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 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
161 wierd and mysterious ways. Putting the variable here lets those
162 wierd and mysterious ways keep building while they are being
163 converted to the inferior inheritance structure. */
164 struct target_ops deprecated_child_ops;
166 /* Pointer to array of target architecture structures; the size of the
167 array; the current index into the array; the allocated size of the
169 struct target_ops **target_structs;
170 unsigned target_struct_size;
171 unsigned target_struct_index;
172 unsigned target_struct_allocsize;
173 #define DEFAULT_ALLOCSIZE 10
175 /* The initial current target, so that there is always a semi-valid
178 static struct target_ops dummy_target;
180 /* Top of target stack. */
182 static struct target_ops *target_stack;
184 /* The target structure we are currently using to talk to a process
185 or file or whatever "inferior" we have. */
187 struct target_ops current_target;
189 /* Command list for target. */
191 static struct cmd_list_element *targetlist = NULL;
193 /* Nonzero if we should trust readonly sections from the
194 executable when reading memory. */
196 static int trust_readonly = 0;
198 /* Nonzero if we should show true memory content including
199 memory breakpoint inserted by gdb. */
201 static int show_memory_breakpoints = 0;
203 /* These globals control whether GDB attempts to perform these
204 operations; they are useful for targets that need to prevent
205 inadvertant disruption, such as in non-stop mode. */
207 int may_write_registers = 1;
209 int may_write_memory = 1;
211 int may_insert_breakpoints = 1;
213 int may_insert_tracepoints = 1;
215 int may_insert_fast_tracepoints = 1;
219 /* Non-zero if we want to see trace of target level stuff. */
221 static int targetdebug = 0;
223 show_targetdebug (struct ui_file *file, int from_tty,
224 struct cmd_list_element *c, const char *value)
226 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
229 static void setup_target_debug (void);
231 /* The option sets this. */
232 static int stack_cache_enabled_p_1 = 1;
233 /* And set_stack_cache_enabled_p updates this.
234 The reason for the separation is so that we don't flush the cache for
235 on->on transitions. */
236 static int stack_cache_enabled_p = 1;
238 /* This is called *after* the stack-cache has been set.
239 Flush the cache for off->on and on->off transitions.
240 There's no real need to flush the cache for on->off transitions,
241 except cleanliness. */
244 set_stack_cache_enabled_p (char *args, int from_tty,
245 struct cmd_list_element *c)
247 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
248 target_dcache_invalidate ();
250 stack_cache_enabled_p = stack_cache_enabled_p_1;
254 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
255 struct cmd_list_element *c, const char *value)
257 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
260 /* Cache of memory operations, to speed up remote access. */
261 static DCACHE *target_dcache;
263 /* Invalidate the target dcache. */
266 target_dcache_invalidate (void)
268 dcache_invalidate (target_dcache);
271 /* The user just typed 'target' without the name of a target. */
274 target_command (char *arg, int from_tty)
276 fputs_filtered ("Argument required (target name). Try `help target'\n",
280 /* Default target_has_* methods for process_stratum targets. */
283 default_child_has_all_memory (struct target_ops *ops)
285 /* If no inferior selected, then we can't read memory here. */
286 if (ptid_equal (inferior_ptid, null_ptid))
293 default_child_has_memory (struct target_ops *ops)
295 /* If no inferior selected, then we can't read memory here. */
296 if (ptid_equal (inferior_ptid, null_ptid))
303 default_child_has_stack (struct target_ops *ops)
305 /* If no inferior selected, there's no stack. */
306 if (ptid_equal (inferior_ptid, null_ptid))
313 default_child_has_registers (struct target_ops *ops)
315 /* Can't read registers from no inferior. */
316 if (ptid_equal (inferior_ptid, null_ptid))
323 default_child_has_execution (struct target_ops *ops)
325 /* If there's no thread selected, then we can't make it run through
327 if (ptid_equal (inferior_ptid, null_ptid))
335 target_has_all_memory_1 (void)
337 struct target_ops *t;
339 for (t = current_target.beneath; t != NULL; t = t->beneath)
340 if (t->to_has_all_memory (t))
347 target_has_memory_1 (void)
349 struct target_ops *t;
351 for (t = current_target.beneath; t != NULL; t = t->beneath)
352 if (t->to_has_memory (t))
359 target_has_stack_1 (void)
361 struct target_ops *t;
363 for (t = current_target.beneath; t != NULL; t = t->beneath)
364 if (t->to_has_stack (t))
371 target_has_registers_1 (void)
373 struct target_ops *t;
375 for (t = current_target.beneath; t != NULL; t = t->beneath)
376 if (t->to_has_registers (t))
383 target_has_execution_1 (void)
385 struct target_ops *t;
387 for (t = current_target.beneath; t != NULL; t = t->beneath)
388 if (t->to_has_execution (t))
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops *t)
399 /* Provide default values for all "must have" methods. */
400 if (t->to_xfer_partial == NULL)
401 t->to_xfer_partial = default_xfer_partial;
403 if (t->to_has_all_memory == NULL)
404 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_memory == NULL)
407 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_stack == NULL)
410 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
412 if (t->to_has_registers == NULL)
413 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
415 if (t->to_has_execution == NULL)
416 t->to_has_execution = (int (*) (struct target_ops *)) return_zero;
420 target_struct_allocsize = DEFAULT_ALLOCSIZE;
421 target_structs = (struct target_ops **) xmalloc
422 (target_struct_allocsize * sizeof (*target_structs));
424 if (target_struct_size >= target_struct_allocsize)
426 target_struct_allocsize *= 2;
427 target_structs = (struct target_ops **)
428 xrealloc ((char *) target_structs,
429 target_struct_allocsize * sizeof (*target_structs));
431 target_structs[target_struct_size++] = t;
433 if (targetlist == NULL)
434 add_prefix_cmd ("target", class_run, target_command, _("\
435 Connect to a target machine or process.\n\
436 The first argument is the type or protocol of the target machine.\n\
437 Remaining arguments are interpreted by the target protocol. For more\n\
438 information on the arguments for a particular protocol, type\n\
439 `help target ' followed by the protocol name."),
440 &targetlist, "target ", 0, &cmdlist);
441 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
454 struct target_ops *t;
456 for (t = current_target.beneath; t != NULL; t = t->beneath)
457 if (t->to_kill != NULL)
460 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
470 target_load (char *arg, int from_tty)
472 target_dcache_invalidate ();
473 (*current_target.to_load) (arg, from_tty);
477 target_create_inferior (char *exec_file, char *args,
478 char **env, int from_tty)
480 struct target_ops *t;
482 for (t = current_target.beneath; t != NULL; t = t->beneath)
484 if (t->to_create_inferior != NULL)
486 t->to_create_inferior (t, exec_file, args, env, from_tty);
488 fprintf_unfiltered (gdb_stdlog,
489 "target_create_inferior (%s, %s, xxx, %d)\n",
490 exec_file, args, from_tty);
495 internal_error (__FILE__, __LINE__,
496 _("could not find a target to create inferior"));
500 target_terminal_inferior (void)
502 /* A background resume (``run&'') should leave GDB in control of the
503 terminal. Use target_can_async_p, not target_is_async_p, since at
504 this point the target is not async yet. However, if sync_execution
505 is not set, we know it will become async prior to resume. */
506 if (target_can_async_p () && !sync_execution)
509 /* If GDB is resuming the inferior in the foreground, install
510 inferior's terminal modes. */
511 (*current_target.to_terminal_inferior) ();
515 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
516 struct target_ops *t)
518 errno = EIO; /* Can't read/write this location */
519 return 0; /* No bytes handled */
525 error (_("You can't do that when your target is `%s'"),
526 current_target.to_shortname);
532 error (_("You can't do that without a process to debug."));
536 nosymbol (char *name, CORE_ADDR *addrp)
538 return 1; /* Symbol does not exist in target env */
542 default_terminal_info (char *args, int from_tty)
544 printf_unfiltered (_("No saved terminal information.\n"));
547 /* A default implementation for the to_get_ada_task_ptid target method.
549 This function builds the PTID by using both LWP and TID as part of
550 the PTID lwp and tid elements. The pid used is the pid of the
554 default_get_ada_task_ptid (long lwp, long tid)
556 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops *t;
576 /* First, reset current's contents. */
577 memset (¤t_target, 0, sizeof (current_target));
579 #define INHERIT(FIELD, TARGET) \
580 if (!current_target.FIELD) \
581 current_target.FIELD = (TARGET)->FIELD
583 for (t = target_stack; t; t = t->beneath)
585 INHERIT (to_shortname, t);
586 INHERIT (to_longname, t);
588 /* Do not inherit to_open. */
589 /* Do not inherit to_close. */
590 /* Do not inherit to_attach. */
591 INHERIT (to_post_attach, t);
592 INHERIT (to_attach_no_wait, t);
593 /* Do not inherit to_detach. */
594 /* Do not inherit to_disconnect. */
595 /* Do not inherit to_resume. */
596 /* Do not inherit to_wait. */
597 /* Do not inherit to_fetch_registers. */
598 /* Do not inherit to_store_registers. */
599 INHERIT (to_prepare_to_store, t);
600 INHERIT (deprecated_xfer_memory, t);
601 INHERIT (to_files_info, t);
602 INHERIT (to_insert_breakpoint, t);
603 INHERIT (to_remove_breakpoint, t);
604 INHERIT (to_can_use_hw_breakpoint, t);
605 INHERIT (to_insert_hw_breakpoint, t);
606 INHERIT (to_remove_hw_breakpoint, t);
607 INHERIT (to_insert_watchpoint, t);
608 INHERIT (to_remove_watchpoint, t);
609 INHERIT (to_stopped_data_address, t);
610 INHERIT (to_have_steppable_watchpoint, t);
611 INHERIT (to_have_continuable_watchpoint, t);
612 INHERIT (to_stopped_by_watchpoint, t);
613 INHERIT (to_watchpoint_addr_within_range, t);
614 INHERIT (to_region_ok_for_hw_watchpoint, t);
615 INHERIT (to_can_accel_watchpoint_condition, t);
616 INHERIT (to_terminal_init, t);
617 INHERIT (to_terminal_inferior, t);
618 INHERIT (to_terminal_ours_for_output, t);
619 INHERIT (to_terminal_ours, t);
620 INHERIT (to_terminal_save_ours, t);
621 INHERIT (to_terminal_info, t);
622 /* Do not inherit to_kill. */
623 INHERIT (to_load, t);
624 INHERIT (to_lookup_symbol, t);
625 /* Do no inherit to_create_inferior. */
626 INHERIT (to_post_startup_inferior, t);
627 INHERIT (to_insert_fork_catchpoint, t);
628 INHERIT (to_remove_fork_catchpoint, t);
629 INHERIT (to_insert_vfork_catchpoint, t);
630 INHERIT (to_remove_vfork_catchpoint, t);
631 /* Do not inherit to_follow_fork. */
632 INHERIT (to_insert_exec_catchpoint, t);
633 INHERIT (to_remove_exec_catchpoint, t);
634 INHERIT (to_set_syscall_catchpoint, t);
635 INHERIT (to_has_exited, t);
636 /* Do not inherit to_mourn_inferior. */
637 INHERIT (to_can_run, t);
638 INHERIT (to_notice_signals, t);
639 /* Do not inherit to_thread_alive. */
640 /* Do not inherit to_find_new_threads. */
641 /* Do not inherit to_pid_to_str. */
642 INHERIT (to_extra_thread_info, t);
643 INHERIT (to_stop, t);
644 /* Do not inherit to_xfer_partial. */
645 INHERIT (to_rcmd, t);
646 INHERIT (to_pid_to_exec_file, t);
647 INHERIT (to_log_command, t);
648 INHERIT (to_stratum, t);
649 /* Do not inherit to_has_all_memory */
650 /* Do not inherit to_has_memory */
651 /* Do not inherit to_has_stack */
652 /* Do not inherit to_has_registers */
653 /* Do not inherit to_has_execution */
654 INHERIT (to_has_thread_control, t);
655 INHERIT (to_can_async_p, t);
656 INHERIT (to_is_async_p, t);
657 INHERIT (to_async, t);
658 INHERIT (to_async_mask, t);
659 INHERIT (to_find_memory_regions, t);
660 INHERIT (to_make_corefile_notes, t);
661 INHERIT (to_get_bookmark, t);
662 INHERIT (to_goto_bookmark, t);
663 /* Do not inherit to_get_thread_local_address. */
664 INHERIT (to_can_execute_reverse, t);
665 INHERIT (to_thread_architecture, t);
666 /* Do not inherit to_read_description. */
667 INHERIT (to_get_ada_task_ptid, t);
668 /* Do not inherit to_search_memory. */
669 INHERIT (to_supports_multi_process, t);
670 INHERIT (to_trace_init, t);
671 INHERIT (to_download_tracepoint, t);
672 INHERIT (to_download_trace_state_variable, t);
673 INHERIT (to_trace_set_readonly_regions, t);
674 INHERIT (to_trace_start, t);
675 INHERIT (to_get_trace_status, t);
676 INHERIT (to_trace_stop, t);
677 INHERIT (to_trace_find, t);
678 INHERIT (to_get_trace_state_variable_value, t);
679 INHERIT (to_save_trace_data, t);
680 INHERIT (to_upload_tracepoints, t);
681 INHERIT (to_upload_trace_state_variables, t);
682 INHERIT (to_get_raw_trace_data, t);
683 INHERIT (to_set_disconnected_tracing, t);
684 INHERIT (to_set_circular_trace_buffer, t);
685 INHERIT (to_get_tib_address, t);
686 INHERIT (to_set_permissions, t);
687 INHERIT (to_static_tracepoint_marker_at, t);
688 INHERIT (to_static_tracepoint_markers_by_strid, t);
689 INHERIT (to_magic, t);
690 /* Do not inherit to_memory_map. */
691 /* Do not inherit to_flash_erase. */
692 /* Do not inherit to_flash_done. */
696 /* Clean up a target struct so it no longer has any zero pointers in
697 it. Some entries are defaulted to a method that print an error,
698 others are hard-wired to a standard recursive default. */
700 #define de_fault(field, value) \
701 if (!current_target.field) \
702 current_target.field = value
705 (void (*) (char *, int))
710 de_fault (to_post_attach,
713 de_fault (to_prepare_to_store,
714 (void (*) (struct regcache *))
716 de_fault (deprecated_xfer_memory,
717 (int (*) (CORE_ADDR, gdb_byte *, int, int,
718 struct mem_attrib *, struct target_ops *))
720 de_fault (to_files_info,
721 (void (*) (struct target_ops *))
723 de_fault (to_insert_breakpoint,
724 memory_insert_breakpoint);
725 de_fault (to_remove_breakpoint,
726 memory_remove_breakpoint);
727 de_fault (to_can_use_hw_breakpoint,
728 (int (*) (int, int, int))
730 de_fault (to_insert_hw_breakpoint,
731 (int (*) (struct gdbarch *, struct bp_target_info *))
733 de_fault (to_remove_hw_breakpoint,
734 (int (*) (struct gdbarch *, struct bp_target_info *))
736 de_fault (to_insert_watchpoint,
737 (int (*) (CORE_ADDR, int, int, struct expression *))
739 de_fault (to_remove_watchpoint,
740 (int (*) (CORE_ADDR, int, int, struct expression *))
742 de_fault (to_stopped_by_watchpoint,
745 de_fault (to_stopped_data_address,
746 (int (*) (struct target_ops *, CORE_ADDR *))
748 de_fault (to_watchpoint_addr_within_range,
749 default_watchpoint_addr_within_range);
750 de_fault (to_region_ok_for_hw_watchpoint,
751 default_region_ok_for_hw_watchpoint);
752 de_fault (to_can_accel_watchpoint_condition,
753 (int (*) (CORE_ADDR, int, int, struct expression *))
755 de_fault (to_terminal_init,
758 de_fault (to_terminal_inferior,
761 de_fault (to_terminal_ours_for_output,
764 de_fault (to_terminal_ours,
767 de_fault (to_terminal_save_ours,
770 de_fault (to_terminal_info,
771 default_terminal_info);
773 (void (*) (char *, int))
775 de_fault (to_lookup_symbol,
776 (int (*) (char *, CORE_ADDR *))
778 de_fault (to_post_startup_inferior,
781 de_fault (to_insert_fork_catchpoint,
784 de_fault (to_remove_fork_catchpoint,
787 de_fault (to_insert_vfork_catchpoint,
790 de_fault (to_remove_vfork_catchpoint,
793 de_fault (to_insert_exec_catchpoint,
796 de_fault (to_remove_exec_catchpoint,
799 de_fault (to_set_syscall_catchpoint,
800 (int (*) (int, int, int, int, int *))
802 de_fault (to_has_exited,
803 (int (*) (int, int, int *))
805 de_fault (to_can_run,
807 de_fault (to_notice_signals,
810 de_fault (to_extra_thread_info,
811 (char *(*) (struct thread_info *))
816 current_target.to_xfer_partial = current_xfer_partial;
818 (void (*) (char *, struct ui_file *))
820 de_fault (to_pid_to_exec_file,
824 (void (*) (void (*) (enum inferior_event_type, void*), void*))
826 de_fault (to_async_mask,
829 de_fault (to_thread_architecture,
830 default_thread_architecture);
831 current_target.to_read_description = NULL;
832 de_fault (to_get_ada_task_ptid,
833 (ptid_t (*) (long, long))
834 default_get_ada_task_ptid);
835 de_fault (to_supports_multi_process,
838 de_fault (to_trace_init,
841 de_fault (to_download_tracepoint,
842 (void (*) (struct breakpoint *))
844 de_fault (to_download_trace_state_variable,
845 (void (*) (struct trace_state_variable *))
847 de_fault (to_trace_set_readonly_regions,
850 de_fault (to_trace_start,
853 de_fault (to_get_trace_status,
854 (int (*) (struct trace_status *))
856 de_fault (to_trace_stop,
859 de_fault (to_trace_find,
860 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
862 de_fault (to_get_trace_state_variable_value,
863 (int (*) (int, LONGEST *))
865 de_fault (to_save_trace_data,
866 (int (*) (const char *))
868 de_fault (to_upload_tracepoints,
869 (int (*) (struct uploaded_tp **))
871 de_fault (to_upload_trace_state_variables,
872 (int (*) (struct uploaded_tsv **))
874 de_fault (to_get_raw_trace_data,
875 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
877 de_fault (to_set_disconnected_tracing,
880 de_fault (to_set_circular_trace_buffer,
883 de_fault (to_get_tib_address,
884 (int (*) (ptid_t, CORE_ADDR *))
886 de_fault (to_set_permissions,
889 de_fault (to_static_tracepoint_marker_at,
890 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
892 de_fault (to_static_tracepoint_markers_by_strid,
893 (VEC(static_tracepoint_marker_p) * (*) (const char *))
897 /* Finally, position the target-stack beneath the squashed
898 "current_target". That way code looking for a non-inherited
899 target method can quickly and simply find it. */
900 current_target.beneath = target_stack;
903 setup_target_debug ();
906 /* Push a new target type into the stack of the existing target accessors,
907 possibly superseding some of the existing accessors.
909 Rather than allow an empty stack, we always have the dummy target at
910 the bottom stratum, so we can call the function vectors without
914 push_target (struct target_ops *t)
916 struct target_ops **cur;
918 /* Check magic number. If wrong, it probably means someone changed
919 the struct definition, but not all the places that initialize one. */
920 if (t->to_magic != OPS_MAGIC)
922 fprintf_unfiltered (gdb_stderr,
923 "Magic number of %s target struct wrong\n",
925 internal_error (__FILE__, __LINE__,
926 _("failed internal consistency check"));
929 /* Find the proper stratum to install this target in. */
930 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
932 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
936 /* If there's already targets at this stratum, remove them. */
937 /* FIXME: cagney/2003-10-15: I think this should be popping all
938 targets to CUR, and not just those at this stratum level. */
939 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
941 /* There's already something at this stratum level. Close it,
942 and un-hook it from the stack. */
943 struct target_ops *tmp = (*cur);
945 (*cur) = (*cur)->beneath;
947 target_close (tmp, 0);
950 /* We have removed all targets in our stratum, now add the new one. */
954 update_current_target ();
957 /* Remove a target_ops vector from the stack, wherever it may be.
958 Return how many times it was removed (0 or 1). */
961 unpush_target (struct target_ops *t)
963 struct target_ops **cur;
964 struct target_ops *tmp;
966 if (t->to_stratum == dummy_stratum)
967 internal_error (__FILE__, __LINE__,
968 _("Attempt to unpush the dummy target"));
970 /* Look for the specified target. Note that we assume that a target
971 can only occur once in the target stack. */
973 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
980 return 0; /* Didn't find target_ops, quit now */
982 /* NOTE: cagney/2003-12-06: In '94 the close call was made
983 unconditional by moving it to before the above check that the
984 target was in the target stack (something about "Change the way
985 pushing and popping of targets work to support target overlays
986 and inheritance"). This doesn't make much sense - only open
987 targets should be closed. */
990 /* Unchain the target */
992 (*cur) = (*cur)->beneath;
995 update_current_target ();
1003 target_close (target_stack, 0); /* Let it clean up */
1004 if (unpush_target (target_stack) == 1)
1007 fprintf_unfiltered (gdb_stderr,
1008 "pop_target couldn't find target %s\n",
1009 current_target.to_shortname);
1010 internal_error (__FILE__, __LINE__,
1011 _("failed internal consistency check"));
1015 pop_all_targets_above (enum strata above_stratum, int quitting)
1017 while ((int) (current_target.to_stratum) > (int) above_stratum)
1019 target_close (target_stack, quitting);
1020 if (!unpush_target (target_stack))
1022 fprintf_unfiltered (gdb_stderr,
1023 "pop_all_targets couldn't find target %s\n",
1024 target_stack->to_shortname);
1025 internal_error (__FILE__, __LINE__,
1026 _("failed internal consistency check"));
1033 pop_all_targets (int quitting)
1035 pop_all_targets_above (dummy_stratum, quitting);
1038 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1041 target_is_pushed (struct target_ops *t)
1043 struct target_ops **cur;
1045 /* Check magic number. If wrong, it probably means someone changed
1046 the struct definition, but not all the places that initialize one. */
1047 if (t->to_magic != OPS_MAGIC)
1049 fprintf_unfiltered (gdb_stderr,
1050 "Magic number of %s target struct wrong\n",
1052 internal_error (__FILE__, __LINE__,
1053 _("failed internal consistency check"));
1056 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1063 /* Using the objfile specified in OBJFILE, find the address for the
1064 current thread's thread-local storage with offset OFFSET. */
1066 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1068 volatile CORE_ADDR addr = 0;
1069 struct target_ops *target;
1071 for (target = current_target.beneath;
1073 target = target->beneath)
1075 if (target->to_get_thread_local_address != NULL)
1080 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1082 ptid_t ptid = inferior_ptid;
1083 volatile struct gdb_exception ex;
1085 TRY_CATCH (ex, RETURN_MASK_ALL)
1089 /* Fetch the load module address for this objfile. */
1090 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1092 /* If it's 0, throw the appropriate exception. */
1094 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1095 _("TLS load module not found"));
1097 addr = target->to_get_thread_local_address (target, ptid,
1100 /* If an error occurred, print TLS related messages here. Otherwise,
1101 throw the error to some higher catcher. */
1104 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1108 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1109 error (_("Cannot find thread-local variables "
1110 "in this thread library."));
1112 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1113 if (objfile_is_library)
1114 error (_("Cannot find shared library `%s' in dynamic"
1115 " linker's load module list"), objfile->name);
1117 error (_("Cannot find executable file `%s' in dynamic"
1118 " linker's load module list"), objfile->name);
1120 case TLS_NOT_ALLOCATED_YET_ERROR:
1121 if (objfile_is_library)
1122 error (_("The inferior has not yet allocated storage for"
1123 " thread-local variables in\n"
1124 "the shared library `%s'\n"
1126 objfile->name, target_pid_to_str (ptid));
1128 error (_("The inferior has not yet allocated storage for"
1129 " thread-local variables in\n"
1130 "the executable `%s'\n"
1132 objfile->name, target_pid_to_str (ptid));
1134 case TLS_GENERIC_ERROR:
1135 if (objfile_is_library)
1136 error (_("Cannot find thread-local storage for %s, "
1137 "shared library %s:\n%s"),
1138 target_pid_to_str (ptid),
1139 objfile->name, ex.message);
1141 error (_("Cannot find thread-local storage for %s, "
1142 "executable file %s:\n%s"),
1143 target_pid_to_str (ptid),
1144 objfile->name, ex.message);
1147 throw_exception (ex);
1152 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1153 TLS is an ABI-specific thing. But we don't do that yet. */
1155 error (_("Cannot find thread-local variables on this target"));
1161 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1163 /* target_read_string -- read a null terminated string, up to LEN bytes,
1164 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1165 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1166 is responsible for freeing it. Return the number of bytes successfully
1170 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1172 int tlen, origlen, offset, i;
1176 int buffer_allocated;
1178 unsigned int nbytes_read = 0;
1180 gdb_assert (string);
1182 /* Small for testing. */
1183 buffer_allocated = 4;
1184 buffer = xmalloc (buffer_allocated);
1191 tlen = MIN (len, 4 - (memaddr & 3));
1192 offset = memaddr & 3;
1194 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1197 /* The transfer request might have crossed the boundary to an
1198 unallocated region of memory. Retry the transfer, requesting
1202 errcode = target_read_memory (memaddr, buf, 1);
1207 if (bufptr - buffer + tlen > buffer_allocated)
1211 bytes = bufptr - buffer;
1212 buffer_allocated *= 2;
1213 buffer = xrealloc (buffer, buffer_allocated);
1214 bufptr = buffer + bytes;
1217 for (i = 0; i < tlen; i++)
1219 *bufptr++ = buf[i + offset];
1220 if (buf[i + offset] == '\000')
1222 nbytes_read += i + 1;
1229 nbytes_read += tlen;
1238 struct target_section_table *
1239 target_get_section_table (struct target_ops *target)
1241 struct target_ops *t;
1244 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1246 for (t = target; t != NULL; t = t->beneath)
1247 if (t->to_get_section_table != NULL)
1248 return (*t->to_get_section_table) (t);
1253 /* Find a section containing ADDR. */
1255 struct target_section *
1256 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1258 struct target_section_table *table = target_get_section_table (target);
1259 struct target_section *secp;
1264 for (secp = table->sections; secp < table->sections_end; secp++)
1266 if (addr >= secp->addr && addr < secp->endaddr)
1272 /* Perform a partial memory transfer.
1273 For docs see target.h, to_xfer_partial. */
1276 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1277 void *readbuf, const void *writebuf, ULONGEST memaddr,
1282 struct mem_region *region;
1283 struct inferior *inf;
1285 /* Zero length requests are ok and require no work. */
1289 /* For accesses to unmapped overlay sections, read directly from
1290 files. Must do this first, as MEMADDR may need adjustment. */
1291 if (readbuf != NULL && overlay_debugging)
1293 struct obj_section *section = find_pc_overlay (memaddr);
1295 if (pc_in_unmapped_range (memaddr, section))
1297 struct target_section_table *table
1298 = target_get_section_table (ops);
1299 const char *section_name = section->the_bfd_section->name;
1301 memaddr = overlay_mapped_address (memaddr, section);
1302 return section_table_xfer_memory_partial (readbuf, writebuf,
1305 table->sections_end,
1310 /* Try the executable files, if "trust-readonly-sections" is set. */
1311 if (readbuf != NULL && trust_readonly)
1313 struct target_section *secp;
1314 struct target_section_table *table;
1316 secp = target_section_by_addr (ops, memaddr);
1318 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1321 table = target_get_section_table (ops);
1322 return section_table_xfer_memory_partial (readbuf, writebuf,
1325 table->sections_end,
1330 /* Try GDB's internal data cache. */
1331 region = lookup_mem_region (memaddr);
1332 /* region->hi == 0 means there's no upper bound. */
1333 if (memaddr + len < region->hi || region->hi == 0)
1336 reg_len = region->hi - memaddr;
1338 switch (region->attrib.mode)
1341 if (writebuf != NULL)
1346 if (readbuf != NULL)
1351 /* We only support writing to flash during "load" for now. */
1352 if (writebuf != NULL)
1353 error (_("Writing to flash memory forbidden in this context"));
1360 if (!ptid_equal (inferior_ptid, null_ptid))
1361 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1366 /* The dcache reads whole cache lines; that doesn't play well
1367 with reading from a trace buffer, because reading outside of
1368 the collected memory range fails. */
1369 && get_traceframe_number () == -1
1370 && (region->attrib.cache
1371 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1373 if (readbuf != NULL)
1374 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1377 /* FIXME drow/2006-08-09: If we're going to preserve const
1378 correctness dcache_xfer_memory should take readbuf and
1380 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1387 if (readbuf && !show_memory_breakpoints)
1388 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1393 /* If none of those methods found the memory we wanted, fall back
1394 to a target partial transfer. Normally a single call to
1395 to_xfer_partial is enough; if it doesn't recognize an object
1396 it will call the to_xfer_partial of the next target down.
1397 But for memory this won't do. Memory is the only target
1398 object which can be read from more than one valid target.
1399 A core file, for instance, could have some of memory but
1400 delegate other bits to the target below it. So, we must
1401 manually try all targets. */
1405 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1406 readbuf, writebuf, memaddr, reg_len);
1410 /* We want to continue past core files to executables, but not
1411 past a running target's memory. */
1412 if (ops->to_has_all_memory (ops))
1417 while (ops != NULL);
1419 if (readbuf && !show_memory_breakpoints)
1420 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1422 /* Make sure the cache gets updated no matter what - if we are writing
1423 to the stack. Even if this write is not tagged as such, we still need
1424 to update the cache. */
1429 && !region->attrib.cache
1430 && stack_cache_enabled_p
1431 && object != TARGET_OBJECT_STACK_MEMORY)
1433 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1436 /* If we still haven't got anything, return the last error. We
1442 restore_show_memory_breakpoints (void *arg)
1444 show_memory_breakpoints = (uintptr_t) arg;
1448 make_show_memory_breakpoints_cleanup (int show)
1450 int current = show_memory_breakpoints;
1452 show_memory_breakpoints = show;
1453 return make_cleanup (restore_show_memory_breakpoints,
1454 (void *) (uintptr_t) current);
1457 /* For docs see target.h, to_xfer_partial. */
1460 target_xfer_partial (struct target_ops *ops,
1461 enum target_object object, const char *annex,
1462 void *readbuf, const void *writebuf,
1463 ULONGEST offset, LONGEST len)
1467 gdb_assert (ops->to_xfer_partial != NULL);
1469 if (writebuf && !may_write_memory)
1470 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1471 core_addr_to_string_nz (offset), plongest (len));
1473 /* If this is a memory transfer, let the memory-specific code
1474 have a look at it instead. Memory transfers are more
1476 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1477 retval = memory_xfer_partial (ops, object, readbuf,
1478 writebuf, offset, len);
1481 enum target_object raw_object = object;
1483 /* If this is a raw memory transfer, request the normal
1484 memory object from other layers. */
1485 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1486 raw_object = TARGET_OBJECT_MEMORY;
1488 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1489 writebuf, offset, len);
1494 const unsigned char *myaddr = NULL;
1496 fprintf_unfiltered (gdb_stdlog,
1497 "%s:target_xfer_partial "
1498 "(%d, %s, %s, %s, %s, %s) = %s",
1501 (annex ? annex : "(null)"),
1502 host_address_to_string (readbuf),
1503 host_address_to_string (writebuf),
1504 core_addr_to_string_nz (offset),
1505 plongest (len), plongest (retval));
1511 if (retval > 0 && myaddr != NULL)
1515 fputs_unfiltered (", bytes =", gdb_stdlog);
1516 for (i = 0; i < retval; i++)
1518 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1520 if (targetdebug < 2 && i > 0)
1522 fprintf_unfiltered (gdb_stdlog, " ...");
1525 fprintf_unfiltered (gdb_stdlog, "\n");
1528 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1532 fputc_unfiltered ('\n', gdb_stdlog);
1537 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1538 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1539 if any error occurs.
1541 If an error occurs, no guarantee is made about the contents of the data at
1542 MYADDR. In particular, the caller should not depend upon partial reads
1543 filling the buffer with good data. There is no way for the caller to know
1544 how much good data might have been transfered anyway. Callers that can
1545 deal with partial reads should call target_read (which will retry until
1546 it makes no progress, and then return how much was transferred). */
1549 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1551 /* Dispatch to the topmost target, not the flattened current_target.
1552 Memory accesses check target->to_has_(all_)memory, and the
1553 flattened target doesn't inherit those. */
1554 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1555 myaddr, memaddr, len) == len)
1561 /* Like target_read_memory, but specify explicitly that this is a read from
1562 the target's stack. This may trigger different cache behavior. */
1565 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1567 /* Dispatch to the topmost target, not the flattened current_target.
1568 Memory accesses check target->to_has_(all_)memory, and the
1569 flattened target doesn't inherit those. */
1571 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1572 myaddr, memaddr, len) == len)
1578 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1579 Returns either 0 for success or an errno value if any error occurs.
1580 If an error occurs, no guarantee is made about how much data got written.
1581 Callers that can deal with partial writes should call target_write. */
1584 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1586 /* Dispatch to the topmost target, not the flattened current_target.
1587 Memory accesses check target->to_has_(all_)memory, and the
1588 flattened target doesn't inherit those. */
1589 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1590 myaddr, memaddr, len) == len)
1596 /* Fetch the target's memory map. */
1599 target_memory_map (void)
1601 VEC(mem_region_s) *result;
1602 struct mem_region *last_one, *this_one;
1604 struct target_ops *t;
1607 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1609 for (t = current_target.beneath; t != NULL; t = t->beneath)
1610 if (t->to_memory_map != NULL)
1616 result = t->to_memory_map (t);
1620 qsort (VEC_address (mem_region_s, result),
1621 VEC_length (mem_region_s, result),
1622 sizeof (struct mem_region), mem_region_cmp);
1624 /* Check that regions do not overlap. Simultaneously assign
1625 a numbering for the "mem" commands to use to refer to
1628 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1630 this_one->number = ix;
1632 if (last_one && last_one->hi > this_one->lo)
1634 warning (_("Overlapping regions in memory map: ignoring"));
1635 VEC_free (mem_region_s, result);
1638 last_one = this_one;
1645 target_flash_erase (ULONGEST address, LONGEST length)
1647 struct target_ops *t;
1649 for (t = current_target.beneath; t != NULL; t = t->beneath)
1650 if (t->to_flash_erase != NULL)
1653 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1654 hex_string (address), phex (length, 0));
1655 t->to_flash_erase (t, address, length);
1663 target_flash_done (void)
1665 struct target_ops *t;
1667 for (t = current_target.beneath; t != NULL; t = t->beneath)
1668 if (t->to_flash_done != NULL)
1671 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1672 t->to_flash_done (t);
1680 show_trust_readonly (struct ui_file *file, int from_tty,
1681 struct cmd_list_element *c, const char *value)
1683 fprintf_filtered (file,
1684 _("Mode for reading from readonly sections is %s.\n"),
1688 /* More generic transfers. */
1691 default_xfer_partial (struct target_ops *ops, enum target_object object,
1692 const char *annex, gdb_byte *readbuf,
1693 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1695 if (object == TARGET_OBJECT_MEMORY
1696 && ops->deprecated_xfer_memory != NULL)
1697 /* If available, fall back to the target's
1698 "deprecated_xfer_memory" method. */
1703 if (writebuf != NULL)
1705 void *buffer = xmalloc (len);
1706 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1708 memcpy (buffer, writebuf, len);
1709 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1710 1/*write*/, NULL, ops);
1711 do_cleanups (cleanup);
1713 if (readbuf != NULL)
1714 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1715 0/*read*/, NULL, ops);
1718 else if (xfered == 0 && errno == 0)
1719 /* "deprecated_xfer_memory" uses 0, cross checked against
1720 ERRNO as one indication of an error. */
1725 else if (ops->beneath != NULL)
1726 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1727 readbuf, writebuf, offset, len);
1732 /* The xfer_partial handler for the topmost target. Unlike the default,
1733 it does not need to handle memory specially; it just passes all
1734 requests down the stack. */
1737 current_xfer_partial (struct target_ops *ops, enum target_object object,
1738 const char *annex, gdb_byte *readbuf,
1739 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1741 if (ops->beneath != NULL)
1742 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1743 readbuf, writebuf, offset, len);
1748 /* Target vector read/write partial wrapper functions. */
1751 target_read_partial (struct target_ops *ops,
1752 enum target_object object,
1753 const char *annex, gdb_byte *buf,
1754 ULONGEST offset, LONGEST len)
1756 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1760 target_write_partial (struct target_ops *ops,
1761 enum target_object object,
1762 const char *annex, const gdb_byte *buf,
1763 ULONGEST offset, LONGEST len)
1765 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1768 /* Wrappers to perform the full transfer. */
1770 /* For docs on target_read see target.h. */
1773 target_read (struct target_ops *ops,
1774 enum target_object object,
1775 const char *annex, gdb_byte *buf,
1776 ULONGEST offset, LONGEST len)
1780 while (xfered < len)
1782 LONGEST xfer = target_read_partial (ops, object, annex,
1783 (gdb_byte *) buf + xfered,
1784 offset + xfered, len - xfered);
1786 /* Call an observer, notifying them of the xfer progress? */
1797 /** Assuming that the entire [begin, end) range of memory cannot be read,
1798 try to read whatever subrange is possible to read.
1800 The function results, in RESULT, either zero or one memory block.
1801 If there's a readable subrange at the beginning, it is completely
1802 read and returned. Any further readable subrange will not be read.
1803 Otherwise, if there's a readable subrange at the end, it will be
1804 completely read and returned. Any readable subranges before it (obviously,
1805 not starting at the beginning), will be ignored. In other cases --
1806 either no readable subrange, or readable subrange (s) that is neither
1807 at the beginning, or end, nothing is returned.
1809 The purpose of this function is to handle a read across a boundary of
1810 accessible memory in a case when memory map is not available. The above
1811 restrictions are fine for this case, but will give incorrect results if
1812 the memory is 'patchy'. However, supporting 'patchy' memory would require
1813 trying to read every single byte, and it seems unacceptable solution.
1814 Explicit memory map is recommended for this case -- and
1815 target_read_memory_robust will take care of reading multiple ranges
1819 read_whatever_is_readable (struct target_ops *ops,
1820 ULONGEST begin, ULONGEST end,
1821 VEC(memory_read_result_s) **result)
1823 gdb_byte *buf = xmalloc (end-begin);
1824 ULONGEST current_begin = begin;
1825 ULONGEST current_end = end;
1827 memory_read_result_s r;
1829 /* If we previously failed to read 1 byte, nothing can be done here. */
1830 if (end - begin <= 1)
1833 /* Check that either first or the last byte is readable, and give up
1834 if not. This heuristic is meant to permit reading accessible memory
1835 at the boundary of accessible region. */
1836 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1837 buf, begin, 1) == 1)
1842 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1843 buf + (end-begin) - 1, end - 1, 1) == 1)
1853 /* Loop invariant is that the [current_begin, current_end) was previously
1854 found to be not readable as a whole.
1856 Note loop condition -- if the range has 1 byte, we can't divide the range
1857 so there's no point trying further. */
1858 while (current_end - current_begin > 1)
1860 ULONGEST first_half_begin, first_half_end;
1861 ULONGEST second_half_begin, second_half_end;
1864 ULONGEST middle = current_begin + (current_end - current_begin)/2;
1867 first_half_begin = current_begin;
1868 first_half_end = middle;
1869 second_half_begin = middle;
1870 second_half_end = current_end;
1874 first_half_begin = middle;
1875 first_half_end = current_end;
1876 second_half_begin = current_begin;
1877 second_half_end = middle;
1880 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1881 buf + (first_half_begin - begin),
1883 first_half_end - first_half_begin);
1885 if (xfer == first_half_end - first_half_begin)
1887 /* This half reads up fine. So, the error must be in the
1889 current_begin = second_half_begin;
1890 current_end = second_half_end;
1894 /* This half is not readable. Because we've tried one byte, we
1895 know some part of this half if actually redable. Go to the next
1896 iteration to divide again and try to read.
1898 We don't handle the other half, because this function only tries
1899 to read a single readable subrange. */
1900 current_begin = first_half_begin;
1901 current_end = first_half_end;
1907 /* The [begin, current_begin) range has been read. */
1909 r.end = current_begin;
1914 /* The [current_end, end) range has been read. */
1915 LONGEST rlen = end - current_end;
1916 r.data = xmalloc (rlen);
1917 memcpy (r.data, buf + current_end - begin, rlen);
1918 r.begin = current_end;
1922 VEC_safe_push(memory_read_result_s, (*result), &r);
1926 free_memory_read_result_vector (void *x)
1928 VEC(memory_read_result_s) *v = x;
1929 memory_read_result_s *current;
1932 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
1934 xfree (current->data);
1936 VEC_free (memory_read_result_s, v);
1939 VEC(memory_read_result_s) *
1940 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
1942 VEC(memory_read_result_s) *result = 0;
1945 while (xfered < len)
1947 struct mem_region *region = lookup_mem_region (offset + xfered);
1950 /* If there is no explicit region, a fake one should be created. */
1951 gdb_assert (region);
1953 if (region->hi == 0)
1954 rlen = len - xfered;
1956 rlen = region->hi - offset;
1958 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1960 /* Cannot read this region. Note that we can end up here only
1961 if the region is explicitly marked inaccessible, or
1962 'inaccessible-by-default' is in effect. */
1967 LONGEST to_read = min (len - xfered, rlen);
1968 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
1970 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1971 (gdb_byte *) buffer,
1972 offset + xfered, to_read);
1973 /* Call an observer, notifying them of the xfer progress? */
1976 /* Got an error reading full chunk. See if maybe we can read
1979 read_whatever_is_readable (ops, offset + xfered,
1980 offset + xfered + to_read, &result);
1985 struct memory_read_result r;
1987 r.begin = offset + xfered;
1988 r.end = r.begin + xfer;
1989 VEC_safe_push (memory_read_result_s, result, &r);
1999 /* An alternative to target_write with progress callbacks. */
2002 target_write_with_progress (struct target_ops *ops,
2003 enum target_object object,
2004 const char *annex, const gdb_byte *buf,
2005 ULONGEST offset, LONGEST len,
2006 void (*progress) (ULONGEST, void *), void *baton)
2010 /* Give the progress callback a chance to set up. */
2012 (*progress) (0, baton);
2014 while (xfered < len)
2016 LONGEST xfer = target_write_partial (ops, object, annex,
2017 (gdb_byte *) buf + xfered,
2018 offset + xfered, len - xfered);
2026 (*progress) (xfer, baton);
2034 /* For docs on target_write see target.h. */
2037 target_write (struct target_ops *ops,
2038 enum target_object object,
2039 const char *annex, const gdb_byte *buf,
2040 ULONGEST offset, LONGEST len)
2042 return target_write_with_progress (ops, object, annex, buf, offset, len,
2046 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2047 the size of the transferred data. PADDING additional bytes are
2048 available in *BUF_P. This is a helper function for
2049 target_read_alloc; see the declaration of that function for more
2053 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2054 const char *annex, gdb_byte **buf_p, int padding)
2056 size_t buf_alloc, buf_pos;
2060 /* This function does not have a length parameter; it reads the
2061 entire OBJECT). Also, it doesn't support objects fetched partly
2062 from one target and partly from another (in a different stratum,
2063 e.g. a core file and an executable). Both reasons make it
2064 unsuitable for reading memory. */
2065 gdb_assert (object != TARGET_OBJECT_MEMORY);
2067 /* Start by reading up to 4K at a time. The target will throttle
2068 this number down if necessary. */
2070 buf = xmalloc (buf_alloc);
2074 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2075 buf_pos, buf_alloc - buf_pos - padding);
2078 /* An error occurred. */
2084 /* Read all there was. */
2094 /* If the buffer is filling up, expand it. */
2095 if (buf_alloc < buf_pos * 2)
2098 buf = xrealloc (buf, buf_alloc);
2105 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2106 the size of the transferred data. See the declaration in "target.h"
2107 function for more information about the return value. */
2110 target_read_alloc (struct target_ops *ops, enum target_object object,
2111 const char *annex, gdb_byte **buf_p)
2113 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2116 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2117 returned as a string, allocated using xmalloc. If an error occurs
2118 or the transfer is unsupported, NULL is returned. Empty objects
2119 are returned as allocated but empty strings. A warning is issued
2120 if the result contains any embedded NUL bytes. */
2123 target_read_stralloc (struct target_ops *ops, enum target_object object,
2127 LONGEST transferred;
2129 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2131 if (transferred < 0)
2134 if (transferred == 0)
2135 return xstrdup ("");
2137 buffer[transferred] = 0;
2138 if (strlen (buffer) < transferred)
2139 warning (_("target object %d, annex %s, "
2140 "contained unexpected null characters"),
2141 (int) object, annex ? annex : "(none)");
2143 return (char *) buffer;
2146 /* Memory transfer methods. */
2149 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2152 /* This method is used to read from an alternate, non-current
2153 target. This read must bypass the overlay support (as symbols
2154 don't match this target), and GDB's internal cache (wrong cache
2155 for this target). */
2156 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2158 memory_error (EIO, addr);
2162 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2163 int len, enum bfd_endian byte_order)
2165 gdb_byte buf[sizeof (ULONGEST)];
2167 gdb_assert (len <= sizeof (buf));
2168 get_target_memory (ops, addr, buf, len);
2169 return extract_unsigned_integer (buf, len, byte_order);
2173 target_insert_breakpoint (struct gdbarch *gdbarch,
2174 struct bp_target_info *bp_tgt)
2176 if (!may_insert_breakpoints)
2178 warning (_("May not insert breakpoints"));
2182 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2186 target_remove_breakpoint (struct gdbarch *gdbarch,
2187 struct bp_target_info *bp_tgt)
2189 /* This is kind of a weird case to handle, but the permission might
2190 have been changed after breakpoints were inserted - in which case
2191 we should just take the user literally and assume that any
2192 breakpoints should be left in place. */
2193 if (!may_insert_breakpoints)
2195 warning (_("May not remove breakpoints"));
2199 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2203 target_info (char *args, int from_tty)
2205 struct target_ops *t;
2206 int has_all_mem = 0;
2208 if (symfile_objfile != NULL)
2209 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2211 for (t = target_stack; t != NULL; t = t->beneath)
2213 if (!(*t->to_has_memory) (t))
2216 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2219 printf_unfiltered (_("\tWhile running this, "
2220 "GDB does not access memory from...\n"));
2221 printf_unfiltered ("%s:\n", t->to_longname);
2222 (t->to_files_info) (t);
2223 has_all_mem = (*t->to_has_all_memory) (t);
2227 /* This function is called before any new inferior is created, e.g.
2228 by running a program, attaching, or connecting to a target.
2229 It cleans up any state from previous invocations which might
2230 change between runs. This is a subset of what target_preopen
2231 resets (things which might change between targets). */
2234 target_pre_inferior (int from_tty)
2236 /* Clear out solib state. Otherwise the solib state of the previous
2237 inferior might have survived and is entirely wrong for the new
2238 target. This has been observed on GNU/Linux using glibc 2.3. How
2250 Cannot access memory at address 0xdeadbeef
2253 /* In some OSs, the shared library list is the same/global/shared
2254 across inferiors. If code is shared between processes, so are
2255 memory regions and features. */
2256 if (!gdbarch_has_global_solist (target_gdbarch))
2258 no_shared_libraries (NULL, from_tty);
2260 invalidate_target_mem_regions ();
2262 target_clear_description ();
2266 /* Callback for iterate_over_inferiors. Gets rid of the given
2270 dispose_inferior (struct inferior *inf, void *args)
2272 struct thread_info *thread;
2274 thread = any_thread_of_process (inf->pid);
2277 switch_to_thread (thread->ptid);
2279 /* Core inferiors actually should be detached, not killed. */
2280 if (target_has_execution)
2283 target_detach (NULL, 0);
2289 /* This is to be called by the open routine before it does
2293 target_preopen (int from_tty)
2297 if (have_inferiors ())
2300 || !have_live_inferiors ()
2301 || query (_("A program is being debugged already. Kill it? ")))
2302 iterate_over_inferiors (dispose_inferior, NULL);
2304 error (_("Program not killed."));
2307 /* Calling target_kill may remove the target from the stack. But if
2308 it doesn't (which seems like a win for UDI), remove it now. */
2309 /* Leave the exec target, though. The user may be switching from a
2310 live process to a core of the same program. */
2311 pop_all_targets_above (file_stratum, 0);
2313 target_pre_inferior (from_tty);
2316 /* Detach a target after doing deferred register stores. */
2319 target_detach (char *args, int from_tty)
2321 struct target_ops* t;
2323 if (gdbarch_has_global_breakpoints (target_gdbarch))
2324 /* Don't remove global breakpoints here. They're removed on
2325 disconnection from the target. */
2328 /* If we're in breakpoints-always-inserted mode, have to remove
2329 them before detaching. */
2330 remove_breakpoints_pid (PIDGET (inferior_ptid));
2332 prepare_for_detach ();
2334 for (t = current_target.beneath; t != NULL; t = t->beneath)
2336 if (t->to_detach != NULL)
2338 t->to_detach (t, args, from_tty);
2340 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2346 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2350 target_disconnect (char *args, int from_tty)
2352 struct target_ops *t;
2354 /* If we're in breakpoints-always-inserted mode or if breakpoints
2355 are global across processes, we have to remove them before
2357 remove_breakpoints ();
2359 for (t = current_target.beneath; t != NULL; t = t->beneath)
2360 if (t->to_disconnect != NULL)
2363 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2365 t->to_disconnect (t, args, from_tty);
2373 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2375 struct target_ops *t;
2377 for (t = current_target.beneath; t != NULL; t = t->beneath)
2379 if (t->to_wait != NULL)
2381 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2385 char *status_string;
2387 status_string = target_waitstatus_to_string (status);
2388 fprintf_unfiltered (gdb_stdlog,
2389 "target_wait (%d, status) = %d, %s\n",
2390 PIDGET (ptid), PIDGET (retval),
2392 xfree (status_string);
2403 target_pid_to_str (ptid_t ptid)
2405 struct target_ops *t;
2407 for (t = current_target.beneath; t != NULL; t = t->beneath)
2409 if (t->to_pid_to_str != NULL)
2410 return (*t->to_pid_to_str) (t, ptid);
2413 return normal_pid_to_str (ptid);
2417 target_resume (ptid_t ptid, int step, enum target_signal signal)
2419 struct target_ops *t;
2421 target_dcache_invalidate ();
2423 for (t = current_target.beneath; t != NULL; t = t->beneath)
2425 if (t->to_resume != NULL)
2427 t->to_resume (t, ptid, step, signal);
2429 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2431 step ? "step" : "continue",
2432 target_signal_to_name (signal));
2434 registers_changed_ptid (ptid);
2435 set_executing (ptid, 1);
2436 set_running (ptid, 1);
2437 clear_inline_frame_state (ptid);
2444 /* Look through the list of possible targets for a target that can
2448 target_follow_fork (int follow_child)
2450 struct target_ops *t;
2452 for (t = current_target.beneath; t != NULL; t = t->beneath)
2454 if (t->to_follow_fork != NULL)
2456 int retval = t->to_follow_fork (t, follow_child);
2459 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2460 follow_child, retval);
2465 /* Some target returned a fork event, but did not know how to follow it. */
2466 internal_error (__FILE__, __LINE__,
2467 _("could not find a target to follow fork"));
2471 target_mourn_inferior (void)
2473 struct target_ops *t;
2475 for (t = current_target.beneath; t != NULL; t = t->beneath)
2477 if (t->to_mourn_inferior != NULL)
2479 t->to_mourn_inferior (t);
2481 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2483 /* We no longer need to keep handles on any of the object files.
2484 Make sure to release them to avoid unnecessarily locking any
2485 of them while we're not actually debugging. */
2486 bfd_cache_close_all ();
2492 internal_error (__FILE__, __LINE__,
2493 _("could not find a target to follow mourn inferior"));
2496 /* Look for a target which can describe architectural features, starting
2497 from TARGET. If we find one, return its description. */
2499 const struct target_desc *
2500 target_read_description (struct target_ops *target)
2502 struct target_ops *t;
2504 for (t = target; t != NULL; t = t->beneath)
2505 if (t->to_read_description != NULL)
2507 const struct target_desc *tdesc;
2509 tdesc = t->to_read_description (t);
2517 /* The default implementation of to_search_memory.
2518 This implements a basic search of memory, reading target memory and
2519 performing the search here (as opposed to performing the search in on the
2520 target side with, for example, gdbserver). */
2523 simple_search_memory (struct target_ops *ops,
2524 CORE_ADDR start_addr, ULONGEST search_space_len,
2525 const gdb_byte *pattern, ULONGEST pattern_len,
2526 CORE_ADDR *found_addrp)
2528 /* NOTE: also defined in find.c testcase. */
2529 #define SEARCH_CHUNK_SIZE 16000
2530 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2531 /* Buffer to hold memory contents for searching. */
2532 gdb_byte *search_buf;
2533 unsigned search_buf_size;
2534 struct cleanup *old_cleanups;
2536 search_buf_size = chunk_size + pattern_len - 1;
2538 /* No point in trying to allocate a buffer larger than the search space. */
2539 if (search_space_len < search_buf_size)
2540 search_buf_size = search_space_len;
2542 search_buf = malloc (search_buf_size);
2543 if (search_buf == NULL)
2544 error (_("Unable to allocate memory to perform the search."));
2545 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2547 /* Prime the search buffer. */
2549 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2550 search_buf, start_addr, search_buf_size) != search_buf_size)
2552 warning (_("Unable to access target memory at %s, halting search."),
2553 hex_string (start_addr));
2554 do_cleanups (old_cleanups);
2558 /* Perform the search.
2560 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2561 When we've scanned N bytes we copy the trailing bytes to the start and
2562 read in another N bytes. */
2564 while (search_space_len >= pattern_len)
2566 gdb_byte *found_ptr;
2567 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2569 found_ptr = memmem (search_buf, nr_search_bytes,
2570 pattern, pattern_len);
2572 if (found_ptr != NULL)
2574 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2576 *found_addrp = found_addr;
2577 do_cleanups (old_cleanups);
2581 /* Not found in this chunk, skip to next chunk. */
2583 /* Don't let search_space_len wrap here, it's unsigned. */
2584 if (search_space_len >= chunk_size)
2585 search_space_len -= chunk_size;
2587 search_space_len = 0;
2589 if (search_space_len >= pattern_len)
2591 unsigned keep_len = search_buf_size - chunk_size;
2592 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2595 /* Copy the trailing part of the previous iteration to the front
2596 of the buffer for the next iteration. */
2597 gdb_assert (keep_len == pattern_len - 1);
2598 memcpy (search_buf, search_buf + chunk_size, keep_len);
2600 nr_to_read = min (search_space_len - keep_len, chunk_size);
2602 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2603 search_buf + keep_len, read_addr,
2604 nr_to_read) != nr_to_read)
2606 warning (_("Unable to access target "
2607 "memory at %s, halting search."),
2608 hex_string (read_addr));
2609 do_cleanups (old_cleanups);
2613 start_addr += chunk_size;
2619 do_cleanups (old_cleanups);
2623 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2624 sequence of bytes in PATTERN with length PATTERN_LEN.
2626 The result is 1 if found, 0 if not found, and -1 if there was an error
2627 requiring halting of the search (e.g. memory read error).
2628 If the pattern is found the address is recorded in FOUND_ADDRP. */
2631 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2632 const gdb_byte *pattern, ULONGEST pattern_len,
2633 CORE_ADDR *found_addrp)
2635 struct target_ops *t;
2638 /* We don't use INHERIT to set current_target.to_search_memory,
2639 so we have to scan the target stack and handle targetdebug
2643 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2644 hex_string (start_addr));
2646 for (t = current_target.beneath; t != NULL; t = t->beneath)
2647 if (t->to_search_memory != NULL)
2652 found = t->to_search_memory (t, start_addr, search_space_len,
2653 pattern, pattern_len, found_addrp);
2657 /* If a special version of to_search_memory isn't available, use the
2659 found = simple_search_memory (current_target.beneath,
2660 start_addr, search_space_len,
2661 pattern, pattern_len, found_addrp);
2665 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2670 /* Look through the currently pushed targets. If none of them will
2671 be able to restart the currently running process, issue an error
2675 target_require_runnable (void)
2677 struct target_ops *t;
2679 for (t = target_stack; t != NULL; t = t->beneath)
2681 /* If this target knows how to create a new program, then
2682 assume we will still be able to after killing the current
2683 one. Either killing and mourning will not pop T, or else
2684 find_default_run_target will find it again. */
2685 if (t->to_create_inferior != NULL)
2688 /* Do not worry about thread_stratum targets that can not
2689 create inferiors. Assume they will be pushed again if
2690 necessary, and continue to the process_stratum. */
2691 if (t->to_stratum == thread_stratum
2692 || t->to_stratum == arch_stratum)
2695 error (_("The \"%s\" target does not support \"run\". "
2696 "Try \"help target\" or \"continue\"."),
2700 /* This function is only called if the target is running. In that
2701 case there should have been a process_stratum target and it
2702 should either know how to create inferiors, or not... */
2703 internal_error (__FILE__, __LINE__, _("No targets found"));
2706 /* Look through the list of possible targets for a target that can
2707 execute a run or attach command without any other data. This is
2708 used to locate the default process stratum.
2710 If DO_MESG is not NULL, the result is always valid (error() is
2711 called for errors); else, return NULL on error. */
2713 static struct target_ops *
2714 find_default_run_target (char *do_mesg)
2716 struct target_ops **t;
2717 struct target_ops *runable = NULL;
2722 for (t = target_structs; t < target_structs + target_struct_size;
2725 if ((*t)->to_can_run && target_can_run (*t))
2735 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2744 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2746 struct target_ops *t;
2748 t = find_default_run_target ("attach");
2749 (t->to_attach) (t, args, from_tty);
2754 find_default_create_inferior (struct target_ops *ops,
2755 char *exec_file, char *allargs, char **env,
2758 struct target_ops *t;
2760 t = find_default_run_target ("run");
2761 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2766 find_default_can_async_p (void)
2768 struct target_ops *t;
2770 /* This may be called before the target is pushed on the stack;
2771 look for the default process stratum. If there's none, gdb isn't
2772 configured with a native debugger, and target remote isn't
2774 t = find_default_run_target (NULL);
2775 if (t && t->to_can_async_p)
2776 return (t->to_can_async_p) ();
2781 find_default_is_async_p (void)
2783 struct target_ops *t;
2785 /* This may be called before the target is pushed on the stack;
2786 look for the default process stratum. If there's none, gdb isn't
2787 configured with a native debugger, and target remote isn't
2789 t = find_default_run_target (NULL);
2790 if (t && t->to_is_async_p)
2791 return (t->to_is_async_p) ();
2796 find_default_supports_non_stop (void)
2798 struct target_ops *t;
2800 t = find_default_run_target (NULL);
2801 if (t && t->to_supports_non_stop)
2802 return (t->to_supports_non_stop) ();
2807 target_supports_non_stop (void)
2809 struct target_ops *t;
2811 for (t = ¤t_target; t != NULL; t = t->beneath)
2812 if (t->to_supports_non_stop)
2813 return t->to_supports_non_stop ();
2820 target_get_osdata (const char *type)
2822 struct target_ops *t;
2824 /* If we're already connected to something that can get us OS
2825 related data, use it. Otherwise, try using the native
2827 if (current_target.to_stratum >= process_stratum)
2828 t = current_target.beneath;
2830 t = find_default_run_target ("get OS data");
2835 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2838 /* Determine the current address space of thread PTID. */
2840 struct address_space *
2841 target_thread_address_space (ptid_t ptid)
2843 struct address_space *aspace;
2844 struct inferior *inf;
2845 struct target_ops *t;
2847 for (t = current_target.beneath; t != NULL; t = t->beneath)
2849 if (t->to_thread_address_space != NULL)
2851 aspace = t->to_thread_address_space (t, ptid);
2852 gdb_assert (aspace);
2855 fprintf_unfiltered (gdb_stdlog,
2856 "target_thread_address_space (%s) = %d\n",
2857 target_pid_to_str (ptid),
2858 address_space_num (aspace));
2863 /* Fall-back to the "main" address space of the inferior. */
2864 inf = find_inferior_pid (ptid_get_pid (ptid));
2866 if (inf == NULL || inf->aspace == NULL)
2867 internal_error (__FILE__, __LINE__,
2868 _("Can't determine the current "
2869 "address space of thread %s\n"),
2870 target_pid_to_str (ptid));
2876 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2878 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
2882 default_watchpoint_addr_within_range (struct target_ops *target,
2884 CORE_ADDR start, int length)
2886 return addr >= start && addr < start + length;
2889 static struct gdbarch *
2890 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
2892 return target_gdbarch;
2908 return_minus_one (void)
2913 /* Find a single runnable target in the stack and return it. If for
2914 some reason there is more than one, return NULL. */
2917 find_run_target (void)
2919 struct target_ops **t;
2920 struct target_ops *runable = NULL;
2925 for (t = target_structs; t < target_structs + target_struct_size; ++t)
2927 if ((*t)->to_can_run && target_can_run (*t))
2934 return (count == 1 ? runable : NULL);
2938 * Find the next target down the stack from the specified target.
2942 find_target_beneath (struct target_ops *t)
2948 /* The inferior process has died. Long live the inferior! */
2951 generic_mourn_inferior (void)
2955 ptid = inferior_ptid;
2956 inferior_ptid = null_ptid;
2958 if (!ptid_equal (ptid, null_ptid))
2960 int pid = ptid_get_pid (ptid);
2961 exit_inferior (pid);
2964 breakpoint_init_inferior (inf_exited);
2965 registers_changed ();
2967 reopen_exec_file ();
2968 reinit_frame_cache ();
2970 if (deprecated_detach_hook)
2971 deprecated_detach_hook ();
2974 /* Helper function for child_wait and the derivatives of child_wait.
2975 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
2976 translation of that in OURSTATUS. */
2978 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
2980 if (WIFEXITED (hoststatus))
2982 ourstatus->kind = TARGET_WAITKIND_EXITED;
2983 ourstatus->value.integer = WEXITSTATUS (hoststatus);
2985 else if (!WIFSTOPPED (hoststatus))
2987 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2988 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
2992 ourstatus->kind = TARGET_WAITKIND_STOPPED;
2993 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
2997 /* Convert a normal process ID to a string. Returns the string in a
3001 normal_pid_to_str (ptid_t ptid)
3003 static char buf[32];
3005 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3010 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3012 return normal_pid_to_str (ptid);
3015 /* Error-catcher for target_find_memory_regions. */
3017 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3019 error (_("Command not implemented for this target."));
3023 /* Error-catcher for target_make_corefile_notes. */
3025 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3027 error (_("Command not implemented for this target."));
3031 /* Error-catcher for target_get_bookmark. */
3033 dummy_get_bookmark (char *ignore1, int ignore2)
3039 /* Error-catcher for target_goto_bookmark. */
3041 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3046 /* Set up the handful of non-empty slots needed by the dummy target
3050 init_dummy_target (void)
3052 dummy_target.to_shortname = "None";
3053 dummy_target.to_longname = "None";
3054 dummy_target.to_doc = "";
3055 dummy_target.to_attach = find_default_attach;
3056 dummy_target.to_detach =
3057 (void (*)(struct target_ops *, char *, int))target_ignore;
3058 dummy_target.to_create_inferior = find_default_create_inferior;
3059 dummy_target.to_can_async_p = find_default_can_async_p;
3060 dummy_target.to_is_async_p = find_default_is_async_p;
3061 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3062 dummy_target.to_pid_to_str = dummy_pid_to_str;
3063 dummy_target.to_stratum = dummy_stratum;
3064 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3065 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3066 dummy_target.to_get_bookmark = dummy_get_bookmark;
3067 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3068 dummy_target.to_xfer_partial = default_xfer_partial;
3069 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3070 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3071 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3072 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3073 dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
3074 dummy_target.to_stopped_by_watchpoint = return_zero;
3075 dummy_target.to_stopped_data_address =
3076 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3077 dummy_target.to_magic = OPS_MAGIC;
3081 debug_to_open (char *args, int from_tty)
3083 debug_target.to_open (args, from_tty);
3085 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3089 target_close (struct target_ops *targ, int quitting)
3091 if (targ->to_xclose != NULL)
3092 targ->to_xclose (targ, quitting);
3093 else if (targ->to_close != NULL)
3094 targ->to_close (quitting);
3097 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3101 target_attach (char *args, int from_tty)
3103 struct target_ops *t;
3105 for (t = current_target.beneath; t != NULL; t = t->beneath)
3107 if (t->to_attach != NULL)
3109 t->to_attach (t, args, from_tty);
3111 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3117 internal_error (__FILE__, __LINE__,
3118 _("could not find a target to attach"));
3122 target_thread_alive (ptid_t ptid)
3124 struct target_ops *t;
3126 for (t = current_target.beneath; t != NULL; t = t->beneath)
3128 if (t->to_thread_alive != NULL)
3132 retval = t->to_thread_alive (t, ptid);
3134 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3135 PIDGET (ptid), retval);
3145 target_find_new_threads (void)
3147 struct target_ops *t;
3149 for (t = current_target.beneath; t != NULL; t = t->beneath)
3151 if (t->to_find_new_threads != NULL)
3153 t->to_find_new_threads (t);
3155 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3163 target_stop (ptid_t ptid)
3167 warning (_("May not interrupt or stop the target, ignoring attempt"));
3171 (*current_target.to_stop) (ptid);
3175 debug_to_post_attach (int pid)
3177 debug_target.to_post_attach (pid);
3179 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3182 /* Return a pretty printed form of target_waitstatus.
3183 Space for the result is malloc'd, caller must free. */
3186 target_waitstatus_to_string (const struct target_waitstatus *ws)
3188 const char *kind_str = "status->kind = ";
3192 case TARGET_WAITKIND_EXITED:
3193 return xstrprintf ("%sexited, status = %d",
3194 kind_str, ws->value.integer);
3195 case TARGET_WAITKIND_STOPPED:
3196 return xstrprintf ("%sstopped, signal = %s",
3197 kind_str, target_signal_to_name (ws->value.sig));
3198 case TARGET_WAITKIND_SIGNALLED:
3199 return xstrprintf ("%ssignalled, signal = %s",
3200 kind_str, target_signal_to_name (ws->value.sig));
3201 case TARGET_WAITKIND_LOADED:
3202 return xstrprintf ("%sloaded", kind_str);
3203 case TARGET_WAITKIND_FORKED:
3204 return xstrprintf ("%sforked", kind_str);
3205 case TARGET_WAITKIND_VFORKED:
3206 return xstrprintf ("%svforked", kind_str);
3207 case TARGET_WAITKIND_EXECD:
3208 return xstrprintf ("%sexecd", kind_str);
3209 case TARGET_WAITKIND_SYSCALL_ENTRY:
3210 return xstrprintf ("%sentered syscall", kind_str);
3211 case TARGET_WAITKIND_SYSCALL_RETURN:
3212 return xstrprintf ("%sexited syscall", kind_str);
3213 case TARGET_WAITKIND_SPURIOUS:
3214 return xstrprintf ("%sspurious", kind_str);
3215 case TARGET_WAITKIND_IGNORE:
3216 return xstrprintf ("%signore", kind_str);
3217 case TARGET_WAITKIND_NO_HISTORY:
3218 return xstrprintf ("%sno-history", kind_str);
3220 return xstrprintf ("%sunknown???", kind_str);
3225 debug_print_register (const char * func,
3226 struct regcache *regcache, int regno)
3228 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3230 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3231 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3232 && gdbarch_register_name (gdbarch, regno) != NULL
3233 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3234 fprintf_unfiltered (gdb_stdlog, "(%s)",
3235 gdbarch_register_name (gdbarch, regno));
3237 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3238 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3240 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3241 int i, size = register_size (gdbarch, regno);
3242 unsigned char buf[MAX_REGISTER_SIZE];
3244 regcache_raw_collect (regcache, regno, buf);
3245 fprintf_unfiltered (gdb_stdlog, " = ");
3246 for (i = 0; i < size; i++)
3248 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3250 if (size <= sizeof (LONGEST))
3252 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3254 fprintf_unfiltered (gdb_stdlog, " %s %s",
3255 core_addr_to_string_nz (val), plongest (val));
3258 fprintf_unfiltered (gdb_stdlog, "\n");
3262 target_fetch_registers (struct regcache *regcache, int regno)
3264 struct target_ops *t;
3266 for (t = current_target.beneath; t != NULL; t = t->beneath)
3268 if (t->to_fetch_registers != NULL)
3270 t->to_fetch_registers (t, regcache, regno);
3272 debug_print_register ("target_fetch_registers", regcache, regno);
3279 target_store_registers (struct regcache *regcache, int regno)
3281 struct target_ops *t;
3283 if (!may_write_registers)
3284 error (_("Writing to registers is not allowed (regno %d)"), regno);
3286 for (t = current_target.beneath; t != NULL; t = t->beneath)
3288 if (t->to_store_registers != NULL)
3290 t->to_store_registers (t, regcache, regno);
3293 debug_print_register ("target_store_registers", regcache, regno);
3303 target_core_of_thread (ptid_t ptid)
3305 struct target_ops *t;
3307 for (t = current_target.beneath; t != NULL; t = t->beneath)
3309 if (t->to_core_of_thread != NULL)
3311 int retval = t->to_core_of_thread (t, ptid);
3314 fprintf_unfiltered (gdb_stdlog,
3315 "target_core_of_thread (%d) = %d\n",
3316 PIDGET (ptid), retval);
3325 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3327 struct target_ops *t;
3329 for (t = current_target.beneath; t != NULL; t = t->beneath)
3331 if (t->to_verify_memory != NULL)
3333 int retval = t->to_verify_memory (t, data, memaddr, size);
3336 fprintf_unfiltered (gdb_stdlog,
3337 "target_verify_memory (%s, %s) = %d\n",
3338 paddress (target_gdbarch, memaddr),
3349 debug_to_prepare_to_store (struct regcache *regcache)
3351 debug_target.to_prepare_to_store (regcache);
3353 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3357 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3358 int write, struct mem_attrib *attrib,
3359 struct target_ops *target)
3363 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3366 fprintf_unfiltered (gdb_stdlog,
3367 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3368 paddress (target_gdbarch, memaddr), len,
3369 write ? "write" : "read", retval);
3375 fputs_unfiltered (", bytes =", gdb_stdlog);
3376 for (i = 0; i < retval; i++)
3378 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3380 if (targetdebug < 2 && i > 0)
3382 fprintf_unfiltered (gdb_stdlog, " ...");
3385 fprintf_unfiltered (gdb_stdlog, "\n");
3388 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3392 fputc_unfiltered ('\n', gdb_stdlog);
3398 debug_to_files_info (struct target_ops *target)
3400 debug_target.to_files_info (target);
3402 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3406 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3407 struct bp_target_info *bp_tgt)
3411 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3413 fprintf_unfiltered (gdb_stdlog,
3414 "target_insert_breakpoint (%s, xxx) = %ld\n",
3415 core_addr_to_string (bp_tgt->placed_address),
3416 (unsigned long) retval);
3421 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3422 struct bp_target_info *bp_tgt)
3426 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3428 fprintf_unfiltered (gdb_stdlog,
3429 "target_remove_breakpoint (%s, xxx) = %ld\n",
3430 core_addr_to_string (bp_tgt->placed_address),
3431 (unsigned long) retval);
3436 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3440 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3442 fprintf_unfiltered (gdb_stdlog,
3443 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3444 (unsigned long) type,
3445 (unsigned long) cnt,
3446 (unsigned long) from_tty,
3447 (unsigned long) retval);
3452 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3456 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3458 fprintf_unfiltered (gdb_stdlog,
3459 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3460 core_addr_to_string (addr), (unsigned long) len,
3461 core_addr_to_string (retval));
3466 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3467 struct expression *cond)
3471 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3474 fprintf_unfiltered (gdb_stdlog,
3475 "target_can_accel_watchpoint_condition "
3476 "(%s, %d, %d, %s) = %ld\n",
3477 core_addr_to_string (addr), len, rw,
3478 host_address_to_string (cond), (unsigned long) retval);
3483 debug_to_stopped_by_watchpoint (void)
3487 retval = debug_target.to_stopped_by_watchpoint ();
3489 fprintf_unfiltered (gdb_stdlog,
3490 "target_stopped_by_watchpoint () = %ld\n",
3491 (unsigned long) retval);
3496 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3500 retval = debug_target.to_stopped_data_address (target, addr);
3502 fprintf_unfiltered (gdb_stdlog,
3503 "target_stopped_data_address ([%s]) = %ld\n",
3504 core_addr_to_string (*addr),
3505 (unsigned long)retval);
3510 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3512 CORE_ADDR start, int length)
3516 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3519 fprintf_filtered (gdb_stdlog,
3520 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3521 core_addr_to_string (addr), core_addr_to_string (start),
3527 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3528 struct bp_target_info *bp_tgt)
3532 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3534 fprintf_unfiltered (gdb_stdlog,
3535 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3536 core_addr_to_string (bp_tgt->placed_address),
3537 (unsigned long) retval);
3542 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3543 struct bp_target_info *bp_tgt)
3547 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3549 fprintf_unfiltered (gdb_stdlog,
3550 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3551 core_addr_to_string (bp_tgt->placed_address),
3552 (unsigned long) retval);
3557 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3558 struct expression *cond)
3562 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3564 fprintf_unfiltered (gdb_stdlog,
3565 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3566 core_addr_to_string (addr), len, type,
3567 host_address_to_string (cond), (unsigned long) retval);
3572 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3573 struct expression *cond)
3577 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3579 fprintf_unfiltered (gdb_stdlog,
3580 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3581 core_addr_to_string (addr), len, type,
3582 host_address_to_string (cond), (unsigned long) retval);
3587 debug_to_terminal_init (void)
3589 debug_target.to_terminal_init ();
3591 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3595 debug_to_terminal_inferior (void)
3597 debug_target.to_terminal_inferior ();
3599 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3603 debug_to_terminal_ours_for_output (void)
3605 debug_target.to_terminal_ours_for_output ();
3607 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3611 debug_to_terminal_ours (void)
3613 debug_target.to_terminal_ours ();
3615 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3619 debug_to_terminal_save_ours (void)
3621 debug_target.to_terminal_save_ours ();
3623 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3627 debug_to_terminal_info (char *arg, int from_tty)
3629 debug_target.to_terminal_info (arg, from_tty);
3631 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3636 debug_to_load (char *args, int from_tty)
3638 debug_target.to_load (args, from_tty);
3640 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3644 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
3648 retval = debug_target.to_lookup_symbol (name, addrp);
3650 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
3656 debug_to_post_startup_inferior (ptid_t ptid)
3658 debug_target.to_post_startup_inferior (ptid);
3660 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3665 debug_to_insert_fork_catchpoint (int pid)
3667 debug_target.to_insert_fork_catchpoint (pid);
3669 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n",
3674 debug_to_remove_fork_catchpoint (int pid)
3678 retval = debug_target.to_remove_fork_catchpoint (pid);
3680 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3687 debug_to_insert_vfork_catchpoint (int pid)
3689 debug_target.to_insert_vfork_catchpoint (pid);
3691 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n",
3696 debug_to_remove_vfork_catchpoint (int pid)
3700 retval = debug_target.to_remove_vfork_catchpoint (pid);
3702 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3709 debug_to_insert_exec_catchpoint (int pid)
3711 debug_target.to_insert_exec_catchpoint (pid);
3713 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n",
3718 debug_to_remove_exec_catchpoint (int pid)
3722 retval = debug_target.to_remove_exec_catchpoint (pid);
3724 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
3731 debug_to_has_exited (int pid, int wait_status, int *exit_status)
3735 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
3737 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
3738 pid, wait_status, *exit_status, has_exited);
3744 debug_to_can_run (void)
3748 retval = debug_target.to_can_run ();
3750 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
3756 debug_to_notice_signals (ptid_t ptid)
3758 debug_target.to_notice_signals (ptid);
3760 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
3764 static struct gdbarch *
3765 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
3767 struct gdbarch *retval;
3769 retval = debug_target.to_thread_architecture (ops, ptid);
3771 fprintf_unfiltered (gdb_stdlog,
3772 "target_thread_architecture (%s) = %s [%s]\n",
3773 target_pid_to_str (ptid),
3774 host_address_to_string (retval),
3775 gdbarch_bfd_arch_info (retval)->printable_name);
3780 debug_to_stop (ptid_t ptid)
3782 debug_target.to_stop (ptid);
3784 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
3785 target_pid_to_str (ptid));
3789 debug_to_rcmd (char *command,
3790 struct ui_file *outbuf)
3792 debug_target.to_rcmd (command, outbuf);
3793 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
3797 debug_to_pid_to_exec_file (int pid)
3801 exec_file = debug_target.to_pid_to_exec_file (pid);
3803 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
3810 setup_target_debug (void)
3812 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3814 current_target.to_open = debug_to_open;
3815 current_target.to_post_attach = debug_to_post_attach;
3816 current_target.to_prepare_to_store = debug_to_prepare_to_store;
3817 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
3818 current_target.to_files_info = debug_to_files_info;
3819 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
3820 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
3821 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
3822 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
3823 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
3824 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
3825 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
3826 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
3827 current_target.to_stopped_data_address = debug_to_stopped_data_address;
3828 current_target.to_watchpoint_addr_within_range
3829 = debug_to_watchpoint_addr_within_range;
3830 current_target.to_region_ok_for_hw_watchpoint
3831 = debug_to_region_ok_for_hw_watchpoint;
3832 current_target.to_can_accel_watchpoint_condition
3833 = debug_to_can_accel_watchpoint_condition;
3834 current_target.to_terminal_init = debug_to_terminal_init;
3835 current_target.to_terminal_inferior = debug_to_terminal_inferior;
3836 current_target.to_terminal_ours_for_output
3837 = debug_to_terminal_ours_for_output;
3838 current_target.to_terminal_ours = debug_to_terminal_ours;
3839 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
3840 current_target.to_terminal_info = debug_to_terminal_info;
3841 current_target.to_load = debug_to_load;
3842 current_target.to_lookup_symbol = debug_to_lookup_symbol;
3843 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
3844 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
3845 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
3846 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
3847 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
3848 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
3849 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
3850 current_target.to_has_exited = debug_to_has_exited;
3851 current_target.to_can_run = debug_to_can_run;
3852 current_target.to_notice_signals = debug_to_notice_signals;
3853 current_target.to_stop = debug_to_stop;
3854 current_target.to_rcmd = debug_to_rcmd;
3855 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
3856 current_target.to_thread_architecture = debug_to_thread_architecture;
3860 static char targ_desc[] =
3861 "Names of targets and files being debugged.\nShows the entire \
3862 stack of targets currently in use (including the exec-file,\n\
3863 core-file, and process, if any), as well as the symbol file name.";
3866 do_monitor_command (char *cmd,
3869 if ((current_target.to_rcmd
3870 == (void (*) (char *, struct ui_file *)) tcomplain)
3871 || (current_target.to_rcmd == debug_to_rcmd
3872 && (debug_target.to_rcmd
3873 == (void (*) (char *, struct ui_file *)) tcomplain)))
3874 error (_("\"monitor\" command not supported by this target."));
3875 target_rcmd (cmd, gdb_stdtarg);
3878 /* Print the name of each layers of our target stack. */
3881 maintenance_print_target_stack (char *cmd, int from_tty)
3883 struct target_ops *t;
3885 printf_filtered (_("The current target stack is:\n"));
3887 for (t = target_stack; t != NULL; t = t->beneath)
3889 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3893 /* Controls if async mode is permitted. */
3894 int target_async_permitted = 0;
3896 /* The set command writes to this variable. If the inferior is
3897 executing, linux_nat_async_permitted is *not* updated. */
3898 static int target_async_permitted_1 = 0;
3901 set_maintenance_target_async_permitted (char *args, int from_tty,
3902 struct cmd_list_element *c)
3904 if (have_live_inferiors ())
3906 target_async_permitted_1 = target_async_permitted;
3907 error (_("Cannot change this setting while the inferior is running."));
3910 target_async_permitted = target_async_permitted_1;
3914 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
3915 struct cmd_list_element *c,
3918 fprintf_filtered (file,
3919 _("Controlling the inferior in "
3920 "asynchronous mode is %s.\n"), value);
3923 /* Temporary copies of permission settings. */
3925 static int may_write_registers_1 = 1;
3926 static int may_write_memory_1 = 1;
3927 static int may_insert_breakpoints_1 = 1;
3928 static int may_insert_tracepoints_1 = 1;
3929 static int may_insert_fast_tracepoints_1 = 1;
3930 static int may_stop_1 = 1;
3932 /* Make the user-set values match the real values again. */
3935 update_target_permissions (void)
3937 may_write_registers_1 = may_write_registers;
3938 may_write_memory_1 = may_write_memory;
3939 may_insert_breakpoints_1 = may_insert_breakpoints;
3940 may_insert_tracepoints_1 = may_insert_tracepoints;
3941 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3942 may_stop_1 = may_stop;
3945 /* The one function handles (most of) the permission flags in the same
3949 set_target_permissions (char *args, int from_tty,
3950 struct cmd_list_element *c)
3952 if (target_has_execution)
3954 update_target_permissions ();
3955 error (_("Cannot change this setting while the inferior is running."));
3958 /* Make the real values match the user-changed values. */
3959 may_write_registers = may_write_registers_1;
3960 may_insert_breakpoints = may_insert_breakpoints_1;
3961 may_insert_tracepoints = may_insert_tracepoints_1;
3962 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
3963 may_stop = may_stop_1;
3964 update_observer_mode ();
3967 /* Set memory write permission independently of observer mode. */
3970 set_write_memory_permission (char *args, int from_tty,
3971 struct cmd_list_element *c)
3973 /* Make the real values match the user-changed values. */
3974 may_write_memory = may_write_memory_1;
3975 update_observer_mode ();
3980 initialize_targets (void)
3982 init_dummy_target ();
3983 push_target (&dummy_target);
3985 add_info ("target", target_info, targ_desc);
3986 add_info ("files", target_info, targ_desc);
3988 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
3989 Set target debugging."), _("\
3990 Show target debugging."), _("\
3991 When non-zero, target debugging is enabled. Higher numbers are more\n\
3992 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
3996 &setdebuglist, &showdebuglist);
3998 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
3999 &trust_readonly, _("\
4000 Set mode for reading from readonly sections."), _("\
4001 Show mode for reading from readonly sections."), _("\
4002 When this mode is on, memory reads from readonly sections (such as .text)\n\
4003 will be read from the object file instead of from the target. This will\n\
4004 result in significant performance improvement for remote targets."),
4006 show_trust_readonly,
4007 &setlist, &showlist);
4009 add_com ("monitor", class_obscure, do_monitor_command,
4010 _("Send a command to the remote monitor (remote targets only)."));
4012 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4013 _("Print the name of each layer of the internal target stack."),
4014 &maintenanceprintlist);
4016 add_setshow_boolean_cmd ("target-async", no_class,
4017 &target_async_permitted_1, _("\
4018 Set whether gdb controls the inferior in asynchronous mode."), _("\
4019 Show whether gdb controls the inferior in asynchronous mode."), _("\
4020 Tells gdb whether to control the inferior in asynchronous mode."),
4021 set_maintenance_target_async_permitted,
4022 show_maintenance_target_async_permitted,
4026 add_setshow_boolean_cmd ("stack-cache", class_support,
4027 &stack_cache_enabled_p_1, _("\
4028 Set cache use for stack access."), _("\
4029 Show cache use for stack access."), _("\
4030 When on, use the data cache for all stack access, regardless of any\n\
4031 configured memory regions. This improves remote performance significantly.\n\
4032 By default, caching for stack access is on."),
4033 set_stack_cache_enabled_p,
4034 show_stack_cache_enabled_p,
4035 &setlist, &showlist);
4037 add_setshow_boolean_cmd ("may-write-registers", class_support,
4038 &may_write_registers_1, _("\
4039 Set permission to write into registers."), _("\
4040 Show permission to write into registers."), _("\
4041 When this permission is on, GDB may write into the target's registers.\n\
4042 Otherwise, any sort of write attempt will result in an error."),
4043 set_target_permissions, NULL,
4044 &setlist, &showlist);
4046 add_setshow_boolean_cmd ("may-write-memory", class_support,
4047 &may_write_memory_1, _("\
4048 Set permission to write into target memory."), _("\
4049 Show permission to write into target memory."), _("\
4050 When this permission is on, GDB may write into the target's memory.\n\
4051 Otherwise, any sort of write attempt will result in an error."),
4052 set_write_memory_permission, NULL,
4053 &setlist, &showlist);
4055 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4056 &may_insert_breakpoints_1, _("\
4057 Set permission to insert breakpoints in the target."), _("\
4058 Show permission to insert breakpoints in the target."), _("\
4059 When this permission is on, GDB may insert breakpoints in the program.\n\
4060 Otherwise, any sort of insertion attempt will result in an error."),
4061 set_target_permissions, NULL,
4062 &setlist, &showlist);
4064 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4065 &may_insert_tracepoints_1, _("\
4066 Set permission to insert tracepoints in the target."), _("\
4067 Show permission to insert tracepoints in the target."), _("\
4068 When this permission is on, GDB may insert tracepoints in the program.\n\
4069 Otherwise, any sort of insertion attempt will result in an error."),
4070 set_target_permissions, NULL,
4071 &setlist, &showlist);
4073 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4074 &may_insert_fast_tracepoints_1, _("\
4075 Set permission to insert fast tracepoints in the target."), _("\
4076 Show permission to insert fast tracepoints in the target."), _("\
4077 When this permission is on, GDB may insert fast tracepoints.\n\
4078 Otherwise, any sort of insertion attempt will result in an error."),
4079 set_target_permissions, NULL,
4080 &setlist, &showlist);
4082 add_setshow_boolean_cmd ("may-interrupt", class_support,
4084 Set permission to interrupt or signal the target."), _("\
4085 Show permission to interrupt or signal the target."), _("\
4086 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4087 Otherwise, any attempt to interrupt or stop will be ignored."),
4088 set_target_permissions, NULL,
4089 &setlist, &showlist);
4092 target_dcache = dcache_init ();