1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2014 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "target-dcache.h"
36 #include "gdb_assert.h"
38 #include "exceptions.h"
39 #include "target-descriptions.h"
40 #include "gdbthread.h"
43 #include "inline-frame.h"
44 #include "tracepoint.h"
45 #include "gdb/fileio.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (struct target_ops *, const 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 (struct target_ops *,
58 static void default_rcmd (struct target_ops *, char *, struct ui_file *);
60 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
63 static void tcomplain (void) ATTRIBUTE_NORETURN;
65 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
67 static int return_zero (void);
69 static int return_minus_one (void);
71 static void *return_null (void);
73 void target_ignore (void);
75 static void target_command (char *, int);
77 static struct target_ops *find_default_run_target (char *);
79 static target_xfer_partial_ftype default_xfer_partial;
81 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
84 static int dummy_find_memory_regions (struct target_ops *self,
85 find_memory_region_ftype ignore1,
88 static char *dummy_make_corefile_notes (struct target_ops *self,
89 bfd *ignore1, int *ignore2);
91 static int find_default_can_async_p (struct target_ops *ignore);
93 static int find_default_is_async_p (struct target_ops *ignore);
95 static enum exec_direction_kind default_execution_direction
96 (struct target_ops *self);
98 #include "target-delegates.c"
100 static void init_dummy_target (void);
102 static struct target_ops debug_target;
104 static void debug_to_open (char *, int);
106 static void debug_to_prepare_to_store (struct target_ops *self,
109 static void debug_to_files_info (struct target_ops *);
111 static int debug_to_insert_breakpoint (struct target_ops *, struct gdbarch *,
112 struct bp_target_info *);
114 static int debug_to_remove_breakpoint (struct target_ops *, struct gdbarch *,
115 struct bp_target_info *);
117 static int debug_to_can_use_hw_breakpoint (struct target_ops *self,
120 static int debug_to_insert_hw_breakpoint (struct target_ops *self,
122 struct bp_target_info *);
124 static int debug_to_remove_hw_breakpoint (struct target_ops *self,
126 struct bp_target_info *);
128 static int debug_to_insert_watchpoint (struct target_ops *self,
130 struct expression *);
132 static int debug_to_remove_watchpoint (struct target_ops *self,
134 struct expression *);
136 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
138 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
139 CORE_ADDR, CORE_ADDR, int);
141 static int debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
144 static int debug_to_can_accel_watchpoint_condition (struct target_ops *self,
146 struct expression *);
148 static void debug_to_terminal_init (struct target_ops *self);
150 static void debug_to_terminal_inferior (struct target_ops *self);
152 static void debug_to_terminal_ours_for_output (struct target_ops *self);
154 static void debug_to_terminal_save_ours (struct target_ops *self);
156 static void debug_to_terminal_ours (struct target_ops *self);
158 static void debug_to_load (struct target_ops *self, char *, int);
160 static int debug_to_can_run (struct target_ops *self);
162 static void debug_to_stop (struct target_ops *self, ptid_t);
164 /* Pointer to array of target architecture structures; the size of the
165 array; the current index into the array; the allocated size of the
167 struct target_ops **target_structs;
168 unsigned target_struct_size;
169 unsigned target_struct_allocsize;
170 #define DEFAULT_ALLOCSIZE 10
172 /* The initial current target, so that there is always a semi-valid
175 static struct target_ops dummy_target;
177 /* Top of target stack. */
179 static struct target_ops *target_stack;
181 /* The target structure we are currently using to talk to a process
182 or file or whatever "inferior" we have. */
184 struct target_ops current_target;
186 /* Command list for target. */
188 static struct cmd_list_element *targetlist = NULL;
190 /* Nonzero if we should trust readonly sections from the
191 executable when reading memory. */
193 static int trust_readonly = 0;
195 /* Nonzero if we should show true memory content including
196 memory breakpoint inserted by gdb. */
198 static int show_memory_breakpoints = 0;
200 /* These globals control whether GDB attempts to perform these
201 operations; they are useful for targets that need to prevent
202 inadvertant disruption, such as in non-stop mode. */
204 int may_write_registers = 1;
206 int may_write_memory = 1;
208 int may_insert_breakpoints = 1;
210 int may_insert_tracepoints = 1;
212 int may_insert_fast_tracepoints = 1;
216 /* Non-zero if we want to see trace of target level stuff. */
218 static unsigned int targetdebug = 0;
220 show_targetdebug (struct ui_file *file, int from_tty,
221 struct cmd_list_element *c, const char *value)
223 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
226 static void setup_target_debug (void);
228 /* The user just typed 'target' without the name of a target. */
231 target_command (char *arg, int from_tty)
233 fputs_filtered ("Argument required (target name). Try `help target'\n",
237 /* Default target_has_* methods for process_stratum targets. */
240 default_child_has_all_memory (struct target_ops *ops)
242 /* If no inferior selected, then we can't read memory here. */
243 if (ptid_equal (inferior_ptid, null_ptid))
250 default_child_has_memory (struct target_ops *ops)
252 /* If no inferior selected, then we can't read memory here. */
253 if (ptid_equal (inferior_ptid, null_ptid))
260 default_child_has_stack (struct target_ops *ops)
262 /* If no inferior selected, there's no stack. */
263 if (ptid_equal (inferior_ptid, null_ptid))
270 default_child_has_registers (struct target_ops *ops)
272 /* Can't read registers from no inferior. */
273 if (ptid_equal (inferior_ptid, null_ptid))
280 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
282 /* If there's no thread selected, then we can't make it run through
284 if (ptid_equal (the_ptid, null_ptid))
292 target_has_all_memory_1 (void)
294 struct target_ops *t;
296 for (t = current_target.beneath; t != NULL; t = t->beneath)
297 if (t->to_has_all_memory (t))
304 target_has_memory_1 (void)
306 struct target_ops *t;
308 for (t = current_target.beneath; t != NULL; t = t->beneath)
309 if (t->to_has_memory (t))
316 target_has_stack_1 (void)
318 struct target_ops *t;
320 for (t = current_target.beneath; t != NULL; t = t->beneath)
321 if (t->to_has_stack (t))
328 target_has_registers_1 (void)
330 struct target_ops *t;
332 for (t = current_target.beneath; t != NULL; t = t->beneath)
333 if (t->to_has_registers (t))
340 target_has_execution_1 (ptid_t the_ptid)
342 struct target_ops *t;
344 for (t = current_target.beneath; t != NULL; t = t->beneath)
345 if (t->to_has_execution (t, the_ptid))
352 target_has_execution_current (void)
354 return target_has_execution_1 (inferior_ptid);
357 /* Complete initialization of T. This ensures that various fields in
358 T are set, if needed by the target implementation. */
361 complete_target_initialization (struct target_ops *t)
363 /* Provide default values for all "must have" methods. */
364 if (t->to_xfer_partial == NULL)
365 t->to_xfer_partial = default_xfer_partial;
367 if (t->to_has_all_memory == NULL)
368 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
370 if (t->to_has_memory == NULL)
371 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
373 if (t->to_has_stack == NULL)
374 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
376 if (t->to_has_registers == NULL)
377 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
379 if (t->to_has_execution == NULL)
380 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
382 install_delegators (t);
385 /* Add possible target architecture T to the list and add a new
386 command 'target T->to_shortname'. Set COMPLETER as the command's
387 completer if not NULL. */
390 add_target_with_completer (struct target_ops *t,
391 completer_ftype *completer)
393 struct cmd_list_element *c;
395 complete_target_initialization (t);
399 target_struct_allocsize = DEFAULT_ALLOCSIZE;
400 target_structs = (struct target_ops **) xmalloc
401 (target_struct_allocsize * sizeof (*target_structs));
403 if (target_struct_size >= target_struct_allocsize)
405 target_struct_allocsize *= 2;
406 target_structs = (struct target_ops **)
407 xrealloc ((char *) target_structs,
408 target_struct_allocsize * sizeof (*target_structs));
410 target_structs[target_struct_size++] = t;
412 if (targetlist == NULL)
413 add_prefix_cmd ("target", class_run, target_command, _("\
414 Connect to a target machine or process.\n\
415 The first argument is the type or protocol of the target machine.\n\
416 Remaining arguments are interpreted by the target protocol. For more\n\
417 information on the arguments for a particular protocol, type\n\
418 `help target ' followed by the protocol name."),
419 &targetlist, "target ", 0, &cmdlist);
420 c = add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc,
422 if (completer != NULL)
423 set_cmd_completer (c, completer);
426 /* Add a possible target architecture to the list. */
429 add_target (struct target_ops *t)
431 add_target_with_completer (t, NULL);
437 add_deprecated_target_alias (struct target_ops *t, char *alias)
439 struct cmd_list_element *c;
442 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
444 c = add_cmd (alias, no_class, t->to_open, t->to_doc, &targetlist);
445 alt = xstrprintf ("target %s", t->to_shortname);
446 deprecate_cmd (c, alt);
459 struct target_ops *t;
461 for (t = current_target.beneath; t != NULL; t = t->beneath)
462 if (t->to_kill != NULL)
465 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
475 target_load (char *arg, int from_tty)
477 target_dcache_invalidate ();
478 (*current_target.to_load) (¤t_target, arg, from_tty);
482 target_create_inferior (char *exec_file, char *args,
483 char **env, int from_tty)
485 struct target_ops *t;
487 for (t = current_target.beneath; t != NULL; t = t->beneath)
489 if (t->to_create_inferior != NULL)
491 t->to_create_inferior (t, exec_file, args, env, from_tty);
493 fprintf_unfiltered (gdb_stdlog,
494 "target_create_inferior (%s, %s, xxx, %d)\n",
495 exec_file, args, from_tty);
500 internal_error (__FILE__, __LINE__,
501 _("could not find a target to create inferior"));
505 target_terminal_inferior (void)
507 /* A background resume (``run&'') should leave GDB in control of the
508 terminal. Use target_can_async_p, not target_is_async_p, since at
509 this point the target is not async yet. However, if sync_execution
510 is not set, we know it will become async prior to resume. */
511 if (target_can_async_p () && !sync_execution)
514 /* If GDB is resuming the inferior in the foreground, install
515 inferior's terminal modes. */
516 (*current_target.to_terminal_inferior) (¤t_target);
520 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
521 struct target_ops *t)
523 errno = EIO; /* Can't read/write this location. */
524 return 0; /* No bytes handled. */
530 error (_("You can't do that when your target is `%s'"),
531 current_target.to_shortname);
537 error (_("You can't do that without a process to debug."));
541 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
543 printf_unfiltered (_("No saved terminal information.\n"));
546 /* A default implementation for the to_get_ada_task_ptid target method.
548 This function builds the PTID by using both LWP and TID as part of
549 the PTID lwp and tid elements. The pid used is the pid of the
553 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
555 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
558 static enum exec_direction_kind
559 default_execution_direction (struct target_ops *self)
561 if (!target_can_execute_reverse)
563 else if (!target_can_async_p ())
566 gdb_assert_not_reached ("\
567 to_execution_direction must be implemented for reverse async");
570 /* Go through the target stack from top to bottom, copying over zero
571 entries in current_target, then filling in still empty entries. In
572 effect, we are doing class inheritance through the pushed target
575 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
576 is currently implemented, is that it discards any knowledge of
577 which target an inherited method originally belonged to.
578 Consequently, new new target methods should instead explicitly and
579 locally search the target stack for the target that can handle the
583 update_current_target (void)
585 struct target_ops *t;
587 /* First, reset current's contents. */
588 memset (¤t_target, 0, sizeof (current_target));
590 /* Install the delegators. */
591 install_delegators (¤t_target);
593 #define INHERIT(FIELD, TARGET) \
594 if (!current_target.FIELD) \
595 current_target.FIELD = (TARGET)->FIELD
597 for (t = target_stack; t; t = t->beneath)
599 INHERIT (to_shortname, t);
600 INHERIT (to_longname, t);
602 /* Do not inherit to_open. */
603 /* Do not inherit to_close. */
604 /* Do not inherit to_attach. */
605 /* Do not inherit to_post_attach. */
606 INHERIT (to_attach_no_wait, t);
607 /* Do not inherit to_detach. */
608 /* Do not inherit to_disconnect. */
609 /* Do not inherit to_resume. */
610 /* Do not inherit to_wait. */
611 /* Do not inherit to_fetch_registers. */
612 /* Do not inherit to_store_registers. */
613 /* Do not inherit to_prepare_to_store. */
614 INHERIT (deprecated_xfer_memory, t);
615 /* Do not inherit to_files_info. */
616 /* Do not inherit to_insert_breakpoint. */
617 /* Do not inherit to_remove_breakpoint. */
618 /* Do not inherit to_can_use_hw_breakpoint. */
619 /* Do not inherit to_insert_hw_breakpoint. */
620 /* Do not inherit to_remove_hw_breakpoint. */
621 /* Do not inherit to_ranged_break_num_registers. */
622 /* Do not inherit to_insert_watchpoint. */
623 /* Do not inherit to_remove_watchpoint. */
624 /* Do not inherit to_insert_mask_watchpoint. */
625 /* Do not inherit to_remove_mask_watchpoint. */
626 /* Do not inherit to_stopped_data_address. */
627 INHERIT (to_have_steppable_watchpoint, t);
628 INHERIT (to_have_continuable_watchpoint, t);
629 /* Do not inherit to_stopped_by_watchpoint. */
630 /* Do not inherit to_watchpoint_addr_within_range. */
631 /* Do not inherit to_region_ok_for_hw_watchpoint. */
632 /* Do not inherit to_can_accel_watchpoint_condition. */
633 /* Do not inherit to_masked_watch_num_registers. */
634 /* Do not inherit to_terminal_init. */
635 /* Do not inherit to_terminal_inferior. */
636 /* Do not inherit to_terminal_ours_for_output. */
637 /* Do not inherit to_terminal_ours. */
638 /* Do not inherit to_terminal_save_ours. */
639 /* Do not inherit to_terminal_info. */
640 /* Do not inherit to_kill. */
641 /* Do not inherit to_load. */
642 /* Do no inherit to_create_inferior. */
643 /* Do not inherit to_post_startup_inferior. */
644 /* Do not inherit to_insert_fork_catchpoint. */
645 /* Do not inherit to_remove_fork_catchpoint. */
646 /* Do not inherit to_insert_vfork_catchpoint. */
647 /* Do not inherit to_remove_vfork_catchpoint. */
648 /* Do not inherit to_follow_fork. */
649 /* Do not inherit to_insert_exec_catchpoint. */
650 /* Do not inherit to_remove_exec_catchpoint. */
651 /* Do not inherit to_set_syscall_catchpoint. */
652 /* Do not inherit to_has_exited. */
653 /* Do not inherit to_mourn_inferior. */
654 INHERIT (to_can_run, t);
655 /* Do not inherit to_pass_signals. */
656 /* Do not inherit to_program_signals. */
657 /* Do not inherit to_thread_alive. */
658 /* Do not inherit to_find_new_threads. */
659 /* Do not inherit to_pid_to_str. */
660 /* Do not inherit to_extra_thread_info. */
661 /* Do not inherit to_thread_name. */
662 INHERIT (to_stop, t);
663 /* Do not inherit to_xfer_partial. */
664 /* Do not inherit to_rcmd. */
665 /* Do not inherit to_pid_to_exec_file. */
666 /* Do not inherit to_log_command. */
667 INHERIT (to_stratum, t);
668 /* Do not inherit to_has_all_memory. */
669 /* Do not inherit to_has_memory. */
670 /* Do not inherit to_has_stack. */
671 /* Do not inherit to_has_registers. */
672 /* Do not inherit to_has_execution. */
673 INHERIT (to_has_thread_control, t);
674 /* Do not inherit to_can_async_p. */
675 /* Do not inherit to_is_async_p. */
676 /* Do not inherit to_async. */
677 /* Do not inherit to_find_memory_regions. */
678 /* Do not inherit to_make_corefile_notes. */
679 /* Do not inherit to_get_bookmark. */
680 /* Do not inherit to_goto_bookmark. */
681 /* Do not inherit to_get_thread_local_address. */
682 /* Do not inherit to_can_execute_reverse. */
683 /* Do not inherit to_execution_direction. */
684 /* Do not inherit to_thread_architecture. */
685 /* Do not inherit to_read_description. */
686 /* Do not inherit to_get_ada_task_ptid. */
687 /* Do not inherit to_search_memory. */
688 /* Do not inherit to_supports_multi_process. */
689 /* Do not inherit to_supports_enable_disable_tracepoint. */
690 /* Do not inherit to_supports_string_tracing. */
691 /* Do not inherit to_trace_init. */
692 /* Do not inherit to_download_tracepoint. */
693 /* Do not inherit to_can_download_tracepoint. */
694 /* Do not inherit to_download_trace_state_variable. */
695 /* Do not inherit to_enable_tracepoint. */
696 /* Do not inherit to_disable_tracepoint. */
697 /* Do not inherit to_trace_set_readonly_regions. */
698 /* Do not inherit to_trace_start. */
699 INHERIT (to_get_trace_status, t);
700 INHERIT (to_get_tracepoint_status, t);
701 INHERIT (to_trace_stop, t);
702 INHERIT (to_trace_find, t);
703 INHERIT (to_get_trace_state_variable_value, t);
704 INHERIT (to_save_trace_data, t);
705 INHERIT (to_upload_tracepoints, t);
706 INHERIT (to_upload_trace_state_variables, t);
707 INHERIT (to_get_raw_trace_data, t);
708 INHERIT (to_get_min_fast_tracepoint_insn_len, t);
709 INHERIT (to_set_disconnected_tracing, t);
710 INHERIT (to_set_circular_trace_buffer, t);
711 INHERIT (to_set_trace_buffer_size, t);
712 INHERIT (to_set_trace_notes, t);
713 INHERIT (to_get_tib_address, t);
714 INHERIT (to_set_permissions, t);
715 INHERIT (to_static_tracepoint_marker_at, t);
716 INHERIT (to_static_tracepoint_markers_by_strid, t);
717 INHERIT (to_traceframe_info, t);
718 INHERIT (to_use_agent, t);
719 INHERIT (to_can_use_agent, t);
720 INHERIT (to_augmented_libraries_svr4_read, t);
721 INHERIT (to_magic, t);
722 INHERIT (to_supports_evaluation_of_breakpoint_conditions, t);
723 INHERIT (to_can_run_breakpoint_commands, t);
724 /* Do not inherit to_memory_map. */
725 /* Do not inherit to_flash_erase. */
726 /* Do not inherit to_flash_done. */
730 /* Clean up a target struct so it no longer has any zero pointers in
731 it. Some entries are defaulted to a method that print an error,
732 others are hard-wired to a standard recursive default. */
734 #define de_fault(field, value) \
735 if (!current_target.field) \
736 current_target.field = value
739 (void (*) (char *, int))
742 (void (*) (struct target_ops *))
744 de_fault (deprecated_xfer_memory,
745 (int (*) (CORE_ADDR, gdb_byte *, int, int,
746 struct mem_attrib *, struct target_ops *))
748 de_fault (to_can_run,
749 (int (*) (struct target_ops *))
752 (void (*) (struct target_ops *, ptid_t))
754 current_target.to_read_description = NULL;
755 de_fault (to_get_trace_status,
756 (int (*) (struct target_ops *, struct trace_status *))
758 de_fault (to_get_tracepoint_status,
759 (void (*) (struct target_ops *, struct breakpoint *,
760 struct uploaded_tp *))
762 de_fault (to_trace_stop,
763 (void (*) (struct target_ops *))
765 de_fault (to_trace_find,
766 (int (*) (struct target_ops *,
767 enum trace_find_type, int, CORE_ADDR, CORE_ADDR, int *))
769 de_fault (to_get_trace_state_variable_value,
770 (int (*) (struct target_ops *, int, LONGEST *))
772 de_fault (to_save_trace_data,
773 (int (*) (struct target_ops *, const char *))
775 de_fault (to_upload_tracepoints,
776 (int (*) (struct target_ops *, struct uploaded_tp **))
778 de_fault (to_upload_trace_state_variables,
779 (int (*) (struct target_ops *, struct uploaded_tsv **))
781 de_fault (to_get_raw_trace_data,
782 (LONGEST (*) (struct target_ops *, gdb_byte *, ULONGEST, LONGEST))
784 de_fault (to_get_min_fast_tracepoint_insn_len,
785 (int (*) (struct target_ops *))
787 de_fault (to_set_disconnected_tracing,
788 (void (*) (struct target_ops *, int))
790 de_fault (to_set_circular_trace_buffer,
791 (void (*) (struct target_ops *, int))
793 de_fault (to_set_trace_buffer_size,
794 (void (*) (struct target_ops *, LONGEST))
796 de_fault (to_set_trace_notes,
797 (int (*) (struct target_ops *,
798 const char *, const char *, const char *))
800 de_fault (to_get_tib_address,
801 (int (*) (struct target_ops *, ptid_t, CORE_ADDR *))
803 de_fault (to_set_permissions,
804 (void (*) (struct target_ops *))
806 de_fault (to_static_tracepoint_marker_at,
807 (int (*) (struct target_ops *,
808 CORE_ADDR, struct static_tracepoint_marker *))
810 de_fault (to_static_tracepoint_markers_by_strid,
811 (VEC(static_tracepoint_marker_p) * (*) (struct target_ops *,
814 de_fault (to_traceframe_info,
815 (struct traceframe_info * (*) (struct target_ops *))
817 de_fault (to_supports_evaluation_of_breakpoint_conditions,
818 (int (*) (struct target_ops *))
820 de_fault (to_can_run_breakpoint_commands,
821 (int (*) (struct target_ops *))
823 de_fault (to_use_agent,
824 (int (*) (struct target_ops *, int))
826 de_fault (to_can_use_agent,
827 (int (*) (struct target_ops *))
829 de_fault (to_augmented_libraries_svr4_read,
830 (int (*) (struct target_ops *))
835 /* Finally, position the target-stack beneath the squashed
836 "current_target". That way code looking for a non-inherited
837 target method can quickly and simply find it. */
838 current_target.beneath = target_stack;
841 setup_target_debug ();
844 /* Push a new target type into the stack of the existing target accessors,
845 possibly superseding some of the existing accessors.
847 Rather than allow an empty stack, we always have the dummy target at
848 the bottom stratum, so we can call the function vectors without
852 push_target (struct target_ops *t)
854 struct target_ops **cur;
856 /* Check magic number. If wrong, it probably means someone changed
857 the struct definition, but not all the places that initialize one. */
858 if (t->to_magic != OPS_MAGIC)
860 fprintf_unfiltered (gdb_stderr,
861 "Magic number of %s target struct wrong\n",
863 internal_error (__FILE__, __LINE__,
864 _("failed internal consistency check"));
867 /* Find the proper stratum to install this target in. */
868 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
870 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
874 /* If there's already targets at this stratum, remove them. */
875 /* FIXME: cagney/2003-10-15: I think this should be popping all
876 targets to CUR, and not just those at this stratum level. */
877 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
879 /* There's already something at this stratum level. Close it,
880 and un-hook it from the stack. */
881 struct target_ops *tmp = (*cur);
883 (*cur) = (*cur)->beneath;
888 /* We have removed all targets in our stratum, now add the new one. */
892 update_current_target ();
895 /* Remove a target_ops vector from the stack, wherever it may be.
896 Return how many times it was removed (0 or 1). */
899 unpush_target (struct target_ops *t)
901 struct target_ops **cur;
902 struct target_ops *tmp;
904 if (t->to_stratum == dummy_stratum)
905 internal_error (__FILE__, __LINE__,
906 _("Attempt to unpush the dummy target"));
908 /* Look for the specified target. Note that we assume that a target
909 can only occur once in the target stack. */
911 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
917 /* If we don't find target_ops, quit. Only open targets should be
922 /* Unchain the target. */
924 (*cur) = (*cur)->beneath;
927 update_current_target ();
929 /* Finally close the target. Note we do this after unchaining, so
930 any target method calls from within the target_close
931 implementation don't end up in T anymore. */
938 pop_all_targets_above (enum strata above_stratum)
940 while ((int) (current_target.to_stratum) > (int) above_stratum)
942 if (!unpush_target (target_stack))
944 fprintf_unfiltered (gdb_stderr,
945 "pop_all_targets couldn't find target %s\n",
946 target_stack->to_shortname);
947 internal_error (__FILE__, __LINE__,
948 _("failed internal consistency check"));
955 pop_all_targets (void)
957 pop_all_targets_above (dummy_stratum);
960 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
963 target_is_pushed (struct target_ops *t)
965 struct target_ops **cur;
967 /* Check magic number. If wrong, it probably means someone changed
968 the struct definition, but not all the places that initialize one. */
969 if (t->to_magic != OPS_MAGIC)
971 fprintf_unfiltered (gdb_stderr,
972 "Magic number of %s target struct wrong\n",
974 internal_error (__FILE__, __LINE__,
975 _("failed internal consistency check"));
978 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
985 /* Using the objfile specified in OBJFILE, find the address for the
986 current thread's thread-local storage with offset OFFSET. */
988 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
990 volatile CORE_ADDR addr = 0;
991 struct target_ops *target;
993 for (target = current_target.beneath;
995 target = target->beneath)
997 if (target->to_get_thread_local_address != NULL)
1002 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
1004 ptid_t ptid = inferior_ptid;
1005 volatile struct gdb_exception ex;
1007 TRY_CATCH (ex, RETURN_MASK_ALL)
1011 /* Fetch the load module address for this objfile. */
1012 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
1014 /* If it's 0, throw the appropriate exception. */
1016 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1017 _("TLS load module not found"));
1019 addr = target->to_get_thread_local_address (target, ptid,
1022 /* If an error occurred, print TLS related messages here. Otherwise,
1023 throw the error to some higher catcher. */
1026 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1030 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1031 error (_("Cannot find thread-local variables "
1032 "in this thread library."));
1034 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1035 if (objfile_is_library)
1036 error (_("Cannot find shared library `%s' in dynamic"
1037 " linker's load module list"), objfile_name (objfile));
1039 error (_("Cannot find executable file `%s' in dynamic"
1040 " linker's load module list"), objfile_name (objfile));
1042 case TLS_NOT_ALLOCATED_YET_ERROR:
1043 if (objfile_is_library)
1044 error (_("The inferior has not yet allocated storage for"
1045 " thread-local variables in\n"
1046 "the shared library `%s'\n"
1048 objfile_name (objfile), target_pid_to_str (ptid));
1050 error (_("The inferior has not yet allocated storage for"
1051 " thread-local variables in\n"
1052 "the executable `%s'\n"
1054 objfile_name (objfile), target_pid_to_str (ptid));
1056 case TLS_GENERIC_ERROR:
1057 if (objfile_is_library)
1058 error (_("Cannot find thread-local storage for %s, "
1059 "shared library %s:\n%s"),
1060 target_pid_to_str (ptid),
1061 objfile_name (objfile), ex.message);
1063 error (_("Cannot find thread-local storage for %s, "
1064 "executable file %s:\n%s"),
1065 target_pid_to_str (ptid),
1066 objfile_name (objfile), ex.message);
1069 throw_exception (ex);
1074 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1075 TLS is an ABI-specific thing. But we don't do that yet. */
1077 error (_("Cannot find thread-local variables on this target"));
1083 target_xfer_status_to_string (enum target_xfer_status err)
1085 #define CASE(X) case X: return #X
1088 CASE(TARGET_XFER_E_IO);
1089 CASE(TARGET_XFER_E_UNAVAILABLE);
1098 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1100 /* target_read_string -- read a null terminated string, up to LEN bytes,
1101 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1102 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1103 is responsible for freeing it. Return the number of bytes successfully
1107 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1109 int tlen, offset, i;
1113 int buffer_allocated;
1115 unsigned int nbytes_read = 0;
1117 gdb_assert (string);
1119 /* Small for testing. */
1120 buffer_allocated = 4;
1121 buffer = xmalloc (buffer_allocated);
1126 tlen = MIN (len, 4 - (memaddr & 3));
1127 offset = memaddr & 3;
1129 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1132 /* The transfer request might have crossed the boundary to an
1133 unallocated region of memory. Retry the transfer, requesting
1137 errcode = target_read_memory (memaddr, buf, 1);
1142 if (bufptr - buffer + tlen > buffer_allocated)
1146 bytes = bufptr - buffer;
1147 buffer_allocated *= 2;
1148 buffer = xrealloc (buffer, buffer_allocated);
1149 bufptr = buffer + bytes;
1152 for (i = 0; i < tlen; i++)
1154 *bufptr++ = buf[i + offset];
1155 if (buf[i + offset] == '\000')
1157 nbytes_read += i + 1;
1164 nbytes_read += tlen;
1173 struct target_section_table *
1174 target_get_section_table (struct target_ops *target)
1176 struct target_ops *t;
1179 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1181 for (t = target; t != NULL; t = t->beneath)
1182 if (t->to_get_section_table != NULL)
1183 return (*t->to_get_section_table) (t);
1188 /* Find a section containing ADDR. */
1190 struct target_section *
1191 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1193 struct target_section_table *table = target_get_section_table (target);
1194 struct target_section *secp;
1199 for (secp = table->sections; secp < table->sections_end; secp++)
1201 if (addr >= secp->addr && addr < secp->endaddr)
1207 /* Read memory from the live target, even if currently inspecting a
1208 traceframe. The return is the same as that of target_read. */
1210 static enum target_xfer_status
1211 target_read_live_memory (enum target_object object,
1212 ULONGEST memaddr, gdb_byte *myaddr, ULONGEST len,
1213 ULONGEST *xfered_len)
1215 enum target_xfer_status ret;
1216 struct cleanup *cleanup;
1218 /* Switch momentarily out of tfind mode so to access live memory.
1219 Note that this must not clear global state, such as the frame
1220 cache, which must still remain valid for the previous traceframe.
1221 We may be _building_ the frame cache at this point. */
1222 cleanup = make_cleanup_restore_traceframe_number ();
1223 set_traceframe_number (-1);
1225 ret = target_xfer_partial (current_target.beneath, object, NULL,
1226 myaddr, NULL, memaddr, len, xfered_len);
1228 do_cleanups (cleanup);
1232 /* Using the set of read-only target sections of OPS, read live
1233 read-only memory. Note that the actual reads start from the
1234 top-most target again.
1236 For interface/parameters/return description see target.h,
1239 static enum target_xfer_status
1240 memory_xfer_live_readonly_partial (struct target_ops *ops,
1241 enum target_object object,
1242 gdb_byte *readbuf, ULONGEST memaddr,
1243 ULONGEST len, ULONGEST *xfered_len)
1245 struct target_section *secp;
1246 struct target_section_table *table;
1248 secp = target_section_by_addr (ops, memaddr);
1250 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1251 secp->the_bfd_section)
1254 struct target_section *p;
1255 ULONGEST memend = memaddr + len;
1257 table = target_get_section_table (ops);
1259 for (p = table->sections; p < table->sections_end; p++)
1261 if (memaddr >= p->addr)
1263 if (memend <= p->endaddr)
1265 /* Entire transfer is within this section. */
1266 return target_read_live_memory (object, memaddr,
1267 readbuf, len, xfered_len);
1269 else if (memaddr >= p->endaddr)
1271 /* This section ends before the transfer starts. */
1276 /* This section overlaps the transfer. Just do half. */
1277 len = p->endaddr - memaddr;
1278 return target_read_live_memory (object, memaddr,
1279 readbuf, len, xfered_len);
1285 return TARGET_XFER_EOF;
1288 /* Read memory from more than one valid target. A core file, for
1289 instance, could have some of memory but delegate other bits to
1290 the target below it. So, we must manually try all targets. */
1292 static enum target_xfer_status
1293 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1294 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1295 ULONGEST *xfered_len)
1297 enum target_xfer_status res;
1301 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1302 readbuf, writebuf, memaddr, len,
1304 if (res == TARGET_XFER_OK)
1307 /* Stop if the target reports that the memory is not available. */
1308 if (res == TARGET_XFER_E_UNAVAILABLE)
1311 /* We want to continue past core files to executables, but not
1312 past a running target's memory. */
1313 if (ops->to_has_all_memory (ops))
1318 while (ops != NULL);
1323 /* Perform a partial memory transfer.
1324 For docs see target.h, to_xfer_partial. */
1326 static enum target_xfer_status
1327 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1328 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1329 ULONGEST len, ULONGEST *xfered_len)
1331 enum target_xfer_status res;
1333 struct mem_region *region;
1334 struct inferior *inf;
1336 /* For accesses to unmapped overlay sections, read directly from
1337 files. Must do this first, as MEMADDR may need adjustment. */
1338 if (readbuf != NULL && overlay_debugging)
1340 struct obj_section *section = find_pc_overlay (memaddr);
1342 if (pc_in_unmapped_range (memaddr, section))
1344 struct target_section_table *table
1345 = target_get_section_table (ops);
1346 const char *section_name = section->the_bfd_section->name;
1348 memaddr = overlay_mapped_address (memaddr, section);
1349 return section_table_xfer_memory_partial (readbuf, writebuf,
1350 memaddr, len, xfered_len,
1352 table->sections_end,
1357 /* Try the executable files, if "trust-readonly-sections" is set. */
1358 if (readbuf != NULL && trust_readonly)
1360 struct target_section *secp;
1361 struct target_section_table *table;
1363 secp = target_section_by_addr (ops, memaddr);
1365 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1366 secp->the_bfd_section)
1369 table = target_get_section_table (ops);
1370 return section_table_xfer_memory_partial (readbuf, writebuf,
1371 memaddr, len, xfered_len,
1373 table->sections_end,
1378 /* If reading unavailable memory in the context of traceframes, and
1379 this address falls within a read-only section, fallback to
1380 reading from live memory. */
1381 if (readbuf != NULL && get_traceframe_number () != -1)
1383 VEC(mem_range_s) *available;
1385 /* If we fail to get the set of available memory, then the
1386 target does not support querying traceframe info, and so we
1387 attempt reading from the traceframe anyway (assuming the
1388 target implements the old QTro packet then). */
1389 if (traceframe_available_memory (&available, memaddr, len))
1391 struct cleanup *old_chain;
1393 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1395 if (VEC_empty (mem_range_s, available)
1396 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1398 /* Don't read into the traceframe's available
1400 if (!VEC_empty (mem_range_s, available))
1402 LONGEST oldlen = len;
1404 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1405 gdb_assert (len <= oldlen);
1408 do_cleanups (old_chain);
1410 /* This goes through the topmost target again. */
1411 res = memory_xfer_live_readonly_partial (ops, object,
1414 if (res == TARGET_XFER_OK)
1415 return TARGET_XFER_OK;
1418 /* No use trying further, we know some memory starting
1419 at MEMADDR isn't available. */
1421 return TARGET_XFER_E_UNAVAILABLE;
1425 /* Don't try to read more than how much is available, in
1426 case the target implements the deprecated QTro packet to
1427 cater for older GDBs (the target's knowledge of read-only
1428 sections may be outdated by now). */
1429 len = VEC_index (mem_range_s, available, 0)->length;
1431 do_cleanups (old_chain);
1435 /* Try GDB's internal data cache. */
1436 region = lookup_mem_region (memaddr);
1437 /* region->hi == 0 means there's no upper bound. */
1438 if (memaddr + len < region->hi || region->hi == 0)
1441 reg_len = region->hi - memaddr;
1443 switch (region->attrib.mode)
1446 if (writebuf != NULL)
1447 return TARGET_XFER_E_IO;
1451 if (readbuf != NULL)
1452 return TARGET_XFER_E_IO;
1456 /* We only support writing to flash during "load" for now. */
1457 if (writebuf != NULL)
1458 error (_("Writing to flash memory forbidden in this context"));
1462 return TARGET_XFER_E_IO;
1465 if (!ptid_equal (inferior_ptid, null_ptid))
1466 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1471 /* The dcache reads whole cache lines; that doesn't play well
1472 with reading from a trace buffer, because reading outside of
1473 the collected memory range fails. */
1474 && get_traceframe_number () == -1
1475 && (region->attrib.cache
1476 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1477 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1479 DCACHE *dcache = target_dcache_get_or_init ();
1482 if (readbuf != NULL)
1483 l = dcache_xfer_memory (ops, dcache, memaddr, readbuf, reg_len, 0);
1485 /* FIXME drow/2006-08-09: If we're going to preserve const
1486 correctness dcache_xfer_memory should take readbuf and
1488 l = dcache_xfer_memory (ops, dcache, memaddr, (void *) writebuf,
1491 return TARGET_XFER_E_IO;
1494 *xfered_len = (ULONGEST) l;
1495 return TARGET_XFER_OK;
1499 /* If none of those methods found the memory we wanted, fall back
1500 to a target partial transfer. Normally a single call to
1501 to_xfer_partial is enough; if it doesn't recognize an object
1502 it will call the to_xfer_partial of the next target down.
1503 But for memory this won't do. Memory is the only target
1504 object which can be read from more than one valid target.
1505 A core file, for instance, could have some of memory but
1506 delegate other bits to the target below it. So, we must
1507 manually try all targets. */
1509 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1512 /* Make sure the cache gets updated no matter what - if we are writing
1513 to the stack. Even if this write is not tagged as such, we still need
1514 to update the cache. */
1516 if (res == TARGET_XFER_OK
1519 && target_dcache_init_p ()
1520 && !region->attrib.cache
1521 && ((stack_cache_enabled_p () && object != TARGET_OBJECT_STACK_MEMORY)
1522 || (code_cache_enabled_p () && object != TARGET_OBJECT_CODE_MEMORY)))
1524 DCACHE *dcache = target_dcache_get ();
1526 dcache_update (dcache, memaddr, (void *) writebuf, reg_len);
1529 /* If we still haven't got anything, return the last error. We
1534 /* Perform a partial memory transfer. For docs see target.h,
1537 static enum target_xfer_status
1538 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1539 gdb_byte *readbuf, const gdb_byte *writebuf,
1540 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1542 enum target_xfer_status res;
1544 /* Zero length requests are ok and require no work. */
1546 return TARGET_XFER_EOF;
1548 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1549 breakpoint insns, thus hiding out from higher layers whether
1550 there are software breakpoints inserted in the code stream. */
1551 if (readbuf != NULL)
1553 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1556 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1557 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, res);
1562 struct cleanup *old_chain;
1564 /* A large write request is likely to be partially satisfied
1565 by memory_xfer_partial_1. We will continually malloc
1566 and free a copy of the entire write request for breakpoint
1567 shadow handling even though we only end up writing a small
1568 subset of it. Cap writes to 4KB to mitigate this. */
1569 len = min (4096, len);
1571 buf = xmalloc (len);
1572 old_chain = make_cleanup (xfree, buf);
1573 memcpy (buf, writebuf, len);
1575 breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len);
1576 res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len,
1579 do_cleanups (old_chain);
1586 restore_show_memory_breakpoints (void *arg)
1588 show_memory_breakpoints = (uintptr_t) arg;
1592 make_show_memory_breakpoints_cleanup (int show)
1594 int current = show_memory_breakpoints;
1596 show_memory_breakpoints = show;
1597 return make_cleanup (restore_show_memory_breakpoints,
1598 (void *) (uintptr_t) current);
1601 /* For docs see target.h, to_xfer_partial. */
1603 enum target_xfer_status
1604 target_xfer_partial (struct target_ops *ops,
1605 enum target_object object, const char *annex,
1606 gdb_byte *readbuf, const gdb_byte *writebuf,
1607 ULONGEST offset, ULONGEST len,
1608 ULONGEST *xfered_len)
1610 enum target_xfer_status retval;
1612 gdb_assert (ops->to_xfer_partial != NULL);
1614 /* Transfer is done when LEN is zero. */
1616 return TARGET_XFER_EOF;
1618 if (writebuf && !may_write_memory)
1619 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1620 core_addr_to_string_nz (offset), plongest (len));
1624 /* If this is a memory transfer, let the memory-specific code
1625 have a look at it instead. Memory transfers are more
1627 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1628 || object == TARGET_OBJECT_CODE_MEMORY)
1629 retval = memory_xfer_partial (ops, object, readbuf,
1630 writebuf, offset, len, xfered_len);
1631 else if (object == TARGET_OBJECT_RAW_MEMORY)
1633 /* Request the normal memory object from other layers. */
1634 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1638 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1639 writebuf, offset, len, xfered_len);
1643 const unsigned char *myaddr = NULL;
1645 fprintf_unfiltered (gdb_stdlog,
1646 "%s:target_xfer_partial "
1647 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1650 (annex ? annex : "(null)"),
1651 host_address_to_string (readbuf),
1652 host_address_to_string (writebuf),
1653 core_addr_to_string_nz (offset),
1654 pulongest (len), retval,
1655 pulongest (*xfered_len));
1661 if (retval == TARGET_XFER_OK && myaddr != NULL)
1665 fputs_unfiltered (", bytes =", gdb_stdlog);
1666 for (i = 0; i < *xfered_len; i++)
1668 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1670 if (targetdebug < 2 && i > 0)
1672 fprintf_unfiltered (gdb_stdlog, " ...");
1675 fprintf_unfiltered (gdb_stdlog, "\n");
1678 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1682 fputc_unfiltered ('\n', gdb_stdlog);
1685 /* Check implementations of to_xfer_partial update *XFERED_LEN
1686 properly. Do assertion after printing debug messages, so that we
1687 can find more clues on assertion failure from debugging messages. */
1688 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_E_UNAVAILABLE)
1689 gdb_assert (*xfered_len > 0);
1694 /* Read LEN bytes of target memory at address MEMADDR, placing the
1695 results in GDB's memory at MYADDR. Returns either 0 for success or
1696 TARGET_XFER_E_IO if any error occurs.
1698 If an error occurs, no guarantee is made about the contents of the data at
1699 MYADDR. In particular, the caller should not depend upon partial reads
1700 filling the buffer with good data. There is no way for the caller to know
1701 how much good data might have been transfered anyway. Callers that can
1702 deal with partial reads should call target_read (which will retry until
1703 it makes no progress, and then return how much was transferred). */
1706 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1708 /* Dispatch to the topmost target, not the flattened current_target.
1709 Memory accesses check target->to_has_(all_)memory, and the
1710 flattened target doesn't inherit those. */
1711 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1712 myaddr, memaddr, len) == len)
1715 return TARGET_XFER_E_IO;
1718 /* Like target_read_memory, but specify explicitly that this is a read
1719 from the target's raw memory. That is, this read bypasses the
1720 dcache, breakpoint shadowing, etc. */
1723 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1725 /* See comment in target_read_memory about why the request starts at
1726 current_target.beneath. */
1727 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1728 myaddr, memaddr, len) == len)
1731 return TARGET_XFER_E_IO;
1734 /* Like target_read_memory, but specify explicitly that this is a read from
1735 the target's stack. This may trigger different cache behavior. */
1738 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1740 /* See comment in target_read_memory about why the request starts at
1741 current_target.beneath. */
1742 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1743 myaddr, memaddr, len) == len)
1746 return TARGET_XFER_E_IO;
1749 /* Like target_read_memory, but specify explicitly that this is a read from
1750 the target's code. This may trigger different cache behavior. */
1753 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1755 /* See comment in target_read_memory about why the request starts at
1756 current_target.beneath. */
1757 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1758 myaddr, memaddr, len) == len)
1761 return TARGET_XFER_E_IO;
1764 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1765 Returns either 0 for success or TARGET_XFER_E_IO if any
1766 error occurs. If an error occurs, no guarantee is made about how
1767 much data got written. Callers that can deal with partial writes
1768 should call target_write. */
1771 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1773 /* See comment in target_read_memory about why the request starts at
1774 current_target.beneath. */
1775 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1776 myaddr, memaddr, len) == len)
1779 return TARGET_XFER_E_IO;
1782 /* Write LEN bytes from MYADDR to target raw memory at address
1783 MEMADDR. Returns either 0 for success or TARGET_XFER_E_IO
1784 if any error occurs. If an error occurs, no guarantee is made
1785 about how much data got written. Callers that can deal with
1786 partial writes should call target_write. */
1789 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1791 /* See comment in target_read_memory about why the request starts at
1792 current_target.beneath. */
1793 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1794 myaddr, memaddr, len) == len)
1797 return TARGET_XFER_E_IO;
1800 /* Fetch the target's memory map. */
1803 target_memory_map (void)
1805 VEC(mem_region_s) *result;
1806 struct mem_region *last_one, *this_one;
1808 struct target_ops *t;
1811 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1813 for (t = current_target.beneath; t != NULL; t = t->beneath)
1814 if (t->to_memory_map != NULL)
1820 result = t->to_memory_map (t);
1824 qsort (VEC_address (mem_region_s, result),
1825 VEC_length (mem_region_s, result),
1826 sizeof (struct mem_region), mem_region_cmp);
1828 /* Check that regions do not overlap. Simultaneously assign
1829 a numbering for the "mem" commands to use to refer to
1832 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1834 this_one->number = ix;
1836 if (last_one && last_one->hi > this_one->lo)
1838 warning (_("Overlapping regions in memory map: ignoring"));
1839 VEC_free (mem_region_s, result);
1842 last_one = this_one;
1849 target_flash_erase (ULONGEST address, LONGEST length)
1851 struct target_ops *t;
1853 for (t = current_target.beneath; t != NULL; t = t->beneath)
1854 if (t->to_flash_erase != NULL)
1857 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1858 hex_string (address), phex (length, 0));
1859 t->to_flash_erase (t, address, length);
1867 target_flash_done (void)
1869 struct target_ops *t;
1871 for (t = current_target.beneath; t != NULL; t = t->beneath)
1872 if (t->to_flash_done != NULL)
1875 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1876 t->to_flash_done (t);
1884 show_trust_readonly (struct ui_file *file, int from_tty,
1885 struct cmd_list_element *c, const char *value)
1887 fprintf_filtered (file,
1888 _("Mode for reading from readonly sections is %s.\n"),
1892 /* More generic transfers. */
1894 static enum target_xfer_status
1895 default_xfer_partial (struct target_ops *ops, enum target_object object,
1896 const char *annex, gdb_byte *readbuf,
1897 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
1898 ULONGEST *xfered_len)
1900 if (object == TARGET_OBJECT_MEMORY
1901 && ops->deprecated_xfer_memory != NULL)
1902 /* If available, fall back to the target's
1903 "deprecated_xfer_memory" method. */
1908 if (writebuf != NULL)
1910 void *buffer = xmalloc (len);
1911 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1913 memcpy (buffer, writebuf, len);
1914 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1915 1/*write*/, NULL, ops);
1916 do_cleanups (cleanup);
1918 if (readbuf != NULL)
1919 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1920 0/*read*/, NULL, ops);
1923 *xfered_len = (ULONGEST) xfered;
1924 return TARGET_XFER_E_IO;
1926 else if (xfered == 0 && errno == 0)
1927 /* "deprecated_xfer_memory" uses 0, cross checked against
1928 ERRNO as one indication of an error. */
1929 return TARGET_XFER_EOF;
1931 return TARGET_XFER_E_IO;
1935 gdb_assert (ops->beneath != NULL);
1936 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1937 readbuf, writebuf, offset, len,
1942 /* Target vector read/write partial wrapper functions. */
1944 static enum target_xfer_status
1945 target_read_partial (struct target_ops *ops,
1946 enum target_object object,
1947 const char *annex, gdb_byte *buf,
1948 ULONGEST offset, ULONGEST len,
1949 ULONGEST *xfered_len)
1951 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1955 static enum target_xfer_status
1956 target_write_partial (struct target_ops *ops,
1957 enum target_object object,
1958 const char *annex, const gdb_byte *buf,
1959 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1961 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1965 /* Wrappers to perform the full transfer. */
1967 /* For docs on target_read see target.h. */
1970 target_read (struct target_ops *ops,
1971 enum target_object object,
1972 const char *annex, gdb_byte *buf,
1973 ULONGEST offset, LONGEST len)
1977 while (xfered < len)
1979 ULONGEST xfered_len;
1980 enum target_xfer_status status;
1982 status = target_read_partial (ops, object, annex,
1983 (gdb_byte *) buf + xfered,
1984 offset + xfered, len - xfered,
1987 /* Call an observer, notifying them of the xfer progress? */
1988 if (status == TARGET_XFER_EOF)
1990 else if (status == TARGET_XFER_OK)
1992 xfered += xfered_len;
2002 /* Assuming that the entire [begin, end) range of memory cannot be
2003 read, try to read whatever subrange is possible to read.
2005 The function returns, in RESULT, either zero or one memory block.
2006 If there's a readable subrange at the beginning, it is completely
2007 read and returned. Any further readable subrange will not be read.
2008 Otherwise, if there's a readable subrange at the end, it will be
2009 completely read and returned. Any readable subranges before it
2010 (obviously, not starting at the beginning), will be ignored. In
2011 other cases -- either no readable subrange, or readable subrange(s)
2012 that is neither at the beginning, or end, nothing is returned.
2014 The purpose of this function is to handle a read across a boundary
2015 of accessible memory in a case when memory map is not available.
2016 The above restrictions are fine for this case, but will give
2017 incorrect results if the memory is 'patchy'. However, supporting
2018 'patchy' memory would require trying to read every single byte,
2019 and it seems unacceptable solution. Explicit memory map is
2020 recommended for this case -- and target_read_memory_robust will
2021 take care of reading multiple ranges then. */
2024 read_whatever_is_readable (struct target_ops *ops,
2025 ULONGEST begin, ULONGEST end,
2026 VEC(memory_read_result_s) **result)
2028 gdb_byte *buf = xmalloc (end - begin);
2029 ULONGEST current_begin = begin;
2030 ULONGEST current_end = end;
2032 memory_read_result_s r;
2033 ULONGEST xfered_len;
2035 /* If we previously failed to read 1 byte, nothing can be done here. */
2036 if (end - begin <= 1)
2042 /* Check that either first or the last byte is readable, and give up
2043 if not. This heuristic is meant to permit reading accessible memory
2044 at the boundary of accessible region. */
2045 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2046 buf, begin, 1, &xfered_len) == TARGET_XFER_OK)
2051 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
2052 buf + (end-begin) - 1, end - 1, 1,
2053 &xfered_len) == TARGET_XFER_OK)
2064 /* Loop invariant is that the [current_begin, current_end) was previously
2065 found to be not readable as a whole.
2067 Note loop condition -- if the range has 1 byte, we can't divide the range
2068 so there's no point trying further. */
2069 while (current_end - current_begin > 1)
2071 ULONGEST first_half_begin, first_half_end;
2072 ULONGEST second_half_begin, second_half_end;
2074 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2078 first_half_begin = current_begin;
2079 first_half_end = middle;
2080 second_half_begin = middle;
2081 second_half_end = current_end;
2085 first_half_begin = middle;
2086 first_half_end = current_end;
2087 second_half_begin = current_begin;
2088 second_half_end = middle;
2091 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2092 buf + (first_half_begin - begin),
2094 first_half_end - first_half_begin);
2096 if (xfer == first_half_end - first_half_begin)
2098 /* This half reads up fine. So, the error must be in the
2100 current_begin = second_half_begin;
2101 current_end = second_half_end;
2105 /* This half is not readable. Because we've tried one byte, we
2106 know some part of this half if actually redable. Go to the next
2107 iteration to divide again and try to read.
2109 We don't handle the other half, because this function only tries
2110 to read a single readable subrange. */
2111 current_begin = first_half_begin;
2112 current_end = first_half_end;
2118 /* The [begin, current_begin) range has been read. */
2120 r.end = current_begin;
2125 /* The [current_end, end) range has been read. */
2126 LONGEST rlen = end - current_end;
2128 r.data = xmalloc (rlen);
2129 memcpy (r.data, buf + current_end - begin, rlen);
2130 r.begin = current_end;
2134 VEC_safe_push(memory_read_result_s, (*result), &r);
2138 free_memory_read_result_vector (void *x)
2140 VEC(memory_read_result_s) *v = x;
2141 memory_read_result_s *current;
2144 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2146 xfree (current->data);
2148 VEC_free (memory_read_result_s, v);
2151 VEC(memory_read_result_s) *
2152 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2154 VEC(memory_read_result_s) *result = 0;
2157 while (xfered < len)
2159 struct mem_region *region = lookup_mem_region (offset + xfered);
2162 /* If there is no explicit region, a fake one should be created. */
2163 gdb_assert (region);
2165 if (region->hi == 0)
2166 rlen = len - xfered;
2168 rlen = region->hi - offset;
2170 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2172 /* Cannot read this region. Note that we can end up here only
2173 if the region is explicitly marked inaccessible, or
2174 'inaccessible-by-default' is in effect. */
2179 LONGEST to_read = min (len - xfered, rlen);
2180 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2182 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2183 (gdb_byte *) buffer,
2184 offset + xfered, to_read);
2185 /* Call an observer, notifying them of the xfer progress? */
2188 /* Got an error reading full chunk. See if maybe we can read
2191 read_whatever_is_readable (ops, offset + xfered,
2192 offset + xfered + to_read, &result);
2197 struct memory_read_result r;
2199 r.begin = offset + xfered;
2200 r.end = r.begin + xfer;
2201 VEC_safe_push (memory_read_result_s, result, &r);
2211 /* An alternative to target_write with progress callbacks. */
2214 target_write_with_progress (struct target_ops *ops,
2215 enum target_object object,
2216 const char *annex, const gdb_byte *buf,
2217 ULONGEST offset, LONGEST len,
2218 void (*progress) (ULONGEST, void *), void *baton)
2222 /* Give the progress callback a chance to set up. */
2224 (*progress) (0, baton);
2226 while (xfered < len)
2228 ULONGEST xfered_len;
2229 enum target_xfer_status status;
2231 status = target_write_partial (ops, object, annex,
2232 (gdb_byte *) buf + xfered,
2233 offset + xfered, len - xfered,
2236 if (status == TARGET_XFER_EOF)
2238 if (TARGET_XFER_STATUS_ERROR_P (status))
2241 gdb_assert (status == TARGET_XFER_OK);
2243 (*progress) (xfered_len, baton);
2245 xfered += xfered_len;
2251 /* For docs on target_write see target.h. */
2254 target_write (struct target_ops *ops,
2255 enum target_object object,
2256 const char *annex, const gdb_byte *buf,
2257 ULONGEST offset, LONGEST len)
2259 return target_write_with_progress (ops, object, annex, buf, offset, len,
2263 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2264 the size of the transferred data. PADDING additional bytes are
2265 available in *BUF_P. This is a helper function for
2266 target_read_alloc; see the declaration of that function for more
2270 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2271 const char *annex, gdb_byte **buf_p, int padding)
2273 size_t buf_alloc, buf_pos;
2276 /* This function does not have a length parameter; it reads the
2277 entire OBJECT). Also, it doesn't support objects fetched partly
2278 from one target and partly from another (in a different stratum,
2279 e.g. a core file and an executable). Both reasons make it
2280 unsuitable for reading memory. */
2281 gdb_assert (object != TARGET_OBJECT_MEMORY);
2283 /* Start by reading up to 4K at a time. The target will throttle
2284 this number down if necessary. */
2286 buf = xmalloc (buf_alloc);
2290 ULONGEST xfered_len;
2291 enum target_xfer_status status;
2293 status = target_read_partial (ops, object, annex, &buf[buf_pos],
2294 buf_pos, buf_alloc - buf_pos - padding,
2297 if (status == TARGET_XFER_EOF)
2299 /* Read all there was. */
2306 else if (status != TARGET_XFER_OK)
2308 /* An error occurred. */
2310 return TARGET_XFER_E_IO;
2313 buf_pos += xfered_len;
2315 /* If the buffer is filling up, expand it. */
2316 if (buf_alloc < buf_pos * 2)
2319 buf = xrealloc (buf, buf_alloc);
2326 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2327 the size of the transferred data. See the declaration in "target.h"
2328 function for more information about the return value. */
2331 target_read_alloc (struct target_ops *ops, enum target_object object,
2332 const char *annex, gdb_byte **buf_p)
2334 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2337 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2338 returned as a string, allocated using xmalloc. If an error occurs
2339 or the transfer is unsupported, NULL is returned. Empty objects
2340 are returned as allocated but empty strings. A warning is issued
2341 if the result contains any embedded NUL bytes. */
2344 target_read_stralloc (struct target_ops *ops, enum target_object object,
2349 LONGEST i, transferred;
2351 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2352 bufstr = (char *) buffer;
2354 if (transferred < 0)
2357 if (transferred == 0)
2358 return xstrdup ("");
2360 bufstr[transferred] = 0;
2362 /* Check for embedded NUL bytes; but allow trailing NULs. */
2363 for (i = strlen (bufstr); i < transferred; i++)
2366 warning (_("target object %d, annex %s, "
2367 "contained unexpected null characters"),
2368 (int) object, annex ? annex : "(none)");
2375 /* Memory transfer methods. */
2378 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2381 /* This method is used to read from an alternate, non-current
2382 target. This read must bypass the overlay support (as symbols
2383 don't match this target), and GDB's internal cache (wrong cache
2384 for this target). */
2385 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2387 memory_error (TARGET_XFER_E_IO, addr);
2391 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2392 int len, enum bfd_endian byte_order)
2394 gdb_byte buf[sizeof (ULONGEST)];
2396 gdb_assert (len <= sizeof (buf));
2397 get_target_memory (ops, addr, buf, len);
2398 return extract_unsigned_integer (buf, len, byte_order);
2404 target_insert_breakpoint (struct gdbarch *gdbarch,
2405 struct bp_target_info *bp_tgt)
2407 if (!may_insert_breakpoints)
2409 warning (_("May not insert breakpoints"));
2413 return current_target.to_insert_breakpoint (¤t_target,
2420 target_remove_breakpoint (struct gdbarch *gdbarch,
2421 struct bp_target_info *bp_tgt)
2423 /* This is kind of a weird case to handle, but the permission might
2424 have been changed after breakpoints were inserted - in which case
2425 we should just take the user literally and assume that any
2426 breakpoints should be left in place. */
2427 if (!may_insert_breakpoints)
2429 warning (_("May not remove breakpoints"));
2433 return current_target.to_remove_breakpoint (¤t_target,
2438 target_info (char *args, int from_tty)
2440 struct target_ops *t;
2441 int has_all_mem = 0;
2443 if (symfile_objfile != NULL)
2444 printf_unfiltered (_("Symbols from \"%s\".\n"),
2445 objfile_name (symfile_objfile));
2447 for (t = target_stack; t != NULL; t = t->beneath)
2449 if (!(*t->to_has_memory) (t))
2452 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2455 printf_unfiltered (_("\tWhile running this, "
2456 "GDB does not access memory from...\n"));
2457 printf_unfiltered ("%s:\n", t->to_longname);
2458 (t->to_files_info) (t);
2459 has_all_mem = (*t->to_has_all_memory) (t);
2463 /* This function is called before any new inferior is created, e.g.
2464 by running a program, attaching, or connecting to a target.
2465 It cleans up any state from previous invocations which might
2466 change between runs. This is a subset of what target_preopen
2467 resets (things which might change between targets). */
2470 target_pre_inferior (int from_tty)
2472 /* Clear out solib state. Otherwise the solib state of the previous
2473 inferior might have survived and is entirely wrong for the new
2474 target. This has been observed on GNU/Linux using glibc 2.3. How
2486 Cannot access memory at address 0xdeadbeef
2489 /* In some OSs, the shared library list is the same/global/shared
2490 across inferiors. If code is shared between processes, so are
2491 memory regions and features. */
2492 if (!gdbarch_has_global_solist (target_gdbarch ()))
2494 no_shared_libraries (NULL, from_tty);
2496 invalidate_target_mem_regions ();
2498 target_clear_description ();
2501 agent_capability_invalidate ();
2504 /* Callback for iterate_over_inferiors. Gets rid of the given
2508 dispose_inferior (struct inferior *inf, void *args)
2510 struct thread_info *thread;
2512 thread = any_thread_of_process (inf->pid);
2515 switch_to_thread (thread->ptid);
2517 /* Core inferiors actually should be detached, not killed. */
2518 if (target_has_execution)
2521 target_detach (NULL, 0);
2527 /* This is to be called by the open routine before it does
2531 target_preopen (int from_tty)
2535 if (have_inferiors ())
2538 || !have_live_inferiors ()
2539 || query (_("A program is being debugged already. Kill it? ")))
2540 iterate_over_inferiors (dispose_inferior, NULL);
2542 error (_("Program not killed."));
2545 /* Calling target_kill may remove the target from the stack. But if
2546 it doesn't (which seems like a win for UDI), remove it now. */
2547 /* Leave the exec target, though. The user may be switching from a
2548 live process to a core of the same program. */
2549 pop_all_targets_above (file_stratum);
2551 target_pre_inferior (from_tty);
2554 /* Detach a target after doing deferred register stores. */
2557 target_detach (const char *args, int from_tty)
2559 struct target_ops* t;
2561 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2562 /* Don't remove global breakpoints here. They're removed on
2563 disconnection from the target. */
2566 /* If we're in breakpoints-always-inserted mode, have to remove
2567 them before detaching. */
2568 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2570 prepare_for_detach ();
2572 current_target.to_detach (¤t_target, args, from_tty);
2574 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2579 target_disconnect (char *args, int from_tty)
2581 struct target_ops *t;
2583 /* If we're in breakpoints-always-inserted mode or if breakpoints
2584 are global across processes, we have to remove them before
2586 remove_breakpoints ();
2588 for (t = current_target.beneath; t != NULL; t = t->beneath)
2589 if (t->to_disconnect != NULL)
2592 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2594 t->to_disconnect (t, args, from_tty);
2602 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2604 struct target_ops *t;
2605 ptid_t retval = (current_target.to_wait) (¤t_target, ptid,
2610 char *status_string;
2611 char *options_string;
2613 status_string = target_waitstatus_to_string (status);
2614 options_string = target_options_to_string (options);
2615 fprintf_unfiltered (gdb_stdlog,
2616 "target_wait (%d, status, options={%s})"
2618 ptid_get_pid (ptid), options_string,
2619 ptid_get_pid (retval), status_string);
2620 xfree (status_string);
2621 xfree (options_string);
2628 target_pid_to_str (ptid_t ptid)
2630 struct target_ops *t;
2632 for (t = current_target.beneath; t != NULL; t = t->beneath)
2634 if (t->to_pid_to_str != NULL)
2635 return (*t->to_pid_to_str) (t, ptid);
2638 return normal_pid_to_str (ptid);
2642 target_thread_name (struct thread_info *info)
2644 return current_target.to_thread_name (¤t_target, info);
2648 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2650 struct target_ops *t;
2652 target_dcache_invalidate ();
2654 current_target.to_resume (¤t_target, ptid, step, signal);
2656 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2657 ptid_get_pid (ptid),
2658 step ? "step" : "continue",
2659 gdb_signal_to_name (signal));
2661 registers_changed_ptid (ptid);
2662 set_executing (ptid, 1);
2663 set_running (ptid, 1);
2664 clear_inline_frame_state (ptid);
2668 target_pass_signals (int numsigs, unsigned char *pass_signals)
2670 struct target_ops *t;
2672 for (t = current_target.beneath; t != NULL; t = t->beneath)
2674 if (t->to_pass_signals != NULL)
2680 fprintf_unfiltered (gdb_stdlog, "target_pass_signals (%d, {",
2683 for (i = 0; i < numsigs; i++)
2684 if (pass_signals[i])
2685 fprintf_unfiltered (gdb_stdlog, " %s",
2686 gdb_signal_to_name (i));
2688 fprintf_unfiltered (gdb_stdlog, " })\n");
2691 (*t->to_pass_signals) (t, numsigs, pass_signals);
2698 target_program_signals (int numsigs, unsigned char *program_signals)
2700 struct target_ops *t;
2702 for (t = current_target.beneath; t != NULL; t = t->beneath)
2704 if (t->to_program_signals != NULL)
2710 fprintf_unfiltered (gdb_stdlog, "target_program_signals (%d, {",
2713 for (i = 0; i < numsigs; i++)
2714 if (program_signals[i])
2715 fprintf_unfiltered (gdb_stdlog, " %s",
2716 gdb_signal_to_name (i));
2718 fprintf_unfiltered (gdb_stdlog, " })\n");
2721 (*t->to_program_signals) (t, numsigs, program_signals);
2727 /* Look through the list of possible targets for a target that can
2731 target_follow_fork (int follow_child, int detach_fork)
2733 struct target_ops *t;
2735 for (t = current_target.beneath; t != NULL; t = t->beneath)
2737 if (t->to_follow_fork != NULL)
2739 int retval = t->to_follow_fork (t, follow_child, detach_fork);
2742 fprintf_unfiltered (gdb_stdlog,
2743 "target_follow_fork (%d, %d) = %d\n",
2744 follow_child, detach_fork, retval);
2749 /* Some target returned a fork event, but did not know how to follow it. */
2750 internal_error (__FILE__, __LINE__,
2751 _("could not find a target to follow fork"));
2755 target_mourn_inferior (void)
2757 struct target_ops *t;
2759 for (t = current_target.beneath; t != NULL; t = t->beneath)
2761 if (t->to_mourn_inferior != NULL)
2763 t->to_mourn_inferior (t);
2765 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2767 /* We no longer need to keep handles on any of the object files.
2768 Make sure to release them to avoid unnecessarily locking any
2769 of them while we're not actually debugging. */
2770 bfd_cache_close_all ();
2776 internal_error (__FILE__, __LINE__,
2777 _("could not find a target to follow mourn inferior"));
2780 /* Look for a target which can describe architectural features, starting
2781 from TARGET. If we find one, return its description. */
2783 const struct target_desc *
2784 target_read_description (struct target_ops *target)
2786 struct target_ops *t;
2788 for (t = target; t != NULL; t = t->beneath)
2789 if (t->to_read_description != NULL)
2791 const struct target_desc *tdesc;
2793 tdesc = t->to_read_description (t);
2801 /* The default implementation of to_search_memory.
2802 This implements a basic search of memory, reading target memory and
2803 performing the search here (as opposed to performing the search in on the
2804 target side with, for example, gdbserver). */
2807 simple_search_memory (struct target_ops *ops,
2808 CORE_ADDR start_addr, ULONGEST search_space_len,
2809 const gdb_byte *pattern, ULONGEST pattern_len,
2810 CORE_ADDR *found_addrp)
2812 /* NOTE: also defined in find.c testcase. */
2813 #define SEARCH_CHUNK_SIZE 16000
2814 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2815 /* Buffer to hold memory contents for searching. */
2816 gdb_byte *search_buf;
2817 unsigned search_buf_size;
2818 struct cleanup *old_cleanups;
2820 search_buf_size = chunk_size + pattern_len - 1;
2822 /* No point in trying to allocate a buffer larger than the search space. */
2823 if (search_space_len < search_buf_size)
2824 search_buf_size = search_space_len;
2826 search_buf = malloc (search_buf_size);
2827 if (search_buf == NULL)
2828 error (_("Unable to allocate memory to perform the search."));
2829 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2831 /* Prime the search buffer. */
2833 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2834 search_buf, start_addr, search_buf_size) != search_buf_size)
2836 warning (_("Unable to access %s bytes of target "
2837 "memory at %s, halting search."),
2838 pulongest (search_buf_size), hex_string (start_addr));
2839 do_cleanups (old_cleanups);
2843 /* Perform the search.
2845 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2846 When we've scanned N bytes we copy the trailing bytes to the start and
2847 read in another N bytes. */
2849 while (search_space_len >= pattern_len)
2851 gdb_byte *found_ptr;
2852 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2854 found_ptr = memmem (search_buf, nr_search_bytes,
2855 pattern, pattern_len);
2857 if (found_ptr != NULL)
2859 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2861 *found_addrp = found_addr;
2862 do_cleanups (old_cleanups);
2866 /* Not found in this chunk, skip to next chunk. */
2868 /* Don't let search_space_len wrap here, it's unsigned. */
2869 if (search_space_len >= chunk_size)
2870 search_space_len -= chunk_size;
2872 search_space_len = 0;
2874 if (search_space_len >= pattern_len)
2876 unsigned keep_len = search_buf_size - chunk_size;
2877 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2880 /* Copy the trailing part of the previous iteration to the front
2881 of the buffer for the next iteration. */
2882 gdb_assert (keep_len == pattern_len - 1);
2883 memcpy (search_buf, search_buf + chunk_size, keep_len);
2885 nr_to_read = min (search_space_len - keep_len, chunk_size);
2887 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2888 search_buf + keep_len, read_addr,
2889 nr_to_read) != nr_to_read)
2891 warning (_("Unable to access %s bytes of target "
2892 "memory at %s, halting search."),
2893 plongest (nr_to_read),
2894 hex_string (read_addr));
2895 do_cleanups (old_cleanups);
2899 start_addr += chunk_size;
2905 do_cleanups (old_cleanups);
2909 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2910 sequence of bytes in PATTERN with length PATTERN_LEN.
2912 The result is 1 if found, 0 if not found, and -1 if there was an error
2913 requiring halting of the search (e.g. memory read error).
2914 If the pattern is found the address is recorded in FOUND_ADDRP. */
2917 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2918 const gdb_byte *pattern, ULONGEST pattern_len,
2919 CORE_ADDR *found_addrp)
2921 struct target_ops *t;
2924 /* We don't use INHERIT to set current_target.to_search_memory,
2925 so we have to scan the target stack and handle targetdebug
2929 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2930 hex_string (start_addr));
2932 for (t = current_target.beneath; t != NULL; t = t->beneath)
2933 if (t->to_search_memory != NULL)
2938 found = t->to_search_memory (t, start_addr, search_space_len,
2939 pattern, pattern_len, found_addrp);
2943 /* If a special version of to_search_memory isn't available, use the
2945 found = simple_search_memory (current_target.beneath,
2946 start_addr, search_space_len,
2947 pattern, pattern_len, found_addrp);
2951 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2956 /* Look through the currently pushed targets. If none of them will
2957 be able to restart the currently running process, issue an error
2961 target_require_runnable (void)
2963 struct target_ops *t;
2965 for (t = target_stack; t != NULL; t = t->beneath)
2967 /* If this target knows how to create a new program, then
2968 assume we will still be able to after killing the current
2969 one. Either killing and mourning will not pop T, or else
2970 find_default_run_target will find it again. */
2971 if (t->to_create_inferior != NULL)
2974 /* Do not worry about thread_stratum targets that can not
2975 create inferiors. Assume they will be pushed again if
2976 necessary, and continue to the process_stratum. */
2977 if (t->to_stratum == thread_stratum
2978 || t->to_stratum == arch_stratum)
2981 error (_("The \"%s\" target does not support \"run\". "
2982 "Try \"help target\" or \"continue\"."),
2986 /* This function is only called if the target is running. In that
2987 case there should have been a process_stratum target and it
2988 should either know how to create inferiors, or not... */
2989 internal_error (__FILE__, __LINE__, _("No targets found"));
2992 /* Look through the list of possible targets for a target that can
2993 execute a run or attach command without any other data. This is
2994 used to locate the default process stratum.
2996 If DO_MESG is not NULL, the result is always valid (error() is
2997 called for errors); else, return NULL on error. */
2999 static struct target_ops *
3000 find_default_run_target (char *do_mesg)
3002 struct target_ops **t;
3003 struct target_ops *runable = NULL;
3008 for (t = target_structs; t < target_structs + target_struct_size;
3011 if ((*t)->to_can_run && target_can_run (*t))
3021 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
3030 find_default_attach (struct target_ops *ops, char *args, int from_tty)
3032 struct target_ops *t;
3034 t = find_default_run_target ("attach");
3035 (t->to_attach) (t, args, from_tty);
3040 find_default_create_inferior (struct target_ops *ops,
3041 char *exec_file, char *allargs, char **env,
3044 struct target_ops *t;
3046 t = find_default_run_target ("run");
3047 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
3052 find_default_can_async_p (struct target_ops *ignore)
3054 struct target_ops *t;
3056 /* This may be called before the target is pushed on the stack;
3057 look for the default process stratum. If there's none, gdb isn't
3058 configured with a native debugger, and target remote isn't
3060 t = find_default_run_target (NULL);
3061 if (t && t->to_can_async_p != delegate_can_async_p)
3062 return (t->to_can_async_p) (t);
3067 find_default_is_async_p (struct target_ops *ignore)
3069 struct target_ops *t;
3071 /* This may be called before the target is pushed on the stack;
3072 look for the default process stratum. If there's none, gdb isn't
3073 configured with a native debugger, and target remote isn't
3075 t = find_default_run_target (NULL);
3076 if (t && t->to_is_async_p != delegate_is_async_p)
3077 return (t->to_is_async_p) (t);
3082 find_default_supports_non_stop (struct target_ops *self)
3084 struct target_ops *t;
3086 t = find_default_run_target (NULL);
3087 if (t && t->to_supports_non_stop)
3088 return (t->to_supports_non_stop) (t);
3093 target_supports_non_stop (void)
3095 struct target_ops *t;
3097 for (t = ¤t_target; t != NULL; t = t->beneath)
3098 if (t->to_supports_non_stop)
3099 return t->to_supports_non_stop (t);
3104 /* Implement the "info proc" command. */
3107 target_info_proc (char *args, enum info_proc_what what)
3109 struct target_ops *t;
3111 /* If we're already connected to something that can get us OS
3112 related data, use it. Otherwise, try using the native
3114 if (current_target.to_stratum >= process_stratum)
3115 t = current_target.beneath;
3117 t = find_default_run_target (NULL);
3119 for (; t != NULL; t = t->beneath)
3121 if (t->to_info_proc != NULL)
3123 t->to_info_proc (t, args, what);
3126 fprintf_unfiltered (gdb_stdlog,
3127 "target_info_proc (\"%s\", %d)\n", args, what);
3137 find_default_supports_disable_randomization (struct target_ops *self)
3139 struct target_ops *t;
3141 t = find_default_run_target (NULL);
3142 if (t && t->to_supports_disable_randomization)
3143 return (t->to_supports_disable_randomization) (t);
3148 target_supports_disable_randomization (void)
3150 struct target_ops *t;
3152 for (t = ¤t_target; t != NULL; t = t->beneath)
3153 if (t->to_supports_disable_randomization)
3154 return t->to_supports_disable_randomization (t);
3160 target_get_osdata (const char *type)
3162 struct target_ops *t;
3164 /* If we're already connected to something that can get us OS
3165 related data, use it. Otherwise, try using the native
3167 if (current_target.to_stratum >= process_stratum)
3168 t = current_target.beneath;
3170 t = find_default_run_target ("get OS data");
3175 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
3178 /* Determine the current address space of thread PTID. */
3180 struct address_space *
3181 target_thread_address_space (ptid_t ptid)
3183 struct address_space *aspace;
3184 struct inferior *inf;
3185 struct target_ops *t;
3187 for (t = current_target.beneath; t != NULL; t = t->beneath)
3189 if (t->to_thread_address_space != NULL)
3191 aspace = t->to_thread_address_space (t, ptid);
3192 gdb_assert (aspace);
3195 fprintf_unfiltered (gdb_stdlog,
3196 "target_thread_address_space (%s) = %d\n",
3197 target_pid_to_str (ptid),
3198 address_space_num (aspace));
3203 /* Fall-back to the "main" address space of the inferior. */
3204 inf = find_inferior_pid (ptid_get_pid (ptid));
3206 if (inf == NULL || inf->aspace == NULL)
3207 internal_error (__FILE__, __LINE__,
3208 _("Can't determine the current "
3209 "address space of thread %s\n"),
3210 target_pid_to_str (ptid));
3216 /* Target file operations. */
3218 static struct target_ops *
3219 default_fileio_target (void)
3221 /* If we're already connected to something that can perform
3222 file I/O, use it. Otherwise, try using the native target. */
3223 if (current_target.to_stratum >= process_stratum)
3224 return current_target.beneath;
3226 return find_default_run_target ("file I/O");
3229 /* Open FILENAME on the target, using FLAGS and MODE. Return a
3230 target file descriptor, or -1 if an error occurs (and set
3233 target_fileio_open (const char *filename, int flags, int mode,
3236 struct target_ops *t;
3238 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3240 if (t->to_fileio_open != NULL)
3242 int fd = t->to_fileio_open (t, filename, flags, mode, target_errno);
3245 fprintf_unfiltered (gdb_stdlog,
3246 "target_fileio_open (%s,0x%x,0%o) = %d (%d)\n",
3247 filename, flags, mode,
3248 fd, fd != -1 ? 0 : *target_errno);
3253 *target_errno = FILEIO_ENOSYS;
3257 /* Write up to LEN bytes from WRITE_BUF to FD on the target.
3258 Return the number of bytes written, or -1 if an error occurs
3259 (and set *TARGET_ERRNO). */
3261 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
3262 ULONGEST offset, int *target_errno)
3264 struct target_ops *t;
3266 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3268 if (t->to_fileio_pwrite != NULL)
3270 int ret = t->to_fileio_pwrite (t, fd, write_buf, len, offset,
3274 fprintf_unfiltered (gdb_stdlog,
3275 "target_fileio_pwrite (%d,...,%d,%s) "
3277 fd, len, pulongest (offset),
3278 ret, ret != -1 ? 0 : *target_errno);
3283 *target_errno = FILEIO_ENOSYS;
3287 /* Read up to LEN bytes FD on the target into READ_BUF.
3288 Return the number of bytes read, or -1 if an error occurs
3289 (and set *TARGET_ERRNO). */
3291 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
3292 ULONGEST offset, int *target_errno)
3294 struct target_ops *t;
3296 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3298 if (t->to_fileio_pread != NULL)
3300 int ret = t->to_fileio_pread (t, fd, read_buf, len, offset,
3304 fprintf_unfiltered (gdb_stdlog,
3305 "target_fileio_pread (%d,...,%d,%s) "
3307 fd, len, pulongest (offset),
3308 ret, ret != -1 ? 0 : *target_errno);
3313 *target_errno = FILEIO_ENOSYS;
3317 /* Close FD on the target. Return 0, or -1 if an error occurs
3318 (and set *TARGET_ERRNO). */
3320 target_fileio_close (int fd, int *target_errno)
3322 struct target_ops *t;
3324 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3326 if (t->to_fileio_close != NULL)
3328 int ret = t->to_fileio_close (t, fd, target_errno);
3331 fprintf_unfiltered (gdb_stdlog,
3332 "target_fileio_close (%d) = %d (%d)\n",
3333 fd, ret, ret != -1 ? 0 : *target_errno);
3338 *target_errno = FILEIO_ENOSYS;
3342 /* Unlink FILENAME on the target. Return 0, or -1 if an error
3343 occurs (and set *TARGET_ERRNO). */
3345 target_fileio_unlink (const char *filename, int *target_errno)
3347 struct target_ops *t;
3349 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3351 if (t->to_fileio_unlink != NULL)
3353 int ret = t->to_fileio_unlink (t, filename, target_errno);
3356 fprintf_unfiltered (gdb_stdlog,
3357 "target_fileio_unlink (%s) = %d (%d)\n",
3358 filename, ret, ret != -1 ? 0 : *target_errno);
3363 *target_errno = FILEIO_ENOSYS;
3367 /* Read value of symbolic link FILENAME on the target. Return a
3368 null-terminated string allocated via xmalloc, or NULL if an error
3369 occurs (and set *TARGET_ERRNO). */
3371 target_fileio_readlink (const char *filename, int *target_errno)
3373 struct target_ops *t;
3375 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3377 if (t->to_fileio_readlink != NULL)
3379 char *ret = t->to_fileio_readlink (t, filename, target_errno);
3382 fprintf_unfiltered (gdb_stdlog,
3383 "target_fileio_readlink (%s) = %s (%d)\n",
3384 filename, ret? ret : "(nil)",
3385 ret? 0 : *target_errno);
3390 *target_errno = FILEIO_ENOSYS;
3395 target_fileio_close_cleanup (void *opaque)
3397 int fd = *(int *) opaque;
3400 target_fileio_close (fd, &target_errno);
3403 /* Read target file FILENAME. Store the result in *BUF_P and
3404 return the size of the transferred data. PADDING additional bytes are
3405 available in *BUF_P. This is a helper function for
3406 target_fileio_read_alloc; see the declaration of that function for more
3410 target_fileio_read_alloc_1 (const char *filename,
3411 gdb_byte **buf_p, int padding)
3413 struct cleanup *close_cleanup;
3414 size_t buf_alloc, buf_pos;
3420 fd = target_fileio_open (filename, FILEIO_O_RDONLY, 0700, &target_errno);
3424 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3426 /* Start by reading up to 4K at a time. The target will throttle
3427 this number down if necessary. */
3429 buf = xmalloc (buf_alloc);
3433 n = target_fileio_pread (fd, &buf[buf_pos],
3434 buf_alloc - buf_pos - padding, buf_pos,
3438 /* An error occurred. */
3439 do_cleanups (close_cleanup);
3445 /* Read all there was. */
3446 do_cleanups (close_cleanup);
3456 /* If the buffer is filling up, expand it. */
3457 if (buf_alloc < buf_pos * 2)
3460 buf = xrealloc (buf, buf_alloc);
3467 /* Read target file FILENAME. Store the result in *BUF_P and return
3468 the size of the transferred data. See the declaration in "target.h"
3469 function for more information about the return value. */
3472 target_fileio_read_alloc (const char *filename, gdb_byte **buf_p)
3474 return target_fileio_read_alloc_1 (filename, buf_p, 0);
3477 /* Read target file FILENAME. The result is NUL-terminated and
3478 returned as a string, allocated using xmalloc. If an error occurs
3479 or the transfer is unsupported, NULL is returned. Empty objects
3480 are returned as allocated but empty strings. A warning is issued
3481 if the result contains any embedded NUL bytes. */
3484 target_fileio_read_stralloc (const char *filename)
3488 LONGEST i, transferred;
3490 transferred = target_fileio_read_alloc_1 (filename, &buffer, 1);
3491 bufstr = (char *) buffer;
3493 if (transferred < 0)
3496 if (transferred == 0)
3497 return xstrdup ("");
3499 bufstr[transferred] = 0;
3501 /* Check for embedded NUL bytes; but allow trailing NULs. */
3502 for (i = strlen (bufstr); i < transferred; i++)
3505 warning (_("target file %s "
3506 "contained unexpected null characters"),
3516 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3517 CORE_ADDR addr, int len)
3519 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3523 default_watchpoint_addr_within_range (struct target_ops *target,
3525 CORE_ADDR start, int length)
3527 return addr >= start && addr < start + length;
3530 static struct gdbarch *
3531 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3533 return target_gdbarch ();
3543 return_minus_one (void)
3555 * Find the next target down the stack from the specified target.
3559 find_target_beneath (struct target_ops *t)
3567 find_target_at (enum strata stratum)
3569 struct target_ops *t;
3571 for (t = current_target.beneath; t != NULL; t = t->beneath)
3572 if (t->to_stratum == stratum)
3579 /* The inferior process has died. Long live the inferior! */
3582 generic_mourn_inferior (void)
3586 ptid = inferior_ptid;
3587 inferior_ptid = null_ptid;
3589 /* Mark breakpoints uninserted in case something tries to delete a
3590 breakpoint while we delete the inferior's threads (which would
3591 fail, since the inferior is long gone). */
3592 mark_breakpoints_out ();
3594 if (!ptid_equal (ptid, null_ptid))
3596 int pid = ptid_get_pid (ptid);
3597 exit_inferior (pid);
3600 /* Note this wipes step-resume breakpoints, so needs to be done
3601 after exit_inferior, which ends up referencing the step-resume
3602 breakpoints through clear_thread_inferior_resources. */
3603 breakpoint_init_inferior (inf_exited);
3605 registers_changed ();
3607 reopen_exec_file ();
3608 reinit_frame_cache ();
3610 if (deprecated_detach_hook)
3611 deprecated_detach_hook ();
3614 /* Convert a normal process ID to a string. Returns the string in a
3618 normal_pid_to_str (ptid_t ptid)
3620 static char buf[32];
3622 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3627 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3629 return normal_pid_to_str (ptid);
3632 /* Error-catcher for target_find_memory_regions. */
3634 dummy_find_memory_regions (struct target_ops *self,
3635 find_memory_region_ftype ignore1, void *ignore2)
3637 error (_("Command not implemented for this target."));
3641 /* Error-catcher for target_make_corefile_notes. */
3643 dummy_make_corefile_notes (struct target_ops *self,
3644 bfd *ignore1, int *ignore2)
3646 error (_("Command not implemented for this target."));
3650 /* Set up the handful of non-empty slots needed by the dummy target
3654 init_dummy_target (void)
3656 dummy_target.to_shortname = "None";
3657 dummy_target.to_longname = "None";
3658 dummy_target.to_doc = "";
3659 dummy_target.to_create_inferior = find_default_create_inferior;
3660 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3661 dummy_target.to_supports_disable_randomization
3662 = find_default_supports_disable_randomization;
3663 dummy_target.to_pid_to_str = dummy_pid_to_str;
3664 dummy_target.to_stratum = dummy_stratum;
3665 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3666 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3667 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3668 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3669 dummy_target.to_has_execution
3670 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3671 dummy_target.to_magic = OPS_MAGIC;
3673 install_dummy_methods (&dummy_target);
3677 debug_to_open (char *args, int from_tty)
3679 debug_target.to_open (args, from_tty);
3681 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3685 target_close (struct target_ops *targ)
3687 gdb_assert (!target_is_pushed (targ));
3689 if (targ->to_xclose != NULL)
3690 targ->to_xclose (targ);
3691 else if (targ->to_close != NULL)
3692 targ->to_close (targ);
3695 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3699 target_attach (char *args, int from_tty)
3701 current_target.to_attach (¤t_target, args, from_tty);
3703 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3708 target_thread_alive (ptid_t ptid)
3710 struct target_ops *t;
3712 for (t = current_target.beneath; t != NULL; t = t->beneath)
3714 if (t->to_thread_alive != NULL)
3718 retval = t->to_thread_alive (t, ptid);
3720 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3721 ptid_get_pid (ptid), retval);
3731 target_find_new_threads (void)
3733 struct target_ops *t;
3735 for (t = current_target.beneath; t != NULL; t = t->beneath)
3737 if (t->to_find_new_threads != NULL)
3739 t->to_find_new_threads (t);
3741 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3749 target_stop (ptid_t ptid)
3753 warning (_("May not interrupt or stop the target, ignoring attempt"));
3757 (*current_target.to_stop) (¤t_target, ptid);
3761 debug_to_post_attach (struct target_ops *self, int pid)
3763 debug_target.to_post_attach (&debug_target, pid);
3765 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3768 /* Concatenate ELEM to LIST, a comma separate list, and return the
3769 result. The LIST incoming argument is released. */
3772 str_comma_list_concat_elem (char *list, const char *elem)
3775 return xstrdup (elem);
3777 return reconcat (list, list, ", ", elem, (char *) NULL);
3780 /* Helper for target_options_to_string. If OPT is present in
3781 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3782 Returns the new resulting string. OPT is removed from
3786 do_option (int *target_options, char *ret,
3787 int opt, char *opt_str)
3789 if ((*target_options & opt) != 0)
3791 ret = str_comma_list_concat_elem (ret, opt_str);
3792 *target_options &= ~opt;
3799 target_options_to_string (int target_options)
3803 #define DO_TARG_OPTION(OPT) \
3804 ret = do_option (&target_options, ret, OPT, #OPT)
3806 DO_TARG_OPTION (TARGET_WNOHANG);
3808 if (target_options != 0)
3809 ret = str_comma_list_concat_elem (ret, "unknown???");
3817 debug_print_register (const char * func,
3818 struct regcache *regcache, int regno)
3820 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3822 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3823 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3824 && gdbarch_register_name (gdbarch, regno) != NULL
3825 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3826 fprintf_unfiltered (gdb_stdlog, "(%s)",
3827 gdbarch_register_name (gdbarch, regno));
3829 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3830 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3832 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3833 int i, size = register_size (gdbarch, regno);
3834 gdb_byte buf[MAX_REGISTER_SIZE];
3836 regcache_raw_collect (regcache, regno, buf);
3837 fprintf_unfiltered (gdb_stdlog, " = ");
3838 for (i = 0; i < size; i++)
3840 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3842 if (size <= sizeof (LONGEST))
3844 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3846 fprintf_unfiltered (gdb_stdlog, " %s %s",
3847 core_addr_to_string_nz (val), plongest (val));
3850 fprintf_unfiltered (gdb_stdlog, "\n");
3854 target_fetch_registers (struct regcache *regcache, int regno)
3856 struct target_ops *t;
3858 for (t = current_target.beneath; t != NULL; t = t->beneath)
3860 if (t->to_fetch_registers != NULL)
3862 t->to_fetch_registers (t, regcache, regno);
3864 debug_print_register ("target_fetch_registers", regcache, regno);
3871 target_store_registers (struct regcache *regcache, int regno)
3873 struct target_ops *t;
3875 if (!may_write_registers)
3876 error (_("Writing to registers is not allowed (regno %d)"), regno);
3878 current_target.to_store_registers (¤t_target, regcache, regno);
3881 debug_print_register ("target_store_registers", regcache, regno);
3886 target_core_of_thread (ptid_t ptid)
3888 struct target_ops *t;
3890 for (t = current_target.beneath; t != NULL; t = t->beneath)
3892 if (t->to_core_of_thread != NULL)
3894 int retval = t->to_core_of_thread (t, ptid);
3897 fprintf_unfiltered (gdb_stdlog,
3898 "target_core_of_thread (%d) = %d\n",
3899 ptid_get_pid (ptid), retval);
3908 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3910 struct target_ops *t;
3912 for (t = current_target.beneath; t != NULL; t = t->beneath)
3914 if (t->to_verify_memory != NULL)
3916 int retval = t->to_verify_memory (t, data, memaddr, size);
3919 fprintf_unfiltered (gdb_stdlog,
3920 "target_verify_memory (%s, %s) = %d\n",
3921 paddress (target_gdbarch (), memaddr),
3931 /* The documentation for this function is in its prototype declaration in
3935 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3937 struct target_ops *t;
3939 for (t = current_target.beneath; t != NULL; t = t->beneath)
3940 if (t->to_insert_mask_watchpoint != NULL)
3944 ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
3947 fprintf_unfiltered (gdb_stdlog, "\
3948 target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
3949 core_addr_to_string (addr),
3950 core_addr_to_string (mask), rw, ret);
3958 /* The documentation for this function is in its prototype declaration in
3962 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
3964 struct target_ops *t;
3966 for (t = current_target.beneath; t != NULL; t = t->beneath)
3967 if (t->to_remove_mask_watchpoint != NULL)
3971 ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
3974 fprintf_unfiltered (gdb_stdlog, "\
3975 target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
3976 core_addr_to_string (addr),
3977 core_addr_to_string (mask), rw, ret);
3985 /* The documentation for this function is in its prototype declaration
3989 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3991 struct target_ops *t;
3993 for (t = current_target.beneath; t != NULL; t = t->beneath)
3994 if (t->to_masked_watch_num_registers != NULL)
3995 return t->to_masked_watch_num_registers (t, addr, mask);
4000 /* The documentation for this function is in its prototype declaration
4004 target_ranged_break_num_registers (void)
4006 struct target_ops *t;
4008 for (t = current_target.beneath; t != NULL; t = t->beneath)
4009 if (t->to_ranged_break_num_registers != NULL)
4010 return t->to_ranged_break_num_registers (t);
4017 struct btrace_target_info *
4018 target_enable_btrace (ptid_t ptid)
4020 struct target_ops *t;
4022 for (t = current_target.beneath; t != NULL; t = t->beneath)
4023 if (t->to_enable_btrace != NULL)
4024 return t->to_enable_btrace (t, ptid);
4033 target_disable_btrace (struct btrace_target_info *btinfo)
4035 struct target_ops *t;
4037 for (t = current_target.beneath; t != NULL; t = t->beneath)
4038 if (t->to_disable_btrace != NULL)
4040 t->to_disable_btrace (t, btinfo);
4050 target_teardown_btrace (struct btrace_target_info *btinfo)
4052 struct target_ops *t;
4054 for (t = current_target.beneath; t != NULL; t = t->beneath)
4055 if (t->to_teardown_btrace != NULL)
4057 t->to_teardown_btrace (t, btinfo);
4067 target_read_btrace (VEC (btrace_block_s) **btrace,
4068 struct btrace_target_info *btinfo,
4069 enum btrace_read_type type)
4071 struct target_ops *t;
4073 for (t = current_target.beneath; t != NULL; t = t->beneath)
4074 if (t->to_read_btrace != NULL)
4075 return t->to_read_btrace (t, btrace, btinfo, type);
4078 return BTRACE_ERR_NOT_SUPPORTED;
4084 target_stop_recording (void)
4086 struct target_ops *t;
4088 for (t = current_target.beneath; t != NULL; t = t->beneath)
4089 if (t->to_stop_recording != NULL)
4091 t->to_stop_recording (t);
4095 /* This is optional. */
4101 target_info_record (void)
4103 struct target_ops *t;
4105 for (t = current_target.beneath; t != NULL; t = t->beneath)
4106 if (t->to_info_record != NULL)
4108 t->to_info_record (t);
4118 target_save_record (const char *filename)
4120 struct target_ops *t;
4122 for (t = current_target.beneath; t != NULL; t = t->beneath)
4123 if (t->to_save_record != NULL)
4125 t->to_save_record (t, filename);
4135 target_supports_delete_record (void)
4137 struct target_ops *t;
4139 for (t = current_target.beneath; t != NULL; t = t->beneath)
4140 if (t->to_delete_record != NULL)
4149 target_delete_record (void)
4151 struct target_ops *t;
4153 for (t = current_target.beneath; t != NULL; t = t->beneath)
4154 if (t->to_delete_record != NULL)
4156 t->to_delete_record (t);
4166 target_record_is_replaying (void)
4168 struct target_ops *t;
4170 for (t = current_target.beneath; t != NULL; t = t->beneath)
4171 if (t->to_record_is_replaying != NULL)
4172 return t->to_record_is_replaying (t);
4180 target_goto_record_begin (void)
4182 struct target_ops *t;
4184 for (t = current_target.beneath; t != NULL; t = t->beneath)
4185 if (t->to_goto_record_begin != NULL)
4187 t->to_goto_record_begin (t);
4197 target_goto_record_end (void)
4199 struct target_ops *t;
4201 for (t = current_target.beneath; t != NULL; t = t->beneath)
4202 if (t->to_goto_record_end != NULL)
4204 t->to_goto_record_end (t);
4214 target_goto_record (ULONGEST insn)
4216 struct target_ops *t;
4218 for (t = current_target.beneath; t != NULL; t = t->beneath)
4219 if (t->to_goto_record != NULL)
4221 t->to_goto_record (t, insn);
4231 target_insn_history (int size, int flags)
4233 struct target_ops *t;
4235 for (t = current_target.beneath; t != NULL; t = t->beneath)
4236 if (t->to_insn_history != NULL)
4238 t->to_insn_history (t, size, flags);
4248 target_insn_history_from (ULONGEST from, int size, int flags)
4250 struct target_ops *t;
4252 for (t = current_target.beneath; t != NULL; t = t->beneath)
4253 if (t->to_insn_history_from != NULL)
4255 t->to_insn_history_from (t, from, size, flags);
4265 target_insn_history_range (ULONGEST begin, ULONGEST end, int flags)
4267 struct target_ops *t;
4269 for (t = current_target.beneath; t != NULL; t = t->beneath)
4270 if (t->to_insn_history_range != NULL)
4272 t->to_insn_history_range (t, begin, end, flags);
4282 target_call_history (int size, int flags)
4284 struct target_ops *t;
4286 for (t = current_target.beneath; t != NULL; t = t->beneath)
4287 if (t->to_call_history != NULL)
4289 t->to_call_history (t, size, flags);
4299 target_call_history_from (ULONGEST begin, int size, int flags)
4301 struct target_ops *t;
4303 for (t = current_target.beneath; t != NULL; t = t->beneath)
4304 if (t->to_call_history_from != NULL)
4306 t->to_call_history_from (t, begin, size, flags);
4316 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
4318 struct target_ops *t;
4320 for (t = current_target.beneath; t != NULL; t = t->beneath)
4321 if (t->to_call_history_range != NULL)
4323 t->to_call_history_range (t, begin, end, flags);
4331 debug_to_prepare_to_store (struct target_ops *self, struct regcache *regcache)
4333 debug_target.to_prepare_to_store (&debug_target, regcache);
4335 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
4340 const struct frame_unwind *
4341 target_get_unwinder (void)
4343 struct target_ops *t;
4345 for (t = current_target.beneath; t != NULL; t = t->beneath)
4346 if (t->to_get_unwinder != NULL)
4347 return t->to_get_unwinder;
4354 const struct frame_unwind *
4355 target_get_tailcall_unwinder (void)
4357 struct target_ops *t;
4359 for (t = current_target.beneath; t != NULL; t = t->beneath)
4360 if (t->to_get_tailcall_unwinder != NULL)
4361 return t->to_get_tailcall_unwinder;
4369 forward_target_decr_pc_after_break (struct target_ops *ops,
4370 struct gdbarch *gdbarch)
4372 for (; ops != NULL; ops = ops->beneath)
4373 if (ops->to_decr_pc_after_break != NULL)
4374 return ops->to_decr_pc_after_break (ops, gdbarch);
4376 return gdbarch_decr_pc_after_break (gdbarch);
4382 target_decr_pc_after_break (struct gdbarch *gdbarch)
4384 return forward_target_decr_pc_after_break (current_target.beneath, gdbarch);
4388 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
4389 int write, struct mem_attrib *attrib,
4390 struct target_ops *target)
4394 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
4397 fprintf_unfiltered (gdb_stdlog,
4398 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
4399 paddress (target_gdbarch (), memaddr), len,
4400 write ? "write" : "read", retval);
4406 fputs_unfiltered (", bytes =", gdb_stdlog);
4407 for (i = 0; i < retval; i++)
4409 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
4411 if (targetdebug < 2 && i > 0)
4413 fprintf_unfiltered (gdb_stdlog, " ...");
4416 fprintf_unfiltered (gdb_stdlog, "\n");
4419 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
4423 fputc_unfiltered ('\n', gdb_stdlog);
4429 debug_to_files_info (struct target_ops *target)
4431 debug_target.to_files_info (target);
4433 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
4437 debug_to_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4438 struct bp_target_info *bp_tgt)
4442 retval = debug_target.to_insert_breakpoint (&debug_target, gdbarch, bp_tgt);
4444 fprintf_unfiltered (gdb_stdlog,
4445 "target_insert_breakpoint (%s, xxx) = %ld\n",
4446 core_addr_to_string (bp_tgt->placed_address),
4447 (unsigned long) retval);
4452 debug_to_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch,
4453 struct bp_target_info *bp_tgt)
4457 retval = debug_target.to_remove_breakpoint (&debug_target, gdbarch, bp_tgt);
4459 fprintf_unfiltered (gdb_stdlog,
4460 "target_remove_breakpoint (%s, xxx) = %ld\n",
4461 core_addr_to_string (bp_tgt->placed_address),
4462 (unsigned long) retval);
4467 debug_to_can_use_hw_breakpoint (struct target_ops *self,
4468 int type, int cnt, int from_tty)
4472 retval = debug_target.to_can_use_hw_breakpoint (&debug_target,
4473 type, cnt, from_tty);
4475 fprintf_unfiltered (gdb_stdlog,
4476 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
4477 (unsigned long) type,
4478 (unsigned long) cnt,
4479 (unsigned long) from_tty,
4480 (unsigned long) retval);
4485 debug_to_region_ok_for_hw_watchpoint (struct target_ops *self,
4486 CORE_ADDR addr, int len)
4490 retval = debug_target.to_region_ok_for_hw_watchpoint (&debug_target,
4493 fprintf_unfiltered (gdb_stdlog,
4494 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
4495 core_addr_to_string (addr), (unsigned long) len,
4496 core_addr_to_string (retval));
4501 debug_to_can_accel_watchpoint_condition (struct target_ops *self,
4502 CORE_ADDR addr, int len, int rw,
4503 struct expression *cond)
4507 retval = debug_target.to_can_accel_watchpoint_condition (&debug_target,
4511 fprintf_unfiltered (gdb_stdlog,
4512 "target_can_accel_watchpoint_condition "
4513 "(%s, %d, %d, %s) = %ld\n",
4514 core_addr_to_string (addr), len, rw,
4515 host_address_to_string (cond), (unsigned long) retval);
4520 debug_to_stopped_by_watchpoint (struct target_ops *ops)
4524 retval = debug_target.to_stopped_by_watchpoint (&debug_target);
4526 fprintf_unfiltered (gdb_stdlog,
4527 "target_stopped_by_watchpoint () = %ld\n",
4528 (unsigned long) retval);
4533 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
4537 retval = debug_target.to_stopped_data_address (target, addr);
4539 fprintf_unfiltered (gdb_stdlog,
4540 "target_stopped_data_address ([%s]) = %ld\n",
4541 core_addr_to_string (*addr),
4542 (unsigned long)retval);
4547 debug_to_watchpoint_addr_within_range (struct target_ops *target,
4549 CORE_ADDR start, int length)
4553 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
4556 fprintf_filtered (gdb_stdlog,
4557 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
4558 core_addr_to_string (addr), core_addr_to_string (start),
4564 debug_to_insert_hw_breakpoint (struct target_ops *self,
4565 struct gdbarch *gdbarch,
4566 struct bp_target_info *bp_tgt)
4570 retval = debug_target.to_insert_hw_breakpoint (&debug_target,
4573 fprintf_unfiltered (gdb_stdlog,
4574 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
4575 core_addr_to_string (bp_tgt->placed_address),
4576 (unsigned long) retval);
4581 debug_to_remove_hw_breakpoint (struct target_ops *self,
4582 struct gdbarch *gdbarch,
4583 struct bp_target_info *bp_tgt)
4587 retval = debug_target.to_remove_hw_breakpoint (&debug_target,
4590 fprintf_unfiltered (gdb_stdlog,
4591 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
4592 core_addr_to_string (bp_tgt->placed_address),
4593 (unsigned long) retval);
4598 debug_to_insert_watchpoint (struct target_ops *self,
4599 CORE_ADDR addr, int len, int type,
4600 struct expression *cond)
4604 retval = debug_target.to_insert_watchpoint (&debug_target,
4605 addr, len, type, cond);
4607 fprintf_unfiltered (gdb_stdlog,
4608 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
4609 core_addr_to_string (addr), len, type,
4610 host_address_to_string (cond), (unsigned long) retval);
4615 debug_to_remove_watchpoint (struct target_ops *self,
4616 CORE_ADDR addr, int len, int type,
4617 struct expression *cond)
4621 retval = debug_target.to_remove_watchpoint (&debug_target,
4622 addr, len, type, cond);
4624 fprintf_unfiltered (gdb_stdlog,
4625 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
4626 core_addr_to_string (addr), len, type,
4627 host_address_to_string (cond), (unsigned long) retval);
4632 debug_to_terminal_init (struct target_ops *self)
4634 debug_target.to_terminal_init (&debug_target);
4636 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
4640 debug_to_terminal_inferior (struct target_ops *self)
4642 debug_target.to_terminal_inferior (&debug_target);
4644 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
4648 debug_to_terminal_ours_for_output (struct target_ops *self)
4650 debug_target.to_terminal_ours_for_output (&debug_target);
4652 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
4656 debug_to_terminal_ours (struct target_ops *self)
4658 debug_target.to_terminal_ours (&debug_target);
4660 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
4664 debug_to_terminal_save_ours (struct target_ops *self)
4666 debug_target.to_terminal_save_ours (&debug_target);
4668 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
4672 debug_to_terminal_info (struct target_ops *self,
4673 const char *arg, int from_tty)
4675 debug_target.to_terminal_info (&debug_target, arg, from_tty);
4677 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
4682 debug_to_load (struct target_ops *self, char *args, int from_tty)
4684 debug_target.to_load (&debug_target, args, from_tty);
4686 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
4690 debug_to_post_startup_inferior (struct target_ops *self, ptid_t ptid)
4692 debug_target.to_post_startup_inferior (&debug_target, ptid);
4694 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
4695 ptid_get_pid (ptid));
4699 debug_to_insert_fork_catchpoint (struct target_ops *self, int pid)
4703 retval = debug_target.to_insert_fork_catchpoint (&debug_target, pid);
4705 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
4712 debug_to_remove_fork_catchpoint (struct target_ops *self, int pid)
4716 retval = debug_target.to_remove_fork_catchpoint (&debug_target, pid);
4718 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
4725 debug_to_insert_vfork_catchpoint (struct target_ops *self, int pid)
4729 retval = debug_target.to_insert_vfork_catchpoint (&debug_target, pid);
4731 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
4738 debug_to_remove_vfork_catchpoint (struct target_ops *self, int pid)
4742 retval = debug_target.to_remove_vfork_catchpoint (&debug_target, pid);
4744 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
4751 debug_to_insert_exec_catchpoint (struct target_ops *self, int pid)
4755 retval = debug_target.to_insert_exec_catchpoint (&debug_target, pid);
4757 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
4764 debug_to_remove_exec_catchpoint (struct target_ops *self, int pid)
4768 retval = debug_target.to_remove_exec_catchpoint (&debug_target, pid);
4770 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
4777 debug_to_has_exited (struct target_ops *self,
4778 int pid, int wait_status, int *exit_status)
4782 has_exited = debug_target.to_has_exited (&debug_target,
4783 pid, wait_status, exit_status);
4785 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
4786 pid, wait_status, *exit_status, has_exited);
4792 debug_to_can_run (struct target_ops *self)
4796 retval = debug_target.to_can_run (&debug_target);
4798 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
4803 static struct gdbarch *
4804 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
4806 struct gdbarch *retval;
4808 retval = debug_target.to_thread_architecture (ops, ptid);
4810 fprintf_unfiltered (gdb_stdlog,
4811 "target_thread_architecture (%s) = %s [%s]\n",
4812 target_pid_to_str (ptid),
4813 host_address_to_string (retval),
4814 gdbarch_bfd_arch_info (retval)->printable_name);
4819 debug_to_stop (struct target_ops *self, ptid_t ptid)
4821 debug_target.to_stop (&debug_target, ptid);
4823 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
4824 target_pid_to_str (ptid));
4828 debug_to_rcmd (struct target_ops *self, char *command,
4829 struct ui_file *outbuf)
4831 debug_target.to_rcmd (&debug_target, command, outbuf);
4832 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
4836 debug_to_pid_to_exec_file (struct target_ops *self, int pid)
4840 exec_file = debug_target.to_pid_to_exec_file (&debug_target, pid);
4842 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
4849 setup_target_debug (void)
4851 memcpy (&debug_target, ¤t_target, sizeof debug_target);
4853 current_target.to_open = debug_to_open;
4854 current_target.to_post_attach = debug_to_post_attach;
4855 current_target.to_prepare_to_store = debug_to_prepare_to_store;
4856 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
4857 current_target.to_files_info = debug_to_files_info;
4858 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
4859 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
4860 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
4861 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
4862 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
4863 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
4864 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
4865 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
4866 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4867 current_target.to_watchpoint_addr_within_range
4868 = debug_to_watchpoint_addr_within_range;
4869 current_target.to_region_ok_for_hw_watchpoint
4870 = debug_to_region_ok_for_hw_watchpoint;
4871 current_target.to_can_accel_watchpoint_condition
4872 = debug_to_can_accel_watchpoint_condition;
4873 current_target.to_terminal_init = debug_to_terminal_init;
4874 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4875 current_target.to_terminal_ours_for_output
4876 = debug_to_terminal_ours_for_output;
4877 current_target.to_terminal_ours = debug_to_terminal_ours;
4878 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4879 current_target.to_terminal_info = debug_to_terminal_info;
4880 current_target.to_load = debug_to_load;
4881 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4882 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4883 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4884 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4885 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4886 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4887 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4888 current_target.to_has_exited = debug_to_has_exited;
4889 current_target.to_can_run = debug_to_can_run;
4890 current_target.to_stop = debug_to_stop;
4891 current_target.to_rcmd = debug_to_rcmd;
4892 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4893 current_target.to_thread_architecture = debug_to_thread_architecture;
4897 static char targ_desc[] =
4898 "Names of targets and files being debugged.\nShows the entire \
4899 stack of targets currently in use (including the exec-file,\n\
4900 core-file, and process, if any), as well as the symbol file name.";
4903 default_rcmd (struct target_ops *self, char *command, struct ui_file *output)
4905 error (_("\"monitor\" command not supported by this target."));
4909 do_monitor_command (char *cmd,
4912 target_rcmd (cmd, gdb_stdtarg);
4915 /* Print the name of each layers of our target stack. */
4918 maintenance_print_target_stack (char *cmd, int from_tty)
4920 struct target_ops *t;
4922 printf_filtered (_("The current target stack is:\n"));
4924 for (t = target_stack; t != NULL; t = t->beneath)
4926 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4930 /* Controls if async mode is permitted. */
4931 int target_async_permitted = 0;
4933 /* The set command writes to this variable. If the inferior is
4934 executing, target_async_permitted is *not* updated. */
4935 static int target_async_permitted_1 = 0;
4938 set_target_async_command (char *args, int from_tty,
4939 struct cmd_list_element *c)
4941 if (have_live_inferiors ())
4943 target_async_permitted_1 = target_async_permitted;
4944 error (_("Cannot change this setting while the inferior is running."));
4947 target_async_permitted = target_async_permitted_1;
4951 show_target_async_command (struct ui_file *file, int from_tty,
4952 struct cmd_list_element *c,
4955 fprintf_filtered (file,
4956 _("Controlling the inferior in "
4957 "asynchronous mode is %s.\n"), value);
4960 /* Temporary copies of permission settings. */
4962 static int may_write_registers_1 = 1;
4963 static int may_write_memory_1 = 1;
4964 static int may_insert_breakpoints_1 = 1;
4965 static int may_insert_tracepoints_1 = 1;
4966 static int may_insert_fast_tracepoints_1 = 1;
4967 static int may_stop_1 = 1;
4969 /* Make the user-set values match the real values again. */
4972 update_target_permissions (void)
4974 may_write_registers_1 = may_write_registers;
4975 may_write_memory_1 = may_write_memory;
4976 may_insert_breakpoints_1 = may_insert_breakpoints;
4977 may_insert_tracepoints_1 = may_insert_tracepoints;
4978 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4979 may_stop_1 = may_stop;
4982 /* The one function handles (most of) the permission flags in the same
4986 set_target_permissions (char *args, int from_tty,
4987 struct cmd_list_element *c)
4989 if (target_has_execution)
4991 update_target_permissions ();
4992 error (_("Cannot change this setting while the inferior is running."));
4995 /* Make the real values match the user-changed values. */
4996 may_write_registers = may_write_registers_1;
4997 may_insert_breakpoints = may_insert_breakpoints_1;
4998 may_insert_tracepoints = may_insert_tracepoints_1;
4999 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
5000 may_stop = may_stop_1;
5001 update_observer_mode ();
5004 /* Set memory write permission independently of observer mode. */
5007 set_write_memory_permission (char *args, int from_tty,
5008 struct cmd_list_element *c)
5010 /* Make the real values match the user-changed values. */
5011 may_write_memory = may_write_memory_1;
5012 update_observer_mode ();
5017 initialize_targets (void)
5019 init_dummy_target ();
5020 push_target (&dummy_target);
5022 add_info ("target", target_info, targ_desc);
5023 add_info ("files", target_info, targ_desc);
5025 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
5026 Set target debugging."), _("\
5027 Show target debugging."), _("\
5028 When non-zero, target debugging is enabled. Higher numbers are more\n\
5029 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
5033 &setdebuglist, &showdebuglist);
5035 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
5036 &trust_readonly, _("\
5037 Set mode for reading from readonly sections."), _("\
5038 Show mode for reading from readonly sections."), _("\
5039 When this mode is on, memory reads from readonly sections (such as .text)\n\
5040 will be read from the object file instead of from the target. This will\n\
5041 result in significant performance improvement for remote targets."),
5043 show_trust_readonly,
5044 &setlist, &showlist);
5046 add_com ("monitor", class_obscure, do_monitor_command,
5047 _("Send a command to the remote monitor (remote targets only)."));
5049 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
5050 _("Print the name of each layer of the internal target stack."),
5051 &maintenanceprintlist);
5053 add_setshow_boolean_cmd ("target-async", no_class,
5054 &target_async_permitted_1, _("\
5055 Set whether gdb controls the inferior in asynchronous mode."), _("\
5056 Show whether gdb controls the inferior in asynchronous mode."), _("\
5057 Tells gdb whether to control the inferior in asynchronous mode."),
5058 set_target_async_command,
5059 show_target_async_command,
5063 add_setshow_boolean_cmd ("may-write-registers", class_support,
5064 &may_write_registers_1, _("\
5065 Set permission to write into registers."), _("\
5066 Show permission to write into registers."), _("\
5067 When this permission is on, GDB may write into the target's registers.\n\
5068 Otherwise, any sort of write attempt will result in an error."),
5069 set_target_permissions, NULL,
5070 &setlist, &showlist);
5072 add_setshow_boolean_cmd ("may-write-memory", class_support,
5073 &may_write_memory_1, _("\
5074 Set permission to write into target memory."), _("\
5075 Show permission to write into target memory."), _("\
5076 When this permission is on, GDB may write into the target's memory.\n\
5077 Otherwise, any sort of write attempt will result in an error."),
5078 set_write_memory_permission, NULL,
5079 &setlist, &showlist);
5081 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
5082 &may_insert_breakpoints_1, _("\
5083 Set permission to insert breakpoints in the target."), _("\
5084 Show permission to insert breakpoints in the target."), _("\
5085 When this permission is on, GDB may insert breakpoints in the program.\n\
5086 Otherwise, any sort of insertion attempt will result in an error."),
5087 set_target_permissions, NULL,
5088 &setlist, &showlist);
5090 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
5091 &may_insert_tracepoints_1, _("\
5092 Set permission to insert tracepoints in the target."), _("\
5093 Show permission to insert tracepoints in the target."), _("\
5094 When this permission is on, GDB may insert tracepoints in the program.\n\
5095 Otherwise, any sort of insertion attempt will result in an error."),
5096 set_target_permissions, NULL,
5097 &setlist, &showlist);
5099 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
5100 &may_insert_fast_tracepoints_1, _("\
5101 Set permission to insert fast tracepoints in the target."), _("\
5102 Show permission to insert fast tracepoints in the target."), _("\
5103 When this permission is on, GDB may insert fast tracepoints.\n\
5104 Otherwise, any sort of insertion attempt will result in an error."),
5105 set_target_permissions, NULL,
5106 &setlist, &showlist);
5108 add_setshow_boolean_cmd ("may-interrupt", class_support,
5110 Set permission to interrupt or signal the target."), _("\
5111 Show permission to interrupt or signal the target."), _("\
5112 When this permission is on, GDB may interrupt/stop the target's execution.\n\
5113 Otherwise, any attempt to interrupt or stop will be ignored."),
5114 set_target_permissions, NULL,
5115 &setlist, &showlist);