1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops *,
53 CORE_ADDR, CORE_ADDR, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
57 static int nosymbol (char *, CORE_ADDR *);
59 static void tcomplain (void) ATTRIBUTE_NORETURN;
61 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
63 static int return_zero (void);
65 static int return_one (void);
67 static int return_minus_one (void);
69 void target_ignore (void);
71 static void target_command (char *, int);
73 static struct target_ops *find_default_run_target (char *);
75 static LONGEST default_xfer_partial (struct target_ops *ops,
76 enum target_object object,
77 const char *annex, gdb_byte *readbuf,
78 const gdb_byte *writebuf,
79 ULONGEST offset, LONGEST len);
81 static LONGEST current_xfer_partial (struct target_ops *ops,
82 enum target_object object,
83 const char *annex, gdb_byte *readbuf,
84 const gdb_byte *writebuf,
85 ULONGEST offset, LONGEST len);
87 static LONGEST target_xfer_partial (struct target_ops *ops,
88 enum target_object object,
90 void *readbuf, const void *writebuf,
91 ULONGEST offset, LONGEST len);
93 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
96 static void init_dummy_target (void);
98 static struct target_ops debug_target;
100 static void debug_to_open (char *, int);
102 static void debug_to_prepare_to_store (struct regcache *);
104 static void debug_to_files_info (struct target_ops *);
106 static int debug_to_insert_breakpoint (struct gdbarch *,
107 struct bp_target_info *);
109 static int debug_to_remove_breakpoint (struct gdbarch *,
110 struct bp_target_info *);
112 static int debug_to_can_use_hw_breakpoint (int, int, int);
114 static int debug_to_insert_hw_breakpoint (struct gdbarch *,
115 struct bp_target_info *);
117 static int debug_to_remove_hw_breakpoint (struct gdbarch *,
118 struct bp_target_info *);
120 static int debug_to_insert_watchpoint (CORE_ADDR, int, int,
121 struct expression *);
123 static int debug_to_remove_watchpoint (CORE_ADDR, int, int,
124 struct expression *);
126 static int debug_to_stopped_by_watchpoint (void);
128 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
130 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
131 CORE_ADDR, CORE_ADDR, int);
133 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
135 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int,
136 struct expression *);
138 static void debug_to_terminal_init (void);
140 static void debug_to_terminal_inferior (void);
142 static void debug_to_terminal_ours_for_output (void);
144 static void debug_to_terminal_save_ours (void);
146 static void debug_to_terminal_ours (void);
148 static void debug_to_terminal_info (char *, int);
150 static void debug_to_load (char *, int);
152 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
154 static int debug_to_can_run (void);
156 static void debug_to_notice_signals (ptid_t);
158 static void debug_to_stop (ptid_t);
160 /* Pointer to array of target architecture structures; the size of the
161 array; the current index into the array; the allocated size of the
163 struct target_ops **target_structs;
164 unsigned target_struct_size;
165 unsigned target_struct_index;
166 unsigned target_struct_allocsize;
167 #define DEFAULT_ALLOCSIZE 10
169 /* The initial current target, so that there is always a semi-valid
172 static struct target_ops dummy_target;
174 /* Top of target stack. */
176 static struct target_ops *target_stack;
178 /* The target structure we are currently using to talk to a process
179 or file or whatever "inferior" we have. */
181 struct target_ops current_target;
183 /* Command list for target. */
185 static struct cmd_list_element *targetlist = NULL;
187 /* Nonzero if we should trust readonly sections from the
188 executable when reading memory. */
190 static int trust_readonly = 0;
192 /* Nonzero if we should show true memory content including
193 memory breakpoint inserted by gdb. */
195 static int show_memory_breakpoints = 0;
197 /* These globals control whether GDB attempts to perform these
198 operations; they are useful for targets that need to prevent
199 inadvertant disruption, such as in non-stop mode. */
201 int may_write_registers = 1;
203 int may_write_memory = 1;
205 int may_insert_breakpoints = 1;
207 int may_insert_tracepoints = 1;
209 int may_insert_fast_tracepoints = 1;
213 /* Non-zero if we want to see trace of target level stuff. */
215 static int targetdebug = 0;
217 show_targetdebug (struct ui_file *file, int from_tty,
218 struct cmd_list_element *c, const char *value)
220 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
223 static void setup_target_debug (void);
225 /* The option sets this. */
226 static int stack_cache_enabled_p_1 = 1;
227 /* And set_stack_cache_enabled_p updates this.
228 The reason for the separation is so that we don't flush the cache for
229 on->on transitions. */
230 static int stack_cache_enabled_p = 1;
232 /* This is called *after* the stack-cache has been set.
233 Flush the cache for off->on and on->off transitions.
234 There's no real need to flush the cache for on->off transitions,
235 except cleanliness. */
238 set_stack_cache_enabled_p (char *args, int from_tty,
239 struct cmd_list_element *c)
241 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
242 target_dcache_invalidate ();
244 stack_cache_enabled_p = stack_cache_enabled_p_1;
248 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
249 struct cmd_list_element *c, const char *value)
251 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
254 /* Cache of memory operations, to speed up remote access. */
255 static DCACHE *target_dcache;
257 /* Invalidate the target dcache. */
260 target_dcache_invalidate (void)
262 dcache_invalidate (target_dcache);
265 /* The user just typed 'target' without the name of a target. */
268 target_command (char *arg, int from_tty)
270 fputs_filtered ("Argument required (target name). Try `help target'\n",
274 /* Default target_has_* methods for process_stratum targets. */
277 default_child_has_all_memory (struct target_ops *ops)
279 /* If no inferior selected, then we can't read memory here. */
280 if (ptid_equal (inferior_ptid, null_ptid))
287 default_child_has_memory (struct target_ops *ops)
289 /* If no inferior selected, then we can't read memory here. */
290 if (ptid_equal (inferior_ptid, null_ptid))
297 default_child_has_stack (struct target_ops *ops)
299 /* If no inferior selected, there's no stack. */
300 if (ptid_equal (inferior_ptid, null_ptid))
307 default_child_has_registers (struct target_ops *ops)
309 /* Can't read registers from no inferior. */
310 if (ptid_equal (inferior_ptid, null_ptid))
317 default_child_has_execution (struct target_ops *ops)
319 /* If there's no thread selected, then we can't make it run through
321 if (ptid_equal (inferior_ptid, null_ptid))
329 target_has_all_memory_1 (void)
331 struct target_ops *t;
333 for (t = current_target.beneath; t != NULL; t = t->beneath)
334 if (t->to_has_all_memory (t))
341 target_has_memory_1 (void)
343 struct target_ops *t;
345 for (t = current_target.beneath; t != NULL; t = t->beneath)
346 if (t->to_has_memory (t))
353 target_has_stack_1 (void)
355 struct target_ops *t;
357 for (t = current_target.beneath; t != NULL; t = t->beneath)
358 if (t->to_has_stack (t))
365 target_has_registers_1 (void)
367 struct target_ops *t;
369 for (t = current_target.beneath; t != NULL; t = t->beneath)
370 if (t->to_has_registers (t))
377 target_has_execution_1 (void)
379 struct target_ops *t;
381 for (t = current_target.beneath; t != NULL; t = t->beneath)
382 if (t->to_has_execution (t))
388 /* Add a possible target architecture to the list. */
391 add_target (struct target_ops *t)
393 /* Provide default values for all "must have" methods. */
394 if (t->to_xfer_partial == NULL)
395 t->to_xfer_partial = default_xfer_partial;
397 if (t->to_has_all_memory == NULL)
398 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
400 if (t->to_has_memory == NULL)
401 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
403 if (t->to_has_stack == NULL)
404 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_registers == NULL)
407 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_execution == NULL)
410 t->to_has_execution = (int (*) (struct target_ops *)) return_zero;
414 target_struct_allocsize = DEFAULT_ALLOCSIZE;
415 target_structs = (struct target_ops **) xmalloc
416 (target_struct_allocsize * sizeof (*target_structs));
418 if (target_struct_size >= target_struct_allocsize)
420 target_struct_allocsize *= 2;
421 target_structs = (struct target_ops **)
422 xrealloc ((char *) target_structs,
423 target_struct_allocsize * sizeof (*target_structs));
425 target_structs[target_struct_size++] = t;
427 if (targetlist == NULL)
428 add_prefix_cmd ("target", class_run, target_command, _("\
429 Connect to a target machine or process.\n\
430 The first argument is the type or protocol of the target machine.\n\
431 Remaining arguments are interpreted by the target protocol. For more\n\
432 information on the arguments for a particular protocol, type\n\
433 `help target ' followed by the protocol name."),
434 &targetlist, "target ", 0, &cmdlist);
435 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
448 struct target_ops *t;
450 for (t = current_target.beneath; t != NULL; t = t->beneath)
451 if (t->to_kill != NULL)
454 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
464 target_load (char *arg, int from_tty)
466 target_dcache_invalidate ();
467 (*current_target.to_load) (arg, from_tty);
471 target_create_inferior (char *exec_file, char *args,
472 char **env, int from_tty)
474 struct target_ops *t;
476 for (t = current_target.beneath; t != NULL; t = t->beneath)
478 if (t->to_create_inferior != NULL)
480 t->to_create_inferior (t, exec_file, args, env, from_tty);
482 fprintf_unfiltered (gdb_stdlog,
483 "target_create_inferior (%s, %s, xxx, %d)\n",
484 exec_file, args, from_tty);
489 internal_error (__FILE__, __LINE__,
490 _("could not find a target to create inferior"));
494 target_terminal_inferior (void)
496 /* A background resume (``run&'') should leave GDB in control of the
497 terminal. Use target_can_async_p, not target_is_async_p, since at
498 this point the target is not async yet. However, if sync_execution
499 is not set, we know it will become async prior to resume. */
500 if (target_can_async_p () && !sync_execution)
503 /* If GDB is resuming the inferior in the foreground, install
504 inferior's terminal modes. */
505 (*current_target.to_terminal_inferior) ();
509 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
510 struct target_ops *t)
512 errno = EIO; /* Can't read/write this location. */
513 return 0; /* No bytes handled. */
519 error (_("You can't do that when your target is `%s'"),
520 current_target.to_shortname);
526 error (_("You can't do that without a process to debug."));
530 nosymbol (char *name, CORE_ADDR *addrp)
532 return 1; /* Symbol does not exist in target env. */
536 default_terminal_info (char *args, int from_tty)
538 printf_unfiltered (_("No saved terminal information.\n"));
541 /* A default implementation for the to_get_ada_task_ptid target method.
543 This function builds the PTID by using both LWP and TID as part of
544 the PTID lwp and tid elements. The pid used is the pid of the
548 default_get_ada_task_ptid (long lwp, long tid)
550 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
553 /* Go through the target stack from top to bottom, copying over zero
554 entries in current_target, then filling in still empty entries. In
555 effect, we are doing class inheritance through the pushed target
558 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
559 is currently implemented, is that it discards any knowledge of
560 which target an inherited method originally belonged to.
561 Consequently, new new target methods should instead explicitly and
562 locally search the target stack for the target that can handle the
566 update_current_target (void)
568 struct target_ops *t;
570 /* First, reset current's contents. */
571 memset (¤t_target, 0, sizeof (current_target));
573 #define INHERIT(FIELD, TARGET) \
574 if (!current_target.FIELD) \
575 current_target.FIELD = (TARGET)->FIELD
577 for (t = target_stack; t; t = t->beneath)
579 INHERIT (to_shortname, t);
580 INHERIT (to_longname, t);
582 /* Do not inherit to_open. */
583 /* Do not inherit to_close. */
584 /* Do not inherit to_attach. */
585 INHERIT (to_post_attach, t);
586 INHERIT (to_attach_no_wait, t);
587 /* Do not inherit to_detach. */
588 /* Do not inherit to_disconnect. */
589 /* Do not inherit to_resume. */
590 /* Do not inherit to_wait. */
591 /* Do not inherit to_fetch_registers. */
592 /* Do not inherit to_store_registers. */
593 INHERIT (to_prepare_to_store, t);
594 INHERIT (deprecated_xfer_memory, t);
595 INHERIT (to_files_info, t);
596 INHERIT (to_insert_breakpoint, t);
597 INHERIT (to_remove_breakpoint, t);
598 INHERIT (to_can_use_hw_breakpoint, t);
599 INHERIT (to_insert_hw_breakpoint, t);
600 INHERIT (to_remove_hw_breakpoint, t);
601 INHERIT (to_insert_watchpoint, t);
602 INHERIT (to_remove_watchpoint, t);
603 INHERIT (to_stopped_data_address, t);
604 INHERIT (to_have_steppable_watchpoint, t);
605 INHERIT (to_have_continuable_watchpoint, t);
606 INHERIT (to_stopped_by_watchpoint, t);
607 INHERIT (to_watchpoint_addr_within_range, t);
608 INHERIT (to_region_ok_for_hw_watchpoint, t);
609 INHERIT (to_can_accel_watchpoint_condition, t);
610 INHERIT (to_terminal_init, t);
611 INHERIT (to_terminal_inferior, t);
612 INHERIT (to_terminal_ours_for_output, t);
613 INHERIT (to_terminal_ours, t);
614 INHERIT (to_terminal_save_ours, t);
615 INHERIT (to_terminal_info, t);
616 /* Do not inherit to_kill. */
617 INHERIT (to_load, t);
618 INHERIT (to_lookup_symbol, t);
619 /* Do no inherit to_create_inferior. */
620 INHERIT (to_post_startup_inferior, t);
621 INHERIT (to_insert_fork_catchpoint, t);
622 INHERIT (to_remove_fork_catchpoint, t);
623 INHERIT (to_insert_vfork_catchpoint, t);
624 INHERIT (to_remove_vfork_catchpoint, t);
625 /* Do not inherit to_follow_fork. */
626 INHERIT (to_insert_exec_catchpoint, t);
627 INHERIT (to_remove_exec_catchpoint, t);
628 INHERIT (to_set_syscall_catchpoint, t);
629 INHERIT (to_has_exited, t);
630 /* Do not inherit to_mourn_inferior. */
631 INHERIT (to_can_run, t);
632 INHERIT (to_notice_signals, t);
633 /* Do not inherit to_thread_alive. */
634 /* Do not inherit to_find_new_threads. */
635 /* Do not inherit to_pid_to_str. */
636 INHERIT (to_extra_thread_info, t);
637 INHERIT (to_thread_name, t);
638 INHERIT (to_stop, t);
639 /* Do not inherit to_xfer_partial. */
640 INHERIT (to_rcmd, t);
641 INHERIT (to_pid_to_exec_file, t);
642 INHERIT (to_log_command, t);
643 INHERIT (to_stratum, t);
644 /* Do not inherit to_has_all_memory. */
645 /* Do not inherit to_has_memory. */
646 /* Do not inherit to_has_stack. */
647 /* Do not inherit to_has_registers. */
648 /* Do not inherit to_has_execution. */
649 INHERIT (to_has_thread_control, t);
650 INHERIT (to_can_async_p, t);
651 INHERIT (to_is_async_p, t);
652 INHERIT (to_async, t);
653 INHERIT (to_async_mask, t);
654 INHERIT (to_find_memory_regions, t);
655 INHERIT (to_make_corefile_notes, t);
656 INHERIT (to_get_bookmark, t);
657 INHERIT (to_goto_bookmark, t);
658 /* Do not inherit to_get_thread_local_address. */
659 INHERIT (to_can_execute_reverse, t);
660 INHERIT (to_thread_architecture, t);
661 /* Do not inherit to_read_description. */
662 INHERIT (to_get_ada_task_ptid, t);
663 /* Do not inherit to_search_memory. */
664 INHERIT (to_supports_multi_process, t);
665 INHERIT (to_trace_init, t);
666 INHERIT (to_download_tracepoint, t);
667 INHERIT (to_download_trace_state_variable, t);
668 INHERIT (to_trace_set_readonly_regions, t);
669 INHERIT (to_trace_start, t);
670 INHERIT (to_get_trace_status, t);
671 INHERIT (to_trace_stop, t);
672 INHERIT (to_trace_find, t);
673 INHERIT (to_get_trace_state_variable_value, t);
674 INHERIT (to_save_trace_data, t);
675 INHERIT (to_upload_tracepoints, t);
676 INHERIT (to_upload_trace_state_variables, t);
677 INHERIT (to_get_raw_trace_data, t);
678 INHERIT (to_set_disconnected_tracing, t);
679 INHERIT (to_set_circular_trace_buffer, t);
680 INHERIT (to_get_tib_address, t);
681 INHERIT (to_set_permissions, t);
682 INHERIT (to_static_tracepoint_marker_at, t);
683 INHERIT (to_static_tracepoint_markers_by_strid, t);
684 INHERIT (to_traceframe_info, t);
685 INHERIT (to_magic, t);
686 /* Do not inherit to_memory_map. */
687 /* Do not inherit to_flash_erase. */
688 /* Do not inherit to_flash_done. */
692 /* Clean up a target struct so it no longer has any zero pointers in
693 it. Some entries are defaulted to a method that print an error,
694 others are hard-wired to a standard recursive default. */
696 #define de_fault(field, value) \
697 if (!current_target.field) \
698 current_target.field = value
701 (void (*) (char *, int))
706 de_fault (to_post_attach,
709 de_fault (to_prepare_to_store,
710 (void (*) (struct regcache *))
712 de_fault (deprecated_xfer_memory,
713 (int (*) (CORE_ADDR, gdb_byte *, int, int,
714 struct mem_attrib *, struct target_ops *))
716 de_fault (to_files_info,
717 (void (*) (struct target_ops *))
719 de_fault (to_insert_breakpoint,
720 memory_insert_breakpoint);
721 de_fault (to_remove_breakpoint,
722 memory_remove_breakpoint);
723 de_fault (to_can_use_hw_breakpoint,
724 (int (*) (int, int, int))
726 de_fault (to_insert_hw_breakpoint,
727 (int (*) (struct gdbarch *, struct bp_target_info *))
729 de_fault (to_remove_hw_breakpoint,
730 (int (*) (struct gdbarch *, struct bp_target_info *))
732 de_fault (to_insert_watchpoint,
733 (int (*) (CORE_ADDR, int, int, struct expression *))
735 de_fault (to_remove_watchpoint,
736 (int (*) (CORE_ADDR, int, int, struct expression *))
738 de_fault (to_stopped_by_watchpoint,
741 de_fault (to_stopped_data_address,
742 (int (*) (struct target_ops *, CORE_ADDR *))
744 de_fault (to_watchpoint_addr_within_range,
745 default_watchpoint_addr_within_range);
746 de_fault (to_region_ok_for_hw_watchpoint,
747 default_region_ok_for_hw_watchpoint);
748 de_fault (to_can_accel_watchpoint_condition,
749 (int (*) (CORE_ADDR, int, int, struct expression *))
751 de_fault (to_terminal_init,
754 de_fault (to_terminal_inferior,
757 de_fault (to_terminal_ours_for_output,
760 de_fault (to_terminal_ours,
763 de_fault (to_terminal_save_ours,
766 de_fault (to_terminal_info,
767 default_terminal_info);
769 (void (*) (char *, int))
771 de_fault (to_lookup_symbol,
772 (int (*) (char *, CORE_ADDR *))
774 de_fault (to_post_startup_inferior,
777 de_fault (to_insert_fork_catchpoint,
780 de_fault (to_remove_fork_catchpoint,
783 de_fault (to_insert_vfork_catchpoint,
786 de_fault (to_remove_vfork_catchpoint,
789 de_fault (to_insert_exec_catchpoint,
792 de_fault (to_remove_exec_catchpoint,
795 de_fault (to_set_syscall_catchpoint,
796 (int (*) (int, int, int, int, int *))
798 de_fault (to_has_exited,
799 (int (*) (int, int, int *))
801 de_fault (to_can_run,
803 de_fault (to_notice_signals,
806 de_fault (to_extra_thread_info,
807 (char *(*) (struct thread_info *))
809 de_fault (to_thread_name,
810 (char *(*) (struct thread_info *))
815 current_target.to_xfer_partial = current_xfer_partial;
817 (void (*) (char *, struct ui_file *))
819 de_fault (to_pid_to_exec_file,
823 (void (*) (void (*) (enum inferior_event_type, void*), void*))
825 de_fault (to_async_mask,
828 de_fault (to_thread_architecture,
829 default_thread_architecture);
830 current_target.to_read_description = NULL;
831 de_fault (to_get_ada_task_ptid,
832 (ptid_t (*) (long, long))
833 default_get_ada_task_ptid);
834 de_fault (to_supports_multi_process,
837 de_fault (to_trace_init,
840 de_fault (to_download_tracepoint,
841 (void (*) (struct breakpoint *))
843 de_fault (to_download_trace_state_variable,
844 (void (*) (struct trace_state_variable *))
846 de_fault (to_trace_set_readonly_regions,
849 de_fault (to_trace_start,
852 de_fault (to_get_trace_status,
853 (int (*) (struct trace_status *))
855 de_fault (to_trace_stop,
858 de_fault (to_trace_find,
859 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
861 de_fault (to_get_trace_state_variable_value,
862 (int (*) (int, LONGEST *))
864 de_fault (to_save_trace_data,
865 (int (*) (const char *))
867 de_fault (to_upload_tracepoints,
868 (int (*) (struct uploaded_tp **))
870 de_fault (to_upload_trace_state_variables,
871 (int (*) (struct uploaded_tsv **))
873 de_fault (to_get_raw_trace_data,
874 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
876 de_fault (to_set_disconnected_tracing,
879 de_fault (to_set_circular_trace_buffer,
882 de_fault (to_get_tib_address,
883 (int (*) (ptid_t, CORE_ADDR *))
885 de_fault (to_set_permissions,
888 de_fault (to_static_tracepoint_marker_at,
889 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
891 de_fault (to_static_tracepoint_markers_by_strid,
892 (VEC(static_tracepoint_marker_p) * (*) (const char *))
894 de_fault (to_traceframe_info,
895 (struct traceframe_info * (*) (void))
899 /* Finally, position the target-stack beneath the squashed
900 "current_target". That way code looking for a non-inherited
901 target method can quickly and simply find it. */
902 current_target.beneath = target_stack;
905 setup_target_debug ();
908 /* Push a new target type into the stack of the existing target accessors,
909 possibly superseding some of the existing accessors.
911 Rather than allow an empty stack, we always have the dummy target at
912 the bottom stratum, so we can call the function vectors without
916 push_target (struct target_ops *t)
918 struct target_ops **cur;
920 /* Check magic number. If wrong, it probably means someone changed
921 the struct definition, but not all the places that initialize one. */
922 if (t->to_magic != OPS_MAGIC)
924 fprintf_unfiltered (gdb_stderr,
925 "Magic number of %s target struct wrong\n",
927 internal_error (__FILE__, __LINE__,
928 _("failed internal consistency check"));
931 /* Find the proper stratum to install this target in. */
932 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
934 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
938 /* If there's already targets at this stratum, remove them. */
939 /* FIXME: cagney/2003-10-15: I think this should be popping all
940 targets to CUR, and not just those at this stratum level. */
941 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
943 /* There's already something at this stratum level. Close it,
944 and un-hook it from the stack. */
945 struct target_ops *tmp = (*cur);
947 (*cur) = (*cur)->beneath;
949 target_close (tmp, 0);
952 /* We have removed all targets in our stratum, now add the new one. */
956 update_current_target ();
959 /* Remove a target_ops vector from the stack, wherever it may be.
960 Return how many times it was removed (0 or 1). */
963 unpush_target (struct target_ops *t)
965 struct target_ops **cur;
966 struct target_ops *tmp;
968 if (t->to_stratum == dummy_stratum)
969 internal_error (__FILE__, __LINE__,
970 _("Attempt to unpush the dummy target"));
972 /* Look for the specified target. Note that we assume that a target
973 can only occur once in the target stack. */
975 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
982 return 0; /* Didn't find target_ops, quit now. */
984 /* NOTE: cagney/2003-12-06: In '94 the close call was made
985 unconditional by moving it to before the above check that the
986 target was in the target stack (something about "Change the way
987 pushing and popping of targets work to support target overlays
988 and inheritance"). This doesn't make much sense - only open
989 targets should be closed. */
992 /* Unchain the target. */
994 (*cur) = (*cur)->beneath;
997 update_current_target ();
1005 target_close (target_stack, 0); /* Let it clean up. */
1006 if (unpush_target (target_stack) == 1)
1009 fprintf_unfiltered (gdb_stderr,
1010 "pop_target couldn't find target %s\n",
1011 current_target.to_shortname);
1012 internal_error (__FILE__, __LINE__,
1013 _("failed internal consistency check"));
1017 pop_all_targets_above (enum strata above_stratum, int quitting)
1019 while ((int) (current_target.to_stratum) > (int) above_stratum)
1021 target_close (target_stack, quitting);
1022 if (!unpush_target (target_stack))
1024 fprintf_unfiltered (gdb_stderr,
1025 "pop_all_targets couldn't find target %s\n",
1026 target_stack->to_shortname);
1027 internal_error (__FILE__, __LINE__,
1028 _("failed internal consistency check"));
1035 pop_all_targets (int quitting)
1037 pop_all_targets_above (dummy_stratum, quitting);
1040 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1043 target_is_pushed (struct target_ops *t)
1045 struct target_ops **cur;
1047 /* Check magic number. If wrong, it probably means someone changed
1048 the struct definition, but not all the places that initialize one. */
1049 if (t->to_magic != OPS_MAGIC)
1051 fprintf_unfiltered (gdb_stderr,
1052 "Magic number of %s target struct wrong\n",
1054 internal_error (__FILE__, __LINE__,
1055 _("failed internal consistency check"));
1058 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1065 /* Using the objfile specified in OBJFILE, find the address for the
1066 current thread's thread-local storage with offset OFFSET. */
1068 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1070 volatile CORE_ADDR addr = 0;
1071 struct target_ops *target;
1073 for (target = current_target.beneath;
1075 target = target->beneath)
1077 if (target->to_get_thread_local_address != NULL)
1082 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1084 ptid_t ptid = inferior_ptid;
1085 volatile struct gdb_exception ex;
1087 TRY_CATCH (ex, RETURN_MASK_ALL)
1091 /* Fetch the load module address for this objfile. */
1092 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1094 /* If it's 0, throw the appropriate exception. */
1096 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1097 _("TLS load module not found"));
1099 addr = target->to_get_thread_local_address (target, ptid,
1102 /* If an error occurred, print TLS related messages here. Otherwise,
1103 throw the error to some higher catcher. */
1106 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1110 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1111 error (_("Cannot find thread-local variables "
1112 "in this thread library."));
1114 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1115 if (objfile_is_library)
1116 error (_("Cannot find shared library `%s' in dynamic"
1117 " linker's load module list"), objfile->name);
1119 error (_("Cannot find executable file `%s' in dynamic"
1120 " linker's load module list"), objfile->name);
1122 case TLS_NOT_ALLOCATED_YET_ERROR:
1123 if (objfile_is_library)
1124 error (_("The inferior has not yet allocated storage for"
1125 " thread-local variables in\n"
1126 "the shared library `%s'\n"
1128 objfile->name, target_pid_to_str (ptid));
1130 error (_("The inferior has not yet allocated storage for"
1131 " thread-local variables in\n"
1132 "the executable `%s'\n"
1134 objfile->name, target_pid_to_str (ptid));
1136 case TLS_GENERIC_ERROR:
1137 if (objfile_is_library)
1138 error (_("Cannot find thread-local storage for %s, "
1139 "shared library %s:\n%s"),
1140 target_pid_to_str (ptid),
1141 objfile->name, ex.message);
1143 error (_("Cannot find thread-local storage for %s, "
1144 "executable file %s:\n%s"),
1145 target_pid_to_str (ptid),
1146 objfile->name, ex.message);
1149 throw_exception (ex);
1154 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1155 TLS is an ABI-specific thing. But we don't do that yet. */
1157 error (_("Cannot find thread-local variables on this target"));
1163 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1165 /* target_read_string -- read a null terminated string, up to LEN bytes,
1166 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1167 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1168 is responsible for freeing it. Return the number of bytes successfully
1172 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1174 int tlen, origlen, offset, i;
1178 int buffer_allocated;
1180 unsigned int nbytes_read = 0;
1182 gdb_assert (string);
1184 /* Small for testing. */
1185 buffer_allocated = 4;
1186 buffer = xmalloc (buffer_allocated);
1193 tlen = MIN (len, 4 - (memaddr & 3));
1194 offset = memaddr & 3;
1196 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1199 /* The transfer request might have crossed the boundary to an
1200 unallocated region of memory. Retry the transfer, requesting
1204 errcode = target_read_memory (memaddr, buf, 1);
1209 if (bufptr - buffer + tlen > buffer_allocated)
1213 bytes = bufptr - buffer;
1214 buffer_allocated *= 2;
1215 buffer = xrealloc (buffer, buffer_allocated);
1216 bufptr = buffer + bytes;
1219 for (i = 0; i < tlen; i++)
1221 *bufptr++ = buf[i + offset];
1222 if (buf[i + offset] == '\000')
1224 nbytes_read += i + 1;
1231 nbytes_read += tlen;
1240 struct target_section_table *
1241 target_get_section_table (struct target_ops *target)
1243 struct target_ops *t;
1246 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1248 for (t = target; t != NULL; t = t->beneath)
1249 if (t->to_get_section_table != NULL)
1250 return (*t->to_get_section_table) (t);
1255 /* Find a section containing ADDR. */
1257 struct target_section *
1258 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1260 struct target_section_table *table = target_get_section_table (target);
1261 struct target_section *secp;
1266 for (secp = table->sections; secp < table->sections_end; secp++)
1268 if (addr >= secp->addr && addr < secp->endaddr)
1274 /* Read memory from the live target, even if currently inspecting a
1275 traceframe. The return is the same as that of target_read. */
1278 target_read_live_memory (enum target_object object,
1279 ULONGEST memaddr, gdb_byte *myaddr, LONGEST len)
1282 struct cleanup *cleanup;
1284 /* Switch momentarily out of tfind mode so to access live memory.
1285 Note that this must not clear global state, such as the frame
1286 cache, which must still remain valid for the previous traceframe.
1287 We may be _building_ the frame cache at this point. */
1288 cleanup = make_cleanup_restore_traceframe_number ();
1289 set_traceframe_number (-1);
1291 ret = target_read (current_target.beneath, object, NULL,
1292 myaddr, memaddr, len);
1294 do_cleanups (cleanup);
1298 /* Using the set of read-only target sections of OPS, read live
1299 read-only memory. Note that the actual reads start from the
1300 top-most target again. */
1303 memory_xfer_live_readonly_partial (struct target_ops *ops,
1304 enum target_object object,
1305 gdb_byte *readbuf, ULONGEST memaddr,
1308 struct target_section *secp;
1309 struct target_section_table *table;
1311 secp = target_section_by_addr (ops, memaddr);
1313 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1316 struct target_section *p;
1317 ULONGEST memend = memaddr + len;
1319 table = target_get_section_table (ops);
1321 for (p = table->sections; p < table->sections_end; p++)
1323 if (memaddr >= p->addr)
1325 if (memend <= p->endaddr)
1327 /* Entire transfer is within this section. */
1328 return target_read_live_memory (object, memaddr,
1331 else if (memaddr >= p->endaddr)
1333 /* This section ends before the transfer starts. */
1338 /* This section overlaps the transfer. Just do half. */
1339 len = p->endaddr - memaddr;
1340 return target_read_live_memory (object, memaddr,
1350 /* Perform a partial memory transfer.
1351 For docs see target.h, to_xfer_partial. */
1354 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1355 void *readbuf, const void *writebuf, ULONGEST memaddr,
1360 struct mem_region *region;
1361 struct inferior *inf;
1363 /* Zero length requests are ok and require no work. */
1367 /* For accesses to unmapped overlay sections, read directly from
1368 files. Must do this first, as MEMADDR may need adjustment. */
1369 if (readbuf != NULL && overlay_debugging)
1371 struct obj_section *section = find_pc_overlay (memaddr);
1373 if (pc_in_unmapped_range (memaddr, section))
1375 struct target_section_table *table
1376 = target_get_section_table (ops);
1377 const char *section_name = section->the_bfd_section->name;
1379 memaddr = overlay_mapped_address (memaddr, section);
1380 return section_table_xfer_memory_partial (readbuf, writebuf,
1383 table->sections_end,
1388 /* Try the executable files, if "trust-readonly-sections" is set. */
1389 if (readbuf != NULL && trust_readonly)
1391 struct target_section *secp;
1392 struct target_section_table *table;
1394 secp = target_section_by_addr (ops, memaddr);
1396 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1399 table = target_get_section_table (ops);
1400 return section_table_xfer_memory_partial (readbuf, writebuf,
1403 table->sections_end,
1408 /* If reading unavailable memory in the context of traceframes, and
1409 this address falls within a read-only section, fallback to
1410 reading from live memory. */
1411 if (readbuf != NULL && get_traceframe_number () != -1)
1413 VEC(mem_range_s) *available;
1415 /* If we fail to get the set of available memory, then the
1416 target does not support querying traceframe info, and so we
1417 attempt reading from the traceframe anyway (assuming the
1418 target implements the old QTro packet then). */
1419 if (traceframe_available_memory (&available, memaddr, len))
1421 struct cleanup *old_chain;
1423 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1425 if (VEC_empty (mem_range_s, available)
1426 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1428 /* Don't read into the traceframe's available
1430 if (!VEC_empty (mem_range_s, available))
1432 LONGEST oldlen = len;
1434 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1435 gdb_assert (len <= oldlen);
1438 do_cleanups (old_chain);
1440 /* This goes through the topmost target again. */
1441 res = memory_xfer_live_readonly_partial (ops, object,
1442 readbuf, memaddr, len);
1446 /* No use trying further, we know some memory starting
1447 at MEMADDR isn't available. */
1451 /* Don't try to read more than how much is available, in
1452 case the target implements the deprecated QTro packet to
1453 cater for older GDBs (the target's knowledge of read-only
1454 sections may be outdated by now). */
1455 len = VEC_index (mem_range_s, available, 0)->length;
1457 do_cleanups (old_chain);
1461 /* Try GDB's internal data cache. */
1462 region = lookup_mem_region (memaddr);
1463 /* region->hi == 0 means there's no upper bound. */
1464 if (memaddr + len < region->hi || region->hi == 0)
1467 reg_len = region->hi - memaddr;
1469 switch (region->attrib.mode)
1472 if (writebuf != NULL)
1477 if (readbuf != NULL)
1482 /* We only support writing to flash during "load" for now. */
1483 if (writebuf != NULL)
1484 error (_("Writing to flash memory forbidden in this context"));
1491 if (!ptid_equal (inferior_ptid, null_ptid))
1492 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1497 /* The dcache reads whole cache lines; that doesn't play well
1498 with reading from a trace buffer, because reading outside of
1499 the collected memory range fails. */
1500 && get_traceframe_number () == -1
1501 && (region->attrib.cache
1502 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1504 if (readbuf != NULL)
1505 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1508 /* FIXME drow/2006-08-09: If we're going to preserve const
1509 correctness dcache_xfer_memory should take readbuf and
1511 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1518 if (readbuf && !show_memory_breakpoints)
1519 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1524 /* If none of those methods found the memory we wanted, fall back
1525 to a target partial transfer. Normally a single call to
1526 to_xfer_partial is enough; if it doesn't recognize an object
1527 it will call the to_xfer_partial of the next target down.
1528 But for memory this won't do. Memory is the only target
1529 object which can be read from more than one valid target.
1530 A core file, for instance, could have some of memory but
1531 delegate other bits to the target below it. So, we must
1532 manually try all targets. */
1536 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1537 readbuf, writebuf, memaddr, reg_len);
1541 /* We want to continue past core files to executables, but not
1542 past a running target's memory. */
1543 if (ops->to_has_all_memory (ops))
1548 while (ops != NULL);
1550 if (res > 0 && readbuf != NULL && !show_memory_breakpoints)
1551 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1553 /* Make sure the cache gets updated no matter what - if we are writing
1554 to the stack. Even if this write is not tagged as such, we still need
1555 to update the cache. */
1560 && !region->attrib.cache
1561 && stack_cache_enabled_p
1562 && object != TARGET_OBJECT_STACK_MEMORY)
1564 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1567 /* If we still haven't got anything, return the last error. We
1573 restore_show_memory_breakpoints (void *arg)
1575 show_memory_breakpoints = (uintptr_t) arg;
1579 make_show_memory_breakpoints_cleanup (int show)
1581 int current = show_memory_breakpoints;
1583 show_memory_breakpoints = show;
1584 return make_cleanup (restore_show_memory_breakpoints,
1585 (void *) (uintptr_t) current);
1588 /* For docs see target.h, to_xfer_partial. */
1591 target_xfer_partial (struct target_ops *ops,
1592 enum target_object object, const char *annex,
1593 void *readbuf, const void *writebuf,
1594 ULONGEST offset, LONGEST len)
1598 gdb_assert (ops->to_xfer_partial != NULL);
1600 if (writebuf && !may_write_memory)
1601 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1602 core_addr_to_string_nz (offset), plongest (len));
1604 /* If this is a memory transfer, let the memory-specific code
1605 have a look at it instead. Memory transfers are more
1607 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1608 retval = memory_xfer_partial (ops, object, readbuf,
1609 writebuf, offset, len);
1612 enum target_object raw_object = object;
1614 /* If this is a raw memory transfer, request the normal
1615 memory object from other layers. */
1616 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1617 raw_object = TARGET_OBJECT_MEMORY;
1619 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1620 writebuf, offset, len);
1625 const unsigned char *myaddr = NULL;
1627 fprintf_unfiltered (gdb_stdlog,
1628 "%s:target_xfer_partial "
1629 "(%d, %s, %s, %s, %s, %s) = %s",
1632 (annex ? annex : "(null)"),
1633 host_address_to_string (readbuf),
1634 host_address_to_string (writebuf),
1635 core_addr_to_string_nz (offset),
1636 plongest (len), plongest (retval));
1642 if (retval > 0 && myaddr != NULL)
1646 fputs_unfiltered (", bytes =", gdb_stdlog);
1647 for (i = 0; i < retval; i++)
1649 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1651 if (targetdebug < 2 && i > 0)
1653 fprintf_unfiltered (gdb_stdlog, " ...");
1656 fprintf_unfiltered (gdb_stdlog, "\n");
1659 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1663 fputc_unfiltered ('\n', gdb_stdlog);
1668 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1669 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1670 if any error occurs.
1672 If an error occurs, no guarantee is made about the contents of the data at
1673 MYADDR. In particular, the caller should not depend upon partial reads
1674 filling the buffer with good data. There is no way for the caller to know
1675 how much good data might have been transfered anyway. Callers that can
1676 deal with partial reads should call target_read (which will retry until
1677 it makes no progress, and then return how much was transferred). */
1680 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1682 /* Dispatch to the topmost target, not the flattened current_target.
1683 Memory accesses check target->to_has_(all_)memory, and the
1684 flattened target doesn't inherit those. */
1685 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1686 myaddr, memaddr, len) == len)
1692 /* Like target_read_memory, but specify explicitly that this is a read from
1693 the target's stack. This may trigger different cache behavior. */
1696 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1698 /* Dispatch to the topmost target, not the flattened current_target.
1699 Memory accesses check target->to_has_(all_)memory, and the
1700 flattened target doesn't inherit those. */
1702 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1703 myaddr, memaddr, len) == len)
1709 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1710 Returns either 0 for success or an errno value if any error occurs.
1711 If an error occurs, no guarantee is made about how much data got written.
1712 Callers that can deal with partial writes should call target_write. */
1715 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1717 /* Dispatch to the topmost target, not the flattened current_target.
1718 Memory accesses check target->to_has_(all_)memory, and the
1719 flattened target doesn't inherit those. */
1720 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1721 myaddr, memaddr, len) == len)
1727 /* Fetch the target's memory map. */
1730 target_memory_map (void)
1732 VEC(mem_region_s) *result;
1733 struct mem_region *last_one, *this_one;
1735 struct target_ops *t;
1738 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1740 for (t = current_target.beneath; t != NULL; t = t->beneath)
1741 if (t->to_memory_map != NULL)
1747 result = t->to_memory_map (t);
1751 qsort (VEC_address (mem_region_s, result),
1752 VEC_length (mem_region_s, result),
1753 sizeof (struct mem_region), mem_region_cmp);
1755 /* Check that regions do not overlap. Simultaneously assign
1756 a numbering for the "mem" commands to use to refer to
1759 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1761 this_one->number = ix;
1763 if (last_one && last_one->hi > this_one->lo)
1765 warning (_("Overlapping regions in memory map: ignoring"));
1766 VEC_free (mem_region_s, result);
1769 last_one = this_one;
1776 target_flash_erase (ULONGEST address, LONGEST length)
1778 struct target_ops *t;
1780 for (t = current_target.beneath; t != NULL; t = t->beneath)
1781 if (t->to_flash_erase != NULL)
1784 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1785 hex_string (address), phex (length, 0));
1786 t->to_flash_erase (t, address, length);
1794 target_flash_done (void)
1796 struct target_ops *t;
1798 for (t = current_target.beneath; t != NULL; t = t->beneath)
1799 if (t->to_flash_done != NULL)
1802 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1803 t->to_flash_done (t);
1811 show_trust_readonly (struct ui_file *file, int from_tty,
1812 struct cmd_list_element *c, const char *value)
1814 fprintf_filtered (file,
1815 _("Mode for reading from readonly sections is %s.\n"),
1819 /* More generic transfers. */
1822 default_xfer_partial (struct target_ops *ops, enum target_object object,
1823 const char *annex, gdb_byte *readbuf,
1824 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1826 if (object == TARGET_OBJECT_MEMORY
1827 && ops->deprecated_xfer_memory != NULL)
1828 /* If available, fall back to the target's
1829 "deprecated_xfer_memory" method. */
1834 if (writebuf != NULL)
1836 void *buffer = xmalloc (len);
1837 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1839 memcpy (buffer, writebuf, len);
1840 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1841 1/*write*/, NULL, ops);
1842 do_cleanups (cleanup);
1844 if (readbuf != NULL)
1845 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1846 0/*read*/, NULL, ops);
1849 else if (xfered == 0 && errno == 0)
1850 /* "deprecated_xfer_memory" uses 0, cross checked against
1851 ERRNO as one indication of an error. */
1856 else if (ops->beneath != NULL)
1857 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1858 readbuf, writebuf, offset, len);
1863 /* The xfer_partial handler for the topmost target. Unlike the default,
1864 it does not need to handle memory specially; it just passes all
1865 requests down the stack. */
1868 current_xfer_partial (struct target_ops *ops, enum target_object object,
1869 const char *annex, gdb_byte *readbuf,
1870 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1872 if (ops->beneath != NULL)
1873 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1874 readbuf, writebuf, offset, len);
1879 /* Target vector read/write partial wrapper functions. */
1882 target_read_partial (struct target_ops *ops,
1883 enum target_object object,
1884 const char *annex, gdb_byte *buf,
1885 ULONGEST offset, LONGEST len)
1887 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1891 target_write_partial (struct target_ops *ops,
1892 enum target_object object,
1893 const char *annex, const gdb_byte *buf,
1894 ULONGEST offset, LONGEST len)
1896 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1899 /* Wrappers to perform the full transfer. */
1901 /* For docs on target_read see target.h. */
1904 target_read (struct target_ops *ops,
1905 enum target_object object,
1906 const char *annex, gdb_byte *buf,
1907 ULONGEST offset, LONGEST len)
1911 while (xfered < len)
1913 LONGEST xfer = target_read_partial (ops, object, annex,
1914 (gdb_byte *) buf + xfered,
1915 offset + xfered, len - xfered);
1917 /* Call an observer, notifying them of the xfer progress? */
1928 /** Assuming that the entire [begin, end) range of memory cannot be read,
1929 try to read whatever subrange is possible to read.
1931 The function results, in RESULT, either zero or one memory block.
1932 If there's a readable subrange at the beginning, it is completely
1933 read and returned. Any further readable subrange will not be read.
1934 Otherwise, if there's a readable subrange at the end, it will be
1935 completely read and returned. Any readable subranges before it (obviously,
1936 not starting at the beginning), will be ignored. In other cases --
1937 either no readable subrange, or readable subrange (s) that is neither
1938 at the beginning, or end, nothing is returned.
1940 The purpose of this function is to handle a read across a boundary of
1941 accessible memory in a case when memory map is not available. The above
1942 restrictions are fine for this case, but will give incorrect results if
1943 the memory is 'patchy'. However, supporting 'patchy' memory would require
1944 trying to read every single byte, and it seems unacceptable solution.
1945 Explicit memory map is recommended for this case -- and
1946 target_read_memory_robust will take care of reading multiple ranges
1950 read_whatever_is_readable (struct target_ops *ops,
1951 ULONGEST begin, ULONGEST end,
1952 VEC(memory_read_result_s) **result)
1954 gdb_byte *buf = xmalloc (end-begin);
1955 ULONGEST current_begin = begin;
1956 ULONGEST current_end = end;
1958 memory_read_result_s r;
1960 /* If we previously failed to read 1 byte, nothing can be done here. */
1961 if (end - begin <= 1)
1964 /* Check that either first or the last byte is readable, and give up
1965 if not. This heuristic is meant to permit reading accessible memory
1966 at the boundary of accessible region. */
1967 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1968 buf, begin, 1) == 1)
1973 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1974 buf + (end-begin) - 1, end - 1, 1) == 1)
1984 /* Loop invariant is that the [current_begin, current_end) was previously
1985 found to be not readable as a whole.
1987 Note loop condition -- if the range has 1 byte, we can't divide the range
1988 so there's no point trying further. */
1989 while (current_end - current_begin > 1)
1991 ULONGEST first_half_begin, first_half_end;
1992 ULONGEST second_half_begin, second_half_end;
1995 ULONGEST middle = current_begin + (current_end - current_begin)/2;
1998 first_half_begin = current_begin;
1999 first_half_end = middle;
2000 second_half_begin = middle;
2001 second_half_end = current_end;
2005 first_half_begin = middle;
2006 first_half_end = current_end;
2007 second_half_begin = current_begin;
2008 second_half_end = middle;
2011 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2012 buf + (first_half_begin - begin),
2014 first_half_end - first_half_begin);
2016 if (xfer == first_half_end - first_half_begin)
2018 /* This half reads up fine. So, the error must be in the
2020 current_begin = second_half_begin;
2021 current_end = second_half_end;
2025 /* This half is not readable. Because we've tried one byte, we
2026 know some part of this half if actually redable. Go to the next
2027 iteration to divide again and try to read.
2029 We don't handle the other half, because this function only tries
2030 to read a single readable subrange. */
2031 current_begin = first_half_begin;
2032 current_end = first_half_end;
2038 /* The [begin, current_begin) range has been read. */
2040 r.end = current_begin;
2045 /* The [current_end, end) range has been read. */
2046 LONGEST rlen = end - current_end;
2047 r.data = xmalloc (rlen);
2048 memcpy (r.data, buf + current_end - begin, rlen);
2049 r.begin = current_end;
2053 VEC_safe_push(memory_read_result_s, (*result), &r);
2057 free_memory_read_result_vector (void *x)
2059 VEC(memory_read_result_s) *v = x;
2060 memory_read_result_s *current;
2063 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2065 xfree (current->data);
2067 VEC_free (memory_read_result_s, v);
2070 VEC(memory_read_result_s) *
2071 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2073 VEC(memory_read_result_s) *result = 0;
2076 while (xfered < len)
2078 struct mem_region *region = lookup_mem_region (offset + xfered);
2081 /* If there is no explicit region, a fake one should be created. */
2082 gdb_assert (region);
2084 if (region->hi == 0)
2085 rlen = len - xfered;
2087 rlen = region->hi - offset;
2089 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2091 /* Cannot read this region. Note that we can end up here only
2092 if the region is explicitly marked inaccessible, or
2093 'inaccessible-by-default' is in effect. */
2098 LONGEST to_read = min (len - xfered, rlen);
2099 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2101 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2102 (gdb_byte *) buffer,
2103 offset + xfered, to_read);
2104 /* Call an observer, notifying them of the xfer progress? */
2107 /* Got an error reading full chunk. See if maybe we can read
2110 read_whatever_is_readable (ops, offset + xfered,
2111 offset + xfered + to_read, &result);
2116 struct memory_read_result r;
2118 r.begin = offset + xfered;
2119 r.end = r.begin + xfer;
2120 VEC_safe_push (memory_read_result_s, result, &r);
2130 /* An alternative to target_write with progress callbacks. */
2133 target_write_with_progress (struct target_ops *ops,
2134 enum target_object object,
2135 const char *annex, const gdb_byte *buf,
2136 ULONGEST offset, LONGEST len,
2137 void (*progress) (ULONGEST, void *), void *baton)
2141 /* Give the progress callback a chance to set up. */
2143 (*progress) (0, baton);
2145 while (xfered < len)
2147 LONGEST xfer = target_write_partial (ops, object, annex,
2148 (gdb_byte *) buf + xfered,
2149 offset + xfered, len - xfered);
2157 (*progress) (xfer, baton);
2165 /* For docs on target_write see target.h. */
2168 target_write (struct target_ops *ops,
2169 enum target_object object,
2170 const char *annex, const gdb_byte *buf,
2171 ULONGEST offset, LONGEST len)
2173 return target_write_with_progress (ops, object, annex, buf, offset, len,
2177 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2178 the size of the transferred data. PADDING additional bytes are
2179 available in *BUF_P. This is a helper function for
2180 target_read_alloc; see the declaration of that function for more
2184 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2185 const char *annex, gdb_byte **buf_p, int padding)
2187 size_t buf_alloc, buf_pos;
2191 /* This function does not have a length parameter; it reads the
2192 entire OBJECT). Also, it doesn't support objects fetched partly
2193 from one target and partly from another (in a different stratum,
2194 e.g. a core file and an executable). Both reasons make it
2195 unsuitable for reading memory. */
2196 gdb_assert (object != TARGET_OBJECT_MEMORY);
2198 /* Start by reading up to 4K at a time. The target will throttle
2199 this number down if necessary. */
2201 buf = xmalloc (buf_alloc);
2205 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2206 buf_pos, buf_alloc - buf_pos - padding);
2209 /* An error occurred. */
2215 /* Read all there was. */
2225 /* If the buffer is filling up, expand it. */
2226 if (buf_alloc < buf_pos * 2)
2229 buf = xrealloc (buf, buf_alloc);
2236 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2237 the size of the transferred data. See the declaration in "target.h"
2238 function for more information about the return value. */
2241 target_read_alloc (struct target_ops *ops, enum target_object object,
2242 const char *annex, gdb_byte **buf_p)
2244 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2247 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2248 returned as a string, allocated using xmalloc. If an error occurs
2249 or the transfer is unsupported, NULL is returned. Empty objects
2250 are returned as allocated but empty strings. A warning is issued
2251 if the result contains any embedded NUL bytes. */
2254 target_read_stralloc (struct target_ops *ops, enum target_object object,
2258 LONGEST transferred;
2260 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2262 if (transferred < 0)
2265 if (transferred == 0)
2266 return xstrdup ("");
2268 buffer[transferred] = 0;
2269 if (strlen (buffer) < transferred)
2270 warning (_("target object %d, annex %s, "
2271 "contained unexpected null characters"),
2272 (int) object, annex ? annex : "(none)");
2274 return (char *) buffer;
2277 /* Memory transfer methods. */
2280 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2283 /* This method is used to read from an alternate, non-current
2284 target. This read must bypass the overlay support (as symbols
2285 don't match this target), and GDB's internal cache (wrong cache
2286 for this target). */
2287 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2289 memory_error (EIO, addr);
2293 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2294 int len, enum bfd_endian byte_order)
2296 gdb_byte buf[sizeof (ULONGEST)];
2298 gdb_assert (len <= sizeof (buf));
2299 get_target_memory (ops, addr, buf, len);
2300 return extract_unsigned_integer (buf, len, byte_order);
2304 target_insert_breakpoint (struct gdbarch *gdbarch,
2305 struct bp_target_info *bp_tgt)
2307 if (!may_insert_breakpoints)
2309 warning (_("May not insert breakpoints"));
2313 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2317 target_remove_breakpoint (struct gdbarch *gdbarch,
2318 struct bp_target_info *bp_tgt)
2320 /* This is kind of a weird case to handle, but the permission might
2321 have been changed after breakpoints were inserted - in which case
2322 we should just take the user literally and assume that any
2323 breakpoints should be left in place. */
2324 if (!may_insert_breakpoints)
2326 warning (_("May not remove breakpoints"));
2330 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2334 target_info (char *args, int from_tty)
2336 struct target_ops *t;
2337 int has_all_mem = 0;
2339 if (symfile_objfile != NULL)
2340 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2342 for (t = target_stack; t != NULL; t = t->beneath)
2344 if (!(*t->to_has_memory) (t))
2347 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2350 printf_unfiltered (_("\tWhile running this, "
2351 "GDB does not access memory from...\n"));
2352 printf_unfiltered ("%s:\n", t->to_longname);
2353 (t->to_files_info) (t);
2354 has_all_mem = (*t->to_has_all_memory) (t);
2358 /* This function is called before any new inferior is created, e.g.
2359 by running a program, attaching, or connecting to a target.
2360 It cleans up any state from previous invocations which might
2361 change between runs. This is a subset of what target_preopen
2362 resets (things which might change between targets). */
2365 target_pre_inferior (int from_tty)
2367 /* Clear out solib state. Otherwise the solib state of the previous
2368 inferior might have survived and is entirely wrong for the new
2369 target. This has been observed on GNU/Linux using glibc 2.3. How
2381 Cannot access memory at address 0xdeadbeef
2384 /* In some OSs, the shared library list is the same/global/shared
2385 across inferiors. If code is shared between processes, so are
2386 memory regions and features. */
2387 if (!gdbarch_has_global_solist (target_gdbarch))
2389 no_shared_libraries (NULL, from_tty);
2391 invalidate_target_mem_regions ();
2393 target_clear_description ();
2397 /* Callback for iterate_over_inferiors. Gets rid of the given
2401 dispose_inferior (struct inferior *inf, void *args)
2403 struct thread_info *thread;
2405 thread = any_thread_of_process (inf->pid);
2408 switch_to_thread (thread->ptid);
2410 /* Core inferiors actually should be detached, not killed. */
2411 if (target_has_execution)
2414 target_detach (NULL, 0);
2420 /* This is to be called by the open routine before it does
2424 target_preopen (int from_tty)
2428 if (have_inferiors ())
2431 || !have_live_inferiors ()
2432 || query (_("A program is being debugged already. Kill it? ")))
2433 iterate_over_inferiors (dispose_inferior, NULL);
2435 error (_("Program not killed."));
2438 /* Calling target_kill may remove the target from the stack. But if
2439 it doesn't (which seems like a win for UDI), remove it now. */
2440 /* Leave the exec target, though. The user may be switching from a
2441 live process to a core of the same program. */
2442 pop_all_targets_above (file_stratum, 0);
2444 target_pre_inferior (from_tty);
2447 /* Detach a target after doing deferred register stores. */
2450 target_detach (char *args, int from_tty)
2452 struct target_ops* t;
2454 if (gdbarch_has_global_breakpoints (target_gdbarch))
2455 /* Don't remove global breakpoints here. They're removed on
2456 disconnection from the target. */
2459 /* If we're in breakpoints-always-inserted mode, have to remove
2460 them before detaching. */
2461 remove_breakpoints_pid (PIDGET (inferior_ptid));
2463 prepare_for_detach ();
2465 for (t = current_target.beneath; t != NULL; t = t->beneath)
2467 if (t->to_detach != NULL)
2469 t->to_detach (t, args, from_tty);
2471 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2477 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2481 target_disconnect (char *args, int from_tty)
2483 struct target_ops *t;
2485 /* If we're in breakpoints-always-inserted mode or if breakpoints
2486 are global across processes, we have to remove them before
2488 remove_breakpoints ();
2490 for (t = current_target.beneath; t != NULL; t = t->beneath)
2491 if (t->to_disconnect != NULL)
2494 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2496 t->to_disconnect (t, args, from_tty);
2504 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2506 struct target_ops *t;
2508 for (t = current_target.beneath; t != NULL; t = t->beneath)
2510 if (t->to_wait != NULL)
2512 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2516 char *status_string;
2518 status_string = target_waitstatus_to_string (status);
2519 fprintf_unfiltered (gdb_stdlog,
2520 "target_wait (%d, status) = %d, %s\n",
2521 PIDGET (ptid), PIDGET (retval),
2523 xfree (status_string);
2534 target_pid_to_str (ptid_t ptid)
2536 struct target_ops *t;
2538 for (t = current_target.beneath; t != NULL; t = t->beneath)
2540 if (t->to_pid_to_str != NULL)
2541 return (*t->to_pid_to_str) (t, ptid);
2544 return normal_pid_to_str (ptid);
2548 target_thread_name (struct thread_info *info)
2550 struct target_ops *t;
2552 for (t = current_target.beneath; t != NULL; t = t->beneath)
2554 if (t->to_thread_name != NULL)
2555 return (*t->to_thread_name) (info);
2562 target_resume (ptid_t ptid, int step, enum target_signal signal)
2564 struct target_ops *t;
2566 target_dcache_invalidate ();
2568 for (t = current_target.beneath; t != NULL; t = t->beneath)
2570 if (t->to_resume != NULL)
2572 t->to_resume (t, ptid, step, signal);
2574 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2576 step ? "step" : "continue",
2577 target_signal_to_name (signal));
2579 registers_changed_ptid (ptid);
2580 set_executing (ptid, 1);
2581 set_running (ptid, 1);
2582 clear_inline_frame_state (ptid);
2589 /* Look through the list of possible targets for a target that can
2593 target_follow_fork (int follow_child)
2595 struct target_ops *t;
2597 for (t = current_target.beneath; t != NULL; t = t->beneath)
2599 if (t->to_follow_fork != NULL)
2601 int retval = t->to_follow_fork (t, follow_child);
2604 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2605 follow_child, retval);
2610 /* Some target returned a fork event, but did not know how to follow it. */
2611 internal_error (__FILE__, __LINE__,
2612 _("could not find a target to follow fork"));
2616 target_mourn_inferior (void)
2618 struct target_ops *t;
2620 for (t = current_target.beneath; t != NULL; t = t->beneath)
2622 if (t->to_mourn_inferior != NULL)
2624 t->to_mourn_inferior (t);
2626 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2628 /* We no longer need to keep handles on any of the object files.
2629 Make sure to release them to avoid unnecessarily locking any
2630 of them while we're not actually debugging. */
2631 bfd_cache_close_all ();
2637 internal_error (__FILE__, __LINE__,
2638 _("could not find a target to follow mourn inferior"));
2641 /* Look for a target which can describe architectural features, starting
2642 from TARGET. If we find one, return its description. */
2644 const struct target_desc *
2645 target_read_description (struct target_ops *target)
2647 struct target_ops *t;
2649 for (t = target; t != NULL; t = t->beneath)
2650 if (t->to_read_description != NULL)
2652 const struct target_desc *tdesc;
2654 tdesc = t->to_read_description (t);
2662 /* The default implementation of to_search_memory.
2663 This implements a basic search of memory, reading target memory and
2664 performing the search here (as opposed to performing the search in on the
2665 target side with, for example, gdbserver). */
2668 simple_search_memory (struct target_ops *ops,
2669 CORE_ADDR start_addr, ULONGEST search_space_len,
2670 const gdb_byte *pattern, ULONGEST pattern_len,
2671 CORE_ADDR *found_addrp)
2673 /* NOTE: also defined in find.c testcase. */
2674 #define SEARCH_CHUNK_SIZE 16000
2675 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2676 /* Buffer to hold memory contents for searching. */
2677 gdb_byte *search_buf;
2678 unsigned search_buf_size;
2679 struct cleanup *old_cleanups;
2681 search_buf_size = chunk_size + pattern_len - 1;
2683 /* No point in trying to allocate a buffer larger than the search space. */
2684 if (search_space_len < search_buf_size)
2685 search_buf_size = search_space_len;
2687 search_buf = malloc (search_buf_size);
2688 if (search_buf == NULL)
2689 error (_("Unable to allocate memory to perform the search."));
2690 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2692 /* Prime the search buffer. */
2694 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2695 search_buf, start_addr, search_buf_size) != search_buf_size)
2697 warning (_("Unable to access target memory at %s, halting search."),
2698 hex_string (start_addr));
2699 do_cleanups (old_cleanups);
2703 /* Perform the search.
2705 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2706 When we've scanned N bytes we copy the trailing bytes to the start and
2707 read in another N bytes. */
2709 while (search_space_len >= pattern_len)
2711 gdb_byte *found_ptr;
2712 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2714 found_ptr = memmem (search_buf, nr_search_bytes,
2715 pattern, pattern_len);
2717 if (found_ptr != NULL)
2719 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2721 *found_addrp = found_addr;
2722 do_cleanups (old_cleanups);
2726 /* Not found in this chunk, skip to next chunk. */
2728 /* Don't let search_space_len wrap here, it's unsigned. */
2729 if (search_space_len >= chunk_size)
2730 search_space_len -= chunk_size;
2732 search_space_len = 0;
2734 if (search_space_len >= pattern_len)
2736 unsigned keep_len = search_buf_size - chunk_size;
2737 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2740 /* Copy the trailing part of the previous iteration to the front
2741 of the buffer for the next iteration. */
2742 gdb_assert (keep_len == pattern_len - 1);
2743 memcpy (search_buf, search_buf + chunk_size, keep_len);
2745 nr_to_read = min (search_space_len - keep_len, chunk_size);
2747 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2748 search_buf + keep_len, read_addr,
2749 nr_to_read) != nr_to_read)
2751 warning (_("Unable to access target "
2752 "memory at %s, halting search."),
2753 hex_string (read_addr));
2754 do_cleanups (old_cleanups);
2758 start_addr += chunk_size;
2764 do_cleanups (old_cleanups);
2768 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2769 sequence of bytes in PATTERN with length PATTERN_LEN.
2771 The result is 1 if found, 0 if not found, and -1 if there was an error
2772 requiring halting of the search (e.g. memory read error).
2773 If the pattern is found the address is recorded in FOUND_ADDRP. */
2776 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2777 const gdb_byte *pattern, ULONGEST pattern_len,
2778 CORE_ADDR *found_addrp)
2780 struct target_ops *t;
2783 /* We don't use INHERIT to set current_target.to_search_memory,
2784 so we have to scan the target stack and handle targetdebug
2788 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2789 hex_string (start_addr));
2791 for (t = current_target.beneath; t != NULL; t = t->beneath)
2792 if (t->to_search_memory != NULL)
2797 found = t->to_search_memory (t, start_addr, search_space_len,
2798 pattern, pattern_len, found_addrp);
2802 /* If a special version of to_search_memory isn't available, use the
2804 found = simple_search_memory (current_target.beneath,
2805 start_addr, search_space_len,
2806 pattern, pattern_len, found_addrp);
2810 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2815 /* Look through the currently pushed targets. If none of them will
2816 be able to restart the currently running process, issue an error
2820 target_require_runnable (void)
2822 struct target_ops *t;
2824 for (t = target_stack; t != NULL; t = t->beneath)
2826 /* If this target knows how to create a new program, then
2827 assume we will still be able to after killing the current
2828 one. Either killing and mourning will not pop T, or else
2829 find_default_run_target will find it again. */
2830 if (t->to_create_inferior != NULL)
2833 /* Do not worry about thread_stratum targets that can not
2834 create inferiors. Assume they will be pushed again if
2835 necessary, and continue to the process_stratum. */
2836 if (t->to_stratum == thread_stratum
2837 || t->to_stratum == arch_stratum)
2840 error (_("The \"%s\" target does not support \"run\". "
2841 "Try \"help target\" or \"continue\"."),
2845 /* This function is only called if the target is running. In that
2846 case there should have been a process_stratum target and it
2847 should either know how to create inferiors, or not... */
2848 internal_error (__FILE__, __LINE__, _("No targets found"));
2851 /* Look through the list of possible targets for a target that can
2852 execute a run or attach command without any other data. This is
2853 used to locate the default process stratum.
2855 If DO_MESG is not NULL, the result is always valid (error() is
2856 called for errors); else, return NULL on error. */
2858 static struct target_ops *
2859 find_default_run_target (char *do_mesg)
2861 struct target_ops **t;
2862 struct target_ops *runable = NULL;
2867 for (t = target_structs; t < target_structs + target_struct_size;
2870 if ((*t)->to_can_run && target_can_run (*t))
2880 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2889 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2891 struct target_ops *t;
2893 t = find_default_run_target ("attach");
2894 (t->to_attach) (t, args, from_tty);
2899 find_default_create_inferior (struct target_ops *ops,
2900 char *exec_file, char *allargs, char **env,
2903 struct target_ops *t;
2905 t = find_default_run_target ("run");
2906 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2911 find_default_can_async_p (void)
2913 struct target_ops *t;
2915 /* This may be called before the target is pushed on the stack;
2916 look for the default process stratum. If there's none, gdb isn't
2917 configured with a native debugger, and target remote isn't
2919 t = find_default_run_target (NULL);
2920 if (t && t->to_can_async_p)
2921 return (t->to_can_async_p) ();
2926 find_default_is_async_p (void)
2928 struct target_ops *t;
2930 /* This may be called before the target is pushed on the stack;
2931 look for the default process stratum. If there's none, gdb isn't
2932 configured with a native debugger, and target remote isn't
2934 t = find_default_run_target (NULL);
2935 if (t && t->to_is_async_p)
2936 return (t->to_is_async_p) ();
2941 find_default_supports_non_stop (void)
2943 struct target_ops *t;
2945 t = find_default_run_target (NULL);
2946 if (t && t->to_supports_non_stop)
2947 return (t->to_supports_non_stop) ();
2952 target_supports_non_stop (void)
2954 struct target_ops *t;
2956 for (t = ¤t_target; t != NULL; t = t->beneath)
2957 if (t->to_supports_non_stop)
2958 return t->to_supports_non_stop ();
2965 target_get_osdata (const char *type)
2967 struct target_ops *t;
2969 /* If we're already connected to something that can get us OS
2970 related data, use it. Otherwise, try using the native
2972 if (current_target.to_stratum >= process_stratum)
2973 t = current_target.beneath;
2975 t = find_default_run_target ("get OS data");
2980 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2983 /* Determine the current address space of thread PTID. */
2985 struct address_space *
2986 target_thread_address_space (ptid_t ptid)
2988 struct address_space *aspace;
2989 struct inferior *inf;
2990 struct target_ops *t;
2992 for (t = current_target.beneath; t != NULL; t = t->beneath)
2994 if (t->to_thread_address_space != NULL)
2996 aspace = t->to_thread_address_space (t, ptid);
2997 gdb_assert (aspace);
3000 fprintf_unfiltered (gdb_stdlog,
3001 "target_thread_address_space (%s) = %d\n",
3002 target_pid_to_str (ptid),
3003 address_space_num (aspace));
3008 /* Fall-back to the "main" address space of the inferior. */
3009 inf = find_inferior_pid (ptid_get_pid (ptid));
3011 if (inf == NULL || inf->aspace == NULL)
3012 internal_error (__FILE__, __LINE__,
3013 _("Can't determine the current "
3014 "address space of thread %s\n"),
3015 target_pid_to_str (ptid));
3021 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3023 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
3027 default_watchpoint_addr_within_range (struct target_ops *target,
3029 CORE_ADDR start, int length)
3031 return addr >= start && addr < start + length;
3034 static struct gdbarch *
3035 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3037 return target_gdbarch;
3053 return_minus_one (void)
3058 /* Find a single runnable target in the stack and return it. If for
3059 some reason there is more than one, return NULL. */
3062 find_run_target (void)
3064 struct target_ops **t;
3065 struct target_ops *runable = NULL;
3070 for (t = target_structs; t < target_structs + target_struct_size; ++t)
3072 if ((*t)->to_can_run && target_can_run (*t))
3079 return (count == 1 ? runable : NULL);
3083 * Find the next target down the stack from the specified target.
3087 find_target_beneath (struct target_ops *t)
3093 /* The inferior process has died. Long live the inferior! */
3096 generic_mourn_inferior (void)
3100 ptid = inferior_ptid;
3101 inferior_ptid = null_ptid;
3103 if (!ptid_equal (ptid, null_ptid))
3105 int pid = ptid_get_pid (ptid);
3106 exit_inferior (pid);
3109 breakpoint_init_inferior (inf_exited);
3110 registers_changed ();
3112 reopen_exec_file ();
3113 reinit_frame_cache ();
3115 if (deprecated_detach_hook)
3116 deprecated_detach_hook ();
3119 /* Helper function for child_wait and the derivatives of child_wait.
3120 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3121 translation of that in OURSTATUS. */
3123 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
3125 if (WIFEXITED (hoststatus))
3127 ourstatus->kind = TARGET_WAITKIND_EXITED;
3128 ourstatus->value.integer = WEXITSTATUS (hoststatus);
3130 else if (!WIFSTOPPED (hoststatus))
3132 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3133 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
3137 ourstatus->kind = TARGET_WAITKIND_STOPPED;
3138 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
3142 /* Convert a normal process ID to a string. Returns the string in a
3146 normal_pid_to_str (ptid_t ptid)
3148 static char buf[32];
3150 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3155 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3157 return normal_pid_to_str (ptid);
3160 /* Error-catcher for target_find_memory_regions. */
3162 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3164 error (_("Command not implemented for this target."));
3168 /* Error-catcher for target_make_corefile_notes. */
3170 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3172 error (_("Command not implemented for this target."));
3176 /* Error-catcher for target_get_bookmark. */
3178 dummy_get_bookmark (char *ignore1, int ignore2)
3184 /* Error-catcher for target_goto_bookmark. */
3186 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3191 /* Set up the handful of non-empty slots needed by the dummy target
3195 init_dummy_target (void)
3197 dummy_target.to_shortname = "None";
3198 dummy_target.to_longname = "None";
3199 dummy_target.to_doc = "";
3200 dummy_target.to_attach = find_default_attach;
3201 dummy_target.to_detach =
3202 (void (*)(struct target_ops *, char *, int))target_ignore;
3203 dummy_target.to_create_inferior = find_default_create_inferior;
3204 dummy_target.to_can_async_p = find_default_can_async_p;
3205 dummy_target.to_is_async_p = find_default_is_async_p;
3206 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3207 dummy_target.to_pid_to_str = dummy_pid_to_str;
3208 dummy_target.to_stratum = dummy_stratum;
3209 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3210 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3211 dummy_target.to_get_bookmark = dummy_get_bookmark;
3212 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3213 dummy_target.to_xfer_partial = default_xfer_partial;
3214 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3215 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3216 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3217 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3218 dummy_target.to_has_execution = (int (*) (struct target_ops *)) return_zero;
3219 dummy_target.to_stopped_by_watchpoint = return_zero;
3220 dummy_target.to_stopped_data_address =
3221 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3222 dummy_target.to_magic = OPS_MAGIC;
3226 debug_to_open (char *args, int from_tty)
3228 debug_target.to_open (args, from_tty);
3230 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3234 target_close (struct target_ops *targ, int quitting)
3236 if (targ->to_xclose != NULL)
3237 targ->to_xclose (targ, quitting);
3238 else if (targ->to_close != NULL)
3239 targ->to_close (quitting);
3242 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3246 target_attach (char *args, int from_tty)
3248 struct target_ops *t;
3250 for (t = current_target.beneath; t != NULL; t = t->beneath)
3252 if (t->to_attach != NULL)
3254 t->to_attach (t, args, from_tty);
3256 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3262 internal_error (__FILE__, __LINE__,
3263 _("could not find a target to attach"));
3267 target_thread_alive (ptid_t ptid)
3269 struct target_ops *t;
3271 for (t = current_target.beneath; t != NULL; t = t->beneath)
3273 if (t->to_thread_alive != NULL)
3277 retval = t->to_thread_alive (t, ptid);
3279 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3280 PIDGET (ptid), retval);
3290 target_find_new_threads (void)
3292 struct target_ops *t;
3294 for (t = current_target.beneath; t != NULL; t = t->beneath)
3296 if (t->to_find_new_threads != NULL)
3298 t->to_find_new_threads (t);
3300 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3308 target_stop (ptid_t ptid)
3312 warning (_("May not interrupt or stop the target, ignoring attempt"));
3316 (*current_target.to_stop) (ptid);
3320 debug_to_post_attach (int pid)
3322 debug_target.to_post_attach (pid);
3324 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3327 /* Return a pretty printed form of target_waitstatus.
3328 Space for the result is malloc'd, caller must free. */
3331 target_waitstatus_to_string (const struct target_waitstatus *ws)
3333 const char *kind_str = "status->kind = ";
3337 case TARGET_WAITKIND_EXITED:
3338 return xstrprintf ("%sexited, status = %d",
3339 kind_str, ws->value.integer);
3340 case TARGET_WAITKIND_STOPPED:
3341 return xstrprintf ("%sstopped, signal = %s",
3342 kind_str, target_signal_to_name (ws->value.sig));
3343 case TARGET_WAITKIND_SIGNALLED:
3344 return xstrprintf ("%ssignalled, signal = %s",
3345 kind_str, target_signal_to_name (ws->value.sig));
3346 case TARGET_WAITKIND_LOADED:
3347 return xstrprintf ("%sloaded", kind_str);
3348 case TARGET_WAITKIND_FORKED:
3349 return xstrprintf ("%sforked", kind_str);
3350 case TARGET_WAITKIND_VFORKED:
3351 return xstrprintf ("%svforked", kind_str);
3352 case TARGET_WAITKIND_EXECD:
3353 return xstrprintf ("%sexecd", kind_str);
3354 case TARGET_WAITKIND_SYSCALL_ENTRY:
3355 return xstrprintf ("%sentered syscall", kind_str);
3356 case TARGET_WAITKIND_SYSCALL_RETURN:
3357 return xstrprintf ("%sexited syscall", kind_str);
3358 case TARGET_WAITKIND_SPURIOUS:
3359 return xstrprintf ("%sspurious", kind_str);
3360 case TARGET_WAITKIND_IGNORE:
3361 return xstrprintf ("%signore", kind_str);
3362 case TARGET_WAITKIND_NO_HISTORY:
3363 return xstrprintf ("%sno-history", kind_str);
3365 return xstrprintf ("%sunknown???", kind_str);
3370 debug_print_register (const char * func,
3371 struct regcache *regcache, int regno)
3373 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3375 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3376 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3377 && gdbarch_register_name (gdbarch, regno) != NULL
3378 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3379 fprintf_unfiltered (gdb_stdlog, "(%s)",
3380 gdbarch_register_name (gdbarch, regno));
3382 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3383 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3385 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3386 int i, size = register_size (gdbarch, regno);
3387 unsigned char buf[MAX_REGISTER_SIZE];
3389 regcache_raw_collect (regcache, regno, buf);
3390 fprintf_unfiltered (gdb_stdlog, " = ");
3391 for (i = 0; i < size; i++)
3393 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3395 if (size <= sizeof (LONGEST))
3397 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3399 fprintf_unfiltered (gdb_stdlog, " %s %s",
3400 core_addr_to_string_nz (val), plongest (val));
3403 fprintf_unfiltered (gdb_stdlog, "\n");
3407 target_fetch_registers (struct regcache *regcache, int regno)
3409 struct target_ops *t;
3411 for (t = current_target.beneath; t != NULL; t = t->beneath)
3413 if (t->to_fetch_registers != NULL)
3415 t->to_fetch_registers (t, regcache, regno);
3417 debug_print_register ("target_fetch_registers", regcache, regno);
3424 target_store_registers (struct regcache *regcache, int regno)
3426 struct target_ops *t;
3428 if (!may_write_registers)
3429 error (_("Writing to registers is not allowed (regno %d)"), regno);
3431 for (t = current_target.beneath; t != NULL; t = t->beneath)
3433 if (t->to_store_registers != NULL)
3435 t->to_store_registers (t, regcache, regno);
3438 debug_print_register ("target_store_registers", regcache, regno);
3448 target_core_of_thread (ptid_t ptid)
3450 struct target_ops *t;
3452 for (t = current_target.beneath; t != NULL; t = t->beneath)
3454 if (t->to_core_of_thread != NULL)
3456 int retval = t->to_core_of_thread (t, ptid);
3459 fprintf_unfiltered (gdb_stdlog,
3460 "target_core_of_thread (%d) = %d\n",
3461 PIDGET (ptid), retval);
3470 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3472 struct target_ops *t;
3474 for (t = current_target.beneath; t != NULL; t = t->beneath)
3476 if (t->to_verify_memory != NULL)
3478 int retval = t->to_verify_memory (t, data, memaddr, size);
3481 fprintf_unfiltered (gdb_stdlog,
3482 "target_verify_memory (%s, %s) = %d\n",
3483 paddress (target_gdbarch, memaddr),
3494 debug_to_prepare_to_store (struct regcache *regcache)
3496 debug_target.to_prepare_to_store (regcache);
3498 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3502 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3503 int write, struct mem_attrib *attrib,
3504 struct target_ops *target)
3508 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3511 fprintf_unfiltered (gdb_stdlog,
3512 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3513 paddress (target_gdbarch, memaddr), len,
3514 write ? "write" : "read", retval);
3520 fputs_unfiltered (", bytes =", gdb_stdlog);
3521 for (i = 0; i < retval; i++)
3523 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3525 if (targetdebug < 2 && i > 0)
3527 fprintf_unfiltered (gdb_stdlog, " ...");
3530 fprintf_unfiltered (gdb_stdlog, "\n");
3533 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3537 fputc_unfiltered ('\n', gdb_stdlog);
3543 debug_to_files_info (struct target_ops *target)
3545 debug_target.to_files_info (target);
3547 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3551 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3552 struct bp_target_info *bp_tgt)
3556 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3558 fprintf_unfiltered (gdb_stdlog,
3559 "target_insert_breakpoint (%s, xxx) = %ld\n",
3560 core_addr_to_string (bp_tgt->placed_address),
3561 (unsigned long) retval);
3566 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3567 struct bp_target_info *bp_tgt)
3571 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3573 fprintf_unfiltered (gdb_stdlog,
3574 "target_remove_breakpoint (%s, xxx) = %ld\n",
3575 core_addr_to_string (bp_tgt->placed_address),
3576 (unsigned long) retval);
3581 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3585 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3587 fprintf_unfiltered (gdb_stdlog,
3588 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3589 (unsigned long) type,
3590 (unsigned long) cnt,
3591 (unsigned long) from_tty,
3592 (unsigned long) retval);
3597 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3601 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3603 fprintf_unfiltered (gdb_stdlog,
3604 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3605 core_addr_to_string (addr), (unsigned long) len,
3606 core_addr_to_string (retval));
3611 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3612 struct expression *cond)
3616 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3619 fprintf_unfiltered (gdb_stdlog,
3620 "target_can_accel_watchpoint_condition "
3621 "(%s, %d, %d, %s) = %ld\n",
3622 core_addr_to_string (addr), len, rw,
3623 host_address_to_string (cond), (unsigned long) retval);
3628 debug_to_stopped_by_watchpoint (void)
3632 retval = debug_target.to_stopped_by_watchpoint ();
3634 fprintf_unfiltered (gdb_stdlog,
3635 "target_stopped_by_watchpoint () = %ld\n",
3636 (unsigned long) retval);
3641 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3645 retval = debug_target.to_stopped_data_address (target, addr);
3647 fprintf_unfiltered (gdb_stdlog,
3648 "target_stopped_data_address ([%s]) = %ld\n",
3649 core_addr_to_string (*addr),
3650 (unsigned long)retval);
3655 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3657 CORE_ADDR start, int length)
3661 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3664 fprintf_filtered (gdb_stdlog,
3665 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3666 core_addr_to_string (addr), core_addr_to_string (start),
3672 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3673 struct bp_target_info *bp_tgt)
3677 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3679 fprintf_unfiltered (gdb_stdlog,
3680 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3681 core_addr_to_string (bp_tgt->placed_address),
3682 (unsigned long) retval);
3687 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3688 struct bp_target_info *bp_tgt)
3692 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3694 fprintf_unfiltered (gdb_stdlog,
3695 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3696 core_addr_to_string (bp_tgt->placed_address),
3697 (unsigned long) retval);
3702 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3703 struct expression *cond)
3707 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3709 fprintf_unfiltered (gdb_stdlog,
3710 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3711 core_addr_to_string (addr), len, type,
3712 host_address_to_string (cond), (unsigned long) retval);
3717 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3718 struct expression *cond)
3722 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3724 fprintf_unfiltered (gdb_stdlog,
3725 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3726 core_addr_to_string (addr), len, type,
3727 host_address_to_string (cond), (unsigned long) retval);
3732 debug_to_terminal_init (void)
3734 debug_target.to_terminal_init ();
3736 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3740 debug_to_terminal_inferior (void)
3742 debug_target.to_terminal_inferior ();
3744 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3748 debug_to_terminal_ours_for_output (void)
3750 debug_target.to_terminal_ours_for_output ();
3752 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3756 debug_to_terminal_ours (void)
3758 debug_target.to_terminal_ours ();
3760 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3764 debug_to_terminal_save_ours (void)
3766 debug_target.to_terminal_save_ours ();
3768 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3772 debug_to_terminal_info (char *arg, int from_tty)
3774 debug_target.to_terminal_info (arg, from_tty);
3776 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3781 debug_to_load (char *args, int from_tty)
3783 debug_target.to_load (args, from_tty);
3785 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3789 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
3793 retval = debug_target.to_lookup_symbol (name, addrp);
3795 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
3801 debug_to_post_startup_inferior (ptid_t ptid)
3803 debug_target.to_post_startup_inferior (ptid);
3805 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3810 debug_to_insert_fork_catchpoint (int pid)
3814 retval = debug_target.to_insert_fork_catchpoint (pid);
3816 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
3823 debug_to_remove_fork_catchpoint (int pid)
3827 retval = debug_target.to_remove_fork_catchpoint (pid);
3829 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3836 debug_to_insert_vfork_catchpoint (int pid)
3840 retval = debug_target.to_insert_vfork_catchpoint (pid);
3842 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
3849 debug_to_remove_vfork_catchpoint (int pid)
3853 retval = debug_target.to_remove_vfork_catchpoint (pid);
3855 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3862 debug_to_insert_exec_catchpoint (int pid)
3866 retval = debug_target.to_insert_exec_catchpoint (pid);
3868 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
3875 debug_to_remove_exec_catchpoint (int pid)
3879 retval = debug_target.to_remove_exec_catchpoint (pid);
3881 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
3888 debug_to_has_exited (int pid, int wait_status, int *exit_status)
3892 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
3894 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
3895 pid, wait_status, *exit_status, has_exited);
3901 debug_to_can_run (void)
3905 retval = debug_target.to_can_run ();
3907 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
3913 debug_to_notice_signals (ptid_t ptid)
3915 debug_target.to_notice_signals (ptid);
3917 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
3921 static struct gdbarch *
3922 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
3924 struct gdbarch *retval;
3926 retval = debug_target.to_thread_architecture (ops, ptid);
3928 fprintf_unfiltered (gdb_stdlog,
3929 "target_thread_architecture (%s) = %s [%s]\n",
3930 target_pid_to_str (ptid),
3931 host_address_to_string (retval),
3932 gdbarch_bfd_arch_info (retval)->printable_name);
3937 debug_to_stop (ptid_t ptid)
3939 debug_target.to_stop (ptid);
3941 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
3942 target_pid_to_str (ptid));
3946 debug_to_rcmd (char *command,
3947 struct ui_file *outbuf)
3949 debug_target.to_rcmd (command, outbuf);
3950 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
3954 debug_to_pid_to_exec_file (int pid)
3958 exec_file = debug_target.to_pid_to_exec_file (pid);
3960 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
3967 setup_target_debug (void)
3969 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3971 current_target.to_open = debug_to_open;
3972 current_target.to_post_attach = debug_to_post_attach;
3973 current_target.to_prepare_to_store = debug_to_prepare_to_store;
3974 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
3975 current_target.to_files_info = debug_to_files_info;
3976 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
3977 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
3978 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
3979 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
3980 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
3981 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
3982 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
3983 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
3984 current_target.to_stopped_data_address = debug_to_stopped_data_address;
3985 current_target.to_watchpoint_addr_within_range
3986 = debug_to_watchpoint_addr_within_range;
3987 current_target.to_region_ok_for_hw_watchpoint
3988 = debug_to_region_ok_for_hw_watchpoint;
3989 current_target.to_can_accel_watchpoint_condition
3990 = debug_to_can_accel_watchpoint_condition;
3991 current_target.to_terminal_init = debug_to_terminal_init;
3992 current_target.to_terminal_inferior = debug_to_terminal_inferior;
3993 current_target.to_terminal_ours_for_output
3994 = debug_to_terminal_ours_for_output;
3995 current_target.to_terminal_ours = debug_to_terminal_ours;
3996 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
3997 current_target.to_terminal_info = debug_to_terminal_info;
3998 current_target.to_load = debug_to_load;
3999 current_target.to_lookup_symbol = debug_to_lookup_symbol;
4000 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4001 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4002 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4003 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4004 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4005 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4006 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4007 current_target.to_has_exited = debug_to_has_exited;
4008 current_target.to_can_run = debug_to_can_run;
4009 current_target.to_notice_signals = debug_to_notice_signals;
4010 current_target.to_stop = debug_to_stop;
4011 current_target.to_rcmd = debug_to_rcmd;
4012 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4013 current_target.to_thread_architecture = debug_to_thread_architecture;
4017 static char targ_desc[] =
4018 "Names of targets and files being debugged.\nShows the entire \
4019 stack of targets currently in use (including the exec-file,\n\
4020 core-file, and process, if any), as well as the symbol file name.";
4023 do_monitor_command (char *cmd,
4026 if ((current_target.to_rcmd
4027 == (void (*) (char *, struct ui_file *)) tcomplain)
4028 || (current_target.to_rcmd == debug_to_rcmd
4029 && (debug_target.to_rcmd
4030 == (void (*) (char *, struct ui_file *)) tcomplain)))
4031 error (_("\"monitor\" command not supported by this target."));
4032 target_rcmd (cmd, gdb_stdtarg);
4035 /* Print the name of each layers of our target stack. */
4038 maintenance_print_target_stack (char *cmd, int from_tty)
4040 struct target_ops *t;
4042 printf_filtered (_("The current target stack is:\n"));
4044 for (t = target_stack; t != NULL; t = t->beneath)
4046 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4050 /* Controls if async mode is permitted. */
4051 int target_async_permitted = 0;
4053 /* The set command writes to this variable. If the inferior is
4054 executing, linux_nat_async_permitted is *not* updated. */
4055 static int target_async_permitted_1 = 0;
4058 set_maintenance_target_async_permitted (char *args, int from_tty,
4059 struct cmd_list_element *c)
4061 if (have_live_inferiors ())
4063 target_async_permitted_1 = target_async_permitted;
4064 error (_("Cannot change this setting while the inferior is running."));
4067 target_async_permitted = target_async_permitted_1;
4071 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
4072 struct cmd_list_element *c,
4075 fprintf_filtered (file,
4076 _("Controlling the inferior in "
4077 "asynchronous mode is %s.\n"), value);
4080 /* Temporary copies of permission settings. */
4082 static int may_write_registers_1 = 1;
4083 static int may_write_memory_1 = 1;
4084 static int may_insert_breakpoints_1 = 1;
4085 static int may_insert_tracepoints_1 = 1;
4086 static int may_insert_fast_tracepoints_1 = 1;
4087 static int may_stop_1 = 1;
4089 /* Make the user-set values match the real values again. */
4092 update_target_permissions (void)
4094 may_write_registers_1 = may_write_registers;
4095 may_write_memory_1 = may_write_memory;
4096 may_insert_breakpoints_1 = may_insert_breakpoints;
4097 may_insert_tracepoints_1 = may_insert_tracepoints;
4098 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4099 may_stop_1 = may_stop;
4102 /* The one function handles (most of) the permission flags in the same
4106 set_target_permissions (char *args, int from_tty,
4107 struct cmd_list_element *c)
4109 if (target_has_execution)
4111 update_target_permissions ();
4112 error (_("Cannot change this setting while the inferior is running."));
4115 /* Make the real values match the user-changed values. */
4116 may_write_registers = may_write_registers_1;
4117 may_insert_breakpoints = may_insert_breakpoints_1;
4118 may_insert_tracepoints = may_insert_tracepoints_1;
4119 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4120 may_stop = may_stop_1;
4121 update_observer_mode ();
4124 /* Set memory write permission independently of observer mode. */
4127 set_write_memory_permission (char *args, int from_tty,
4128 struct cmd_list_element *c)
4130 /* Make the real values match the user-changed values. */
4131 may_write_memory = may_write_memory_1;
4132 update_observer_mode ();
4137 initialize_targets (void)
4139 init_dummy_target ();
4140 push_target (&dummy_target);
4142 add_info ("target", target_info, targ_desc);
4143 add_info ("files", target_info, targ_desc);
4145 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4146 Set target debugging."), _("\
4147 Show target debugging."), _("\
4148 When non-zero, target debugging is enabled. Higher numbers are more\n\
4149 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4153 &setdebuglist, &showdebuglist);
4155 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4156 &trust_readonly, _("\
4157 Set mode for reading from readonly sections."), _("\
4158 Show mode for reading from readonly sections."), _("\
4159 When this mode is on, memory reads from readonly sections (such as .text)\n\
4160 will be read from the object file instead of from the target. This will\n\
4161 result in significant performance improvement for remote targets."),
4163 show_trust_readonly,
4164 &setlist, &showlist);
4166 add_com ("monitor", class_obscure, do_monitor_command,
4167 _("Send a command to the remote monitor (remote targets only)."));
4169 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4170 _("Print the name of each layer of the internal target stack."),
4171 &maintenanceprintlist);
4173 add_setshow_boolean_cmd ("target-async", no_class,
4174 &target_async_permitted_1, _("\
4175 Set whether gdb controls the inferior in asynchronous mode."), _("\
4176 Show whether gdb controls the inferior in asynchronous mode."), _("\
4177 Tells gdb whether to control the inferior in asynchronous mode."),
4178 set_maintenance_target_async_permitted,
4179 show_maintenance_target_async_permitted,
4183 add_setshow_boolean_cmd ("stack-cache", class_support,
4184 &stack_cache_enabled_p_1, _("\
4185 Set cache use for stack access."), _("\
4186 Show cache use for stack access."), _("\
4187 When on, use the data cache for all stack access, regardless of any\n\
4188 configured memory regions. This improves remote performance significantly.\n\
4189 By default, caching for stack access is on."),
4190 set_stack_cache_enabled_p,
4191 show_stack_cache_enabled_p,
4192 &setlist, &showlist);
4194 add_setshow_boolean_cmd ("may-write-registers", class_support,
4195 &may_write_registers_1, _("\
4196 Set permission to write into registers."), _("\
4197 Show permission to write into registers."), _("\
4198 When this permission is on, GDB may write into the target's registers.\n\
4199 Otherwise, any sort of write attempt will result in an error."),
4200 set_target_permissions, NULL,
4201 &setlist, &showlist);
4203 add_setshow_boolean_cmd ("may-write-memory", class_support,
4204 &may_write_memory_1, _("\
4205 Set permission to write into target memory."), _("\
4206 Show permission to write into target memory."), _("\
4207 When this permission is on, GDB may write into the target's memory.\n\
4208 Otherwise, any sort of write attempt will result in an error."),
4209 set_write_memory_permission, NULL,
4210 &setlist, &showlist);
4212 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4213 &may_insert_breakpoints_1, _("\
4214 Set permission to insert breakpoints in the target."), _("\
4215 Show permission to insert breakpoints in the target."), _("\
4216 When this permission is on, GDB may insert breakpoints in the program.\n\
4217 Otherwise, any sort of insertion attempt will result in an error."),
4218 set_target_permissions, NULL,
4219 &setlist, &showlist);
4221 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4222 &may_insert_tracepoints_1, _("\
4223 Set permission to insert tracepoints in the target."), _("\
4224 Show permission to insert tracepoints in the target."), _("\
4225 When this permission is on, GDB may insert tracepoints in the program.\n\
4226 Otherwise, any sort of insertion attempt will result in an error."),
4227 set_target_permissions, NULL,
4228 &setlist, &showlist);
4230 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4231 &may_insert_fast_tracepoints_1, _("\
4232 Set permission to insert fast tracepoints in the target."), _("\
4233 Show permission to insert fast tracepoints in the target."), _("\
4234 When this permission is on, GDB may insert fast tracepoints.\n\
4235 Otherwise, any sort of insertion attempt will result in an error."),
4236 set_target_permissions, NULL,
4237 &setlist, &showlist);
4239 add_setshow_boolean_cmd ("may-interrupt", class_support,
4241 Set permission to interrupt or signal the target."), _("\
4242 Show permission to interrupt or signal the target."), _("\
4243 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4244 Otherwise, any attempt to interrupt or stop will be ignored."),
4245 set_target_permissions, NULL,
4246 &setlist, &showlist);
4249 target_dcache = dcache_init ();