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
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 2 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, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
28 #include "gdb_string.h"
40 #include "gdb_assert.h"
42 #include "exceptions.h"
43 #include "target-descriptions.h"
45 static void target_info (char *, int);
47 static void maybe_kill_then_attach (char *, int);
49 static void kill_or_be_killed (int);
51 static void default_terminal_info (char *, int);
53 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
55 static int nosymbol (char *, CORE_ADDR *);
57 static void tcomplain (void) ATTR_NORETURN;
59 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
61 static int return_zero (void);
63 static int return_one (void);
65 static int return_minus_one (void);
67 void target_ignore (void);
69 static void target_command (char *, int);
71 static struct target_ops *find_default_run_target (char *);
73 static void nosupport_runtime (void);
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 void init_dummy_target (void);
95 static struct target_ops debug_target;
97 static void debug_to_open (char *, int);
99 static void debug_to_close (int);
101 static void debug_to_attach (char *, int);
103 static void debug_to_detach (char *, int);
105 static void debug_to_resume (ptid_t, int, enum target_signal);
107 static ptid_t debug_to_wait (ptid_t, struct target_waitstatus *);
109 static void debug_to_fetch_registers (struct regcache *, int);
111 static void debug_to_store_registers (struct regcache *, int);
113 static void debug_to_prepare_to_store (struct regcache *);
115 static void debug_to_files_info (struct target_ops *);
117 static int debug_to_insert_breakpoint (struct bp_target_info *);
119 static int debug_to_remove_breakpoint (struct bp_target_info *);
121 static int debug_to_can_use_hw_breakpoint (int, int, int);
123 static int debug_to_insert_hw_breakpoint (struct bp_target_info *);
125 static int debug_to_remove_hw_breakpoint (struct bp_target_info *);
127 static int debug_to_insert_watchpoint (CORE_ADDR, int, int);
129 static int debug_to_remove_watchpoint (CORE_ADDR, int, int);
131 static int debug_to_stopped_by_watchpoint (void);
133 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
135 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
137 static void debug_to_terminal_init (void);
139 static void debug_to_terminal_inferior (void);
141 static void debug_to_terminal_ours_for_output (void);
143 static void debug_to_terminal_save_ours (void);
145 static void debug_to_terminal_ours (void);
147 static void debug_to_terminal_info (char *, int);
149 static void debug_to_kill (void);
151 static void debug_to_load (char *, int);
153 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
155 static void debug_to_mourn_inferior (void);
157 static int debug_to_can_run (void);
159 static void debug_to_notice_signals (ptid_t);
161 static int debug_to_thread_alive (ptid_t);
163 static void debug_to_stop (void);
165 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
166 wierd and mysterious ways. Putting the variable here lets those
167 wierd and mysterious ways keep building while they are being
168 converted to the inferior inheritance structure. */
169 struct target_ops deprecated_child_ops;
171 /* Pointer to array of target architecture structures; the size of the
172 array; the current index into the array; the allocated size of the
174 struct target_ops **target_structs;
175 unsigned target_struct_size;
176 unsigned target_struct_index;
177 unsigned target_struct_allocsize;
178 #define DEFAULT_ALLOCSIZE 10
180 /* The initial current target, so that there is always a semi-valid
183 static struct target_ops dummy_target;
185 /* Top of target stack. */
187 static struct target_ops *target_stack;
189 /* The target structure we are currently using to talk to a process
190 or file or whatever "inferior" we have. */
192 struct target_ops current_target;
194 /* Command list for target. */
196 static struct cmd_list_element *targetlist = NULL;
198 /* Nonzero if we are debugging an attached outside process
199 rather than an inferior. */
203 /* Nonzero if we should trust readonly sections from the
204 executable when reading memory. */
206 static int trust_readonly = 0;
208 /* Non-zero if we want to see trace of target level stuff. */
210 static int targetdebug = 0;
212 show_targetdebug (struct ui_file *file, int from_tty,
213 struct cmd_list_element *c, const char *value)
215 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
218 static void setup_target_debug (void);
220 DCACHE *target_dcache;
222 /* The user just typed 'target' without the name of a target. */
225 target_command (char *arg, int from_tty)
227 fputs_filtered ("Argument required (target name). Try `help target'\n",
231 /* Add a possible target architecture to the list. */
234 add_target (struct target_ops *t)
236 /* Provide default values for all "must have" methods. */
237 if (t->to_xfer_partial == NULL)
238 t->to_xfer_partial = default_xfer_partial;
242 target_struct_allocsize = DEFAULT_ALLOCSIZE;
243 target_structs = (struct target_ops **) xmalloc
244 (target_struct_allocsize * sizeof (*target_structs));
246 if (target_struct_size >= target_struct_allocsize)
248 target_struct_allocsize *= 2;
249 target_structs = (struct target_ops **)
250 xrealloc ((char *) target_structs,
251 target_struct_allocsize * sizeof (*target_structs));
253 target_structs[target_struct_size++] = t;
255 if (targetlist == NULL)
256 add_prefix_cmd ("target", class_run, target_command, _("\
257 Connect to a target machine or process.\n\
258 The first argument is the type or protocol of the target machine.\n\
259 Remaining arguments are interpreted by the target protocol. For more\n\
260 information on the arguments for a particular protocol, type\n\
261 `help target ' followed by the protocol name."),
262 &targetlist, "target ", 0, &cmdlist);
263 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
274 target_load (char *arg, int from_tty)
276 dcache_invalidate (target_dcache);
277 (*current_target.to_load) (arg, from_tty);
281 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
282 struct target_ops *t)
284 errno = EIO; /* Can't read/write this location */
285 return 0; /* No bytes handled */
291 error (_("You can't do that when your target is `%s'"),
292 current_target.to_shortname);
298 error (_("You can't do that without a process to debug."));
302 nosymbol (char *name, CORE_ADDR *addrp)
304 return 1; /* Symbol does not exist in target env */
308 nosupport_runtime (void)
310 if (ptid_equal (inferior_ptid, null_ptid))
313 error (_("No run-time support for this"));
318 default_terminal_info (char *args, int from_tty)
320 printf_unfiltered (_("No saved terminal information.\n"));
323 /* This is the default target_create_inferior and target_attach function.
324 If the current target is executing, it asks whether to kill it off.
325 If this function returns without calling error(), it has killed off
326 the target, and the operation should be attempted. */
329 kill_or_be_killed (int from_tty)
331 if (target_has_execution)
333 printf_unfiltered (_("You are already running a program:\n"));
334 target_files_info ();
335 if (query ("Kill it? "))
338 if (target_has_execution)
339 error (_("Killing the program did not help."));
344 error (_("Program not killed."));
351 maybe_kill_then_attach (char *args, int from_tty)
353 kill_or_be_killed (from_tty);
354 target_attach (args, from_tty);
358 maybe_kill_then_create_inferior (char *exec, char *args, char **env,
361 kill_or_be_killed (0);
362 target_create_inferior (exec, args, env, from_tty);
365 /* Go through the target stack from top to bottom, copying over zero
366 entries in current_target, then filling in still empty entries. In
367 effect, we are doing class inheritance through the pushed target
370 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
371 is currently implemented, is that it discards any knowledge of
372 which target an inherited method originally belonged to.
373 Consequently, new new target methods should instead explicitly and
374 locally search the target stack for the target that can handle the
378 update_current_target (void)
380 struct target_ops *t;
382 /* First, reset current's contents. */
383 memset (¤t_target, 0, sizeof (current_target));
385 #define INHERIT(FIELD, TARGET) \
386 if (!current_target.FIELD) \
387 current_target.FIELD = (TARGET)->FIELD
389 for (t = target_stack; t; t = t->beneath)
391 INHERIT (to_shortname, t);
392 INHERIT (to_longname, t);
394 INHERIT (to_open, t);
395 INHERIT (to_close, t);
396 INHERIT (to_attach, t);
397 INHERIT (to_post_attach, t);
398 INHERIT (to_detach, t);
399 /* Do not inherit to_disconnect. */
400 INHERIT (to_resume, t);
401 INHERIT (to_wait, t);
402 INHERIT (to_fetch_registers, t);
403 INHERIT (to_store_registers, t);
404 INHERIT (to_prepare_to_store, t);
405 INHERIT (deprecated_xfer_memory, t);
406 INHERIT (to_files_info, t);
407 INHERIT (to_insert_breakpoint, t);
408 INHERIT (to_remove_breakpoint, t);
409 INHERIT (to_can_use_hw_breakpoint, t);
410 INHERIT (to_insert_hw_breakpoint, t);
411 INHERIT (to_remove_hw_breakpoint, t);
412 INHERIT (to_insert_watchpoint, t);
413 INHERIT (to_remove_watchpoint, t);
414 INHERIT (to_stopped_data_address, t);
415 INHERIT (to_stopped_by_watchpoint, t);
416 INHERIT (to_have_steppable_watchpoint, t);
417 INHERIT (to_have_continuable_watchpoint, t);
418 INHERIT (to_region_ok_for_hw_watchpoint, t);
419 INHERIT (to_terminal_init, t);
420 INHERIT (to_terminal_inferior, t);
421 INHERIT (to_terminal_ours_for_output, t);
422 INHERIT (to_terminal_ours, t);
423 INHERIT (to_terminal_save_ours, t);
424 INHERIT (to_terminal_info, t);
425 INHERIT (to_kill, t);
426 INHERIT (to_load, t);
427 INHERIT (to_lookup_symbol, t);
428 INHERIT (to_create_inferior, t);
429 INHERIT (to_post_startup_inferior, t);
430 INHERIT (to_acknowledge_created_inferior, t);
431 INHERIT (to_insert_fork_catchpoint, t);
432 INHERIT (to_remove_fork_catchpoint, t);
433 INHERIT (to_insert_vfork_catchpoint, t);
434 INHERIT (to_remove_vfork_catchpoint, t);
435 /* Do not inherit to_follow_fork. */
436 INHERIT (to_insert_exec_catchpoint, t);
437 INHERIT (to_remove_exec_catchpoint, t);
438 INHERIT (to_reported_exec_events_per_exec_call, t);
439 INHERIT (to_has_exited, t);
440 INHERIT (to_mourn_inferior, t);
441 INHERIT (to_can_run, t);
442 INHERIT (to_notice_signals, t);
443 INHERIT (to_thread_alive, t);
444 INHERIT (to_find_new_threads, t);
445 INHERIT (to_pid_to_str, t);
446 INHERIT (to_extra_thread_info, t);
447 INHERIT (to_stop, t);
448 /* Do not inherit to_xfer_partial. */
449 INHERIT (to_rcmd, t);
450 INHERIT (to_enable_exception_callback, t);
451 INHERIT (to_get_current_exception_event, t);
452 INHERIT (to_pid_to_exec_file, t);
453 INHERIT (to_stratum, t);
454 INHERIT (to_has_all_memory, t);
455 INHERIT (to_has_memory, t);
456 INHERIT (to_has_stack, t);
457 INHERIT (to_has_registers, t);
458 INHERIT (to_has_execution, t);
459 INHERIT (to_has_thread_control, t);
460 INHERIT (to_sections, t);
461 INHERIT (to_sections_end, t);
462 INHERIT (to_can_async_p, t);
463 INHERIT (to_is_async_p, t);
464 INHERIT (to_async, t);
465 INHERIT (to_async_mask_value, t);
466 INHERIT (to_find_memory_regions, t);
467 INHERIT (to_make_corefile_notes, t);
468 INHERIT (to_get_thread_local_address, t);
469 /* Do not inherit to_read_description. */
470 INHERIT (to_magic, t);
471 /* Do not inherit to_memory_map. */
472 /* Do not inherit to_flash_erase. */
473 /* Do not inherit to_flash_done. */
477 /* Clean up a target struct so it no longer has any zero pointers in
478 it. Some entries are defaulted to a method that print an error,
479 others are hard-wired to a standard recursive default. */
481 #define de_fault(field, value) \
482 if (!current_target.field) \
483 current_target.field = value
486 (void (*) (char *, int))
492 maybe_kill_then_attach);
493 de_fault (to_post_attach,
497 (void (*) (char *, int))
500 (void (*) (ptid_t, int, enum target_signal))
503 (ptid_t (*) (ptid_t, struct target_waitstatus *))
505 de_fault (to_fetch_registers,
506 (void (*) (struct regcache *, int))
508 de_fault (to_store_registers,
509 (void (*) (struct regcache *, int))
511 de_fault (to_prepare_to_store,
512 (void (*) (struct regcache *))
514 de_fault (deprecated_xfer_memory,
515 (int (*) (CORE_ADDR, gdb_byte *, int, int, struct mem_attrib *, struct target_ops *))
517 de_fault (to_files_info,
518 (void (*) (struct target_ops *))
520 de_fault (to_insert_breakpoint,
521 memory_insert_breakpoint);
522 de_fault (to_remove_breakpoint,
523 memory_remove_breakpoint);
524 de_fault (to_can_use_hw_breakpoint,
525 (int (*) (int, int, int))
527 de_fault (to_insert_hw_breakpoint,
528 (int (*) (struct bp_target_info *))
530 de_fault (to_remove_hw_breakpoint,
531 (int (*) (struct bp_target_info *))
533 de_fault (to_insert_watchpoint,
534 (int (*) (CORE_ADDR, int, int))
536 de_fault (to_remove_watchpoint,
537 (int (*) (CORE_ADDR, int, int))
539 de_fault (to_stopped_by_watchpoint,
542 de_fault (to_stopped_data_address,
543 (int (*) (struct target_ops *, CORE_ADDR *))
545 de_fault (to_region_ok_for_hw_watchpoint,
546 default_region_ok_for_hw_watchpoint);
547 de_fault (to_terminal_init,
550 de_fault (to_terminal_inferior,
553 de_fault (to_terminal_ours_for_output,
556 de_fault (to_terminal_ours,
559 de_fault (to_terminal_save_ours,
562 de_fault (to_terminal_info,
563 default_terminal_info);
568 (void (*) (char *, int))
570 de_fault (to_lookup_symbol,
571 (int (*) (char *, CORE_ADDR *))
573 de_fault (to_create_inferior,
574 maybe_kill_then_create_inferior);
575 de_fault (to_post_startup_inferior,
578 de_fault (to_acknowledge_created_inferior,
581 de_fault (to_insert_fork_catchpoint,
584 de_fault (to_remove_fork_catchpoint,
587 de_fault (to_insert_vfork_catchpoint,
590 de_fault (to_remove_vfork_catchpoint,
593 de_fault (to_insert_exec_catchpoint,
596 de_fault (to_remove_exec_catchpoint,
599 de_fault (to_reported_exec_events_per_exec_call,
602 de_fault (to_has_exited,
603 (int (*) (int, int, int *))
605 de_fault (to_mourn_inferior,
608 de_fault (to_can_run,
610 de_fault (to_notice_signals,
613 de_fault (to_thread_alive,
616 de_fault (to_find_new_threads,
619 de_fault (to_extra_thread_info,
620 (char *(*) (struct thread_info *))
625 current_target.to_xfer_partial = current_xfer_partial;
627 (void (*) (char *, struct ui_file *))
629 de_fault (to_enable_exception_callback,
630 (struct symtab_and_line * (*) (enum exception_event_kind, int))
632 de_fault (to_get_current_exception_event,
633 (struct exception_event_record * (*) (void))
635 de_fault (to_pid_to_exec_file,
638 de_fault (to_can_async_p,
641 de_fault (to_is_async_p,
645 (void (*) (void (*) (enum inferior_event_type, void*), void*))
647 current_target.to_read_description = NULL;
650 /* Finally, position the target-stack beneath the squashed
651 "current_target". That way code looking for a non-inherited
652 target method can quickly and simply find it. */
653 current_target.beneath = target_stack;
656 /* Mark OPS as a running target. This reverses the effect
657 of target_mark_exited. */
660 target_mark_running (struct target_ops *ops)
662 struct target_ops *t;
664 for (t = target_stack; t != NULL; t = t->beneath)
668 internal_error (__FILE__, __LINE__,
669 "Attempted to mark unpushed target \"%s\" as running",
672 ops->to_has_execution = 1;
673 ops->to_has_all_memory = 1;
674 ops->to_has_memory = 1;
675 ops->to_has_stack = 1;
676 ops->to_has_registers = 1;
678 update_current_target ();
681 /* Mark OPS as a non-running target. This reverses the effect
682 of target_mark_running. */
685 target_mark_exited (struct target_ops *ops)
687 struct target_ops *t;
689 for (t = target_stack; t != NULL; t = t->beneath)
693 internal_error (__FILE__, __LINE__,
694 "Attempted to mark unpushed target \"%s\" as running",
697 ops->to_has_execution = 0;
698 ops->to_has_all_memory = 0;
699 ops->to_has_memory = 0;
700 ops->to_has_stack = 0;
701 ops->to_has_registers = 0;
703 update_current_target ();
706 /* Push a new target type into the stack of the existing target accessors,
707 possibly superseding some of the existing accessors.
709 Result is zero if the pushed target ended up on top of the stack,
710 nonzero if at least one target is on top of it.
712 Rather than allow an empty stack, we always have the dummy target at
713 the bottom stratum, so we can call the function vectors without
717 push_target (struct target_ops *t)
719 struct target_ops **cur;
721 /* Check magic number. If wrong, it probably means someone changed
722 the struct definition, but not all the places that initialize one. */
723 if (t->to_magic != OPS_MAGIC)
725 fprintf_unfiltered (gdb_stderr,
726 "Magic number of %s target struct wrong\n",
728 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
731 /* Find the proper stratum to install this target in. */
732 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
734 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
738 /* If there's already targets at this stratum, remove them. */
739 /* FIXME: cagney/2003-10-15: I think this should be popping all
740 targets to CUR, and not just those at this stratum level. */
741 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
743 /* There's already something at this stratum level. Close it,
744 and un-hook it from the stack. */
745 struct target_ops *tmp = (*cur);
746 (*cur) = (*cur)->beneath;
748 target_close (tmp, 0);
751 /* We have removed all targets in our stratum, now add the new one. */
755 update_current_target ();
758 setup_target_debug ();
761 return (t != target_stack);
764 /* Remove a target_ops vector from the stack, wherever it may be.
765 Return how many times it was removed (0 or 1). */
768 unpush_target (struct target_ops *t)
770 struct target_ops **cur;
771 struct target_ops *tmp;
773 /* Look for the specified target. Note that we assume that a target
774 can only occur once in the target stack. */
776 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
783 return 0; /* Didn't find target_ops, quit now */
785 /* NOTE: cagney/2003-12-06: In '94 the close call was made
786 unconditional by moving it to before the above check that the
787 target was in the target stack (something about "Change the way
788 pushing and popping of targets work to support target overlays
789 and inheritance"). This doesn't make much sense - only open
790 targets should be closed. */
793 /* Unchain the target */
795 (*cur) = (*cur)->beneath;
798 update_current_target ();
806 target_close (¤t_target, 0); /* Let it clean up */
807 if (unpush_target (target_stack) == 1)
810 fprintf_unfiltered (gdb_stderr,
811 "pop_target couldn't find target %s\n",
812 current_target.to_shortname);
813 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
816 /* Using the objfile specified in BATON, find the address for the
817 current thread's thread-local storage with offset OFFSET. */
819 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
821 volatile CORE_ADDR addr = 0;
823 if (target_get_thread_local_address_p ()
824 && gdbarch_fetch_tls_load_module_address_p (current_gdbarch))
826 ptid_t ptid = inferior_ptid;
827 volatile struct gdb_exception ex;
829 TRY_CATCH (ex, RETURN_MASK_ALL)
833 /* Fetch the load module address for this objfile. */
834 lm_addr = gdbarch_fetch_tls_load_module_address (current_gdbarch,
836 /* If it's 0, throw the appropriate exception. */
838 throw_error (TLS_LOAD_MODULE_NOT_FOUND_ERROR,
839 _("TLS load module not found"));
841 addr = target_get_thread_local_address (ptid, lm_addr, offset);
843 /* If an error occurred, print TLS related messages here. Otherwise,
844 throw the error to some higher catcher. */
847 int objfile_is_library = (objfile->flags & OBJF_SHARED);
851 case TLS_NO_LIBRARY_SUPPORT_ERROR:
852 error (_("Cannot find thread-local variables in this thread library."));
854 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
855 if (objfile_is_library)
856 error (_("Cannot find shared library `%s' in dynamic"
857 " linker's load module list"), objfile->name);
859 error (_("Cannot find executable file `%s' in dynamic"
860 " linker's load module list"), objfile->name);
862 case TLS_NOT_ALLOCATED_YET_ERROR:
863 if (objfile_is_library)
864 error (_("The inferior has not yet allocated storage for"
865 " thread-local variables in\n"
866 "the shared library `%s'\n"
868 objfile->name, target_pid_to_str (ptid));
870 error (_("The inferior has not yet allocated storage for"
871 " thread-local variables in\n"
872 "the executable `%s'\n"
874 objfile->name, target_pid_to_str (ptid));
876 case TLS_GENERIC_ERROR:
877 if (objfile_is_library)
878 error (_("Cannot find thread-local storage for %s, "
879 "shared library %s:\n%s"),
880 target_pid_to_str (ptid),
881 objfile->name, ex.message);
883 error (_("Cannot find thread-local storage for %s, "
884 "executable file %s:\n%s"),
885 target_pid_to_str (ptid),
886 objfile->name, ex.message);
889 throw_exception (ex);
894 /* It wouldn't be wrong here to try a gdbarch method, too; finding
895 TLS is an ABI-specific thing. But we don't do that yet. */
897 error (_("Cannot find thread-local variables on this target"));
903 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
905 /* target_read_string -- read a null terminated string, up to LEN bytes,
906 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
907 Set *STRING to a pointer to malloc'd memory containing the data; the caller
908 is responsible for freeing it. Return the number of bytes successfully
912 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
914 int tlen, origlen, offset, i;
918 int buffer_allocated;
920 unsigned int nbytes_read = 0;
922 /* Small for testing. */
923 buffer_allocated = 4;
924 buffer = xmalloc (buffer_allocated);
931 tlen = MIN (len, 4 - (memaddr & 3));
932 offset = memaddr & 3;
934 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
937 /* The transfer request might have crossed the boundary to an
938 unallocated region of memory. Retry the transfer, requesting
942 errcode = target_read_memory (memaddr, buf, 1);
947 if (bufptr - buffer + tlen > buffer_allocated)
950 bytes = bufptr - buffer;
951 buffer_allocated *= 2;
952 buffer = xrealloc (buffer, buffer_allocated);
953 bufptr = buffer + bytes;
956 for (i = 0; i < tlen; i++)
958 *bufptr++ = buf[i + offset];
959 if (buf[i + offset] == '\000')
961 nbytes_read += i + 1;
978 /* Find a section containing ADDR. */
979 struct section_table *
980 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
982 struct section_table *secp;
983 for (secp = target->to_sections;
984 secp < target->to_sections_end;
987 if (addr >= secp->addr && addr < secp->endaddr)
993 /* Perform a partial memory transfer. The arguments and return
994 value are just as for target_xfer_partial. */
997 memory_xfer_partial (struct target_ops *ops, void *readbuf, const void *writebuf,
998 ULONGEST memaddr, LONGEST len)
1002 struct mem_region *region;
1004 /* Zero length requests are ok and require no work. */
1008 /* Try the executable file, if "trust-readonly-sections" is set. */
1009 if (readbuf != NULL && trust_readonly)
1011 struct section_table *secp;
1013 secp = target_section_by_addr (ops, memaddr);
1015 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1017 return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
1020 /* Likewise for accesses to unmapped overlay sections. */
1021 if (readbuf != NULL && overlay_debugging)
1023 asection *section = find_pc_overlay (memaddr);
1024 if (pc_in_unmapped_range (memaddr, section))
1025 return xfer_memory (memaddr, readbuf, len, 0, NULL, ops);
1028 /* Try GDB's internal data cache. */
1029 region = lookup_mem_region (memaddr);
1030 /* region->hi == 0 means there's no upper bound. */
1031 if (memaddr + len < region->hi || region->hi == 0)
1034 reg_len = region->hi - memaddr;
1036 switch (region->attrib.mode)
1039 if (writebuf != NULL)
1044 if (readbuf != NULL)
1049 /* We only support writing to flash during "load" for now. */
1050 if (writebuf != NULL)
1051 error (_("Writing to flash memory forbidden in this context"));
1058 if (region->attrib.cache)
1060 /* FIXME drow/2006-08-09: This call discards OPS, so the raw
1061 memory request will start back at current_target. */
1062 if (readbuf != NULL)
1063 res = dcache_xfer_memory (target_dcache, memaddr, readbuf,
1066 /* FIXME drow/2006-08-09: If we're going to preserve const
1067 correctness dcache_xfer_memory should take readbuf and
1069 res = dcache_xfer_memory (target_dcache, memaddr,
1078 /* If none of those methods found the memory we wanted, fall back
1079 to a target partial transfer. Normally a single call to
1080 to_xfer_partial is enough; if it doesn't recognize an object
1081 it will call the to_xfer_partial of the next target down.
1082 But for memory this won't do. Memory is the only target
1083 object which can be read from more than one valid target.
1084 A core file, for instance, could have some of memory but
1085 delegate other bits to the target below it. So, we must
1086 manually try all targets. */
1090 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1091 readbuf, writebuf, memaddr, reg_len);
1095 /* We want to continue past core files to executables, but not
1096 past a running target's memory. */
1097 if (ops->to_has_all_memory)
1102 while (ops != NULL);
1104 /* If we still haven't got anything, return the last error. We
1110 target_xfer_partial (struct target_ops *ops,
1111 enum target_object object, const char *annex,
1112 void *readbuf, const void *writebuf,
1113 ULONGEST offset, LONGEST len)
1117 gdb_assert (ops->to_xfer_partial != NULL);
1119 /* If this is a memory transfer, let the memory-specific code
1120 have a look at it instead. Memory transfers are more
1122 if (object == TARGET_OBJECT_MEMORY)
1123 retval = memory_xfer_partial (ops, readbuf, writebuf, offset, len);
1126 enum target_object raw_object = object;
1128 /* If this is a raw memory transfer, request the normal
1129 memory object from other layers. */
1130 if (raw_object == TARGET_OBJECT_RAW_MEMORY)
1131 raw_object = TARGET_OBJECT_MEMORY;
1133 retval = ops->to_xfer_partial (ops, raw_object, annex, readbuf,
1134 writebuf, offset, len);
1139 const unsigned char *myaddr = NULL;
1141 fprintf_unfiltered (gdb_stdlog,
1142 "%s:target_xfer_partial (%d, %s, 0x%lx, 0x%lx, 0x%s, %s) = %s",
1145 (annex ? annex : "(null)"),
1146 (long) readbuf, (long) writebuf,
1147 paddr_nz (offset), paddr_d (len), paddr_d (retval));
1153 if (retval > 0 && myaddr != NULL)
1157 fputs_unfiltered (", bytes =", gdb_stdlog);
1158 for (i = 0; i < retval; i++)
1160 if ((((long) &(myaddr[i])) & 0xf) == 0)
1162 if (targetdebug < 2 && i > 0)
1164 fprintf_unfiltered (gdb_stdlog, " ...");
1167 fprintf_unfiltered (gdb_stdlog, "\n");
1170 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1174 fputc_unfiltered ('\n', gdb_stdlog);
1179 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
1180 GDB's memory at MYADDR. Returns either 0 for success or an errno value
1181 if any error occurs.
1183 If an error occurs, no guarantee is made about the contents of the data at
1184 MYADDR. In particular, the caller should not depend upon partial reads
1185 filling the buffer with good data. There is no way for the caller to know
1186 how much good data might have been transfered anyway. Callers that can
1187 deal with partial reads should call target_read (which will retry until
1188 it makes no progress, and then return how much was transferred). */
1191 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
1193 if (target_read (¤t_target, TARGET_OBJECT_MEMORY, NULL,
1194 myaddr, memaddr, len) == len)
1201 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1203 if (target_write (¤t_target, TARGET_OBJECT_MEMORY, NULL,
1204 myaddr, memaddr, len) == len)
1210 /* Fetch the target's memory map. */
1213 target_memory_map (void)
1215 VEC(mem_region_s) *result;
1216 struct mem_region *last_one, *this_one;
1218 struct target_ops *t;
1221 fprintf_unfiltered (gdb_stdlog, "target_memory_map ()\n");
1223 for (t = current_target.beneath; t != NULL; t = t->beneath)
1224 if (t->to_memory_map != NULL)
1230 result = t->to_memory_map (t);
1234 qsort (VEC_address (mem_region_s, result),
1235 VEC_length (mem_region_s, result),
1236 sizeof (struct mem_region), mem_region_cmp);
1238 /* Check that regions do not overlap. Simultaneously assign
1239 a numbering for the "mem" commands to use to refer to
1242 for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++)
1244 this_one->number = ix;
1246 if (last_one && last_one->hi > this_one->lo)
1248 warning (_("Overlapping regions in memory map: ignoring"));
1249 VEC_free (mem_region_s, result);
1252 last_one = this_one;
1259 target_flash_erase (ULONGEST address, LONGEST length)
1261 struct target_ops *t;
1263 for (t = current_target.beneath; t != NULL; t = t->beneath)
1264 if (t->to_flash_erase != NULL)
1267 fprintf_unfiltered (gdb_stdlog, "target_flash_erase (%s, %s)\n",
1268 paddr (address), phex (length, 0));
1269 t->to_flash_erase (t, address, length);
1277 target_flash_done (void)
1279 struct target_ops *t;
1281 for (t = current_target.beneath; t != NULL; t = t->beneath)
1282 if (t->to_flash_done != NULL)
1285 fprintf_unfiltered (gdb_stdlog, "target_flash_done\n");
1286 t->to_flash_done (t);
1293 #ifndef target_stopped_data_address_p
1295 target_stopped_data_address_p (struct target_ops *target)
1297 if (target->to_stopped_data_address
1298 == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero)
1300 if (target->to_stopped_data_address == debug_to_stopped_data_address
1301 && (debug_target.to_stopped_data_address
1302 == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero))
1309 show_trust_readonly (struct ui_file *file, int from_tty,
1310 struct cmd_list_element *c, const char *value)
1312 fprintf_filtered (file, _("\
1313 Mode for reading from readonly sections is %s.\n"),
1317 /* More generic transfers. */
1320 default_xfer_partial (struct target_ops *ops, enum target_object object,
1321 const char *annex, gdb_byte *readbuf,
1322 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1324 if (object == TARGET_OBJECT_MEMORY
1325 && ops->deprecated_xfer_memory != NULL)
1326 /* If available, fall back to the target's
1327 "deprecated_xfer_memory" method. */
1331 if (writebuf != NULL)
1333 void *buffer = xmalloc (len);
1334 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1335 memcpy (buffer, writebuf, len);
1336 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1337 1/*write*/, NULL, ops);
1338 do_cleanups (cleanup);
1340 if (readbuf != NULL)
1341 xfered = ops->deprecated_xfer_memory (offset, readbuf, len, 0/*read*/,
1345 else if (xfered == 0 && errno == 0)
1346 /* "deprecated_xfer_memory" uses 0, cross checked against
1347 ERRNO as one indication of an error. */
1352 else if (ops->beneath != NULL)
1353 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1354 readbuf, writebuf, offset, len);
1359 /* The xfer_partial handler for the topmost target. Unlike the default,
1360 it does not need to handle memory specially; it just passes all
1361 requests down the stack. */
1364 current_xfer_partial (struct target_ops *ops, enum target_object object,
1365 const char *annex, gdb_byte *readbuf,
1366 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1368 if (ops->beneath != NULL)
1369 return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
1370 readbuf, writebuf, offset, len);
1375 /* Target vector read/write partial wrapper functions.
1377 NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial
1378 (inbuf, outbuf)", instead of separate read/write methods, make life
1382 target_read_partial (struct target_ops *ops,
1383 enum target_object object,
1384 const char *annex, gdb_byte *buf,
1385 ULONGEST offset, LONGEST len)
1387 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1391 target_write_partial (struct target_ops *ops,
1392 enum target_object object,
1393 const char *annex, const gdb_byte *buf,
1394 ULONGEST offset, LONGEST len)
1396 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1399 /* Wrappers to perform the full transfer. */
1401 target_read (struct target_ops *ops,
1402 enum target_object object,
1403 const char *annex, gdb_byte *buf,
1404 ULONGEST offset, LONGEST len)
1407 while (xfered < len)
1409 LONGEST xfer = target_read_partial (ops, object, annex,
1410 (gdb_byte *) buf + xfered,
1411 offset + xfered, len - xfered);
1412 /* Call an observer, notifying them of the xfer progress? */
1423 /* An alternative to target_write with progress callbacks. */
1426 target_write_with_progress (struct target_ops *ops,
1427 enum target_object object,
1428 const char *annex, const gdb_byte *buf,
1429 ULONGEST offset, LONGEST len,
1430 void (*progress) (ULONGEST, void *), void *baton)
1434 /* Give the progress callback a chance to set up. */
1436 (*progress) (0, baton);
1438 while (xfered < len)
1440 LONGEST xfer = target_write_partial (ops, object, annex,
1441 (gdb_byte *) buf + xfered,
1442 offset + xfered, len - xfered);
1450 (*progress) (xfer, baton);
1459 target_write (struct target_ops *ops,
1460 enum target_object object,
1461 const char *annex, const gdb_byte *buf,
1462 ULONGEST offset, LONGEST len)
1464 return target_write_with_progress (ops, object, annex, buf, offset, len,
1468 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1469 the size of the transferred data. PADDING additional bytes are
1470 available in *BUF_P. This is a helper function for
1471 target_read_alloc; see the declaration of that function for more
1475 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1476 const char *annex, gdb_byte **buf_p, int padding)
1478 size_t buf_alloc, buf_pos;
1482 /* This function does not have a length parameter; it reads the
1483 entire OBJECT). Also, it doesn't support objects fetched partly
1484 from one target and partly from another (in a different stratum,
1485 e.g. a core file and an executable). Both reasons make it
1486 unsuitable for reading memory. */
1487 gdb_assert (object != TARGET_OBJECT_MEMORY);
1489 /* Start by reading up to 4K at a time. The target will throttle
1490 this number down if necessary. */
1492 buf = xmalloc (buf_alloc);
1496 n = target_read_partial (ops, object, annex, &buf[buf_pos],
1497 buf_pos, buf_alloc - buf_pos - padding);
1500 /* An error occurred. */
1506 /* Read all there was. */
1516 /* If the buffer is filling up, expand it. */
1517 if (buf_alloc < buf_pos * 2)
1520 buf = xrealloc (buf, buf_alloc);
1527 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1528 the size of the transferred data. See the declaration in "target.h"
1529 function for more information about the return value. */
1532 target_read_alloc (struct target_ops *ops, enum target_object object,
1533 const char *annex, gdb_byte **buf_p)
1535 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
1538 /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
1539 returned as a string, allocated using xmalloc. If an error occurs
1540 or the transfer is unsupported, NULL is returned. Empty objects
1541 are returned as allocated but empty strings. A warning is issued
1542 if the result contains any embedded NUL bytes. */
1545 target_read_stralloc (struct target_ops *ops, enum target_object object,
1549 LONGEST transferred;
1551 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
1553 if (transferred < 0)
1556 if (transferred == 0)
1557 return xstrdup ("");
1559 buffer[transferred] = 0;
1560 if (strlen (buffer) < transferred)
1561 warning (_("target object %d, annex %s, "
1562 "contained unexpected null characters"),
1563 (int) object, annex ? annex : "(none)");
1565 return (char *) buffer;
1568 /* Memory transfer methods. */
1571 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1574 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, buf, addr, len)
1576 memory_error (EIO, addr);
1580 get_target_memory_unsigned (struct target_ops *ops,
1581 CORE_ADDR addr, int len)
1583 gdb_byte buf[sizeof (ULONGEST)];
1585 gdb_assert (len <= sizeof (buf));
1586 get_target_memory (ops, addr, buf, len);
1587 return extract_unsigned_integer (buf, len);
1591 target_info (char *args, int from_tty)
1593 struct target_ops *t;
1594 int has_all_mem = 0;
1596 if (symfile_objfile != NULL)
1597 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
1599 for (t = target_stack; t != NULL; t = t->beneath)
1601 if (!t->to_has_memory)
1604 if ((int) (t->to_stratum) <= (int) dummy_stratum)
1607 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n"));
1608 printf_unfiltered ("%s:\n", t->to_longname);
1609 (t->to_files_info) (t);
1610 has_all_mem = t->to_has_all_memory;
1614 /* This function is called before any new inferior is created, e.g.
1615 by running a program, attaching, or connecting to a target.
1616 It cleans up any state from previous invocations which might
1617 change between runs. This is a subset of what target_preopen
1618 resets (things which might change between targets). */
1621 target_pre_inferior (int from_tty)
1623 invalidate_target_mem_regions ();
1625 target_clear_description ();
1628 /* This is to be called by the open routine before it does
1632 target_preopen (int from_tty)
1636 if (target_has_execution)
1639 || query (_("A program is being debugged already. Kill it? ")))
1642 error (_("Program not killed."));
1645 /* Calling target_kill may remove the target from the stack. But if
1646 it doesn't (which seems like a win for UDI), remove it now. */
1648 if (target_has_execution)
1651 target_pre_inferior (from_tty);
1654 /* Detach a target after doing deferred register stores. */
1657 target_detach (char *args, int from_tty)
1659 (current_target.to_detach) (args, from_tty);
1663 target_disconnect (char *args, int from_tty)
1665 struct target_ops *t;
1667 for (t = current_target.beneath; t != NULL; t = t->beneath)
1668 if (t->to_disconnect != NULL)
1671 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
1673 t->to_disconnect (t, args, from_tty);
1681 target_async_mask (int mask)
1683 int saved_async_masked_status = target_async_mask_value;
1684 target_async_mask_value = mask;
1685 return saved_async_masked_status;
1688 /* Look through the list of possible targets for a target that can
1692 target_follow_fork (int follow_child)
1694 struct target_ops *t;
1696 for (t = current_target.beneath; t != NULL; t = t->beneath)
1698 if (t->to_follow_fork != NULL)
1700 int retval = t->to_follow_fork (t, follow_child);
1702 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
1703 follow_child, retval);
1708 /* Some target returned a fork event, but did not know how to follow it. */
1709 internal_error (__FILE__, __LINE__,
1710 "could not find a target to follow fork");
1713 /* Look for a target which can describe architectural features, starting
1714 from TARGET. If we find one, return its description. */
1716 const struct target_desc *
1717 target_read_description (struct target_ops *target)
1719 struct target_ops *t;
1721 for (t = target; t != NULL; t = t->beneath)
1722 if (t->to_read_description != NULL)
1724 const struct target_desc *tdesc;
1726 tdesc = t->to_read_description (t);
1734 /* Look through the list of possible targets for a target that can
1735 execute a run or attach command without any other data. This is
1736 used to locate the default process stratum.
1738 Result is always valid (error() is called for errors). */
1740 static struct target_ops *
1741 find_default_run_target (char *do_mesg)
1743 struct target_ops **t;
1744 struct target_ops *runable = NULL;
1749 for (t = target_structs; t < target_structs + target_struct_size;
1752 if ((*t)->to_can_run && target_can_run (*t))
1760 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
1766 find_default_attach (char *args, int from_tty)
1768 struct target_ops *t;
1770 t = find_default_run_target ("attach");
1771 (t->to_attach) (args, from_tty);
1776 find_default_create_inferior (char *exec_file, char *allargs, char **env,
1779 struct target_ops *t;
1781 t = find_default_run_target ("run");
1782 (t->to_create_inferior) (exec_file, allargs, env, from_tty);
1787 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
1789 return (len <= TYPE_LENGTH (builtin_type_void_data_ptr));
1805 return_minus_one (void)
1811 * Resize the to_sections pointer. Also make sure that anyone that
1812 * was holding on to an old value of it gets updated.
1813 * Returns the old size.
1817 target_resize_to_sections (struct target_ops *target, int num_added)
1819 struct target_ops **t;
1820 struct section_table *old_value;
1823 old_value = target->to_sections;
1825 if (target->to_sections)
1827 old_count = target->to_sections_end - target->to_sections;
1828 target->to_sections = (struct section_table *)
1829 xrealloc ((char *) target->to_sections,
1830 (sizeof (struct section_table)) * (num_added + old_count));
1835 target->to_sections = (struct section_table *)
1836 xmalloc ((sizeof (struct section_table)) * num_added);
1838 target->to_sections_end = target->to_sections + (num_added + old_count);
1840 /* Check to see if anyone else was pointing to this structure.
1841 If old_value was null, then no one was. */
1845 for (t = target_structs; t < target_structs + target_struct_size;
1848 if ((*t)->to_sections == old_value)
1850 (*t)->to_sections = target->to_sections;
1851 (*t)->to_sections_end = target->to_sections_end;
1854 /* There is a flattened view of the target stack in current_target,
1855 so its to_sections pointer might also need updating. */
1856 if (current_target.to_sections == old_value)
1858 current_target.to_sections = target->to_sections;
1859 current_target.to_sections_end = target->to_sections_end;
1867 /* Remove all target sections taken from ABFD.
1869 Scan the current target stack for targets whose section tables
1870 refer to sections from BFD, and remove those sections. We use this
1871 when we notice that the inferior has unloaded a shared object, for
1874 remove_target_sections (bfd *abfd)
1876 struct target_ops **t;
1878 for (t = target_structs; t < target_structs + target_struct_size; t++)
1880 struct section_table *src, *dest;
1882 dest = (*t)->to_sections;
1883 for (src = (*t)->to_sections; src < (*t)->to_sections_end; src++)
1884 if (src->bfd != abfd)
1886 /* Keep this section. */
1887 if (dest < src) *dest = *src;
1891 /* If we've dropped any sections, resize the section table. */
1893 target_resize_to_sections (*t, dest - src);
1900 /* Find a single runnable target in the stack and return it. If for
1901 some reason there is more than one, return NULL. */
1904 find_run_target (void)
1906 struct target_ops **t;
1907 struct target_ops *runable = NULL;
1912 for (t = target_structs; t < target_structs + target_struct_size; ++t)
1914 if ((*t)->to_can_run && target_can_run (*t))
1921 return (count == 1 ? runable : NULL);
1924 /* Find a single core_stratum target in the list of targets and return it.
1925 If for some reason there is more than one, return NULL. */
1928 find_core_target (void)
1930 struct target_ops **t;
1931 struct target_ops *runable = NULL;
1936 for (t = target_structs; t < target_structs + target_struct_size;
1939 if ((*t)->to_stratum == core_stratum)
1946 return (count == 1 ? runable : NULL);
1950 * Find the next target down the stack from the specified target.
1954 find_target_beneath (struct target_ops *t)
1960 /* The inferior process has died. Long live the inferior! */
1963 generic_mourn_inferior (void)
1965 extern int show_breakpoint_hit_counts;
1967 inferior_ptid = null_ptid;
1969 breakpoint_init_inferior (inf_exited);
1970 registers_changed ();
1972 reopen_exec_file ();
1973 reinit_frame_cache ();
1975 /* It is confusing to the user for ignore counts to stick around
1976 from previous runs of the inferior. So clear them. */
1977 /* However, it is more confusing for the ignore counts to disappear when
1978 using hit counts. So don't clear them if we're counting hits. */
1979 if (!show_breakpoint_hit_counts)
1980 breakpoint_clear_ignore_counts ();
1982 if (deprecated_detach_hook)
1983 deprecated_detach_hook ();
1986 /* Helper function for child_wait and the derivatives of child_wait.
1987 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
1988 translation of that in OURSTATUS. */
1990 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
1992 if (WIFEXITED (hoststatus))
1994 ourstatus->kind = TARGET_WAITKIND_EXITED;
1995 ourstatus->value.integer = WEXITSTATUS (hoststatus);
1997 else if (!WIFSTOPPED (hoststatus))
1999 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
2000 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
2004 ourstatus->kind = TARGET_WAITKIND_STOPPED;
2005 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
2009 /* Returns zero to leave the inferior alone, one to interrupt it. */
2010 int (*target_activity_function) (void);
2011 int target_activity_fd;
2013 /* Convert a normal process ID to a string. Returns the string in a
2017 normal_pid_to_str (ptid_t ptid)
2019 static char buf[32];
2021 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
2025 /* Error-catcher for target_find_memory_regions */
2026 static int dummy_find_memory_regions (int (*ignore1) (), void *ignore2)
2028 error (_("No target."));
2032 /* Error-catcher for target_make_corefile_notes */
2033 static char * dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
2035 error (_("No target."));
2039 /* Set up the handful of non-empty slots needed by the dummy target
2043 init_dummy_target (void)
2045 dummy_target.to_shortname = "None";
2046 dummy_target.to_longname = "None";
2047 dummy_target.to_doc = "";
2048 dummy_target.to_attach = find_default_attach;
2049 dummy_target.to_create_inferior = find_default_create_inferior;
2050 dummy_target.to_pid_to_str = normal_pid_to_str;
2051 dummy_target.to_stratum = dummy_stratum;
2052 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
2053 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
2054 dummy_target.to_xfer_partial = default_xfer_partial;
2055 dummy_target.to_magic = OPS_MAGIC;
2059 debug_to_open (char *args, int from_tty)
2061 debug_target.to_open (args, from_tty);
2063 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
2067 debug_to_close (int quitting)
2069 target_close (&debug_target, quitting);
2070 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
2074 target_close (struct target_ops *targ, int quitting)
2076 if (targ->to_xclose != NULL)
2077 targ->to_xclose (targ, quitting);
2078 else if (targ->to_close != NULL)
2079 targ->to_close (quitting);
2083 debug_to_attach (char *args, int from_tty)
2085 debug_target.to_attach (args, from_tty);
2087 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n", args, from_tty);
2092 debug_to_post_attach (int pid)
2094 debug_target.to_post_attach (pid);
2096 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
2100 debug_to_detach (char *args, int from_tty)
2102 debug_target.to_detach (args, from_tty);
2104 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n", args, from_tty);
2108 debug_to_resume (ptid_t ptid, int step, enum target_signal siggnal)
2110 debug_target.to_resume (ptid, step, siggnal);
2112 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n", PIDGET (ptid),
2113 step ? "step" : "continue",
2114 target_signal_to_name (siggnal));
2118 debug_to_wait (ptid_t ptid, struct target_waitstatus *status)
2122 retval = debug_target.to_wait (ptid, status);
2124 fprintf_unfiltered (gdb_stdlog,
2125 "target_wait (%d, status) = %d, ", PIDGET (ptid),
2127 fprintf_unfiltered (gdb_stdlog, "status->kind = ");
2128 switch (status->kind)
2130 case TARGET_WAITKIND_EXITED:
2131 fprintf_unfiltered (gdb_stdlog, "exited, status = %d\n",
2132 status->value.integer);
2134 case TARGET_WAITKIND_STOPPED:
2135 fprintf_unfiltered (gdb_stdlog, "stopped, signal = %s\n",
2136 target_signal_to_name (status->value.sig));
2138 case TARGET_WAITKIND_SIGNALLED:
2139 fprintf_unfiltered (gdb_stdlog, "signalled, signal = %s\n",
2140 target_signal_to_name (status->value.sig));
2142 case TARGET_WAITKIND_LOADED:
2143 fprintf_unfiltered (gdb_stdlog, "loaded\n");
2145 case TARGET_WAITKIND_FORKED:
2146 fprintf_unfiltered (gdb_stdlog, "forked\n");
2148 case TARGET_WAITKIND_VFORKED:
2149 fprintf_unfiltered (gdb_stdlog, "vforked\n");
2151 case TARGET_WAITKIND_EXECD:
2152 fprintf_unfiltered (gdb_stdlog, "execd\n");
2154 case TARGET_WAITKIND_SPURIOUS:
2155 fprintf_unfiltered (gdb_stdlog, "spurious\n");
2158 fprintf_unfiltered (gdb_stdlog, "unknown???\n");
2166 debug_print_register (const char * func,
2167 struct regcache *regcache, int regno)
2169 fprintf_unfiltered (gdb_stdlog, "%s ", func);
2170 if (regno >= 0 && regno < gdbarch_num_regs (current_gdbarch)
2171 + gdbarch_num_pseudo_regs (current_gdbarch)
2172 && gdbarch_register_name (current_gdbarch, regno) != NULL
2173 && gdbarch_register_name (current_gdbarch, regno)[0] != '\0')
2174 fprintf_unfiltered (gdb_stdlog, "(%s)", gdbarch_register_name
2175 (current_gdbarch, regno));
2177 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
2180 int i, size = register_size (current_gdbarch, regno);
2181 unsigned char buf[MAX_REGISTER_SIZE];
2182 regcache_cooked_read (regcache, regno, buf);
2183 fprintf_unfiltered (gdb_stdlog, " = ");
2184 for (i = 0; i < size; i++)
2186 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
2188 if (size <= sizeof (LONGEST))
2190 ULONGEST val = extract_unsigned_integer (buf, size);
2191 fprintf_unfiltered (gdb_stdlog, " 0x%s %s",
2192 paddr_nz (val), paddr_d (val));
2195 fprintf_unfiltered (gdb_stdlog, "\n");
2199 debug_to_fetch_registers (struct regcache *regcache, int regno)
2201 debug_target.to_fetch_registers (regcache, regno);
2202 debug_print_register ("target_fetch_registers", regcache, regno);
2206 debug_to_store_registers (struct regcache *regcache, int regno)
2208 debug_target.to_store_registers (regcache, regno);
2209 debug_print_register ("target_store_registers", regcache, regno);
2210 fprintf_unfiltered (gdb_stdlog, "\n");
2214 debug_to_prepare_to_store (struct regcache *regcache)
2216 debug_target.to_prepare_to_store (regcache);
2218 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
2222 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
2223 int write, struct mem_attrib *attrib,
2224 struct target_ops *target)
2228 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
2231 fprintf_unfiltered (gdb_stdlog,
2232 "target_xfer_memory (0x%x, xxx, %d, %s, xxx) = %d",
2233 (unsigned int) memaddr, /* possable truncate long long */
2234 len, write ? "write" : "read", retval);
2240 fputs_unfiltered (", bytes =", gdb_stdlog);
2241 for (i = 0; i < retval; i++)
2243 if ((((long) &(myaddr[i])) & 0xf) == 0)
2245 if (targetdebug < 2 && i > 0)
2247 fprintf_unfiltered (gdb_stdlog, " ...");
2250 fprintf_unfiltered (gdb_stdlog, "\n");
2253 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
2257 fputc_unfiltered ('\n', gdb_stdlog);
2263 debug_to_files_info (struct target_ops *target)
2265 debug_target.to_files_info (target);
2267 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
2271 debug_to_insert_breakpoint (struct bp_target_info *bp_tgt)
2275 retval = debug_target.to_insert_breakpoint (bp_tgt);
2277 fprintf_unfiltered (gdb_stdlog,
2278 "target_insert_breakpoint (0x%lx, xxx) = %ld\n",
2279 (unsigned long) bp_tgt->placed_address,
2280 (unsigned long) retval);
2285 debug_to_remove_breakpoint (struct bp_target_info *bp_tgt)
2289 retval = debug_target.to_remove_breakpoint (bp_tgt);
2291 fprintf_unfiltered (gdb_stdlog,
2292 "target_remove_breakpoint (0x%lx, xxx) = %ld\n",
2293 (unsigned long) bp_tgt->placed_address,
2294 (unsigned long) retval);
2299 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
2303 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
2305 fprintf_unfiltered (gdb_stdlog,
2306 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
2307 (unsigned long) type,
2308 (unsigned long) cnt,
2309 (unsigned long) from_tty,
2310 (unsigned long) retval);
2315 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2319 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
2321 fprintf_unfiltered (gdb_stdlog,
2322 "TARGET_REGION_OK_FOR_HW_WATCHPOINT (%ld, %ld) = 0x%lx\n",
2323 (unsigned long) addr,
2324 (unsigned long) len,
2325 (unsigned long) retval);
2330 debug_to_stopped_by_watchpoint (void)
2334 retval = debug_target.to_stopped_by_watchpoint ();
2336 fprintf_unfiltered (gdb_stdlog,
2337 "STOPPED_BY_WATCHPOINT () = %ld\n",
2338 (unsigned long) retval);
2343 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
2347 retval = debug_target.to_stopped_data_address (target, addr);
2349 fprintf_unfiltered (gdb_stdlog,
2350 "target_stopped_data_address ([0x%lx]) = %ld\n",
2351 (unsigned long)*addr,
2352 (unsigned long)retval);
2357 debug_to_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
2361 retval = debug_target.to_insert_hw_breakpoint (bp_tgt);
2363 fprintf_unfiltered (gdb_stdlog,
2364 "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n",
2365 (unsigned long) bp_tgt->placed_address,
2366 (unsigned long) retval);
2371 debug_to_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
2375 retval = debug_target.to_remove_hw_breakpoint (bp_tgt);
2377 fprintf_unfiltered (gdb_stdlog,
2378 "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n",
2379 (unsigned long) bp_tgt->placed_address,
2380 (unsigned long) retval);
2385 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type)
2389 retval = debug_target.to_insert_watchpoint (addr, len, type);
2391 fprintf_unfiltered (gdb_stdlog,
2392 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
2393 (unsigned long) addr, len, type, (unsigned long) retval);
2398 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type)
2402 retval = debug_target.to_remove_watchpoint (addr, len, type);
2404 fprintf_unfiltered (gdb_stdlog,
2405 "target_remove_watchpoint (0x%lx, %d, %d) = %ld\n",
2406 (unsigned long) addr, len, type, (unsigned long) retval);
2411 debug_to_terminal_init (void)
2413 debug_target.to_terminal_init ();
2415 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
2419 debug_to_terminal_inferior (void)
2421 debug_target.to_terminal_inferior ();
2423 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
2427 debug_to_terminal_ours_for_output (void)
2429 debug_target.to_terminal_ours_for_output ();
2431 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
2435 debug_to_terminal_ours (void)
2437 debug_target.to_terminal_ours ();
2439 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
2443 debug_to_terminal_save_ours (void)
2445 debug_target.to_terminal_save_ours ();
2447 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
2451 debug_to_terminal_info (char *arg, int from_tty)
2453 debug_target.to_terminal_info (arg, from_tty);
2455 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
2460 debug_to_kill (void)
2462 debug_target.to_kill ();
2464 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
2468 debug_to_load (char *args, int from_tty)
2470 debug_target.to_load (args, from_tty);
2472 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
2476 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
2480 retval = debug_target.to_lookup_symbol (name, addrp);
2482 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
2488 debug_to_create_inferior (char *exec_file, char *args, char **env,
2491 debug_target.to_create_inferior (exec_file, args, env, from_tty);
2493 fprintf_unfiltered (gdb_stdlog, "target_create_inferior (%s, %s, xxx, %d)\n",
2494 exec_file, args, from_tty);
2498 debug_to_post_startup_inferior (ptid_t ptid)
2500 debug_target.to_post_startup_inferior (ptid);
2502 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
2507 debug_to_acknowledge_created_inferior (int pid)
2509 debug_target.to_acknowledge_created_inferior (pid);
2511 fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n",
2516 debug_to_insert_fork_catchpoint (int pid)
2518 debug_target.to_insert_fork_catchpoint (pid);
2520 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n",
2525 debug_to_remove_fork_catchpoint (int pid)
2529 retval = debug_target.to_remove_fork_catchpoint (pid);
2531 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
2538 debug_to_insert_vfork_catchpoint (int pid)
2540 debug_target.to_insert_vfork_catchpoint (pid);
2542 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n",
2547 debug_to_remove_vfork_catchpoint (int pid)
2551 retval = debug_target.to_remove_vfork_catchpoint (pid);
2553 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
2560 debug_to_insert_exec_catchpoint (int pid)
2562 debug_target.to_insert_exec_catchpoint (pid);
2564 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n",
2569 debug_to_remove_exec_catchpoint (int pid)
2573 retval = debug_target.to_remove_exec_catchpoint (pid);
2575 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
2582 debug_to_reported_exec_events_per_exec_call (void)
2584 int reported_exec_events;
2586 reported_exec_events = debug_target.to_reported_exec_events_per_exec_call ();
2588 fprintf_unfiltered (gdb_stdlog,
2589 "target_reported_exec_events_per_exec_call () = %d\n",
2590 reported_exec_events);
2592 return reported_exec_events;
2596 debug_to_has_exited (int pid, int wait_status, int *exit_status)
2600 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
2602 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
2603 pid, wait_status, *exit_status, has_exited);
2609 debug_to_mourn_inferior (void)
2611 debug_target.to_mourn_inferior ();
2613 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2617 debug_to_can_run (void)
2621 retval = debug_target.to_can_run ();
2623 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
2629 debug_to_notice_signals (ptid_t ptid)
2631 debug_target.to_notice_signals (ptid);
2633 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
2638 debug_to_thread_alive (ptid_t ptid)
2642 retval = debug_target.to_thread_alive (ptid);
2644 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
2645 PIDGET (ptid), retval);
2651 debug_to_find_new_threads (void)
2653 debug_target.to_find_new_threads ();
2655 fputs_unfiltered ("target_find_new_threads ()\n", gdb_stdlog);
2659 debug_to_stop (void)
2661 debug_target.to_stop ();
2663 fprintf_unfiltered (gdb_stdlog, "target_stop ()\n");
2667 debug_to_rcmd (char *command,
2668 struct ui_file *outbuf)
2670 debug_target.to_rcmd (command, outbuf);
2671 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
2674 static struct symtab_and_line *
2675 debug_to_enable_exception_callback (enum exception_event_kind kind, int enable)
2677 struct symtab_and_line *result;
2678 result = debug_target.to_enable_exception_callback (kind, enable);
2679 fprintf_unfiltered (gdb_stdlog,
2680 "target get_exception_callback_sal (%d, %d)\n",
2685 static struct exception_event_record *
2686 debug_to_get_current_exception_event (void)
2688 struct exception_event_record *result;
2689 result = debug_target.to_get_current_exception_event ();
2690 fprintf_unfiltered (gdb_stdlog, "target get_current_exception_event ()\n");
2695 debug_to_pid_to_exec_file (int pid)
2699 exec_file = debug_target.to_pid_to_exec_file (pid);
2701 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
2708 setup_target_debug (void)
2710 memcpy (&debug_target, ¤t_target, sizeof debug_target);
2712 current_target.to_open = debug_to_open;
2713 current_target.to_close = debug_to_close;
2714 current_target.to_attach = debug_to_attach;
2715 current_target.to_post_attach = debug_to_post_attach;
2716 current_target.to_detach = debug_to_detach;
2717 current_target.to_resume = debug_to_resume;
2718 current_target.to_wait = debug_to_wait;
2719 current_target.to_fetch_registers = debug_to_fetch_registers;
2720 current_target.to_store_registers = debug_to_store_registers;
2721 current_target.to_prepare_to_store = debug_to_prepare_to_store;
2722 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
2723 current_target.to_files_info = debug_to_files_info;
2724 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
2725 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
2726 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
2727 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
2728 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
2729 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
2730 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
2731 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
2732 current_target.to_stopped_data_address = debug_to_stopped_data_address;
2733 current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint;
2734 current_target.to_terminal_init = debug_to_terminal_init;
2735 current_target.to_terminal_inferior = debug_to_terminal_inferior;
2736 current_target.to_terminal_ours_for_output = debug_to_terminal_ours_for_output;
2737 current_target.to_terminal_ours = debug_to_terminal_ours;
2738 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
2739 current_target.to_terminal_info = debug_to_terminal_info;
2740 current_target.to_kill = debug_to_kill;
2741 current_target.to_load = debug_to_load;
2742 current_target.to_lookup_symbol = debug_to_lookup_symbol;
2743 current_target.to_create_inferior = debug_to_create_inferior;
2744 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
2745 current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior;
2746 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
2747 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
2748 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
2749 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
2750 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
2751 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
2752 current_target.to_reported_exec_events_per_exec_call = debug_to_reported_exec_events_per_exec_call;
2753 current_target.to_has_exited = debug_to_has_exited;
2754 current_target.to_mourn_inferior = debug_to_mourn_inferior;
2755 current_target.to_can_run = debug_to_can_run;
2756 current_target.to_notice_signals = debug_to_notice_signals;
2757 current_target.to_thread_alive = debug_to_thread_alive;
2758 current_target.to_find_new_threads = debug_to_find_new_threads;
2759 current_target.to_stop = debug_to_stop;
2760 current_target.to_rcmd = debug_to_rcmd;
2761 current_target.to_enable_exception_callback = debug_to_enable_exception_callback;
2762 current_target.to_get_current_exception_event = debug_to_get_current_exception_event;
2763 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
2767 static char targ_desc[] =
2768 "Names of targets and files being debugged.\n\
2769 Shows the entire stack of targets currently in use (including the exec-file,\n\
2770 core-file, and process, if any), as well as the symbol file name.";
2773 do_monitor_command (char *cmd,
2776 if ((current_target.to_rcmd
2777 == (void (*) (char *, struct ui_file *)) tcomplain)
2778 || (current_target.to_rcmd == debug_to_rcmd
2779 && (debug_target.to_rcmd
2780 == (void (*) (char *, struct ui_file *)) tcomplain)))
2781 error (_("\"monitor\" command not supported by this target."));
2782 target_rcmd (cmd, gdb_stdtarg);
2785 /* Print the name of each layers of our target stack. */
2788 maintenance_print_target_stack (char *cmd, int from_tty)
2790 struct target_ops *t;
2792 printf_filtered (_("The current target stack is:\n"));
2794 for (t = target_stack; t != NULL; t = t->beneath)
2796 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
2801 initialize_targets (void)
2803 init_dummy_target ();
2804 push_target (&dummy_target);
2806 add_info ("target", target_info, targ_desc);
2807 add_info ("files", target_info, targ_desc);
2809 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
2810 Set target debugging."), _("\
2811 Show target debugging."), _("\
2812 When non-zero, target debugging is enabled. Higher numbers are more\n\
2813 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
2817 &setdebuglist, &showdebuglist);
2819 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
2820 &trust_readonly, _("\
2821 Set mode for reading from readonly sections."), _("\
2822 Show mode for reading from readonly sections."), _("\
2823 When this mode is on, memory reads from readonly sections (such as .text)\n\
2824 will be read from the object file instead of from the target. This will\n\
2825 result in significant performance improvement for remote targets."),
2827 show_trust_readonly,
2828 &setlist, &showlist);
2830 add_com ("monitor", class_obscure, do_monitor_command,
2831 _("Send a command to the remote monitor (remote targets only)."));
2833 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
2834 _("Print the name of each layer of the internal target stack."),
2835 &maintenanceprintlist);
2837 target_dcache = dcache_init ();