1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
47 static void target_info (char *, int);
49 static void kill_or_be_killed (int);
51 static void default_terminal_info (char *, int);
53 static int default_watchpoint_addr_within_range (struct target_ops
*,
54 CORE_ADDR
, CORE_ADDR
, int);
56 static int default_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
58 static int nosymbol (char *, CORE_ADDR
*);
60 static void tcomplain (void) ATTR_NORETURN
;
62 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
64 static int return_zero (void);
66 static int return_one (void);
68 static int return_minus_one (void);
70 void target_ignore (void);
72 static void target_command (char *, int);
74 static struct target_ops
*find_default_run_target (char *);
76 static void nosupport_runtime (void);
78 static LONGEST
default_xfer_partial (struct target_ops
*ops
,
79 enum target_object object
,
80 const char *annex
, gdb_byte
*readbuf
,
81 const gdb_byte
*writebuf
,
82 ULONGEST offset
, LONGEST len
);
84 static LONGEST
current_xfer_partial (struct target_ops
*ops
,
85 enum target_object object
,
86 const char *annex
, gdb_byte
*readbuf
,
87 const gdb_byte
*writebuf
,
88 ULONGEST offset
, LONGEST len
);
90 static LONGEST
target_xfer_partial (struct target_ops
*ops
,
91 enum target_object object
,
93 void *readbuf
, const void *writebuf
,
94 ULONGEST offset
, LONGEST len
);
96 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
99 static void init_dummy_target (void);
101 static struct target_ops debug_target
;
103 static void debug_to_open (char *, int);
105 static void debug_to_prepare_to_store (struct regcache
*);
107 static void debug_to_files_info (struct target_ops
*);
109 static int debug_to_insert_breakpoint (struct gdbarch
*,
110 struct bp_target_info
*);
112 static int debug_to_remove_breakpoint (struct gdbarch
*,
113 struct bp_target_info
*);
115 static int debug_to_can_use_hw_breakpoint (int, int, int);
117 static int debug_to_insert_hw_breakpoint (struct gdbarch
*,
118 struct bp_target_info
*);
120 static int debug_to_remove_hw_breakpoint (struct gdbarch
*,
121 struct bp_target_info
*);
123 static int debug_to_insert_watchpoint (CORE_ADDR
, int, int);
125 static int debug_to_remove_watchpoint (CORE_ADDR
, int, int);
127 static int debug_to_stopped_by_watchpoint (void);
129 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
131 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
132 CORE_ADDR
, CORE_ADDR
, int);
134 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
136 static void debug_to_terminal_init (void);
138 static void debug_to_terminal_inferior (void);
140 static void debug_to_terminal_ours_for_output (void);
142 static void debug_to_terminal_save_ours (void);
144 static void debug_to_terminal_ours (void);
146 static void debug_to_terminal_info (char *, int);
148 static void debug_to_load (char *, int);
150 static int debug_to_lookup_symbol (char *, CORE_ADDR
*);
152 static int debug_to_can_run (void);
154 static void debug_to_notice_signals (ptid_t
);
156 static void debug_to_stop (ptid_t
);
158 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
159 wierd and mysterious ways. Putting the variable here lets those
160 wierd and mysterious ways keep building while they are being
161 converted to the inferior inheritance structure. */
162 struct target_ops deprecated_child_ops
;
164 /* Pointer to array of target architecture structures; the size of the
165 array; the current index into the array; the allocated size of the
167 struct target_ops
**target_structs
;
168 unsigned target_struct_size
;
169 unsigned target_struct_index
;
170 unsigned target_struct_allocsize
;
171 #define DEFAULT_ALLOCSIZE 10
173 /* The initial current target, so that there is always a semi-valid
176 static struct target_ops dummy_target
;
178 /* Top of target stack. */
180 static struct target_ops
*target_stack
;
182 /* The target structure we are currently using to talk to a process
183 or file or whatever "inferior" we have. */
185 struct target_ops current_target
;
187 /* Command list for target. */
189 static struct cmd_list_element
*targetlist
= NULL
;
191 /* Nonzero if we should trust readonly sections from the
192 executable when reading memory. */
194 static int trust_readonly
= 0;
196 /* Nonzero if we should show true memory content including
197 memory breakpoint inserted by gdb. */
199 static int show_memory_breakpoints
= 0;
201 /* Non-zero if we want to see trace of target level stuff. */
203 static int targetdebug
= 0;
205 show_targetdebug (struct ui_file
*file
, int from_tty
,
206 struct cmd_list_element
*c
, const char *value
)
208 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
211 static void setup_target_debug (void);
213 DCACHE
*target_dcache
;
215 /* The user just typed 'target' without the name of a target. */
218 target_command (char *arg
, int from_tty
)
220 fputs_filtered ("Argument required (target name). Try `help target'\n",
224 /* Default target_has_* methods for process_stratum targets. */
227 default_child_has_all_memory (struct target_ops
*ops
)
229 /* If no inferior selected, then we can't read memory here. */
230 if (ptid_equal (inferior_ptid
, null_ptid
))
237 default_child_has_memory (struct target_ops
*ops
)
239 /* If no inferior selected, then we can't read memory here. */
240 if (ptid_equal (inferior_ptid
, null_ptid
))
247 default_child_has_stack (struct target_ops
*ops
)
249 /* If no inferior selected, there's no stack. */
250 if (ptid_equal (inferior_ptid
, null_ptid
))
257 default_child_has_registers (struct target_ops
*ops
)
259 /* Can't read registers from no inferior. */
260 if (ptid_equal (inferior_ptid
, null_ptid
))
267 default_child_has_execution (struct target_ops
*ops
)
269 /* If there's no thread selected, then we can't make it run through
271 if (ptid_equal (inferior_ptid
, null_ptid
))
279 target_has_all_memory_1 (void)
281 struct target_ops
*t
;
283 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
284 if (t
->to_has_all_memory (t
))
291 target_has_memory_1 (void)
293 struct target_ops
*t
;
295 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
296 if (t
->to_has_memory (t
))
303 target_has_stack_1 (void)
305 struct target_ops
*t
;
307 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
308 if (t
->to_has_stack (t
))
315 target_has_registers_1 (void)
317 struct target_ops
*t
;
319 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
320 if (t
->to_has_registers (t
))
327 target_has_execution_1 (void)
329 struct target_ops
*t
;
331 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
332 if (t
->to_has_execution (t
))
338 /* Add a possible target architecture to the list. */
341 add_target (struct target_ops
*t
)
343 /* Provide default values for all "must have" methods. */
344 if (t
->to_xfer_partial
== NULL
)
345 t
->to_xfer_partial
= default_xfer_partial
;
347 if (t
->to_has_all_memory
== NULL
)
348 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
350 if (t
->to_has_memory
== NULL
)
351 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
353 if (t
->to_has_stack
== NULL
)
354 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
356 if (t
->to_has_registers
== NULL
)
357 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
359 if (t
->to_has_execution
== NULL
)
360 t
->to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
364 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
365 target_structs
= (struct target_ops
**) xmalloc
366 (target_struct_allocsize
* sizeof (*target_structs
));
368 if (target_struct_size
>= target_struct_allocsize
)
370 target_struct_allocsize
*= 2;
371 target_structs
= (struct target_ops
**)
372 xrealloc ((char *) target_structs
,
373 target_struct_allocsize
* sizeof (*target_structs
));
375 target_structs
[target_struct_size
++] = t
;
377 if (targetlist
== NULL
)
378 add_prefix_cmd ("target", class_run
, target_command
, _("\
379 Connect to a target machine or process.\n\
380 The first argument is the type or protocol of the target machine.\n\
381 Remaining arguments are interpreted by the target protocol. For more\n\
382 information on the arguments for a particular protocol, type\n\
383 `help target ' followed by the protocol name."),
384 &targetlist
, "target ", 0, &cmdlist
);
385 add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
398 struct target_ops
*t
;
400 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
401 if (t
->to_kill
!= NULL
)
404 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
414 target_load (char *arg
, int from_tty
)
416 dcache_invalidate (target_dcache
);
417 (*current_target
.to_load
) (arg
, from_tty
);
421 target_create_inferior (char *exec_file
, char *args
,
422 char **env
, int from_tty
)
424 struct target_ops
*t
;
425 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
427 if (t
->to_create_inferior
!= NULL
)
429 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
431 fprintf_unfiltered (gdb_stdlog
,
432 "target_create_inferior (%s, %s, xxx, %d)\n",
433 exec_file
, args
, from_tty
);
438 internal_error (__FILE__
, __LINE__
,
439 "could not find a target to create inferior");
443 target_terminal_inferior (void)
445 /* A background resume (``run&'') should leave GDB in control of the
447 if (target_is_async_p () && !sync_execution
)
450 /* If GDB is resuming the inferior in the foreground, install
451 inferior's terminal modes. */
452 (*current_target
.to_terminal_inferior
) ();
456 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
457 struct target_ops
*t
)
459 errno
= EIO
; /* Can't read/write this location */
460 return 0; /* No bytes handled */
466 error (_("You can't do that when your target is `%s'"),
467 current_target
.to_shortname
);
473 error (_("You can't do that without a process to debug."));
477 nosymbol (char *name
, CORE_ADDR
*addrp
)
479 return 1; /* Symbol does not exist in target env */
483 nosupport_runtime (void)
485 if (ptid_equal (inferior_ptid
, null_ptid
))
488 error (_("No run-time support for this"));
493 default_terminal_info (char *args
, int from_tty
)
495 printf_unfiltered (_("No saved terminal information.\n"));
498 /* This is the default target_create_inferior and target_attach function.
499 If the current target is executing, it asks whether to kill it off.
500 If this function returns without calling error(), it has killed off
501 the target, and the operation should be attempted. */
504 kill_or_be_killed (int from_tty
)
506 if (target_has_execution
)
508 printf_unfiltered (_("You are already running a program:\n"));
509 target_files_info ();
510 if (query (_("Kill it? ")))
513 if (target_has_execution
)
514 error (_("Killing the program did not help."));
519 error (_("Program not killed."));
525 /* A default implementation for the to_get_ada_task_ptid target method.
527 This function builds the PTID by using both LWP and TID as part of
528 the PTID lwp and tid elements. The pid used is the pid of the
532 default_get_ada_task_ptid (long lwp
, long tid
)
534 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
537 /* Go through the target stack from top to bottom, copying over zero
538 entries in current_target, then filling in still empty entries. In
539 effect, we are doing class inheritance through the pushed target
542 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
543 is currently implemented, is that it discards any knowledge of
544 which target an inherited method originally belonged to.
545 Consequently, new new target methods should instead explicitly and
546 locally search the target stack for the target that can handle the
550 update_current_target (void)
552 struct target_ops
*t
;
554 /* First, reset current's contents. */
555 memset (¤t_target
, 0, sizeof (current_target
));
557 #define INHERIT(FIELD, TARGET) \
558 if (!current_target.FIELD) \
559 current_target.FIELD = (TARGET)->FIELD
561 for (t
= target_stack
; t
; t
= t
->beneath
)
563 INHERIT (to_shortname
, t
);
564 INHERIT (to_longname
, t
);
566 /* Do not inherit to_open. */
567 /* Do not inherit to_close. */
568 /* Do not inherit to_attach. */
569 INHERIT (to_post_attach
, t
);
570 INHERIT (to_attach_no_wait
, t
);
571 /* Do not inherit to_detach. */
572 /* Do not inherit to_disconnect. */
573 /* Do not inherit to_resume. */
574 /* Do not inherit to_wait. */
575 /* Do not inherit to_fetch_registers. */
576 /* Do not inherit to_store_registers. */
577 INHERIT (to_prepare_to_store
, t
);
578 INHERIT (deprecated_xfer_memory
, t
);
579 INHERIT (to_files_info
, t
);
580 INHERIT (to_insert_breakpoint
, t
);
581 INHERIT (to_remove_breakpoint
, t
);
582 INHERIT (to_can_use_hw_breakpoint
, t
);
583 INHERIT (to_insert_hw_breakpoint
, t
);
584 INHERIT (to_remove_hw_breakpoint
, t
);
585 INHERIT (to_insert_watchpoint
, t
);
586 INHERIT (to_remove_watchpoint
, t
);
587 INHERIT (to_stopped_data_address
, t
);
588 INHERIT (to_have_steppable_watchpoint
, t
);
589 INHERIT (to_have_continuable_watchpoint
, t
);
590 INHERIT (to_stopped_by_watchpoint
, t
);
591 INHERIT (to_watchpoint_addr_within_range
, t
);
592 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
593 INHERIT (to_terminal_init
, t
);
594 INHERIT (to_terminal_inferior
, t
);
595 INHERIT (to_terminal_ours_for_output
, t
);
596 INHERIT (to_terminal_ours
, t
);
597 INHERIT (to_terminal_save_ours
, t
);
598 INHERIT (to_terminal_info
, t
);
599 /* Do not inherit to_kill. */
600 INHERIT (to_load
, t
);
601 INHERIT (to_lookup_symbol
, t
);
602 /* Do no inherit to_create_inferior. */
603 INHERIT (to_post_startup_inferior
, t
);
604 INHERIT (to_acknowledge_created_inferior
, t
);
605 INHERIT (to_insert_fork_catchpoint
, t
);
606 INHERIT (to_remove_fork_catchpoint
, t
);
607 INHERIT (to_insert_vfork_catchpoint
, t
);
608 INHERIT (to_remove_vfork_catchpoint
, t
);
609 /* Do not inherit to_follow_fork. */
610 INHERIT (to_insert_exec_catchpoint
, t
);
611 INHERIT (to_remove_exec_catchpoint
, t
);
612 INHERIT (to_has_exited
, t
);
613 /* Do not inherit to_mourn_inferiour. */
614 INHERIT (to_can_run
, t
);
615 INHERIT (to_notice_signals
, t
);
616 /* Do not inherit to_thread_alive. */
617 /* Do not inherit to_find_new_threads. */
618 /* Do not inherit to_pid_to_str. */
619 INHERIT (to_extra_thread_info
, t
);
620 INHERIT (to_stop
, t
);
621 /* Do not inherit to_xfer_partial. */
622 INHERIT (to_rcmd
, t
);
623 INHERIT (to_pid_to_exec_file
, t
);
624 INHERIT (to_log_command
, t
);
625 INHERIT (to_stratum
, t
);
626 /* Do not inherit to_has_all_memory */
627 /* Do not inherit to_has_memory */
628 /* Do not inherit to_has_stack */
629 /* Do not inherit to_has_registers */
630 /* Do not inherit to_has_execution */
631 INHERIT (to_has_thread_control
, t
);
632 INHERIT (to_can_async_p
, t
);
633 INHERIT (to_is_async_p
, t
);
634 INHERIT (to_async
, t
);
635 INHERIT (to_async_mask
, t
);
636 INHERIT (to_find_memory_regions
, t
);
637 INHERIT (to_make_corefile_notes
, t
);
638 /* Do not inherit to_get_thread_local_address. */
639 INHERIT (to_can_execute_reverse
, t
);
640 INHERIT (to_thread_architecture
, t
);
641 /* Do not inherit to_read_description. */
642 INHERIT (to_get_ada_task_ptid
, t
);
643 /* Do not inherit to_search_memory. */
644 INHERIT (to_supports_multi_process
, t
);
645 INHERIT (to_magic
, t
);
646 /* Do not inherit to_memory_map. */
647 /* Do not inherit to_flash_erase. */
648 /* Do not inherit to_flash_done. */
652 /* Clean up a target struct so it no longer has any zero pointers in
653 it. Some entries are defaulted to a method that print an error,
654 others are hard-wired to a standard recursive default. */
656 #define de_fault(field, value) \
657 if (!current_target.field) \
658 current_target.field = value
661 (void (*) (char *, int))
666 de_fault (to_post_attach
,
669 de_fault (to_prepare_to_store
,
670 (void (*) (struct regcache
*))
672 de_fault (deprecated_xfer_memory
,
673 (int (*) (CORE_ADDR
, gdb_byte
*, int, int, struct mem_attrib
*, struct target_ops
*))
675 de_fault (to_files_info
,
676 (void (*) (struct target_ops
*))
678 de_fault (to_insert_breakpoint
,
679 memory_insert_breakpoint
);
680 de_fault (to_remove_breakpoint
,
681 memory_remove_breakpoint
);
682 de_fault (to_can_use_hw_breakpoint
,
683 (int (*) (int, int, int))
685 de_fault (to_insert_hw_breakpoint
,
686 (int (*) (struct gdbarch
*, struct bp_target_info
*))
688 de_fault (to_remove_hw_breakpoint
,
689 (int (*) (struct gdbarch
*, struct bp_target_info
*))
691 de_fault (to_insert_watchpoint
,
692 (int (*) (CORE_ADDR
, int, int))
694 de_fault (to_remove_watchpoint
,
695 (int (*) (CORE_ADDR
, int, int))
697 de_fault (to_stopped_by_watchpoint
,
700 de_fault (to_stopped_data_address
,
701 (int (*) (struct target_ops
*, CORE_ADDR
*))
703 de_fault (to_watchpoint_addr_within_range
,
704 default_watchpoint_addr_within_range
);
705 de_fault (to_region_ok_for_hw_watchpoint
,
706 default_region_ok_for_hw_watchpoint
);
707 de_fault (to_terminal_init
,
710 de_fault (to_terminal_inferior
,
713 de_fault (to_terminal_ours_for_output
,
716 de_fault (to_terminal_ours
,
719 de_fault (to_terminal_save_ours
,
722 de_fault (to_terminal_info
,
723 default_terminal_info
);
725 (void (*) (char *, int))
727 de_fault (to_lookup_symbol
,
728 (int (*) (char *, CORE_ADDR
*))
730 de_fault (to_post_startup_inferior
,
733 de_fault (to_acknowledge_created_inferior
,
736 de_fault (to_insert_fork_catchpoint
,
739 de_fault (to_remove_fork_catchpoint
,
742 de_fault (to_insert_vfork_catchpoint
,
745 de_fault (to_remove_vfork_catchpoint
,
748 de_fault (to_insert_exec_catchpoint
,
751 de_fault (to_remove_exec_catchpoint
,
754 de_fault (to_has_exited
,
755 (int (*) (int, int, int *))
757 de_fault (to_can_run
,
759 de_fault (to_notice_signals
,
762 de_fault (to_extra_thread_info
,
763 (char *(*) (struct thread_info
*))
768 current_target
.to_xfer_partial
= current_xfer_partial
;
770 (void (*) (char *, struct ui_file
*))
772 de_fault (to_pid_to_exec_file
,
776 (void (*) (void (*) (enum inferior_event_type
, void*), void*))
778 de_fault (to_async_mask
,
781 de_fault (to_thread_architecture
,
782 default_thread_architecture
);
783 current_target
.to_read_description
= NULL
;
784 de_fault (to_get_ada_task_ptid
,
785 (ptid_t (*) (long, long))
786 default_get_ada_task_ptid
);
787 de_fault (to_supports_multi_process
,
792 /* Finally, position the target-stack beneath the squashed
793 "current_target". That way code looking for a non-inherited
794 target method can quickly and simply find it. */
795 current_target
.beneath
= target_stack
;
798 setup_target_debug ();
801 /* Push a new target type into the stack of the existing target accessors,
802 possibly superseding some of the existing accessors.
804 Result is zero if the pushed target ended up on top of the stack,
805 nonzero if at least one target is on top of it.
807 Rather than allow an empty stack, we always have the dummy target at
808 the bottom stratum, so we can call the function vectors without
812 push_target (struct target_ops
*t
)
814 struct target_ops
**cur
;
816 /* Check magic number. If wrong, it probably means someone changed
817 the struct definition, but not all the places that initialize one. */
818 if (t
->to_magic
!= OPS_MAGIC
)
820 fprintf_unfiltered (gdb_stderr
,
821 "Magic number of %s target struct wrong\n",
823 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
826 /* Find the proper stratum to install this target in. */
827 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
829 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
833 /* If there's already targets at this stratum, remove them. */
834 /* FIXME: cagney/2003-10-15: I think this should be popping all
835 targets to CUR, and not just those at this stratum level. */
836 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
838 /* There's already something at this stratum level. Close it,
839 and un-hook it from the stack. */
840 struct target_ops
*tmp
= (*cur
);
841 (*cur
) = (*cur
)->beneath
;
843 target_close (tmp
, 0);
846 /* We have removed all targets in our stratum, now add the new one. */
850 update_current_target ();
853 return (t
!= target_stack
);
856 /* Remove a target_ops vector from the stack, wherever it may be.
857 Return how many times it was removed (0 or 1). */
860 unpush_target (struct target_ops
*t
)
862 struct target_ops
**cur
;
863 struct target_ops
*tmp
;
865 if (t
->to_stratum
== dummy_stratum
)
866 internal_error (__FILE__
, __LINE__
,
867 "Attempt to unpush the dummy target");
869 /* Look for the specified target. Note that we assume that a target
870 can only occur once in the target stack. */
872 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
879 return 0; /* Didn't find target_ops, quit now */
881 /* NOTE: cagney/2003-12-06: In '94 the close call was made
882 unconditional by moving it to before the above check that the
883 target was in the target stack (something about "Change the way
884 pushing and popping of targets work to support target overlays
885 and inheritance"). This doesn't make much sense - only open
886 targets should be closed. */
889 /* Unchain the target */
891 (*cur
) = (*cur
)->beneath
;
894 update_current_target ();
902 target_close (target_stack
, 0); /* Let it clean up */
903 if (unpush_target (target_stack
) == 1)
906 fprintf_unfiltered (gdb_stderr
,
907 "pop_target couldn't find target %s\n",
908 current_target
.to_shortname
);
909 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
913 pop_all_targets_above (enum strata above_stratum
, int quitting
)
915 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
917 target_close (target_stack
, quitting
);
918 if (!unpush_target (target_stack
))
920 fprintf_unfiltered (gdb_stderr
,
921 "pop_all_targets couldn't find target %s\n",
922 target_stack
->to_shortname
);
923 internal_error (__FILE__
, __LINE__
,
924 _("failed internal consistency check"));
931 pop_all_targets (int quitting
)
933 pop_all_targets_above (dummy_stratum
, quitting
);
936 /* Using the objfile specified in OBJFILE, find the address for the
937 current thread's thread-local storage with offset OFFSET. */
939 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
941 volatile CORE_ADDR addr
= 0;
942 struct target_ops
*target
;
944 for (target
= current_target
.beneath
;
946 target
= target
->beneath
)
948 if (target
->to_get_thread_local_address
!= NULL
)
953 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch
))
955 ptid_t ptid
= inferior_ptid
;
956 volatile struct gdb_exception ex
;
958 TRY_CATCH (ex
, RETURN_MASK_ALL
)
962 /* Fetch the load module address for this objfile. */
963 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch
,
965 /* If it's 0, throw the appropriate exception. */
967 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
968 _("TLS load module not found"));
970 addr
= target
->to_get_thread_local_address (target
, ptid
, lm_addr
, offset
);
972 /* If an error occurred, print TLS related messages here. Otherwise,
973 throw the error to some higher catcher. */
976 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
980 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
981 error (_("Cannot find thread-local variables in this thread library."));
983 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
984 if (objfile_is_library
)
985 error (_("Cannot find shared library `%s' in dynamic"
986 " linker's load module list"), objfile
->name
);
988 error (_("Cannot find executable file `%s' in dynamic"
989 " linker's load module list"), objfile
->name
);
991 case TLS_NOT_ALLOCATED_YET_ERROR
:
992 if (objfile_is_library
)
993 error (_("The inferior has not yet allocated storage for"
994 " thread-local variables in\n"
995 "the shared library `%s'\n"
997 objfile
->name
, target_pid_to_str (ptid
));
999 error (_("The inferior has not yet allocated storage for"
1000 " thread-local variables in\n"
1001 "the executable `%s'\n"
1003 objfile
->name
, target_pid_to_str (ptid
));
1005 case TLS_GENERIC_ERROR
:
1006 if (objfile_is_library
)
1007 error (_("Cannot find thread-local storage for %s, "
1008 "shared library %s:\n%s"),
1009 target_pid_to_str (ptid
),
1010 objfile
->name
, ex
.message
);
1012 error (_("Cannot find thread-local storage for %s, "
1013 "executable file %s:\n%s"),
1014 target_pid_to_str (ptid
),
1015 objfile
->name
, ex
.message
);
1018 throw_exception (ex
);
1023 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1024 TLS is an ABI-specific thing. But we don't do that yet. */
1026 error (_("Cannot find thread-local variables on this target"));
1032 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1034 /* target_read_string -- read a null terminated string, up to LEN bytes,
1035 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1036 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1037 is responsible for freeing it. Return the number of bytes successfully
1041 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1043 int tlen
, origlen
, offset
, i
;
1047 int buffer_allocated
;
1049 unsigned int nbytes_read
= 0;
1051 gdb_assert (string
);
1053 /* Small for testing. */
1054 buffer_allocated
= 4;
1055 buffer
= xmalloc (buffer_allocated
);
1062 tlen
= MIN (len
, 4 - (memaddr
& 3));
1063 offset
= memaddr
& 3;
1065 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1068 /* The transfer request might have crossed the boundary to an
1069 unallocated region of memory. Retry the transfer, requesting
1073 errcode
= target_read_memory (memaddr
, buf
, 1);
1078 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1081 bytes
= bufptr
- buffer
;
1082 buffer_allocated
*= 2;
1083 buffer
= xrealloc (buffer
, buffer_allocated
);
1084 bufptr
= buffer
+ bytes
;
1087 for (i
= 0; i
< tlen
; i
++)
1089 *bufptr
++ = buf
[i
+ offset
];
1090 if (buf
[i
+ offset
] == '\000')
1092 nbytes_read
+= i
+ 1;
1099 nbytes_read
+= tlen
;
1108 struct target_section_table
*
1109 target_get_section_table (struct target_ops
*target
)
1111 struct target_ops
*t
;
1114 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1116 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1117 if (t
->to_get_section_table
!= NULL
)
1118 return (*t
->to_get_section_table
) (t
);
1123 /* Find a section containing ADDR. */
1125 struct target_section
*
1126 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1128 struct target_section_table
*table
= target_get_section_table (target
);
1129 struct target_section
*secp
;
1134 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1136 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1142 /* Perform a partial memory transfer. The arguments and return
1143 value are just as for target_xfer_partial. */
1146 memory_xfer_partial (struct target_ops
*ops
, void *readbuf
, const void *writebuf
,
1147 ULONGEST memaddr
, LONGEST len
)
1151 struct mem_region
*region
;
1153 /* Zero length requests are ok and require no work. */
1157 /* For accesses to unmapped overlay sections, read directly from
1158 files. Must do this first, as MEMADDR may need adjustment. */
1159 if (readbuf
!= NULL
&& overlay_debugging
)
1161 struct obj_section
*section
= find_pc_overlay (memaddr
);
1162 if (pc_in_unmapped_range (memaddr
, section
))
1164 struct target_section_table
*table
1165 = target_get_section_table (ops
);
1166 const char *section_name
= section
->the_bfd_section
->name
;
1167 memaddr
= overlay_mapped_address (memaddr
, section
);
1168 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1171 table
->sections_end
,
1176 /* Try the executable files, if "trust-readonly-sections" is set. */
1177 if (readbuf
!= NULL
&& trust_readonly
)
1179 struct target_section
*secp
;
1180 struct target_section_table
*table
;
1182 secp
= target_section_by_addr (ops
, memaddr
);
1184 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1187 table
= target_get_section_table (ops
);
1188 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1191 table
->sections_end
,
1196 /* Try GDB's internal data cache. */
1197 region
= lookup_mem_region (memaddr
);
1198 /* region->hi == 0 means there's no upper bound. */
1199 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1202 reg_len
= region
->hi
- memaddr
;
1204 switch (region
->attrib
.mode
)
1207 if (writebuf
!= NULL
)
1212 if (readbuf
!= NULL
)
1217 /* We only support writing to flash during "load" for now. */
1218 if (writebuf
!= NULL
)
1219 error (_("Writing to flash memory forbidden in this context"));
1226 if (region
->attrib
.cache
)
1228 if (readbuf
!= NULL
)
1229 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
, readbuf
,
1232 /* FIXME drow/2006-08-09: If we're going to preserve const
1233 correctness dcache_xfer_memory should take readbuf and
1235 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
,
1242 if (readbuf
&& !show_memory_breakpoints
)
1243 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1248 /* If none of those methods found the memory we wanted, fall back
1249 to a target partial transfer. Normally a single call to
1250 to_xfer_partial is enough; if it doesn't recognize an object
1251 it will call the to_xfer_partial of the next target down.
1252 But for memory this won't do. Memory is the only target
1253 object which can be read from more than one valid target.
1254 A core file, for instance, could have some of memory but
1255 delegate other bits to the target below it. So, we must
1256 manually try all targets. */
1260 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1261 readbuf
, writebuf
, memaddr
, reg_len
);
1265 /* We want to continue past core files to executables, but not
1266 past a running target's memory. */
1267 if (ops
->to_has_all_memory (ops
))
1272 while (ops
!= NULL
);
1274 if (readbuf
&& !show_memory_breakpoints
)
1275 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1277 /* If we still haven't got anything, return the last error. We
1283 restore_show_memory_breakpoints (void *arg
)
1285 show_memory_breakpoints
= (uintptr_t) arg
;
1289 make_show_memory_breakpoints_cleanup (int show
)
1291 int current
= show_memory_breakpoints
;
1292 show_memory_breakpoints
= show
;
1294 return make_cleanup (restore_show_memory_breakpoints
,
1295 (void *) (uintptr_t) current
);
1299 target_xfer_partial (struct target_ops
*ops
,
1300 enum target_object object
, const char *annex
,
1301 void *readbuf
, const void *writebuf
,
1302 ULONGEST offset
, LONGEST len
)
1306 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1308 /* If this is a memory transfer, let the memory-specific code
1309 have a look at it instead. Memory transfers are more
1311 if (object
== TARGET_OBJECT_MEMORY
)
1312 retval
= memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
);
1315 enum target_object raw_object
= object
;
1317 /* If this is a raw memory transfer, request the normal
1318 memory object from other layers. */
1319 if (raw_object
== TARGET_OBJECT_RAW_MEMORY
)
1320 raw_object
= TARGET_OBJECT_MEMORY
;
1322 retval
= ops
->to_xfer_partial (ops
, raw_object
, annex
, readbuf
,
1323 writebuf
, offset
, len
);
1328 const unsigned char *myaddr
= NULL
;
1330 fprintf_unfiltered (gdb_stdlog
,
1331 "%s:target_xfer_partial (%d, %s, %s, %s, %s, %s) = %s",
1334 (annex
? annex
: "(null)"),
1335 host_address_to_string (readbuf
),
1336 host_address_to_string (writebuf
),
1337 core_addr_to_string_nz (offset
),
1338 plongest (len
), plongest (retval
));
1344 if (retval
> 0 && myaddr
!= NULL
)
1348 fputs_unfiltered (", bytes =", gdb_stdlog
);
1349 for (i
= 0; i
< retval
; i
++)
1351 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1353 if (targetdebug
< 2 && i
> 0)
1355 fprintf_unfiltered (gdb_stdlog
, " ...");
1358 fprintf_unfiltered (gdb_stdlog
, "\n");
1361 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1365 fputc_unfiltered ('\n', gdb_stdlog
);
1370 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1371 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1372 if any error occurs.
1374 If an error occurs, no guarantee is made about the contents of the data at
1375 MYADDR. In particular, the caller should not depend upon partial reads
1376 filling the buffer with good data. There is no way for the caller to know
1377 how much good data might have been transfered anyway. Callers that can
1378 deal with partial reads should call target_read (which will retry until
1379 it makes no progress, and then return how much was transferred). */
1382 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1384 /* Dispatch to the topmost target, not the flattened current_target.
1385 Memory accesses check target->to_has_(all_)memory, and the
1386 flattened target doesn't inherit those. */
1387 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1388 myaddr
, memaddr
, len
) == len
)
1395 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
1397 /* Dispatch to the topmost target, not the flattened current_target.
1398 Memory accesses check target->to_has_(all_)memory, and the
1399 flattened target doesn't inherit those. */
1400 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1401 myaddr
, memaddr
, len
) == len
)
1407 /* Fetch the target's memory map. */
1410 target_memory_map (void)
1412 VEC(mem_region_s
) *result
;
1413 struct mem_region
*last_one
, *this_one
;
1415 struct target_ops
*t
;
1418 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1420 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1421 if (t
->to_memory_map
!= NULL
)
1427 result
= t
->to_memory_map (t
);
1431 qsort (VEC_address (mem_region_s
, result
),
1432 VEC_length (mem_region_s
, result
),
1433 sizeof (struct mem_region
), mem_region_cmp
);
1435 /* Check that regions do not overlap. Simultaneously assign
1436 a numbering for the "mem" commands to use to refer to
1439 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1441 this_one
->number
= ix
;
1443 if (last_one
&& last_one
->hi
> this_one
->lo
)
1445 warning (_("Overlapping regions in memory map: ignoring"));
1446 VEC_free (mem_region_s
, result
);
1449 last_one
= this_one
;
1456 target_flash_erase (ULONGEST address
, LONGEST length
)
1458 struct target_ops
*t
;
1460 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1461 if (t
->to_flash_erase
!= NULL
)
1464 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1465 hex_string (address
), phex (length
, 0));
1466 t
->to_flash_erase (t
, address
, length
);
1474 target_flash_done (void)
1476 struct target_ops
*t
;
1478 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1479 if (t
->to_flash_done
!= NULL
)
1482 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1483 t
->to_flash_done (t
);
1491 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1492 struct cmd_list_element
*c
, const char *value
)
1494 fprintf_filtered (file
, _("\
1495 Mode for reading from readonly sections is %s.\n"),
1499 /* More generic transfers. */
1502 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1503 const char *annex
, gdb_byte
*readbuf
,
1504 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1506 if (object
== TARGET_OBJECT_MEMORY
1507 && ops
->deprecated_xfer_memory
!= NULL
)
1508 /* If available, fall back to the target's
1509 "deprecated_xfer_memory" method. */
1513 if (writebuf
!= NULL
)
1515 void *buffer
= xmalloc (len
);
1516 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1517 memcpy (buffer
, writebuf
, len
);
1518 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1519 1/*write*/, NULL
, ops
);
1520 do_cleanups (cleanup
);
1522 if (readbuf
!= NULL
)
1523 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1524 0/*read*/, NULL
, ops
);
1527 else if (xfered
== 0 && errno
== 0)
1528 /* "deprecated_xfer_memory" uses 0, cross checked against
1529 ERRNO as one indication of an error. */
1534 else if (ops
->beneath
!= NULL
)
1535 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1536 readbuf
, writebuf
, offset
, len
);
1541 /* The xfer_partial handler for the topmost target. Unlike the default,
1542 it does not need to handle memory specially; it just passes all
1543 requests down the stack. */
1546 current_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1547 const char *annex
, gdb_byte
*readbuf
,
1548 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1550 if (ops
->beneath
!= NULL
)
1551 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1552 readbuf
, writebuf
, offset
, len
);
1557 /* Target vector read/write partial wrapper functions.
1559 NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial
1560 (inbuf, outbuf)", instead of separate read/write methods, make life
1564 target_read_partial (struct target_ops
*ops
,
1565 enum target_object object
,
1566 const char *annex
, gdb_byte
*buf
,
1567 ULONGEST offset
, LONGEST len
)
1569 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
);
1573 target_write_partial (struct target_ops
*ops
,
1574 enum target_object object
,
1575 const char *annex
, const gdb_byte
*buf
,
1576 ULONGEST offset
, LONGEST len
)
1578 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
);
1581 /* Wrappers to perform the full transfer. */
1583 target_read (struct target_ops
*ops
,
1584 enum target_object object
,
1585 const char *annex
, gdb_byte
*buf
,
1586 ULONGEST offset
, LONGEST len
)
1589 while (xfered
< len
)
1591 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1592 (gdb_byte
*) buf
+ xfered
,
1593 offset
+ xfered
, len
- xfered
);
1594 /* Call an observer, notifying them of the xfer progress? */
1606 target_read_until_error (struct target_ops
*ops
,
1607 enum target_object object
,
1608 const char *annex
, gdb_byte
*buf
,
1609 ULONGEST offset
, LONGEST len
)
1612 while (xfered
< len
)
1614 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1615 (gdb_byte
*) buf
+ xfered
,
1616 offset
+ xfered
, len
- xfered
);
1617 /* Call an observer, notifying them of the xfer progress? */
1622 /* We've got an error. Try to read in smaller blocks. */
1623 ULONGEST start
= offset
+ xfered
;
1624 ULONGEST remaining
= len
- xfered
;
1627 /* If an attempt was made to read a random memory address,
1628 it's likely that the very first byte is not accessible.
1629 Try reading the first byte, to avoid doing log N tries
1631 xfer
= target_read_partial (ops
, object
, annex
,
1632 (gdb_byte
*) buf
+ xfered
, start
, 1);
1641 xfer
= target_read_partial (ops
, object
, annex
,
1642 (gdb_byte
*) buf
+ xfered
,
1652 /* We have successfully read the first half. So, the
1653 error must be in the second half. Adjust start and
1654 remaining to point at the second half. */
1671 /* An alternative to target_write with progress callbacks. */
1674 target_write_with_progress (struct target_ops
*ops
,
1675 enum target_object object
,
1676 const char *annex
, const gdb_byte
*buf
,
1677 ULONGEST offset
, LONGEST len
,
1678 void (*progress
) (ULONGEST
, void *), void *baton
)
1682 /* Give the progress callback a chance to set up. */
1684 (*progress
) (0, baton
);
1686 while (xfered
< len
)
1688 LONGEST xfer
= target_write_partial (ops
, object
, annex
,
1689 (gdb_byte
*) buf
+ xfered
,
1690 offset
+ xfered
, len
- xfered
);
1698 (*progress
) (xfer
, baton
);
1707 target_write (struct target_ops
*ops
,
1708 enum target_object object
,
1709 const char *annex
, const gdb_byte
*buf
,
1710 ULONGEST offset
, LONGEST len
)
1712 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1716 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1717 the size of the transferred data. PADDING additional bytes are
1718 available in *BUF_P. This is a helper function for
1719 target_read_alloc; see the declaration of that function for more
1723 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1724 const char *annex
, gdb_byte
**buf_p
, int padding
)
1726 size_t buf_alloc
, buf_pos
;
1730 /* This function does not have a length parameter; it reads the
1731 entire OBJECT). Also, it doesn't support objects fetched partly
1732 from one target and partly from another (in a different stratum,
1733 e.g. a core file and an executable). Both reasons make it
1734 unsuitable for reading memory. */
1735 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1737 /* Start by reading up to 4K at a time. The target will throttle
1738 this number down if necessary. */
1740 buf
= xmalloc (buf_alloc
);
1744 n
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
1745 buf_pos
, buf_alloc
- buf_pos
- padding
);
1748 /* An error occurred. */
1754 /* Read all there was. */
1764 /* If the buffer is filling up, expand it. */
1765 if (buf_alloc
< buf_pos
* 2)
1768 buf
= xrealloc (buf
, buf_alloc
);
1775 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1776 the size of the transferred data. See the declaration in "target.h"
1777 function for more information about the return value. */
1780 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1781 const char *annex
, gdb_byte
**buf_p
)
1783 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
1786 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1787 returned as a string, allocated using xmalloc. If an error occurs
1788 or the transfer is unsupported, NULL is returned. Empty objects
1789 are returned as allocated but empty strings. A warning is issued
1790 if the result contains any embedded NUL bytes. */
1793 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1797 LONGEST transferred
;
1799 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
1801 if (transferred
< 0)
1804 if (transferred
== 0)
1805 return xstrdup ("");
1807 buffer
[transferred
] = 0;
1808 if (strlen (buffer
) < transferred
)
1809 warning (_("target object %d, annex %s, "
1810 "contained unexpected null characters"),
1811 (int) object
, annex
? annex
: "(none)");
1813 return (char *) buffer
;
1816 /* Memory transfer methods. */
1819 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1822 /* This method is used to read from an alternate, non-current
1823 target. This read must bypass the overlay support (as symbols
1824 don't match this target), and GDB's internal cache (wrong cache
1825 for this target). */
1826 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1828 memory_error (EIO
, addr
);
1832 get_target_memory_unsigned (struct target_ops
*ops
,
1833 CORE_ADDR addr
, int len
, enum bfd_endian byte_order
)
1835 gdb_byte buf
[sizeof (ULONGEST
)];
1837 gdb_assert (len
<= sizeof (buf
));
1838 get_target_memory (ops
, addr
, buf
, len
);
1839 return extract_unsigned_integer (buf
, len
, byte_order
);
1843 target_info (char *args
, int from_tty
)
1845 struct target_ops
*t
;
1846 int has_all_mem
= 0;
1848 if (symfile_objfile
!= NULL
)
1849 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile
->name
);
1851 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
1853 if (!(*t
->to_has_memory
) (t
))
1856 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1859 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n"));
1860 printf_unfiltered ("%s:\n", t
->to_longname
);
1861 (t
->to_files_info
) (t
);
1862 has_all_mem
= (*t
->to_has_all_memory
) (t
);
1866 /* This function is called before any new inferior is created, e.g.
1867 by running a program, attaching, or connecting to a target.
1868 It cleans up any state from previous invocations which might
1869 change between runs. This is a subset of what target_preopen
1870 resets (things which might change between targets). */
1873 target_pre_inferior (int from_tty
)
1875 /* Clear out solib state. Otherwise the solib state of the previous
1876 inferior might have survived and is entirely wrong for the new
1877 target. This has been observed on GNU/Linux using glibc 2.3. How
1889 Cannot access memory at address 0xdeadbeef
1892 /* In some OSs, the shared library list is the same/global/shared
1893 across inferiors. If code is shared between processes, so are
1894 memory regions and features. */
1895 if (!gdbarch_has_global_solist (target_gdbarch
))
1897 no_shared_libraries (NULL
, from_tty
);
1899 invalidate_target_mem_regions ();
1901 target_clear_description ();
1905 /* Callback for iterate_over_inferiors. Gets rid of the given
1909 dispose_inferior (struct inferior
*inf
, void *args
)
1911 struct thread_info
*thread
;
1913 thread
= any_thread_of_process (inf
->pid
);
1916 switch_to_thread (thread
->ptid
);
1918 /* Core inferiors actually should be detached, not killed. */
1919 if (target_has_execution
)
1922 target_detach (NULL
, 0);
1928 /* This is to be called by the open routine before it does
1932 target_preopen (int from_tty
)
1936 if (have_inferiors ())
1939 || !have_live_inferiors ()
1940 || query (_("A program is being debugged already. Kill it? ")))
1941 iterate_over_inferiors (dispose_inferior
, NULL
);
1943 error (_("Program not killed."));
1946 /* Calling target_kill may remove the target from the stack. But if
1947 it doesn't (which seems like a win for UDI), remove it now. */
1948 /* Leave the exec target, though. The user may be switching from a
1949 live process to a core of the same program. */
1950 pop_all_targets_above (file_stratum
, 0);
1952 target_pre_inferior (from_tty
);
1955 /* Detach a target after doing deferred register stores. */
1958 target_detach (char *args
, int from_tty
)
1960 struct target_ops
* t
;
1962 if (gdbarch_has_global_breakpoints (target_gdbarch
))
1963 /* Don't remove global breakpoints here. They're removed on
1964 disconnection from the target. */
1967 /* If we're in breakpoints-always-inserted mode, have to remove
1968 them before detaching. */
1969 remove_breakpoints ();
1971 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1973 if (t
->to_detach
!= NULL
)
1975 t
->to_detach (t
, args
, from_tty
);
1977 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
1983 internal_error (__FILE__
, __LINE__
, "could not find a target to detach");
1987 target_disconnect (char *args
, int from_tty
)
1989 struct target_ops
*t
;
1991 /* If we're in breakpoints-always-inserted mode or if breakpoints
1992 are global across processes, we have to remove them before
1994 remove_breakpoints ();
1996 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1997 if (t
->to_disconnect
!= NULL
)
2000 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2002 t
->to_disconnect (t
, args
, from_tty
);
2010 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2012 struct target_ops
*t
;
2014 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2016 if (t
->to_wait
!= NULL
)
2018 ptid_t retval
= (*t
->to_wait
) (t
, ptid
, status
, options
);
2022 char *status_string
;
2024 status_string
= target_waitstatus_to_string (status
);
2025 fprintf_unfiltered (gdb_stdlog
,
2026 "target_wait (%d, status) = %d, %s\n",
2027 PIDGET (ptid
), PIDGET (retval
),
2029 xfree (status_string
);
2040 target_pid_to_str (ptid_t ptid
)
2042 struct target_ops
*t
;
2044 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2046 if (t
->to_pid_to_str
!= NULL
)
2047 return (*t
->to_pid_to_str
) (t
, ptid
);
2050 return normal_pid_to_str (ptid
);
2054 target_resume (ptid_t ptid
, int step
, enum target_signal signal
)
2056 struct target_ops
*t
;
2058 dcache_invalidate (target_dcache
);
2060 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2062 if (t
->to_resume
!= NULL
)
2064 t
->to_resume (t
, ptid
, step
, signal
);
2066 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2068 step
? "step" : "continue",
2069 target_signal_to_name (signal
));
2071 set_executing (ptid
, 1);
2072 set_running (ptid
, 1);
2073 clear_inline_frame_state (ptid
);
2080 /* Look through the list of possible targets for a target that can
2084 target_follow_fork (int follow_child
)
2086 struct target_ops
*t
;
2088 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2090 if (t
->to_follow_fork
!= NULL
)
2092 int retval
= t
->to_follow_fork (t
, follow_child
);
2094 fprintf_unfiltered (gdb_stdlog
, "target_follow_fork (%d) = %d\n",
2095 follow_child
, retval
);
2100 /* Some target returned a fork event, but did not know how to follow it. */
2101 internal_error (__FILE__
, __LINE__
,
2102 "could not find a target to follow fork");
2106 target_mourn_inferior (void)
2108 struct target_ops
*t
;
2109 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2111 if (t
->to_mourn_inferior
!= NULL
)
2113 t
->to_mourn_inferior (t
);
2115 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2117 /* We no longer need to keep handles on any of the object files.
2118 Make sure to release them to avoid unnecessarily locking any
2119 of them while we're not actually debugging. */
2120 bfd_cache_close_all ();
2126 internal_error (__FILE__
, __LINE__
,
2127 "could not find a target to follow mourn inferiour");
2130 /* Look for a target which can describe architectural features, starting
2131 from TARGET. If we find one, return its description. */
2133 const struct target_desc
*
2134 target_read_description (struct target_ops
*target
)
2136 struct target_ops
*t
;
2138 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2139 if (t
->to_read_description
!= NULL
)
2141 const struct target_desc
*tdesc
;
2143 tdesc
= t
->to_read_description (t
);
2151 /* The default implementation of to_search_memory.
2152 This implements a basic search of memory, reading target memory and
2153 performing the search here (as opposed to performing the search in on the
2154 target side with, for example, gdbserver). */
2157 simple_search_memory (struct target_ops
*ops
,
2158 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2159 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2160 CORE_ADDR
*found_addrp
)
2162 /* NOTE: also defined in find.c testcase. */
2163 #define SEARCH_CHUNK_SIZE 16000
2164 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2165 /* Buffer to hold memory contents for searching. */
2166 gdb_byte
*search_buf
;
2167 unsigned search_buf_size
;
2168 struct cleanup
*old_cleanups
;
2170 search_buf_size
= chunk_size
+ pattern_len
- 1;
2172 /* No point in trying to allocate a buffer larger than the search space. */
2173 if (search_space_len
< search_buf_size
)
2174 search_buf_size
= search_space_len
;
2176 search_buf
= malloc (search_buf_size
);
2177 if (search_buf
== NULL
)
2178 error (_("Unable to allocate memory to perform the search."));
2179 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2181 /* Prime the search buffer. */
2183 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2184 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2186 warning (_("Unable to access target memory at %s, halting search."),
2187 hex_string (start_addr
));
2188 do_cleanups (old_cleanups
);
2192 /* Perform the search.
2194 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2195 When we've scanned N bytes we copy the trailing bytes to the start and
2196 read in another N bytes. */
2198 while (search_space_len
>= pattern_len
)
2200 gdb_byte
*found_ptr
;
2201 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2203 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2204 pattern
, pattern_len
);
2206 if (found_ptr
!= NULL
)
2208 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2209 *found_addrp
= found_addr
;
2210 do_cleanups (old_cleanups
);
2214 /* Not found in this chunk, skip to next chunk. */
2216 /* Don't let search_space_len wrap here, it's unsigned. */
2217 if (search_space_len
>= chunk_size
)
2218 search_space_len
-= chunk_size
;
2220 search_space_len
= 0;
2222 if (search_space_len
>= pattern_len
)
2224 unsigned keep_len
= search_buf_size
- chunk_size
;
2225 CORE_ADDR read_addr
= start_addr
+ keep_len
;
2228 /* Copy the trailing part of the previous iteration to the front
2229 of the buffer for the next iteration. */
2230 gdb_assert (keep_len
== pattern_len
- 1);
2231 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2233 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2235 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2236 search_buf
+ keep_len
, read_addr
,
2237 nr_to_read
) != nr_to_read
)
2239 warning (_("Unable to access target memory at %s, halting search."),
2240 hex_string (read_addr
));
2241 do_cleanups (old_cleanups
);
2245 start_addr
+= chunk_size
;
2251 do_cleanups (old_cleanups
);
2255 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2256 sequence of bytes in PATTERN with length PATTERN_LEN.
2258 The result is 1 if found, 0 if not found, and -1 if there was an error
2259 requiring halting of the search (e.g. memory read error).
2260 If the pattern is found the address is recorded in FOUND_ADDRP. */
2263 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2264 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2265 CORE_ADDR
*found_addrp
)
2267 struct target_ops
*t
;
2270 /* We don't use INHERIT to set current_target.to_search_memory,
2271 so we have to scan the target stack and handle targetdebug
2275 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2276 hex_string (start_addr
));
2278 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2279 if (t
->to_search_memory
!= NULL
)
2284 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2285 pattern
, pattern_len
, found_addrp
);
2289 /* If a special version of to_search_memory isn't available, use the
2291 found
= simple_search_memory (current_target
.beneath
,
2292 start_addr
, search_space_len
,
2293 pattern
, pattern_len
, found_addrp
);
2297 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2302 /* Look through the currently pushed targets. If none of them will
2303 be able to restart the currently running process, issue an error
2307 target_require_runnable (void)
2309 struct target_ops
*t
;
2311 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2313 /* If this target knows how to create a new program, then
2314 assume we will still be able to after killing the current
2315 one. Either killing and mourning will not pop T, or else
2316 find_default_run_target will find it again. */
2317 if (t
->to_create_inferior
!= NULL
)
2320 /* Do not worry about thread_stratum targets that can not
2321 create inferiors. Assume they will be pushed again if
2322 necessary, and continue to the process_stratum. */
2323 if (t
->to_stratum
== thread_stratum
2324 || t
->to_stratum
== arch_stratum
)
2328 The \"%s\" target does not support \"run\". Try \"help target\" or \"continue\"."),
2332 /* This function is only called if the target is running. In that
2333 case there should have been a process_stratum target and it
2334 should either know how to create inferiors, or not... */
2335 internal_error (__FILE__
, __LINE__
, "No targets found");
2338 /* Look through the list of possible targets for a target that can
2339 execute a run or attach command without any other data. This is
2340 used to locate the default process stratum.
2342 If DO_MESG is not NULL, the result is always valid (error() is
2343 called for errors); else, return NULL on error. */
2345 static struct target_ops
*
2346 find_default_run_target (char *do_mesg
)
2348 struct target_ops
**t
;
2349 struct target_ops
*runable
= NULL
;
2354 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2357 if ((*t
)->to_can_run
&& target_can_run (*t
))
2367 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2376 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
2378 struct target_ops
*t
;
2380 t
= find_default_run_target ("attach");
2381 (t
->to_attach
) (t
, args
, from_tty
);
2386 find_default_create_inferior (struct target_ops
*ops
,
2387 char *exec_file
, char *allargs
, char **env
,
2390 struct target_ops
*t
;
2392 t
= find_default_run_target ("run");
2393 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
2398 find_default_can_async_p (void)
2400 struct target_ops
*t
;
2402 /* This may be called before the target is pushed on the stack;
2403 look for the default process stratum. If there's none, gdb isn't
2404 configured with a native debugger, and target remote isn't
2406 t
= find_default_run_target (NULL
);
2407 if (t
&& t
->to_can_async_p
)
2408 return (t
->to_can_async_p
) ();
2413 find_default_is_async_p (void)
2415 struct target_ops
*t
;
2417 /* This may be called before the target is pushed on the stack;
2418 look for the default process stratum. If there's none, gdb isn't
2419 configured with a native debugger, and target remote isn't
2421 t
= find_default_run_target (NULL
);
2422 if (t
&& t
->to_is_async_p
)
2423 return (t
->to_is_async_p
) ();
2428 find_default_supports_non_stop (void)
2430 struct target_ops
*t
;
2432 t
= find_default_run_target (NULL
);
2433 if (t
&& t
->to_supports_non_stop
)
2434 return (t
->to_supports_non_stop
) ();
2439 target_supports_non_stop (void)
2441 struct target_ops
*t
;
2442 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2443 if (t
->to_supports_non_stop
)
2444 return t
->to_supports_non_stop ();
2451 target_get_osdata (const char *type
)
2454 struct target_ops
*t
;
2456 /* If we're already connected to something that can get us OS
2457 related data, use it. Otherwise, try using the native
2459 if (current_target
.to_stratum
>= process_stratum
)
2460 t
= current_target
.beneath
;
2462 t
= find_default_run_target ("get OS data");
2467 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2471 default_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
2473 return (len
<= gdbarch_ptr_bit (target_gdbarch
) / TARGET_CHAR_BIT
);
2477 default_watchpoint_addr_within_range (struct target_ops
*target
,
2479 CORE_ADDR start
, int length
)
2481 return addr
>= start
&& addr
< start
+ length
;
2484 static struct gdbarch
*
2485 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
2487 return target_gdbarch
;
2503 return_minus_one (void)
2508 /* Find a single runnable target in the stack and return it. If for
2509 some reason there is more than one, return NULL. */
2512 find_run_target (void)
2514 struct target_ops
**t
;
2515 struct target_ops
*runable
= NULL
;
2520 for (t
= target_structs
; t
< target_structs
+ target_struct_size
; ++t
)
2522 if ((*t
)->to_can_run
&& target_can_run (*t
))
2529 return (count
== 1 ? runable
: NULL
);
2532 /* Find a single core_stratum target in the list of targets and return it.
2533 If for some reason there is more than one, return NULL. */
2536 find_core_target (void)
2538 struct target_ops
**t
;
2539 struct target_ops
*runable
= NULL
;
2544 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2547 if ((*t
)->to_stratum
== core_stratum
)
2554 return (count
== 1 ? runable
: NULL
);
2558 * Find the next target down the stack from the specified target.
2562 find_target_beneath (struct target_ops
*t
)
2568 /* The inferior process has died. Long live the inferior! */
2571 generic_mourn_inferior (void)
2575 ptid
= inferior_ptid
;
2576 inferior_ptid
= null_ptid
;
2578 if (!ptid_equal (ptid
, null_ptid
))
2580 int pid
= ptid_get_pid (ptid
);
2581 delete_inferior (pid
);
2584 breakpoint_init_inferior (inf_exited
);
2585 registers_changed ();
2587 reopen_exec_file ();
2588 reinit_frame_cache ();
2590 if (deprecated_detach_hook
)
2591 deprecated_detach_hook ();
2594 /* Helper function for child_wait and the derivatives of child_wait.
2595 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
2596 translation of that in OURSTATUS. */
2598 store_waitstatus (struct target_waitstatus
*ourstatus
, int hoststatus
)
2600 if (WIFEXITED (hoststatus
))
2602 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
2603 ourstatus
->value
.integer
= WEXITSTATUS (hoststatus
);
2605 else if (!WIFSTOPPED (hoststatus
))
2607 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
2608 ourstatus
->value
.sig
= target_signal_from_host (WTERMSIG (hoststatus
));
2612 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
2613 ourstatus
->value
.sig
= target_signal_from_host (WSTOPSIG (hoststatus
));
2617 /* Convert a normal process ID to a string. Returns the string in a
2621 normal_pid_to_str (ptid_t ptid
)
2623 static char buf
[32];
2625 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
2630 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2632 return normal_pid_to_str (ptid
);
2635 /* Error-catcher for target_find_memory_regions */
2636 static int dummy_find_memory_regions (int (*ignore1
) (), void *ignore2
)
2638 error (_("No target."));
2642 /* Error-catcher for target_make_corefile_notes */
2643 static char * dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
2645 error (_("No target."));
2649 /* Set up the handful of non-empty slots needed by the dummy target
2653 init_dummy_target (void)
2655 dummy_target
.to_shortname
= "None";
2656 dummy_target
.to_longname
= "None";
2657 dummy_target
.to_doc
= "";
2658 dummy_target
.to_attach
= find_default_attach
;
2659 dummy_target
.to_detach
=
2660 (void (*)(struct target_ops
*, char *, int))target_ignore
;
2661 dummy_target
.to_create_inferior
= find_default_create_inferior
;
2662 dummy_target
.to_can_async_p
= find_default_can_async_p
;
2663 dummy_target
.to_is_async_p
= find_default_is_async_p
;
2664 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
2665 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
2666 dummy_target
.to_stratum
= dummy_stratum
;
2667 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
2668 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
2669 dummy_target
.to_xfer_partial
= default_xfer_partial
;
2670 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
2671 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
2672 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
2673 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
2674 dummy_target
.to_has_execution
= (int (*) (struct target_ops
*)) return_zero
;
2675 dummy_target
.to_magic
= OPS_MAGIC
;
2679 debug_to_open (char *args
, int from_tty
)
2681 debug_target
.to_open (args
, from_tty
);
2683 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
2687 target_close (struct target_ops
*targ
, int quitting
)
2689 if (targ
->to_xclose
!= NULL
)
2690 targ
->to_xclose (targ
, quitting
);
2691 else if (targ
->to_close
!= NULL
)
2692 targ
->to_close (quitting
);
2695 fprintf_unfiltered (gdb_stdlog
, "target_close (%d)\n", quitting
);
2699 target_attach (char *args
, int from_tty
)
2701 struct target_ops
*t
;
2702 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2704 if (t
->to_attach
!= NULL
)
2706 t
->to_attach (t
, args
, from_tty
);
2708 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
2714 internal_error (__FILE__
, __LINE__
,
2715 "could not find a target to attach");
2719 target_thread_alive (ptid_t ptid
)
2721 struct target_ops
*t
;
2722 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2724 if (t
->to_thread_alive
!= NULL
)
2728 retval
= t
->to_thread_alive (t
, ptid
);
2730 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
2731 PIDGET (ptid
), retval
);
2741 target_find_new_threads (void)
2743 struct target_ops
*t
;
2744 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2746 if (t
->to_find_new_threads
!= NULL
)
2748 t
->to_find_new_threads (t
);
2750 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
2758 debug_to_post_attach (int pid
)
2760 debug_target
.to_post_attach (pid
);
2762 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
2765 /* Return a pretty printed form of target_waitstatus.
2766 Space for the result is malloc'd, caller must free. */
2769 target_waitstatus_to_string (const struct target_waitstatus
*ws
)
2771 const char *kind_str
= "status->kind = ";
2775 case TARGET_WAITKIND_EXITED
:
2776 return xstrprintf ("%sexited, status = %d",
2777 kind_str
, ws
->value
.integer
);
2778 case TARGET_WAITKIND_STOPPED
:
2779 return xstrprintf ("%sstopped, signal = %s",
2780 kind_str
, target_signal_to_name (ws
->value
.sig
));
2781 case TARGET_WAITKIND_SIGNALLED
:
2782 return xstrprintf ("%ssignalled, signal = %s",
2783 kind_str
, target_signal_to_name (ws
->value
.sig
));
2784 case TARGET_WAITKIND_LOADED
:
2785 return xstrprintf ("%sloaded", kind_str
);
2786 case TARGET_WAITKIND_FORKED
:
2787 return xstrprintf ("%sforked", kind_str
);
2788 case TARGET_WAITKIND_VFORKED
:
2789 return xstrprintf ("%svforked", kind_str
);
2790 case TARGET_WAITKIND_EXECD
:
2791 return xstrprintf ("%sexecd", kind_str
);
2792 case TARGET_WAITKIND_SYSCALL_ENTRY
:
2793 return xstrprintf ("%ssyscall-entry", kind_str
);
2794 case TARGET_WAITKIND_SYSCALL_RETURN
:
2795 return xstrprintf ("%ssyscall-return", kind_str
);
2796 case TARGET_WAITKIND_SPURIOUS
:
2797 return xstrprintf ("%sspurious", kind_str
);
2798 case TARGET_WAITKIND_IGNORE
:
2799 return xstrprintf ("%signore", kind_str
);
2800 case TARGET_WAITKIND_NO_HISTORY
:
2801 return xstrprintf ("%sno-history", kind_str
);
2803 return xstrprintf ("%sunknown???", kind_str
);
2808 debug_print_register (const char * func
,
2809 struct regcache
*regcache
, int regno
)
2811 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
2812 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
2813 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
2814 && gdbarch_register_name (gdbarch
, regno
) != NULL
2815 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
2816 fprintf_unfiltered (gdb_stdlog
, "(%s)",
2817 gdbarch_register_name (gdbarch
, regno
));
2819 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
2820 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
2822 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2823 int i
, size
= register_size (gdbarch
, regno
);
2824 unsigned char buf
[MAX_REGISTER_SIZE
];
2825 regcache_raw_collect (regcache
, regno
, buf
);
2826 fprintf_unfiltered (gdb_stdlog
, " = ");
2827 for (i
= 0; i
< size
; i
++)
2829 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
2831 if (size
<= sizeof (LONGEST
))
2833 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
2834 fprintf_unfiltered (gdb_stdlog
, " %s %s",
2835 core_addr_to_string_nz (val
), plongest (val
));
2838 fprintf_unfiltered (gdb_stdlog
, "\n");
2842 target_fetch_registers (struct regcache
*regcache
, int regno
)
2844 struct target_ops
*t
;
2845 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2847 if (t
->to_fetch_registers
!= NULL
)
2849 t
->to_fetch_registers (t
, regcache
, regno
);
2851 debug_print_register ("target_fetch_registers", regcache
, regno
);
2858 target_store_registers (struct regcache
*regcache
, int regno
)
2861 struct target_ops
*t
;
2862 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2864 if (t
->to_store_registers
!= NULL
)
2866 t
->to_store_registers (t
, regcache
, regno
);
2869 debug_print_register ("target_store_registers", regcache
, regno
);
2879 debug_to_prepare_to_store (struct regcache
*regcache
)
2881 debug_target
.to_prepare_to_store (regcache
);
2883 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
2887 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
2888 int write
, struct mem_attrib
*attrib
,
2889 struct target_ops
*target
)
2893 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
2896 fprintf_unfiltered (gdb_stdlog
,
2897 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
2898 paddress (target_gdbarch
, memaddr
), len
,
2899 write
? "write" : "read", retval
);
2905 fputs_unfiltered (", bytes =", gdb_stdlog
);
2906 for (i
= 0; i
< retval
; i
++)
2908 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
2910 if (targetdebug
< 2 && i
> 0)
2912 fprintf_unfiltered (gdb_stdlog
, " ...");
2915 fprintf_unfiltered (gdb_stdlog
, "\n");
2918 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
2922 fputc_unfiltered ('\n', gdb_stdlog
);
2928 debug_to_files_info (struct target_ops
*target
)
2930 debug_target
.to_files_info (target
);
2932 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
2936 debug_to_insert_breakpoint (struct gdbarch
*gdbarch
,
2937 struct bp_target_info
*bp_tgt
)
2941 retval
= debug_target
.to_insert_breakpoint (gdbarch
, bp_tgt
);
2943 fprintf_unfiltered (gdb_stdlog
,
2944 "target_insert_breakpoint (0x%lx, xxx) = %ld\n",
2945 (unsigned long) bp_tgt
->placed_address
,
2946 (unsigned long) retval
);
2951 debug_to_remove_breakpoint (struct gdbarch
*gdbarch
,
2952 struct bp_target_info
*bp_tgt
)
2956 retval
= debug_target
.to_remove_breakpoint (gdbarch
, bp_tgt
);
2958 fprintf_unfiltered (gdb_stdlog
,
2959 "target_remove_breakpoint (0x%lx, xxx) = %ld\n",
2960 (unsigned long) bp_tgt
->placed_address
,
2961 (unsigned long) retval
);
2966 debug_to_can_use_hw_breakpoint (int type
, int cnt
, int from_tty
)
2970 retval
= debug_target
.to_can_use_hw_breakpoint (type
, cnt
, from_tty
);
2972 fprintf_unfiltered (gdb_stdlog
,
2973 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
2974 (unsigned long) type
,
2975 (unsigned long) cnt
,
2976 (unsigned long) from_tty
,
2977 (unsigned long) retval
);
2982 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
2986 retval
= debug_target
.to_region_ok_for_hw_watchpoint (addr
, len
);
2988 fprintf_unfiltered (gdb_stdlog
,
2989 "target_region_ok_for_hw_watchpoint (%ld, %ld) = 0x%lx\n",
2990 (unsigned long) addr
,
2991 (unsigned long) len
,
2992 (unsigned long) retval
);
2997 debug_to_stopped_by_watchpoint (void)
3001 retval
= debug_target
.to_stopped_by_watchpoint ();
3003 fprintf_unfiltered (gdb_stdlog
,
3004 "target_stopped_by_watchpoint () = %ld\n",
3005 (unsigned long) retval
);
3010 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3014 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3016 fprintf_unfiltered (gdb_stdlog
,
3017 "target_stopped_data_address ([0x%lx]) = %ld\n",
3018 (unsigned long)*addr
,
3019 (unsigned long)retval
);
3024 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3026 CORE_ADDR start
, int length
)
3030 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3033 fprintf_filtered (gdb_stdlog
,
3034 "target_watchpoint_addr_within_range (0x%lx, 0x%lx, %d) = %d\n",
3035 (unsigned long) addr
, (unsigned long) start
, length
,
3041 debug_to_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
3042 struct bp_target_info
*bp_tgt
)
3046 retval
= debug_target
.to_insert_hw_breakpoint (gdbarch
, bp_tgt
);
3048 fprintf_unfiltered (gdb_stdlog
,
3049 "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n",
3050 (unsigned long) bp_tgt
->placed_address
,
3051 (unsigned long) retval
);
3056 debug_to_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
3057 struct bp_target_info
*bp_tgt
)
3061 retval
= debug_target
.to_remove_hw_breakpoint (gdbarch
, bp_tgt
);
3063 fprintf_unfiltered (gdb_stdlog
,
3064 "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n",
3065 (unsigned long) bp_tgt
->placed_address
,
3066 (unsigned long) retval
);
3071 debug_to_insert_watchpoint (CORE_ADDR addr
, int len
, int type
)
3075 retval
= debug_target
.to_insert_watchpoint (addr
, len
, type
);
3077 fprintf_unfiltered (gdb_stdlog
,
3078 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
3079 (unsigned long) addr
, len
, type
, (unsigned long) retval
);
3084 debug_to_remove_watchpoint (CORE_ADDR addr
, int len
, int type
)
3088 retval
= debug_target
.to_remove_watchpoint (addr
, len
, type
);
3090 fprintf_unfiltered (gdb_stdlog
,
3091 "target_remove_watchpoint (0x%lx, %d, %d) = %ld\n",
3092 (unsigned long) addr
, len
, type
, (unsigned long) retval
);
3097 debug_to_terminal_init (void)
3099 debug_target
.to_terminal_init ();
3101 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3105 debug_to_terminal_inferior (void)
3107 debug_target
.to_terminal_inferior ();
3109 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3113 debug_to_terminal_ours_for_output (void)
3115 debug_target
.to_terminal_ours_for_output ();
3117 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3121 debug_to_terminal_ours (void)
3123 debug_target
.to_terminal_ours ();
3125 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3129 debug_to_terminal_save_ours (void)
3131 debug_target
.to_terminal_save_ours ();
3133 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3137 debug_to_terminal_info (char *arg
, int from_tty
)
3139 debug_target
.to_terminal_info (arg
, from_tty
);
3141 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3146 debug_to_load (char *args
, int from_tty
)
3148 debug_target
.to_load (args
, from_tty
);
3150 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3154 debug_to_lookup_symbol (char *name
, CORE_ADDR
*addrp
)
3158 retval
= debug_target
.to_lookup_symbol (name
, addrp
);
3160 fprintf_unfiltered (gdb_stdlog
, "target_lookup_symbol (%s, xxx)\n", name
);
3166 debug_to_post_startup_inferior (ptid_t ptid
)
3168 debug_target
.to_post_startup_inferior (ptid
);
3170 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3175 debug_to_acknowledge_created_inferior (int pid
)
3177 debug_target
.to_acknowledge_created_inferior (pid
);
3179 fprintf_unfiltered (gdb_stdlog
, "target_acknowledge_created_inferior (%d)\n",
3184 debug_to_insert_fork_catchpoint (int pid
)
3186 debug_target
.to_insert_fork_catchpoint (pid
);
3188 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d)\n",
3193 debug_to_remove_fork_catchpoint (int pid
)
3197 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
3199 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3206 debug_to_insert_vfork_catchpoint (int pid
)
3208 debug_target
.to_insert_vfork_catchpoint (pid
);
3210 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d)\n",
3215 debug_to_remove_vfork_catchpoint (int pid
)
3219 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
3221 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3228 debug_to_insert_exec_catchpoint (int pid
)
3230 debug_target
.to_insert_exec_catchpoint (pid
);
3232 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d)\n",
3237 debug_to_remove_exec_catchpoint (int pid
)
3241 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
3243 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3250 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
3254 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
3256 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3257 pid
, wait_status
, *exit_status
, has_exited
);
3263 debug_to_can_run (void)
3267 retval
= debug_target
.to_can_run ();
3269 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3275 debug_to_notice_signals (ptid_t ptid
)
3277 debug_target
.to_notice_signals (ptid
);
3279 fprintf_unfiltered (gdb_stdlog
, "target_notice_signals (%d)\n",
3283 static struct gdbarch
*
3284 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3286 struct gdbarch
*retval
;
3288 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3290 fprintf_unfiltered (gdb_stdlog
, "target_thread_architecture (%s) = %p [%s]\n",
3291 target_pid_to_str (ptid
), retval
,
3292 gdbarch_bfd_arch_info (retval
)->printable_name
);
3297 debug_to_stop (ptid_t ptid
)
3299 debug_target
.to_stop (ptid
);
3301 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
3302 target_pid_to_str (ptid
));
3306 debug_to_rcmd (char *command
,
3307 struct ui_file
*outbuf
)
3309 debug_target
.to_rcmd (command
, outbuf
);
3310 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
3314 debug_to_pid_to_exec_file (int pid
)
3318 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
3320 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
3327 setup_target_debug (void)
3329 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3331 current_target
.to_open
= debug_to_open
;
3332 current_target
.to_post_attach
= debug_to_post_attach
;
3333 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
3334 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
3335 current_target
.to_files_info
= debug_to_files_info
;
3336 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
3337 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
3338 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
3339 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
3340 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
3341 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
3342 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
3343 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
3344 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
3345 current_target
.to_watchpoint_addr_within_range
= debug_to_watchpoint_addr_within_range
;
3346 current_target
.to_region_ok_for_hw_watchpoint
= debug_to_region_ok_for_hw_watchpoint
;
3347 current_target
.to_terminal_init
= debug_to_terminal_init
;
3348 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
3349 current_target
.to_terminal_ours_for_output
= debug_to_terminal_ours_for_output
;
3350 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
3351 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
3352 current_target
.to_terminal_info
= debug_to_terminal_info
;
3353 current_target
.to_load
= debug_to_load
;
3354 current_target
.to_lookup_symbol
= debug_to_lookup_symbol
;
3355 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
3356 current_target
.to_acknowledge_created_inferior
= debug_to_acknowledge_created_inferior
;
3357 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
3358 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
3359 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
3360 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
3361 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
3362 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
3363 current_target
.to_has_exited
= debug_to_has_exited
;
3364 current_target
.to_can_run
= debug_to_can_run
;
3365 current_target
.to_notice_signals
= debug_to_notice_signals
;
3366 current_target
.to_stop
= debug_to_stop
;
3367 current_target
.to_rcmd
= debug_to_rcmd
;
3368 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
3369 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
3373 static char targ_desc
[] =
3374 "Names of targets and files being debugged.\n\
3375 Shows the entire stack of targets currently in use (including the exec-file,\n\
3376 core-file, and process, if any), as well as the symbol file name.";
3379 do_monitor_command (char *cmd
,
3382 if ((current_target
.to_rcmd
3383 == (void (*) (char *, struct ui_file
*)) tcomplain
)
3384 || (current_target
.to_rcmd
== debug_to_rcmd
3385 && (debug_target
.to_rcmd
3386 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
3387 error (_("\"monitor\" command not supported by this target."));
3388 target_rcmd (cmd
, gdb_stdtarg
);
3391 /* Print the name of each layers of our target stack. */
3394 maintenance_print_target_stack (char *cmd
, int from_tty
)
3396 struct target_ops
*t
;
3398 printf_filtered (_("The current target stack is:\n"));
3400 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
3402 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
3406 /* Controls if async mode is permitted. */
3407 int target_async_permitted
= 0;
3409 /* The set command writes to this variable. If the inferior is
3410 executing, linux_nat_async_permitted is *not* updated. */
3411 static int target_async_permitted_1
= 0;
3414 set_maintenance_target_async_permitted (char *args
, int from_tty
,
3415 struct cmd_list_element
*c
)
3417 if (have_live_inferiors ())
3419 target_async_permitted_1
= target_async_permitted
;
3420 error (_("Cannot change this setting while the inferior is running."));
3423 target_async_permitted
= target_async_permitted_1
;
3427 show_maintenance_target_async_permitted (struct ui_file
*file
, int from_tty
,
3428 struct cmd_list_element
*c
,
3431 fprintf_filtered (file
, _("\
3432 Controlling the inferior in asynchronous mode is %s.\n"), value
);
3436 initialize_targets (void)
3438 init_dummy_target ();
3439 push_target (&dummy_target
);
3441 add_info ("target", target_info
, targ_desc
);
3442 add_info ("files", target_info
, targ_desc
);
3444 add_setshow_zinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3445 Set target debugging."), _("\
3446 Show target debugging."), _("\
3447 When non-zero, target debugging is enabled. Higher numbers are more\n\
3448 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
3452 &setdebuglist
, &showdebuglist
);
3454 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3455 &trust_readonly
, _("\
3456 Set mode for reading from readonly sections."), _("\
3457 Show mode for reading from readonly sections."), _("\
3458 When this mode is on, memory reads from readonly sections (such as .text)\n\
3459 will be read from the object file instead of from the target. This will\n\
3460 result in significant performance improvement for remote targets."),
3462 show_trust_readonly
,
3463 &setlist
, &showlist
);
3465 add_com ("monitor", class_obscure
, do_monitor_command
,
3466 _("Send a command to the remote monitor (remote targets only)."));
3468 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3469 _("Print the name of each layer of the internal target stack."),
3470 &maintenanceprintlist
);
3472 add_setshow_boolean_cmd ("target-async", no_class
,
3473 &target_async_permitted_1
, _("\
3474 Set whether gdb controls the inferior in asynchronous mode."), _("\
3475 Show whether gdb controls the inferior in asynchronous mode."), _("\
3476 Tells gdb whether to control the inferior in asynchronous mode."),
3477 set_maintenance_target_async_permitted
,
3478 show_maintenance_target_async_permitted
,
3482 target_dcache
= dcache_init ();