1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops *,
53 CORE_ADDR, CORE_ADDR, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
57 static int nosymbol (char *, CORE_ADDR *);
59 static void tcomplain (void) ATTRIBUTE_NORETURN;
61 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
63 static int return_zero (void);
65 static int return_one (void);
67 static int return_minus_one (void);
69 void target_ignore (void);
71 static void target_command (char *, int);
73 static struct target_ops *find_default_run_target (char *);
75 static LONGEST default_xfer_partial (struct target_ops *ops,
76 enum target_object object,
77 const char *annex, gdb_byte *readbuf,
78 const gdb_byte *writebuf,
79 ULONGEST offset, LONGEST len);
81 static LONGEST current_xfer_partial (struct target_ops *ops,
82 enum target_object object,
83 const char *annex, gdb_byte *readbuf,
84 const gdb_byte *writebuf,
85 ULONGEST offset, LONGEST len);
87 static LONGEST target_xfer_partial (struct target_ops *ops,
88 enum target_object object,
90 void *readbuf, const void *writebuf,
91 ULONGEST offset, LONGEST len);
93 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
96 static void init_dummy_target (void);
98 static struct target_ops debug_target;
100 static void debug_to_open (char *, int);
102 static void debug_to_prepare_to_store (struct regcache *);
104 static void debug_to_files_info (struct target_ops *);
106 static int debug_to_insert_breakpoint (struct gdbarch *,
107 struct bp_target_info *);
109 static int debug_to_remove_breakpoint (struct gdbarch *,
110 struct bp_target_info *);
112 static int debug_to_can_use_hw_breakpoint (int, int, int);
114 static int debug_to_insert_hw_breakpoint (struct gdbarch *,
115 struct bp_target_info *);
117 static int debug_to_remove_hw_breakpoint (struct gdbarch *,
118 struct bp_target_info *);
120 static int debug_to_insert_watchpoint (CORE_ADDR, int, int,
121 struct expression *);
123 static int debug_to_remove_watchpoint (CORE_ADDR, int, int,
124 struct expression *);
126 static int debug_to_stopped_by_watchpoint (void);
128 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
130 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
131 CORE_ADDR, CORE_ADDR, int);
133 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
135 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int,
136 struct expression *);
138 static void debug_to_terminal_init (void);
140 static void debug_to_terminal_inferior (void);
142 static void debug_to_terminal_ours_for_output (void);
144 static void debug_to_terminal_save_ours (void);
146 static void debug_to_terminal_ours (void);
148 static void debug_to_terminal_info (char *, int);
150 static void debug_to_load (char *, int);
152 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
154 static int debug_to_can_run (void);
156 static void debug_to_notice_signals (ptid_t);
158 static void debug_to_stop (ptid_t);
160 /* Pointer to array of target architecture structures; the size of the
161 array; the current index into the array; the allocated size of the
163 struct target_ops **target_structs;
164 unsigned target_struct_size;
165 unsigned target_struct_index;
166 unsigned target_struct_allocsize;
167 #define DEFAULT_ALLOCSIZE 10
169 /* The initial current target, so that there is always a semi-valid
172 static struct target_ops dummy_target;
174 /* Top of target stack. */
176 static struct target_ops *target_stack;
178 /* The target structure we are currently using to talk to a process
179 or file or whatever "inferior" we have. */
181 struct target_ops current_target;
183 /* Command list for target. */
185 static struct cmd_list_element *targetlist = NULL;
187 /* Nonzero if we should trust readonly sections from the
188 executable when reading memory. */
190 static int trust_readonly = 0;
192 /* Nonzero if we should show true memory content including
193 memory breakpoint inserted by gdb. */
195 static int show_memory_breakpoints = 0;
197 /* These globals control whether GDB attempts to perform these
198 operations; they are useful for targets that need to prevent
199 inadvertant disruption, such as in non-stop mode. */
201 int may_write_registers = 1;
203 int may_write_memory = 1;
205 int may_insert_breakpoints = 1;
207 int may_insert_tracepoints = 1;
209 int may_insert_fast_tracepoints = 1;
213 /* Non-zero if we want to see trace of target level stuff. */
215 static int targetdebug = 0;
217 show_targetdebug (struct ui_file *file, int from_tty,
218 struct cmd_list_element *c, const char *value)
220 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
223 static void setup_target_debug (void);
225 /* The option sets this. */
226 static int stack_cache_enabled_p_1 = 1;
227 /* And set_stack_cache_enabled_p updates this.
228 The reason for the separation is so that we don't flush the cache for
229 on->on transitions. */
230 static int stack_cache_enabled_p = 1;
232 /* This is called *after* the stack-cache has been set.
233 Flush the cache for off->on and on->off transitions.
234 There's no real need to flush the cache for on->off transitions,
235 except cleanliness. */
238 set_stack_cache_enabled_p (char *args, int from_tty,
239 struct cmd_list_element *c)
241 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
242 target_dcache_invalidate ();
244 stack_cache_enabled_p = stack_cache_enabled_p_1;
248 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
249 struct cmd_list_element *c, const char *value)
251 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
254 /* Cache of memory operations, to speed up remote access. */
255 static DCACHE *target_dcache;
257 /* Invalidate the target dcache. */
260 target_dcache_invalidate (void)
262 dcache_invalidate (target_dcache);
265 /* The user just typed 'target' without the name of a target. */
268 target_command (char *arg, int from_tty)
270 fputs_filtered ("Argument required (target name). Try `help target'\n",
274 /* Default target_has_* methods for process_stratum targets. */
277 default_child_has_all_memory (struct target_ops *ops)
279 /* If no inferior selected, then we can't read memory here. */
280 if (ptid_equal (inferior_ptid, null_ptid))
287 default_child_has_memory (struct target_ops *ops)
289 /* If no inferior selected, then we can't read memory here. */
290 if (ptid_equal (inferior_ptid, null_ptid))
297 default_child_has_stack (struct target_ops *ops)
299 /* If no inferior selected, there's no stack. */
300 if (ptid_equal (inferior_ptid, null_ptid))
307 default_child_has_registers (struct target_ops *ops)
309 /* Can't read registers from no inferior. */
310 if (ptid_equal (inferior_ptid, null_ptid))
317 default_child_has_execution (struct target_ops *ops)
319 /* If there's no thread selected, then we can't make it run through
321 if (ptid_equal (inferior_ptid, null_ptid))
329 target_has_all_memory_1 (void)
331 struct target_ops *t;
333 for (t = current_target.beneath; t != NULL; t = t->beneath)
334 if (t->to_has_all_memory (t))
341 target_has_memory_1 (void)
343 struct target_ops *t;
345 for (t = current_target.beneath; t != NULL; t = t->beneath)
346 if (t->to_has_memory (t))
353 target_has_stack_1 (void)
355 struct target_ops *t;
357 for (t = current_target.beneath; t != NULL; t = t->beneath)
358 if (t->to_has_stack (t))
365 target_has_registers_1 (void)
367 struct target_ops *t;
369 for (t = current_target.beneath; t != NULL; t = t->beneath)
370 if (t->to_has_registers (t))
377 target_has_execution_1 (void)
379 struct target_ops *t;
381 for (t = current_target.beneath; t != NULL; t = t->beneath)
382 if (t->to_has_execution (t))
388 /* Add a possible target architecture to the list. */
391 add_target (struct target_ops *t)
393 /* Provide default values for all "must have" methods. */
394 if (t->to_xfer_partial == NULL)
395 t->to_xfer_partial = default_xfer_partial;
397 if (t->to_has_all_memory == NULL)
398 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
400 if (t->to_has_memory == NULL)
401 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
403 if (t->to_has_stack == NULL)
404 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_registers == NULL)
407 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_execution == NULL)
410 t->to_has_execution = (int (*) (struct target_ops *)) return_zero;
414 target_struct_allocsize = DEFAULT_ALLOCSIZE;
415 target_structs = (struct target_ops **) xmalloc
416 (target_struct_allocsize * sizeof (*target_structs));
418 if (target_struct_size >= target_struct_allocsize)
420 target_struct_allocsize *= 2;
421 target_structs = (struct target_ops **)
422 xrealloc ((char *) target_structs,
423 target_struct_allocsize * sizeof (*target_structs));
425 target_structs[target_struct_size++] = t;
427 if (targetlist == NULL)
428 add_prefix_cmd ("target", class_run, target_command, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist, "target ", 0, &cmdlist);
435 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
448 struct target_ops *t;
450 for (t = current_target.beneath; t != NULL; t = t->beneath)
451 if (t->to_kill != NULL)
454 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
464 target_load (char *arg, int from_tty)
466 target_dcache_invalidate ();
467 (*current_target.to_load) (arg, from_tty);
471 target_create_inferior (char *exec_file, char *args,
472 char **env, int from_tty)
474 struct target_ops *t;
476 for (t = current_target.beneath; t != NULL; t = t->beneath)
478 if (t->to_create_inferior != NULL)
480 t->to_create_inferior (t, exec_file, args, env, from_tty);
482 fprintf_unfiltered (gdb_stdlog,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file, args, from_tty);
489 internal_error (__FILE__, __LINE__,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target.to_terminal_inferior) ();
509 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
510 struct target_ops *t)
512 errno = EIO; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target.to_shortname);
526 error (_("You can't do that without a process to debug."));
530 nosymbol (char *name, CORE_ADDR *addrp)
532 return 1; /* Symbol does not exist in target env. */
536 default_terminal_info (char *args, int from_tty)
538 printf_unfiltered (_("No saved terminal information.\n"));
541 /* A default implementation for the to_get_ada_task_ptid target method.
543 This function builds the PTID by using both LWP and TID as part of
544 the PTID lwp and tid elements. The pid used is the pid of the
548 default_get_ada_task_ptid (long lwp, long tid)
550 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
553 /* Go through the target stack from top to bottom, copying over zero
554 entries in current_target, then filling in still empty entries. In
555 effect, we are doing class inheritance through the pushed target
558 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
559 is currently implemented, is that it discards any knowledge of
560 which target an inherited method originally belonged to.
561 Consequently, new new target methods should instead explicitly and
562 locally search the target stack for the target that can handle the
566 update_current_target (void)
568 struct target_ops *t;
570 /* First, reset current's contents. */
571 memset (¤t_target, 0, sizeof (current_target));
573 #define INHERIT(FIELD, TARGET) \
574 if (!current_target.FIELD) \
575 current_target.FIELD = (TARGET)->FIELD
577 for (t = target_stack; t; t = t->beneath)
579 INHERIT (to_shortname, t);
580 INHERIT (to_longname, t);
582 /* Do not inherit to_open. */
583 /* Do not inherit to_close. */
584 /* Do not inherit to_attach. */
585 INHERIT (to_post_attach, t);
586 INHERIT (to_attach_no_wait, t);
587 /* Do not inherit to_detach. */
588 /* Do not inherit to_disconnect. */
589 /* Do not inherit to_resume. */
590 /* Do not inherit to_wait. */
591 /* Do not inherit to_fetch_registers. */
592 /* Do not inherit to_store_registers. */
593 INHERIT (to_prepare_to_store, t);
594 INHERIT (deprecated_xfer_memory, t);
595 INHERIT (to_files_info, t);
596 INHERIT (to_insert_breakpoint, t);
597 INHERIT (to_remove_breakpoint, t);
598 INHERIT (to_can_use_hw_breakpoint, t);
599 INHERIT (to_insert_hw_breakpoint, t);
600 INHERIT (to_remove_hw_breakpoint, t);
601 INHERIT (to_insert_watchpoint, t);
602 INHERIT (to_remove_watchpoint, t);
603 INHERIT (to_stopped_data_address, t);
604 INHERIT (to_have_steppable_watchpoint, t);
605 INHERIT (to_have_continuable_watchpoint, t);
606 INHERIT (to_stopped_by_watchpoint, t);
607 INHERIT (to_watchpoint_addr_within_range, t);
608 INHERIT (to_region_ok_for_hw_watchpoint, t);
609 INHERIT (to_can_accel_watchpoint_condition, t);
610 INHERIT (to_terminal_init, t);
611 INHERIT (to_terminal_inferior, t);
612 INHERIT (to_terminal_ours_for_output, t);
613 INHERIT (to_terminal_ours, t);
614 INHERIT (to_terminal_save_ours, t);
615 INHERIT (to_terminal_info, t);
616 /* Do not inherit to_kill. */
617 INHERIT (to_load, t);
618 INHERIT (to_lookup_symbol, t);
619 /* Do no inherit to_create_inferior. */
620 INHERIT (to_post_startup_inferior, t);
621 INHERIT (to_insert_fork_catchpoint, t);
622 INHERIT (to_remove_fork_catchpoint, t);
623 INHERIT (to_insert_vfork_catchpoint, t);
624 INHERIT (to_remove_vfork_catchpoint, t);
625 /* Do not inherit to_follow_fork. */
626 INHERIT (to_insert_exec_catchpoint, t);
627 INHERIT (to_remove_exec_catchpoint, t);
628 INHERIT (to_set_syscall_catchpoint, t);
629 INHERIT (to_has_exited, t);
630 /* Do not inherit to_mourn_inferior. */
631 INHERIT (to_can_run, t);
632 INHERIT (to_notice_signals, t);
633 /* Do not inherit to_thread_alive. */
634 /* Do not inherit to_find_new_threads. */
635 /* Do not inherit to_pid_to_str. */
636 INHERIT (to_extra_thread_info, t);
637 INHERIT (to_thread_name, t);
638 INHERIT (to_stop, t);
639 /* Do not inherit to_xfer_partial. */
640 INHERIT (to_rcmd, t);
641 INHERIT (to_pid_to_exec_file, t);
642 INHERIT (to_log_command, t);
643 INHERIT (to_stratum, t);
644 /* Do not inherit to_has_all_memory. */
645 /* Do not inherit to_has_memory. */
646 /* Do not inherit to_has_stack. */
647 /* Do not inherit to_has_registers. */
648 /* Do not inherit to_has_execution. */
649 INHERIT (to_has_thread_control, t);
650 INHERIT (to_can_async_p, t);
651 INHERIT (to_is_async_p, t);
652 INHERIT (to_async, t);
653 INHERIT (to_async_mask, t);
654 INHERIT (to_find_memory_regions, t);
655 INHERIT (to_make_corefile_notes, t);
656 INHERIT (to_get_bookmark, t);
657 INHERIT (to_goto_bookmark, t);
658 /* Do not inherit to_get_thread_local_address. */
659 INHERIT (to_can_execute_reverse, t);
660 INHERIT (to_thread_architecture, t);
661 /* Do not inherit to_read_description. */
662 INHERIT (to_get_ada_task_ptid, t);
663 /* Do not inherit to_search_memory. */
664 INHERIT (to_supports_multi_process, t);
665 INHERIT (to_trace_init, t);
666 INHERIT (to_download_tracepoint, t);
667 INHERIT (to_download_trace_state_variable, t);
668 INHERIT (to_trace_set_readonly_regions, t);
669 INHERIT (to_trace_start, t);
670 INHERIT (to_get_trace_status, t);
671 INHERIT (to_trace_stop, t);
672 INHERIT (to_trace_find, t);
673 INHERIT (to_get_trace_state_variable_value, t);
674 INHERIT (to_save_trace_data, t);
675 INHERIT (to_upload_tracepoints, t);
676 INHERIT (to_upload_trace_state_variables, t);
677 INHERIT (to_get_raw_trace_data, t);
678 INHERIT (to_set_disconnected_tracing, t);
679 INHERIT (to_set_circular_trace_buffer, t);
680 INHERIT (to_get_tib_address, t);
681 INHERIT (to_set_permissions, t);
682 INHERIT (to_static_tracepoint_marker_at, t);
683 INHERIT (to_static_tracepoint_markers_by_strid, t);
684 INHERIT (to_traceframe_info, t);
685 INHERIT (to_magic, t);
686 /* Do not inherit to_memory_map. */
687 /* Do not inherit to_flash_erase. */
688 /* Do not inherit to_flash_done. */
692 /* Clean up a target struct so it no longer has any zero pointers in
693 it. Some entries are defaulted to a method that print an error,
694 others are hard-wired to a standard recursive default. */
696 #define de_fault(field, value) \
697 if (!current_target.field) \
698 current_target.field = value
701 (void (*) (char *, int))
706 de_fault (to_post_attach,
709 de_fault (to_prepare_to_store,
710 (void (*) (struct regcache *))
712 de_fault (deprecated_xfer_memory,
713 (int (*) (CORE_ADDR, gdb_byte *, int, int,
714 struct mem_attrib *, struct target_ops *))
716 de_fault (to_files_info,
717 (void (*) (struct target_ops *))
719 de_fault (to_insert_breakpoint,
720 memory_insert_breakpoint);
721 de_fault (to_remove_breakpoint,
722 memory_remove_breakpoint);
723 de_fault (to_can_use_hw_breakpoint,
724 (int (*) (int, int, int))
726 de_fault (to_insert_hw_breakpoint,
727 (int (*) (struct gdbarch *, struct bp_target_info *))
729 de_fault (to_remove_hw_breakpoint,
730 (int (*) (struct gdbarch *, struct bp_target_info *))
732 de_fault (to_insert_watchpoint,
733 (int (*) (CORE_ADDR, int, int, struct expression *))
735 de_fault (to_remove_watchpoint,
736 (int (*) (CORE_ADDR, int, int, struct expression *))
738 de_fault (to_stopped_by_watchpoint,
741 de_fault (to_stopped_data_address,
742 (int (*) (struct target_ops *, CORE_ADDR *))
744 de_fault (to_watchpoint_addr_within_range,
745 default_watchpoint_addr_within_range);
746 de_fault (to_region_ok_for_hw_watchpoint,
747 default_region_ok_for_hw_watchpoint);
748 de_fault (to_can_accel_watchpoint_condition,
749 (int (*) (CORE_ADDR, int, int, struct expression *))
751 de_fault (to_terminal_init,
754 de_fault (to_terminal_inferior,
757 de_fault (to_terminal_ours_for_output,
760 de_fault (to_terminal_ours,
763 de_fault (to_terminal_save_ours,
766 de_fault (to_terminal_info,
767 default_terminal_info);
769 (void (*) (char *, int))
771 de_fault (to_lookup_symbol,
772 (int (*) (char *, CORE_ADDR *))
774 de_fault (to_post_startup_inferior,
777 de_fault (to_insert_fork_catchpoint,
780 de_fault (to_remove_fork_catchpoint,
783 de_fault (to_insert_vfork_catchpoint,
786 de_fault (to_remove_vfork_catchpoint,
789 de_fault (to_insert_exec_catchpoint,
792 de_fault (to_remove_exec_catchpoint,
795 de_fault (to_set_syscall_catchpoint,
796 (int (*) (int, int, int, int, int *))
798 de_fault (to_has_exited,
799 (int (*) (int, int, int *))
801 de_fault (to_can_run,
803 de_fault (to_notice_signals,
806 de_fault (to_extra_thread_info,
807 (char *(*) (struct thread_info *))
809 de_fault (to_thread_name,
810 (char *(*) (struct thread_info *))
815 current_target.to_xfer_partial = current_xfer_partial;
817 (void (*) (char *, struct ui_file *))
819 de_fault (to_pid_to_exec_file,
823 (void (*) (void (*) (enum inferior_event_type, void*), void*))
825 de_fault (to_async_mask,
828 de_fault (to_thread_architecture,
829 default_thread_architecture);
830 current_target.to_read_description = NULL;
831 de_fault (to_get_ada_task_ptid,
832 (ptid_t (*) (long, long))
833 default_get_ada_task_ptid);
834 de_fault (to_supports_multi_process,
837 de_fault (to_trace_init,
840 de_fault (to_download_tracepoint,
841 (void (*) (struct breakpoint *))
843 de_fault (to_download_trace_state_variable,
844 (void (*) (struct trace_state_variable *))
846 de_fault (to_trace_set_readonly_regions,
849 de_fault (to_trace_start,
852 de_fault (to_get_trace_status,
853 (int (*) (struct trace_status *))
855 de_fault (to_trace_stop,
858 de_fault (to_trace_find,
859 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
861 de_fault (to_get_trace_state_variable_value,
862 (int (*) (int, LONGEST *))
864 de_fault (to_save_trace_data,
865 (int (*) (const char *))
867 de_fault (to_upload_tracepoints,
868 (int (*) (struct uploaded_tp **))
870 de_fault (to_upload_trace_state_variables,
871 (int (*) (struct uploaded_tsv **))
873 de_fault (to_get_raw_trace_data,
874 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
876 de_fault (to_set_disconnected_tracing,
879 de_fault (to_set_circular_trace_buffer,
882 de_fault (to_get_tib_address,
883 (int (*) (ptid_t, CORE_ADDR *))
885 de_fault (to_set_permissions,
888 de_fault (to_static_tracepoint_marker_at,
889 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
891 de_fault (to_static_tracepoint_markers_by_strid,
892 (VEC(static_tracepoint_marker_p) * (*) (const char *))
894 de_fault (to_traceframe_info,
895 (struct traceframe_info * (*) (void))
899 /* Finally, position the target-stack beneath the squashed
900 "current_target". That way code looking for a non-inherited
901 target method can quickly and simply find it. */
902 current_target.beneath = target_stack;
905 setup_target_debug ();
908 /* Push a new target type into the stack of the existing target accessors,
909 possibly superseding some of the existing accessors.
911 Rather than allow an empty stack, we always have the dummy target at
912 the bottom stratum, so we can call the function vectors without
916 push_target (struct target_ops *t)
918 struct target_ops **cur;
920 /* Check magic number. If wrong, it probably means someone changed
921 the struct definition, but not all the places that initialize one. */
922 if (t->to_magic != OPS_MAGIC)
924 fprintf_unfiltered (gdb_stderr,
925 "Magic number of %s target struct wrong\n",
927 internal_error (__FILE__, __LINE__,
928 _("failed internal consistency check"));
931 /* Find the proper stratum to install this target in. */
932 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
934 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
938 /* If there's already targets at this stratum, remove them. */
939 /* FIXME: cagney/2003-10-15: I think this should be popping all
940 targets to CUR, and not just those at this stratum level. */
941 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
943 /* There's already something at this stratum level. Close it,
944 and un-hook it from the stack. */
945 struct target_ops *tmp = (*cur);
947 (*cur) = (*cur)->beneath;
949 target_close (tmp, 0);
952 /* We have removed all targets in our stratum, now add the new one. */
956 update_current_target ();
959 /* Remove a target_ops vector from the stack, wherever it may be.
960 Return how many times it was removed (0 or 1). */
963 unpush_target (struct target_ops *t)
965 struct target_ops **cur;
966 struct target_ops *tmp;
968 if (t->to_stratum == dummy_stratum)
969 internal_error (__FILE__, __LINE__,
970 _("Attempt to unpush the dummy target"));
972 /* Look for the specified target. Note that we assume that a target
973 can only occur once in the target stack. */
975 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
982 return 0; /* Didn't find target_ops, quit now. */
984 /* NOTE: cagney/2003-12-06: In '94 the close call was made
985 unconditional by moving it to before the above check that the
986 target was in the target stack (something about "Change the way
987 pushing and popping of targets work to support target overlays
988 and inheritance"). This doesn't make much sense - only open
989 targets should be closed. */
992 /* Unchain the target. */
994 (*cur) = (*cur)->beneath;
997 update_current_target ();
1005 target_close (target_stack, 0); /* Let it clean up. */
1006 if (unpush_target (target_stack) == 1)
1009 fprintf_unfiltered (gdb_stderr,
1010 "pop_target couldn't find target %s\n",
1011 current_target.to_shortname);
1012 internal_error (__FILE__, __LINE__,
1013 _("failed internal consistency check"));
1017 pop_all_targets_above (enum strata above_stratum, int quitting)
1019 while ((int) (current_target.to_stratum) > (int) above_stratum)
1021 target_close (target_stack, quitting);
1022 if (!unpush_target (target_stack))
1024 fprintf_unfiltered (gdb_stderr,
1025 "pop_all_targets couldn't find target %s\n",
1026 target_stack->to_shortname);
1027 internal_error (__FILE__, __LINE__,
1028 _("failed internal consistency check"));
1035 pop_all_targets (int quitting)
1037 pop_all_targets_above (dummy_stratum, quitting);
1040 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1043 target_is_pushed (struct target_ops *t)
1045 struct target_ops **cur;
1047 /* Check magic number. If wrong, it probably means someone changed
1048 the struct definition, but not all the places that initialize one. */
1049 if (t->to_magic != OPS_MAGIC)
1051 fprintf_unfiltered (gdb_stderr,
1052 "Magic number of %s target struct wrong\n",
1054 internal_error (__FILE__, __LINE__,
1055 _("failed internal consistency check"));
1058 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1065 /* Using the objfile specified in OBJFILE, find the address for the
1066 current thread's thread-local storage with offset OFFSET. */
1068 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1070 volatile CORE_ADDR addr = 0;
1071 struct target_ops *target;
1073 for (target = current_target.beneath;
1075 target = target->beneath)
1077 if (target->to_get_thread_local_address != NULL)
1082 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1084 ptid_t ptid = inferior_ptid;
1085 volatile struct gdb_exception ex;
1087 TRY_CATCH (ex, RETURN_MASK_ALL)
1091 /* Fetch the load module address for this objfile. */
1092 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1094 /* If it's 0, throw the appropriate exception. */
1096 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1097 _("TLS load module not found"));
1099 addr = target->to_get_thread_local_address (target, ptid,
1102 /* If an error occurred, print TLS related messages here. Otherwise,
1103 throw the error to some higher catcher. */
1106 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1110 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1111 error (_("Cannot find thread-local variables "
1112 "in this thread library."));
1114 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1115 if (objfile_is_library)
1116 error (_("Cannot find shared library `%s' in dynamic"
1117 " linker's load module list"), objfile->name);
1119 error (_("Cannot find executable file `%s' in dynamic"
1120 " linker's load module list"), objfile->name);
1122 case TLS_NOT_ALLOCATED_YET_ERROR:
1123 if (objfile_is_library)
1124 error (_("The inferior has not yet allocated storage for"
1125 " thread-local variables in\n"
1126 "the shared library `%s'\n"
1128 objfile->name, target_pid_to_str (ptid));
1130 error (_("The inferior has not yet allocated storage for"
1131 " thread-local variables in\n"
1132 "the executable `%s'\n"
1134 objfile->name, target_pid_to_str (ptid));
1136 case TLS_GENERIC_ERROR:
1137 if (objfile_is_library)
1138 error (_("Cannot find thread-local storage for %s, "
1139 "shared library %s:\n%s"),
1140 target_pid_to_str (ptid),
1141 objfile->name, ex.message);
1143 error (_("Cannot find thread-local storage for %s, "
1144 "executable file %s:\n%s"),
1145 target_pid_to_str (ptid),
1146 objfile->name, ex.message);
1149 throw_exception (ex);
1154 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1155 TLS is an ABI-specific thing. But we don't do that yet. */
1157 error (_("Cannot find thread-local variables on this target"));
1163 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1165 /* target_read_string -- read a null terminated string, up to LEN bytes,
1166 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1167 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1168 is responsible for freeing it. Return the number of bytes successfully
1172 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1174 int tlen, origlen, offset, i;
1178 int buffer_allocated;
1180 unsigned int nbytes_read = 0;
1182 gdb_assert (string);
1184 /* Small for testing. */
1185 buffer_allocated = 4;
1186 buffer = xmalloc (buffer_allocated);
1193 tlen = MIN (len, 4 - (memaddr & 3));
1194 offset = memaddr & 3;
1196 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1199 /* The transfer request might have crossed the boundary to an
1200 unallocated region of memory. Retry the transfer, requesting
1204 errcode = target_read_memory (memaddr, buf, 1);
1209 if (bufptr - buffer + tlen > buffer_allocated)
1213 bytes = bufptr - buffer;
1214 buffer_allocated *= 2;
1215 buffer = xrealloc (buffer, buffer_allocated);
1216 bufptr = buffer + bytes;
1219 for (i = 0; i < tlen; i++)
1221 *bufptr++ = buf[i + offset];
1222 if (buf[i + offset] == '\000')
1224 nbytes_read += i + 1;
1231 nbytes_read += tlen;
1240 struct target_section_table *
1241 target_get_section_table (struct target_ops *target)
1243 struct target_ops *t;
1246 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1248 for (t = target; t != NULL; t = t->beneath)
1249 if (t->to_get_section_table != NULL)
1250 return (*t->to_get_section_table) (t);
1255 /* Find a section containing ADDR. */
1257 struct target_section *
1258 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1260 struct target_section_table *table = target_get_section_table (target);
1261 struct target_section *secp;
1266 for (secp = table->sections; secp < table->sections_end; secp++)
1268 if (addr >= secp->addr && addr < secp->endaddr)
1274 /* Perform a partial memory transfer.
1275 For docs see target.h, to_xfer_partial. */
1278 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1279 void *readbuf, const void *writebuf, ULONGEST memaddr,
1284 struct mem_region *region;
1285 struct inferior *inf;
1287 /* Zero length requests are ok and require no work. */
1291 /* For accesses to unmapped overlay sections, read directly from
1292 files. Must do this first, as MEMADDR may need adjustment. */
1293 if (readbuf != NULL && overlay_debugging)
1295 struct obj_section *section = find_pc_overlay (memaddr);
1297 if (pc_in_unmapped_range (memaddr, section))
1299 struct target_section_table *table
1300 = target_get_section_table (ops);
1301 const char *section_name = section->the_bfd_section->name;
1303 memaddr = overlay_mapped_address (memaddr, section);
1304 return section_table_xfer_memory_partial (readbuf, writebuf,
1307 table->sections_end,
1312 /* Try the executable files, if "trust-readonly-sections" is set. */
1313 if (readbuf != NULL && trust_readonly)
1315 struct target_section *secp;
1316 struct target_section_table *table;
1318 secp = target_section_by_addr (ops, memaddr);
1320 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1323 table = target_get_section_table (ops);
1324 return section_table_xfer_memory_partial (readbuf, writebuf,
1327 table->sections_end,
1332 /* Try GDB's internal data cache. */
1333 region = lookup_mem_region (memaddr);
1334 /* region->hi == 0 means there's no upper bound. */
1335 if (memaddr + len < region->hi || region->hi == 0)
1338 reg_len = region->hi - memaddr;
1340 switch (region->attrib.mode)
1343 if (writebuf != NULL)
1348 if (readbuf != NULL)
1353 /* We only support writing to flash during "load" for now. */
1354 if (writebuf != NULL)
1355 error (_("Writing to flash memory forbidden in this context"));
1362 if (!ptid_equal (inferior_ptid, null_ptid))
1363 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1368 /* The dcache reads whole cache lines; that doesn't play well
1369 with reading from a trace buffer, because reading outside of
1370 the collected memory range fails. */
1371 && get_traceframe_number () == -1
1372 && (region->attrib.cache
1373 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1375 if (readbuf != NULL)
1376 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1379 /* FIXME drow/2006-08-09: If we're going to preserve const
1380 correctness dcache_xfer_memory should take readbuf and
1382 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1389 if (readbuf && !show_memory_breakpoints)
1390 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1395 /* If none of those methods found the memory we wanted, fall back
1396 to a target partial transfer. Normally a single call to
1397 to_xfer_partial is enough; if it doesn't recognize an object
1398 it will call the to_xfer_partial of the next target down.
1399 But for memory this won't do. Memory is the only target
1400 object which can be read from more than one valid target.
1401 A core file, for instance, could have some of memory but
1402 delegate other bits to the target below it. So, we must
1403 manually try all targets. */
1407 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1408 readbuf, writebuf, memaddr, reg_len);
1412 /* We want to continue past core files to executables, but not
1413 past a running target's memory. */
1414 if (ops->to_has_all_memory (ops))
1419 while (ops != NULL);
1421 if (res > 0 && readbuf != NULL && !show_memory_breakpoints)
1422 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1424 /* Make sure the cache gets updated no matter what - if we are writing
1425 to the stack. Even if this write is not tagged as such, we still need
1426 to update the cache. */
1431 && !region->attrib.cache
1432 && stack_cache_enabled_p
1433 && object != TARGET_OBJECT_STACK_MEMORY)
1435 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1438 /* If we still haven't got anything, return the last error. We
1444 restore_show_memory_breakpoints (void *arg)
1446 show_memory_breakpoints = (uintptr_t) arg;
1450 make_show_memory_breakpoints_cleanup (int show)
1452 int current = show_memory_breakpoints;
1454 show_memory_breakpoints = show;
1455 return make_cleanup (restore_show_memory_breakpoints,
1456 (void *) (uintptr_t) current);
1459 /* For docs see target.h, to_xfer_partial. */
1462 target_xfer_partial (struct target_ops *ops,
1463 enum target_object object, const char *annex,
1464 void *readbuf, const void *writebuf,
1465 ULONGEST offset, LONGEST len)
1469 gdb_assert (ops->to_xfer_partial != NULL);
1471 if (writebuf && !may_write_memory)
1472 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1473 core_addr_to_string_nz (offset), plongest (len));
1475 /* If this is a memory transfer, let the memory-specific code
1476 have a look at it instead. Memory transfers are more
1478 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1479 retval = memory_xfer_partial (ops, object, readbuf,
1480 writebuf, offset, len);
1483 enum target_object raw_object = object;
1485 /* If this is a raw memory transfer, request the normal
1486 memory object from other layers. */
1487 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1488 raw_object = TARGET_OBJECT_MEMORY;
1490 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1491 writebuf, offset, len);
1496 const unsigned char *myaddr = NULL;
1498 fprintf_unfiltered (gdb_stdlog,
1499 "%s:target_xfer_partial "
1500 "(%d, %s, %s, %s, %s, %s) = %s",
1503 (annex ? annex : "(null)"),
1504 host_address_to_string (readbuf),
1505 host_address_to_string (writebuf),
1506 core_addr_to_string_nz (offset),
1507 plongest (len), plongest (retval));
1513 if (retval > 0 && myaddr != NULL)
1517 fputs_unfiltered (", bytes =", gdb_stdlog);
1518 for (i = 0; i < retval; i++)
1520 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1522 if (targetdebug < 2 && i > 0)
1524 fprintf_unfiltered (gdb_stdlog, " ...");
1527 fprintf_unfiltered (gdb_stdlog, "\n");
1530 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1534 fputc_unfiltered ('\n', gdb_stdlog);
1539 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1540 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1541 if any error occurs.
1543 If an error occurs, no guarantee is made about the contents of the data at
1544 MYADDR. In particular, the caller should not depend upon partial reads
1545 filling the buffer with good data. There is no way for the caller to know
1546 how much good data might have been transfered anyway. Callers that can
1547 deal with partial reads should call target_read (which will retry until
1548 it makes no progress, and then return how much was transferred). */
1551 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1553 /* Dispatch to the topmost target, not the flattened current_target.
1554 Memory accesses check target->to_has_(all_)memory, and the
1555 flattened target doesn't inherit those. */
1556 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1557 myaddr, memaddr, len) == len)
1563 /* Like target_read_memory, but specify explicitly that this is a read from
1564 the target's stack. This may trigger different cache behavior. */
1567 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1569 /* Dispatch to the topmost target, not the flattened current_target.
1570 Memory accesses check target->to_has_(all_)memory, and the
1571 flattened target doesn't inherit those. */
1573 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1574 myaddr, memaddr, len) == len)
1580 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1581 Returns either 0 for success or an errno value if any error occurs.
1582 If an error occurs, no guarantee is made about how much data got written.
1583 Callers that can deal with partial writes should call target_write. */
1586 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1588 /* Dispatch to the topmost target, not the flattened current_target.
1589 Memory accesses check target->to_has_(all_)memory, and the
1590 flattened target doesn't inherit those. */
1591 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1592 myaddr, memaddr, len) == len)
1598 /* Fetch the target's memory map. */
1601 target_memory_map (void)
1603 VEC(mem_region_s) *result;
1604 struct mem_region *last_one, *this_one;
1606 struct target_ops *t;
1609 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1611 for (t = current_target.beneath; t != NULL; t = t->beneath)
1612 if (t->to_memory_map != NULL)
1618 result = t->to_memory_map (t);
1622 qsort (VEC_address (mem_region_s, result),
1623 VEC_length (mem_region_s, result),
1624 sizeof (struct mem_region), mem_region_cmp);
1626 /* Check that regions do not overlap. Simultaneously assign
1627 a numbering for the "mem" commands to use to refer to
1630 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1632 this_one->number = ix;
1634 if (last_one && last_one->hi > this_one->lo)
1636 warning (_("Overlapping regions in memory map: ignoring"));
1637 VEC_free (mem_region_s, result);
1640 last_one = this_one;
1647 target_flash_erase (ULONGEST address, LONGEST length)
1649 struct target_ops *t;
1651 for (t = current_target.beneath; t != NULL; t = t->beneath)
1652 if (t->to_flash_erase != NULL)
1655 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1656 hex_string (address), phex (length, 0));
1657 t->to_flash_erase (t, address, length);
1665 target_flash_done (void)
1667 struct target_ops *t;
1669 for (t = current_target.beneath; t != NULL; t = t->beneath)
1670 if (t->to_flash_done != NULL)
1673 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1674 t->to_flash_done (t);
1682 show_trust_readonly (struct ui_file *file, int from_tty,
1683 struct cmd_list_element *c, const char *value)
1685 fprintf_filtered (file,
1686 _("Mode for reading from readonly sections is %s.\n"),
1690 /* More generic transfers. */
1693 default_xfer_partial (struct target_ops *ops, enum target_object object,
1694 const char *annex, gdb_byte *readbuf,
1695 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1697 if (object == TARGET_OBJECT_MEMORY
1698 && ops->deprecated_xfer_memory != NULL)
1699 /* If available, fall back to the target's
1700 "deprecated_xfer_memory" method. */
1705 if (writebuf != NULL)
1707 void *buffer = xmalloc (len);
1708 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1710 memcpy (buffer, writebuf, len);
1711 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1712 1/*write*/, NULL, ops);
1713 do_cleanups (cleanup);
1715 if (readbuf != NULL)
1716 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1717 0/*read*/, NULL, ops);
1720 else if (xfered == 0 && errno == 0)
1721 /* "deprecated_xfer_memory" uses 0, cross checked against
1722 ERRNO as one indication of an error. */
1727 else if (ops->beneath != NULL)
1728 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1729 readbuf, writebuf, offset, len);
1734 /* The xfer_partial handler for the topmost target. Unlike the default,
1735 it does not need to handle memory specially; it just passes all
1736 requests down the stack. */
1739 current_xfer_partial (struct target_ops *ops, enum target_object object,
1740 const char *annex, gdb_byte *readbuf,
1741 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1743 if (ops->beneath != NULL)
1744 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1745 readbuf, writebuf, offset, len);
1750 /* Target vector read/write partial wrapper functions. */
1753 target_read_partial (struct target_ops *ops,
1754 enum target_object object,
1755 const char *annex, gdb_byte *buf,
1756 ULONGEST offset, LONGEST len)
1758 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1762 target_write_partial (struct target_ops *ops,
1763 enum target_object object,
1764 const char *annex, const gdb_byte *buf,
1765 ULONGEST offset, LONGEST len)
1767 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1770 /* Wrappers to perform the full transfer. */
1772 /* For docs on target_read see target.h. */
1775 target_read (struct target_ops *ops,
1776 enum target_object object,
1777 const char *annex, gdb_byte *buf,
1778 ULONGEST offset, LONGEST len)
1782 while (xfered < len)
1784 LONGEST xfer = target_read_partial (ops, object, annex,
1785 (gdb_byte *) buf + xfered,
1786 offset + xfered, len - xfered);
1788 /* Call an observer, notifying them of the xfer progress? */
1799 /** Assuming that the entire [begin, end) range of memory cannot be read,
1800 try to read whatever subrange is possible to read.
1802 The function results, in RESULT, either zero or one memory block.
1803 If there's a readable subrange at the beginning, it is completely
1804 read and returned. Any further readable subrange will not be read.
1805 Otherwise, if there's a readable subrange at the end, it will be
1806 completely read and returned. Any readable subranges before it (obviously,
1807 not starting at the beginning), will be ignored. In other cases --
1808 either no readable subrange, or readable subrange (s) that is neither
1809 at the beginning, or end, nothing is returned.
1811 The purpose of this function is to handle a read across a boundary of
1812 accessible memory in a case when memory map is not available. The above
1813 restrictions are fine for this case, but will give incorrect results if
1814 the memory is 'patchy'. However, supporting 'patchy' memory would require
1815 trying to read every single byte, and it seems unacceptable solution.
1816 Explicit memory map is recommended for this case -- and
1817 target_read_memory_robust will take care of reading multiple ranges
1821 read_whatever_is_readable (struct target_ops *ops,
1822 ULONGEST begin, ULONGEST end,
1823 VEC(memory_read_result_s) **result)
1825 gdb_byte *buf = xmalloc (end-begin);
1826 ULONGEST current_begin = begin;
1827 ULONGEST current_end = end;
1829 memory_read_result_s r;
1831 /* If we previously failed to read 1 byte, nothing can be done here. */
1832 if (end - begin <= 1)
1835 /* Check that either first or the last byte is readable, and give up
1836 if not. This heuristic is meant to permit reading accessible memory
1837 at the boundary of accessible region. */
1838 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1839 buf, begin, 1) == 1)
1844 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1845 buf + (end-begin) - 1, end - 1, 1) == 1)
1855 /* Loop invariant is that the [current_begin, current_end) was previously
1856 found to be not readable as a whole.
1858 Note loop condition -- if the range has 1 byte, we can't divide the range
1859 so there's no point trying further. */
1860 while (current_end - current_begin > 1)
1862 ULONGEST first_half_begin, first_half_end;
1863 ULONGEST second_half_begin, second_half_end;
1866 ULONGEST middle = current_begin + (current_end - current_begin)/2;
1869 first_half_begin = current_begin;
1870 first_half_end = middle;
1871 second_half_begin = middle;
1872 second_half_end = current_end;
1876 first_half_begin = middle;
1877 first_half_end = current_end;
1878 second_half_begin = current_begin;
1879 second_half_end = middle;
1882 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1883 buf + (first_half_begin - begin),
1885 first_half_end - first_half_begin);
1887 if (xfer == first_half_end - first_half_begin)
1889 /* This half reads up fine. So, the error must be in the
1891 current_begin = second_half_begin;
1892 current_end = second_half_end;
1896 /* This half is not readable. Because we've tried one byte, we
1897 know some part of this half if actually redable. Go to the next
1898 iteration to divide again and try to read.
1900 We don't handle the other half, because this function only tries
1901 to read a single readable subrange. */
1902 current_begin = first_half_begin;
1903 current_end = first_half_end;
1909 /* The [begin, current_begin) range has been read. */
1911 r.end = current_begin;
1916 /* The [current_end, end) range has been read. */
1917 LONGEST rlen = end - current_end;
1918 r.data = xmalloc (rlen);
1919 memcpy (r.data, buf + current_end - begin, rlen);
1920 r.begin = current_end;
1924 VEC_safe_push(memory_read_result_s, (*result), &r);
1928 free_memory_read_result_vector (void *x)
1930 VEC(memory_read_result_s) *v = x;
1931 memory_read_result_s *current;
1934 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
1936 xfree (current->data);
1938 VEC_free (memory_read_result_s, v);
1941 VEC(memory_read_result_s) *
1942 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
1944 VEC(memory_read_result_s) *result = 0;
1947 while (xfered < len)
1949 struct mem_region *region = lookup_mem_region (offset + xfered);
1952 /* If there is no explicit region, a fake one should be created. */
1953 gdb_assert (region);
1955 if (region->hi == 0)
1956 rlen = len - xfered;
1958 rlen = region->hi - offset;
1960 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1962 /* Cannot read this region. Note that we can end up here only
1963 if the region is explicitly marked inaccessible, or
1964 'inaccessible-by-default' is in effect. */
1969 LONGEST to_read = min (len - xfered, rlen);
1970 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
1972 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1973 (gdb_byte *) buffer,
1974 offset + xfered, to_read);
1975 /* Call an observer, notifying them of the xfer progress? */
1978 /* Got an error reading full chunk. See if maybe we can read
1981 read_whatever_is_readable (ops, offset + xfered,
1982 offset + xfered + to_read, &result);
1987 struct memory_read_result r;
1989 r.begin = offset + xfered;
1990 r.end = r.begin + xfer;
1991 VEC_safe_push (memory_read_result_s, result, &r);
2001 /* An alternative to target_write with progress callbacks. */
2004 target_write_with_progress (struct target_ops *ops,
2005 enum target_object object,
2006 const char *annex, const gdb_byte *buf,
2007 ULONGEST offset, LONGEST len,
2008 void (*progress) (ULONGEST, void *), void *baton)
2012 /* Give the progress callback a chance to set up. */
2014 (*progress) (0, baton);
2016 while (xfered < len)
2018 LONGEST xfer = target_write_partial (ops, object, annex,
2019 (gdb_byte *) buf + xfered,
2020 offset + xfered, len - xfered);
2028 (*progress) (xfer, baton);
2036 /* For docs on target_write see target.h. */
2039 target_write (struct target_ops *ops,
2040 enum target_object object,
2041 const char *annex, const gdb_byte *buf,
2042 ULONGEST offset, LONGEST len)
2044 return target_write_with_progress (ops, object, annex, buf, offset, len,
2048 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2049 the size of the transferred data. PADDING additional bytes are
2050 available in *BUF_P. This is a helper function for
2051 target_read_alloc; see the declaration of that function for more
2055 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2056 const char *annex, gdb_byte **buf_p, int padding)
2058 size_t buf_alloc, buf_pos;
2062 /* This function does not have a length parameter; it reads the
2063 entire OBJECT). Also, it doesn't support objects fetched partly
2064 from one target and partly from another (in a different stratum,
2065 e.g. a core file and an executable). Both reasons make it
2066 unsuitable for reading memory. */
2067 gdb_assert (object != TARGET_OBJECT_MEMORY);
2069 /* Start by reading up to 4K at a time. The target will throttle
2070 this number down if necessary. */
2072 buf = xmalloc (buf_alloc);
2076 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2077 buf_pos, buf_alloc - buf_pos - padding);
2080 /* An error occurred. */
2086 /* Read all there was. */
2096 /* If the buffer is filling up, expand it. */
2097 if (buf_alloc < buf_pos * 2)
2100 buf = xrealloc (buf, buf_alloc);
2107 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2108 the size of the transferred data. See the declaration in "target.h"
2109 function for more information about the return value. */
2112 target_read_alloc (struct target_ops *ops, enum target_object object,
2113 const char *annex, gdb_byte **buf_p)
2115 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2118 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2119 returned as a string, allocated using xmalloc. If an error occurs
2120 or the transfer is unsupported, NULL is returned. Empty objects
2121 are returned as allocated but empty strings. A warning is issued
2122 if the result contains any embedded NUL bytes. */
2125 target_read_stralloc (struct target_ops *ops, enum target_object object,
2129 LONGEST transferred;
2131 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2133 if (transferred < 0)
2136 if (transferred == 0)
2137 return xstrdup ("");
2139 buffer[transferred] = 0;
2140 if (strlen (buffer) < transferred)
2141 warning (_("target object %d, annex %s, "
2142 "contained unexpected null characters"),
2143 (int) object, annex ? annex : "(none)");
2145 return (char *) buffer;
2148 /* Memory transfer methods. */
2151 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2154 /* This method is used to read from an alternate, non-current
2155 target. This read must bypass the overlay support (as symbols
2156 don't match this target), and GDB's internal cache (wrong cache
2157 for this target). */
2158 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2160 memory_error (EIO, addr);
2164 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2165 int len, enum bfd_endian byte_order)
2167 gdb_byte buf[sizeof (ULONGEST)];
2169 gdb_assert (len <= sizeof (buf));
2170 get_target_memory (ops, addr, buf, len);
2171 return extract_unsigned_integer (buf, len, byte_order);
2175 target_insert_breakpoint (struct gdbarch *gdbarch,
2176 struct bp_target_info *bp_tgt)
2178 if (!may_insert_breakpoints)
2180 warning (_("May not insert breakpoints"));
2184 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2188 target_remove_breakpoint (struct gdbarch *gdbarch,
2189 struct bp_target_info *bp_tgt)
2191 /* This is kind of a weird case to handle, but the permission might
2192 have been changed after breakpoints were inserted - in which case
2193 we should just take the user literally and assume that any
2194 breakpoints should be left in place. */
2195 if (!may_insert_breakpoints)
2197 warning (_("May not remove breakpoints"));
2201 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2205 target_info (char *args, int from_tty)
2207 struct target_ops *t;
2208 int has_all_mem = 0;
2210 if (symfile_objfile != NULL)
2211 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2213 for (t = target_stack; t != NULL; t = t->beneath)
2215 if (!(*t->to_has_memory) (t))
2218 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2221 printf_unfiltered (_("\tWhile running this, "
2222 "GDB does not access memory from...\n"));
2223 printf_unfiltered ("%s:\n", t->to_longname);
2224 (t->to_files_info) (t);
2225 has_all_mem = (*t->to_has_all_memory) (t);
2229 /* This function is called before any new inferior is created, e.g.
2230 by running a program, attaching, or connecting to a target.
2231 It cleans up any state from previous invocations which might
2232 change between runs. This is a subset of what target_preopen
2233 resets (things which might change between targets). */
2236 target_pre_inferior (int from_tty)
2238 /* Clear out solib state. Otherwise the solib state of the previous
2239 inferior might have survived and is entirely wrong for the new
2240 target. This has been observed on GNU/Linux using glibc 2.3. How
2252 Cannot access memory at address 0xdeadbeef
2255 /* In some OSs, the shared library list is the same/global/shared
2256 across inferiors. If code is shared between processes, so are
2257 memory regions and features. */
2258 if (!gdbarch_has_global_solist (target_gdbarch))
2260 no_shared_libraries (NULL, from_tty);
2262 invalidate_target_mem_regions ();
2264 target_clear_description ();
2268 /* Callback for iterate_over_inferiors. Gets rid of the given
2272 dispose_inferior (struct inferior *inf, void *args)
2274 struct thread_info *thread;
2276 thread = any_thread_of_process (inf->pid);
2279 switch_to_thread (thread->ptid);
2281 /* Core inferiors actually should be detached, not killed. */
2282 if (target_has_execution)
2285 target_detach (NULL, 0);
2291 /* This is to be called by the open routine before it does
2295 target_preopen (int from_tty)
2299 if (have_inferiors ())
2302 || !have_live_inferiors ()
2303 || query (_("A program is being debugged already. Kill it? ")))
2304 iterate_over_inferiors (dispose_inferior, NULL);
2306 error (_("Program not killed."));
2309 /* Calling target_kill may remove the target from the stack. But if
2310 it doesn't (which seems like a win for UDI), remove it now. */
2311 /* Leave the exec target, though. The user may be switching from a
2312 live process to a core of the same program. */
2313 pop_all_targets_above (file_stratum, 0);
2315 target_pre_inferior (from_tty);
2318 /* Detach a target after doing deferred register stores. */
2321 target_detach (char *args, int from_tty)
2323 struct target_ops* t;
2325 if (gdbarch_has_global_breakpoints (target_gdbarch))
2326 /* Don't remove global breakpoints here. They're removed on
2327 disconnection from the target. */
2330 /* If we're in breakpoints-always-inserted mode, have to remove
2331 them before detaching. */
2332 remove_breakpoints_pid (PIDGET (inferior_ptid));
2334 prepare_for_detach ();
2336 for (t = current_target.beneath; t != NULL; t = t->beneath)
2338 if (t->to_detach != NULL)
2340 t->to_detach (t, args, from_tty);
2342 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2348 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2352 target_disconnect (char *args, int from_tty)
2354 struct target_ops *t;
2356 /* If we're in breakpoints-always-inserted mode or if breakpoints
2357 are global across processes, we have to remove them before
2359 remove_breakpoints ();
2361 for (t = current_target.beneath; t != NULL; t = t->beneath)
2362 if (t->to_disconnect != NULL)
2365 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2367 t->to_disconnect (t, args, from_tty);
2375 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2377 struct target_ops *t;
2379 for (t = current_target.beneath; t != NULL; t = t->beneath)
2381 if (t->to_wait != NULL)
2383 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2387 char *status_string;
2389 status_string = target_waitstatus_to_string (status);
2390 fprintf_unfiltered (gdb_stdlog,
2391 "target_wait (%d, status) = %d, %s\n",
2392 PIDGET (ptid), PIDGET (retval),
2394 xfree (status_string);
2405 target_pid_to_str (ptid_t ptid)
2407 struct target_ops *t;
2409 for (t = current_target.beneath; t != NULL; t = t->beneath)
2411 if (t->to_pid_to_str != NULL)
2412 return (*t->to_pid_to_str) (t, ptid);
2415 return normal_pid_to_str (ptid);
2419 target_thread_name (struct thread_info *info)
2421 struct target_ops *t;
2423 for (t = current_target.beneath; t != NULL; t = t->beneath)
2425 if (t->to_thread_name != NULL)
2426 return (*t->to_thread_name) (info);
2433 target_resume (ptid_t ptid, int step, enum target_signal signal)
2435 struct target_ops *t;
2437 target_dcache_invalidate ();
2439 for (t = current_target.beneath; t != NULL; t = t->beneath)
2441 if (t->to_resume != NULL)
2443 t->to_resume (t, ptid, step, signal);
2445 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2447 step ? "step" : "continue",
2448 target_signal_to_name (signal));
2450 registers_changed_ptid (ptid);
2451 set_executing (ptid, 1);
2452 set_running (ptid, 1);
2453 clear_inline_frame_state (ptid);
2460 /* Look through the list of possible targets for a target that can
2464 target_follow_fork (int follow_child)
2466 struct target_ops *t;
2468 for (t = current_target.beneath; t != NULL; t = t->beneath)
2470 if (t->to_follow_fork != NULL)
2472 int retval = t->to_follow_fork (t, follow_child);
2475 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2476 follow_child, retval);
2481 /* Some target returned a fork event, but did not know how to follow it. */
2482 internal_error (__FILE__, __LINE__,
2483 _("could not find a target to follow fork"));
2487 target_mourn_inferior (void)
2489 struct target_ops *t;
2491 for (t = current_target.beneath; t != NULL; t = t->beneath)
2493 if (t->to_mourn_inferior != NULL)
2495 t->to_mourn_inferior (t);
2497 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2499 /* We no longer need to keep handles on any of the object files.
2500 Make sure to release them to avoid unnecessarily locking any
2501 of them while we're not actually debugging. */
2502 bfd_cache_close_all ();
2508 internal_error (__FILE__, __LINE__,
2509 _("could not find a target to follow mourn inferior"));
2512 /* Look for a target which can describe architectural features, starting
2513 from TARGET. If we find one, return its description. */
2515 const struct target_desc *
2516 target_read_description (struct target_ops *target)
2518 struct target_ops *t;
2520 for (t = target; t != NULL; t = t->beneath)
2521 if (t->to_read_description != NULL)
2523 const struct target_desc *tdesc;
2525 tdesc = t->to_read_description (t);
2533 /* The default implementation of to_search_memory.
2534 This implements a basic search of memory, reading target memory and
2535 performing the search here (as opposed to performing the search in on the
2536 target side with, for example, gdbserver). */
2539 simple_search_memory (struct target_ops *ops,
2540 CORE_ADDR start_addr, ULONGEST search_space_len,
2541 const gdb_byte *pattern, ULONGEST pattern_len,
2542 CORE_ADDR *found_addrp)
2544 /* NOTE: also defined in find.c testcase. */
2545 #define SEARCH_CHUNK_SIZE 16000
2546 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2547 /* Buffer to hold memory contents for searching. */
2548 gdb_byte *search_buf;
2549 unsigned search_buf_size;
2550 struct cleanup *old_cleanups;
2552 search_buf_size = chunk_size + pattern_len - 1;
2554 /* No point in trying to allocate a buffer larger than the search space. */
2555 if (search_space_len < search_buf_size)
2556 search_buf_size = search_space_len;
2558 search_buf = malloc (search_buf_size);
2559 if (search_buf == NULL)
2560 error (_("Unable to allocate memory to perform the search."));
2561 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2563 /* Prime the search buffer. */
2565 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2566 search_buf, start_addr, search_buf_size) != search_buf_size)
2568 warning (_("Unable to access target memory at %s, halting search."),
2569 hex_string (start_addr));
2570 do_cleanups (old_cleanups);
2574 /* Perform the search.
2576 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2577 When we've scanned N bytes we copy the trailing bytes to the start and
2578 read in another N bytes. */
2580 while (search_space_len >= pattern_len)
2582 gdb_byte *found_ptr;
2583 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2585 found_ptr = memmem (search_buf, nr_search_bytes,
2586 pattern, pattern_len);
2588 if (found_ptr != NULL)
2590 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2592 *found_addrp = found_addr;
2593 do_cleanups (old_cleanups);
2597 /* Not found in this chunk, skip to next chunk. */
2599 /* Don't let search_space_len wrap here, it's unsigned. */
2600 if (search_space_len >= chunk_size)
2601 search_space_len -= chunk_size;
2603 search_space_len = 0;
2605 if (search_space_len >= pattern_len)
2607 unsigned keep_len = search_buf_size - chunk_size;
2608 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2611 /* Copy the trailing part of the previous iteration to the front
2612 of the buffer for the next iteration. */
2613 gdb_assert (keep_len == pattern_len - 1);
2614 memcpy (search_buf, search_buf + chunk_size, keep_len);
2616 nr_to_read = min (search_space_len - keep_len, chunk_size);
2618 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2619 search_buf + keep_len, read_addr,
2620 nr_to_read) != nr_to_read)
2622 warning (_("Unable to access target "
2623 "memory at %s, halting search."),
2624 hex_string (read_addr));
2625 do_cleanups (old_cleanups);
2629 start_addr += chunk_size;
2635 do_cleanups (old_cleanups);
2639 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2640 sequence of bytes in PATTERN with length PATTERN_LEN.
2642 The result is 1 if found, 0 if not found, and -1 if there was an error
2643 requiring halting of the search (e.g. memory read error).
2644 If the pattern is found the address is recorded in FOUND_ADDRP. */
2647 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2648 const gdb_byte *pattern, ULONGEST pattern_len,
2649 CORE_ADDR *found_addrp)
2651 struct target_ops *t;
2654 /* We don't use INHERIT to set current_target.to_search_memory,
2655 so we have to scan the target stack and handle targetdebug
2659 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2660 hex_string (start_addr));
2662 for (t = current_target.beneath; t != NULL; t = t->beneath)
2663 if (t->to_search_memory != NULL)
2668 found = t->to_search_memory (t, start_addr, search_space_len,
2669 pattern, pattern_len, found_addrp);
2673 /* If a special version of to_search_memory isn't available, use the
2675 found = simple_search_memory (current_target.beneath,
2676 start_addr, search_space_len,
2677 pattern, pattern_len, found_addrp);
2681 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2686 /* Look through the currently pushed targets. If none of them will
2687 be able to restart the currently running process, issue an error
2691 target_require_runnable (void)
2693 struct target_ops *t;
2695 for (t = target_stack; t != NULL; t = t->beneath)
2697 /* If this target knows how to create a new program, then
2698 assume we will still be able to after killing the current
2699 one. Either killing and mourning will not pop T, or else
2700 find_default_run_target will find it again. */
2701 if (t->to_create_inferior != NULL)
2704 /* Do not worry about thread_stratum targets that can not
2705 create inferiors. Assume they will be pushed again if
2706 necessary, and continue to the process_stratum. */
2707 if (t->to_stratum == thread_stratum
2708 || t->to_stratum == arch_stratum)
2711 error (_("The \"%s\" target does not support \"run\". "
2712 "Try \"help target\" or \"continue\"."),
2716 /* This function is only called if the target is running. In that
2717 case there should have been a process_stratum target and it
2718 should either know how to create inferiors, or not... */
2719 internal_error (__FILE__, __LINE__, _("No targets found"));
2722 /* Look through the list of possible targets for a target that can
2723 execute a run or attach command without any other data. This is
2724 used to locate the default process stratum.
2726 If DO_MESG is not NULL, the result is always valid (error() is
2727 called for errors); else, return NULL on error. */
2729 static struct target_ops *
2730 find_default_run_target (char *do_mesg)
2732 struct target_ops **t;
2733 struct target_ops *runable = NULL;
2738 for (t = target_structs; t < target_structs + target_struct_size;
2741 if ((*t)->to_can_run && target_can_run (*t))
2751 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2760 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2762 struct target_ops *t;
2764 t = find_default_run_target ("attach");
2765 (t->to_attach) (t, args, from_tty);
2770 find_default_create_inferior (struct target_ops *ops,
2771 char *exec_file, char *allargs, char **env,
2774 struct target_ops *t;
2776 t = find_default_run_target ("run");
2777 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2782 find_default_can_async_p (void)
2784 struct target_ops *t;
2786 /* This may be called before the target is pushed on the stack;
2787 look for the default process stratum. If there's none, gdb isn't
2788 configured with a native debugger, and target remote isn't
2790 t = find_default_run_target (NULL);
2791 if (t && t->to_can_async_p)
2792 return (t->to_can_async_p) ();
2797 find_default_is_async_p (void)
2799 struct target_ops *t;
2801 /* This may be called before the target is pushed on the stack;
2802 look for the default process stratum. If there's none, gdb isn't
2803 configured with a native debugger, and target remote isn't
2805 t = find_default_run_target (NULL);
2806 if (t && t->to_is_async_p)
2807 return (t->to_is_async_p) ();
2812 find_default_supports_non_stop (void)
2814 struct target_ops *t;
2816 t = find_default_run_target (NULL);
2817 if (t && t->to_supports_non_stop)
2818 return (t->to_supports_non_stop) ();
2823 target_supports_non_stop (void)
2825 struct target_ops *t;
2827 for (t = ¤t_target; t != NULL; t = t->beneath)
2828 if (t->to_supports_non_stop)
2829 return t->to_supports_non_stop ();
2836 target_get_osdata (const char *type)
2838 struct target_ops *t;
2840 /* If we're already connected to something that can get us OS
2841 related data, use it. Otherwise, try using the native
2843 if (current_target.to_stratum >= process_stratum)
2844 t = current_target.beneath;
2846 t = find_default_run_target ("get OS data");
2851 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2854 /* Determine the current address space of thread PTID. */
2856 struct address_space *
2857 target_thread_address_space (ptid_t ptid)
2859 struct address_space *aspace;
2860 struct inferior *inf;
2861 struct target_ops *t;
2863 for (t = current_target.beneath; t != NULL; t = t->beneath)
2865 if (t->to_thread_address_space != NULL)
2867 aspace = t->to_thread_address_space (t, ptid);
2868 gdb_assert (aspace);
2871 fprintf_unfiltered (gdb_stdlog,
2872 "target_thread_address_space (%s) = %d\n",
2873 target_pid_to_str (ptid),
2874 address_space_num (aspace));
2879 /* Fall-back to the "main" address space of the inferior. */
2880 inf = find_inferior_pid (ptid_get_pid (ptid));
2882 if (inf == NULL || inf->aspace == NULL)
2883 internal_error (__FILE__, __LINE__,
2884 _("Can't determine the current "
2885 "address space of thread %s\n"),
2886 target_pid_to_str (ptid));
2892 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2894 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
2898 default_watchpoint_addr_within_range (struct target_ops *target,
2900 CORE_ADDR start, int length)
2902 return addr >= start && addr < start + length;
2905 static struct gdbarch *
2906 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
2908 return target_gdbarch;
2924 return_minus_one (void)
2929 /* Find a single runnable target in the stack and return it. If for
2930 some reason there is more than one, return NULL. */
2933 find_run_target (void)
2935 struct target_ops **t;
2936 struct target_ops *runable = NULL;
2941 for (t = target_structs; t < target_structs + target_struct_size; ++t)
2943 if ((*t)->to_can_run && target_can_run (*t))
2950 return (count == 1 ? runable : NULL);
2954 * Find the next target down the stack from the specified target.
2958 find_target_beneath (struct target_ops *t)
2964 /* The inferior process has died. Long live the inferior! */
2967 generic_mourn_inferior (void)
2971 ptid = inferior_ptid;
2972 inferior_ptid = null_ptid;
2974 if (!ptid_equal (ptid, null_ptid))
2976 int pid = ptid_get_pid (ptid);
2977 exit_inferior (pid);
2980 breakpoint_init_inferior (inf_exited);
2981 registers_changed ();
2983 reopen_exec_file ();
2984 reinit_frame_cache ();
2986 if (deprecated_detach_hook)
2987 deprecated_detach_hook ();
2990 /* Helper function for child_wait and the derivatives of child_wait.
2991 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
2992 translation of that in OURSTATUS. */
2994 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
2996 if (WIFEXITED (hoststatus))
2998 ourstatus->kind = TARGET_WAITKIND_EXITED;
2999 ourstatus->value.integer = WEXITSTATUS (hoststatus);
3001 else if (!WIFSTOPPED (hoststatus))
3003 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3004 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
3008 ourstatus->kind = TARGET_WAITKIND_STOPPED;
3009 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
3013 /* Convert a normal process ID to a string. Returns the string in a
3017 normal_pid_to_str (ptid_t ptid)
3019 static char buf[32];
3021 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3026 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3028 return normal_pid_to_str (ptid);
3031 /* Error-catcher for target_find_memory_regions. */
3033 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3035 error (_("Command not implemented for this target."));
3039 /* Error-catcher for target_make_corefile_notes. */
3041 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3043 error (_("Command not implemented for this target."));
3047 /* Error-catcher for target_get_bookmark. */
3049 dummy_get_bookmark (char *ignore1, int ignore2)
3055 /* Error-catcher for target_goto_bookmark. */
3057 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3062 /* Set up the handful of non-empty slots needed by the dummy target
3066 init_dummy_target (void)
3068 dummy_target.to_shortname = "None";
3069 dummy_target.to_longname = "None";
3070 dummy_target.to_doc = "";
3071 dummy_target.to_attach = find_default_attach;
3072 dummy_target.to_detach =
3073 (void (*)(struct target_ops *, char *, int))target_ignore;
3074 dummy_target.to_create_inferior = find_default_create_inferior;
3075 dummy_target.to_can_async_p = find_default_can_async_p;
3076 dummy_target.to_is_async_p = find_default_is_async_p;
3077 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3078 dummy_target.to_pid_to_str = dummy_pid_to_str;
3079 dummy_target.to_stratum = dummy_stratum;
3080 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3081 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3082 dummy_target.to_get_bookmark = dummy_get_bookmark;
3083 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3084 dummy_target.to_xfer_partial = default_xfer_partial;
3085 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3086 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3087 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3088 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3089 dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
3090 dummy_target.to_stopped_by_watchpoint = return_zero;
3091 dummy_target.to_stopped_data_address =
3092 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3093 dummy_target.to_magic = OPS_MAGIC;
3097 debug_to_open (char *args, int from_tty)
3099 debug_target.to_open (args, from_tty);
3101 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3105 target_close (struct target_ops *targ, int quitting)
3107 if (targ->to_xclose != NULL)
3108 targ->to_xclose (targ, quitting);
3109 else if (targ->to_close != NULL)
3110 targ->to_close (quitting);
3113 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3117 target_attach (char *args, int from_tty)
3119 struct target_ops *t;
3121 for (t = current_target.beneath; t != NULL; t = t->beneath)
3123 if (t->to_attach != NULL)
3125 t->to_attach (t, args, from_tty);
3127 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3133 internal_error (__FILE__, __LINE__,
3134 _("could not find a target to attach"));
3138 target_thread_alive (ptid_t ptid)
3140 struct target_ops *t;
3142 for (t = current_target.beneath; t != NULL; t = t->beneath)
3144 if (t->to_thread_alive != NULL)
3148 retval = t->to_thread_alive (t, ptid);
3150 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3151 PIDGET (ptid), retval);
3161 target_find_new_threads (void)
3163 struct target_ops *t;
3165 for (t = current_target.beneath; t != NULL; t = t->beneath)
3167 if (t->to_find_new_threads != NULL)
3169 t->to_find_new_threads (t);
3171 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3179 target_stop (ptid_t ptid)
3183 warning (_("May not interrupt or stop the target, ignoring attempt"));
3187 (*current_target.to_stop) (ptid);
3191 debug_to_post_attach (int pid)
3193 debug_target.to_post_attach (pid);
3195 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3198 /* Return a pretty printed form of target_waitstatus.
3199 Space for the result is malloc'd, caller must free. */
3202 target_waitstatus_to_string (const struct target_waitstatus *ws)
3204 const char *kind_str = "status->kind = ";
3208 case TARGET_WAITKIND_EXITED:
3209 return xstrprintf ("%sexited, status = %d",
3210 kind_str, ws->value.integer);
3211 case TARGET_WAITKIND_STOPPED:
3212 return xstrprintf ("%sstopped, signal = %s",
3213 kind_str, target_signal_to_name (ws->value.sig));
3214 case TARGET_WAITKIND_SIGNALLED:
3215 return xstrprintf ("%ssignalled, signal = %s",
3216 kind_str, target_signal_to_name (ws->value.sig));
3217 case TARGET_WAITKIND_LOADED:
3218 return xstrprintf ("%sloaded", kind_str);
3219 case TARGET_WAITKIND_FORKED:
3220 return xstrprintf ("%sforked", kind_str);
3221 case TARGET_WAITKIND_VFORKED:
3222 return xstrprintf ("%svforked", kind_str);
3223 case TARGET_WAITKIND_EXECD:
3224 return xstrprintf ("%sexecd", kind_str);
3225 case TARGET_WAITKIND_SYSCALL_ENTRY:
3226 return xstrprintf ("%sentered syscall", kind_str);
3227 case TARGET_WAITKIND_SYSCALL_RETURN:
3228 return xstrprintf ("%sexited syscall", kind_str);
3229 case TARGET_WAITKIND_SPURIOUS:
3230 return xstrprintf ("%sspurious", kind_str);
3231 case TARGET_WAITKIND_IGNORE:
3232 return xstrprintf ("%signore", kind_str);
3233 case TARGET_WAITKIND_NO_HISTORY:
3234 return xstrprintf ("%sno-history", kind_str);
3236 return xstrprintf ("%sunknown???", kind_str);
3241 debug_print_register (const char * func,
3242 struct regcache *regcache, int regno)
3244 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3246 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3247 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3248 && gdbarch_register_name (gdbarch, regno) != NULL
3249 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3250 fprintf_unfiltered (gdb_stdlog, "(%s)",
3251 gdbarch_register_name (gdbarch, regno));
3253 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3254 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3256 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3257 int i, size = register_size (gdbarch, regno);
3258 unsigned char buf[MAX_REGISTER_SIZE];
3260 regcache_raw_collect (regcache, regno, buf);
3261 fprintf_unfiltered (gdb_stdlog, " = ");
3262 for (i = 0; i < size; i++)
3264 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3266 if (size <= sizeof (LONGEST))
3268 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3270 fprintf_unfiltered (gdb_stdlog, " %s %s",
3271 core_addr_to_string_nz (val), plongest (val));
3274 fprintf_unfiltered (gdb_stdlog, "\n");
3278 target_fetch_registers (struct regcache *regcache, int regno)
3280 struct target_ops *t;
3282 for (t = current_target.beneath; t != NULL; t = t->beneath)
3284 if (t->to_fetch_registers != NULL)
3286 t->to_fetch_registers (t, regcache, regno);
3288 debug_print_register ("target_fetch_registers", regcache, regno);
3295 target_store_registers (struct regcache *regcache, int regno)
3297 struct target_ops *t;
3299 if (!may_write_registers)
3300 error (_("Writing to registers is not allowed (regno %d)"), regno);
3302 for (t = current_target.beneath; t != NULL; t = t->beneath)
3304 if (t->to_store_registers != NULL)
3306 t->to_store_registers (t, regcache, regno);
3309 debug_print_register ("target_store_registers", regcache, regno);
3319 target_core_of_thread (ptid_t ptid)
3321 struct target_ops *t;
3323 for (t = current_target.beneath; t != NULL; t = t->beneath)
3325 if (t->to_core_of_thread != NULL)
3327 int retval = t->to_core_of_thread (t, ptid);
3330 fprintf_unfiltered (gdb_stdlog,
3331 "target_core_of_thread (%d) = %d\n",
3332 PIDGET (ptid), retval);
3341 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3343 struct target_ops *t;
3345 for (t = current_target.beneath; t != NULL; t = t->beneath)
3347 if (t->to_verify_memory != NULL)
3349 int retval = t->to_verify_memory (t, data, memaddr, size);
3352 fprintf_unfiltered (gdb_stdlog,
3353 "target_verify_memory (%s, %s) = %d\n",
3354 paddress (target_gdbarch, memaddr),
3365 debug_to_prepare_to_store (struct regcache *regcache)
3367 debug_target.to_prepare_to_store (regcache);
3369 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3373 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3374 int write, struct mem_attrib *attrib,
3375 struct target_ops *target)
3379 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3382 fprintf_unfiltered (gdb_stdlog,
3383 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3384 paddress (target_gdbarch, memaddr), len,
3385 write ? "write" : "read", retval);
3391 fputs_unfiltered (", bytes =", gdb_stdlog);
3392 for (i = 0; i < retval; i++)
3394 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3396 if (targetdebug < 2 && i > 0)
3398 fprintf_unfiltered (gdb_stdlog, " ...");
3401 fprintf_unfiltered (gdb_stdlog, "\n");
3404 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3408 fputc_unfiltered ('\n', gdb_stdlog);
3414 debug_to_files_info (struct target_ops *target)
3416 debug_target.to_files_info (target);
3418 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3422 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3423 struct bp_target_info *bp_tgt)
3427 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3429 fprintf_unfiltered (gdb_stdlog,
3430 "target_insert_breakpoint (%s, xxx) = %ld\n",
3431 core_addr_to_string (bp_tgt->placed_address),
3432 (unsigned long) retval);
3437 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3438 struct bp_target_info *bp_tgt)
3442 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3444 fprintf_unfiltered (gdb_stdlog,
3445 "target_remove_breakpoint (%s, xxx) = %ld\n",
3446 core_addr_to_string (bp_tgt->placed_address),
3447 (unsigned long) retval);
3452 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3456 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3458 fprintf_unfiltered (gdb_stdlog,
3459 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3460 (unsigned long) type,
3461 (unsigned long) cnt,
3462 (unsigned long) from_tty,
3463 (unsigned long) retval);
3468 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3472 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3474 fprintf_unfiltered (gdb_stdlog,
3475 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3476 core_addr_to_string (addr), (unsigned long) len,
3477 core_addr_to_string (retval));
3482 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3483 struct expression *cond)
3487 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3490 fprintf_unfiltered (gdb_stdlog,
3491 "target_can_accel_watchpoint_condition "
3492 "(%s, %d, %d, %s) = %ld\n",
3493 core_addr_to_string (addr), len, rw,
3494 host_address_to_string (cond), (unsigned long) retval);
3499 debug_to_stopped_by_watchpoint (void)
3503 retval = debug_target.to_stopped_by_watchpoint ();
3505 fprintf_unfiltered (gdb_stdlog,
3506 "target_stopped_by_watchpoint () = %ld\n",
3507 (unsigned long) retval);
3512 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3516 retval = debug_target.to_stopped_data_address (target, addr);
3518 fprintf_unfiltered (gdb_stdlog,
3519 "target_stopped_data_address ([%s]) = %ld\n",
3520 core_addr_to_string (*addr),
3521 (unsigned long)retval);
3526 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3528 CORE_ADDR start, int length)
3532 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3535 fprintf_filtered (gdb_stdlog,
3536 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3537 core_addr_to_string (addr), core_addr_to_string (start),
3543 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3544 struct bp_target_info *bp_tgt)
3548 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3550 fprintf_unfiltered (gdb_stdlog,
3551 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3552 core_addr_to_string (bp_tgt->placed_address),
3553 (unsigned long) retval);
3558 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3559 struct bp_target_info *bp_tgt)
3563 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3565 fprintf_unfiltered (gdb_stdlog,
3566 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3567 core_addr_to_string (bp_tgt->placed_address),
3568 (unsigned long) retval);
3573 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3574 struct expression *cond)
3578 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3580 fprintf_unfiltered (gdb_stdlog,
3581 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3582 core_addr_to_string (addr), len, type,
3583 host_address_to_string (cond), (unsigned long) retval);
3588 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3589 struct expression *cond)
3593 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3595 fprintf_unfiltered (gdb_stdlog,
3596 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3597 core_addr_to_string (addr), len, type,
3598 host_address_to_string (cond), (unsigned long) retval);
3603 debug_to_terminal_init (void)
3605 debug_target.to_terminal_init ();
3607 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3611 debug_to_terminal_inferior (void)
3613 debug_target.to_terminal_inferior ();
3615 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3619 debug_to_terminal_ours_for_output (void)
3621 debug_target.to_terminal_ours_for_output ();
3623 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3627 debug_to_terminal_ours (void)
3629 debug_target.to_terminal_ours ();
3631 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3635 debug_to_terminal_save_ours (void)
3637 debug_target.to_terminal_save_ours ();
3639 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3643 debug_to_terminal_info (char *arg, int from_tty)
3645 debug_target.to_terminal_info (arg, from_tty);
3647 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3652 debug_to_load (char *args, int from_tty)
3654 debug_target.to_load (args, from_tty);
3656 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3660 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
3664 retval = debug_target.to_lookup_symbol (name, addrp);
3666 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
3672 debug_to_post_startup_inferior (ptid_t ptid)
3674 debug_target.to_post_startup_inferior (ptid);
3676 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3681 debug_to_insert_fork_catchpoint (int pid)
3685 retval = debug_target.to_insert_fork_catchpoint (pid);
3687 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
3694 debug_to_remove_fork_catchpoint (int pid)
3698 retval = debug_target.to_remove_fork_catchpoint (pid);
3700 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3707 debug_to_insert_vfork_catchpoint (int pid)
3711 retval = debug_target.to_insert_vfork_catchpoint (pid);
3713 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
3720 debug_to_remove_vfork_catchpoint (int pid)
3724 retval = debug_target.to_remove_vfork_catchpoint (pid);
3726 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3733 debug_to_insert_exec_catchpoint (int pid)
3737 retval = debug_target.to_insert_exec_catchpoint (pid);
3739 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
3746 debug_to_remove_exec_catchpoint (int pid)
3750 retval = debug_target.to_remove_exec_catchpoint (pid);
3752 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
3759 debug_to_has_exited (int pid, int wait_status, int *exit_status)
3763 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
3765 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
3766 pid, wait_status, *exit_status, has_exited);
3772 debug_to_can_run (void)
3776 retval = debug_target.to_can_run ();
3778 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
3784 debug_to_notice_signals (ptid_t ptid)
3786 debug_target.to_notice_signals (ptid);
3788 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
3792 static struct gdbarch *
3793 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
3795 struct gdbarch *retval;
3797 retval = debug_target.to_thread_architecture (ops, ptid);
3799 fprintf_unfiltered (gdb_stdlog,
3800 "target_thread_architecture (%s) = %s [%s]\n",
3801 target_pid_to_str (ptid),
3802 host_address_to_string (retval),
3803 gdbarch_bfd_arch_info (retval)->printable_name);
3808 debug_to_stop (ptid_t ptid)
3810 debug_target.to_stop (ptid);
3812 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
3813 target_pid_to_str (ptid));
3817 debug_to_rcmd (char *command,
3818 struct ui_file *outbuf)
3820 debug_target.to_rcmd (command, outbuf);
3821 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
3825 debug_to_pid_to_exec_file (int pid)
3829 exec_file = debug_target.to_pid_to_exec_file (pid);
3831 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
3838 setup_target_debug (void)
3840 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3842 current_target.to_open = debug_to_open;
3843 current_target.to_post_attach = debug_to_post_attach;
3844 current_target.to_prepare_to_store = debug_to_prepare_to_store;
3845 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
3846 current_target.to_files_info = debug_to_files_info;
3847 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
3848 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
3849 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
3850 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
3851 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
3852 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
3853 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
3854 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
3855 current_target.to_stopped_data_address = debug_to_stopped_data_address;
3856 current_target.to_watchpoint_addr_within_range
3857 = debug_to_watchpoint_addr_within_range;
3858 current_target.to_region_ok_for_hw_watchpoint
3859 = debug_to_region_ok_for_hw_watchpoint;
3860 current_target.to_can_accel_watchpoint_condition
3861 = debug_to_can_accel_watchpoint_condition;
3862 current_target.to_terminal_init = debug_to_terminal_init;
3863 current_target.to_terminal_inferior = debug_to_terminal_inferior;
3864 current_target.to_terminal_ours_for_output
3865 = debug_to_terminal_ours_for_output;
3866 current_target.to_terminal_ours = debug_to_terminal_ours;
3867 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
3868 current_target.to_terminal_info = debug_to_terminal_info;
3869 current_target.to_load = debug_to_load;
3870 current_target.to_lookup_symbol = debug_to_lookup_symbol;
3871 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
3872 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
3873 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
3874 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
3875 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
3876 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
3877 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
3878 current_target.to_has_exited = debug_to_has_exited;
3879 current_target.to_can_run = debug_to_can_run;
3880 current_target.to_notice_signals = debug_to_notice_signals;
3881 current_target.to_stop = debug_to_stop;
3882 current_target.to_rcmd = debug_to_rcmd;
3883 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
3884 current_target.to_thread_architecture = debug_to_thread_architecture;
3888 static char targ_desc[] =
3889 "Names of targets and files being debugged.\nShows the entire \
3890 stack of targets currently in use (including the exec-file,\n\
3891 core-file, and process, if any), as well as the symbol file name.";
3894 do_monitor_command (char *cmd,
3897 if ((current_target.to_rcmd
3898 == (void (*) (char *, struct ui_file *)) tcomplain)
3899 || (current_target.to_rcmd == debug_to_rcmd
3900 && (debug_target.to_rcmd
3901 == (void (*) (char *, struct ui_file *)) tcomplain)))
3902 error (_("\"monitor\" command not supported by this target."));
3903 target_rcmd (cmd, gdb_stdtarg);
3906 /* Print the name of each layers of our target stack. */
3909 maintenance_print_target_stack (char *cmd, int from_tty)
3911 struct target_ops *t;
3913 printf_filtered (_("The current target stack is:\n"));
3915 for (t = target_stack; t != NULL; t = t->beneath)
3917 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3921 /* Controls if async mode is permitted. */
3922 int target_async_permitted = 0;
3924 /* The set command writes to this variable. If the inferior is
3925 executing, linux_nat_async_permitted is *not* updated. */
3926 static int target_async_permitted_1 = 0;
3929 set_maintenance_target_async_permitted (char *args, int from_tty,
3930 struct cmd_list_element *c)
3932 if (have_live_inferiors ())
3934 target_async_permitted_1 = target_async_permitted;
3935 error (_("Cannot change this setting while the inferior is running."));
3938 target_async_permitted = target_async_permitted_1;
3942 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
3943 struct cmd_list_element *c,
3946 fprintf_filtered (file,
3947 _("Controlling the inferior in "
3948 "asynchronous mode is %s.\n"), value);
3951 /* Temporary copies of permission settings. */
3953 static int may_write_registers_1 = 1;
3954 static int may_write_memory_1 = 1;
3955 static int may_insert_breakpoints_1 = 1;
3956 static int may_insert_tracepoints_1 = 1;
3957 static int may_insert_fast_tracepoints_1 = 1;
3958 static int may_stop_1 = 1;
3960 /* Make the user-set values match the real values again. */
3963 update_target_permissions (void)
3965 may_write_registers_1 = may_write_registers;
3966 may_write_memory_1 = may_write_memory;
3967 may_insert_breakpoints_1 = may_insert_breakpoints;
3968 may_insert_tracepoints_1 = may_insert_tracepoints;
3969 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3970 may_stop_1 = may_stop;
3973 /* The one function handles (most of) the permission flags in the same
3977 set_target_permissions (char *args, int from_tty,
3978 struct cmd_list_element *c)
3980 if (target_has_execution)
3982 update_target_permissions ();
3983 error (_("Cannot change this setting while the inferior is running."));
3986 /* Make the real values match the user-changed values. */
3987 may_write_registers = may_write_registers_1;
3988 may_insert_breakpoints = may_insert_breakpoints_1;
3989 may_insert_tracepoints = may_insert_tracepoints_1;
3990 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
3991 may_stop = may_stop_1;
3992 update_observer_mode ();
3995 /* Set memory write permission independently of observer mode. */
3998 set_write_memory_permission (char *args, int from_tty,
3999 struct cmd_list_element *c)
4001 /* Make the real values match the user-changed values. */
4002 may_write_memory = may_write_memory_1;
4003 update_observer_mode ();
4008 initialize_targets (void)
4010 init_dummy_target ();
4011 push_target (&dummy_target);
4013 add_info ("target", target_info, targ_desc);
4014 add_info ("files", target_info, targ_desc);
4016 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4017 Set target debugging."), _("\
4018 Show target debugging."), _("\
4019 When non-zero, target debugging is enabled. Higher numbers are more\n\
4020 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4024 &setdebuglist, &showdebuglist);
4026 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4027 &trust_readonly, _("\
4028 Set mode for reading from readonly sections."), _("\
4029 Show mode for reading from readonly sections."), _("\
4030 When this mode is on, memory reads from readonly sections (such as .text)\n\
4031 will be read from the object file instead of from the target. This will\n\
4032 result in significant performance improvement for remote targets."),
4034 show_trust_readonly,
4035 &setlist, &showlist);
4037 add_com ("monitor", class_obscure, do_monitor_command,
4038 _("Send a command to the remote monitor (remote targets only)."));
4040 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4041 _("Print the name of each layer of the internal target stack."),
4042 &maintenanceprintlist);
4044 add_setshow_boolean_cmd ("target-async", no_class,
4045 &target_async_permitted_1, _("\
4046 Set whether gdb controls the inferior in asynchronous mode."), _("\
4047 Show whether gdb controls the inferior in asynchronous mode."), _("\
4048 Tells gdb whether to control the inferior in asynchronous mode."),
4049 set_maintenance_target_async_permitted,
4050 show_maintenance_target_async_permitted,
4054 add_setshow_boolean_cmd ("stack-cache", class_support,
4055 &stack_cache_enabled_p_1, _("\
4056 Set cache use for stack access."), _("\
4057 Show cache use for stack access."), _("\
4058 When on, use the data cache for all stack access, regardless of any\n\
4059 configured memory regions. This improves remote performance significantly.\n\
4060 By default, caching for stack access is on."),
4061 set_stack_cache_enabled_p,
4062 show_stack_cache_enabled_p,
4063 &setlist, &showlist);
4065 add_setshow_boolean_cmd ("may-write-registers", class_support,
4066 &may_write_registers_1, _("\
4067 Set permission to write into registers."), _("\
4068 Show permission to write into registers."), _("\
4069 When this permission is on, GDB may write into the target's registers.\n\
4070 Otherwise, any sort of write attempt will result in an error."),
4071 set_target_permissions, NULL,
4072 &setlist, &showlist);
4074 add_setshow_boolean_cmd ("may-write-memory", class_support,
4075 &may_write_memory_1, _("\
4076 Set permission to write into target memory."), _("\
4077 Show permission to write into target memory."), _("\
4078 When this permission is on, GDB may write into the target's memory.\n\
4079 Otherwise, any sort of write attempt will result in an error."),
4080 set_write_memory_permission, NULL,
4081 &setlist, &showlist);
4083 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4084 &may_insert_breakpoints_1, _("\
4085 Set permission to insert breakpoints in the target."), _("\
4086 Show permission to insert breakpoints in the target."), _("\
4087 When this permission is on, GDB may insert breakpoints in the program.\n\
4088 Otherwise, any sort of insertion attempt will result in an error."),
4089 set_target_permissions, NULL,
4090 &setlist, &showlist);
4092 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4093 &may_insert_tracepoints_1, _("\
4094 Set permission to insert tracepoints in the target."), _("\
4095 Show permission to insert tracepoints in the target."), _("\
4096 When this permission is on, GDB may insert tracepoints in the program.\n\
4097 Otherwise, any sort of insertion attempt will result in an error."),
4098 set_target_permissions, NULL,
4099 &setlist, &showlist);
4101 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4102 &may_insert_fast_tracepoints_1, _("\
4103 Set permission to insert fast tracepoints in the target."), _("\
4104 Show permission to insert fast tracepoints in the target."), _("\
4105 When this permission is on, GDB may insert fast tracepoints.\n\
4106 Otherwise, any sort of insertion attempt will result in an error."),
4107 set_target_permissions, NULL,
4108 &setlist, &showlist);
4110 add_setshow_boolean_cmd ("may-interrupt", class_support,
4112 Set permission to interrupt or signal the target."), _("\
4113 Show permission to interrupt or signal the target."), _("\
4114 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4115 Otherwise, any attempt to interrupt or stop will be ignored."),
4116 set_target_permissions, NULL,
4117 &setlist, &showlist);
4120 target_dcache = dcache_init ();