1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2022 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"
29 #include "observable.h"
37 #include "target-descriptions.h"
38 #include "gdbthread.h"
41 #include "inline-frame.h"
42 #include "tracepoint.h"
43 #include "gdb/fileio.h"
44 #include "gdbsupport/agent.h"
46 #include "target-debug.h"
48 #include "event-top.h"
50 #include "gdbsupport/byte-vector.h"
51 #include "gdbsupport/search.h"
53 #include <unordered_map>
54 #include "target-connection.h"
56 #include "cli/cli-decode.h"
58 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
60 static void default_terminal_info (struct target_ops
*, const char *, int);
62 static int default_watchpoint_addr_within_range (struct target_ops
*,
63 CORE_ADDR
, CORE_ADDR
, int);
65 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
68 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
70 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
71 long lwp
, ULONGEST tid
);
73 static void default_mourn_inferior (struct target_ops
*self
);
75 static int default_search_memory (struct target_ops
*ops
,
77 ULONGEST search_space_len
,
78 const gdb_byte
*pattern
,
80 CORE_ADDR
*found_addrp
);
82 static int default_verify_memory (struct target_ops
*self
,
84 CORE_ADDR memaddr
, ULONGEST size
);
86 static void tcomplain (void) ATTRIBUTE_NORETURN
;
88 static struct target_ops
*find_default_run_target (const char *);
90 static int dummy_find_memory_regions (struct target_ops
*self
,
91 find_memory_region_ftype ignore1
,
94 static gdb::unique_xmalloc_ptr
<char> dummy_make_corefile_notes
95 (struct target_ops
*self
, bfd
*ignore1
, int *ignore2
);
97 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
99 static enum exec_direction_kind default_execution_direction
100 (struct target_ops
*self
);
102 /* Mapping between target_info objects (which have address identity)
103 and corresponding open/factory function/callback. Each add_target
104 call adds one entry to this map, and registers a "target
105 TARGET_NAME" command that when invoked calls the factory registered
106 here. The target_info object is associated with the command via
107 the command's context. */
108 static std::unordered_map
<const target_info
*, target_open_ftype
*>
111 /* The singleton debug target. */
113 static struct target_ops
*the_debug_target
;
115 /* Command list for target. */
117 static struct cmd_list_element
*targetlist
= NULL
;
119 /* True if we should trust readonly sections from the
120 executable when reading memory. */
122 static bool trust_readonly
= false;
124 /* Nonzero if we should show true memory content including
125 memory breakpoint inserted by gdb. */
127 static int show_memory_breakpoints
= 0;
129 /* These globals control whether GDB attempts to perform these
130 operations; they are useful for targets that need to prevent
131 inadvertent disruption, such as in non-stop mode. */
133 bool may_write_registers
= true;
135 bool may_write_memory
= true;
137 bool may_insert_breakpoints
= true;
139 bool may_insert_tracepoints
= true;
141 bool may_insert_fast_tracepoints
= true;
143 bool may_stop
= true;
145 /* Non-zero if we want to see trace of target level stuff. */
147 static unsigned int targetdebug
= 0;
150 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
153 current_inferior ()->push_target (the_debug_target
);
155 current_inferior ()->unpush_target (the_debug_target
);
159 show_targetdebug (struct ui_file
*file
, int from_tty
,
160 struct cmd_list_element
*c
, const char *value
)
162 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
168 for (target_ops
*t
= current_inferior ()->top_target ();
171 if (t
->has_memory ())
180 for (target_ops
*t
= current_inferior ()->top_target ();
190 target_has_registers ()
192 for (target_ops
*t
= current_inferior ()->top_target ();
195 if (t
->has_registers ())
202 target_has_execution (inferior
*inf
)
205 inf
= current_inferior ();
207 for (target_ops
*t
= inf
->top_target ();
209 t
= inf
->find_target_beneath (t
))
210 if (t
->has_execution (inf
))
219 return current_inferior ()->top_target ()->shortname ();
225 target_attach_no_wait ()
227 return current_inferior ()->top_target ()->attach_no_wait ();
233 target_post_attach (int pid
)
235 return current_inferior ()->top_target ()->post_attach (pid
);
241 target_prepare_to_store (regcache
*regcache
)
243 return current_inferior ()->top_target ()->prepare_to_store (regcache
);
249 target_supports_enable_disable_tracepoint ()
251 target_ops
*target
= current_inferior ()->top_target ();
253 return target
->supports_enable_disable_tracepoint ();
257 target_supports_string_tracing ()
259 return current_inferior ()->top_target ()->supports_string_tracing ();
265 target_supports_evaluation_of_breakpoint_conditions ()
267 target_ops
*target
= current_inferior ()->top_target ();
269 return target
->supports_evaluation_of_breakpoint_conditions ();
275 target_supports_dumpcore ()
277 return current_inferior ()->top_target ()->supports_dumpcore ();
283 target_dumpcore (const char *filename
)
285 return current_inferior ()->top_target ()->dumpcore (filename
);
291 target_can_run_breakpoint_commands ()
293 return current_inferior ()->top_target ()->can_run_breakpoint_commands ();
301 return current_inferior ()->top_target ()->files_info ();
307 target_insert_fork_catchpoint (int pid
)
309 return current_inferior ()->top_target ()->insert_fork_catchpoint (pid
);
315 target_remove_fork_catchpoint (int pid
)
317 return current_inferior ()->top_target ()->remove_fork_catchpoint (pid
);
323 target_insert_vfork_catchpoint (int pid
)
325 return current_inferior ()->top_target ()->insert_vfork_catchpoint (pid
);
331 target_remove_vfork_catchpoint (int pid
)
333 return current_inferior ()->top_target ()->remove_vfork_catchpoint (pid
);
339 target_insert_exec_catchpoint (int pid
)
341 return current_inferior ()->top_target ()->insert_exec_catchpoint (pid
);
347 target_remove_exec_catchpoint (int pid
)
349 return current_inferior ()->top_target ()->remove_exec_catchpoint (pid
);
355 target_set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
356 gdb::array_view
<const int> syscall_counts
)
358 target_ops
*target
= current_inferior ()->top_target ();
360 return target
->set_syscall_catchpoint (pid
, needed
, any_count
,
367 target_rcmd (const char *command
, struct ui_file
*outbuf
)
369 return current_inferior ()->top_target ()->rcmd (command
, outbuf
);
375 target_can_lock_scheduler ()
377 target_ops
*target
= current_inferior ()->top_target ();
379 return (target
->get_thread_control_capabilities ()& tc_schedlock
) != 0;
385 target_can_async_p ()
387 return target_can_async_p (current_inferior ()->top_target ());
393 target_can_async_p (struct target_ops
*target
)
395 if (!target_async_permitted
)
397 return target
->can_async_p ();
405 bool result
= current_inferior ()->top_target ()->is_async_p ();
406 gdb_assert (target_async_permitted
|| !result
);
411 target_execution_direction ()
413 return current_inferior ()->top_target ()->execution_direction ();
419 target_extra_thread_info (thread_info
*tp
)
421 return current_inferior ()->top_target ()->extra_thread_info (tp
);
427 target_pid_to_exec_file (int pid
)
429 return current_inferior ()->top_target ()->pid_to_exec_file (pid
);
435 target_thread_architecture (ptid_t ptid
)
437 return current_inferior ()->top_target ()->thread_architecture (ptid
);
443 target_find_memory_regions (find_memory_region_ftype func
, void *data
)
445 return current_inferior ()->top_target ()->find_memory_regions (func
, data
);
450 gdb::unique_xmalloc_ptr
<char>
451 target_make_corefile_notes (bfd
*bfd
, int *size_p
)
453 return current_inferior ()->top_target ()->make_corefile_notes (bfd
, size_p
);
457 target_get_bookmark (const char *args
, int from_tty
)
459 return current_inferior ()->top_target ()->get_bookmark (args
, from_tty
);
463 target_goto_bookmark (const gdb_byte
*arg
, int from_tty
)
465 return current_inferior ()->top_target ()->goto_bookmark (arg
, from_tty
);
471 target_stopped_by_watchpoint ()
473 return current_inferior ()->top_target ()->stopped_by_watchpoint ();
479 target_stopped_by_sw_breakpoint ()
481 return current_inferior ()->top_target ()->stopped_by_sw_breakpoint ();
485 target_supports_stopped_by_sw_breakpoint ()
487 target_ops
*target
= current_inferior ()->top_target ();
489 return target
->supports_stopped_by_sw_breakpoint ();
493 target_stopped_by_hw_breakpoint ()
495 return current_inferior ()->top_target ()->stopped_by_hw_breakpoint ();
499 target_supports_stopped_by_hw_breakpoint ()
501 target_ops
*target
= current_inferior ()->top_target ();
503 return target
->supports_stopped_by_hw_breakpoint ();
509 target_have_steppable_watchpoint ()
511 return current_inferior ()->top_target ()->have_steppable_watchpoint ();
517 target_can_use_hardware_watchpoint (bptype type
, int cnt
, int othertype
)
519 target_ops
*target
= current_inferior ()->top_target ();
521 return target
->can_use_hw_breakpoint (type
, cnt
, othertype
);
527 target_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
529 target_ops
*target
= current_inferior ()->top_target ();
531 return target
->region_ok_for_hw_watchpoint (addr
, len
);
536 target_can_do_single_step ()
538 return current_inferior ()->top_target ()->can_do_single_step ();
544 target_insert_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
547 target_ops
*target
= current_inferior ()->top_target ();
549 return target
->insert_watchpoint (addr
, len
, type
, cond
);
555 target_remove_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
558 target_ops
*target
= current_inferior ()->top_target ();
560 return target
->remove_watchpoint (addr
, len
, type
, cond
);
566 target_insert_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
568 target_ops
*target
= current_inferior ()->top_target ();
570 return target
->insert_hw_breakpoint (gdbarch
, bp_tgt
);
576 target_remove_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
578 target_ops
*target
= current_inferior ()->top_target ();
580 return target
->remove_hw_breakpoint (gdbarch
, bp_tgt
);
586 target_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int type
,
589 target_ops
*target
= current_inferior ()->top_target ();
591 return target
->can_accel_watchpoint_condition (addr
, len
, type
, cond
);
597 target_can_execute_reverse ()
599 return current_inferior ()->top_target ()->can_execute_reverse ();
603 target_get_ada_task_ptid (long lwp
, ULONGEST tid
)
605 return current_inferior ()->top_target ()->get_ada_task_ptid (lwp
, tid
);
609 target_filesystem_is_local ()
611 return current_inferior ()->top_target ()->filesystem_is_local ();
617 return current_inferior ()->top_target ()->trace_init ();
621 target_download_tracepoint (bp_location
*location
)
623 return current_inferior ()->top_target ()->download_tracepoint (location
);
627 target_can_download_tracepoint ()
629 return current_inferior ()->top_target ()->can_download_tracepoint ();
633 target_download_trace_state_variable (const trace_state_variable
&tsv
)
635 target_ops
*target
= current_inferior ()->top_target ();
637 return target
->download_trace_state_variable (tsv
);
641 target_enable_tracepoint (bp_location
*loc
)
643 return current_inferior ()->top_target ()->enable_tracepoint (loc
);
647 target_disable_tracepoint (bp_location
*loc
)
649 return current_inferior ()->top_target ()->disable_tracepoint (loc
);
653 target_trace_start ()
655 return current_inferior ()->top_target ()->trace_start ();
659 target_trace_set_readonly_regions ()
661 return current_inferior ()->top_target ()->trace_set_readonly_regions ();
665 target_get_trace_status (trace_status
*ts
)
667 return current_inferior ()->top_target ()->get_trace_status (ts
);
671 target_get_tracepoint_status (breakpoint
*tp
, uploaded_tp
*utp
)
673 return current_inferior ()->top_target ()->get_tracepoint_status (tp
, utp
);
679 return current_inferior ()->top_target ()->trace_stop ();
683 target_trace_find (trace_find_type type
, int num
,
684 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
)
686 target_ops
*target
= current_inferior ()->top_target ();
688 return target
->trace_find (type
, num
, addr1
, addr2
, tpp
);
692 target_get_trace_state_variable_value (int tsv
, LONGEST
*val
)
694 target_ops
*target
= current_inferior ()->top_target ();
696 return target
->get_trace_state_variable_value (tsv
, val
);
700 target_save_trace_data (const char *filename
)
702 return current_inferior ()->top_target ()->save_trace_data (filename
);
706 target_upload_tracepoints (uploaded_tp
**utpp
)
708 return current_inferior ()->top_target ()->upload_tracepoints (utpp
);
712 target_upload_trace_state_variables (uploaded_tsv
**utsvp
)
714 target_ops
*target
= current_inferior ()->top_target ();
716 return target
->upload_trace_state_variables (utsvp
);
720 target_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
722 target_ops
*target
= current_inferior ()->top_target ();
724 return target
->get_raw_trace_data (buf
, offset
, len
);
728 target_get_min_fast_tracepoint_insn_len ()
730 target_ops
*target
= current_inferior ()->top_target ();
732 return target
->get_min_fast_tracepoint_insn_len ();
736 target_set_disconnected_tracing (int val
)
738 return current_inferior ()->top_target ()->set_disconnected_tracing (val
);
742 target_set_circular_trace_buffer (int val
)
744 return current_inferior ()->top_target ()->set_circular_trace_buffer (val
);
748 target_set_trace_buffer_size (LONGEST val
)
750 return current_inferior ()->top_target ()->set_trace_buffer_size (val
);
754 target_set_trace_notes (const char *user
, const char *notes
,
755 const char *stopnotes
)
757 target_ops
*target
= current_inferior ()->top_target ();
759 return target
->set_trace_notes (user
, notes
, stopnotes
);
763 target_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
765 return current_inferior ()->top_target ()->get_tib_address (ptid
, addr
);
769 target_set_permissions ()
771 return current_inferior ()->top_target ()->set_permissions ();
775 target_static_tracepoint_marker_at (CORE_ADDR addr
,
776 static_tracepoint_marker
*marker
)
778 target_ops
*target
= current_inferior ()->top_target ();
780 return target
->static_tracepoint_marker_at (addr
, marker
);
783 std::vector
<static_tracepoint_marker
>
784 target_static_tracepoint_markers_by_strid (const char *marker_id
)
786 target_ops
*target
= current_inferior ()->top_target ();
788 return target
->static_tracepoint_markers_by_strid (marker_id
);
792 target_traceframe_info ()
794 return current_inferior ()->top_target ()->traceframe_info ();
798 target_use_agent (bool use
)
800 return current_inferior ()->top_target ()->use_agent (use
);
804 target_can_use_agent ()
806 return current_inferior ()->top_target ()->can_use_agent ();
810 target_augmented_libraries_svr4_read ()
812 return current_inferior ()->top_target ()->augmented_libraries_svr4_read ();
816 target_supports_memory_tagging ()
818 return current_inferior ()->top_target ()->supports_memory_tagging ();
822 target_fetch_memtags (CORE_ADDR address
, size_t len
, gdb::byte_vector
&tags
,
825 return current_inferior ()->top_target ()->fetch_memtags (address
, len
, tags
, type
);
829 target_store_memtags (CORE_ADDR address
, size_t len
,
830 const gdb::byte_vector
&tags
, int type
)
832 return current_inferior ()->top_target ()->store_memtags (address
, len
, tags
, type
);
836 target_log_command (const char *p
)
838 return current_inferior ()->top_target ()->log_command (p
);
841 /* This is used to implement the various target commands. */
844 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
846 auto *ti
= static_cast<target_info
*> (command
->context ());
847 target_open_ftype
*func
= target_factories
[ti
];
850 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
853 func (args
, from_tty
);
856 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
857 ti
->shortname
, args
, from_tty
);
863 add_target (const target_info
&t
, target_open_ftype
*func
,
864 completer_ftype
*completer
)
866 struct cmd_list_element
*c
;
868 auto &func_slot
= target_factories
[&t
];
869 if (func_slot
!= nullptr)
870 internal_error (__FILE__
, __LINE__
,
871 _("target already added (\"%s\")."), t
.shortname
);
874 if (targetlist
== NULL
)
875 add_basic_prefix_cmd ("target", class_run
, _("\
876 Connect to a target machine or process.\n\
877 The first argument is the type or protocol of the target machine.\n\
878 Remaining arguments are interpreted by the target protocol. For more\n\
879 information on the arguments for a particular protocol, type\n\
880 `help target ' followed by the protocol name."),
881 &targetlist
, 0, &cmdlist
);
882 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
883 c
->set_context ((void *) &t
);
884 c
->func
= open_target
;
885 if (completer
!= NULL
)
886 set_cmd_completer (c
, completer
);
892 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
894 struct cmd_list_element
*c
;
896 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
898 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
899 c
->func
= open_target
;
900 c
->set_context ((void *) &tinfo
);
901 gdb::unique_xmalloc_ptr
<char> alt
902 = xstrprintf ("target %s", tinfo
.shortname
);
903 deprecate_cmd (c
, alt
.release ());
911 current_inferior ()->top_target ()->kill ();
915 target_load (const char *arg
, int from_tty
)
917 target_dcache_invalidate ();
918 current_inferior ()->top_target ()->load (arg
, from_tty
);
923 target_terminal_state
target_terminal::m_terminal_state
924 = target_terminal_state::is_ours
;
926 /* See target/target.h. */
929 target_terminal::init (void)
931 current_inferior ()->top_target ()->terminal_init ();
933 m_terminal_state
= target_terminal_state::is_ours
;
936 /* See target/target.h. */
939 target_terminal::inferior (void)
941 struct ui
*ui
= current_ui
;
943 /* A background resume (``run&'') should leave GDB in control of the
945 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
948 /* Since we always run the inferior in the main console (unless "set
949 inferior-tty" is in effect), when some UI other than the main one
950 calls target_terminal::inferior, then we leave the main UI's
951 terminal settings as is. */
955 /* If GDB is resuming the inferior in the foreground, install
956 inferior's terminal modes. */
958 struct inferior
*inf
= current_inferior ();
960 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
962 current_inferior ()->top_target ()->terminal_inferior ();
963 inf
->terminal_state
= target_terminal_state::is_inferior
;
966 m_terminal_state
= target_terminal_state::is_inferior
;
968 /* If the user hit C-c before, pretend that it was hit right
970 if (check_quit_flag ())
971 target_pass_ctrlc ();
974 /* See target/target.h. */
977 target_terminal::restore_inferior (void)
979 struct ui
*ui
= current_ui
;
981 /* See target_terminal::inferior(). */
982 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
985 /* Restore the terminal settings of inferiors that were in the
986 foreground but are now ours_for_output due to a temporary
987 target_target::ours_for_output() call. */
990 scoped_restore_current_inferior restore_inferior
;
992 for (::inferior
*inf
: all_inferiors ())
994 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
996 set_current_inferior (inf
);
997 current_inferior ()->top_target ()->terminal_inferior ();
998 inf
->terminal_state
= target_terminal_state::is_inferior
;
1003 m_terminal_state
= target_terminal_state::is_inferior
;
1005 /* If the user hit C-c before, pretend that it was hit right
1007 if (check_quit_flag ())
1008 target_pass_ctrlc ();
1011 /* Switch terminal state to DESIRED_STATE, either is_ours, or
1012 is_ours_for_output. */
1015 target_terminal_is_ours_kind (target_terminal_state desired_state
)
1017 scoped_restore_current_inferior restore_inferior
;
1019 /* Must do this in two passes. First, have all inferiors save the
1020 current terminal settings. Then, after all inferiors have add a
1021 chance to safely save the terminal settings, restore GDB's
1022 terminal settings. */
1024 for (inferior
*inf
: all_inferiors ())
1026 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
1028 set_current_inferior (inf
);
1029 current_inferior ()->top_target ()->terminal_save_inferior ();
1033 for (inferior
*inf
: all_inferiors ())
1035 /* Note we don't check is_inferior here like above because we
1036 need to handle 'is_ours_for_output -> is_ours' too. Careful
1037 to never transition from 'is_ours' to 'is_ours_for_output',
1039 if (inf
->terminal_state
!= target_terminal_state::is_ours
1040 && inf
->terminal_state
!= desired_state
)
1042 set_current_inferior (inf
);
1043 if (desired_state
== target_terminal_state::is_ours
)
1044 current_inferior ()->top_target ()->terminal_ours ();
1045 else if (desired_state
== target_terminal_state::is_ours_for_output
)
1046 current_inferior ()->top_target ()->terminal_ours_for_output ();
1048 gdb_assert_not_reached ("unhandled desired state");
1049 inf
->terminal_state
= desired_state
;
1054 /* See target/target.h. */
1057 target_terminal::ours ()
1059 struct ui
*ui
= current_ui
;
1061 /* See target_terminal::inferior. */
1065 if (m_terminal_state
== target_terminal_state::is_ours
)
1068 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
1069 m_terminal_state
= target_terminal_state::is_ours
;
1072 /* See target/target.h. */
1075 target_terminal::ours_for_output ()
1077 struct ui
*ui
= current_ui
;
1079 /* See target_terminal::inferior. */
1083 if (!target_terminal::is_inferior ())
1086 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
1087 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
1090 /* See target/target.h. */
1093 target_terminal::info (const char *arg
, int from_tty
)
1095 current_inferior ()->top_target ()->terminal_info (arg
, from_tty
);
1101 target_supports_terminal_ours (void)
1103 /* The current top target is the target at the top of the target
1104 stack of the current inferior. While normally there's always an
1105 inferior, we must check for nullptr here because we can get here
1106 very early during startup, before the initial inferior is first
1108 inferior
*inf
= current_inferior ();
1112 return inf
->top_target ()->supports_terminal_ours ();
1118 error (_("You can't do that when your target is `%s'"),
1119 current_inferior ()->top_target ()->shortname ());
1125 error (_("You can't do that without a process to debug."));
1129 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
1131 printf_filtered (_("No saved terminal information.\n"));
1134 /* A default implementation for the to_get_ada_task_ptid target method.
1136 This function builds the PTID by using both LWP and TID as part of
1137 the PTID lwp and tid elements. The pid used is the pid of the
1141 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, ULONGEST tid
)
1143 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
1146 static enum exec_direction_kind
1147 default_execution_direction (struct target_ops
*self
)
1149 if (!target_can_execute_reverse ())
1150 return EXEC_FORWARD
;
1151 else if (!target_can_async_p ())
1152 return EXEC_FORWARD
;
1154 gdb_assert_not_reached ("\
1155 to_execution_direction must be implemented for reverse async");
1161 decref_target (target_ops
*t
)
1164 if (t
->refcount () == 0)
1166 if (t
->stratum () == process_stratum
)
1167 connection_list_remove (as_process_stratum_target (t
));
1175 target_stack::push (target_ops
*t
)
1179 strata stratum
= t
->stratum ();
1181 if (stratum
== process_stratum
)
1182 connection_list_add (as_process_stratum_target (t
));
1184 /* If there's already a target at this stratum, remove it. */
1186 if (m_stack
[stratum
] != NULL
)
1187 unpush (m_stack
[stratum
]);
1189 /* Now add the new one. */
1190 m_stack
[stratum
] = t
;
1192 if (m_top
< stratum
)
1199 target_stack::unpush (target_ops
*t
)
1201 gdb_assert (t
!= NULL
);
1203 strata stratum
= t
->stratum ();
1205 if (stratum
== dummy_stratum
)
1206 internal_error (__FILE__
, __LINE__
,
1207 _("Attempt to unpush the dummy target"));
1209 /* Look for the specified target. Note that a target can only occur
1210 once in the target stack. */
1212 if (m_stack
[stratum
] != t
)
1214 /* If T wasn't pushed, quit. Only open targets should be
1219 /* Unchain the target. */
1220 m_stack
[stratum
] = NULL
;
1222 if (m_top
== stratum
)
1223 m_top
= this->find_beneath (t
)->stratum ();
1225 /* Finally close the target, if there are no inferiors
1226 referencing this target still. Note we do this after unchaining,
1227 so any target method calls from within the target_close
1228 implementation don't end up in T anymore. Do leave the target
1229 open if we have are other inferiors referencing this target
1236 /* Unpush TARGET and assert that it worked. */
1239 unpush_target_and_assert (struct target_ops
*target
)
1241 if (!current_inferior ()->unpush_target (target
))
1243 fprintf_unfiltered (gdb_stderr
,
1244 "pop_all_targets couldn't find target %s\n",
1245 target
->shortname ());
1246 internal_error (__FILE__
, __LINE__
,
1247 _("failed internal consistency check"));
1252 pop_all_targets_above (enum strata above_stratum
)
1254 while ((int) (current_inferior ()->top_target ()->stratum ())
1255 > (int) above_stratum
)
1256 unpush_target_and_assert (current_inferior ()->top_target ());
1262 pop_all_targets_at_and_above (enum strata stratum
)
1264 while ((int) (current_inferior ()->top_target ()->stratum ())
1266 unpush_target_and_assert (current_inferior ()->top_target ());
1270 pop_all_targets (void)
1272 pop_all_targets_above (dummy_stratum
);
1276 target_unpusher::operator() (struct target_ops
*ops
) const
1278 current_inferior ()->unpush_target (ops
);
1281 /* Default implementation of to_get_thread_local_address. */
1284 generic_tls_error (void)
1286 throw_error (TLS_GENERIC_ERROR
,
1287 _("Cannot find thread-local variables on this target"));
1290 /* Using the objfile specified in OBJFILE, find the address for the
1291 current thread's thread-local storage with offset OFFSET. */
1293 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1295 volatile CORE_ADDR addr
= 0;
1296 struct target_ops
*target
= current_inferior ()->top_target ();
1297 struct gdbarch
*gdbarch
= target_gdbarch ();
1299 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
1301 ptid_t ptid
= inferior_ptid
;
1307 /* Fetch the load module address for this objfile. */
1308 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
1311 if (gdbarch_get_thread_local_address_p (gdbarch
))
1312 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
1315 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
1317 /* If an error occurred, print TLS related messages here. Otherwise,
1318 throw the error to some higher catcher. */
1319 catch (const gdb_exception
&ex
)
1321 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1325 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1326 error (_("Cannot find thread-local variables "
1327 "in this thread library."));
1329 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1330 if (objfile_is_library
)
1331 error (_("Cannot find shared library `%s' in dynamic"
1332 " linker's load module list"), objfile_name (objfile
));
1334 error (_("Cannot find executable file `%s' in dynamic"
1335 " linker's load module list"), objfile_name (objfile
));
1337 case TLS_NOT_ALLOCATED_YET_ERROR
:
1338 if (objfile_is_library
)
1339 error (_("The inferior has not yet allocated storage for"
1340 " thread-local variables in\n"
1341 "the shared library `%s'\n"
1343 objfile_name (objfile
),
1344 target_pid_to_str (ptid
).c_str ());
1346 error (_("The inferior has not yet allocated storage for"
1347 " thread-local variables in\n"
1348 "the executable `%s'\n"
1350 objfile_name (objfile
),
1351 target_pid_to_str (ptid
).c_str ());
1353 case TLS_GENERIC_ERROR
:
1354 if (objfile_is_library
)
1355 error (_("Cannot find thread-local storage for %s, "
1356 "shared library %s:\n%s"),
1357 target_pid_to_str (ptid
).c_str (),
1358 objfile_name (objfile
), ex
.what ());
1360 error (_("Cannot find thread-local storage for %s, "
1361 "executable file %s:\n%s"),
1362 target_pid_to_str (ptid
).c_str (),
1363 objfile_name (objfile
), ex
.what ());
1372 error (_("Cannot find thread-local variables on this target"));
1378 target_xfer_status_to_string (enum target_xfer_status status
)
1380 #define CASE(X) case X: return #X
1383 CASE(TARGET_XFER_E_IO
);
1384 CASE(TARGET_XFER_UNAVAILABLE
);
1394 gdb::unique_xmalloc_ptr
<char>
1395 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
1397 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
1400 if (bytes_read
== nullptr)
1401 bytes_read
= &ignore
;
1403 /* Note that the endian-ness does not matter here. */
1404 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
1405 &buffer
, bytes_read
);
1409 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1412 const target_section_table
*
1413 target_get_section_table (struct target_ops
*target
)
1415 return target
->get_section_table ();
1418 /* Find a section containing ADDR. */
1420 const struct target_section
*
1421 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1423 const target_section_table
*table
= target_get_section_table (target
);
1428 for (const target_section
&secp
: *table
)
1430 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1438 const target_section_table
*
1439 default_get_section_table ()
1441 return ¤t_program_space
->target_sections ();
1444 /* Helper for the memory xfer routines. Checks the attributes of the
1445 memory region of MEMADDR against the read or write being attempted.
1446 If the access is permitted returns true, otherwise returns false.
1447 REGION_P is an optional output parameter. If not-NULL, it is
1448 filled with a pointer to the memory region of MEMADDR. REG_LEN
1449 returns LEN trimmed to the end of the region. This is how much the
1450 caller can continue requesting, if the access is permitted. A
1451 single xfer request must not straddle memory region boundaries. */
1454 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1455 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1456 struct mem_region
**region_p
)
1458 struct mem_region
*region
;
1460 region
= lookup_mem_region (memaddr
);
1462 if (region_p
!= NULL
)
1465 switch (region
->attrib
.mode
)
1468 if (writebuf
!= NULL
)
1473 if (readbuf
!= NULL
)
1478 /* We only support writing to flash during "load" for now. */
1479 if (writebuf
!= NULL
)
1480 error (_("Writing to flash memory forbidden in this context"));
1487 /* region->hi == 0 means there's no upper bound. */
1488 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1491 *reg_len
= region
->hi
- memaddr
;
1496 /* Read memory from more than one valid target. A core file, for
1497 instance, could have some of memory but delegate other bits to
1498 the target below it. So, we must manually try all targets. */
1500 enum target_xfer_status
1501 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1502 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1503 ULONGEST
*xfered_len
)
1505 enum target_xfer_status res
;
1509 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1510 readbuf
, writebuf
, memaddr
, len
,
1512 if (res
== TARGET_XFER_OK
)
1515 /* Stop if the target reports that the memory is not available. */
1516 if (res
== TARGET_XFER_UNAVAILABLE
)
1519 /* Don't continue past targets which have all the memory.
1520 At one time, this code was necessary to read data from
1521 executables / shared libraries when data for the requested
1522 addresses weren't available in the core file. But now the
1523 core target handles this case itself. */
1524 if (ops
->has_all_memory ())
1527 ops
= ops
->beneath ();
1529 while (ops
!= NULL
);
1531 /* The cache works at the raw memory level. Make sure the cache
1532 gets updated with raw contents no matter what kind of memory
1533 object was originally being written. Note we do write-through
1534 first, so that if it fails, we don't write to the cache contents
1535 that never made it to the target. */
1536 if (writebuf
!= NULL
1537 && inferior_ptid
!= null_ptid
1538 && target_dcache_init_p ()
1539 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1541 DCACHE
*dcache
= target_dcache_get ();
1543 /* Note that writing to an area of memory which wasn't present
1544 in the cache doesn't cause it to be loaded in. */
1545 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1551 /* Perform a partial memory transfer.
1552 For docs see target.h, to_xfer_partial. */
1554 static enum target_xfer_status
1555 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1556 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1557 ULONGEST len
, ULONGEST
*xfered_len
)
1559 enum target_xfer_status res
;
1561 struct mem_region
*region
;
1562 struct inferior
*inf
;
1564 /* For accesses to unmapped overlay sections, read directly from
1565 files. Must do this first, as MEMADDR may need adjustment. */
1566 if (readbuf
!= NULL
&& overlay_debugging
)
1568 struct obj_section
*section
= find_pc_overlay (memaddr
);
1570 if (pc_in_unmapped_range (memaddr
, section
))
1572 const target_section_table
*table
= target_get_section_table (ops
);
1573 const char *section_name
= section
->the_bfd_section
->name
;
1575 memaddr
= overlay_mapped_address (memaddr
, section
);
1577 auto match_cb
= [=] (const struct target_section
*s
)
1579 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1582 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1583 memaddr
, len
, xfered_len
,
1588 /* Try the executable files, if "trust-readonly-sections" is set. */
1589 if (readbuf
!= NULL
&& trust_readonly
)
1591 const struct target_section
*secp
1592 = target_section_by_addr (ops
, memaddr
);
1594 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1596 const target_section_table
*table
= target_get_section_table (ops
);
1597 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1598 memaddr
, len
, xfered_len
,
1603 /* Try GDB's internal data cache. */
1605 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1607 return TARGET_XFER_E_IO
;
1609 if (inferior_ptid
!= null_ptid
)
1610 inf
= current_inferior ();
1616 /* The dcache reads whole cache lines; that doesn't play well
1617 with reading from a trace buffer, because reading outside of
1618 the collected memory range fails. */
1619 && get_traceframe_number () == -1
1620 && (region
->attrib
.cache
1621 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1622 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1624 DCACHE
*dcache
= target_dcache_get_or_init ();
1626 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1627 reg_len
, xfered_len
);
1630 /* If none of those methods found the memory we wanted, fall back
1631 to a target partial transfer. Normally a single call to
1632 to_xfer_partial is enough; if it doesn't recognize an object
1633 it will call the to_xfer_partial of the next target down.
1634 But for memory this won't do. Memory is the only target
1635 object which can be read from more than one valid target.
1636 A core file, for instance, could have some of memory but
1637 delegate other bits to the target below it. So, we must
1638 manually try all targets. */
1640 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1643 /* If we still haven't got anything, return the last error. We
1648 /* Perform a partial memory transfer. For docs see target.h,
1651 static enum target_xfer_status
1652 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1653 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1654 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1656 enum target_xfer_status res
;
1658 /* Zero length requests are ok and require no work. */
1660 return TARGET_XFER_EOF
;
1662 memaddr
= address_significant (target_gdbarch (), memaddr
);
1664 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1665 breakpoint insns, thus hiding out from higher layers whether
1666 there are software breakpoints inserted in the code stream. */
1667 if (readbuf
!= NULL
)
1669 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1672 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1673 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1677 /* A large write request is likely to be partially satisfied
1678 by memory_xfer_partial_1. We will continually malloc
1679 and free a copy of the entire write request for breakpoint
1680 shadow handling even though we only end up writing a small
1681 subset of it. Cap writes to a limit specified by the target
1682 to mitigate this. */
1683 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1685 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1686 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1687 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1694 scoped_restore_tmpl
<int>
1695 make_scoped_restore_show_memory_breakpoints (int show
)
1697 return make_scoped_restore (&show_memory_breakpoints
, show
);
1700 /* For docs see target.h, to_xfer_partial. */
1702 enum target_xfer_status
1703 target_xfer_partial (struct target_ops
*ops
,
1704 enum target_object object
, const char *annex
,
1705 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1706 ULONGEST offset
, ULONGEST len
,
1707 ULONGEST
*xfered_len
)
1709 enum target_xfer_status retval
;
1711 /* Transfer is done when LEN is zero. */
1713 return TARGET_XFER_EOF
;
1715 if (writebuf
&& !may_write_memory
)
1716 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1717 core_addr_to_string_nz (offset
), plongest (len
));
1721 /* If this is a memory transfer, let the memory-specific code
1722 have a look at it instead. Memory transfers are more
1724 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1725 || object
== TARGET_OBJECT_CODE_MEMORY
)
1726 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1727 writebuf
, offset
, len
, xfered_len
);
1728 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1730 /* Skip/avoid accessing the target if the memory region
1731 attributes block the access. Check this here instead of in
1732 raw_memory_xfer_partial as otherwise we'd end up checking
1733 this twice in the case of the memory_xfer_partial path is
1734 taken; once before checking the dcache, and another in the
1735 tail call to raw_memory_xfer_partial. */
1736 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1738 return TARGET_XFER_E_IO
;
1740 /* Request the normal memory object from other layers. */
1741 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1745 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1746 writebuf
, offset
, len
, xfered_len
);
1750 const unsigned char *myaddr
= NULL
;
1752 fprintf_unfiltered (gdb_stdlog
,
1753 "%s:target_xfer_partial "
1754 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1757 (annex
? annex
: "(null)"),
1758 host_address_to_string (readbuf
),
1759 host_address_to_string (writebuf
),
1760 core_addr_to_string_nz (offset
),
1761 pulongest (len
), retval
,
1762 pulongest (*xfered_len
));
1768 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1772 fputs_unfiltered (", bytes =", gdb_stdlog
);
1773 for (i
= 0; i
< *xfered_len
; i
++)
1775 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1777 if (targetdebug
< 2 && i
> 0)
1779 fprintf_unfiltered (gdb_stdlog
, " ...");
1782 fprintf_unfiltered (gdb_stdlog
, "\n");
1785 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1789 fputc_unfiltered ('\n', gdb_stdlog
);
1792 /* Check implementations of to_xfer_partial update *XFERED_LEN
1793 properly. Do assertion after printing debug messages, so that we
1794 can find more clues on assertion failure from debugging messages. */
1795 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1796 gdb_assert (*xfered_len
> 0);
1801 /* Read LEN bytes of target memory at address MEMADDR, placing the
1802 results in GDB's memory at MYADDR. Returns either 0 for success or
1803 -1 if any error occurs.
1805 If an error occurs, no guarantee is made about the contents of the data at
1806 MYADDR. In particular, the caller should not depend upon partial reads
1807 filling the buffer with good data. There is no way for the caller to know
1808 how much good data might have been transfered anyway. Callers that can
1809 deal with partial reads should call target_read (which will retry until
1810 it makes no progress, and then return how much was transferred). */
1813 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1815 if (target_read (current_inferior ()->top_target (),
1816 TARGET_OBJECT_MEMORY
, NULL
,
1817 myaddr
, memaddr
, len
) == len
)
1823 /* See target/target.h. */
1826 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1831 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1834 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1835 gdbarch_byte_order (target_gdbarch ()));
1839 /* Like target_read_memory, but specify explicitly that this is a read
1840 from the target's raw memory. That is, this read bypasses the
1841 dcache, breakpoint shadowing, etc. */
1844 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1846 if (target_read (current_inferior ()->top_target (),
1847 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1848 myaddr
, memaddr
, len
) == len
)
1854 /* Like target_read_memory, but specify explicitly that this is a read from
1855 the target's stack. This may trigger different cache behavior. */
1858 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1860 if (target_read (current_inferior ()->top_target (),
1861 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1862 myaddr
, memaddr
, len
) == len
)
1868 /* Like target_read_memory, but specify explicitly that this is a read from
1869 the target's code. This may trigger different cache behavior. */
1872 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1874 if (target_read (current_inferior ()->top_target (),
1875 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1876 myaddr
, memaddr
, len
) == len
)
1882 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1883 Returns either 0 for success or -1 if any error occurs. If an
1884 error occurs, no guarantee is made about how much data got written.
1885 Callers that can deal with partial writes should call
1889 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1891 if (target_write (current_inferior ()->top_target (),
1892 TARGET_OBJECT_MEMORY
, NULL
,
1893 myaddr
, memaddr
, len
) == len
)
1899 /* Write LEN bytes from MYADDR to target raw memory at address
1900 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1901 If an error occurs, no guarantee is made about how much data got
1902 written. Callers that can deal with partial writes should call
1906 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1908 if (target_write (current_inferior ()->top_target (),
1909 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1910 myaddr
, memaddr
, len
) == len
)
1916 /* Fetch the target's memory map. */
1918 std::vector
<mem_region
>
1919 target_memory_map (void)
1921 target_ops
*target
= current_inferior ()->top_target ();
1922 std::vector
<mem_region
> result
= target
->memory_map ();
1923 if (result
.empty ())
1926 std::sort (result
.begin (), result
.end ());
1928 /* Check that regions do not overlap. Simultaneously assign
1929 a numbering for the "mem" commands to use to refer to
1931 mem_region
*last_one
= NULL
;
1932 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1934 mem_region
*this_one
= &result
[ix
];
1935 this_one
->number
= ix
;
1937 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1939 warning (_("Overlapping regions in memory map: ignoring"));
1940 return std::vector
<mem_region
> ();
1943 last_one
= this_one
;
1950 target_flash_erase (ULONGEST address
, LONGEST length
)
1952 current_inferior ()->top_target ()->flash_erase (address
, length
);
1956 target_flash_done (void)
1958 current_inferior ()->top_target ()->flash_done ();
1962 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1963 struct cmd_list_element
*c
, const char *value
)
1965 fprintf_filtered (file
,
1966 _("Mode for reading from readonly sections is %s.\n"),
1970 /* Target vector read/write partial wrapper functions. */
1972 static enum target_xfer_status
1973 target_read_partial (struct target_ops
*ops
,
1974 enum target_object object
,
1975 const char *annex
, gdb_byte
*buf
,
1976 ULONGEST offset
, ULONGEST len
,
1977 ULONGEST
*xfered_len
)
1979 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1983 static enum target_xfer_status
1984 target_write_partial (struct target_ops
*ops
,
1985 enum target_object object
,
1986 const char *annex
, const gdb_byte
*buf
,
1987 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1989 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1993 /* Wrappers to perform the full transfer. */
1995 /* For docs on target_read see target.h. */
1998 target_read (struct target_ops
*ops
,
1999 enum target_object object
,
2000 const char *annex
, gdb_byte
*buf
,
2001 ULONGEST offset
, LONGEST len
)
2003 LONGEST xfered_total
= 0;
2006 /* If we are reading from a memory object, find the length of an addressable
2007 unit for that architecture. */
2008 if (object
== TARGET_OBJECT_MEMORY
2009 || object
== TARGET_OBJECT_STACK_MEMORY
2010 || object
== TARGET_OBJECT_CODE_MEMORY
2011 || object
== TARGET_OBJECT_RAW_MEMORY
)
2012 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2014 while (xfered_total
< len
)
2016 ULONGEST xfered_partial
;
2017 enum target_xfer_status status
;
2019 status
= target_read_partial (ops
, object
, annex
,
2020 buf
+ xfered_total
* unit_size
,
2021 offset
+ xfered_total
, len
- xfered_total
,
2024 /* Call an observer, notifying them of the xfer progress? */
2025 if (status
== TARGET_XFER_EOF
)
2026 return xfered_total
;
2027 else if (status
== TARGET_XFER_OK
)
2029 xfered_total
+= xfered_partial
;
2033 return TARGET_XFER_E_IO
;
2039 /* Assuming that the entire [begin, end) range of memory cannot be
2040 read, try to read whatever subrange is possible to read.
2042 The function returns, in RESULT, either zero or one memory block.
2043 If there's a readable subrange at the beginning, it is completely
2044 read and returned. Any further readable subrange will not be read.
2045 Otherwise, if there's a readable subrange at the end, it will be
2046 completely read and returned. Any readable subranges before it
2047 (obviously, not starting at the beginning), will be ignored. In
2048 other cases -- either no readable subrange, or readable subrange(s)
2049 that is neither at the beginning, or end, nothing is returned.
2051 The purpose of this function is to handle a read across a boundary
2052 of accessible memory in a case when memory map is not available.
2053 The above restrictions are fine for this case, but will give
2054 incorrect results if the memory is 'patchy'. However, supporting
2055 'patchy' memory would require trying to read every single byte,
2056 and it seems unacceptable solution. Explicit memory map is
2057 recommended for this case -- and target_read_memory_robust will
2058 take care of reading multiple ranges then. */
2061 read_whatever_is_readable (struct target_ops
*ops
,
2062 const ULONGEST begin
, const ULONGEST end
,
2064 std::vector
<memory_read_result
> *result
)
2066 ULONGEST current_begin
= begin
;
2067 ULONGEST current_end
= end
;
2069 ULONGEST xfered_len
;
2071 /* If we previously failed to read 1 byte, nothing can be done here. */
2072 if (end
- begin
<= 1)
2075 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2077 /* Check that either first or the last byte is readable, and give up
2078 if not. This heuristic is meant to permit reading accessible memory
2079 at the boundary of accessible region. */
2080 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2081 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2086 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2087 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2088 &xfered_len
) == TARGET_XFER_OK
)
2096 /* Loop invariant is that the [current_begin, current_end) was previously
2097 found to be not readable as a whole.
2099 Note loop condition -- if the range has 1 byte, we can't divide the range
2100 so there's no point trying further. */
2101 while (current_end
- current_begin
> 1)
2103 ULONGEST first_half_begin
, first_half_end
;
2104 ULONGEST second_half_begin
, second_half_end
;
2106 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2110 first_half_begin
= current_begin
;
2111 first_half_end
= middle
;
2112 second_half_begin
= middle
;
2113 second_half_end
= current_end
;
2117 first_half_begin
= middle
;
2118 first_half_end
= current_end
;
2119 second_half_begin
= current_begin
;
2120 second_half_end
= middle
;
2123 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2124 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2126 first_half_end
- first_half_begin
);
2128 if (xfer
== first_half_end
- first_half_begin
)
2130 /* This half reads up fine. So, the error must be in the
2132 current_begin
= second_half_begin
;
2133 current_end
= second_half_end
;
2137 /* This half is not readable. Because we've tried one byte, we
2138 know some part of this half if actually readable. Go to the next
2139 iteration to divide again and try to read.
2141 We don't handle the other half, because this function only tries
2142 to read a single readable subrange. */
2143 current_begin
= first_half_begin
;
2144 current_end
= first_half_end
;
2150 /* The [begin, current_begin) range has been read. */
2151 result
->emplace_back (begin
, current_end
, std::move (buf
));
2155 /* The [current_end, end) range has been read. */
2156 LONGEST region_len
= end
- current_end
;
2158 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2159 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2160 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2161 region_len
* unit_size
);
2162 result
->emplace_back (current_end
, end
, std::move (data
));
2166 std::vector
<memory_read_result
>
2167 read_memory_robust (struct target_ops
*ops
,
2168 const ULONGEST offset
, const LONGEST len
)
2170 std::vector
<memory_read_result
> result
;
2171 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2173 LONGEST xfered_total
= 0;
2174 while (xfered_total
< len
)
2176 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2179 /* If there is no explicit region, a fake one should be created. */
2180 gdb_assert (region
);
2182 if (region
->hi
== 0)
2183 region_len
= len
- xfered_total
;
2185 region_len
= region
->hi
- offset
;
2187 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2189 /* Cannot read this region. Note that we can end up here only
2190 if the region is explicitly marked inaccessible, or
2191 'inaccessible-by-default' is in effect. */
2192 xfered_total
+= region_len
;
2196 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2197 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2198 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2200 LONGEST xfered_partial
=
2201 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2202 offset
+ xfered_total
, to_read
);
2203 /* Call an observer, notifying them of the xfer progress? */
2204 if (xfered_partial
<= 0)
2206 /* Got an error reading full chunk. See if maybe we can read
2208 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2209 offset
+ xfered_total
+ to_read
,
2210 unit_size
, &result
);
2211 xfered_total
+= to_read
;
2215 result
.emplace_back (offset
+ xfered_total
,
2216 offset
+ xfered_total
+ xfered_partial
,
2217 std::move (buffer
));
2218 xfered_total
+= xfered_partial
;
2228 /* An alternative to target_write with progress callbacks. */
2231 target_write_with_progress (struct target_ops
*ops
,
2232 enum target_object object
,
2233 const char *annex
, const gdb_byte
*buf
,
2234 ULONGEST offset
, LONGEST len
,
2235 void (*progress
) (ULONGEST
, void *), void *baton
)
2237 LONGEST xfered_total
= 0;
2240 /* If we are writing to a memory object, find the length of an addressable
2241 unit for that architecture. */
2242 if (object
== TARGET_OBJECT_MEMORY
2243 || object
== TARGET_OBJECT_STACK_MEMORY
2244 || object
== TARGET_OBJECT_CODE_MEMORY
2245 || object
== TARGET_OBJECT_RAW_MEMORY
)
2246 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2248 /* Give the progress callback a chance to set up. */
2250 (*progress
) (0, baton
);
2252 while (xfered_total
< len
)
2254 ULONGEST xfered_partial
;
2255 enum target_xfer_status status
;
2257 status
= target_write_partial (ops
, object
, annex
,
2258 buf
+ xfered_total
* unit_size
,
2259 offset
+ xfered_total
, len
- xfered_total
,
2262 if (status
!= TARGET_XFER_OK
)
2263 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2266 (*progress
) (xfered_partial
, baton
);
2268 xfered_total
+= xfered_partial
;
2274 /* For docs on target_write see target.h. */
2277 target_write (struct target_ops
*ops
,
2278 enum target_object object
,
2279 const char *annex
, const gdb_byte
*buf
,
2280 ULONGEST offset
, LONGEST len
)
2282 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2286 /* Help for target_read_alloc and target_read_stralloc. See their comments
2289 template <typename T
>
2290 gdb::optional
<gdb::def_vector
<T
>>
2291 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2294 gdb::def_vector
<T
> buf
;
2296 const int chunk
= 4096;
2298 /* This function does not have a length parameter; it reads the
2299 entire OBJECT). Also, it doesn't support objects fetched partly
2300 from one target and partly from another (in a different stratum,
2301 e.g. a core file and an executable). Both reasons make it
2302 unsuitable for reading memory. */
2303 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2305 /* Start by reading up to 4K at a time. The target will throttle
2306 this number down if necessary. */
2309 ULONGEST xfered_len
;
2310 enum target_xfer_status status
;
2312 buf
.resize (buf_pos
+ chunk
);
2314 status
= target_read_partial (ops
, object
, annex
,
2315 (gdb_byte
*) &buf
[buf_pos
],
2319 if (status
== TARGET_XFER_EOF
)
2321 /* Read all there was. */
2322 buf
.resize (buf_pos
);
2325 else if (status
!= TARGET_XFER_OK
)
2327 /* An error occurred. */
2331 buf_pos
+= xfered_len
;
2339 gdb::optional
<gdb::byte_vector
>
2340 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2343 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2348 gdb::optional
<gdb::char_vector
>
2349 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2352 gdb::optional
<gdb::char_vector
> buf
2353 = target_read_alloc_1
<char> (ops
, object
, annex
);
2358 if (buf
->empty () || buf
->back () != '\0')
2359 buf
->push_back ('\0');
2361 /* Check for embedded NUL bytes; but allow trailing NULs. */
2362 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2363 it
!= buf
->end (); it
++)
2366 warning (_("target object %d, annex %s, "
2367 "contained unexpected null characters"),
2368 (int) object
, annex
? annex
: "(none)");
2375 /* Memory transfer methods. */
2378 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2381 /* This method is used to read from an alternate, non-current
2382 target. This read must bypass the overlay support (as symbols
2383 don't match this target), and GDB's internal cache (wrong cache
2384 for this target). */
2385 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2387 memory_error (TARGET_XFER_E_IO
, addr
);
2391 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2392 int len
, enum bfd_endian byte_order
)
2394 gdb_byte buf
[sizeof (ULONGEST
)];
2396 gdb_assert (len
<= sizeof (buf
));
2397 get_target_memory (ops
, addr
, buf
, len
);
2398 return extract_unsigned_integer (buf
, len
, byte_order
);
2404 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2405 struct bp_target_info
*bp_tgt
)
2407 if (!may_insert_breakpoints
)
2409 warning (_("May not insert breakpoints"));
2413 target_ops
*target
= current_inferior ()->top_target ();
2415 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2421 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2422 struct bp_target_info
*bp_tgt
,
2423 enum remove_bp_reason reason
)
2425 /* This is kind of a weird case to handle, but the permission might
2426 have been changed after breakpoints were inserted - in which case
2427 we should just take the user literally and assume that any
2428 breakpoints should be left in place. */
2429 if (!may_insert_breakpoints
)
2431 warning (_("May not remove breakpoints"));
2435 target_ops
*target
= current_inferior ()->top_target ();
2437 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2441 info_target_command (const char *args
, int from_tty
)
2443 int has_all_mem
= 0;
2445 if (current_program_space
->symfile_object_file
!= NULL
)
2447 objfile
*objf
= current_program_space
->symfile_object_file
;
2448 printf_filtered (_("Symbols from \"%s\".\n"),
2449 objfile_name (objf
));
2452 for (target_ops
*t
= current_inferior ()->top_target ();
2456 if (!t
->has_memory ())
2459 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2462 printf_filtered (_("\tWhile running this, "
2463 "GDB does not access memory from...\n"));
2464 printf_filtered ("%s:\n", t
->longname ());
2466 has_all_mem
= t
->has_all_memory ();
2470 /* This function is called before any new inferior is created, e.g.
2471 by running a program, attaching, or connecting to a target.
2472 It cleans up any state from previous invocations which might
2473 change between runs. This is a subset of what target_preopen
2474 resets (things which might change between targets). */
2477 target_pre_inferior (int from_tty
)
2479 /* Clear out solib state. Otherwise the solib state of the previous
2480 inferior might have survived and is entirely wrong for the new
2481 target. This has been observed on GNU/Linux using glibc 2.3. How
2493 Cannot access memory at address 0xdeadbeef
2496 /* In some OSs, the shared library list is the same/global/shared
2497 across inferiors. If code is shared between processes, so are
2498 memory regions and features. */
2499 if (!gdbarch_has_global_solist (target_gdbarch ()))
2501 no_shared_libraries (NULL
, from_tty
);
2503 invalidate_target_mem_regions ();
2505 target_clear_description ();
2508 /* attach_flag may be set if the previous process associated with
2509 the inferior was attached to. */
2510 current_inferior ()->attach_flag
= 0;
2512 current_inferior ()->highest_thread_num
= 0;
2514 agent_capability_invalidate ();
2517 /* This is to be called by the open routine before it does
2521 target_preopen (int from_tty
)
2525 if (current_inferior ()->pid
!= 0)
2528 || !target_has_execution ()
2529 || query (_("A program is being debugged already. Kill it? ")))
2531 /* Core inferiors actually should be detached, not
2533 if (target_has_execution ())
2536 target_detach (current_inferior (), 0);
2539 error (_("Program not killed."));
2542 /* Calling target_kill may remove the target from the stack. But if
2543 it doesn't (which seems like a win for UDI), remove it now. */
2544 /* Leave the exec target, though. The user may be switching from a
2545 live process to a core of the same program. */
2546 pop_all_targets_above (file_stratum
);
2548 target_pre_inferior (from_tty
);
2554 target_detach (inferior
*inf
, int from_tty
)
2556 /* After we have detached, we will clear the register cache for this inferior
2557 by calling registers_changed_ptid. We must save the pid_ptid before
2558 detaching, as the target detach method will clear inf->pid. */
2559 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2561 /* As long as some to_detach implementations rely on the current_inferior
2562 (either directly, or indirectly, like through target_gdbarch or by
2563 reading memory), INF needs to be the current inferior. When that
2564 requirement will become no longer true, then we can remove this
2566 gdb_assert (inf
== current_inferior ());
2568 prepare_for_detach ();
2570 /* Hold a strong reference because detaching may unpush the
2572 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2574 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2576 process_stratum_target
*proc_target
2577 = as_process_stratum_target (proc_target_ref
.get ());
2579 registers_changed_ptid (proc_target
, save_pid_ptid
);
2581 /* We have to ensure we have no frame cache left. Normally,
2582 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2583 inferior_ptid matches save_pid_ptid, but in our case, it does not
2584 call it, as inferior_ptid has been reset. */
2585 reinit_frame_cache ();
2589 target_disconnect (const char *args
, int from_tty
)
2591 /* If we're in breakpoints-always-inserted mode or if breakpoints
2592 are global across processes, we have to remove them before
2594 remove_breakpoints ();
2596 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2599 /* See target/target.h. */
2602 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2603 target_wait_flags options
)
2605 target_ops
*target
= current_inferior ()->top_target ();
2606 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2608 gdb_assert (!proc_target
->commit_resumed_state
);
2610 if (!target_can_async_p (target
))
2611 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2615 gdb::observers::target_pre_wait
.notify (ptid
);
2616 ptid_t event_ptid
= target
->wait (ptid
, status
, options
);
2617 gdb::observers::target_post_wait
.notify (event_ptid
);
2622 gdb::observers::target_post_wait
.notify (null_ptid
);
2630 default_target_wait (struct target_ops
*ops
,
2631 ptid_t ptid
, struct target_waitstatus
*status
,
2632 target_wait_flags options
)
2634 status
->set_ignore ();
2635 return minus_one_ptid
;
2639 target_pid_to_str (ptid_t ptid
)
2641 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2645 target_thread_name (struct thread_info
*info
)
2647 gdb_assert (info
->inf
== current_inferior ());
2649 return current_inferior ()->top_target ()->thread_name (info
);
2652 struct thread_info
*
2653 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2655 struct inferior
*inf
)
2657 target_ops
*target
= current_inferior ()->top_target ();
2659 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2665 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2667 target_ops
*target
= current_inferior ()->top_target ();
2669 return target
->thread_info_to_thread_handle (tip
);
2673 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2675 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2676 gdb_assert (!curr_target
->commit_resumed_state
);
2678 target_dcache_invalidate ();
2680 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2682 registers_changed_ptid (curr_target
, ptid
);
2683 /* We only set the internal executing state here. The user/frontend
2684 running state is set at a higher level. This also clears the
2685 thread's stop_pc as side effect. */
2686 set_executing (curr_target
, ptid
, true);
2687 clear_inline_frame_state (curr_target
, ptid
);
2689 if (target_can_async_p ())
2696 target_commit_resumed ()
2698 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2699 current_inferior ()->top_target ()->commit_resumed ();
2705 target_has_pending_events ()
2707 return current_inferior ()->top_target ()->has_pending_events ();
2711 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2713 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2717 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2719 current_inferior ()->top_target ()->program_signals (program_signals
);
2723 default_follow_fork (struct target_ops
*self
, inferior
*child_inf
,
2724 ptid_t child_ptid
, target_waitkind fork_kind
,
2725 bool follow_child
, bool detach_fork
)
2727 /* Some target returned a fork event, but did not know how to follow it. */
2728 internal_error (__FILE__
, __LINE__
,
2729 _("could not find a target to follow fork"));
2735 target_follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
2736 target_waitkind fork_kind
, bool follow_child
,
2739 target_ops
*target
= current_inferior ()->top_target ();
2741 /* Check consistency between CHILD_INF, CHILD_PTID, FOLLOW_CHILD and
2743 if (child_inf
!= nullptr)
2745 gdb_assert (follow_child
|| !detach_fork
);
2746 gdb_assert (child_inf
->pid
== child_ptid
.pid ());
2749 gdb_assert (!follow_child
&& detach_fork
);
2751 return target
->follow_fork (child_inf
, child_ptid
, fork_kind
, follow_child
,
2758 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2759 const char *execd_pathname
)
2761 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2766 default_mourn_inferior (struct target_ops
*self
)
2768 internal_error (__FILE__
, __LINE__
,
2769 _("could not find a target to follow mourn inferior"));
2773 target_mourn_inferior (ptid_t ptid
)
2775 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2776 current_inferior ()->top_target ()->mourn_inferior ();
2778 /* We no longer need to keep handles on any of the object files.
2779 Make sure to release them to avoid unnecessarily locking any
2780 of them while we're not actually debugging. */
2781 bfd_cache_close_all ();
2784 /* Look for a target which can describe architectural features, starting
2785 from TARGET. If we find one, return its description. */
2787 const struct target_desc
*
2788 target_read_description (struct target_ops
*target
)
2790 return target
->read_description ();
2794 /* Default implementation of memory-searching. */
2797 default_search_memory (struct target_ops
*self
,
2798 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2799 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2800 CORE_ADDR
*found_addrp
)
2802 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2804 return target_read (current_inferior ()->top_target (),
2805 TARGET_OBJECT_MEMORY
, NULL
,
2806 result
, addr
, len
) == len
;
2809 /* Start over from the top of the target stack. */
2810 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2811 pattern
, pattern_len
, found_addrp
);
2814 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2815 sequence of bytes in PATTERN with length PATTERN_LEN.
2817 The result is 1 if found, 0 if not found, and -1 if there was an error
2818 requiring halting of the search (e.g. memory read error).
2819 If the pattern is found the address is recorded in FOUND_ADDRP. */
2822 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2823 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2824 CORE_ADDR
*found_addrp
)
2826 target_ops
*target
= current_inferior ()->top_target ();
2828 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2829 pattern_len
, found_addrp
);
2832 /* Look through the currently pushed targets. If none of them will
2833 be able to restart the currently running process, issue an error
2837 target_require_runnable (void)
2839 for (target_ops
*t
= current_inferior ()->top_target ();
2843 /* If this target knows how to create a new program, then
2844 assume we will still be able to after killing the current
2845 one. Either killing and mourning will not pop T, or else
2846 find_default_run_target will find it again. */
2847 if (t
->can_create_inferior ())
2850 /* Do not worry about targets at certain strata that can not
2851 create inferiors. Assume they will be pushed again if
2852 necessary, and continue to the process_stratum. */
2853 if (t
->stratum () > process_stratum
)
2856 error (_("The \"%s\" target does not support \"run\". "
2857 "Try \"help target\" or \"continue\"."),
2861 /* This function is only called if the target is running. In that
2862 case there should have been a process_stratum target and it
2863 should either know how to create inferiors, or not... */
2864 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2867 /* Whether GDB is allowed to fall back to the default run target for
2868 "run", "attach", etc. when no target is connected yet. */
2869 static bool auto_connect_native_target
= true;
2872 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2873 struct cmd_list_element
*c
, const char *value
)
2875 fprintf_filtered (file
,
2876 _("Whether GDB may automatically connect to the "
2877 "native target is %s.\n"),
2881 /* A pointer to the target that can respond to "run" or "attach".
2882 Native targets are always singletons and instantiated early at GDB
2884 static target_ops
*the_native_target
;
2889 set_native_target (target_ops
*target
)
2891 if (the_native_target
!= NULL
)
2892 internal_error (__FILE__
, __LINE__
,
2893 _("native target already set (\"%s\")."),
2894 the_native_target
->longname ());
2896 the_native_target
= target
;
2902 get_native_target ()
2904 return the_native_target
;
2907 /* Look through the list of possible targets for a target that can
2908 execute a run or attach command without any other data. This is
2909 used to locate the default process stratum.
2911 If DO_MESG is not NULL, the result is always valid (error() is
2912 called for errors); else, return NULL on error. */
2914 static struct target_ops
*
2915 find_default_run_target (const char *do_mesg
)
2917 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2918 return the_native_target
;
2920 if (do_mesg
!= NULL
)
2921 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2928 find_attach_target (void)
2930 /* If a target on the current stack can attach, use it. */
2931 for (target_ops
*t
= current_inferior ()->top_target ();
2935 if (t
->can_attach ())
2939 /* Otherwise, use the default run target for attaching. */
2940 return find_default_run_target ("attach");
2946 find_run_target (void)
2948 /* If a target on the current stack can run, use it. */
2949 for (target_ops
*t
= current_inferior ()->top_target ();
2953 if (t
->can_create_inferior ())
2957 /* Otherwise, use the default run target. */
2958 return find_default_run_target ("run");
2962 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2967 /* Implement the "info proc" command. */
2970 target_info_proc (const char *args
, enum info_proc_what what
)
2972 struct target_ops
*t
;
2974 /* If we're already connected to something that can get us OS
2975 related data, use it. Otherwise, try using the native
2977 t
= find_target_at (process_stratum
);
2979 t
= find_default_run_target (NULL
);
2981 for (; t
!= NULL
; t
= t
->beneath ())
2983 if (t
->info_proc (args
, what
))
2986 fprintf_unfiltered (gdb_stdlog
,
2987 "target_info_proc (\"%s\", %d)\n", args
, what
);
2997 find_default_supports_disable_randomization (struct target_ops
*self
)
2999 struct target_ops
*t
;
3001 t
= find_default_run_target (NULL
);
3003 return t
->supports_disable_randomization ();
3008 target_supports_disable_randomization (void)
3010 return current_inferior ()->top_target ()->supports_disable_randomization ();
3013 /* See target/target.h. */
3016 target_supports_multi_process (void)
3018 return current_inferior ()->top_target ()->supports_multi_process ();
3023 gdb::optional
<gdb::char_vector
>
3024 target_get_osdata (const char *type
)
3026 struct target_ops
*t
;
3028 /* If we're already connected to something that can get us OS
3029 related data, use it. Otherwise, try using the native
3031 t
= find_target_at (process_stratum
);
3033 t
= find_default_run_target ("get OS data");
3038 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3041 /* Determine the current address space of thread PTID. */
3043 struct address_space
*
3044 target_thread_address_space (ptid_t ptid
)
3046 struct address_space
*aspace
;
3048 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3049 gdb_assert (aspace
!= NULL
);
3057 target_ops::beneath () const
3059 return current_inferior ()->find_target_beneath (this);
3063 target_ops::close ()
3068 target_ops::can_attach ()
3074 target_ops::attach (const char *, int)
3076 gdb_assert_not_reached ("target_ops::attach called");
3080 target_ops::can_create_inferior ()
3086 target_ops::create_inferior (const char *, const std::string
&,
3089 gdb_assert_not_reached ("target_ops::create_inferior called");
3093 target_ops::can_run ()
3101 for (target_ops
*t
= current_inferior ()->top_target ();
3112 /* Target file operations. */
3114 static struct target_ops
*
3115 default_fileio_target (void)
3117 struct target_ops
*t
;
3119 /* If we're already connected to something that can perform
3120 file I/O, use it. Otherwise, try using the native target. */
3121 t
= find_target_at (process_stratum
);
3124 return find_default_run_target ("file I/O");
3127 /* File handle for target file operations. */
3131 /* The target on which this file is open. NULL if the target is
3132 meanwhile closed while the handle is open. */
3135 /* The file descriptor on the target. */
3138 /* Check whether this fileio_fh_t represents a closed file. */
3141 return target_fd
< 0;
3145 /* Vector of currently open file handles. The value returned by
3146 target_fileio_open and passed as the FD argument to other
3147 target_fileio_* functions is an index into this vector. This
3148 vector's entries are never freed; instead, files are marked as
3149 closed, and the handle becomes available for reuse. */
3150 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3152 /* Index into fileio_fhandles of the lowest handle that might be
3153 closed. This permits handle reuse without searching the whole
3154 list each time a new file is opened. */
3155 static int lowest_closed_fd
;
3160 fileio_handles_invalidate_target (target_ops
*targ
)
3162 for (fileio_fh_t
&fh
: fileio_fhandles
)
3163 if (fh
.target
== targ
)
3167 /* Acquire a target fileio file descriptor. */
3170 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3172 /* Search for closed handles to reuse. */
3173 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3175 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3177 if (fh
.is_closed ())
3181 /* Push a new handle if no closed handles were found. */
3182 if (lowest_closed_fd
== fileio_fhandles
.size ())
3183 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3185 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3187 /* Should no longer be marked closed. */
3188 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3190 /* Return its index, and start the next lookup at
3192 return lowest_closed_fd
++;
3195 /* Release a target fileio file descriptor. */
3198 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3201 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3204 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3206 static fileio_fh_t
*
3207 fileio_fd_to_fh (int fd
)
3209 return &fileio_fhandles
[fd
];
3213 /* Default implementations of file i/o methods. We don't want these
3214 to delegate automatically, because we need to know which target
3215 supported the method, in order to call it directly from within
3216 pread/pwrite, etc. */
3219 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3220 int flags
, int mode
, int warn_if_slow
,
3223 *target_errno
= FILEIO_ENOSYS
;
3228 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3229 ULONGEST offset
, int *target_errno
)
3231 *target_errno
= FILEIO_ENOSYS
;
3236 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3237 ULONGEST offset
, int *target_errno
)
3239 *target_errno
= FILEIO_ENOSYS
;
3244 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3246 *target_errno
= FILEIO_ENOSYS
;
3251 target_ops::fileio_close (int fd
, int *target_errno
)
3253 *target_errno
= FILEIO_ENOSYS
;
3258 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3261 *target_errno
= FILEIO_ENOSYS
;
3265 gdb::optional
<std::string
>
3266 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3269 *target_errno
= FILEIO_ENOSYS
;
3276 target_fileio_open (struct inferior
*inf
, const char *filename
,
3277 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3279 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3281 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3282 warn_if_slow
, target_errno
);
3284 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3290 fd
= acquire_fileio_fd (t
, fd
);
3293 fprintf_unfiltered (gdb_stdlog
,
3294 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3296 inf
== NULL
? 0 : inf
->num
,
3297 filename
, flags
, mode
,
3299 fd
!= -1 ? 0 : *target_errno
);
3303 *target_errno
= FILEIO_ENOSYS
;
3310 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3311 ULONGEST offset
, int *target_errno
)
3313 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3316 if (fh
->is_closed ())
3317 *target_errno
= EBADF
;
3318 else if (fh
->target
== NULL
)
3319 *target_errno
= EIO
;
3321 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3322 len
, offset
, target_errno
);
3325 fprintf_unfiltered (gdb_stdlog
,
3326 "target_fileio_pwrite (%d,...,%d,%s) "
3328 fd
, len
, pulongest (offset
),
3329 ret
, ret
!= -1 ? 0 : *target_errno
);
3336 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3337 ULONGEST offset
, int *target_errno
)
3339 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3342 if (fh
->is_closed ())
3343 *target_errno
= EBADF
;
3344 else if (fh
->target
== NULL
)
3345 *target_errno
= EIO
;
3347 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3348 len
, offset
, target_errno
);
3351 fprintf_unfiltered (gdb_stdlog
,
3352 "target_fileio_pread (%d,...,%d,%s) "
3354 fd
, len
, pulongest (offset
),
3355 ret
, ret
!= -1 ? 0 : *target_errno
);
3362 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3364 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3367 if (fh
->is_closed ())
3368 *target_errno
= EBADF
;
3369 else if (fh
->target
== NULL
)
3370 *target_errno
= EIO
;
3372 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3375 fprintf_unfiltered (gdb_stdlog
,
3376 "target_fileio_fstat (%d) = %d (%d)\n",
3377 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3384 target_fileio_close (int fd
, int *target_errno
)
3386 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3389 if (fh
->is_closed ())
3390 *target_errno
= EBADF
;
3393 if (fh
->target
!= NULL
)
3394 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3398 release_fileio_fd (fd
, fh
);
3402 fprintf_unfiltered (gdb_stdlog
,
3403 "target_fileio_close (%d) = %d (%d)\n",
3404 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3411 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3414 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3416 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3418 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3422 fprintf_unfiltered (gdb_stdlog
,
3423 "target_fileio_unlink (%d,%s)"
3425 inf
== NULL
? 0 : inf
->num
, filename
,
3426 ret
, ret
!= -1 ? 0 : *target_errno
);
3430 *target_errno
= FILEIO_ENOSYS
;
3436 gdb::optional
<std::string
>
3437 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3440 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3442 gdb::optional
<std::string
> ret
3443 = t
->fileio_readlink (inf
, filename
, target_errno
);
3445 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3449 fprintf_unfiltered (gdb_stdlog
,
3450 "target_fileio_readlink (%d,%s)"
3452 inf
== NULL
? 0 : inf
->num
,
3453 filename
, ret
? ret
->c_str () : "(nil)",
3454 ret
? 0 : *target_errno
);
3458 *target_errno
= FILEIO_ENOSYS
;
3462 /* Like scoped_fd, but specific to target fileio. */
3464 class scoped_target_fd
3467 explicit scoped_target_fd (int fd
) noexcept
3472 ~scoped_target_fd ()
3478 target_fileio_close (m_fd
, &target_errno
);
3482 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3484 int get () const noexcept
3493 /* Read target file FILENAME, in the filesystem as seen by INF. If
3494 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3495 remote targets, the remote stub). Store the result in *BUF_P and
3496 return the size of the transferred data. PADDING additional bytes
3497 are available in *BUF_P. This is a helper function for
3498 target_fileio_read_alloc; see the declaration of that function for
3499 more information. */
3502 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3503 gdb_byte
**buf_p
, int padding
)
3505 size_t buf_alloc
, buf_pos
;
3510 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3511 0700, false, &target_errno
));
3512 if (fd
.get () == -1)
3515 /* Start by reading up to 4K at a time. The target will throttle
3516 this number down if necessary. */
3518 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3522 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3523 buf_alloc
- buf_pos
- padding
, buf_pos
,
3527 /* An error occurred. */
3533 /* Read all there was. */
3543 /* If the buffer is filling up, expand it. */
3544 if (buf_alloc
< buf_pos
* 2)
3547 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3557 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3560 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3565 gdb::unique_xmalloc_ptr
<char>
3566 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3570 LONGEST i
, transferred
;
3572 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3573 bufstr
= (char *) buffer
;
3575 if (transferred
< 0)
3576 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3578 if (transferred
== 0)
3579 return make_unique_xstrdup ("");
3581 bufstr
[transferred
] = 0;
3583 /* Check for embedded NUL bytes; but allow trailing NULs. */
3584 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3587 warning (_("target file %s "
3588 "contained unexpected null characters"),
3593 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3598 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3599 CORE_ADDR addr
, int len
)
3601 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3605 default_watchpoint_addr_within_range (struct target_ops
*target
,
3607 CORE_ADDR start
, int length
)
3609 return addr
>= start
&& addr
< start
+ length
;
3615 target_stack::find_beneath (const target_ops
*t
) const
3617 /* Look for a non-empty slot at stratum levels beneath T's. */
3618 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3619 if (m_stack
[stratum
] != NULL
)
3620 return m_stack
[stratum
];
3628 find_target_at (enum strata stratum
)
3630 return current_inferior ()->target_at (stratum
);
3638 target_announce_detach (int from_tty
)
3641 const char *exec_file
;
3646 pid
= inferior_ptid
.pid ();
3647 exec_file
= get_exec_file (0);
3648 if (exec_file
== nullptr)
3649 printf_unfiltered ("Detaching from pid %s\n",
3650 target_pid_to_str (ptid_t (pid
)).c_str ());
3652 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3653 target_pid_to_str (ptid_t (pid
)).c_str ());
3659 target_announce_attach (int from_tty
, int pid
)
3664 const char *exec_file
= get_exec_file (0);
3666 if (exec_file
!= nullptr)
3667 printf_unfiltered ("Attaching to program: %s, %s\n", exec_file
,
3668 target_pid_to_str (ptid_t (pid
)).c_str ());
3670 printf_unfiltered ("Attaching to %s\n",
3671 target_pid_to_str (ptid_t (pid
)).c_str ());
3674 /* The inferior process has died. Long live the inferior! */
3677 generic_mourn_inferior (void)
3679 inferior
*inf
= current_inferior ();
3681 switch_to_no_thread ();
3683 /* Mark breakpoints uninserted in case something tries to delete a
3684 breakpoint while we delete the inferior's threads (which would
3685 fail, since the inferior is long gone). */
3686 mark_breakpoints_out ();
3689 exit_inferior (inf
);
3691 /* Note this wipes step-resume breakpoints, so needs to be done
3692 after exit_inferior, which ends up referencing the step-resume
3693 breakpoints through clear_thread_inferior_resources. */
3694 breakpoint_init_inferior (inf_exited
);
3696 registers_changed ();
3698 reopen_exec_file ();
3699 reinit_frame_cache ();
3701 if (deprecated_detach_hook
)
3702 deprecated_detach_hook ();
3705 /* Convert a normal process ID to a string. Returns the string in a
3709 normal_pid_to_str (ptid_t ptid
)
3711 return string_printf ("process %d", ptid
.pid ());
3715 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3717 return normal_pid_to_str (ptid
);
3720 /* Error-catcher for target_find_memory_regions. */
3722 dummy_find_memory_regions (struct target_ops
*self
,
3723 find_memory_region_ftype ignore1
, void *ignore2
)
3725 error (_("Command not implemented for this target."));
3729 /* Error-catcher for target_make_corefile_notes. */
3730 static gdb::unique_xmalloc_ptr
<char>
3731 dummy_make_corefile_notes (struct target_ops
*self
,
3732 bfd
*ignore1
, int *ignore2
)
3734 error (_("Command not implemented for this target."));
3738 #include "target-delegates.c"
3740 /* The initial current target, so that there is always a semi-valid
3743 static dummy_target the_dummy_target
;
3750 return &the_dummy_target
;
3753 static const target_info dummy_target_info
= {
3760 dummy_target::stratum () const
3762 return dummy_stratum
;
3766 debug_target::stratum () const
3768 return debug_stratum
;
3772 dummy_target::info () const
3774 return dummy_target_info
;
3778 debug_target::info () const
3780 return beneath ()->info ();
3786 target_close (struct target_ops
*targ
)
3788 for (inferior
*inf
: all_inferiors ())
3789 gdb_assert (!inf
->target_is_pushed (targ
));
3791 fileio_handles_invalidate_target (targ
);
3796 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3800 target_thread_alive (ptid_t ptid
)
3802 return current_inferior ()->top_target ()->thread_alive (ptid
);
3806 target_update_thread_list (void)
3808 current_inferior ()->top_target ()->update_thread_list ();
3812 target_stop (ptid_t ptid
)
3814 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3816 gdb_assert (!proc_target
->commit_resumed_state
);
3820 warning (_("May not interrupt or stop the target, ignoring attempt"));
3824 current_inferior ()->top_target ()->stop (ptid
);
3832 warning (_("May not interrupt or stop the target, ignoring attempt"));
3836 current_inferior ()->top_target ()->interrupt ();
3842 target_pass_ctrlc (void)
3844 /* Pass the Ctrl-C to the first target that has a thread
3846 for (inferior
*inf
: all_inferiors ())
3848 target_ops
*proc_target
= inf
->process_target ();
3849 if (proc_target
== NULL
)
3852 for (thread_info
*thr
: inf
->non_exited_threads ())
3854 /* A thread can be THREAD_STOPPED and executing, while
3855 running an infcall. */
3856 if (thr
->state
== THREAD_RUNNING
|| thr
->executing ())
3858 /* We can get here quite deep in target layers. Avoid
3859 switching thread context or anything that would
3860 communicate with the target (e.g., to fetch
3861 registers), or flushing e.g., the frame cache. We
3862 just switch inferior in order to be able to call
3863 through the target_stack. */
3864 scoped_restore_current_inferior restore_inferior
;
3865 set_current_inferior (inf
);
3866 current_inferior ()->top_target ()->pass_ctrlc ();
3876 default_target_pass_ctrlc (struct target_ops
*ops
)
3878 target_interrupt ();
3881 /* See target/target.h. */
3884 target_stop_and_wait (ptid_t ptid
)
3886 struct target_waitstatus status
;
3887 bool was_non_stop
= non_stop
;
3892 target_wait (ptid
, &status
, 0);
3894 non_stop
= was_non_stop
;
3897 /* See target/target.h. */
3900 target_continue_no_signal (ptid_t ptid
)
3902 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3905 /* See target/target.h. */
3908 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3910 target_resume (ptid
, 0, signal
);
3913 /* Concatenate ELEM to LIST, a comma-separated list. */
3916 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3918 if (!list
->empty ())
3919 list
->append (", ");
3921 list
->append (elem
);
3924 /* Helper for target_options_to_string. If OPT is present in
3925 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3926 OPT is removed from TARGET_OPTIONS. */
3929 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3930 target_wait_flag opt
, const char *opt_str
)
3932 if ((*target_options
& opt
) != 0)
3934 str_comma_list_concat_elem (ret
, opt_str
);
3935 *target_options
&= ~opt
;
3942 target_options_to_string (target_wait_flags target_options
)
3946 #define DO_TARG_OPTION(OPT) \
3947 do_option (&target_options, &ret, OPT, #OPT)
3949 DO_TARG_OPTION (TARGET_WNOHANG
);
3951 if (target_options
!= 0)
3952 str_comma_list_concat_elem (&ret
, "unknown???");
3958 target_fetch_registers (struct regcache
*regcache
, int regno
)
3960 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3962 regcache
->debug_print_register ("target_fetch_registers", regno
);
3966 target_store_registers (struct regcache
*regcache
, int regno
)
3968 if (!may_write_registers
)
3969 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3971 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3974 regcache
->debug_print_register ("target_store_registers", regno
);
3979 target_core_of_thread (ptid_t ptid
)
3981 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3985 simple_verify_memory (struct target_ops
*ops
,
3986 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3988 LONGEST total_xfered
= 0;
3990 while (total_xfered
< size
)
3992 ULONGEST xfered_len
;
3993 enum target_xfer_status status
;
3995 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3997 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3998 buf
, NULL
, lma
+ total_xfered
, howmuch
,
4000 if (status
== TARGET_XFER_OK
4001 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
4003 total_xfered
+= xfered_len
;
4012 /* Default implementation of memory verification. */
4015 default_verify_memory (struct target_ops
*self
,
4016 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4018 /* Start over from the top of the target stack. */
4019 return simple_verify_memory (current_inferior ()->top_target (),
4020 data
, memaddr
, size
);
4024 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4026 target_ops
*target
= current_inferior ()->top_target ();
4028 return target
->verify_memory (data
, memaddr
, size
);
4031 /* The documentation for this function is in its prototype declaration in
4035 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4036 enum target_hw_bp_type rw
)
4038 target_ops
*target
= current_inferior ()->top_target ();
4040 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
4043 /* The documentation for this function is in its prototype declaration in
4047 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4048 enum target_hw_bp_type rw
)
4050 target_ops
*target
= current_inferior ()->top_target ();
4052 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4055 /* The documentation for this function is in its prototype declaration
4059 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4061 target_ops
*target
= current_inferior ()->top_target ();
4063 return target
->masked_watch_num_registers (addr
, mask
);
4066 /* The documentation for this function is in its prototype declaration
4070 target_ranged_break_num_registers (void)
4072 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4077 struct btrace_target_info
*
4078 target_enable_btrace (thread_info
*tp
, const struct btrace_config
*conf
)
4080 return current_inferior ()->top_target ()->enable_btrace (tp
, conf
);
4086 target_disable_btrace (struct btrace_target_info
*btinfo
)
4088 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4094 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4096 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4102 target_read_btrace (struct btrace_data
*btrace
,
4103 struct btrace_target_info
*btinfo
,
4104 enum btrace_read_type type
)
4106 target_ops
*target
= current_inferior ()->top_target ();
4108 return target
->read_btrace (btrace
, btinfo
, type
);
4113 const struct btrace_config
*
4114 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4116 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4122 target_stop_recording (void)
4124 current_inferior ()->top_target ()->stop_recording ();
4130 target_save_record (const char *filename
)
4132 current_inferior ()->top_target ()->save_record (filename
);
4138 target_supports_delete_record ()
4140 return current_inferior ()->top_target ()->supports_delete_record ();
4146 target_delete_record (void)
4148 current_inferior ()->top_target ()->delete_record ();
4154 target_record_method (ptid_t ptid
)
4156 return current_inferior ()->top_target ()->record_method (ptid
);
4162 target_record_is_replaying (ptid_t ptid
)
4164 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4170 target_record_will_replay (ptid_t ptid
, int dir
)
4172 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4178 target_record_stop_replaying (void)
4180 current_inferior ()->top_target ()->record_stop_replaying ();
4186 target_goto_record_begin (void)
4188 current_inferior ()->top_target ()->goto_record_begin ();
4194 target_goto_record_end (void)
4196 current_inferior ()->top_target ()->goto_record_end ();
4202 target_goto_record (ULONGEST insn
)
4204 current_inferior ()->top_target ()->goto_record (insn
);
4210 target_insn_history (int size
, gdb_disassembly_flags flags
)
4212 current_inferior ()->top_target ()->insn_history (size
, flags
);
4218 target_insn_history_from (ULONGEST from
, int size
,
4219 gdb_disassembly_flags flags
)
4221 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4227 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4228 gdb_disassembly_flags flags
)
4230 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4236 target_call_history (int size
, record_print_flags flags
)
4238 current_inferior ()->top_target ()->call_history (size
, flags
);
4244 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4246 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4252 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4254 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4259 const struct frame_unwind
*
4260 target_get_unwinder (void)
4262 return current_inferior ()->top_target ()->get_unwinder ();
4267 const struct frame_unwind
*
4268 target_get_tailcall_unwinder (void)
4270 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4276 target_prepare_to_generate_core (void)
4278 current_inferior ()->top_target ()->prepare_to_generate_core ();
4284 target_done_generating_core (void)
4286 current_inferior ()->top_target ()->done_generating_core ();
4291 static char targ_desc
[] =
4292 "Names of targets and files being debugged.\nShows the entire \
4293 stack of targets currently in use (including the exec-file,\n\
4294 core-file, and process, if any), as well as the symbol file name.";
4297 default_rcmd (struct target_ops
*self
, const char *command
,
4298 struct ui_file
*output
)
4300 error (_("\"monitor\" command not supported by this target."));
4304 do_monitor_command (const char *cmd
, int from_tty
)
4306 target_rcmd (cmd
, gdb_stdtarg
);
4309 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4313 flash_erase_command (const char *cmd
, int from_tty
)
4315 /* Used to communicate termination of flash operations to the target. */
4316 bool found_flash_region
= false;
4317 struct gdbarch
*gdbarch
= target_gdbarch ();
4319 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4321 /* Iterate over all memory regions. */
4322 for (const mem_region
&m
: mem_regions
)
4324 /* Is this a flash memory region? */
4325 if (m
.attrib
.mode
== MEM_FLASH
)
4327 found_flash_region
= true;
4328 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4330 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4332 current_uiout
->message (_("Erasing flash memory region at address "));
4333 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4334 current_uiout
->message (", size = ");
4335 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4336 current_uiout
->message ("\n");
4340 /* Did we do any flash operations? If so, we need to finalize them. */
4341 if (found_flash_region
)
4342 target_flash_done ();
4344 current_uiout
->message (_("No flash memory regions found.\n"));
4347 /* Print the name of each layers of our target stack. */
4350 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4352 printf_filtered (_("The current target stack is:\n"));
4354 for (target_ops
*t
= current_inferior ()->top_target ();
4358 if (t
->stratum () == debug_stratum
)
4360 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
4367 target_async (int enable
)
4369 /* If we are trying to enable async mode then it must be the case that
4370 async mode is possible for this target. */
4371 gdb_assert (!enable
|| target_can_async_p ());
4372 infrun_async (enable
);
4373 current_inferior ()->top_target ()->async (enable
);
4379 target_thread_events (int enable
)
4381 current_inferior ()->top_target ()->thread_events (enable
);
4384 /* Controls if targets can report that they can/are async. This is
4385 just for maintainers to use when debugging gdb. */
4386 bool target_async_permitted
= true;
4389 set_maint_target_async (bool permitted
)
4391 if (have_live_inferiors ())
4392 error (_("Cannot change this setting while the inferior is running."));
4394 target_async_permitted
= permitted
;
4398 get_maint_target_async ()
4400 return target_async_permitted
;
4404 show_maint_target_async (ui_file
*file
, int from_tty
,
4405 cmd_list_element
*c
, const char *value
)
4407 fprintf_filtered (file
,
4408 _("Controlling the inferior in "
4409 "asynchronous mode is %s.\n"), value
);
4412 /* Return true if the target operates in non-stop mode even with "set
4416 target_always_non_stop_p (void)
4418 return current_inferior ()->top_target ()->always_non_stop_p ();
4424 target_is_non_stop_p ()
4427 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4428 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4429 && target_always_non_stop_p ()))
4430 && target_can_async_p ());
4436 exists_non_stop_target ()
4438 if (target_is_non_stop_p ())
4441 scoped_restore_current_thread restore_thread
;
4443 for (inferior
*inf
: all_inferiors ())
4445 switch_to_inferior_no_thread (inf
);
4446 if (target_is_non_stop_p ())
4453 /* Controls if targets can report that they always run in non-stop
4454 mode. This is just for maintainers to use when debugging gdb. */
4455 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4457 /* Set callback for maint target-non-stop setting. */
4460 set_maint_target_non_stop (auto_boolean enabled
)
4462 if (have_live_inferiors ())
4463 error (_("Cannot change this setting while the inferior is running."));
4465 target_non_stop_enabled
= enabled
;
4468 /* Get callback for maint target-non-stop setting. */
4471 get_maint_target_non_stop ()
4473 return target_non_stop_enabled
;
4477 show_maint_target_non_stop (ui_file
*file
, int from_tty
,
4478 cmd_list_element
*c
, const char *value
)
4480 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4481 fprintf_filtered (file
,
4482 _("Whether the target is always in non-stop mode "
4483 "is %s (currently %s).\n"), value
,
4484 target_always_non_stop_p () ? "on" : "off");
4486 fprintf_filtered (file
,
4487 _("Whether the target is always in non-stop mode "
4488 "is %s.\n"), value
);
4491 /* Temporary copies of permission settings. */
4493 static bool may_write_registers_1
= true;
4494 static bool may_write_memory_1
= true;
4495 static bool may_insert_breakpoints_1
= true;
4496 static bool may_insert_tracepoints_1
= true;
4497 static bool may_insert_fast_tracepoints_1
= true;
4498 static bool may_stop_1
= true;
4500 /* Make the user-set values match the real values again. */
4503 update_target_permissions (void)
4505 may_write_registers_1
= may_write_registers
;
4506 may_write_memory_1
= may_write_memory
;
4507 may_insert_breakpoints_1
= may_insert_breakpoints
;
4508 may_insert_tracepoints_1
= may_insert_tracepoints
;
4509 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4510 may_stop_1
= may_stop
;
4513 /* The one function handles (most of) the permission flags in the same
4517 set_target_permissions (const char *args
, int from_tty
,
4518 struct cmd_list_element
*c
)
4520 if (target_has_execution ())
4522 update_target_permissions ();
4523 error (_("Cannot change this setting while the inferior is running."));
4526 /* Make the real values match the user-changed values. */
4527 may_write_registers
= may_write_registers_1
;
4528 may_insert_breakpoints
= may_insert_breakpoints_1
;
4529 may_insert_tracepoints
= may_insert_tracepoints_1
;
4530 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4531 may_stop
= may_stop_1
;
4532 update_observer_mode ();
4535 /* Set memory write permission independently of observer mode. */
4538 set_write_memory_permission (const char *args
, int from_tty
,
4539 struct cmd_list_element
*c
)
4541 /* Make the real values match the user-changed values. */
4542 may_write_memory
= may_write_memory_1
;
4543 update_observer_mode ();
4546 void _initialize_target ();
4549 _initialize_target ()
4551 the_debug_target
= new debug_target ();
4553 add_info ("target", info_target_command
, targ_desc
);
4554 add_info ("files", info_target_command
, targ_desc
);
4556 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4557 Set target debugging."), _("\
4558 Show target debugging."), _("\
4559 When non-zero, target debugging is enabled. Higher numbers are more\n\
4563 &setdebuglist
, &showdebuglist
);
4565 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4566 &trust_readonly
, _("\
4567 Set mode for reading from readonly sections."), _("\
4568 Show mode for reading from readonly sections."), _("\
4569 When this mode is on, memory reads from readonly sections (such as .text)\n\
4570 will be read from the object file instead of from the target. This will\n\
4571 result in significant performance improvement for remote targets."),
4573 show_trust_readonly
,
4574 &setlist
, &showlist
);
4576 add_com ("monitor", class_obscure
, do_monitor_command
,
4577 _("Send a command to the remote monitor (remote targets only)."));
4579 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4580 _("Print the name of each layer of the internal target stack."),
4581 &maintenanceprintlist
);
4583 add_setshow_boolean_cmd ("target-async", no_class
,
4585 Set whether gdb controls the inferior in asynchronous mode."), _("\
4586 Show whether gdb controls the inferior in asynchronous mode."), _("\
4587 Tells gdb whether to control the inferior in asynchronous mode."),
4588 set_maint_target_async
,
4589 get_maint_target_async
,
4590 show_maint_target_async
,
4591 &maintenance_set_cmdlist
,
4592 &maintenance_show_cmdlist
);
4594 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4596 Set whether gdb always controls the inferior in non-stop mode."), _("\
4597 Show whether gdb always controls the inferior in non-stop mode."), _("\
4598 Tells gdb whether to control the inferior in non-stop mode."),
4599 set_maint_target_non_stop
,
4600 get_maint_target_non_stop
,
4601 show_maint_target_non_stop
,
4602 &maintenance_set_cmdlist
,
4603 &maintenance_show_cmdlist
);
4605 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4606 &may_write_registers_1
, _("\
4607 Set permission to write into registers."), _("\
4608 Show permission to write into registers."), _("\
4609 When this permission is on, GDB may write into the target's registers.\n\
4610 Otherwise, any sort of write attempt will result in an error."),
4611 set_target_permissions
, NULL
,
4612 &setlist
, &showlist
);
4614 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4615 &may_write_memory_1
, _("\
4616 Set permission to write into target memory."), _("\
4617 Show permission to write into target memory."), _("\
4618 When this permission is on, GDB may write into the target's memory.\n\
4619 Otherwise, any sort of write attempt will result in an error."),
4620 set_write_memory_permission
, NULL
,
4621 &setlist
, &showlist
);
4623 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4624 &may_insert_breakpoints_1
, _("\
4625 Set permission to insert breakpoints in the target."), _("\
4626 Show permission to insert breakpoints in the target."), _("\
4627 When this permission is on, GDB may insert breakpoints in the program.\n\
4628 Otherwise, any sort of insertion attempt will result in an error."),
4629 set_target_permissions
, NULL
,
4630 &setlist
, &showlist
);
4632 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4633 &may_insert_tracepoints_1
, _("\
4634 Set permission to insert tracepoints in the target."), _("\
4635 Show permission to insert tracepoints in the target."), _("\
4636 When this permission is on, GDB may insert tracepoints in the program.\n\
4637 Otherwise, any sort of insertion attempt will result in an error."),
4638 set_target_permissions
, NULL
,
4639 &setlist
, &showlist
);
4641 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4642 &may_insert_fast_tracepoints_1
, _("\
4643 Set permission to insert fast tracepoints in the target."), _("\
4644 Show permission to insert fast tracepoints in the target."), _("\
4645 When this permission is on, GDB may insert fast tracepoints.\n\
4646 Otherwise, any sort of insertion attempt will result in an error."),
4647 set_target_permissions
, NULL
,
4648 &setlist
, &showlist
);
4650 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4652 Set permission to interrupt or signal the target."), _("\
4653 Show permission to interrupt or signal the target."), _("\
4654 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4655 Otherwise, any attempt to interrupt or stop will be ignored."),
4656 set_target_permissions
, NULL
,
4657 &setlist
, &showlist
);
4659 add_com ("flash-erase", no_class
, flash_erase_command
,
4660 _("Erase all flash memory regions."));
4662 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4663 &auto_connect_native_target
, _("\
4664 Set whether GDB may automatically connect to the native target."), _("\
4665 Show whether GDB may automatically connect to the native target."), _("\
4666 When on, and GDB is not connected to a target yet, GDB\n\
4667 attempts \"run\" and other commands with the native target."),
4668 NULL
, show_auto_connect_native_target
,
4669 &setlist
, &showlist
);