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 void tcomplain (void) ATTRIBUTE_NORETURN
;
59 static int nomemory (CORE_ADDR
, char *, int, int, struct target_ops
*);
61 static int return_zero (void);
63 static int return_one (void);
65 static int return_minus_one (void);
67 void target_ignore (void);
69 static void target_command (char *, int);
71 static struct target_ops
*find_default_run_target (char *);
73 static LONGEST
default_xfer_partial (struct target_ops
*ops
,
74 enum target_object object
,
75 const char *annex
, gdb_byte
*readbuf
,
76 const gdb_byte
*writebuf
,
77 ULONGEST offset
, LONGEST len
);
79 static LONGEST
current_xfer_partial (struct target_ops
*ops
,
80 enum target_object object
,
81 const char *annex
, gdb_byte
*readbuf
,
82 const gdb_byte
*writebuf
,
83 ULONGEST offset
, LONGEST len
);
85 static LONGEST
target_xfer_partial (struct target_ops
*ops
,
86 enum target_object object
,
88 void *readbuf
, const void *writebuf
,
89 ULONGEST offset
, LONGEST len
);
91 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
94 static void init_dummy_target (void);
96 static struct target_ops debug_target
;
98 static void debug_to_open (char *, int);
100 static void debug_to_prepare_to_store (struct regcache
*);
102 static void debug_to_files_info (struct target_ops
*);
104 static int debug_to_insert_breakpoint (struct gdbarch
*,
105 struct bp_target_info
*);
107 static int debug_to_remove_breakpoint (struct gdbarch
*,
108 struct bp_target_info
*);
110 static int debug_to_can_use_hw_breakpoint (int, int, int);
112 static int debug_to_insert_hw_breakpoint (struct gdbarch
*,
113 struct bp_target_info
*);
115 static int debug_to_remove_hw_breakpoint (struct gdbarch
*,
116 struct bp_target_info
*);
118 static int debug_to_insert_watchpoint (CORE_ADDR
, int, int,
119 struct expression
*);
121 static int debug_to_remove_watchpoint (CORE_ADDR
, int, int,
122 struct expression
*);
124 static int debug_to_stopped_by_watchpoint (void);
126 static int debug_to_stopped_data_address (struct target_ops
*, CORE_ADDR
*);
128 static int debug_to_watchpoint_addr_within_range (struct target_ops
*,
129 CORE_ADDR
, CORE_ADDR
, int);
131 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR
, int);
133 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR
, int, int,
134 struct expression
*);
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_can_run (void);
152 static void debug_to_notice_signals (ptid_t
);
154 static void debug_to_stop (ptid_t
);
156 /* Pointer to array of target architecture structures; the size of the
157 array; the current index into the array; the allocated size of the
159 struct target_ops
**target_structs
;
160 unsigned target_struct_size
;
161 unsigned target_struct_index
;
162 unsigned target_struct_allocsize
;
163 #define DEFAULT_ALLOCSIZE 10
165 /* The initial current target, so that there is always a semi-valid
168 static struct target_ops dummy_target
;
170 /* Top of target stack. */
172 static struct target_ops
*target_stack
;
174 /* The target structure we are currently using to talk to a process
175 or file or whatever "inferior" we have. */
177 struct target_ops current_target
;
179 /* Command list for target. */
181 static struct cmd_list_element
*targetlist
= NULL
;
183 /* Nonzero if we should trust readonly sections from the
184 executable when reading memory. */
186 static int trust_readonly
= 0;
188 /* Nonzero if we should show true memory content including
189 memory breakpoint inserted by gdb. */
191 static int show_memory_breakpoints
= 0;
193 /* These globals control whether GDB attempts to perform these
194 operations; they are useful for targets that need to prevent
195 inadvertant disruption, such as in non-stop mode. */
197 int may_write_registers
= 1;
199 int may_write_memory
= 1;
201 int may_insert_breakpoints
= 1;
203 int may_insert_tracepoints
= 1;
205 int may_insert_fast_tracepoints
= 1;
209 /* Non-zero if we want to see trace of target level stuff. */
211 static int targetdebug
= 0;
213 show_targetdebug (struct ui_file
*file
, int from_tty
,
214 struct cmd_list_element
*c
, const char *value
)
216 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
219 static void setup_target_debug (void);
221 /* The option sets this. */
222 static int stack_cache_enabled_p_1
= 1;
223 /* And set_stack_cache_enabled_p updates this.
224 The reason for the separation is so that we don't flush the cache for
225 on->on transitions. */
226 static int stack_cache_enabled_p
= 1;
228 /* This is called *after* the stack-cache has been set.
229 Flush the cache for off->on and on->off transitions.
230 There's no real need to flush the cache for on->off transitions,
231 except cleanliness. */
234 set_stack_cache_enabled_p (char *args
, int from_tty
,
235 struct cmd_list_element
*c
)
237 if (stack_cache_enabled_p
!= stack_cache_enabled_p_1
)
238 target_dcache_invalidate ();
240 stack_cache_enabled_p
= stack_cache_enabled_p_1
;
244 show_stack_cache_enabled_p (struct ui_file
*file
, int from_tty
,
245 struct cmd_list_element
*c
, const char *value
)
247 fprintf_filtered (file
, _("Cache use for stack accesses is %s.\n"), value
);
250 /* Cache of memory operations, to speed up remote access. */
251 static DCACHE
*target_dcache
;
253 /* Invalidate the target dcache. */
256 target_dcache_invalidate (void)
258 dcache_invalidate (target_dcache
);
261 /* The user just typed 'target' without the name of a target. */
264 target_command (char *arg
, int from_tty
)
266 fputs_filtered ("Argument required (target name). Try `help target'\n",
270 /* Default target_has_* methods for process_stratum targets. */
273 default_child_has_all_memory (struct target_ops
*ops
)
275 /* If no inferior selected, then we can't read memory here. */
276 if (ptid_equal (inferior_ptid
, null_ptid
))
283 default_child_has_memory (struct target_ops
*ops
)
285 /* If no inferior selected, then we can't read memory here. */
286 if (ptid_equal (inferior_ptid
, null_ptid
))
293 default_child_has_stack (struct target_ops
*ops
)
295 /* If no inferior selected, there's no stack. */
296 if (ptid_equal (inferior_ptid
, null_ptid
))
303 default_child_has_registers (struct target_ops
*ops
)
305 /* Can't read registers from no inferior. */
306 if (ptid_equal (inferior_ptid
, null_ptid
))
313 default_child_has_execution (struct target_ops
*ops
, ptid_t the_ptid
)
315 /* If there's no thread selected, then we can't make it run through
317 if (ptid_equal (the_ptid
, null_ptid
))
325 target_has_all_memory_1 (void)
327 struct target_ops
*t
;
329 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
330 if (t
->to_has_all_memory (t
))
337 target_has_memory_1 (void)
339 struct target_ops
*t
;
341 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
342 if (t
->to_has_memory (t
))
349 target_has_stack_1 (void)
351 struct target_ops
*t
;
353 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
354 if (t
->to_has_stack (t
))
361 target_has_registers_1 (void)
363 struct target_ops
*t
;
365 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
366 if (t
->to_has_registers (t
))
373 target_has_execution_1 (ptid_t the_ptid
)
375 struct target_ops
*t
;
377 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
378 if (t
->to_has_execution (t
, the_ptid
))
385 target_has_execution_current (void)
387 return target_has_execution_1 (inferior_ptid
);
390 /* Add a possible target architecture to the list. */
393 add_target (struct target_ops
*t
)
395 /* Provide default values for all "must have" methods. */
396 if (t
->to_xfer_partial
== NULL
)
397 t
->to_xfer_partial
= default_xfer_partial
;
399 if (t
->to_has_all_memory
== NULL
)
400 t
->to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
402 if (t
->to_has_memory
== NULL
)
403 t
->to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
405 if (t
->to_has_stack
== NULL
)
406 t
->to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
408 if (t
->to_has_registers
== NULL
)
409 t
->to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
411 if (t
->to_has_execution
== NULL
)
412 t
->to_has_execution
= (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
416 target_struct_allocsize
= DEFAULT_ALLOCSIZE
;
417 target_structs
= (struct target_ops
**) xmalloc
418 (target_struct_allocsize
* sizeof (*target_structs
));
420 if (target_struct_size
>= target_struct_allocsize
)
422 target_struct_allocsize
*= 2;
423 target_structs
= (struct target_ops
**)
424 xrealloc ((char *) target_structs
,
425 target_struct_allocsize
* sizeof (*target_structs
));
427 target_structs
[target_struct_size
++] = t
;
429 if (targetlist
== NULL
)
430 add_prefix_cmd ("target", class_run
, target_command
, _("\
431 Connect to a target machine or process.\n\
432 The first argument is the type or protocol of the target machine.\n\
433 Remaining arguments are interpreted by the target protocol. For more\n\
434 information on the arguments for a particular protocol, type\n\
435 `help target ' followed by the protocol name."),
436 &targetlist
, "target ", 0, &cmdlist
);
437 add_cmd (t
->to_shortname
, no_class
, t
->to_open
, t
->to_doc
, &targetlist
);
450 struct target_ops
*t
;
452 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
453 if (t
->to_kill
!= NULL
)
456 fprintf_unfiltered (gdb_stdlog
, "target_kill ()\n");
466 target_load (char *arg
, int from_tty
)
468 target_dcache_invalidate ();
469 (*current_target
.to_load
) (arg
, from_tty
);
473 target_create_inferior (char *exec_file
, char *args
,
474 char **env
, int from_tty
)
476 struct target_ops
*t
;
478 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
480 if (t
->to_create_inferior
!= NULL
)
482 t
->to_create_inferior (t
, exec_file
, args
, env
, from_tty
);
484 fprintf_unfiltered (gdb_stdlog
,
485 "target_create_inferior (%s, %s, xxx, %d)\n",
486 exec_file
, args
, from_tty
);
491 internal_error (__FILE__
, __LINE__
,
492 _("could not find a target to create inferior"));
496 target_terminal_inferior (void)
498 /* A background resume (``run&'') should leave GDB in control of the
499 terminal. Use target_can_async_p, not target_is_async_p, since at
500 this point the target is not async yet. However, if sync_execution
501 is not set, we know it will become async prior to resume. */
502 if (target_can_async_p () && !sync_execution
)
505 /* If GDB is resuming the inferior in the foreground, install
506 inferior's terminal modes. */
507 (*current_target
.to_terminal_inferior
) ();
511 nomemory (CORE_ADDR memaddr
, char *myaddr
, int len
, int write
,
512 struct target_ops
*t
)
514 errno
= EIO
; /* Can't read/write this location. */
515 return 0; /* No bytes handled. */
521 error (_("You can't do that when your target is `%s'"),
522 current_target
.to_shortname
);
528 error (_("You can't do that without a process to debug."));
532 default_terminal_info (char *args
, int from_tty
)
534 printf_unfiltered (_("No saved terminal information.\n"));
537 /* A default implementation for the to_get_ada_task_ptid target method.
539 This function builds the PTID by using both LWP and TID as part of
540 the PTID lwp and tid elements. The pid used is the pid of the
544 default_get_ada_task_ptid (long lwp
, long tid
)
546 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
549 /* Go through the target stack from top to bottom, copying over zero
550 entries in current_target, then filling in still empty entries. In
551 effect, we are doing class inheritance through the pushed target
554 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
555 is currently implemented, is that it discards any knowledge of
556 which target an inherited method originally belonged to.
557 Consequently, new new target methods should instead explicitly and
558 locally search the target stack for the target that can handle the
562 update_current_target (void)
564 struct target_ops
*t
;
566 /* First, reset current's contents. */
567 memset (¤t_target
, 0, sizeof (current_target
));
569 #define INHERIT(FIELD, TARGET) \
570 if (!current_target.FIELD) \
571 current_target.FIELD = (TARGET)->FIELD
573 for (t
= target_stack
; t
; t
= t
->beneath
)
575 INHERIT (to_shortname
, t
);
576 INHERIT (to_longname
, t
);
578 /* Do not inherit to_open. */
579 /* Do not inherit to_close. */
580 /* Do not inherit to_attach. */
581 INHERIT (to_post_attach
, t
);
582 INHERIT (to_attach_no_wait
, t
);
583 /* Do not inherit to_detach. */
584 /* Do not inherit to_disconnect. */
585 /* Do not inherit to_resume. */
586 /* Do not inherit to_wait. */
587 /* Do not inherit to_fetch_registers. */
588 /* Do not inherit to_store_registers. */
589 INHERIT (to_prepare_to_store
, t
);
590 INHERIT (deprecated_xfer_memory
, t
);
591 INHERIT (to_files_info
, t
);
592 INHERIT (to_insert_breakpoint
, t
);
593 INHERIT (to_remove_breakpoint
, t
);
594 INHERIT (to_can_use_hw_breakpoint
, t
);
595 INHERIT (to_insert_hw_breakpoint
, t
);
596 INHERIT (to_remove_hw_breakpoint
, t
);
597 /* Do not inherit to_ranged_break_num_registers. */
598 INHERIT (to_insert_watchpoint
, t
);
599 INHERIT (to_remove_watchpoint
, t
);
600 INHERIT (to_stopped_data_address
, t
);
601 INHERIT (to_have_steppable_watchpoint
, t
);
602 INHERIT (to_have_continuable_watchpoint
, t
);
603 INHERIT (to_stopped_by_watchpoint
, t
);
604 INHERIT (to_watchpoint_addr_within_range
, t
);
605 INHERIT (to_region_ok_for_hw_watchpoint
, t
);
606 INHERIT (to_can_accel_watchpoint_condition
, t
);
607 INHERIT (to_terminal_init
, t
);
608 INHERIT (to_terminal_inferior
, t
);
609 INHERIT (to_terminal_ours_for_output
, t
);
610 INHERIT (to_terminal_ours
, t
);
611 INHERIT (to_terminal_save_ours
, t
);
612 INHERIT (to_terminal_info
, t
);
613 /* Do not inherit to_kill. */
614 INHERIT (to_load
, t
);
615 /* Do no inherit to_create_inferior. */
616 INHERIT (to_post_startup_inferior
, t
);
617 INHERIT (to_insert_fork_catchpoint
, t
);
618 INHERIT (to_remove_fork_catchpoint
, t
);
619 INHERIT (to_insert_vfork_catchpoint
, t
);
620 INHERIT (to_remove_vfork_catchpoint
, t
);
621 /* Do not inherit to_follow_fork. */
622 INHERIT (to_insert_exec_catchpoint
, t
);
623 INHERIT (to_remove_exec_catchpoint
, t
);
624 INHERIT (to_set_syscall_catchpoint
, t
);
625 INHERIT (to_has_exited
, t
);
626 /* Do not inherit to_mourn_inferior. */
627 INHERIT (to_can_run
, t
);
628 INHERIT (to_notice_signals
, t
);
629 /* Do not inherit to_thread_alive. */
630 /* Do not inherit to_find_new_threads. */
631 /* Do not inherit to_pid_to_str. */
632 INHERIT (to_extra_thread_info
, t
);
633 INHERIT (to_thread_name
, t
);
634 INHERIT (to_stop
, t
);
635 /* Do not inherit to_xfer_partial. */
636 INHERIT (to_rcmd
, t
);
637 INHERIT (to_pid_to_exec_file
, t
);
638 INHERIT (to_log_command
, t
);
639 INHERIT (to_stratum
, t
);
640 /* Do not inherit to_has_all_memory. */
641 /* Do not inherit to_has_memory. */
642 /* Do not inherit to_has_stack. */
643 /* Do not inherit to_has_registers. */
644 /* Do not inherit to_has_execution. */
645 INHERIT (to_has_thread_control
, t
);
646 INHERIT (to_can_async_p
, t
);
647 INHERIT (to_is_async_p
, t
);
648 INHERIT (to_async
, t
);
649 INHERIT (to_async_mask
, t
);
650 INHERIT (to_find_memory_regions
, t
);
651 INHERIT (to_make_corefile_notes
, t
);
652 INHERIT (to_get_bookmark
, t
);
653 INHERIT (to_goto_bookmark
, t
);
654 /* Do not inherit to_get_thread_local_address. */
655 INHERIT (to_can_execute_reverse
, t
);
656 INHERIT (to_thread_architecture
, t
);
657 /* Do not inherit to_read_description. */
658 INHERIT (to_get_ada_task_ptid
, t
);
659 /* Do not inherit to_search_memory. */
660 INHERIT (to_supports_multi_process
, t
);
661 INHERIT (to_trace_init
, t
);
662 INHERIT (to_download_tracepoint
, t
);
663 INHERIT (to_download_trace_state_variable
, t
);
664 INHERIT (to_trace_set_readonly_regions
, t
);
665 INHERIT (to_trace_start
, t
);
666 INHERIT (to_get_trace_status
, t
);
667 INHERIT (to_trace_stop
, t
);
668 INHERIT (to_trace_find
, t
);
669 INHERIT (to_get_trace_state_variable_value
, t
);
670 INHERIT (to_save_trace_data
, t
);
671 INHERIT (to_upload_tracepoints
, t
);
672 INHERIT (to_upload_trace_state_variables
, t
);
673 INHERIT (to_get_raw_trace_data
, t
);
674 INHERIT (to_set_disconnected_tracing
, t
);
675 INHERIT (to_set_circular_trace_buffer
, t
);
676 INHERIT (to_get_tib_address
, t
);
677 INHERIT (to_set_permissions
, t
);
678 INHERIT (to_static_tracepoint_marker_at
, t
);
679 INHERIT (to_static_tracepoint_markers_by_strid
, t
);
680 INHERIT (to_traceframe_info
, t
);
681 INHERIT (to_magic
, t
);
682 /* Do not inherit to_memory_map. */
683 /* Do not inherit to_flash_erase. */
684 /* Do not inherit to_flash_done. */
688 /* Clean up a target struct so it no longer has any zero pointers in
689 it. Some entries are defaulted to a method that print an error,
690 others are hard-wired to a standard recursive default. */
692 #define de_fault(field, value) \
693 if (!current_target.field) \
694 current_target.field = value
697 (void (*) (char *, int))
702 de_fault (to_post_attach
,
705 de_fault (to_prepare_to_store
,
706 (void (*) (struct regcache
*))
708 de_fault (deprecated_xfer_memory
,
709 (int (*) (CORE_ADDR
, gdb_byte
*, int, int,
710 struct mem_attrib
*, struct target_ops
*))
712 de_fault (to_files_info
,
713 (void (*) (struct target_ops
*))
715 de_fault (to_insert_breakpoint
,
716 memory_insert_breakpoint
);
717 de_fault (to_remove_breakpoint
,
718 memory_remove_breakpoint
);
719 de_fault (to_can_use_hw_breakpoint
,
720 (int (*) (int, int, int))
722 de_fault (to_insert_hw_breakpoint
,
723 (int (*) (struct gdbarch
*, struct bp_target_info
*))
725 de_fault (to_remove_hw_breakpoint
,
726 (int (*) (struct gdbarch
*, struct bp_target_info
*))
728 de_fault (to_insert_watchpoint
,
729 (int (*) (CORE_ADDR
, int, int, struct expression
*))
731 de_fault (to_remove_watchpoint
,
732 (int (*) (CORE_ADDR
, int, int, struct expression
*))
734 de_fault (to_stopped_by_watchpoint
,
737 de_fault (to_stopped_data_address
,
738 (int (*) (struct target_ops
*, CORE_ADDR
*))
740 de_fault (to_watchpoint_addr_within_range
,
741 default_watchpoint_addr_within_range
);
742 de_fault (to_region_ok_for_hw_watchpoint
,
743 default_region_ok_for_hw_watchpoint
);
744 de_fault (to_can_accel_watchpoint_condition
,
745 (int (*) (CORE_ADDR
, int, int, struct expression
*))
747 de_fault (to_terminal_init
,
750 de_fault (to_terminal_inferior
,
753 de_fault (to_terminal_ours_for_output
,
756 de_fault (to_terminal_ours
,
759 de_fault (to_terminal_save_ours
,
762 de_fault (to_terminal_info
,
763 default_terminal_info
);
765 (void (*) (char *, int))
767 de_fault (to_post_startup_inferior
,
770 de_fault (to_insert_fork_catchpoint
,
773 de_fault (to_remove_fork_catchpoint
,
776 de_fault (to_insert_vfork_catchpoint
,
779 de_fault (to_remove_vfork_catchpoint
,
782 de_fault (to_insert_exec_catchpoint
,
785 de_fault (to_remove_exec_catchpoint
,
788 de_fault (to_set_syscall_catchpoint
,
789 (int (*) (int, int, int, int, int *))
791 de_fault (to_has_exited
,
792 (int (*) (int, int, int *))
794 de_fault (to_can_run
,
796 de_fault (to_notice_signals
,
799 de_fault (to_extra_thread_info
,
800 (char *(*) (struct thread_info
*))
802 de_fault (to_thread_name
,
803 (char *(*) (struct thread_info
*))
808 current_target
.to_xfer_partial
= current_xfer_partial
;
810 (void (*) (char *, struct ui_file
*))
812 de_fault (to_pid_to_exec_file
,
816 (void (*) (void (*) (enum inferior_event_type
, void*), void*))
818 de_fault (to_async_mask
,
821 de_fault (to_thread_architecture
,
822 default_thread_architecture
);
823 current_target
.to_read_description
= NULL
;
824 de_fault (to_get_ada_task_ptid
,
825 (ptid_t (*) (long, long))
826 default_get_ada_task_ptid
);
827 de_fault (to_supports_multi_process
,
830 de_fault (to_trace_init
,
833 de_fault (to_download_tracepoint
,
834 (void (*) (struct breakpoint
*))
836 de_fault (to_download_trace_state_variable
,
837 (void (*) (struct trace_state_variable
*))
839 de_fault (to_trace_set_readonly_regions
,
842 de_fault (to_trace_start
,
845 de_fault (to_get_trace_status
,
846 (int (*) (struct trace_status
*))
848 de_fault (to_trace_stop
,
851 de_fault (to_trace_find
,
852 (int (*) (enum trace_find_type
, int, ULONGEST
, ULONGEST
, int *))
854 de_fault (to_get_trace_state_variable_value
,
855 (int (*) (int, LONGEST
*))
857 de_fault (to_save_trace_data
,
858 (int (*) (const char *))
860 de_fault (to_upload_tracepoints
,
861 (int (*) (struct uploaded_tp
**))
863 de_fault (to_upload_trace_state_variables
,
864 (int (*) (struct uploaded_tsv
**))
866 de_fault (to_get_raw_trace_data
,
867 (LONGEST (*) (gdb_byte
*, ULONGEST
, LONGEST
))
869 de_fault (to_set_disconnected_tracing
,
872 de_fault (to_set_circular_trace_buffer
,
875 de_fault (to_get_tib_address
,
876 (int (*) (ptid_t
, CORE_ADDR
*))
878 de_fault (to_set_permissions
,
881 de_fault (to_static_tracepoint_marker_at
,
882 (int (*) (CORE_ADDR
, struct static_tracepoint_marker
*))
884 de_fault (to_static_tracepoint_markers_by_strid
,
885 (VEC(static_tracepoint_marker_p
) * (*) (const char *))
887 de_fault (to_traceframe_info
,
888 (struct traceframe_info
* (*) (void))
892 /* Finally, position the target-stack beneath the squashed
893 "current_target". That way code looking for a non-inherited
894 target method can quickly and simply find it. */
895 current_target
.beneath
= target_stack
;
898 setup_target_debug ();
901 /* Push a new target type into the stack of the existing target accessors,
902 possibly superseding some of the existing accessors.
904 Rather than allow an empty stack, we always have the dummy target at
905 the bottom stratum, so we can call the function vectors without
909 push_target (struct target_ops
*t
)
911 struct target_ops
**cur
;
913 /* Check magic number. If wrong, it probably means someone changed
914 the struct definition, but not all the places that initialize one. */
915 if (t
->to_magic
!= OPS_MAGIC
)
917 fprintf_unfiltered (gdb_stderr
,
918 "Magic number of %s target struct wrong\n",
920 internal_error (__FILE__
, __LINE__
,
921 _("failed internal consistency check"));
924 /* Find the proper stratum to install this target in. */
925 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
927 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
931 /* If there's already targets at this stratum, remove them. */
932 /* FIXME: cagney/2003-10-15: I think this should be popping all
933 targets to CUR, and not just those at this stratum level. */
934 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
936 /* There's already something at this stratum level. Close it,
937 and un-hook it from the stack. */
938 struct target_ops
*tmp
= (*cur
);
940 (*cur
) = (*cur
)->beneath
;
942 target_close (tmp
, 0);
945 /* We have removed all targets in our stratum, now add the new one. */
949 update_current_target ();
952 /* Remove a target_ops vector from the stack, wherever it may be.
953 Return how many times it was removed (0 or 1). */
956 unpush_target (struct target_ops
*t
)
958 struct target_ops
**cur
;
959 struct target_ops
*tmp
;
961 if (t
->to_stratum
== dummy_stratum
)
962 internal_error (__FILE__
, __LINE__
,
963 _("Attempt to unpush the dummy target"));
965 /* Look for the specified target. Note that we assume that a target
966 can only occur once in the target stack. */
968 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
975 return 0; /* Didn't find target_ops, quit now. */
977 /* NOTE: cagney/2003-12-06: In '94 the close call was made
978 unconditional by moving it to before the above check that the
979 target was in the target stack (something about "Change the way
980 pushing and popping of targets work to support target overlays
981 and inheritance"). This doesn't make much sense - only open
982 targets should be closed. */
985 /* Unchain the target. */
987 (*cur
) = (*cur
)->beneath
;
990 update_current_target ();
998 target_close (target_stack
, 0); /* Let it clean up. */
999 if (unpush_target (target_stack
) == 1)
1002 fprintf_unfiltered (gdb_stderr
,
1003 "pop_target couldn't find target %s\n",
1004 current_target
.to_shortname
);
1005 internal_error (__FILE__
, __LINE__
,
1006 _("failed internal consistency check"));
1010 pop_all_targets_above (enum strata above_stratum
, int quitting
)
1012 while ((int) (current_target
.to_stratum
) > (int) above_stratum
)
1014 target_close (target_stack
, quitting
);
1015 if (!unpush_target (target_stack
))
1017 fprintf_unfiltered (gdb_stderr
,
1018 "pop_all_targets couldn't find target %s\n",
1019 target_stack
->to_shortname
);
1020 internal_error (__FILE__
, __LINE__
,
1021 _("failed internal consistency check"));
1028 pop_all_targets (int quitting
)
1030 pop_all_targets_above (dummy_stratum
, quitting
);
1033 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1036 target_is_pushed (struct target_ops
*t
)
1038 struct target_ops
**cur
;
1040 /* Check magic number. If wrong, it probably means someone changed
1041 the struct definition, but not all the places that initialize one. */
1042 if (t
->to_magic
!= OPS_MAGIC
)
1044 fprintf_unfiltered (gdb_stderr
,
1045 "Magic number of %s target struct wrong\n",
1047 internal_error (__FILE__
, __LINE__
,
1048 _("failed internal consistency check"));
1051 for (cur
= &target_stack
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
1058 /* Using the objfile specified in OBJFILE, find the address for the
1059 current thread's thread-local storage with offset OFFSET. */
1061 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1063 volatile CORE_ADDR addr
= 0;
1064 struct target_ops
*target
;
1066 for (target
= current_target
.beneath
;
1068 target
= target
->beneath
)
1070 if (target
->to_get_thread_local_address
!= NULL
)
1075 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch
))
1077 ptid_t ptid
= inferior_ptid
;
1078 volatile struct gdb_exception ex
;
1080 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1084 /* Fetch the load module address for this objfile. */
1085 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch
,
1087 /* If it's 0, throw the appropriate exception. */
1089 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR
,
1090 _("TLS load module not found"));
1092 addr
= target
->to_get_thread_local_address (target
, ptid
,
1095 /* If an error occurred, print TLS related messages here. Otherwise,
1096 throw the error to some higher catcher. */
1099 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1103 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1104 error (_("Cannot find thread-local variables "
1105 "in this thread library."));
1107 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1108 if (objfile_is_library
)
1109 error (_("Cannot find shared library `%s' in dynamic"
1110 " linker's load module list"), objfile
->name
);
1112 error (_("Cannot find executable file `%s' in dynamic"
1113 " linker's load module list"), objfile
->name
);
1115 case TLS_NOT_ALLOCATED_YET_ERROR
:
1116 if (objfile_is_library
)
1117 error (_("The inferior has not yet allocated storage for"
1118 " thread-local variables in\n"
1119 "the shared library `%s'\n"
1121 objfile
->name
, target_pid_to_str (ptid
));
1123 error (_("The inferior has not yet allocated storage for"
1124 " thread-local variables in\n"
1125 "the executable `%s'\n"
1127 objfile
->name
, target_pid_to_str (ptid
));
1129 case TLS_GENERIC_ERROR
:
1130 if (objfile_is_library
)
1131 error (_("Cannot find thread-local storage for %s, "
1132 "shared library %s:\n%s"),
1133 target_pid_to_str (ptid
),
1134 objfile
->name
, ex
.message
);
1136 error (_("Cannot find thread-local storage for %s, "
1137 "executable file %s:\n%s"),
1138 target_pid_to_str (ptid
),
1139 objfile
->name
, ex
.message
);
1142 throw_exception (ex
);
1147 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1148 TLS is an ABI-specific thing. But we don't do that yet. */
1150 error (_("Cannot find thread-local variables on this target"));
1156 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1158 /* target_read_string -- read a null terminated string, up to LEN bytes,
1159 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1160 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1161 is responsible for freeing it. Return the number of bytes successfully
1165 target_read_string (CORE_ADDR memaddr
, char **string
, int len
, int *errnop
)
1167 int tlen
, origlen
, offset
, i
;
1171 int buffer_allocated
;
1173 unsigned int nbytes_read
= 0;
1175 gdb_assert (string
);
1177 /* Small for testing. */
1178 buffer_allocated
= 4;
1179 buffer
= xmalloc (buffer_allocated
);
1186 tlen
= MIN (len
, 4 - (memaddr
& 3));
1187 offset
= memaddr
& 3;
1189 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
1192 /* The transfer request might have crossed the boundary to an
1193 unallocated region of memory. Retry the transfer, requesting
1197 errcode
= target_read_memory (memaddr
, buf
, 1);
1202 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
1206 bytes
= bufptr
- buffer
;
1207 buffer_allocated
*= 2;
1208 buffer
= xrealloc (buffer
, buffer_allocated
);
1209 bufptr
= buffer
+ bytes
;
1212 for (i
= 0; i
< tlen
; i
++)
1214 *bufptr
++ = buf
[i
+ offset
];
1215 if (buf
[i
+ offset
] == '\000')
1217 nbytes_read
+= i
+ 1;
1224 nbytes_read
+= tlen
;
1233 struct target_section_table
*
1234 target_get_section_table (struct target_ops
*target
)
1236 struct target_ops
*t
;
1239 fprintf_unfiltered (gdb_stdlog
, "target_get_section_table ()\n");
1241 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
1242 if (t
->to_get_section_table
!= NULL
)
1243 return (*t
->to_get_section_table
) (t
);
1248 /* Find a section containing ADDR. */
1250 struct target_section
*
1251 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1253 struct target_section_table
*table
= target_get_section_table (target
);
1254 struct target_section
*secp
;
1259 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
1261 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
1267 /* Read memory from the live target, even if currently inspecting a
1268 traceframe. The return is the same as that of target_read. */
1271 target_read_live_memory (enum target_object object
,
1272 ULONGEST memaddr
, gdb_byte
*myaddr
, LONGEST len
)
1275 struct cleanup
*cleanup
;
1277 /* Switch momentarily out of tfind mode so to access live memory.
1278 Note that this must not clear global state, such as the frame
1279 cache, which must still remain valid for the previous traceframe.
1280 We may be _building_ the frame cache at this point. */
1281 cleanup
= make_cleanup_restore_traceframe_number ();
1282 set_traceframe_number (-1);
1284 ret
= target_read (current_target
.beneath
, object
, NULL
,
1285 myaddr
, memaddr
, len
);
1287 do_cleanups (cleanup
);
1291 /* Using the set of read-only target sections of OPS, read live
1292 read-only memory. Note that the actual reads start from the
1293 top-most target again.
1295 For interface/parameters/return description see target.h,
1299 memory_xfer_live_readonly_partial (struct target_ops
*ops
,
1300 enum target_object object
,
1301 gdb_byte
*readbuf
, ULONGEST memaddr
,
1304 struct target_section
*secp
;
1305 struct target_section_table
*table
;
1307 secp
= target_section_by_addr (ops
, memaddr
);
1309 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1312 struct target_section
*p
;
1313 ULONGEST memend
= memaddr
+ len
;
1315 table
= target_get_section_table (ops
);
1317 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
1319 if (memaddr
>= p
->addr
)
1321 if (memend
<= p
->endaddr
)
1323 /* Entire transfer is within this section. */
1324 return target_read_live_memory (object
, memaddr
,
1327 else if (memaddr
>= p
->endaddr
)
1329 /* This section ends before the transfer starts. */
1334 /* This section overlaps the transfer. Just do half. */
1335 len
= p
->endaddr
- memaddr
;
1336 return target_read_live_memory (object
, memaddr
,
1346 /* Perform a partial memory transfer.
1347 For docs see target.h, to_xfer_partial. */
1350 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1351 void *readbuf
, const void *writebuf
, ULONGEST memaddr
,
1356 struct mem_region
*region
;
1357 struct inferior
*inf
;
1359 /* Zero length requests are ok and require no work. */
1363 /* For accesses to unmapped overlay sections, read directly from
1364 files. Must do this first, as MEMADDR may need adjustment. */
1365 if (readbuf
!= NULL
&& overlay_debugging
)
1367 struct obj_section
*section
= find_pc_overlay (memaddr
);
1369 if (pc_in_unmapped_range (memaddr
, section
))
1371 struct target_section_table
*table
1372 = target_get_section_table (ops
);
1373 const char *section_name
= section
->the_bfd_section
->name
;
1375 memaddr
= overlay_mapped_address (memaddr
, section
);
1376 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1379 table
->sections_end
,
1384 /* Try the executable files, if "trust-readonly-sections" is set. */
1385 if (readbuf
!= NULL
&& trust_readonly
)
1387 struct target_section
*secp
;
1388 struct target_section_table
*table
;
1390 secp
= target_section_by_addr (ops
, memaddr
);
1392 && (bfd_get_section_flags (secp
->bfd
, secp
->the_bfd_section
)
1395 table
= target_get_section_table (ops
);
1396 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1399 table
->sections_end
,
1404 /* If reading unavailable memory in the context of traceframes, and
1405 this address falls within a read-only section, fallback to
1406 reading from live memory. */
1407 if (readbuf
!= NULL
&& get_traceframe_number () != -1)
1409 VEC(mem_range_s
) *available
;
1411 /* If we fail to get the set of available memory, then the
1412 target does not support querying traceframe info, and so we
1413 attempt reading from the traceframe anyway (assuming the
1414 target implements the old QTro packet then). */
1415 if (traceframe_available_memory (&available
, memaddr
, len
))
1417 struct cleanup
*old_chain
;
1419 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
1421 if (VEC_empty (mem_range_s
, available
)
1422 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
1424 /* Don't read into the traceframe's available
1426 if (!VEC_empty (mem_range_s
, available
))
1428 LONGEST oldlen
= len
;
1430 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
1431 gdb_assert (len
<= oldlen
);
1434 do_cleanups (old_chain
);
1436 /* This goes through the topmost target again. */
1437 res
= memory_xfer_live_readonly_partial (ops
, object
,
1438 readbuf
, memaddr
, len
);
1442 /* No use trying further, we know some memory starting
1443 at MEMADDR isn't available. */
1447 /* Don't try to read more than how much is available, in
1448 case the target implements the deprecated QTro packet to
1449 cater for older GDBs (the target's knowledge of read-only
1450 sections may be outdated by now). */
1451 len
= VEC_index (mem_range_s
, available
, 0)->length
;
1453 do_cleanups (old_chain
);
1457 /* Try GDB's internal data cache. */
1458 region
= lookup_mem_region (memaddr
);
1459 /* region->hi == 0 means there's no upper bound. */
1460 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1463 reg_len
= region
->hi
- memaddr
;
1465 switch (region
->attrib
.mode
)
1468 if (writebuf
!= NULL
)
1473 if (readbuf
!= NULL
)
1478 /* We only support writing to flash during "load" for now. */
1479 if (writebuf
!= NULL
)
1480 error (_("Writing to flash memory forbidden in this context"));
1487 if (!ptid_equal (inferior_ptid
, null_ptid
))
1488 inf
= find_inferior_pid (ptid_get_pid (inferior_ptid
));
1493 /* The dcache reads whole cache lines; that doesn't play well
1494 with reading from a trace buffer, because reading outside of
1495 the collected memory range fails. */
1496 && get_traceframe_number () == -1
1497 && (region
->attrib
.cache
1498 || (stack_cache_enabled_p
&& object
== TARGET_OBJECT_STACK_MEMORY
)))
1500 if (readbuf
!= NULL
)
1501 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
, readbuf
,
1504 /* FIXME drow/2006-08-09: If we're going to preserve const
1505 correctness dcache_xfer_memory should take readbuf and
1507 res
= dcache_xfer_memory (ops
, target_dcache
, memaddr
,
1514 if (readbuf
&& !show_memory_breakpoints
)
1515 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1520 /* If none of those methods found the memory we wanted, fall back
1521 to a target partial transfer. Normally a single call to
1522 to_xfer_partial is enough; if it doesn't recognize an object
1523 it will call the to_xfer_partial of the next target down.
1524 But for memory this won't do. Memory is the only target
1525 object which can be read from more than one valid target.
1526 A core file, for instance, could have some of memory but
1527 delegate other bits to the target below it. So, we must
1528 manually try all targets. */
1532 res
= ops
->to_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1533 readbuf
, writebuf
, memaddr
, reg_len
);
1537 /* We want to continue past core files to executables, but not
1538 past a running target's memory. */
1539 if (ops
->to_has_all_memory (ops
))
1544 while (ops
!= NULL
);
1546 if (res
> 0 && readbuf
!= NULL
&& !show_memory_breakpoints
)
1547 breakpoint_restore_shadows (readbuf
, memaddr
, reg_len
);
1549 /* Make sure the cache gets updated no matter what - if we are writing
1550 to the stack. Even if this write is not tagged as such, we still need
1551 to update the cache. */
1556 && !region
->attrib
.cache
1557 && stack_cache_enabled_p
1558 && object
!= TARGET_OBJECT_STACK_MEMORY
)
1560 dcache_update (target_dcache
, memaddr
, (void *) writebuf
, res
);
1563 /* If we still haven't got anything, return the last error. We
1569 restore_show_memory_breakpoints (void *arg
)
1571 show_memory_breakpoints
= (uintptr_t) arg
;
1575 make_show_memory_breakpoints_cleanup (int show
)
1577 int current
= show_memory_breakpoints
;
1579 show_memory_breakpoints
= show
;
1580 return make_cleanup (restore_show_memory_breakpoints
,
1581 (void *) (uintptr_t) current
);
1584 /* For docs see target.h, to_xfer_partial. */
1587 target_xfer_partial (struct target_ops
*ops
,
1588 enum target_object object
, const char *annex
,
1589 void *readbuf
, const void *writebuf
,
1590 ULONGEST offset
, LONGEST len
)
1594 gdb_assert (ops
->to_xfer_partial
!= NULL
);
1596 if (writebuf
&& !may_write_memory
)
1597 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1598 core_addr_to_string_nz (offset
), plongest (len
));
1600 /* If this is a memory transfer, let the memory-specific code
1601 have a look at it instead. Memory transfers are more
1603 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
)
1604 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1605 writebuf
, offset
, len
);
1608 enum target_object raw_object
= object
;
1610 /* If this is a raw memory transfer, request the normal
1611 memory object from other layers. */
1612 if (raw_object
== TARGET_OBJECT_RAW_MEMORY
)
1613 raw_object
= TARGET_OBJECT_MEMORY
;
1615 retval
= ops
->to_xfer_partial (ops
, raw_object
, annex
, readbuf
,
1616 writebuf
, offset
, len
);
1621 const unsigned char *myaddr
= NULL
;
1623 fprintf_unfiltered (gdb_stdlog
,
1624 "%s:target_xfer_partial "
1625 "(%d, %s, %s, %s, %s, %s) = %s",
1628 (annex
? annex
: "(null)"),
1629 host_address_to_string (readbuf
),
1630 host_address_to_string (writebuf
),
1631 core_addr_to_string_nz (offset
),
1632 plongest (len
), plongest (retval
));
1638 if (retval
> 0 && myaddr
!= NULL
)
1642 fputs_unfiltered (", bytes =", gdb_stdlog
);
1643 for (i
= 0; i
< retval
; i
++)
1645 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1647 if (targetdebug
< 2 && i
> 0)
1649 fprintf_unfiltered (gdb_stdlog
, " ...");
1652 fprintf_unfiltered (gdb_stdlog
, "\n");
1655 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1659 fputc_unfiltered ('\n', gdb_stdlog
);
1664 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1665 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1666 if any error occurs.
1668 If an error occurs, no guarantee is made about the contents of the data at
1669 MYADDR. In particular, the caller should not depend upon partial reads
1670 filling the buffer with good data. There is no way for the caller to know
1671 how much good data might have been transfered anyway. Callers that can
1672 deal with partial reads should call target_read (which will retry until
1673 it makes no progress, and then return how much was transferred). */
1676 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1678 /* Dispatch to the topmost target, not the flattened current_target.
1679 Memory accesses check target->to_has_(all_)memory, and the
1680 flattened target doesn't inherit those. */
1681 if (target_read (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1682 myaddr
, memaddr
, len
) == len
)
1688 /* Like target_read_memory, but specify explicitly that this is a read from
1689 the target's stack. This may trigger different cache behavior. */
1692 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
)
1694 /* Dispatch to the topmost target, not the flattened current_target.
1695 Memory accesses check target->to_has_(all_)memory, and the
1696 flattened target doesn't inherit those. */
1698 if (target_read (current_target
.beneath
, TARGET_OBJECT_STACK_MEMORY
, NULL
,
1699 myaddr
, memaddr
, len
) == len
)
1705 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1706 Returns either 0 for success or an errno value if any error occurs.
1707 If an error occurs, no guarantee is made about how much data got written.
1708 Callers that can deal with partial writes should call target_write. */
1711 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, int len
)
1713 /* Dispatch to the topmost target, not the flattened current_target.
1714 Memory accesses check target->to_has_(all_)memory, and the
1715 flattened target doesn't inherit those. */
1716 if (target_write (current_target
.beneath
, TARGET_OBJECT_MEMORY
, NULL
,
1717 myaddr
, memaddr
, len
) == len
)
1723 /* Fetch the target's memory map. */
1726 target_memory_map (void)
1728 VEC(mem_region_s
) *result
;
1729 struct mem_region
*last_one
, *this_one
;
1731 struct target_ops
*t
;
1734 fprintf_unfiltered (gdb_stdlog
, "target_memory_map ()\n");
1736 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1737 if (t
->to_memory_map
!= NULL
)
1743 result
= t
->to_memory_map (t
);
1747 qsort (VEC_address (mem_region_s
, result
),
1748 VEC_length (mem_region_s
, result
),
1749 sizeof (struct mem_region
), mem_region_cmp
);
1751 /* Check that regions do not overlap. Simultaneously assign
1752 a numbering for the "mem" commands to use to refer to
1755 for (ix
= 0; VEC_iterate (mem_region_s
, result
, ix
, this_one
); ix
++)
1757 this_one
->number
= ix
;
1759 if (last_one
&& last_one
->hi
> this_one
->lo
)
1761 warning (_("Overlapping regions in memory map: ignoring"));
1762 VEC_free (mem_region_s
, result
);
1765 last_one
= this_one
;
1772 target_flash_erase (ULONGEST address
, LONGEST length
)
1774 struct target_ops
*t
;
1776 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1777 if (t
->to_flash_erase
!= NULL
)
1780 fprintf_unfiltered (gdb_stdlog
, "target_flash_erase (%s, %s)\n",
1781 hex_string (address
), phex (length
, 0));
1782 t
->to_flash_erase (t
, address
, length
);
1790 target_flash_done (void)
1792 struct target_ops
*t
;
1794 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
1795 if (t
->to_flash_done
!= NULL
)
1798 fprintf_unfiltered (gdb_stdlog
, "target_flash_done\n");
1799 t
->to_flash_done (t
);
1807 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1808 struct cmd_list_element
*c
, const char *value
)
1810 fprintf_filtered (file
,
1811 _("Mode for reading from readonly sections is %s.\n"),
1815 /* More generic transfers. */
1818 default_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1819 const char *annex
, gdb_byte
*readbuf
,
1820 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1822 if (object
== TARGET_OBJECT_MEMORY
1823 && ops
->deprecated_xfer_memory
!= NULL
)
1824 /* If available, fall back to the target's
1825 "deprecated_xfer_memory" method. */
1830 if (writebuf
!= NULL
)
1832 void *buffer
= xmalloc (len
);
1833 struct cleanup
*cleanup
= make_cleanup (xfree
, buffer
);
1835 memcpy (buffer
, writebuf
, len
);
1836 xfered
= ops
->deprecated_xfer_memory (offset
, buffer
, len
,
1837 1/*write*/, NULL
, ops
);
1838 do_cleanups (cleanup
);
1840 if (readbuf
!= NULL
)
1841 xfered
= ops
->deprecated_xfer_memory (offset
, readbuf
, len
,
1842 0/*read*/, NULL
, ops
);
1845 else if (xfered
== 0 && errno
== 0)
1846 /* "deprecated_xfer_memory" uses 0, cross checked against
1847 ERRNO as one indication of an error. */
1852 else if (ops
->beneath
!= NULL
)
1853 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1854 readbuf
, writebuf
, offset
, len
);
1859 /* The xfer_partial handler for the topmost target. Unlike the default,
1860 it does not need to handle memory specially; it just passes all
1861 requests down the stack. */
1864 current_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1865 const char *annex
, gdb_byte
*readbuf
,
1866 const gdb_byte
*writebuf
, ULONGEST offset
, LONGEST len
)
1868 if (ops
->beneath
!= NULL
)
1869 return ops
->beneath
->to_xfer_partial (ops
->beneath
, object
, annex
,
1870 readbuf
, writebuf
, offset
, len
);
1875 /* Target vector read/write partial wrapper functions. */
1878 target_read_partial (struct target_ops
*ops
,
1879 enum target_object object
,
1880 const char *annex
, gdb_byte
*buf
,
1881 ULONGEST offset
, LONGEST len
)
1883 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
);
1887 target_write_partial (struct target_ops
*ops
,
1888 enum target_object object
,
1889 const char *annex
, const gdb_byte
*buf
,
1890 ULONGEST offset
, LONGEST len
)
1892 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
);
1895 /* Wrappers to perform the full transfer. */
1897 /* For docs on target_read see target.h. */
1900 target_read (struct target_ops
*ops
,
1901 enum target_object object
,
1902 const char *annex
, gdb_byte
*buf
,
1903 ULONGEST offset
, LONGEST len
)
1907 while (xfered
< len
)
1909 LONGEST xfer
= target_read_partial (ops
, object
, annex
,
1910 (gdb_byte
*) buf
+ xfered
,
1911 offset
+ xfered
, len
- xfered
);
1913 /* Call an observer, notifying them of the xfer progress? */
1924 /* Assuming that the entire [begin, end) range of memory cannot be
1925 read, try to read whatever subrange is possible to read.
1927 The function returns, in RESULT, either zero or one memory block.
1928 If there's a readable subrange at the beginning, it is completely
1929 read and returned. Any further readable subrange will not be read.
1930 Otherwise, if there's a readable subrange at the end, it will be
1931 completely read and returned. Any readable subranges before it
1932 (obviously, not starting at the beginning), will be ignored. In
1933 other cases -- either no readable subrange, or readable subrange(s)
1934 that is neither at the beginning, or end, nothing is returned.
1936 The purpose of this function is to handle a read across a boundary
1937 of accessible memory in a case when memory map is not available.
1938 The above restrictions are fine for this case, but will give
1939 incorrect results if the memory is 'patchy'. However, supporting
1940 'patchy' memory would require trying to read every single byte,
1941 and it seems unacceptable solution. Explicit memory map is
1942 recommended for this case -- and target_read_memory_robust will
1943 take care of reading multiple ranges then. */
1946 read_whatever_is_readable (struct target_ops
*ops
,
1947 ULONGEST begin
, ULONGEST end
,
1948 VEC(memory_read_result_s
) **result
)
1950 gdb_byte
*buf
= xmalloc (end
- begin
);
1951 ULONGEST current_begin
= begin
;
1952 ULONGEST current_end
= end
;
1954 memory_read_result_s r
;
1956 /* If we previously failed to read 1 byte, nothing can be done here. */
1957 if (end
- begin
<= 1)
1963 /* Check that either first or the last byte is readable, and give up
1964 if not. This heuristic is meant to permit reading accessible memory
1965 at the boundary of accessible region. */
1966 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1967 buf
, begin
, 1) == 1)
1972 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1973 buf
+ (end
-begin
) - 1, end
- 1, 1) == 1)
1984 /* Loop invariant is that the [current_begin, current_end) was previously
1985 found to be not readable as a whole.
1987 Note loop condition -- if the range has 1 byte, we can't divide the range
1988 so there's no point trying further. */
1989 while (current_end
- current_begin
> 1)
1991 ULONGEST first_half_begin
, first_half_end
;
1992 ULONGEST second_half_begin
, second_half_end
;
1994 ULONGEST middle
= current_begin
+ (current_end
- current_begin
)/2;
1998 first_half_begin
= current_begin
;
1999 first_half_end
= middle
;
2000 second_half_begin
= middle
;
2001 second_half_end
= current_end
;
2005 first_half_begin
= middle
;
2006 first_half_end
= current_end
;
2007 second_half_begin
= current_begin
;
2008 second_half_end
= middle
;
2011 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2012 buf
+ (first_half_begin
- begin
),
2014 first_half_end
- first_half_begin
);
2016 if (xfer
== first_half_end
- first_half_begin
)
2018 /* This half reads up fine. So, the error must be in the
2020 current_begin
= second_half_begin
;
2021 current_end
= second_half_end
;
2025 /* This half is not readable. Because we've tried one byte, we
2026 know some part of this half if actually redable. Go to the next
2027 iteration to divide again and try to read.
2029 We don't handle the other half, because this function only tries
2030 to read a single readable subrange. */
2031 current_begin
= first_half_begin
;
2032 current_end
= first_half_end
;
2038 /* The [begin, current_begin) range has been read. */
2040 r
.end
= current_begin
;
2045 /* The [current_end, end) range has been read. */
2046 LONGEST rlen
= end
- current_end
;
2048 r
.data
= xmalloc (rlen
);
2049 memcpy (r
.data
, buf
+ current_end
- begin
, rlen
);
2050 r
.begin
= current_end
;
2054 VEC_safe_push(memory_read_result_s
, (*result
), &r
);
2058 free_memory_read_result_vector (void *x
)
2060 VEC(memory_read_result_s
) *v
= x
;
2061 memory_read_result_s
*current
;
2064 for (ix
= 0; VEC_iterate (memory_read_result_s
, v
, ix
, current
); ++ix
)
2066 xfree (current
->data
);
2068 VEC_free (memory_read_result_s
, v
);
2071 VEC(memory_read_result_s
) *
2072 read_memory_robust (struct target_ops
*ops
, ULONGEST offset
, LONGEST len
)
2074 VEC(memory_read_result_s
) *result
= 0;
2077 while (xfered
< len
)
2079 struct mem_region
*region
= lookup_mem_region (offset
+ xfered
);
2082 /* If there is no explicit region, a fake one should be created. */
2083 gdb_assert (region
);
2085 if (region
->hi
== 0)
2086 rlen
= len
- xfered
;
2088 rlen
= region
->hi
- offset
;
2090 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2092 /* Cannot read this region. Note that we can end up here only
2093 if the region is explicitly marked inaccessible, or
2094 'inaccessible-by-default' is in effect. */
2099 LONGEST to_read
= min (len
- xfered
, rlen
);
2100 gdb_byte
*buffer
= (gdb_byte
*)xmalloc (to_read
);
2102 LONGEST xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2103 (gdb_byte
*) buffer
,
2104 offset
+ xfered
, to_read
);
2105 /* Call an observer, notifying them of the xfer progress? */
2108 /* Got an error reading full chunk. See if maybe we can read
2111 read_whatever_is_readable (ops
, offset
+ xfered
,
2112 offset
+ xfered
+ to_read
, &result
);
2117 struct memory_read_result r
;
2119 r
.begin
= offset
+ xfered
;
2120 r
.end
= r
.begin
+ xfer
;
2121 VEC_safe_push (memory_read_result_s
, result
, &r
);
2131 /* An alternative to target_write with progress callbacks. */
2134 target_write_with_progress (struct target_ops
*ops
,
2135 enum target_object object
,
2136 const char *annex
, const gdb_byte
*buf
,
2137 ULONGEST offset
, LONGEST len
,
2138 void (*progress
) (ULONGEST
, void *), void *baton
)
2142 /* Give the progress callback a chance to set up. */
2144 (*progress
) (0, baton
);
2146 while (xfered
< len
)
2148 LONGEST xfer
= target_write_partial (ops
, object
, annex
,
2149 (gdb_byte
*) buf
+ xfered
,
2150 offset
+ xfered
, len
- xfered
);
2158 (*progress
) (xfer
, baton
);
2166 /* For docs on target_write see target.h. */
2169 target_write (struct target_ops
*ops
,
2170 enum target_object object
,
2171 const char *annex
, const gdb_byte
*buf
,
2172 ULONGEST offset
, LONGEST len
)
2174 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2178 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2179 the size of the transferred data. PADDING additional bytes are
2180 available in *BUF_P. This is a helper function for
2181 target_read_alloc; see the declaration of that function for more
2185 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2186 const char *annex
, gdb_byte
**buf_p
, int padding
)
2188 size_t buf_alloc
, buf_pos
;
2192 /* This function does not have a length parameter; it reads the
2193 entire OBJECT). Also, it doesn't support objects fetched partly
2194 from one target and partly from another (in a different stratum,
2195 e.g. a core file and an executable). Both reasons make it
2196 unsuitable for reading memory. */
2197 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2199 /* Start by reading up to 4K at a time. The target will throttle
2200 this number down if necessary. */
2202 buf
= xmalloc (buf_alloc
);
2206 n
= target_read_partial (ops
, object
, annex
, &buf
[buf_pos
],
2207 buf_pos
, buf_alloc
- buf_pos
- padding
);
2210 /* An error occurred. */
2216 /* Read all there was. */
2226 /* If the buffer is filling up, expand it. */
2227 if (buf_alloc
< buf_pos
* 2)
2230 buf
= xrealloc (buf
, buf_alloc
);
2237 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2238 the size of the transferred data. See the declaration in "target.h"
2239 function for more information about the return value. */
2242 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2243 const char *annex
, gdb_byte
**buf_p
)
2245 return target_read_alloc_1 (ops
, object
, annex
, buf_p
, 0);
2248 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2249 returned as a string, allocated using xmalloc. If an error occurs
2250 or the transfer is unsupported, NULL is returned. Empty objects
2251 are returned as allocated but empty strings. A warning is issued
2252 if the result contains any embedded NUL bytes. */
2255 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2259 LONGEST transferred
;
2261 transferred
= target_read_alloc_1 (ops
, object
, annex
, &buffer
, 1);
2263 if (transferred
< 0)
2266 if (transferred
== 0)
2267 return xstrdup ("");
2269 buffer
[transferred
] = 0;
2270 if (strlen (buffer
) < transferred
)
2271 warning (_("target object %d, annex %s, "
2272 "contained unexpected null characters"),
2273 (int) object
, annex
? annex
: "(none)");
2275 return (char *) buffer
;
2278 /* Memory transfer methods. */
2281 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2284 /* This method is used to read from an alternate, non-current
2285 target. This read must bypass the overlay support (as symbols
2286 don't match this target), and GDB's internal cache (wrong cache
2287 for this target). */
2288 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2290 memory_error (EIO
, addr
);
2294 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2295 int len
, enum bfd_endian byte_order
)
2297 gdb_byte buf
[sizeof (ULONGEST
)];
2299 gdb_assert (len
<= sizeof (buf
));
2300 get_target_memory (ops
, addr
, buf
, len
);
2301 return extract_unsigned_integer (buf
, len
, byte_order
);
2305 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2306 struct bp_target_info
*bp_tgt
)
2308 if (!may_insert_breakpoints
)
2310 warning (_("May not insert breakpoints"));
2314 return (*current_target
.to_insert_breakpoint
) (gdbarch
, bp_tgt
);
2318 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2319 struct bp_target_info
*bp_tgt
)
2321 /* This is kind of a weird case to handle, but the permission might
2322 have been changed after breakpoints were inserted - in which case
2323 we should just take the user literally and assume that any
2324 breakpoints should be left in place. */
2325 if (!may_insert_breakpoints
)
2327 warning (_("May not remove breakpoints"));
2331 return (*current_target
.to_remove_breakpoint
) (gdbarch
, bp_tgt
);
2335 target_info (char *args
, int from_tty
)
2337 struct target_ops
*t
;
2338 int has_all_mem
= 0;
2340 if (symfile_objfile
!= NULL
)
2341 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile
->name
);
2343 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2345 if (!(*t
->to_has_memory
) (t
))
2348 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
2351 printf_unfiltered (_("\tWhile running this, "
2352 "GDB does not access memory from...\n"));
2353 printf_unfiltered ("%s:\n", t
->to_longname
);
2354 (t
->to_files_info
) (t
);
2355 has_all_mem
= (*t
->to_has_all_memory
) (t
);
2359 /* This function is called before any new inferior is created, e.g.
2360 by running a program, attaching, or connecting to a target.
2361 It cleans up any state from previous invocations which might
2362 change between runs. This is a subset of what target_preopen
2363 resets (things which might change between targets). */
2366 target_pre_inferior (int from_tty
)
2368 /* Clear out solib state. Otherwise the solib state of the previous
2369 inferior might have survived and is entirely wrong for the new
2370 target. This has been observed on GNU/Linux using glibc 2.3. How
2382 Cannot access memory at address 0xdeadbeef
2385 /* In some OSs, the shared library list is the same/global/shared
2386 across inferiors. If code is shared between processes, so are
2387 memory regions and features. */
2388 if (!gdbarch_has_global_solist (target_gdbarch
))
2390 no_shared_libraries (NULL
, from_tty
);
2392 invalidate_target_mem_regions ();
2394 target_clear_description ();
2398 /* Callback for iterate_over_inferiors. Gets rid of the given
2402 dispose_inferior (struct inferior
*inf
, void *args
)
2404 struct thread_info
*thread
;
2406 thread
= any_thread_of_process (inf
->pid
);
2409 switch_to_thread (thread
->ptid
);
2411 /* Core inferiors actually should be detached, not killed. */
2412 if (target_has_execution
)
2415 target_detach (NULL
, 0);
2421 /* This is to be called by the open routine before it does
2425 target_preopen (int from_tty
)
2429 if (have_inferiors ())
2432 || !have_live_inferiors ()
2433 || query (_("A program is being debugged already. Kill it? ")))
2434 iterate_over_inferiors (dispose_inferior
, NULL
);
2436 error (_("Program not killed."));
2439 /* Calling target_kill may remove the target from the stack. But if
2440 it doesn't (which seems like a win for UDI), remove it now. */
2441 /* Leave the exec target, though. The user may be switching from a
2442 live process to a core of the same program. */
2443 pop_all_targets_above (file_stratum
, 0);
2445 target_pre_inferior (from_tty
);
2448 /* Detach a target after doing deferred register stores. */
2451 target_detach (char *args
, int from_tty
)
2453 struct target_ops
* t
;
2455 if (gdbarch_has_global_breakpoints (target_gdbarch
))
2456 /* Don't remove global breakpoints here. They're removed on
2457 disconnection from the target. */
2460 /* If we're in breakpoints-always-inserted mode, have to remove
2461 them before detaching. */
2462 remove_breakpoints_pid (PIDGET (inferior_ptid
));
2464 prepare_for_detach ();
2466 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2468 if (t
->to_detach
!= NULL
)
2470 t
->to_detach (t
, args
, from_tty
);
2472 fprintf_unfiltered (gdb_stdlog
, "target_detach (%s, %d)\n",
2478 internal_error (__FILE__
, __LINE__
, _("could not find a target to detach"));
2482 target_disconnect (char *args
, int from_tty
)
2484 struct target_ops
*t
;
2486 /* If we're in breakpoints-always-inserted mode or if breakpoints
2487 are global across processes, we have to remove them before
2489 remove_breakpoints ();
2491 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2492 if (t
->to_disconnect
!= NULL
)
2495 fprintf_unfiltered (gdb_stdlog
, "target_disconnect (%s, %d)\n",
2497 t
->to_disconnect (t
, args
, from_tty
);
2505 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2507 struct target_ops
*t
;
2509 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2511 if (t
->to_wait
!= NULL
)
2513 ptid_t retval
= (*t
->to_wait
) (t
, ptid
, status
, options
);
2517 char *status_string
;
2519 status_string
= target_waitstatus_to_string (status
);
2520 fprintf_unfiltered (gdb_stdlog
,
2521 "target_wait (%d, status) = %d, %s\n",
2522 PIDGET (ptid
), PIDGET (retval
),
2524 xfree (status_string
);
2535 target_pid_to_str (ptid_t ptid
)
2537 struct target_ops
*t
;
2539 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2541 if (t
->to_pid_to_str
!= NULL
)
2542 return (*t
->to_pid_to_str
) (t
, ptid
);
2545 return normal_pid_to_str (ptid
);
2549 target_thread_name (struct thread_info
*info
)
2551 struct target_ops
*t
;
2553 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2555 if (t
->to_thread_name
!= NULL
)
2556 return (*t
->to_thread_name
) (info
);
2563 target_resume (ptid_t ptid
, int step
, enum target_signal signal
)
2565 struct target_ops
*t
;
2567 target_dcache_invalidate ();
2569 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2571 if (t
->to_resume
!= NULL
)
2573 t
->to_resume (t
, ptid
, step
, signal
);
2575 fprintf_unfiltered (gdb_stdlog
, "target_resume (%d, %s, %s)\n",
2577 step
? "step" : "continue",
2578 target_signal_to_name (signal
));
2580 registers_changed_ptid (ptid
);
2581 set_executing (ptid
, 1);
2582 set_running (ptid
, 1);
2583 clear_inline_frame_state (ptid
);
2590 /* Look through the list of possible targets for a target that can
2594 target_follow_fork (int follow_child
)
2596 struct target_ops
*t
;
2598 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2600 if (t
->to_follow_fork
!= NULL
)
2602 int retval
= t
->to_follow_fork (t
, follow_child
);
2605 fprintf_unfiltered (gdb_stdlog
, "target_follow_fork (%d) = %d\n",
2606 follow_child
, retval
);
2611 /* Some target returned a fork event, but did not know how to follow it. */
2612 internal_error (__FILE__
, __LINE__
,
2613 _("could not find a target to follow fork"));
2617 target_mourn_inferior (void)
2619 struct target_ops
*t
;
2621 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2623 if (t
->to_mourn_inferior
!= NULL
)
2625 t
->to_mourn_inferior (t
);
2627 fprintf_unfiltered (gdb_stdlog
, "target_mourn_inferior ()\n");
2629 /* We no longer need to keep handles on any of the object files.
2630 Make sure to release them to avoid unnecessarily locking any
2631 of them while we're not actually debugging. */
2632 bfd_cache_close_all ();
2638 internal_error (__FILE__
, __LINE__
,
2639 _("could not find a target to follow mourn inferior"));
2642 /* Look for a target which can describe architectural features, starting
2643 from TARGET. If we find one, return its description. */
2645 const struct target_desc
*
2646 target_read_description (struct target_ops
*target
)
2648 struct target_ops
*t
;
2650 for (t
= target
; t
!= NULL
; t
= t
->beneath
)
2651 if (t
->to_read_description
!= NULL
)
2653 const struct target_desc
*tdesc
;
2655 tdesc
= t
->to_read_description (t
);
2663 /* The default implementation of to_search_memory.
2664 This implements a basic search of memory, reading target memory and
2665 performing the search here (as opposed to performing the search in on the
2666 target side with, for example, gdbserver). */
2669 simple_search_memory (struct target_ops
*ops
,
2670 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2671 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2672 CORE_ADDR
*found_addrp
)
2674 /* NOTE: also defined in find.c testcase. */
2675 #define SEARCH_CHUNK_SIZE 16000
2676 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2677 /* Buffer to hold memory contents for searching. */
2678 gdb_byte
*search_buf
;
2679 unsigned search_buf_size
;
2680 struct cleanup
*old_cleanups
;
2682 search_buf_size
= chunk_size
+ pattern_len
- 1;
2684 /* No point in trying to allocate a buffer larger than the search space. */
2685 if (search_space_len
< search_buf_size
)
2686 search_buf_size
= search_space_len
;
2688 search_buf
= malloc (search_buf_size
);
2689 if (search_buf
== NULL
)
2690 error (_("Unable to allocate memory to perform the search."));
2691 old_cleanups
= make_cleanup (free_current_contents
, &search_buf
);
2693 /* Prime the search buffer. */
2695 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2696 search_buf
, start_addr
, search_buf_size
) != search_buf_size
)
2698 warning (_("Unable to access target memory at %s, halting search."),
2699 hex_string (start_addr
));
2700 do_cleanups (old_cleanups
);
2704 /* Perform the search.
2706 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2707 When we've scanned N bytes we copy the trailing bytes to the start and
2708 read in another N bytes. */
2710 while (search_space_len
>= pattern_len
)
2712 gdb_byte
*found_ptr
;
2713 unsigned nr_search_bytes
= min (search_space_len
, search_buf_size
);
2715 found_ptr
= memmem (search_buf
, nr_search_bytes
,
2716 pattern
, pattern_len
);
2718 if (found_ptr
!= NULL
)
2720 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
);
2722 *found_addrp
= found_addr
;
2723 do_cleanups (old_cleanups
);
2727 /* Not found in this chunk, skip to next chunk. */
2729 /* Don't let search_space_len wrap here, it's unsigned. */
2730 if (search_space_len
>= chunk_size
)
2731 search_space_len
-= chunk_size
;
2733 search_space_len
= 0;
2735 if (search_space_len
>= pattern_len
)
2737 unsigned keep_len
= search_buf_size
- chunk_size
;
2738 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2741 /* Copy the trailing part of the previous iteration to the front
2742 of the buffer for the next iteration. */
2743 gdb_assert (keep_len
== pattern_len
- 1);
2744 memcpy (search_buf
, search_buf
+ chunk_size
, keep_len
);
2746 nr_to_read
= min (search_space_len
- keep_len
, chunk_size
);
2748 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2749 search_buf
+ keep_len
, read_addr
,
2750 nr_to_read
) != nr_to_read
)
2752 warning (_("Unable to access target "
2753 "memory at %s, halting search."),
2754 hex_string (read_addr
));
2755 do_cleanups (old_cleanups
);
2759 start_addr
+= chunk_size
;
2765 do_cleanups (old_cleanups
);
2769 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2770 sequence of bytes in PATTERN with length PATTERN_LEN.
2772 The result is 1 if found, 0 if not found, and -1 if there was an error
2773 requiring halting of the search (e.g. memory read error).
2774 If the pattern is found the address is recorded in FOUND_ADDRP. */
2777 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2778 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2779 CORE_ADDR
*found_addrp
)
2781 struct target_ops
*t
;
2784 /* We don't use INHERIT to set current_target.to_search_memory,
2785 so we have to scan the target stack and handle targetdebug
2789 fprintf_unfiltered (gdb_stdlog
, "target_search_memory (%s, ...)\n",
2790 hex_string (start_addr
));
2792 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2793 if (t
->to_search_memory
!= NULL
)
2798 found
= t
->to_search_memory (t
, start_addr
, search_space_len
,
2799 pattern
, pattern_len
, found_addrp
);
2803 /* If a special version of to_search_memory isn't available, use the
2805 found
= simple_search_memory (current_target
.beneath
,
2806 start_addr
, search_space_len
,
2807 pattern
, pattern_len
, found_addrp
);
2811 fprintf_unfiltered (gdb_stdlog
, " = %d\n", found
);
2816 /* Look through the currently pushed targets. If none of them will
2817 be able to restart the currently running process, issue an error
2821 target_require_runnable (void)
2823 struct target_ops
*t
;
2825 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
2827 /* If this target knows how to create a new program, then
2828 assume we will still be able to after killing the current
2829 one. Either killing and mourning will not pop T, or else
2830 find_default_run_target will find it again. */
2831 if (t
->to_create_inferior
!= NULL
)
2834 /* Do not worry about thread_stratum targets that can not
2835 create inferiors. Assume they will be pushed again if
2836 necessary, and continue to the process_stratum. */
2837 if (t
->to_stratum
== thread_stratum
2838 || t
->to_stratum
== arch_stratum
)
2841 error (_("The \"%s\" target does not support \"run\". "
2842 "Try \"help target\" or \"continue\"."),
2846 /* This function is only called if the target is running. In that
2847 case there should have been a process_stratum target and it
2848 should either know how to create inferiors, or not... */
2849 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2852 /* Look through the list of possible targets for a target that can
2853 execute a run or attach command without any other data. This is
2854 used to locate the default process stratum.
2856 If DO_MESG is not NULL, the result is always valid (error() is
2857 called for errors); else, return NULL on error. */
2859 static struct target_ops
*
2860 find_default_run_target (char *do_mesg
)
2862 struct target_ops
**t
;
2863 struct target_ops
*runable
= NULL
;
2868 for (t
= target_structs
; t
< target_structs
+ target_struct_size
;
2871 if ((*t
)->to_can_run
&& target_can_run (*t
))
2881 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2890 find_default_attach (struct target_ops
*ops
, char *args
, int from_tty
)
2892 struct target_ops
*t
;
2894 t
= find_default_run_target ("attach");
2895 (t
->to_attach
) (t
, args
, from_tty
);
2900 find_default_create_inferior (struct target_ops
*ops
,
2901 char *exec_file
, char *allargs
, char **env
,
2904 struct target_ops
*t
;
2906 t
= find_default_run_target ("run");
2907 (t
->to_create_inferior
) (t
, exec_file
, allargs
, env
, from_tty
);
2912 find_default_can_async_p (void)
2914 struct target_ops
*t
;
2916 /* This may be called before the target is pushed on the stack;
2917 look for the default process stratum. If there's none, gdb isn't
2918 configured with a native debugger, and target remote isn't
2920 t
= find_default_run_target (NULL
);
2921 if (t
&& t
->to_can_async_p
)
2922 return (t
->to_can_async_p
) ();
2927 find_default_is_async_p (void)
2929 struct target_ops
*t
;
2931 /* This may be called before the target is pushed on the stack;
2932 look for the default process stratum. If there's none, gdb isn't
2933 configured with a native debugger, and target remote isn't
2935 t
= find_default_run_target (NULL
);
2936 if (t
&& t
->to_is_async_p
)
2937 return (t
->to_is_async_p
) ();
2942 find_default_supports_non_stop (void)
2944 struct target_ops
*t
;
2946 t
= find_default_run_target (NULL
);
2947 if (t
&& t
->to_supports_non_stop
)
2948 return (t
->to_supports_non_stop
) ();
2953 target_supports_non_stop (void)
2955 struct target_ops
*t
;
2957 for (t
= ¤t_target
; t
!= NULL
; t
= t
->beneath
)
2958 if (t
->to_supports_non_stop
)
2959 return t
->to_supports_non_stop ();
2966 target_get_osdata (const char *type
)
2968 struct target_ops
*t
;
2970 /* If we're already connected to something that can get us OS
2971 related data, use it. Otherwise, try using the native
2973 if (current_target
.to_stratum
>= process_stratum
)
2974 t
= current_target
.beneath
;
2976 t
= find_default_run_target ("get OS data");
2981 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2984 /* Determine the current address space of thread PTID. */
2986 struct address_space
*
2987 target_thread_address_space (ptid_t ptid
)
2989 struct address_space
*aspace
;
2990 struct inferior
*inf
;
2991 struct target_ops
*t
;
2993 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
2995 if (t
->to_thread_address_space
!= NULL
)
2997 aspace
= t
->to_thread_address_space (t
, ptid
);
2998 gdb_assert (aspace
);
3001 fprintf_unfiltered (gdb_stdlog
,
3002 "target_thread_address_space (%s) = %d\n",
3003 target_pid_to_str (ptid
),
3004 address_space_num (aspace
));
3009 /* Fall-back to the "main" address space of the inferior. */
3010 inf
= find_inferior_pid (ptid_get_pid (ptid
));
3012 if (inf
== NULL
|| inf
->aspace
== NULL
)
3013 internal_error (__FILE__
, __LINE__
,
3014 _("Can't determine the current "
3015 "address space of thread %s\n"),
3016 target_pid_to_str (ptid
));
3022 default_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3024 return (len
<= gdbarch_ptr_bit (target_gdbarch
) / TARGET_CHAR_BIT
);
3028 default_watchpoint_addr_within_range (struct target_ops
*target
,
3030 CORE_ADDR start
, int length
)
3032 return addr
>= start
&& addr
< start
+ length
;
3035 static struct gdbarch
*
3036 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3038 return target_gdbarch
;
3054 return_minus_one (void)
3059 /* Find a single runnable target in the stack and return it. If for
3060 some reason there is more than one, return NULL. */
3063 find_run_target (void)
3065 struct target_ops
**t
;
3066 struct target_ops
*runable
= NULL
;
3071 for (t
= target_structs
; t
< target_structs
+ target_struct_size
; ++t
)
3073 if ((*t
)->to_can_run
&& target_can_run (*t
))
3080 return (count
== 1 ? runable
: NULL
);
3084 * Find the next target down the stack from the specified target.
3088 find_target_beneath (struct target_ops
*t
)
3094 /* The inferior process has died. Long live the inferior! */
3097 generic_mourn_inferior (void)
3101 ptid
= inferior_ptid
;
3102 inferior_ptid
= null_ptid
;
3104 if (!ptid_equal (ptid
, null_ptid
))
3106 int pid
= ptid_get_pid (ptid
);
3107 exit_inferior (pid
);
3110 breakpoint_init_inferior (inf_exited
);
3111 registers_changed ();
3113 reopen_exec_file ();
3114 reinit_frame_cache ();
3116 if (deprecated_detach_hook
)
3117 deprecated_detach_hook ();
3120 /* Helper function for child_wait and the derivatives of child_wait.
3121 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3122 translation of that in OURSTATUS. */
3124 store_waitstatus (struct target_waitstatus
*ourstatus
, int hoststatus
)
3126 if (WIFEXITED (hoststatus
))
3128 ourstatus
->kind
= TARGET_WAITKIND_EXITED
;
3129 ourstatus
->value
.integer
= WEXITSTATUS (hoststatus
);
3131 else if (!WIFSTOPPED (hoststatus
))
3133 ourstatus
->kind
= TARGET_WAITKIND_SIGNALLED
;
3134 ourstatus
->value
.sig
= target_signal_from_host (WTERMSIG (hoststatus
));
3138 ourstatus
->kind
= TARGET_WAITKIND_STOPPED
;
3139 ourstatus
->value
.sig
= target_signal_from_host (WSTOPSIG (hoststatus
));
3143 /* Convert a normal process ID to a string. Returns the string in a
3147 normal_pid_to_str (ptid_t ptid
)
3149 static char buf
[32];
3151 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3156 dummy_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3158 return normal_pid_to_str (ptid
);
3161 /* Error-catcher for target_find_memory_regions. */
3163 dummy_find_memory_regions (find_memory_region_ftype ignore1
, void *ignore2
)
3165 error (_("Command not implemented for this target."));
3169 /* Error-catcher for target_make_corefile_notes. */
3171 dummy_make_corefile_notes (bfd
*ignore1
, int *ignore2
)
3173 error (_("Command not implemented for this target."));
3177 /* Error-catcher for target_get_bookmark. */
3179 dummy_get_bookmark (char *ignore1
, int ignore2
)
3185 /* Error-catcher for target_goto_bookmark. */
3187 dummy_goto_bookmark (gdb_byte
*ignore
, int from_tty
)
3192 /* Set up the handful of non-empty slots needed by the dummy target
3196 init_dummy_target (void)
3198 dummy_target
.to_shortname
= "None";
3199 dummy_target
.to_longname
= "None";
3200 dummy_target
.to_doc
= "";
3201 dummy_target
.to_attach
= find_default_attach
;
3202 dummy_target
.to_detach
=
3203 (void (*)(struct target_ops
*, char *, int))target_ignore
;
3204 dummy_target
.to_create_inferior
= find_default_create_inferior
;
3205 dummy_target
.to_can_async_p
= find_default_can_async_p
;
3206 dummy_target
.to_is_async_p
= find_default_is_async_p
;
3207 dummy_target
.to_supports_non_stop
= find_default_supports_non_stop
;
3208 dummy_target
.to_pid_to_str
= dummy_pid_to_str
;
3209 dummy_target
.to_stratum
= dummy_stratum
;
3210 dummy_target
.to_find_memory_regions
= dummy_find_memory_regions
;
3211 dummy_target
.to_make_corefile_notes
= dummy_make_corefile_notes
;
3212 dummy_target
.to_get_bookmark
= dummy_get_bookmark
;
3213 dummy_target
.to_goto_bookmark
= dummy_goto_bookmark
;
3214 dummy_target
.to_xfer_partial
= default_xfer_partial
;
3215 dummy_target
.to_has_all_memory
= (int (*) (struct target_ops
*)) return_zero
;
3216 dummy_target
.to_has_memory
= (int (*) (struct target_ops
*)) return_zero
;
3217 dummy_target
.to_has_stack
= (int (*) (struct target_ops
*)) return_zero
;
3218 dummy_target
.to_has_registers
= (int (*) (struct target_ops
*)) return_zero
;
3219 dummy_target
.to_has_execution
3220 = (int (*) (struct target_ops
*, ptid_t
)) return_zero
;
3221 dummy_target
.to_stopped_by_watchpoint
= return_zero
;
3222 dummy_target
.to_stopped_data_address
=
3223 (int (*) (struct target_ops
*, CORE_ADDR
*)) return_zero
;
3224 dummy_target
.to_magic
= OPS_MAGIC
;
3228 debug_to_open (char *args
, int from_tty
)
3230 debug_target
.to_open (args
, from_tty
);
3232 fprintf_unfiltered (gdb_stdlog
, "target_open (%s, %d)\n", args
, from_tty
);
3236 target_close (struct target_ops
*targ
, int quitting
)
3238 if (targ
->to_xclose
!= NULL
)
3239 targ
->to_xclose (targ
, quitting
);
3240 else if (targ
->to_close
!= NULL
)
3241 targ
->to_close (quitting
);
3244 fprintf_unfiltered (gdb_stdlog
, "target_close (%d)\n", quitting
);
3248 target_attach (char *args
, int from_tty
)
3250 struct target_ops
*t
;
3252 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3254 if (t
->to_attach
!= NULL
)
3256 t
->to_attach (t
, args
, from_tty
);
3258 fprintf_unfiltered (gdb_stdlog
, "target_attach (%s, %d)\n",
3264 internal_error (__FILE__
, __LINE__
,
3265 _("could not find a target to attach"));
3269 target_thread_alive (ptid_t ptid
)
3271 struct target_ops
*t
;
3273 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3275 if (t
->to_thread_alive
!= NULL
)
3279 retval
= t
->to_thread_alive (t
, ptid
);
3281 fprintf_unfiltered (gdb_stdlog
, "target_thread_alive (%d) = %d\n",
3282 PIDGET (ptid
), retval
);
3292 target_find_new_threads (void)
3294 struct target_ops
*t
;
3296 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3298 if (t
->to_find_new_threads
!= NULL
)
3300 t
->to_find_new_threads (t
);
3302 fprintf_unfiltered (gdb_stdlog
, "target_find_new_threads ()\n");
3310 target_stop (ptid_t ptid
)
3314 warning (_("May not interrupt or stop the target, ignoring attempt"));
3318 (*current_target
.to_stop
) (ptid
);
3322 debug_to_post_attach (int pid
)
3324 debug_target
.to_post_attach (pid
);
3326 fprintf_unfiltered (gdb_stdlog
, "target_post_attach (%d)\n", pid
);
3329 /* Return a pretty printed form of target_waitstatus.
3330 Space for the result is malloc'd, caller must free. */
3333 target_waitstatus_to_string (const struct target_waitstatus
*ws
)
3335 const char *kind_str
= "status->kind = ";
3339 case TARGET_WAITKIND_EXITED
:
3340 return xstrprintf ("%sexited, status = %d",
3341 kind_str
, ws
->value
.integer
);
3342 case TARGET_WAITKIND_STOPPED
:
3343 return xstrprintf ("%sstopped, signal = %s",
3344 kind_str
, target_signal_to_name (ws
->value
.sig
));
3345 case TARGET_WAITKIND_SIGNALLED
:
3346 return xstrprintf ("%ssignalled, signal = %s",
3347 kind_str
, target_signal_to_name (ws
->value
.sig
));
3348 case TARGET_WAITKIND_LOADED
:
3349 return xstrprintf ("%sloaded", kind_str
);
3350 case TARGET_WAITKIND_FORKED
:
3351 return xstrprintf ("%sforked", kind_str
);
3352 case TARGET_WAITKIND_VFORKED
:
3353 return xstrprintf ("%svforked", kind_str
);
3354 case TARGET_WAITKIND_EXECD
:
3355 return xstrprintf ("%sexecd", kind_str
);
3356 case TARGET_WAITKIND_SYSCALL_ENTRY
:
3357 return xstrprintf ("%sentered syscall", kind_str
);
3358 case TARGET_WAITKIND_SYSCALL_RETURN
:
3359 return xstrprintf ("%sexited syscall", kind_str
);
3360 case TARGET_WAITKIND_SPURIOUS
:
3361 return xstrprintf ("%sspurious", kind_str
);
3362 case TARGET_WAITKIND_IGNORE
:
3363 return xstrprintf ("%signore", kind_str
);
3364 case TARGET_WAITKIND_NO_HISTORY
:
3365 return xstrprintf ("%sno-history", kind_str
);
3367 return xstrprintf ("%sunknown???", kind_str
);
3372 debug_print_register (const char * func
,
3373 struct regcache
*regcache
, int regno
)
3375 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
3377 fprintf_unfiltered (gdb_stdlog
, "%s ", func
);
3378 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
)
3379 && gdbarch_register_name (gdbarch
, regno
) != NULL
3380 && gdbarch_register_name (gdbarch
, regno
)[0] != '\0')
3381 fprintf_unfiltered (gdb_stdlog
, "(%s)",
3382 gdbarch_register_name (gdbarch
, regno
));
3384 fprintf_unfiltered (gdb_stdlog
, "(%d)", regno
);
3385 if (regno
>= 0 && regno
< gdbarch_num_regs (gdbarch
))
3387 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3388 int i
, size
= register_size (gdbarch
, regno
);
3389 unsigned char buf
[MAX_REGISTER_SIZE
];
3391 regcache_raw_collect (regcache
, regno
, buf
);
3392 fprintf_unfiltered (gdb_stdlog
, " = ");
3393 for (i
= 0; i
< size
; i
++)
3395 fprintf_unfiltered (gdb_stdlog
, "%02x", buf
[i
]);
3397 if (size
<= sizeof (LONGEST
))
3399 ULONGEST val
= extract_unsigned_integer (buf
, size
, byte_order
);
3401 fprintf_unfiltered (gdb_stdlog
, " %s %s",
3402 core_addr_to_string_nz (val
), plongest (val
));
3405 fprintf_unfiltered (gdb_stdlog
, "\n");
3409 target_fetch_registers (struct regcache
*regcache
, int regno
)
3411 struct target_ops
*t
;
3413 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3415 if (t
->to_fetch_registers
!= NULL
)
3417 t
->to_fetch_registers (t
, regcache
, regno
);
3419 debug_print_register ("target_fetch_registers", regcache
, regno
);
3426 target_store_registers (struct regcache
*regcache
, int regno
)
3428 struct target_ops
*t
;
3430 if (!may_write_registers
)
3431 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3433 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3435 if (t
->to_store_registers
!= NULL
)
3437 t
->to_store_registers (t
, regcache
, regno
);
3440 debug_print_register ("target_store_registers", regcache
, regno
);
3450 target_core_of_thread (ptid_t ptid
)
3452 struct target_ops
*t
;
3454 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3456 if (t
->to_core_of_thread
!= NULL
)
3458 int retval
= t
->to_core_of_thread (t
, ptid
);
3461 fprintf_unfiltered (gdb_stdlog
,
3462 "target_core_of_thread (%d) = %d\n",
3463 PIDGET (ptid
), retval
);
3472 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3474 struct target_ops
*t
;
3476 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3478 if (t
->to_verify_memory
!= NULL
)
3480 int retval
= t
->to_verify_memory (t
, data
, memaddr
, size
);
3483 fprintf_unfiltered (gdb_stdlog
,
3484 "target_verify_memory (%s, %s) = %d\n",
3485 paddress (target_gdbarch
, memaddr
),
3495 /* The documentation for this function is in its prototype declaration
3499 target_ranged_break_num_registers (void)
3501 struct target_ops
*t
;
3503 for (t
= current_target
.beneath
; t
!= NULL
; t
= t
->beneath
)
3504 if (t
->to_ranged_break_num_registers
!= NULL
)
3505 return t
->to_ranged_break_num_registers (t
);
3511 debug_to_prepare_to_store (struct regcache
*regcache
)
3513 debug_target
.to_prepare_to_store (regcache
);
3515 fprintf_unfiltered (gdb_stdlog
, "target_prepare_to_store ()\n");
3519 deprecated_debug_xfer_memory (CORE_ADDR memaddr
, bfd_byte
*myaddr
, int len
,
3520 int write
, struct mem_attrib
*attrib
,
3521 struct target_ops
*target
)
3525 retval
= debug_target
.deprecated_xfer_memory (memaddr
, myaddr
, len
, write
,
3528 fprintf_unfiltered (gdb_stdlog
,
3529 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3530 paddress (target_gdbarch
, memaddr
), len
,
3531 write
? "write" : "read", retval
);
3537 fputs_unfiltered (", bytes =", gdb_stdlog
);
3538 for (i
= 0; i
< retval
; i
++)
3540 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
3542 if (targetdebug
< 2 && i
> 0)
3544 fprintf_unfiltered (gdb_stdlog
, " ...");
3547 fprintf_unfiltered (gdb_stdlog
, "\n");
3550 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
3554 fputc_unfiltered ('\n', gdb_stdlog
);
3560 debug_to_files_info (struct target_ops
*target
)
3562 debug_target
.to_files_info (target
);
3564 fprintf_unfiltered (gdb_stdlog
, "target_files_info (xxx)\n");
3568 debug_to_insert_breakpoint (struct gdbarch
*gdbarch
,
3569 struct bp_target_info
*bp_tgt
)
3573 retval
= debug_target
.to_insert_breakpoint (gdbarch
, bp_tgt
);
3575 fprintf_unfiltered (gdb_stdlog
,
3576 "target_insert_breakpoint (%s, xxx) = %ld\n",
3577 core_addr_to_string (bp_tgt
->placed_address
),
3578 (unsigned long) retval
);
3583 debug_to_remove_breakpoint (struct gdbarch
*gdbarch
,
3584 struct bp_target_info
*bp_tgt
)
3588 retval
= debug_target
.to_remove_breakpoint (gdbarch
, bp_tgt
);
3590 fprintf_unfiltered (gdb_stdlog
,
3591 "target_remove_breakpoint (%s, xxx) = %ld\n",
3592 core_addr_to_string (bp_tgt
->placed_address
),
3593 (unsigned long) retval
);
3598 debug_to_can_use_hw_breakpoint (int type
, int cnt
, int from_tty
)
3602 retval
= debug_target
.to_can_use_hw_breakpoint (type
, cnt
, from_tty
);
3604 fprintf_unfiltered (gdb_stdlog
,
3605 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3606 (unsigned long) type
,
3607 (unsigned long) cnt
,
3608 (unsigned long) from_tty
,
3609 (unsigned long) retval
);
3614 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
3618 retval
= debug_target
.to_region_ok_for_hw_watchpoint (addr
, len
);
3620 fprintf_unfiltered (gdb_stdlog
,
3621 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3622 core_addr_to_string (addr
), (unsigned long) len
,
3623 core_addr_to_string (retval
));
3628 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int rw
,
3629 struct expression
*cond
)
3633 retval
= debug_target
.to_can_accel_watchpoint_condition (addr
, len
,
3636 fprintf_unfiltered (gdb_stdlog
,
3637 "target_can_accel_watchpoint_condition "
3638 "(%s, %d, %d, %s) = %ld\n",
3639 core_addr_to_string (addr
), len
, rw
,
3640 host_address_to_string (cond
), (unsigned long) retval
);
3645 debug_to_stopped_by_watchpoint (void)
3649 retval
= debug_target
.to_stopped_by_watchpoint ();
3651 fprintf_unfiltered (gdb_stdlog
,
3652 "target_stopped_by_watchpoint () = %ld\n",
3653 (unsigned long) retval
);
3658 debug_to_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr
)
3662 retval
= debug_target
.to_stopped_data_address (target
, addr
);
3664 fprintf_unfiltered (gdb_stdlog
,
3665 "target_stopped_data_address ([%s]) = %ld\n",
3666 core_addr_to_string (*addr
),
3667 (unsigned long)retval
);
3672 debug_to_watchpoint_addr_within_range (struct target_ops
*target
,
3674 CORE_ADDR start
, int length
)
3678 retval
= debug_target
.to_watchpoint_addr_within_range (target
, addr
,
3681 fprintf_filtered (gdb_stdlog
,
3682 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3683 core_addr_to_string (addr
), core_addr_to_string (start
),
3689 debug_to_insert_hw_breakpoint (struct gdbarch
*gdbarch
,
3690 struct bp_target_info
*bp_tgt
)
3694 retval
= debug_target
.to_insert_hw_breakpoint (gdbarch
, bp_tgt
);
3696 fprintf_unfiltered (gdb_stdlog
,
3697 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3698 core_addr_to_string (bp_tgt
->placed_address
),
3699 (unsigned long) retval
);
3704 debug_to_remove_hw_breakpoint (struct gdbarch
*gdbarch
,
3705 struct bp_target_info
*bp_tgt
)
3709 retval
= debug_target
.to_remove_hw_breakpoint (gdbarch
, bp_tgt
);
3711 fprintf_unfiltered (gdb_stdlog
,
3712 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3713 core_addr_to_string (bp_tgt
->placed_address
),
3714 (unsigned long) retval
);
3719 debug_to_insert_watchpoint (CORE_ADDR addr
, int len
, int type
,
3720 struct expression
*cond
)
3724 retval
= debug_target
.to_insert_watchpoint (addr
, len
, type
, cond
);
3726 fprintf_unfiltered (gdb_stdlog
,
3727 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3728 core_addr_to_string (addr
), len
, type
,
3729 host_address_to_string (cond
), (unsigned long) retval
);
3734 debug_to_remove_watchpoint (CORE_ADDR addr
, int len
, int type
,
3735 struct expression
*cond
)
3739 retval
= debug_target
.to_remove_watchpoint (addr
, len
, type
, cond
);
3741 fprintf_unfiltered (gdb_stdlog
,
3742 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3743 core_addr_to_string (addr
), len
, type
,
3744 host_address_to_string (cond
), (unsigned long) retval
);
3749 debug_to_terminal_init (void)
3751 debug_target
.to_terminal_init ();
3753 fprintf_unfiltered (gdb_stdlog
, "target_terminal_init ()\n");
3757 debug_to_terminal_inferior (void)
3759 debug_target
.to_terminal_inferior ();
3761 fprintf_unfiltered (gdb_stdlog
, "target_terminal_inferior ()\n");
3765 debug_to_terminal_ours_for_output (void)
3767 debug_target
.to_terminal_ours_for_output ();
3769 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours_for_output ()\n");
3773 debug_to_terminal_ours (void)
3775 debug_target
.to_terminal_ours ();
3777 fprintf_unfiltered (gdb_stdlog
, "target_terminal_ours ()\n");
3781 debug_to_terminal_save_ours (void)
3783 debug_target
.to_terminal_save_ours ();
3785 fprintf_unfiltered (gdb_stdlog
, "target_terminal_save_ours ()\n");
3789 debug_to_terminal_info (char *arg
, int from_tty
)
3791 debug_target
.to_terminal_info (arg
, from_tty
);
3793 fprintf_unfiltered (gdb_stdlog
, "target_terminal_info (%s, %d)\n", arg
,
3798 debug_to_load (char *args
, int from_tty
)
3800 debug_target
.to_load (args
, from_tty
);
3802 fprintf_unfiltered (gdb_stdlog
, "target_load (%s, %d)\n", args
, from_tty
);
3806 debug_to_post_startup_inferior (ptid_t ptid
)
3808 debug_target
.to_post_startup_inferior (ptid
);
3810 fprintf_unfiltered (gdb_stdlog
, "target_post_startup_inferior (%d)\n",
3815 debug_to_insert_fork_catchpoint (int pid
)
3819 retval
= debug_target
.to_insert_fork_catchpoint (pid
);
3821 fprintf_unfiltered (gdb_stdlog
, "target_insert_fork_catchpoint (%d) = %d\n",
3828 debug_to_remove_fork_catchpoint (int pid
)
3832 retval
= debug_target
.to_remove_fork_catchpoint (pid
);
3834 fprintf_unfiltered (gdb_stdlog
, "target_remove_fork_catchpoint (%d) = %d\n",
3841 debug_to_insert_vfork_catchpoint (int pid
)
3845 retval
= debug_target
.to_insert_vfork_catchpoint (pid
);
3847 fprintf_unfiltered (gdb_stdlog
, "target_insert_vfork_catchpoint (%d) = %d\n",
3854 debug_to_remove_vfork_catchpoint (int pid
)
3858 retval
= debug_target
.to_remove_vfork_catchpoint (pid
);
3860 fprintf_unfiltered (gdb_stdlog
, "target_remove_vfork_catchpoint (%d) = %d\n",
3867 debug_to_insert_exec_catchpoint (int pid
)
3871 retval
= debug_target
.to_insert_exec_catchpoint (pid
);
3873 fprintf_unfiltered (gdb_stdlog
, "target_insert_exec_catchpoint (%d) = %d\n",
3880 debug_to_remove_exec_catchpoint (int pid
)
3884 retval
= debug_target
.to_remove_exec_catchpoint (pid
);
3886 fprintf_unfiltered (gdb_stdlog
, "target_remove_exec_catchpoint (%d) = %d\n",
3893 debug_to_has_exited (int pid
, int wait_status
, int *exit_status
)
3897 has_exited
= debug_target
.to_has_exited (pid
, wait_status
, exit_status
);
3899 fprintf_unfiltered (gdb_stdlog
, "target_has_exited (%d, %d, %d) = %d\n",
3900 pid
, wait_status
, *exit_status
, has_exited
);
3906 debug_to_can_run (void)
3910 retval
= debug_target
.to_can_run ();
3912 fprintf_unfiltered (gdb_stdlog
, "target_can_run () = %d\n", retval
);
3918 debug_to_notice_signals (ptid_t ptid
)
3920 debug_target
.to_notice_signals (ptid
);
3922 fprintf_unfiltered (gdb_stdlog
, "target_notice_signals (%d)\n",
3926 static struct gdbarch
*
3927 debug_to_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3929 struct gdbarch
*retval
;
3931 retval
= debug_target
.to_thread_architecture (ops
, ptid
);
3933 fprintf_unfiltered (gdb_stdlog
,
3934 "target_thread_architecture (%s) = %s [%s]\n",
3935 target_pid_to_str (ptid
),
3936 host_address_to_string (retval
),
3937 gdbarch_bfd_arch_info (retval
)->printable_name
);
3942 debug_to_stop (ptid_t ptid
)
3944 debug_target
.to_stop (ptid
);
3946 fprintf_unfiltered (gdb_stdlog
, "target_stop (%s)\n",
3947 target_pid_to_str (ptid
));
3951 debug_to_rcmd (char *command
,
3952 struct ui_file
*outbuf
)
3954 debug_target
.to_rcmd (command
, outbuf
);
3955 fprintf_unfiltered (gdb_stdlog
, "target_rcmd (%s, ...)\n", command
);
3959 debug_to_pid_to_exec_file (int pid
)
3963 exec_file
= debug_target
.to_pid_to_exec_file (pid
);
3965 fprintf_unfiltered (gdb_stdlog
, "target_pid_to_exec_file (%d) = %s\n",
3972 setup_target_debug (void)
3974 memcpy (&debug_target
, ¤t_target
, sizeof debug_target
);
3976 current_target
.to_open
= debug_to_open
;
3977 current_target
.to_post_attach
= debug_to_post_attach
;
3978 current_target
.to_prepare_to_store
= debug_to_prepare_to_store
;
3979 current_target
.deprecated_xfer_memory
= deprecated_debug_xfer_memory
;
3980 current_target
.to_files_info
= debug_to_files_info
;
3981 current_target
.to_insert_breakpoint
= debug_to_insert_breakpoint
;
3982 current_target
.to_remove_breakpoint
= debug_to_remove_breakpoint
;
3983 current_target
.to_can_use_hw_breakpoint
= debug_to_can_use_hw_breakpoint
;
3984 current_target
.to_insert_hw_breakpoint
= debug_to_insert_hw_breakpoint
;
3985 current_target
.to_remove_hw_breakpoint
= debug_to_remove_hw_breakpoint
;
3986 current_target
.to_insert_watchpoint
= debug_to_insert_watchpoint
;
3987 current_target
.to_remove_watchpoint
= debug_to_remove_watchpoint
;
3988 current_target
.to_stopped_by_watchpoint
= debug_to_stopped_by_watchpoint
;
3989 current_target
.to_stopped_data_address
= debug_to_stopped_data_address
;
3990 current_target
.to_watchpoint_addr_within_range
3991 = debug_to_watchpoint_addr_within_range
;
3992 current_target
.to_region_ok_for_hw_watchpoint
3993 = debug_to_region_ok_for_hw_watchpoint
;
3994 current_target
.to_can_accel_watchpoint_condition
3995 = debug_to_can_accel_watchpoint_condition
;
3996 current_target
.to_terminal_init
= debug_to_terminal_init
;
3997 current_target
.to_terminal_inferior
= debug_to_terminal_inferior
;
3998 current_target
.to_terminal_ours_for_output
3999 = debug_to_terminal_ours_for_output
;
4000 current_target
.to_terminal_ours
= debug_to_terminal_ours
;
4001 current_target
.to_terminal_save_ours
= debug_to_terminal_save_ours
;
4002 current_target
.to_terminal_info
= debug_to_terminal_info
;
4003 current_target
.to_load
= debug_to_load
;
4004 current_target
.to_post_startup_inferior
= debug_to_post_startup_inferior
;
4005 current_target
.to_insert_fork_catchpoint
= debug_to_insert_fork_catchpoint
;
4006 current_target
.to_remove_fork_catchpoint
= debug_to_remove_fork_catchpoint
;
4007 current_target
.to_insert_vfork_catchpoint
= debug_to_insert_vfork_catchpoint
;
4008 current_target
.to_remove_vfork_catchpoint
= debug_to_remove_vfork_catchpoint
;
4009 current_target
.to_insert_exec_catchpoint
= debug_to_insert_exec_catchpoint
;
4010 current_target
.to_remove_exec_catchpoint
= debug_to_remove_exec_catchpoint
;
4011 current_target
.to_has_exited
= debug_to_has_exited
;
4012 current_target
.to_can_run
= debug_to_can_run
;
4013 current_target
.to_notice_signals
= debug_to_notice_signals
;
4014 current_target
.to_stop
= debug_to_stop
;
4015 current_target
.to_rcmd
= debug_to_rcmd
;
4016 current_target
.to_pid_to_exec_file
= debug_to_pid_to_exec_file
;
4017 current_target
.to_thread_architecture
= debug_to_thread_architecture
;
4021 static char targ_desc
[] =
4022 "Names of targets and files being debugged.\nShows the entire \
4023 stack of targets currently in use (including the exec-file,\n\
4024 core-file, and process, if any), as well as the symbol file name.";
4027 do_monitor_command (char *cmd
,
4030 if ((current_target
.to_rcmd
4031 == (void (*) (char *, struct ui_file
*)) tcomplain
)
4032 || (current_target
.to_rcmd
== debug_to_rcmd
4033 && (debug_target
.to_rcmd
4034 == (void (*) (char *, struct ui_file
*)) tcomplain
)))
4035 error (_("\"monitor\" command not supported by this target."));
4036 target_rcmd (cmd
, gdb_stdtarg
);
4039 /* Print the name of each layers of our target stack. */
4042 maintenance_print_target_stack (char *cmd
, int from_tty
)
4044 struct target_ops
*t
;
4046 printf_filtered (_("The current target stack is:\n"));
4048 for (t
= target_stack
; t
!= NULL
; t
= t
->beneath
)
4050 printf_filtered (" - %s (%s)\n", t
->to_shortname
, t
->to_longname
);
4054 /* Controls if async mode is permitted. */
4055 int target_async_permitted
= 0;
4057 /* The set command writes to this variable. If the inferior is
4058 executing, linux_nat_async_permitted is *not* updated. */
4059 static int target_async_permitted_1
= 0;
4062 set_maintenance_target_async_permitted (char *args
, int from_tty
,
4063 struct cmd_list_element
*c
)
4065 if (have_live_inferiors ())
4067 target_async_permitted_1
= target_async_permitted
;
4068 error (_("Cannot change this setting while the inferior is running."));
4071 target_async_permitted
= target_async_permitted_1
;
4075 show_maintenance_target_async_permitted (struct ui_file
*file
, int from_tty
,
4076 struct cmd_list_element
*c
,
4079 fprintf_filtered (file
,
4080 _("Controlling the inferior in "
4081 "asynchronous mode is %s.\n"), value
);
4084 /* Temporary copies of permission settings. */
4086 static int may_write_registers_1
= 1;
4087 static int may_write_memory_1
= 1;
4088 static int may_insert_breakpoints_1
= 1;
4089 static int may_insert_tracepoints_1
= 1;
4090 static int may_insert_fast_tracepoints_1
= 1;
4091 static int may_stop_1
= 1;
4093 /* Make the user-set values match the real values again. */
4096 update_target_permissions (void)
4098 may_write_registers_1
= may_write_registers
;
4099 may_write_memory_1
= may_write_memory
;
4100 may_insert_breakpoints_1
= may_insert_breakpoints
;
4101 may_insert_tracepoints_1
= may_insert_tracepoints
;
4102 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4103 may_stop_1
= may_stop
;
4106 /* The one function handles (most of) the permission flags in the same
4110 set_target_permissions (char *args
, int from_tty
,
4111 struct cmd_list_element
*c
)
4113 if (target_has_execution
)
4115 update_target_permissions ();
4116 error (_("Cannot change this setting while the inferior is running."));
4119 /* Make the real values match the user-changed values. */
4120 may_write_registers
= may_write_registers_1
;
4121 may_insert_breakpoints
= may_insert_breakpoints_1
;
4122 may_insert_tracepoints
= may_insert_tracepoints_1
;
4123 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4124 may_stop
= may_stop_1
;
4125 update_observer_mode ();
4128 /* Set memory write permission independently of observer mode. */
4131 set_write_memory_permission (char *args
, int from_tty
,
4132 struct cmd_list_element
*c
)
4134 /* Make the real values match the user-changed values. */
4135 may_write_memory
= may_write_memory_1
;
4136 update_observer_mode ();
4141 initialize_targets (void)
4143 init_dummy_target ();
4144 push_target (&dummy_target
);
4146 add_info ("target", target_info
, targ_desc
);
4147 add_info ("files", target_info
, targ_desc
);
4149 add_setshow_zinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4150 Set target debugging."), _("\
4151 Show target debugging."), _("\
4152 When non-zero, target debugging is enabled. Higher numbers are more\n\
4153 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4157 &setdebuglist
, &showdebuglist
);
4159 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4160 &trust_readonly
, _("\
4161 Set mode for reading from readonly sections."), _("\
4162 Show mode for reading from readonly sections."), _("\
4163 When this mode is on, memory reads from readonly sections (such as .text)\n\
4164 will be read from the object file instead of from the target. This will\n\
4165 result in significant performance improvement for remote targets."),
4167 show_trust_readonly
,
4168 &setlist
, &showlist
);
4170 add_com ("monitor", class_obscure
, do_monitor_command
,
4171 _("Send a command to the remote monitor (remote targets only)."));
4173 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4174 _("Print the name of each layer of the internal target stack."),
4175 &maintenanceprintlist
);
4177 add_setshow_boolean_cmd ("target-async", no_class
,
4178 &target_async_permitted_1
, _("\
4179 Set whether gdb controls the inferior in asynchronous mode."), _("\
4180 Show whether gdb controls the inferior in asynchronous mode."), _("\
4181 Tells gdb whether to control the inferior in asynchronous mode."),
4182 set_maintenance_target_async_permitted
,
4183 show_maintenance_target_async_permitted
,
4187 add_setshow_boolean_cmd ("stack-cache", class_support
,
4188 &stack_cache_enabled_p_1
, _("\
4189 Set cache use for stack access."), _("\
4190 Show cache use for stack access."), _("\
4191 When on, use the data cache for all stack access, regardless of any\n\
4192 configured memory regions. This improves remote performance significantly.\n\
4193 By default, caching for stack access is on."),
4194 set_stack_cache_enabled_p
,
4195 show_stack_cache_enabled_p
,
4196 &setlist
, &showlist
);
4198 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4199 &may_write_registers_1
, _("\
4200 Set permission to write into registers."), _("\
4201 Show permission to write into registers."), _("\
4202 When this permission is on, GDB may write into the target's registers.\n\
4203 Otherwise, any sort of write attempt will result in an error."),
4204 set_target_permissions
, NULL
,
4205 &setlist
, &showlist
);
4207 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4208 &may_write_memory_1
, _("\
4209 Set permission to write into target memory."), _("\
4210 Show permission to write into target memory."), _("\
4211 When this permission is on, GDB may write into the target's memory.\n\
4212 Otherwise, any sort of write attempt will result in an error."),
4213 set_write_memory_permission
, NULL
,
4214 &setlist
, &showlist
);
4216 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4217 &may_insert_breakpoints_1
, _("\
4218 Set permission to insert breakpoints in the target."), _("\
4219 Show permission to insert breakpoints in the target."), _("\
4220 When this permission is on, GDB may insert breakpoints in the program.\n\
4221 Otherwise, any sort of insertion attempt will result in an error."),
4222 set_target_permissions
, NULL
,
4223 &setlist
, &showlist
);
4225 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4226 &may_insert_tracepoints_1
, _("\
4227 Set permission to insert tracepoints in the target."), _("\
4228 Show permission to insert tracepoints in the target."), _("\
4229 When this permission is on, GDB may insert tracepoints in the program.\n\
4230 Otherwise, any sort of insertion attempt will result in an error."),
4231 set_target_permissions
, NULL
,
4232 &setlist
, &showlist
);
4234 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4235 &may_insert_fast_tracepoints_1
, _("\
4236 Set permission to insert fast tracepoints in the target."), _("\
4237 Show permission to insert fast tracepoints in the target."), _("\
4238 When this permission is on, GDB may insert fast tracepoints.\n\
4239 Otherwise, any sort of insertion attempt will result in an error."),
4240 set_target_permissions
, NULL
,
4241 &setlist
, &showlist
);
4243 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4245 Set permission to interrupt or signal the target."), _("\
4246 Show permission to interrupt or signal the target."), _("\
4247 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4248 Otherwise, any attempt to interrupt or stop will be ignored."),
4249 set_target_permissions
, NULL
,
4250 &setlist
, &showlist
);
4253 target_dcache
= dcache_init ();