1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2018 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "byte-vector.h"
52 static void generic_tls_error (void) ATTRIBUTE_NORETURN;
54 static void default_terminal_info (struct target_ops *, const char *, int);
56 static int default_watchpoint_addr_within_range (struct target_ops *,
57 CORE_ADDR, CORE_ADDR, int);
59 static int default_region_ok_for_hw_watchpoint (struct target_ops *,
62 static void default_rcmd (struct target_ops *, const char *, struct ui_file *);
64 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
67 static int default_follow_fork (struct target_ops *self, int follow_child,
70 static void default_mourn_inferior (struct target_ops *self);
72 static int default_search_memory (struct target_ops *ops,
74 ULONGEST search_space_len,
75 const gdb_byte *pattern,
77 CORE_ADDR *found_addrp);
79 static int default_verify_memory (struct target_ops *self,
81 CORE_ADDR memaddr, ULONGEST size);
83 static struct address_space *default_thread_address_space
84 (struct target_ops *self, ptid_t ptid);
86 static void tcomplain (void) ATTRIBUTE_NORETURN;
88 static int return_zero (struct target_ops *);
90 static int return_zero_has_execution (struct target_ops *, ptid_t);
92 static struct target_ops *find_default_run_target (const char *);
94 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
97 static int dummy_find_memory_regions (struct target_ops *self,
98 find_memory_region_ftype ignore1,
101 static char *dummy_make_corefile_notes (struct target_ops *self,
102 bfd *ignore1, int *ignore2);
104 static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid);
106 static enum exec_direction_kind default_execution_direction
107 (struct target_ops *self);
109 static struct target_ops debug_target;
111 #include "target-delegates.c"
113 static void init_dummy_target (void);
115 static void update_current_target (void);
117 /* Vector of existing target structures. */
118 typedef struct target_ops *target_ops_p;
119 DEF_VEC_P (target_ops_p);
120 static VEC (target_ops_p) *target_structs;
122 /* The initial current target, so that there is always a semi-valid
125 static struct target_ops dummy_target;
127 /* Top of target stack. */
129 static struct target_ops *target_stack;
131 /* The target structure we are currently using to talk to a process
132 or file or whatever "inferior" we have. */
134 struct target_ops current_target;
136 /* Command list for target. */
138 static struct cmd_list_element *targetlist = NULL;
140 /* Nonzero if we should trust readonly sections from the
141 executable when reading memory. */
143 static int trust_readonly = 0;
145 /* Nonzero if we should show true memory content including
146 memory breakpoint inserted by gdb. */
148 static int show_memory_breakpoints = 0;
150 /* These globals control whether GDB attempts to perform these
151 operations; they are useful for targets that need to prevent
152 inadvertant disruption, such as in non-stop mode. */
154 int may_write_registers = 1;
156 int may_write_memory = 1;
158 int may_insert_breakpoints = 1;
160 int may_insert_tracepoints = 1;
162 int may_insert_fast_tracepoints = 1;
166 /* Non-zero if we want to see trace of target level stuff. */
168 static unsigned int targetdebug = 0;
171 set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c)
173 update_current_target ();
177 show_targetdebug (struct ui_file *file, int from_tty,
178 struct cmd_list_element *c, const char *value)
180 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
183 static void setup_target_debug (void);
185 /* The user just typed 'target' without the name of a target. */
188 target_command (const char *arg, int from_tty)
190 fputs_filtered ("Argument required (target name). Try `help target'\n",
194 /* Default target_has_* methods for process_stratum targets. */
197 default_child_has_all_memory (struct target_ops *ops)
199 /* If no inferior selected, then we can't read memory here. */
200 if (ptid_equal (inferior_ptid, null_ptid))
207 default_child_has_memory (struct target_ops *ops)
209 /* If no inferior selected, then we can't read memory here. */
210 if (ptid_equal (inferior_ptid, null_ptid))
217 default_child_has_stack (struct target_ops *ops)
219 /* If no inferior selected, there's no stack. */
220 if (ptid_equal (inferior_ptid, null_ptid))
227 default_child_has_registers (struct target_ops *ops)
229 /* Can't read registers from no inferior. */
230 if (ptid_equal (inferior_ptid, null_ptid))
237 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
239 /* If there's no thread selected, then we can't make it run through
241 if (ptid_equal (the_ptid, null_ptid))
249 target_has_all_memory_1 (void)
251 struct target_ops *t;
253 for (t = current_target.beneath; t != NULL; t = t->beneath)
254 if (t->to_has_all_memory (t))
261 target_has_memory_1 (void)
263 struct target_ops *t;
265 for (t = current_target.beneath; t != NULL; t = t->beneath)
266 if (t->to_has_memory (t))
273 target_has_stack_1 (void)
275 struct target_ops *t;
277 for (t = current_target.beneath; t != NULL; t = t->beneath)
278 if (t->to_has_stack (t))
285 target_has_registers_1 (void)
287 struct target_ops *t;
289 for (t = current_target.beneath; t != NULL; t = t->beneath)
290 if (t->to_has_registers (t))
297 target_has_execution_1 (ptid_t the_ptid)
299 struct target_ops *t;
301 for (t = current_target.beneath; t != NULL; t = t->beneath)
302 if (t->to_has_execution (t, the_ptid))
309 target_has_execution_current (void)
311 return target_has_execution_1 (inferior_ptid);
314 /* Complete initialization of T. This ensures that various fields in
315 T are set, if needed by the target implementation. */
318 complete_target_initialization (struct target_ops *t)
320 /* Provide default values for all "must have" methods. */
322 if (t->to_has_all_memory == NULL)
323 t->to_has_all_memory = return_zero;
325 if (t->to_has_memory == NULL)
326 t->to_has_memory = return_zero;
328 if (t->to_has_stack == NULL)
329 t->to_has_stack = return_zero;
331 if (t->to_has_registers == NULL)
332 t->to_has_registers = return_zero;
334 if (t->to_has_execution == NULL)
335 t->to_has_execution = return_zero_has_execution;
337 /* These methods can be called on an unpushed target and so require
338 a default implementation if the target might plausibly be the
339 default run target. */
340 gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL
341 && t->to_supports_non_stop != NULL));
343 install_delegators (t);
346 /* This is used to implement the various target commands. */
349 open_target (const char *args, int from_tty, struct cmd_list_element *command)
351 struct target_ops *ops = (struct target_ops *) get_cmd_context (command);
354 fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n",
357 ops->to_open (args, from_tty);
360 fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n",
361 ops->to_shortname, args, from_tty);
364 /* Add possible target architecture T to the list and add a new
365 command 'target T->to_shortname'. Set COMPLETER as the command's
366 completer if not NULL. */
369 add_target_with_completer (struct target_ops *t,
370 completer_ftype *completer)
372 struct cmd_list_element *c;
374 complete_target_initialization (t);
376 VEC_safe_push (target_ops_p, target_structs, t);
378 if (targetlist == NULL)
379 add_prefix_cmd ("target", class_run, target_command, _("\
380 Connect to a target machine or process.\n\
381 The first argument is the type or protocol of the target machine.\n\
382 Remaining arguments are interpreted by the target protocol. For more\n\
383 information on the arguments for a particular protocol, type\n\
384 `help target ' followed by the protocol name."),
385 &targetlist, "target ", 0, &cmdlist);
386 c = add_cmd (t->to_shortname, no_class, t->to_doc, &targetlist);
387 set_cmd_sfunc (c, open_target);
388 set_cmd_context (c, t);
389 if (completer != NULL)
390 set_cmd_completer (c, completer);
393 /* Add a possible target architecture to the list. */
396 add_target (struct target_ops *t)
398 add_target_with_completer (t, NULL);
404 add_deprecated_target_alias (struct target_ops *t, const char *alias)
406 struct cmd_list_element *c;
409 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
411 c = add_cmd (alias, no_class, t->to_doc, &targetlist);
412 set_cmd_sfunc (c, open_target);
413 set_cmd_context (c, t);
414 alt = xstrprintf ("target %s", t->to_shortname);
415 deprecate_cmd (c, alt);
423 current_target.to_kill (¤t_target);
427 target_load (const char *arg, int from_tty)
429 target_dcache_invalidate ();
430 (*current_target.to_load) (¤t_target, arg, from_tty);
435 target_terminal_state target_terminal::m_terminal_state
436 = target_terminal_state::is_ours;
438 /* See target/target.h. */
441 target_terminal::init (void)
443 (*current_target.to_terminal_init) (¤t_target);
445 m_terminal_state = target_terminal_state::is_ours;
448 /* See target/target.h. */
451 target_terminal::inferior (void)
453 struct ui *ui = current_ui;
455 /* A background resume (``run&'') should leave GDB in control of the
457 if (ui->prompt_state != PROMPT_BLOCKED)
460 /* Since we always run the inferior in the main console (unless "set
461 inferior-tty" is in effect), when some UI other than the main one
462 calls target_terminal::inferior, then we leave the main UI's
463 terminal settings as is. */
467 /* If GDB is resuming the inferior in the foreground, install
468 inferior's terminal modes. */
470 struct inferior *inf = current_inferior ();
472 if (inf->terminal_state != target_terminal_state::is_inferior)
474 (*current_target.to_terminal_inferior) (¤t_target);
475 inf->terminal_state = target_terminal_state::is_inferior;
478 m_terminal_state = target_terminal_state::is_inferior;
480 /* If the user hit C-c before, pretend that it was hit right
482 if (check_quit_flag ())
483 target_pass_ctrlc ();
486 /* See target/target.h. */
489 target_terminal::restore_inferior (void)
491 struct ui *ui = current_ui;
493 /* See target_terminal::inferior(). */
494 if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui)
497 /* Restore the terminal settings of inferiors that were in the
498 foreground but are now ours_for_output due to a temporary
499 target_target::ours_for_output() call. */
502 scoped_restore_current_inferior restore_inferior;
503 struct inferior *inf;
507 if (inf->terminal_state == target_terminal_state::is_ours_for_output)
509 set_current_inferior (inf);
510 (*current_target.to_terminal_inferior) (¤t_target);
511 inf->terminal_state = target_terminal_state::is_inferior;
516 m_terminal_state = target_terminal_state::is_inferior;
518 /* If the user hit C-c before, pretend that it was hit right
520 if (check_quit_flag ())
521 target_pass_ctrlc ();
524 /* Switch terminal state to DESIRED_STATE, either is_ours, or
525 is_ours_for_output. */
528 target_terminal_is_ours_kind (target_terminal_state desired_state)
530 scoped_restore_current_inferior restore_inferior;
531 struct inferior *inf;
533 /* Must do this in two passes. First, have all inferiors save the
534 current terminal settings. Then, after all inferiors have add a
535 chance to safely save the terminal settings, restore GDB's
536 terminal settings. */
540 if (inf->terminal_state == target_terminal_state::is_inferior)
542 set_current_inferior (inf);
543 (*current_target.to_terminal_save_inferior) (¤t_target);
549 /* Note we don't check is_inferior here like above because we
550 need to handle 'is_ours_for_output -> is_ours' too. Careful
551 to never transition from 'is_ours' to 'is_ours_for_output',
553 if (inf->terminal_state != target_terminal_state::is_ours
554 && inf->terminal_state != desired_state)
556 set_current_inferior (inf);
557 if (desired_state == target_terminal_state::is_ours)
558 (*current_target.to_terminal_ours) (¤t_target);
559 else if (desired_state == target_terminal_state::is_ours_for_output)
560 (*current_target.to_terminal_ours_for_output) (¤t_target);
562 gdb_assert_not_reached ("unhandled desired state");
563 inf->terminal_state = desired_state;
568 /* See target/target.h. */
571 target_terminal::ours ()
573 struct ui *ui = current_ui;
575 /* See target_terminal::inferior. */
579 if (m_terminal_state == target_terminal_state::is_ours)
582 target_terminal_is_ours_kind (target_terminal_state::is_ours);
583 m_terminal_state = target_terminal_state::is_ours;
586 /* See target/target.h. */
589 target_terminal::ours_for_output ()
591 struct ui *ui = current_ui;
593 /* See target_terminal::inferior. */
597 if (!target_terminal::is_inferior ())
600 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output);
601 target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output;
604 /* See target/target.h. */
607 target_terminal::info (const char *arg, int from_tty)
609 (*current_target.to_terminal_info) (¤t_target, arg, from_tty);
615 target_supports_terminal_ours (void)
617 struct target_ops *t;
619 for (t = current_target.beneath; t != NULL; t = t->beneath)
621 if (t->to_terminal_ours != delegate_terminal_ours
622 && t->to_terminal_ours != tdefault_terminal_ours)
632 error (_("You can't do that when your target is `%s'"),
633 current_target.to_shortname);
639 error (_("You can't do that without a process to debug."));
643 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
645 printf_unfiltered (_("No saved terminal information.\n"));
648 /* A default implementation for the to_get_ada_task_ptid target method.
650 This function builds the PTID by using both LWP and TID as part of
651 the PTID lwp and tid elements. The pid used is the pid of the
655 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
657 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
660 static enum exec_direction_kind
661 default_execution_direction (struct target_ops *self)
663 if (!target_can_execute_reverse)
665 else if (!target_can_async_p ())
668 gdb_assert_not_reached ("\
669 to_execution_direction must be implemented for reverse async");
672 /* Go through the target stack from top to bottom, copying over zero
673 entries in current_target, then filling in still empty entries. In
674 effect, we are doing class inheritance through the pushed target
677 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
678 is currently implemented, is that it discards any knowledge of
679 which target an inherited method originally belonged to.
680 Consequently, new new target methods should instead explicitly and
681 locally search the target stack for the target that can handle the
685 update_current_target (void)
687 struct target_ops *t;
689 /* First, reset current's contents. */
690 memset (¤t_target, 0, sizeof (current_target));
692 /* Install the delegators. */
693 install_delegators (¤t_target);
695 current_target.to_stratum = target_stack->to_stratum;
697 #define INHERIT(FIELD, TARGET) \
698 if (!current_target.FIELD) \
699 current_target.FIELD = (TARGET)->FIELD
701 /* Do not add any new INHERITs here. Instead, use the delegation
702 mechanism provided by make-target-delegates. */
703 for (t = target_stack; t; t = t->beneath)
705 INHERIT (to_shortname, t);
706 INHERIT (to_longname, t);
707 INHERIT (to_attach_no_wait, t);
708 INHERIT (to_have_steppable_watchpoint, t);
709 INHERIT (to_have_continuable_watchpoint, t);
710 INHERIT (to_has_thread_control, t);
714 /* Finally, position the target-stack beneath the squashed
715 "current_target". That way code looking for a non-inherited
716 target method can quickly and simply find it. */
717 current_target.beneath = target_stack;
720 setup_target_debug ();
723 /* Push a new target type into the stack of the existing target accessors,
724 possibly superseding some of the existing accessors.
726 Rather than allow an empty stack, we always have the dummy target at
727 the bottom stratum, so we can call the function vectors without
731 push_target (struct target_ops *t)
733 struct target_ops **cur;
735 /* Check magic number. If wrong, it probably means someone changed
736 the struct definition, but not all the places that initialize one. */
737 if (t->to_magic != OPS_MAGIC)
739 fprintf_unfiltered (gdb_stderr,
740 "Magic number of %s target struct wrong\n",
742 internal_error (__FILE__, __LINE__,
743 _("failed internal consistency check"));
746 /* Find the proper stratum to install this target in. */
747 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
749 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
753 /* If there's already targets at this stratum, remove them. */
754 /* FIXME: cagney/2003-10-15: I think this should be popping all
755 targets to CUR, and not just those at this stratum level. */
756 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
758 /* There's already something at this stratum level. Close it,
759 and un-hook it from the stack. */
760 struct target_ops *tmp = (*cur);
762 (*cur) = (*cur)->beneath;
767 /* We have removed all targets in our stratum, now add the new one. */
771 update_current_target ();
774 /* Remove a target_ops vector from the stack, wherever it may be.
775 Return how many times it was removed (0 or 1). */
778 unpush_target (struct target_ops *t)
780 struct target_ops **cur;
781 struct target_ops *tmp;
783 if (t->to_stratum == dummy_stratum)
784 internal_error (__FILE__, __LINE__,
785 _("Attempt to unpush the dummy target"));
787 /* Look for the specified target. Note that we assume that a target
788 can only occur once in the target stack. */
790 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
796 /* If we don't find target_ops, quit. Only open targets should be
801 /* Unchain the target. */
803 (*cur) = (*cur)->beneath;
806 update_current_target ();
808 /* Finally close the target. Note we do this after unchaining, so
809 any target method calls from within the target_close
810 implementation don't end up in T anymore. */
816 /* Unpush TARGET and assert that it worked. */
819 unpush_target_and_assert (struct target_ops *target)
821 if (!unpush_target (target))
823 fprintf_unfiltered (gdb_stderr,
824 "pop_all_targets couldn't find target %s\n",
825 target->to_shortname);
826 internal_error (__FILE__, __LINE__,
827 _("failed internal consistency check"));
832 pop_all_targets_above (enum strata above_stratum)
834 while ((int) (current_target.to_stratum) > (int) above_stratum)
835 unpush_target_and_assert (target_stack);
841 pop_all_targets_at_and_above (enum strata stratum)
843 while ((int) (current_target.to_stratum) >= (int) stratum)
844 unpush_target_and_assert (target_stack);
848 pop_all_targets (void)
850 pop_all_targets_above (dummy_stratum);
853 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
856 target_is_pushed (struct target_ops *t)
858 struct target_ops *cur;
860 /* Check magic number. If wrong, it probably means someone changed
861 the struct definition, but not all the places that initialize one. */
862 if (t->to_magic != OPS_MAGIC)
864 fprintf_unfiltered (gdb_stderr,
865 "Magic number of %s target struct wrong\n",
867 internal_error (__FILE__, __LINE__,
868 _("failed internal consistency check"));
871 for (cur = target_stack; cur != NULL; cur = cur->beneath)
878 /* Default implementation of to_get_thread_local_address. */
881 generic_tls_error (void)
883 throw_error (TLS_GENERIC_ERROR,
884 _("Cannot find thread-local variables on this target"));
887 /* Using the objfile specified in OBJFILE, find the address for the
888 current thread's thread-local storage with offset OFFSET. */
890 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
892 volatile CORE_ADDR addr = 0;
893 struct target_ops *target = ¤t_target;
895 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
897 ptid_t ptid = inferior_ptid;
903 /* Fetch the load module address for this objfile. */
904 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
907 addr = target->to_get_thread_local_address (target, ptid,
910 /* If an error occurred, print TLS related messages here. Otherwise,
911 throw the error to some higher catcher. */
912 CATCH (ex, RETURN_MASK_ALL)
914 int objfile_is_library = (objfile->flags & OBJF_SHARED);
918 case TLS_NO_LIBRARY_SUPPORT_ERROR:
919 error (_("Cannot find thread-local variables "
920 "in this thread library."));
922 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
923 if (objfile_is_library)
924 error (_("Cannot find shared library `%s' in dynamic"
925 " linker's load module list"), objfile_name (objfile));
927 error (_("Cannot find executable file `%s' in dynamic"
928 " linker's load module list"), objfile_name (objfile));
930 case TLS_NOT_ALLOCATED_YET_ERROR:
931 if (objfile_is_library)
932 error (_("The inferior has not yet allocated storage for"
933 " thread-local variables in\n"
934 "the shared library `%s'\n"
936 objfile_name (objfile), target_pid_to_str (ptid));
938 error (_("The inferior has not yet allocated storage for"
939 " thread-local variables in\n"
940 "the executable `%s'\n"
942 objfile_name (objfile), target_pid_to_str (ptid));
944 case TLS_GENERIC_ERROR:
945 if (objfile_is_library)
946 error (_("Cannot find thread-local storage for %s, "
947 "shared library %s:\n%s"),
948 target_pid_to_str (ptid),
949 objfile_name (objfile), ex.message);
951 error (_("Cannot find thread-local storage for %s, "
952 "executable file %s:\n%s"),
953 target_pid_to_str (ptid),
954 objfile_name (objfile), ex.message);
957 throw_exception (ex);
963 /* It wouldn't be wrong here to try a gdbarch method, too; finding
964 TLS is an ABI-specific thing. But we don't do that yet. */
966 error (_("Cannot find thread-local variables on this target"));
972 target_xfer_status_to_string (enum target_xfer_status status)
974 #define CASE(X) case X: return #X
977 CASE(TARGET_XFER_E_IO);
978 CASE(TARGET_XFER_UNAVAILABLE);
987 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
989 /* target_read_string -- read a null terminated string, up to LEN bytes,
990 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
991 Set *STRING to a pointer to malloc'd memory containing the data; the caller
992 is responsible for freeing it. Return the number of bytes successfully
996 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
1002 int buffer_allocated;
1004 unsigned int nbytes_read = 0;
1006 gdb_assert (string);
1008 /* Small for testing. */
1009 buffer_allocated = 4;
1010 buffer = (char *) xmalloc (buffer_allocated);
1015 tlen = MIN (len, 4 - (memaddr & 3));
1016 offset = memaddr & 3;
1018 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
1021 /* The transfer request might have crossed the boundary to an
1022 unallocated region of memory. Retry the transfer, requesting
1026 errcode = target_read_memory (memaddr, buf, 1);
1031 if (bufptr - buffer + tlen > buffer_allocated)
1035 bytes = bufptr - buffer;
1036 buffer_allocated *= 2;
1037 buffer = (char *) xrealloc (buffer, buffer_allocated);
1038 bufptr = buffer + bytes;
1041 for (i = 0; i < tlen; i++)
1043 *bufptr++ = buf[i + offset];
1044 if (buf[i + offset] == '\000')
1046 nbytes_read += i + 1;
1053 nbytes_read += tlen;
1062 struct target_section_table *
1063 target_get_section_table (struct target_ops *target)
1065 return (*target->to_get_section_table) (target);
1068 /* Find a section containing ADDR. */
1070 struct target_section *
1071 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
1073 struct target_section_table *table = target_get_section_table (target);
1074 struct target_section *secp;
1079 for (secp = table->sections; secp < table->sections_end; secp++)
1081 if (addr >= secp->addr && addr < secp->endaddr)
1088 /* Helper for the memory xfer routines. Checks the attributes of the
1089 memory region of MEMADDR against the read or write being attempted.
1090 If the access is permitted returns true, otherwise returns false.
1091 REGION_P is an optional output parameter. If not-NULL, it is
1092 filled with a pointer to the memory region of MEMADDR. REG_LEN
1093 returns LEN trimmed to the end of the region. This is how much the
1094 caller can continue requesting, if the access is permitted. A
1095 single xfer request must not straddle memory region boundaries. */
1098 memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf,
1099 ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len,
1100 struct mem_region **region_p)
1102 struct mem_region *region;
1104 region = lookup_mem_region (memaddr);
1106 if (region_p != NULL)
1109 switch (region->attrib.mode)
1112 if (writebuf != NULL)
1117 if (readbuf != NULL)
1122 /* We only support writing to flash during "load" for now. */
1123 if (writebuf != NULL)
1124 error (_("Writing to flash memory forbidden in this context"));
1131 /* region->hi == 0 means there's no upper bound. */
1132 if (memaddr + len < region->hi || region->hi == 0)
1135 *reg_len = region->hi - memaddr;
1140 /* Read memory from more than one valid target. A core file, for
1141 instance, could have some of memory but delegate other bits to
1142 the target below it. So, we must manually try all targets. */
1144 enum target_xfer_status
1145 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1146 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1147 ULONGEST *xfered_len)
1149 enum target_xfer_status res;
1153 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1154 readbuf, writebuf, memaddr, len,
1156 if (res == TARGET_XFER_OK)
1159 /* Stop if the target reports that the memory is not available. */
1160 if (res == TARGET_XFER_UNAVAILABLE)
1163 /* We want to continue past core files to executables, but not
1164 past a running target's memory. */
1165 if (ops->to_has_all_memory (ops))
1170 while (ops != NULL);
1172 /* The cache works at the raw memory level. Make sure the cache
1173 gets updated with raw contents no matter what kind of memory
1174 object was originally being written. Note we do write-through
1175 first, so that if it fails, we don't write to the cache contents
1176 that never made it to the target. */
1177 if (writebuf != NULL
1178 && !ptid_equal (inferior_ptid, null_ptid)
1179 && target_dcache_init_p ()
1180 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1182 DCACHE *dcache = target_dcache_get ();
1184 /* Note that writing to an area of memory which wasn't present
1185 in the cache doesn't cause it to be loaded in. */
1186 dcache_update (dcache, res, memaddr, writebuf, *xfered_len);
1192 /* Perform a partial memory transfer.
1193 For docs see target.h, to_xfer_partial. */
1195 static enum target_xfer_status
1196 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1197 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1198 ULONGEST len, ULONGEST *xfered_len)
1200 enum target_xfer_status res;
1202 struct mem_region *region;
1203 struct inferior *inf;
1205 /* For accesses to unmapped overlay sections, read directly from
1206 files. Must do this first, as MEMADDR may need adjustment. */
1207 if (readbuf != NULL && overlay_debugging)
1209 struct obj_section *section = find_pc_overlay (memaddr);
1211 if (pc_in_unmapped_range (memaddr, section))
1213 struct target_section_table *table
1214 = target_get_section_table (ops);
1215 const char *section_name = section->the_bfd_section->name;
1217 memaddr = overlay_mapped_address (memaddr, section);
1218 return section_table_xfer_memory_partial (readbuf, writebuf,
1219 memaddr, len, xfered_len,
1221 table->sections_end,
1226 /* Try the executable files, if "trust-readonly-sections" is set. */
1227 if (readbuf != NULL && trust_readonly)
1229 struct target_section *secp;
1230 struct target_section_table *table;
1232 secp = target_section_by_addr (ops, memaddr);
1234 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1235 secp->the_bfd_section)
1238 table = target_get_section_table (ops);
1239 return section_table_xfer_memory_partial (readbuf, writebuf,
1240 memaddr, len, xfered_len,
1242 table->sections_end,
1247 /* Try GDB's internal data cache. */
1249 if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len,
1251 return TARGET_XFER_E_IO;
1253 if (!ptid_equal (inferior_ptid, null_ptid))
1254 inf = find_inferior_ptid (inferior_ptid);
1260 /* The dcache reads whole cache lines; that doesn't play well
1261 with reading from a trace buffer, because reading outside of
1262 the collected memory range fails. */
1263 && get_traceframe_number () == -1
1264 && (region->attrib.cache
1265 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1266 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1268 DCACHE *dcache = target_dcache_get_or_init ();
1270 return dcache_read_memory_partial (ops, dcache, memaddr, readbuf,
1271 reg_len, xfered_len);
1274 /* If none of those methods found the memory we wanted, fall back
1275 to a target partial transfer. Normally a single call to
1276 to_xfer_partial is enough; if it doesn't recognize an object
1277 it will call the to_xfer_partial of the next target down.
1278 But for memory this won't do. Memory is the only target
1279 object which can be read from more than one valid target.
1280 A core file, for instance, could have some of memory but
1281 delegate other bits to the target below it. So, we must
1282 manually try all targets. */
1284 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1287 /* If we still haven't got anything, return the last error. We
1292 /* Perform a partial memory transfer. For docs see target.h,
1295 static enum target_xfer_status
1296 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1297 gdb_byte *readbuf, const gdb_byte *writebuf,
1298 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1300 enum target_xfer_status res;
1302 /* Zero length requests are ok and require no work. */
1304 return TARGET_XFER_EOF;
1306 memaddr = address_significant (target_gdbarch (), memaddr);
1308 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1309 breakpoint insns, thus hiding out from higher layers whether
1310 there are software breakpoints inserted in the code stream. */
1311 if (readbuf != NULL)
1313 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1316 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1317 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len);
1321 /* A large write request is likely to be partially satisfied
1322 by memory_xfer_partial_1. We will continually malloc
1323 and free a copy of the entire write request for breakpoint
1324 shadow handling even though we only end up writing a small
1325 subset of it. Cap writes to a limit specified by the target
1326 to mitigate this. */
1327 len = std::min (ops->to_get_memory_xfer_limit (ops), len);
1329 gdb::byte_vector buf (writebuf, writebuf + len);
1330 breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len);
1331 res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len,
1338 scoped_restore_tmpl<int>
1339 make_scoped_restore_show_memory_breakpoints (int show)
1341 return make_scoped_restore (&show_memory_breakpoints, show);
1344 /* For docs see target.h, to_xfer_partial. */
1346 enum target_xfer_status
1347 target_xfer_partial (struct target_ops *ops,
1348 enum target_object object, const char *annex,
1349 gdb_byte *readbuf, const gdb_byte *writebuf,
1350 ULONGEST offset, ULONGEST len,
1351 ULONGEST *xfered_len)
1353 enum target_xfer_status retval;
1355 gdb_assert (ops->to_xfer_partial != NULL);
1357 /* Transfer is done when LEN is zero. */
1359 return TARGET_XFER_EOF;
1361 if (writebuf && !may_write_memory)
1362 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1363 core_addr_to_string_nz (offset), plongest (len));
1367 /* If this is a memory transfer, let the memory-specific code
1368 have a look at it instead. Memory transfers are more
1370 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1371 || object == TARGET_OBJECT_CODE_MEMORY)
1372 retval = memory_xfer_partial (ops, object, readbuf,
1373 writebuf, offset, len, xfered_len);
1374 else if (object == TARGET_OBJECT_RAW_MEMORY)
1376 /* Skip/avoid accessing the target if the memory region
1377 attributes block the access. Check this here instead of in
1378 raw_memory_xfer_partial as otherwise we'd end up checking
1379 this twice in the case of the memory_xfer_partial path is
1380 taken; once before checking the dcache, and another in the
1381 tail call to raw_memory_xfer_partial. */
1382 if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len,
1384 return TARGET_XFER_E_IO;
1386 /* Request the normal memory object from other layers. */
1387 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1391 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1392 writebuf, offset, len, xfered_len);
1396 const unsigned char *myaddr = NULL;
1398 fprintf_unfiltered (gdb_stdlog,
1399 "%s:target_xfer_partial "
1400 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1403 (annex ? annex : "(null)"),
1404 host_address_to_string (readbuf),
1405 host_address_to_string (writebuf),
1406 core_addr_to_string_nz (offset),
1407 pulongest (len), retval,
1408 pulongest (*xfered_len));
1414 if (retval == TARGET_XFER_OK && myaddr != NULL)
1418 fputs_unfiltered (", bytes =", gdb_stdlog);
1419 for (i = 0; i < *xfered_len; i++)
1421 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1423 if (targetdebug < 2 && i > 0)
1425 fprintf_unfiltered (gdb_stdlog, " ...");
1428 fprintf_unfiltered (gdb_stdlog, "\n");
1431 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1435 fputc_unfiltered ('\n', gdb_stdlog);
1438 /* Check implementations of to_xfer_partial update *XFERED_LEN
1439 properly. Do assertion after printing debug messages, so that we
1440 can find more clues on assertion failure from debugging messages. */
1441 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE)
1442 gdb_assert (*xfered_len > 0);
1447 /* Read LEN bytes of target memory at address MEMADDR, placing the
1448 results in GDB's memory at MYADDR. Returns either 0 for success or
1449 -1 if any error occurs.
1451 If an error occurs, no guarantee is made about the contents of the data at
1452 MYADDR. In particular, the caller should not depend upon partial reads
1453 filling the buffer with good data. There is no way for the caller to know
1454 how much good data might have been transfered anyway. Callers that can
1455 deal with partial reads should call target_read (which will retry until
1456 it makes no progress, and then return how much was transferred). */
1459 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1461 /* Dispatch to the topmost target, not the flattened current_target.
1462 Memory accesses check target->to_has_(all_)memory, and the
1463 flattened target doesn't inherit those. */
1464 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1465 myaddr, memaddr, len) == len)
1471 /* See target/target.h. */
1474 target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
1479 r = target_read_memory (memaddr, buf, sizeof buf);
1482 *result = extract_unsigned_integer (buf, sizeof buf,
1483 gdbarch_byte_order (target_gdbarch ()));
1487 /* Like target_read_memory, but specify explicitly that this is a read
1488 from the target's raw memory. That is, this read bypasses the
1489 dcache, breakpoint shadowing, etc. */
1492 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1494 /* See comment in target_read_memory about why the request starts at
1495 current_target.beneath. */
1496 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1497 myaddr, memaddr, len) == len)
1503 /* Like target_read_memory, but specify explicitly that this is a read from
1504 the target's stack. This may trigger different cache behavior. */
1507 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1509 /* See comment in target_read_memory about why the request starts at
1510 current_target.beneath. */
1511 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1512 myaddr, memaddr, len) == len)
1518 /* Like target_read_memory, but specify explicitly that this is a read from
1519 the target's code. This may trigger different cache behavior. */
1522 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1524 /* See comment in target_read_memory about why the request starts at
1525 current_target.beneath. */
1526 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1527 myaddr, memaddr, len) == len)
1533 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1534 Returns either 0 for success or -1 if any error occurs. If an
1535 error occurs, no guarantee is made about how much data got written.
1536 Callers that can deal with partial writes should call
1540 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1542 /* See comment in target_read_memory about why the request starts at
1543 current_target.beneath. */
1544 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1545 myaddr, memaddr, len) == len)
1551 /* Write LEN bytes from MYADDR to target raw memory at address
1552 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1553 If an error occurs, no guarantee is made about how much data got
1554 written. Callers that can deal with partial writes should call
1558 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1560 /* See comment in target_read_memory about why the request starts at
1561 current_target.beneath. */
1562 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1563 myaddr, memaddr, len) == len)
1569 /* Fetch the target's memory map. */
1571 std::vector<mem_region>
1572 target_memory_map (void)
1574 std::vector<mem_region> result
1575 = current_target.to_memory_map (¤t_target);
1576 if (result.empty ())
1579 std::sort (result.begin (), result.end ());
1581 /* Check that regions do not overlap. Simultaneously assign
1582 a numbering for the "mem" commands to use to refer to
1584 mem_region *last_one = NULL;
1585 for (size_t ix = 0; ix < result.size (); ix++)
1587 mem_region *this_one = &result[ix];
1588 this_one->number = ix;
1590 if (last_one != NULL && last_one->hi > this_one->lo)
1592 warning (_("Overlapping regions in memory map: ignoring"));
1593 return std::vector<mem_region> ();
1596 last_one = this_one;
1603 target_flash_erase (ULONGEST address, LONGEST length)
1605 current_target.to_flash_erase (¤t_target, address, length);
1609 target_flash_done (void)
1611 current_target.to_flash_done (¤t_target);
1615 show_trust_readonly (struct ui_file *file, int from_tty,
1616 struct cmd_list_element *c, const char *value)
1618 fprintf_filtered (file,
1619 _("Mode for reading from readonly sections is %s.\n"),
1623 /* Target vector read/write partial wrapper functions. */
1625 static enum target_xfer_status
1626 target_read_partial (struct target_ops *ops,
1627 enum target_object object,
1628 const char *annex, gdb_byte *buf,
1629 ULONGEST offset, ULONGEST len,
1630 ULONGEST *xfered_len)
1632 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1636 static enum target_xfer_status
1637 target_write_partial (struct target_ops *ops,
1638 enum target_object object,
1639 const char *annex, const gdb_byte *buf,
1640 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1642 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1646 /* Wrappers to perform the full transfer. */
1648 /* For docs on target_read see target.h. */
1651 target_read (struct target_ops *ops,
1652 enum target_object object,
1653 const char *annex, gdb_byte *buf,
1654 ULONGEST offset, LONGEST len)
1656 LONGEST xfered_total = 0;
1659 /* If we are reading from a memory object, find the length of an addressable
1660 unit for that architecture. */
1661 if (object == TARGET_OBJECT_MEMORY
1662 || object == TARGET_OBJECT_STACK_MEMORY
1663 || object == TARGET_OBJECT_CODE_MEMORY
1664 || object == TARGET_OBJECT_RAW_MEMORY)
1665 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1667 while (xfered_total < len)
1669 ULONGEST xfered_partial;
1670 enum target_xfer_status status;
1672 status = target_read_partial (ops, object, annex,
1673 buf + xfered_total * unit_size,
1674 offset + xfered_total, len - xfered_total,
1677 /* Call an observer, notifying them of the xfer progress? */
1678 if (status == TARGET_XFER_EOF)
1679 return xfered_total;
1680 else if (status == TARGET_XFER_OK)
1682 xfered_total += xfered_partial;
1686 return TARGET_XFER_E_IO;
1692 /* Assuming that the entire [begin, end) range of memory cannot be
1693 read, try to read whatever subrange is possible to read.
1695 The function returns, in RESULT, either zero or one memory block.
1696 If there's a readable subrange at the beginning, it is completely
1697 read and returned. Any further readable subrange will not be read.
1698 Otherwise, if there's a readable subrange at the end, it will be
1699 completely read and returned. Any readable subranges before it
1700 (obviously, not starting at the beginning), will be ignored. In
1701 other cases -- either no readable subrange, or readable subrange(s)
1702 that is neither at the beginning, or end, nothing is returned.
1704 The purpose of this function is to handle a read across a boundary
1705 of accessible memory in a case when memory map is not available.
1706 The above restrictions are fine for this case, but will give
1707 incorrect results if the memory is 'patchy'. However, supporting
1708 'patchy' memory would require trying to read every single byte,
1709 and it seems unacceptable solution. Explicit memory map is
1710 recommended for this case -- and target_read_memory_robust will
1711 take care of reading multiple ranges then. */
1714 read_whatever_is_readable (struct target_ops *ops,
1715 const ULONGEST begin, const ULONGEST end,
1717 std::vector<memory_read_result> *result)
1719 ULONGEST current_begin = begin;
1720 ULONGEST current_end = end;
1722 ULONGEST xfered_len;
1724 /* If we previously failed to read 1 byte, nothing can be done here. */
1725 if (end - begin <= 1)
1728 gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin));
1730 /* Check that either first or the last byte is readable, and give up
1731 if not. This heuristic is meant to permit reading accessible memory
1732 at the boundary of accessible region. */
1733 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1734 buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK)
1739 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1740 buf.get () + (end - begin) - 1, end - 1, 1,
1741 &xfered_len) == TARGET_XFER_OK)
1749 /* Loop invariant is that the [current_begin, current_end) was previously
1750 found to be not readable as a whole.
1752 Note loop condition -- if the range has 1 byte, we can't divide the range
1753 so there's no point trying further. */
1754 while (current_end - current_begin > 1)
1756 ULONGEST first_half_begin, first_half_end;
1757 ULONGEST second_half_begin, second_half_end;
1759 ULONGEST middle = current_begin + (current_end - current_begin) / 2;
1763 first_half_begin = current_begin;
1764 first_half_end = middle;
1765 second_half_begin = middle;
1766 second_half_end = current_end;
1770 first_half_begin = middle;
1771 first_half_end = current_end;
1772 second_half_begin = current_begin;
1773 second_half_end = middle;
1776 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1777 buf.get () + (first_half_begin - begin) * unit_size,
1779 first_half_end - first_half_begin);
1781 if (xfer == first_half_end - first_half_begin)
1783 /* This half reads up fine. So, the error must be in the
1785 current_begin = second_half_begin;
1786 current_end = second_half_end;
1790 /* This half is not readable. Because we've tried one byte, we
1791 know some part of this half if actually readable. Go to the next
1792 iteration to divide again and try to read.
1794 We don't handle the other half, because this function only tries
1795 to read a single readable subrange. */
1796 current_begin = first_half_begin;
1797 current_end = first_half_end;
1803 /* The [begin, current_begin) range has been read. */
1804 result->emplace_back (begin, current_end, std::move (buf));
1808 /* The [current_end, end) range has been read. */
1809 LONGEST region_len = end - current_end;
1811 gdb::unique_xmalloc_ptr<gdb_byte> data
1812 ((gdb_byte *) xmalloc (region_len * unit_size));
1813 memcpy (data.get (), buf.get () + (current_end - begin) * unit_size,
1814 region_len * unit_size);
1815 result->emplace_back (current_end, end, std::move (data));
1819 std::vector<memory_read_result>
1820 read_memory_robust (struct target_ops *ops,
1821 const ULONGEST offset, const LONGEST len)
1823 std::vector<memory_read_result> result;
1824 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1826 LONGEST xfered_total = 0;
1827 while (xfered_total < len)
1829 struct mem_region *region = lookup_mem_region (offset + xfered_total);
1832 /* If there is no explicit region, a fake one should be created. */
1833 gdb_assert (region);
1835 if (region->hi == 0)
1836 region_len = len - xfered_total;
1838 region_len = region->hi - offset;
1840 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1842 /* Cannot read this region. Note that we can end up here only
1843 if the region is explicitly marked inaccessible, or
1844 'inaccessible-by-default' is in effect. */
1845 xfered_total += region_len;
1849 LONGEST to_read = std::min (len - xfered_total, region_len);
1850 gdb::unique_xmalloc_ptr<gdb_byte> buffer
1851 ((gdb_byte *) xmalloc (to_read * unit_size));
1853 LONGEST xfered_partial =
1854 target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (),
1855 offset + xfered_total, to_read);
1856 /* Call an observer, notifying them of the xfer progress? */
1857 if (xfered_partial <= 0)
1859 /* Got an error reading full chunk. See if maybe we can read
1861 read_whatever_is_readable (ops, offset + xfered_total,
1862 offset + xfered_total + to_read,
1863 unit_size, &result);
1864 xfered_total += to_read;
1868 result.emplace_back (offset + xfered_total,
1869 offset + xfered_total + xfered_partial,
1870 std::move (buffer));
1871 xfered_total += xfered_partial;
1881 /* An alternative to target_write with progress callbacks. */
1884 target_write_with_progress (struct target_ops *ops,
1885 enum target_object object,
1886 const char *annex, const gdb_byte *buf,
1887 ULONGEST offset, LONGEST len,
1888 void (*progress) (ULONGEST, void *), void *baton)
1890 LONGEST xfered_total = 0;
1893 /* If we are writing to a memory object, find the length of an addressable
1894 unit for that architecture. */
1895 if (object == TARGET_OBJECT_MEMORY
1896 || object == TARGET_OBJECT_STACK_MEMORY
1897 || object == TARGET_OBJECT_CODE_MEMORY
1898 || object == TARGET_OBJECT_RAW_MEMORY)
1899 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1901 /* Give the progress callback a chance to set up. */
1903 (*progress) (0, baton);
1905 while (xfered_total < len)
1907 ULONGEST xfered_partial;
1908 enum target_xfer_status status;
1910 status = target_write_partial (ops, object, annex,
1911 buf + xfered_total * unit_size,
1912 offset + xfered_total, len - xfered_total,
1915 if (status != TARGET_XFER_OK)
1916 return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO;
1919 (*progress) (xfered_partial, baton);
1921 xfered_total += xfered_partial;
1927 /* For docs on target_write see target.h. */
1930 target_write (struct target_ops *ops,
1931 enum target_object object,
1932 const char *annex, const gdb_byte *buf,
1933 ULONGEST offset, LONGEST len)
1935 return target_write_with_progress (ops, object, annex, buf, offset, len,
1939 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1940 the size of the transferred data. PADDING additional bytes are
1941 available in *BUF_P. This is a helper function for
1942 target_read_alloc; see the declaration of that function for more
1946 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1947 const char *annex, gdb_byte **buf_p, int padding)
1949 size_t buf_alloc, buf_pos;
1952 /* This function does not have a length parameter; it reads the
1953 entire OBJECT). Also, it doesn't support objects fetched partly
1954 from one target and partly from another (in a different stratum,
1955 e.g. a core file and an executable). Both reasons make it
1956 unsuitable for reading memory. */
1957 gdb_assert (object != TARGET_OBJECT_MEMORY);
1959 /* Start by reading up to 4K at a time. The target will throttle
1960 this number down if necessary. */
1962 buf = (gdb_byte *) xmalloc (buf_alloc);
1966 ULONGEST xfered_len;
1967 enum target_xfer_status status;
1969 status = target_read_partial (ops, object, annex, &buf[buf_pos],
1970 buf_pos, buf_alloc - buf_pos - padding,
1973 if (status == TARGET_XFER_EOF)
1975 /* Read all there was. */
1982 else if (status != TARGET_XFER_OK)
1984 /* An error occurred. */
1986 return TARGET_XFER_E_IO;
1989 buf_pos += xfered_len;
1991 /* If the buffer is filling up, expand it. */
1992 if (buf_alloc < buf_pos * 2)
1995 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
2002 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
2003 the size of the transferred data. See the declaration in "target.h"
2004 function for more information about the return value. */
2007 target_read_alloc (struct target_ops *ops, enum target_object object,
2008 const char *annex, gdb_byte **buf_p)
2010 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
2015 gdb::unique_xmalloc_ptr<char>
2016 target_read_stralloc (struct target_ops *ops, enum target_object object,
2021 LONGEST i, transferred;
2023 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
2024 bufstr = (char *) buffer;
2026 if (transferred < 0)
2029 if (transferred == 0)
2030 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
2032 bufstr[transferred] = 0;
2034 /* Check for embedded NUL bytes; but allow trailing NULs. */
2035 for (i = strlen (bufstr); i < transferred; i++)
2038 warning (_("target object %d, annex %s, "
2039 "contained unexpected null characters"),
2040 (int) object, annex ? annex : "(none)");
2044 return gdb::unique_xmalloc_ptr<char> (bufstr);
2047 /* Memory transfer methods. */
2050 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
2053 /* This method is used to read from an alternate, non-current
2054 target. This read must bypass the overlay support (as symbols
2055 don't match this target), and GDB's internal cache (wrong cache
2056 for this target). */
2057 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
2059 memory_error (TARGET_XFER_E_IO, addr);
2063 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
2064 int len, enum bfd_endian byte_order)
2066 gdb_byte buf[sizeof (ULONGEST)];
2068 gdb_assert (len <= sizeof (buf));
2069 get_target_memory (ops, addr, buf, len);
2070 return extract_unsigned_integer (buf, len, byte_order);
2076 target_insert_breakpoint (struct gdbarch *gdbarch,
2077 struct bp_target_info *bp_tgt)
2079 if (!may_insert_breakpoints)
2081 warning (_("May not insert breakpoints"));
2085 return current_target.to_insert_breakpoint (¤t_target,
2092 target_remove_breakpoint (struct gdbarch *gdbarch,
2093 struct bp_target_info *bp_tgt,
2094 enum remove_bp_reason reason)
2096 /* This is kind of a weird case to handle, but the permission might
2097 have been changed after breakpoints were inserted - in which case
2098 we should just take the user literally and assume that any
2099 breakpoints should be left in place. */
2100 if (!may_insert_breakpoints)
2102 warning (_("May not remove breakpoints"));
2106 return current_target.to_remove_breakpoint (¤t_target,
2107 gdbarch, bp_tgt, reason);
2111 info_target_command (const char *args, int from_tty)
2113 struct target_ops *t;
2114 int has_all_mem = 0;
2116 if (symfile_objfile != NULL)
2117 printf_unfiltered (_("Symbols from \"%s\".\n"),
2118 objfile_name (symfile_objfile));
2120 for (t = target_stack; t != NULL; t = t->beneath)
2122 if (!(*t->to_has_memory) (t))
2125 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2128 printf_unfiltered (_("\tWhile running this, "
2129 "GDB does not access memory from...\n"));
2130 printf_unfiltered ("%s:\n", t->to_longname);
2131 (t->to_files_info) (t);
2132 has_all_mem = (*t->to_has_all_memory) (t);
2136 /* This function is called before any new inferior is created, e.g.
2137 by running a program, attaching, or connecting to a target.
2138 It cleans up any state from previous invocations which might
2139 change between runs. This is a subset of what target_preopen
2140 resets (things which might change between targets). */
2143 target_pre_inferior (int from_tty)
2145 /* Clear out solib state. Otherwise the solib state of the previous
2146 inferior might have survived and is entirely wrong for the new
2147 target. This has been observed on GNU/Linux using glibc 2.3. How
2159 Cannot access memory at address 0xdeadbeef
2162 /* In some OSs, the shared library list is the same/global/shared
2163 across inferiors. If code is shared between processes, so are
2164 memory regions and features. */
2165 if (!gdbarch_has_global_solist (target_gdbarch ()))
2167 no_shared_libraries (NULL, from_tty);
2169 invalidate_target_mem_regions ();
2171 target_clear_description ();
2174 /* attach_flag may be set if the previous process associated with
2175 the inferior was attached to. */
2176 current_inferior ()->attach_flag = 0;
2178 current_inferior ()->highest_thread_num = 0;
2180 agent_capability_invalidate ();
2183 /* Callback for iterate_over_inferiors. Gets rid of the given
2187 dispose_inferior (struct inferior *inf, void *args)
2189 struct thread_info *thread;
2191 thread = any_thread_of_process (inf->pid);
2194 switch_to_thread (thread->ptid);
2196 /* Core inferiors actually should be detached, not killed. */
2197 if (target_has_execution)
2200 target_detach (inf, 0);
2206 /* This is to be called by the open routine before it does
2210 target_preopen (int from_tty)
2214 if (have_inferiors ())
2217 || !have_live_inferiors ()
2218 || query (_("A program is being debugged already. Kill it? ")))
2219 iterate_over_inferiors (dispose_inferior, NULL);
2221 error (_("Program not killed."));
2224 /* Calling target_kill may remove the target from the stack. But if
2225 it doesn't (which seems like a win for UDI), remove it now. */
2226 /* Leave the exec target, though. The user may be switching from a
2227 live process to a core of the same program. */
2228 pop_all_targets_above (file_stratum);
2230 target_pre_inferior (from_tty);
2236 target_detach (inferior *inf, int from_tty)
2238 /* As long as some to_detach implementations rely on the current_inferior
2239 (either directly, or indirectly, like through target_gdbarch or by
2240 reading memory), INF needs to be the current inferior. When that
2241 requirement will become no longer true, then we can remove this
2243 gdb_assert (inf == current_inferior ());
2245 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2246 /* Don't remove global breakpoints here. They're removed on
2247 disconnection from the target. */
2250 /* If we're in breakpoints-always-inserted mode, have to remove
2251 them before detaching. */
2252 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2254 prepare_for_detach ();
2256 current_target.to_detach (¤t_target, inf, from_tty);
2260 target_disconnect (const char *args, int from_tty)
2262 /* If we're in breakpoints-always-inserted mode or if breakpoints
2263 are global across processes, we have to remove them before
2265 remove_breakpoints ();
2267 current_target.to_disconnect (¤t_target, args, from_tty);
2270 /* See target/target.h. */
2273 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2275 return (current_target.to_wait) (¤t_target, ptid, status, options);
2281 default_target_wait (struct target_ops *ops,
2282 ptid_t ptid, struct target_waitstatus *status,
2285 status->kind = TARGET_WAITKIND_IGNORE;
2286 return minus_one_ptid;
2290 target_pid_to_str (ptid_t ptid)
2292 return (*current_target.to_pid_to_str) (¤t_target, ptid);
2296 target_thread_name (struct thread_info *info)
2298 return current_target.to_thread_name (¤t_target, info);
2301 struct thread_info *
2302 target_thread_handle_to_thread_info (const gdb_byte *thread_handle,
2304 struct inferior *inf)
2306 return current_target.to_thread_handle_to_thread_info
2307 (¤t_target, thread_handle, handle_len, inf);
2311 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2313 target_dcache_invalidate ();
2315 current_target.to_resume (¤t_target, ptid, step, signal);
2317 registers_changed_ptid (ptid);
2318 /* We only set the internal executing state here. The user/frontend
2319 running state is set at a higher level. */
2320 set_executing (ptid, 1);
2321 clear_inline_frame_state (ptid);
2324 /* If true, target_commit_resume is a nop. */
2325 static int defer_target_commit_resume;
2330 target_commit_resume (void)
2332 if (defer_target_commit_resume)
2335 current_target.to_commit_resume (¤t_target);
2340 scoped_restore_tmpl<int>
2341 make_scoped_defer_target_commit_resume ()
2343 return make_scoped_restore (&defer_target_commit_resume, 1);
2347 target_pass_signals (int numsigs, unsigned char *pass_signals)
2349 (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals);
2353 target_program_signals (int numsigs, unsigned char *program_signals)
2355 (*current_target.to_program_signals) (¤t_target,
2356 numsigs, program_signals);
2360 default_follow_fork (struct target_ops *self, int follow_child,
2363 /* Some target returned a fork event, but did not know how to follow it. */
2364 internal_error (__FILE__, __LINE__,
2365 _("could not find a target to follow fork"));
2368 /* Look through the list of possible targets for a target that can
2372 target_follow_fork (int follow_child, int detach_fork)
2374 return current_target.to_follow_fork (¤t_target,
2375 follow_child, detach_fork);
2378 /* Target wrapper for follow exec hook. */
2381 target_follow_exec (struct inferior *inf, char *execd_pathname)
2383 current_target.to_follow_exec (¤t_target, inf, execd_pathname);
2387 default_mourn_inferior (struct target_ops *self)
2389 internal_error (__FILE__, __LINE__,
2390 _("could not find a target to follow mourn inferior"));
2394 target_mourn_inferior (ptid_t ptid)
2396 gdb_assert (ptid_equal (ptid, inferior_ptid));
2397 current_target.to_mourn_inferior (¤t_target);
2399 /* We no longer need to keep handles on any of the object files.
2400 Make sure to release them to avoid unnecessarily locking any
2401 of them while we're not actually debugging. */
2402 bfd_cache_close_all ();
2405 /* Look for a target which can describe architectural features, starting
2406 from TARGET. If we find one, return its description. */
2408 const struct target_desc *
2409 target_read_description (struct target_ops *target)
2411 return target->to_read_description (target);
2414 /* This implements a basic search of memory, reading target memory and
2415 performing the search here (as opposed to performing the search in on the
2416 target side with, for example, gdbserver). */
2419 simple_search_memory (struct target_ops *ops,
2420 CORE_ADDR start_addr, ULONGEST search_space_len,
2421 const gdb_byte *pattern, ULONGEST pattern_len,
2422 CORE_ADDR *found_addrp)
2424 /* NOTE: also defined in find.c testcase. */
2425 #define SEARCH_CHUNK_SIZE 16000
2426 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2427 /* Buffer to hold memory contents for searching. */
2428 unsigned search_buf_size;
2430 search_buf_size = chunk_size + pattern_len - 1;
2432 /* No point in trying to allocate a buffer larger than the search space. */
2433 if (search_space_len < search_buf_size)
2434 search_buf_size = search_space_len;
2436 gdb::byte_vector search_buf (search_buf_size);
2438 /* Prime the search buffer. */
2440 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2441 search_buf.data (), start_addr, search_buf_size)
2444 warning (_("Unable to access %s bytes of target "
2445 "memory at %s, halting search."),
2446 pulongest (search_buf_size), hex_string (start_addr));
2450 /* Perform the search.
2452 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2453 When we've scanned N bytes we copy the trailing bytes to the start and
2454 read in another N bytes. */
2456 while (search_space_len >= pattern_len)
2458 gdb_byte *found_ptr;
2459 unsigned nr_search_bytes
2460 = std::min (search_space_len, (ULONGEST) search_buf_size);
2462 found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes,
2463 pattern, pattern_len);
2465 if (found_ptr != NULL)
2467 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ());
2469 *found_addrp = found_addr;
2473 /* Not found in this chunk, skip to next chunk. */
2475 /* Don't let search_space_len wrap here, it's unsigned. */
2476 if (search_space_len >= chunk_size)
2477 search_space_len -= chunk_size;
2479 search_space_len = 0;
2481 if (search_space_len >= pattern_len)
2483 unsigned keep_len = search_buf_size - chunk_size;
2484 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2487 /* Copy the trailing part of the previous iteration to the front
2488 of the buffer for the next iteration. */
2489 gdb_assert (keep_len == pattern_len - 1);
2490 memcpy (&search_buf[0], &search_buf[chunk_size], keep_len);
2492 nr_to_read = std::min (search_space_len - keep_len,
2493 (ULONGEST) chunk_size);
2495 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2496 &search_buf[keep_len], read_addr,
2497 nr_to_read) != nr_to_read)
2499 warning (_("Unable to access %s bytes of target "
2500 "memory at %s, halting search."),
2501 plongest (nr_to_read),
2502 hex_string (read_addr));
2506 start_addr += chunk_size;
2515 /* Default implementation of memory-searching. */
2518 default_search_memory (struct target_ops *self,
2519 CORE_ADDR start_addr, ULONGEST search_space_len,
2520 const gdb_byte *pattern, ULONGEST pattern_len,
2521 CORE_ADDR *found_addrp)
2523 /* Start over from the top of the target stack. */
2524 return simple_search_memory (current_target.beneath,
2525 start_addr, search_space_len,
2526 pattern, pattern_len, found_addrp);
2529 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2530 sequence of bytes in PATTERN with length PATTERN_LEN.
2532 The result is 1 if found, 0 if not found, and -1 if there was an error
2533 requiring halting of the search (e.g. memory read error).
2534 If the pattern is found the address is recorded in FOUND_ADDRP. */
2537 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2538 const gdb_byte *pattern, ULONGEST pattern_len,
2539 CORE_ADDR *found_addrp)
2541 return current_target.to_search_memory (¤t_target, start_addr,
2543 pattern, pattern_len, found_addrp);
2546 /* Look through the currently pushed targets. If none of them will
2547 be able to restart the currently running process, issue an error
2551 target_require_runnable (void)
2553 struct target_ops *t;
2555 for (t = target_stack; t != NULL; t = t->beneath)
2557 /* If this target knows how to create a new program, then
2558 assume we will still be able to after killing the current
2559 one. Either killing and mourning will not pop T, or else
2560 find_default_run_target will find it again. */
2561 if (t->to_create_inferior != NULL)
2564 /* Do not worry about targets at certain strata that can not
2565 create inferiors. Assume they will be pushed again if
2566 necessary, and continue to the process_stratum. */
2567 if (t->to_stratum == thread_stratum
2568 || t->to_stratum == record_stratum
2569 || t->to_stratum == arch_stratum)
2572 error (_("The \"%s\" target does not support \"run\". "
2573 "Try \"help target\" or \"continue\"."),
2577 /* This function is only called if the target is running. In that
2578 case there should have been a process_stratum target and it
2579 should either know how to create inferiors, or not... */
2580 internal_error (__FILE__, __LINE__, _("No targets found"));
2583 /* Whether GDB is allowed to fall back to the default run target for
2584 "run", "attach", etc. when no target is connected yet. */
2585 static int auto_connect_native_target = 1;
2588 show_auto_connect_native_target (struct ui_file *file, int from_tty,
2589 struct cmd_list_element *c, const char *value)
2591 fprintf_filtered (file,
2592 _("Whether GDB may automatically connect to the "
2593 "native target is %s.\n"),
2597 /* Look through the list of possible targets for a target that can
2598 execute a run or attach command without any other data. This is
2599 used to locate the default process stratum.
2601 If DO_MESG is not NULL, the result is always valid (error() is
2602 called for errors); else, return NULL on error. */
2604 static struct target_ops *
2605 find_default_run_target (const char *do_mesg)
2607 struct target_ops *runable = NULL;
2609 if (auto_connect_native_target)
2611 struct target_ops *t;
2615 for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i)
2617 if (t->to_can_run != delegate_can_run && target_can_run (t))
2628 if (runable == NULL)
2631 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2642 find_attach_target (void)
2644 struct target_ops *t;
2646 /* If a target on the current stack can attach, use it. */
2647 for (t = current_target.beneath; t != NULL; t = t->beneath)
2649 if (t->to_attach != NULL)
2653 /* Otherwise, use the default run target for attaching. */
2655 t = find_default_run_target ("attach");
2663 find_run_target (void)
2665 struct target_ops *t;
2667 /* If a target on the current stack can attach, use it. */
2668 for (t = current_target.beneath; t != NULL; t = t->beneath)
2670 if (t->to_create_inferior != NULL)
2674 /* Otherwise, use the default run target. */
2676 t = find_default_run_target ("run");
2681 /* Implement the "info proc" command. */
2684 target_info_proc (const char *args, enum info_proc_what what)
2686 struct target_ops *t;
2688 /* If we're already connected to something that can get us OS
2689 related data, use it. Otherwise, try using the native
2691 if (current_target.to_stratum >= process_stratum)
2692 t = current_target.beneath;
2694 t = find_default_run_target (NULL);
2696 for (; t != NULL; t = t->beneath)
2698 if (t->to_info_proc != NULL)
2700 t->to_info_proc (t, args, what);
2703 fprintf_unfiltered (gdb_stdlog,
2704 "target_info_proc (\"%s\", %d)\n", args, what);
2714 find_default_supports_disable_randomization (struct target_ops *self)
2716 struct target_ops *t;
2718 t = find_default_run_target (NULL);
2719 if (t && t->to_supports_disable_randomization)
2720 return (t->to_supports_disable_randomization) (t);
2725 target_supports_disable_randomization (void)
2727 struct target_ops *t;
2729 for (t = ¤t_target; t != NULL; t = t->beneath)
2730 if (t->to_supports_disable_randomization)
2731 return t->to_supports_disable_randomization (t);
2736 /* See target/target.h. */
2739 target_supports_multi_process (void)
2741 return (*current_target.to_supports_multi_process) (¤t_target);
2746 gdb::unique_xmalloc_ptr<char>
2747 target_get_osdata (const char *type)
2749 struct target_ops *t;
2751 /* If we're already connected to something that can get us OS
2752 related data, use it. Otherwise, try using the native
2754 if (current_target.to_stratum >= process_stratum)
2755 t = current_target.beneath;
2757 t = find_default_run_target ("get OS data");
2762 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2765 static struct address_space *
2766 default_thread_address_space (struct target_ops *self, ptid_t ptid)
2768 struct inferior *inf;
2770 /* Fall-back to the "main" address space of the inferior. */
2771 inf = find_inferior_ptid (ptid);
2773 if (inf == NULL || inf->aspace == NULL)
2774 internal_error (__FILE__, __LINE__,
2775 _("Can't determine the current "
2776 "address space of thread %s\n"),
2777 target_pid_to_str (ptid));
2782 /* Determine the current address space of thread PTID. */
2784 struct address_space *
2785 target_thread_address_space (ptid_t ptid)
2787 struct address_space *aspace;
2789 aspace = current_target.to_thread_address_space (¤t_target, ptid);
2790 gdb_assert (aspace != NULL);
2796 /* Target file operations. */
2798 static struct target_ops *
2799 default_fileio_target (void)
2801 /* If we're already connected to something that can perform
2802 file I/O, use it. Otherwise, try using the native target. */
2803 if (current_target.to_stratum >= process_stratum)
2804 return current_target.beneath;
2806 return find_default_run_target ("file I/O");
2809 /* File handle for target file operations. */
2813 /* The target on which this file is open. */
2814 struct target_ops *t;
2816 /* The file descriptor on the target. */
2820 DEF_VEC_O (fileio_fh_t);
2822 /* Vector of currently open file handles. The value returned by
2823 target_fileio_open and passed as the FD argument to other
2824 target_fileio_* functions is an index into this vector. This
2825 vector's entries are never freed; instead, files are marked as
2826 closed, and the handle becomes available for reuse. */
2827 static VEC (fileio_fh_t) *fileio_fhandles;
2829 /* Macro to check whether a fileio_fh_t represents a closed file. */
2830 #define is_closed_fileio_fh(fd) ((fd) < 0)
2832 /* Index into fileio_fhandles of the lowest handle that might be
2833 closed. This permits handle reuse without searching the whole
2834 list each time a new file is opened. */
2835 static int lowest_closed_fd;
2837 /* Acquire a target fileio file descriptor. */
2840 acquire_fileio_fd (struct target_ops *t, int fd)
2844 gdb_assert (!is_closed_fileio_fh (fd));
2846 /* Search for closed handles to reuse. */
2848 VEC_iterate (fileio_fh_t, fileio_fhandles,
2849 lowest_closed_fd, fh);
2851 if (is_closed_fileio_fh (fh->fd))
2854 /* Push a new handle if no closed handles were found. */
2855 if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles))
2856 fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL);
2858 /* Fill in the handle. */
2862 /* Return its index, and start the next lookup at
2864 return lowest_closed_fd++;
2867 /* Release a target fileio file descriptor. */
2870 release_fileio_fd (int fd, fileio_fh_t *fh)
2873 lowest_closed_fd = std::min (lowest_closed_fd, fd);
2876 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2878 #define fileio_fd_to_fh(fd) \
2879 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2881 /* Helper for target_fileio_open and
2882 target_fileio_open_warn_if_slow. */
2885 target_fileio_open_1 (struct inferior *inf, const char *filename,
2886 int flags, int mode, int warn_if_slow,
2889 struct target_ops *t;
2891 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2893 if (t->to_fileio_open != NULL)
2895 int fd = t->to_fileio_open (t, inf, filename, flags, mode,
2896 warn_if_slow, target_errno);
2901 fd = acquire_fileio_fd (t, fd);
2904 fprintf_unfiltered (gdb_stdlog,
2905 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2907 inf == NULL ? 0 : inf->num,
2908 filename, flags, mode,
2910 fd != -1 ? 0 : *target_errno);
2915 *target_errno = FILEIO_ENOSYS;
2922 target_fileio_open (struct inferior *inf, const char *filename,
2923 int flags, int mode, int *target_errno)
2925 return target_fileio_open_1 (inf, filename, flags, mode, 0,
2932 target_fileio_open_warn_if_slow (struct inferior *inf,
2933 const char *filename,
2934 int flags, int mode, int *target_errno)
2936 return target_fileio_open_1 (inf, filename, flags, mode, 1,
2943 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2944 ULONGEST offset, int *target_errno)
2946 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2949 if (is_closed_fileio_fh (fh->fd))
2950 *target_errno = EBADF;
2952 ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf,
2953 len, offset, target_errno);
2956 fprintf_unfiltered (gdb_stdlog,
2957 "target_fileio_pwrite (%d,...,%d,%s) "
2959 fd, len, pulongest (offset),
2960 ret, ret != -1 ? 0 : *target_errno);
2967 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
2968 ULONGEST offset, int *target_errno)
2970 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2973 if (is_closed_fileio_fh (fh->fd))
2974 *target_errno = EBADF;
2976 ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf,
2977 len, offset, target_errno);
2980 fprintf_unfiltered (gdb_stdlog,
2981 "target_fileio_pread (%d,...,%d,%s) "
2983 fd, len, pulongest (offset),
2984 ret, ret != -1 ? 0 : *target_errno);
2991 target_fileio_fstat (int fd, struct stat *sb, int *target_errno)
2993 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2996 if (is_closed_fileio_fh (fh->fd))
2997 *target_errno = EBADF;
2999 ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno);
3002 fprintf_unfiltered (gdb_stdlog,
3003 "target_fileio_fstat (%d) = %d (%d)\n",
3004 fd, ret, ret != -1 ? 0 : *target_errno);
3011 target_fileio_close (int fd, int *target_errno)
3013 fileio_fh_t *fh = fileio_fd_to_fh (fd);
3016 if (is_closed_fileio_fh (fh->fd))
3017 *target_errno = EBADF;
3020 ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno);
3021 release_fileio_fd (fd, fh);
3025 fprintf_unfiltered (gdb_stdlog,
3026 "target_fileio_close (%d) = %d (%d)\n",
3027 fd, ret, ret != -1 ? 0 : *target_errno);
3034 target_fileio_unlink (struct inferior *inf, const char *filename,
3037 struct target_ops *t;
3039 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3041 if (t->to_fileio_unlink != NULL)
3043 int ret = t->to_fileio_unlink (t, inf, filename,
3047 fprintf_unfiltered (gdb_stdlog,
3048 "target_fileio_unlink (%d,%s)"
3050 inf == NULL ? 0 : inf->num, filename,
3051 ret, ret != -1 ? 0 : *target_errno);
3056 *target_errno = FILEIO_ENOSYS;
3063 target_fileio_readlink (struct inferior *inf, const char *filename,
3066 struct target_ops *t;
3068 for (t = default_fileio_target (); t != NULL; t = t->beneath)
3070 if (t->to_fileio_readlink != NULL)
3072 char *ret = t->to_fileio_readlink (t, inf, filename,
3076 fprintf_unfiltered (gdb_stdlog,
3077 "target_fileio_readlink (%d,%s)"
3079 inf == NULL ? 0 : inf->num,
3080 filename, ret? ret : "(nil)",
3081 ret? 0 : *target_errno);
3086 *target_errno = FILEIO_ENOSYS;
3091 target_fileio_close_cleanup (void *opaque)
3093 int fd = *(int *) opaque;
3096 target_fileio_close (fd, &target_errno);
3099 /* Read target file FILENAME, in the filesystem as seen by INF. If
3100 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3101 remote targets, the remote stub). Store the result in *BUF_P and
3102 return the size of the transferred data. PADDING additional bytes
3103 are available in *BUF_P. This is a helper function for
3104 target_fileio_read_alloc; see the declaration of that function for
3105 more information. */
3108 target_fileio_read_alloc_1 (struct inferior *inf, const char *filename,
3109 gdb_byte **buf_p, int padding)
3111 struct cleanup *close_cleanup;
3112 size_t buf_alloc, buf_pos;
3118 fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700,
3123 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3125 /* Start by reading up to 4K at a time. The target will throttle
3126 this number down if necessary. */
3128 buf = (gdb_byte *) xmalloc (buf_alloc);
3132 n = target_fileio_pread (fd, &buf[buf_pos],
3133 buf_alloc - buf_pos - padding, buf_pos,
3137 /* An error occurred. */
3138 do_cleanups (close_cleanup);
3144 /* Read all there was. */
3145 do_cleanups (close_cleanup);
3155 /* If the buffer is filling up, expand it. */
3156 if (buf_alloc < buf_pos * 2)
3159 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
3169 target_fileio_read_alloc (struct inferior *inf, const char *filename,
3172 return target_fileio_read_alloc_1 (inf, filename, buf_p, 0);
3177 gdb::unique_xmalloc_ptr<char>
3178 target_fileio_read_stralloc (struct inferior *inf, const char *filename)
3182 LONGEST i, transferred;
3184 transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1);
3185 bufstr = (char *) buffer;
3187 if (transferred < 0)
3188 return gdb::unique_xmalloc_ptr<char> (nullptr);
3190 if (transferred == 0)
3191 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
3193 bufstr[transferred] = 0;
3195 /* Check for embedded NUL bytes; but allow trailing NULs. */
3196 for (i = strlen (bufstr); i < transferred; i++)
3199 warning (_("target file %s "
3200 "contained unexpected null characters"),
3205 return gdb::unique_xmalloc_ptr<char> (bufstr);
3210 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3211 CORE_ADDR addr, int len)
3213 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3217 default_watchpoint_addr_within_range (struct target_ops *target,
3219 CORE_ADDR start, int length)
3221 return addr >= start && addr < start + length;
3224 static struct gdbarch *
3225 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3227 inferior *inf = find_inferior_ptid (ptid);
3228 gdb_assert (inf != NULL);
3229 return inf->gdbarch;
3233 return_zero (struct target_ops *ignore)
3239 return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2)
3245 * Find the next target down the stack from the specified target.
3249 find_target_beneath (struct target_ops *t)
3257 find_target_at (enum strata stratum)
3259 struct target_ops *t;
3261 for (t = current_target.beneath; t != NULL; t = t->beneath)
3262 if (t->to_stratum == stratum)
3273 target_announce_detach (int from_tty)
3276 const char *exec_file;
3281 exec_file = get_exec_file (0);
3282 if (exec_file == NULL)
3285 pid = ptid_get_pid (inferior_ptid);
3286 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
3287 target_pid_to_str (pid_to_ptid (pid)));
3288 gdb_flush (gdb_stdout);
3291 /* The inferior process has died. Long live the inferior! */
3294 generic_mourn_inferior (void)
3298 ptid = inferior_ptid;
3299 inferior_ptid = null_ptid;
3301 /* Mark breakpoints uninserted in case something tries to delete a
3302 breakpoint while we delete the inferior's threads (which would
3303 fail, since the inferior is long gone). */
3304 mark_breakpoints_out ();
3306 if (!ptid_equal (ptid, null_ptid))
3308 int pid = ptid_get_pid (ptid);
3309 exit_inferior (pid);
3312 /* Note this wipes step-resume breakpoints, so needs to be done
3313 after exit_inferior, which ends up referencing the step-resume
3314 breakpoints through clear_thread_inferior_resources. */
3315 breakpoint_init_inferior (inf_exited);
3317 registers_changed ();
3319 reopen_exec_file ();
3320 reinit_frame_cache ();
3322 if (deprecated_detach_hook)
3323 deprecated_detach_hook ();
3326 /* Convert a normal process ID to a string. Returns the string in a
3330 normal_pid_to_str (ptid_t ptid)
3332 static char buf[32];
3334 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3339 default_pid_to_str (struct target_ops *ops, ptid_t ptid)
3341 return normal_pid_to_str (ptid);
3344 /* Error-catcher for target_find_memory_regions. */
3346 dummy_find_memory_regions (struct target_ops *self,
3347 find_memory_region_ftype ignore1, void *ignore2)
3349 error (_("Command not implemented for this target."));
3353 /* Error-catcher for target_make_corefile_notes. */
3355 dummy_make_corefile_notes (struct target_ops *self,
3356 bfd *ignore1, int *ignore2)
3358 error (_("Command not implemented for this target."));
3362 /* Set up the handful of non-empty slots needed by the dummy target
3366 init_dummy_target (void)
3368 dummy_target.to_shortname = "None";
3369 dummy_target.to_longname = "None";
3370 dummy_target.to_doc = "";
3371 dummy_target.to_supports_disable_randomization
3372 = find_default_supports_disable_randomization;
3373 dummy_target.to_stratum = dummy_stratum;
3374 dummy_target.to_has_all_memory = return_zero;
3375 dummy_target.to_has_memory = return_zero;
3376 dummy_target.to_has_stack = return_zero;
3377 dummy_target.to_has_registers = return_zero;
3378 dummy_target.to_has_execution = return_zero_has_execution;
3379 dummy_target.to_magic = OPS_MAGIC;
3381 install_dummy_methods (&dummy_target);
3386 target_close (struct target_ops *targ)
3388 gdb_assert (!target_is_pushed (targ));
3390 if (targ->to_xclose != NULL)
3391 targ->to_xclose (targ);
3392 else if (targ->to_close != NULL)
3393 targ->to_close (targ);
3396 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3400 target_thread_alive (ptid_t ptid)
3402 return current_target.to_thread_alive (¤t_target, ptid);
3406 target_update_thread_list (void)
3408 current_target.to_update_thread_list (¤t_target);
3412 target_stop (ptid_t ptid)
3416 warning (_("May not interrupt or stop the target, ignoring attempt"));
3420 (*current_target.to_stop) (¤t_target, ptid);
3428 warning (_("May not interrupt or stop the target, ignoring attempt"));
3432 (*current_target.to_interrupt) (¤t_target);
3438 target_pass_ctrlc (void)
3440 (*current_target.to_pass_ctrlc) (¤t_target);
3446 default_target_pass_ctrlc (struct target_ops *ops)
3448 target_interrupt ();
3451 /* See target/target.h. */
3454 target_stop_and_wait (ptid_t ptid)
3456 struct target_waitstatus status;
3457 int was_non_stop = non_stop;
3462 memset (&status, 0, sizeof (status));
3463 target_wait (ptid, &status, 0);
3465 non_stop = was_non_stop;
3468 /* See target/target.h. */
3471 target_continue_no_signal (ptid_t ptid)
3473 target_resume (ptid, 0, GDB_SIGNAL_0);
3476 /* See target/target.h. */
3479 target_continue (ptid_t ptid, enum gdb_signal signal)
3481 target_resume (ptid, 0, signal);
3484 /* Concatenate ELEM to LIST, a comma separate list, and return the
3485 result. The LIST incoming argument is released. */
3488 str_comma_list_concat_elem (char *list, const char *elem)
3491 return xstrdup (elem);
3493 return reconcat (list, list, ", ", elem, (char *) NULL);
3496 /* Helper for target_options_to_string. If OPT is present in
3497 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3498 Returns the new resulting string. OPT is removed from
3502 do_option (int *target_options, char *ret,
3503 int opt, const char *opt_str)
3505 if ((*target_options & opt) != 0)
3507 ret = str_comma_list_concat_elem (ret, opt_str);
3508 *target_options &= ~opt;
3515 target_options_to_string (int target_options)
3519 #define DO_TARG_OPTION(OPT) \
3520 ret = do_option (&target_options, ret, OPT, #OPT)
3522 DO_TARG_OPTION (TARGET_WNOHANG);
3524 if (target_options != 0)
3525 ret = str_comma_list_concat_elem (ret, "unknown???");
3533 target_fetch_registers (struct regcache *regcache, int regno)
3535 current_target.to_fetch_registers (¤t_target, regcache, regno);
3537 regcache->debug_print_register ("target_fetch_registers", regno);
3541 target_store_registers (struct regcache *regcache, int regno)
3543 if (!may_write_registers)
3544 error (_("Writing to registers is not allowed (regno %d)"), regno);
3546 current_target.to_store_registers (¤t_target, regcache, regno);
3549 regcache->debug_print_register ("target_store_registers", regno);
3554 target_core_of_thread (ptid_t ptid)
3556 return current_target.to_core_of_thread (¤t_target, ptid);
3560 simple_verify_memory (struct target_ops *ops,
3561 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
3563 LONGEST total_xfered = 0;
3565 while (total_xfered < size)
3567 ULONGEST xfered_len;
3568 enum target_xfer_status status;
3570 ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered);
3572 status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
3573 buf, NULL, lma + total_xfered, howmuch,
3575 if (status == TARGET_XFER_OK
3576 && memcmp (data + total_xfered, buf, xfered_len) == 0)
3578 total_xfered += xfered_len;
3587 /* Default implementation of memory verification. */
3590 default_verify_memory (struct target_ops *self,
3591 const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3593 /* Start over from the top of the target stack. */
3594 return simple_verify_memory (current_target.beneath,
3595 data, memaddr, size);
3599 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3601 return current_target.to_verify_memory (¤t_target,
3602 data, memaddr, size);
3605 /* The documentation for this function is in its prototype declaration in
3609 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3610 enum target_hw_bp_type rw)
3612 return current_target.to_insert_mask_watchpoint (¤t_target,
3616 /* The documentation for this function is in its prototype declaration in
3620 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3621 enum target_hw_bp_type rw)
3623 return current_target.to_remove_mask_watchpoint (¤t_target,
3627 /* The documentation for this function is in its prototype declaration
3631 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3633 return current_target.to_masked_watch_num_registers (¤t_target,
3637 /* The documentation for this function is in its prototype declaration
3641 target_ranged_break_num_registers (void)
3643 return current_target.to_ranged_break_num_registers (¤t_target);
3648 struct btrace_target_info *
3649 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
3651 return current_target.to_enable_btrace (¤t_target, ptid, conf);
3657 target_disable_btrace (struct btrace_target_info *btinfo)
3659 current_target.to_disable_btrace (¤t_target, btinfo);
3665 target_teardown_btrace (struct btrace_target_info *btinfo)
3667 current_target.to_teardown_btrace (¤t_target, btinfo);
3673 target_read_btrace (struct btrace_data *btrace,
3674 struct btrace_target_info *btinfo,
3675 enum btrace_read_type type)
3677 return current_target.to_read_btrace (¤t_target, btrace, btinfo, type);
3682 const struct btrace_config *
3683 target_btrace_conf (const struct btrace_target_info *btinfo)
3685 return current_target.to_btrace_conf (¤t_target, btinfo);
3691 target_stop_recording (void)
3693 current_target.to_stop_recording (¤t_target);
3699 target_save_record (const char *filename)
3701 current_target.to_save_record (¤t_target, filename);
3707 target_supports_delete_record (void)
3709 struct target_ops *t;
3711 for (t = current_target.beneath; t != NULL; t = t->beneath)
3712 if (t->to_delete_record != delegate_delete_record
3713 && t->to_delete_record != tdefault_delete_record)
3722 target_delete_record (void)
3724 current_target.to_delete_record (¤t_target);
3730 target_record_method (ptid_t ptid)
3732 return current_target.to_record_method (¤t_target, ptid);
3738 target_record_is_replaying (ptid_t ptid)
3740 return current_target.to_record_is_replaying (¤t_target, ptid);
3746 target_record_will_replay (ptid_t ptid, int dir)
3748 return current_target.to_record_will_replay (¤t_target, ptid, dir);
3754 target_record_stop_replaying (void)
3756 current_target.to_record_stop_replaying (¤t_target);
3762 target_goto_record_begin (void)
3764 current_target.to_goto_record_begin (¤t_target);
3770 target_goto_record_end (void)
3772 current_target.to_goto_record_end (¤t_target);
3778 target_goto_record (ULONGEST insn)
3780 current_target.to_goto_record (¤t_target, insn);
3786 target_insn_history (int size, gdb_disassembly_flags flags)
3788 current_target.to_insn_history (¤t_target, size, flags);
3794 target_insn_history_from (ULONGEST from, int size,
3795 gdb_disassembly_flags flags)
3797 current_target.to_insn_history_from (¤t_target, from, size, flags);
3803 target_insn_history_range (ULONGEST begin, ULONGEST end,
3804 gdb_disassembly_flags flags)
3806 current_target.to_insn_history_range (¤t_target, begin, end, flags);
3812 target_call_history (int size, record_print_flags flags)
3814 current_target.to_call_history (¤t_target, size, flags);
3820 target_call_history_from (ULONGEST begin, int size, record_print_flags flags)
3822 current_target.to_call_history_from (¤t_target, begin, size, flags);
3828 target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags)
3830 current_target.to_call_history_range (¤t_target, begin, end, flags);
3835 const struct frame_unwind *
3836 target_get_unwinder (void)
3838 return current_target.to_get_unwinder (¤t_target);
3843 const struct frame_unwind *
3844 target_get_tailcall_unwinder (void)
3846 return current_target.to_get_tailcall_unwinder (¤t_target);
3852 target_prepare_to_generate_core (void)
3854 current_target.to_prepare_to_generate_core (¤t_target);
3860 target_done_generating_core (void)
3862 current_target.to_done_generating_core (¤t_target);
3866 setup_target_debug (void)
3868 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3870 init_debug_target (¤t_target);
3874 static char targ_desc[] =
3875 "Names of targets and files being debugged.\nShows the entire \
3876 stack of targets currently in use (including the exec-file,\n\
3877 core-file, and process, if any), as well as the symbol file name.";
3880 default_rcmd (struct target_ops *self, const char *command,
3881 struct ui_file *output)
3883 error (_("\"monitor\" command not supported by this target."));
3887 do_monitor_command (const char *cmd, int from_tty)
3889 target_rcmd (cmd, gdb_stdtarg);
3892 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3896 flash_erase_command (const char *cmd, int from_tty)
3898 /* Used to communicate termination of flash operations to the target. */
3899 bool found_flash_region = false;
3900 struct gdbarch *gdbarch = target_gdbarch ();
3902 std::vector<mem_region> mem_regions = target_memory_map ();
3904 /* Iterate over all memory regions. */
3905 for (const mem_region &m : mem_regions)
3907 /* Is this a flash memory region? */
3908 if (m.attrib.mode == MEM_FLASH)
3910 found_flash_region = true;
3911 target_flash_erase (m.lo, m.hi - m.lo);
3913 ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions");
3915 current_uiout->message (_("Erasing flash memory region at address "));
3916 current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo));
3917 current_uiout->message (", size = ");
3918 current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo));
3919 current_uiout->message ("\n");
3923 /* Did we do any flash operations? If so, we need to finalize them. */
3924 if (found_flash_region)
3925 target_flash_done ();
3927 current_uiout->message (_("No flash memory regions found.\n"));
3930 /* Print the name of each layers of our target stack. */
3933 maintenance_print_target_stack (const char *cmd, int from_tty)
3935 struct target_ops *t;
3937 printf_filtered (_("The current target stack is:\n"));
3939 for (t = target_stack; t != NULL; t = t->beneath)
3941 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3948 target_async (int enable)
3950 infrun_async (enable);
3951 current_target.to_async (¤t_target, enable);
3957 target_thread_events (int enable)
3959 current_target.to_thread_events (¤t_target, enable);
3962 /* Controls if targets can report that they can/are async. This is
3963 just for maintainers to use when debugging gdb. */
3964 int target_async_permitted = 1;
3966 /* The set command writes to this variable. If the inferior is
3967 executing, target_async_permitted is *not* updated. */
3968 static int target_async_permitted_1 = 1;
3971 maint_set_target_async_command (const char *args, int from_tty,
3972 struct cmd_list_element *c)
3974 if (have_live_inferiors ())
3976 target_async_permitted_1 = target_async_permitted;
3977 error (_("Cannot change this setting while the inferior is running."));
3980 target_async_permitted = target_async_permitted_1;
3984 maint_show_target_async_command (struct ui_file *file, int from_tty,
3985 struct cmd_list_element *c,
3988 fprintf_filtered (file,
3989 _("Controlling the inferior in "
3990 "asynchronous mode is %s.\n"), value);
3993 /* Return true if the target operates in non-stop mode even with "set
3997 target_always_non_stop_p (void)
3999 return current_target.to_always_non_stop_p (¤t_target);
4005 target_is_non_stop_p (void)
4008 || target_non_stop_enabled == AUTO_BOOLEAN_TRUE
4009 || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO
4010 && target_always_non_stop_p ()));
4013 /* Controls if targets can report that they always run in non-stop
4014 mode. This is just for maintainers to use when debugging gdb. */
4015 enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO;
4017 /* The set command writes to this variable. If the inferior is
4018 executing, target_non_stop_enabled is *not* updated. */
4019 static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO;
4021 /* Implementation of "maint set target-non-stop". */
4024 maint_set_target_non_stop_command (const char *args, int from_tty,
4025 struct cmd_list_element *c)
4027 if (have_live_inferiors ())
4029 target_non_stop_enabled_1 = target_non_stop_enabled;
4030 error (_("Cannot change this setting while the inferior is running."));
4033 target_non_stop_enabled = target_non_stop_enabled_1;
4036 /* Implementation of "maint show target-non-stop". */
4039 maint_show_target_non_stop_command (struct ui_file *file, int from_tty,
4040 struct cmd_list_element *c,
4043 if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO)
4044 fprintf_filtered (file,
4045 _("Whether the target is always in non-stop mode "
4046 "is %s (currently %s).\n"), value,
4047 target_always_non_stop_p () ? "on" : "off");
4049 fprintf_filtered (file,
4050 _("Whether the target is always in non-stop mode "
4051 "is %s.\n"), value);
4054 /* Temporary copies of permission settings. */
4056 static int may_write_registers_1 = 1;
4057 static int may_write_memory_1 = 1;
4058 static int may_insert_breakpoints_1 = 1;
4059 static int may_insert_tracepoints_1 = 1;
4060 static int may_insert_fast_tracepoints_1 = 1;
4061 static int may_stop_1 = 1;
4063 /* Make the user-set values match the real values again. */
4066 update_target_permissions (void)
4068 may_write_registers_1 = may_write_registers;
4069 may_write_memory_1 = may_write_memory;
4070 may_insert_breakpoints_1 = may_insert_breakpoints;
4071 may_insert_tracepoints_1 = may_insert_tracepoints;
4072 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
4073 may_stop_1 = may_stop;
4076 /* The one function handles (most of) the permission flags in the same
4080 set_target_permissions (const char *args, int from_tty,
4081 struct cmd_list_element *c)
4083 if (target_has_execution)
4085 update_target_permissions ();
4086 error (_("Cannot change this setting while the inferior is running."));
4089 /* Make the real values match the user-changed values. */
4090 may_write_registers = may_write_registers_1;
4091 may_insert_breakpoints = may_insert_breakpoints_1;
4092 may_insert_tracepoints = may_insert_tracepoints_1;
4093 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4094 may_stop = may_stop_1;
4095 update_observer_mode ();
4098 /* Set memory write permission independently of observer mode. */
4101 set_write_memory_permission (const char *args, int from_tty,
4102 struct cmd_list_element *c)
4104 /* Make the real values match the user-changed values. */
4105 may_write_memory = may_write_memory_1;
4106 update_observer_mode ();
4110 namespace selftests {
4113 test_target_has_registers (target_ops *self)
4119 test_target_has_stack (target_ops *self)
4125 test_target_has_memory (target_ops *self)
4131 test_target_prepare_to_store (target_ops *self, regcache *regs)
4136 test_target_store_registers (target_ops *self, regcache *regs, int regno)
4140 test_target_ops::test_target_ops ()
4143 to_magic = OPS_MAGIC;
4144 to_stratum = process_stratum;
4145 to_has_memory = test_target_has_memory;
4146 to_has_stack = test_target_has_stack;
4147 to_has_registers = test_target_has_registers;
4148 to_prepare_to_store = test_target_prepare_to_store;
4149 to_store_registers = test_target_store_registers;
4151 complete_target_initialization (this);
4154 } // namespace selftests
4155 #endif /* GDB_SELF_TEST */
4158 initialize_targets (void)
4160 init_dummy_target ();
4161 push_target (&dummy_target);
4163 add_info ("target", info_target_command, targ_desc);
4164 add_info ("files", info_target_command, targ_desc);
4166 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4167 Set target debugging."), _("\
4168 Show target debugging."), _("\
4169 When non-zero, target debugging is enabled. Higher numbers are more\n\
4173 &setdebuglist, &showdebuglist);
4175 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4176 &trust_readonly, _("\
4177 Set mode for reading from readonly sections."), _("\
4178 Show mode for reading from readonly sections."), _("\
4179 When this mode is on, memory reads from readonly sections (such as .text)\n\
4180 will be read from the object file instead of from the target. This will\n\
4181 result in significant performance improvement for remote targets."),
4183 show_trust_readonly,
4184 &setlist, &showlist);
4186 add_com ("monitor", class_obscure, do_monitor_command,
4187 _("Send a command to the remote monitor (remote targets only)."));
4189 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4190 _("Print the name of each layer of the internal target stack."),
4191 &maintenanceprintlist);
4193 add_setshow_boolean_cmd ("target-async", no_class,
4194 &target_async_permitted_1, _("\
4195 Set whether gdb controls the inferior in asynchronous mode."), _("\
4196 Show whether gdb controls the inferior in asynchronous mode."), _("\
4197 Tells gdb whether to control the inferior in asynchronous mode."),
4198 maint_set_target_async_command,
4199 maint_show_target_async_command,
4200 &maintenance_set_cmdlist,
4201 &maintenance_show_cmdlist);
4203 add_setshow_auto_boolean_cmd ("target-non-stop", no_class,
4204 &target_non_stop_enabled_1, _("\
4205 Set whether gdb always controls the inferior in non-stop mode."), _("\
4206 Show whether gdb always controls the inferior in non-stop mode."), _("\
4207 Tells gdb whether to control the inferior in non-stop mode."),
4208 maint_set_target_non_stop_command,
4209 maint_show_target_non_stop_command,
4210 &maintenance_set_cmdlist,
4211 &maintenance_show_cmdlist);
4213 add_setshow_boolean_cmd ("may-write-registers", class_support,
4214 &may_write_registers_1, _("\
4215 Set permission to write into registers."), _("\
4216 Show permission to write into registers."), _("\
4217 When this permission is on, GDB may write into the target's registers.\n\
4218 Otherwise, any sort of write attempt will result in an error."),
4219 set_target_permissions, NULL,
4220 &setlist, &showlist);
4222 add_setshow_boolean_cmd ("may-write-memory", class_support,
4223 &may_write_memory_1, _("\
4224 Set permission to write into target memory."), _("\
4225 Show permission to write into target memory."), _("\
4226 When this permission is on, GDB may write into the target's memory.\n\
4227 Otherwise, any sort of write attempt will result in an error."),
4228 set_write_memory_permission, NULL,
4229 &setlist, &showlist);
4231 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4232 &may_insert_breakpoints_1, _("\
4233 Set permission to insert breakpoints in the target."), _("\
4234 Show permission to insert breakpoints in the target."), _("\
4235 When this permission is on, GDB may insert breakpoints in the program.\n\
4236 Otherwise, any sort of insertion attempt will result in an error."),
4237 set_target_permissions, NULL,
4238 &setlist, &showlist);
4240 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4241 &may_insert_tracepoints_1, _("\
4242 Set permission to insert tracepoints in the target."), _("\
4243 Show permission to insert tracepoints in the target."), _("\
4244 When this permission is on, GDB may insert tracepoints in the program.\n\
4245 Otherwise, any sort of insertion attempt will result in an error."),
4246 set_target_permissions, NULL,
4247 &setlist, &showlist);
4249 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4250 &may_insert_fast_tracepoints_1, _("\
4251 Set permission to insert fast tracepoints in the target."), _("\
4252 Show permission to insert fast tracepoints in the target."), _("\
4253 When this permission is on, GDB may insert fast tracepoints.\n\
4254 Otherwise, any sort of insertion attempt will result in an error."),
4255 set_target_permissions, NULL,
4256 &setlist, &showlist);
4258 add_setshow_boolean_cmd ("may-interrupt", class_support,
4260 Set permission to interrupt or signal the target."), _("\
4261 Show permission to interrupt or signal the target."), _("\
4262 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4263 Otherwise, any attempt to interrupt or stop will be ignored."),
4264 set_target_permissions, NULL,
4265 &setlist, &showlist);
4267 add_com ("flash-erase", no_class, flash_erase_command,
4268 _("Erase all flash memory regions."));
4270 add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
4271 &auto_connect_native_target, _("\
4272 Set whether GDB may automatically connect to the native target."), _("\
4273 Show whether GDB may automatically connect to the native target."), _("\
4274 When on, and GDB is not connected to a target yet, GDB\n\
4275 attempts \"run\" and other commands with the native target."),
4276 NULL, show_auto_connect_native_target,
4277 &setlist, &showlist);