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
= target_read_string (memaddr
, -1, 1, len
, &buffer
, bytes_read
);
1413 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1416 const target_section_table
*
1417 target_get_section_table (struct target_ops
*target
)
1419 return target
->get_section_table ();
1422 /* Find a section containing ADDR. */
1424 const struct target_section
*
1425 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1427 const target_section_table
*table
= target_get_section_table (target
);
1432 for (const target_section
&secp
: *table
)
1434 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1442 const target_section_table
*
1443 default_get_section_table ()
1445 return ¤t_program_space
->target_sections ();
1448 /* Helper for the memory xfer routines. Checks the attributes of the
1449 memory region of MEMADDR against the read or write being attempted.
1450 If the access is permitted returns true, otherwise returns false.
1451 REGION_P is an optional output parameter. If not-NULL, it is
1452 filled with a pointer to the memory region of MEMADDR. REG_LEN
1453 returns LEN trimmed to the end of the region. This is how much the
1454 caller can continue requesting, if the access is permitted. A
1455 single xfer request must not straddle memory region boundaries. */
1458 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1459 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1460 struct mem_region
**region_p
)
1462 struct mem_region
*region
;
1464 region
= lookup_mem_region (memaddr
);
1466 if (region_p
!= NULL
)
1469 switch (region
->attrib
.mode
)
1472 if (writebuf
!= NULL
)
1477 if (readbuf
!= NULL
)
1482 /* We only support writing to flash during "load" for now. */
1483 if (writebuf
!= NULL
)
1484 error (_("Writing to flash memory forbidden in this context"));
1491 /* region->hi == 0 means there's no upper bound. */
1492 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1495 *reg_len
= region
->hi
- memaddr
;
1500 /* Read memory from more than one valid target. A core file, for
1501 instance, could have some of memory but delegate other bits to
1502 the target below it. So, we must manually try all targets. */
1504 enum target_xfer_status
1505 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1506 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1507 ULONGEST
*xfered_len
)
1509 enum target_xfer_status res
;
1513 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1514 readbuf
, writebuf
, memaddr
, len
,
1516 if (res
== TARGET_XFER_OK
)
1519 /* Stop if the target reports that the memory is not available. */
1520 if (res
== TARGET_XFER_UNAVAILABLE
)
1523 /* Don't continue past targets which have all the memory.
1524 At one time, this code was necessary to read data from
1525 executables / shared libraries when data for the requested
1526 addresses weren't available in the core file. But now the
1527 core target handles this case itself. */
1528 if (ops
->has_all_memory ())
1531 ops
= ops
->beneath ();
1533 while (ops
!= NULL
);
1535 /* The cache works at the raw memory level. Make sure the cache
1536 gets updated with raw contents no matter what kind of memory
1537 object was originally being written. Note we do write-through
1538 first, so that if it fails, we don't write to the cache contents
1539 that never made it to the target. */
1540 if (writebuf
!= NULL
1541 && inferior_ptid
!= null_ptid
1542 && target_dcache_init_p ()
1543 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1545 DCACHE
*dcache
= target_dcache_get ();
1547 /* Note that writing to an area of memory which wasn't present
1548 in the cache doesn't cause it to be loaded in. */
1549 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1555 /* Perform a partial memory transfer.
1556 For docs see target.h, to_xfer_partial. */
1558 static enum target_xfer_status
1559 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1560 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1561 ULONGEST len
, ULONGEST
*xfered_len
)
1563 enum target_xfer_status res
;
1565 struct mem_region
*region
;
1566 struct inferior
*inf
;
1568 /* For accesses to unmapped overlay sections, read directly from
1569 files. Must do this first, as MEMADDR may need adjustment. */
1570 if (readbuf
!= NULL
&& overlay_debugging
)
1572 struct obj_section
*section
= find_pc_overlay (memaddr
);
1574 if (pc_in_unmapped_range (memaddr
, section
))
1576 const target_section_table
*table
= target_get_section_table (ops
);
1577 const char *section_name
= section
->the_bfd_section
->name
;
1579 memaddr
= overlay_mapped_address (memaddr
, section
);
1581 auto match_cb
= [=] (const struct target_section
*s
)
1583 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1586 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1587 memaddr
, len
, xfered_len
,
1592 /* Try the executable files, if "trust-readonly-sections" is set. */
1593 if (readbuf
!= NULL
&& trust_readonly
)
1595 const struct target_section
*secp
1596 = target_section_by_addr (ops
, memaddr
);
1598 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1600 const target_section_table
*table
= target_get_section_table (ops
);
1601 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1602 memaddr
, len
, xfered_len
,
1607 /* Try GDB's internal data cache. */
1609 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1611 return TARGET_XFER_E_IO
;
1613 if (inferior_ptid
!= null_ptid
)
1614 inf
= current_inferior ();
1620 /* The dcache reads whole cache lines; that doesn't play well
1621 with reading from a trace buffer, because reading outside of
1622 the collected memory range fails. */
1623 && get_traceframe_number () == -1
1624 && (region
->attrib
.cache
1625 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1626 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1628 DCACHE
*dcache
= target_dcache_get_or_init ();
1630 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1631 reg_len
, xfered_len
);
1634 /* If none of those methods found the memory we wanted, fall back
1635 to a target partial transfer. Normally a single call to
1636 to_xfer_partial is enough; if it doesn't recognize an object
1637 it will call the to_xfer_partial of the next target down.
1638 But for memory this won't do. Memory is the only target
1639 object which can be read from more than one valid target.
1640 A core file, for instance, could have some of memory but
1641 delegate other bits to the target below it. So, we must
1642 manually try all targets. */
1644 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1647 /* If we still haven't got anything, return the last error. We
1652 /* Perform a partial memory transfer. For docs see target.h,
1655 static enum target_xfer_status
1656 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1657 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1658 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1660 enum target_xfer_status res
;
1662 /* Zero length requests are ok and require no work. */
1664 return TARGET_XFER_EOF
;
1666 memaddr
= address_significant (target_gdbarch (), memaddr
);
1668 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1669 breakpoint insns, thus hiding out from higher layers whether
1670 there are software breakpoints inserted in the code stream. */
1671 if (readbuf
!= NULL
)
1673 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1676 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1677 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1681 /* A large write request is likely to be partially satisfied
1682 by memory_xfer_partial_1. We will continually malloc
1683 and free a copy of the entire write request for breakpoint
1684 shadow handling even though we only end up writing a small
1685 subset of it. Cap writes to a limit specified by the target
1686 to mitigate this. */
1687 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1689 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1690 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1691 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1698 scoped_restore_tmpl
<int>
1699 make_scoped_restore_show_memory_breakpoints (int show
)
1701 return make_scoped_restore (&show_memory_breakpoints
, show
);
1704 /* For docs see target.h, to_xfer_partial. */
1706 enum target_xfer_status
1707 target_xfer_partial (struct target_ops
*ops
,
1708 enum target_object object
, const char *annex
,
1709 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1710 ULONGEST offset
, ULONGEST len
,
1711 ULONGEST
*xfered_len
)
1713 enum target_xfer_status retval
;
1715 /* Transfer is done when LEN is zero. */
1717 return TARGET_XFER_EOF
;
1719 if (writebuf
&& !may_write_memory
)
1720 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1721 core_addr_to_string_nz (offset
), plongest (len
));
1725 /* If this is a memory transfer, let the memory-specific code
1726 have a look at it instead. Memory transfers are more
1728 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1729 || object
== TARGET_OBJECT_CODE_MEMORY
)
1730 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1731 writebuf
, offset
, len
, xfered_len
);
1732 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1734 /* Skip/avoid accessing the target if the memory region
1735 attributes block the access. Check this here instead of in
1736 raw_memory_xfer_partial as otherwise we'd end up checking
1737 this twice in the case of the memory_xfer_partial path is
1738 taken; once before checking the dcache, and another in the
1739 tail call to raw_memory_xfer_partial. */
1740 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1742 return TARGET_XFER_E_IO
;
1744 /* Request the normal memory object from other layers. */
1745 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1749 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1750 writebuf
, offset
, len
, xfered_len
);
1754 const unsigned char *myaddr
= NULL
;
1756 gdb_printf (gdb_stdlog
,
1757 "%s:target_xfer_partial "
1758 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1761 (annex
? annex
: "(null)"),
1762 host_address_to_string (readbuf
),
1763 host_address_to_string (writebuf
),
1764 core_addr_to_string_nz (offset
),
1765 pulongest (len
), retval
,
1766 pulongest (*xfered_len
));
1772 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1776 gdb_puts (", bytes =", gdb_stdlog
);
1777 for (i
= 0; i
< *xfered_len
; i
++)
1779 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1781 if (targetdebug
< 2 && i
> 0)
1783 gdb_printf (gdb_stdlog
, " ...");
1786 gdb_printf (gdb_stdlog
, "\n");
1789 gdb_printf (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1793 gdb_putc ('\n', gdb_stdlog
);
1796 /* Check implementations of to_xfer_partial update *XFERED_LEN
1797 properly. Do assertion after printing debug messages, so that we
1798 can find more clues on assertion failure from debugging messages. */
1799 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1800 gdb_assert (*xfered_len
> 0);
1805 /* Read LEN bytes of target memory at address MEMADDR, placing the
1806 results in GDB's memory at MYADDR. Returns either 0 for success or
1807 -1 if any error occurs.
1809 If an error occurs, no guarantee is made about the contents of the data at
1810 MYADDR. In particular, the caller should not depend upon partial reads
1811 filling the buffer with good data. There is no way for the caller to know
1812 how much good data might have been transfered anyway. Callers that can
1813 deal with partial reads should call target_read (which will retry until
1814 it makes no progress, and then return how much was transferred). */
1817 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1819 if (target_read (current_inferior ()->top_target (),
1820 TARGET_OBJECT_MEMORY
, NULL
,
1821 myaddr
, memaddr
, len
) == len
)
1827 /* See target/target.h. */
1830 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1835 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1838 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1839 gdbarch_byte_order (target_gdbarch ()));
1843 /* Like target_read_memory, but specify explicitly that this is a read
1844 from the target's raw memory. That is, this read bypasses the
1845 dcache, breakpoint shadowing, etc. */
1848 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1850 if (target_read (current_inferior ()->top_target (),
1851 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1852 myaddr
, memaddr
, len
) == len
)
1858 /* Like target_read_memory, but specify explicitly that this is a read from
1859 the target's stack. This may trigger different cache behavior. */
1862 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1864 if (target_read (current_inferior ()->top_target (),
1865 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1866 myaddr
, memaddr
, len
) == len
)
1872 /* Like target_read_memory, but specify explicitly that this is a read from
1873 the target's code. This may trigger different cache behavior. */
1876 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1878 if (target_read (current_inferior ()->top_target (),
1879 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1880 myaddr
, memaddr
, len
) == len
)
1886 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1887 Returns either 0 for success or -1 if any error occurs. If an
1888 error occurs, no guarantee is made about how much data got written.
1889 Callers that can deal with partial writes should call
1893 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1895 if (target_write (current_inferior ()->top_target (),
1896 TARGET_OBJECT_MEMORY
, NULL
,
1897 myaddr
, memaddr
, len
) == len
)
1903 /* Write LEN bytes from MYADDR to target raw memory at address
1904 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1905 If an error occurs, no guarantee is made about how much data got
1906 written. Callers that can deal with partial writes should call
1910 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1912 if (target_write (current_inferior ()->top_target (),
1913 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1914 myaddr
, memaddr
, len
) == len
)
1920 /* Fetch the target's memory map. */
1922 std::vector
<mem_region
>
1923 target_memory_map (void)
1925 target_ops
*target
= current_inferior ()->top_target ();
1926 std::vector
<mem_region
> result
= target
->memory_map ();
1927 if (result
.empty ())
1930 std::sort (result
.begin (), result
.end ());
1932 /* Check that regions do not overlap. Simultaneously assign
1933 a numbering for the "mem" commands to use to refer to
1935 mem_region
*last_one
= NULL
;
1936 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1938 mem_region
*this_one
= &result
[ix
];
1939 this_one
->number
= ix
;
1941 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1943 warning (_("Overlapping regions in memory map: ignoring"));
1944 return std::vector
<mem_region
> ();
1947 last_one
= this_one
;
1954 target_flash_erase (ULONGEST address
, LONGEST length
)
1956 current_inferior ()->top_target ()->flash_erase (address
, length
);
1960 target_flash_done (void)
1962 current_inferior ()->top_target ()->flash_done ();
1966 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1967 struct cmd_list_element
*c
, const char *value
)
1970 _("Mode for reading from readonly sections is %s.\n"),
1974 /* Target vector read/write partial wrapper functions. */
1976 static enum target_xfer_status
1977 target_read_partial (struct target_ops
*ops
,
1978 enum target_object object
,
1979 const char *annex
, gdb_byte
*buf
,
1980 ULONGEST offset
, ULONGEST len
,
1981 ULONGEST
*xfered_len
)
1983 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1987 static enum target_xfer_status
1988 target_write_partial (struct target_ops
*ops
,
1989 enum target_object object
,
1990 const char *annex
, const gdb_byte
*buf
,
1991 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1993 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1997 /* Wrappers to perform the full transfer. */
1999 /* For docs on target_read see target.h. */
2002 target_read (struct target_ops
*ops
,
2003 enum target_object object
,
2004 const char *annex
, gdb_byte
*buf
,
2005 ULONGEST offset
, LONGEST len
)
2007 LONGEST xfered_total
= 0;
2010 /* If we are reading from a memory object, find the length of an addressable
2011 unit for that architecture. */
2012 if (object
== TARGET_OBJECT_MEMORY
2013 || object
== TARGET_OBJECT_STACK_MEMORY
2014 || object
== TARGET_OBJECT_CODE_MEMORY
2015 || object
== TARGET_OBJECT_RAW_MEMORY
)
2016 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2018 while (xfered_total
< len
)
2020 ULONGEST xfered_partial
;
2021 enum target_xfer_status status
;
2023 status
= target_read_partial (ops
, object
, annex
,
2024 buf
+ xfered_total
* unit_size
,
2025 offset
+ xfered_total
, len
- xfered_total
,
2028 /* Call an observer, notifying them of the xfer progress? */
2029 if (status
== TARGET_XFER_EOF
)
2030 return xfered_total
;
2031 else if (status
== TARGET_XFER_OK
)
2033 xfered_total
+= xfered_partial
;
2037 return TARGET_XFER_E_IO
;
2043 /* Assuming that the entire [begin, end) range of memory cannot be
2044 read, try to read whatever subrange is possible to read.
2046 The function returns, in RESULT, either zero or one memory block.
2047 If there's a readable subrange at the beginning, it is completely
2048 read and returned. Any further readable subrange will not be read.
2049 Otherwise, if there's a readable subrange at the end, it will be
2050 completely read and returned. Any readable subranges before it
2051 (obviously, not starting at the beginning), will be ignored. In
2052 other cases -- either no readable subrange, or readable subrange(s)
2053 that is neither at the beginning, or end, nothing is returned.
2055 The purpose of this function is to handle a read across a boundary
2056 of accessible memory in a case when memory map is not available.
2057 The above restrictions are fine for this case, but will give
2058 incorrect results if the memory is 'patchy'. However, supporting
2059 'patchy' memory would require trying to read every single byte,
2060 and it seems unacceptable solution. Explicit memory map is
2061 recommended for this case -- and target_read_memory_robust will
2062 take care of reading multiple ranges then. */
2065 read_whatever_is_readable (struct target_ops
*ops
,
2066 const ULONGEST begin
, const ULONGEST end
,
2068 std::vector
<memory_read_result
> *result
)
2070 ULONGEST current_begin
= begin
;
2071 ULONGEST current_end
= end
;
2073 ULONGEST xfered_len
;
2075 /* If we previously failed to read 1 byte, nothing can be done here. */
2076 if (end
- begin
<= 1)
2079 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2081 /* Check that either first or the last byte is readable, and give up
2082 if not. This heuristic is meant to permit reading accessible memory
2083 at the boundary of accessible region. */
2084 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2085 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2090 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2091 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2092 &xfered_len
) == TARGET_XFER_OK
)
2100 /* Loop invariant is that the [current_begin, current_end) was previously
2101 found to be not readable as a whole.
2103 Note loop condition -- if the range has 1 byte, we can't divide the range
2104 so there's no point trying further. */
2105 while (current_end
- current_begin
> 1)
2107 ULONGEST first_half_begin
, first_half_end
;
2108 ULONGEST second_half_begin
, second_half_end
;
2110 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2114 first_half_begin
= current_begin
;
2115 first_half_end
= middle
;
2116 second_half_begin
= middle
;
2117 second_half_end
= current_end
;
2121 first_half_begin
= middle
;
2122 first_half_end
= current_end
;
2123 second_half_begin
= current_begin
;
2124 second_half_end
= middle
;
2127 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2128 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2130 first_half_end
- first_half_begin
);
2132 if (xfer
== first_half_end
- first_half_begin
)
2134 /* This half reads up fine. So, the error must be in the
2136 current_begin
= second_half_begin
;
2137 current_end
= second_half_end
;
2141 /* This half is not readable. Because we've tried one byte, we
2142 know some part of this half if actually readable. Go to the next
2143 iteration to divide again and try to read.
2145 We don't handle the other half, because this function only tries
2146 to read a single readable subrange. */
2147 current_begin
= first_half_begin
;
2148 current_end
= first_half_end
;
2154 /* The [begin, current_begin) range has been read. */
2155 result
->emplace_back (begin
, current_end
, std::move (buf
));
2159 /* The [current_end, end) range has been read. */
2160 LONGEST region_len
= end
- current_end
;
2162 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2163 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2164 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2165 region_len
* unit_size
);
2166 result
->emplace_back (current_end
, end
, std::move (data
));
2170 std::vector
<memory_read_result
>
2171 read_memory_robust (struct target_ops
*ops
,
2172 const ULONGEST offset
, const LONGEST len
)
2174 std::vector
<memory_read_result
> result
;
2175 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2177 LONGEST xfered_total
= 0;
2178 while (xfered_total
< len
)
2180 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2183 /* If there is no explicit region, a fake one should be created. */
2184 gdb_assert (region
);
2186 if (region
->hi
== 0)
2187 region_len
= len
- xfered_total
;
2189 region_len
= region
->hi
- offset
;
2191 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2193 /* Cannot read this region. Note that we can end up here only
2194 if the region is explicitly marked inaccessible, or
2195 'inaccessible-by-default' is in effect. */
2196 xfered_total
+= region_len
;
2200 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2201 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2202 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2204 LONGEST xfered_partial
=
2205 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2206 offset
+ xfered_total
, to_read
);
2207 /* Call an observer, notifying them of the xfer progress? */
2208 if (xfered_partial
<= 0)
2210 /* Got an error reading full chunk. See if maybe we can read
2212 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2213 offset
+ xfered_total
+ to_read
,
2214 unit_size
, &result
);
2215 xfered_total
+= to_read
;
2219 result
.emplace_back (offset
+ xfered_total
,
2220 offset
+ xfered_total
+ xfered_partial
,
2221 std::move (buffer
));
2222 xfered_total
+= xfered_partial
;
2232 /* An alternative to target_write with progress callbacks. */
2235 target_write_with_progress (struct target_ops
*ops
,
2236 enum target_object object
,
2237 const char *annex
, const gdb_byte
*buf
,
2238 ULONGEST offset
, LONGEST len
,
2239 void (*progress
) (ULONGEST
, void *), void *baton
)
2241 LONGEST xfered_total
= 0;
2244 /* If we are writing to a memory object, find the length of an addressable
2245 unit for that architecture. */
2246 if (object
== TARGET_OBJECT_MEMORY
2247 || object
== TARGET_OBJECT_STACK_MEMORY
2248 || object
== TARGET_OBJECT_CODE_MEMORY
2249 || object
== TARGET_OBJECT_RAW_MEMORY
)
2250 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2252 /* Give the progress callback a chance to set up. */
2254 (*progress
) (0, baton
);
2256 while (xfered_total
< len
)
2258 ULONGEST xfered_partial
;
2259 enum target_xfer_status status
;
2261 status
= target_write_partial (ops
, object
, annex
,
2262 buf
+ xfered_total
* unit_size
,
2263 offset
+ xfered_total
, len
- xfered_total
,
2266 if (status
!= TARGET_XFER_OK
)
2267 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2270 (*progress
) (xfered_partial
, baton
);
2272 xfered_total
+= xfered_partial
;
2278 /* For docs on target_write see target.h. */
2281 target_write (struct target_ops
*ops
,
2282 enum target_object object
,
2283 const char *annex
, const gdb_byte
*buf
,
2284 ULONGEST offset
, LONGEST len
)
2286 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2290 /* Help for target_read_alloc and target_read_stralloc. See their comments
2293 template <typename T
>
2294 gdb::optional
<gdb::def_vector
<T
>>
2295 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2298 gdb::def_vector
<T
> buf
;
2300 const int chunk
= 4096;
2302 /* This function does not have a length parameter; it reads the
2303 entire OBJECT). Also, it doesn't support objects fetched partly
2304 from one target and partly from another (in a different stratum,
2305 e.g. a core file and an executable). Both reasons make it
2306 unsuitable for reading memory. */
2307 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2309 /* Start by reading up to 4K at a time. The target will throttle
2310 this number down if necessary. */
2313 ULONGEST xfered_len
;
2314 enum target_xfer_status status
;
2316 buf
.resize (buf_pos
+ chunk
);
2318 status
= target_read_partial (ops
, object
, annex
,
2319 (gdb_byte
*) &buf
[buf_pos
],
2323 if (status
== TARGET_XFER_EOF
)
2325 /* Read all there was. */
2326 buf
.resize (buf_pos
);
2329 else if (status
!= TARGET_XFER_OK
)
2331 /* An error occurred. */
2335 buf_pos
+= xfered_len
;
2343 gdb::optional
<gdb::byte_vector
>
2344 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2347 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2352 gdb::optional
<gdb::char_vector
>
2353 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2356 gdb::optional
<gdb::char_vector
> buf
2357 = target_read_alloc_1
<char> (ops
, object
, annex
);
2362 if (buf
->empty () || buf
->back () != '\0')
2363 buf
->push_back ('\0');
2365 /* Check for embedded NUL bytes; but allow trailing NULs. */
2366 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2367 it
!= buf
->end (); it
++)
2370 warning (_("target object %d, annex %s, "
2371 "contained unexpected null characters"),
2372 (int) object
, annex
? annex
: "(none)");
2379 /* Memory transfer methods. */
2382 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2385 /* This method is used to read from an alternate, non-current
2386 target. This read must bypass the overlay support (as symbols
2387 don't match this target), and GDB's internal cache (wrong cache
2388 for this target). */
2389 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2391 memory_error (TARGET_XFER_E_IO
, addr
);
2395 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2396 int len
, enum bfd_endian byte_order
)
2398 gdb_byte buf
[sizeof (ULONGEST
)];
2400 gdb_assert (len
<= sizeof (buf
));
2401 get_target_memory (ops
, addr
, buf
, len
);
2402 return extract_unsigned_integer (buf
, len
, byte_order
);
2408 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2409 struct bp_target_info
*bp_tgt
)
2411 if (!may_insert_breakpoints
)
2413 warning (_("May not insert breakpoints"));
2417 target_ops
*target
= current_inferior ()->top_target ();
2419 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2425 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2426 struct bp_target_info
*bp_tgt
,
2427 enum remove_bp_reason reason
)
2429 /* This is kind of a weird case to handle, but the permission might
2430 have been changed after breakpoints were inserted - in which case
2431 we should just take the user literally and assume that any
2432 breakpoints should be left in place. */
2433 if (!may_insert_breakpoints
)
2435 warning (_("May not remove breakpoints"));
2439 target_ops
*target
= current_inferior ()->top_target ();
2441 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2445 info_target_command (const char *args
, int from_tty
)
2447 int has_all_mem
= 0;
2449 if (current_program_space
->symfile_object_file
!= NULL
)
2451 objfile
*objf
= current_program_space
->symfile_object_file
;
2452 gdb_printf (_("Symbols from \"%s\".\n"),
2453 objfile_name (objf
));
2456 for (target_ops
*t
= current_inferior ()->top_target ();
2460 if (!t
->has_memory ())
2463 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2466 gdb_printf (_("\tWhile running this, "
2467 "GDB does not access memory from...\n"));
2468 gdb_printf ("%s:\n", t
->longname ());
2470 has_all_mem
= t
->has_all_memory ();
2474 /* This function is called before any new inferior is created, e.g.
2475 by running a program, attaching, or connecting to a target.
2476 It cleans up any state from previous invocations which might
2477 change between runs. This is a subset of what target_preopen
2478 resets (things which might change between targets). */
2481 target_pre_inferior (int from_tty
)
2483 /* Clear out solib state. Otherwise the solib state of the previous
2484 inferior might have survived and is entirely wrong for the new
2485 target. This has been observed on GNU/Linux using glibc 2.3. How
2497 Cannot access memory at address 0xdeadbeef
2500 /* In some OSs, the shared library list is the same/global/shared
2501 across inferiors. If code is shared between processes, so are
2502 memory regions and features. */
2503 if (!gdbarch_has_global_solist (target_gdbarch ()))
2505 no_shared_libraries (NULL
, from_tty
);
2507 invalidate_target_mem_regions ();
2509 target_clear_description ();
2512 /* attach_flag may be set if the previous process associated with
2513 the inferior was attached to. */
2514 current_inferior ()->attach_flag
= 0;
2516 current_inferior ()->highest_thread_num
= 0;
2518 agent_capability_invalidate ();
2521 /* This is to be called by the open routine before it does
2525 target_preopen (int from_tty
)
2529 if (current_inferior ()->pid
!= 0)
2532 || !target_has_execution ()
2533 || query (_("A program is being debugged already. Kill it? ")))
2535 /* Core inferiors actually should be detached, not
2537 if (target_has_execution ())
2540 target_detach (current_inferior (), 0);
2543 error (_("Program not killed."));
2546 /* Calling target_kill may remove the target from the stack. But if
2547 it doesn't (which seems like a win for UDI), remove it now. */
2548 /* Leave the exec target, though. The user may be switching from a
2549 live process to a core of the same program. */
2550 pop_all_targets_above (file_stratum
);
2552 target_pre_inferior (from_tty
);
2558 target_detach (inferior
*inf
, int from_tty
)
2560 /* After we have detached, we will clear the register cache for this inferior
2561 by calling registers_changed_ptid. We must save the pid_ptid before
2562 detaching, as the target detach method will clear inf->pid. */
2563 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2565 /* As long as some to_detach implementations rely on the current_inferior
2566 (either directly, or indirectly, like through target_gdbarch or by
2567 reading memory), INF needs to be the current inferior. When that
2568 requirement will become no longer true, then we can remove this
2570 gdb_assert (inf
== current_inferior ());
2572 prepare_for_detach ();
2574 /* Hold a strong reference because detaching may unpush the
2576 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2578 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2580 process_stratum_target
*proc_target
2581 = as_process_stratum_target (proc_target_ref
.get ());
2583 registers_changed_ptid (proc_target
, save_pid_ptid
);
2585 /* We have to ensure we have no frame cache left. Normally,
2586 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2587 inferior_ptid matches save_pid_ptid, but in our case, it does not
2588 call it, as inferior_ptid has been reset. */
2589 reinit_frame_cache ();
2593 target_disconnect (const char *args
, int from_tty
)
2595 /* If we're in breakpoints-always-inserted mode or if breakpoints
2596 are global across processes, we have to remove them before
2598 remove_breakpoints ();
2600 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2603 /* See target/target.h. */
2606 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2607 target_wait_flags options
)
2609 target_ops
*target
= current_inferior ()->top_target ();
2610 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2612 gdb_assert (!proc_target
->commit_resumed_state
);
2614 if (!target_can_async_p (target
))
2615 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2619 gdb::observers::target_pre_wait
.notify (ptid
);
2620 ptid_t event_ptid
= target
->wait (ptid
, status
, options
);
2621 gdb::observers::target_post_wait
.notify (event_ptid
);
2626 gdb::observers::target_post_wait
.notify (null_ptid
);
2634 default_target_wait (struct target_ops
*ops
,
2635 ptid_t ptid
, struct target_waitstatus
*status
,
2636 target_wait_flags options
)
2638 status
->set_ignore ();
2639 return minus_one_ptid
;
2643 target_pid_to_str (ptid_t ptid
)
2645 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2649 target_thread_name (struct thread_info
*info
)
2651 gdb_assert (info
->inf
== current_inferior ());
2653 return current_inferior ()->top_target ()->thread_name (info
);
2656 struct thread_info
*
2657 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2659 struct inferior
*inf
)
2661 target_ops
*target
= current_inferior ()->top_target ();
2663 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2669 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2671 target_ops
*target
= current_inferior ()->top_target ();
2673 return target
->thread_info_to_thread_handle (tip
);
2677 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2679 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2680 gdb_assert (!curr_target
->commit_resumed_state
);
2682 target_dcache_invalidate ();
2684 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2686 registers_changed_ptid (curr_target
, ptid
);
2687 /* We only set the internal executing state here. The user/frontend
2688 running state is set at a higher level. This also clears the
2689 thread's stop_pc as side effect. */
2690 set_executing (curr_target
, ptid
, true);
2691 clear_inline_frame_state (curr_target
, ptid
);
2693 if (target_can_async_p ())
2700 target_commit_resumed ()
2702 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2703 current_inferior ()->top_target ()->commit_resumed ();
2709 target_has_pending_events ()
2711 return current_inferior ()->top_target ()->has_pending_events ();
2715 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2717 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2721 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2723 current_inferior ()->top_target ()->program_signals (program_signals
);
2727 default_follow_fork (struct target_ops
*self
, inferior
*child_inf
,
2728 ptid_t child_ptid
, target_waitkind fork_kind
,
2729 bool follow_child
, bool detach_fork
)
2731 /* Some target returned a fork event, but did not know how to follow it. */
2732 internal_error (__FILE__
, __LINE__
,
2733 _("could not find a target to follow fork"));
2739 target_follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
2740 target_waitkind fork_kind
, bool follow_child
,
2743 target_ops
*target
= current_inferior ()->top_target ();
2745 /* Check consistency between CHILD_INF, CHILD_PTID, FOLLOW_CHILD and
2747 if (child_inf
!= nullptr)
2749 gdb_assert (follow_child
|| !detach_fork
);
2750 gdb_assert (child_inf
->pid
== child_ptid
.pid ());
2753 gdb_assert (!follow_child
&& detach_fork
);
2755 return target
->follow_fork (child_inf
, child_ptid
, fork_kind
, follow_child
,
2762 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2763 const char *execd_pathname
)
2765 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2770 default_mourn_inferior (struct target_ops
*self
)
2772 internal_error (__FILE__
, __LINE__
,
2773 _("could not find a target to follow mourn inferior"));
2777 target_mourn_inferior (ptid_t ptid
)
2779 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2780 current_inferior ()->top_target ()->mourn_inferior ();
2782 /* We no longer need to keep handles on any of the object files.
2783 Make sure to release them to avoid unnecessarily locking any
2784 of them while we're not actually debugging. */
2785 bfd_cache_close_all ();
2788 /* Look for a target which can describe architectural features, starting
2789 from TARGET. If we find one, return its description. */
2791 const struct target_desc
*
2792 target_read_description (struct target_ops
*target
)
2794 return target
->read_description ();
2798 /* Default implementation of memory-searching. */
2801 default_search_memory (struct target_ops
*self
,
2802 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2803 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2804 CORE_ADDR
*found_addrp
)
2806 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2808 return target_read (current_inferior ()->top_target (),
2809 TARGET_OBJECT_MEMORY
, NULL
,
2810 result
, addr
, len
) == len
;
2813 /* Start over from the top of the target stack. */
2814 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2815 pattern
, pattern_len
, found_addrp
);
2818 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2819 sequence of bytes in PATTERN with length PATTERN_LEN.
2821 The result is 1 if found, 0 if not found, and -1 if there was an error
2822 requiring halting of the search (e.g. memory read error).
2823 If the pattern is found the address is recorded in FOUND_ADDRP. */
2826 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2827 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2828 CORE_ADDR
*found_addrp
)
2830 target_ops
*target
= current_inferior ()->top_target ();
2832 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2833 pattern_len
, found_addrp
);
2836 /* Look through the currently pushed targets. If none of them will
2837 be able to restart the currently running process, issue an error
2841 target_require_runnable (void)
2843 for (target_ops
*t
= current_inferior ()->top_target ();
2847 /* If this target knows how to create a new program, then
2848 assume we will still be able to after killing the current
2849 one. Either killing and mourning will not pop T, or else
2850 find_default_run_target will find it again. */
2851 if (t
->can_create_inferior ())
2854 /* Do not worry about targets at certain strata that can not
2855 create inferiors. Assume they will be pushed again if
2856 necessary, and continue to the process_stratum. */
2857 if (t
->stratum () > process_stratum
)
2860 error (_("The \"%s\" target does not support \"run\". "
2861 "Try \"help target\" or \"continue\"."),
2865 /* This function is only called if the target is running. In that
2866 case there should have been a process_stratum target and it
2867 should either know how to create inferiors, or not... */
2868 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2871 /* Whether GDB is allowed to fall back to the default run target for
2872 "run", "attach", etc. when no target is connected yet. */
2873 static bool auto_connect_native_target
= true;
2876 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2877 struct cmd_list_element
*c
, const char *value
)
2880 _("Whether GDB may automatically connect to the "
2881 "native target is %s.\n"),
2885 /* A pointer to the target that can respond to "run" or "attach".
2886 Native targets are always singletons and instantiated early at GDB
2888 static target_ops
*the_native_target
;
2893 set_native_target (target_ops
*target
)
2895 if (the_native_target
!= NULL
)
2896 internal_error (__FILE__
, __LINE__
,
2897 _("native target already set (\"%s\")."),
2898 the_native_target
->longname ());
2900 the_native_target
= target
;
2906 get_native_target ()
2908 return the_native_target
;
2911 /* Look through the list of possible targets for a target that can
2912 execute a run or attach command without any other data. This is
2913 used to locate the default process stratum.
2915 If DO_MESG is not NULL, the result is always valid (error() is
2916 called for errors); else, return NULL on error. */
2918 static struct target_ops
*
2919 find_default_run_target (const char *do_mesg
)
2921 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2922 return the_native_target
;
2924 if (do_mesg
!= NULL
)
2925 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2932 find_attach_target (void)
2934 /* If a target on the current stack can attach, use it. */
2935 for (target_ops
*t
= current_inferior ()->top_target ();
2939 if (t
->can_attach ())
2943 /* Otherwise, use the default run target for attaching. */
2944 return find_default_run_target ("attach");
2950 find_run_target (void)
2952 /* If a target on the current stack can run, use it. */
2953 for (target_ops
*t
= current_inferior ()->top_target ();
2957 if (t
->can_create_inferior ())
2961 /* Otherwise, use the default run target. */
2962 return find_default_run_target ("run");
2966 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2971 /* Implement the "info proc" command. */
2974 target_info_proc (const char *args
, enum info_proc_what what
)
2976 struct target_ops
*t
;
2978 /* If we're already connected to something that can get us OS
2979 related data, use it. Otherwise, try using the native
2981 t
= find_target_at (process_stratum
);
2983 t
= find_default_run_target (NULL
);
2985 for (; t
!= NULL
; t
= t
->beneath ())
2987 if (t
->info_proc (args
, what
))
2990 gdb_printf (gdb_stdlog
,
2991 "target_info_proc (\"%s\", %d)\n", args
, what
);
3001 find_default_supports_disable_randomization (struct target_ops
*self
)
3003 struct target_ops
*t
;
3005 t
= find_default_run_target (NULL
);
3007 return t
->supports_disable_randomization ();
3012 target_supports_disable_randomization (void)
3014 return current_inferior ()->top_target ()->supports_disable_randomization ();
3017 /* See target/target.h. */
3020 target_supports_multi_process (void)
3022 return current_inferior ()->top_target ()->supports_multi_process ();
3027 gdb::optional
<gdb::char_vector
>
3028 target_get_osdata (const char *type
)
3030 struct target_ops
*t
;
3032 /* If we're already connected to something that can get us OS
3033 related data, use it. Otherwise, try using the native
3035 t
= find_target_at (process_stratum
);
3037 t
= find_default_run_target ("get OS data");
3042 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3045 /* Determine the current address space of thread PTID. */
3047 struct address_space
*
3048 target_thread_address_space (ptid_t ptid
)
3050 struct address_space
*aspace
;
3052 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3053 gdb_assert (aspace
!= NULL
);
3061 target_ops::beneath () const
3063 return current_inferior ()->find_target_beneath (this);
3067 target_ops::close ()
3072 target_ops::can_attach ()
3078 target_ops::attach (const char *, int)
3080 gdb_assert_not_reached ("target_ops::attach called");
3084 target_ops::can_create_inferior ()
3090 target_ops::create_inferior (const char *, const std::string
&,
3093 gdb_assert_not_reached ("target_ops::create_inferior called");
3097 target_ops::can_run ()
3105 for (target_ops
*t
= current_inferior ()->top_target ();
3116 /* Target file operations. */
3118 static struct target_ops
*
3119 default_fileio_target (void)
3121 struct target_ops
*t
;
3123 /* If we're already connected to something that can perform
3124 file I/O, use it. Otherwise, try using the native target. */
3125 t
= find_target_at (process_stratum
);
3128 return find_default_run_target ("file I/O");
3131 /* File handle for target file operations. */
3135 /* The target on which this file is open. NULL if the target is
3136 meanwhile closed while the handle is open. */
3139 /* The file descriptor on the target. */
3142 /* Check whether this fileio_fh_t represents a closed file. */
3145 return target_fd
< 0;
3149 /* Vector of currently open file handles. The value returned by
3150 target_fileio_open and passed as the FD argument to other
3151 target_fileio_* functions is an index into this vector. This
3152 vector's entries are never freed; instead, files are marked as
3153 closed, and the handle becomes available for reuse. */
3154 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3156 /* Index into fileio_fhandles of the lowest handle that might be
3157 closed. This permits handle reuse without searching the whole
3158 list each time a new file is opened. */
3159 static int lowest_closed_fd
;
3164 fileio_handles_invalidate_target (target_ops
*targ
)
3166 for (fileio_fh_t
&fh
: fileio_fhandles
)
3167 if (fh
.target
== targ
)
3171 /* Acquire a target fileio file descriptor. */
3174 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3176 /* Search for closed handles to reuse. */
3177 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3179 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3181 if (fh
.is_closed ())
3185 /* Push a new handle if no closed handles were found. */
3186 if (lowest_closed_fd
== fileio_fhandles
.size ())
3187 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3189 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3191 /* Should no longer be marked closed. */
3192 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3194 /* Return its index, and start the next lookup at
3196 return lowest_closed_fd
++;
3199 /* Release a target fileio file descriptor. */
3202 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3205 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3208 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3210 static fileio_fh_t
*
3211 fileio_fd_to_fh (int fd
)
3213 return &fileio_fhandles
[fd
];
3217 /* Default implementations of file i/o methods. We don't want these
3218 to delegate automatically, because we need to know which target
3219 supported the method, in order to call it directly from within
3220 pread/pwrite, etc. */
3223 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3224 int flags
, int mode
, int warn_if_slow
,
3227 *target_errno
= FILEIO_ENOSYS
;
3232 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3233 ULONGEST offset
, int *target_errno
)
3235 *target_errno
= FILEIO_ENOSYS
;
3240 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3241 ULONGEST offset
, int *target_errno
)
3243 *target_errno
= FILEIO_ENOSYS
;
3248 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3250 *target_errno
= FILEIO_ENOSYS
;
3255 target_ops::fileio_close (int fd
, int *target_errno
)
3257 *target_errno
= FILEIO_ENOSYS
;
3262 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3265 *target_errno
= FILEIO_ENOSYS
;
3269 gdb::optional
<std::string
>
3270 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3273 *target_errno
= FILEIO_ENOSYS
;
3280 target_fileio_open (struct inferior
*inf
, const char *filename
,
3281 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3283 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3285 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3286 warn_if_slow
, target_errno
);
3288 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3294 fd
= acquire_fileio_fd (t
, fd
);
3297 gdb_printf (gdb_stdlog
,
3298 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3300 inf
== NULL
? 0 : inf
->num
,
3301 filename
, flags
, mode
,
3303 fd
!= -1 ? 0 : *target_errno
);
3307 *target_errno
= FILEIO_ENOSYS
;
3314 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3315 ULONGEST offset
, int *target_errno
)
3317 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3320 if (fh
->is_closed ())
3321 *target_errno
= EBADF
;
3322 else if (fh
->target
== NULL
)
3323 *target_errno
= EIO
;
3325 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3326 len
, offset
, target_errno
);
3329 gdb_printf (gdb_stdlog
,
3330 "target_fileio_pwrite (%d,...,%d,%s) "
3332 fd
, len
, pulongest (offset
),
3333 ret
, ret
!= -1 ? 0 : *target_errno
);
3340 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3341 ULONGEST offset
, int *target_errno
)
3343 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3346 if (fh
->is_closed ())
3347 *target_errno
= EBADF
;
3348 else if (fh
->target
== NULL
)
3349 *target_errno
= EIO
;
3351 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3352 len
, offset
, target_errno
);
3355 gdb_printf (gdb_stdlog
,
3356 "target_fileio_pread (%d,...,%d,%s) "
3358 fd
, len
, pulongest (offset
),
3359 ret
, ret
!= -1 ? 0 : *target_errno
);
3366 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3368 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3371 if (fh
->is_closed ())
3372 *target_errno
= EBADF
;
3373 else if (fh
->target
== NULL
)
3374 *target_errno
= EIO
;
3376 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3379 gdb_printf (gdb_stdlog
,
3380 "target_fileio_fstat (%d) = %d (%d)\n",
3381 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3388 target_fileio_close (int fd
, int *target_errno
)
3390 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3393 if (fh
->is_closed ())
3394 *target_errno
= EBADF
;
3397 if (fh
->target
!= NULL
)
3398 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3402 release_fileio_fd (fd
, fh
);
3406 gdb_printf (gdb_stdlog
,
3407 "target_fileio_close (%d) = %d (%d)\n",
3408 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3415 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3418 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3420 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3422 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3426 gdb_printf (gdb_stdlog
,
3427 "target_fileio_unlink (%d,%s)"
3429 inf
== NULL
? 0 : inf
->num
, filename
,
3430 ret
, ret
!= -1 ? 0 : *target_errno
);
3434 *target_errno
= FILEIO_ENOSYS
;
3440 gdb::optional
<std::string
>
3441 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3444 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3446 gdb::optional
<std::string
> ret
3447 = t
->fileio_readlink (inf
, filename
, target_errno
);
3449 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3453 gdb_printf (gdb_stdlog
,
3454 "target_fileio_readlink (%d,%s)"
3456 inf
== NULL
? 0 : inf
->num
,
3457 filename
, ret
? ret
->c_str () : "(nil)",
3458 ret
? 0 : *target_errno
);
3462 *target_errno
= FILEIO_ENOSYS
;
3466 /* Like scoped_fd, but specific to target fileio. */
3468 class scoped_target_fd
3471 explicit scoped_target_fd (int fd
) noexcept
3476 ~scoped_target_fd ()
3482 target_fileio_close (m_fd
, &target_errno
);
3486 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3488 int get () const noexcept
3497 /* Read target file FILENAME, in the filesystem as seen by INF. If
3498 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3499 remote targets, the remote stub). Store the result in *BUF_P and
3500 return the size of the transferred data. PADDING additional bytes
3501 are available in *BUF_P. This is a helper function for
3502 target_fileio_read_alloc; see the declaration of that function for
3503 more information. */
3506 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3507 gdb_byte
**buf_p
, int padding
)
3509 size_t buf_alloc
, buf_pos
;
3514 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3515 0700, false, &target_errno
));
3516 if (fd
.get () == -1)
3519 /* Start by reading up to 4K at a time. The target will throttle
3520 this number down if necessary. */
3522 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3526 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3527 buf_alloc
- buf_pos
- padding
, buf_pos
,
3531 /* An error occurred. */
3537 /* Read all there was. */
3547 /* If the buffer is filling up, expand it. */
3548 if (buf_alloc
< buf_pos
* 2)
3551 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3561 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3564 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3569 gdb::unique_xmalloc_ptr
<char>
3570 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3574 LONGEST i
, transferred
;
3576 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3577 bufstr
= (char *) buffer
;
3579 if (transferred
< 0)
3580 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3582 if (transferred
== 0)
3583 return make_unique_xstrdup ("");
3585 bufstr
[transferred
] = 0;
3587 /* Check for embedded NUL bytes; but allow trailing NULs. */
3588 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3591 warning (_("target file %s "
3592 "contained unexpected null characters"),
3597 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3602 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3603 CORE_ADDR addr
, int len
)
3605 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3609 default_watchpoint_addr_within_range (struct target_ops
*target
,
3611 CORE_ADDR start
, int length
)
3613 return addr
>= start
&& addr
< start
+ length
;
3619 target_stack::find_beneath (const target_ops
*t
) const
3621 /* Look for a non-empty slot at stratum levels beneath T's. */
3622 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3623 if (m_stack
[stratum
] != NULL
)
3624 return m_stack
[stratum
];
3632 find_target_at (enum strata stratum
)
3634 return current_inferior ()->target_at (stratum
);
3642 target_announce_detach (int from_tty
)
3645 const char *exec_file
;
3650 pid
= inferior_ptid
.pid ();
3651 exec_file
= get_exec_file (0);
3652 if (exec_file
== nullptr)
3653 gdb_printf ("Detaching from pid %s\n",
3654 target_pid_to_str (ptid_t (pid
)).c_str ());
3656 gdb_printf (_("Detaching from program: %s, %s\n"), exec_file
,
3657 target_pid_to_str (ptid_t (pid
)).c_str ());
3663 target_announce_attach (int from_tty
, int pid
)
3668 const char *exec_file
= get_exec_file (0);
3670 if (exec_file
!= nullptr)
3671 gdb_printf ("Attaching to program: %s, %s\n", exec_file
,
3672 target_pid_to_str (ptid_t (pid
)).c_str ());
3674 gdb_printf ("Attaching to %s\n",
3675 target_pid_to_str (ptid_t (pid
)).c_str ());
3678 /* The inferior process has died. Long live the inferior! */
3681 generic_mourn_inferior (void)
3683 inferior
*inf
= current_inferior ();
3685 switch_to_no_thread ();
3687 /* Mark breakpoints uninserted in case something tries to delete a
3688 breakpoint while we delete the inferior's threads (which would
3689 fail, since the inferior is long gone). */
3690 mark_breakpoints_out ();
3693 exit_inferior (inf
);
3695 /* Note this wipes step-resume breakpoints, so needs to be done
3696 after exit_inferior, which ends up referencing the step-resume
3697 breakpoints through clear_thread_inferior_resources. */
3698 breakpoint_init_inferior (inf_exited
);
3700 registers_changed ();
3702 reopen_exec_file ();
3703 reinit_frame_cache ();
3705 if (deprecated_detach_hook
)
3706 deprecated_detach_hook ();
3709 /* Convert a normal process ID to a string. Returns the string in a
3713 normal_pid_to_str (ptid_t ptid
)
3715 return string_printf ("process %d", ptid
.pid ());
3719 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3721 return normal_pid_to_str (ptid
);
3724 /* Error-catcher for target_find_memory_regions. */
3726 dummy_find_memory_regions (struct target_ops
*self
,
3727 find_memory_region_ftype ignore1
, void *ignore2
)
3729 error (_("Command not implemented for this target."));
3733 /* Error-catcher for target_make_corefile_notes. */
3734 static gdb::unique_xmalloc_ptr
<char>
3735 dummy_make_corefile_notes (struct target_ops
*self
,
3736 bfd
*ignore1
, int *ignore2
)
3738 error (_("Command not implemented for this target."));
3742 #include "target-delegates.c"
3744 /* The initial current target, so that there is always a semi-valid
3747 static dummy_target the_dummy_target
;
3754 return &the_dummy_target
;
3757 static const target_info dummy_target_info
= {
3764 dummy_target::stratum () const
3766 return dummy_stratum
;
3770 debug_target::stratum () const
3772 return debug_stratum
;
3776 dummy_target::info () const
3778 return dummy_target_info
;
3782 debug_target::info () const
3784 return beneath ()->info ();
3790 target_close (struct target_ops
*targ
)
3792 for (inferior
*inf
: all_inferiors ())
3793 gdb_assert (!inf
->target_is_pushed (targ
));
3795 fileio_handles_invalidate_target (targ
);
3800 gdb_printf (gdb_stdlog
, "target_close ()\n");
3804 target_thread_alive (ptid_t ptid
)
3806 return current_inferior ()->top_target ()->thread_alive (ptid
);
3810 target_update_thread_list (void)
3812 current_inferior ()->top_target ()->update_thread_list ();
3816 target_stop (ptid_t ptid
)
3818 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3820 gdb_assert (!proc_target
->commit_resumed_state
);
3824 warning (_("May not interrupt or stop the target, ignoring attempt"));
3828 current_inferior ()->top_target ()->stop (ptid
);
3836 warning (_("May not interrupt or stop the target, ignoring attempt"));
3840 current_inferior ()->top_target ()->interrupt ();
3846 target_pass_ctrlc (void)
3848 /* Pass the Ctrl-C to the first target that has a thread
3850 for (inferior
*inf
: all_inferiors ())
3852 target_ops
*proc_target
= inf
->process_target ();
3853 if (proc_target
== NULL
)
3856 for (thread_info
*thr
: inf
->non_exited_threads ())
3858 /* A thread can be THREAD_STOPPED and executing, while
3859 running an infcall. */
3860 if (thr
->state
== THREAD_RUNNING
|| thr
->executing ())
3862 /* We can get here quite deep in target layers. Avoid
3863 switching thread context or anything that would
3864 communicate with the target (e.g., to fetch
3865 registers), or flushing e.g., the frame cache. We
3866 just switch inferior in order to be able to call
3867 through the target_stack. */
3868 scoped_restore_current_inferior restore_inferior
;
3869 set_current_inferior (inf
);
3870 current_inferior ()->top_target ()->pass_ctrlc ();
3880 default_target_pass_ctrlc (struct target_ops
*ops
)
3882 target_interrupt ();
3885 /* See target/target.h. */
3888 target_stop_and_wait (ptid_t ptid
)
3890 struct target_waitstatus status
;
3891 bool was_non_stop
= non_stop
;
3896 target_wait (ptid
, &status
, 0);
3898 non_stop
= was_non_stop
;
3901 /* See target/target.h. */
3904 target_continue_no_signal (ptid_t ptid
)
3906 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3909 /* See target/target.h. */
3912 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3914 target_resume (ptid
, 0, signal
);
3917 /* Concatenate ELEM to LIST, a comma-separated list. */
3920 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3922 if (!list
->empty ())
3923 list
->append (", ");
3925 list
->append (elem
);
3928 /* Helper for target_options_to_string. If OPT is present in
3929 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3930 OPT is removed from TARGET_OPTIONS. */
3933 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3934 target_wait_flag opt
, const char *opt_str
)
3936 if ((*target_options
& opt
) != 0)
3938 str_comma_list_concat_elem (ret
, opt_str
);
3939 *target_options
&= ~opt
;
3946 target_options_to_string (target_wait_flags target_options
)
3950 #define DO_TARG_OPTION(OPT) \
3951 do_option (&target_options, &ret, OPT, #OPT)
3953 DO_TARG_OPTION (TARGET_WNOHANG
);
3955 if (target_options
!= 0)
3956 str_comma_list_concat_elem (&ret
, "unknown???");
3962 target_fetch_registers (struct regcache
*regcache
, int regno
)
3964 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3966 regcache
->debug_print_register ("target_fetch_registers", regno
);
3970 target_store_registers (struct regcache
*regcache
, int regno
)
3972 if (!may_write_registers
)
3973 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3975 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3978 regcache
->debug_print_register ("target_store_registers", regno
);
3983 target_core_of_thread (ptid_t ptid
)
3985 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3989 simple_verify_memory (struct target_ops
*ops
,
3990 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3992 LONGEST total_xfered
= 0;
3994 while (total_xfered
< size
)
3996 ULONGEST xfered_len
;
3997 enum target_xfer_status status
;
3999 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
4001 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
4002 buf
, NULL
, lma
+ total_xfered
, howmuch
,
4004 if (status
== TARGET_XFER_OK
4005 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
4007 total_xfered
+= xfered_len
;
4016 /* Default implementation of memory verification. */
4019 default_verify_memory (struct target_ops
*self
,
4020 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4022 /* Start over from the top of the target stack. */
4023 return simple_verify_memory (current_inferior ()->top_target (),
4024 data
, memaddr
, size
);
4028 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4030 target_ops
*target
= current_inferior ()->top_target ();
4032 return target
->verify_memory (data
, memaddr
, size
);
4035 /* The documentation for this function is in its prototype declaration in
4039 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4040 enum target_hw_bp_type rw
)
4042 target_ops
*target
= current_inferior ()->top_target ();
4044 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
4047 /* The documentation for this function is in its prototype declaration in
4051 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4052 enum target_hw_bp_type rw
)
4054 target_ops
*target
= current_inferior ()->top_target ();
4056 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4059 /* The documentation for this function is in its prototype declaration
4063 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4065 target_ops
*target
= current_inferior ()->top_target ();
4067 return target
->masked_watch_num_registers (addr
, mask
);
4070 /* The documentation for this function is in its prototype declaration
4074 target_ranged_break_num_registers (void)
4076 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4081 struct btrace_target_info
*
4082 target_enable_btrace (thread_info
*tp
, const struct btrace_config
*conf
)
4084 return current_inferior ()->top_target ()->enable_btrace (tp
, conf
);
4090 target_disable_btrace (struct btrace_target_info
*btinfo
)
4092 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4098 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4100 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4106 target_read_btrace (struct btrace_data
*btrace
,
4107 struct btrace_target_info
*btinfo
,
4108 enum btrace_read_type type
)
4110 target_ops
*target
= current_inferior ()->top_target ();
4112 return target
->read_btrace (btrace
, btinfo
, type
);
4117 const struct btrace_config
*
4118 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4120 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4126 target_stop_recording (void)
4128 current_inferior ()->top_target ()->stop_recording ();
4134 target_save_record (const char *filename
)
4136 current_inferior ()->top_target ()->save_record (filename
);
4142 target_supports_delete_record ()
4144 return current_inferior ()->top_target ()->supports_delete_record ();
4150 target_delete_record (void)
4152 current_inferior ()->top_target ()->delete_record ();
4158 target_record_method (ptid_t ptid
)
4160 return current_inferior ()->top_target ()->record_method (ptid
);
4166 target_record_is_replaying (ptid_t ptid
)
4168 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4174 target_record_will_replay (ptid_t ptid
, int dir
)
4176 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4182 target_record_stop_replaying (void)
4184 current_inferior ()->top_target ()->record_stop_replaying ();
4190 target_goto_record_begin (void)
4192 current_inferior ()->top_target ()->goto_record_begin ();
4198 target_goto_record_end (void)
4200 current_inferior ()->top_target ()->goto_record_end ();
4206 target_goto_record (ULONGEST insn
)
4208 current_inferior ()->top_target ()->goto_record (insn
);
4214 target_insn_history (int size
, gdb_disassembly_flags flags
)
4216 current_inferior ()->top_target ()->insn_history (size
, flags
);
4222 target_insn_history_from (ULONGEST from
, int size
,
4223 gdb_disassembly_flags flags
)
4225 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4231 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4232 gdb_disassembly_flags flags
)
4234 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4240 target_call_history (int size
, record_print_flags flags
)
4242 current_inferior ()->top_target ()->call_history (size
, flags
);
4248 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4250 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4256 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4258 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4263 const struct frame_unwind
*
4264 target_get_unwinder (void)
4266 return current_inferior ()->top_target ()->get_unwinder ();
4271 const struct frame_unwind
*
4272 target_get_tailcall_unwinder (void)
4274 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4280 target_prepare_to_generate_core (void)
4282 current_inferior ()->top_target ()->prepare_to_generate_core ();
4288 target_done_generating_core (void)
4290 current_inferior ()->top_target ()->done_generating_core ();
4295 static char targ_desc
[] =
4296 "Names of targets and files being debugged.\nShows the entire \
4297 stack of targets currently in use (including the exec-file,\n\
4298 core-file, and process, if any), as well as the symbol file name.";
4301 default_rcmd (struct target_ops
*self
, const char *command
,
4302 struct ui_file
*output
)
4304 error (_("\"monitor\" command not supported by this target."));
4308 do_monitor_command (const char *cmd
, int from_tty
)
4310 target_rcmd (cmd
, gdb_stdtarg
);
4313 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4317 flash_erase_command (const char *cmd
, int from_tty
)
4319 /* Used to communicate termination of flash operations to the target. */
4320 bool found_flash_region
= false;
4321 struct gdbarch
*gdbarch
= target_gdbarch ();
4323 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4325 /* Iterate over all memory regions. */
4326 for (const mem_region
&m
: mem_regions
)
4328 /* Is this a flash memory region? */
4329 if (m
.attrib
.mode
== MEM_FLASH
)
4331 found_flash_region
= true;
4332 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4334 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4336 current_uiout
->message (_("Erasing flash memory region at address "));
4337 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4338 current_uiout
->message (", size = ");
4339 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4340 current_uiout
->message ("\n");
4344 /* Did we do any flash operations? If so, we need to finalize them. */
4345 if (found_flash_region
)
4346 target_flash_done ();
4348 current_uiout
->message (_("No flash memory regions found.\n"));
4351 /* Print the name of each layers of our target stack. */
4354 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4356 gdb_printf (_("The current target stack is:\n"));
4358 for (target_ops
*t
= current_inferior ()->top_target ();
4362 if (t
->stratum () == debug_stratum
)
4364 gdb_printf (" - %s (%s)\n", t
->shortname (), t
->longname ());
4371 target_async (int enable
)
4373 /* If we are trying to enable async mode then it must be the case that
4374 async mode is possible for this target. */
4375 gdb_assert (!enable
|| target_can_async_p ());
4376 infrun_async (enable
);
4377 current_inferior ()->top_target ()->async (enable
);
4383 target_thread_events (int enable
)
4385 current_inferior ()->top_target ()->thread_events (enable
);
4388 /* Controls if targets can report that they can/are async. This is
4389 just for maintainers to use when debugging gdb. */
4390 bool target_async_permitted
= true;
4393 set_maint_target_async (bool permitted
)
4395 if (have_live_inferiors ())
4396 error (_("Cannot change this setting while the inferior is running."));
4398 target_async_permitted
= permitted
;
4402 get_maint_target_async ()
4404 return target_async_permitted
;
4408 show_maint_target_async (ui_file
*file
, int from_tty
,
4409 cmd_list_element
*c
, const char *value
)
4412 _("Controlling the inferior in "
4413 "asynchronous mode is %s.\n"), value
);
4416 /* Return true if the target operates in non-stop mode even with "set
4420 target_always_non_stop_p (void)
4422 return current_inferior ()->top_target ()->always_non_stop_p ();
4428 target_is_non_stop_p ()
4431 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4432 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4433 && target_always_non_stop_p ()))
4434 && target_can_async_p ());
4440 exists_non_stop_target ()
4442 if (target_is_non_stop_p ())
4445 scoped_restore_current_thread restore_thread
;
4447 for (inferior
*inf
: all_inferiors ())
4449 switch_to_inferior_no_thread (inf
);
4450 if (target_is_non_stop_p ())
4457 /* Controls if targets can report that they always run in non-stop
4458 mode. This is just for maintainers to use when debugging gdb. */
4459 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4461 /* Set callback for maint target-non-stop setting. */
4464 set_maint_target_non_stop (auto_boolean enabled
)
4466 if (have_live_inferiors ())
4467 error (_("Cannot change this setting while the inferior is running."));
4469 target_non_stop_enabled
= enabled
;
4472 /* Get callback for maint target-non-stop setting. */
4475 get_maint_target_non_stop ()
4477 return target_non_stop_enabled
;
4481 show_maint_target_non_stop (ui_file
*file
, int from_tty
,
4482 cmd_list_element
*c
, const char *value
)
4484 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4486 _("Whether the target is always in non-stop mode "
4487 "is %s (currently %s).\n"), value
,
4488 target_always_non_stop_p () ? "on" : "off");
4491 _("Whether the target is always in non-stop mode "
4492 "is %s.\n"), value
);
4495 /* Temporary copies of permission settings. */
4497 static bool may_write_registers_1
= true;
4498 static bool may_write_memory_1
= true;
4499 static bool may_insert_breakpoints_1
= true;
4500 static bool may_insert_tracepoints_1
= true;
4501 static bool may_insert_fast_tracepoints_1
= true;
4502 static bool may_stop_1
= true;
4504 /* Make the user-set values match the real values again. */
4507 update_target_permissions (void)
4509 may_write_registers_1
= may_write_registers
;
4510 may_write_memory_1
= may_write_memory
;
4511 may_insert_breakpoints_1
= may_insert_breakpoints
;
4512 may_insert_tracepoints_1
= may_insert_tracepoints
;
4513 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4514 may_stop_1
= may_stop
;
4517 /* The one function handles (most of) the permission flags in the same
4521 set_target_permissions (const char *args
, int from_tty
,
4522 struct cmd_list_element
*c
)
4524 if (target_has_execution ())
4526 update_target_permissions ();
4527 error (_("Cannot change this setting while the inferior is running."));
4530 /* Make the real values match the user-changed values. */
4531 may_write_registers
= may_write_registers_1
;
4532 may_insert_breakpoints
= may_insert_breakpoints_1
;
4533 may_insert_tracepoints
= may_insert_tracepoints_1
;
4534 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4535 may_stop
= may_stop_1
;
4536 update_observer_mode ();
4539 /* Set memory write permission independently of observer mode. */
4542 set_write_memory_permission (const char *args
, int from_tty
,
4543 struct cmd_list_element
*c
)
4545 /* Make the real values match the user-changed values. */
4546 may_write_memory
= may_write_memory_1
;
4547 update_observer_mode ();
4550 void _initialize_target ();
4553 _initialize_target ()
4555 the_debug_target
= new debug_target ();
4557 add_info ("target", info_target_command
, targ_desc
);
4558 add_info ("files", info_target_command
, targ_desc
);
4560 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4561 Set target debugging."), _("\
4562 Show target debugging."), _("\
4563 When non-zero, target debugging is enabled. Higher numbers are more\n\
4567 &setdebuglist
, &showdebuglist
);
4569 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4570 &trust_readonly
, _("\
4571 Set mode for reading from readonly sections."), _("\
4572 Show mode for reading from readonly sections."), _("\
4573 When this mode is on, memory reads from readonly sections (such as .text)\n\
4574 will be read from the object file instead of from the target. This will\n\
4575 result in significant performance improvement for remote targets."),
4577 show_trust_readonly
,
4578 &setlist
, &showlist
);
4580 add_com ("monitor", class_obscure
, do_monitor_command
,
4581 _("Send a command to the remote monitor (remote targets only)."));
4583 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4584 _("Print the name of each layer of the internal target stack."),
4585 &maintenanceprintlist
);
4587 add_setshow_boolean_cmd ("target-async", no_class
,
4589 Set whether gdb controls the inferior in asynchronous mode."), _("\
4590 Show whether gdb controls the inferior in asynchronous mode."), _("\
4591 Tells gdb whether to control the inferior in asynchronous mode."),
4592 set_maint_target_async
,
4593 get_maint_target_async
,
4594 show_maint_target_async
,
4595 &maintenance_set_cmdlist
,
4596 &maintenance_show_cmdlist
);
4598 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4600 Set whether gdb always controls the inferior in non-stop mode."), _("\
4601 Show whether gdb always controls the inferior in non-stop mode."), _("\
4602 Tells gdb whether to control the inferior in non-stop mode."),
4603 set_maint_target_non_stop
,
4604 get_maint_target_non_stop
,
4605 show_maint_target_non_stop
,
4606 &maintenance_set_cmdlist
,
4607 &maintenance_show_cmdlist
);
4609 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4610 &may_write_registers_1
, _("\
4611 Set permission to write into registers."), _("\
4612 Show permission to write into registers."), _("\
4613 When this permission is on, GDB may write into the target's registers.\n\
4614 Otherwise, any sort of write attempt will result in an error."),
4615 set_target_permissions
, NULL
,
4616 &setlist
, &showlist
);
4618 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4619 &may_write_memory_1
, _("\
4620 Set permission to write into target memory."), _("\
4621 Show permission to write into target memory."), _("\
4622 When this permission is on, GDB may write into the target's memory.\n\
4623 Otherwise, any sort of write attempt will result in an error."),
4624 set_write_memory_permission
, NULL
,
4625 &setlist
, &showlist
);
4627 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4628 &may_insert_breakpoints_1
, _("\
4629 Set permission to insert breakpoints in the target."), _("\
4630 Show permission to insert breakpoints in the target."), _("\
4631 When this permission is on, GDB may insert breakpoints in the program.\n\
4632 Otherwise, any sort of insertion attempt will result in an error."),
4633 set_target_permissions
, NULL
,
4634 &setlist
, &showlist
);
4636 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4637 &may_insert_tracepoints_1
, _("\
4638 Set permission to insert tracepoints in the target."), _("\
4639 Show permission to insert tracepoints in the target."), _("\
4640 When this permission is on, GDB may insert tracepoints in the program.\n\
4641 Otherwise, any sort of insertion attempt will result in an error."),
4642 set_target_permissions
, NULL
,
4643 &setlist
, &showlist
);
4645 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4646 &may_insert_fast_tracepoints_1
, _("\
4647 Set permission to insert fast tracepoints in the target."), _("\
4648 Show permission to insert fast tracepoints in the target."), _("\
4649 When this permission is on, GDB may insert fast tracepoints.\n\
4650 Otherwise, any sort of insertion attempt will result in an error."),
4651 set_target_permissions
, NULL
,
4652 &setlist
, &showlist
);
4654 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4656 Set permission to interrupt or signal the target."), _("\
4657 Show permission to interrupt or signal the target."), _("\
4658 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4659 Otherwise, any attempt to interrupt or stop will be ignored."),
4660 set_target_permissions
, NULL
,
4661 &setlist
, &showlist
);
4663 add_com ("flash-erase", no_class
, flash_erase_command
,
4664 _("Erase all flash memory regions."));
4666 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4667 &auto_connect_native_target
, _("\
4668 Set whether GDB may automatically connect to the native target."), _("\
4669 Show whether GDB may automatically connect to the native target."), _("\
4670 When on, and GDB is not connected to a target yet, GDB\n\
4671 attempts \"run\" and other commands with the native target."),
4672 NULL
, show_auto_connect_native_target
,
4673 &setlist
, &showlist
);