1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2021 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
43 #include "gdbsupport/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "gdbsupport/byte-vector.h"
50 #include "gdbsupport/search.h"
52 #include <unordered_map>
53 #include "target-connection.h"
55 #include "cli/cli-decode.h"
57 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
59 static void default_terminal_info (struct target_ops
*, const char *, int);
61 static int default_watchpoint_addr_within_range (struct target_ops
*,
62 CORE_ADDR
, CORE_ADDR
, int);
64 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
67 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
69 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
72 static void default_mourn_inferior (struct target_ops
*self
);
74 static int default_search_memory (struct target_ops
*ops
,
76 ULONGEST search_space_len
,
77 const gdb_byte
*pattern
,
79 CORE_ADDR
*found_addrp
);
81 static int default_verify_memory (struct target_ops
*self
,
83 CORE_ADDR memaddr
, ULONGEST size
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static struct target_ops
*find_default_run_target (const char *);
89 static int dummy_find_memory_regions (struct target_ops
*self
,
90 find_memory_region_ftype ignore1
,
93 static gdb::unique_xmalloc_ptr
<char> dummy_make_corefile_notes
94 (struct target_ops
*self
, bfd
*ignore1
, int *ignore2
);
96 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
98 static enum exec_direction_kind default_execution_direction
99 (struct target_ops
*self
);
101 /* Mapping between target_info objects (which have address identity)
102 and corresponding open/factory function/callback. Each add_target
103 call adds one entry to this map, and registers a "target
104 TARGET_NAME" command that when invoked calls the factory registered
105 here. The target_info object is associated with the command via
106 the command's context. */
107 static std::unordered_map
<const target_info
*, target_open_ftype
*>
110 /* The singleton debug target. */
112 static struct target_ops
*the_debug_target
;
114 /* Command list for target. */
116 static struct cmd_list_element
*targetlist
= NULL
;
118 /* True if we should trust readonly sections from the
119 executable when reading memory. */
121 static bool trust_readonly
= false;
123 /* Nonzero if we should show true memory content including
124 memory breakpoint inserted by gdb. */
126 static int show_memory_breakpoints
= 0;
128 /* These globals control whether GDB attempts to perform these
129 operations; they are useful for targets that need to prevent
130 inadvertent disruption, such as in non-stop mode. */
132 bool may_write_registers
= true;
134 bool may_write_memory
= true;
136 bool may_insert_breakpoints
= true;
138 bool may_insert_tracepoints
= true;
140 bool may_insert_fast_tracepoints
= true;
142 bool may_stop
= true;
144 /* Non-zero if we want to see trace of target level stuff. */
146 static unsigned int targetdebug
= 0;
149 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
152 current_inferior ()->push_target (the_debug_target
);
154 current_inferior ()->unpush_target (the_debug_target
);
158 show_targetdebug (struct ui_file
*file
, int from_tty
,
159 struct cmd_list_element
*c
, const char *value
)
161 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
167 for (target_ops
*t
= current_inferior ()->top_target ();
170 if (t
->has_memory ())
179 for (target_ops
*t
= current_inferior ()->top_target ();
189 target_has_registers ()
191 for (target_ops
*t
= current_inferior ()->top_target ();
194 if (t
->has_registers ())
201 target_has_execution (inferior
*inf
)
204 inf
= current_inferior ();
206 for (target_ops
*t
= inf
->top_target ();
208 t
= inf
->find_target_beneath (t
))
209 if (t
->has_execution (inf
))
218 return current_inferior ()->top_target ()->shortname ();
224 target_attach_no_wait ()
226 return current_inferior ()->top_target ()->attach_no_wait ();
232 target_post_attach (int pid
)
234 return current_inferior ()->top_target ()->post_attach (pid
);
240 target_prepare_to_store (regcache
*regcache
)
242 return current_inferior ()->top_target ()->prepare_to_store (regcache
);
248 target_supports_enable_disable_tracepoint ()
250 target_ops
*target
= current_inferior ()->top_target ();
252 return target
->supports_enable_disable_tracepoint ();
256 target_supports_string_tracing ()
258 return current_inferior ()->top_target ()->supports_string_tracing ();
264 target_supports_evaluation_of_breakpoint_conditions ()
266 target_ops
*target
= current_inferior ()->top_target ();
268 return target
->supports_evaluation_of_breakpoint_conditions ();
274 target_supports_dumpcore ()
276 return current_inferior ()->top_target ()->supports_dumpcore ();
282 target_dumpcore (const char *filename
)
284 return current_inferior ()->top_target ()->dumpcore (filename
);
290 target_can_run_breakpoint_commands ()
292 return current_inferior ()->top_target ()->can_run_breakpoint_commands ();
300 return current_inferior ()->top_target ()->files_info ();
306 target_post_startup_inferior (ptid_t ptid
)
308 return current_inferior ()->top_target ()->post_startup_inferior (ptid
);
314 target_insert_fork_catchpoint (int pid
)
316 return current_inferior ()->top_target ()->insert_fork_catchpoint (pid
);
322 target_remove_fork_catchpoint (int pid
)
324 return current_inferior ()->top_target ()->remove_fork_catchpoint (pid
);
330 target_insert_vfork_catchpoint (int pid
)
332 return current_inferior ()->top_target ()->insert_vfork_catchpoint (pid
);
338 target_remove_vfork_catchpoint (int pid
)
340 return current_inferior ()->top_target ()->remove_vfork_catchpoint (pid
);
346 target_insert_exec_catchpoint (int pid
)
348 return current_inferior ()->top_target ()->insert_exec_catchpoint (pid
);
354 target_remove_exec_catchpoint (int pid
)
356 return current_inferior ()->top_target ()->remove_exec_catchpoint (pid
);
362 target_set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
363 gdb::array_view
<const int> syscall_counts
)
365 target_ops
*target
= current_inferior ()->top_target ();
367 return target
->set_syscall_catchpoint (pid
, needed
, any_count
,
374 target_rcmd (const char *command
, struct ui_file
*outbuf
)
376 return current_inferior ()->top_target ()->rcmd (command
, outbuf
);
382 target_can_lock_scheduler ()
384 target_ops
*target
= current_inferior ()->top_target ();
386 return (target
->get_thread_control_capabilities ()& tc_schedlock
) != 0;
392 target_can_async_p ()
394 return current_inferior ()->top_target ()->can_async_p ();
402 return current_inferior ()->top_target ()->is_async_p ();
406 target_execution_direction ()
408 return current_inferior ()->top_target ()->execution_direction ();
414 target_extra_thread_info (thread_info
*tp
)
416 return current_inferior ()->top_target ()->extra_thread_info (tp
);
422 target_pid_to_exec_file (int pid
)
424 return current_inferior ()->top_target ()->pid_to_exec_file (pid
);
430 target_thread_architecture (ptid_t ptid
)
432 return current_inferior ()->top_target ()->thread_architecture (ptid
);
438 target_find_memory_regions (find_memory_region_ftype func
, void *data
)
440 return current_inferior ()->top_target ()->find_memory_regions (func
, data
);
445 gdb::unique_xmalloc_ptr
<char>
446 target_make_corefile_notes (bfd
*bfd
, int *size_p
)
448 return current_inferior ()->top_target ()->make_corefile_notes (bfd
, size_p
);
452 target_get_bookmark (const char *args
, int from_tty
)
454 return current_inferior ()->top_target ()->get_bookmark (args
, from_tty
);
458 target_goto_bookmark (const gdb_byte
*arg
, int from_tty
)
460 return current_inferior ()->top_target ()->goto_bookmark (arg
, from_tty
);
466 target_stopped_by_watchpoint ()
468 return current_inferior ()->top_target ()->stopped_by_watchpoint ();
474 target_stopped_by_sw_breakpoint ()
476 return current_inferior ()->top_target ()->stopped_by_sw_breakpoint ();
480 target_supports_stopped_by_sw_breakpoint ()
482 target_ops
*target
= current_inferior ()->top_target ();
484 return target
->supports_stopped_by_sw_breakpoint ();
488 target_stopped_by_hw_breakpoint ()
490 return current_inferior ()->top_target ()->stopped_by_hw_breakpoint ();
494 target_supports_stopped_by_hw_breakpoint ()
496 target_ops
*target
= current_inferior ()->top_target ();
498 return target
->supports_stopped_by_hw_breakpoint ();
504 target_have_steppable_watchpoint ()
506 return current_inferior ()->top_target ()->have_steppable_watchpoint ();
512 target_can_use_hardware_watchpoint (bptype type
, int cnt
, int othertype
)
514 target_ops
*target
= current_inferior ()->top_target ();
516 return target
->can_use_hw_breakpoint (type
, cnt
, othertype
);
522 target_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
524 target_ops
*target
= current_inferior ()->top_target ();
526 return target
->region_ok_for_hw_watchpoint (addr
, len
);
531 target_can_do_single_step ()
533 return current_inferior ()->top_target ()->can_do_single_step ();
539 target_insert_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
542 target_ops
*target
= current_inferior ()->top_target ();
544 return target
->insert_watchpoint (addr
, len
, type
, cond
);
550 target_remove_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
553 target_ops
*target
= current_inferior ()->top_target ();
555 return target
->remove_watchpoint (addr
, len
, type
, cond
);
561 target_insert_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
563 target_ops
*target
= current_inferior ()->top_target ();
565 return target
->insert_hw_breakpoint (gdbarch
, bp_tgt
);
571 target_remove_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
573 target_ops
*target
= current_inferior ()->top_target ();
575 return target
->remove_hw_breakpoint (gdbarch
, bp_tgt
);
581 target_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int type
,
584 target_ops
*target
= current_inferior ()->top_target ();
586 return target
->can_accel_watchpoint_condition (addr
, len
, type
, cond
);
592 target_can_execute_reverse ()
594 return current_inferior ()->top_target ()->can_execute_reverse ();
598 target_get_ada_task_ptid (long lwp
, long tid
)
600 return current_inferior ()->top_target ()->get_ada_task_ptid (lwp
, tid
);
604 target_filesystem_is_local ()
606 return current_inferior ()->top_target ()->filesystem_is_local ();
612 return current_inferior ()->top_target ()->trace_init ();
616 target_download_tracepoint (bp_location
*location
)
618 return current_inferior ()->top_target ()->download_tracepoint (location
);
622 target_can_download_tracepoint ()
624 return current_inferior ()->top_target ()->can_download_tracepoint ();
628 target_download_trace_state_variable (const trace_state_variable
&tsv
)
630 target_ops
*target
= current_inferior ()->top_target ();
632 return target
->download_trace_state_variable (tsv
);
636 target_enable_tracepoint (bp_location
*loc
)
638 return current_inferior ()->top_target ()->enable_tracepoint (loc
);
642 target_disable_tracepoint (bp_location
*loc
)
644 return current_inferior ()->top_target ()->disable_tracepoint (loc
);
648 target_trace_start ()
650 return current_inferior ()->top_target ()->trace_start ();
654 target_trace_set_readonly_regions ()
656 return current_inferior ()->top_target ()->trace_set_readonly_regions ();
660 target_get_trace_status (trace_status
*ts
)
662 return current_inferior ()->top_target ()->get_trace_status (ts
);
666 target_get_tracepoint_status (breakpoint
*tp
, uploaded_tp
*utp
)
668 return current_inferior ()->top_target ()->get_tracepoint_status (tp
, utp
);
674 return current_inferior ()->top_target ()->trace_stop ();
678 target_trace_find (trace_find_type type
, int num
,
679 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
)
681 target_ops
*target
= current_inferior ()->top_target ();
683 return target
->trace_find (type
, num
, addr1
, addr2
, tpp
);
687 target_get_trace_state_variable_value (int tsv
, LONGEST
*val
)
689 target_ops
*target
= current_inferior ()->top_target ();
691 return target
->get_trace_state_variable_value (tsv
, val
);
695 target_save_trace_data (const char *filename
)
697 return current_inferior ()->top_target ()->save_trace_data (filename
);
701 target_upload_tracepoints (uploaded_tp
**utpp
)
703 return current_inferior ()->top_target ()->upload_tracepoints (utpp
);
707 target_upload_trace_state_variables (uploaded_tsv
**utsvp
)
709 target_ops
*target
= current_inferior ()->top_target ();
711 return target
->upload_trace_state_variables (utsvp
);
715 target_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
717 target_ops
*target
= current_inferior ()->top_target ();
719 return target
->get_raw_trace_data (buf
, offset
, len
);
723 target_get_min_fast_tracepoint_insn_len ()
725 target_ops
*target
= current_inferior ()->top_target ();
727 return target
->get_min_fast_tracepoint_insn_len ();
731 target_set_disconnected_tracing (int val
)
733 return current_inferior ()->top_target ()->set_disconnected_tracing (val
);
737 target_set_circular_trace_buffer (int val
)
739 return current_inferior ()->top_target ()->set_circular_trace_buffer (val
);
743 target_set_trace_buffer_size (LONGEST val
)
745 return current_inferior ()->top_target ()->set_trace_buffer_size (val
);
749 target_set_trace_notes (const char *user
, const char *notes
,
750 const char *stopnotes
)
752 target_ops
*target
= current_inferior ()->top_target ();
754 return target
->set_trace_notes (user
, notes
, stopnotes
);
758 target_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
760 return current_inferior ()->top_target ()->get_tib_address (ptid
, addr
);
764 target_set_permissions ()
766 return current_inferior ()->top_target ()->set_permissions ();
770 target_static_tracepoint_marker_at (CORE_ADDR addr
,
771 static_tracepoint_marker
*marker
)
773 target_ops
*target
= current_inferior ()->top_target ();
775 return target
->static_tracepoint_marker_at (addr
, marker
);
778 std::vector
<static_tracepoint_marker
>
779 target_static_tracepoint_markers_by_strid (const char *marker_id
)
781 target_ops
*target
= current_inferior ()->top_target ();
783 return target
->static_tracepoint_markers_by_strid (marker_id
);
787 target_traceframe_info ()
789 return current_inferior ()->top_target ()->traceframe_info ();
793 target_use_agent (bool use
)
795 return current_inferior ()->top_target ()->use_agent (use
);
799 target_can_use_agent ()
801 return current_inferior ()->top_target ()->can_use_agent ();
805 target_augmented_libraries_svr4_read ()
807 return current_inferior ()->top_target ()->augmented_libraries_svr4_read ();
811 target_supports_memory_tagging ()
813 return current_inferior ()->top_target ()->supports_memory_tagging ();
817 target_fetch_memtags (CORE_ADDR address
, size_t len
, gdb::byte_vector
&tags
,
820 return current_inferior ()->top_target ()->fetch_memtags (address
, len
, tags
, type
);
824 target_store_memtags (CORE_ADDR address
, size_t len
,
825 const gdb::byte_vector
&tags
, int type
)
827 return current_inferior ()->top_target ()->store_memtags (address
, len
, tags
, type
);
831 target_log_command (const char *p
)
833 return current_inferior ()->top_target ()->log_command (p
);
836 /* This is used to implement the various target commands. */
839 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
841 auto *ti
= static_cast<target_info
*> (command
->context ());
842 target_open_ftype
*func
= target_factories
[ti
];
845 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
848 func (args
, from_tty
);
851 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
852 ti
->shortname
, args
, from_tty
);
858 add_target (const target_info
&t
, target_open_ftype
*func
,
859 completer_ftype
*completer
)
861 struct cmd_list_element
*c
;
863 auto &func_slot
= target_factories
[&t
];
864 if (func_slot
!= nullptr)
865 internal_error (__FILE__
, __LINE__
,
866 _("target already added (\"%s\")."), t
.shortname
);
869 if (targetlist
== NULL
)
870 add_basic_prefix_cmd ("target", class_run
, _("\
871 Connect to a target machine or process.\n\
872 The first argument is the type or protocol of the target machine.\n\
873 Remaining arguments are interpreted by the target protocol. For more\n\
874 information on the arguments for a particular protocol, type\n\
875 `help target ' followed by the protocol name."),
876 &targetlist
, 0, &cmdlist
);
877 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
878 c
->set_context ((void *) &t
);
879 set_cmd_sfunc (c
, open_target
);
880 if (completer
!= NULL
)
881 set_cmd_completer (c
, completer
);
887 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
889 struct cmd_list_element
*c
;
892 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
894 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
895 set_cmd_sfunc (c
, open_target
);
896 c
->set_context ((void *) &tinfo
);
897 alt
= xstrprintf ("target %s", tinfo
.shortname
);
898 deprecate_cmd (c
, alt
);
906 current_inferior ()->top_target ()->kill ();
910 target_load (const char *arg
, int from_tty
)
912 target_dcache_invalidate ();
913 current_inferior ()->top_target ()->load (arg
, from_tty
);
918 target_terminal_state
target_terminal::m_terminal_state
919 = target_terminal_state::is_ours
;
921 /* See target/target.h. */
924 target_terminal::init (void)
926 current_inferior ()->top_target ()->terminal_init ();
928 m_terminal_state
= target_terminal_state::is_ours
;
931 /* See target/target.h. */
934 target_terminal::inferior (void)
936 struct ui
*ui
= current_ui
;
938 /* A background resume (``run&'') should leave GDB in control of the
940 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
943 /* Since we always run the inferior in the main console (unless "set
944 inferior-tty" is in effect), when some UI other than the main one
945 calls target_terminal::inferior, then we leave the main UI's
946 terminal settings as is. */
950 /* If GDB is resuming the inferior in the foreground, install
951 inferior's terminal modes. */
953 struct inferior
*inf
= current_inferior ();
955 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
957 current_inferior ()->top_target ()->terminal_inferior ();
958 inf
->terminal_state
= target_terminal_state::is_inferior
;
961 m_terminal_state
= target_terminal_state::is_inferior
;
963 /* If the user hit C-c before, pretend that it was hit right
965 if (check_quit_flag ())
966 target_pass_ctrlc ();
969 /* See target/target.h. */
972 target_terminal::restore_inferior (void)
974 struct ui
*ui
= current_ui
;
976 /* See target_terminal::inferior(). */
977 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
980 /* Restore the terminal settings of inferiors that were in the
981 foreground but are now ours_for_output due to a temporary
982 target_target::ours_for_output() call. */
985 scoped_restore_current_inferior restore_inferior
;
987 for (::inferior
*inf
: all_inferiors ())
989 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
991 set_current_inferior (inf
);
992 current_inferior ()->top_target ()->terminal_inferior ();
993 inf
->terminal_state
= target_terminal_state::is_inferior
;
998 m_terminal_state
= target_terminal_state::is_inferior
;
1000 /* If the user hit C-c before, pretend that it was hit right
1002 if (check_quit_flag ())
1003 target_pass_ctrlc ();
1006 /* Switch terminal state to DESIRED_STATE, either is_ours, or
1007 is_ours_for_output. */
1010 target_terminal_is_ours_kind (target_terminal_state desired_state
)
1012 scoped_restore_current_inferior restore_inferior
;
1014 /* Must do this in two passes. First, have all inferiors save the
1015 current terminal settings. Then, after all inferiors have add a
1016 chance to safely save the terminal settings, restore GDB's
1017 terminal settings. */
1019 for (inferior
*inf
: all_inferiors ())
1021 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
1023 set_current_inferior (inf
);
1024 current_inferior ()->top_target ()->terminal_save_inferior ();
1028 for (inferior
*inf
: all_inferiors ())
1030 /* Note we don't check is_inferior here like above because we
1031 need to handle 'is_ours_for_output -> is_ours' too. Careful
1032 to never transition from 'is_ours' to 'is_ours_for_output',
1034 if (inf
->terminal_state
!= target_terminal_state::is_ours
1035 && inf
->terminal_state
!= desired_state
)
1037 set_current_inferior (inf
);
1038 if (desired_state
== target_terminal_state::is_ours
)
1039 current_inferior ()->top_target ()->terminal_ours ();
1040 else if (desired_state
== target_terminal_state::is_ours_for_output
)
1041 current_inferior ()->top_target ()->terminal_ours_for_output ();
1043 gdb_assert_not_reached ("unhandled desired state");
1044 inf
->terminal_state
= desired_state
;
1049 /* See target/target.h. */
1052 target_terminal::ours ()
1054 struct ui
*ui
= current_ui
;
1056 /* See target_terminal::inferior. */
1060 if (m_terminal_state
== target_terminal_state::is_ours
)
1063 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
1064 m_terminal_state
= target_terminal_state::is_ours
;
1067 /* See target/target.h. */
1070 target_terminal::ours_for_output ()
1072 struct ui
*ui
= current_ui
;
1074 /* See target_terminal::inferior. */
1078 if (!target_terminal::is_inferior ())
1081 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
1082 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
1085 /* See target/target.h. */
1088 target_terminal::info (const char *arg
, int from_tty
)
1090 current_inferior ()->top_target ()->terminal_info (arg
, from_tty
);
1096 target_supports_terminal_ours (void)
1098 /* The current top target is the target at the top of the target
1099 stack of the current inferior. While normally there's always an
1100 inferior, we must check for nullptr here because we can get here
1101 very early during startup, before the initial inferior is first
1103 inferior
*inf
= current_inferior ();
1107 return inf
->top_target ()->supports_terminal_ours ();
1113 error (_("You can't do that when your target is `%s'"),
1114 current_inferior ()->top_target ()->shortname ());
1120 error (_("You can't do that without a process to debug."));
1124 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
1126 printf_unfiltered (_("No saved terminal information.\n"));
1129 /* A default implementation for the to_get_ada_task_ptid target method.
1131 This function builds the PTID by using both LWP and TID as part of
1132 the PTID lwp and tid elements. The pid used is the pid of the
1136 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
1138 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
1141 static enum exec_direction_kind
1142 default_execution_direction (struct target_ops
*self
)
1144 if (!target_can_execute_reverse ())
1145 return EXEC_FORWARD
;
1146 else if (!target_can_async_p ())
1147 return EXEC_FORWARD
;
1149 gdb_assert_not_reached ("\
1150 to_execution_direction must be implemented for reverse async");
1156 decref_target (target_ops
*t
)
1159 if (t
->refcount () == 0)
1161 if (t
->stratum () == process_stratum
)
1162 connection_list_remove (as_process_stratum_target (t
));
1170 target_stack::push (target_ops
*t
)
1174 strata stratum
= t
->stratum ();
1176 if (stratum
== process_stratum
)
1177 connection_list_add (as_process_stratum_target (t
));
1179 /* If there's already a target at this stratum, remove it. */
1181 if (m_stack
[stratum
] != NULL
)
1182 unpush (m_stack
[stratum
]);
1184 /* Now add the new one. */
1185 m_stack
[stratum
] = t
;
1187 if (m_top
< stratum
)
1194 target_stack::unpush (target_ops
*t
)
1196 gdb_assert (t
!= NULL
);
1198 strata stratum
= t
->stratum ();
1200 if (stratum
== dummy_stratum
)
1201 internal_error (__FILE__
, __LINE__
,
1202 _("Attempt to unpush the dummy target"));
1204 /* Look for the specified target. Note that a target can only occur
1205 once in the target stack. */
1207 if (m_stack
[stratum
] != t
)
1209 /* If T wasn't pushed, quit. Only open targets should be
1214 /* Unchain the target. */
1215 m_stack
[stratum
] = NULL
;
1217 if (m_top
== stratum
)
1218 m_top
= this->find_beneath (t
)->stratum ();
1220 /* Finally close the target, if there are no inferiors
1221 referencing this target still. Note we do this after unchaining,
1222 so any target method calls from within the target_close
1223 implementation don't end up in T anymore. Do leave the target
1224 open if we have are other inferiors referencing this target
1231 /* Unpush TARGET and assert that it worked. */
1234 unpush_target_and_assert (struct target_ops
*target
)
1236 if (!current_inferior ()->unpush_target (target
))
1238 fprintf_unfiltered (gdb_stderr
,
1239 "pop_all_targets couldn't find target %s\n",
1240 target
->shortname ());
1241 internal_error (__FILE__
, __LINE__
,
1242 _("failed internal consistency check"));
1247 pop_all_targets_above (enum strata above_stratum
)
1249 while ((int) (current_inferior ()->top_target ()->stratum ())
1250 > (int) above_stratum
)
1251 unpush_target_and_assert (current_inferior ()->top_target ());
1257 pop_all_targets_at_and_above (enum strata stratum
)
1259 while ((int) (current_inferior ()->top_target ()->stratum ())
1261 unpush_target_and_assert (current_inferior ()->top_target ());
1265 pop_all_targets (void)
1267 pop_all_targets_above (dummy_stratum
);
1271 target_unpusher::operator() (struct target_ops
*ops
) const
1273 current_inferior ()->unpush_target (ops
);
1276 /* Default implementation of to_get_thread_local_address. */
1279 generic_tls_error (void)
1281 throw_error (TLS_GENERIC_ERROR
,
1282 _("Cannot find thread-local variables on this target"));
1285 /* Using the objfile specified in OBJFILE, find the address for the
1286 current thread's thread-local storage with offset OFFSET. */
1288 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1290 volatile CORE_ADDR addr
= 0;
1291 struct target_ops
*target
= current_inferior ()->top_target ();
1292 struct gdbarch
*gdbarch
= target_gdbarch ();
1294 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
1296 ptid_t ptid
= inferior_ptid
;
1302 /* Fetch the load module address for this objfile. */
1303 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
1306 if (gdbarch_get_thread_local_address_p (gdbarch
))
1307 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
1310 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
1312 /* If an error occurred, print TLS related messages here. Otherwise,
1313 throw the error to some higher catcher. */
1314 catch (const gdb_exception
&ex
)
1316 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1320 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1321 error (_("Cannot find thread-local variables "
1322 "in this thread library."));
1324 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1325 if (objfile_is_library
)
1326 error (_("Cannot find shared library `%s' in dynamic"
1327 " linker's load module list"), objfile_name (objfile
));
1329 error (_("Cannot find executable file `%s' in dynamic"
1330 " linker's load module list"), objfile_name (objfile
));
1332 case TLS_NOT_ALLOCATED_YET_ERROR
:
1333 if (objfile_is_library
)
1334 error (_("The inferior has not yet allocated storage for"
1335 " thread-local variables in\n"
1336 "the shared library `%s'\n"
1338 objfile_name (objfile
),
1339 target_pid_to_str (ptid
).c_str ());
1341 error (_("The inferior has not yet allocated storage for"
1342 " thread-local variables in\n"
1343 "the executable `%s'\n"
1345 objfile_name (objfile
),
1346 target_pid_to_str (ptid
).c_str ());
1348 case TLS_GENERIC_ERROR
:
1349 if (objfile_is_library
)
1350 error (_("Cannot find thread-local storage for %s, "
1351 "shared library %s:\n%s"),
1352 target_pid_to_str (ptid
).c_str (),
1353 objfile_name (objfile
), ex
.what ());
1355 error (_("Cannot find thread-local storage for %s, "
1356 "executable file %s:\n%s"),
1357 target_pid_to_str (ptid
).c_str (),
1358 objfile_name (objfile
), ex
.what ());
1367 error (_("Cannot find thread-local variables on this target"));
1373 target_xfer_status_to_string (enum target_xfer_status status
)
1375 #define CASE(X) case X: return #X
1378 CASE(TARGET_XFER_E_IO
);
1379 CASE(TARGET_XFER_UNAVAILABLE
);
1389 gdb::unique_xmalloc_ptr
<char>
1390 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
1392 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
1395 if (bytes_read
== nullptr)
1396 bytes_read
= &ignore
;
1398 /* Note that the endian-ness does not matter here. */
1399 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
1400 &buffer
, bytes_read
);
1404 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1407 const target_section_table
*
1408 target_get_section_table (struct target_ops
*target
)
1410 return target
->get_section_table ();
1413 /* Find a section containing ADDR. */
1415 const struct target_section
*
1416 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1418 const target_section_table
*table
= target_get_section_table (target
);
1423 for (const target_section
&secp
: *table
)
1425 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1433 const target_section_table
*
1434 default_get_section_table ()
1436 return ¤t_program_space
->target_sections ();
1439 /* Helper for the memory xfer routines. Checks the attributes of the
1440 memory region of MEMADDR against the read or write being attempted.
1441 If the access is permitted returns true, otherwise returns false.
1442 REGION_P is an optional output parameter. If not-NULL, it is
1443 filled with a pointer to the memory region of MEMADDR. REG_LEN
1444 returns LEN trimmed to the end of the region. This is how much the
1445 caller can continue requesting, if the access is permitted. A
1446 single xfer request must not straddle memory region boundaries. */
1449 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1450 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1451 struct mem_region
**region_p
)
1453 struct mem_region
*region
;
1455 region
= lookup_mem_region (memaddr
);
1457 if (region_p
!= NULL
)
1460 switch (region
->attrib
.mode
)
1463 if (writebuf
!= NULL
)
1468 if (readbuf
!= NULL
)
1473 /* We only support writing to flash during "load" for now. */
1474 if (writebuf
!= NULL
)
1475 error (_("Writing to flash memory forbidden in this context"));
1482 /* region->hi == 0 means there's no upper bound. */
1483 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1486 *reg_len
= region
->hi
- memaddr
;
1491 /* Read memory from more than one valid target. A core file, for
1492 instance, could have some of memory but delegate other bits to
1493 the target below it. So, we must manually try all targets. */
1495 enum target_xfer_status
1496 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1497 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1498 ULONGEST
*xfered_len
)
1500 enum target_xfer_status res
;
1504 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1505 readbuf
, writebuf
, memaddr
, len
,
1507 if (res
== TARGET_XFER_OK
)
1510 /* Stop if the target reports that the memory is not available. */
1511 if (res
== TARGET_XFER_UNAVAILABLE
)
1514 /* Don't continue past targets which have all the memory.
1515 At one time, this code was necessary to read data from
1516 executables / shared libraries when data for the requested
1517 addresses weren't available in the core file. But now the
1518 core target handles this case itself. */
1519 if (ops
->has_all_memory ())
1522 ops
= ops
->beneath ();
1524 while (ops
!= NULL
);
1526 /* The cache works at the raw memory level. Make sure the cache
1527 gets updated with raw contents no matter what kind of memory
1528 object was originally being written. Note we do write-through
1529 first, so that if it fails, we don't write to the cache contents
1530 that never made it to the target. */
1531 if (writebuf
!= NULL
1532 && inferior_ptid
!= null_ptid
1533 && target_dcache_init_p ()
1534 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1536 DCACHE
*dcache
= target_dcache_get ();
1538 /* Note that writing to an area of memory which wasn't present
1539 in the cache doesn't cause it to be loaded in. */
1540 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1546 /* Perform a partial memory transfer.
1547 For docs see target.h, to_xfer_partial. */
1549 static enum target_xfer_status
1550 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1551 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1552 ULONGEST len
, ULONGEST
*xfered_len
)
1554 enum target_xfer_status res
;
1556 struct mem_region
*region
;
1557 struct inferior
*inf
;
1559 /* For accesses to unmapped overlay sections, read directly from
1560 files. Must do this first, as MEMADDR may need adjustment. */
1561 if (readbuf
!= NULL
&& overlay_debugging
)
1563 struct obj_section
*section
= find_pc_overlay (memaddr
);
1565 if (pc_in_unmapped_range (memaddr
, section
))
1567 const target_section_table
*table
= target_get_section_table (ops
);
1568 const char *section_name
= section
->the_bfd_section
->name
;
1570 memaddr
= overlay_mapped_address (memaddr
, section
);
1572 auto match_cb
= [=] (const struct target_section
*s
)
1574 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1577 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1578 memaddr
, len
, xfered_len
,
1583 /* Try the executable files, if "trust-readonly-sections" is set. */
1584 if (readbuf
!= NULL
&& trust_readonly
)
1586 const struct target_section
*secp
1587 = target_section_by_addr (ops
, memaddr
);
1589 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1591 const target_section_table
*table
= target_get_section_table (ops
);
1592 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1593 memaddr
, len
, xfered_len
,
1598 /* Try GDB's internal data cache. */
1600 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1602 return TARGET_XFER_E_IO
;
1604 if (inferior_ptid
!= null_ptid
)
1605 inf
= current_inferior ();
1611 /* The dcache reads whole cache lines; that doesn't play well
1612 with reading from a trace buffer, because reading outside of
1613 the collected memory range fails. */
1614 && get_traceframe_number () == -1
1615 && (region
->attrib
.cache
1616 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1617 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1619 DCACHE
*dcache
= target_dcache_get_or_init ();
1621 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1622 reg_len
, xfered_len
);
1625 /* If none of those methods found the memory we wanted, fall back
1626 to a target partial transfer. Normally a single call to
1627 to_xfer_partial is enough; if it doesn't recognize an object
1628 it will call the to_xfer_partial of the next target down.
1629 But for memory this won't do. Memory is the only target
1630 object which can be read from more than one valid target.
1631 A core file, for instance, could have some of memory but
1632 delegate other bits to the target below it. So, we must
1633 manually try all targets. */
1635 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1638 /* If we still haven't got anything, return the last error. We
1643 /* Perform a partial memory transfer. For docs see target.h,
1646 static enum target_xfer_status
1647 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1648 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1649 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1651 enum target_xfer_status res
;
1653 /* Zero length requests are ok and require no work. */
1655 return TARGET_XFER_EOF
;
1657 memaddr
= address_significant (target_gdbarch (), memaddr
);
1659 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1660 breakpoint insns, thus hiding out from higher layers whether
1661 there are software breakpoints inserted in the code stream. */
1662 if (readbuf
!= NULL
)
1664 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1667 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1668 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1672 /* A large write request is likely to be partially satisfied
1673 by memory_xfer_partial_1. We will continually malloc
1674 and free a copy of the entire write request for breakpoint
1675 shadow handling even though we only end up writing a small
1676 subset of it. Cap writes to a limit specified by the target
1677 to mitigate this. */
1678 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1680 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1681 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1682 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1689 scoped_restore_tmpl
<int>
1690 make_scoped_restore_show_memory_breakpoints (int show
)
1692 return make_scoped_restore (&show_memory_breakpoints
, show
);
1695 /* For docs see target.h, to_xfer_partial. */
1697 enum target_xfer_status
1698 target_xfer_partial (struct target_ops
*ops
,
1699 enum target_object object
, const char *annex
,
1700 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1701 ULONGEST offset
, ULONGEST len
,
1702 ULONGEST
*xfered_len
)
1704 enum target_xfer_status retval
;
1706 /* Transfer is done when LEN is zero. */
1708 return TARGET_XFER_EOF
;
1710 if (writebuf
&& !may_write_memory
)
1711 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1712 core_addr_to_string_nz (offset
), plongest (len
));
1716 /* If this is a memory transfer, let the memory-specific code
1717 have a look at it instead. Memory transfers are more
1719 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1720 || object
== TARGET_OBJECT_CODE_MEMORY
)
1721 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1722 writebuf
, offset
, len
, xfered_len
);
1723 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1725 /* Skip/avoid accessing the target if the memory region
1726 attributes block the access. Check this here instead of in
1727 raw_memory_xfer_partial as otherwise we'd end up checking
1728 this twice in the case of the memory_xfer_partial path is
1729 taken; once before checking the dcache, and another in the
1730 tail call to raw_memory_xfer_partial. */
1731 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1733 return TARGET_XFER_E_IO
;
1735 /* Request the normal memory object from other layers. */
1736 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1740 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1741 writebuf
, offset
, len
, xfered_len
);
1745 const unsigned char *myaddr
= NULL
;
1747 fprintf_unfiltered (gdb_stdlog
,
1748 "%s:target_xfer_partial "
1749 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1752 (annex
? annex
: "(null)"),
1753 host_address_to_string (readbuf
),
1754 host_address_to_string (writebuf
),
1755 core_addr_to_string_nz (offset
),
1756 pulongest (len
), retval
,
1757 pulongest (*xfered_len
));
1763 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1767 fputs_unfiltered (", bytes =", gdb_stdlog
);
1768 for (i
= 0; i
< *xfered_len
; i
++)
1770 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1772 if (targetdebug
< 2 && i
> 0)
1774 fprintf_unfiltered (gdb_stdlog
, " ...");
1777 fprintf_unfiltered (gdb_stdlog
, "\n");
1780 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1784 fputc_unfiltered ('\n', gdb_stdlog
);
1787 /* Check implementations of to_xfer_partial update *XFERED_LEN
1788 properly. Do assertion after printing debug messages, so that we
1789 can find more clues on assertion failure from debugging messages. */
1790 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1791 gdb_assert (*xfered_len
> 0);
1796 /* Read LEN bytes of target memory at address MEMADDR, placing the
1797 results in GDB's memory at MYADDR. Returns either 0 for success or
1798 -1 if any error occurs.
1800 If an error occurs, no guarantee is made about the contents of the data at
1801 MYADDR. In particular, the caller should not depend upon partial reads
1802 filling the buffer with good data. There is no way for the caller to know
1803 how much good data might have been transfered anyway. Callers that can
1804 deal with partial reads should call target_read (which will retry until
1805 it makes no progress, and then return how much was transferred). */
1808 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1810 if (target_read (current_inferior ()->top_target (),
1811 TARGET_OBJECT_MEMORY
, NULL
,
1812 myaddr
, memaddr
, len
) == len
)
1818 /* See target/target.h. */
1821 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1826 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1829 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1830 gdbarch_byte_order (target_gdbarch ()));
1834 /* Like target_read_memory, but specify explicitly that this is a read
1835 from the target's raw memory. That is, this read bypasses the
1836 dcache, breakpoint shadowing, etc. */
1839 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1841 if (target_read (current_inferior ()->top_target (),
1842 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1843 myaddr
, memaddr
, len
) == len
)
1849 /* Like target_read_memory, but specify explicitly that this is a read from
1850 the target's stack. This may trigger different cache behavior. */
1853 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1855 if (target_read (current_inferior ()->top_target (),
1856 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1857 myaddr
, memaddr
, len
) == len
)
1863 /* Like target_read_memory, but specify explicitly that this is a read from
1864 the target's code. This may trigger different cache behavior. */
1867 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1869 if (target_read (current_inferior ()->top_target (),
1870 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1871 myaddr
, memaddr
, len
) == len
)
1877 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1878 Returns either 0 for success or -1 if any error occurs. If an
1879 error occurs, no guarantee is made about how much data got written.
1880 Callers that can deal with partial writes should call
1884 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1886 if (target_write (current_inferior ()->top_target (),
1887 TARGET_OBJECT_MEMORY
, NULL
,
1888 myaddr
, memaddr
, len
) == len
)
1894 /* Write LEN bytes from MYADDR to target raw memory at address
1895 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1896 If an error occurs, no guarantee is made about how much data got
1897 written. Callers that can deal with partial writes should call
1901 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1903 if (target_write (current_inferior ()->top_target (),
1904 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1905 myaddr
, memaddr
, len
) == len
)
1911 /* Fetch the target's memory map. */
1913 std::vector
<mem_region
>
1914 target_memory_map (void)
1916 target_ops
*target
= current_inferior ()->top_target ();
1917 std::vector
<mem_region
> result
= target
->memory_map ();
1918 if (result
.empty ())
1921 std::sort (result
.begin (), result
.end ());
1923 /* Check that regions do not overlap. Simultaneously assign
1924 a numbering for the "mem" commands to use to refer to
1926 mem_region
*last_one
= NULL
;
1927 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1929 mem_region
*this_one
= &result
[ix
];
1930 this_one
->number
= ix
;
1932 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1934 warning (_("Overlapping regions in memory map: ignoring"));
1935 return std::vector
<mem_region
> ();
1938 last_one
= this_one
;
1945 target_flash_erase (ULONGEST address
, LONGEST length
)
1947 current_inferior ()->top_target ()->flash_erase (address
, length
);
1951 target_flash_done (void)
1953 current_inferior ()->top_target ()->flash_done ();
1957 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1958 struct cmd_list_element
*c
, const char *value
)
1960 fprintf_filtered (file
,
1961 _("Mode for reading from readonly sections is %s.\n"),
1965 /* Target vector read/write partial wrapper functions. */
1967 static enum target_xfer_status
1968 target_read_partial (struct target_ops
*ops
,
1969 enum target_object object
,
1970 const char *annex
, gdb_byte
*buf
,
1971 ULONGEST offset
, ULONGEST len
,
1972 ULONGEST
*xfered_len
)
1974 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1978 static enum target_xfer_status
1979 target_write_partial (struct target_ops
*ops
,
1980 enum target_object object
,
1981 const char *annex
, const gdb_byte
*buf
,
1982 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1984 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1988 /* Wrappers to perform the full transfer. */
1990 /* For docs on target_read see target.h. */
1993 target_read (struct target_ops
*ops
,
1994 enum target_object object
,
1995 const char *annex
, gdb_byte
*buf
,
1996 ULONGEST offset
, LONGEST len
)
1998 LONGEST xfered_total
= 0;
2001 /* If we are reading from a memory object, find the length of an addressable
2002 unit for that architecture. */
2003 if (object
== TARGET_OBJECT_MEMORY
2004 || object
== TARGET_OBJECT_STACK_MEMORY
2005 || object
== TARGET_OBJECT_CODE_MEMORY
2006 || object
== TARGET_OBJECT_RAW_MEMORY
)
2007 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2009 while (xfered_total
< len
)
2011 ULONGEST xfered_partial
;
2012 enum target_xfer_status status
;
2014 status
= target_read_partial (ops
, object
, annex
,
2015 buf
+ xfered_total
* unit_size
,
2016 offset
+ xfered_total
, len
- xfered_total
,
2019 /* Call an observer, notifying them of the xfer progress? */
2020 if (status
== TARGET_XFER_EOF
)
2021 return xfered_total
;
2022 else if (status
== TARGET_XFER_OK
)
2024 xfered_total
+= xfered_partial
;
2028 return TARGET_XFER_E_IO
;
2034 /* Assuming that the entire [begin, end) range of memory cannot be
2035 read, try to read whatever subrange is possible to read.
2037 The function returns, in RESULT, either zero or one memory block.
2038 If there's a readable subrange at the beginning, it is completely
2039 read and returned. Any further readable subrange will not be read.
2040 Otherwise, if there's a readable subrange at the end, it will be
2041 completely read and returned. Any readable subranges before it
2042 (obviously, not starting at the beginning), will be ignored. In
2043 other cases -- either no readable subrange, or readable subrange(s)
2044 that is neither at the beginning, or end, nothing is returned.
2046 The purpose of this function is to handle a read across a boundary
2047 of accessible memory in a case when memory map is not available.
2048 The above restrictions are fine for this case, but will give
2049 incorrect results if the memory is 'patchy'. However, supporting
2050 'patchy' memory would require trying to read every single byte,
2051 and it seems unacceptable solution. Explicit memory map is
2052 recommended for this case -- and target_read_memory_robust will
2053 take care of reading multiple ranges then. */
2056 read_whatever_is_readable (struct target_ops
*ops
,
2057 const ULONGEST begin
, const ULONGEST end
,
2059 std::vector
<memory_read_result
> *result
)
2061 ULONGEST current_begin
= begin
;
2062 ULONGEST current_end
= end
;
2064 ULONGEST xfered_len
;
2066 /* If we previously failed to read 1 byte, nothing can be done here. */
2067 if (end
- begin
<= 1)
2070 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2072 /* Check that either first or the last byte is readable, and give up
2073 if not. This heuristic is meant to permit reading accessible memory
2074 at the boundary of accessible region. */
2075 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2076 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2081 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2082 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2083 &xfered_len
) == TARGET_XFER_OK
)
2091 /* Loop invariant is that the [current_begin, current_end) was previously
2092 found to be not readable as a whole.
2094 Note loop condition -- if the range has 1 byte, we can't divide the range
2095 so there's no point trying further. */
2096 while (current_end
- current_begin
> 1)
2098 ULONGEST first_half_begin
, first_half_end
;
2099 ULONGEST second_half_begin
, second_half_end
;
2101 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2105 first_half_begin
= current_begin
;
2106 first_half_end
= middle
;
2107 second_half_begin
= middle
;
2108 second_half_end
= current_end
;
2112 first_half_begin
= middle
;
2113 first_half_end
= current_end
;
2114 second_half_begin
= current_begin
;
2115 second_half_end
= middle
;
2118 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2119 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2121 first_half_end
- first_half_begin
);
2123 if (xfer
== first_half_end
- first_half_begin
)
2125 /* This half reads up fine. So, the error must be in the
2127 current_begin
= second_half_begin
;
2128 current_end
= second_half_end
;
2132 /* This half is not readable. Because we've tried one byte, we
2133 know some part of this half if actually readable. Go to the next
2134 iteration to divide again and try to read.
2136 We don't handle the other half, because this function only tries
2137 to read a single readable subrange. */
2138 current_begin
= first_half_begin
;
2139 current_end
= first_half_end
;
2145 /* The [begin, current_begin) range has been read. */
2146 result
->emplace_back (begin
, current_end
, std::move (buf
));
2150 /* The [current_end, end) range has been read. */
2151 LONGEST region_len
= end
- current_end
;
2153 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2154 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2155 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2156 region_len
* unit_size
);
2157 result
->emplace_back (current_end
, end
, std::move (data
));
2161 std::vector
<memory_read_result
>
2162 read_memory_robust (struct target_ops
*ops
,
2163 const ULONGEST offset
, const LONGEST len
)
2165 std::vector
<memory_read_result
> result
;
2166 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2168 LONGEST xfered_total
= 0;
2169 while (xfered_total
< len
)
2171 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2174 /* If there is no explicit region, a fake one should be created. */
2175 gdb_assert (region
);
2177 if (region
->hi
== 0)
2178 region_len
= len
- xfered_total
;
2180 region_len
= region
->hi
- offset
;
2182 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2184 /* Cannot read this region. Note that we can end up here only
2185 if the region is explicitly marked inaccessible, or
2186 'inaccessible-by-default' is in effect. */
2187 xfered_total
+= region_len
;
2191 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2192 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2193 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2195 LONGEST xfered_partial
=
2196 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2197 offset
+ xfered_total
, to_read
);
2198 /* Call an observer, notifying them of the xfer progress? */
2199 if (xfered_partial
<= 0)
2201 /* Got an error reading full chunk. See if maybe we can read
2203 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2204 offset
+ xfered_total
+ to_read
,
2205 unit_size
, &result
);
2206 xfered_total
+= to_read
;
2210 result
.emplace_back (offset
+ xfered_total
,
2211 offset
+ xfered_total
+ xfered_partial
,
2212 std::move (buffer
));
2213 xfered_total
+= xfered_partial
;
2223 /* An alternative to target_write with progress callbacks. */
2226 target_write_with_progress (struct target_ops
*ops
,
2227 enum target_object object
,
2228 const char *annex
, const gdb_byte
*buf
,
2229 ULONGEST offset
, LONGEST len
,
2230 void (*progress
) (ULONGEST
, void *), void *baton
)
2232 LONGEST xfered_total
= 0;
2235 /* If we are writing to a memory object, find the length of an addressable
2236 unit for that architecture. */
2237 if (object
== TARGET_OBJECT_MEMORY
2238 || object
== TARGET_OBJECT_STACK_MEMORY
2239 || object
== TARGET_OBJECT_CODE_MEMORY
2240 || object
== TARGET_OBJECT_RAW_MEMORY
)
2241 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2243 /* Give the progress callback a chance to set up. */
2245 (*progress
) (0, baton
);
2247 while (xfered_total
< len
)
2249 ULONGEST xfered_partial
;
2250 enum target_xfer_status status
;
2252 status
= target_write_partial (ops
, object
, annex
,
2253 buf
+ xfered_total
* unit_size
,
2254 offset
+ xfered_total
, len
- xfered_total
,
2257 if (status
!= TARGET_XFER_OK
)
2258 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2261 (*progress
) (xfered_partial
, baton
);
2263 xfered_total
+= xfered_partial
;
2269 /* For docs on target_write see target.h. */
2272 target_write (struct target_ops
*ops
,
2273 enum target_object object
,
2274 const char *annex
, const gdb_byte
*buf
,
2275 ULONGEST offset
, LONGEST len
)
2277 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2281 /* Help for target_read_alloc and target_read_stralloc. See their comments
2284 template <typename T
>
2285 gdb::optional
<gdb::def_vector
<T
>>
2286 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2289 gdb::def_vector
<T
> buf
;
2291 const int chunk
= 4096;
2293 /* This function does not have a length parameter; it reads the
2294 entire OBJECT). Also, it doesn't support objects fetched partly
2295 from one target and partly from another (in a different stratum,
2296 e.g. a core file and an executable). Both reasons make it
2297 unsuitable for reading memory. */
2298 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2300 /* Start by reading up to 4K at a time. The target will throttle
2301 this number down if necessary. */
2304 ULONGEST xfered_len
;
2305 enum target_xfer_status status
;
2307 buf
.resize (buf_pos
+ chunk
);
2309 status
= target_read_partial (ops
, object
, annex
,
2310 (gdb_byte
*) &buf
[buf_pos
],
2314 if (status
== TARGET_XFER_EOF
)
2316 /* Read all there was. */
2317 buf
.resize (buf_pos
);
2320 else if (status
!= TARGET_XFER_OK
)
2322 /* An error occurred. */
2326 buf_pos
+= xfered_len
;
2334 gdb::optional
<gdb::byte_vector
>
2335 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2338 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2343 gdb::optional
<gdb::char_vector
>
2344 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2347 gdb::optional
<gdb::char_vector
> buf
2348 = target_read_alloc_1
<char> (ops
, object
, annex
);
2353 if (buf
->empty () || buf
->back () != '\0')
2354 buf
->push_back ('\0');
2356 /* Check for embedded NUL bytes; but allow trailing NULs. */
2357 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2358 it
!= buf
->end (); it
++)
2361 warning (_("target object %d, annex %s, "
2362 "contained unexpected null characters"),
2363 (int) object
, annex
? annex
: "(none)");
2370 /* Memory transfer methods. */
2373 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2376 /* This method is used to read from an alternate, non-current
2377 target. This read must bypass the overlay support (as symbols
2378 don't match this target), and GDB's internal cache (wrong cache
2379 for this target). */
2380 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2382 memory_error (TARGET_XFER_E_IO
, addr
);
2386 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2387 int len
, enum bfd_endian byte_order
)
2389 gdb_byte buf
[sizeof (ULONGEST
)];
2391 gdb_assert (len
<= sizeof (buf
));
2392 get_target_memory (ops
, addr
, buf
, len
);
2393 return extract_unsigned_integer (buf
, len
, byte_order
);
2399 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2400 struct bp_target_info
*bp_tgt
)
2402 if (!may_insert_breakpoints
)
2404 warning (_("May not insert breakpoints"));
2408 target_ops
*target
= current_inferior ()->top_target ();
2410 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2416 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2417 struct bp_target_info
*bp_tgt
,
2418 enum remove_bp_reason reason
)
2420 /* This is kind of a weird case to handle, but the permission might
2421 have been changed after breakpoints were inserted - in which case
2422 we should just take the user literally and assume that any
2423 breakpoints should be left in place. */
2424 if (!may_insert_breakpoints
)
2426 warning (_("May not remove breakpoints"));
2430 target_ops
*target
= current_inferior ()->top_target ();
2432 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2436 info_target_command (const char *args
, int from_tty
)
2438 int has_all_mem
= 0;
2440 if (current_program_space
->symfile_object_file
!= NULL
)
2442 objfile
*objf
= current_program_space
->symfile_object_file
;
2443 printf_unfiltered (_("Symbols from \"%s\".\n"),
2444 objfile_name (objf
));
2447 for (target_ops
*t
= current_inferior ()->top_target ();
2451 if (!t
->has_memory ())
2454 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2457 printf_unfiltered (_("\tWhile running this, "
2458 "GDB does not access memory from...\n"));
2459 printf_unfiltered ("%s:\n", t
->longname ());
2461 has_all_mem
= t
->has_all_memory ();
2465 /* This function is called before any new inferior is created, e.g.
2466 by running a program, attaching, or connecting to a target.
2467 It cleans up any state from previous invocations which might
2468 change between runs. This is a subset of what target_preopen
2469 resets (things which might change between targets). */
2472 target_pre_inferior (int from_tty
)
2474 /* Clear out solib state. Otherwise the solib state of the previous
2475 inferior might have survived and is entirely wrong for the new
2476 target. This has been observed on GNU/Linux using glibc 2.3. How
2488 Cannot access memory at address 0xdeadbeef
2491 /* In some OSs, the shared library list is the same/global/shared
2492 across inferiors. If code is shared between processes, so are
2493 memory regions and features. */
2494 if (!gdbarch_has_global_solist (target_gdbarch ()))
2496 no_shared_libraries (NULL
, from_tty
);
2498 invalidate_target_mem_regions ();
2500 target_clear_description ();
2503 /* attach_flag may be set if the previous process associated with
2504 the inferior was attached to. */
2505 current_inferior ()->attach_flag
= 0;
2507 current_inferior ()->highest_thread_num
= 0;
2509 agent_capability_invalidate ();
2512 /* This is to be called by the open routine before it does
2516 target_preopen (int from_tty
)
2520 if (current_inferior ()->pid
!= 0)
2523 || !target_has_execution ()
2524 || query (_("A program is being debugged already. Kill it? ")))
2526 /* Core inferiors actually should be detached, not
2528 if (target_has_execution ())
2531 target_detach (current_inferior (), 0);
2534 error (_("Program not killed."));
2537 /* Calling target_kill may remove the target from the stack. But if
2538 it doesn't (which seems like a win for UDI), remove it now. */
2539 /* Leave the exec target, though. The user may be switching from a
2540 live process to a core of the same program. */
2541 pop_all_targets_above (file_stratum
);
2543 target_pre_inferior (from_tty
);
2549 target_detach (inferior
*inf
, int from_tty
)
2551 /* After we have detached, we will clear the register cache for this inferior
2552 by calling registers_changed_ptid. We must save the pid_ptid before
2553 detaching, as the target detach method will clear inf->pid. */
2554 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2556 /* As long as some to_detach implementations rely on the current_inferior
2557 (either directly, or indirectly, like through target_gdbarch or by
2558 reading memory), INF needs to be the current inferior. When that
2559 requirement will become no longer true, then we can remove this
2561 gdb_assert (inf
== current_inferior ());
2563 prepare_for_detach ();
2565 /* Hold a strong reference because detaching may unpush the
2567 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2569 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2571 process_stratum_target
*proc_target
2572 = as_process_stratum_target (proc_target_ref
.get ());
2574 registers_changed_ptid (proc_target
, save_pid_ptid
);
2576 /* We have to ensure we have no frame cache left. Normally,
2577 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2578 inferior_ptid matches save_pid_ptid, but in our case, it does not
2579 call it, as inferior_ptid has been reset. */
2580 reinit_frame_cache ();
2584 target_disconnect (const char *args
, int from_tty
)
2586 /* If we're in breakpoints-always-inserted mode or if breakpoints
2587 are global across processes, we have to remove them before
2589 remove_breakpoints ();
2591 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2594 /* See target/target.h. */
2597 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2598 target_wait_flags options
)
2600 target_ops
*target
= current_inferior ()->top_target ();
2601 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2603 gdb_assert (!proc_target
->commit_resumed_state
);
2605 if (!target
->can_async_p ())
2606 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2608 return target
->wait (ptid
, status
, options
);
2614 default_target_wait (struct target_ops
*ops
,
2615 ptid_t ptid
, struct target_waitstatus
*status
,
2616 target_wait_flags options
)
2618 status
->kind
= TARGET_WAITKIND_IGNORE
;
2619 return minus_one_ptid
;
2623 target_pid_to_str (ptid_t ptid
)
2625 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2629 target_thread_name (struct thread_info
*info
)
2631 gdb_assert (info
->inf
== current_inferior ());
2633 return current_inferior ()->top_target ()->thread_name (info
);
2636 struct thread_info
*
2637 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2639 struct inferior
*inf
)
2641 target_ops
*target
= current_inferior ()->top_target ();
2643 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2649 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2651 target_ops
*target
= current_inferior ()->top_target ();
2653 return target
->thread_info_to_thread_handle (tip
);
2657 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2659 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2660 gdb_assert (!curr_target
->commit_resumed_state
);
2662 target_dcache_invalidate ();
2664 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2666 registers_changed_ptid (curr_target
, ptid
);
2667 /* We only set the internal executing state here. The user/frontend
2668 running state is set at a higher level. This also clears the
2669 thread's stop_pc as side effect. */
2670 set_executing (curr_target
, ptid
, true);
2671 clear_inline_frame_state (curr_target
, ptid
);
2677 target_commit_resumed ()
2679 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2680 current_inferior ()->top_target ()->commit_resumed ();
2686 target_has_pending_events ()
2688 return current_inferior ()->top_target ()->has_pending_events ();
2692 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2694 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2698 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2700 current_inferior ()->top_target ()->program_signals (program_signals
);
2704 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2707 /* Some target returned a fork event, but did not know how to follow it. */
2708 internal_error (__FILE__
, __LINE__
,
2709 _("could not find a target to follow fork"));
2715 target_follow_fork (bool follow_child
, bool detach_fork
)
2717 target_ops
*target
= current_inferior ()->top_target ();
2719 return target
->follow_fork (follow_child
, detach_fork
);
2725 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2726 const char *execd_pathname
)
2728 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2733 default_mourn_inferior (struct target_ops
*self
)
2735 internal_error (__FILE__
, __LINE__
,
2736 _("could not find a target to follow mourn inferior"));
2740 target_mourn_inferior (ptid_t ptid
)
2742 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2743 current_inferior ()->top_target ()->mourn_inferior ();
2745 /* We no longer need to keep handles on any of the object files.
2746 Make sure to release them to avoid unnecessarily locking any
2747 of them while we're not actually debugging. */
2748 bfd_cache_close_all ();
2751 /* Look for a target which can describe architectural features, starting
2752 from TARGET. If we find one, return its description. */
2754 const struct target_desc
*
2755 target_read_description (struct target_ops
*target
)
2757 return target
->read_description ();
2761 /* Default implementation of memory-searching. */
2764 default_search_memory (struct target_ops
*self
,
2765 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2766 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2767 CORE_ADDR
*found_addrp
)
2769 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2771 return target_read (current_inferior ()->top_target (),
2772 TARGET_OBJECT_MEMORY
, NULL
,
2773 result
, addr
, len
) == len
;
2776 /* Start over from the top of the target stack. */
2777 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2778 pattern
, pattern_len
, found_addrp
);
2781 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2782 sequence of bytes in PATTERN with length PATTERN_LEN.
2784 The result is 1 if found, 0 if not found, and -1 if there was an error
2785 requiring halting of the search (e.g. memory read error).
2786 If the pattern is found the address is recorded in FOUND_ADDRP. */
2789 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2790 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2791 CORE_ADDR
*found_addrp
)
2793 target_ops
*target
= current_inferior ()->top_target ();
2795 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2796 pattern_len
, found_addrp
);
2799 /* Look through the currently pushed targets. If none of them will
2800 be able to restart the currently running process, issue an error
2804 target_require_runnable (void)
2806 for (target_ops
*t
= current_inferior ()->top_target ();
2810 /* If this target knows how to create a new program, then
2811 assume we will still be able to after killing the current
2812 one. Either killing and mourning will not pop T, or else
2813 find_default_run_target will find it again. */
2814 if (t
->can_create_inferior ())
2817 /* Do not worry about targets at certain strata that can not
2818 create inferiors. Assume they will be pushed again if
2819 necessary, and continue to the process_stratum. */
2820 if (t
->stratum () > process_stratum
)
2823 error (_("The \"%s\" target does not support \"run\". "
2824 "Try \"help target\" or \"continue\"."),
2828 /* This function is only called if the target is running. In that
2829 case there should have been a process_stratum target and it
2830 should either know how to create inferiors, or not... */
2831 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2834 /* Whether GDB is allowed to fall back to the default run target for
2835 "run", "attach", etc. when no target is connected yet. */
2836 static bool auto_connect_native_target
= true;
2839 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2840 struct cmd_list_element
*c
, const char *value
)
2842 fprintf_filtered (file
,
2843 _("Whether GDB may automatically connect to the "
2844 "native target is %s.\n"),
2848 /* A pointer to the target that can respond to "run" or "attach".
2849 Native targets are always singletons and instantiated early at GDB
2851 static target_ops
*the_native_target
;
2856 set_native_target (target_ops
*target
)
2858 if (the_native_target
!= NULL
)
2859 internal_error (__FILE__
, __LINE__
,
2860 _("native target already set (\"%s\")."),
2861 the_native_target
->longname ());
2863 the_native_target
= target
;
2869 get_native_target ()
2871 return the_native_target
;
2874 /* Look through the list of possible targets for a target that can
2875 execute a run or attach command without any other data. This is
2876 used to locate the default process stratum.
2878 If DO_MESG is not NULL, the result is always valid (error() is
2879 called for errors); else, return NULL on error. */
2881 static struct target_ops
*
2882 find_default_run_target (const char *do_mesg
)
2884 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2885 return the_native_target
;
2887 if (do_mesg
!= NULL
)
2888 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2895 find_attach_target (void)
2897 /* If a target on the current stack can attach, use it. */
2898 for (target_ops
*t
= current_inferior ()->top_target ();
2902 if (t
->can_attach ())
2906 /* Otherwise, use the default run target for attaching. */
2907 return find_default_run_target ("attach");
2913 find_run_target (void)
2915 /* If a target on the current stack can run, use it. */
2916 for (target_ops
*t
= current_inferior ()->top_target ();
2920 if (t
->can_create_inferior ())
2924 /* Otherwise, use the default run target. */
2925 return find_default_run_target ("run");
2929 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2934 /* Implement the "info proc" command. */
2937 target_info_proc (const char *args
, enum info_proc_what what
)
2939 struct target_ops
*t
;
2941 /* If we're already connected to something that can get us OS
2942 related data, use it. Otherwise, try using the native
2944 t
= find_target_at (process_stratum
);
2946 t
= find_default_run_target (NULL
);
2948 for (; t
!= NULL
; t
= t
->beneath ())
2950 if (t
->info_proc (args
, what
))
2953 fprintf_unfiltered (gdb_stdlog
,
2954 "target_info_proc (\"%s\", %d)\n", args
, what
);
2964 find_default_supports_disable_randomization (struct target_ops
*self
)
2966 struct target_ops
*t
;
2968 t
= find_default_run_target (NULL
);
2970 return t
->supports_disable_randomization ();
2975 target_supports_disable_randomization (void)
2977 return current_inferior ()->top_target ()->supports_disable_randomization ();
2980 /* See target/target.h. */
2983 target_supports_multi_process (void)
2985 return current_inferior ()->top_target ()->supports_multi_process ();
2990 gdb::optional
<gdb::char_vector
>
2991 target_get_osdata (const char *type
)
2993 struct target_ops
*t
;
2995 /* If we're already connected to something that can get us OS
2996 related data, use it. Otherwise, try using the native
2998 t
= find_target_at (process_stratum
);
3000 t
= find_default_run_target ("get OS data");
3005 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3008 /* Determine the current address space of thread PTID. */
3010 struct address_space
*
3011 target_thread_address_space (ptid_t ptid
)
3013 struct address_space
*aspace
;
3015 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3016 gdb_assert (aspace
!= NULL
);
3024 target_ops::beneath () const
3026 return current_inferior ()->find_target_beneath (this);
3030 target_ops::close ()
3035 target_ops::can_attach ()
3041 target_ops::attach (const char *, int)
3043 gdb_assert_not_reached ("target_ops::attach called");
3047 target_ops::can_create_inferior ()
3053 target_ops::create_inferior (const char *, const std::string
&,
3056 gdb_assert_not_reached ("target_ops::create_inferior called");
3060 target_ops::can_run ()
3068 for (target_ops
*t
= current_inferior ()->top_target ();
3079 /* Target file operations. */
3081 static struct target_ops
*
3082 default_fileio_target (void)
3084 struct target_ops
*t
;
3086 /* If we're already connected to something that can perform
3087 file I/O, use it. Otherwise, try using the native target. */
3088 t
= find_target_at (process_stratum
);
3091 return find_default_run_target ("file I/O");
3094 /* File handle for target file operations. */
3098 /* The target on which this file is open. NULL if the target is
3099 meanwhile closed while the handle is open. */
3102 /* The file descriptor on the target. */
3105 /* Check whether this fileio_fh_t represents a closed file. */
3108 return target_fd
< 0;
3112 /* Vector of currently open file handles. The value returned by
3113 target_fileio_open and passed as the FD argument to other
3114 target_fileio_* functions is an index into this vector. This
3115 vector's entries are never freed; instead, files are marked as
3116 closed, and the handle becomes available for reuse. */
3117 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3119 /* Index into fileio_fhandles of the lowest handle that might be
3120 closed. This permits handle reuse without searching the whole
3121 list each time a new file is opened. */
3122 static int lowest_closed_fd
;
3124 /* Invalidate the target associated with open handles that were open
3125 on target TARG, since we're about to close (and maybe destroy) the
3126 target. The handles remain open from the client's perspective, but
3127 trying to do anything with them other than closing them will fail
3131 fileio_handles_invalidate_target (target_ops
*targ
)
3133 for (fileio_fh_t
&fh
: fileio_fhandles
)
3134 if (fh
.target
== targ
)
3138 /* Acquire a target fileio file descriptor. */
3141 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3143 /* Search for closed handles to reuse. */
3144 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3146 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3148 if (fh
.is_closed ())
3152 /* Push a new handle if no closed handles were found. */
3153 if (lowest_closed_fd
== fileio_fhandles
.size ())
3154 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3156 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3158 /* Should no longer be marked closed. */
3159 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3161 /* Return its index, and start the next lookup at
3163 return lowest_closed_fd
++;
3166 /* Release a target fileio file descriptor. */
3169 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3172 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3175 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3177 static fileio_fh_t
*
3178 fileio_fd_to_fh (int fd
)
3180 return &fileio_fhandles
[fd
];
3184 /* Default implementations of file i/o methods. We don't want these
3185 to delegate automatically, because we need to know which target
3186 supported the method, in order to call it directly from within
3187 pread/pwrite, etc. */
3190 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3191 int flags
, int mode
, int warn_if_slow
,
3194 *target_errno
= FILEIO_ENOSYS
;
3199 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3200 ULONGEST offset
, int *target_errno
)
3202 *target_errno
= FILEIO_ENOSYS
;
3207 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3208 ULONGEST offset
, int *target_errno
)
3210 *target_errno
= FILEIO_ENOSYS
;
3215 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3217 *target_errno
= FILEIO_ENOSYS
;
3222 target_ops::fileio_close (int fd
, int *target_errno
)
3224 *target_errno
= FILEIO_ENOSYS
;
3229 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3232 *target_errno
= FILEIO_ENOSYS
;
3236 gdb::optional
<std::string
>
3237 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3240 *target_errno
= FILEIO_ENOSYS
;
3247 target_fileio_open (struct inferior
*inf
, const char *filename
,
3248 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3250 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3252 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3253 warn_if_slow
, target_errno
);
3255 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3261 fd
= acquire_fileio_fd (t
, fd
);
3264 fprintf_unfiltered (gdb_stdlog
,
3265 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3267 inf
== NULL
? 0 : inf
->num
,
3268 filename
, flags
, mode
,
3270 fd
!= -1 ? 0 : *target_errno
);
3274 *target_errno
= FILEIO_ENOSYS
;
3281 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3282 ULONGEST offset
, int *target_errno
)
3284 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3287 if (fh
->is_closed ())
3288 *target_errno
= EBADF
;
3289 else if (fh
->target
== NULL
)
3290 *target_errno
= EIO
;
3292 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3293 len
, offset
, target_errno
);
3296 fprintf_unfiltered (gdb_stdlog
,
3297 "target_fileio_pwrite (%d,...,%d,%s) "
3299 fd
, len
, pulongest (offset
),
3300 ret
, ret
!= -1 ? 0 : *target_errno
);
3307 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3308 ULONGEST offset
, int *target_errno
)
3310 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3313 if (fh
->is_closed ())
3314 *target_errno
= EBADF
;
3315 else if (fh
->target
== NULL
)
3316 *target_errno
= EIO
;
3318 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3319 len
, offset
, target_errno
);
3322 fprintf_unfiltered (gdb_stdlog
,
3323 "target_fileio_pread (%d,...,%d,%s) "
3325 fd
, len
, pulongest (offset
),
3326 ret
, ret
!= -1 ? 0 : *target_errno
);
3333 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3335 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3338 if (fh
->is_closed ())
3339 *target_errno
= EBADF
;
3340 else if (fh
->target
== NULL
)
3341 *target_errno
= EIO
;
3343 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3346 fprintf_unfiltered (gdb_stdlog
,
3347 "target_fileio_fstat (%d) = %d (%d)\n",
3348 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3355 target_fileio_close (int fd
, int *target_errno
)
3357 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3360 if (fh
->is_closed ())
3361 *target_errno
= EBADF
;
3364 if (fh
->target
!= NULL
)
3365 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3369 release_fileio_fd (fd
, fh
);
3373 fprintf_unfiltered (gdb_stdlog
,
3374 "target_fileio_close (%d) = %d (%d)\n",
3375 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3382 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3385 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3387 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3389 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3393 fprintf_unfiltered (gdb_stdlog
,
3394 "target_fileio_unlink (%d,%s)"
3396 inf
== NULL
? 0 : inf
->num
, filename
,
3397 ret
, ret
!= -1 ? 0 : *target_errno
);
3401 *target_errno
= FILEIO_ENOSYS
;
3407 gdb::optional
<std::string
>
3408 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3411 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3413 gdb::optional
<std::string
> ret
3414 = t
->fileio_readlink (inf
, filename
, target_errno
);
3416 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3420 fprintf_unfiltered (gdb_stdlog
,
3421 "target_fileio_readlink (%d,%s)"
3423 inf
== NULL
? 0 : inf
->num
,
3424 filename
, ret
? ret
->c_str () : "(nil)",
3425 ret
? 0 : *target_errno
);
3429 *target_errno
= FILEIO_ENOSYS
;
3433 /* Like scoped_fd, but specific to target fileio. */
3435 class scoped_target_fd
3438 explicit scoped_target_fd (int fd
) noexcept
3443 ~scoped_target_fd ()
3449 target_fileio_close (m_fd
, &target_errno
);
3453 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3455 int get () const noexcept
3464 /* Read target file FILENAME, in the filesystem as seen by INF. If
3465 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3466 remote targets, the remote stub). Store the result in *BUF_P and
3467 return the size of the transferred data. PADDING additional bytes
3468 are available in *BUF_P. This is a helper function for
3469 target_fileio_read_alloc; see the declaration of that function for
3470 more information. */
3473 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3474 gdb_byte
**buf_p
, int padding
)
3476 size_t buf_alloc
, buf_pos
;
3481 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3482 0700, false, &target_errno
));
3483 if (fd
.get () == -1)
3486 /* Start by reading up to 4K at a time. The target will throttle
3487 this number down if necessary. */
3489 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3493 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3494 buf_alloc
- buf_pos
- padding
, buf_pos
,
3498 /* An error occurred. */
3504 /* Read all there was. */
3514 /* If the buffer is filling up, expand it. */
3515 if (buf_alloc
< buf_pos
* 2)
3518 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3528 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3531 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3536 gdb::unique_xmalloc_ptr
<char>
3537 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3541 LONGEST i
, transferred
;
3543 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3544 bufstr
= (char *) buffer
;
3546 if (transferred
< 0)
3547 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3549 if (transferred
== 0)
3550 return make_unique_xstrdup ("");
3552 bufstr
[transferred
] = 0;
3554 /* Check for embedded NUL bytes; but allow trailing NULs. */
3555 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3558 warning (_("target file %s "
3559 "contained unexpected null characters"),
3564 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3569 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3570 CORE_ADDR addr
, int len
)
3572 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3576 default_watchpoint_addr_within_range (struct target_ops
*target
,
3578 CORE_ADDR start
, int length
)
3580 return addr
>= start
&& addr
< start
+ length
;
3586 target_stack::find_beneath (const target_ops
*t
) const
3588 /* Look for a non-empty slot at stratum levels beneath T's. */
3589 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3590 if (m_stack
[stratum
] != NULL
)
3591 return m_stack
[stratum
];
3599 find_target_at (enum strata stratum
)
3601 return current_inferior ()->target_at (stratum
);
3609 target_announce_detach (int from_tty
)
3612 const char *exec_file
;
3617 exec_file
= get_exec_file (0);
3618 if (exec_file
== NULL
)
3621 pid
= inferior_ptid
.pid ();
3622 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3623 target_pid_to_str (ptid_t (pid
)).c_str ());
3626 /* The inferior process has died. Long live the inferior! */
3629 generic_mourn_inferior (void)
3631 inferior
*inf
= current_inferior ();
3633 switch_to_no_thread ();
3635 /* Mark breakpoints uninserted in case something tries to delete a
3636 breakpoint while we delete the inferior's threads (which would
3637 fail, since the inferior is long gone). */
3638 mark_breakpoints_out ();
3641 exit_inferior (inf
);
3643 /* Note this wipes step-resume breakpoints, so needs to be done
3644 after exit_inferior, which ends up referencing the step-resume
3645 breakpoints through clear_thread_inferior_resources. */
3646 breakpoint_init_inferior (inf_exited
);
3648 registers_changed ();
3650 reopen_exec_file ();
3651 reinit_frame_cache ();
3653 if (deprecated_detach_hook
)
3654 deprecated_detach_hook ();
3657 /* Convert a normal process ID to a string. Returns the string in a
3661 normal_pid_to_str (ptid_t ptid
)
3663 return string_printf ("process %d", ptid
.pid ());
3667 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3669 return normal_pid_to_str (ptid
);
3672 /* Error-catcher for target_find_memory_regions. */
3674 dummy_find_memory_regions (struct target_ops
*self
,
3675 find_memory_region_ftype ignore1
, void *ignore2
)
3677 error (_("Command not implemented for this target."));
3681 /* Error-catcher for target_make_corefile_notes. */
3682 static gdb::unique_xmalloc_ptr
<char>
3683 dummy_make_corefile_notes (struct target_ops
*self
,
3684 bfd
*ignore1
, int *ignore2
)
3686 error (_("Command not implemented for this target."));
3690 #include "target-delegates.c"
3692 /* The initial current target, so that there is always a semi-valid
3695 static dummy_target the_dummy_target
;
3702 return &the_dummy_target
;
3705 static const target_info dummy_target_info
= {
3712 dummy_target::stratum () const
3714 return dummy_stratum
;
3718 debug_target::stratum () const
3720 return debug_stratum
;
3724 dummy_target::info () const
3726 return dummy_target_info
;
3730 debug_target::info () const
3732 return beneath ()->info ();
3738 target_close (struct target_ops
*targ
)
3740 for (inferior
*inf
: all_inferiors ())
3741 gdb_assert (!inf
->target_is_pushed (targ
));
3743 fileio_handles_invalidate_target (targ
);
3748 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3752 target_thread_alive (ptid_t ptid
)
3754 return current_inferior ()->top_target ()->thread_alive (ptid
);
3758 target_update_thread_list (void)
3760 current_inferior ()->top_target ()->update_thread_list ();
3764 target_stop (ptid_t ptid
)
3766 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3768 gdb_assert (!proc_target
->commit_resumed_state
);
3772 warning (_("May not interrupt or stop the target, ignoring attempt"));
3776 current_inferior ()->top_target ()->stop (ptid
);
3784 warning (_("May not interrupt or stop the target, ignoring attempt"));
3788 current_inferior ()->top_target ()->interrupt ();
3794 target_pass_ctrlc (void)
3796 /* Pass the Ctrl-C to the first target that has a thread
3798 for (inferior
*inf
: all_inferiors ())
3800 target_ops
*proc_target
= inf
->process_target ();
3801 if (proc_target
== NULL
)
3804 for (thread_info
*thr
: inf
->non_exited_threads ())
3806 /* A thread can be THREAD_STOPPED and executing, while
3807 running an infcall. */
3808 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3810 /* We can get here quite deep in target layers. Avoid
3811 switching thread context or anything that would
3812 communicate with the target (e.g., to fetch
3813 registers), or flushing e.g., the frame cache. We
3814 just switch inferior in order to be able to call
3815 through the target_stack. */
3816 scoped_restore_current_inferior restore_inferior
;
3817 set_current_inferior (inf
);
3818 current_inferior ()->top_target ()->pass_ctrlc ();
3828 default_target_pass_ctrlc (struct target_ops
*ops
)
3830 target_interrupt ();
3833 /* See target/target.h. */
3836 target_stop_and_wait (ptid_t ptid
)
3838 struct target_waitstatus status
;
3839 bool was_non_stop
= non_stop
;
3844 memset (&status
, 0, sizeof (status
));
3845 target_wait (ptid
, &status
, 0);
3847 non_stop
= was_non_stop
;
3850 /* See target/target.h. */
3853 target_continue_no_signal (ptid_t ptid
)
3855 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3858 /* See target/target.h. */
3861 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3863 target_resume (ptid
, 0, signal
);
3866 /* Concatenate ELEM to LIST, a comma-separated list. */
3869 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3871 if (!list
->empty ())
3872 list
->append (", ");
3874 list
->append (elem
);
3877 /* Helper for target_options_to_string. If OPT is present in
3878 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3879 OPT is removed from TARGET_OPTIONS. */
3882 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3883 target_wait_flag opt
, const char *opt_str
)
3885 if ((*target_options
& opt
) != 0)
3887 str_comma_list_concat_elem (ret
, opt_str
);
3888 *target_options
&= ~opt
;
3895 target_options_to_string (target_wait_flags target_options
)
3899 #define DO_TARG_OPTION(OPT) \
3900 do_option (&target_options, &ret, OPT, #OPT)
3902 DO_TARG_OPTION (TARGET_WNOHANG
);
3904 if (target_options
!= 0)
3905 str_comma_list_concat_elem (&ret
, "unknown???");
3911 target_fetch_registers (struct regcache
*regcache
, int regno
)
3913 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3915 regcache
->debug_print_register ("target_fetch_registers", regno
);
3919 target_store_registers (struct regcache
*regcache
, int regno
)
3921 if (!may_write_registers
)
3922 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3924 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3927 regcache
->debug_print_register ("target_store_registers", regno
);
3932 target_core_of_thread (ptid_t ptid
)
3934 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3938 simple_verify_memory (struct target_ops
*ops
,
3939 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3941 LONGEST total_xfered
= 0;
3943 while (total_xfered
< size
)
3945 ULONGEST xfered_len
;
3946 enum target_xfer_status status
;
3948 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3950 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3951 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3953 if (status
== TARGET_XFER_OK
3954 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3956 total_xfered
+= xfered_len
;
3965 /* Default implementation of memory verification. */
3968 default_verify_memory (struct target_ops
*self
,
3969 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3971 /* Start over from the top of the target stack. */
3972 return simple_verify_memory (current_inferior ()->top_target (),
3973 data
, memaddr
, size
);
3977 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3979 target_ops
*target
= current_inferior ()->top_target ();
3981 return target
->verify_memory (data
, memaddr
, size
);
3984 /* The documentation for this function is in its prototype declaration in
3988 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3989 enum target_hw_bp_type rw
)
3991 target_ops
*target
= current_inferior ()->top_target ();
3993 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
3996 /* The documentation for this function is in its prototype declaration in
4000 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4001 enum target_hw_bp_type rw
)
4003 target_ops
*target
= current_inferior ()->top_target ();
4005 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4008 /* The documentation for this function is in its prototype declaration
4012 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4014 target_ops
*target
= current_inferior ()->top_target ();
4016 return target
->masked_watch_num_registers (addr
, mask
);
4019 /* The documentation for this function is in its prototype declaration
4023 target_ranged_break_num_registers (void)
4025 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4030 struct btrace_target_info
*
4031 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
4033 return current_inferior ()->top_target ()->enable_btrace (ptid
, conf
);
4039 target_disable_btrace (struct btrace_target_info
*btinfo
)
4041 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4047 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4049 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4055 target_read_btrace (struct btrace_data
*btrace
,
4056 struct btrace_target_info
*btinfo
,
4057 enum btrace_read_type type
)
4059 target_ops
*target
= current_inferior ()->top_target ();
4061 return target
->read_btrace (btrace
, btinfo
, type
);
4066 const struct btrace_config
*
4067 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4069 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4075 target_stop_recording (void)
4077 current_inferior ()->top_target ()->stop_recording ();
4083 target_save_record (const char *filename
)
4085 current_inferior ()->top_target ()->save_record (filename
);
4091 target_supports_delete_record ()
4093 return current_inferior ()->top_target ()->supports_delete_record ();
4099 target_delete_record (void)
4101 current_inferior ()->top_target ()->delete_record ();
4107 target_record_method (ptid_t ptid
)
4109 return current_inferior ()->top_target ()->record_method (ptid
);
4115 target_record_is_replaying (ptid_t ptid
)
4117 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4123 target_record_will_replay (ptid_t ptid
, int dir
)
4125 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4131 target_record_stop_replaying (void)
4133 current_inferior ()->top_target ()->record_stop_replaying ();
4139 target_goto_record_begin (void)
4141 current_inferior ()->top_target ()->goto_record_begin ();
4147 target_goto_record_end (void)
4149 current_inferior ()->top_target ()->goto_record_end ();
4155 target_goto_record (ULONGEST insn
)
4157 current_inferior ()->top_target ()->goto_record (insn
);
4163 target_insn_history (int size
, gdb_disassembly_flags flags
)
4165 current_inferior ()->top_target ()->insn_history (size
, flags
);
4171 target_insn_history_from (ULONGEST from
, int size
,
4172 gdb_disassembly_flags flags
)
4174 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4180 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4181 gdb_disassembly_flags flags
)
4183 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4189 target_call_history (int size
, record_print_flags flags
)
4191 current_inferior ()->top_target ()->call_history (size
, flags
);
4197 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4199 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4205 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4207 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4212 const struct frame_unwind
*
4213 target_get_unwinder (void)
4215 return current_inferior ()->top_target ()->get_unwinder ();
4220 const struct frame_unwind
*
4221 target_get_tailcall_unwinder (void)
4223 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4229 target_prepare_to_generate_core (void)
4231 current_inferior ()->top_target ()->prepare_to_generate_core ();
4237 target_done_generating_core (void)
4239 current_inferior ()->top_target ()->done_generating_core ();
4244 static char targ_desc
[] =
4245 "Names of targets and files being debugged.\nShows the entire \
4246 stack of targets currently in use (including the exec-file,\n\
4247 core-file, and process, if any), as well as the symbol file name.";
4250 default_rcmd (struct target_ops
*self
, const char *command
,
4251 struct ui_file
*output
)
4253 error (_("\"monitor\" command not supported by this target."));
4257 do_monitor_command (const char *cmd
, int from_tty
)
4259 target_rcmd (cmd
, gdb_stdtarg
);
4262 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4266 flash_erase_command (const char *cmd
, int from_tty
)
4268 /* Used to communicate termination of flash operations to the target. */
4269 bool found_flash_region
= false;
4270 struct gdbarch
*gdbarch
= target_gdbarch ();
4272 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4274 /* Iterate over all memory regions. */
4275 for (const mem_region
&m
: mem_regions
)
4277 /* Is this a flash memory region? */
4278 if (m
.attrib
.mode
== MEM_FLASH
)
4280 found_flash_region
= true;
4281 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4283 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4285 current_uiout
->message (_("Erasing flash memory region at address "));
4286 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4287 current_uiout
->message (", size = ");
4288 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4289 current_uiout
->message ("\n");
4293 /* Did we do any flash operations? If so, we need to finalize them. */
4294 if (found_flash_region
)
4295 target_flash_done ();
4297 current_uiout
->message (_("No flash memory regions found.\n"));
4300 /* Print the name of each layers of our target stack. */
4303 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4305 printf_filtered (_("The current target stack is:\n"));
4307 for (target_ops
*t
= current_inferior ()->top_target ();
4311 if (t
->stratum () == debug_stratum
)
4313 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
4320 target_async (int enable
)
4322 infrun_async (enable
);
4323 current_inferior ()->top_target ()->async (enable
);
4329 target_thread_events (int enable
)
4331 current_inferior ()->top_target ()->thread_events (enable
);
4334 /* Controls if targets can report that they can/are async. This is
4335 just for maintainers to use when debugging gdb. */
4336 bool target_async_permitted
= true;
4338 /* The set command writes to this variable. If the inferior is
4339 executing, target_async_permitted is *not* updated. */
4340 static bool target_async_permitted_1
= true;
4343 maint_set_target_async_command (const char *args
, int from_tty
,
4344 struct cmd_list_element
*c
)
4346 if (have_live_inferiors ())
4348 target_async_permitted_1
= target_async_permitted
;
4349 error (_("Cannot change this setting while the inferior is running."));
4352 target_async_permitted
= target_async_permitted_1
;
4356 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
4357 struct cmd_list_element
*c
,
4360 fprintf_filtered (file
,
4361 _("Controlling the inferior in "
4362 "asynchronous mode is %s.\n"), value
);
4365 /* Return true if the target operates in non-stop mode even with "set
4369 target_always_non_stop_p (void)
4371 return current_inferior ()->top_target ()->always_non_stop_p ();
4377 target_is_non_stop_p ()
4380 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4381 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4382 && target_always_non_stop_p ()))
4383 && target_can_async_p ());
4389 exists_non_stop_target ()
4391 if (target_is_non_stop_p ())
4394 scoped_restore_current_thread restore_thread
;
4396 for (inferior
*inf
: all_inferiors ())
4398 switch_to_inferior_no_thread (inf
);
4399 if (target_is_non_stop_p ())
4406 /* Controls if targets can report that they always run in non-stop
4407 mode. This is just for maintainers to use when debugging gdb. */
4408 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4410 /* The set command writes to this variable. If the inferior is
4411 executing, target_non_stop_enabled is *not* updated. */
4412 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
4414 /* Implementation of "maint set target-non-stop". */
4417 maint_set_target_non_stop_command (const char *args
, int from_tty
,
4418 struct cmd_list_element
*c
)
4420 if (have_live_inferiors ())
4422 target_non_stop_enabled_1
= target_non_stop_enabled
;
4423 error (_("Cannot change this setting while the inferior is running."));
4426 target_non_stop_enabled
= target_non_stop_enabled_1
;
4429 /* Implementation of "maint show target-non-stop". */
4432 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4433 struct cmd_list_element
*c
,
4436 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4437 fprintf_filtered (file
,
4438 _("Whether the target is always in non-stop mode "
4439 "is %s (currently %s).\n"), value
,
4440 target_always_non_stop_p () ? "on" : "off");
4442 fprintf_filtered (file
,
4443 _("Whether the target is always in non-stop mode "
4444 "is %s.\n"), value
);
4447 /* Temporary copies of permission settings. */
4449 static bool may_write_registers_1
= true;
4450 static bool may_write_memory_1
= true;
4451 static bool may_insert_breakpoints_1
= true;
4452 static bool may_insert_tracepoints_1
= true;
4453 static bool may_insert_fast_tracepoints_1
= true;
4454 static bool may_stop_1
= true;
4456 /* Make the user-set values match the real values again. */
4459 update_target_permissions (void)
4461 may_write_registers_1
= may_write_registers
;
4462 may_write_memory_1
= may_write_memory
;
4463 may_insert_breakpoints_1
= may_insert_breakpoints
;
4464 may_insert_tracepoints_1
= may_insert_tracepoints
;
4465 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4466 may_stop_1
= may_stop
;
4469 /* The one function handles (most of) the permission flags in the same
4473 set_target_permissions (const char *args
, int from_tty
,
4474 struct cmd_list_element
*c
)
4476 if (target_has_execution ())
4478 update_target_permissions ();
4479 error (_("Cannot change this setting while the inferior is running."));
4482 /* Make the real values match the user-changed values. */
4483 may_write_registers
= may_write_registers_1
;
4484 may_insert_breakpoints
= may_insert_breakpoints_1
;
4485 may_insert_tracepoints
= may_insert_tracepoints_1
;
4486 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4487 may_stop
= may_stop_1
;
4488 update_observer_mode ();
4491 /* Set memory write permission independently of observer mode. */
4494 set_write_memory_permission (const char *args
, int from_tty
,
4495 struct cmd_list_element
*c
)
4497 /* Make the real values match the user-changed values. */
4498 may_write_memory
= may_write_memory_1
;
4499 update_observer_mode ();
4502 void _initialize_target ();
4505 _initialize_target ()
4507 the_debug_target
= new debug_target ();
4509 add_info ("target", info_target_command
, targ_desc
);
4510 add_info ("files", info_target_command
, targ_desc
);
4512 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4513 Set target debugging."), _("\
4514 Show target debugging."), _("\
4515 When non-zero, target debugging is enabled. Higher numbers are more\n\
4519 &setdebuglist
, &showdebuglist
);
4521 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4522 &trust_readonly
, _("\
4523 Set mode for reading from readonly sections."), _("\
4524 Show mode for reading from readonly sections."), _("\
4525 When this mode is on, memory reads from readonly sections (such as .text)\n\
4526 will be read from the object file instead of from the target. This will\n\
4527 result in significant performance improvement for remote targets."),
4529 show_trust_readonly
,
4530 &setlist
, &showlist
);
4532 add_com ("monitor", class_obscure
, do_monitor_command
,
4533 _("Send a command to the remote monitor (remote targets only)."));
4535 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4536 _("Print the name of each layer of the internal target stack."),
4537 &maintenanceprintlist
);
4539 add_setshow_boolean_cmd ("target-async", no_class
,
4540 &target_async_permitted_1
, _("\
4541 Set whether gdb controls the inferior in asynchronous mode."), _("\
4542 Show whether gdb controls the inferior in asynchronous mode."), _("\
4543 Tells gdb whether to control the inferior in asynchronous mode."),
4544 maint_set_target_async_command
,
4545 maint_show_target_async_command
,
4546 &maintenance_set_cmdlist
,
4547 &maintenance_show_cmdlist
);
4549 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4550 &target_non_stop_enabled_1
, _("\
4551 Set whether gdb always controls the inferior in non-stop mode."), _("\
4552 Show whether gdb always controls the inferior in non-stop mode."), _("\
4553 Tells gdb whether to control the inferior in non-stop mode."),
4554 maint_set_target_non_stop_command
,
4555 maint_show_target_non_stop_command
,
4556 &maintenance_set_cmdlist
,
4557 &maintenance_show_cmdlist
);
4559 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4560 &may_write_registers_1
, _("\
4561 Set permission to write into registers."), _("\
4562 Show permission to write into registers."), _("\
4563 When this permission is on, GDB may write into the target's registers.\n\
4564 Otherwise, any sort of write attempt will result in an error."),
4565 set_target_permissions
, NULL
,
4566 &setlist
, &showlist
);
4568 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4569 &may_write_memory_1
, _("\
4570 Set permission to write into target memory."), _("\
4571 Show permission to write into target memory."), _("\
4572 When this permission is on, GDB may write into the target's memory.\n\
4573 Otherwise, any sort of write attempt will result in an error."),
4574 set_write_memory_permission
, NULL
,
4575 &setlist
, &showlist
);
4577 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4578 &may_insert_breakpoints_1
, _("\
4579 Set permission to insert breakpoints in the target."), _("\
4580 Show permission to insert breakpoints in the target."), _("\
4581 When this permission is on, GDB may insert breakpoints in the program.\n\
4582 Otherwise, any sort of insertion attempt will result in an error."),
4583 set_target_permissions
, NULL
,
4584 &setlist
, &showlist
);
4586 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4587 &may_insert_tracepoints_1
, _("\
4588 Set permission to insert tracepoints in the target."), _("\
4589 Show permission to insert tracepoints in the target."), _("\
4590 When this permission is on, GDB may insert tracepoints in the program.\n\
4591 Otherwise, any sort of insertion attempt will result in an error."),
4592 set_target_permissions
, NULL
,
4593 &setlist
, &showlist
);
4595 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4596 &may_insert_fast_tracepoints_1
, _("\
4597 Set permission to insert fast tracepoints in the target."), _("\
4598 Show permission to insert fast tracepoints in the target."), _("\
4599 When this permission is on, GDB may insert fast tracepoints.\n\
4600 Otherwise, any sort of insertion attempt will result in an error."),
4601 set_target_permissions
, NULL
,
4602 &setlist
, &showlist
);
4604 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4606 Set permission to interrupt or signal the target."), _("\
4607 Show permission to interrupt or signal the target."), _("\
4608 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4609 Otherwise, any attempt to interrupt or stop will be ignored."),
4610 set_target_permissions
, NULL
,
4611 &setlist
, &showlist
);
4613 add_com ("flash-erase", no_class
, flash_erase_command
,
4614 _("Erase all flash memory regions."));
4616 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4617 &auto_connect_native_target
, _("\
4618 Set whether GDB may automatically connect to the native target."), _("\
4619 Show whether GDB may automatically connect to the native target."), _("\
4620 When on, and GDB is not connected to a target yet, GDB\n\
4621 attempts \"run\" and other commands with the native target."),
4622 NULL
, show_auto_connect_native_target
,
4623 &setlist
, &showlist
);