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
, ptid_t the_ptid
)
319 /* If there's no thread selected, then we can't make it run through
321 if (ptid_equal (the_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 (ptid_t the_ptid
)
379 struct target_ops
*t
;
381 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
382 if (t
->to_has_execution (t
, the_ptid
))
389 target_has_execution_current (void)
391 return target_has_execution_1 (inferior_ptid
);
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops
*t
)
399 /* Provide default values for all "must have" methods. */
400 if (t
->to_xfer_partial
== NULL
)
401 t
->to_xfer_partial
= default_xfer_partial
;
403 if (t
->to_has_all_memory
== NULL
)
404 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
406 if (t
->to_has_memory
== NULL
)
407 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
409 if (t
->to_has_stack
== NULL
)
410 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
412 if (t
->to_has_registers
== NULL
)
413 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
415 if (t
->to_has_execution
== NULL
)
416 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
420 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
421 target_structs
= (struct target_ops
**) xmalloc
422 (target_struct_allocsize
* sizeof (*target_structs
));
424 if (target_struct_size
>= target_struct_allocsize
)
426 target_struct_allocsize
*= 2;
427 target_structs
= (struct target_ops
**)
428 xrealloc ((char *) target_structs
,
429 target_struct_allocsize
* sizeof (*target_structs
));
431 target_structs
[target_struct_size
++] = t
;
433 if (targetlist
== NULL
)
434 add_prefix_cmd ("target", class_run
, target_command
, _("\
435 Connect to a target machine or process.\n\
436 The first argument is the type or protocol of the target machine.\n\
437 Remaining arguments are interpreted by the target protocol. For more\n\
438 information on the arguments for a particular protocol, type\n\
439 `help target ' followed by the protocol name."),
440 &targetlist
, "target ", 0, &cmdlist
);
441 add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
454 struct target_ops
*t
;
456 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
457 if (t
->to_kill
!= NULL
)
460 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
470 target_load (char *arg
, int from_tty
)
472 target_dcache_invalidate ();
473 (*current_target
.to_load
) (arg
, from_tty
);
477 target_create_inferior (char *exec_file
, char *args
,
478 char **env
, int from_tty
)
480 struct target_ops
*t
;
482 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
484 if (t
->to_create_inferior
!= NULL
)
486 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
488 fprintf_unfiltered (gdb_stdlog
,
489 "target_create_inferior (%s, %s, xxx, %d)\n",
490 exec_file
, args
, from_tty
);
495 internal_error (__FILE__
, __LINE__
,
496 _("could not find a target to create inferior"));
500 target_terminal_inferior (void)
502 /* A background resume (``run&'') should leave GDB in control of the
503 terminal. Use target_can_async_p, not target_is_async_p, since at
504 this point the target is not async yet. However, if sync_execution
505 is not set, we know it will become async prior to resume. */
506 if (target_can_async_p () && !sync_execution
)
509 /* If GDB is resuming the inferior in the foreground, install
510 inferior's terminal modes. */
511 (*current_target
.to_terminal_inferior
) ();
515 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
516 struct target_ops
*t
)
518 errno
= EIO
; /* Can't read/write this location. */
519 return 0; /* No bytes handled. */
525 error (_("You can't do that when your target is `%s'"),
526 current_target
.to_shortname
);
532 error (_("You can't do that without a process to debug."));
536 nosymbol (char *name
, CORE_ADDR
*addrp
)
538 return 1; /* Symbol does not exist in target env. */
542 default_terminal_info (char *args
, int from_tty
)
544 printf_unfiltered (_("No saved terminal information.\n"));
547 /* A default implementation for the to_get_ada_task_ptid target method.
549 This function builds the PTID by using both LWP and TID as part of
550 the PTID lwp and tid elements. The pid used is the pid of the
554 default_get_ada_task_ptid (long lwp
, long tid
)
556 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops
*t
;
576 /* First, reset current's contents. */
577 memset (¤t_target
, 0, sizeof (current_target
));
579 #define INHERIT(FIELD, TARGET) \
580 if (!current_target.FIELD) \
581 current_target.FIELD = (TARGET)->FIELD
583 for (t
= target_stack
; t
; t
= t
->beneath
)
585 INHERIT (to_shortname
, t
);
586 INHERIT (to_longname
, t
);
588 /* Do not inherit to_open. */
589 /* Do not inherit to_close. */
590 /* Do not inherit to_attach. */
591 INHERIT (to_post_attach
, t
);
592 INHERIT (to_attach_no_wait
, t
);
593 /* Do not inherit to_detach. */
594 /* Do not inherit to_disconnect. */
595 /* Do not inherit to_resume. */
596 /* Do not inherit to_wait. */
597 /* Do not inherit to_fetch_registers. */
598 /* Do not inherit to_store_registers. */
599 INHERIT (to_prepare_to_store
, t
);
600 INHERIT (deprecated_xfer_memory
, t
);
601 INHERIT (to_files_info
, t
);
602 INHERIT (to_insert_breakpoint
, t
);
603 INHERIT (to_remove_breakpoint
, t
);
604 INHERIT (to_can_use_hw_breakpoint
, t
);
605 INHERIT (to_insert_hw_breakpoint
, t
);
606 INHERIT (to_remove_hw_breakpoint
, t
);
607 INHERIT (to_insert_watchpoint
, t
);
608 INHERIT (to_remove_watchpoint
, t
);
609 INHERIT (to_stopped_data_address
, t
);
610 INHERIT (to_have_steppable_watchpoint
, t
);
611 INHERIT (to_have_continuable_watchpoint
, t
);
612 INHERIT (to_stopped_by_watchpoint
, t
);
613 INHERIT (to_watchpoint_addr_within_range
, t
);
614 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
615 INHERIT (to_can_accel_watchpoint_condition
, t
);
616 INHERIT (to_terminal_init
, t
);
617 INHERIT (to_terminal_inferior
, t
);
618 INHERIT (to_terminal_ours_for_output
, t
);
619 INHERIT (to_terminal_ours
, t
);
620 INHERIT (to_terminal_save_ours
, t
);
621 INHERIT (to_terminal_info
, t
);
622 /* Do not inherit to_kill. */
623 INHERIT (to_load
, t
);
624 INHERIT (to_lookup_symbol
, t
);
625 /* Do no inherit to_create_inferior. */
626 INHERIT (to_post_startup_inferior
, t
);
627 INHERIT (to_insert_fork_catchpoint
, t
);
628 INHERIT (to_remove_fork_catchpoint
, t
);
629 INHERIT (to_insert_vfork_catchpoint
, t
);
630 INHERIT (to_remove_vfork_catchpoint
, t
);
631 /* Do not inherit to_follow_fork. */
632 INHERIT (to_insert_exec_catchpoint
, t
);
633 INHERIT (to_remove_exec_catchpoint
, t
);
634 INHERIT (to_set_syscall_catchpoint
, t
);
635 INHERIT (to_has_exited
, t
);
636 /* Do not inherit to_mourn_inferior. */
637 INHERIT (to_can_run
, t
);
638 INHERIT (to_notice_signals
, t
);
639 /* Do not inherit to_thread_alive. */
640 /* Do not inherit to_find_new_threads. */
641 /* Do not inherit to_pid_to_str. */
642 INHERIT (to_extra_thread_info
, t
);
643 INHERIT (to_thread_name
, t
);
644 INHERIT (to_stop
, t
);
645 /* Do not inherit to_xfer_partial. */
646 INHERIT (to_rcmd
, t
);
647 INHERIT (to_pid_to_exec_file
, t
);
648 INHERIT (to_log_command
, t
);
649 INHERIT (to_stratum
, t
);
650 /* Do not inherit to_has_all_memory. */
651 /* Do not inherit to_has_memory. */
652 /* Do not inherit to_has_stack. */
653 /* Do not inherit to_has_registers. */
654 /* Do not inherit to_has_execution. */
655 INHERIT (to_has_thread_control
, t
);
656 INHERIT (to_can_async_p
, t
);
657 INHERIT (to_is_async_p
, t
);
658 INHERIT (to_async
, t
);
659 INHERIT (to_async_mask
, t
);
660 INHERIT (to_find_memory_regions
, t
);
661 INHERIT (to_make_corefile_notes
, t
);
662 INHERIT (to_get_bookmark
, t
);
663 INHERIT (to_goto_bookmark
, t
);
664 /* Do not inherit to_get_thread_local_address. */
665 INHERIT (to_can_execute_reverse
, t
);
666 INHERIT (to_thread_architecture
, t
);
667 /* Do not inherit to_read_description. */
668 INHERIT (to_get_ada_task_ptid
, t
);
669 /* Do not inherit to_search_memory. */
670 INHERIT (to_supports_multi_process
, t
);
671 INHERIT (to_trace_init
, t
);
672 INHERIT (to_download_tracepoint
, t
);
673 INHERIT (to_download_trace_state_variable
, t
);
674 INHERIT (to_trace_set_readonly_regions
, t
);
675 INHERIT (to_trace_start
, t
);
676 INHERIT (to_get_trace_status
, t
);
677 INHERIT (to_trace_stop
, t
);
678 INHERIT (to_trace_find
, t
);
679 INHERIT (to_get_trace_state_variable_value
, t
);
680 INHERIT (to_save_trace_data
, t
);
681 INHERIT (to_upload_tracepoints
, t
);
682 INHERIT (to_upload_trace_state_variables
, t
);
683 INHERIT (to_get_raw_trace_data
, t
);
684 INHERIT (to_set_disconnected_tracing
, t
);
685 INHERIT (to_set_circular_trace_buffer
, t
);
686 INHERIT (to_get_tib_address
, t
);
687 INHERIT (to_set_permissions
, t
);
688 INHERIT (to_static_tracepoint_marker_at
, t
);
689 INHERIT (to_static_tracepoint_markers_by_strid
, t
);
690 INHERIT (to_traceframe_info
, t
);
691 INHERIT (to_magic
, t
);
692 /* Do not inherit to_memory_map. */
693 /* Do not inherit to_flash_erase. */
694 /* Do not inherit to_flash_done. */
698 /* Clean up a target struct so it no longer has any zero pointers in
699 it. Some entries are defaulted to a method that print an error,
700 others are hard-wired to a standard recursive default. */
702 #define de_fault(field, value) \
703 if (!current_target.field) \
704 current_target.field = value
707 (void (*) (char *, int))
712 de_fault (to_post_attach
,
715 de_fault (to_prepare_to_store
,
716 (void (*) (struct regcache
*))
718 de_fault (deprecated_xfer_memory
,
719 (int (*) (CORE_ADDR
, gdb_byte
*, int, int,
720 struct mem_attrib
*, struct target_ops
*))
722 de_fault (to_files_info
,
723 (void (*) (struct target_ops
*))
725 de_fault (to_insert_breakpoint
,
726 memory_insert_breakpoint
);
727 de_fault (to_remove_breakpoint
,
728 memory_remove_breakpoint
);
729 de_fault (to_can_use_hw_breakpoint
,
730 (int (*) (int, int, int))
732 de_fault (to_insert_hw_breakpoint
,
733 (int (*) (struct gdbarch
*, struct bp_target_info
*))
735 de_fault (to_remove_hw_breakpoint
,
736 (int (*) (struct gdbarch
*, struct bp_target_info
*))
738 de_fault (to_insert_watchpoint
,
739 (int (*) (CORE_ADDR
, int, int, struct expression
*))
741 de_fault (to_remove_watchpoint
,
742 (int (*) (CORE_ADDR
, int, int, struct expression
*))
744 de_fault (to_stopped_by_watchpoint
,
747 de_fault (to_stopped_data_address
,
748 (int (*) (struct target_ops
*, CORE_ADDR
*))
750 de_fault (to_watchpoint_addr_within_range
,
751 default_watchpoint_addr_within_range
);
752 de_fault (to_region_ok_for_hw_watchpoint
,
753 default_region_ok_for_hw_watchpoint
);
754 de_fault (to_can_accel_watchpoint_condition
,
755 (int (*) (CORE_ADDR
, int, int, struct expression
*))
757 de_fault (to_terminal_init
,
760 de_fault (to_terminal_inferior
,
763 de_fault (to_terminal_ours_for_output
,
766 de_fault (to_terminal_ours
,
769 de_fault (to_terminal_save_ours
,
772 de_fault (to_terminal_info
,
773 default_terminal_info
);
775 (void (*) (char *, int))
777 de_fault (to_lookup_symbol
,
778 (int (*) (char *, CORE_ADDR
*))
780 de_fault (to_post_startup_inferior
,
783 de_fault (to_insert_fork_catchpoint
,
786 de_fault (to_remove_fork_catchpoint
,
789 de_fault (to_insert_vfork_catchpoint
,
792 de_fault (to_remove_vfork_catchpoint
,
795 de_fault (to_insert_exec_catchpoint
,
798 de_fault (to_remove_exec_catchpoint
,
801 de_fault (to_set_syscall_catchpoint
,
802 (int (*) (int, int, int, int, int *))
804 de_fault (to_has_exited
,
805 (int (*) (int, int, int *))
807 de_fault (to_can_run
,
809 de_fault (to_notice_signals
,
812 de_fault (to_extra_thread_info
,
813 (char *(*) (struct thread_info
*))
815 de_fault (to_thread_name
,
816 (char *(*) (struct thread_info
*))
821 current_target
.to_xfer_partial
= current_xfer_partial
;
823 (void (*) (char *, struct ui_file
*))
825 de_fault (to_pid_to_exec_file
,
829 (void (*) (void (*) (enum inferior_event_type
, void*), void*))
831 de_fault (to_async_mask
,
834 de_fault (to_thread_architecture
,
835 default_thread_architecture
);
836 current_target
.to_read_description
= NULL
;
837 de_fault (to_get_ada_task_ptid
,
838 (ptid_t (*) (long, long))
839 default_get_ada_task_ptid
);
840 de_fault (to_supports_multi_process
,
843 de_fault (to_trace_init
,
846 de_fault (to_download_tracepoint
,
847 (void (*) (struct breakpoint
*))
849 de_fault (to_download_trace_state_variable
,
850 (void (*) (struct trace_state_variable
*))
852 de_fault (to_trace_set_readonly_regions
,
855 de_fault (to_trace_start
,
858 de_fault (to_get_trace_status
,
859 (int (*) (struct trace_status
*))
861 de_fault (to_trace_stop
,
864 de_fault (to_trace_find
,
865 (int (*) (enum trace_find_type
, int, ULONGEST
, ULONGEST
, int *))
867 de_fault (to_get_trace_state_variable_value
,
868 (int (*) (int, LONGEST
*))
870 de_fault (to_save_trace_data
,
871 (int (*) (const char *))
873 de_fault (to_upload_tracepoints
,
874 (int (*) (struct uploaded_tp
**))
876 de_fault (to_upload_trace_state_variables
,
877 (int (*) (struct uploaded_tsv
**))
879 de_fault (to_get_raw_trace_data
,
880 (LONGEST (*) (gdb_byte
*, ULONGEST
, LONGEST
))
882 de_fault (to_set_disconnected_tracing
,
885 de_fault (to_set_circular_trace_buffer
,
888 de_fault (to_get_tib_address
,
889 (int (*) (ptid_t
, CORE_ADDR
*))
891 de_fault (to_set_permissions
,
894 de_fault (to_static_tracepoint_marker_at
,
895 (int (*) (CORE_ADDR
, struct static_tracepoint_marker
*))
897 de_fault (to_static_tracepoint_markers_by_strid
,
898 (VEC(static_tracepoint_marker_p
) * (*) (const char *))
900 de_fault (to_traceframe_info
,
901 (struct traceframe_info
* (*) (void))
905 /* Finally, position the target-stack beneath the squashed
906 "current_target". That way code looking for a non-inherited
907 target method can quickly and simply find it. */
908 current_target
.beneath
= target_stack
;
911 setup_target_debug ();
914 /* Push a new target type into the stack of the existing target accessors,
915 possibly superseding some of the existing accessors.
917 Rather than allow an empty stack, we always have the dummy target at
918 the bottom stratum, so we can call the function vectors without
922 push_target (struct target_ops
*t
)
924 struct target_ops
**cur
;
926 /* Check magic number. If wrong, it probably means someone changed
927 the struct definition, but not all the places that initialize one. */
928 if (t
->to_magic
!= OPS_MAGIC
)
930 fprintf_unfiltered (gdb_stderr
,
931 "Magic number of %s target struct wrong\n",
933 internal_error (__FILE__
, __LINE__
,
934 _("failed internal consistency check"));
937 /* Find the proper stratum to install this target in. */
938 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
940 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
944 /* If there's already targets at this stratum, remove them. */
945 /* FIXME: cagney/2003-10-15: I think this should be popping all
946 targets to CUR, and not just those at this stratum level. */
947 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
949 /* There's already something at this stratum level. Close it,
950 and un-hook it from the stack. */
951 struct target_ops
*tmp
= (*cur
);
953 (*cur
) = (*cur
)->beneath
;
955 target_close (tmp
, 0);
958 /* We have removed all targets in our stratum, now add the new one. */
962 update_current_target ();
965 /* Remove a target_ops vector from the stack, wherever it may be.
966 Return how many times it was removed (0 or 1). */
969 unpush_target (struct target_ops
*t
)
971 struct target_ops
**cur
;
972 struct target_ops
*tmp
;
974 if (t
->to_stratum
== dummy_stratum
)
975 internal_error (__FILE__
, __LINE__
,
976 _("Attempt to unpush the dummy target"));
978 /* Look for the specified target. Note that we assume that a target
979 can only occur once in the target stack. */
981 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
988 return 0; /* Didn't find target_ops, quit now. */
990 /* NOTE: cagney/2003-12-06: In '94 the close call was made
991 unconditional by moving it to before the above check that the
992 target was in the target stack (something about "Change the way
993 pushing and popping of targets work to support target overlays
994 and inheritance"). This doesn't make much sense - only open
995 targets should be closed. */
998 /* Unchain the target. */
1000 (*cur
) = (*cur
)->beneath
;
1001 tmp
->beneath
= NULL
;
1003 update_current_target ();
1011 target_close (target_stack
, 0); /* Let it clean up. */
1012 if (unpush_target (target_stack
) == 1)
1015 fprintf_unfiltered (gdb_stderr
,
1016 "pop_target couldn't find target %s\n",
1017 current_target
.to_shortname
);
1018 internal_error (__FILE__
, __LINE__
,
1019 _("failed internal consistency check"));
1023 pop_all_targets_above (enum strata above_stratum
, int quitting
)
1025 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
1027 target_close (target_stack
, quitting
);
1028 if (!unpush_target (target_stack
))
1030 fprintf_unfiltered (gdb_stderr
,
1031 "pop_all_targets couldn't find target %s\n",
1032 target_stack
->to_shortname
);
1033 internal_error (__FILE__
, __LINE__
,
1034 _("failed internal consistency check"));
1041 pop_all_targets (int quitting
)
1043 pop_all_targets_above (dummy_stratum
, quitting
);
1046 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1049 target_is_pushed (struct target_ops
*t
)
1051 struct target_ops
**cur
;
1053 /* Check magic number. If wrong, it probably means someone changed
1054 the struct definition, but not all the places that initialize one. */
1055 if (t
->to_magic
!= OPS_MAGIC
)
1057 fprintf_unfiltered (gdb_stderr
,
1058 "Magic number of %s target struct wrong\n",
1060 internal_error (__FILE__
, __LINE__
,
1061 _("failed internal consistency check"));
1064 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1071 /* Using the objfile specified in OBJFILE, find the address for the
1072 current thread's thread-local storage with offset OFFSET. */
1074 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1076 volatile CORE_ADDR addr
= 0;
1077 struct target_ops
*target
;
1079 for (target
= current_target
.beneath
;
1081 target
= target
->beneath
)
1083 if (target
->to_get_thread_local_address
!= NULL
)
1088 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch
))
1090 ptid_t ptid
= inferior_ptid
;
1091 volatile struct gdb_exception ex
;
1093 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1097 /* Fetch the load module address for this objfile. */
1098 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch
,
1100 /* If it's 0, throw the appropriate exception. */
1102 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1103 _("TLS load module not found"));
1105 addr
= target
->to_get_thread_local_address (target
, ptid
,
1108 /* If an error occurred, print TLS related messages here. Otherwise,
1109 throw the error to some higher catcher. */
1112 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1116 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1117 error (_("Cannot find thread-local variables "
1118 "in this thread library."));
1120 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1121 if (objfile_is_library
)
1122 error (_("Cannot find shared library `%s' in dynamic"
1123 " linker's load module list"), objfile
->name
);
1125 error (_("Cannot find executable file `%s' in dynamic"
1126 " linker's load module list"), objfile
->name
);
1128 case TLS_NOT_ALLOCATED_YET_ERROR
:
1129 if (objfile_is_library
)
1130 error (_("The inferior has not yet allocated storage for"
1131 " thread-local variables in\n"
1132 "the shared library `%s'\n"
1134 objfile
->name
, target_pid_to_str (ptid
));
1136 error (_("The inferior has not yet allocated storage for"
1137 " thread-local variables in\n"
1138 "the executable `%s'\n"
1140 objfile
->name
, target_pid_to_str (ptid
));
1142 case TLS_GENERIC_ERROR
:
1143 if (objfile_is_library
)
1144 error (_("Cannot find thread-local storage for %s, "
1145 "shared library %s:\n%s"),
1146 target_pid_to_str (ptid
),
1147 objfile
->name
, ex
.message
);
1149 error (_("Cannot find thread-local storage for %s, "
1150 "executable file %s:\n%s"),
1151 target_pid_to_str (ptid
),
1152 objfile
->name
, ex
.message
);
1155 throw_exception (ex
);
1160 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1161 TLS is an ABI-specific thing. But we don't do that yet. */
1163 error (_("Cannot find thread-local variables on this target"));
1169 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1171 /* target_read_string -- read a null terminated string, up to LEN bytes,
1172 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1173 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1174 is responsible for freeing it. Return the number of bytes successfully
1178 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1180 int tlen
, origlen
, offset
, i
;
1184 int buffer_allocated
;
1186 unsigned int nbytes_read
= 0;
1188 gdb_assert (string
);
1190 /* Small for testing. */
1191 buffer_allocated
= 4;
1192 buffer
= xmalloc (buffer_allocated
);
1199 tlen
= MIN (len
, 4 - (memaddr
& 3));
1200 offset
= memaddr
& 3;
1202 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1205 /* The transfer request might have crossed the boundary to an
1206 unallocated region of memory. Retry the transfer, requesting
1210 errcode
= target_read_memory (memaddr
, buf
, 1);
1215 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1219 bytes
= bufptr
- buffer
;
1220 buffer_allocated
*= 2;
1221 buffer
= xrealloc (buffer
, buffer_allocated
);
1222 bufptr
= buffer
+ bytes
;
1225 for (i
= 0; i
< tlen
; i
++)
1227 *bufptr
++ = buf
[i
+ offset
];
1228 if (buf
[i
+ offset
] == '\000')
1230 nbytes_read
+= i
+ 1;
1237 nbytes_read
+= tlen
;
1246 struct target_section_table
*
1247 target_get_section_table (struct target_ops
*target
)
1249 struct target_ops
*t
;
1252 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1254 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1255 if (t
->to_get_section_table
!= NULL
)
1256 return (*t
->to_get_section_table
) (t
);
1261 /* Find a section containing ADDR. */
1263 struct target_section
*
1264 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1266 struct target_section_table
*table
= target_get_section_table (target
);
1267 struct target_section
*secp
;
1272 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1274 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1280 /* Read memory from the live target, even if currently inspecting a
1281 traceframe. The return is the same as that of target_read. */
1284 target_read_live_memory (enum target_object object
,
1285 ULONGEST memaddr
, gdb_byte
*myaddr
, LONGEST len
)
1288 struct cleanup
*cleanup
;
1290 /* Switch momentarily out of tfind mode so to access live memory.
1291 Note that this must not clear global state, such as the frame
1292 cache, which must still remain valid for the previous traceframe.
1293 We may be _building_ the frame cache at this point. */
1294 cleanup
= make_cleanup_restore_traceframe_number ();
1295 set_traceframe_number (-1);
1297 ret
= target_read (current_target
.beneath
, object
, NULL
,
1298 myaddr
, memaddr
, len
);
1300 do_cleanups (cleanup
);
1304 /* Using the set of read-only target sections of OPS, read live
1305 read-only memory. Note that the actual reads start from the
1306 top-most target again.
1308 For interface/parameters/return description see target.h,
1312 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1313 enum target_object object
,
1314 gdb_byte
*readbuf
, ULONGEST memaddr
,
1317 struct target_section
*secp
;
1318 struct target_section_table
*table
;
1320 secp
= target_section_by_addr (ops
, memaddr
);
1322 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1325 struct target_section
*p
;
1326 ULONGEST memend
= memaddr
+ len
;
1328 table
= target_get_section_table (ops
);
1330 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1332 if (memaddr
>= p
->addr
)
1334 if (memend
<= p
->endaddr
)
1336 /* Entire transfer is within this section. */
1337 return target_read_live_memory (object
, memaddr
,
1340 else if (memaddr
>= p
->endaddr
)
1342 /* This section ends before the transfer starts. */
1347 /* This section overlaps the transfer. Just do half. */
1348 len
= p
->endaddr
- memaddr
;
1349 return target_read_live_memory (object
, memaddr
,
1359 /* Perform a partial memory transfer.
1360 For docs see target.h, to_xfer_partial. */
1363 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1364 void *readbuf
, const void *writebuf
, ULONGEST memaddr
,
1369 struct mem_region
*region
;
1370 struct inferior
*inf
;
1372 /* Zero length requests are ok and require no work. */
1376 /* For accesses to unmapped overlay sections, read directly from
1377 files. Must do this first, as MEMADDR may need adjustment. */
1378 if (readbuf
!= NULL
&& overlay_debugging
)
1380 struct obj_section
*section
= find_pc_overlay (memaddr
);
1382 if (pc_in_unmapped_range (memaddr
, section
))
1384 struct target_section_table
*table
1385 = target_get_section_table (ops
);
1386 const char *section_name
= section
->the_bfd_section
->name
;
1388 memaddr
= overlay_mapped_address (memaddr
, section
);
1389 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1392 table
->sections_end
,
1397 /* Try the executable files, if "trust-readonly-sections" is set. */
1398 if (readbuf
!= NULL
&& trust_readonly
)
1400 struct target_section
*secp
;
1401 struct target_section_table
*table
;
1403 secp
= target_section_by_addr (ops
, memaddr
);
1405 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1408 table
= target_get_section_table (ops
);
1409 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1412 table
->sections_end
,
1417 /* If reading unavailable memory in the context of traceframes, and
1418 this address falls within a read-only section, fallback to
1419 reading from live memory. */
1420 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1422 VEC(mem_range_s
) *available
;
1424 /* If we fail to get the set of available memory, then the
1425 target does not support querying traceframe info, and so we
1426 attempt reading from the traceframe anyway (assuming the
1427 target implements the old QTro packet then). */
1428 if (traceframe_available_memory (&available
, memaddr
, len
))
1430 struct cleanup
*old_chain
;
1432 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1434 if (VEC_empty (mem_range_s
, available
)
1435 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1437 /* Don't read into the traceframe's available
1439 if (!VEC_empty (mem_range_s
, available
))
1441 LONGEST oldlen
= len
;
1443 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1444 gdb_assert (len
<= oldlen
);
1447 do_cleanups (old_chain
);
1449 /* This goes through the topmost target again. */
1450 res
= memory_xfer_live_readonly_partial (ops
, object
,
1451 readbuf
, memaddr
, len
);
1455 /* No use trying further, we know some memory starting
1456 at MEMADDR isn't available. */
1460 /* Don't try to read more than how much is available, in
1461 case the target implements the deprecated QTro packet to
1462 cater for older GDBs (the target's knowledge of read-only
1463 sections may be outdated by now). */
1464 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1466 do_cleanups (old_chain
);
1470 /* Try GDB's internal data cache. */
1471 region
= lookup_mem_region (memaddr
);
1472 /* region->hi == 0 means there's no upper bound. */
1473 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1476 reg_len
= region
->hi
- memaddr
;
1478 switch (region
->attrib
.mode
)
1481 if (writebuf
!= NULL
)
1486 if (readbuf
!= NULL
)
1491 /* We only support writing to flash during "load" for now. */
1492 if (writebuf
!= NULL
)
1493 error (_("Writing to flash memory forbidden in this context"));
1500 if (!ptid_equal (inferior_ptid
, null_ptid
))
1501 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1506 /* The dcache reads whole cache lines; that doesn't play well
1507 with reading from a trace buffer, because reading outside of
1508 the collected memory range fails. */
1509 && get_traceframe_number () == -1
1510 && (region
->attrib
.cache
1511 || (stack_cache_enabled_p
&& object
== TARGET_OBJECT_STACK_MEMORY
)))
1513 if (readbuf
!= NULL
)
1514 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
, readbuf
,
1517 /* FIXME drow/2006-08-09: If we're going to preserve const
1518 correctness dcache_xfer_memory should take readbuf and
1520 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
,
1527 if (readbuf
&& !show_memory_breakpoints
)
1528 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1533 /* If none of those methods found the memory we wanted, fall back
1534 to a target partial transfer. Normally a single call to
1535 to_xfer_partial is enough; if it doesn't recognize an object
1536 it will call the to_xfer_partial of the next target down.
1537 But for memory this won't do. Memory is the only target
1538 object which can be read from more than one valid target.
1539 A core file, for instance, could have some of memory but
1540 delegate other bits to the target below it. So, we must
1541 manually try all targets. */
1545 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1546 readbuf
, writebuf
, memaddr
, reg_len
);
1550 /* We want to continue past core files to executables, but not
1551 past a running target's memory. */
1552 if (ops
->to_has_all_memory (ops
))
1557 while (ops
!= NULL
);
1559 if (res
> 0 && readbuf
!= NULL
&& !show_memory_breakpoints
)
1560 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1562 /* Make sure the cache gets updated no matter what - if we are writing
1563 to the stack. Even if this write is not tagged as such, we still need
1564 to update the cache. */
1569 && !region
->attrib
.cache
1570 && stack_cache_enabled_p
1571 && object
!= TARGET_OBJECT_STACK_MEMORY
)
1573 dcache_update (target_dcache
, memaddr
, (void *) writebuf
, res
);
1576 /* If we still haven't got anything, return the last error. We
1582 restore_show_memory_breakpoints (void *arg
)
1584 show_memory_breakpoints
= (uintptr_t) arg
;
1588 make_show_memory_breakpoints_cleanup (int show
)
1590 int current
= show_memory_breakpoints
;
1592 show_memory_breakpoints
= show
;
1593 return make_cleanup (restore_show_memory_breakpoints
,
1594 (void *) (uintptr_t) current
);
1597 /* For docs see target.h, to_xfer_partial. */
1600 target_xfer_partial (struct target_ops
*ops
,
1601 enum target_object object
, const char *annex
,
1602 void *readbuf
, const void *writebuf
,
1603 ULONGEST offset
, LONGEST len
)
1607 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1609 if (writebuf
&& !may_write_memory
)
1610 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1611 core_addr_to_string_nz (offset
), plongest (len
));
1613 /* If this is a memory transfer, let the memory-specific code
1614 have a look at it instead. Memory transfers are more
1616 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
)
1617 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1618 writebuf
, offset
, len
);
1621 enum target_object raw_object
= object
;
1623 /* If this is a raw memory transfer, request the normal
1624 memory object from other layers. */
1625 if (raw_object
== TARGET_OBJECT_RAW_MEMORY
)
1626 raw_object
= TARGET_OBJECT_MEMORY
;
1628 retval
= ops
->to_xfer_partial (ops
, raw_object
, annex
, readbuf
,
1629 writebuf
, offset
, len
);
1634 const unsigned char *myaddr
= NULL
;
1636 fprintf_unfiltered (gdb_stdlog
,
1637 "%s:target_xfer_partial "
1638 "(%d, %s, %s, %s, %s, %s) = %s",
1641 (annex
? annex
: "(null)"),
1642 host_address_to_string (readbuf
),
1643 host_address_to_string (writebuf
),
1644 core_addr_to_string_nz (offset
),
1645 plongest (len
), plongest (retval
));
1651 if (retval
> 0 && myaddr
!= NULL
)
1655 fputs_unfiltered (", bytes =", gdb_stdlog
);
1656 for (i
= 0; i
< retval
; i
++)
1658 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1660 if (targetdebug
< 2 && i
> 0)
1662 fprintf_unfiltered (gdb_stdlog
, " ...");
1665 fprintf_unfiltered (gdb_stdlog
, "\n");
1668 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1672 fputc_unfiltered ('\n', gdb_stdlog
);
1677 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1678 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1679 if any error occurs.
1681 If an error occurs, no guarantee is made about the contents of the data at
1682 MYADDR. In particular, the caller should not depend upon partial reads
1683 filling the buffer with good data. There is no way for the caller to know
1684 how much good data might have been transfered anyway. Callers that can
1685 deal with partial reads should call target_read (which will retry until
1686 it makes no progress, and then return how much was transferred). */
1689 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1691 /* Dispatch to the topmost target, not the flattened current_target.
1692 Memory accesses check target->to_has_(all_)memory, and the
1693 flattened target doesn't inherit those. */
1694 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1695 myaddr
, memaddr
, len
) == len
)
1701 /* Like target_read_memory, but specify explicitly that this is a read from
1702 the target's stack. This may trigger different cache behavior. */
1705 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1707 /* Dispatch to the topmost target, not the flattened current_target.
1708 Memory accesses check target->to_has_(all_)memory, and the
1709 flattened target doesn't inherit those. */
1711 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1712 myaddr
, memaddr
, len
) == len
)
1718 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1719 Returns either 0 for success or an errno value if any error occurs.
1720 If an error occurs, no guarantee is made about how much data got written.
1721 Callers that can deal with partial writes should call target_write. */
1724 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
1726 /* Dispatch to the topmost target, not the flattened current_target.
1727 Memory accesses check target->to_has_(all_)memory, and the
1728 flattened target doesn't inherit those. */
1729 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1730 myaddr
, memaddr
, len
) == len
)
1736 /* Fetch the target's memory map. */
1739 target_memory_map (void)
1741 VEC(mem_region_s
) *result
;
1742 struct mem_region
*last_one
, *this_one
;
1744 struct target_ops
*t
;
1747 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1749 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1750 if (t
->to_memory_map
!= NULL
)
1756 result
= t
->to_memory_map (t
);
1760 qsort (VEC_address (mem_region_s
, result
),
1761 VEC_length (mem_region_s
, result
),
1762 sizeof (struct mem_region
), mem_region_cmp
);
1764 /* Check that regions do not overlap. Simultaneously assign
1765 a numbering for the "mem" commands to use to refer to
1768 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1770 this_one
->number
= ix
;
1772 if (last_one
&& last_one
->hi
> this_one
->lo
)
1774 warning (_("Overlapping regions in memory map: ignoring"));
1775 VEC_free (mem_region_s
, result
);
1778 last_one
= this_one
;
1785 target_flash_erase (ULONGEST address
, LONGEST length
)
1787 struct target_ops
*t
;
1789 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1790 if (t
->to_flash_erase
!= NULL
)
1793 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1794 hex_string (address
), phex (length
, 0));
1795 t
->to_flash_erase (t
, address
, length
);
1803 target_flash_done (void)
1805 struct target_ops
*t
;
1807 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1808 if (t
->to_flash_done
!= NULL
)
1811 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1812 t
->to_flash_done (t
);
1820 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1821 struct cmd_list_element
*c
, const char *value
)
1823 fprintf_filtered (file
,
1824 _("Mode for reading from readonly sections is %s.\n"),
1828 /* More generic transfers. */
1831 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1832 const char *annex
, gdb_byte
*readbuf
,
1833 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1835 if (object
== TARGET_OBJECT_MEMORY
1836 && ops
->deprecated_xfer_memory
!= NULL
)
1837 /* If available, fall back to the target's
1838 "deprecated_xfer_memory" method. */
1843 if (writebuf
!= NULL
)
1845 void *buffer
= xmalloc (len
);
1846 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1848 memcpy (buffer
, writebuf
, len
);
1849 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1850 1/*write*/, NULL
, ops
);
1851 do_cleanups (cleanup
);
1853 if (readbuf
!= NULL
)
1854 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1855 0/*read*/, NULL
, ops
);
1858 else if (xfered
== 0 && errno
== 0)
1859 /* "deprecated_xfer_memory" uses 0, cross checked against
1860 ERRNO as one indication of an error. */
1865 else if (ops
->beneath
!= NULL
)
1866 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1867 readbuf
, writebuf
, offset
, len
);
1872 /* The xfer_partial handler for the topmost target. Unlike the default,
1873 it does not need to handle memory specially; it just passes all
1874 requests down the stack. */
1877 current_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1878 const char *annex
, gdb_byte
*readbuf
,
1879 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1881 if (ops
->beneath
!= NULL
)
1882 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1883 readbuf
, writebuf
, offset
, len
);
1888 /* Target vector read/write partial wrapper functions. */
1891 target_read_partial (struct target_ops
*ops
,
1892 enum target_object object
,
1893 const char *annex
, gdb_byte
*buf
,
1894 ULONGEST offset
, LONGEST len
)
1896 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
);
1900 target_write_partial (struct target_ops
*ops
,
1901 enum target_object object
,
1902 const char *annex
, const gdb_byte
*buf
,
1903 ULONGEST offset
, LONGEST len
)
1905 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
);
1908 /* Wrappers to perform the full transfer. */
1910 /* For docs on target_read see target.h. */
1913 target_read (struct target_ops
*ops
,
1914 enum target_object object
,
1915 const char *annex
, gdb_byte
*buf
,
1916 ULONGEST offset
, LONGEST len
)
1920 while (xfered
< len
)
1922 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1923 (gdb_byte
*) buf
+ xfered
,
1924 offset
+ xfered
, len
- xfered
);
1926 /* Call an observer, notifying them of the xfer progress? */
1937 /** Assuming that the entire [begin, end) range of memory cannot be read,
1938 try to read whatever subrange is possible to read.
1940 The function results, in RESULT, either zero or one memory block.
1941 If there's a readable subrange at the beginning, it is completely
1942 read and returned. Any further readable subrange will not be read.
1943 Otherwise, if there's a readable subrange at the end, it will be
1944 completely read and returned. Any readable subranges before it (obviously,
1945 not starting at the beginning), will be ignored. In other cases --
1946 either no readable subrange, or readable subrange (s) that is neither
1947 at the beginning, or end, nothing is returned.
1949 The purpose of this function is to handle a read across a boundary of
1950 accessible memory in a case when memory map is not available. The above
1951 restrictions are fine for this case, but will give incorrect results if
1952 the memory is 'patchy'. However, supporting 'patchy' memory would require
1953 trying to read every single byte, and it seems unacceptable solution.
1954 Explicit memory map is recommended for this case -- and
1955 target_read_memory_robust will take care of reading multiple ranges
1959 read_whatever_is_readable (struct target_ops
*ops
,
1960 ULONGEST begin
, ULONGEST end
,
1961 VEC(memory_read_result_s
) **result
)
1963 gdb_byte
*buf
= xmalloc (end
-begin
);
1964 ULONGEST current_begin
= begin
;
1965 ULONGEST current_end
= end
;
1967 memory_read_result_s r
;
1969 /* If we previously failed to read 1 byte, nothing can be done here. */
1970 if (end
- begin
<= 1)
1973 /* Check that either first or the last byte is readable, and give up
1974 if not. This heuristic is meant to permit reading accessible memory
1975 at the boundary of accessible region. */
1976 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1977 buf
, begin
, 1) == 1)
1982 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1983 buf
+ (end
-begin
) - 1, end
- 1, 1) == 1)
1993 /* Loop invariant is that the [current_begin, current_end) was previously
1994 found to be not readable as a whole.
1996 Note loop condition -- if the range has 1 byte, we can't divide the range
1997 so there's no point trying further. */
1998 while (current_end
- current_begin
> 1)
2000 ULONGEST first_half_begin
, first_half_end
;
2001 ULONGEST second_half_begin
, second_half_end
;
2004 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
2007 first_half_begin
= current_begin
;
2008 first_half_end
= middle
;
2009 second_half_begin
= middle
;
2010 second_half_end
= current_end
;
2014 first_half_begin
= middle
;
2015 first_half_end
= current_end
;
2016 second_half_begin
= current_begin
;
2017 second_half_end
= middle
;
2020 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2021 buf
+ (first_half_begin
- begin
),
2023 first_half_end
- first_half_begin
);
2025 if (xfer
== first_half_end
- first_half_begin
)
2027 /* This half reads up fine. So, the error must be in the
2029 current_begin
= second_half_begin
;
2030 current_end
= second_half_end
;
2034 /* This half is not readable. Because we've tried one byte, we
2035 know some part of this half if actually redable. Go to the next
2036 iteration to divide again and try to read.
2038 We don't handle the other half, because this function only tries
2039 to read a single readable subrange. */
2040 current_begin
= first_half_begin
;
2041 current_end
= first_half_end
;
2047 /* The [begin, current_begin) range has been read. */
2049 r
.end
= current_begin
;
2054 /* The [current_end, end) range has been read. */
2055 LONGEST rlen
= end
- current_end
;
2056 r
.data
= xmalloc (rlen
);
2057 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2058 r
.begin
= current_end
;
2062 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2066 free_memory_read_result_vector (void *x
)
2068 VEC(memory_read_result_s
) *v
= x
;
2069 memory_read_result_s
*current
;
2072 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2074 xfree (current
->data
);
2076 VEC_free (memory_read_result_s
, v
);
2079 VEC(memory_read_result_s
) *
2080 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2082 VEC(memory_read_result_s
) *result
= 0;
2085 while (xfered
< len
)
2087 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2090 /* If there is no explicit region, a fake one should be created. */
2091 gdb_assert (region
);
2093 if (region
->hi
== 0)
2094 rlen
= len
- xfered
;
2096 rlen
= region
->hi
- offset
;
2098 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2100 /* Cannot read this region. Note that we can end up here only
2101 if the region is explicitly marked inaccessible, or
2102 'inaccessible-by-default' is in effect. */
2107 LONGEST to_read
= min (len
- xfered
, rlen
);
2108 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2110 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2111 (gdb_byte
*) buffer
,
2112 offset
+ xfered
, to_read
);
2113 /* Call an observer, notifying them of the xfer progress? */
2116 /* Got an error reading full chunk. See if maybe we can read
2119 read_whatever_is_readable (ops
, offset
+ xfered
,
2120 offset
+ xfered
+ to_read
, &result
);
2125 struct memory_read_result r
;
2127 r
.begin
= offset
+ xfered
;
2128 r
.end
= r
.begin
+ xfer
;
2129 VEC_safe_push (memory_read_result_s
, result
, &r
);
2139 /* An alternative to target_write with progress callbacks. */
2142 target_write_with_progress (struct target_ops
*ops
,
2143 enum target_object object
,
2144 const char *annex
, const gdb_byte
*buf
,
2145 ULONGEST offset
, LONGEST len
,
2146 void (*progress
) (ULONGEST
, void *), void *baton
)
2150 /* Give the progress callback a chance to set up. */
2152 (*progress
) (0, baton
);
2154 while (xfered
< len
)
2156 LONGEST xfer
= target_write_partial (ops
, object
, annex
,
2157 (gdb_byte
*) buf
+ xfered
,
2158 offset
+ xfered
, len
- xfered
);
2166 (*progress
) (xfer
, baton
);
2174 /* For docs on target_write see target.h. */
2177 target_write (struct target_ops
*ops
,
2178 enum target_object object
,
2179 const char *annex
, const gdb_byte
*buf
,
2180 ULONGEST offset
, LONGEST len
)
2182 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2186 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2187 the size of the transferred data. PADDING additional bytes are
2188 available in *BUF_P. This is a helper function for
2189 target_read_alloc; see the declaration of that function for more
2193 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2194 const char *annex
, gdb_byte
**buf_p
, int padding
)
2196 size_t buf_alloc
, buf_pos
;
2200 /* This function does not have a length parameter; it reads the
2201 entire OBJECT). Also, it doesn't support objects fetched partly
2202 from one target and partly from another (in a different stratum,
2203 e.g. a core file and an executable). Both reasons make it
2204 unsuitable for reading memory. */
2205 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2207 /* Start by reading up to 4K at a time. The target will throttle
2208 this number down if necessary. */
2210 buf
= xmalloc (buf_alloc
);
2214 n
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2215 buf_pos
, buf_alloc
- buf_pos
- padding
);
2218 /* An error occurred. */
2224 /* Read all there was. */
2234 /* If the buffer is filling up, expand it. */
2235 if (buf_alloc
< buf_pos
* 2)
2238 buf
= xrealloc (buf
, buf_alloc
);
2245 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2246 the size of the transferred data. See the declaration in "target.h"
2247 function for more information about the return value. */
2250 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2251 const char *annex
, gdb_byte
**buf_p
)
2253 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2256 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2257 returned as a string, allocated using xmalloc. If an error occurs
2258 or the transfer is unsupported, NULL is returned. Empty objects
2259 are returned as allocated but empty strings. A warning is issued
2260 if the result contains any embedded NUL bytes. */
2263 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2267 LONGEST transferred
;
2269 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2271 if (transferred
< 0)
2274 if (transferred
== 0)
2275 return xstrdup ("");
2277 buffer
[transferred
] = 0;
2278 if (strlen (buffer
) < transferred
)
2279 warning (_("target object %d, annex %s, "
2280 "contained unexpected null characters"),
2281 (int) object
, annex
? annex
: "(none)");
2283 return (char *) buffer
;
2286 /* Memory transfer methods. */
2289 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2292 /* This method is used to read from an alternate, non-current
2293 target. This read must bypass the overlay support (as symbols
2294 don't match this target), and GDB's internal cache (wrong cache
2295 for this target). */
2296 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2298 memory_error (EIO
, addr
);
2302 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2303 int len
, enum bfd_endian byte_order
)
2305 gdb_byte buf
[sizeof (ULONGEST
)];
2307 gdb_assert (len
<= sizeof (buf
));
2308 get_target_memory (ops
, addr
, buf
, len
);
2309 return extract_unsigned_integer (buf
, len
, byte_order
);
2313 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2314 struct bp_target_info
*bp_tgt
)
2316 if (!may_insert_breakpoints
)
2318 warning (_("May not insert breakpoints"));
2322 return (*current_target
.to_insert_breakpoint
) (gdbarch
, bp_tgt
);
2326 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2327 struct bp_target_info
*bp_tgt
)
2329 /* This is kind of a weird case to handle, but the permission might
2330 have been changed after breakpoints were inserted - in which case
2331 we should just take the user literally and assume that any
2332 breakpoints should be left in place. */
2333 if (!may_insert_breakpoints
)
2335 warning (_("May not remove breakpoints"));
2339 return (*current_target
.to_remove_breakpoint
) (gdbarch
, bp_tgt
);
2343 target_info (char *args
, int from_tty
)
2345 struct target_ops
*t
;
2346 int has_all_mem
= 0;
2348 if (symfile_objfile
!= NULL
)
2349 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile
->name
);
2351 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2353 if (!(*t
->to_has_memory
) (t
))
2356 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2359 printf_unfiltered (_("\tWhile running this, "
2360 "GDB does not access memory from...\n"));
2361 printf_unfiltered ("%s:\n", t
->to_longname
);
2362 (t
->to_files_info
) (t
);
2363 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2367 /* This function is called before any new inferior is created, e.g.
2368 by running a program, attaching, or connecting to a target.
2369 It cleans up any state from previous invocations which might
2370 change between runs. This is a subset of what target_preopen
2371 resets (things which might change between targets). */
2374 target_pre_inferior (int from_tty
)
2376 /* Clear out solib state. Otherwise the solib state of the previous
2377 inferior might have survived and is entirely wrong for the new
2378 target. This has been observed on GNU/Linux using glibc 2.3. How
2390 Cannot access memory at address 0xdeadbeef
2393 /* In some OSs, the shared library list is the same/global/shared
2394 across inferiors. If code is shared between processes, so are
2395 memory regions and features. */
2396 if (!gdbarch_has_global_solist (target_gdbarch
))
2398 no_shared_libraries (NULL
, from_tty
);
2400 invalidate_target_mem_regions ();
2402 target_clear_description ();
2406 /* Callback for iterate_over_inferiors. Gets rid of the given
2410 dispose_inferior (struct inferior
*inf
, void *args
)
2412 struct thread_info
*thread
;
2414 thread
= any_thread_of_process (inf
->pid
);
2417 switch_to_thread (thread
->ptid
);
2419 /* Core inferiors actually should be detached, not killed. */
2420 if (target_has_execution
)
2423 target_detach (NULL
, 0);
2429 /* This is to be called by the open routine before it does
2433 target_preopen (int from_tty
)
2437 if (have_inferiors ())
2440 || !have_live_inferiors ()
2441 || query (_("A program is being debugged already. Kill it? ")))
2442 iterate_over_inferiors (dispose_inferior
, NULL
);
2444 error (_("Program not killed."));
2447 /* Calling target_kill may remove the target from the stack. But if
2448 it doesn't (which seems like a win for UDI), remove it now. */
2449 /* Leave the exec target, though. The user may be switching from a
2450 live process to a core of the same program. */
2451 pop_all_targets_above (file_stratum
, 0);
2453 target_pre_inferior (from_tty
);
2456 /* Detach a target after doing deferred register stores. */
2459 target_detach (char *args
, int from_tty
)
2461 struct target_ops
* t
;
2463 if (gdbarch_has_global_breakpoints (target_gdbarch
))
2464 /* Don't remove global breakpoints here. They're removed on
2465 disconnection from the target. */
2468 /* If we're in breakpoints-always-inserted mode, have to remove
2469 them before detaching. */
2470 remove_breakpoints_pid (PIDGET (inferior_ptid
));
2472 prepare_for_detach ();
2474 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2476 if (t
->to_detach
!= NULL
)
2478 t
->to_detach (t
, args
, from_tty
);
2480 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2486 internal_error (__FILE__
, __LINE__
, _("could not find a target to detach"));
2490 target_disconnect (char *args
, int from_tty
)
2492 struct target_ops
*t
;
2494 /* If we're in breakpoints-always-inserted mode or if breakpoints
2495 are global across processes, we have to remove them before
2497 remove_breakpoints ();
2499 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2500 if (t
->to_disconnect
!= NULL
)
2503 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2505 t
->to_disconnect (t
, args
, from_tty
);
2513 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2515 struct target_ops
*t
;
2517 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2519 if (t
->to_wait
!= NULL
)
2521 ptid_t retval
= (*t
->to_wait
) (t
, ptid
, status
, options
);
2525 char *status_string
;
2527 status_string
= target_waitstatus_to_string (status
);
2528 fprintf_unfiltered (gdb_stdlog
,
2529 "target_wait (%d, status) = %d, %s\n",
2530 PIDGET (ptid
), PIDGET (retval
),
2532 xfree (status_string
);
2543 target_pid_to_str (ptid_t ptid
)
2545 struct target_ops
*t
;
2547 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2549 if (t
->to_pid_to_str
!= NULL
)
2550 return (*t
->to_pid_to_str
) (t
, ptid
);
2553 return normal_pid_to_str (ptid
);
2557 target_thread_name (struct thread_info
*info
)
2559 struct target_ops
*t
;
2561 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2563 if (t
->to_thread_name
!= NULL
)
2564 return (*t
->to_thread_name
) (info
);
2571 target_resume (ptid_t ptid
, int step
, enum target_signal signal
)
2573 struct target_ops
*t
;
2575 target_dcache_invalidate ();
2577 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2579 if (t
->to_resume
!= NULL
)
2581 t
->to_resume (t
, ptid
, step
, signal
);
2583 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2585 step
? "step" : "continue",
2586 target_signal_to_name (signal
));
2588 registers_changed_ptid (ptid
);
2589 set_executing (ptid
, 1);
2590 set_running (ptid
, 1);
2591 clear_inline_frame_state (ptid
);
2598 /* Look through the list of possible targets for a target that can
2602 target_follow_fork (int follow_child
)
2604 struct target_ops
*t
;
2606 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2608 if (t
->to_follow_fork
!= NULL
)
2610 int retval
= t
->to_follow_fork (t
, follow_child
);
2613 fprintf_unfiltered (gdb_stdlog
, "target_follow_fork (%d) = %d\n",
2614 follow_child
, retval
);
2619 /* Some target returned a fork event, but did not know how to follow it. */
2620 internal_error (__FILE__
, __LINE__
,
2621 _("could not find a target to follow fork"));
2625 target_mourn_inferior (void)
2627 struct target_ops
*t
;
2629 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2631 if (t
->to_mourn_inferior
!= NULL
)
2633 t
->to_mourn_inferior (t
);
2635 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2637 /* We no longer need to keep handles on any of the object files.
2638 Make sure to release them to avoid unnecessarily locking any
2639 of them while we're not actually debugging. */
2640 bfd_cache_close_all ();
2646 internal_error (__FILE__
, __LINE__
,
2647 _("could not find a target to follow mourn inferior"));
2650 /* Look for a target which can describe architectural features, starting
2651 from TARGET. If we find one, return its description. */
2653 const struct target_desc
*
2654 target_read_description (struct target_ops
*target
)
2656 struct target_ops
*t
;
2658 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2659 if (t
->to_read_description
!= NULL
)
2661 const struct target_desc
*tdesc
;
2663 tdesc
= t
->to_read_description (t
);
2671 /* The default implementation of to_search_memory.
2672 This implements a basic search of memory, reading target memory and
2673 performing the search here (as opposed to performing the search in on the
2674 target side with, for example, gdbserver). */
2677 simple_search_memory (struct target_ops
*ops
,
2678 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2679 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2680 CORE_ADDR
*found_addrp
)
2682 /* NOTE: also defined in find.c testcase. */
2683 #define SEARCH_CHUNK_SIZE 16000
2684 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2685 /* Buffer to hold memory contents for searching. */
2686 gdb_byte
*search_buf
;
2687 unsigned search_buf_size
;
2688 struct cleanup
*old_cleanups
;
2690 search_buf_size
= chunk_size
+ pattern_len
- 1;
2692 /* No point in trying to allocate a buffer larger than the search space. */
2693 if (search_space_len
< search_buf_size
)
2694 search_buf_size
= search_space_len
;
2696 search_buf
= malloc (search_buf_size
);
2697 if (search_buf
== NULL
)
2698 error (_("Unable to allocate memory to perform the search."));
2699 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2701 /* Prime the search buffer. */
2703 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2704 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2706 warning (_("Unable to access target memory at %s, halting search."),
2707 hex_string (start_addr
));
2708 do_cleanups (old_cleanups
);
2712 /* Perform the search.
2714 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2715 When we've scanned N bytes we copy the trailing bytes to the start and
2716 read in another N bytes. */
2718 while (search_space_len
>= pattern_len
)
2720 gdb_byte
*found_ptr
;
2721 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2723 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2724 pattern
, pattern_len
);
2726 if (found_ptr
!= NULL
)
2728 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2730 *found_addrp
= found_addr
;
2731 do_cleanups (old_cleanups
);
2735 /* Not found in this chunk, skip to next chunk. */
2737 /* Don't let search_space_len wrap here, it's unsigned. */
2738 if (search_space_len
>= chunk_size
)
2739 search_space_len
-= chunk_size
;
2741 search_space_len
= 0;
2743 if (search_space_len
>= pattern_len
)
2745 unsigned keep_len
= search_buf_size
- chunk_size
;
2746 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2749 /* Copy the trailing part of the previous iteration to the front
2750 of the buffer for the next iteration. */
2751 gdb_assert (keep_len
== pattern_len
- 1);
2752 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2754 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2756 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2757 search_buf
+ keep_len
, read_addr
,
2758 nr_to_read
) != nr_to_read
)
2760 warning (_("Unable to access target "
2761 "memory at %s, halting search."),
2762 hex_string (read_addr
));
2763 do_cleanups (old_cleanups
);
2767 start_addr
+= chunk_size
;
2773 do_cleanups (old_cleanups
);
2777 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2778 sequence of bytes in PATTERN with length PATTERN_LEN.
2780 The result is 1 if found, 0 if not found, and -1 if there was an error
2781 requiring halting of the search (e.g. memory read error).
2782 If the pattern is found the address is recorded in FOUND_ADDRP. */
2785 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2786 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2787 CORE_ADDR
*found_addrp
)
2789 struct target_ops
*t
;
2792 /* We don't use INHERIT to set current_target.to_search_memory,
2793 so we have to scan the target stack and handle targetdebug
2797 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2798 hex_string (start_addr
));
2800 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2801 if (t
->to_search_memory
!= NULL
)
2806 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2807 pattern
, pattern_len
, found_addrp
);
2811 /* If a special version of to_search_memory isn't available, use the
2813 found
= simple_search_memory (current_target
.beneath
,
2814 start_addr
, search_space_len
,
2815 pattern
, pattern_len
, found_addrp
);
2819 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2824 /* Look through the currently pushed targets. If none of them will
2825 be able to restart the currently running process, issue an error
2829 target_require_runnable (void)
2831 struct target_ops
*t
;
2833 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2835 /* If this target knows how to create a new program, then
2836 assume we will still be able to after killing the current
2837 one. Either killing and mourning will not pop T, or else
2838 find_default_run_target will find it again. */
2839 if (t
->to_create_inferior
!= NULL
)
2842 /* Do not worry about thread_stratum targets that can not
2843 create inferiors. Assume they will be pushed again if
2844 necessary, and continue to the process_stratum. */
2845 if (t
->to_stratum
== thread_stratum
2846 || t
->to_stratum
== arch_stratum
)
2849 error (_("The \"%s\" target does not support \"run\". "
2850 "Try \"help target\" or \"continue\"."),
2854 /* This function is only called if the target is running. In that
2855 case there should have been a process_stratum target and it
2856 should either know how to create inferiors, or not... */
2857 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2860 /* Look through the list of possible targets for a target that can
2861 execute a run or attach command without any other data. This is
2862 used to locate the default process stratum.
2864 If DO_MESG is not NULL, the result is always valid (error() is
2865 called for errors); else, return NULL on error. */
2867 static struct target_ops
*
2868 find_default_run_target (char *do_mesg
)
2870 struct target_ops
**t
;
2871 struct target_ops
*runable
= NULL
;
2876 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2879 if ((*t
)->to_can_run
&& target_can_run (*t
))
2889 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2898 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
2900 struct target_ops
*t
;
2902 t
= find_default_run_target ("attach");
2903 (t
->to_attach
) (t
, args
, from_tty
);
2908 find_default_create_inferior (struct target_ops
*ops
,
2909 char *exec_file
, char *allargs
, char **env
,
2912 struct target_ops
*t
;
2914 t
= find_default_run_target ("run");
2915 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
2920 find_default_can_async_p (void)
2922 struct target_ops
*t
;
2924 /* This may be called before the target is pushed on the stack;
2925 look for the default process stratum. If there's none, gdb isn't
2926 configured with a native debugger, and target remote isn't
2928 t
= find_default_run_target (NULL
);
2929 if (t
&& t
->to_can_async_p
)
2930 return (t
->to_can_async_p
) ();
2935 find_default_is_async_p (void)
2937 struct target_ops
*t
;
2939 /* This may be called before the target is pushed on the stack;
2940 look for the default process stratum. If there's none, gdb isn't
2941 configured with a native debugger, and target remote isn't
2943 t
= find_default_run_target (NULL
);
2944 if (t
&& t
->to_is_async_p
)
2945 return (t
->to_is_async_p
) ();
2950 find_default_supports_non_stop (void)
2952 struct target_ops
*t
;
2954 t
= find_default_run_target (NULL
);
2955 if (t
&& t
->to_supports_non_stop
)
2956 return (t
->to_supports_non_stop
) ();
2961 target_supports_non_stop (void)
2963 struct target_ops
*t
;
2965 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2966 if (t
->to_supports_non_stop
)
2967 return t
->to_supports_non_stop ();
2974 target_get_osdata (const char *type
)
2976 struct target_ops
*t
;
2978 /* If we're already connected to something that can get us OS
2979 related data, use it. Otherwise, try using the native
2981 if (current_target
.to_stratum
>= process_stratum
)
2982 t
= current_target
.beneath
;
2984 t
= find_default_run_target ("get OS data");
2989 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2992 /* Determine the current address space of thread PTID. */
2994 struct address_space
*
2995 target_thread_address_space (ptid_t ptid
)
2997 struct address_space
*aspace
;
2998 struct inferior
*inf
;
2999 struct target_ops
*t
;
3001 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3003 if (t
->to_thread_address_space
!= NULL
)
3005 aspace
= t
->to_thread_address_space (t
, ptid
);
3006 gdb_assert (aspace
);
3009 fprintf_unfiltered (gdb_stdlog
,
3010 "target_thread_address_space (%s) = %d\n",
3011 target_pid_to_str (ptid
),
3012 address_space_num (aspace
));
3017 /* Fall-back to the "main" address space of the inferior. */
3018 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3020 if (inf
== NULL
|| inf
->aspace
== NULL
)
3021 internal_error (__FILE__
, __LINE__
,
3022 _("Can't determine the current "
3023 "address space of thread %s\n"),
3024 target_pid_to_str (ptid
));
3030 default_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3032 return (len
<= gdbarch_ptr_bit (target_gdbarch
) / TARGET_CHAR_BIT
);
3036 default_watchpoint_addr_within_range (struct target_ops
*target
,
3038 CORE_ADDR start
, int length
)
3040 return addr
>= start
&& addr
< start
+ length
;
3043 static struct gdbarch
*
3044 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3046 return target_gdbarch
;
3062 return_minus_one (void)
3067 /* Find a single runnable target in the stack and return it. If for
3068 some reason there is more than one, return NULL. */
3071 find_run_target (void)
3073 struct target_ops
**t
;
3074 struct target_ops
*runable
= NULL
;
3079 for (t
= target_structs
; t
< target_structs
+ target_struct_size
; ++t
)
3081 if ((*t
)->to_can_run
&& target_can_run (*t
))
3088 return (count
== 1 ? runable
: NULL
);
3092 * Find the next target down the stack from the specified target.
3096 find_target_beneath (struct target_ops
*t
)
3102 /* The inferior process has died. Long live the inferior! */
3105 generic_mourn_inferior (void)
3109 ptid
= inferior_ptid
;
3110 inferior_ptid
= null_ptid
;
3112 if (!ptid_equal (ptid
, null_ptid
))
3114 int pid
= ptid_get_pid (ptid
);
3115 exit_inferior (pid
);
3118 breakpoint_init_inferior (inf_exited
);
3119 registers_changed ();
3121 reopen_exec_file ();
3122 reinit_frame_cache ();
3124 if (deprecated_detach_hook
)
3125 deprecated_detach_hook ();
3128 /* Helper function for child_wait and the derivatives of child_wait.
3129 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3130 translation of that in OURSTATUS. */
3132 store_waitstatus (struct target_waitstatus
*ourstatus
, int hoststatus
)
3134 if (WIFEXITED (hoststatus
))
3136 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
3137 ourstatus
->value
.integer
= WEXITSTATUS (hoststatus
);
3139 else if (!WIFSTOPPED (hoststatus
))
3141 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3142 ourstatus
->value
.sig
= target_signal_from_host (WTERMSIG (hoststatus
));
3146 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
3147 ourstatus
->value
.sig
= target_signal_from_host (WSTOPSIG (hoststatus
));
3151 /* Convert a normal process ID to a string. Returns the string in a
3155 normal_pid_to_str (ptid_t ptid
)
3157 static char buf
[32];
3159 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3164 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3166 return normal_pid_to_str (ptid
);
3169 /* Error-catcher for target_find_memory_regions. */
3171 dummy_find_memory_regions (find_memory_region_ftype ignore1
, void *ignore2
)
3173 error (_("Command not implemented for this target."));
3177 /* Error-catcher for target_make_corefile_notes. */
3179 dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
3181 error (_("Command not implemented for this target."));
3185 /* Error-catcher for target_get_bookmark. */
3187 dummy_get_bookmark (char *ignore1
, int ignore2
)
3193 /* Error-catcher for target_goto_bookmark. */
3195 dummy_goto_bookmark (gdb_byte
*ignore
, int from_tty
)
3200 /* Set up the handful of non-empty slots needed by the dummy target
3204 init_dummy_target (void)
3206 dummy_target
.to_shortname
= "None";
3207 dummy_target
.to_longname
= "None";
3208 dummy_target
.to_doc
= "";
3209 dummy_target
.to_attach
= find_default_attach
;
3210 dummy_target
.to_detach
=
3211 (void (*)(struct target_ops
*, char *, int))target_ignore
;
3212 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3213 dummy_target
.to_can_async_p
= find_default_can_async_p
;
3214 dummy_target
.to_is_async_p
= find_default_is_async_p
;
3215 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3216 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3217 dummy_target
.to_stratum
= dummy_stratum
;
3218 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
3219 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
3220 dummy_target
.to_get_bookmark
= dummy_get_bookmark
;
3221 dummy_target
.to_goto_bookmark
= dummy_goto_bookmark
;
3222 dummy_target
.to_xfer_partial
= default_xfer_partial
;
3223 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3224 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3225 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3226 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3227 dummy_target
.to_has_execution
3228 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3229 dummy_target
.to_stopped_by_watchpoint
= return_zero
;
3230 dummy_target
.to_stopped_data_address
=
3231 (int (*) (struct target_ops
*, CORE_ADDR
*)) return_zero
;
3232 dummy_target
.to_magic
= OPS_MAGIC
;
3236 debug_to_open (char *args
, int from_tty
)
3238 debug_target
.to_open (args
, from_tty
);
3240 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3244 target_close (struct target_ops
*targ
, int quitting
)
3246 if (targ
->to_xclose
!= NULL
)
3247 targ
->to_xclose (targ
, quitting
);
3248 else if (targ
->to_close
!= NULL
)
3249 targ
->to_close (quitting
);
3252 fprintf_unfiltered (gdb_stdlog
, "target_close (%d)\n", quitting
);
3256 target_attach (char *args
, int from_tty
)
3258 struct target_ops
*t
;
3260 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3262 if (t
->to_attach
!= NULL
)
3264 t
->to_attach (t
, args
, from_tty
);
3266 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3272 internal_error (__FILE__
, __LINE__
,
3273 _("could not find a target to attach"));
3277 target_thread_alive (ptid_t ptid
)
3279 struct target_ops
*t
;
3281 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3283 if (t
->to_thread_alive
!= NULL
)
3287 retval
= t
->to_thread_alive (t
, ptid
);
3289 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3290 PIDGET (ptid
), retval
);
3300 target_find_new_threads (void)
3302 struct target_ops
*t
;
3304 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3306 if (t
->to_find_new_threads
!= NULL
)
3308 t
->to_find_new_threads (t
);
3310 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3318 target_stop (ptid_t ptid
)
3322 warning (_("May not interrupt or stop the target, ignoring attempt"));
3326 (*current_target
.to_stop
) (ptid
);
3330 debug_to_post_attach (int pid
)
3332 debug_target
.to_post_attach (pid
);
3334 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3337 /* Return a pretty printed form of target_waitstatus.
3338 Space for the result is malloc'd, caller must free. */
3341 target_waitstatus_to_string (const struct target_waitstatus
*ws
)
3343 const char *kind_str
= "status->kind = ";
3347 case TARGET_WAITKIND_EXITED
:
3348 return xstrprintf ("%sexited, status = %d",
3349 kind_str
, ws
->value
.integer
);
3350 case TARGET_WAITKIND_STOPPED
:
3351 return xstrprintf ("%sstopped, signal = %s",
3352 kind_str
, target_signal_to_name (ws
->value
.sig
));
3353 case TARGET_WAITKIND_SIGNALLED
:
3354 return xstrprintf ("%ssignalled, signal = %s",
3355 kind_str
, target_signal_to_name (ws
->value
.sig
));
3356 case TARGET_WAITKIND_LOADED
:
3357 return xstrprintf ("%sloaded", kind_str
);
3358 case TARGET_WAITKIND_FORKED
:
3359 return xstrprintf ("%sforked", kind_str
);
3360 case TARGET_WAITKIND_VFORKED
:
3361 return xstrprintf ("%svforked", kind_str
);
3362 case TARGET_WAITKIND_EXECD
:
3363 return xstrprintf ("%sexecd", kind_str
);
3364 case TARGET_WAITKIND_SYSCALL_ENTRY
:
3365 return xstrprintf ("%sentered syscall", kind_str
);
3366 case TARGET_WAITKIND_SYSCALL_RETURN
:
3367 return xstrprintf ("%sexited syscall", kind_str
);
3368 case TARGET_WAITKIND_SPURIOUS
:
3369 return xstrprintf ("%sspurious", kind_str
);
3370 case TARGET_WAITKIND_IGNORE
:
3371 return xstrprintf ("%signore", kind_str
);
3372 case TARGET_WAITKIND_NO_HISTORY
:
3373 return xstrprintf ("%sno-history", kind_str
);
3375 return xstrprintf ("%sunknown???", kind_str
);
3380 debug_print_register (const char * func
,
3381 struct regcache
*regcache
, int regno
)
3383 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3385 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3386 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3387 && gdbarch_register_name (gdbarch
, regno
) != NULL
3388 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3389 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3390 gdbarch_register_name (gdbarch
, regno
));
3392 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3393 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3395 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3396 int i
, size
= register_size (gdbarch
, regno
);
3397 unsigned char buf
[MAX_REGISTER_SIZE
];
3399 regcache_raw_collect (regcache
, regno
, buf
);
3400 fprintf_unfiltered (gdb_stdlog
, " = ");
3401 for (i
= 0; i
< size
; i
++)
3403 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3405 if (size
<= sizeof (LONGEST
))
3407 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3409 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3410 core_addr_to_string_nz (val
), plongest (val
));
3413 fprintf_unfiltered (gdb_stdlog
, "\n");
3417 target_fetch_registers (struct regcache
*regcache
, int regno
)
3419 struct target_ops
*t
;
3421 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3423 if (t
->to_fetch_registers
!= NULL
)
3425 t
->to_fetch_registers (t
, regcache
, regno
);
3427 debug_print_register ("target_fetch_registers", regcache
, regno
);
3434 target_store_registers (struct regcache
*regcache
, int regno
)
3436 struct target_ops
*t
;
3438 if (!may_write_registers
)
3439 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3441 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3443 if (t
->to_store_registers
!= NULL
)
3445 t
->to_store_registers (t
, regcache
, regno
);
3448 debug_print_register ("target_store_registers", regcache
, regno
);
3458 target_core_of_thread (ptid_t ptid
)
3460 struct target_ops
*t
;
3462 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3464 if (t
->to_core_of_thread
!= NULL
)
3466 int retval
= t
->to_core_of_thread (t
, ptid
);
3469 fprintf_unfiltered (gdb_stdlog
,
3470 "target_core_of_thread (%d) = %d\n",
3471 PIDGET (ptid
), retval
);
3480 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3482 struct target_ops
*t
;
3484 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3486 if (t
->to_verify_memory
!= NULL
)
3488 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3491 fprintf_unfiltered (gdb_stdlog
,
3492 "target_verify_memory (%s, %s) = %d\n",
3493 paddress (target_gdbarch
, memaddr
),
3504 debug_to_prepare_to_store (struct regcache
*regcache
)
3506 debug_target
.to_prepare_to_store (regcache
);
3508 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
3512 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
3513 int write
, struct mem_attrib
*attrib
,
3514 struct target_ops
*target
)
3518 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
3521 fprintf_unfiltered (gdb_stdlog
,
3522 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3523 paddress (target_gdbarch
, memaddr
), len
,
3524 write
? "write" : "read", retval
);
3530 fputs_unfiltered (", bytes =", gdb_stdlog
);
3531 for (i
= 0; i
< retval
; i
++)
3533 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
3535 if (targetdebug
< 2 && i
> 0)
3537 fprintf_unfiltered (gdb_stdlog
, " ...");
3540 fprintf_unfiltered (gdb_stdlog
, "\n");
3543 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
3547 fputc_unfiltered ('\n', gdb_stdlog
);
3553 debug_to_files_info (struct target_ops
*target
)
3555 debug_target
.to_files_info (target
);
3557 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3561 debug_to_insert_breakpoint (struct gdbarch
*gdbarch
,
3562 struct bp_target_info
*bp_tgt
)
3566 retval
= debug_target
.to_insert_breakpoint (gdbarch
, bp_tgt
);
3568 fprintf_unfiltered (gdb_stdlog
,
3569 "target_insert_breakpoint (%s, xxx) = %ld\n",
3570 core_addr_to_string (bp_tgt
->placed_address
),
3571 (unsigned long) retval
);
3576 debug_to_remove_breakpoint (struct gdbarch
*gdbarch
,
3577 struct bp_target_info
*bp_tgt
)
3581 retval
= debug_target
.to_remove_breakpoint (gdbarch
, bp_tgt
);
3583 fprintf_unfiltered (gdb_stdlog
,
3584 "target_remove_breakpoint (%s, xxx) = %ld\n",
3585 core_addr_to_string (bp_tgt
->placed_address
),
3586 (unsigned long) retval
);
3591 debug_to_can_use_hw_breakpoint (int type
, int cnt
, int from_tty
)
3595 retval
= debug_target
.to_can_use_hw_breakpoint (type
, cnt
, from_tty
);
3597 fprintf_unfiltered (gdb_stdlog
,
3598 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3599 (unsigned long) type
,
3600 (unsigned long) cnt
,
3601 (unsigned long) from_tty
,
3602 (unsigned long) retval
);
3607 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3611 retval
= debug_target
.to_region_ok_for_hw_watchpoint (addr
, len
);
3613 fprintf_unfiltered (gdb_stdlog
,
3614 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3615 core_addr_to_string (addr
), (unsigned long) len
,
3616 core_addr_to_string (retval
));
3621 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int rw
,
3622 struct expression
*cond
)
3626 retval
= debug_target
.to_can_accel_watchpoint_condition (addr
, len
,
3629 fprintf_unfiltered (gdb_stdlog
,
3630 "target_can_accel_watchpoint_condition "
3631 "(%s, %d, %d, %s) = %ld\n",
3632 core_addr_to_string (addr
), len
, rw
,
3633 host_address_to_string (cond
), (unsigned long) retval
);
3638 debug_to_stopped_by_watchpoint (void)
3642 retval
= debug_target
.to_stopped_by_watchpoint ();
3644 fprintf_unfiltered (gdb_stdlog
,
3645 "target_stopped_by_watchpoint () = %ld\n",
3646 (unsigned long) retval
);
3651 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3655 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3657 fprintf_unfiltered (gdb_stdlog
,
3658 "target_stopped_data_address ([%s]) = %ld\n",
3659 core_addr_to_string (*addr
),
3660 (unsigned long)retval
);
3665 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3667 CORE_ADDR start
, int length
)
3671 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3674 fprintf_filtered (gdb_stdlog
,
3675 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3676 core_addr_to_string (addr
), core_addr_to_string (start
),
3682 debug_to_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
3683 struct bp_target_info
*bp_tgt
)
3687 retval
= debug_target
.to_insert_hw_breakpoint (gdbarch
, bp_tgt
);
3689 fprintf_unfiltered (gdb_stdlog
,
3690 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3691 core_addr_to_string (bp_tgt
->placed_address
),
3692 (unsigned long) retval
);
3697 debug_to_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
3698 struct bp_target_info
*bp_tgt
)
3702 retval
= debug_target
.to_remove_hw_breakpoint (gdbarch
, bp_tgt
);
3704 fprintf_unfiltered (gdb_stdlog
,
3705 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3706 core_addr_to_string (bp_tgt
->placed_address
),
3707 (unsigned long) retval
);
3712 debug_to_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
3713 struct expression
*cond
)
3717 retval
= debug_target
.to_insert_watchpoint (addr
, len
, type
, cond
);
3719 fprintf_unfiltered (gdb_stdlog
,
3720 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3721 core_addr_to_string (addr
), len
, type
,
3722 host_address_to_string (cond
), (unsigned long) retval
);
3727 debug_to_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
3728 struct expression
*cond
)
3732 retval
= debug_target
.to_remove_watchpoint (addr
, len
, type
, cond
);
3734 fprintf_unfiltered (gdb_stdlog
,
3735 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3736 core_addr_to_string (addr
), len
, type
,
3737 host_address_to_string (cond
), (unsigned long) retval
);
3742 debug_to_terminal_init (void)
3744 debug_target
.to_terminal_init ();
3746 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3750 debug_to_terminal_inferior (void)
3752 debug_target
.to_terminal_inferior ();
3754 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3758 debug_to_terminal_ours_for_output (void)
3760 debug_target
.to_terminal_ours_for_output ();
3762 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3766 debug_to_terminal_ours (void)
3768 debug_target
.to_terminal_ours ();
3770 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3774 debug_to_terminal_save_ours (void)
3776 debug_target
.to_terminal_save_ours ();
3778 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3782 debug_to_terminal_info (char *arg
, int from_tty
)
3784 debug_target
.to_terminal_info (arg
, from_tty
);
3786 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3791 debug_to_load (char *args
, int from_tty
)
3793 debug_target
.to_load (args
, from_tty
);
3795 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3799 debug_to_lookup_symbol (char *name
, CORE_ADDR
*addrp
)
3803 retval
= debug_target
.to_lookup_symbol (name
, addrp
);
3805 fprintf_unfiltered (gdb_stdlog
, "target_lookup_symbol (%s, xxx)\n", name
);
3811 debug_to_post_startup_inferior (ptid_t ptid
)
3813 debug_target
.to_post_startup_inferior (ptid
);
3815 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3820 debug_to_insert_fork_catchpoint (int pid
)
3824 retval
= debug_target
.to_insert_fork_catchpoint (pid
);
3826 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
3833 debug_to_remove_fork_catchpoint (int pid
)
3837 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
3839 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3846 debug_to_insert_vfork_catchpoint (int pid
)
3850 retval
= debug_target
.to_insert_vfork_catchpoint (pid
);
3852 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
3859 debug_to_remove_vfork_catchpoint (int pid
)
3863 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
3865 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3872 debug_to_insert_exec_catchpoint (int pid
)
3876 retval
= debug_target
.to_insert_exec_catchpoint (pid
);
3878 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
3885 debug_to_remove_exec_catchpoint (int pid
)
3889 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
3891 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3898 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
3902 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
3904 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3905 pid
, wait_status
, *exit_status
, has_exited
);
3911 debug_to_can_run (void)
3915 retval
= debug_target
.to_can_run ();
3917 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3923 debug_to_notice_signals (ptid_t ptid
)
3925 debug_target
.to_notice_signals (ptid
);
3927 fprintf_unfiltered (gdb_stdlog
, "target_notice_signals (%d)\n",
3931 static struct gdbarch
*
3932 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3934 struct gdbarch
*retval
;
3936 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3938 fprintf_unfiltered (gdb_stdlog
,
3939 "target_thread_architecture (%s) = %s [%s]\n",
3940 target_pid_to_str (ptid
),
3941 host_address_to_string (retval
),
3942 gdbarch_bfd_arch_info (retval
)->printable_name
);
3947 debug_to_stop (ptid_t ptid
)
3949 debug_target
.to_stop (ptid
);
3951 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
3952 target_pid_to_str (ptid
));
3956 debug_to_rcmd (char *command
,
3957 struct ui_file
*outbuf
)
3959 debug_target
.to_rcmd (command
, outbuf
);
3960 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
3964 debug_to_pid_to_exec_file (int pid
)
3968 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
3970 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
3977 setup_target_debug (void)
3979 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3981 current_target
.to_open
= debug_to_open
;
3982 current_target
.to_post_attach
= debug_to_post_attach
;
3983 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
3984 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
3985 current_target
.to_files_info
= debug_to_files_info
;
3986 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
3987 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
3988 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
3989 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
3990 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
3991 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
3992 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
3993 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
3994 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
3995 current_target
.to_watchpoint_addr_within_range
3996 = debug_to_watchpoint_addr_within_range
;
3997 current_target
.to_region_ok_for_hw_watchpoint
3998 = debug_to_region_ok_for_hw_watchpoint
;
3999 current_target
.to_can_accel_watchpoint_condition
4000 = debug_to_can_accel_watchpoint_condition
;
4001 current_target
.to_terminal_init
= debug_to_terminal_init
;
4002 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
4003 current_target
.to_terminal_ours_for_output
4004 = debug_to_terminal_ours_for_output
;
4005 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4006 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4007 current_target
.to_terminal_info
= debug_to_terminal_info
;
4008 current_target
.to_load
= debug_to_load
;
4009 current_target
.to_lookup_symbol
= debug_to_lookup_symbol
;
4010 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4011 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4012 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4013 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4014 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4015 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4016 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4017 current_target
.to_has_exited
= debug_to_has_exited
;
4018 current_target
.to_can_run
= debug_to_can_run
;
4019 current_target
.to_notice_signals
= debug_to_notice_signals
;
4020 current_target
.to_stop
= debug_to_stop
;
4021 current_target
.to_rcmd
= debug_to_rcmd
;
4022 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4023 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4027 static char targ_desc
[] =
4028 "Names of targets and files being debugged.\nShows the entire \
4029 stack of targets currently in use (including the exec-file,\n\
4030 core-file, and process, if any), as well as the symbol file name.";
4033 do_monitor_command (char *cmd
,
4036 if ((current_target
.to_rcmd
4037 == (void (*) (char *, struct ui_file
*)) tcomplain
)
4038 || (current_target
.to_rcmd
== debug_to_rcmd
4039 && (debug_target
.to_rcmd
4040 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
4041 error (_("\"monitor\" command not supported by this target."));
4042 target_rcmd (cmd
, gdb_stdtarg
);
4045 /* Print the name of each layers of our target stack. */
4048 maintenance_print_target_stack (char *cmd
, int from_tty
)
4050 struct target_ops
*t
;
4052 printf_filtered (_("The current target stack is:\n"));
4054 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4056 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4060 /* Controls if async mode is permitted. */
4061 int target_async_permitted
= 0;
4063 /* The set command writes to this variable. If the inferior is
4064 executing, linux_nat_async_permitted is *not* updated. */
4065 static int target_async_permitted_1
= 0;
4068 set_maintenance_target_async_permitted (char *args
, int from_tty
,
4069 struct cmd_list_element
*c
)
4071 if (have_live_inferiors ())
4073 target_async_permitted_1
= target_async_permitted
;
4074 error (_("Cannot change this setting while the inferior is running."));
4077 target_async_permitted
= target_async_permitted_1
;
4081 show_maintenance_target_async_permitted (struct ui_file
*file
, int from_tty
,
4082 struct cmd_list_element
*c
,
4085 fprintf_filtered (file
,
4086 _("Controlling the inferior in "
4087 "asynchronous mode is %s.\n"), value
);
4090 /* Temporary copies of permission settings. */
4092 static int may_write_registers_1
= 1;
4093 static int may_write_memory_1
= 1;
4094 static int may_insert_breakpoints_1
= 1;
4095 static int may_insert_tracepoints_1
= 1;
4096 static int may_insert_fast_tracepoints_1
= 1;
4097 static int may_stop_1
= 1;
4099 /* Make the user-set values match the real values again. */
4102 update_target_permissions (void)
4104 may_write_registers_1
= may_write_registers
;
4105 may_write_memory_1
= may_write_memory
;
4106 may_insert_breakpoints_1
= may_insert_breakpoints
;
4107 may_insert_tracepoints_1
= may_insert_tracepoints
;
4108 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4109 may_stop_1
= may_stop
;
4112 /* The one function handles (most of) the permission flags in the same
4116 set_target_permissions (char *args
, int from_tty
,
4117 struct cmd_list_element
*c
)
4119 if (target_has_execution
)
4121 update_target_permissions ();
4122 error (_("Cannot change this setting while the inferior is running."));
4125 /* Make the real values match the user-changed values. */
4126 may_write_registers
= may_write_registers_1
;
4127 may_insert_breakpoints
= may_insert_breakpoints_1
;
4128 may_insert_tracepoints
= may_insert_tracepoints_1
;
4129 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4130 may_stop
= may_stop_1
;
4131 update_observer_mode ();
4134 /* Set memory write permission independently of observer mode. */
4137 set_write_memory_permission (char *args
, int from_tty
,
4138 struct cmd_list_element
*c
)
4140 /* Make the real values match the user-changed values. */
4141 may_write_memory
= may_write_memory_1
;
4142 update_observer_mode ();
4147 initialize_targets (void)
4149 init_dummy_target ();
4150 push_target (&dummy_target
);
4152 add_info ("target", target_info
, targ_desc
);
4153 add_info ("files", target_info
, targ_desc
);
4155 add_setshow_zinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4156 Set target debugging."), _("\
4157 Show target debugging."), _("\
4158 When non-zero, target debugging is enabled. Higher numbers are more\n\
4159 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4163 &setdebuglist
, &showdebuglist
);
4165 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4166 &trust_readonly
, _("\
4167 Set mode for reading from readonly sections."), _("\
4168 Show mode for reading from readonly sections."), _("\
4169 When this mode is on, memory reads from readonly sections (such as .text)\n\
4170 will be read from the object file instead of from the target. This will\n\
4171 result in significant performance improvement for remote targets."),
4173 show_trust_readonly
,
4174 &setlist
, &showlist
);
4176 add_com ("monitor", class_obscure
, do_monitor_command
,
4177 _("Send a command to the remote monitor (remote targets only)."));
4179 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4180 _("Print the name of each layer of the internal target stack."),
4181 &maintenanceprintlist
);
4183 add_setshow_boolean_cmd ("target-async", no_class
,
4184 &target_async_permitted_1
, _("\
4185 Set whether gdb controls the inferior in asynchronous mode."), _("\
4186 Show whether gdb controls the inferior in asynchronous mode."), _("\
4187 Tells gdb whether to control the inferior in asynchronous mode."),
4188 set_maintenance_target_async_permitted
,
4189 show_maintenance_target_async_permitted
,
4193 add_setshow_boolean_cmd ("stack-cache", class_support
,
4194 &stack_cache_enabled_p_1
, _("\
4195 Set cache use for stack access."), _("\
4196 Show cache use for stack access."), _("\
4197 When on, use the data cache for all stack access, regardless of any\n\
4198 configured memory regions. This improves remote performance significantly.\n\
4199 By default, caching for stack access is on."),
4200 set_stack_cache_enabled_p
,
4201 show_stack_cache_enabled_p
,
4202 &setlist
, &showlist
);
4204 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4205 &may_write_registers_1
, _("\
4206 Set permission to write into registers."), _("\
4207 Show permission to write into registers."), _("\
4208 When this permission is on, GDB may write into the target's registers.\n\
4209 Otherwise, any sort of write attempt will result in an error."),
4210 set_target_permissions
, NULL
,
4211 &setlist
, &showlist
);
4213 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4214 &may_write_memory_1
, _("\
4215 Set permission to write into target memory."), _("\
4216 Show permission to write into target memory."), _("\
4217 When this permission is on, GDB may write into the target's memory.\n\
4218 Otherwise, any sort of write attempt will result in an error."),
4219 set_write_memory_permission
, NULL
,
4220 &setlist
, &showlist
);
4222 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4223 &may_insert_breakpoints_1
, _("\
4224 Set permission to insert breakpoints in the target."), _("\
4225 Show permission to insert breakpoints in the target."), _("\
4226 When this permission is on, GDB may insert breakpoints in the program.\n\
4227 Otherwise, any sort of insertion attempt will result in an error."),
4228 set_target_permissions
, NULL
,
4229 &setlist
, &showlist
);
4231 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4232 &may_insert_tracepoints_1
, _("\
4233 Set permission to insert tracepoints in the target."), _("\
4234 Show permission to insert tracepoints in the target."), _("\
4235 When this permission is on, GDB may insert tracepoints in the program.\n\
4236 Otherwise, any sort of insertion attempt will result in an error."),
4237 set_target_permissions
, NULL
,
4238 &setlist
, &showlist
);
4240 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4241 &may_insert_fast_tracepoints_1
, _("\
4242 Set permission to insert fast tracepoints in the target."), _("\
4243 Show permission to insert fast tracepoints in the target."), _("\
4244 When this permission is on, GDB may insert fast tracepoints.\n\
4245 Otherwise, any sort of insertion attempt will result in an error."),
4246 set_target_permissions
, NULL
,
4247 &setlist
, &showlist
);
4249 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4251 Set permission to interrupt or signal the target."), _("\
4252 Show permission to interrupt or signal the target."), _("\
4253 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4254 Otherwise, any attempt to interrupt or stop will be ignored."),
4255 set_target_permissions
, NULL
,
4256 &setlist
, &showlist
);
4259 target_dcache
= dcache_init ();