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 gdb_printf (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 gdb_printf (gdb_stdlog
, "-> %s->open (...)\n",
853 func (args
, from_tty
);
856 gdb_printf (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 gdb_printf (_("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 gdb_printf (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 OBJFILE is a separate debug object file, look for the
1300 original object file. */
1301 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
1302 objfile
= objfile
->separate_debug_objfile_backlink
;
1304 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
1306 ptid_t ptid
= inferior_ptid
;
1312 /* Fetch the load module address for this objfile. */
1313 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
1316 if (gdbarch_get_thread_local_address_p (gdbarch
))
1317 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
1320 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
1322 /* If an error occurred, print TLS related messages here. Otherwise,
1323 throw the error to some higher catcher. */
1324 catch (const gdb_exception
&ex
)
1326 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1330 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1331 error (_("Cannot find thread-local variables "
1332 "in this thread library."));
1334 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1335 if (objfile_is_library
)
1336 error (_("Cannot find shared library `%s' in dynamic"
1337 " linker's load module list"), objfile_name (objfile
));
1339 error (_("Cannot find executable file `%s' in dynamic"
1340 " linker's load module list"), objfile_name (objfile
));
1342 case TLS_NOT_ALLOCATED_YET_ERROR
:
1343 if (objfile_is_library
)
1344 error (_("The inferior has not yet allocated storage for"
1345 " thread-local variables in\n"
1346 "the shared library `%s'\n"
1348 objfile_name (objfile
),
1349 target_pid_to_str (ptid
).c_str ());
1351 error (_("The inferior has not yet allocated storage for"
1352 " thread-local variables in\n"
1353 "the executable `%s'\n"
1355 objfile_name (objfile
),
1356 target_pid_to_str (ptid
).c_str ());
1358 case TLS_GENERIC_ERROR
:
1359 if (objfile_is_library
)
1360 error (_("Cannot find thread-local storage for %s, "
1361 "shared library %s:\n%s"),
1362 target_pid_to_str (ptid
).c_str (),
1363 objfile_name (objfile
), ex
.what ());
1365 error (_("Cannot find thread-local storage for %s, "
1366 "executable file %s:\n%s"),
1367 target_pid_to_str (ptid
).c_str (),
1368 objfile_name (objfile
), ex
.what ());
1377 error (_("Cannot find thread-local variables on this target"));
1383 target_xfer_status_to_string (enum target_xfer_status status
)
1385 #define CASE(X) case X: return #X
1388 CASE(TARGET_XFER_E_IO
);
1389 CASE(TARGET_XFER_UNAVAILABLE
);
1399 gdb::unique_xmalloc_ptr
<char>
1400 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
1402 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
1405 if (bytes_read
== nullptr)
1406 bytes_read
= &ignore
;
1408 /* Note that the endian-ness does not matter here. */
1409 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
1410 &buffer
, bytes_read
);
1414 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1417 const target_section_table
*
1418 target_get_section_table (struct target_ops
*target
)
1420 return target
->get_section_table ();
1423 /* Find a section containing ADDR. */
1425 const struct target_section
*
1426 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1428 const target_section_table
*table
= target_get_section_table (target
);
1433 for (const target_section
&secp
: *table
)
1435 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1443 const target_section_table
*
1444 default_get_section_table ()
1446 return ¤t_program_space
->target_sections ();
1449 /* Helper for the memory xfer routines. Checks the attributes of the
1450 memory region of MEMADDR against the read or write being attempted.
1451 If the access is permitted returns true, otherwise returns false.
1452 REGION_P is an optional output parameter. If not-NULL, it is
1453 filled with a pointer to the memory region of MEMADDR. REG_LEN
1454 returns LEN trimmed to the end of the region. This is how much the
1455 caller can continue requesting, if the access is permitted. A
1456 single xfer request must not straddle memory region boundaries. */
1459 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1460 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1461 struct mem_region
**region_p
)
1463 struct mem_region
*region
;
1465 region
= lookup_mem_region (memaddr
);
1467 if (region_p
!= NULL
)
1470 switch (region
->attrib
.mode
)
1473 if (writebuf
!= NULL
)
1478 if (readbuf
!= NULL
)
1483 /* We only support writing to flash during "load" for now. */
1484 if (writebuf
!= NULL
)
1485 error (_("Writing to flash memory forbidden in this context"));
1492 /* region->hi == 0 means there's no upper bound. */
1493 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1496 *reg_len
= region
->hi
- memaddr
;
1501 /* Read memory from more than one valid target. A core file, for
1502 instance, could have some of memory but delegate other bits to
1503 the target below it. So, we must manually try all targets. */
1505 enum target_xfer_status
1506 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1507 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1508 ULONGEST
*xfered_len
)
1510 enum target_xfer_status res
;
1514 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1515 readbuf
, writebuf
, memaddr
, len
,
1517 if (res
== TARGET_XFER_OK
)
1520 /* Stop if the target reports that the memory is not available. */
1521 if (res
== TARGET_XFER_UNAVAILABLE
)
1524 /* Don't continue past targets which have all the memory.
1525 At one time, this code was necessary to read data from
1526 executables / shared libraries when data for the requested
1527 addresses weren't available in the core file. But now the
1528 core target handles this case itself. */
1529 if (ops
->has_all_memory ())
1532 ops
= ops
->beneath ();
1534 while (ops
!= NULL
);
1536 /* The cache works at the raw memory level. Make sure the cache
1537 gets updated with raw contents no matter what kind of memory
1538 object was originally being written. Note we do write-through
1539 first, so that if it fails, we don't write to the cache contents
1540 that never made it to the target. */
1541 if (writebuf
!= NULL
1542 && inferior_ptid
!= null_ptid
1543 && target_dcache_init_p ()
1544 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1546 DCACHE
*dcache
= target_dcache_get ();
1548 /* Note that writing to an area of memory which wasn't present
1549 in the cache doesn't cause it to be loaded in. */
1550 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1556 /* Perform a partial memory transfer.
1557 For docs see target.h, to_xfer_partial. */
1559 static enum target_xfer_status
1560 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1561 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1562 ULONGEST len
, ULONGEST
*xfered_len
)
1564 enum target_xfer_status res
;
1566 struct mem_region
*region
;
1567 struct inferior
*inf
;
1569 /* For accesses to unmapped overlay sections, read directly from
1570 files. Must do this first, as MEMADDR may need adjustment. */
1571 if (readbuf
!= NULL
&& overlay_debugging
)
1573 struct obj_section
*section
= find_pc_overlay (memaddr
);
1575 if (pc_in_unmapped_range (memaddr
, section
))
1577 const target_section_table
*table
= target_get_section_table (ops
);
1578 const char *section_name
= section
->the_bfd_section
->name
;
1580 memaddr
= overlay_mapped_address (memaddr
, section
);
1582 auto match_cb
= [=] (const struct target_section
*s
)
1584 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1587 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1588 memaddr
, len
, xfered_len
,
1593 /* Try the executable files, if "trust-readonly-sections" is set. */
1594 if (readbuf
!= NULL
&& trust_readonly
)
1596 const struct target_section
*secp
1597 = target_section_by_addr (ops
, memaddr
);
1599 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1601 const target_section_table
*table
= target_get_section_table (ops
);
1602 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1603 memaddr
, len
, xfered_len
,
1608 /* Try GDB's internal data cache. */
1610 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1612 return TARGET_XFER_E_IO
;
1614 if (inferior_ptid
!= null_ptid
)
1615 inf
= current_inferior ();
1621 /* The dcache reads whole cache lines; that doesn't play well
1622 with reading from a trace buffer, because reading outside of
1623 the collected memory range fails. */
1624 && get_traceframe_number () == -1
1625 && (region
->attrib
.cache
1626 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1627 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1629 DCACHE
*dcache
= target_dcache_get_or_init ();
1631 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1632 reg_len
, xfered_len
);
1635 /* If none of those methods found the memory we wanted, fall back
1636 to a target partial transfer. Normally a single call to
1637 to_xfer_partial is enough; if it doesn't recognize an object
1638 it will call the to_xfer_partial of the next target down.
1639 But for memory this won't do. Memory is the only target
1640 object which can be read from more than one valid target.
1641 A core file, for instance, could have some of memory but
1642 delegate other bits to the target below it. So, we must
1643 manually try all targets. */
1645 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1648 /* If we still haven't got anything, return the last error. We
1653 /* Perform a partial memory transfer. For docs see target.h,
1656 static enum target_xfer_status
1657 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1658 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1659 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1661 enum target_xfer_status res
;
1663 /* Zero length requests are ok and require no work. */
1665 return TARGET_XFER_EOF
;
1667 memaddr
= address_significant (target_gdbarch (), memaddr
);
1669 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1670 breakpoint insns, thus hiding out from higher layers whether
1671 there are software breakpoints inserted in the code stream. */
1672 if (readbuf
!= NULL
)
1674 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1677 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1678 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1682 /* A large write request is likely to be partially satisfied
1683 by memory_xfer_partial_1. We will continually malloc
1684 and free a copy of the entire write request for breakpoint
1685 shadow handling even though we only end up writing a small
1686 subset of it. Cap writes to a limit specified by the target
1687 to mitigate this. */
1688 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1690 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1691 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1692 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1699 scoped_restore_tmpl
<int>
1700 make_scoped_restore_show_memory_breakpoints (int show
)
1702 return make_scoped_restore (&show_memory_breakpoints
, show
);
1705 /* For docs see target.h, to_xfer_partial. */
1707 enum target_xfer_status
1708 target_xfer_partial (struct target_ops
*ops
,
1709 enum target_object object
, const char *annex
,
1710 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1711 ULONGEST offset
, ULONGEST len
,
1712 ULONGEST
*xfered_len
)
1714 enum target_xfer_status retval
;
1716 /* Transfer is done when LEN is zero. */
1718 return TARGET_XFER_EOF
;
1720 if (writebuf
&& !may_write_memory
)
1721 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1722 core_addr_to_string_nz (offset
), plongest (len
));
1726 /* If this is a memory transfer, let the memory-specific code
1727 have a look at it instead. Memory transfers are more
1729 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1730 || object
== TARGET_OBJECT_CODE_MEMORY
)
1731 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1732 writebuf
, offset
, len
, xfered_len
);
1733 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1735 /* Skip/avoid accessing the target if the memory region
1736 attributes block the access. Check this here instead of in
1737 raw_memory_xfer_partial as otherwise we'd end up checking
1738 this twice in the case of the memory_xfer_partial path is
1739 taken; once before checking the dcache, and another in the
1740 tail call to raw_memory_xfer_partial. */
1741 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1743 return TARGET_XFER_E_IO
;
1745 /* Request the normal memory object from other layers. */
1746 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1750 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1751 writebuf
, offset
, len
, xfered_len
);
1755 const unsigned char *myaddr
= NULL
;
1757 gdb_printf (gdb_stdlog
,
1758 "%s:target_xfer_partial "
1759 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1762 (annex
? annex
: "(null)"),
1763 host_address_to_string (readbuf
),
1764 host_address_to_string (writebuf
),
1765 core_addr_to_string_nz (offset
),
1766 pulongest (len
), retval
,
1767 pulongest (*xfered_len
));
1773 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1777 gdb_puts (", bytes =", gdb_stdlog
);
1778 for (i
= 0; i
< *xfered_len
; i
++)
1780 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1782 if (targetdebug
< 2 && i
> 0)
1784 gdb_printf (gdb_stdlog
, " ...");
1787 gdb_printf (gdb_stdlog
, "\n");
1790 gdb_printf (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1794 gdb_putc ('\n', gdb_stdlog
);
1797 /* Check implementations of to_xfer_partial update *XFERED_LEN
1798 properly. Do assertion after printing debug messages, so that we
1799 can find more clues on assertion failure from debugging messages. */
1800 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1801 gdb_assert (*xfered_len
> 0);
1806 /* Read LEN bytes of target memory at address MEMADDR, placing the
1807 results in GDB's memory at MYADDR. Returns either 0 for success or
1808 -1 if any error occurs.
1810 If an error occurs, no guarantee is made about the contents of the data at
1811 MYADDR. In particular, the caller should not depend upon partial reads
1812 filling the buffer with good data. There is no way for the caller to know
1813 how much good data might have been transfered anyway. Callers that can
1814 deal with partial reads should call target_read (which will retry until
1815 it makes no progress, and then return how much was transferred). */
1818 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1820 if (target_read (current_inferior ()->top_target (),
1821 TARGET_OBJECT_MEMORY
, NULL
,
1822 myaddr
, memaddr
, len
) == len
)
1828 /* See target/target.h. */
1831 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1836 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1839 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1840 gdbarch_byte_order (target_gdbarch ()));
1844 /* Like target_read_memory, but specify explicitly that this is a read
1845 from the target's raw memory. That is, this read bypasses the
1846 dcache, breakpoint shadowing, etc. */
1849 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1851 if (target_read (current_inferior ()->top_target (),
1852 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1853 myaddr
, memaddr
, len
) == len
)
1859 /* Like target_read_memory, but specify explicitly that this is a read from
1860 the target's stack. This may trigger different cache behavior. */
1863 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1865 if (target_read (current_inferior ()->top_target (),
1866 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1867 myaddr
, memaddr
, len
) == len
)
1873 /* Like target_read_memory, but specify explicitly that this is a read from
1874 the target's code. This may trigger different cache behavior. */
1877 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1879 if (target_read (current_inferior ()->top_target (),
1880 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1881 myaddr
, memaddr
, len
) == len
)
1887 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1888 Returns either 0 for success or -1 if any error occurs. If an
1889 error occurs, no guarantee is made about how much data got written.
1890 Callers that can deal with partial writes should call
1894 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1896 if (target_write (current_inferior ()->top_target (),
1897 TARGET_OBJECT_MEMORY
, NULL
,
1898 myaddr
, memaddr
, len
) == len
)
1904 /* Write LEN bytes from MYADDR to target raw memory at address
1905 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1906 If an error occurs, no guarantee is made about how much data got
1907 written. Callers that can deal with partial writes should call
1911 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1913 if (target_write (current_inferior ()->top_target (),
1914 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1915 myaddr
, memaddr
, len
) == len
)
1921 /* Fetch the target's memory map. */
1923 std::vector
<mem_region
>
1924 target_memory_map (void)
1926 target_ops
*target
= current_inferior ()->top_target ();
1927 std::vector
<mem_region
> result
= target
->memory_map ();
1928 if (result
.empty ())
1931 std::sort (result
.begin (), result
.end ());
1933 /* Check that regions do not overlap. Simultaneously assign
1934 a numbering for the "mem" commands to use to refer to
1936 mem_region
*last_one
= NULL
;
1937 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1939 mem_region
*this_one
= &result
[ix
];
1940 this_one
->number
= ix
;
1942 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1944 warning (_("Overlapping regions in memory map: ignoring"));
1945 return std::vector
<mem_region
> ();
1948 last_one
= this_one
;
1955 target_flash_erase (ULONGEST address
, LONGEST length
)
1957 current_inferior ()->top_target ()->flash_erase (address
, length
);
1961 target_flash_done (void)
1963 current_inferior ()->top_target ()->flash_done ();
1967 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1968 struct cmd_list_element
*c
, const char *value
)
1971 _("Mode for reading from readonly sections is %s.\n"),
1975 /* Target vector read/write partial wrapper functions. */
1977 static enum target_xfer_status
1978 target_read_partial (struct target_ops
*ops
,
1979 enum target_object object
,
1980 const char *annex
, gdb_byte
*buf
,
1981 ULONGEST offset
, ULONGEST len
,
1982 ULONGEST
*xfered_len
)
1984 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1988 static enum target_xfer_status
1989 target_write_partial (struct target_ops
*ops
,
1990 enum target_object object
,
1991 const char *annex
, const gdb_byte
*buf
,
1992 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1994 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1998 /* Wrappers to perform the full transfer. */
2000 /* For docs on target_read see target.h. */
2003 target_read (struct target_ops
*ops
,
2004 enum target_object object
,
2005 const char *annex
, gdb_byte
*buf
,
2006 ULONGEST offset
, LONGEST len
)
2008 LONGEST xfered_total
= 0;
2011 /* If we are reading from a memory object, find the length of an addressable
2012 unit for that architecture. */
2013 if (object
== TARGET_OBJECT_MEMORY
2014 || object
== TARGET_OBJECT_STACK_MEMORY
2015 || object
== TARGET_OBJECT_CODE_MEMORY
2016 || object
== TARGET_OBJECT_RAW_MEMORY
)
2017 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2019 while (xfered_total
< len
)
2021 ULONGEST xfered_partial
;
2022 enum target_xfer_status status
;
2024 status
= target_read_partial (ops
, object
, annex
,
2025 buf
+ xfered_total
* unit_size
,
2026 offset
+ xfered_total
, len
- xfered_total
,
2029 /* Call an observer, notifying them of the xfer progress? */
2030 if (status
== TARGET_XFER_EOF
)
2031 return xfered_total
;
2032 else if (status
== TARGET_XFER_OK
)
2034 xfered_total
+= xfered_partial
;
2038 return TARGET_XFER_E_IO
;
2044 /* Assuming that the entire [begin, end) range of memory cannot be
2045 read, try to read whatever subrange is possible to read.
2047 The function returns, in RESULT, either zero or one memory block.
2048 If there's a readable subrange at the beginning, it is completely
2049 read and returned. Any further readable subrange will not be read.
2050 Otherwise, if there's a readable subrange at the end, it will be
2051 completely read and returned. Any readable subranges before it
2052 (obviously, not starting at the beginning), will be ignored. In
2053 other cases -- either no readable subrange, or readable subrange(s)
2054 that is neither at the beginning, or end, nothing is returned.
2056 The purpose of this function is to handle a read across a boundary
2057 of accessible memory in a case when memory map is not available.
2058 The above restrictions are fine for this case, but will give
2059 incorrect results if the memory is 'patchy'. However, supporting
2060 'patchy' memory would require trying to read every single byte,
2061 and it seems unacceptable solution. Explicit memory map is
2062 recommended for this case -- and target_read_memory_robust will
2063 take care of reading multiple ranges then. */
2066 read_whatever_is_readable (struct target_ops
*ops
,
2067 const ULONGEST begin
, const ULONGEST end
,
2069 std::vector
<memory_read_result
> *result
)
2071 ULONGEST current_begin
= begin
;
2072 ULONGEST current_end
= end
;
2074 ULONGEST xfered_len
;
2076 /* If we previously failed to read 1 byte, nothing can be done here. */
2077 if (end
- begin
<= 1)
2080 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2082 /* Check that either first or the last byte is readable, and give up
2083 if not. This heuristic is meant to permit reading accessible memory
2084 at the boundary of accessible region. */
2085 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2086 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2091 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2092 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2093 &xfered_len
) == TARGET_XFER_OK
)
2101 /* Loop invariant is that the [current_begin, current_end) was previously
2102 found to be not readable as a whole.
2104 Note loop condition -- if the range has 1 byte, we can't divide the range
2105 so there's no point trying further. */
2106 while (current_end
- current_begin
> 1)
2108 ULONGEST first_half_begin
, first_half_end
;
2109 ULONGEST second_half_begin
, second_half_end
;
2111 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2115 first_half_begin
= current_begin
;
2116 first_half_end
= middle
;
2117 second_half_begin
= middle
;
2118 second_half_end
= current_end
;
2122 first_half_begin
= middle
;
2123 first_half_end
= current_end
;
2124 second_half_begin
= current_begin
;
2125 second_half_end
= middle
;
2128 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2129 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2131 first_half_end
- first_half_begin
);
2133 if (xfer
== first_half_end
- first_half_begin
)
2135 /* This half reads up fine. So, the error must be in the
2137 current_begin
= second_half_begin
;
2138 current_end
= second_half_end
;
2142 /* This half is not readable. Because we've tried one byte, we
2143 know some part of this half if actually readable. Go to the next
2144 iteration to divide again and try to read.
2146 We don't handle the other half, because this function only tries
2147 to read a single readable subrange. */
2148 current_begin
= first_half_begin
;
2149 current_end
= first_half_end
;
2155 /* The [begin, current_begin) range has been read. */
2156 result
->emplace_back (begin
, current_end
, std::move (buf
));
2160 /* The [current_end, end) range has been read. */
2161 LONGEST region_len
= end
- current_end
;
2163 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2164 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2165 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2166 region_len
* unit_size
);
2167 result
->emplace_back (current_end
, end
, std::move (data
));
2171 std::vector
<memory_read_result
>
2172 read_memory_robust (struct target_ops
*ops
,
2173 const ULONGEST offset
, const LONGEST len
)
2175 std::vector
<memory_read_result
> result
;
2176 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2178 LONGEST xfered_total
= 0;
2179 while (xfered_total
< len
)
2181 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2184 /* If there is no explicit region, a fake one should be created. */
2185 gdb_assert (region
);
2187 if (region
->hi
== 0)
2188 region_len
= len
- xfered_total
;
2190 region_len
= region
->hi
- offset
;
2192 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2194 /* Cannot read this region. Note that we can end up here only
2195 if the region is explicitly marked inaccessible, or
2196 'inaccessible-by-default' is in effect. */
2197 xfered_total
+= region_len
;
2201 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2202 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2203 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2205 LONGEST xfered_partial
=
2206 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2207 offset
+ xfered_total
, to_read
);
2208 /* Call an observer, notifying them of the xfer progress? */
2209 if (xfered_partial
<= 0)
2211 /* Got an error reading full chunk. See if maybe we can read
2213 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2214 offset
+ xfered_total
+ to_read
,
2215 unit_size
, &result
);
2216 xfered_total
+= to_read
;
2220 result
.emplace_back (offset
+ xfered_total
,
2221 offset
+ xfered_total
+ xfered_partial
,
2222 std::move (buffer
));
2223 xfered_total
+= xfered_partial
;
2233 /* An alternative to target_write with progress callbacks. */
2236 target_write_with_progress (struct target_ops
*ops
,
2237 enum target_object object
,
2238 const char *annex
, const gdb_byte
*buf
,
2239 ULONGEST offset
, LONGEST len
,
2240 void (*progress
) (ULONGEST
, void *), void *baton
)
2242 LONGEST xfered_total
= 0;
2245 /* If we are writing to a memory object, find the length of an addressable
2246 unit for that architecture. */
2247 if (object
== TARGET_OBJECT_MEMORY
2248 || object
== TARGET_OBJECT_STACK_MEMORY
2249 || object
== TARGET_OBJECT_CODE_MEMORY
2250 || object
== TARGET_OBJECT_RAW_MEMORY
)
2251 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2253 /* Give the progress callback a chance to set up. */
2255 (*progress
) (0, baton
);
2257 while (xfered_total
< len
)
2259 ULONGEST xfered_partial
;
2260 enum target_xfer_status status
;
2262 status
= target_write_partial (ops
, object
, annex
,
2263 buf
+ xfered_total
* unit_size
,
2264 offset
+ xfered_total
, len
- xfered_total
,
2267 if (status
!= TARGET_XFER_OK
)
2268 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2271 (*progress
) (xfered_partial
, baton
);
2273 xfered_total
+= xfered_partial
;
2279 /* For docs on target_write see target.h. */
2282 target_write (struct target_ops
*ops
,
2283 enum target_object object
,
2284 const char *annex
, const gdb_byte
*buf
,
2285 ULONGEST offset
, LONGEST len
)
2287 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2291 /* Help for target_read_alloc and target_read_stralloc. See their comments
2294 template <typename T
>
2295 gdb::optional
<gdb::def_vector
<T
>>
2296 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2299 gdb::def_vector
<T
> buf
;
2301 const int chunk
= 4096;
2303 /* This function does not have a length parameter; it reads the
2304 entire OBJECT). Also, it doesn't support objects fetched partly
2305 from one target and partly from another (in a different stratum,
2306 e.g. a core file and an executable). Both reasons make it
2307 unsuitable for reading memory. */
2308 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2310 /* Start by reading up to 4K at a time. The target will throttle
2311 this number down if necessary. */
2314 ULONGEST xfered_len
;
2315 enum target_xfer_status status
;
2317 buf
.resize (buf_pos
+ chunk
);
2319 status
= target_read_partial (ops
, object
, annex
,
2320 (gdb_byte
*) &buf
[buf_pos
],
2324 if (status
== TARGET_XFER_EOF
)
2326 /* Read all there was. */
2327 buf
.resize (buf_pos
);
2330 else if (status
!= TARGET_XFER_OK
)
2332 /* An error occurred. */
2336 buf_pos
+= xfered_len
;
2344 gdb::optional
<gdb::byte_vector
>
2345 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2348 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2353 gdb::optional
<gdb::char_vector
>
2354 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2357 gdb::optional
<gdb::char_vector
> buf
2358 = target_read_alloc_1
<char> (ops
, object
, annex
);
2363 if (buf
->empty () || buf
->back () != '\0')
2364 buf
->push_back ('\0');
2366 /* Check for embedded NUL bytes; but allow trailing NULs. */
2367 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2368 it
!= buf
->end (); it
++)
2371 warning (_("target object %d, annex %s, "
2372 "contained unexpected null characters"),
2373 (int) object
, annex
? annex
: "(none)");
2380 /* Memory transfer methods. */
2383 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2386 /* This method is used to read from an alternate, non-current
2387 target. This read must bypass the overlay support (as symbols
2388 don't match this target), and GDB's internal cache (wrong cache
2389 for this target). */
2390 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2392 memory_error (TARGET_XFER_E_IO
, addr
);
2396 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2397 int len
, enum bfd_endian byte_order
)
2399 gdb_byte buf
[sizeof (ULONGEST
)];
2401 gdb_assert (len
<= sizeof (buf
));
2402 get_target_memory (ops
, addr
, buf
, len
);
2403 return extract_unsigned_integer (buf
, len
, byte_order
);
2409 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2410 struct bp_target_info
*bp_tgt
)
2412 if (!may_insert_breakpoints
)
2414 warning (_("May not insert breakpoints"));
2418 target_ops
*target
= current_inferior ()->top_target ();
2420 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2426 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2427 struct bp_target_info
*bp_tgt
,
2428 enum remove_bp_reason reason
)
2430 /* This is kind of a weird case to handle, but the permission might
2431 have been changed after breakpoints were inserted - in which case
2432 we should just take the user literally and assume that any
2433 breakpoints should be left in place. */
2434 if (!may_insert_breakpoints
)
2436 warning (_("May not remove breakpoints"));
2440 target_ops
*target
= current_inferior ()->top_target ();
2442 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2446 info_target_command (const char *args
, int from_tty
)
2448 int has_all_mem
= 0;
2450 if (current_program_space
->symfile_object_file
!= NULL
)
2452 objfile
*objf
= current_program_space
->symfile_object_file
;
2453 gdb_printf (_("Symbols from \"%s\".\n"),
2454 objfile_name (objf
));
2457 for (target_ops
*t
= current_inferior ()->top_target ();
2461 if (!t
->has_memory ())
2464 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2467 gdb_printf (_("\tWhile running this, "
2468 "GDB does not access memory from...\n"));
2469 gdb_printf ("%s:\n", t
->longname ());
2471 has_all_mem
= t
->has_all_memory ();
2475 /* This function is called before any new inferior is created, e.g.
2476 by running a program, attaching, or connecting to a target.
2477 It cleans up any state from previous invocations which might
2478 change between runs. This is a subset of what target_preopen
2479 resets (things which might change between targets). */
2482 target_pre_inferior (int from_tty
)
2484 /* Clear out solib state. Otherwise the solib state of the previous
2485 inferior might have survived and is entirely wrong for the new
2486 target. This has been observed on GNU/Linux using glibc 2.3. How
2498 Cannot access memory at address 0xdeadbeef
2501 /* In some OSs, the shared library list is the same/global/shared
2502 across inferiors. If code is shared between processes, so are
2503 memory regions and features. */
2504 if (!gdbarch_has_global_solist (target_gdbarch ()))
2506 no_shared_libraries (NULL
, from_tty
);
2508 invalidate_target_mem_regions ();
2510 target_clear_description ();
2513 /* attach_flag may be set if the previous process associated with
2514 the inferior was attached to. */
2515 current_inferior ()->attach_flag
= 0;
2517 current_inferior ()->highest_thread_num
= 0;
2519 agent_capability_invalidate ();
2522 /* This is to be called by the open routine before it does
2526 target_preopen (int from_tty
)
2530 if (current_inferior ()->pid
!= 0)
2533 || !target_has_execution ()
2534 || query (_("A program is being debugged already. Kill it? ")))
2536 /* Core inferiors actually should be detached, not
2538 if (target_has_execution ())
2541 target_detach (current_inferior (), 0);
2544 error (_("Program not killed."));
2547 /* Calling target_kill may remove the target from the stack. But if
2548 it doesn't (which seems like a win for UDI), remove it now. */
2549 /* Leave the exec target, though. The user may be switching from a
2550 live process to a core of the same program. */
2551 pop_all_targets_above (file_stratum
);
2553 target_pre_inferior (from_tty
);
2559 target_detach (inferior
*inf
, int from_tty
)
2561 /* After we have detached, we will clear the register cache for this inferior
2562 by calling registers_changed_ptid. We must save the pid_ptid before
2563 detaching, as the target detach method will clear inf->pid. */
2564 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2566 /* As long as some to_detach implementations rely on the current_inferior
2567 (either directly, or indirectly, like through target_gdbarch or by
2568 reading memory), INF needs to be the current inferior. When that
2569 requirement will become no longer true, then we can remove this
2571 gdb_assert (inf
== current_inferior ());
2573 prepare_for_detach ();
2575 /* Hold a strong reference because detaching may unpush the
2577 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2579 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2581 process_stratum_target
*proc_target
2582 = as_process_stratum_target (proc_target_ref
.get ());
2584 registers_changed_ptid (proc_target
, save_pid_ptid
);
2586 /* We have to ensure we have no frame cache left. Normally,
2587 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2588 inferior_ptid matches save_pid_ptid, but in our case, it does not
2589 call it, as inferior_ptid has been reset. */
2590 reinit_frame_cache ();
2594 target_disconnect (const char *args
, int from_tty
)
2596 /* If we're in breakpoints-always-inserted mode or if breakpoints
2597 are global across processes, we have to remove them before
2599 remove_breakpoints ();
2601 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2604 /* See target/target.h. */
2607 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2608 target_wait_flags options
)
2610 target_ops
*target
= current_inferior ()->top_target ();
2611 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2613 gdb_assert (!proc_target
->commit_resumed_state
);
2615 if (!target_can_async_p (target
))
2616 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2620 gdb::observers::target_pre_wait
.notify (ptid
);
2621 ptid_t event_ptid
= target
->wait (ptid
, status
, options
);
2622 gdb::observers::target_post_wait
.notify (event_ptid
);
2627 gdb::observers::target_post_wait
.notify (null_ptid
);
2635 default_target_wait (struct target_ops
*ops
,
2636 ptid_t ptid
, struct target_waitstatus
*status
,
2637 target_wait_flags options
)
2639 status
->set_ignore ();
2640 return minus_one_ptid
;
2644 target_pid_to_str (ptid_t ptid
)
2646 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2650 target_thread_name (struct thread_info
*info
)
2652 gdb_assert (info
->inf
== current_inferior ());
2654 return current_inferior ()->top_target ()->thread_name (info
);
2657 struct thread_info
*
2658 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2660 struct inferior
*inf
)
2662 target_ops
*target
= current_inferior ()->top_target ();
2664 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2670 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2672 target_ops
*target
= current_inferior ()->top_target ();
2674 return target
->thread_info_to_thread_handle (tip
);
2678 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2680 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2681 gdb_assert (!curr_target
->commit_resumed_state
);
2683 target_dcache_invalidate ();
2685 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2687 registers_changed_ptid (curr_target
, ptid
);
2688 /* We only set the internal executing state here. The user/frontend
2689 running state is set at a higher level. This also clears the
2690 thread's stop_pc as side effect. */
2691 set_executing (curr_target
, ptid
, true);
2692 clear_inline_frame_state (curr_target
, ptid
);
2694 if (target_can_async_p ())
2701 target_commit_resumed ()
2703 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2704 current_inferior ()->top_target ()->commit_resumed ();
2710 target_has_pending_events ()
2712 return current_inferior ()->top_target ()->has_pending_events ();
2716 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2718 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2722 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2724 current_inferior ()->top_target ()->program_signals (program_signals
);
2728 default_follow_fork (struct target_ops
*self
, inferior
*child_inf
,
2729 ptid_t child_ptid
, target_waitkind fork_kind
,
2730 bool follow_child
, bool detach_fork
)
2732 /* Some target returned a fork event, but did not know how to follow it. */
2733 internal_error (__FILE__
, __LINE__
,
2734 _("could not find a target to follow fork"));
2740 target_follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
2741 target_waitkind fork_kind
, bool follow_child
,
2744 target_ops
*target
= current_inferior ()->top_target ();
2746 /* Check consistency between CHILD_INF, CHILD_PTID, FOLLOW_CHILD and
2748 if (child_inf
!= nullptr)
2750 gdb_assert (follow_child
|| !detach_fork
);
2751 gdb_assert (child_inf
->pid
== child_ptid
.pid ());
2754 gdb_assert (!follow_child
&& detach_fork
);
2756 return target
->follow_fork (child_inf
, child_ptid
, fork_kind
, follow_child
,
2763 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2764 const char *execd_pathname
)
2766 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2771 default_mourn_inferior (struct target_ops
*self
)
2773 internal_error (__FILE__
, __LINE__
,
2774 _("could not find a target to follow mourn inferior"));
2778 target_mourn_inferior (ptid_t ptid
)
2780 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2781 current_inferior ()->top_target ()->mourn_inferior ();
2783 /* We no longer need to keep handles on any of the object files.
2784 Make sure to release them to avoid unnecessarily locking any
2785 of them while we're not actually debugging. */
2786 bfd_cache_close_all ();
2789 /* Look for a target which can describe architectural features, starting
2790 from TARGET. If we find one, return its description. */
2792 const struct target_desc
*
2793 target_read_description (struct target_ops
*target
)
2795 return target
->read_description ();
2799 /* Default implementation of memory-searching. */
2802 default_search_memory (struct target_ops
*self
,
2803 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2804 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2805 CORE_ADDR
*found_addrp
)
2807 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2809 return target_read (current_inferior ()->top_target (),
2810 TARGET_OBJECT_MEMORY
, NULL
,
2811 result
, addr
, len
) == len
;
2814 /* Start over from the top of the target stack. */
2815 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2816 pattern
, pattern_len
, found_addrp
);
2819 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2820 sequence of bytes in PATTERN with length PATTERN_LEN.
2822 The result is 1 if found, 0 if not found, and -1 if there was an error
2823 requiring halting of the search (e.g. memory read error).
2824 If the pattern is found the address is recorded in FOUND_ADDRP. */
2827 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2828 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2829 CORE_ADDR
*found_addrp
)
2831 target_ops
*target
= current_inferior ()->top_target ();
2833 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2834 pattern_len
, found_addrp
);
2837 /* Look through the currently pushed targets. If none of them will
2838 be able to restart the currently running process, issue an error
2842 target_require_runnable (void)
2844 for (target_ops
*t
= current_inferior ()->top_target ();
2848 /* If this target knows how to create a new program, then
2849 assume we will still be able to after killing the current
2850 one. Either killing and mourning will not pop T, or else
2851 find_default_run_target will find it again. */
2852 if (t
->can_create_inferior ())
2855 /* Do not worry about targets at certain strata that can not
2856 create inferiors. Assume they will be pushed again if
2857 necessary, and continue to the process_stratum. */
2858 if (t
->stratum () > process_stratum
)
2861 error (_("The \"%s\" target does not support \"run\". "
2862 "Try \"help target\" or \"continue\"."),
2866 /* This function is only called if the target is running. In that
2867 case there should have been a process_stratum target and it
2868 should either know how to create inferiors, or not... */
2869 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2872 /* Whether GDB is allowed to fall back to the default run target for
2873 "run", "attach", etc. when no target is connected yet. */
2874 static bool auto_connect_native_target
= true;
2877 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2878 struct cmd_list_element
*c
, const char *value
)
2881 _("Whether GDB may automatically connect to the "
2882 "native target is %s.\n"),
2886 /* A pointer to the target that can respond to "run" or "attach".
2887 Native targets are always singletons and instantiated early at GDB
2889 static target_ops
*the_native_target
;
2894 set_native_target (target_ops
*target
)
2896 if (the_native_target
!= NULL
)
2897 internal_error (__FILE__
, __LINE__
,
2898 _("native target already set (\"%s\")."),
2899 the_native_target
->longname ());
2901 the_native_target
= target
;
2907 get_native_target ()
2909 return the_native_target
;
2912 /* Look through the list of possible targets for a target that can
2913 execute a run or attach command without any other data. This is
2914 used to locate the default process stratum.
2916 If DO_MESG is not NULL, the result is always valid (error() is
2917 called for errors); else, return NULL on error. */
2919 static struct target_ops
*
2920 find_default_run_target (const char *do_mesg
)
2922 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2923 return the_native_target
;
2925 if (do_mesg
!= NULL
)
2926 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2933 find_attach_target (void)
2935 /* If a target on the current stack can attach, use it. */
2936 for (target_ops
*t
= current_inferior ()->top_target ();
2940 if (t
->can_attach ())
2944 /* Otherwise, use the default run target for attaching. */
2945 return find_default_run_target ("attach");
2951 find_run_target (void)
2953 /* If a target on the current stack can run, use it. */
2954 for (target_ops
*t
= current_inferior ()->top_target ();
2958 if (t
->can_create_inferior ())
2962 /* Otherwise, use the default run target. */
2963 return find_default_run_target ("run");
2967 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2972 /* Implement the "info proc" command. */
2975 target_info_proc (const char *args
, enum info_proc_what what
)
2977 struct target_ops
*t
;
2979 /* If we're already connected to something that can get us OS
2980 related data, use it. Otherwise, try using the native
2982 t
= find_target_at (process_stratum
);
2984 t
= find_default_run_target (NULL
);
2986 for (; t
!= NULL
; t
= t
->beneath ())
2988 if (t
->info_proc (args
, what
))
2991 gdb_printf (gdb_stdlog
,
2992 "target_info_proc (\"%s\", %d)\n", args
, what
);
3002 find_default_supports_disable_randomization (struct target_ops
*self
)
3004 struct target_ops
*t
;
3006 t
= find_default_run_target (NULL
);
3008 return t
->supports_disable_randomization ();
3013 target_supports_disable_randomization (void)
3015 return current_inferior ()->top_target ()->supports_disable_randomization ();
3018 /* See target/target.h. */
3021 target_supports_multi_process (void)
3023 return current_inferior ()->top_target ()->supports_multi_process ();
3028 gdb::optional
<gdb::char_vector
>
3029 target_get_osdata (const char *type
)
3031 struct target_ops
*t
;
3033 /* If we're already connected to something that can get us OS
3034 related data, use it. Otherwise, try using the native
3036 t
= find_target_at (process_stratum
);
3038 t
= find_default_run_target ("get OS data");
3043 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3046 /* Determine the current address space of thread PTID. */
3048 struct address_space
*
3049 target_thread_address_space (ptid_t ptid
)
3051 struct address_space
*aspace
;
3053 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3054 gdb_assert (aspace
!= NULL
);
3062 target_ops::beneath () const
3064 return current_inferior ()->find_target_beneath (this);
3068 target_ops::close ()
3073 target_ops::can_attach ()
3079 target_ops::attach (const char *, int)
3081 gdb_assert_not_reached ("target_ops::attach called");
3085 target_ops::can_create_inferior ()
3091 target_ops::create_inferior (const char *, const std::string
&,
3094 gdb_assert_not_reached ("target_ops::create_inferior called");
3098 target_ops::can_run ()
3106 for (target_ops
*t
= current_inferior ()->top_target ();
3117 /* Target file operations. */
3119 static struct target_ops
*
3120 default_fileio_target (void)
3122 struct target_ops
*t
;
3124 /* If we're already connected to something that can perform
3125 file I/O, use it. Otherwise, try using the native target. */
3126 t
= find_target_at (process_stratum
);
3129 return find_default_run_target ("file I/O");
3132 /* File handle for target file operations. */
3136 /* The target on which this file is open. NULL if the target is
3137 meanwhile closed while the handle is open. */
3140 /* The file descriptor on the target. */
3143 /* Check whether this fileio_fh_t represents a closed file. */
3146 return target_fd
< 0;
3150 /* Vector of currently open file handles. The value returned by
3151 target_fileio_open and passed as the FD argument to other
3152 target_fileio_* functions is an index into this vector. This
3153 vector's entries are never freed; instead, files are marked as
3154 closed, and the handle becomes available for reuse. */
3155 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3157 /* Index into fileio_fhandles of the lowest handle that might be
3158 closed. This permits handle reuse without searching the whole
3159 list each time a new file is opened. */
3160 static int lowest_closed_fd
;
3165 fileio_handles_invalidate_target (target_ops
*targ
)
3167 for (fileio_fh_t
&fh
: fileio_fhandles
)
3168 if (fh
.target
== targ
)
3172 /* Acquire a target fileio file descriptor. */
3175 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3177 /* Search for closed handles to reuse. */
3178 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3180 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3182 if (fh
.is_closed ())
3186 /* Push a new handle if no closed handles were found. */
3187 if (lowest_closed_fd
== fileio_fhandles
.size ())
3188 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3190 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3192 /* Should no longer be marked closed. */
3193 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3195 /* Return its index, and start the next lookup at
3197 return lowest_closed_fd
++;
3200 /* Release a target fileio file descriptor. */
3203 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3206 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3209 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3211 static fileio_fh_t
*
3212 fileio_fd_to_fh (int fd
)
3214 return &fileio_fhandles
[fd
];
3218 /* Default implementations of file i/o methods. We don't want these
3219 to delegate automatically, because we need to know which target
3220 supported the method, in order to call it directly from within
3221 pread/pwrite, etc. */
3224 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3225 int flags
, int mode
, int warn_if_slow
,
3228 *target_errno
= FILEIO_ENOSYS
;
3233 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3234 ULONGEST offset
, int *target_errno
)
3236 *target_errno
= FILEIO_ENOSYS
;
3241 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3242 ULONGEST offset
, int *target_errno
)
3244 *target_errno
= FILEIO_ENOSYS
;
3249 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3251 *target_errno
= FILEIO_ENOSYS
;
3256 target_ops::fileio_close (int fd
, int *target_errno
)
3258 *target_errno
= FILEIO_ENOSYS
;
3263 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3266 *target_errno
= FILEIO_ENOSYS
;
3270 gdb::optional
<std::string
>
3271 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3274 *target_errno
= FILEIO_ENOSYS
;
3281 target_fileio_open (struct inferior
*inf
, const char *filename
,
3282 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3284 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3286 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3287 warn_if_slow
, target_errno
);
3289 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3295 fd
= acquire_fileio_fd (t
, fd
);
3298 gdb_printf (gdb_stdlog
,
3299 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3301 inf
== NULL
? 0 : inf
->num
,
3302 filename
, flags
, mode
,
3304 fd
!= -1 ? 0 : *target_errno
);
3308 *target_errno
= FILEIO_ENOSYS
;
3315 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3316 ULONGEST offset
, int *target_errno
)
3318 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3321 if (fh
->is_closed ())
3322 *target_errno
= EBADF
;
3323 else if (fh
->target
== NULL
)
3324 *target_errno
= EIO
;
3326 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3327 len
, offset
, target_errno
);
3330 gdb_printf (gdb_stdlog
,
3331 "target_fileio_pwrite (%d,...,%d,%s) "
3333 fd
, len
, pulongest (offset
),
3334 ret
, ret
!= -1 ? 0 : *target_errno
);
3341 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3342 ULONGEST offset
, int *target_errno
)
3344 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3347 if (fh
->is_closed ())
3348 *target_errno
= EBADF
;
3349 else if (fh
->target
== NULL
)
3350 *target_errno
= EIO
;
3352 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3353 len
, offset
, target_errno
);
3356 gdb_printf (gdb_stdlog
,
3357 "target_fileio_pread (%d,...,%d,%s) "
3359 fd
, len
, pulongest (offset
),
3360 ret
, ret
!= -1 ? 0 : *target_errno
);
3367 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3369 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3372 if (fh
->is_closed ())
3373 *target_errno
= EBADF
;
3374 else if (fh
->target
== NULL
)
3375 *target_errno
= EIO
;
3377 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3380 gdb_printf (gdb_stdlog
,
3381 "target_fileio_fstat (%d) = %d (%d)\n",
3382 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3389 target_fileio_close (int fd
, int *target_errno
)
3391 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3394 if (fh
->is_closed ())
3395 *target_errno
= EBADF
;
3398 if (fh
->target
!= NULL
)
3399 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3403 release_fileio_fd (fd
, fh
);
3407 gdb_printf (gdb_stdlog
,
3408 "target_fileio_close (%d) = %d (%d)\n",
3409 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3416 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3419 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3421 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3423 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3427 gdb_printf (gdb_stdlog
,
3428 "target_fileio_unlink (%d,%s)"
3430 inf
== NULL
? 0 : inf
->num
, filename
,
3431 ret
, ret
!= -1 ? 0 : *target_errno
);
3435 *target_errno
= FILEIO_ENOSYS
;
3441 gdb::optional
<std::string
>
3442 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3445 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3447 gdb::optional
<std::string
> ret
3448 = t
->fileio_readlink (inf
, filename
, target_errno
);
3450 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3454 gdb_printf (gdb_stdlog
,
3455 "target_fileio_readlink (%d,%s)"
3457 inf
== NULL
? 0 : inf
->num
,
3458 filename
, ret
? ret
->c_str () : "(nil)",
3459 ret
? 0 : *target_errno
);
3463 *target_errno
= FILEIO_ENOSYS
;
3467 /* Like scoped_fd, but specific to target fileio. */
3469 class scoped_target_fd
3472 explicit scoped_target_fd (int fd
) noexcept
3477 ~scoped_target_fd ()
3483 target_fileio_close (m_fd
, &target_errno
);
3487 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3489 int get () const noexcept
3498 /* Read target file FILENAME, in the filesystem as seen by INF. If
3499 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3500 remote targets, the remote stub). Store the result in *BUF_P and
3501 return the size of the transferred data. PADDING additional bytes
3502 are available in *BUF_P. This is a helper function for
3503 target_fileio_read_alloc; see the declaration of that function for
3504 more information. */
3507 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3508 gdb_byte
**buf_p
, int padding
)
3510 size_t buf_alloc
, buf_pos
;
3515 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3516 0700, false, &target_errno
));
3517 if (fd
.get () == -1)
3520 /* Start by reading up to 4K at a time. The target will throttle
3521 this number down if necessary. */
3523 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3527 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3528 buf_alloc
- buf_pos
- padding
, buf_pos
,
3532 /* An error occurred. */
3538 /* Read all there was. */
3548 /* If the buffer is filling up, expand it. */
3549 if (buf_alloc
< buf_pos
* 2)
3552 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3562 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3565 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3570 gdb::unique_xmalloc_ptr
<char>
3571 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3575 LONGEST i
, transferred
;
3577 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3578 bufstr
= (char *) buffer
;
3580 if (transferred
< 0)
3581 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3583 if (transferred
== 0)
3584 return make_unique_xstrdup ("");
3586 bufstr
[transferred
] = 0;
3588 /* Check for embedded NUL bytes; but allow trailing NULs. */
3589 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3592 warning (_("target file %s "
3593 "contained unexpected null characters"),
3598 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3603 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3604 CORE_ADDR addr
, int len
)
3606 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3610 default_watchpoint_addr_within_range (struct target_ops
*target
,
3612 CORE_ADDR start
, int length
)
3614 return addr
>= start
&& addr
< start
+ length
;
3620 target_stack::find_beneath (const target_ops
*t
) const
3622 /* Look for a non-empty slot at stratum levels beneath T's. */
3623 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3624 if (m_stack
[stratum
] != NULL
)
3625 return m_stack
[stratum
];
3633 find_target_at (enum strata stratum
)
3635 return current_inferior ()->target_at (stratum
);
3643 target_announce_detach (int from_tty
)
3646 const char *exec_file
;
3651 pid
= inferior_ptid
.pid ();
3652 exec_file
= get_exec_file (0);
3653 if (exec_file
== nullptr)
3654 gdb_printf ("Detaching from pid %s\n",
3655 target_pid_to_str (ptid_t (pid
)).c_str ());
3657 gdb_printf (_("Detaching from program: %s, %s\n"), exec_file
,
3658 target_pid_to_str (ptid_t (pid
)).c_str ());
3664 target_announce_attach (int from_tty
, int pid
)
3669 const char *exec_file
= get_exec_file (0);
3671 if (exec_file
!= nullptr)
3672 gdb_printf ("Attaching to program: %s, %s\n", exec_file
,
3673 target_pid_to_str (ptid_t (pid
)).c_str ());
3675 gdb_printf ("Attaching to %s\n",
3676 target_pid_to_str (ptid_t (pid
)).c_str ());
3679 /* The inferior process has died. Long live the inferior! */
3682 generic_mourn_inferior (void)
3684 inferior
*inf
= current_inferior ();
3686 switch_to_no_thread ();
3688 /* Mark breakpoints uninserted in case something tries to delete a
3689 breakpoint while we delete the inferior's threads (which would
3690 fail, since the inferior is long gone). */
3691 mark_breakpoints_out ();
3694 exit_inferior (inf
);
3696 /* Note this wipes step-resume breakpoints, so needs to be done
3697 after exit_inferior, which ends up referencing the step-resume
3698 breakpoints through clear_thread_inferior_resources. */
3699 breakpoint_init_inferior (inf_exited
);
3701 registers_changed ();
3703 reopen_exec_file ();
3704 reinit_frame_cache ();
3706 if (deprecated_detach_hook
)
3707 deprecated_detach_hook ();
3710 /* Convert a normal process ID to a string. Returns the string in a
3714 normal_pid_to_str (ptid_t ptid
)
3716 return string_printf ("process %d", ptid
.pid ());
3720 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3722 return normal_pid_to_str (ptid
);
3725 /* Error-catcher for target_find_memory_regions. */
3727 dummy_find_memory_regions (struct target_ops
*self
,
3728 find_memory_region_ftype ignore1
, void *ignore2
)
3730 error (_("Command not implemented for this target."));
3734 /* Error-catcher for target_make_corefile_notes. */
3735 static gdb::unique_xmalloc_ptr
<char>
3736 dummy_make_corefile_notes (struct target_ops
*self
,
3737 bfd
*ignore1
, int *ignore2
)
3739 error (_("Command not implemented for this target."));
3743 #include "target-delegates.c"
3745 /* The initial current target, so that there is always a semi-valid
3748 static dummy_target the_dummy_target
;
3755 return &the_dummy_target
;
3758 static const target_info dummy_target_info
= {
3765 dummy_target::stratum () const
3767 return dummy_stratum
;
3771 debug_target::stratum () const
3773 return debug_stratum
;
3777 dummy_target::info () const
3779 return dummy_target_info
;
3783 debug_target::info () const
3785 return beneath ()->info ();
3791 target_close (struct target_ops
*targ
)
3793 for (inferior
*inf
: all_inferiors ())
3794 gdb_assert (!inf
->target_is_pushed (targ
));
3796 fileio_handles_invalidate_target (targ
);
3801 gdb_printf (gdb_stdlog
, "target_close ()\n");
3805 target_thread_alive (ptid_t ptid
)
3807 return current_inferior ()->top_target ()->thread_alive (ptid
);
3811 target_update_thread_list (void)
3813 current_inferior ()->top_target ()->update_thread_list ();
3817 target_stop (ptid_t ptid
)
3819 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3821 gdb_assert (!proc_target
->commit_resumed_state
);
3825 warning (_("May not interrupt or stop the target, ignoring attempt"));
3829 current_inferior ()->top_target ()->stop (ptid
);
3837 warning (_("May not interrupt or stop the target, ignoring attempt"));
3841 current_inferior ()->top_target ()->interrupt ();
3847 target_pass_ctrlc (void)
3849 /* Pass the Ctrl-C to the first target that has a thread
3851 for (inferior
*inf
: all_inferiors ())
3853 target_ops
*proc_target
= inf
->process_target ();
3854 if (proc_target
== NULL
)
3857 for (thread_info
*thr
: inf
->non_exited_threads ())
3859 /* A thread can be THREAD_STOPPED and executing, while
3860 running an infcall. */
3861 if (thr
->state
== THREAD_RUNNING
|| thr
->executing ())
3863 /* We can get here quite deep in target layers. Avoid
3864 switching thread context or anything that would
3865 communicate with the target (e.g., to fetch
3866 registers), or flushing e.g., the frame cache. We
3867 just switch inferior in order to be able to call
3868 through the target_stack. */
3869 scoped_restore_current_inferior restore_inferior
;
3870 set_current_inferior (inf
);
3871 current_inferior ()->top_target ()->pass_ctrlc ();
3881 default_target_pass_ctrlc (struct target_ops
*ops
)
3883 target_interrupt ();
3886 /* See target/target.h. */
3889 target_stop_and_wait (ptid_t ptid
)
3891 struct target_waitstatus status
;
3892 bool was_non_stop
= non_stop
;
3897 target_wait (ptid
, &status
, 0);
3899 non_stop
= was_non_stop
;
3902 /* See target/target.h. */
3905 target_continue_no_signal (ptid_t ptid
)
3907 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3910 /* See target/target.h. */
3913 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3915 target_resume (ptid
, 0, signal
);
3918 /* Concatenate ELEM to LIST, a comma-separated list. */
3921 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3923 if (!list
->empty ())
3924 list
->append (", ");
3926 list
->append (elem
);
3929 /* Helper for target_options_to_string. If OPT is present in
3930 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3931 OPT is removed from TARGET_OPTIONS. */
3934 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3935 target_wait_flag opt
, const char *opt_str
)
3937 if ((*target_options
& opt
) != 0)
3939 str_comma_list_concat_elem (ret
, opt_str
);
3940 *target_options
&= ~opt
;
3947 target_options_to_string (target_wait_flags target_options
)
3951 #define DO_TARG_OPTION(OPT) \
3952 do_option (&target_options, &ret, OPT, #OPT)
3954 DO_TARG_OPTION (TARGET_WNOHANG
);
3956 if (target_options
!= 0)
3957 str_comma_list_concat_elem (&ret
, "unknown???");
3963 target_fetch_registers (struct regcache
*regcache
, int regno
)
3965 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3967 regcache
->debug_print_register ("target_fetch_registers", regno
);
3971 target_store_registers (struct regcache
*regcache
, int regno
)
3973 if (!may_write_registers
)
3974 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3976 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3979 regcache
->debug_print_register ("target_store_registers", regno
);
3984 target_core_of_thread (ptid_t ptid
)
3986 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3990 simple_verify_memory (struct target_ops
*ops
,
3991 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3993 LONGEST total_xfered
= 0;
3995 while (total_xfered
< size
)
3997 ULONGEST xfered_len
;
3998 enum target_xfer_status status
;
4000 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
4002 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
4003 buf
, NULL
, lma
+ total_xfered
, howmuch
,
4005 if (status
== TARGET_XFER_OK
4006 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
4008 total_xfered
+= xfered_len
;
4017 /* Default implementation of memory verification. */
4020 default_verify_memory (struct target_ops
*self
,
4021 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4023 /* Start over from the top of the target stack. */
4024 return simple_verify_memory (current_inferior ()->top_target (),
4025 data
, memaddr
, size
);
4029 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4031 target_ops
*target
= current_inferior ()->top_target ();
4033 return target
->verify_memory (data
, memaddr
, size
);
4036 /* The documentation for this function is in its prototype declaration in
4040 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4041 enum target_hw_bp_type rw
)
4043 target_ops
*target
= current_inferior ()->top_target ();
4045 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
4048 /* The documentation for this function is in its prototype declaration in
4052 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4053 enum target_hw_bp_type rw
)
4055 target_ops
*target
= current_inferior ()->top_target ();
4057 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4060 /* The documentation for this function is in its prototype declaration
4064 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4066 target_ops
*target
= current_inferior ()->top_target ();
4068 return target
->masked_watch_num_registers (addr
, mask
);
4071 /* The documentation for this function is in its prototype declaration
4075 target_ranged_break_num_registers (void)
4077 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4082 struct btrace_target_info
*
4083 target_enable_btrace (thread_info
*tp
, const struct btrace_config
*conf
)
4085 return current_inferior ()->top_target ()->enable_btrace (tp
, conf
);
4091 target_disable_btrace (struct btrace_target_info
*btinfo
)
4093 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4099 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4101 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4107 target_read_btrace (struct btrace_data
*btrace
,
4108 struct btrace_target_info
*btinfo
,
4109 enum btrace_read_type type
)
4111 target_ops
*target
= current_inferior ()->top_target ();
4113 return target
->read_btrace (btrace
, btinfo
, type
);
4118 const struct btrace_config
*
4119 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4121 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4127 target_stop_recording (void)
4129 current_inferior ()->top_target ()->stop_recording ();
4135 target_save_record (const char *filename
)
4137 current_inferior ()->top_target ()->save_record (filename
);
4143 target_supports_delete_record ()
4145 return current_inferior ()->top_target ()->supports_delete_record ();
4151 target_delete_record (void)
4153 current_inferior ()->top_target ()->delete_record ();
4159 target_record_method (ptid_t ptid
)
4161 return current_inferior ()->top_target ()->record_method (ptid
);
4167 target_record_is_replaying (ptid_t ptid
)
4169 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4175 target_record_will_replay (ptid_t ptid
, int dir
)
4177 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4183 target_record_stop_replaying (void)
4185 current_inferior ()->top_target ()->record_stop_replaying ();
4191 target_goto_record_begin (void)
4193 current_inferior ()->top_target ()->goto_record_begin ();
4199 target_goto_record_end (void)
4201 current_inferior ()->top_target ()->goto_record_end ();
4207 target_goto_record (ULONGEST insn
)
4209 current_inferior ()->top_target ()->goto_record (insn
);
4215 target_insn_history (int size
, gdb_disassembly_flags flags
)
4217 current_inferior ()->top_target ()->insn_history (size
, flags
);
4223 target_insn_history_from (ULONGEST from
, int size
,
4224 gdb_disassembly_flags flags
)
4226 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4232 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4233 gdb_disassembly_flags flags
)
4235 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4241 target_call_history (int size
, record_print_flags flags
)
4243 current_inferior ()->top_target ()->call_history (size
, flags
);
4249 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4251 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4257 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4259 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4264 const struct frame_unwind
*
4265 target_get_unwinder (void)
4267 return current_inferior ()->top_target ()->get_unwinder ();
4272 const struct frame_unwind
*
4273 target_get_tailcall_unwinder (void)
4275 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4281 target_prepare_to_generate_core (void)
4283 current_inferior ()->top_target ()->prepare_to_generate_core ();
4289 target_done_generating_core (void)
4291 current_inferior ()->top_target ()->done_generating_core ();
4296 static char targ_desc
[] =
4297 "Names of targets and files being debugged.\nShows the entire \
4298 stack of targets currently in use (including the exec-file,\n\
4299 core-file, and process, if any), as well as the symbol file name.";
4302 default_rcmd (struct target_ops
*self
, const char *command
,
4303 struct ui_file
*output
)
4305 error (_("\"monitor\" command not supported by this target."));
4309 do_monitor_command (const char *cmd
, int from_tty
)
4311 target_rcmd (cmd
, gdb_stdtarg
);
4314 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4318 flash_erase_command (const char *cmd
, int from_tty
)
4320 /* Used to communicate termination of flash operations to the target. */
4321 bool found_flash_region
= false;
4322 struct gdbarch
*gdbarch
= target_gdbarch ();
4324 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4326 /* Iterate over all memory regions. */
4327 for (const mem_region
&m
: mem_regions
)
4329 /* Is this a flash memory region? */
4330 if (m
.attrib
.mode
== MEM_FLASH
)
4332 found_flash_region
= true;
4333 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4335 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4337 current_uiout
->message (_("Erasing flash memory region at address "));
4338 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4339 current_uiout
->message (", size = ");
4340 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4341 current_uiout
->message ("\n");
4345 /* Did we do any flash operations? If so, we need to finalize them. */
4346 if (found_flash_region
)
4347 target_flash_done ();
4349 current_uiout
->message (_("No flash memory regions found.\n"));
4352 /* Print the name of each layers of our target stack. */
4355 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4357 gdb_printf (_("The current target stack is:\n"));
4359 for (target_ops
*t
= current_inferior ()->top_target ();
4363 if (t
->stratum () == debug_stratum
)
4365 gdb_printf (" - %s (%s)\n", t
->shortname (), t
->longname ());
4372 target_async (int enable
)
4374 /* If we are trying to enable async mode then it must be the case that
4375 async mode is possible for this target. */
4376 gdb_assert (!enable
|| target_can_async_p ());
4377 infrun_async (enable
);
4378 current_inferior ()->top_target ()->async (enable
);
4384 target_thread_events (int enable
)
4386 current_inferior ()->top_target ()->thread_events (enable
);
4389 /* Controls if targets can report that they can/are async. This is
4390 just for maintainers to use when debugging gdb. */
4391 bool target_async_permitted
= true;
4394 set_maint_target_async (bool permitted
)
4396 if (have_live_inferiors ())
4397 error (_("Cannot change this setting while the inferior is running."));
4399 target_async_permitted
= permitted
;
4403 get_maint_target_async ()
4405 return target_async_permitted
;
4409 show_maint_target_async (ui_file
*file
, int from_tty
,
4410 cmd_list_element
*c
, const char *value
)
4413 _("Controlling the inferior in "
4414 "asynchronous mode is %s.\n"), value
);
4417 /* Return true if the target operates in non-stop mode even with "set
4421 target_always_non_stop_p (void)
4423 return current_inferior ()->top_target ()->always_non_stop_p ();
4429 target_is_non_stop_p ()
4432 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4433 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4434 && target_always_non_stop_p ()))
4435 && target_can_async_p ());
4441 exists_non_stop_target ()
4443 if (target_is_non_stop_p ())
4446 scoped_restore_current_thread restore_thread
;
4448 for (inferior
*inf
: all_inferiors ())
4450 switch_to_inferior_no_thread (inf
);
4451 if (target_is_non_stop_p ())
4458 /* Controls if targets can report that they always run in non-stop
4459 mode. This is just for maintainers to use when debugging gdb. */
4460 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4462 /* Set callback for maint target-non-stop setting. */
4465 set_maint_target_non_stop (auto_boolean enabled
)
4467 if (have_live_inferiors ())
4468 error (_("Cannot change this setting while the inferior is running."));
4470 target_non_stop_enabled
= enabled
;
4473 /* Get callback for maint target-non-stop setting. */
4476 get_maint_target_non_stop ()
4478 return target_non_stop_enabled
;
4482 show_maint_target_non_stop (ui_file
*file
, int from_tty
,
4483 cmd_list_element
*c
, const char *value
)
4485 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4487 _("Whether the target is always in non-stop mode "
4488 "is %s (currently %s).\n"), value
,
4489 target_always_non_stop_p () ? "on" : "off");
4492 _("Whether the target is always in non-stop mode "
4493 "is %s.\n"), value
);
4496 /* Temporary copies of permission settings. */
4498 static bool may_write_registers_1
= true;
4499 static bool may_write_memory_1
= true;
4500 static bool may_insert_breakpoints_1
= true;
4501 static bool may_insert_tracepoints_1
= true;
4502 static bool may_insert_fast_tracepoints_1
= true;
4503 static bool may_stop_1
= true;
4505 /* Make the user-set values match the real values again. */
4508 update_target_permissions (void)
4510 may_write_registers_1
= may_write_registers
;
4511 may_write_memory_1
= may_write_memory
;
4512 may_insert_breakpoints_1
= may_insert_breakpoints
;
4513 may_insert_tracepoints_1
= may_insert_tracepoints
;
4514 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4515 may_stop_1
= may_stop
;
4518 /* The one function handles (most of) the permission flags in the same
4522 set_target_permissions (const char *args
, int from_tty
,
4523 struct cmd_list_element
*c
)
4525 if (target_has_execution ())
4527 update_target_permissions ();
4528 error (_("Cannot change this setting while the inferior is running."));
4531 /* Make the real values match the user-changed values. */
4532 may_write_registers
= may_write_registers_1
;
4533 may_insert_breakpoints
= may_insert_breakpoints_1
;
4534 may_insert_tracepoints
= may_insert_tracepoints_1
;
4535 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4536 may_stop
= may_stop_1
;
4537 update_observer_mode ();
4540 /* Set memory write permission independently of observer mode. */
4543 set_write_memory_permission (const char *args
, int from_tty
,
4544 struct cmd_list_element
*c
)
4546 /* Make the real values match the user-changed values. */
4547 may_write_memory
= may_write_memory_1
;
4548 update_observer_mode ();
4551 void _initialize_target ();
4554 _initialize_target ()
4556 the_debug_target
= new debug_target ();
4558 add_info ("target", info_target_command
, targ_desc
);
4559 add_info ("files", info_target_command
, targ_desc
);
4561 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4562 Set target debugging."), _("\
4563 Show target debugging."), _("\
4564 When non-zero, target debugging is enabled. Higher numbers are more\n\
4568 &setdebuglist
, &showdebuglist
);
4570 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4571 &trust_readonly
, _("\
4572 Set mode for reading from readonly sections."), _("\
4573 Show mode for reading from readonly sections."), _("\
4574 When this mode is on, memory reads from readonly sections (such as .text)\n\
4575 will be read from the object file instead of from the target. This will\n\
4576 result in significant performance improvement for remote targets."),
4578 show_trust_readonly
,
4579 &setlist
, &showlist
);
4581 add_com ("monitor", class_obscure
, do_monitor_command
,
4582 _("Send a command to the remote monitor (remote targets only)."));
4584 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4585 _("Print the name of each layer of the internal target stack."),
4586 &maintenanceprintlist
);
4588 add_setshow_boolean_cmd ("target-async", no_class
,
4590 Set whether gdb controls the inferior in asynchronous mode."), _("\
4591 Show whether gdb controls the inferior in asynchronous mode."), _("\
4592 Tells gdb whether to control the inferior in asynchronous mode."),
4593 set_maint_target_async
,
4594 get_maint_target_async
,
4595 show_maint_target_async
,
4596 &maintenance_set_cmdlist
,
4597 &maintenance_show_cmdlist
);
4599 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4601 Set whether gdb always controls the inferior in non-stop mode."), _("\
4602 Show whether gdb always controls the inferior in non-stop mode."), _("\
4603 Tells gdb whether to control the inferior in non-stop mode."),
4604 set_maint_target_non_stop
,
4605 get_maint_target_non_stop
,
4606 show_maint_target_non_stop
,
4607 &maintenance_set_cmdlist
,
4608 &maintenance_show_cmdlist
);
4610 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4611 &may_write_registers_1
, _("\
4612 Set permission to write into registers."), _("\
4613 Show permission to write into registers."), _("\
4614 When this permission is on, GDB may write into the target's registers.\n\
4615 Otherwise, any sort of write attempt will result in an error."),
4616 set_target_permissions
, NULL
,
4617 &setlist
, &showlist
);
4619 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4620 &may_write_memory_1
, _("\
4621 Set permission to write into target memory."), _("\
4622 Show permission to write into target memory."), _("\
4623 When this permission is on, GDB may write into the target's memory.\n\
4624 Otherwise, any sort of write attempt will result in an error."),
4625 set_write_memory_permission
, NULL
,
4626 &setlist
, &showlist
);
4628 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4629 &may_insert_breakpoints_1
, _("\
4630 Set permission to insert breakpoints in the target."), _("\
4631 Show permission to insert breakpoints in the target."), _("\
4632 When this permission is on, GDB may insert breakpoints in the program.\n\
4633 Otherwise, any sort of insertion attempt will result in an error."),
4634 set_target_permissions
, NULL
,
4635 &setlist
, &showlist
);
4637 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4638 &may_insert_tracepoints_1
, _("\
4639 Set permission to insert tracepoints in the target."), _("\
4640 Show permission to insert tracepoints in the target."), _("\
4641 When this permission is on, GDB may insert tracepoints in the program.\n\
4642 Otherwise, any sort of insertion attempt will result in an error."),
4643 set_target_permissions
, NULL
,
4644 &setlist
, &showlist
);
4646 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4647 &may_insert_fast_tracepoints_1
, _("\
4648 Set permission to insert fast tracepoints in the target."), _("\
4649 Show permission to insert fast tracepoints in the target."), _("\
4650 When this permission is on, GDB may insert fast tracepoints.\n\
4651 Otherwise, any sort of insertion attempt will result in an error."),
4652 set_target_permissions
, NULL
,
4653 &setlist
, &showlist
);
4655 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4657 Set permission to interrupt or signal the target."), _("\
4658 Show permission to interrupt or signal the target."), _("\
4659 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4660 Otherwise, any attempt to interrupt or stop will be ignored."),
4661 set_target_permissions
, NULL
,
4662 &setlist
, &showlist
);
4664 add_com ("flash-erase", no_class
, flash_erase_command
,
4665 _("Erase all flash memory regions."));
4667 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4668 &auto_connect_native_target
, _("\
4669 Set whether GDB may automatically connect to the native target."), _("\
4670 Show whether GDB may automatically connect to the native target."), _("\
4671 When on, and GDB is not connected to a target yet, GDB\n\
4672 attempts \"run\" and other commands with the native target."),
4673 NULL
, show_auto_connect_native_target
,
4674 &setlist
, &showlist
);