1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
38 #include "gdb_assert.h"
40 #include "exceptions.h"
41 #include "target-descriptions.h"
42 #include "gdbthread.h"
45 #include "inline-frame.h"
46 #include "tracepoint.h"
48 static void target_info (char *, int);
50 static void default_terminal_info (char *, int);
52 static int default_watchpoint_addr_within_range (struct target_ops *,
53 CORE_ADDR, CORE_ADDR, int);
55 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
57 static int nosymbol (char *, CORE_ADDR *);
59 static void tcomplain (void) ATTRIBUTE_NORETURN;
61 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
63 static int return_zero (void);
65 static int return_one (void);
67 static int return_minus_one (void);
69 void target_ignore (void);
71 static void target_command (char *, int);
73 static struct target_ops *find_default_run_target (char *);
75 static LONGEST default_xfer_partial (struct target_ops *ops,
76 enum target_object object,
77 const char *annex, gdb_byte *readbuf,
78 const gdb_byte *writebuf,
79 ULONGEST offset, LONGEST len);
81 static LONGEST current_xfer_partial (struct target_ops *ops,
82 enum target_object object,
83 const char *annex, gdb_byte *readbuf,
84 const gdb_byte *writebuf,
85 ULONGEST offset, LONGEST len);
87 static LONGEST target_xfer_partial (struct target_ops *ops,
88 enum target_object object,
90 void *readbuf, const void *writebuf,
91 ULONGEST offset, LONGEST len);
93 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
96 static void init_dummy_target (void);
98 static struct target_ops debug_target;
100 static void debug_to_open (char *, int);
102 static void debug_to_prepare_to_store (struct regcache *);
104 static void debug_to_files_info (struct target_ops *);
106 static int debug_to_insert_breakpoint (struct gdbarch *,
107 struct bp_target_info *);
109 static int debug_to_remove_breakpoint (struct gdbarch *,
110 struct bp_target_info *);
112 static int debug_to_can_use_hw_breakpoint (int, int, int);
114 static int debug_to_insert_hw_breakpoint (struct gdbarch *,
115 struct bp_target_info *);
117 static int debug_to_remove_hw_breakpoint (struct gdbarch *,
118 struct bp_target_info *);
120 static int debug_to_insert_watchpoint (CORE_ADDR, int, int,
121 struct expression *);
123 static int debug_to_remove_watchpoint (CORE_ADDR, int, int,
124 struct expression *);
126 static int debug_to_stopped_by_watchpoint (void);
128 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
130 static int debug_to_watchpoint_addr_within_range (struct target_ops *,
131 CORE_ADDR, CORE_ADDR, int);
133 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
135 static int debug_to_can_accel_watchpoint_condition (CORE_ADDR, int, int,
136 struct expression *);
138 static void debug_to_terminal_init (void);
140 static void debug_to_terminal_inferior (void);
142 static void debug_to_terminal_ours_for_output (void);
144 static void debug_to_terminal_save_ours (void);
146 static void debug_to_terminal_ours (void);
148 static void debug_to_terminal_info (char *, int);
150 static void debug_to_load (char *, int);
152 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
154 static int debug_to_can_run (void);
156 static void debug_to_notice_signals (ptid_t);
158 static void debug_to_stop (ptid_t);
160 /* Pointer to array of target architecture structures; the size of the
161 array; the current index into the array; the allocated size of the
163 struct target_ops **target_structs;
164 unsigned target_struct_size;
165 unsigned target_struct_index;
166 unsigned target_struct_allocsize;
167 #define DEFAULT_ALLOCSIZE 10
169 /* The initial current target, so that there is always a semi-valid
172 static struct target_ops dummy_target;
174 /* Top of target stack. */
176 static struct target_ops *target_stack;
178 /* The target structure we are currently using to talk to a process
179 or file or whatever "inferior" we have. */
181 struct target_ops current_target;
183 /* Command list for target. */
185 static struct cmd_list_element *targetlist = NULL;
187 /* Nonzero if we should trust readonly sections from the
188 executable when reading memory. */
190 static int trust_readonly = 0;
192 /* Nonzero if we should show true memory content including
193 memory breakpoint inserted by gdb. */
195 static int show_memory_breakpoints = 0;
197 /* These globals control whether GDB attempts to perform these
198 operations; they are useful for targets that need to prevent
199 inadvertant disruption, such as in non-stop mode. */
201 int may_write_registers = 1;
203 int may_write_memory = 1;
205 int may_insert_breakpoints = 1;
207 int may_insert_tracepoints = 1;
209 int may_insert_fast_tracepoints = 1;
213 /* Non-zero if we want to see trace of target level stuff. */
215 static int targetdebug = 0;
217 show_targetdebug (struct ui_file *file, int from_tty,
218 struct cmd_list_element *c, const char *value)
220 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
223 static void setup_target_debug (void);
225 /* The option sets this. */
226 static int stack_cache_enabled_p_1 = 1;
227 /* And set_stack_cache_enabled_p updates this.
228 The reason for the separation is so that we don't flush the cache for
229 on->on transitions. */
230 static int stack_cache_enabled_p = 1;
232 /* This is called *after* the stack-cache has been set.
233 Flush the cache for off->on and on->off transitions.
234 There's no real need to flush the cache for on->off transitions,
235 except cleanliness. */
238 set_stack_cache_enabled_p (char *args, int from_tty,
239 struct cmd_list_element *c)
241 if (stack_cache_enabled_p != stack_cache_enabled_p_1)
242 target_dcache_invalidate ();
244 stack_cache_enabled_p = stack_cache_enabled_p_1;
248 show_stack_cache_enabled_p (struct ui_file *file, int from_tty,
249 struct cmd_list_element *c, const char *value)
251 fprintf_filtered (file, _("Cache use for stack accesses is %s.\n"), value);
254 /* Cache of memory operations, to speed up remote access. */
255 static DCACHE *target_dcache;
257 /* Invalidate the target dcache. */
260 target_dcache_invalidate (void)
262 dcache_invalidate (target_dcache);
265 /* The user just typed 'target' without the name of a target. */
268 target_command (char *arg, int from_tty)
270 fputs_filtered ("Argument required (target name). Try `help target'\n",
274 /* Default target_has_* methods for process_stratum targets. */
277 default_child_has_all_memory (struct target_ops *ops)
279 /* If no inferior selected, then we can't read memory here. */
280 if (ptid_equal (inferior_ptid, null_ptid))
287 default_child_has_memory (struct target_ops *ops)
289 /* If no inferior selected, then we can't read memory here. */
290 if (ptid_equal (inferior_ptid, null_ptid))
297 default_child_has_stack (struct target_ops *ops)
299 /* If no inferior selected, there's no stack. */
300 if (ptid_equal (inferior_ptid, null_ptid))
307 default_child_has_registers (struct target_ops *ops)
309 /* Can't read registers from no inferior. */
310 if (ptid_equal (inferior_ptid, null_ptid))
317 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
319 /* If there's no thread selected, then we can't make it run through
321 if (ptid_equal (the_ptid, null_ptid))
329 target_has_all_memory_1 (void)
331 struct target_ops *t;
333 for (t = current_target.beneath; t != NULL; t = t->beneath)
334 if (t->to_has_all_memory (t))
341 target_has_memory_1 (void)
343 struct target_ops *t;
345 for (t = current_target.beneath; t != NULL; t = t->beneath)
346 if (t->to_has_memory (t))
353 target_has_stack_1 (void)
355 struct target_ops *t;
357 for (t = current_target.beneath; t != NULL; t = t->beneath)
358 if (t->to_has_stack (t))
365 target_has_registers_1 (void)
367 struct target_ops *t;
369 for (t = current_target.beneath; t != NULL; t = t->beneath)
370 if (t->to_has_registers (t))
377 target_has_execution_1 (ptid_t the_ptid)
379 struct target_ops *t;
381 for (t = current_target.beneath; t != NULL; t = t->beneath)
382 if (t->to_has_execution (t, the_ptid))
389 target_has_execution_current (void)
391 return target_has_execution_1 (inferior_ptid);
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops *t)
399 /* Provide default values for all "must have" methods. */
400 if (t->to_xfer_partial == NULL)
401 t->to_xfer_partial = default_xfer_partial;
403 if (t->to_has_all_memory == NULL)
404 t->to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
406 if (t->to_has_memory == NULL)
407 t->to_has_memory = (int (*) (struct target_ops *)) return_zero;
409 if (t->to_has_stack == NULL)
410 t->to_has_stack = (int (*) (struct target_ops *)) return_zero;
412 if (t->to_has_registers == NULL)
413 t->to_has_registers = (int (*) (struct target_ops *)) return_zero;
415 if (t->to_has_execution == NULL)
416 t->to_has_execution = (int (*) (struct target_ops *, ptid_t)) return_zero;
420 target_struct_allocsize = DEFAULT_ALLOCSIZE;
421 target_structs = (struct target_ops **) xmalloc
422 (target_struct_allocsize * sizeof (*target_structs));
424 if (target_struct_size >= target_struct_allocsize)
426 target_struct_allocsize *= 2;
427 target_structs = (struct target_ops **)
428 xrealloc ((char *) target_structs,
429 target_struct_allocsize * sizeof (*target_structs));
431 target_structs[target_struct_size++] = t;
433 if (targetlist == NULL)
434 add_prefix_cmd ("target", class_run, target_command, _("\
435 Connect to a target machine or process.\n\
436 The first argument is the type or protocol of the target machine.\n\
437 Remaining arguments are interpreted by the target protocol. For more\n\
438 information on the arguments for a particular protocol, type\n\
439 `help target ' followed by the protocol name."),
440 &targetlist, "target ", 0, &cmdlist);
441 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
454 struct target_ops *t;
456 for (t = current_target.beneath; t != NULL; t = t->beneath)
457 if (t->to_kill != NULL)
460 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
470 target_load (char *arg, int from_tty)
472 target_dcache_invalidate ();
473 (*current_target.to_load) (arg, from_tty);
477 target_create_inferior (char *exec_file, char *args,
478 char **env, int from_tty)
480 struct target_ops *t;
482 for (t = current_target.beneath; t != NULL; t = t->beneath)
484 if (t->to_create_inferior != NULL)
486 t->to_create_inferior (t, exec_file, args, env, from_tty);
488 fprintf_unfiltered (gdb_stdlog,
489 "target_create_inferior (%s, %s, xxx, %d)\n",
490 exec_file, args, from_tty);
495 internal_error (__FILE__, __LINE__,
496 _("could not find a target to create inferior"));
500 target_terminal_inferior (void)
502 /* A background resume (``run&'') should leave GDB in control of the
503 terminal. Use target_can_async_p, not target_is_async_p, since at
504 this point the target is not async yet. However, if sync_execution
505 is not set, we know it will become async prior to resume. */
506 if (target_can_async_p () && !sync_execution)
509 /* If GDB is resuming the inferior in the foreground, install
510 inferior's terminal modes. */
511 (*current_target.to_terminal_inferior) ();
515 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
516 struct target_ops *t)
518 errno = EIO; /* Can't read/write this location. */
519 return 0; /* No bytes handled. */
525 error (_("You can't do that when your target is `%s'"),
526 current_target.to_shortname);
532 error (_("You can't do that without a process to debug."));
536 nosymbol (char *name, CORE_ADDR *addrp)
538 return 1; /* Symbol does not exist in target env. */
542 default_terminal_info (char *args, int from_tty)
544 printf_unfiltered (_("No saved terminal information.\n"));
547 /* A default implementation for the to_get_ada_task_ptid target method.
549 This function builds the PTID by using both LWP and TID as part of
550 the PTID lwp and tid elements. The pid used is the pid of the
554 default_get_ada_task_ptid (long lwp, long tid)
556 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
559 /* Go through the target stack from top to bottom, copying over zero
560 entries in current_target, then filling in still empty entries. In
561 effect, we are doing class inheritance through the pushed target
564 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
565 is currently implemented, is that it discards any knowledge of
566 which target an inherited method originally belonged to.
567 Consequently, new new target methods should instead explicitly and
568 locally search the target stack for the target that can handle the
572 update_current_target (void)
574 struct target_ops *t;
576 /* First, reset current's contents. */
577 memset (¤t_target, 0, sizeof (current_target));
579 #define INHERIT(FIELD, TARGET) \
580 if (!current_target.FIELD) \
581 current_target.FIELD = (TARGET)->FIELD
583 for (t = target_stack; t; t = t->beneath)
585 INHERIT (to_shortname, t);
586 INHERIT (to_longname, t);
588 /* Do not inherit to_open. */
589 /* Do not inherit to_close. */
590 /* Do not inherit to_attach. */
591 INHERIT (to_post_attach, t);
592 INHERIT (to_attach_no_wait, t);
593 /* Do not inherit to_detach. */
594 /* Do not inherit to_disconnect. */
595 /* Do not inherit to_resume. */
596 /* Do not inherit to_wait. */
597 /* Do not inherit to_fetch_registers. */
598 /* Do not inherit to_store_registers. */
599 INHERIT (to_prepare_to_store, t);
600 INHERIT (deprecated_xfer_memory, t);
601 INHERIT (to_files_info, t);
602 INHERIT (to_insert_breakpoint, t);
603 INHERIT (to_remove_breakpoint, t);
604 INHERIT (to_can_use_hw_breakpoint, t);
605 INHERIT (to_insert_hw_breakpoint, t);
606 INHERIT (to_remove_hw_breakpoint, t);
607 INHERIT (to_insert_watchpoint, t);
608 INHERIT (to_remove_watchpoint, t);
609 INHERIT (to_stopped_data_address, t);
610 INHERIT (to_have_steppable_watchpoint, t);
611 INHERIT (to_have_continuable_watchpoint, t);
612 INHERIT (to_stopped_by_watchpoint, t);
613 INHERIT (to_watchpoint_addr_within_range, t);
614 INHERIT (to_region_ok_for_hw_watchpoint, t);
615 INHERIT (to_can_accel_watchpoint_condition, t);
616 INHERIT (to_terminal_init, t);
617 INHERIT (to_terminal_inferior, t);
618 INHERIT (to_terminal_ours_for_output, t);
619 INHERIT (to_terminal_ours, t);
620 INHERIT (to_terminal_save_ours, t);
621 INHERIT (to_terminal_info, t);
622 /* Do not inherit to_kill. */
623 INHERIT (to_load, t);
624 INHERIT (to_lookup_symbol, t);
625 /* Do no inherit to_create_inferior. */
626 INHERIT (to_post_startup_inferior, t);
627 INHERIT (to_insert_fork_catchpoint, t);
628 INHERIT (to_remove_fork_catchpoint, t);
629 INHERIT (to_insert_vfork_catchpoint, t);
630 INHERIT (to_remove_vfork_catchpoint, t);
631 /* Do not inherit to_follow_fork. */
632 INHERIT (to_insert_exec_catchpoint, t);
633 INHERIT (to_remove_exec_catchpoint, t);
634 INHERIT (to_set_syscall_catchpoint, t);
635 INHERIT (to_has_exited, t);
636 /* Do not inherit to_mourn_inferior. */
637 INHERIT (to_can_run, t);
638 INHERIT (to_notice_signals, t);
639 /* Do not inherit to_thread_alive. */
640 /* Do not inherit to_find_new_threads. */
641 /* Do not inherit to_pid_to_str. */
642 INHERIT (to_extra_thread_info, t);
643 INHERIT (to_thread_name, t);
644 INHERIT (to_stop, t);
645 /* Do not inherit to_xfer_partial. */
646 INHERIT (to_rcmd, t);
647 INHERIT (to_pid_to_exec_file, t);
648 INHERIT (to_log_command, t);
649 INHERIT (to_stratum, t);
650 /* Do not inherit to_has_all_memory. */
651 /* Do not inherit to_has_memory. */
652 /* Do not inherit to_has_stack. */
653 /* Do not inherit to_has_registers. */
654 /* Do not inherit to_has_execution. */
655 INHERIT (to_has_thread_control, t);
656 INHERIT (to_can_async_p, t);
657 INHERIT (to_is_async_p, t);
658 INHERIT (to_async, t);
659 INHERIT (to_async_mask, t);
660 INHERIT (to_find_memory_regions, t);
661 INHERIT (to_make_corefile_notes, t);
662 INHERIT (to_get_bookmark, t);
663 INHERIT (to_goto_bookmark, t);
664 /* Do not inherit to_get_thread_local_address. */
665 INHERIT (to_can_execute_reverse, t);
666 INHERIT (to_thread_architecture, t);
667 /* Do not inherit to_read_description. */
668 INHERIT (to_get_ada_task_ptid, t);
669 /* Do not inherit to_search_memory. */
670 INHERIT (to_supports_multi_process, t);
671 INHERIT (to_trace_init, t);
672 INHERIT (to_download_tracepoint, t);
673 INHERIT (to_download_trace_state_variable, t);
674 INHERIT (to_trace_set_readonly_regions, t);
675 INHERIT (to_trace_start, t);
676 INHERIT (to_get_trace_status, t);
677 INHERIT (to_trace_stop, t);
678 INHERIT (to_trace_find, t);
679 INHERIT (to_get_trace_state_variable_value, t);
680 INHERIT (to_save_trace_data, t);
681 INHERIT (to_upload_tracepoints, t);
682 INHERIT (to_upload_trace_state_variables, t);
683 INHERIT (to_get_raw_trace_data, t);
684 INHERIT (to_set_disconnected_tracing, t);
685 INHERIT (to_set_circular_trace_buffer, t);
686 INHERIT (to_get_tib_address, t);
687 INHERIT (to_set_permissions, t);
688 INHERIT (to_static_tracepoint_marker_at, t);
689 INHERIT (to_static_tracepoint_markers_by_strid, t);
690 INHERIT (to_traceframe_info, t);
691 INHERIT (to_magic, t);
692 /* Do not inherit to_memory_map. */
693 /* Do not inherit to_flash_erase. */
694 /* Do not inherit to_flash_done. */
698 /* Clean up a target struct so it no longer has any zero pointers in
699 it. Some entries are defaulted to a method that print an error,
700 others are hard-wired to a standard recursive default. */
702 #define de_fault(field, value) \
703 if (!current_target.field) \
704 current_target.field = value
707 (void (*) (char *, int))
712 de_fault (to_post_attach,
715 de_fault (to_prepare_to_store,
716 (void (*) (struct regcache *))
718 de_fault (deprecated_xfer_memory,
719 (int (*) (CORE_ADDR, gdb_byte *, int, int,
720 struct mem_attrib *, struct target_ops *))
722 de_fault (to_files_info,
723 (void (*) (struct target_ops *))
725 de_fault (to_insert_breakpoint,
726 memory_insert_breakpoint);
727 de_fault (to_remove_breakpoint,
728 memory_remove_breakpoint);
729 de_fault (to_can_use_hw_breakpoint,
730 (int (*) (int, int, int))
732 de_fault (to_insert_hw_breakpoint,
733 (int (*) (struct gdbarch *, struct bp_target_info *))
735 de_fault (to_remove_hw_breakpoint,
736 (int (*) (struct gdbarch *, struct bp_target_info *))
738 de_fault (to_insert_watchpoint,
739 (int (*) (CORE_ADDR, int, int, struct expression *))
741 de_fault (to_remove_watchpoint,
742 (int (*) (CORE_ADDR, int, int, struct expression *))
744 de_fault (to_stopped_by_watchpoint,
747 de_fault (to_stopped_data_address,
748 (int (*) (struct target_ops *, CORE_ADDR *))
750 de_fault (to_watchpoint_addr_within_range,
751 default_watchpoint_addr_within_range);
752 de_fault (to_region_ok_for_hw_watchpoint,
753 default_region_ok_for_hw_watchpoint);
754 de_fault (to_can_accel_watchpoint_condition,
755 (int (*) (CORE_ADDR, int, int, struct expression *))
757 de_fault (to_terminal_init,
760 de_fault (to_terminal_inferior,
763 de_fault (to_terminal_ours_for_output,
766 de_fault (to_terminal_ours,
769 de_fault (to_terminal_save_ours,
772 de_fault (to_terminal_info,
773 default_terminal_info);
775 (void (*) (char *, int))
777 de_fault (to_lookup_symbol,
778 (int (*) (char *, CORE_ADDR *))
780 de_fault (to_post_startup_inferior,
783 de_fault (to_insert_fork_catchpoint,
786 de_fault (to_remove_fork_catchpoint,
789 de_fault (to_insert_vfork_catchpoint,
792 de_fault (to_remove_vfork_catchpoint,
795 de_fault (to_insert_exec_catchpoint,
798 de_fault (to_remove_exec_catchpoint,
801 de_fault (to_set_syscall_catchpoint,
802 (int (*) (int, int, int, int, int *))
804 de_fault (to_has_exited,
805 (int (*) (int, int, int *))
807 de_fault (to_can_run,
809 de_fault (to_notice_signals,
812 de_fault (to_extra_thread_info,
813 (char *(*) (struct thread_info *))
815 de_fault (to_thread_name,
816 (char *(*) (struct thread_info *))
821 current_target.to_xfer_partial = current_xfer_partial;
823 (void (*) (char *, struct ui_file *))
825 de_fault (to_pid_to_exec_file,
829 (void (*) (void (*) (enum inferior_event_type, void*), void*))
831 de_fault (to_async_mask,
834 de_fault (to_thread_architecture,
835 default_thread_architecture);
836 current_target.to_read_description = NULL;
837 de_fault (to_get_ada_task_ptid,
838 (ptid_t (*) (long, long))
839 default_get_ada_task_ptid);
840 de_fault (to_supports_multi_process,
843 de_fault (to_trace_init,
846 de_fault (to_download_tracepoint,
847 (void (*) (struct breakpoint *))
849 de_fault (to_download_trace_state_variable,
850 (void (*) (struct trace_state_variable *))
852 de_fault (to_trace_set_readonly_regions,
855 de_fault (to_trace_start,
858 de_fault (to_get_trace_status,
859 (int (*) (struct trace_status *))
861 de_fault (to_trace_stop,
864 de_fault (to_trace_find,
865 (int (*) (enum trace_find_type, int, ULONGEST, ULONGEST, int *))
867 de_fault (to_get_trace_state_variable_value,
868 (int (*) (int, LONGEST *))
870 de_fault (to_save_trace_data,
871 (int (*) (const char *))
873 de_fault (to_upload_tracepoints,
874 (int (*) (struct uploaded_tp **))
876 de_fault (to_upload_trace_state_variables,
877 (int (*) (struct uploaded_tsv **))
879 de_fault (to_get_raw_trace_data,
880 (LONGEST (*) (gdb_byte *, ULONGEST, LONGEST))
882 de_fault (to_set_disconnected_tracing,
885 de_fault (to_set_circular_trace_buffer,
888 de_fault (to_get_tib_address,
889 (int (*) (ptid_t, CORE_ADDR *))
891 de_fault (to_set_permissions,
894 de_fault (to_static_tracepoint_marker_at,
895 (int (*) (CORE_ADDR, struct static_tracepoint_marker *))
897 de_fault (to_static_tracepoint_markers_by_strid,
898 (VEC(static_tracepoint_marker_p) * (*) (const char *))
900 de_fault (to_traceframe_info,
901 (struct traceframe_info * (*) (void))
905 /* Finally, position the target-stack beneath the squashed
906 "current_target". That way code looking for a non-inherited
907 target method can quickly and simply find it. */
908 current_target.beneath = target_stack;
911 setup_target_debug ();
914 /* Push a new target type into the stack of the existing target accessors,
915 possibly superseding some of the existing accessors.
917 Rather than allow an empty stack, we always have the dummy target at
918 the bottom stratum, so we can call the function vectors without
922 push_target (struct target_ops *t)
924 struct target_ops **cur;
926 /* Check magic number. If wrong, it probably means someone changed
927 the struct definition, but not all the places that initialize one. */
928 if (t->to_magic != OPS_MAGIC)
930 fprintf_unfiltered (gdb_stderr,
931 "Magic number of %s target struct wrong\n",
933 internal_error (__FILE__, __LINE__,
934 _("failed internal consistency check"));
937 /* Find the proper stratum to install this target in. */
938 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
940 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
944 /* If there's already targets at this stratum, remove them. */
945 /* FIXME: cagney/2003-10-15: I think this should be popping all
946 targets to CUR, and not just those at this stratum level. */
947 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
949 /* There's already something at this stratum level. Close it,
950 and un-hook it from the stack. */
951 struct target_ops *tmp = (*cur);
953 (*cur) = (*cur)->beneath;
955 target_close (tmp, 0);
958 /* We have removed all targets in our stratum, now add the new one. */
962 update_current_target ();
965 /* Remove a target_ops vector from the stack, wherever it may be.
966 Return how many times it was removed (0 or 1). */
969 unpush_target (struct target_ops *t)
971 struct target_ops **cur;
972 struct target_ops *tmp;
974 if (t->to_stratum == dummy_stratum)
975 internal_error (__FILE__, __LINE__,
976 _("Attempt to unpush the dummy target"));
978 /* Look for the specified target. Note that we assume that a target
979 can only occur once in the target stack. */
981 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
988 return 0; /* Didn't find target_ops, quit now. */
990 /* NOTE: cagney/2003-12-06: In '94 the close call was made
991 unconditional by moving it to before the above check that the
992 target was in the target stack (something about "Change the way
993 pushing and popping of targets work to support target overlays
994 and inheritance"). This doesn't make much sense - only open
995 targets should be closed. */
998 /* Unchain the target. */
1000 (*cur) = (*cur)->beneath;
1001 tmp->beneath = NULL;
1003 update_current_target ();
1011 target_close (target_stack, 0); /* Let it clean up. */
1012 if (unpush_target (target_stack) == 1)
1015 fprintf_unfiltered (gdb_stderr,
1016 "pop_target couldn't find target %s\n",
1017 current_target.to_shortname);
1018 internal_error (__FILE__, __LINE__,
1019 _("failed internal consistency check"));
1023 pop_all_targets_above (enum strata above_stratum, int quitting)
1025 while ((int) (current_target.to_stratum) > (int) above_stratum)
1027 target_close (target_stack, quitting);
1028 if (!unpush_target (target_stack))
1030 fprintf_unfiltered (gdb_stderr,
1031 "pop_all_targets couldn't find target %s\n",
1032 target_stack->to_shortname);
1033 internal_error (__FILE__, __LINE__,
1034 _("failed internal consistency check"));
1041 pop_all_targets (int quitting)
1043 pop_all_targets_above (dummy_stratum, quitting);
1046 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
1049 target_is_pushed (struct target_ops *t)
1051 struct target_ops **cur;
1053 /* Check magic number. If wrong, it probably means someone changed
1054 the struct definition, but not all the places that initialize one. */
1055 if (t->to_magic != OPS_MAGIC)
1057 fprintf_unfiltered (gdb_stderr,
1058 "Magic number of %s target struct wrong\n",
1060 internal_error (__FILE__, __LINE__,
1061 _("failed internal consistency check"));
1064 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
1071 /* Using the objfile specified in OBJFILE, find the address for the
1072 current thread's thread-local storage with offset OFFSET. */
1074 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
1076 volatile CORE_ADDR addr = 0;
1077 struct target_ops *target;
1079 for (target = current_target.beneath;
1081 target = target->beneath)
1083 if (target->to_get_thread_local_address != NULL)
1088 && gdbarch_fetch_tls_load_module_address_p (target_gdbarch))
1090 ptid_t ptid = inferior_ptid;
1091 volatile struct gdb_exception ex;
1093 TRY_CATCH (ex, RETURN_MASK_ALL)
1097 /* Fetch the load module address for this objfile. */
1098 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch,
1100 /* If it's 0, throw the appropriate exception. */
1102 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
1103 _("TLS load module not found"));
1105 addr = target->to_get_thread_local_address (target, ptid,
1108 /* If an error occurred, print TLS related messages here. Otherwise,
1109 throw the error to some higher catcher. */
1112 int objfile_is_library = (objfile->flags & OBJF_SHARED);
1116 case TLS_NO_LIBRARY_SUPPORT_ERROR:
1117 error (_("Cannot find thread-local variables "
1118 "in this thread library."));
1120 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
1121 if (objfile_is_library)
1122 error (_("Cannot find shared library `%s' in dynamic"
1123 " linker's load module list"), objfile->name);
1125 error (_("Cannot find executable file `%s' in dynamic"
1126 " linker's load module list"), objfile->name);
1128 case TLS_NOT_ALLOCATED_YET_ERROR:
1129 if (objfile_is_library)
1130 error (_("The inferior has not yet allocated storage for"
1131 " thread-local variables in\n"
1132 "the shared library `%s'\n"
1134 objfile->name, target_pid_to_str (ptid));
1136 error (_("The inferior has not yet allocated storage for"
1137 " thread-local variables in\n"
1138 "the executable `%s'\n"
1140 objfile->name, target_pid_to_str (ptid));
1142 case TLS_GENERIC_ERROR:
1143 if (objfile_is_library)
1144 error (_("Cannot find thread-local storage for %s, "
1145 "shared library %s:\n%s"),
1146 target_pid_to_str (ptid),
1147 objfile->name, ex.message);
1149 error (_("Cannot find thread-local storage for %s, "
1150 "executable file %s:\n%s"),
1151 target_pid_to_str (ptid),
1152 objfile->name, ex.message);
1155 throw_exception (ex);
1160 /* It wouldn't be wrong here to try a gdbarch method, too; finding
1161 TLS is an ABI-specific thing. But we don't do that yet. */
1163 error (_("Cannot find thread-local variables on this target"));
1169 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
1171 /* target_read_string -- read a null terminated string, up to LEN bytes,
1172 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
1173 Set *STRING to a pointer to malloc'd memory containing the data; the caller
1174 is responsible for freeing it. Return the number of bytes successfully
1178 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1180 int tlen, origlen, offset, i;
1184 int buffer_allocated;
1186 unsigned int nbytes_read = 0;
1188 gdb_assert (string);
1190 /* Small for testing. */
1191 buffer_allocated = 4;
1192 buffer = xmalloc (buffer_allocated);
1199 tlen = MIN (len, 4 - (memaddr & 3));
1200 offset = memaddr & 3;
1202 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1205 /* The transfer request might have crossed the boundary to an
1206 unallocated region of memory. Retry the transfer, requesting
1210 errcode = target_read_memory (memaddr, buf, 1);
1215 if (bufptr - buffer + tlen > buffer_allocated)
1219 bytes = bufptr - buffer;
1220 buffer_allocated *= 2;
1221 buffer = xrealloc (buffer, buffer_allocated);
1222 bufptr = buffer + bytes;
1225 for (i = 0; i < tlen; i++)
1227 *bufptr++ = buf[i + offset];
1228 if (buf[i + offset] == '\000')
1230 nbytes_read += i + 1;
1237 nbytes_read += tlen;
1246 struct target_section_table *
1247 target_get_section_table (struct target_ops *target)
1249 struct target_ops *t;
1252 fprintf_unfiltered (gdb_stdlog, "target_get_section_table ()\n");
1254 for (t = target; t != NULL; t = t->beneath)
1255 if (t->to_get_section_table != NULL)
1256 return (*t->to_get_section_table) (t);
1261 /* Find a section containing ADDR. */
1263 struct target_section *
1264 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1266 struct target_section_table *table = target_get_section_table (target);
1267 struct target_section *secp;
1272 for (secp = table->sections; secp < table->sections_end; secp++)
1274 if (addr >= secp->addr && addr < secp->endaddr)
1280 /* Read memory from the live target, even if currently inspecting a
1281 traceframe. The return is the same as that of target_read. */
1284 target_read_live_memory (enum target_object object,
1285 ULONGEST memaddr, gdb_byte *myaddr, LONGEST len)
1288 struct cleanup *cleanup;
1290 /* Switch momentarily out of tfind mode so to access live memory.
1291 Note that this must not clear global state, such as the frame
1292 cache, which must still remain valid for the previous traceframe.
1293 We may be _building_ the frame cache at this point. */
1294 cleanup = make_cleanup_restore_traceframe_number ();
1295 set_traceframe_number (-1);
1297 ret = target_read (current_target.beneath, object, NULL,
1298 myaddr, memaddr, len);
1300 do_cleanups (cleanup);
1304 /* Using the set of read-only target sections of OPS, read live
1305 read-only memory. Note that the actual reads start from the
1306 top-most target again.
1308 For interface/parameters/return description see target.h,
1312 memory_xfer_live_readonly_partial (struct target_ops *ops,
1313 enum target_object object,
1314 gdb_byte *readbuf, ULONGEST memaddr,
1317 struct target_section *secp;
1318 struct target_section_table *table;
1320 secp = target_section_by_addr (ops, memaddr);
1322 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1325 struct target_section *p;
1326 ULONGEST memend = memaddr + len;
1328 table = target_get_section_table (ops);
1330 for (p = table->sections; p < table->sections_end; p++)
1332 if (memaddr >= p->addr)
1334 if (memend <= p->endaddr)
1336 /* Entire transfer is within this section. */
1337 return target_read_live_memory (object, memaddr,
1340 else if (memaddr >= p->endaddr)
1342 /* This section ends before the transfer starts. */
1347 /* This section overlaps the transfer. Just do half. */
1348 len = p->endaddr - memaddr;
1349 return target_read_live_memory (object, memaddr,
1359 /* Perform a partial memory transfer.
1360 For docs see target.h, to_xfer_partial. */
1363 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1364 void *readbuf, const void *writebuf, ULONGEST memaddr,
1369 struct mem_region *region;
1370 struct inferior *inf;
1372 /* Zero length requests are ok and require no work. */
1376 /* For accesses to unmapped overlay sections, read directly from
1377 files. Must do this first, as MEMADDR may need adjustment. */
1378 if (readbuf != NULL && overlay_debugging)
1380 struct obj_section *section = find_pc_overlay (memaddr);
1382 if (pc_in_unmapped_range (memaddr, section))
1384 struct target_section_table *table
1385 = target_get_section_table (ops);
1386 const char *section_name = section->the_bfd_section->name;
1388 memaddr = overlay_mapped_address (memaddr, section);
1389 return section_table_xfer_memory_partial (readbuf, writebuf,
1392 table->sections_end,
1397 /* Try the executable files, if "trust-readonly-sections" is set. */
1398 if (readbuf != NULL && trust_readonly)
1400 struct target_section *secp;
1401 struct target_section_table *table;
1403 secp = target_section_by_addr (ops, memaddr);
1405 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1408 table = target_get_section_table (ops);
1409 return section_table_xfer_memory_partial (readbuf, writebuf,
1412 table->sections_end,
1417 /* If reading unavailable memory in the context of traceframes, and
1418 this address falls within a read-only section, fallback to
1419 reading from live memory. */
1420 if (readbuf != NULL && get_traceframe_number () != -1)
1422 VEC(mem_range_s) *available;
1424 /* If we fail to get the set of available memory, then the
1425 target does not support querying traceframe info, and so we
1426 attempt reading from the traceframe anyway (assuming the
1427 target implements the old QTro packet then). */
1428 if (traceframe_available_memory (&available, memaddr, len))
1430 struct cleanup *old_chain;
1432 old_chain = make_cleanup (VEC_cleanup(mem_range_s), &available);
1434 if (VEC_empty (mem_range_s, available)
1435 || VEC_index (mem_range_s, available, 0)->start != memaddr)
1437 /* Don't read into the traceframe's available
1439 if (!VEC_empty (mem_range_s, available))
1441 LONGEST oldlen = len;
1443 len = VEC_index (mem_range_s, available, 0)->start - memaddr;
1444 gdb_assert (len <= oldlen);
1447 do_cleanups (old_chain);
1449 /* This goes through the topmost target again. */
1450 res = memory_xfer_live_readonly_partial (ops, object,
1451 readbuf, memaddr, len);
1455 /* No use trying further, we know some memory starting
1456 at MEMADDR isn't available. */
1460 /* Don't try to read more than how much is available, in
1461 case the target implements the deprecated QTro packet to
1462 cater for older GDBs (the target's knowledge of read-only
1463 sections may be outdated by now). */
1464 len = VEC_index (mem_range_s, available, 0)->length;
1466 do_cleanups (old_chain);
1470 /* Try GDB's internal data cache. */
1471 region = lookup_mem_region (memaddr);
1472 /* region->hi == 0 means there's no upper bound. */
1473 if (memaddr + len < region->hi || region->hi == 0)
1476 reg_len = region->hi - memaddr;
1478 switch (region->attrib.mode)
1481 if (writebuf != NULL)
1486 if (readbuf != NULL)
1491 /* We only support writing to flash during "load" for now. */
1492 if (writebuf != NULL)
1493 error (_("Writing to flash memory forbidden in this context"));
1500 if (!ptid_equal (inferior_ptid, null_ptid))
1501 inf = find_inferior_pid (ptid_get_pid (inferior_ptid));
1506 /* The dcache reads whole cache lines; that doesn't play well
1507 with reading from a trace buffer, because reading outside of
1508 the collected memory range fails. */
1509 && get_traceframe_number () == -1
1510 && (region->attrib.cache
1511 || (stack_cache_enabled_p && object == TARGET_OBJECT_STACK_MEMORY)))
1513 if (readbuf != NULL)
1514 res = dcache_xfer_memory (ops, target_dcache, memaddr, readbuf,
1517 /* FIXME drow/2006-08-09: If we're going to preserve const
1518 correctness dcache_xfer_memory should take readbuf and
1520 res = dcache_xfer_memory (ops, target_dcache, memaddr,
1527 if (readbuf && !show_memory_breakpoints)
1528 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1533 /* If none of those methods found the memory we wanted, fall back
1534 to a target partial transfer. Normally a single call to
1535 to_xfer_partial is enough; if it doesn't recognize an object
1536 it will call the to_xfer_partial of the next target down.
1537 But for memory this won't do. Memory is the only target
1538 object which can be read from more than one valid target.
1539 A core file, for instance, could have some of memory but
1540 delegate other bits to the target below it. So, we must
1541 manually try all targets. */
1545 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1546 readbuf, writebuf, memaddr, reg_len);
1550 /* We want to continue past core files to executables, but not
1551 past a running target's memory. */
1552 if (ops->to_has_all_memory (ops))
1557 while (ops != NULL);
1559 if (res > 0 && readbuf != NULL && !show_memory_breakpoints)
1560 breakpoint_restore_shadows (readbuf, memaddr, reg_len);
1562 /* Make sure the cache gets updated no matter what - if we are writing
1563 to the stack. Even if this write is not tagged as such, we still need
1564 to update the cache. */
1569 && !region->attrib.cache
1570 && stack_cache_enabled_p
1571 && object != TARGET_OBJECT_STACK_MEMORY)
1573 dcache_update (target_dcache, memaddr, (void *) writebuf, res);
1576 /* If we still haven't got anything, return the last error. We
1582 restore_show_memory_breakpoints (void *arg)
1584 show_memory_breakpoints = (uintptr_t) arg;
1588 make_show_memory_breakpoints_cleanup (int show)
1590 int current = show_memory_breakpoints;
1592 show_memory_breakpoints = show;
1593 return make_cleanup (restore_show_memory_breakpoints,
1594 (void *) (uintptr_t) current);
1597 /* For docs see target.h, to_xfer_partial. */
1600 target_xfer_partial (struct target_ops *ops,
1601 enum target_object object, const char *annex,
1602 void *readbuf, const void *writebuf,
1603 ULONGEST offset, LONGEST len)
1607 gdb_assert (ops->to_xfer_partial != NULL);
1609 if (writebuf && !may_write_memory)
1610 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1611 core_addr_to_string_nz (offset), plongest (len));
1613 /* If this is a memory transfer, let the memory-specific code
1614 have a look at it instead. Memory transfers are more
1616 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY)
1617 retval = memory_xfer_partial (ops, object, readbuf,
1618 writebuf, offset, len);
1621 enum target_object raw_object = object;
1623 /* If this is a raw memory transfer, request the normal
1624 memory object from other layers. */
1625 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1626 raw_object = TARGET_OBJECT_MEMORY;
1628 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1629 writebuf, offset, len);
1634 const unsigned char *myaddr = NULL;
1636 fprintf_unfiltered (gdb_stdlog,
1637 "%s:target_xfer_partial "
1638 "(%d, %s, %s, %s, %s, %s) = %s",
1641 (annex ? annex : "(null)"),
1642 host_address_to_string (readbuf),
1643 host_address_to_string (writebuf),
1644 core_addr_to_string_nz (offset),
1645 plongest (len), plongest (retval));
1651 if (retval > 0 && myaddr != NULL)
1655 fputs_unfiltered (", bytes =", gdb_stdlog);
1656 for (i = 0; i < retval; i++)
1658 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1660 if (targetdebug < 2 && i > 0)
1662 fprintf_unfiltered (gdb_stdlog, " ...");
1665 fprintf_unfiltered (gdb_stdlog, "\n");
1668 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1672 fputc_unfiltered ('\n', gdb_stdlog);
1677 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1678 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1679 if any error occurs.
1681 If an error occurs, no guarantee is made about the contents of the data at
1682 MYADDR. In particular, the caller should not depend upon partial reads
1683 filling the buffer with good data. There is no way for the caller to know
1684 how much good data might have been transfered anyway. Callers that can
1685 deal with partial reads should call target_read (which will retry until
1686 it makes no progress, and then return how much was transferred). */
1689 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1691 /* Dispatch to the topmost target, not the flattened current_target.
1692 Memory accesses check target->to_has_(all_)memory, and the
1693 flattened target doesn't inherit those. */
1694 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1695 myaddr, memaddr, len) == len)
1701 /* Like target_read_memory, but specify explicitly that this is a read from
1702 the target's stack. This may trigger different cache behavior. */
1705 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1707 /* Dispatch to the topmost target, not the flattened current_target.
1708 Memory accesses check target->to_has_(all_)memory, and the
1709 flattened target doesn't inherit those. */
1711 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1712 myaddr, memaddr, len) == len)
1718 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1719 Returns either 0 for success or an errno value if any error occurs.
1720 If an error occurs, no guarantee is made about how much data got written.
1721 Callers that can deal with partial writes should call target_write. */
1724 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1726 /* Dispatch to the topmost target, not the flattened current_target.
1727 Memory accesses check target->to_has_(all_)memory, and the
1728 flattened target doesn't inherit those. */
1729 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1730 myaddr, memaddr, len) == len)
1736 /* Fetch the target's memory map. */
1739 target_memory_map (void)
1741 VEC(mem_region_s) *result;
1742 struct mem_region *last_one, *this_one;
1744 struct target_ops *t;
1747 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1749 for (t = current_target.beneath; t != NULL; t = t->beneath)
1750 if (t->to_memory_map != NULL)
1756 result = t->to_memory_map (t);
1760 qsort (VEC_address (mem_region_s, result),
1761 VEC_length (mem_region_s, result),
1762 sizeof (struct mem_region), mem_region_cmp);
1764 /* Check that regions do not overlap. Simultaneously assign
1765 a numbering for the "mem" commands to use to refer to
1768 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1770 this_one->number = ix;
1772 if (last_one && last_one->hi > this_one->lo)
1774 warning (_("Overlapping regions in memory map: ignoring"));
1775 VEC_free (mem_region_s, result);
1778 last_one = this_one;
1785 target_flash_erase (ULONGEST address, LONGEST length)
1787 struct target_ops *t;
1789 for (t = current_target.beneath; t != NULL; t = t->beneath)
1790 if (t->to_flash_erase != NULL)
1793 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1794 hex_string (address), phex (length, 0));
1795 t->to_flash_erase (t, address, length);
1803 target_flash_done (void)
1805 struct target_ops *t;
1807 for (t = current_target.beneath; t != NULL; t = t->beneath)
1808 if (t->to_flash_done != NULL)
1811 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1812 t->to_flash_done (t);
1820 show_trust_readonly (struct ui_file *file, int from_tty,
1821 struct cmd_list_element *c, const char *value)
1823 fprintf_filtered (file,
1824 _("Mode for reading from readonly sections is %s.\n"),
1828 /* More generic transfers. */
1831 default_xfer_partial (struct target_ops *ops, enum target_object object,
1832 const char *annex, gdb_byte *readbuf,
1833 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1835 if (object == TARGET_OBJECT_MEMORY
1836 && ops->deprecated_xfer_memory != NULL)
1837 /* If available, fall back to the target's
1838 "deprecated_xfer_memory" method. */
1843 if (writebuf != NULL)
1845 void *buffer = xmalloc (len);
1846 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1848 memcpy (buffer, writebuf, len);
1849 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1850 1/*write*/, NULL, ops);
1851 do_cleanups (cleanup);
1853 if (readbuf != NULL)
1854 xfered = ops->deprecated_xfer_memory (offset, readbuf, len,
1855 0/*read*/, NULL, ops);
1858 else if (xfered == 0 && errno == 0)
1859 /* "deprecated_xfer_memory" uses 0, cross checked against
1860 ERRNO as one indication of an error. */
1865 else if (ops->beneath != NULL)
1866 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1867 readbuf, writebuf, offset, len);
1872 /* The xfer_partial handler for the topmost target. Unlike the default,
1873 it does not need to handle memory specially; it just passes all
1874 requests down the stack. */
1877 current_xfer_partial (struct target_ops *ops, enum target_object object,
1878 const char *annex, gdb_byte *readbuf,
1879 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1881 if (ops->beneath != NULL)
1882 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1883 readbuf, writebuf, offset, len);
1888 /* Target vector read/write partial wrapper functions. */
1891 target_read_partial (struct target_ops *ops,
1892 enum target_object object,
1893 const char *annex, gdb_byte *buf,
1894 ULONGEST offset, LONGEST len)
1896 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1900 target_write_partial (struct target_ops *ops,
1901 enum target_object object,
1902 const char *annex, const gdb_byte *buf,
1903 ULONGEST offset, LONGEST len)
1905 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1908 /* Wrappers to perform the full transfer. */
1910 /* For docs on target_read see target.h. */
1913 target_read (struct target_ops *ops,
1914 enum target_object object,
1915 const char *annex, gdb_byte *buf,
1916 ULONGEST offset, LONGEST len)
1920 while (xfered < len)
1922 LONGEST xfer = target_read_partial (ops, object, annex,
1923 (gdb_byte *) buf + xfered,
1924 offset + xfered, len - xfered);
1926 /* Call an observer, notifying them of the xfer progress? */
1937 /* Assuming that the entire [begin, end) range of memory cannot be
1938 read, try to read whatever subrange is possible to read.
1940 The function returns, in RESULT, either zero or one memory block.
1941 If there's a readable subrange at the beginning, it is completely
1942 read and returned. Any further readable subrange will not be read.
1943 Otherwise, if there's a readable subrange at the end, it will be
1944 completely read and returned. Any readable subranges before it
1945 (obviously, not starting at the beginning), will be ignored. In
1946 other cases -- either no readable subrange, or readable subrange(s)
1947 that is neither at the beginning, or end, nothing is returned.
1949 The purpose of this function is to handle a read across a boundary
1950 of accessible memory in a case when memory map is not available.
1951 The above restrictions are fine for this case, but will give
1952 incorrect results if the memory is 'patchy'. However, supporting
1953 'patchy' memory would require trying to read every single byte,
1954 and it seems unacceptable solution. Explicit memory map is
1955 recommended for this case -- and target_read_memory_robust will
1956 take care of reading multiple ranges then. */
1959 read_whatever_is_readable (struct target_ops *ops,
1960 ULONGEST begin, ULONGEST end,
1961 VEC(memory_read_result_s) **result)
1963 gdb_byte *buf = xmalloc (end - begin);
1964 ULONGEST current_begin = begin;
1965 ULONGEST current_end = end;
1967 memory_read_result_s r;
1969 /* If we previously failed to read 1 byte, nothing can be done here. */
1970 if (end - begin <= 1)
1976 /* Check that either first or the last byte is readable, and give up
1977 if not. This heuristic is meant to permit reading accessible memory
1978 at the boundary of accessible region. */
1979 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1980 buf, begin, 1) == 1)
1985 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1986 buf + (end-begin) - 1, end - 1, 1) == 1)
1997 /* Loop invariant is that the [current_begin, current_end) was previously
1998 found to be not readable as a whole.
2000 Note loop condition -- if the range has 1 byte, we can't divide the range
2001 so there's no point trying further. */
2002 while (current_end - current_begin > 1)
2004 ULONGEST first_half_begin, first_half_end;
2005 ULONGEST second_half_begin, second_half_end;
2007 ULONGEST middle = current_begin + (current_end - current_begin)/2;
2011 first_half_begin = current_begin;
2012 first_half_end = middle;
2013 second_half_begin = middle;
2014 second_half_end = current_end;
2018 first_half_begin = middle;
2019 first_half_end = current_end;
2020 second_half_begin = current_begin;
2021 second_half_end = middle;
2024 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2025 buf + (first_half_begin - begin),
2027 first_half_end - first_half_begin);
2029 if (xfer == first_half_end - first_half_begin)
2031 /* This half reads up fine. So, the error must be in the
2033 current_begin = second_half_begin;
2034 current_end = second_half_end;
2038 /* This half is not readable. Because we've tried one byte, we
2039 know some part of this half if actually redable. Go to the next
2040 iteration to divide again and try to read.
2042 We don't handle the other half, because this function only tries
2043 to read a single readable subrange. */
2044 current_begin = first_half_begin;
2045 current_end = first_half_end;
2051 /* The [begin, current_begin) range has been read. */
2053 r.end = current_begin;
2058 /* The [current_end, end) range has been read. */
2059 LONGEST rlen = end - current_end;
2061 r.data = xmalloc (rlen);
2062 memcpy (r.data, buf + current_end - begin, rlen);
2063 r.begin = current_end;
2067 VEC_safe_push(memory_read_result_s, (*result), &r);
2071 free_memory_read_result_vector (void *x)
2073 VEC(memory_read_result_s) *v = x;
2074 memory_read_result_s *current;
2077 for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix)
2079 xfree (current->data);
2081 VEC_free (memory_read_result_s, v);
2084 VEC(memory_read_result_s) *
2085 read_memory_robust (struct target_ops *ops, ULONGEST offset, LONGEST len)
2087 VEC(memory_read_result_s) *result = 0;
2090 while (xfered < len)
2092 struct mem_region *region = lookup_mem_region (offset + xfered);
2095 /* If there is no explicit region, a fake one should be created. */
2096 gdb_assert (region);
2098 if (region->hi == 0)
2099 rlen = len - xfered;
2101 rlen = region->hi - offset;
2103 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
2105 /* Cannot read this region. Note that we can end up here only
2106 if the region is explicitly marked inaccessible, or
2107 'inaccessible-by-default' is in effect. */
2112 LONGEST to_read = min (len - xfered, rlen);
2113 gdb_byte *buffer = (gdb_byte *)xmalloc (to_read);
2115 LONGEST xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2116 (gdb_byte *) buffer,
2117 offset + xfered, to_read);
2118 /* Call an observer, notifying them of the xfer progress? */
2121 /* Got an error reading full chunk. See if maybe we can read
2124 read_whatever_is_readable (ops, offset + xfered,
2125 offset + xfered + to_read, &result);
2130 struct memory_read_result r;
2132 r.begin = offset + xfered;
2133 r.end = r.begin + xfer;
2134 VEC_safe_push (memory_read_result_s, result, &r);
2144 /* An alternative to target_write with progress callbacks. */
2147 target_write_with_progress (struct target_ops *ops,
2148 enum target_object object,
2149 const char *annex, const gdb_byte *buf,
2150 ULONGEST offset, LONGEST len,
2151 void (*progress) (ULONGEST, void *), void *baton)
2155 /* Give the progress callback a chance to set up. */
2157 (*progress) (0, baton);
2159 while (xfered < len)
2161 LONGEST xfer = target_write_partial (ops, object, annex,
2162 (gdb_byte *) buf + xfered,
2163 offset + xfered, len - xfered);
2171 (*progress) (xfer, baton);
2179 /* For docs on target_write see target.h. */
2182 target_write (struct target_ops *ops,
2183 enum target_object object,
2184 const char *annex, const gdb_byte *buf,
2185 ULONGEST offset, LONGEST len)
2187 return target_write_with_progress (ops, object, annex, buf, offset, len,
2191 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2192 the size of the transferred data. PADDING additional bytes are
2193 available in *BUF_P. This is a helper function for
2194 target_read_alloc; see the declaration of that function for more
2198 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
2199 const char *annex, gdb_byte **buf_p, int padding)
2201 size_t buf_alloc, buf_pos;
2205 /* This function does not have a length parameter; it reads the
2206 entire OBJECT). Also, it doesn't support objects fetched partly
2207 from one target and partly from another (in a different stratum,
2208 e.g. a core file and an executable). Both reasons make it
2209 unsuitable for reading memory. */
2210 gdb_assert (object != TARGET_OBJECT_MEMORY);
2212 /* Start by reading up to 4K at a time. The target will throttle
2213 this number down if necessary. */
2215 buf = xmalloc (buf_alloc);
2219 n = target_read_partial (ops, object, annex, &buf[buf_pos],
2220 buf_pos, buf_alloc - buf_pos - padding);
2223 /* An error occurred. */
2229 /* Read all there was. */
2239 /* If the buffer is filling up, expand it. */
2240 if (buf_alloc < buf_pos * 2)
2243 buf = xrealloc (buf, buf_alloc);
2250 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2251 the size of the transferred data. See the declaration in "target.h"
2252 function for more information about the return value. */
2255 target_read_alloc (struct target_ops *ops, enum target_object object,
2256 const char *annex, gdb_byte **buf_p)
2258 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2261 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
2262 returned as a string, allocated using xmalloc. If an error occurs
2263 or the transfer is unsupported, NULL is returned. Empty objects
2264 are returned as allocated but empty strings. A warning is issued
2265 if the result contains any embedded NUL bytes. */
2268 target_read_stralloc (struct target_ops *ops, enum target_object object,
2272 LONGEST transferred;
2274 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2276 if (transferred < 0)
2279 if (transferred == 0)
2280 return xstrdup ("");
2282 buffer[transferred] = 0;
2283 if (strlen (buffer) < transferred)
2284 warning (_("target object %d, annex %s, "
2285 "contained unexpected null characters"),
2286 (int) object, annex ? annex : "(none)");
2288 return (char *) buffer;
2291 /* Memory transfer methods. */
2294 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2297 /* This method is used to read from an alternate, non-current
2298 target. This read must bypass the overlay support (as symbols
2299 don't match this target), and GDB's internal cache (wrong cache
2300 for this target). */
2301 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2303 memory_error (EIO, addr);
2307 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2308 int len, enum bfd_endian byte_order)
2310 gdb_byte buf[sizeof (ULONGEST)];
2312 gdb_assert (len <= sizeof (buf));
2313 get_target_memory (ops, addr, buf, len);
2314 return extract_unsigned_integer (buf, len, byte_order);
2318 target_insert_breakpoint (struct gdbarch *gdbarch,
2319 struct bp_target_info *bp_tgt)
2321 if (!may_insert_breakpoints)
2323 warning (_("May not insert breakpoints"));
2327 return (*current_target.to_insert_breakpoint) (gdbarch, bp_tgt);
2331 target_remove_breakpoint (struct gdbarch *gdbarch,
2332 struct bp_target_info *bp_tgt)
2334 /* This is kind of a weird case to handle, but the permission might
2335 have been changed after breakpoints were inserted - in which case
2336 we should just take the user literally and assume that any
2337 breakpoints should be left in place. */
2338 if (!may_insert_breakpoints)
2340 warning (_("May not remove breakpoints"));
2344 return (*current_target.to_remove_breakpoint) (gdbarch, bp_tgt);
2348 target_info (char *args, int from_tty)
2350 struct target_ops *t;
2351 int has_all_mem = 0;
2353 if (symfile_objfile != NULL)
2354 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
2356 for (t = target_stack; t != NULL; t = t->beneath)
2358 if (!(*t->to_has_memory) (t))
2361 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2364 printf_unfiltered (_("\tWhile running this, "
2365 "GDB does not access memory from...\n"));
2366 printf_unfiltered ("%s:\n", t->to_longname);
2367 (t->to_files_info) (t);
2368 has_all_mem = (*t->to_has_all_memory) (t);
2372 /* This function is called before any new inferior is created, e.g.
2373 by running a program, attaching, or connecting to a target.
2374 It cleans up any state from previous invocations which might
2375 change between runs. This is a subset of what target_preopen
2376 resets (things which might change between targets). */
2379 target_pre_inferior (int from_tty)
2381 /* Clear out solib state. Otherwise the solib state of the previous
2382 inferior might have survived and is entirely wrong for the new
2383 target. This has been observed on GNU/Linux using glibc 2.3. How
2395 Cannot access memory at address 0xdeadbeef
2398 /* In some OSs, the shared library list is the same/global/shared
2399 across inferiors. If code is shared between processes, so are
2400 memory regions and features. */
2401 if (!gdbarch_has_global_solist (target_gdbarch))
2403 no_shared_libraries (NULL, from_tty);
2405 invalidate_target_mem_regions ();
2407 target_clear_description ();
2411 /* Callback for iterate_over_inferiors. Gets rid of the given
2415 dispose_inferior (struct inferior *inf, void *args)
2417 struct thread_info *thread;
2419 thread = any_thread_of_process (inf->pid);
2422 switch_to_thread (thread->ptid);
2424 /* Core inferiors actually should be detached, not killed. */
2425 if (target_has_execution)
2428 target_detach (NULL, 0);
2434 /* This is to be called by the open routine before it does
2438 target_preopen (int from_tty)
2442 if (have_inferiors ())
2445 || !have_live_inferiors ()
2446 || query (_("A program is being debugged already. Kill it? ")))
2447 iterate_over_inferiors (dispose_inferior, NULL);
2449 error (_("Program not killed."));
2452 /* Calling target_kill may remove the target from the stack. But if
2453 it doesn't (which seems like a win for UDI), remove it now. */
2454 /* Leave the exec target, though. The user may be switching from a
2455 live process to a core of the same program. */
2456 pop_all_targets_above (file_stratum, 0);
2458 target_pre_inferior (from_tty);
2461 /* Detach a target after doing deferred register stores. */
2464 target_detach (char *args, int from_tty)
2466 struct target_ops* t;
2468 if (gdbarch_has_global_breakpoints (target_gdbarch))
2469 /* Don't remove global breakpoints here. They're removed on
2470 disconnection from the target. */
2473 /* If we're in breakpoints-always-inserted mode, have to remove
2474 them before detaching. */
2475 remove_breakpoints_pid (PIDGET (inferior_ptid));
2477 prepare_for_detach ();
2479 for (t = current_target.beneath; t != NULL; t = t->beneath)
2481 if (t->to_detach != NULL)
2483 t->to_detach (t, args, from_tty);
2485 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n",
2491 internal_error (__FILE__, __LINE__, _("could not find a target to detach"));
2495 target_disconnect (char *args, int from_tty)
2497 struct target_ops *t;
2499 /* If we're in breakpoints-always-inserted mode or if breakpoints
2500 are global across processes, we have to remove them before
2502 remove_breakpoints ();
2504 for (t = current_target.beneath; t != NULL; t = t->beneath)
2505 if (t->to_disconnect != NULL)
2508 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
2510 t->to_disconnect (t, args, from_tty);
2518 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2520 struct target_ops *t;
2522 for (t = current_target.beneath; t != NULL; t = t->beneath)
2524 if (t->to_wait != NULL)
2526 ptid_t retval = (*t->to_wait) (t, ptid, status, options);
2530 char *status_string;
2532 status_string = target_waitstatus_to_string (status);
2533 fprintf_unfiltered (gdb_stdlog,
2534 "target_wait (%d, status) = %d, %s\n",
2535 PIDGET (ptid), PIDGET (retval),
2537 xfree (status_string);
2548 target_pid_to_str (ptid_t ptid)
2550 struct target_ops *t;
2552 for (t = current_target.beneath; t != NULL; t = t->beneath)
2554 if (t->to_pid_to_str != NULL)
2555 return (*t->to_pid_to_str) (t, ptid);
2558 return normal_pid_to_str (ptid);
2562 target_thread_name (struct thread_info *info)
2564 struct target_ops *t;
2566 for (t = current_target.beneath; t != NULL; t = t->beneath)
2568 if (t->to_thread_name != NULL)
2569 return (*t->to_thread_name) (info);
2576 target_resume (ptid_t ptid, int step, enum target_signal signal)
2578 struct target_ops *t;
2580 target_dcache_invalidate ();
2582 for (t = current_target.beneath; t != NULL; t = t->beneath)
2584 if (t->to_resume != NULL)
2586 t->to_resume (t, ptid, step, signal);
2588 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n",
2590 step ? "step" : "continue",
2591 target_signal_to_name (signal));
2593 registers_changed_ptid (ptid);
2594 set_executing (ptid, 1);
2595 set_running (ptid, 1);
2596 clear_inline_frame_state (ptid);
2603 /* Look through the list of possible targets for a target that can
2607 target_follow_fork (int follow_child)
2609 struct target_ops *t;
2611 for (t = current_target.beneath; t != NULL; t = t->beneath)
2613 if (t->to_follow_fork != NULL)
2615 int retval = t->to_follow_fork (t, follow_child);
2618 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
2619 follow_child, retval);
2624 /* Some target returned a fork event, but did not know how to follow it. */
2625 internal_error (__FILE__, __LINE__,
2626 _("could not find a target to follow fork"));
2630 target_mourn_inferior (void)
2632 struct target_ops *t;
2634 for (t = current_target.beneath; t != NULL; t = t->beneath)
2636 if (t->to_mourn_inferior != NULL)
2638 t->to_mourn_inferior (t);
2640 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2642 /* We no longer need to keep handles on any of the object files.
2643 Make sure to release them to avoid unnecessarily locking any
2644 of them while we're not actually debugging. */
2645 bfd_cache_close_all ();
2651 internal_error (__FILE__, __LINE__,
2652 _("could not find a target to follow mourn inferior"));
2655 /* Look for a target which can describe architectural features, starting
2656 from TARGET. If we find one, return its description. */
2658 const struct target_desc *
2659 target_read_description (struct target_ops *target)
2661 struct target_ops *t;
2663 for (t = target; t != NULL; t = t->beneath)
2664 if (t->to_read_description != NULL)
2666 const struct target_desc *tdesc;
2668 tdesc = t->to_read_description (t);
2676 /* The default implementation of to_search_memory.
2677 This implements a basic search of memory, reading target memory and
2678 performing the search here (as opposed to performing the search in on the
2679 target side with, for example, gdbserver). */
2682 simple_search_memory (struct target_ops *ops,
2683 CORE_ADDR start_addr, ULONGEST search_space_len,
2684 const gdb_byte *pattern, ULONGEST pattern_len,
2685 CORE_ADDR *found_addrp)
2687 /* NOTE: also defined in find.c testcase. */
2688 #define SEARCH_CHUNK_SIZE 16000
2689 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2690 /* Buffer to hold memory contents for searching. */
2691 gdb_byte *search_buf;
2692 unsigned search_buf_size;
2693 struct cleanup *old_cleanups;
2695 search_buf_size = chunk_size + pattern_len - 1;
2697 /* No point in trying to allocate a buffer larger than the search space. */
2698 if (search_space_len < search_buf_size)
2699 search_buf_size = search_space_len;
2701 search_buf = malloc (search_buf_size);
2702 if (search_buf == NULL)
2703 error (_("Unable to allocate memory to perform the search."));
2704 old_cleanups = make_cleanup (free_current_contents, &search_buf);
2706 /* Prime the search buffer. */
2708 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2709 search_buf, start_addr, search_buf_size) != search_buf_size)
2711 warning (_("Unable to access target memory at %s, halting search."),
2712 hex_string (start_addr));
2713 do_cleanups (old_cleanups);
2717 /* Perform the search.
2719 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2720 When we've scanned N bytes we copy the trailing bytes to the start and
2721 read in another N bytes. */
2723 while (search_space_len >= pattern_len)
2725 gdb_byte *found_ptr;
2726 unsigned nr_search_bytes = min (search_space_len, search_buf_size);
2728 found_ptr = memmem (search_buf, nr_search_bytes,
2729 pattern, pattern_len);
2731 if (found_ptr != NULL)
2733 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf);
2735 *found_addrp = found_addr;
2736 do_cleanups (old_cleanups);
2740 /* Not found in this chunk, skip to next chunk. */
2742 /* Don't let search_space_len wrap here, it's unsigned. */
2743 if (search_space_len >= chunk_size)
2744 search_space_len -= chunk_size;
2746 search_space_len = 0;
2748 if (search_space_len >= pattern_len)
2750 unsigned keep_len = search_buf_size - chunk_size;
2751 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2754 /* Copy the trailing part of the previous iteration to the front
2755 of the buffer for the next iteration. */
2756 gdb_assert (keep_len == pattern_len - 1);
2757 memcpy (search_buf, search_buf + chunk_size, keep_len);
2759 nr_to_read = min (search_space_len - keep_len, chunk_size);
2761 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2762 search_buf + keep_len, read_addr,
2763 nr_to_read) != nr_to_read)
2765 warning (_("Unable to access target "
2766 "memory at %s, halting search."),
2767 hex_string (read_addr));
2768 do_cleanups (old_cleanups);
2772 start_addr += chunk_size;
2778 do_cleanups (old_cleanups);
2782 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2783 sequence of bytes in PATTERN with length PATTERN_LEN.
2785 The result is 1 if found, 0 if not found, and -1 if there was an error
2786 requiring halting of the search (e.g. memory read error).
2787 If the pattern is found the address is recorded in FOUND_ADDRP. */
2790 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2791 const gdb_byte *pattern, ULONGEST pattern_len,
2792 CORE_ADDR *found_addrp)
2794 struct target_ops *t;
2797 /* We don't use INHERIT to set current_target.to_search_memory,
2798 so we have to scan the target stack and handle targetdebug
2802 fprintf_unfiltered (gdb_stdlog, "target_search_memory (%s, ...)\n",
2803 hex_string (start_addr));
2805 for (t = current_target.beneath; t != NULL; t = t->beneath)
2806 if (t->to_search_memory != NULL)
2811 found = t->to_search_memory (t, start_addr, search_space_len,
2812 pattern, pattern_len, found_addrp);
2816 /* If a special version of to_search_memory isn't available, use the
2818 found = simple_search_memory (current_target.beneath,
2819 start_addr, search_space_len,
2820 pattern, pattern_len, found_addrp);
2824 fprintf_unfiltered (gdb_stdlog, " = %d\n", found);
2829 /* Look through the currently pushed targets. If none of them will
2830 be able to restart the currently running process, issue an error
2834 target_require_runnable (void)
2836 struct target_ops *t;
2838 for (t = target_stack; t != NULL; t = t->beneath)
2840 /* If this target knows how to create a new program, then
2841 assume we will still be able to after killing the current
2842 one. Either killing and mourning will not pop T, or else
2843 find_default_run_target will find it again. */
2844 if (t->to_create_inferior != NULL)
2847 /* Do not worry about thread_stratum targets that can not
2848 create inferiors. Assume they will be pushed again if
2849 necessary, and continue to the process_stratum. */
2850 if (t->to_stratum == thread_stratum
2851 || t->to_stratum == arch_stratum)
2854 error (_("The \"%s\" target does not support \"run\". "
2855 "Try \"help target\" or \"continue\"."),
2859 /* This function is only called if the target is running. In that
2860 case there should have been a process_stratum target and it
2861 should either know how to create inferiors, or not... */
2862 internal_error (__FILE__, __LINE__, _("No targets found"));
2865 /* Look through the list of possible targets for a target that can
2866 execute a run or attach command without any other data. This is
2867 used to locate the default process stratum.
2869 If DO_MESG is not NULL, the result is always valid (error() is
2870 called for errors); else, return NULL on error. */
2872 static struct target_ops *
2873 find_default_run_target (char *do_mesg)
2875 struct target_ops **t;
2876 struct target_ops *runable = NULL;
2881 for (t = target_structs; t < target_structs + target_struct_size;
2884 if ((*t)->to_can_run && target_can_run (*t))
2894 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2903 find_default_attach (struct target_ops *ops, char *args, int from_tty)
2905 struct target_ops *t;
2907 t = find_default_run_target ("attach");
2908 (t->to_attach) (t, args, from_tty);
2913 find_default_create_inferior (struct target_ops *ops,
2914 char *exec_file, char *allargs, char **env,
2917 struct target_ops *t;
2919 t = find_default_run_target ("run");
2920 (t->to_create_inferior) (t, exec_file, allargs, env, from_tty);
2925 find_default_can_async_p (void)
2927 struct target_ops *t;
2929 /* This may be called before the target is pushed on the stack;
2930 look for the default process stratum. If there's none, gdb isn't
2931 configured with a native debugger, and target remote isn't
2933 t = find_default_run_target (NULL);
2934 if (t && t->to_can_async_p)
2935 return (t->to_can_async_p) ();
2940 find_default_is_async_p (void)
2942 struct target_ops *t;
2944 /* This may be called before the target is pushed on the stack;
2945 look for the default process stratum. If there's none, gdb isn't
2946 configured with a native debugger, and target remote isn't
2948 t = find_default_run_target (NULL);
2949 if (t && t->to_is_async_p)
2950 return (t->to_is_async_p) ();
2955 find_default_supports_non_stop (void)
2957 struct target_ops *t;
2959 t = find_default_run_target (NULL);
2960 if (t && t->to_supports_non_stop)
2961 return (t->to_supports_non_stop) ();
2966 target_supports_non_stop (void)
2968 struct target_ops *t;
2970 for (t = ¤t_target; t != NULL; t = t->beneath)
2971 if (t->to_supports_non_stop)
2972 return t->to_supports_non_stop ();
2979 target_get_osdata (const char *type)
2981 struct target_ops *t;
2983 /* If we're already connected to something that can get us OS
2984 related data, use it. Otherwise, try using the native
2986 if (current_target.to_stratum >= process_stratum)
2987 t = current_target.beneath;
2989 t = find_default_run_target ("get OS data");
2994 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2997 /* Determine the current address space of thread PTID. */
2999 struct address_space *
3000 target_thread_address_space (ptid_t ptid)
3002 struct address_space *aspace;
3003 struct inferior *inf;
3004 struct target_ops *t;
3006 for (t = current_target.beneath; t != NULL; t = t->beneath)
3008 if (t->to_thread_address_space != NULL)
3010 aspace = t->to_thread_address_space (t, ptid);
3011 gdb_assert (aspace);
3014 fprintf_unfiltered (gdb_stdlog,
3015 "target_thread_address_space (%s) = %d\n",
3016 target_pid_to_str (ptid),
3017 address_space_num (aspace));
3022 /* Fall-back to the "main" address space of the inferior. */
3023 inf = find_inferior_pid (ptid_get_pid (ptid));
3025 if (inf == NULL || inf->aspace == NULL)
3026 internal_error (__FILE__, __LINE__,
3027 _("Can't determine the current "
3028 "address space of thread %s\n"),
3029 target_pid_to_str (ptid));
3035 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3037 return (len <= gdbarch_ptr_bit (target_gdbarch) / TARGET_CHAR_BIT);
3041 default_watchpoint_addr_within_range (struct target_ops *target,
3043 CORE_ADDR start, int length)
3045 return addr >= start && addr < start + length;
3048 static struct gdbarch *
3049 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3051 return target_gdbarch;
3067 return_minus_one (void)
3072 /* Find a single runnable target in the stack and return it. If for
3073 some reason there is more than one, return NULL. */
3076 find_run_target (void)
3078 struct target_ops **t;
3079 struct target_ops *runable = NULL;
3084 for (t = target_structs; t < target_structs + target_struct_size; ++t)
3086 if ((*t)->to_can_run && target_can_run (*t))
3093 return (count == 1 ? runable : NULL);
3097 * Find the next target down the stack from the specified target.
3101 find_target_beneath (struct target_ops *t)
3107 /* The inferior process has died. Long live the inferior! */
3110 generic_mourn_inferior (void)
3114 ptid = inferior_ptid;
3115 inferior_ptid = null_ptid;
3117 if (!ptid_equal (ptid, null_ptid))
3119 int pid = ptid_get_pid (ptid);
3120 exit_inferior (pid);
3123 breakpoint_init_inferior (inf_exited);
3124 registers_changed ();
3126 reopen_exec_file ();
3127 reinit_frame_cache ();
3129 if (deprecated_detach_hook)
3130 deprecated_detach_hook ();
3133 /* Helper function for child_wait and the derivatives of child_wait.
3134 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
3135 translation of that in OURSTATUS. */
3137 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
3139 if (WIFEXITED (hoststatus))
3141 ourstatus->kind = TARGET_WAITKIND_EXITED;
3142 ourstatus->value.integer = WEXITSTATUS (hoststatus);
3144 else if (!WIFSTOPPED (hoststatus))
3146 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
3147 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
3151 ourstatus->kind = TARGET_WAITKIND_STOPPED;
3152 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
3156 /* Convert a normal process ID to a string. Returns the string in a
3160 normal_pid_to_str (ptid_t ptid)
3162 static char buf[32];
3164 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3169 dummy_pid_to_str (struct target_ops *ops, ptid_t ptid)
3171 return normal_pid_to_str (ptid);
3174 /* Error-catcher for target_find_memory_regions. */
3176 dummy_find_memory_regions (find_memory_region_ftype ignore1, void *ignore2)
3178 error (_("Command not implemented for this target."));
3182 /* Error-catcher for target_make_corefile_notes. */
3184 dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
3186 error (_("Command not implemented for this target."));
3190 /* Error-catcher for target_get_bookmark. */
3192 dummy_get_bookmark (char *ignore1, int ignore2)
3198 /* Error-catcher for target_goto_bookmark. */
3200 dummy_goto_bookmark (gdb_byte *ignore, int from_tty)
3205 /* Set up the handful of non-empty slots needed by the dummy target
3209 init_dummy_target (void)
3211 dummy_target.to_shortname = "None";
3212 dummy_target.to_longname = "None";
3213 dummy_target.to_doc = "";
3214 dummy_target.to_attach = find_default_attach;
3215 dummy_target.to_detach =
3216 (void (*)(struct target_ops *, char *, int))target_ignore;
3217 dummy_target.to_create_inferior = find_default_create_inferior;
3218 dummy_target.to_can_async_p = find_default_can_async_p;
3219 dummy_target.to_is_async_p = find_default_is_async_p;
3220 dummy_target.to_supports_non_stop = find_default_supports_non_stop;
3221 dummy_target.to_pid_to_str = dummy_pid_to_str;
3222 dummy_target.to_stratum = dummy_stratum;
3223 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
3224 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
3225 dummy_target.to_get_bookmark = dummy_get_bookmark;
3226 dummy_target.to_goto_bookmark = dummy_goto_bookmark;
3227 dummy_target.to_xfer_partial = default_xfer_partial;
3228 dummy_target.to_has_all_memory = (int (*) (struct target_ops *)) return_zero;
3229 dummy_target.to_has_memory = (int (*) (struct target_ops *)) return_zero;
3230 dummy_target.to_has_stack = (int (*) (struct target_ops *)) return_zero;
3231 dummy_target.to_has_registers = (int (*) (struct target_ops *)) return_zero;
3232 dummy_target.to_has_execution
3233 = (int (*) (struct target_ops *, ptid_t)) return_zero;
3234 dummy_target.to_stopped_by_watchpoint = return_zero;
3235 dummy_target.to_stopped_data_address =
3236 (int (*) (struct target_ops *, CORE_ADDR *)) return_zero;
3237 dummy_target.to_magic = OPS_MAGIC;
3241 debug_to_open (char *args, int from_tty)
3243 debug_target.to_open (args, from_tty);
3245 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
3249 target_close (struct target_ops *targ, int quitting)
3251 if (targ->to_xclose != NULL)
3252 targ->to_xclose (targ, quitting);
3253 else if (targ->to_close != NULL)
3254 targ->to_close (quitting);
3257 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
3261 target_attach (char *args, int from_tty)
3263 struct target_ops *t;
3265 for (t = current_target.beneath; t != NULL; t = t->beneath)
3267 if (t->to_attach != NULL)
3269 t->to_attach (t, args, from_tty);
3271 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n",
3277 internal_error (__FILE__, __LINE__,
3278 _("could not find a target to attach"));
3282 target_thread_alive (ptid_t ptid)
3284 struct target_ops *t;
3286 for (t = current_target.beneath; t != NULL; t = t->beneath)
3288 if (t->to_thread_alive != NULL)
3292 retval = t->to_thread_alive (t, ptid);
3294 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
3295 PIDGET (ptid), retval);
3305 target_find_new_threads (void)
3307 struct target_ops *t;
3309 for (t = current_target.beneath; t != NULL; t = t->beneath)
3311 if (t->to_find_new_threads != NULL)
3313 t->to_find_new_threads (t);
3315 fprintf_unfiltered (gdb_stdlog, "target_find_new_threads ()\n");
3323 target_stop (ptid_t ptid)
3327 warning (_("May not interrupt or stop the target, ignoring attempt"));
3331 (*current_target.to_stop) (ptid);
3335 debug_to_post_attach (int pid)
3337 debug_target.to_post_attach (pid);
3339 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
3342 /* Return a pretty printed form of target_waitstatus.
3343 Space for the result is malloc'd, caller must free. */
3346 target_waitstatus_to_string (const struct target_waitstatus *ws)
3348 const char *kind_str = "status->kind = ";
3352 case TARGET_WAITKIND_EXITED:
3353 return xstrprintf ("%sexited, status = %d",
3354 kind_str, ws->value.integer);
3355 case TARGET_WAITKIND_STOPPED:
3356 return xstrprintf ("%sstopped, signal = %s",
3357 kind_str, target_signal_to_name (ws->value.sig));
3358 case TARGET_WAITKIND_SIGNALLED:
3359 return xstrprintf ("%ssignalled, signal = %s",
3360 kind_str, target_signal_to_name (ws->value.sig));
3361 case TARGET_WAITKIND_LOADED:
3362 return xstrprintf ("%sloaded", kind_str);
3363 case TARGET_WAITKIND_FORKED:
3364 return xstrprintf ("%sforked", kind_str);
3365 case TARGET_WAITKIND_VFORKED:
3366 return xstrprintf ("%svforked", kind_str);
3367 case TARGET_WAITKIND_EXECD:
3368 return xstrprintf ("%sexecd", kind_str);
3369 case TARGET_WAITKIND_SYSCALL_ENTRY:
3370 return xstrprintf ("%sentered syscall", kind_str);
3371 case TARGET_WAITKIND_SYSCALL_RETURN:
3372 return xstrprintf ("%sexited syscall", kind_str);
3373 case TARGET_WAITKIND_SPURIOUS:
3374 return xstrprintf ("%sspurious", kind_str);
3375 case TARGET_WAITKIND_IGNORE:
3376 return xstrprintf ("%signore", kind_str);
3377 case TARGET_WAITKIND_NO_HISTORY:
3378 return xstrprintf ("%sno-history", kind_str);
3380 return xstrprintf ("%sunknown???", kind_str);
3385 debug_print_register (const char * func,
3386 struct regcache *regcache, int regno)
3388 struct gdbarch *gdbarch = get_regcache_arch (regcache);
3390 fprintf_unfiltered (gdb_stdlog, "%s ", func);
3391 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)
3392 && gdbarch_register_name (gdbarch, regno) != NULL
3393 && gdbarch_register_name (gdbarch, regno)[0] != '\0')
3394 fprintf_unfiltered (gdb_stdlog, "(%s)",
3395 gdbarch_register_name (gdbarch, regno));
3397 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
3398 if (regno >= 0 && regno < gdbarch_num_regs (gdbarch))
3400 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
3401 int i, size = register_size (gdbarch, regno);
3402 unsigned char buf[MAX_REGISTER_SIZE];
3404 regcache_raw_collect (regcache, regno, buf);
3405 fprintf_unfiltered (gdb_stdlog, " = ");
3406 for (i = 0; i < size; i++)
3408 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
3410 if (size <= sizeof (LONGEST))
3412 ULONGEST val = extract_unsigned_integer (buf, size, byte_order);
3414 fprintf_unfiltered (gdb_stdlog, " %s %s",
3415 core_addr_to_string_nz (val), plongest (val));
3418 fprintf_unfiltered (gdb_stdlog, "\n");
3422 target_fetch_registers (struct regcache *regcache, int regno)
3424 struct target_ops *t;
3426 for (t = current_target.beneath; t != NULL; t = t->beneath)
3428 if (t->to_fetch_registers != NULL)
3430 t->to_fetch_registers (t, regcache, regno);
3432 debug_print_register ("target_fetch_registers", regcache, regno);
3439 target_store_registers (struct regcache *regcache, int regno)
3441 struct target_ops *t;
3443 if (!may_write_registers)
3444 error (_("Writing to registers is not allowed (regno %d)"), regno);
3446 for (t = current_target.beneath; t != NULL; t = t->beneath)
3448 if (t->to_store_registers != NULL)
3450 t->to_store_registers (t, regcache, regno);
3453 debug_print_register ("target_store_registers", regcache, regno);
3463 target_core_of_thread (ptid_t ptid)
3465 struct target_ops *t;
3467 for (t = current_target.beneath; t != NULL; t = t->beneath)
3469 if (t->to_core_of_thread != NULL)
3471 int retval = t->to_core_of_thread (t, ptid);
3474 fprintf_unfiltered (gdb_stdlog,
3475 "target_core_of_thread (%d) = %d\n",
3476 PIDGET (ptid), retval);
3485 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3487 struct target_ops *t;
3489 for (t = current_target.beneath; t != NULL; t = t->beneath)
3491 if (t->to_verify_memory != NULL)
3493 int retval = t->to_verify_memory (t, data, memaddr, size);
3496 fprintf_unfiltered (gdb_stdlog,
3497 "target_verify_memory (%s, %s) = %d\n",
3498 paddress (target_gdbarch, memaddr),
3509 debug_to_prepare_to_store (struct regcache *regcache)
3511 debug_target.to_prepare_to_store (regcache);
3513 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
3517 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
3518 int write, struct mem_attrib *attrib,
3519 struct target_ops *target)
3523 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
3526 fprintf_unfiltered (gdb_stdlog,
3527 "target_xfer_memory (%s, xxx, %d, %s, xxx) = %d",
3528 paddress (target_gdbarch, memaddr), len,
3529 write ? "write" : "read", retval);
3535 fputs_unfiltered (", bytes =", gdb_stdlog);
3536 for (i = 0; i < retval; i++)
3538 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
3540 if (targetdebug < 2 && i > 0)
3542 fprintf_unfiltered (gdb_stdlog, " ...");
3545 fprintf_unfiltered (gdb_stdlog, "\n");
3548 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
3552 fputc_unfiltered ('\n', gdb_stdlog);
3558 debug_to_files_info (struct target_ops *target)
3560 debug_target.to_files_info (target);
3562 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
3566 debug_to_insert_breakpoint (struct gdbarch *gdbarch,
3567 struct bp_target_info *bp_tgt)
3571 retval = debug_target.to_insert_breakpoint (gdbarch, bp_tgt);
3573 fprintf_unfiltered (gdb_stdlog,
3574 "target_insert_breakpoint (%s, xxx) = %ld\n",
3575 core_addr_to_string (bp_tgt->placed_address),
3576 (unsigned long) retval);
3581 debug_to_remove_breakpoint (struct gdbarch *gdbarch,
3582 struct bp_target_info *bp_tgt)
3586 retval = debug_target.to_remove_breakpoint (gdbarch, bp_tgt);
3588 fprintf_unfiltered (gdb_stdlog,
3589 "target_remove_breakpoint (%s, xxx) = %ld\n",
3590 core_addr_to_string (bp_tgt->placed_address),
3591 (unsigned long) retval);
3596 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
3600 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
3602 fprintf_unfiltered (gdb_stdlog,
3603 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
3604 (unsigned long) type,
3605 (unsigned long) cnt,
3606 (unsigned long) from_tty,
3607 (unsigned long) retval);
3612 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
3616 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
3618 fprintf_unfiltered (gdb_stdlog,
3619 "target_region_ok_for_hw_watchpoint (%s, %ld) = %s\n",
3620 core_addr_to_string (addr), (unsigned long) len,
3621 core_addr_to_string (retval));
3626 debug_to_can_accel_watchpoint_condition (CORE_ADDR addr, int len, int rw,
3627 struct expression *cond)
3631 retval = debug_target.to_can_accel_watchpoint_condition (addr, len,
3634 fprintf_unfiltered (gdb_stdlog,
3635 "target_can_accel_watchpoint_condition "
3636 "(%s, %d, %d, %s) = %ld\n",
3637 core_addr_to_string (addr), len, rw,
3638 host_address_to_string (cond), (unsigned long) retval);
3643 debug_to_stopped_by_watchpoint (void)
3647 retval = debug_target.to_stopped_by_watchpoint ();
3649 fprintf_unfiltered (gdb_stdlog,
3650 "target_stopped_by_watchpoint () = %ld\n",
3651 (unsigned long) retval);
3656 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
3660 retval = debug_target.to_stopped_data_address (target, addr);
3662 fprintf_unfiltered (gdb_stdlog,
3663 "target_stopped_data_address ([%s]) = %ld\n",
3664 core_addr_to_string (*addr),
3665 (unsigned long)retval);
3670 debug_to_watchpoint_addr_within_range (struct target_ops *target,
3672 CORE_ADDR start, int length)
3676 retval = debug_target.to_watchpoint_addr_within_range (target, addr,
3679 fprintf_filtered (gdb_stdlog,
3680 "target_watchpoint_addr_within_range (%s, %s, %d) = %d\n",
3681 core_addr_to_string (addr), core_addr_to_string (start),
3687 debug_to_insert_hw_breakpoint (struct gdbarch *gdbarch,
3688 struct bp_target_info *bp_tgt)
3692 retval = debug_target.to_insert_hw_breakpoint (gdbarch, bp_tgt);
3694 fprintf_unfiltered (gdb_stdlog,
3695 "target_insert_hw_breakpoint (%s, xxx) = %ld\n",
3696 core_addr_to_string (bp_tgt->placed_address),
3697 (unsigned long) retval);
3702 debug_to_remove_hw_breakpoint (struct gdbarch *gdbarch,
3703 struct bp_target_info *bp_tgt)
3707 retval = debug_target.to_remove_hw_breakpoint (gdbarch, bp_tgt);
3709 fprintf_unfiltered (gdb_stdlog,
3710 "target_remove_hw_breakpoint (%s, xxx) = %ld\n",
3711 core_addr_to_string (bp_tgt->placed_address),
3712 (unsigned long) retval);
3717 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type,
3718 struct expression *cond)
3722 retval = debug_target.to_insert_watchpoint (addr, len, type, cond);
3724 fprintf_unfiltered (gdb_stdlog,
3725 "target_insert_watchpoint (%s, %d, %d, %s) = %ld\n",
3726 core_addr_to_string (addr), len, type,
3727 host_address_to_string (cond), (unsigned long) retval);
3732 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type,
3733 struct expression *cond)
3737 retval = debug_target.to_remove_watchpoint (addr, len, type, cond);
3739 fprintf_unfiltered (gdb_stdlog,
3740 "target_remove_watchpoint (%s, %d, %d, %s) = %ld\n",
3741 core_addr_to_string (addr), len, type,
3742 host_address_to_string (cond), (unsigned long) retval);
3747 debug_to_terminal_init (void)
3749 debug_target.to_terminal_init ();
3751 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
3755 debug_to_terminal_inferior (void)
3757 debug_target.to_terminal_inferior ();
3759 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
3763 debug_to_terminal_ours_for_output (void)
3765 debug_target.to_terminal_ours_for_output ();
3767 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
3771 debug_to_terminal_ours (void)
3773 debug_target.to_terminal_ours ();
3775 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
3779 debug_to_terminal_save_ours (void)
3781 debug_target.to_terminal_save_ours ();
3783 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
3787 debug_to_terminal_info (char *arg, int from_tty)
3789 debug_target.to_terminal_info (arg, from_tty);
3791 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
3796 debug_to_load (char *args, int from_tty)
3798 debug_target.to_load (args, from_tty);
3800 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
3804 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
3808 retval = debug_target.to_lookup_symbol (name, addrp);
3810 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
3816 debug_to_post_startup_inferior (ptid_t ptid)
3818 debug_target.to_post_startup_inferior (ptid);
3820 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
3825 debug_to_insert_fork_catchpoint (int pid)
3829 retval = debug_target.to_insert_fork_catchpoint (pid);
3831 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d) = %d\n",
3838 debug_to_remove_fork_catchpoint (int pid)
3842 retval = debug_target.to_remove_fork_catchpoint (pid);
3844 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
3851 debug_to_insert_vfork_catchpoint (int pid)
3855 retval = debug_target.to_insert_vfork_catchpoint (pid);
3857 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d) = %d\n",
3864 debug_to_remove_vfork_catchpoint (int pid)
3868 retval = debug_target.to_remove_vfork_catchpoint (pid);
3870 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
3877 debug_to_insert_exec_catchpoint (int pid)
3881 retval = debug_target.to_insert_exec_catchpoint (pid);
3883 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d) = %d\n",
3890 debug_to_remove_exec_catchpoint (int pid)
3894 retval = debug_target.to_remove_exec_catchpoint (pid);
3896 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
3903 debug_to_has_exited (int pid, int wait_status, int *exit_status)
3907 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
3909 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
3910 pid, wait_status, *exit_status, has_exited);
3916 debug_to_can_run (void)
3920 retval = debug_target.to_can_run ();
3922 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
3928 debug_to_notice_signals (ptid_t ptid)
3930 debug_target.to_notice_signals (ptid);
3932 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
3936 static struct gdbarch *
3937 debug_to_thread_architecture (struct target_ops *ops, ptid_t ptid)
3939 struct gdbarch *retval;
3941 retval = debug_target.to_thread_architecture (ops, ptid);
3943 fprintf_unfiltered (gdb_stdlog,
3944 "target_thread_architecture (%s) = %s [%s]\n",
3945 target_pid_to_str (ptid),
3946 host_address_to_string (retval),
3947 gdbarch_bfd_arch_info (retval)->printable_name);
3952 debug_to_stop (ptid_t ptid)
3954 debug_target.to_stop (ptid);
3956 fprintf_unfiltered (gdb_stdlog, "target_stop (%s)\n",
3957 target_pid_to_str (ptid));
3961 debug_to_rcmd (char *command,
3962 struct ui_file *outbuf)
3964 debug_target.to_rcmd (command, outbuf);
3965 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
3969 debug_to_pid_to_exec_file (int pid)
3973 exec_file = debug_target.to_pid_to_exec_file (pid);
3975 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
3982 setup_target_debug (void)
3984 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3986 current_target.to_open = debug_to_open;
3987 current_target.to_post_attach = debug_to_post_attach;
3988 current_target.to_prepare_to_store = debug_to_prepare_to_store;
3989 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
3990 current_target.to_files_info = debug_to_files_info;
3991 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
3992 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
3993 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
3994 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
3995 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
3996 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
3997 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
3998 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
3999 current_target.to_stopped_data_address = debug_to_stopped_data_address;
4000 current_target.to_watchpoint_addr_within_range
4001 = debug_to_watchpoint_addr_within_range;
4002 current_target.to_region_ok_for_hw_watchpoint
4003 = debug_to_region_ok_for_hw_watchpoint;
4004 current_target.to_can_accel_watchpoint_condition
4005 = debug_to_can_accel_watchpoint_condition;
4006 current_target.to_terminal_init = debug_to_terminal_init;
4007 current_target.to_terminal_inferior = debug_to_terminal_inferior;
4008 current_target.to_terminal_ours_for_output
4009 = debug_to_terminal_ours_for_output;
4010 current_target.to_terminal_ours = debug_to_terminal_ours;
4011 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
4012 current_target.to_terminal_info = debug_to_terminal_info;
4013 current_target.to_load = debug_to_load;
4014 current_target.to_lookup_symbol = debug_to_lookup_symbol;
4015 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
4016 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
4017 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
4018 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
4019 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
4020 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
4021 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
4022 current_target.to_has_exited = debug_to_has_exited;
4023 current_target.to_can_run = debug_to_can_run;
4024 current_target.to_notice_signals = debug_to_notice_signals;
4025 current_target.to_stop = debug_to_stop;
4026 current_target.to_rcmd = debug_to_rcmd;
4027 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
4028 current_target.to_thread_architecture = debug_to_thread_architecture;
4032 static char targ_desc[] =
4033 "Names of targets and files being debugged.\nShows the entire \
4034 stack of targets currently in use (including the exec-file,\n\
4035 core-file, and process, if any), as well as the symbol file name.";
4038 do_monitor_command (char *cmd,
4041 if ((current_target.to_rcmd
4042 == (void (*) (char *, struct ui_file *)) tcomplain)
4043 || (current_target.to_rcmd == debug_to_rcmd
4044 && (debug_target.to_rcmd
4045 == (void (*) (char *, struct ui_file *)) tcomplain)))
4046 error (_("\"monitor\" command not supported by this target."));
4047 target_rcmd (cmd, gdb_stdtarg);
4050 /* Print the name of each layers of our target stack. */
4053 maintenance_print_target_stack (char *cmd, int from_tty)
4055 struct target_ops *t;
4057 printf_filtered (_("The current target stack is:\n"));
4059 for (t = target_stack; t != NULL; t = t->beneath)
4061 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
4065 /* Controls if async mode is permitted. */
4066 int target_async_permitted = 0;
4068 /* The set command writes to this variable. If the inferior is
4069 executing, linux_nat_async_permitted is *not* updated. */
4070 static int target_async_permitted_1 = 0;
4073 set_maintenance_target_async_permitted (char *args, int from_tty,
4074 struct cmd_list_element *c)
4076 if (have_live_inferiors ())
4078 target_async_permitted_1 = target_async_permitted;
4079 error (_("Cannot change this setting while the inferior is running."));
4082 target_async_permitted = target_async_permitted_1;
4086 show_maintenance_target_async_permitted (struct ui_file *file, int from_tty,
4087 struct cmd_list_element *c,
4090 fprintf_filtered (file,
4091 _("Controlling the inferior in "
4092 "asynchronous mode is %s.\n"), value);
4095 /* Temporary copies of permission settings. */
4097 static int may_write_registers_1 = 1;
4098 static int may_write_memory_1 = 1;
4099 static int may_insert_breakpoints_1 = 1;
4100 static int may_insert_tracepoints_1 = 1;
4101 static int may_insert_fast_tracepoints_1 = 1;
4102 static int may_stop_1 = 1;
4104 /* Make the user-set values match the real values again. */
4107 update_target_permissions (void)
4109 may_write_registers_1 = may_write_registers;
4110 may_write_memory_1 = may_write_memory;
4111 may_insert_breakpoints_1 = may_insert_breakpoints;
4112 may_insert_tracepoints_1 = may_insert_tracepoints;
4113 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4114 may_stop_1 = may_stop;
4117 /* The one function handles (most of) the permission flags in the same
4121 set_target_permissions (char *args, int from_tty,
4122 struct cmd_list_element *c)
4124 if (target_has_execution)
4126 update_target_permissions ();
4127 error (_("Cannot change this setting while the inferior is running."));
4130 /* Make the real values match the user-changed values. */
4131 may_write_registers = may_write_registers_1;
4132 may_insert_breakpoints = may_insert_breakpoints_1;
4133 may_insert_tracepoints = may_insert_tracepoints_1;
4134 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4135 may_stop = may_stop_1;
4136 update_observer_mode ();
4139 /* Set memory write permission independently of observer mode. */
4142 set_write_memory_permission (char *args, int from_tty,
4143 struct cmd_list_element *c)
4145 /* Make the real values match the user-changed values. */
4146 may_write_memory = may_write_memory_1;
4147 update_observer_mode ();
4152 initialize_targets (void)
4154 init_dummy_target ();
4155 push_target (&dummy_target);
4157 add_info ("target", target_info, targ_desc);
4158 add_info ("files", target_info, targ_desc);
4160 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4161 Set target debugging."), _("\
4162 Show target debugging."), _("\
4163 When non-zero, target debugging is enabled. Higher numbers are more\n\
4164 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
4168 &setdebuglist, &showdebuglist);
4170 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4171 &trust_readonly, _("\
4172 Set mode for reading from readonly sections."), _("\
4173 Show mode for reading from readonly sections."), _("\
4174 When this mode is on, memory reads from readonly sections (such as .text)\n\
4175 will be read from the object file instead of from the target. This will\n\
4176 result in significant performance improvement for remote targets."),
4178 show_trust_readonly,
4179 &setlist, &showlist);
4181 add_com ("monitor", class_obscure, do_monitor_command,
4182 _("Send a command to the remote monitor (remote targets only)."));
4184 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4185 _("Print the name of each layer of the internal target stack."),
4186 &maintenanceprintlist);
4188 add_setshow_boolean_cmd ("target-async", no_class,
4189 &target_async_permitted_1, _("\
4190 Set whether gdb controls the inferior in asynchronous mode."), _("\
4191 Show whether gdb controls the inferior in asynchronous mode."), _("\
4192 Tells gdb whether to control the inferior in asynchronous mode."),
4193 set_maintenance_target_async_permitted,
4194 show_maintenance_target_async_permitted,
4198 add_setshow_boolean_cmd ("stack-cache", class_support,
4199 &stack_cache_enabled_p_1, _("\
4200 Set cache use for stack access."), _("\
4201 Show cache use for stack access."), _("\
4202 When on, use the data cache for all stack access, regardless of any\n\
4203 configured memory regions. This improves remote performance significantly.\n\
4204 By default, caching for stack access is on."),
4205 set_stack_cache_enabled_p,
4206 show_stack_cache_enabled_p,
4207 &setlist, &showlist);
4209 add_setshow_boolean_cmd ("may-write-registers", class_support,
4210 &may_write_registers_1, _("\
4211 Set permission to write into registers."), _("\
4212 Show permission to write into registers."), _("\
4213 When this permission is on, GDB may write into the target's registers.\n\
4214 Otherwise, any sort of write attempt will result in an error."),
4215 set_target_permissions, NULL,
4216 &setlist, &showlist);
4218 add_setshow_boolean_cmd ("may-write-memory", class_support,
4219 &may_write_memory_1, _("\
4220 Set permission to write into target memory."), _("\
4221 Show permission to write into target memory."), _("\
4222 When this permission is on, GDB may write into the target's memory.\n\
4223 Otherwise, any sort of write attempt will result in an error."),
4224 set_write_memory_permission, NULL,
4225 &setlist, &showlist);
4227 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4228 &may_insert_breakpoints_1, _("\
4229 Set permission to insert breakpoints in the target."), _("\
4230 Show permission to insert breakpoints in the target."), _("\
4231 When this permission is on, GDB may insert breakpoints in the program.\n\
4232 Otherwise, any sort of insertion attempt will result in an error."),
4233 set_target_permissions, NULL,
4234 &setlist, &showlist);
4236 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4237 &may_insert_tracepoints_1, _("\
4238 Set permission to insert tracepoints in the target."), _("\
4239 Show permission to insert tracepoints in the target."), _("\
4240 When this permission is on, GDB may insert tracepoints in the program.\n\
4241 Otherwise, any sort of insertion attempt will result in an error."),
4242 set_target_permissions, NULL,
4243 &setlist, &showlist);
4245 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4246 &may_insert_fast_tracepoints_1, _("\
4247 Set permission to insert fast tracepoints in the target."), _("\
4248 Show permission to insert fast tracepoints in the target."), _("\
4249 When this permission is on, GDB may insert fast tracepoints.\n\
4250 Otherwise, any sort of insertion attempt will result in an error."),
4251 set_target_permissions, NULL,
4252 &setlist, &showlist);
4254 add_setshow_boolean_cmd ("may-interrupt", class_support,
4256 Set permission to interrupt or signal the target."), _("\
4257 Show permission to interrupt or signal the target."), _("\
4258 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4259 Otherwise, any attempt to interrupt or stop will be ignored."),
4260 set_target_permissions, NULL,
4261 &setlist, &showlist);
4264 target_dcache = dcache_init ();