1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops *,
53 CORE_ADDR, CORE_ADDR, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
57 static void tcomplain (void) ATTRIBUTE_NORETURN;
59 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
61 static int return_zero (void);
63 static int return_one (void);
65 static int return_minus_one (void);
67 void target_ignore (void);
69 static void target_command (char *, int);
71 static struct target_ops *find_default_run_target (char *);
73 static LONGEST default_xfer_partial (struct target_ops *ops,
74 enum target_object object,
75 const char *annex, gdb_byte *readbuf,
76 const gdb_byte *writebuf,
77 ULONGEST offset, LONGEST len);
79 static LONGEST current_xfer_partial (struct target_ops *ops,
80 enum target_object object,
81 const char *annex, gdb_byte *readbuf,
82 const gdb_byte *writebuf,
83 ULONGEST offset, LONGEST len);
85 static LONGEST target_xfer_partial (struct target_ops *ops,
86 enum target_object object,
88 void *readbuf, const void *writebuf,
89 ULONGEST offset, LONGEST len);
91 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
94 static void init_dummy_target (void);
96 static struct target_ops debug_target;
98 static void debug_to_open (char *, int);
100 static void debug_to_prepare_to_store (struct regcache *);
102 static void debug_to_files_info (struct target_ops *);
104 static int debug_to_insert_breakpoint (struct gdbarch *,
105 struct bp_target_info *);
107 static int debug_to_remove_breakpoint (struct gdbarch *,
108 struct bp_target_info *);
110 static int debug_to_can_use_hw_breakpoint (int, int, int);
112 static int debug_to_insert_hw_breakpoint (struct gdbarch *,
113 struct bp_target_info *);
115 static int debug_to_remove_hw_breakpoint (struct gdbarch *,
116 struct bp_target_info *);
118 static int debug_to_insert_watchpoint (CORE_ADDR, int, int,
119 struct expression *);
121 static int debug_to_remove_watchpoint (CORE_ADDR, int, int,
122 struct expression *);
124 static int debug_to_stopped_by_watchpoint (void);
126 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
128 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
129 CORE_ADDR, CORE_ADDR, int);
131 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
133 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int,
134 struct expression *);
136 static void debug_to_terminal_init (void);
138 static void debug_to_terminal_inferior (void);
140 static void debug_to_terminal_ours_for_output (void);
142 static void debug_to_terminal_save_ours (void);
144 static void debug_to_terminal_ours (void);
146 static void debug_to_terminal_info (char *, int);
148 static void debug_to_load (char *, int);
150 static int debug_to_can_run (void);
152 static void debug_to_stop (ptid_t);
154 /* Pointer to array of target architecture structures; the size of the
155 array; the current index into the array; the allocated size of the
157 struct target_ops **target_structs;
158 unsigned target_struct_size;
159 unsigned target_struct_index;
160 unsigned target_struct_allocsize;
161 #define DEFAULT_ALLOCSIZE 10
163 /* The initial current target, so that there is always a semi-valid
166 static struct target_ops dummy_target;
168 /* Top of target stack. */
170 static struct target_ops *target_stack;
172 /* The target structure we are currently using to talk to a process
173 or file or whatever "inferior" we have. */
175 struct target_ops current_target;
177 /* Command list for target. */
179 static struct cmd_list_element *targetlist = NULL;
181 /* Nonzero if we should trust readonly sections from the
182 executable when reading memory. */
184 static int trust_readonly = 0;
186 /* Nonzero if we should show true memory content including
187 memory breakpoint inserted by gdb. */
189 static int show_memory_breakpoints = 0;
191 /* These globals control whether GDB attempts to perform these
192 operations; they are useful for targets that need to prevent
193 inadvertant disruption, such as in non-stop mode. */
195 int may_write_registers = 1;
197 int may_write_memory = 1;
199 int may_insert_breakpoints = 1;
201 int may_insert_tracepoints = 1;
203 int may_insert_fast_tracepoints = 1;
207 /* Non-zero if we want to see trace of target level stuff. */
209 static int targetdebug = 0;
211 show_targetdebug (struct ui_file *file, int from_tty,
212 struct cmd_list_element *c, const char *value)
214 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
217 static void setup_target_debug (void);
219 /* The option sets this. */
220 static int stack_cache_enabled_p_1 = 1;
221 /* And set_stack_cache_enabled_p updates this.
222 The reason for the separation is so that we don't flush the cache for
223 on->on transitions. */
224 static int stack_cache_enabled_p = 1;
226 /* This is called *after* the stack-cache has been set.
227 Flush the cache for off->on and on->off transitions.
228 There's no real need to flush the cache for on->off transitions,
229 except cleanliness. */
232 set_stack_cache_enabled_p (char *args, int from_tty,
233 struct cmd_list_element *c)
235 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
236 target_dcache_invalidate ();
238 stack_cache_enabled_p = stack_cache_enabled_p_1;
242 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
243 struct cmd_list_element *c, const char *value)
245 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
248 /* Cache of memory operations, to speed up remote access. */
249 static DCACHE *target_dcache;
251 /* Invalidate the target dcache. */
254 target_dcache_invalidate (void)
256 dcache_invalidate (target_dcache);
259 /* The user just typed 'target' without the name of a target. */
262 target_command (char *arg, int from_tty)
264 fputs_filtered ("Argument required (target name). Try `help target'\n",
268 /* Default target_has_* methods for process_stratum targets. */
271 default_child_has_all_memory (struct target_ops *ops)
273 /* If no inferior selected, then we can't read memory here. */
274 if (ptid_equal (inferior_ptid, null_ptid))
281 default_child_has_memory (struct target_ops *ops)
283 /* If no inferior selected, then we can't read memory here. */
284 if (ptid_equal (inferior_ptid, null_ptid))
291 default_child_has_stack (struct target_ops *ops)
293 /* If no inferior selected, there's no stack. */
294 if (ptid_equal (inferior_ptid, null_ptid))
301 default_child_has_registers (struct target_ops *ops)
303 /* Can't read registers from no inferior. */
304 if (ptid_equal (inferior_ptid, null_ptid))
311 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
313 /* If there's no thread selected, then we can't make it run through
315 if (ptid_equal (the_ptid, null_ptid))
323 target_has_all_memory_1 (void)
325 struct target_ops *t;
327 for (t = current_target.beneath; t != NULL; t = t->beneath)
328 if (t->to_has_all_memory (t))
335 target_has_memory_1 (void)
337 struct target_ops *t;
339 for (t = current_target.beneath; t != NULL; t = t->beneath)
340 if (t->to_has_memory (t))
347 target_has_stack_1 (void)
349 struct target_ops *t;
351 for (t = current_target.beneath; t != NULL; t = t->beneath)
352 if (t->to_has_stack (t))
359 target_has_registers_1 (void)
361 struct target_ops *t;
363 for (t = current_target.beneath; t != NULL; t = t->beneath)
364 if (t->to_has_registers (t))
371 target_has_execution_1 (ptid_t the_ptid)
373 struct target_ops *t;
375 for (t = current_target.beneath; t != NULL; t = t->beneath)
376 if (t->to_has_execution (t, the_ptid))
383 target_has_execution_current (void)
385 return target_has_execution_1 (inferior_ptid);
388 /* Add a possible target architecture to the list. */
391 add_target (struct target_ops *t)
393 /* Provide default values for all "must have" methods. */
394 if (t->to_xfer_partial == NULL)
395 t->to_xfer_partial = default_xfer_partial;
397 if (t->to_has_all_memory == NULL)
398 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
400 if (t->to_has_memory == NULL)
401 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
403 if (t->to_has_stack == NULL)
404 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_registers == NULL)
407 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_execution == NULL)
410 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
414 target_struct_allocsize = DEFAULT_ALLOCSIZE;
415 target_structs = (struct target_ops **) xmalloc
416 (target_struct_allocsize * sizeof (*target_structs));
418 if (target_struct_size >= target_struct_allocsize)
420 target_struct_allocsize *= 2;
421 target_structs = (struct target_ops **)
422 xrealloc ((char *) target_structs,
423 target_struct_allocsize * sizeof (*target_structs));
425 target_structs[target_struct_size++] = t;
427 if (targetlist == NULL)
428 add_prefix_cmd ("target", class_run, target_command, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist, "target ", 0, &cmdlist);
435 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
448 struct target_ops *t;
450 for (t = current_target.beneath; t != NULL; t = t->beneath)
451 if (t->to_kill != NULL)
454 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
464 target_load (char *arg, int from_tty)
466 target_dcache_invalidate ();
467 (*current_target.to_load) (arg, from_tty);
471 target_create_inferior (char *exec_file, char *args,
472 char **env, int from_tty)
474 struct target_ops *t;
476 for (t = current_target.beneath; t != NULL; t = t->beneath)
478 if (t->to_create_inferior != NULL)
480 t->to_create_inferior (t, exec_file, args, env, from_tty);
482 fprintf_unfiltered (gdb_stdlog,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file, args, from_tty);
489 internal_error (__FILE__, __LINE__,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target.to_terminal_inferior) ();
509 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
510 struct target_ops *t)
512 errno = EIO; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target.to_shortname);
526 error (_("You can't do that without a process to debug."));
530 default_terminal_info (char *args, int from_tty)
532 printf_unfiltered (_("No saved terminal information.\n"));
535 /* A default implementation for the to_get_ada_task_ptid target method.
537 This function builds the PTID by using both LWP and TID as part of
538 the PTID lwp and tid elements. The pid used is the pid of the
542 default_get_ada_task_ptid (long lwp, long tid)
544 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
547 static enum exec_direction_kind
548 default_execution_direction (void)
550 if (!target_can_execute_reverse)
552 else if (!target_can_async_p ())
555 gdb_assert_not_reached ("\
556 to_execution_direction must be implemented for reverse async");
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 /* Do not inherit to_ranged_break_num_registers. */
608 INHERIT (to_insert_watchpoint, t);
609 INHERIT (to_remove_watchpoint, t);
610 /* Do not inherit to_insert_mask_watchpoint. */
611 /* Do not inherit to_remove_mask_watchpoint. */
612 INHERIT (to_stopped_data_address, t);
613 INHERIT (to_have_steppable_watchpoint, t);
614 INHERIT (to_have_continuable_watchpoint, t);
615 INHERIT (to_stopped_by_watchpoint, t);
616 INHERIT (to_watchpoint_addr_within_range, t);
617 INHERIT (to_region_ok_for_hw_watchpoint, t);
618 INHERIT (to_can_accel_watchpoint_condition, t);
619 /* Do not inherit to_masked_watch_num_registers. */
620 INHERIT (to_terminal_init, t);
621 INHERIT (to_terminal_inferior, t);
622 INHERIT (to_terminal_ours_for_output, t);
623 INHERIT (to_terminal_ours, t);
624 INHERIT (to_terminal_save_ours, t);
625 INHERIT (to_terminal_info, t);
626 /* Do not inherit to_kill. */
627 INHERIT (to_load, t);
628 /* Do no inherit to_create_inferior. */
629 INHERIT (to_post_startup_inferior, t);
630 INHERIT (to_insert_fork_catchpoint, t);
631 INHERIT (to_remove_fork_catchpoint, t);
632 INHERIT (to_insert_vfork_catchpoint, t);
633 INHERIT (to_remove_vfork_catchpoint, t);
634 /* Do not inherit to_follow_fork. */
635 INHERIT (to_insert_exec_catchpoint, t);
636 INHERIT (to_remove_exec_catchpoint, t);
637 INHERIT (to_set_syscall_catchpoint, t);
638 INHERIT (to_has_exited, t);
639 /* Do not inherit to_mourn_inferior. */
640 INHERIT (to_can_run, t);
641 /* Do not inherit to_pass_signals. */
642 /* Do not inherit to_thread_alive. */
643 /* Do not inherit to_find_new_threads. */
644 /* Do not inherit to_pid_to_str. */
645 INHERIT (to_extra_thread_info, t);
646 INHERIT (to_thread_name, t);
647 INHERIT (to_stop, t);
648 /* Do not inherit to_xfer_partial. */
649 INHERIT (to_rcmd, t);
650 INHERIT (to_pid_to_exec_file, t);
651 INHERIT (to_log_command, t);
652 INHERIT (to_stratum, t);
653 /* Do not inherit to_has_all_memory. */
654 /* Do not inherit to_has_memory. */
655 /* Do not inherit to_has_stack. */
656 /* Do not inherit to_has_registers. */
657 /* Do not inherit to_has_execution. */
658 INHERIT (to_has_thread_control, t);
659 INHERIT (to_can_async_p, t);
660 INHERIT (to_is_async_p, t);
661 INHERIT (to_async, t);
662 INHERIT (to_find_memory_regions, t);
663 INHERIT (to_make_corefile_notes, t);
664 INHERIT (to_get_bookmark, t);
665 INHERIT (to_goto_bookmark, t);
666 /* Do not inherit to_get_thread_local_address. */
667 INHERIT (to_can_execute_reverse, t);
668 INHERIT (to_execution_direction, t);
669 INHERIT (to_thread_architecture, t);
670 /* Do not inherit to_read_description. */
671 INHERIT (to_get_ada_task_ptid, t);
672 /* Do not inherit to_search_memory. */
673 INHERIT (to_supports_multi_process, t);
674 INHERIT (to_supports_enable_disable_tracepoint, t);
675 INHERIT (to_trace_init, t);
676 INHERIT (to_download_tracepoint, t);
677 INHERIT (to_download_trace_state_variable, t);
678 INHERIT (to_enable_tracepoint, t);
679 INHERIT (to_disable_tracepoint, t);
680 INHERIT (to_trace_set_readonly_regions, t);
681 INHERIT (to_trace_start, t);
682 INHERIT (to_get_trace_status, t);
683 INHERIT (to_trace_stop, t);
684 INHERIT (to_trace_find, t);
685 INHERIT (to_get_trace_state_variable_value, t);
686 INHERIT (to_save_trace_data, t);
687 INHERIT (to_upload_tracepoints, t);
688 INHERIT (to_upload_trace_state_variables, t);
689 INHERIT (to_get_raw_trace_data, t);
690 INHERIT (to_set_disconnected_tracing, t);
691 INHERIT (to_set_circular_trace_buffer, t);
692 INHERIT (to_get_tib_address, t);
693 INHERIT (to_set_permissions, t);
694 INHERIT (to_static_tracepoint_marker_at, t);
695 INHERIT (to_static_tracepoint_markers_by_strid, t);
696 INHERIT (to_traceframe_info, t);
697 INHERIT (to_magic, t);
698 /* Do not inherit to_memory_map. */
699 /* Do not inherit to_flash_erase. */
700 /* Do not inherit to_flash_done. */
704 /* Clean up a target struct so it no longer has any zero pointers in
705 it. Some entries are defaulted to a method that print an error,
706 others are hard-wired to a standard recursive default. */
708 #define de_fault(field, value) \
709 if (!current_target.field) \
710 current_target.field = value
713 (void (*) (char *, int))
718 de_fault (to_post_attach,
721 de_fault (to_prepare_to_store,
722 (void (*) (struct regcache *))
724 de_fault (deprecated_xfer_memory,
725 (int (*) (CORE_ADDR, gdb_byte *, int, int,
726 struct mem_attrib *, struct target_ops *))
728 de_fault (to_files_info,
729 (void (*) (struct target_ops *))
731 de_fault (to_insert_breakpoint,
732 memory_insert_breakpoint);
733 de_fault (to_remove_breakpoint,
734 memory_remove_breakpoint);
735 de_fault (to_can_use_hw_breakpoint,
736 (int (*) (int, int, int))
738 de_fault (to_insert_hw_breakpoint,
739 (int (*) (struct gdbarch *, struct bp_target_info *))
741 de_fault (to_remove_hw_breakpoint,
742 (int (*) (struct gdbarch *, struct bp_target_info *))
744 de_fault (to_insert_watchpoint,
745 (int (*) (CORE_ADDR, int, int, struct expression *))
747 de_fault (to_remove_watchpoint,
748 (int (*) (CORE_ADDR, int, int, struct expression *))
750 de_fault (to_stopped_by_watchpoint,
753 de_fault (to_stopped_data_address,
754 (int (*) (struct target_ops *, CORE_ADDR *))
756 de_fault (to_watchpoint_addr_within_range,
757 default_watchpoint_addr_within_range);
758 de_fault (to_region_ok_for_hw_watchpoint,
759 default_region_ok_for_hw_watchpoint);
760 de_fault (to_can_accel_watchpoint_condition,
761 (int (*) (CORE_ADDR, int, int, struct expression *))
763 de_fault (to_terminal_init,
766 de_fault (to_terminal_inferior,
769 de_fault (to_terminal_ours_for_output,
772 de_fault (to_terminal_ours,
775 de_fault (to_terminal_save_ours,
778 de_fault (to_terminal_info,
779 default_terminal_info);
781 (void (*) (char *, int))
783 de_fault (to_post_startup_inferior,
786 de_fault (to_insert_fork_catchpoint,
789 de_fault (to_remove_fork_catchpoint,
792 de_fault (to_insert_vfork_catchpoint,
795 de_fault (to_remove_vfork_catchpoint,
798 de_fault (to_insert_exec_catchpoint,
801 de_fault (to_remove_exec_catchpoint,
804 de_fault (to_set_syscall_catchpoint,
805 (int (*) (int, int, int, int, int *))
807 de_fault (to_has_exited,
808 (int (*) (int, int, int *))
810 de_fault (to_can_run,
812 de_fault (to_extra_thread_info,
813 (char *(*) (struct thread_info *))
815 de_fault (to_thread_name,
816 (char *(*) (struct thread_info *))
821 current_target.to_xfer_partial = current_xfer_partial;
823 (void (*) (char *, struct ui_file *))
825 de_fault (to_pid_to_exec_file,
829 (void (*) (void (*) (enum inferior_event_type, void*), void*))
831 de_fault (to_thread_architecture,
832 default_thread_architecture);
833 current_target.to_read_description = NULL;
834 de_fault (to_get_ada_task_ptid,
835 (ptid_t (*) (long, long))
836 default_get_ada_task_ptid);
837 de_fault (to_supports_multi_process,
840 de_fault (to_supports_enable_disable_tracepoint,
843 de_fault (to_trace_init,
846 de_fault (to_download_tracepoint,
847 (void (*) (struct breakpoint *))
849 de_fault (to_download_trace_state_variable,
850 (void (*) (struct trace_state_variable *))
852 de_fault (to_enable_tracepoint,
853 (void (*) (struct bp_location *))
855 de_fault (to_disable_tracepoint,
856 (void (*) (struct bp_location *))
858 de_fault (to_trace_set_readonly_regions,
861 de_fault (to_trace_start,
864 de_fault (to_get_trace_status,
865 (int (*) (struct trace_status *))
867 de_fault (to_trace_stop,
870 de_fault (to_trace_find,
871 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
873 de_fault (to_get_trace_state_variable_value,
874 (int (*) (int, LONGEST *))
876 de_fault (to_save_trace_data,
877 (int (*) (const char *))
879 de_fault (to_upload_tracepoints,
880 (int (*) (struct uploaded_tp **))
882 de_fault (to_upload_trace_state_variables,
883 (int (*) (struct uploaded_tsv **))
885 de_fault (to_get_raw_trace_data,
886 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
888 de_fault (to_set_disconnected_tracing,
891 de_fault (to_set_circular_trace_buffer,
894 de_fault (to_get_tib_address,
895 (int (*) (ptid_t, CORE_ADDR *))
897 de_fault (to_set_permissions,
900 de_fault (to_static_tracepoint_marker_at,
901 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
903 de_fault (to_static_tracepoint_markers_by_strid,
904 (VEC(static_tracepoint_marker_p) * (*) (const char *))
906 de_fault (to_traceframe_info,
907 (struct traceframe_info * (*) (void))
909 de_fault (to_execution_direction, default_execution_direction);
913 /* Finally, position the target-stack beneath the squashed
914 "current_target". That way code looking for a non-inherited
915 target method can quickly and simply find it. */
916 current_target.beneath = target_stack;
919 setup_target_debug ();
922 /* Push a new target type into the stack of the existing target accessors,
923 possibly superseding some of the existing accessors.
925 Rather than allow an empty stack, we always have the dummy target at
926 the bottom stratum, so we can call the function vectors without
930 push_target (struct target_ops *t)
932 struct target_ops **cur;
934 /* Check magic number. If wrong, it probably means someone changed
935 the struct definition, but not all the places that initialize one. */
936 if (t->to_magic != OPS_MAGIC)
938 fprintf_unfiltered (gdb_stderr,
939 "Magic number of %s target struct wrong\n",
941 internal_error (__FILE__, __LINE__,
942 _("failed internal consistency check"));
945 /* Find the proper stratum to install this target in. */
946 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
948 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
952 /* If there's already targets at this stratum, remove them. */
953 /* FIXME: cagney/2003-10-15: I think this should be popping all
954 targets to CUR, and not just those at this stratum level. */
955 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
957 /* There's already something at this stratum level. Close it,
958 and un-hook it from the stack. */
959 struct target_ops *tmp = (*cur);
961 (*cur) = (*cur)->beneath;
963 target_close (tmp, 0);
966 /* We have removed all targets in our stratum, now add the new one. */
970 update_current_target ();
973 /* Remove a target_ops vector from the stack, wherever it may be.
974 Return how many times it was removed (0 or 1). */
977 unpush_target (struct target_ops *t)
979 struct target_ops **cur;
980 struct target_ops *tmp;
982 if (t->to_stratum == dummy_stratum)
983 internal_error (__FILE__, __LINE__,
984 _("Attempt to unpush the dummy target"));
986 /* Look for the specified target. Note that we assume that a target
987 can only occur once in the target stack. */
989 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
996 return 0; /* Didn't find target_ops, quit now. */
998 /* NOTE: cagney/2003-12-06: In '94 the close call was made
999 unconditional by moving it to before the above check that the
1000 target was in the target stack (something about "Change the way
1001 pushing and popping of targets work to support target overlays
1002 and inheritance"). This doesn't make much sense - only open
1003 targets should be closed. */
1004 target_close (t, 0);
1006 /* Unchain the target. */
1008 (*cur) = (*cur)->beneath;
1009 tmp->beneath = NULL;
1011 update_current_target ();
1019 target_close (target_stack, 0); /* Let it clean up. */
1020 if (unpush_target (target_stack) == 1)
1023 fprintf_unfiltered (gdb_stderr,
1024 "pop_target couldn't find target %s\n",
1025 current_target.to_shortname);
1026 internal_error (__FILE__, __LINE__,
1027 _("failed internal consistency check"));
1031 pop_all_targets_above (enum strata above_stratum, int quitting)
1033 while ((int) (current_target.to_stratum) > (int) above_stratum)
1035 target_close (target_stack, quitting);
1036 if (!unpush_target (target_stack))
1038 fprintf_unfiltered (gdb_stderr,
1039 "pop_all_targets couldn't find target %s\n",
1040 target_stack->to_shortname);
1041 internal_error (__FILE__, __LINE__,
1042 _("failed internal consistency check"));
1049 pop_all_targets (int quitting)
1051 pop_all_targets_above (dummy_stratum, quitting);
1054 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1057 target_is_pushed (struct target_ops *t)
1059 struct target_ops **cur;
1061 /* Check magic number. If wrong, it probably means someone changed
1062 the struct definition, but not all the places that initialize one. */
1063 if (t->to_magic != OPS_MAGIC)
1065 fprintf_unfiltered (gdb_stderr,
1066 "Magic number of %s target struct wrong\n",
1068 internal_error (__FILE__, __LINE__,
1069 _("failed internal consistency check"));
1072 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1079 /* Using the objfile specified in OBJFILE, find the address for the
1080 current thread's thread-local storage with offset OFFSET. */
1082 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1084 volatile CORE_ADDR addr = 0;
1085 struct target_ops *target;
1087 for (target = current_target.beneath;
1089 target = target->beneath)
1091 if (target->to_get_thread_local_address != NULL)
1096 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1098 ptid_t ptid = inferior_ptid;
1099 volatile struct gdb_exception ex;
1101 TRY_CATCH (ex, RETURN_MASK_ALL)
1105 /* Fetch the load module address for this objfile. */
1106 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1108 /* If it's 0, throw the appropriate exception. */
1110 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1111 _("TLS load module not found"));
1113 addr = target->to_get_thread_local_address (target, ptid,
1116 /* If an error occurred, print TLS related messages here. Otherwise,
1117 throw the error to some higher catcher. */
1120 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1124 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1125 error (_("Cannot find thread-local variables "
1126 "in this thread library."));
1128 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1129 if (objfile_is_library)
1130 error (_("Cannot find shared library `%s' in dynamic"
1131 " linker's load module list"), objfile->name);
1133 error (_("Cannot find executable file `%s' in dynamic"
1134 " linker's load module list"), objfile->name);
1136 case TLS_NOT_ALLOCATED_YET_ERROR:
1137 if (objfile_is_library)
1138 error (_("The inferior has not yet allocated storage for"
1139 " thread-local variables in\n"
1140 "the shared library `%s'\n"
1142 objfile->name, target_pid_to_str (ptid));
1144 error (_("The inferior has not yet allocated storage for"
1145 " thread-local variables in\n"
1146 "the executable `%s'\n"
1148 objfile->name, target_pid_to_str (ptid));
1150 case TLS_GENERIC_ERROR:
1151 if (objfile_is_library)
1152 error (_("Cannot find thread-local storage for %s, "
1153 "shared library %s:\n%s"),
1154 target_pid_to_str (ptid),
1155 objfile->name, ex.message);
1157 error (_("Cannot find thread-local storage for %s, "
1158 "executable file %s:\n%s"),
1159 target_pid_to_str (ptid),
1160 objfile->name, ex.message);
1163 throw_exception (ex);
1168 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1169 TLS is an ABI-specific thing. But we don't do that yet. */
1171 error (_("Cannot find thread-local variables on this target"));
1177 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1179 /* target_read_string -- read a null terminated string, up to LEN bytes,
1180 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1181 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1182 is responsible for freeing it. Return the number of bytes successfully
1186 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1188 int tlen, origlen, offset, i;
1192 int buffer_allocated;
1194 unsigned int nbytes_read = 0;
1196 gdb_assert (string);
1198 /* Small for testing. */
1199 buffer_allocated = 4;
1200 buffer = xmalloc (buffer_allocated);
1207 tlen = MIN (len, 4 - (memaddr & 3));
1208 offset = memaddr & 3;
1210 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1213 /* The transfer request might have crossed the boundary to an
1214 unallocated region of memory. Retry the transfer, requesting
1218 errcode = target_read_memory (memaddr, buf, 1);
1223 if (bufptr - buffer + tlen > buffer_allocated)
1227 bytes = bufptr - buffer;
1228 buffer_allocated *= 2;
1229 buffer = xrealloc (buffer, buffer_allocated);
1230 bufptr = buffer + bytes;
1233 for (i = 0; i < tlen; i++)
1235 *bufptr++ = buf[i + offset];
1236 if (buf[i + offset] == '\000')
1238 nbytes_read += i + 1;
1245 nbytes_read += tlen;
1254 struct target_section_table *
1255 target_get_section_table (struct target_ops *target)
1257 struct target_ops *t;
1260 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1262 for (t = target; t != NULL; t = t->beneath)
1263 if (t->to_get_section_table != NULL)
1264 return (*t->to_get_section_table) (t);
1269 /* Find a section containing ADDR. */
1271 struct target_section *
1272 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1274 struct target_section_table *table = target_get_section_table (target);
1275 struct target_section *secp;
1280 for (secp = table->sections; secp < table->sections_end; secp++)
1282 if (addr >= secp->addr && addr < secp->endaddr)
1288 /* Read memory from the live target, even if currently inspecting a
1289 traceframe. The return is the same as that of target_read. */
1292 target_read_live_memory (enum target_object object,
1293 ULONGEST memaddr, gdb_byte *myaddr, LONGEST len)
1296 struct cleanup *cleanup;
1298 /* Switch momentarily out of tfind mode so to access live memory.
1299 Note that this must not clear global state, such as the frame
1300 cache, which must still remain valid for the previous traceframe.
1301 We may be _building_ the frame cache at this point. */
1302 cleanup = make_cleanup_restore_traceframe_number ();
1303 set_traceframe_number (-1);
1305 ret = target_read (current_target.beneath, object, NULL,
1306 myaddr, memaddr, len);
1308 do_cleanups (cleanup);
1312 /* Using the set of read-only target sections of OPS, read live
1313 read-only memory. Note that the actual reads start from the
1314 top-most target again.
1316 For interface/parameters/return description see target.h,
1320 memory_xfer_live_readonly_partial (struct target_ops *ops,
1321 enum target_object object,
1322 gdb_byte *readbuf, ULONGEST memaddr,
1325 struct target_section *secp;
1326 struct target_section_table *table;
1328 secp = target_section_by_addr (ops, memaddr);
1330 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1333 struct target_section *p;
1334 ULONGEST memend = memaddr + len;
1336 table = target_get_section_table (ops);
1338 for (p = table->sections; p < table->sections_end; p++)
1340 if (memaddr >= p->addr)
1342 if (memend <= p->endaddr)
1344 /* Entire transfer is within this section. */
1345 return target_read_live_memory (object, memaddr,
1348 else if (memaddr >= p->endaddr)
1350 /* This section ends before the transfer starts. */
1355 /* This section overlaps the transfer. Just do half. */
1356 len = p->endaddr - memaddr;
1357 return target_read_live_memory (object, memaddr,
1367 /* Perform a partial memory transfer.
1368 For docs see target.h, to_xfer_partial. */
1371 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1372 void *readbuf, const void *writebuf, ULONGEST memaddr,
1377 struct mem_region *region;
1378 struct inferior *inf;
1380 /* Zero length requests are ok and require no work. */
1384 /* For accesses to unmapped overlay sections, read directly from
1385 files. Must do this first, as MEMADDR may need adjustment. */
1386 if (readbuf != NULL && overlay_debugging)
1388 struct obj_section *section = find_pc_overlay (memaddr);
1390 if (pc_in_unmapped_range (memaddr, section))
1392 struct target_section_table *table
1393 = target_get_section_table (ops);
1394 const char *section_name = section->the_bfd_section->name;
1396 memaddr = overlay_mapped_address (memaddr, section);
1397 return section_table_xfer_memory_partial (readbuf, writebuf,
1400 table->sections_end,
1405 /* Try the executable files, if "trust-readonly-sections" is set. */
1406 if (readbuf != NULL && trust_readonly)
1408 struct target_section *secp;
1409 struct target_section_table *table;
1411 secp = target_section_by_addr (ops, memaddr);
1413 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1416 table = target_get_section_table (ops);
1417 return section_table_xfer_memory_partial (readbuf, writebuf,
1420 table->sections_end,
1425 /* If reading unavailable memory in the context of traceframes, and
1426 this address falls within a read-only section, fallback to
1427 reading from live memory. */
1428 if (readbuf != NULL && get_traceframe_number () != -1)
1430 VEC(mem_range_s) *available;
1432 /* If we fail to get the set of available memory, then the
1433 target does not support querying traceframe info, and so we
1434 attempt reading from the traceframe anyway (assuming the
1435 target implements the old QTro packet then). */
1436 if (traceframe_available_memory (&available, memaddr, len))
1438 struct cleanup *old_chain;
1440 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1442 if (VEC_empty (mem_range_s, available)
1443 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1445 /* Don't read into the traceframe's available
1447 if (!VEC_empty (mem_range_s, available))
1449 LONGEST oldlen = len;
1451 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1452 gdb_assert (len <= oldlen);
1455 do_cleanups (old_chain);
1457 /* This goes through the topmost target again. */
1458 res = memory_xfer_live_readonly_partial (ops, object,
1459 readbuf, memaddr, len);
1463 /* No use trying further, we know some memory starting
1464 at MEMADDR isn't available. */
1468 /* Don't try to read more than how much is available, in
1469 case the target implements the deprecated QTro packet to
1470 cater for older GDBs (the target's knowledge of read-only
1471 sections may be outdated by now). */
1472 len = VEC_index (mem_range_s, available, 0)->length;
1474 do_cleanups (old_chain);
1478 /* Try GDB's internal data cache. */
1479 region = lookup_mem_region (memaddr);
1480 /* region->hi == 0 means there's no upper bound. */
1481 if (memaddr + len < region->hi || region->hi == 0)
1484 reg_len = region->hi - memaddr;
1486 switch (region->attrib.mode)
1489 if (writebuf != NULL)
1494 if (readbuf != NULL)
1499 /* We only support writing to flash during "load" for now. */
1500 if (writebuf != NULL)
1501 error (_("Writing to flash memory forbidden in this context"));
1508 if (!ptid_equal (inferior_ptid, null_ptid))
1509 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1514 /* The dcache reads whole cache lines; that doesn't play well
1515 with reading from a trace buffer, because reading outside of
1516 the collected memory range fails. */
1517 && get_traceframe_number () == -1
1518 && (region->attrib.cache
1519 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1521 if (readbuf != NULL)
1522 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1525 /* FIXME drow/2006-08-09: If we're going to preserve const
1526 correctness dcache_xfer_memory should take readbuf and
1528 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1535 if (readbuf && !show_memory_breakpoints)
1536 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1541 /* If none of those methods found the memory we wanted, fall back
1542 to a target partial transfer. Normally a single call to
1543 to_xfer_partial is enough; if it doesn't recognize an object
1544 it will call the to_xfer_partial of the next target down.
1545 But for memory this won't do. Memory is the only target
1546 object which can be read from more than one valid target.
1547 A core file, for instance, could have some of memory but
1548 delegate other bits to the target below it. So, we must
1549 manually try all targets. */
1553 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1554 readbuf, writebuf, memaddr, reg_len);
1558 /* We want to continue past core files to executables, but not
1559 past a running target's memory. */
1560 if (ops->to_has_all_memory (ops))
1565 while (ops != NULL);
1567 if (res > 0 && readbuf != NULL && !show_memory_breakpoints)
1568 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1570 /* Make sure the cache gets updated no matter what - if we are writing
1571 to the stack. Even if this write is not tagged as such, we still need
1572 to update the cache. */
1577 && !region->attrib.cache
1578 && stack_cache_enabled_p
1579 && object != TARGET_OBJECT_STACK_MEMORY)
1581 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1584 /* If we still haven't got anything, return the last error. We
1590 restore_show_memory_breakpoints (void *arg)
1592 show_memory_breakpoints = (uintptr_t) arg;
1596 make_show_memory_breakpoints_cleanup (int show)
1598 int current = show_memory_breakpoints;
1600 show_memory_breakpoints = show;
1601 return make_cleanup (restore_show_memory_breakpoints,
1602 (void *) (uintptr_t) current);
1605 /* For docs see target.h, to_xfer_partial. */
1608 target_xfer_partial (struct target_ops *ops,
1609 enum target_object object, const char *annex,
1610 void *readbuf, const void *writebuf,
1611 ULONGEST offset, LONGEST len)
1615 gdb_assert (ops->to_xfer_partial != NULL);
1617 if (writebuf && !may_write_memory)
1618 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1619 core_addr_to_string_nz (offset), plongest (len));
1621 /* If this is a memory transfer, let the memory-specific code
1622 have a look at it instead. Memory transfers are more
1624 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1625 retval = memory_xfer_partial (ops, object, readbuf,
1626 writebuf, offset, len);
1629 enum target_object raw_object = object;
1631 /* If this is a raw memory transfer, request the normal
1632 memory object from other layers. */
1633 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1634 raw_object = TARGET_OBJECT_MEMORY;
1636 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1637 writebuf, offset, len);
1642 const unsigned char *myaddr = NULL;
1644 fprintf_unfiltered (gdb_stdlog,
1645 "%s:target_xfer_partial "
1646 "(%d, %s, %s, %s, %s, %s) = %s",
1649 (annex ? annex : "(null)"),
1650 host_address_to_string (readbuf),
1651 host_address_to_string (writebuf),
1652 core_addr_to_string_nz (offset),
1653 plongest (len), plongest (retval));
1659 if (retval > 0 && myaddr != NULL)
1663 fputs_unfiltered (", bytes =", gdb_stdlog);
1664 for (i = 0; i < retval; i++)
1666 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1668 if (targetdebug < 2 && i > 0)
1670 fprintf_unfiltered (gdb_stdlog, " ...");
1673 fprintf_unfiltered (gdb_stdlog, "\n");
1676 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1680 fputc_unfiltered ('\n', gdb_stdlog);
1685 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1686 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1687 if any error occurs.
1689 If an error occurs, no guarantee is made about the contents of the data at
1690 MYADDR. In particular, the caller should not depend upon partial reads
1691 filling the buffer with good data. There is no way for the caller to know
1692 how much good data might have been transfered anyway. Callers that can
1693 deal with partial reads should call target_read (which will retry until
1694 it makes no progress, and then return how much was transferred). */
1697 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1699 /* Dispatch to the topmost target, not the flattened current_target.
1700 Memory accesses check target->to_has_(all_)memory, and the
1701 flattened target doesn't inherit those. */
1702 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1703 myaddr, memaddr, len) == len)
1709 /* Like target_read_memory, but specify explicitly that this is a read from
1710 the target's stack. This may trigger different cache behavior. */
1713 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1715 /* Dispatch to the topmost target, not the flattened current_target.
1716 Memory accesses check target->to_has_(all_)memory, and the
1717 flattened target doesn't inherit those. */
1719 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1720 myaddr, memaddr, len) == len)
1726 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1727 Returns either 0 for success or an errno value if any error occurs.
1728 If an error occurs, no guarantee is made about how much data got written.
1729 Callers that can deal with partial writes should call target_write. */
1732 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1734 /* Dispatch to the topmost target, not the flattened current_target.
1735 Memory accesses check target->to_has_(all_)memory, and the
1736 flattened target doesn't inherit those. */
1737 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1738 myaddr, memaddr, len) == len)
1744 /* Fetch the target's memory map. */
1747 target_memory_map (void)
1749 VEC(mem_region_s) *result;
1750 struct mem_region *last_one, *this_one;
1752 struct target_ops *t;
1755 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1757 for (t = current_target.beneath; t != NULL; t = t->beneath)
1758 if (t->to_memory_map != NULL)
1764 result = t->to_memory_map (t);
1768 qsort (VEC_address (mem_region_s, result),
1769 VEC_length (mem_region_s, result),
1770 sizeof (struct mem_region), mem_region_cmp);
1772 /* Check that regions do not overlap. Simultaneously assign
1773 a numbering for the "mem" commands to use to refer to
1776 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1778 this_one->number = ix;
1780 if (last_one && last_one->hi > this_one->lo)
1782 warning (_("Overlapping regions in memory map: ignoring"));
1783 VEC_free (mem_region_s, result);
1786 last_one = this_one;
1793 target_flash_erase (ULONGEST address, LONGEST length)
1795 struct target_ops *t;
1797 for (t = current_target.beneath; t != NULL; t = t->beneath)
1798 if (t->to_flash_erase != NULL)
1801 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1802 hex_string (address), phex (length, 0));
1803 t->to_flash_erase (t, address, length);
1811 target_flash_done (void)
1813 struct target_ops *t;
1815 for (t = current_target.beneath; t != NULL; t = t->beneath)
1816 if (t->to_flash_done != NULL)
1819 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1820 t->to_flash_done (t);
1828 show_trust_readonly (struct ui_file *file, int from_tty,
1829 struct cmd_list_element *c, const char *value)
1831 fprintf_filtered (file,
1832 _("Mode for reading from readonly sections is %s.\n"),
1836 /* More generic transfers. */
1839 default_xfer_partial (struct target_ops *ops, enum target_object object,
1840 const char *annex, gdb_byte *readbuf,
1841 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1843 if (object == TARGET_OBJECT_MEMORY
1844 && ops->deprecated_xfer_memory != NULL)
1845 /* If available, fall back to the target's
1846 "deprecated_xfer_memory" method. */
1851 if (writebuf != NULL)
1853 void *buffer = xmalloc (len);
1854 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1856 memcpy (buffer, writebuf, len);
1857 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1858 1/*write*/, NULL, ops);
1859 do_cleanups (cleanup);
1861 if (readbuf != NULL)
1862 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1863 0/*read*/, NULL, ops);
1866 else if (xfered == 0 && errno == 0)
1867 /* "deprecated_xfer_memory" uses 0, cross checked against
1868 ERRNO as one indication of an error. */
1873 else if (ops->beneath != NULL)
1874 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1875 readbuf, writebuf, offset, len);
1880 /* The xfer_partial handler for the topmost target. Unlike the default,
1881 it does not need to handle memory specially; it just passes all
1882 requests down the stack. */
1885 current_xfer_partial (struct target_ops *ops, enum target_object object,
1886 const char *annex, gdb_byte *readbuf,
1887 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1889 if (ops->beneath != NULL)
1890 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1891 readbuf, writebuf, offset, len);
1896 /* Target vector read/write partial wrapper functions. */
1899 target_read_partial (struct target_ops *ops,
1900 enum target_object object,
1901 const char *annex, gdb_byte *buf,
1902 ULONGEST offset, LONGEST len)
1904 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1908 target_write_partial (struct target_ops *ops,
1909 enum target_object object,
1910 const char *annex, const gdb_byte *buf,
1911 ULONGEST offset, LONGEST len)
1913 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1916 /* Wrappers to perform the full transfer. */
1918 /* For docs on target_read see target.h. */
1921 target_read (struct target_ops *ops,
1922 enum target_object object,
1923 const char *annex, gdb_byte *buf,
1924 ULONGEST offset, LONGEST len)
1928 while (xfered < len)
1930 LONGEST xfer = target_read_partial (ops, object, annex,
1931 (gdb_byte *) buf + xfered,
1932 offset + xfered, len - xfered);
1934 /* Call an observer, notifying them of the xfer progress? */
1945 /* Assuming that the entire [begin, end) range of memory cannot be
1946 read, try to read whatever subrange is possible to read.
1948 The function returns, in RESULT, either zero or one memory block.
1949 If there's a readable subrange at the beginning, it is completely
1950 read and returned. Any further readable subrange will not be read.
1951 Otherwise, if there's a readable subrange at the end, it will be
1952 completely read and returned. Any readable subranges before it
1953 (obviously, not starting at the beginning), will be ignored. In
1954 other cases -- either no readable subrange, or readable subrange(s)
1955 that is neither at the beginning, or end, nothing is returned.
1957 The purpose of this function is to handle a read across a boundary
1958 of accessible memory in a case when memory map is not available.
1959 The above restrictions are fine for this case, but will give
1960 incorrect results if the memory is 'patchy'. However, supporting
1961 'patchy' memory would require trying to read every single byte,
1962 and it seems unacceptable solution. Explicit memory map is
1963 recommended for this case -- and target_read_memory_robust will
1964 take care of reading multiple ranges then. */
1967 read_whatever_is_readable (struct target_ops *ops,
1968 ULONGEST begin, ULONGEST end,
1969 VEC(memory_read_result_s) **result)
1971 gdb_byte *buf = xmalloc (end - begin);
1972 ULONGEST current_begin = begin;
1973 ULONGEST current_end = end;
1975 memory_read_result_s r;
1977 /* If we previously failed to read 1 byte, nothing can be done here. */
1978 if (end - begin <= 1)
1984 /* Check that either first or the last byte is readable, and give up
1985 if not. This heuristic is meant to permit reading accessible memory
1986 at the boundary of accessible region. */
1987 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1988 buf, begin, 1) == 1)
1993 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1994 buf + (end-begin) - 1, end - 1, 1) == 1)
2005 /* Loop invariant is that the [current_begin, current_end) was previously
2006 found to be not readable as a whole.
2008 Note loop condition -- if the range has 1 byte, we can't divide the range
2009 so there's no point trying further. */
2010 while (current_end - current_begin > 1)
2012 ULONGEST first_half_begin, first_half_end;
2013 ULONGEST second_half_begin, second_half_end;
2015 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2019 first_half_begin = current_begin;
2020 first_half_end = middle;
2021 second_half_begin = middle;
2022 second_half_end = current_end;
2026 first_half_begin = middle;
2027 first_half_end = current_end;
2028 second_half_begin = current_begin;
2029 second_half_end = middle;
2032 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2033 buf + (first_half_begin - begin),
2035 first_half_end - first_half_begin);
2037 if (xfer == first_half_end - first_half_begin)
2039 /* This half reads up fine. So, the error must be in the
2041 current_begin = second_half_begin;
2042 current_end = second_half_end;
2046 /* This half is not readable. Because we've tried one byte, we
2047 know some part of this half if actually redable. Go to the next
2048 iteration to divide again and try to read.
2050 We don't handle the other half, because this function only tries
2051 to read a single readable subrange. */
2052 current_begin = first_half_begin;
2053 current_end = first_half_end;
2059 /* The [begin, current_begin) range has been read. */
2061 r.end = current_begin;
2066 /* The [current_end, end) range has been read. */
2067 LONGEST rlen = end - current_end;
2069 r.data = xmalloc (rlen);
2070 memcpy (r.data, buf + current_end - begin, rlen);
2071 r.begin = current_end;
2075 VEC_safe_push(memory_read_result_s, (*result), &r);
2079 free_memory_read_result_vector (void *x)
2081 VEC(memory_read_result_s) *v = x;
2082 memory_read_result_s *current;
2085 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2087 xfree (current->data);
2089 VEC_free (memory_read_result_s, v);
2092 VEC(memory_read_result_s) *
2093 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2095 VEC(memory_read_result_s) *result = 0;
2098 while (xfered < len)
2100 struct mem_region *region = lookup_mem_region (offset + xfered);
2103 /* If there is no explicit region, a fake one should be created. */
2104 gdb_assert (region);
2106 if (region->hi == 0)
2107 rlen = len - xfered;
2109 rlen = region->hi - offset;
2111 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2113 /* Cannot read this region. Note that we can end up here only
2114 if the region is explicitly marked inaccessible, or
2115 'inaccessible-by-default' is in effect. */
2120 LONGEST to_read = min (len - xfered, rlen);
2121 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2123 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2124 (gdb_byte *) buffer,
2125 offset + xfered, to_read);
2126 /* Call an observer, notifying them of the xfer progress? */
2129 /* Got an error reading full chunk. See if maybe we can read
2132 read_whatever_is_readable (ops, offset + xfered,
2133 offset + xfered + to_read, &result);
2138 struct memory_read_result r;
2140 r.begin = offset + xfered;
2141 r.end = r.begin + xfer;
2142 VEC_safe_push (memory_read_result_s, result, &r);
2152 /* An alternative to target_write with progress callbacks. */
2155 target_write_with_progress (struct target_ops *ops,
2156 enum target_object object,
2157 const char *annex, const gdb_byte *buf,
2158 ULONGEST offset, LONGEST len,
2159 void (*progress) (ULONGEST, void *), void *baton)
2163 /* Give the progress callback a chance to set up. */
2165 (*progress) (0, baton);
2167 while (xfered < len)
2169 LONGEST xfer = target_write_partial (ops, object, annex,
2170 (gdb_byte *) buf + xfered,
2171 offset + xfered, len - xfered);
2179 (*progress) (xfer, baton);
2187 /* For docs on target_write see target.h. */
2190 target_write (struct target_ops *ops,
2191 enum target_object object,
2192 const char *annex, const gdb_byte *buf,
2193 ULONGEST offset, LONGEST len)
2195 return target_write_with_progress (ops, object, annex, buf, offset, len,
2199 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2200 the size of the transferred data. PADDING additional bytes are
2201 available in *BUF_P. This is a helper function for
2202 target_read_alloc; see the declaration of that function for more
2206 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2207 const char *annex, gdb_byte **buf_p, int padding)
2209 size_t buf_alloc, buf_pos;
2213 /* This function does not have a length parameter; it reads the
2214 entire OBJECT). Also, it doesn't support objects fetched partly
2215 from one target and partly from another (in a different stratum,
2216 e.g. a core file and an executable). Both reasons make it
2217 unsuitable for reading memory. */
2218 gdb_assert (object != TARGET_OBJECT_MEMORY);
2220 /* Start by reading up to 4K at a time. The target will throttle
2221 this number down if necessary. */
2223 buf = xmalloc (buf_alloc);
2227 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2228 buf_pos, buf_alloc - buf_pos - padding);
2231 /* An error occurred. */
2237 /* Read all there was. */
2247 /* If the buffer is filling up, expand it. */
2248 if (buf_alloc < buf_pos * 2)
2251 buf = xrealloc (buf, buf_alloc);
2258 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2259 the size of the transferred data. See the declaration in "target.h"
2260 function for more information about the return value. */
2263 target_read_alloc (struct target_ops *ops, enum target_object object,
2264 const char *annex, gdb_byte **buf_p)
2266 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2269 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2270 returned as a string, allocated using xmalloc. If an error occurs
2271 or the transfer is unsupported, NULL is returned. Empty objects
2272 are returned as allocated but empty strings. A warning is issued
2273 if the result contains any embedded NUL bytes. */
2276 target_read_stralloc (struct target_ops *ops, enum target_object object,
2280 LONGEST transferred;
2282 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2284 if (transferred < 0)
2287 if (transferred == 0)
2288 return xstrdup ("");
2290 buffer[transferred] = 0;
2291 if (strlen (buffer) < transferred)
2292 warning (_("target object %d, annex %s, "
2293 "contained unexpected null characters"),
2294 (int) object, annex ? annex : "(none)");
2296 return (char *) buffer;
2299 /* Memory transfer methods. */
2302 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2305 /* This method is used to read from an alternate, non-current
2306 target. This read must bypass the overlay support (as symbols
2307 don't match this target), and GDB's internal cache (wrong cache
2308 for this target). */
2309 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2311 memory_error (EIO, addr);
2315 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2316 int len, enum bfd_endian byte_order)
2318 gdb_byte buf[sizeof (ULONGEST)];
2320 gdb_assert (len <= sizeof (buf));
2321 get_target_memory (ops, addr, buf, len);
2322 return extract_unsigned_integer (buf, len, byte_order);
2326 target_insert_breakpoint (struct gdbarch *gdbarch,
2327 struct bp_target_info *bp_tgt)
2329 if (!may_insert_breakpoints)
2331 warning (_("May not insert breakpoints"));
2335 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2339 target_remove_breakpoint (struct gdbarch *gdbarch,
2340 struct bp_target_info *bp_tgt)
2342 /* This is kind of a weird case to handle, but the permission might
2343 have been changed after breakpoints were inserted - in which case
2344 we should just take the user literally and assume that any
2345 breakpoints should be left in place. */
2346 if (!may_insert_breakpoints)
2348 warning (_("May not remove breakpoints"));
2352 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2356 target_info (char *args, int from_tty)
2358 struct target_ops *t;
2359 int has_all_mem = 0;
2361 if (symfile_objfile != NULL)
2362 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2364 for (t = target_stack; t != NULL; t = t->beneath)
2366 if (!(*t->to_has_memory) (t))
2369 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2372 printf_unfiltered (_("\tWhile running this, "
2373 "GDB does not access memory from...\n"));
2374 printf_unfiltered ("%s:\n", t->to_longname);
2375 (t->to_files_info) (t);
2376 has_all_mem = (*t->to_has_all_memory) (t);
2380 /* This function is called before any new inferior is created, e.g.
2381 by running a program, attaching, or connecting to a target.
2382 It cleans up any state from previous invocations which might
2383 change between runs. This is a subset of what target_preopen
2384 resets (things which might change between targets). */
2387 target_pre_inferior (int from_tty)
2389 /* Clear out solib state. Otherwise the solib state of the previous
2390 inferior might have survived and is entirely wrong for the new
2391 target. This has been observed on GNU/Linux using glibc 2.3. How
2403 Cannot access memory at address 0xdeadbeef
2406 /* In some OSs, the shared library list is the same/global/shared
2407 across inferiors. If code is shared between processes, so are
2408 memory regions and features. */
2409 if (!gdbarch_has_global_solist (target_gdbarch))
2411 no_shared_libraries (NULL, from_tty);
2413 invalidate_target_mem_regions ();
2415 target_clear_description ();
2419 /* Callback for iterate_over_inferiors. Gets rid of the given
2423 dispose_inferior (struct inferior *inf, void *args)
2425 struct thread_info *thread;
2427 thread = any_thread_of_process (inf->pid);
2430 switch_to_thread (thread->ptid);
2432 /* Core inferiors actually should be detached, not killed. */
2433 if (target_has_execution)
2436 target_detach (NULL, 0);
2442 /* This is to be called by the open routine before it does
2446 target_preopen (int from_tty)
2450 if (have_inferiors ())
2453 || !have_live_inferiors ()
2454 || query (_("A program is being debugged already. Kill it? ")))
2455 iterate_over_inferiors (dispose_inferior, NULL);
2457 error (_("Program not killed."));
2460 /* Calling target_kill may remove the target from the stack. But if
2461 it doesn't (which seems like a win for UDI), remove it now. */
2462 /* Leave the exec target, though. The user may be switching from a
2463 live process to a core of the same program. */
2464 pop_all_targets_above (file_stratum, 0);
2466 target_pre_inferior (from_tty);
2469 /* Detach a target after doing deferred register stores. */
2472 target_detach (char *args, int from_tty)
2474 struct target_ops* t;
2476 if (gdbarch_has_global_breakpoints (target_gdbarch))
2477 /* Don't remove global breakpoints here. They're removed on
2478 disconnection from the target. */
2481 /* If we're in breakpoints-always-inserted mode, have to remove
2482 them before detaching. */
2483 remove_breakpoints_pid (PIDGET (inferior_ptid));
2485 prepare_for_detach ();
2487 for (t = current_target.beneath; t != NULL; t = t->beneath)
2489 if (t->to_detach != NULL)
2491 t->to_detach (t, args, from_tty);
2493 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2499 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2503 target_disconnect (char *args, int from_tty)
2505 struct target_ops *t;
2507 /* If we're in breakpoints-always-inserted mode or if breakpoints
2508 are global across processes, we have to remove them before
2510 remove_breakpoints ();
2512 for (t = current_target.beneath; t != NULL; t = t->beneath)
2513 if (t->to_disconnect != NULL)
2516 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2518 t->to_disconnect (t, args, from_tty);
2526 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2528 struct target_ops *t;
2530 for (t = current_target.beneath; t != NULL; t = t->beneath)
2532 if (t->to_wait != NULL)
2534 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2538 char *status_string;
2540 status_string = target_waitstatus_to_string (status);
2541 fprintf_unfiltered (gdb_stdlog,
2542 "target_wait (%d, status) = %d, %s\n",
2543 PIDGET (ptid), PIDGET (retval),
2545 xfree (status_string);
2556 target_pid_to_str (ptid_t ptid)
2558 struct target_ops *t;
2560 for (t = current_target.beneath; t != NULL; t = t->beneath)
2562 if (t->to_pid_to_str != NULL)
2563 return (*t->to_pid_to_str) (t, ptid);
2566 return normal_pid_to_str (ptid);
2570 target_thread_name (struct thread_info *info)
2572 struct target_ops *t;
2574 for (t = current_target.beneath; t != NULL; t = t->beneath)
2576 if (t->to_thread_name != NULL)
2577 return (*t->to_thread_name) (info);
2584 target_resume (ptid_t ptid, int step, enum target_signal signal)
2586 struct target_ops *t;
2588 target_dcache_invalidate ();
2590 for (t = current_target.beneath; t != NULL; t = t->beneath)
2592 if (t->to_resume != NULL)
2594 t->to_resume (t, ptid, step, signal);
2596 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2598 step ? "step" : "continue",
2599 target_signal_to_name (signal));
2601 registers_changed_ptid (ptid);
2602 set_executing (ptid, 1);
2603 set_running (ptid, 1);
2604 clear_inline_frame_state (ptid);
2613 target_pass_signals (int numsigs, unsigned char *pass_signals)
2615 struct target_ops *t;
2617 for (t = current_target.beneath; t != NULL; t = t->beneath)
2619 if (t->to_pass_signals != NULL)
2625 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2628 for (i = 0; i < numsigs; i++)
2629 if (pass_signals[i])
2630 fprintf_unfiltered (gdb_stdlog, " %s",
2631 target_signal_to_name (i));
2633 fprintf_unfiltered (gdb_stdlog, " })\n");
2636 (*t->to_pass_signals) (numsigs, pass_signals);
2642 /* Look through the list of possible targets for a target that can
2646 target_follow_fork (int follow_child)
2648 struct target_ops *t;
2650 for (t = current_target.beneath; t != NULL; t = t->beneath)
2652 if (t->to_follow_fork != NULL)
2654 int retval = t->to_follow_fork (t, follow_child);
2657 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2658 follow_child, retval);
2663 /* Some target returned a fork event, but did not know how to follow it. */
2664 internal_error (__FILE__, __LINE__,
2665 _("could not find a target to follow fork"));
2669 target_mourn_inferior (void)
2671 struct target_ops *t;
2673 for (t = current_target.beneath; t != NULL; t = t->beneath)
2675 if (t->to_mourn_inferior != NULL)
2677 t->to_mourn_inferior (t);
2679 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2681 /* We no longer need to keep handles on any of the object files.
2682 Make sure to release them to avoid unnecessarily locking any
2683 of them while we're not actually debugging. */
2684 bfd_cache_close_all ();
2690 internal_error (__FILE__, __LINE__,
2691 _("could not find a target to follow mourn inferior"));
2694 /* Look for a target which can describe architectural features, starting
2695 from TARGET. If we find one, return its description. */
2697 const struct target_desc *
2698 target_read_description (struct target_ops *target)
2700 struct target_ops *t;
2702 for (t = target; t != NULL; t = t->beneath)
2703 if (t->to_read_description != NULL)
2705 const struct target_desc *tdesc;
2707 tdesc = t->to_read_description (t);
2715 /* The default implementation of to_search_memory.
2716 This implements a basic search of memory, reading target memory and
2717 performing the search here (as opposed to performing the search in on the
2718 target side with, for example, gdbserver). */
2721 simple_search_memory (struct target_ops *ops,
2722 CORE_ADDR start_addr, ULONGEST search_space_len,
2723 const gdb_byte *pattern, ULONGEST pattern_len,
2724 CORE_ADDR *found_addrp)
2726 /* NOTE: also defined in find.c testcase. */
2727 #define SEARCH_CHUNK_SIZE 16000
2728 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2729 /* Buffer to hold memory contents for searching. */
2730 gdb_byte *search_buf;
2731 unsigned search_buf_size;
2732 struct cleanup *old_cleanups;
2734 search_buf_size = chunk_size + pattern_len - 1;
2736 /* No point in trying to allocate a buffer larger than the search space. */
2737 if (search_space_len < search_buf_size)
2738 search_buf_size = search_space_len;
2740 search_buf = malloc (search_buf_size);
2741 if (search_buf == NULL)
2742 error (_("Unable to allocate memory to perform the search."));
2743 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2745 /* Prime the search buffer. */
2747 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2748 search_buf, start_addr, search_buf_size) != search_buf_size)
2750 warning (_("Unable to access target memory at %s, halting search."),
2751 hex_string (start_addr));
2752 do_cleanups (old_cleanups);
2756 /* Perform the search.
2758 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2759 When we've scanned N bytes we copy the trailing bytes to the start and
2760 read in another N bytes. */
2762 while (search_space_len >= pattern_len)
2764 gdb_byte *found_ptr;
2765 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2767 found_ptr = memmem (search_buf, nr_search_bytes,
2768 pattern, pattern_len);
2770 if (found_ptr != NULL)
2772 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2774 *found_addrp = found_addr;
2775 do_cleanups (old_cleanups);
2779 /* Not found in this chunk, skip to next chunk. */
2781 /* Don't let search_space_len wrap here, it's unsigned. */
2782 if (search_space_len >= chunk_size)
2783 search_space_len -= chunk_size;
2785 search_space_len = 0;
2787 if (search_space_len >= pattern_len)
2789 unsigned keep_len = search_buf_size - chunk_size;
2790 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2793 /* Copy the trailing part of the previous iteration to the front
2794 of the buffer for the next iteration. */
2795 gdb_assert (keep_len == pattern_len - 1);
2796 memcpy (search_buf, search_buf + chunk_size, keep_len);
2798 nr_to_read = min (search_space_len - keep_len, chunk_size);
2800 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2801 search_buf + keep_len, read_addr,
2802 nr_to_read) != nr_to_read)
2804 warning (_("Unable to access target "
2805 "memory at %s, halting search."),
2806 hex_string (read_addr));
2807 do_cleanups (old_cleanups);
2811 start_addr += chunk_size;
2817 do_cleanups (old_cleanups);
2821 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2822 sequence of bytes in PATTERN with length PATTERN_LEN.
2824 The result is 1 if found, 0 if not found, and -1 if there was an error
2825 requiring halting of the search (e.g. memory read error).
2826 If the pattern is found the address is recorded in FOUND_ADDRP. */
2829 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2830 const gdb_byte *pattern, ULONGEST pattern_len,
2831 CORE_ADDR *found_addrp)
2833 struct target_ops *t;
2836 /* We don't use INHERIT to set current_target.to_search_memory,
2837 so we have to scan the target stack and handle targetdebug
2841 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2842 hex_string (start_addr));
2844 for (t = current_target.beneath; t != NULL; t = t->beneath)
2845 if (t->to_search_memory != NULL)
2850 found = t->to_search_memory (t, start_addr, search_space_len,
2851 pattern, pattern_len, found_addrp);
2855 /* If a special version of to_search_memory isn't available, use the
2857 found = simple_search_memory (current_target.beneath,
2858 start_addr, search_space_len,
2859 pattern, pattern_len, found_addrp);
2863 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2868 /* Look through the currently pushed targets. If none of them will
2869 be able to restart the currently running process, issue an error
2873 target_require_runnable (void)
2875 struct target_ops *t;
2877 for (t = target_stack; t != NULL; t = t->beneath)
2879 /* If this target knows how to create a new program, then
2880 assume we will still be able to after killing the current
2881 one. Either killing and mourning will not pop T, or else
2882 find_default_run_target will find it again. */
2883 if (t->to_create_inferior != NULL)
2886 /* Do not worry about thread_stratum targets that can not
2887 create inferiors. Assume they will be pushed again if
2888 necessary, and continue to the process_stratum. */
2889 if (t->to_stratum == thread_stratum
2890 || t->to_stratum == arch_stratum)
2893 error (_("The \"%s\" target does not support \"run\". "
2894 "Try \"help target\" or \"continue\"."),
2898 /* This function is only called if the target is running. In that
2899 case there should have been a process_stratum target and it
2900 should either know how to create inferiors, or not... */
2901 internal_error (__FILE__, __LINE__, _("No targets found"));
2904 /* Look through the list of possible targets for a target that can
2905 execute a run or attach command without any other data. This is
2906 used to locate the default process stratum.
2908 If DO_MESG is not NULL, the result is always valid (error() is
2909 called for errors); else, return NULL on error. */
2911 static struct target_ops *
2912 find_default_run_target (char *do_mesg)
2914 struct target_ops **t;
2915 struct target_ops *runable = NULL;
2920 for (t = target_structs; t < target_structs + target_struct_size;
2923 if ((*t)->to_can_run && target_can_run (*t))
2933 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2942 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2944 struct target_ops *t;
2946 t = find_default_run_target ("attach");
2947 (t->to_attach) (t, args, from_tty);
2952 find_default_create_inferior (struct target_ops *ops,
2953 char *exec_file, char *allargs, char **env,
2956 struct target_ops *t;
2958 t = find_default_run_target ("run");
2959 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2964 find_default_can_async_p (void)
2966 struct target_ops *t;
2968 /* This may be called before the target is pushed on the stack;
2969 look for the default process stratum. If there's none, gdb isn't
2970 configured with a native debugger, and target remote isn't
2972 t = find_default_run_target (NULL);
2973 if (t && t->to_can_async_p)
2974 return (t->to_can_async_p) ();
2979 find_default_is_async_p (void)
2981 struct target_ops *t;
2983 /* This may be called before the target is pushed on the stack;
2984 look for the default process stratum. If there's none, gdb isn't
2985 configured with a native debugger, and target remote isn't
2987 t = find_default_run_target (NULL);
2988 if (t && t->to_is_async_p)
2989 return (t->to_is_async_p) ();
2994 find_default_supports_non_stop (void)
2996 struct target_ops *t;
2998 t = find_default_run_target (NULL);
2999 if (t && t->to_supports_non_stop)
3000 return (t->to_supports_non_stop) ();
3005 target_supports_non_stop (void)
3007 struct target_ops *t;
3009 for (t = ¤t_target; t != NULL; t = t->beneath)
3010 if (t->to_supports_non_stop)
3011 return t->to_supports_non_stop ();
3018 target_get_osdata (const char *type)
3020 struct target_ops *t;
3022 /* If we're already connected to something that can get us OS
3023 related data, use it. Otherwise, try using the native
3025 if (current_target.to_stratum >= process_stratum)
3026 t = current_target.beneath;
3028 t = find_default_run_target ("get OS data");
3033 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3036 /* Determine the current address space of thread PTID. */
3038 struct address_space *
3039 target_thread_address_space (ptid_t ptid)
3041 struct address_space *aspace;
3042 struct inferior *inf;
3043 struct target_ops *t;
3045 for (t = current_target.beneath; t != NULL; t = t->beneath)
3047 if (t->to_thread_address_space != NULL)
3049 aspace = t->to_thread_address_space (t, ptid);
3050 gdb_assert (aspace);
3053 fprintf_unfiltered (gdb_stdlog,
3054 "target_thread_address_space (%s) = %d\n",
3055 target_pid_to_str (ptid),
3056 address_space_num (aspace));
3061 /* Fall-back to the "main" address space of the inferior. */
3062 inf = find_inferior_pid (ptid_get_pid (ptid));
3064 if (inf == NULL || inf->aspace == NULL)
3065 internal_error (__FILE__, __LINE__,
3066 _("Can't determine the current "
3067 "address space of thread %s\n"),
3068 target_pid_to_str (ptid));
3074 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3076 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
3080 default_watchpoint_addr_within_range (struct target_ops *target,
3082 CORE_ADDR start, int length)
3084 return addr >= start && addr < start + length;
3087 static struct gdbarch *
3088 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3090 return target_gdbarch;
3106 return_minus_one (void)
3111 /* Find a single runnable target in the stack and return it. If for
3112 some reason there is more than one, return NULL. */
3115 find_run_target (void)
3117 struct target_ops **t;
3118 struct target_ops *runable = NULL;
3123 for (t = target_structs; t < target_structs + target_struct_size; ++t)
3125 if ((*t)->to_can_run && target_can_run (*t))
3132 return (count == 1 ? runable : NULL);
3136 * Find the next target down the stack from the specified target.
3140 find_target_beneath (struct target_ops *t)
3146 /* The inferior process has died. Long live the inferior! */
3149 generic_mourn_inferior (void)
3153 ptid = inferior_ptid;
3154 inferior_ptid = null_ptid;
3156 if (!ptid_equal (ptid, null_ptid))
3158 int pid = ptid_get_pid (ptid);
3159 exit_inferior (pid);
3162 breakpoint_init_inferior (inf_exited);
3163 registers_changed ();
3165 reopen_exec_file ();
3166 reinit_frame_cache ();
3168 if (deprecated_detach_hook)
3169 deprecated_detach_hook ();
3172 /* Helper function for child_wait and the derivatives of child_wait.
3173 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3174 translation of that in OURSTATUS. */
3176 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
3178 if (WIFEXITED (hoststatus))
3180 ourstatus->kind = TARGET_WAITKIND_EXITED;
3181 ourstatus->value.integer = WEXITSTATUS (hoststatus);
3183 else if (!WIFSTOPPED (hoststatus))
3185 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3186 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
3190 ourstatus->kind = TARGET_WAITKIND_STOPPED;
3191 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
3195 /* Convert a normal process ID to a string. Returns the string in a
3199 normal_pid_to_str (ptid_t ptid)
3201 static char buf[32];
3203 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3208 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3210 return normal_pid_to_str (ptid);
3213 /* Error-catcher for target_find_memory_regions. */
3215 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3217 error (_("Command not implemented for this target."));
3221 /* Error-catcher for target_make_corefile_notes. */
3223 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3225 error (_("Command not implemented for this target."));
3229 /* Error-catcher for target_get_bookmark. */
3231 dummy_get_bookmark (char *ignore1, int ignore2)
3237 /* Error-catcher for target_goto_bookmark. */
3239 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3244 /* Set up the handful of non-empty slots needed by the dummy target
3248 init_dummy_target (void)
3250 dummy_target.to_shortname = "None";
3251 dummy_target.to_longname = "None";
3252 dummy_target.to_doc = "";
3253 dummy_target.to_attach = find_default_attach;
3254 dummy_target.to_detach =
3255 (void (*)(struct target_ops *, char *, int))target_ignore;
3256 dummy_target.to_create_inferior = find_default_create_inferior;
3257 dummy_target.to_can_async_p = find_default_can_async_p;
3258 dummy_target.to_is_async_p = find_default_is_async_p;
3259 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3260 dummy_target.to_pid_to_str = dummy_pid_to_str;
3261 dummy_target.to_stratum = dummy_stratum;
3262 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3263 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3264 dummy_target.to_get_bookmark = dummy_get_bookmark;
3265 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3266 dummy_target.to_xfer_partial = default_xfer_partial;
3267 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3268 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3269 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3270 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3271 dummy_target.to_has_execution
3272 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3273 dummy_target.to_stopped_by_watchpoint = return_zero;
3274 dummy_target.to_stopped_data_address =
3275 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3276 dummy_target.to_magic = OPS_MAGIC;
3280 debug_to_open (char *args, int from_tty)
3282 debug_target.to_open (args, from_tty);
3284 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3288 target_close (struct target_ops *targ, int quitting)
3290 if (targ->to_xclose != NULL)
3291 targ->to_xclose (targ, quitting);
3292 else if (targ->to_close != NULL)
3293 targ->to_close (quitting);
3296 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3300 target_attach (char *args, int from_tty)
3302 struct target_ops *t;
3304 for (t = current_target.beneath; t != NULL; t = t->beneath)
3306 if (t->to_attach != NULL)
3308 t->to_attach (t, args, from_tty);
3310 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3316 internal_error (__FILE__, __LINE__,
3317 _("could not find a target to attach"));
3321 target_thread_alive (ptid_t ptid)
3323 struct target_ops *t;
3325 for (t = current_target.beneath; t != NULL; t = t->beneath)
3327 if (t->to_thread_alive != NULL)
3331 retval = t->to_thread_alive (t, ptid);
3333 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3334 PIDGET (ptid), retval);
3344 target_find_new_threads (void)
3346 struct target_ops *t;
3348 for (t = current_target.beneath; t != NULL; t = t->beneath)
3350 if (t->to_find_new_threads != NULL)
3352 t->to_find_new_threads (t);
3354 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3362 target_stop (ptid_t ptid)
3366 warning (_("May not interrupt or stop the target, ignoring attempt"));
3370 (*current_target.to_stop) (ptid);
3374 debug_to_post_attach (int pid)
3376 debug_target.to_post_attach (pid);
3378 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3381 /* Return a pretty printed form of target_waitstatus.
3382 Space for the result is malloc'd, caller must free. */
3385 target_waitstatus_to_string (const struct target_waitstatus *ws)
3387 const char *kind_str = "status->kind = ";
3391 case TARGET_WAITKIND_EXITED:
3392 return xstrprintf ("%sexited, status = %d",
3393 kind_str, ws->value.integer);
3394 case TARGET_WAITKIND_STOPPED:
3395 return xstrprintf ("%sstopped, signal = %s",
3396 kind_str, target_signal_to_name (ws->value.sig));
3397 case TARGET_WAITKIND_SIGNALLED:
3398 return xstrprintf ("%ssignalled, signal = %s",
3399 kind_str, target_signal_to_name (ws->value.sig));
3400 case TARGET_WAITKIND_LOADED:
3401 return xstrprintf ("%sloaded", kind_str);
3402 case TARGET_WAITKIND_FORKED:
3403 return xstrprintf ("%sforked", kind_str);
3404 case TARGET_WAITKIND_VFORKED:
3405 return xstrprintf ("%svforked", kind_str);
3406 case TARGET_WAITKIND_EXECD:
3407 return xstrprintf ("%sexecd", kind_str);
3408 case TARGET_WAITKIND_SYSCALL_ENTRY:
3409 return xstrprintf ("%sentered syscall", kind_str);
3410 case TARGET_WAITKIND_SYSCALL_RETURN:
3411 return xstrprintf ("%sexited syscall", kind_str);
3412 case TARGET_WAITKIND_SPURIOUS:
3413 return xstrprintf ("%sspurious", kind_str);
3414 case TARGET_WAITKIND_IGNORE:
3415 return xstrprintf ("%signore", kind_str);
3416 case TARGET_WAITKIND_NO_HISTORY:
3417 return xstrprintf ("%sno-history", kind_str);
3419 return xstrprintf ("%sunknown???", kind_str);
3424 debug_print_register (const char * func,
3425 struct regcache *regcache, int regno)
3427 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3429 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3430 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3431 && gdbarch_register_name (gdbarch, regno) != NULL
3432 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3433 fprintf_unfiltered (gdb_stdlog, "(%s)",
3434 gdbarch_register_name (gdbarch, regno));
3436 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3437 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3439 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3440 int i, size = register_size (gdbarch, regno);
3441 unsigned char buf[MAX_REGISTER_SIZE];
3443 regcache_raw_collect (regcache, regno, buf);
3444 fprintf_unfiltered (gdb_stdlog, " = ");
3445 for (i = 0; i < size; i++)
3447 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3449 if (size <= sizeof (LONGEST))
3451 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3453 fprintf_unfiltered (gdb_stdlog, " %s %s",
3454 core_addr_to_string_nz (val), plongest (val));
3457 fprintf_unfiltered (gdb_stdlog, "\n");
3461 target_fetch_registers (struct regcache *regcache, int regno)
3463 struct target_ops *t;
3465 for (t = current_target.beneath; t != NULL; t = t->beneath)
3467 if (t->to_fetch_registers != NULL)
3469 t->to_fetch_registers (t, regcache, regno);
3471 debug_print_register ("target_fetch_registers", regcache, regno);
3478 target_store_registers (struct regcache *regcache, int regno)
3480 struct target_ops *t;
3482 if (!may_write_registers)
3483 error (_("Writing to registers is not allowed (regno %d)"), regno);
3485 for (t = current_target.beneath; t != NULL; t = t->beneath)
3487 if (t->to_store_registers != NULL)
3489 t->to_store_registers (t, regcache, regno);
3492 debug_print_register ("target_store_registers", regcache, regno);
3502 target_core_of_thread (ptid_t ptid)
3504 struct target_ops *t;
3506 for (t = current_target.beneath; t != NULL; t = t->beneath)
3508 if (t->to_core_of_thread != NULL)
3510 int retval = t->to_core_of_thread (t, ptid);
3513 fprintf_unfiltered (gdb_stdlog,
3514 "target_core_of_thread (%d) = %d\n",
3515 PIDGET (ptid), retval);
3524 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3526 struct target_ops *t;
3528 for (t = current_target.beneath; t != NULL; t = t->beneath)
3530 if (t->to_verify_memory != NULL)
3532 int retval = t->to_verify_memory (t, data, memaddr, size);
3535 fprintf_unfiltered (gdb_stdlog,
3536 "target_verify_memory (%s, %s) = %d\n",
3537 paddress (target_gdbarch, memaddr),
3547 /* The documentation for this function is in its prototype declaration in
3551 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3553 struct target_ops *t;
3555 for (t = current_target.beneath; t != NULL; t = t->beneath)
3556 if (t->to_insert_mask_watchpoint != NULL)
3560 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
3563 fprintf_unfiltered (gdb_stdlog, "\
3564 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3565 core_addr_to_string (addr),
3566 core_addr_to_string (mask), rw, ret);
3574 /* The documentation for this function is in its prototype declaration in
3578 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3580 struct target_ops *t;
3582 for (t = current_target.beneath; t != NULL; t = t->beneath)
3583 if (t->to_remove_mask_watchpoint != NULL)
3587 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
3590 fprintf_unfiltered (gdb_stdlog, "\
3591 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3592 core_addr_to_string (addr),
3593 core_addr_to_string (mask), rw, ret);
3601 /* The documentation for this function is in its prototype declaration
3605 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3607 struct target_ops *t;
3609 for (t = current_target.beneath; t != NULL; t = t->beneath)
3610 if (t->to_masked_watch_num_registers != NULL)
3611 return t->to_masked_watch_num_registers (t, addr, mask);
3616 /* The documentation for this function is in its prototype declaration
3620 target_ranged_break_num_registers (void)
3622 struct target_ops *t;
3624 for (t = current_target.beneath; t != NULL; t = t->beneath)
3625 if (t->to_ranged_break_num_registers != NULL)
3626 return t->to_ranged_break_num_registers (t);
3632 debug_to_prepare_to_store (struct regcache *regcache)
3634 debug_target.to_prepare_to_store (regcache);
3636 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3640 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3641 int write, struct mem_attrib *attrib,
3642 struct target_ops *target)
3646 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3649 fprintf_unfiltered (gdb_stdlog,
3650 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3651 paddress (target_gdbarch, memaddr), len,
3652 write ? "write" : "read", retval);
3658 fputs_unfiltered (", bytes =", gdb_stdlog);
3659 for (i = 0; i < retval; i++)
3661 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3663 if (targetdebug < 2 && i > 0)
3665 fprintf_unfiltered (gdb_stdlog, " ...");
3668 fprintf_unfiltered (gdb_stdlog, "\n");
3671 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3675 fputc_unfiltered ('\n', gdb_stdlog);
3681 debug_to_files_info (struct target_ops *target)
3683 debug_target.to_files_info (target);
3685 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3689 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3690 struct bp_target_info *bp_tgt)
3694 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3696 fprintf_unfiltered (gdb_stdlog,
3697 "target_insert_breakpoint (%s, xxx) = %ld\n",
3698 core_addr_to_string (bp_tgt->placed_address),
3699 (unsigned long) retval);
3704 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3705 struct bp_target_info *bp_tgt)
3709 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3711 fprintf_unfiltered (gdb_stdlog,
3712 "target_remove_breakpoint (%s, xxx) = %ld\n",
3713 core_addr_to_string (bp_tgt->placed_address),
3714 (unsigned long) retval);
3719 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3723 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3725 fprintf_unfiltered (gdb_stdlog,
3726 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3727 (unsigned long) type,
3728 (unsigned long) cnt,
3729 (unsigned long) from_tty,
3730 (unsigned long) retval);
3735 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3739 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3741 fprintf_unfiltered (gdb_stdlog,
3742 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3743 core_addr_to_string (addr), (unsigned long) len,
3744 core_addr_to_string (retval));
3749 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3750 struct expression *cond)
3754 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3757 fprintf_unfiltered (gdb_stdlog,
3758 "target_can_accel_watchpoint_condition "
3759 "(%s, %d, %d, %s) = %ld\n",
3760 core_addr_to_string (addr), len, rw,
3761 host_address_to_string (cond), (unsigned long) retval);
3766 debug_to_stopped_by_watchpoint (void)
3770 retval = debug_target.to_stopped_by_watchpoint ();
3772 fprintf_unfiltered (gdb_stdlog,
3773 "target_stopped_by_watchpoint () = %ld\n",
3774 (unsigned long) retval);
3779 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3783 retval = debug_target.to_stopped_data_address (target, addr);
3785 fprintf_unfiltered (gdb_stdlog,
3786 "target_stopped_data_address ([%s]) = %ld\n",
3787 core_addr_to_string (*addr),
3788 (unsigned long)retval);
3793 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3795 CORE_ADDR start, int length)
3799 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3802 fprintf_filtered (gdb_stdlog,
3803 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3804 core_addr_to_string (addr), core_addr_to_string (start),
3810 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3811 struct bp_target_info *bp_tgt)
3815 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3817 fprintf_unfiltered (gdb_stdlog,
3818 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3819 core_addr_to_string (bp_tgt->placed_address),
3820 (unsigned long) retval);
3825 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3826 struct bp_target_info *bp_tgt)
3830 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3832 fprintf_unfiltered (gdb_stdlog,
3833 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3834 core_addr_to_string (bp_tgt->placed_address),
3835 (unsigned long) retval);
3840 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3841 struct expression *cond)
3845 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3847 fprintf_unfiltered (gdb_stdlog,
3848 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3849 core_addr_to_string (addr), len, type,
3850 host_address_to_string (cond), (unsigned long) retval);
3855 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3856 struct expression *cond)
3860 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3862 fprintf_unfiltered (gdb_stdlog,
3863 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3864 core_addr_to_string (addr), len, type,
3865 host_address_to_string (cond), (unsigned long) retval);
3870 debug_to_terminal_init (void)
3872 debug_target.to_terminal_init ();
3874 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3878 debug_to_terminal_inferior (void)
3880 debug_target.to_terminal_inferior ();
3882 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3886 debug_to_terminal_ours_for_output (void)
3888 debug_target.to_terminal_ours_for_output ();
3890 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3894 debug_to_terminal_ours (void)
3896 debug_target.to_terminal_ours ();
3898 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3902 debug_to_terminal_save_ours (void)
3904 debug_target.to_terminal_save_ours ();
3906 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3910 debug_to_terminal_info (char *arg, int from_tty)
3912 debug_target.to_terminal_info (arg, from_tty);
3914 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3919 debug_to_load (char *args, int from_tty)
3921 debug_target.to_load (args, from_tty);
3923 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3927 debug_to_post_startup_inferior (ptid_t ptid)
3929 debug_target.to_post_startup_inferior (ptid);
3931 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3936 debug_to_insert_fork_catchpoint (int pid)
3940 retval = debug_target.to_insert_fork_catchpoint (pid);
3942 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
3949 debug_to_remove_fork_catchpoint (int pid)
3953 retval = debug_target.to_remove_fork_catchpoint (pid);
3955 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3962 debug_to_insert_vfork_catchpoint (int pid)
3966 retval = debug_target.to_insert_vfork_catchpoint (pid);
3968 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
3975 debug_to_remove_vfork_catchpoint (int pid)
3979 retval = debug_target.to_remove_vfork_catchpoint (pid);
3981 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3988 debug_to_insert_exec_catchpoint (int pid)
3992 retval = debug_target.to_insert_exec_catchpoint (pid);
3994 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4001 debug_to_remove_exec_catchpoint (int pid)
4005 retval = debug_target.to_remove_exec_catchpoint (pid);
4007 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4014 debug_to_has_exited (int pid, int wait_status, int *exit_status)
4018 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
4020 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4021 pid, wait_status, *exit_status, has_exited);
4027 debug_to_can_run (void)
4031 retval = debug_target.to_can_run ();
4033 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4038 static struct gdbarch *
4039 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4041 struct gdbarch *retval;
4043 retval = debug_target.to_thread_architecture (ops, ptid);
4045 fprintf_unfiltered (gdb_stdlog,
4046 "target_thread_architecture (%s) = %s [%s]\n",
4047 target_pid_to_str (ptid),
4048 host_address_to_string (retval),
4049 gdbarch_bfd_arch_info (retval)->printable_name);
4054 debug_to_stop (ptid_t ptid)
4056 debug_target.to_stop (ptid);
4058 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4059 target_pid_to_str (ptid));
4063 debug_to_rcmd (char *command,
4064 struct ui_file *outbuf)
4066 debug_target.to_rcmd (command, outbuf);
4067 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4071 debug_to_pid_to_exec_file (int pid)
4075 exec_file = debug_target.to_pid_to_exec_file (pid);
4077 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4084 setup_target_debug (void)
4086 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4088 current_target.to_open = debug_to_open;
4089 current_target.to_post_attach = debug_to_post_attach;
4090 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4091 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4092 current_target.to_files_info = debug_to_files_info;
4093 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4094 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4095 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4096 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4097 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4098 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4099 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4100 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4101 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4102 current_target.to_watchpoint_addr_within_range
4103 = debug_to_watchpoint_addr_within_range;
4104 current_target.to_region_ok_for_hw_watchpoint
4105 = debug_to_region_ok_for_hw_watchpoint;
4106 current_target.to_can_accel_watchpoint_condition
4107 = debug_to_can_accel_watchpoint_condition;
4108 current_target.to_terminal_init = debug_to_terminal_init;
4109 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4110 current_target.to_terminal_ours_for_output
4111 = debug_to_terminal_ours_for_output;
4112 current_target.to_terminal_ours = debug_to_terminal_ours;
4113 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4114 current_target.to_terminal_info = debug_to_terminal_info;
4115 current_target.to_load = debug_to_load;
4116 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4117 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4118 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4119 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4120 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4121 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4122 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4123 current_target.to_has_exited = debug_to_has_exited;
4124 current_target.to_can_run = debug_to_can_run;
4125 current_target.to_stop = debug_to_stop;
4126 current_target.to_rcmd = debug_to_rcmd;
4127 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4128 current_target.to_thread_architecture = debug_to_thread_architecture;
4132 static char targ_desc[] =
4133 "Names of targets and files being debugged.\nShows the entire \
4134 stack of targets currently in use (including the exec-file,\n\
4135 core-file, and process, if any), as well as the symbol file name.";
4138 do_monitor_command (char *cmd,
4141 if ((current_target.to_rcmd
4142 == (void (*) (char *, struct ui_file *)) tcomplain)
4143 || (current_target.to_rcmd == debug_to_rcmd
4144 && (debug_target.to_rcmd
4145 == (void (*) (char *, struct ui_file *)) tcomplain)))
4146 error (_("\"monitor\" command not supported by this target."));
4147 target_rcmd (cmd, gdb_stdtarg);
4150 /* Print the name of each layers of our target stack. */
4153 maintenance_print_target_stack (char *cmd, int from_tty)
4155 struct target_ops *t;
4157 printf_filtered (_("The current target stack is:\n"));
4159 for (t = target_stack; t != NULL; t = t->beneath)
4161 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4165 /* Controls if async mode is permitted. */
4166 int target_async_permitted = 0;
4168 /* The set command writes to this variable. If the inferior is
4169 executing, linux_nat_async_permitted is *not* updated. */
4170 static int target_async_permitted_1 = 0;
4173 set_maintenance_target_async_permitted (char *args, int from_tty,
4174 struct cmd_list_element *c)
4176 if (have_live_inferiors ())
4178 target_async_permitted_1 = target_async_permitted;
4179 error (_("Cannot change this setting while the inferior is running."));
4182 target_async_permitted = target_async_permitted_1;
4186 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
4187 struct cmd_list_element *c,
4190 fprintf_filtered (file,
4191 _("Controlling the inferior in "
4192 "asynchronous mode is %s.\n"), value);
4195 /* Temporary copies of permission settings. */
4197 static int may_write_registers_1 = 1;
4198 static int may_write_memory_1 = 1;
4199 static int may_insert_breakpoints_1 = 1;
4200 static int may_insert_tracepoints_1 = 1;
4201 static int may_insert_fast_tracepoints_1 = 1;
4202 static int may_stop_1 = 1;
4204 /* Make the user-set values match the real values again. */
4207 update_target_permissions (void)
4209 may_write_registers_1 = may_write_registers;
4210 may_write_memory_1 = may_write_memory;
4211 may_insert_breakpoints_1 = may_insert_breakpoints;
4212 may_insert_tracepoints_1 = may_insert_tracepoints;
4213 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4214 may_stop_1 = may_stop;
4217 /* The one function handles (most of) the permission flags in the same
4221 set_target_permissions (char *args, int from_tty,
4222 struct cmd_list_element *c)
4224 if (target_has_execution)
4226 update_target_permissions ();
4227 error (_("Cannot change this setting while the inferior is running."));
4230 /* Make the real values match the user-changed values. */
4231 may_write_registers = may_write_registers_1;
4232 may_insert_breakpoints = may_insert_breakpoints_1;
4233 may_insert_tracepoints = may_insert_tracepoints_1;
4234 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4235 may_stop = may_stop_1;
4236 update_observer_mode ();
4239 /* Set memory write permission independently of observer mode. */
4242 set_write_memory_permission (char *args, int from_tty,
4243 struct cmd_list_element *c)
4245 /* Make the real values match the user-changed values. */
4246 may_write_memory = may_write_memory_1;
4247 update_observer_mode ();
4252 initialize_targets (void)
4254 init_dummy_target ();
4255 push_target (&dummy_target);
4257 add_info ("target", target_info, targ_desc);
4258 add_info ("files", target_info, targ_desc);
4260 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4261 Set target debugging."), _("\
4262 Show target debugging."), _("\
4263 When non-zero, target debugging is enabled. Higher numbers are more\n\
4264 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4268 &setdebuglist, &showdebuglist);
4270 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4271 &trust_readonly, _("\
4272 Set mode for reading from readonly sections."), _("\
4273 Show mode for reading from readonly sections."), _("\
4274 When this mode is on, memory reads from readonly sections (such as .text)\n\
4275 will be read from the object file instead of from the target. This will\n\
4276 result in significant performance improvement for remote targets."),
4278 show_trust_readonly,
4279 &setlist, &showlist);
4281 add_com ("monitor", class_obscure, do_monitor_command,
4282 _("Send a command to the remote monitor (remote targets only)."));
4284 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4285 _("Print the name of each layer of the internal target stack."),
4286 &maintenanceprintlist);
4288 add_setshow_boolean_cmd ("target-async", no_class,
4289 &target_async_permitted_1, _("\
4290 Set whether gdb controls the inferior in asynchronous mode."), _("\
4291 Show whether gdb controls the inferior in asynchronous mode."), _("\
4292 Tells gdb whether to control the inferior in asynchronous mode."),
4293 set_maintenance_target_async_permitted,
4294 show_maintenance_target_async_permitted,
4298 add_setshow_boolean_cmd ("stack-cache", class_support,
4299 &stack_cache_enabled_p_1, _("\
4300 Set cache use for stack access."), _("\
4301 Show cache use for stack access."), _("\
4302 When on, use the data cache for all stack access, regardless of any\n\
4303 configured memory regions. This improves remote performance significantly.\n\
4304 By default, caching for stack access is on."),
4305 set_stack_cache_enabled_p,
4306 show_stack_cache_enabled_p,
4307 &setlist, &showlist);
4309 add_setshow_boolean_cmd ("may-write-registers", class_support,
4310 &may_write_registers_1, _("\
4311 Set permission to write into registers."), _("\
4312 Show permission to write into registers."), _("\
4313 When this permission is on, GDB may write into the target's registers.\n\
4314 Otherwise, any sort of write attempt will result in an error."),
4315 set_target_permissions, NULL,
4316 &setlist, &showlist);
4318 add_setshow_boolean_cmd ("may-write-memory", class_support,
4319 &may_write_memory_1, _("\
4320 Set permission to write into target memory."), _("\
4321 Show permission to write into target memory."), _("\
4322 When this permission is on, GDB may write into the target's memory.\n\
4323 Otherwise, any sort of write attempt will result in an error."),
4324 set_write_memory_permission, NULL,
4325 &setlist, &showlist);
4327 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4328 &may_insert_breakpoints_1, _("\
4329 Set permission to insert breakpoints in the target."), _("\
4330 Show permission to insert breakpoints in the target."), _("\
4331 When this permission is on, GDB may insert breakpoints in the program.\n\
4332 Otherwise, any sort of insertion attempt will result in an error."),
4333 set_target_permissions, NULL,
4334 &setlist, &showlist);
4336 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4337 &may_insert_tracepoints_1, _("\
4338 Set permission to insert tracepoints in the target."), _("\
4339 Show permission to insert tracepoints in the target."), _("\
4340 When this permission is on, GDB may insert tracepoints in the program.\n\
4341 Otherwise, any sort of insertion attempt will result in an error."),
4342 set_target_permissions, NULL,
4343 &setlist, &showlist);
4345 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4346 &may_insert_fast_tracepoints_1, _("\
4347 Set permission to insert fast tracepoints in the target."), _("\
4348 Show permission to insert fast tracepoints in the target."), _("\
4349 When this permission is on, GDB may insert fast tracepoints.\n\
4350 Otherwise, any sort of insertion attempt will result in an error."),
4351 set_target_permissions, NULL,
4352 &setlist, &showlist);
4354 add_setshow_boolean_cmd ("may-interrupt", class_support,
4356 Set permission to interrupt or signal the target."), _("\
4357 Show permission to interrupt or signal the target."), _("\
4358 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4359 Otherwise, any attempt to interrupt or stop will be ignored."),
4360 set_target_permissions, NULL,
4361 &setlist, &showlist);
4364 target_dcache = dcache_init ();