 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1097 _("TLS load module not found"));
1099 addr
= target
->to_get_thread_local_address (target
, ptid
,
1102 /* If an error occurred, print TLS related messages here. Otherwise,
1103 throw the error to some higher catcher. */
1106 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1110 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1111 error (_("Cannot find thread-local variables "
1112 "in this thread library."));
1114 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1115 if (objfile_is_library
)
1116 error (_("Cannot find shared library `%s' in dynamic"
1117 " linker's load module list"), objfile
->name
);
1119 error (_("Cannot find executable file `%s' in dynamic"
1120 " linker's load module list"), objfile
->name
);
1122 case TLS_NOT_ALLOCATED_YET_ERROR
:
1123 if (objfile_is_library
)
1124 error (_("The inferior has not yet allocated storage for"
1125 " thread-local variables in\n"
1126 "the shared library `%s'\n"
1128 objfile
->name
, target_pid_to_str (ptid
));
1130 error (_("The inferior has not yet allocated storage for"
1131 " thread-local variables in\n"
1132 "the executable `%s'\n"
1134 objfile
->name
, target_pid_to_str (ptid
));
1136 case TLS_GENERIC_ERROR
:
1137 if (objfile_is_library
)
1138 error (_("Cannot find thread-local storage for %s, "
1139 "shared library %s:\n%s"),
1140 target_pid_to_str (ptid
),
1141 objfile
->name
, ex
.message
);
1143 error (_("Cannot find thread-local storage for %s, "
1144 "executable file %s:\n%s"),
1145 target_pid_to_str (ptid
),
1146 objfile
->name
, ex
.message
);
1149 throw_exception (ex
);
1154 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1155 TLS is an ABI-specific thing. But we don't do that yet. */
1157 error (_("Cannot find thread-local variables on this target"));
1163 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1165 /* target_read_string -- read a null terminated string, up to LEN bytes,
1166 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1167 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1168 is responsible for freeing it. Return the number of bytes successfully
1172 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1174 int tlen
, origlen
, offset
, i
;
1178 int buffer_allocated
;
1180 unsigned int nbytes_read
= 0;
1182 gdb_assert (string
);
1184 /* Small for testing. */
1185 buffer_allocated
= 4;
1186 buffer
= xmalloc (buffer_allocated
);
1193 tlen
= MIN (len
, 4 - (memaddr
& 3));
1194 offset
= memaddr
& 3;
1196 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1199 /* The transfer request might have crossed the boundary to an
1200 unallocated region of memory. Retry the transfer, requesting
1204 errcode
= target_read_memory (memaddr
, buf
, 1);
1209 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1213 bytes
= bufptr
- buffer
;
1214 buffer_allocated
*= 2;
1215 buffer
= xrealloc (buffer
, buffer_allocated
);
1216 bufptr
= buffer
+ bytes
;
1219 for (i
= 0; i
< tlen
; i
++)
1221 *bufptr
++ = buf
[i
+ offset
];
1222 if (buf
[i
+ offset
] == '\000')
1224 nbytes_read
+= i
+ 1;
1231 nbytes_read
+= tlen
;
1240 struct target_section_table
*
1241 target_get_section_table (struct target_ops
*target
)
1243 struct target_ops
*t
;
1246 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1248 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1249 if (t
->to_get_section_table
!= NULL
)
1250 return (*t
->to_get_section_table
) (t
);
1255 /* Find a section containing ADDR. */
1257 struct target_section
*
1258 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1260 struct target_section_table
*table
= target_get_section_table (target
);
1261 struct target_section
*secp
;
1266 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1268 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1274 /* Read memory from the live target, even if currently inspecting a
1275 traceframe. The return is the same as that of target_read. */
1278 target_read_live_memory (enum target_object object
,
1279 ULONGEST memaddr
, gdb_byte
*myaddr
, LONGEST len
)
1282 struct cleanup
*cleanup
;
1284 /* Switch momentarily out of tfind mode so to access live memory.
1285 Note that this must not clear global state, such as the frame
1286 cache, which must still remain valid for the previous traceframe.
1287 We may be _building_ the frame cache at this point. */
1288 cleanup
= make_cleanup_restore_traceframe_number ();
1289 set_traceframe_number (-1);
1291 ret
= target_read (current_target
.beneath
, object
, NULL
,
1292 myaddr
, memaddr
, len
);
1294 do_cleanups (cleanup
);
1298 /* Using the set of read-only target sections of OPS, read live
1299 read-only memory. Note that the actual reads start from the
1300 top-most target again.
1302 For interface/parameters/return description see target.h,
1306 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1307 enum target_object object
,
1308 gdb_byte
*readbuf
, ULONGEST memaddr
,
1311 struct target_section
*secp
;
1312 struct target_section_table
*table
;
1314 secp
= target_section_by_addr (ops
, memaddr
);
1316 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1319 struct target_section
*p
;
1320 ULONGEST memend
= memaddr
+ len
;
1322 table
= target_get_section_table (ops
);
1324 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1326 if (memaddr
>= p
->addr
)
1328 if (memend
<= p
->endaddr
)
1330 /* Entire transfer is within this section. */
1331 return target_read_live_memory (object
, memaddr
,
1334 else if (memaddr
>= p
->endaddr
)
1336 /* This section ends before the transfer starts. */
1341 /* This section overlaps the transfer. Just do half. */
1342 len
= p
->endaddr
- memaddr
;
1343 return target_read_live_memory (object
, memaddr
,
1353 /* Perform a partial memory transfer.
1354 For docs see target.h, to_xfer_partial. */
1357 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1358 void *readbuf
, const void *writebuf
, ULONGEST memaddr
,
1363 struct mem_region
*region
;
1364 struct inferior
*inf
;
1366 /* Zero length requests are ok and require no work. */
1370 /* For accesses to unmapped overlay sections, read directly from
1371 files. Must do this first, as MEMADDR may need adjustment. */
1372 if (readbuf
!= NULL
&& overlay_debugging
)
1374 struct obj_section
*section
= find_pc_overlay (memaddr
);
1376 if (pc_in_unmapped_range (memaddr
, section
))
1378 struct target_section_table
*table
1379 = target_get_section_table (ops
);
1380 const char *section_name
= section
->the_bfd_section
->name
;
1382 memaddr
= overlay_mapped_address (memaddr
, section
);
1383 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1386 table
->sections_end
,
1391 /* Try the executable files, if "trust-readonly-sections" is set. */
1392 if (readbuf
!= NULL
&& trust_readonly
)
1394 struct target_section
*secp
;
1395 struct target_section_table
*table
;
1397 secp
= target_section_by_addr (ops
, memaddr
);
1399 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1402 table
= target_get_section_table (ops
);
1403 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1406 table
->sections_end
,
1411 /* If reading unavailable memory in the context of traceframes, and
1412 this address falls within a read-only section, fallback to
1413 reading from live memory. */
1414 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1416 VEC(mem_range_s
) *available
;
1418 /* If we fail to get the set of available memory, then the
1419 target does not support querying traceframe info, and so we
1420 attempt reading from the traceframe anyway (assuming the
1421 target implements the old QTro packet then). */
1422 if (traceframe_available_memory (&available
, memaddr
, len
))
1424 struct cleanup
*old_chain
;
1426 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1428 if (VEC_empty (mem_range_s
, available
)
1429 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1431 /* Don't read into the traceframe's available
1433 if (!VEC_empty (mem_range_s
, available
))
1435 LONGEST oldlen
= len
;
1437 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1438 gdb_assert (len
<= oldlen
);
1441 do_cleanups (old_chain
);
1443 /* This goes through the topmost target again. */
1444 res
= memory_xfer_live_readonly_partial (ops
, object
,
1445 readbuf
, memaddr
, len
);
1449 /* No use trying further, we know some memory starting
1450 at MEMADDR isn't available. */
1454 /* Don't try to read more than how much is available, in
1455 case the target implements the deprecated QTro packet to
1456 cater for older GDBs (the target's knowledge of read-only
1457 sections may be outdated by now). */
1458 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1460 do_cleanups (old_chain
);
1464 /* Try GDB's internal data cache. */
1465 region
= lookup_mem_region (memaddr
);
1466 /* region->hi == 0 means there's no upper bound. */
1467 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1470 reg_len
= region
->hi
- memaddr
;
1472 switch (region
->attrib
.mode
)
1475 if (writebuf
!= NULL
)
1480 if (readbuf
!= NULL
)
1485 /* We only support writing to flash during "load" for now. */
1486 if (writebuf
!= NULL
)
1487 error (_("Writing to flash memory forbidden in this context"));
1494 if (!ptid_equal (inferior_ptid
, null_ptid
))
1495 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1500 /* The dcache reads whole cache lines; that doesn't play well
1501 with reading from a trace buffer, because reading outside of
1502 the collected memory range fails. */
1503 && get_traceframe_number () == -1
1504 && (region
->attrib
.cache
1505 || (stack_cache_enabled_p
&& object
== TARGET_OBJECT_STACK_MEMORY
)))
1507 if (readbuf
!= NULL
)
1508 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
, readbuf
,
1511 /* FIXME drow/2006-08-09: If we're going to preserve const
1512 correctness dcache_xfer_memory should take readbuf and
1514 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
,
1521 if (readbuf
&& !show_memory_breakpoints
)
1522 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1527 /* If none of those methods found the memory we wanted, fall back
1528 to a target partial transfer. Normally a single call to
1529 to_xfer_partial is enough; if it doesn't recognize an object
1530 it will call the to_xfer_partial of the next target down.
1531 But for memory this won't do. Memory is the only target
1532 object which can be read from more than one valid target.
1533 A core file, for instance, could have some of memory but
1534 delegate other bits to the target below it. So, we must
1535 manually try all targets. */
1539 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1540 readbuf
, writebuf
, memaddr
, reg_len
);
1544 /* We want to continue past core files to executables, but not
1545 past a running target's memory. */
1546 if (ops
->to_has_all_memory (ops
))
1551 while (ops
!= NULL
);
1553 if (res
> 0 && readbuf
!= NULL
&& !show_memory_breakpoints
)
1554 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1556 /* Make sure the cache gets updated no matter what - if we are writing
1557 to the stack. Even if this write is not tagged as such, we still need
1558 to update the cache. */
1563 && !region
->attrib
.cache
1564 && stack_cache_enabled_p
1565 && object
!= TARGET_OBJECT_STACK_MEMORY
)
1567 dcache_update (target_dcache
, memaddr
, (void *) writebuf
, res
);
1570 /* If we still haven't got anything, return the last error. We
1576 restore_show_memory_breakpoints (void *arg
)
1578 show_memory_breakpoints
= (uintptr_t) arg
;
1582 make_show_memory_breakpoints_cleanup (int show
)
1584 int current
= show_memory_breakpoints
;
1586 show_memory_breakpoints
= show
;
1587 return make_cleanup (restore_show_memory_breakpoints
,
1588 (void *) (uintptr_t) current
);
1591 /* For docs see target.h, to_xfer_partial. */
1594 target_xfer_partial (struct target_ops
*ops
,
1595 enum target_object object
, const char *annex
,
1596 void *readbuf
, const void *writebuf
,
1597 ULONGEST offset
, LONGEST len
)
1601 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1603 if (writebuf
&& !may_write_memory
)
1604 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1605 core_addr_to_string_nz (offset
), plongest (len
));
1607 /* If this is a memory transfer, let the memory-specific code
1608 have a look at it instead. Memory transfers are more
1610 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
)
1611 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1612 writebuf
, offset
, len
);
1615 enum target_object raw_object
= object
;
1617 /* If this is a raw memory transfer, request the normal
1618 memory object from other layers. */
1619 if (raw_object
== TARGET_OBJECT_RAW_MEMORY
)
1620 raw_object
= TARGET_OBJECT_MEMORY
;
1622 retval
= ops
->to_xfer_partial (ops
, raw_object
, annex
, readbuf
,
1623 writebuf
, offset
, len
);
1628 const unsigned char *myaddr
= NULL
;
1630 fprintf_unfiltered (gdb_stdlog
,
1631 "%s:target_xfer_partial "
1632 "(%d, %s, %s, %s, %s, %s) = %s",
1635 (annex
? annex
: "(null)"),
1636 host_address_to_string (readbuf
),
1637 host_address_to_string (writebuf
),
1638 core_addr_to_string_nz (offset
),
1639 plongest (len
), plongest (retval
));
1645 if (retval
> 0 && myaddr
!= NULL
)
1649 fputs_unfiltered (", bytes =", gdb_stdlog
);
1650 for (i
= 0; i
< retval
; i
++)
1652 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1654 if (targetdebug
< 2 && i
> 0)
1656 fprintf_unfiltered (gdb_stdlog
, " ...");
1659 fprintf_unfiltered (gdb_stdlog
, "\n");
1662 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1666 fputc_unfiltered ('\n', gdb_stdlog
);
1671 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1672 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1673 if any error occurs.
1675 If an error occurs, no guarantee is made about the contents of the data at
1676 MYADDR. In particular, the caller should not depend upon partial reads
1677 filling the buffer with good data. There is no way for the caller to know
1678 how much good data might have been transfered anyway. Callers that can
1679 deal with partial reads should call target_read (which will retry until
1680 it makes no progress, and then return how much was transferred). */
1683 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1685 /* Dispatch to the topmost target, not the flattened current_target.
1686 Memory accesses check target->to_has_(all_)memory, and the
1687 flattened target doesn't inherit those. */
1688 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1689 myaddr
, memaddr
, len
) == len
)
1695 /* Like target_read_memory, but specify explicitly that this is a read from
1696 the target's stack. This may trigger different cache behavior. */
1699 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1701 /* Dispatch to the topmost target, not the flattened current_target.
1702 Memory accesses check target->to_has_(all_)memory, and the
1703 flattened target doesn't inherit those. */
1705 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1706 myaddr
, memaddr
, len
) == len
)
1712 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1713 Returns either 0 for success or an errno value if any error occurs.
1714 If an error occurs, no guarantee is made about how much data got written.
1715 Callers that can deal with partial writes should call target_write. */
1718 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
1720 /* Dispatch to the topmost target, not the flattened current_target.
1721 Memory accesses check target->to_has_(all_)memory, and the
1722 flattened target doesn't inherit those. */
1723 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1724 myaddr
, memaddr
, len
) == len
)
1730 /* Fetch the target's memory map. */
1733 target_memory_map (void)
1735 VEC(mem_region_s
) *result
;
1736 struct mem_region
*last_one
, *this_one
;
1738 struct target_ops
*t
;
1741 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1743 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1744 if (t
->to_memory_map
!= NULL
)
1750 result
= t
->to_memory_map (t
);
1754 qsort (VEC_address (mem_region_s
, result
),
1755 VEC_length (mem_region_s
, result
),
1756 sizeof (struct mem_region
), mem_region_cmp
);
1758 /* Check that regions do not overlap. Simultaneously assign
1759 a numbering for the "mem" commands to use to refer to
1762 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1764 this_one
->number
= ix
;
1766 if (last_one
&& last_one
->hi
> this_one
->lo
)
1768 warning (_("Overlapping regions in memory map: ignoring"));
1769 VEC_free (mem_region_s
, result
);
1772 last_one
= this_one
;
1779 target_flash_erase (ULONGEST address
, LONGEST length
)
1781 struct target_ops
*t
;
1783 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1784 if (t
->to_flash_erase
!= NULL
)
1787 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1788 hex_string (address
), phex (length
, 0));
1789 t
->to_flash_erase (t
, address
, length
);
1797 target_flash_done (void)
1799 struct target_ops
*t
;
1801 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1802 if (t
->to_flash_done
!= NULL
)
1805 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1806 t
->to_flash_done (t
);
1814 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1815 struct cmd_list_element
*c
, const char *value
)
1817 fprintf_filtered (file
,
1818 _("Mode for reading from readonly sections is %s.\n"),
1822 /* More generic transfers. */
1825 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1826 const char *annex
, gdb_byte
*readbuf
,
1827 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1829 if (object
== TARGET_OBJECT_MEMORY
1830 && ops
->deprecated_xfer_memory
!= NULL
)
1831 /* If available, fall back to the target's
1832 "deprecated_xfer_memory" method. */
1837 if (writebuf
!= NULL
)
1839 void *buffer
= xmalloc (len
);
1840 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1842 memcpy (buffer
, writebuf
, len
);
1843 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1844 1/*write*/, NULL
, ops
);
1845 do_cleanups (cleanup
);
1847 if (readbuf
!= NULL
)
1848 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1849 0/*read*/, NULL
, ops
);
1852 else if (xfered
== 0 && errno
== 0)
1853 /* "deprecated_xfer_memory" uses 0, cross checked against
1854 ERRNO as one indication of an error. */
1859 else if (ops
->beneath
!= NULL
)
1860 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1861 readbuf
, writebuf
, offset
, len
);
1866 /* The xfer_partial handler for the topmost target. Unlike the default,
1867 it does not need to handle memory specially; it just passes all
1868 requests down the stack. */
1871 current_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1872 const char *annex
, gdb_byte
*readbuf
,
1873 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1875 if (ops
->beneath
!= NULL
)
1876 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1877 readbuf
, writebuf
, offset
, len
);
1882 /* Target vector read/write partial wrapper functions. */
1885 target_read_partial (struct target_ops
*ops
,
1886 enum target_object object
,
1887 const char *annex
, gdb_byte
*buf
,
1888 ULONGEST offset
, LONGEST len
)
1890 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
);
1894 target_write_partial (struct target_ops
*ops
,
1895 enum target_object object
,
1896 const char *annex
, const gdb_byte
*buf
,
1897 ULONGEST offset
, LONGEST len
)
1899 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
);
1902 /* Wrappers to perform the full transfer. */
1904 /* For docs on target_read see target.h. */
1907 target_read (struct target_ops
*ops
,
1908 enum target_object object
,
1909 const char *annex
, gdb_byte
*buf
,
1910 ULONGEST offset
, LONGEST len
)
1914 while (xfered
< len
)
1916 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1917 (gdb_byte
*) buf
+ xfered
,
1918 offset
+ xfered
, len
- xfered
);
1920 /* Call an observer, notifying them of the xfer progress? */
1931 /** Assuming that the entire [begin, end) range of memory cannot be read,
1932 try to read whatever subrange is possible to read.
1934 The function results, in RESULT, either zero or one memory block.
1935 If there's a readable subrange at the beginning, it is completely
1936 read and returned. Any further readable subrange will not be read.
1937 Otherwise, if there's a readable subrange at the end, it will be
1938 completely read and returned. Any readable subranges before it (obviously,
1939 not starting at the beginning), will be ignored. In other cases --
1940 either no readable subrange, or readable subrange (s) that is neither
1941 at the beginning, or end, nothing is returned.
1943 The purpose of this function is to handle a read across a boundary of
1944 accessible memory in a case when memory map is not available. The above
1945 restrictions are fine for this case, but will give incorrect results if
1946 the memory is 'patchy'. However, supporting 'patchy' memory would require
1947 trying to read every single byte, and it seems unacceptable solution.
1948 Explicit memory map is recommended for this case -- and
1949 target_read_memory_robust will take care of reading multiple ranges
1953 read_whatever_is_readable (struct target_ops
*ops
,
1954 ULONGEST begin
, ULONGEST end
,
1955 VEC(memory_read_result_s
) **result
)
1957 gdb_byte
*buf
= xmalloc (end
-begin
);
1958 ULONGEST current_begin
= begin
;
1959 ULONGEST current_end
= end
;
1961 memory_read_result_s r
;
1963 /* If we previously failed to read 1 byte, nothing can be done here. */
1964 if (end
- begin
<= 1)
1967 /* Check that either first or the last byte is readable, and give up
1968 if not. This heuristic is meant to permit reading accessible memory
1969 at the boundary of accessible region. */
1970 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1971 buf
, begin
, 1) == 1)
1976 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1977 buf
+ (end
-begin
) - 1, end
- 1, 1) == 1)
1987 /* Loop invariant is that the [current_begin, current_end) was previously
1988 found to be not readable as a whole.
1990 Note loop condition -- if the range has 1 byte, we can't divide the range
1991 so there's no point trying further. */
1992 while (current_end
- current_begin
> 1)
1994 ULONGEST first_half_begin
, first_half_end
;
1995 ULONGEST second_half_begin
, second_half_end
;
1998 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2001 first_half_begin
= current_begin
;
2002 first_half_end
= middle
;
2003 second_half_begin
= middle
;
2004 second_half_end
= current_end
;
2008 first_half_begin
= middle
;
2009 first_half_end
= current_end
;
2010 second_half_begin
= current_begin
;
2011 second_half_end
= middle
;
2014 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2015 buf
+ (first_half_begin
- begin
),
2017 first_half_end
- first_half_begin
);
2019 if (xfer
== first_half_end
- first_half_begin
)
2021 /* This half reads up fine. So, the error must be in the
2023 current_begin
= second_half_begin
;
2024 current_end
= second_half_end
;
2028 /* This half is not readable. Because we've tried one byte, we
2029 know some part of this half if actually redable. Go to the next
2030 iteration to divide again and try to read.
2032 We don't handle the other half, because this function only tries
2033 to read a single readable subrange. */
2034 current_begin
= first_half_begin
;
2035 current_end
= first_half_end
;
2041 /* The [begin, current_begin) range has been read. */
2043 r
.end
= current_begin
;
2048 /* The [current_end, end) range has been read. */
2049 LONGEST rlen
= end
- current_end
;
2050 r
.data
= xmalloc (rlen
);
2051 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2052 r
.begin
= current_end
;
2056 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2060 free_memory_read_result_vector (void *x
)
2062 VEC(memory_read_result_s
) *v
= x
;
2063 memory_read_result_s
*current
;
2066 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2068 xfree (current
->data
);
2070 VEC_free (memory_read_result_s
, v
);
2073 VEC(memory_read_result_s
) *
2074 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2076 VEC(memory_read_result_s
) *result
= 0;
2079 while (xfered
< len
)
2081 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2084 /* If there is no explicit region, a fake one should be created. */
2085 gdb_assert (region
);
2087 if (region
->hi
== 0)
2088 rlen
= len
- xfered
;
2090 rlen
= region
->hi
- offset
;
2092 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2094 /* Cannot read this region. Note that we can end up here only
2095 if the region is explicitly marked inaccessible, or
2096 'inaccessible-by-default' is in effect. */
2101 LONGEST to_read
= min (len
- xfered
, rlen
);
2102 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2104 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2105 (gdb_byte
*) buffer
,
2106 offset
+ xfered
, to_read
);
2107 /* Call an observer, notifying them of the xfer progress? */
2110 /* Got an error reading full chunk. See if maybe we can read
2113 read_whatever_is_readable (ops
, offset
+ xfered
,
2114 offset
+ xfered
+ to_read
, &result
);
2119 struct memory_read_result r
;
2121 r
.begin
= offset
+ xfered
;
2122 r
.end
= r
.begin
+ xfer
;
2123 VEC_safe_push (memory_read_result_s
, result
, &r
);
2133 /* An alternative to target_write with progress callbacks. */
2136 target_write_with_progress (struct target_ops
*ops
,
2137 enum target_object object
,
2138 const char *annex
, const gdb_byte
*buf
,
2139 ULONGEST offset
, LONGEST len
,
2140 void (*progress
) (ULONGEST
, void *), void *baton
)
2144 /* Give the progress callback a chance to set up. */
2146 (*progress
) (0, baton
);
2148 while (xfered
< len
)
2150 LONGEST xfer
= target_write_partial (ops
, object
, annex
,
2151 (gdb_byte
*) buf
+ xfered
,
2152 offset
+ xfered
, len
- xfered
);
2160 (*progress
) (xfer
, baton
);
2168 /* For docs on target_write see target.h. */
2171 target_write (struct target_ops
*ops
,
2172 enum target_object object
,
2173 const char *annex
, const gdb_byte
*buf
,
2174 ULONGEST offset
, LONGEST len
)
2176 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2180 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2181 the size of the transferred data. PADDING additional bytes are
2182 available in *BUF_P. This is a helper function for
2183 target_read_alloc; see the declaration of that function for more
2187 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2188 const char *annex
, gdb_byte
**buf_p
, int padding
)
2190 size_t buf_alloc
, buf_pos
;
2194 /* This function does not have a length parameter; it reads the
2195 entire OBJECT). Also, it doesn't support objects fetched partly
2196 from one target and partly from another (in a different stratum,
2197 e.g. a core file and an executable). Both reasons make it
2198 unsuitable for reading memory. */
2199 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2201 /* Start by reading up to 4K at a time. The target will throttle
2202 this number down if necessary. */
2204 buf
= xmalloc (buf_alloc
);
2208 n
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2209 buf_pos
, buf_alloc
- buf_pos
- padding
);
2212 /* An error occurred. */
2218 /* Read all there was. */
2228 /* If the buffer is filling up, expand it. */
2229 if (buf_alloc
< buf_pos
* 2)
2232 buf
= xrealloc (buf
, buf_alloc
);
2239 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2240 the size of the transferred data. See the declaration in "target.h"
2241 function for more information about the return value. */
2244 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2245 const char *annex
, gdb_byte
**buf_p
)
2247 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2250 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2251 returned as a string, allocated using xmalloc. If an error occurs
2252 or the transfer is unsupported, NULL is returned. Empty objects
2253 are returned as allocated but empty strings. A warning is issued
2254 if the result contains any embedded NUL bytes. */
2257 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2261 LONGEST transferred
;
2263 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2265 if (transferred
< 0)
2268 if (transferred
== 0)
2269 return xstrdup ("");
2271 buffer
[transferred
] = 0;
2272 if (strlen (buffer
) < transferred
)
2273 warning (_("target object %d, annex %s, "
2274 "contained unexpected null characters"),
2275 (int) object
, annex
? annex
: "(none)");
2277 return (char *) buffer
;
2280 /* Memory transfer methods. */
2283 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2286 /* This method is used to read from an alternate, non-current
2287 target. This read must bypass the overlay support (as symbols
2288 don't match this target), and GDB's internal cache (wrong cache
2289 for this target). */
2290 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2292 memory_error (EIO
, addr
);
2296 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2297 int len
, enum bfd_endian byte_order
)
2299 gdb_byte buf
[sizeof (ULONGEST
)];
2301 gdb_assert (len
<= sizeof (buf
));
2302 get_target_memory (ops
, addr
, buf
, len
);
2303 return extract_unsigned_integer (buf
, len
, byte_order
);
2307 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2308 struct bp_target_info
*bp_tgt
)
2310 if (!may_insert_breakpoints
)
2312 warning (_("May not insert breakpoints"));
2316 return (*current_target
.to_insert_breakpoint
) (gdbarch
, bp_tgt
);
2320 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2321 struct bp_target_info
*bp_tgt
)
2323 /* This is kind of a weird case to handle, but the permission might
2324 have been changed after breakpoints were inserted - in which case
2325 we should just take the user literally and assume that any
2326 breakpoints should be left in place. */
2327 if (!may_insert_breakpoints
)
2329 warning (_("May not remove breakpoints"));
2333 return (*current_target
.to_remove_breakpoint
) (gdbarch
, bp_tgt
);
2337 target_info (char *args
, int from_tty
)
2339 struct target_ops
*t
;
2340 int has_all_mem
= 0;
2342 if (symfile_objfile
!= NULL
)
2343 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile
->name
);
2345 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2347 if (!(*t
->to_has_memory
) (t
))
2350 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2353 printf_unfiltered (_("\tWhile running this, "
2354 "GDB does not access memory from...\n"));
2355 printf_unfiltered ("%s:\n", t
->to_longname
);
2356 (t
->to_files_info
) (t
);
2357 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2361 /* This function is called before any new inferior is created, e.g.
2362 by running a program, attaching, or connecting to a target.
2363 It cleans up any state from previous invocations which might
2364 change between runs. This is a subset of what target_preopen
2365 resets (things which might change between targets). */
2368 target_pre_inferior (int from_tty
)
2370 /* Clear out solib state. Otherwise the solib state of the previous
2371 inferior might have survived and is entirely wrong for the new
2372 target. This has been observed on GNU/Linux using glibc 2.3. How
2384 Cannot access memory at address 0xdeadbeef
2387 /* In some OSs, the shared library list is the same/global/shared
2388 across inferiors. If code is shared between processes, so are
2389 memory regions and features. */
2390 if (!gdbarch_has_global_solist (target_gdbarch
))
2392 no_shared_libraries (NULL
, from_tty
);
2394 invalidate_target_mem_regions ();
2396 target_clear_description ();
2400 /* Callback for iterate_over_inferiors. Gets rid of the given
2404 dispose_inferior (struct inferior
*inf
, void *args
)
2406 struct thread_info
*thread
;
2408 thread
= any_thread_of_process (inf
->pid
);
2411 switch_to_thread (thread
->ptid
);
2413 /* Core inferiors actually should be detached, not killed. */
2414 if (target_has_execution
)
2417 target_detach (NULL
, 0);
2423 /* This is to be called by the open routine before it does
2427 target_preopen (int from_tty
)
2431 if (have_inferiors ())
2434 || !have_live_inferiors ()
2435 || query (_("A program is being debugged already. Kill it? ")))
2436 iterate_over_inferiors (dispose_inferior
, NULL
);
2438 error (_("Program not killed."));
2441 /* Calling target_kill may remove the target from the stack. But if
2442 it doesn't (which seems like a win for UDI), remove it now. */
2443 /* Leave the exec target, though. The user may be switching from a
2444 live process to a core of the same program. */
2445 pop_all_targets_above (file_stratum
, 0);
2447 target_pre_inferior (from_tty
);
2450 /* Detach a target after doing deferred register stores. */
2453 target_detach (char *args
, int from_tty
)
2455 struct target_ops
* t
;
2457 if (gdbarch_has_global_breakpoints (target_gdbarch
))
2458 /* Don't remove global breakpoints here. They're removed on
2459 disconnection from the target. */
2462 /* If we're in breakpoints-always-inserted mode, have to remove
2463 them before detaching. */
2464 remove_breakpoints_pid (PIDGET (inferior_ptid
));
2466 prepare_for_detach ();
2468 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2470 if (t
->to_detach
!= NULL
)
2472 t
->to_detach (t
, args
, from_tty
);
2474 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2480 internal_error (__FILE__
, __LINE__
, _("could not find a target to detach"));
2484 target_disconnect (char *args
, int from_tty
)
2486 struct target_ops
*t
;
2488 /* If we're in breakpoints-always-inserted mode or if breakpoints
2489 are global across processes, we have to remove them before
2491 remove_breakpoints ();
2493 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2494 if (t
->to_disconnect
!= NULL
)
2497 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2499 t
->to_disconnect (t
, args
, from_tty
);
2507 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2509 struct target_ops
*t
;
2511 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2513 if (t
->to_wait
!= NULL
)
2515 ptid_t retval
= (*t
->to_wait
) (t
, ptid
, status
, options
);
2519 char *status_string
;
2521 status_string
= target_waitstatus_to_string (status
);
2522 fprintf_unfiltered (gdb_stdlog
,
2523 "target_wait (%d, status) = %d, %s\n",
2524 PIDGET (ptid
), PIDGET (retval
),
2526 xfree (status_string
);
2537 target_pid_to_str (ptid_t ptid
)
2539 struct target_ops
*t
;
2541 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2543 if (t
->to_pid_to_str
!= NULL
)
2544 return (*t
->to_pid_to_str
) (t
, ptid
);
2547 return normal_pid_to_str (ptid
);
2551 target_thread_name (struct thread_info
*info
)
2553 struct target_ops
*t
;
2555 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2557 if (t
->to_thread_name
!= NULL
)
2558 return (*t
->to_thread_name
) (info
);
2565 target_resume (ptid_t ptid
, int step
, enum target_signal signal
)
2567 struct target_ops
*t
;
2569 target_dcache_invalidate ();
2571 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2573 if (t
->to_resume
!= NULL
)
2575 t
->to_resume (t
, ptid
, step
, signal
);
2577 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2579 step
? "step" : "continue",
2580 target_signal_to_name (signal
));
2582 registers_changed_ptid (ptid
);
2583 set_executing (ptid
, 1);
2584 set_running (ptid
, 1);
2585 clear_inline_frame_state (ptid
);
2592 /* Look through the list of possible targets for a target that can
2596 target_follow_fork (int follow_child
)
2598 struct target_ops
*t
;
2600 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2602 if (t
->to_follow_fork
!= NULL
)
2604 int retval
= t
->to_follow_fork (t
, follow_child
);
2607 fprintf_unfiltered (gdb_stdlog
, "target_follow_fork (%d) = %d\n",
2608 follow_child
, retval
);
2613 /* Some target returned a fork event, but did not know how to follow it. */
2614 internal_error (__FILE__
, __LINE__
,
2615 _("could not find a target to follow fork"));
2619 target_mourn_inferior (void)
2621 struct target_ops
*t
;
2623 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2625 if (t
->to_mourn_inferior
!= NULL
)
2627 t
->to_mourn_inferior (t
);
2629 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2631 /* We no longer need to keep handles on any of the object files.
2632 Make sure to release them to avoid unnecessarily locking any
2633 of them while we're not actually debugging. */
2634 bfd_cache_close_all ();
2640 internal_error (__FILE__
, __LINE__
,
2641 _("could not find a target to follow mourn inferior"));
2644 /* Look for a target which can describe architectural features, starting
2645 from TARGET. If we find one, return its description. */
2647 const struct target_desc
*
2648 target_read_description (struct target_ops
*target
)
2650 struct target_ops
*t
;
2652 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2653 if (t
->to_read_description
!= NULL
)
2655 const struct target_desc
*tdesc
;
2657 tdesc
= t
->to_read_description (t
);
2665 /* The default implementation of to_search_memory.
2666 This implements a basic search of memory, reading target memory and
2667 performing the search here (as opposed to performing the search in on the
2668 target side with, for example, gdbserver). */
2671 simple_search_memory (struct target_ops
*ops
,
2672 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2673 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2674 CORE_ADDR
*found_addrp
)
2676 /* NOTE: also defined in find.c testcase. */
2677 #define SEARCH_CHUNK_SIZE 16000
2678 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2679 /* Buffer to hold memory contents for searching. */
2680 gdb_byte
*search_buf
;
2681 unsigned search_buf_size
;
2682 struct cleanup
*old_cleanups
;
2684 search_buf_size
= chunk_size
+ pattern_len
- 1;
2686 /* No point in trying to allocate a buffer larger than the search space. */
2687 if (search_space_len
< search_buf_size
)
2688 search_buf_size
= search_space_len
;
2690 search_buf
= malloc (search_buf_size
);
2691 if (search_buf
== NULL
)
2692 error (_("Unable to allocate memory to perform the search."));
2693 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2695 /* Prime the search buffer. */
2697 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2698 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2700 warning (_("Unable to access target memory at %s, halting search."),
2701 hex_string (start_addr
));
2702 do_cleanups (old_cleanups
);
2706 /* Perform the search.
2708 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2709 When we've scanned N bytes we copy the trailing bytes to the start and
2710 read in another N bytes. */
2712 while (search_space_len
>= pattern_len
)
2714 gdb_byte
*found_ptr
;
2715 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2717 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2718 pattern
, pattern_len
);
2720 if (found_ptr
!= NULL
)
2722 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2724 *found_addrp
= found_addr
;
2725 do_cleanups (old_cleanups
);
2729 /* Not found in this chunk, skip to next chunk. */
2731 /* Don't let search_space_len wrap here, it's unsigned. */
2732 if (search_space_len
>= chunk_size
)
2733 search_space_len
-= chunk_size
;
2735 search_space_len
= 0;
2737 if (search_space_len
>= pattern_len
)
2739 unsigned keep_len
= search_buf_size
- chunk_size
;
2740 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2743 /* Copy the trailing part of the previous iteration to the front
2744 of the buffer for the next iteration. */
2745 gdb_assert (keep_len
== pattern_len
- 1);
2746 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2748 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2750 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2751 search_buf
+ keep_len
, read_addr
,
2752 nr_to_read
) != nr_to_read
)
2754 warning (_("Unable to access target "
2755 "memory at %s, halting search."),
2756 hex_string (read_addr
));
2757 do_cleanups (old_cleanups
);
2761 start_addr
+= chunk_size
;
2767 do_cleanups (old_cleanups
);
2771 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2772 sequence of bytes in PATTERN with length PATTERN_LEN.
2774 The result is 1 if found, 0 if not found, and -1 if there was an error
2775 requiring halting of the search (e.g. memory read error).
2776 If the pattern is found the address is recorded in FOUND_ADDRP. */
2779 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2780 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2781 CORE_ADDR
*found_addrp
)
2783 struct target_ops
*t
;
2786 /* We don't use INHERIT to set current_target.to_search_memory,
2787 so we have to scan the target stack and handle targetdebug
2791 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2792 hex_string (start_addr
));
2794 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2795 if (t
->to_search_memory
!= NULL
)
2800 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2801 pattern
, pattern_len
, found_addrp
);
2805 /* If a special version of to_search_memory isn't available, use the
2807 found
= simple_search_memory (current_target
.beneath
,
2808 start_addr
, search_space_len
,
2809 pattern
, pattern_len
, found_addrp
);
2813 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2818 /* Look through the currently pushed targets. If none of them will
2819 be able to restart the currently running process, issue an error
2823 target_require_runnable (void)
2825 struct target_ops
*t
;
2827 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2829 /* If this target knows how to create a new program, then
2830 assume we will still be able to after killing the current
2831 one. Either killing and mourning will not pop T, or else
2832 find_default_run_target will find it again. */
2833 if (t
->to_create_inferior
!= NULL
)
2836 /* Do not worry about thread_stratum targets that can not
2837 create inferiors. Assume they will be pushed again if
2838 necessary, and continue to the process_stratum. */
2839 if (t
->to_stratum
== thread_stratum
2840 || t
->to_stratum
== arch_stratum
)
2843 error (_("The \"%s\" target does not support \"run\". "
2844 "Try \"help target\" or \"continue\"."),
2848 /* This function is only called if the target is running. In that
2849 case there should have been a process_stratum target and it
2850 should either know how to create inferiors, or not... */
2851 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2854 /* Look through the list of possible targets for a target that can
2855 execute a run or attach command without any other data. This is
2856 used to locate the default process stratum.
2858 If DO_MESG is not NULL, the result is always valid (error() is
2859 called for errors); else, return NULL on error. */
2861 static struct target_ops
*
2862 find_default_run_target (char *do_mesg
)
2864 struct target_ops
**t
;
2865 struct target_ops
*runable
= NULL
;
2870 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2873 if ((*t
)->to_can_run
&& target_can_run (*t
))
2883 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2892 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
2894 struct target_ops
*t
;
2896 t
= find_default_run_target ("attach");
2897 (t
->to_attach
) (t
, args
, from_tty
);
2902 find_default_create_inferior (struct target_ops
*ops
,
2903 char *exec_file
, char *allargs
, char **env
,
2906 struct target_ops
*t
;
2908 t
= find_default_run_target ("run");
2909 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
2914 find_default_can_async_p (void)
2916 struct target_ops
*t
;
2918 /* This may be called before the target is pushed on the stack;
2919 look for the default process stratum. If there's none, gdb isn't
2920 configured with a native debugger, and target remote isn't
2922 t
= find_default_run_target (NULL
);
2923 if (t
&& t
->to_can_async_p
)
2924 return (t
->to_can_async_p
) ();
2929 find_default_is_async_p (void)
2931 struct target_ops
*t
;
2933 /* This may be called before the target is pushed on the stack;
2934 look for the default process stratum. If there's none, gdb isn't
2935 configured with a native debugger, and target remote isn't
2937 t
= find_default_run_target (NULL
);
2938 if (t
&& t
->to_is_async_p
)
2939 return (t
->to_is_async_p
) ();
2944 find_default_supports_non_stop (void)
2946 struct target_ops
*t
;
2948 t
= find_default_run_target (NULL
);
2949 if (t
&& t
->to_supports_non_stop
)
2950 return (t
->to_supports_non_stop
) ();
2955 target_supports_non_stop (void)
2957 struct target_ops
*t
;
2959 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2960 if (t
->to_supports_non_stop
)
2961 return t
->to_supports_non_stop ();
2968 target_get_osdata (const char *type
)
2970 struct target_ops
*t
;
2972 /* If we're already connected to something that can get us OS
2973 related data, use it. Otherwise, try using the native
2975 if (current_target
.to_stratum
>= process_stratum
)
2976 t
= current_target
.beneath
;
2978 t
= find_default_run_target ("get OS data");
2983 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2986 /* Determine the current address space of thread PTID. */
2988 struct address_space
*
2989 target_thread_address_space (ptid_t ptid
)
2991 struct address_space
*aspace
;
2992 struct inferior
*inf
;
2993 struct target_ops
*t
;
2995 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2997 if (t
->to_thread_address_space
!= NULL
)
2999 aspace
= t
->to_thread_address_space (t
, ptid
);
3000 gdb_assert (aspace
);
3003 fprintf_unfiltered (gdb_stdlog
,
3004 "target_thread_address_space (%s) = %d\n",
3005 target_pid_to_str (ptid
),
3006 address_space_num (aspace
));
3011 /* Fall-back to the "main" address space of the inferior. */
3012 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3014 if (inf
== NULL
|| inf
->aspace
== NULL
)
3015 internal_error (__FILE__
, __LINE__
,
3016 _("Can't determine the current "
3017 "address space of thread %s\n"),
3018 target_pid_to_str (ptid
));
3024 default_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3026 return (len
<= gdbarch_ptr_bit (target_gdbarch
) / TARGET_CHAR_BIT
);
3030 default_watchpoint_addr_within_range (struct target_ops
*target
,
3032 CORE_ADDR start
, int length
)
3034 return addr
>= start
&& addr
< start
+ length
;
3037 static struct gdbarch
*
3038 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3040 return target_gdbarch
;
3056 return_minus_one (void)
3061 /* Find a single runnable target in the stack and return it. If for
3062 some reason there is more than one, return NULL. */
3065 find_run_target (void)
3067 struct target_ops
**t
;
3068 struct target_ops
*runable
= NULL
;
3073 for (t
= target_structs
; t
< target_structs
+ target_struct_size
; ++t
)
3075 if ((*t
)->to_can_run
&& target_can_run (*t
))
3082 return (count
== 1 ? runable
: NULL
);
3086 * Find the next target down the stack from the specified target.
3090 find_target_beneath (struct target_ops
*t
)
3096 /* The inferior process has died. Long live the inferior! */
3099 generic_mourn_inferior (void)
3103 ptid
= inferior_ptid
;
3104 inferior_ptid
= null_ptid
;
3106 if (!ptid_equal (ptid
, null_ptid
))
3108 int pid
= ptid_get_pid (ptid
);
3109 exit_inferior (pid
);
3112 breakpoint_init_inferior (inf_exited
);
3113 registers_changed ();
3115 reopen_exec_file ();
3116 reinit_frame_cache ();
3118 if (deprecated_detach_hook
)
3119 deprecated_detach_hook ();
3122 /* Helper function for child_wait and the derivatives of child_wait.
3123 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3124 translation of that in OURSTATUS. */
3126 store_waitstatus (struct target_waitstatus
*ourstatus
, int hoststatus
)
3128 if (WIFEXITED (hoststatus
))
3130 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
3131 ourstatus
->value
.integer
= WEXITSTATUS (hoststatus
);
3133 else if (!WIFSTOPPED (hoststatus
))
3135 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3136 ourstatus
->value
.sig
= target_signal_from_host (WTERMSIG (hoststatus
));
3140 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
3141 ourstatus
->value
.sig
= target_signal_from_host (WSTOPSIG (hoststatus
));
3145 /* Convert a normal process ID to a string. Returns the string in a
3149 normal_pid_to_str (ptid_t ptid
)
3151 static char buf
[32];
3153 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3158 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3160 return normal_pid_to_str (ptid
);
3163 /* Error-catcher for target_find_memory_regions. */
3165 dummy_find_memory_regions (find_memory_region_ftype ignore1
, void *ignore2
)
3167 error (_("Command not implemented for this target."));
3171 /* Error-catcher for target_make_corefile_notes. */
3173 dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
3175 error (_("Command not implemented for this target."));
3179 /* Error-catcher for target_get_bookmark. */
3181 dummy_get_bookmark (char *ignore1
, int ignore2
)
3187 /* Error-catcher for target_goto_bookmark. */
3189 dummy_goto_bookmark (gdb_byte
*ignore
, int from_tty
)
3194 /* Set up the handful of non-empty slots needed by the dummy target
3198 init_dummy_target (void)
3200 dummy_target
.to_shortname
= "None";
3201 dummy_target
.to_longname
= "None";
3202 dummy_target
.to_doc
= "";
3203 dummy_target
.to_attach
= find_default_attach
;
3204 dummy_target
.to_detach
=
3205 (void (*)(struct target_ops
*, char *, int))target_ignore
;
3206 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3207 dummy_target
.to_can_async_p
= find_default_can_async_p
;
3208 dummy_target
.to_is_async_p
= find_default_is_async_p
;
3209 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3210 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3211 dummy_target
.to_stratum
= dummy_stratum
;
3212 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
3213 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
3214 dummy_target
.to_get_bookmark
= dummy_get_bookmark
;
3215 dummy_target
.to_goto_bookmark
= dummy_goto_bookmark
;
3216 dummy_target
.to_xfer_partial
= default_xfer_partial
;
3217 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3218 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3219 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3220 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3221 dummy_target
.to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
3222 dummy_target
.to_stopped_by_watchpoint
= return_zero
;
3223 dummy_target
.to_stopped_data_address
=
3224 (int (*) (struct target_ops
*, CORE_ADDR
*)) return_zero
;
3225 dummy_target
.to_magic
= OPS_MAGIC
;
3229 debug_to_open (char *args
, int from_tty
)
3231 debug_target
.to_open (args
, from_tty
);
3233 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3237 target_close (struct target_ops
*targ
, int quitting
)
3239 if (targ
->to_xclose
!= NULL
)
3240 targ
->to_xclose (targ
, quitting
);
3241 else if (targ
->to_close
!= NULL
)
3242 targ
->to_close (quitting
);
3245 fprintf_unfiltered (gdb_stdlog
, "target_close (%d)\n", quitting
);
3249 target_attach (char *args
, int from_tty
)
3251 struct target_ops
*t
;
3253 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3255 if (t
->to_attach
!= NULL
)
3257 t
->to_attach (t
, args
, from_tty
);
3259 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3265 internal_error (__FILE__
, __LINE__
,
3266 _("could not find a target to attach"));
3270 target_thread_alive (ptid_t ptid
)
3272 struct target_ops
*t
;
3274 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3276 if (t
->to_thread_alive
!= NULL
)
3280 retval
= t
->to_thread_alive (t
, ptid
);
3282 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3283 PIDGET (ptid
), retval
);
3293 target_find_new_threads (void)
3295 struct target_ops
*t
;
3297 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3299 if (t
->to_find_new_threads
!= NULL
)
3301 t
->to_find_new_threads (t
);
3303 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3311 target_stop (ptid_t ptid
)
3315 warning (_("May not interrupt or stop the target, ignoring attempt"));
3319 (*current_target
.to_stop
) (ptid
);
3323 debug_to_post_attach (int pid
)
3325 debug_target
.to_post_attach (pid
);
3327 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3330 /* Return a pretty printed form of target_waitstatus.
3331 Space for the result is malloc'd, caller must free. */
3334 target_waitstatus_to_string (const struct target_waitstatus
*ws
)
3336 const char *kind_str
= "status->kind = ";
3340 case TARGET_WAITKIND_EXITED
:
3341 return xstrprintf ("%sexited, status = %d",
3342 kind_str
, ws
->value
.integer
);
3343 case TARGET_WAITKIND_STOPPED
:
3344 return xstrprintf ("%sstopped, signal = %s",
3345 kind_str
, target_signal_to_name (ws
->value
.sig
));
3346 case TARGET_WAITKIND_SIGNALLED
:
3347 return xstrprintf ("%ssignalled, signal = %s",
3348 kind_str
, target_signal_to_name (ws
->value
.sig
));
3349 case TARGET_WAITKIND_LOADED
:
3350 return xstrprintf ("%sloaded", kind_str
);
3351 case TARGET_WAITKIND_FORKED
:
3352 return xstrprintf ("%sforked", kind_str
);
3353 case TARGET_WAITKIND_VFORKED
:
3354 return xstrprintf ("%svforked", kind_str
);
3355 case TARGET_WAITKIND_EXECD
:
3356 return xstrprintf ("%sexecd", kind_str
);
3357 case TARGET_WAITKIND_SYSCALL_ENTRY
:
3358 return xstrprintf ("%sentered syscall", kind_str
);
3359 case TARGET_WAITKIND_SYSCALL_RETURN
:
3360 return xstrprintf ("%sexited syscall", kind_str
);
3361 case TARGET_WAITKIND_SPURIOUS
:
3362 return xstrprintf ("%sspurious", kind_str
);
3363 case TARGET_WAITKIND_IGNORE
:
3364 return xstrprintf ("%signore", kind_str
);
3365 case TARGET_WAITKIND_NO_HISTORY
:
3366 return xstrprintf ("%sno-history", kind_str
);
3368 return xstrprintf ("%sunknown???", kind_str
);
3373 debug_print_register (const char * func
,
3374 struct regcache
*regcache
, int regno
)
3376 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3378 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3379 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3380 && gdbarch_register_name (gdbarch
, regno
) != NULL
3381 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3382 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3383 gdbarch_register_name (gdbarch
, regno
));
3385 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3386 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3388 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3389 int i
, size
= register_size (gdbarch
, regno
);
3390 unsigned char buf
[MAX_REGISTER_SIZE
];
3392 regcache_raw_collect (regcache
, regno
, buf
);
3393 fprintf_unfiltered (gdb_stdlog
, " = ");
3394 for (i
= 0; i
< size
; i
++)
3396 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3398 if (size
<= sizeof (LONGEST
))
3400 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3402 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3403 core_addr_to_string_nz (val
), plongest (val
));
3406 fprintf_unfiltered (gdb_stdlog
, "\n");
3410 target_fetch_registers (struct regcache
*regcache
, int regno
)
3412 struct target_ops
*t
;
3414 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3416 if (t
->to_fetch_registers
!= NULL
)
3418 t
->to_fetch_registers (t
, regcache
, regno
);
3420 debug_print_register ("target_fetch_registers", regcache
, regno
);
3427 target_store_registers (struct regcache
*regcache
, int regno
)
3429 struct target_ops
*t
;
3431 if (!may_write_registers
)
3432 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3434 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3436 if (t
->to_store_registers
!= NULL
)
3438 t
->to_store_registers (t
, regcache
, regno
);
3441 debug_print_register ("target_store_registers", regcache
, regno
);
3451 target_core_of_thread (ptid_t ptid
)
3453 struct target_ops
*t
;
3455 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3457 if (t
->to_core_of_thread
!= NULL
)
3459 int retval
= t
->to_core_of_thread (t
, ptid
);
3462 fprintf_unfiltered (gdb_stdlog
,
3463 "target_core_of_thread (%d) = %d\n",
3464 PIDGET (ptid
), retval
);
3473 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3475 struct target_ops
*t
;
3477 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3479 if (t
->to_verify_memory
!= NULL
)
3481 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3484 fprintf_unfiltered (gdb_stdlog
,
3485 "target_verify_memory (%s, %s) = %d\n",
3486 paddress (target_gdbarch
, memaddr
),
3497 debug_to_prepare_to_store (struct regcache
*regcache
)
3499 debug_target
.to_prepare_to_store (regcache
);
3501 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
3505 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
3506 int write
, struct mem_attrib
*attrib
,
3507 struct target_ops
*target
)
3511 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
3514 fprintf_unfiltered (gdb_stdlog
,
3515 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3516 paddress (target_gdbarch
, memaddr
), len
,
3517 write
? "write" : "read", retval
);
3523 fputs_unfiltered (", bytes =", gdb_stdlog
);
3524 for (i
= 0; i
< retval
; i
++)
3526 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
3528 if (targetdebug
< 2 && i
> 0)
3530 fprintf_unfiltered (gdb_stdlog
, " ...");
3533 fprintf_unfiltered (gdb_stdlog
, "\n");
3536 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
3540 fputc_unfiltered ('\n', gdb_stdlog
);
3546 debug_to_files_info (struct target_ops
*target
)
3548 debug_target
.to_files_info (target
);
3550 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3554 debug_to_insert_breakpoint (struct gdbarch
*gdbarch
,
3555 struct bp_target_info
*bp_tgt
)
3559 retval
= debug_target
.to_insert_breakpoint (gdbarch
, bp_tgt
);
3561 fprintf_unfiltered (gdb_stdlog
,
3562 "target_insert_breakpoint (%s, xxx) = %ld\n",
3563 core_addr_to_string (bp_tgt
->placed_address
),
3564 (unsigned long) retval
);
3569 debug_to_remove_breakpoint (struct gdbarch
*gdbarch
,
3570 struct bp_target_info
*bp_tgt
)
3574 retval
= debug_target
.to_remove_breakpoint (gdbarch
, bp_tgt
);
3576 fprintf_unfiltered (gdb_stdlog
,
3577 "target_remove_breakpoint (%s, xxx) = %ld\n",
3578 core_addr_to_string (bp_tgt
->placed_address
),
3579 (unsigned long) retval
);
3584 debug_to_can_use_hw_breakpoint (int type
, int cnt
, int from_tty
)
3588 retval
= debug_target
.to_can_use_hw_breakpoint (type
, cnt
, from_tty
);
3590 fprintf_unfiltered (gdb_stdlog
,
3591 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3592 (unsigned long) type
,
3593 (unsigned long) cnt
,
3594 (unsigned long) from_tty
,
3595 (unsigned long) retval
);
3600 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3604 retval
= debug_target
.to_region_ok_for_hw_watchpoint (addr
, len
);
3606 fprintf_unfiltered (gdb_stdlog
,
3607 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3608 core_addr_to_string (addr
), (unsigned long) len
,
3609 core_addr_to_string (retval
));
3614 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int rw
,
3615 struct expression
*cond
)
3619 retval
= debug_target
.to_can_accel_watchpoint_condition (addr
, len
,
3622 fprintf_unfiltered (gdb_stdlog
,
3623 "target_can_accel_watchpoint_condition "
3624 "(%s, %d, %d, %s) = %ld\n",
3625 core_addr_to_string (addr
), len
, rw
,
3626 host_address_to_string (cond
), (unsigned long) retval
);
3631 debug_to_stopped_by_watchpoint (void)
3635 retval
= debug_target
.to_stopped_by_watchpoint ();
3637 fprintf_unfiltered (gdb_stdlog
,
3638 "target_stopped_by_watchpoint () = %ld\n",
3639 (unsigned long) retval
);
3644 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3648 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3650 fprintf_unfiltered (gdb_stdlog
,
3651 "target_stopped_data_address ([%s]) = %ld\n",
3652 core_addr_to_string (*addr
),
3653 (unsigned long)retval
);
3658 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3660 CORE_ADDR start
, int length
)
3664 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3667 fprintf_filtered (gdb_stdlog
,
3668 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3669 core_addr_to_string (addr
), core_addr_to_string (start
),
3675 debug_to_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
3676 struct bp_target_info
*bp_tgt
)
3680 retval
= debug_target
.to_insert_hw_breakpoint (gdbarch
, bp_tgt
);
3682 fprintf_unfiltered (gdb_stdlog
,
3683 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3684 core_addr_to_string (bp_tgt
->placed_address
),
3685 (unsigned long) retval
);
3690 debug_to_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
3691 struct bp_target_info
*bp_tgt
)
3695 retval
= debug_target
.to_remove_hw_breakpoint (gdbarch
, bp_tgt
);
3697 fprintf_unfiltered (gdb_stdlog
,
3698 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3699 core_addr_to_string (bp_tgt
->placed_address
),
3700 (unsigned long) retval
);
3705 debug_to_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
3706 struct expression
*cond
)
3710 retval
= debug_target
.to_insert_watchpoint (addr
, len
, type
, cond
);
3712 fprintf_unfiltered (gdb_stdlog
,
3713 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3714 core_addr_to_string (addr
), len
, type
,
3715 host_address_to_string (cond
), (unsigned long) retval
);
3720 debug_to_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
3721 struct expression
*cond
)
3725 retval
= debug_target
.to_remove_watchpoint (addr
, len
, type
, cond
);
3727 fprintf_unfiltered (gdb_stdlog
,
3728 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3729 core_addr_to_string (addr
), len
, type
,
3730 host_address_to_string (cond
), (unsigned long) retval
);
3735 debug_to_terminal_init (void)
3737 debug_target
.to_terminal_init ();
3739 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3743 debug_to_terminal_inferior (void)
3745 debug_target
.to_terminal_inferior ();
3747 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3751 debug_to_terminal_ours_for_output (void)
3753 debug_target
.to_terminal_ours_for_output ();
3755 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3759 debug_to_terminal_ours (void)
3761 debug_target
.to_terminal_ours ();
3763 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3767 debug_to_terminal_save_ours (void)
3769 debug_target
.to_terminal_save_ours ();
3771 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3775 debug_to_terminal_info (char *arg
, int from_tty
)
3777 debug_target
.to_terminal_info (arg
, from_tty
);
3779 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3784 debug_to_load (char *args
, int from_tty
)
3786 debug_target
.to_load (args
, from_tty
);
3788 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3792 debug_to_lookup_symbol (char *name
, CORE_ADDR
*addrp
)
3796 retval
= debug_target
.to_lookup_symbol (name
, addrp
);
3798 fprintf_unfiltered (gdb_stdlog
, "target_lookup_symbol (%s, xxx)\n", name
);
3804 debug_to_post_startup_inferior (ptid_t ptid
)
3806 debug_target
.to_post_startup_inferior (ptid
);
3808 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3813 debug_to_insert_fork_catchpoint (int pid
)
3817 retval
= debug_target
.to_insert_fork_catchpoint (pid
);
3819 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
3826 debug_to_remove_fork_catchpoint (int pid
)
3830 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
3832 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3839 debug_to_insert_vfork_catchpoint (int pid
)
3843 retval
= debug_target
.to_insert_vfork_catchpoint (pid
);
3845 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
3852 debug_to_remove_vfork_catchpoint (int pid
)
3856 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
3858 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3865 debug_to_insert_exec_catchpoint (int pid
)
3869 retval
= debug_target
.to_insert_exec_catchpoint (pid
);
3871 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
3878 debug_to_remove_exec_catchpoint (int pid
)
3882 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
3884 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3891 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
3895 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
3897 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3898 pid
, wait_status
, *exit_status
, has_exited
);
3904 debug_to_can_run (void)
3908 retval
= debug_target
.to_can_run ();
3910 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3916 debug_to_notice_signals (ptid_t ptid
)
3918 debug_target
.to_notice_signals (ptid
);
3920 fprintf_unfiltered (gdb_stdlog
, "target_notice_signals (%d)\n",
3924 static struct gdbarch
*
3925 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3927 struct gdbarch
*retval
;
3929 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3931 fprintf_unfiltered (gdb_stdlog
,
3932 "target_thread_architecture (%s) = %s [%s]\n",
3933 target_pid_to_str (ptid
),
3934 host_address_to_string (retval
),
3935 gdbarch_bfd_arch_info (retval
)->printable_name
);
3940 debug_to_stop (ptid_t ptid
)
3942 debug_target
.to_stop (ptid
);
3944 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
3945 target_pid_to_str (ptid
));
3949 debug_to_rcmd (char *command
,
3950 struct ui_file
*outbuf
)
3952 debug_target
.to_rcmd (command
, outbuf
);
3953 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
3957 debug_to_pid_to_exec_file (int pid
)
3961 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
3963 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
3970 setup_target_debug (void)
3972 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3974 current_target
.to_open
= debug_to_open
;
3975 current_target
.to_post_attach
= debug_to_post_attach
;
3976 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
3977 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
3978 current_target
.to_files_info
= debug_to_files_info
;
3979 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
3980 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
3981 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
3982 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
3983 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
3984 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
3985 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
3986 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
3987 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
3988 current_target
.to_watchpoint_addr_within_range
3989 = debug_to_watchpoint_addr_within_range
;
3990 current_target
.to_region_ok_for_hw_watchpoint
3991 = debug_to_region_ok_for_hw_watchpoint
;
3992 current_target
.to_can_accel_watchpoint_condition
3993 = debug_to_can_accel_watchpoint_condition
;
3994 current_target
.to_terminal_init
= debug_to_terminal_init
;
3995 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
3996 current_target
.to_terminal_ours_for_output
3997 = debug_to_terminal_ours_for_output
;
3998 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
3999 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4000 current_target
.to_terminal_info
= debug_to_terminal_info
;
4001 current_target
.to_load
= debug_to_load
;
4002 current_target
.to_lookup_symbol
= debug_to_lookup_symbol
;
4003 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4004 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4005 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4006 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4007 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4008 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4009 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4010 current_target
.to_has_exited
= debug_to_has_exited
;
4011 current_target
.to_can_run
= debug_to_can_run
;
4012 current_target
.to_notice_signals
= debug_to_notice_signals
;
4013 current_target
.to_stop
= debug_to_stop
;
4014 current_target
.to_rcmd
= debug_to_rcmd
;
4015 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4016 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4020 static char targ_desc
[] =
4021 "Names of targets and files being debugged.\nShows the entire \
4022 stack of targets currently in use (including the exec-file,\n\
4023 core-file, and process, if any), as well as the symbol file name.";
4026 do_monitor_command (char *cmd
,
4029 if ((current_target
.to_rcmd
4030 == (void (*) (char *, struct ui_file
*)) tcomplain
)
4031 || (current_target
.to_rcmd
== debug_to_rcmd
4032 && (debug_target
.to_rcmd
4033 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
4034 error (_("\"monitor\" command not supported by this target."));
4035 target_rcmd (cmd
, gdb_stdtarg
);
4038 /* Print the name of each layers of our target stack. */
4041 maintenance_print_target_stack (char *cmd
, int from_tty
)
4043 struct target_ops
*t
;
4045 printf_filtered (_("The current target stack is:\n"));
4047 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4049 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4053 /* Controls if async mode is permitted. */
4054 int target_async_permitted
= 0;
4056 /* The set command writes to this variable. If the inferior is
4057 executing, linux_nat_async_permitted is *not* updated. */
4058 static int target_async_permitted_1
= 0;
4061 set_maintenance_target_async_permitted (char *args
, int from_tty
,
4062 struct cmd_list_element
*c
)
4064 if (have_live_inferiors ())
4066 target_async_permitted_1
= target_async_permitted
;
4067 error (_("Cannot change this setting while the inferior is running."));
4070 target_async_permitted
= target_async_permitted_1
;
4074 show_maintenance_target_async_permitted (struct ui_file
*file
, int from_tty
,
4075 struct cmd_list_element
*c
,
4078 fprintf_filtered (file
,
4079 _("Controlling the inferior in "
4080 "asynchronous mode is %s.\n"), value
);
4083 /* Temporary copies of permission settings. */
4085 static int may_write_registers_1
= 1;
4086 static int may_write_memory_1
= 1;
4087 static int may_insert_breakpoints_1
= 1;
4088 static int may_insert_tracepoints_1
= 1;
4089 static int may_insert_fast_tracepoints_1
= 1;
4090 static int may_stop_1
= 1;
4092 /* Make the user-set values match the real values again. */
4095 update_target_permissions (void)
4097 may_write_registers_1
= may_write_registers
;
4098 may_write_memory_1
= may_write_memory
;
4099 may_insert_breakpoints_1
= may_insert_breakpoints
;
4100 may_insert_tracepoints_1
= may_insert_tracepoints
;
4101 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4102 may_stop_1
= may_stop
;
4105 /* The one function handles (most of) the permission flags in the same
4109 set_target_permissions (char *args
, int from_tty
,
4110 struct cmd_list_element
*c
)
4112 if (target_has_execution
)
4114 update_target_permissions ();
4115 error (_("Cannot change this setting while the inferior is running."));
4118 /* Make the real values match the user-changed values. */
4119 may_write_registers
= may_write_registers_1
;
4120 may_insert_breakpoints
= may_insert_breakpoints_1
;
4121 may_insert_tracepoints
= may_insert_tracepoints_1
;
4122 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4123 may_stop
= may_stop_1
;
4124 update_observer_mode ();
4127 /* Set memory write permission independently of observer mode. */
4130 set_write_memory_permission (char *args
, int from_tty
,
4131 struct cmd_list_element
*c
)
4133 /* Make the real values match the user-changed values. */
4134 may_write_memory
= may_write_memory_1
;
4135 update_observer_mode ();
4140 initialize_targets (void)
4142 init_dummy_target ();
4143 push_target (&dummy_target
);
4145 add_info ("target", target_info
, targ_desc
);
4146 add_info ("files", target_info
, targ_desc
);
4148 add_setshow_zinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4149 Set target debugging."), _("\
4150 Show target debugging."), _("\
4151 When non-zero, target debugging is enabled. Higher numbers are more\n\
4152 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4156 &setdebuglist
, &showdebuglist
);
4158 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4159 &trust_readonly
, _("\
4160 Set mode for reading from readonly sections."), _("\
4161 Show mode for reading from readonly sections."), _("\
4162 When this mode is on, memory reads from readonly sections (such as .text)\n\
4163 will be read from the object file instead of from the target. This will\n\
4164 result in significant performance improvement for remote targets."),
4166 show_trust_readonly
,
4167 &setlist
, &showlist
);
4169 add_com ("monitor", class_obscure
, do_monitor_command
,
4170 _("Send a command to the remote monitor (remote targets only)."));
4172 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4173 _("Print the name of each layer of the internal target stack."),
4174 &maintenanceprintlist
);
4176 add_setshow_boolean_cmd ("target-async", no_class
,
4177 &target_async_permitted_1
, _("\
4178 Set whether gdb controls the inferior in asynchronous mode."), _("\
4179 Show whether gdb controls the inferior in asynchronous mode."), _("\
4180 Tells gdb whether to control the inferior in asynchronous mode."),
4181 set_maintenance_target_async_permitted
,
4182 show_maintenance_target_async_permitted
,
4186 add_setshow_boolean_cmd ("stack-cache", class_support
,
4187 &stack_cache_enabled_p_1
, _("\
4188 Set cache use for stack access."), _("\
4189 Show cache use for stack access."), _("\
4190 When on, use the data cache for all stack access, regardless of any\n\
4191 configured memory regions. This improves remote performance significantly.\n\
4192 By default, caching for stack access is on."),
4193 set_stack_cache_enabled_p
,
4194 show_stack_cache_enabled_p
,
4195 &setlist
, &showlist
);
4197 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4198 &may_write_registers_1
, _("\
4199 Set permission to write into registers."), _("\
4200 Show permission to write into registers."), _("\
4201 When this permission is on, GDB may write into the target's registers.\n\
4202 Otherwise, any sort of write attempt will result in an error."),
4203 set_target_permissions
, NULL
,
4204 &setlist
, &showlist
);
4206 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4207 &may_write_memory_1
, _("\
4208 Set permission to write into target memory."), _("\
4209 Show permission to write into target memory."), _("\
4210 When this permission is on, GDB may write into the target's memory.\n\
4211 Otherwise, any sort of write attempt will result in an error."),
4212 set_write_memory_permission
, NULL
,
4213 &setlist
, &showlist
);
4215 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4216 &may_insert_breakpoints_1
, _("\
4217 Set permission to insert breakpoints in the target."), _("\
4218 Show permission to insert breakpoints in the target."), _("\
4219 When this permission is on, GDB may insert breakpoints in the program.\n\
4220 Otherwise, any sort of insertion attempt will result in an error."),
4221 set_target_permissions
, NULL
,
4222 &setlist
, &showlist
);
4224 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4225 &may_insert_tracepoints_1
, _("\
4226 Set permission to insert tracepoints in the target."), _("\
4227 Show permission to insert tracepoints in the target."), _("\
4228 When this permission is on, GDB may insert tracepoints in the program.\n\
4229 Otherwise, any sort of insertion attempt will result in an error."),
4230 set_target_permissions
, NULL
,
4231 &setlist
, &showlist
);
4233 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4234 &may_insert_fast_tracepoints_1
, _("\
4235 Set permission to insert fast tracepoints in the target."), _("\
4236 Show permission to insert fast tracepoints in the target."), _("\
4237 When this permission is on, GDB may insert fast tracepoints.\n\
4238 Otherwise, any sort of insertion attempt will result in an error."),
4239 set_target_permissions
, NULL
,
4240 &setlist
, &showlist
);
4242 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4244 Set permission to interrupt or signal the target."), _("\
4245 Show permission to interrupt or signal the target."), _("\
4246 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4247 Otherwise, any attempt to interrupt or stop will be ignored."),
4248 set_target_permissions
, NULL
,
4249 &setlist
, &showlist
);
4252 target_dcache
= dcache_init ();