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
,
70 long lwp
, ULONGEST tid
);
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 target_can_async_p (current_inferior ()->top_target ());
400 target_can_async_p (struct target_ops
*target
)
402 return target
->can_async_p ();
410 return current_inferior ()->top_target ()->is_async_p ();
414 target_execution_direction ()
416 return current_inferior ()->top_target ()->execution_direction ();
422 target_extra_thread_info (thread_info
*tp
)
424 return current_inferior ()->top_target ()->extra_thread_info (tp
);
430 target_pid_to_exec_file (int pid
)
432 return current_inferior ()->top_target ()->pid_to_exec_file (pid
);
438 target_thread_architecture (ptid_t ptid
)
440 return current_inferior ()->top_target ()->thread_architecture (ptid
);
446 target_find_memory_regions (find_memory_region_ftype func
, void *data
)
448 return current_inferior ()->top_target ()->find_memory_regions (func
, data
);
453 gdb::unique_xmalloc_ptr
<char>
454 target_make_corefile_notes (bfd
*bfd
, int *size_p
)
456 return current_inferior ()->top_target ()->make_corefile_notes (bfd
, size_p
);
460 target_get_bookmark (const char *args
, int from_tty
)
462 return current_inferior ()->top_target ()->get_bookmark (args
, from_tty
);
466 target_goto_bookmark (const gdb_byte
*arg
, int from_tty
)
468 return current_inferior ()->top_target ()->goto_bookmark (arg
, from_tty
);
474 target_stopped_by_watchpoint ()
476 return current_inferior ()->top_target ()->stopped_by_watchpoint ();
482 target_stopped_by_sw_breakpoint ()
484 return current_inferior ()->top_target ()->stopped_by_sw_breakpoint ();
488 target_supports_stopped_by_sw_breakpoint ()
490 target_ops
*target
= current_inferior ()->top_target ();
492 return target
->supports_stopped_by_sw_breakpoint ();
496 target_stopped_by_hw_breakpoint ()
498 return current_inferior ()->top_target ()->stopped_by_hw_breakpoint ();
502 target_supports_stopped_by_hw_breakpoint ()
504 target_ops
*target
= current_inferior ()->top_target ();
506 return target
->supports_stopped_by_hw_breakpoint ();
512 target_have_steppable_watchpoint ()
514 return current_inferior ()->top_target ()->have_steppable_watchpoint ();
520 target_can_use_hardware_watchpoint (bptype type
, int cnt
, int othertype
)
522 target_ops
*target
= current_inferior ()->top_target ();
524 return target
->can_use_hw_breakpoint (type
, cnt
, othertype
);
530 target_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
532 target_ops
*target
= current_inferior ()->top_target ();
534 return target
->region_ok_for_hw_watchpoint (addr
, len
);
539 target_can_do_single_step ()
541 return current_inferior ()->top_target ()->can_do_single_step ();
547 target_insert_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
550 target_ops
*target
= current_inferior ()->top_target ();
552 return target
->insert_watchpoint (addr
, len
, type
, cond
);
558 target_remove_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
561 target_ops
*target
= current_inferior ()->top_target ();
563 return target
->remove_watchpoint (addr
, len
, type
, cond
);
569 target_insert_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
571 target_ops
*target
= current_inferior ()->top_target ();
573 return target
->insert_hw_breakpoint (gdbarch
, bp_tgt
);
579 target_remove_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
581 target_ops
*target
= current_inferior ()->top_target ();
583 return target
->remove_hw_breakpoint (gdbarch
, bp_tgt
);
589 target_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int type
,
592 target_ops
*target
= current_inferior ()->top_target ();
594 return target
->can_accel_watchpoint_condition (addr
, len
, type
, cond
);
600 target_can_execute_reverse ()
602 return current_inferior ()->top_target ()->can_execute_reverse ();
606 target_get_ada_task_ptid (long lwp
, ULONGEST tid
)
608 return current_inferior ()->top_target ()->get_ada_task_ptid (lwp
, tid
);
612 target_filesystem_is_local ()
614 return current_inferior ()->top_target ()->filesystem_is_local ();
620 return current_inferior ()->top_target ()->trace_init ();
624 target_download_tracepoint (bp_location
*location
)
626 return current_inferior ()->top_target ()->download_tracepoint (location
);
630 target_can_download_tracepoint ()
632 return current_inferior ()->top_target ()->can_download_tracepoint ();
636 target_download_trace_state_variable (const trace_state_variable
&tsv
)
638 target_ops
*target
= current_inferior ()->top_target ();
640 return target
->download_trace_state_variable (tsv
);
644 target_enable_tracepoint (bp_location
*loc
)
646 return current_inferior ()->top_target ()->enable_tracepoint (loc
);
650 target_disable_tracepoint (bp_location
*loc
)
652 return current_inferior ()->top_target ()->disable_tracepoint (loc
);
656 target_trace_start ()
658 return current_inferior ()->top_target ()->trace_start ();
662 target_trace_set_readonly_regions ()
664 return current_inferior ()->top_target ()->trace_set_readonly_regions ();
668 target_get_trace_status (trace_status
*ts
)
670 return current_inferior ()->top_target ()->get_trace_status (ts
);
674 target_get_tracepoint_status (breakpoint
*tp
, uploaded_tp
*utp
)
676 return current_inferior ()->top_target ()->get_tracepoint_status (tp
, utp
);
682 return current_inferior ()->top_target ()->trace_stop ();
686 target_trace_find (trace_find_type type
, int num
,
687 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
)
689 target_ops
*target
= current_inferior ()->top_target ();
691 return target
->trace_find (type
, num
, addr1
, addr2
, tpp
);
695 target_get_trace_state_variable_value (int tsv
, LONGEST
*val
)
697 target_ops
*target
= current_inferior ()->top_target ();
699 return target
->get_trace_state_variable_value (tsv
, val
);
703 target_save_trace_data (const char *filename
)
705 return current_inferior ()->top_target ()->save_trace_data (filename
);
709 target_upload_tracepoints (uploaded_tp
**utpp
)
711 return current_inferior ()->top_target ()->upload_tracepoints (utpp
);
715 target_upload_trace_state_variables (uploaded_tsv
**utsvp
)
717 target_ops
*target
= current_inferior ()->top_target ();
719 return target
->upload_trace_state_variables (utsvp
);
723 target_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
725 target_ops
*target
= current_inferior ()->top_target ();
727 return target
->get_raw_trace_data (buf
, offset
, len
);
731 target_get_min_fast_tracepoint_insn_len ()
733 target_ops
*target
= current_inferior ()->top_target ();
735 return target
->get_min_fast_tracepoint_insn_len ();
739 target_set_disconnected_tracing (int val
)
741 return current_inferior ()->top_target ()->set_disconnected_tracing (val
);
745 target_set_circular_trace_buffer (int val
)
747 return current_inferior ()->top_target ()->set_circular_trace_buffer (val
);
751 target_set_trace_buffer_size (LONGEST val
)
753 return current_inferior ()->top_target ()->set_trace_buffer_size (val
);
757 target_set_trace_notes (const char *user
, const char *notes
,
758 const char *stopnotes
)
760 target_ops
*target
= current_inferior ()->top_target ();
762 return target
->set_trace_notes (user
, notes
, stopnotes
);
766 target_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
768 return current_inferior ()->top_target ()->get_tib_address (ptid
, addr
);
772 target_set_permissions ()
774 return current_inferior ()->top_target ()->set_permissions ();
778 target_static_tracepoint_marker_at (CORE_ADDR addr
,
779 static_tracepoint_marker
*marker
)
781 target_ops
*target
= current_inferior ()->top_target ();
783 return target
->static_tracepoint_marker_at (addr
, marker
);
786 std::vector
<static_tracepoint_marker
>
787 target_static_tracepoint_markers_by_strid (const char *marker_id
)
789 target_ops
*target
= current_inferior ()->top_target ();
791 return target
->static_tracepoint_markers_by_strid (marker_id
);
795 target_traceframe_info ()
797 return current_inferior ()->top_target ()->traceframe_info ();
801 target_use_agent (bool use
)
803 return current_inferior ()->top_target ()->use_agent (use
);
807 target_can_use_agent ()
809 return current_inferior ()->top_target ()->can_use_agent ();
813 target_augmented_libraries_svr4_read ()
815 return current_inferior ()->top_target ()->augmented_libraries_svr4_read ();
819 target_supports_memory_tagging ()
821 return current_inferior ()->top_target ()->supports_memory_tagging ();
825 target_fetch_memtags (CORE_ADDR address
, size_t len
, gdb::byte_vector
&tags
,
828 return current_inferior ()->top_target ()->fetch_memtags (address
, len
, tags
, type
);
832 target_store_memtags (CORE_ADDR address
, size_t len
,
833 const gdb::byte_vector
&tags
, int type
)
835 return current_inferior ()->top_target ()->store_memtags (address
, len
, tags
, type
);
839 target_log_command (const char *p
)
841 return current_inferior ()->top_target ()->log_command (p
);
844 /* This is used to implement the various target commands. */
847 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
849 auto *ti
= static_cast<target_info
*> (command
->context ());
850 target_open_ftype
*func
= target_factories
[ti
];
853 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
856 func (args
, from_tty
);
859 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
860 ti
->shortname
, args
, from_tty
);
866 add_target (const target_info
&t
, target_open_ftype
*func
,
867 completer_ftype
*completer
)
869 struct cmd_list_element
*c
;
871 auto &func_slot
= target_factories
[&t
];
872 if (func_slot
!= nullptr)
873 internal_error (__FILE__
, __LINE__
,
874 _("target already added (\"%s\")."), t
.shortname
);
877 if (targetlist
== NULL
)
878 add_basic_prefix_cmd ("target", class_run
, _("\
879 Connect to a target machine or process.\n\
880 The first argument is the type or protocol of the target machine.\n\
881 Remaining arguments are interpreted by the target protocol. For more\n\
882 information on the arguments for a particular protocol, type\n\
883 `help target ' followed by the protocol name."),
884 &targetlist
, 0, &cmdlist
);
885 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
886 c
->set_context ((void *) &t
);
887 c
->func
= open_target
;
888 if (completer
!= NULL
)
889 set_cmd_completer (c
, completer
);
895 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
897 struct cmd_list_element
*c
;
899 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
901 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
902 c
->func
= open_target
;
903 c
->set_context ((void *) &tinfo
);
904 gdb::unique_xmalloc_ptr
<char> alt
905 = xstrprintf ("target %s", tinfo
.shortname
);
906 deprecate_cmd (c
, alt
.release ());
914 current_inferior ()->top_target ()->kill ();
918 target_load (const char *arg
, int from_tty
)
920 target_dcache_invalidate ();
921 current_inferior ()->top_target ()->load (arg
, from_tty
);
926 target_terminal_state
target_terminal::m_terminal_state
927 = target_terminal_state::is_ours
;
929 /* See target/target.h. */
932 target_terminal::init (void)
934 current_inferior ()->top_target ()->terminal_init ();
936 m_terminal_state
= target_terminal_state::is_ours
;
939 /* See target/target.h. */
942 target_terminal::inferior (void)
944 struct ui
*ui
= current_ui
;
946 /* A background resume (``run&'') should leave GDB in control of the
948 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
951 /* Since we always run the inferior in the main console (unless "set
952 inferior-tty" is in effect), when some UI other than the main one
953 calls target_terminal::inferior, then we leave the main UI's
954 terminal settings as is. */
958 /* If GDB is resuming the inferior in the foreground, install
959 inferior's terminal modes. */
961 struct inferior
*inf
= current_inferior ();
963 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
965 current_inferior ()->top_target ()->terminal_inferior ();
966 inf
->terminal_state
= target_terminal_state::is_inferior
;
969 m_terminal_state
= target_terminal_state::is_inferior
;
971 /* If the user hit C-c before, pretend that it was hit right
973 if (check_quit_flag ())
974 target_pass_ctrlc ();
977 /* See target/target.h. */
980 target_terminal::restore_inferior (void)
982 struct ui
*ui
= current_ui
;
984 /* See target_terminal::inferior(). */
985 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
988 /* Restore the terminal settings of inferiors that were in the
989 foreground but are now ours_for_output due to a temporary
990 target_target::ours_for_output() call. */
993 scoped_restore_current_inferior restore_inferior
;
995 for (::inferior
*inf
: all_inferiors ())
997 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
999 set_current_inferior (inf
);
1000 current_inferior ()->top_target ()->terminal_inferior ();
1001 inf
->terminal_state
= target_terminal_state::is_inferior
;
1006 m_terminal_state
= target_terminal_state::is_inferior
;
1008 /* If the user hit C-c before, pretend that it was hit right
1010 if (check_quit_flag ())
1011 target_pass_ctrlc ();
1014 /* Switch terminal state to DESIRED_STATE, either is_ours, or
1015 is_ours_for_output. */
1018 target_terminal_is_ours_kind (target_terminal_state desired_state
)
1020 scoped_restore_current_inferior restore_inferior
;
1022 /* Must do this in two passes. First, have all inferiors save the
1023 current terminal settings. Then, after all inferiors have add a
1024 chance to safely save the terminal settings, restore GDB's
1025 terminal settings. */
1027 for (inferior
*inf
: all_inferiors ())
1029 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
1031 set_current_inferior (inf
);
1032 current_inferior ()->top_target ()->terminal_save_inferior ();
1036 for (inferior
*inf
: all_inferiors ())
1038 /* Note we don't check is_inferior here like above because we
1039 need to handle 'is_ours_for_output -> is_ours' too. Careful
1040 to never transition from 'is_ours' to 'is_ours_for_output',
1042 if (inf
->terminal_state
!= target_terminal_state::is_ours
1043 && inf
->terminal_state
!= desired_state
)
1045 set_current_inferior (inf
);
1046 if (desired_state
== target_terminal_state::is_ours
)
1047 current_inferior ()->top_target ()->terminal_ours ();
1048 else if (desired_state
== target_terminal_state::is_ours_for_output
)
1049 current_inferior ()->top_target ()->terminal_ours_for_output ();
1051 gdb_assert_not_reached ("unhandled desired state");
1052 inf
->terminal_state
= desired_state
;
1057 /* See target/target.h. */
1060 target_terminal::ours ()
1062 struct ui
*ui
= current_ui
;
1064 /* See target_terminal::inferior. */
1068 if (m_terminal_state
== target_terminal_state::is_ours
)
1071 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
1072 m_terminal_state
= target_terminal_state::is_ours
;
1075 /* See target/target.h. */
1078 target_terminal::ours_for_output ()
1080 struct ui
*ui
= current_ui
;
1082 /* See target_terminal::inferior. */
1086 if (!target_terminal::is_inferior ())
1089 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
1090 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
1093 /* See target/target.h. */
1096 target_terminal::info (const char *arg
, int from_tty
)
1098 current_inferior ()->top_target ()->terminal_info (arg
, from_tty
);
1104 target_supports_terminal_ours (void)
1106 /* The current top target is the target at the top of the target
1107 stack of the current inferior. While normally there's always an
1108 inferior, we must check for nullptr here because we can get here
1109 very early during startup, before the initial inferior is first
1111 inferior
*inf
= current_inferior ();
1115 return inf
->top_target ()->supports_terminal_ours ();
1121 error (_("You can't do that when your target is `%s'"),
1122 current_inferior ()->top_target ()->shortname ());
1128 error (_("You can't do that without a process to debug."));
1132 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
1134 printf_unfiltered (_("No saved terminal information.\n"));
1137 /* A default implementation for the to_get_ada_task_ptid target method.
1139 This function builds the PTID by using both LWP and TID as part of
1140 the PTID lwp and tid elements. The pid used is the pid of the
1144 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, ULONGEST tid
)
1146 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
1149 static enum exec_direction_kind
1150 default_execution_direction (struct target_ops
*self
)
1152 if (!target_can_execute_reverse ())
1153 return EXEC_FORWARD
;
1154 else if (!target_can_async_p ())
1155 return EXEC_FORWARD
;
1157 gdb_assert_not_reached ("\
1158 to_execution_direction must be implemented for reverse async");
1164 decref_target (target_ops
*t
)
1167 if (t
->refcount () == 0)
1169 if (t
->stratum () == process_stratum
)
1170 connection_list_remove (as_process_stratum_target (t
));
1178 target_stack::push (target_ops
*t
)
1182 strata stratum
= t
->stratum ();
1184 if (stratum
== process_stratum
)
1185 connection_list_add (as_process_stratum_target (t
));
1187 /* If there's already a target at this stratum, remove it. */
1189 if (m_stack
[stratum
] != NULL
)
1190 unpush (m_stack
[stratum
]);
1192 /* Now add the new one. */
1193 m_stack
[stratum
] = t
;
1195 if (m_top
< stratum
)
1202 target_stack::unpush (target_ops
*t
)
1204 gdb_assert (t
!= NULL
);
1206 strata stratum
= t
->stratum ();
1208 if (stratum
== dummy_stratum
)
1209 internal_error (__FILE__
, __LINE__
,
1210 _("Attempt to unpush the dummy target"));
1212 /* Look for the specified target. Note that a target can only occur
1213 once in the target stack. */
1215 if (m_stack
[stratum
] != t
)
1217 /* If T wasn't pushed, quit. Only open targets should be
1222 /* Unchain the target. */
1223 m_stack
[stratum
] = NULL
;
1225 if (m_top
== stratum
)
1226 m_top
= this->find_beneath (t
)->stratum ();
1228 /* Finally close the target, if there are no inferiors
1229 referencing this target still. Note we do this after unchaining,
1230 so any target method calls from within the target_close
1231 implementation don't end up in T anymore. Do leave the target
1232 open if we have are other inferiors referencing this target
1239 /* Unpush TARGET and assert that it worked. */
1242 unpush_target_and_assert (struct target_ops
*target
)
1244 if (!current_inferior ()->unpush_target (target
))
1246 fprintf_unfiltered (gdb_stderr
,
1247 "pop_all_targets couldn't find target %s\n",
1248 target
->shortname ());
1249 internal_error (__FILE__
, __LINE__
,
1250 _("failed internal consistency check"));
1255 pop_all_targets_above (enum strata above_stratum
)
1257 while ((int) (current_inferior ()->top_target ()->stratum ())
1258 > (int) above_stratum
)
1259 unpush_target_and_assert (current_inferior ()->top_target ());
1265 pop_all_targets_at_and_above (enum strata stratum
)
1267 while ((int) (current_inferior ()->top_target ()->stratum ())
1269 unpush_target_and_assert (current_inferior ()->top_target ());
1273 pop_all_targets (void)
1275 pop_all_targets_above (dummy_stratum
);
1279 target_unpusher::operator() (struct target_ops
*ops
) const
1281 current_inferior ()->unpush_target (ops
);
1284 /* Default implementation of to_get_thread_local_address. */
1287 generic_tls_error (void)
1289 throw_error (TLS_GENERIC_ERROR
,
1290 _("Cannot find thread-local variables on this target"));
1293 /* Using the objfile specified in OBJFILE, find the address for the
1294 current thread's thread-local storage with offset OFFSET. */
1296 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1298 volatile CORE_ADDR addr
= 0;
1299 struct target_ops
*target
= current_inferior ()->top_target ();
1300 struct gdbarch
*gdbarch
= target_gdbarch ();
1302 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
1304 ptid_t ptid
= inferior_ptid
;
1310 /* Fetch the load module address for this objfile. */
1311 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
1314 if (gdbarch_get_thread_local_address_p (gdbarch
))
1315 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
1318 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
1320 /* If an error occurred, print TLS related messages here. Otherwise,
1321 throw the error to some higher catcher. */
1322 catch (const gdb_exception
&ex
)
1324 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1328 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1329 error (_("Cannot find thread-local variables "
1330 "in this thread library."));
1332 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1333 if (objfile_is_library
)
1334 error (_("Cannot find shared library `%s' in dynamic"
1335 " linker's load module list"), objfile_name (objfile
));
1337 error (_("Cannot find executable file `%s' in dynamic"
1338 " linker's load module list"), objfile_name (objfile
));
1340 case TLS_NOT_ALLOCATED_YET_ERROR
:
1341 if (objfile_is_library
)
1342 error (_("The inferior has not yet allocated storage for"
1343 " thread-local variables in\n"
1344 "the shared library `%s'\n"
1346 objfile_name (objfile
),
1347 target_pid_to_str (ptid
).c_str ());
1349 error (_("The inferior has not yet allocated storage for"
1350 " thread-local variables in\n"
1351 "the executable `%s'\n"
1353 objfile_name (objfile
),
1354 target_pid_to_str (ptid
).c_str ());
1356 case TLS_GENERIC_ERROR
:
1357 if (objfile_is_library
)
1358 error (_("Cannot find thread-local storage for %s, "
1359 "shared library %s:\n%s"),
1360 target_pid_to_str (ptid
).c_str (),
1361 objfile_name (objfile
), ex
.what ());
1363 error (_("Cannot find thread-local storage for %s, "
1364 "executable file %s:\n%s"),
1365 target_pid_to_str (ptid
).c_str (),
1366 objfile_name (objfile
), ex
.what ());
1375 error (_("Cannot find thread-local variables on this target"));
1381 target_xfer_status_to_string (enum target_xfer_status status
)
1383 #define CASE(X) case X: return #X
1386 CASE(TARGET_XFER_E_IO
);
1387 CASE(TARGET_XFER_UNAVAILABLE
);
1397 gdb::unique_xmalloc_ptr
<char>
1398 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
1400 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
1403 if (bytes_read
== nullptr)
1404 bytes_read
= &ignore
;
1406 /* Note that the endian-ness does not matter here. */
1407 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
1408 &buffer
, bytes_read
);
1412 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1415 const target_section_table
*
1416 target_get_section_table (struct target_ops
*target
)
1418 return target
->get_section_table ();
1421 /* Find a section containing ADDR. */
1423 const struct target_section
*
1424 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1426 const target_section_table
*table
= target_get_section_table (target
);
1431 for (const target_section
&secp
: *table
)
1433 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1441 const target_section_table
*
1442 default_get_section_table ()
1444 return ¤t_program_space
->target_sections ();
1447 /* Helper for the memory xfer routines. Checks the attributes of the
1448 memory region of MEMADDR against the read or write being attempted.
1449 If the access is permitted returns true, otherwise returns false.
1450 REGION_P is an optional output parameter. If not-NULL, it is
1451 filled with a pointer to the memory region of MEMADDR. REG_LEN
1452 returns LEN trimmed to the end of the region. This is how much the
1453 caller can continue requesting, if the access is permitted. A
1454 single xfer request must not straddle memory region boundaries. */
1457 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1458 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1459 struct mem_region
**region_p
)
1461 struct mem_region
*region
;
1463 region
= lookup_mem_region (memaddr
);
1465 if (region_p
!= NULL
)
1468 switch (region
->attrib
.mode
)
1471 if (writebuf
!= NULL
)
1476 if (readbuf
!= NULL
)
1481 /* We only support writing to flash during "load" for now. */
1482 if (writebuf
!= NULL
)
1483 error (_("Writing to flash memory forbidden in this context"));
1490 /* region->hi == 0 means there's no upper bound. */
1491 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1494 *reg_len
= region
->hi
- memaddr
;
1499 /* Read memory from more than one valid target. A core file, for
1500 instance, could have some of memory but delegate other bits to
1501 the target below it. So, we must manually try all targets. */
1503 enum target_xfer_status
1504 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1505 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1506 ULONGEST
*xfered_len
)
1508 enum target_xfer_status res
;
1512 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1513 readbuf
, writebuf
, memaddr
, len
,
1515 if (res
== TARGET_XFER_OK
)
1518 /* Stop if the target reports that the memory is not available. */
1519 if (res
== TARGET_XFER_UNAVAILABLE
)
1522 /* Don't continue past targets which have all the memory.
1523 At one time, this code was necessary to read data from
1524 executables / shared libraries when data for the requested
1525 addresses weren't available in the core file. But now the
1526 core target handles this case itself. */
1527 if (ops
->has_all_memory ())
1530 ops
= ops
->beneath ();
1532 while (ops
!= NULL
);
1534 /* The cache works at the raw memory level. Make sure the cache
1535 gets updated with raw contents no matter what kind of memory
1536 object was originally being written. Note we do write-through
1537 first, so that if it fails, we don't write to the cache contents
1538 that never made it to the target. */
1539 if (writebuf
!= NULL
1540 && inferior_ptid
!= null_ptid
1541 && target_dcache_init_p ()
1542 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1544 DCACHE
*dcache
= target_dcache_get ();
1546 /* Note that writing to an area of memory which wasn't present
1547 in the cache doesn't cause it to be loaded in. */
1548 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1554 /* Perform a partial memory transfer.
1555 For docs see target.h, to_xfer_partial. */
1557 static enum target_xfer_status
1558 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1559 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1560 ULONGEST len
, ULONGEST
*xfered_len
)
1562 enum target_xfer_status res
;
1564 struct mem_region
*region
;
1565 struct inferior
*inf
;
1567 /* For accesses to unmapped overlay sections, read directly from
1568 files. Must do this first, as MEMADDR may need adjustment. */
1569 if (readbuf
!= NULL
&& overlay_debugging
)
1571 struct obj_section
*section
= find_pc_overlay (memaddr
);
1573 if (pc_in_unmapped_range (memaddr
, section
))
1575 const target_section_table
*table
= target_get_section_table (ops
);
1576 const char *section_name
= section
->the_bfd_section
->name
;
1578 memaddr
= overlay_mapped_address (memaddr
, section
);
1580 auto match_cb
= [=] (const struct target_section
*s
)
1582 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1585 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1586 memaddr
, len
, xfered_len
,
1591 /* Try the executable files, if "trust-readonly-sections" is set. */
1592 if (readbuf
!= NULL
&& trust_readonly
)
1594 const struct target_section
*secp
1595 = target_section_by_addr (ops
, memaddr
);
1597 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1599 const target_section_table
*table
= target_get_section_table (ops
);
1600 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1601 memaddr
, len
, xfered_len
,
1606 /* Try GDB's internal data cache. */
1608 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1610 return TARGET_XFER_E_IO
;
1612 if (inferior_ptid
!= null_ptid
)
1613 inf
= current_inferior ();
1619 /* The dcache reads whole cache lines; that doesn't play well
1620 with reading from a trace buffer, because reading outside of
1621 the collected memory range fails. */
1622 && get_traceframe_number () == -1
1623 && (region
->attrib
.cache
1624 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1625 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1627 DCACHE
*dcache
= target_dcache_get_or_init ();
1629 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1630 reg_len
, xfered_len
);
1633 /* If none of those methods found the memory we wanted, fall back
1634 to a target partial transfer. Normally a single call to
1635 to_xfer_partial is enough; if it doesn't recognize an object
1636 it will call the to_xfer_partial of the next target down.
1637 But for memory this won't do. Memory is the only target
1638 object which can be read from more than one valid target.
1639 A core file, for instance, could have some of memory but
1640 delegate other bits to the target below it. So, we must
1641 manually try all targets. */
1643 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1646 /* If we still haven't got anything, return the last error. We
1651 /* Perform a partial memory transfer. For docs see target.h,
1654 static enum target_xfer_status
1655 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1656 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1657 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1659 enum target_xfer_status res
;
1661 /* Zero length requests are ok and require no work. */
1663 return TARGET_XFER_EOF
;
1665 memaddr
= address_significant (target_gdbarch (), memaddr
);
1667 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1668 breakpoint insns, thus hiding out from higher layers whether
1669 there are software breakpoints inserted in the code stream. */
1670 if (readbuf
!= NULL
)
1672 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1675 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1676 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1680 /* A large write request is likely to be partially satisfied
1681 by memory_xfer_partial_1. We will continually malloc
1682 and free a copy of the entire write request for breakpoint
1683 shadow handling even though we only end up writing a small
1684 subset of it. Cap writes to a limit specified by the target
1685 to mitigate this. */
1686 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1688 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1689 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1690 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1697 scoped_restore_tmpl
<int>
1698 make_scoped_restore_show_memory_breakpoints (int show
)
1700 return make_scoped_restore (&show_memory_breakpoints
, show
);
1703 /* For docs see target.h, to_xfer_partial. */
1705 enum target_xfer_status
1706 target_xfer_partial (struct target_ops
*ops
,
1707 enum target_object object
, const char *annex
,
1708 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1709 ULONGEST offset
, ULONGEST len
,
1710 ULONGEST
*xfered_len
)
1712 enum target_xfer_status retval
;
1714 /* Transfer is done when LEN is zero. */
1716 return TARGET_XFER_EOF
;
1718 if (writebuf
&& !may_write_memory
)
1719 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1720 core_addr_to_string_nz (offset
), plongest (len
));
1724 /* If this is a memory transfer, let the memory-specific code
1725 have a look at it instead. Memory transfers are more
1727 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1728 || object
== TARGET_OBJECT_CODE_MEMORY
)
1729 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1730 writebuf
, offset
, len
, xfered_len
);
1731 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1733 /* Skip/avoid accessing the target if the memory region
1734 attributes block the access. Check this here instead of in
1735 raw_memory_xfer_partial as otherwise we'd end up checking
1736 this twice in the case of the memory_xfer_partial path is
1737 taken; once before checking the dcache, and another in the
1738 tail call to raw_memory_xfer_partial. */
1739 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1741 return TARGET_XFER_E_IO
;
1743 /* Request the normal memory object from other layers. */
1744 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1748 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1749 writebuf
, offset
, len
, xfered_len
);
1753 const unsigned char *myaddr
= NULL
;
1755 fprintf_unfiltered (gdb_stdlog
,
1756 "%s:target_xfer_partial "
1757 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1760 (annex
? annex
: "(null)"),
1761 host_address_to_string (readbuf
),
1762 host_address_to_string (writebuf
),
1763 core_addr_to_string_nz (offset
),
1764 pulongest (len
), retval
,
1765 pulongest (*xfered_len
));
1771 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1775 fputs_unfiltered (", bytes =", gdb_stdlog
);
1776 for (i
= 0; i
< *xfered_len
; i
++)
1778 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1780 if (targetdebug
< 2 && i
> 0)
1782 fprintf_unfiltered (gdb_stdlog
, " ...");
1785 fprintf_unfiltered (gdb_stdlog
, "\n");
1788 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1792 fputc_unfiltered ('\n', gdb_stdlog
);
1795 /* Check implementations of to_xfer_partial update *XFERED_LEN
1796 properly. Do assertion after printing debug messages, so that we
1797 can find more clues on assertion failure from debugging messages. */
1798 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1799 gdb_assert (*xfered_len
> 0);
1804 /* Read LEN bytes of target memory at address MEMADDR, placing the
1805 results in GDB's memory at MYADDR. Returns either 0 for success or
1806 -1 if any error occurs.
1808 If an error occurs, no guarantee is made about the contents of the data at
1809 MYADDR. In particular, the caller should not depend upon partial reads
1810 filling the buffer with good data. There is no way for the caller to know
1811 how much good data might have been transfered anyway. Callers that can
1812 deal with partial reads should call target_read (which will retry until
1813 it makes no progress, and then return how much was transferred). */
1816 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1818 if (target_read (current_inferior ()->top_target (),
1819 TARGET_OBJECT_MEMORY
, NULL
,
1820 myaddr
, memaddr
, len
) == len
)
1826 /* See target/target.h. */
1829 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1834 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1837 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1838 gdbarch_byte_order (target_gdbarch ()));
1842 /* Like target_read_memory, but specify explicitly that this is a read
1843 from the target's raw memory. That is, this read bypasses the
1844 dcache, breakpoint shadowing, etc. */
1847 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1849 if (target_read (current_inferior ()->top_target (),
1850 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1851 myaddr
, memaddr
, len
) == len
)
1857 /* Like target_read_memory, but specify explicitly that this is a read from
1858 the target's stack. This may trigger different cache behavior. */
1861 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1863 if (target_read (current_inferior ()->top_target (),
1864 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1865 myaddr
, memaddr
, len
) == len
)
1871 /* Like target_read_memory, but specify explicitly that this is a read from
1872 the target's code. This may trigger different cache behavior. */
1875 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1877 if (target_read (current_inferior ()->top_target (),
1878 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1879 myaddr
, memaddr
, len
) == len
)
1885 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1886 Returns either 0 for success or -1 if any error occurs. If an
1887 error occurs, no guarantee is made about how much data got written.
1888 Callers that can deal with partial writes should call
1892 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1894 if (target_write (current_inferior ()->top_target (),
1895 TARGET_OBJECT_MEMORY
, NULL
,
1896 myaddr
, memaddr
, len
) == len
)
1902 /* Write LEN bytes from MYADDR to target raw memory at address
1903 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1904 If an error occurs, no guarantee is made about how much data got
1905 written. Callers that can deal with partial writes should call
1909 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1911 if (target_write (current_inferior ()->top_target (),
1912 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1913 myaddr
, memaddr
, len
) == len
)
1919 /* Fetch the target's memory map. */
1921 std::vector
<mem_region
>
1922 target_memory_map (void)
1924 target_ops
*target
= current_inferior ()->top_target ();
1925 std::vector
<mem_region
> result
= target
->memory_map ();
1926 if (result
.empty ())
1929 std::sort (result
.begin (), result
.end ());
1931 /* Check that regions do not overlap. Simultaneously assign
1932 a numbering for the "mem" commands to use to refer to
1934 mem_region
*last_one
= NULL
;
1935 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1937 mem_region
*this_one
= &result
[ix
];
1938 this_one
->number
= ix
;
1940 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1942 warning (_("Overlapping regions in memory map: ignoring"));
1943 return std::vector
<mem_region
> ();
1946 last_one
= this_one
;
1953 target_flash_erase (ULONGEST address
, LONGEST length
)
1955 current_inferior ()->top_target ()->flash_erase (address
, length
);
1959 target_flash_done (void)
1961 current_inferior ()->top_target ()->flash_done ();
1965 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1966 struct cmd_list_element
*c
, const char *value
)
1968 fprintf_filtered (file
,
1969 _("Mode for reading from readonly sections is %s.\n"),
1973 /* Target vector read/write partial wrapper functions. */
1975 static enum target_xfer_status
1976 target_read_partial (struct target_ops
*ops
,
1977 enum target_object object
,
1978 const char *annex
, gdb_byte
*buf
,
1979 ULONGEST offset
, ULONGEST len
,
1980 ULONGEST
*xfered_len
)
1982 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1986 static enum target_xfer_status
1987 target_write_partial (struct target_ops
*ops
,
1988 enum target_object object
,
1989 const char *annex
, const gdb_byte
*buf
,
1990 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1992 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1996 /* Wrappers to perform the full transfer. */
1998 /* For docs on target_read see target.h. */
2001 target_read (struct target_ops
*ops
,
2002 enum target_object object
,
2003 const char *annex
, gdb_byte
*buf
,
2004 ULONGEST offset
, LONGEST len
)
2006 LONGEST xfered_total
= 0;
2009 /* If we are reading from a memory object, find the length of an addressable
2010 unit for that architecture. */
2011 if (object
== TARGET_OBJECT_MEMORY
2012 || object
== TARGET_OBJECT_STACK_MEMORY
2013 || object
== TARGET_OBJECT_CODE_MEMORY
2014 || object
== TARGET_OBJECT_RAW_MEMORY
)
2015 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2017 while (xfered_total
< len
)
2019 ULONGEST xfered_partial
;
2020 enum target_xfer_status status
;
2022 status
= target_read_partial (ops
, object
, annex
,
2023 buf
+ xfered_total
* unit_size
,
2024 offset
+ xfered_total
, len
- xfered_total
,
2027 /* Call an observer, notifying them of the xfer progress? */
2028 if (status
== TARGET_XFER_EOF
)
2029 return xfered_total
;
2030 else if (status
== TARGET_XFER_OK
)
2032 xfered_total
+= xfered_partial
;
2036 return TARGET_XFER_E_IO
;
2042 /* Assuming that the entire [begin, end) range of memory cannot be
2043 read, try to read whatever subrange is possible to read.
2045 The function returns, in RESULT, either zero or one memory block.
2046 If there's a readable subrange at the beginning, it is completely
2047 read and returned. Any further readable subrange will not be read.
2048 Otherwise, if there's a readable subrange at the end, it will be
2049 completely read and returned. Any readable subranges before it
2050 (obviously, not starting at the beginning), will be ignored. In
2051 other cases -- either no readable subrange, or readable subrange(s)
2052 that is neither at the beginning, or end, nothing is returned.
2054 The purpose of this function is to handle a read across a boundary
2055 of accessible memory in a case when memory map is not available.
2056 The above restrictions are fine for this case, but will give
2057 incorrect results if the memory is 'patchy'. However, supporting
2058 'patchy' memory would require trying to read every single byte,
2059 and it seems unacceptable solution. Explicit memory map is
2060 recommended for this case -- and target_read_memory_robust will
2061 take care of reading multiple ranges then. */
2064 read_whatever_is_readable (struct target_ops
*ops
,
2065 const ULONGEST begin
, const ULONGEST end
,
2067 std::vector
<memory_read_result
> *result
)
2069 ULONGEST current_begin
= begin
;
2070 ULONGEST current_end
= end
;
2072 ULONGEST xfered_len
;
2074 /* If we previously failed to read 1 byte, nothing can be done here. */
2075 if (end
- begin
<= 1)
2078 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2080 /* Check that either first or the last byte is readable, and give up
2081 if not. This heuristic is meant to permit reading accessible memory
2082 at the boundary of accessible region. */
2083 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2084 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2089 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2090 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2091 &xfered_len
) == TARGET_XFER_OK
)
2099 /* Loop invariant is that the [current_begin, current_end) was previously
2100 found to be not readable as a whole.
2102 Note loop condition -- if the range has 1 byte, we can't divide the range
2103 so there's no point trying further. */
2104 while (current_end
- current_begin
> 1)
2106 ULONGEST first_half_begin
, first_half_end
;
2107 ULONGEST second_half_begin
, second_half_end
;
2109 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2113 first_half_begin
= current_begin
;
2114 first_half_end
= middle
;
2115 second_half_begin
= middle
;
2116 second_half_end
= current_end
;
2120 first_half_begin
= middle
;
2121 first_half_end
= current_end
;
2122 second_half_begin
= current_begin
;
2123 second_half_end
= middle
;
2126 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2127 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2129 first_half_end
- first_half_begin
);
2131 if (xfer
== first_half_end
- first_half_begin
)
2133 /* This half reads up fine. So, the error must be in the
2135 current_begin
= second_half_begin
;
2136 current_end
= second_half_end
;
2140 /* This half is not readable. Because we've tried one byte, we
2141 know some part of this half if actually readable. Go to the next
2142 iteration to divide again and try to read.
2144 We don't handle the other half, because this function only tries
2145 to read a single readable subrange. */
2146 current_begin
= first_half_begin
;
2147 current_end
= first_half_end
;
2153 /* The [begin, current_begin) range has been read. */
2154 result
->emplace_back (begin
, current_end
, std::move (buf
));
2158 /* The [current_end, end) range has been read. */
2159 LONGEST region_len
= end
- current_end
;
2161 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2162 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2163 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2164 region_len
* unit_size
);
2165 result
->emplace_back (current_end
, end
, std::move (data
));
2169 std::vector
<memory_read_result
>
2170 read_memory_robust (struct target_ops
*ops
,
2171 const ULONGEST offset
, const LONGEST len
)
2173 std::vector
<memory_read_result
> result
;
2174 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2176 LONGEST xfered_total
= 0;
2177 while (xfered_total
< len
)
2179 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2182 /* If there is no explicit region, a fake one should be created. */
2183 gdb_assert (region
);
2185 if (region
->hi
== 0)
2186 region_len
= len
- xfered_total
;
2188 region_len
= region
->hi
- offset
;
2190 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2192 /* Cannot read this region. Note that we can end up here only
2193 if the region is explicitly marked inaccessible, or
2194 'inaccessible-by-default' is in effect. */
2195 xfered_total
+= region_len
;
2199 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2200 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2201 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2203 LONGEST xfered_partial
=
2204 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2205 offset
+ xfered_total
, to_read
);
2206 /* Call an observer, notifying them of the xfer progress? */
2207 if (xfered_partial
<= 0)
2209 /* Got an error reading full chunk. See if maybe we can read
2211 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2212 offset
+ xfered_total
+ to_read
,
2213 unit_size
, &result
);
2214 xfered_total
+= to_read
;
2218 result
.emplace_back (offset
+ xfered_total
,
2219 offset
+ xfered_total
+ xfered_partial
,
2220 std::move (buffer
));
2221 xfered_total
+= xfered_partial
;
2231 /* An alternative to target_write with progress callbacks. */
2234 target_write_with_progress (struct target_ops
*ops
,
2235 enum target_object object
,
2236 const char *annex
, const gdb_byte
*buf
,
2237 ULONGEST offset
, LONGEST len
,
2238 void (*progress
) (ULONGEST
, void *), void *baton
)
2240 LONGEST xfered_total
= 0;
2243 /* If we are writing to a memory object, find the length of an addressable
2244 unit for that architecture. */
2245 if (object
== TARGET_OBJECT_MEMORY
2246 || object
== TARGET_OBJECT_STACK_MEMORY
2247 || object
== TARGET_OBJECT_CODE_MEMORY
2248 || object
== TARGET_OBJECT_RAW_MEMORY
)
2249 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2251 /* Give the progress callback a chance to set up. */
2253 (*progress
) (0, baton
);
2255 while (xfered_total
< len
)
2257 ULONGEST xfered_partial
;
2258 enum target_xfer_status status
;
2260 status
= target_write_partial (ops
, object
, annex
,
2261 buf
+ xfered_total
* unit_size
,
2262 offset
+ xfered_total
, len
- xfered_total
,
2265 if (status
!= TARGET_XFER_OK
)
2266 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2269 (*progress
) (xfered_partial
, baton
);
2271 xfered_total
+= xfered_partial
;
2277 /* For docs on target_write see target.h. */
2280 target_write (struct target_ops
*ops
,
2281 enum target_object object
,
2282 const char *annex
, const gdb_byte
*buf
,
2283 ULONGEST offset
, LONGEST len
)
2285 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2289 /* Help for target_read_alloc and target_read_stralloc. See their comments
2292 template <typename T
>
2293 gdb::optional
<gdb::def_vector
<T
>>
2294 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2297 gdb::def_vector
<T
> buf
;
2299 const int chunk
= 4096;
2301 /* This function does not have a length parameter; it reads the
2302 entire OBJECT). Also, it doesn't support objects fetched partly
2303 from one target and partly from another (in a different stratum,
2304 e.g. a core file and an executable). Both reasons make it
2305 unsuitable for reading memory. */
2306 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2308 /* Start by reading up to 4K at a time. The target will throttle
2309 this number down if necessary. */
2312 ULONGEST xfered_len
;
2313 enum target_xfer_status status
;
2315 buf
.resize (buf_pos
+ chunk
);
2317 status
= target_read_partial (ops
, object
, annex
,
2318 (gdb_byte
*) &buf
[buf_pos
],
2322 if (status
== TARGET_XFER_EOF
)
2324 /* Read all there was. */
2325 buf
.resize (buf_pos
);
2328 else if (status
!= TARGET_XFER_OK
)
2330 /* An error occurred. */
2334 buf_pos
+= xfered_len
;
2342 gdb::optional
<gdb::byte_vector
>
2343 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2346 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2351 gdb::optional
<gdb::char_vector
>
2352 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2355 gdb::optional
<gdb::char_vector
> buf
2356 = target_read_alloc_1
<char> (ops
, object
, annex
);
2361 if (buf
->empty () || buf
->back () != '\0')
2362 buf
->push_back ('\0');
2364 /* Check for embedded NUL bytes; but allow trailing NULs. */
2365 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2366 it
!= buf
->end (); it
++)
2369 warning (_("target object %d, annex %s, "
2370 "contained unexpected null characters"),
2371 (int) object
, annex
? annex
: "(none)");
2378 /* Memory transfer methods. */
2381 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2384 /* This method is used to read from an alternate, non-current
2385 target. This read must bypass the overlay support (as symbols
2386 don't match this target), and GDB's internal cache (wrong cache
2387 for this target). */
2388 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2390 memory_error (TARGET_XFER_E_IO
, addr
);
2394 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2395 int len
, enum bfd_endian byte_order
)
2397 gdb_byte buf
[sizeof (ULONGEST
)];
2399 gdb_assert (len
<= sizeof (buf
));
2400 get_target_memory (ops
, addr
, buf
, len
);
2401 return extract_unsigned_integer (buf
, len
, byte_order
);
2407 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2408 struct bp_target_info
*bp_tgt
)
2410 if (!may_insert_breakpoints
)
2412 warning (_("May not insert breakpoints"));
2416 target_ops
*target
= current_inferior ()->top_target ();
2418 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2424 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2425 struct bp_target_info
*bp_tgt
,
2426 enum remove_bp_reason reason
)
2428 /* This is kind of a weird case to handle, but the permission might
2429 have been changed after breakpoints were inserted - in which case
2430 we should just take the user literally and assume that any
2431 breakpoints should be left in place. */
2432 if (!may_insert_breakpoints
)
2434 warning (_("May not remove breakpoints"));
2438 target_ops
*target
= current_inferior ()->top_target ();
2440 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2444 info_target_command (const char *args
, int from_tty
)
2446 int has_all_mem
= 0;
2448 if (current_program_space
->symfile_object_file
!= NULL
)
2450 objfile
*objf
= current_program_space
->symfile_object_file
;
2451 printf_unfiltered (_("Symbols from \"%s\".\n"),
2452 objfile_name (objf
));
2455 for (target_ops
*t
= current_inferior ()->top_target ();
2459 if (!t
->has_memory ())
2462 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2465 printf_unfiltered (_("\tWhile running this, "
2466 "GDB does not access memory from...\n"));
2467 printf_unfiltered ("%s:\n", t
->longname ());
2469 has_all_mem
= t
->has_all_memory ();
2473 /* This function is called before any new inferior is created, e.g.
2474 by running a program, attaching, or connecting to a target.
2475 It cleans up any state from previous invocations which might
2476 change between runs. This is a subset of what target_preopen
2477 resets (things which might change between targets). */
2480 target_pre_inferior (int from_tty
)
2482 /* Clear out solib state. Otherwise the solib state of the previous
2483 inferior might have survived and is entirely wrong for the new
2484 target. This has been observed on GNU/Linux using glibc 2.3. How
2496 Cannot access memory at address 0xdeadbeef
2499 /* In some OSs, the shared library list is the same/global/shared
2500 across inferiors. If code is shared between processes, so are
2501 memory regions and features. */
2502 if (!gdbarch_has_global_solist (target_gdbarch ()))
2504 no_shared_libraries (NULL
, from_tty
);
2506 invalidate_target_mem_regions ();
2508 target_clear_description ();
2511 /* attach_flag may be set if the previous process associated with
2512 the inferior was attached to. */
2513 current_inferior ()->attach_flag
= 0;
2515 current_inferior ()->highest_thread_num
= 0;
2517 agent_capability_invalidate ();
2520 /* This is to be called by the open routine before it does
2524 target_preopen (int from_tty
)
2528 if (current_inferior ()->pid
!= 0)
2531 || !target_has_execution ()
2532 || query (_("A program is being debugged already. Kill it? ")))
2534 /* Core inferiors actually should be detached, not
2536 if (target_has_execution ())
2539 target_detach (current_inferior (), 0);
2542 error (_("Program not killed."));
2545 /* Calling target_kill may remove the target from the stack. But if
2546 it doesn't (which seems like a win for UDI), remove it now. */
2547 /* Leave the exec target, though. The user may be switching from a
2548 live process to a core of the same program. */
2549 pop_all_targets_above (file_stratum
);
2551 target_pre_inferior (from_tty
);
2557 target_detach (inferior
*inf
, int from_tty
)
2559 /* After we have detached, we will clear the register cache for this inferior
2560 by calling registers_changed_ptid. We must save the pid_ptid before
2561 detaching, as the target detach method will clear inf->pid. */
2562 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2564 /* As long as some to_detach implementations rely on the current_inferior
2565 (either directly, or indirectly, like through target_gdbarch or by
2566 reading memory), INF needs to be the current inferior. When that
2567 requirement will become no longer true, then we can remove this
2569 gdb_assert (inf
== current_inferior ());
2571 prepare_for_detach ();
2573 /* Hold a strong reference because detaching may unpush the
2575 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2577 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2579 process_stratum_target
*proc_target
2580 = as_process_stratum_target (proc_target_ref
.get ());
2582 registers_changed_ptid (proc_target
, save_pid_ptid
);
2584 /* We have to ensure we have no frame cache left. Normally,
2585 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2586 inferior_ptid matches save_pid_ptid, but in our case, it does not
2587 call it, as inferior_ptid has been reset. */
2588 reinit_frame_cache ();
2592 target_disconnect (const char *args
, int from_tty
)
2594 /* If we're in breakpoints-always-inserted mode or if breakpoints
2595 are global across processes, we have to remove them before
2597 remove_breakpoints ();
2599 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2602 /* See target/target.h. */
2605 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2606 target_wait_flags options
)
2608 target_ops
*target
= current_inferior ()->top_target ();
2609 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2611 gdb_assert (!proc_target
->commit_resumed_state
);
2613 if (!target_can_async_p (target
))
2614 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2616 return target
->wait (ptid
, status
, options
);
2622 default_target_wait (struct target_ops
*ops
,
2623 ptid_t ptid
, struct target_waitstatus
*status
,
2624 target_wait_flags options
)
2626 status
->set_ignore ();
2627 return minus_one_ptid
;
2631 target_pid_to_str (ptid_t ptid
)
2633 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2637 target_thread_name (struct thread_info
*info
)
2639 gdb_assert (info
->inf
== current_inferior ());
2641 return current_inferior ()->top_target ()->thread_name (info
);
2644 struct thread_info
*
2645 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2647 struct inferior
*inf
)
2649 target_ops
*target
= current_inferior ()->top_target ();
2651 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2657 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2659 target_ops
*target
= current_inferior ()->top_target ();
2661 return target
->thread_info_to_thread_handle (tip
);
2665 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2667 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2668 gdb_assert (!curr_target
->commit_resumed_state
);
2670 target_dcache_invalidate ();
2672 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2674 registers_changed_ptid (curr_target
, ptid
);
2675 /* We only set the internal executing state here. The user/frontend
2676 running state is set at a higher level. This also clears the
2677 thread's stop_pc as side effect. */
2678 set_executing (curr_target
, ptid
, true);
2679 clear_inline_frame_state (curr_target
, ptid
);
2685 target_commit_resumed ()
2687 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2688 current_inferior ()->top_target ()->commit_resumed ();
2694 target_has_pending_events ()
2696 return current_inferior ()->top_target ()->has_pending_events ();
2700 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2702 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2706 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2708 current_inferior ()->top_target ()->program_signals (program_signals
);
2712 default_follow_fork (struct target_ops
*self
, inferior
*child_inf
,
2713 ptid_t child_ptid
, target_waitkind fork_kind
,
2714 bool follow_child
, bool detach_fork
)
2716 /* Some target returned a fork event, but did not know how to follow it. */
2717 internal_error (__FILE__
, __LINE__
,
2718 _("could not find a target to follow fork"));
2724 target_follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
2725 target_waitkind fork_kind
, bool follow_child
,
2728 target_ops
*target
= current_inferior ()->top_target ();
2730 /* Check consistency between CHILD_INF, CHILD_PTID, FOLLOW_CHILD and
2732 if (child_inf
!= nullptr)
2734 gdb_assert (follow_child
|| !detach_fork
);
2735 gdb_assert (child_inf
->pid
== child_ptid
.pid ());
2738 gdb_assert (!follow_child
&& detach_fork
);
2740 return target
->follow_fork (child_inf
, child_ptid
, fork_kind
, follow_child
,
2747 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2748 const char *execd_pathname
)
2750 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2755 default_mourn_inferior (struct target_ops
*self
)
2757 internal_error (__FILE__
, __LINE__
,
2758 _("could not find a target to follow mourn inferior"));
2762 target_mourn_inferior (ptid_t ptid
)
2764 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2765 current_inferior ()->top_target ()->mourn_inferior ();
2767 /* We no longer need to keep handles on any of the object files.
2768 Make sure to release them to avoid unnecessarily locking any
2769 of them while we're not actually debugging. */
2770 bfd_cache_close_all ();
2773 /* Look for a target which can describe architectural features, starting
2774 from TARGET. If we find one, return its description. */
2776 const struct target_desc
*
2777 target_read_description (struct target_ops
*target
)
2779 return target
->read_description ();
2783 /* Default implementation of memory-searching. */
2786 default_search_memory (struct target_ops
*self
,
2787 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2788 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2789 CORE_ADDR
*found_addrp
)
2791 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2793 return target_read (current_inferior ()->top_target (),
2794 TARGET_OBJECT_MEMORY
, NULL
,
2795 result
, addr
, len
) == len
;
2798 /* Start over from the top of the target stack. */
2799 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2800 pattern
, pattern_len
, found_addrp
);
2803 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2804 sequence of bytes in PATTERN with length PATTERN_LEN.
2806 The result is 1 if found, 0 if not found, and -1 if there was an error
2807 requiring halting of the search (e.g. memory read error).
2808 If the pattern is found the address is recorded in FOUND_ADDRP. */
2811 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2812 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2813 CORE_ADDR
*found_addrp
)
2815 target_ops
*target
= current_inferior ()->top_target ();
2817 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2818 pattern_len
, found_addrp
);
2821 /* Look through the currently pushed targets. If none of them will
2822 be able to restart the currently running process, issue an error
2826 target_require_runnable (void)
2828 for (target_ops
*t
= current_inferior ()->top_target ();
2832 /* If this target knows how to create a new program, then
2833 assume we will still be able to after killing the current
2834 one. Either killing and mourning will not pop T, or else
2835 find_default_run_target will find it again. */
2836 if (t
->can_create_inferior ())
2839 /* Do not worry about targets at certain strata that can not
2840 create inferiors. Assume they will be pushed again if
2841 necessary, and continue to the process_stratum. */
2842 if (t
->stratum () > process_stratum
)
2845 error (_("The \"%s\" target does not support \"run\". "
2846 "Try \"help target\" or \"continue\"."),
2850 /* This function is only called if the target is running. In that
2851 case there should have been a process_stratum target and it
2852 should either know how to create inferiors, or not... */
2853 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2856 /* Whether GDB is allowed to fall back to the default run target for
2857 "run", "attach", etc. when no target is connected yet. */
2858 static bool auto_connect_native_target
= true;
2861 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2862 struct cmd_list_element
*c
, const char *value
)
2864 fprintf_filtered (file
,
2865 _("Whether GDB may automatically connect to the "
2866 "native target is %s.\n"),
2870 /* A pointer to the target that can respond to "run" or "attach".
2871 Native targets are always singletons and instantiated early at GDB
2873 static target_ops
*the_native_target
;
2878 set_native_target (target_ops
*target
)
2880 if (the_native_target
!= NULL
)
2881 internal_error (__FILE__
, __LINE__
,
2882 _("native target already set (\"%s\")."),
2883 the_native_target
->longname ());
2885 the_native_target
= target
;
2891 get_native_target ()
2893 return the_native_target
;
2896 /* Look through the list of possible targets for a target that can
2897 execute a run or attach command without any other data. This is
2898 used to locate the default process stratum.
2900 If DO_MESG is not NULL, the result is always valid (error() is
2901 called for errors); else, return NULL on error. */
2903 static struct target_ops
*
2904 find_default_run_target (const char *do_mesg
)
2906 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2907 return the_native_target
;
2909 if (do_mesg
!= NULL
)
2910 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2917 find_attach_target (void)
2919 /* If a target on the current stack can attach, use it. */
2920 for (target_ops
*t
= current_inferior ()->top_target ();
2924 if (t
->can_attach ())
2928 /* Otherwise, use the default run target for attaching. */
2929 return find_default_run_target ("attach");
2935 find_run_target (void)
2937 /* If a target on the current stack can run, use it. */
2938 for (target_ops
*t
= current_inferior ()->top_target ();
2942 if (t
->can_create_inferior ())
2946 /* Otherwise, use the default run target. */
2947 return find_default_run_target ("run");
2951 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2956 /* Implement the "info proc" command. */
2959 target_info_proc (const char *args
, enum info_proc_what what
)
2961 struct target_ops
*t
;
2963 /* If we're already connected to something that can get us OS
2964 related data, use it. Otherwise, try using the native
2966 t
= find_target_at (process_stratum
);
2968 t
= find_default_run_target (NULL
);
2970 for (; t
!= NULL
; t
= t
->beneath ())
2972 if (t
->info_proc (args
, what
))
2975 fprintf_unfiltered (gdb_stdlog
,
2976 "target_info_proc (\"%s\", %d)\n", args
, what
);
2986 find_default_supports_disable_randomization (struct target_ops
*self
)
2988 struct target_ops
*t
;
2990 t
= find_default_run_target (NULL
);
2992 return t
->supports_disable_randomization ();
2997 target_supports_disable_randomization (void)
2999 return current_inferior ()->top_target ()->supports_disable_randomization ();
3002 /* See target/target.h. */
3005 target_supports_multi_process (void)
3007 return current_inferior ()->top_target ()->supports_multi_process ();
3012 gdb::optional
<gdb::char_vector
>
3013 target_get_osdata (const char *type
)
3015 struct target_ops
*t
;
3017 /* If we're already connected to something that can get us OS
3018 related data, use it. Otherwise, try using the native
3020 t
= find_target_at (process_stratum
);
3022 t
= find_default_run_target ("get OS data");
3027 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3030 /* Determine the current address space of thread PTID. */
3032 struct address_space
*
3033 target_thread_address_space (ptid_t ptid
)
3035 struct address_space
*aspace
;
3037 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3038 gdb_assert (aspace
!= NULL
);
3046 target_ops::beneath () const
3048 return current_inferior ()->find_target_beneath (this);
3052 target_ops::close ()
3057 target_ops::can_attach ()
3063 target_ops::attach (const char *, int)
3065 gdb_assert_not_reached ("target_ops::attach called");
3069 target_ops::can_create_inferior ()
3075 target_ops::create_inferior (const char *, const std::string
&,
3078 gdb_assert_not_reached ("target_ops::create_inferior called");
3082 target_ops::can_run ()
3090 for (target_ops
*t
= current_inferior ()->top_target ();
3101 /* Target file operations. */
3103 static struct target_ops
*
3104 default_fileio_target (void)
3106 struct target_ops
*t
;
3108 /* If we're already connected to something that can perform
3109 file I/O, use it. Otherwise, try using the native target. */
3110 t
= find_target_at (process_stratum
);
3113 return find_default_run_target ("file I/O");
3116 /* File handle for target file operations. */
3120 /* The target on which this file is open. NULL if the target is
3121 meanwhile closed while the handle is open. */
3124 /* The file descriptor on the target. */
3127 /* Check whether this fileio_fh_t represents a closed file. */
3130 return target_fd
< 0;
3134 /* Vector of currently open file handles. The value returned by
3135 target_fileio_open and passed as the FD argument to other
3136 target_fileio_* functions is an index into this vector. This
3137 vector's entries are never freed; instead, files are marked as
3138 closed, and the handle becomes available for reuse. */
3139 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3141 /* Index into fileio_fhandles of the lowest handle that might be
3142 closed. This permits handle reuse without searching the whole
3143 list each time a new file is opened. */
3144 static int lowest_closed_fd
;
3149 fileio_handles_invalidate_target (target_ops
*targ
)
3151 for (fileio_fh_t
&fh
: fileio_fhandles
)
3152 if (fh
.target
== targ
)
3156 /* Acquire a target fileio file descriptor. */
3159 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3161 /* Search for closed handles to reuse. */
3162 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3164 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3166 if (fh
.is_closed ())
3170 /* Push a new handle if no closed handles were found. */
3171 if (lowest_closed_fd
== fileio_fhandles
.size ())
3172 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3174 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3176 /* Should no longer be marked closed. */
3177 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3179 /* Return its index, and start the next lookup at
3181 return lowest_closed_fd
++;
3184 /* Release a target fileio file descriptor. */
3187 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3190 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3193 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3195 static fileio_fh_t
*
3196 fileio_fd_to_fh (int fd
)
3198 return &fileio_fhandles
[fd
];
3202 /* Default implementations of file i/o methods. We don't want these
3203 to delegate automatically, because we need to know which target
3204 supported the method, in order to call it directly from within
3205 pread/pwrite, etc. */
3208 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3209 int flags
, int mode
, int warn_if_slow
,
3212 *target_errno
= FILEIO_ENOSYS
;
3217 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3218 ULONGEST offset
, int *target_errno
)
3220 *target_errno
= FILEIO_ENOSYS
;
3225 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3226 ULONGEST offset
, int *target_errno
)
3228 *target_errno
= FILEIO_ENOSYS
;
3233 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3235 *target_errno
= FILEIO_ENOSYS
;
3240 target_ops::fileio_close (int fd
, int *target_errno
)
3242 *target_errno
= FILEIO_ENOSYS
;
3247 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3250 *target_errno
= FILEIO_ENOSYS
;
3254 gdb::optional
<std::string
>
3255 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3258 *target_errno
= FILEIO_ENOSYS
;
3265 target_fileio_open (struct inferior
*inf
, const char *filename
,
3266 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3268 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3270 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3271 warn_if_slow
, target_errno
);
3273 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3279 fd
= acquire_fileio_fd (t
, fd
);
3282 fprintf_unfiltered (gdb_stdlog
,
3283 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3285 inf
== NULL
? 0 : inf
->num
,
3286 filename
, flags
, mode
,
3288 fd
!= -1 ? 0 : *target_errno
);
3292 *target_errno
= FILEIO_ENOSYS
;
3299 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3300 ULONGEST offset
, int *target_errno
)
3302 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3305 if (fh
->is_closed ())
3306 *target_errno
= EBADF
;
3307 else if (fh
->target
== NULL
)
3308 *target_errno
= EIO
;
3310 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3311 len
, offset
, target_errno
);
3314 fprintf_unfiltered (gdb_stdlog
,
3315 "target_fileio_pwrite (%d,...,%d,%s) "
3317 fd
, len
, pulongest (offset
),
3318 ret
, ret
!= -1 ? 0 : *target_errno
);
3325 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3326 ULONGEST offset
, int *target_errno
)
3328 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3331 if (fh
->is_closed ())
3332 *target_errno
= EBADF
;
3333 else if (fh
->target
== NULL
)
3334 *target_errno
= EIO
;
3336 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3337 len
, offset
, target_errno
);
3340 fprintf_unfiltered (gdb_stdlog
,
3341 "target_fileio_pread (%d,...,%d,%s) "
3343 fd
, len
, pulongest (offset
),
3344 ret
, ret
!= -1 ? 0 : *target_errno
);
3351 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3353 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3356 if (fh
->is_closed ())
3357 *target_errno
= EBADF
;
3358 else if (fh
->target
== NULL
)
3359 *target_errno
= EIO
;
3361 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3364 fprintf_unfiltered (gdb_stdlog
,
3365 "target_fileio_fstat (%d) = %d (%d)\n",
3366 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3373 target_fileio_close (int fd
, int *target_errno
)
3375 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3378 if (fh
->is_closed ())
3379 *target_errno
= EBADF
;
3382 if (fh
->target
!= NULL
)
3383 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3387 release_fileio_fd (fd
, fh
);
3391 fprintf_unfiltered (gdb_stdlog
,
3392 "target_fileio_close (%d) = %d (%d)\n",
3393 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3400 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3403 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3405 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3407 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3411 fprintf_unfiltered (gdb_stdlog
,
3412 "target_fileio_unlink (%d,%s)"
3414 inf
== NULL
? 0 : inf
->num
, filename
,
3415 ret
, ret
!= -1 ? 0 : *target_errno
);
3419 *target_errno
= FILEIO_ENOSYS
;
3425 gdb::optional
<std::string
>
3426 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3429 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3431 gdb::optional
<std::string
> ret
3432 = t
->fileio_readlink (inf
, filename
, target_errno
);
3434 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3438 fprintf_unfiltered (gdb_stdlog
,
3439 "target_fileio_readlink (%d,%s)"
3441 inf
== NULL
? 0 : inf
->num
,
3442 filename
, ret
? ret
->c_str () : "(nil)",
3443 ret
? 0 : *target_errno
);
3447 *target_errno
= FILEIO_ENOSYS
;
3451 /* Like scoped_fd, but specific to target fileio. */
3453 class scoped_target_fd
3456 explicit scoped_target_fd (int fd
) noexcept
3461 ~scoped_target_fd ()
3467 target_fileio_close (m_fd
, &target_errno
);
3471 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3473 int get () const noexcept
3482 /* Read target file FILENAME, in the filesystem as seen by INF. If
3483 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3484 remote targets, the remote stub). Store the result in *BUF_P and
3485 return the size of the transferred data. PADDING additional bytes
3486 are available in *BUF_P. This is a helper function for
3487 target_fileio_read_alloc; see the declaration of that function for
3488 more information. */
3491 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3492 gdb_byte
**buf_p
, int padding
)
3494 size_t buf_alloc
, buf_pos
;
3499 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3500 0700, false, &target_errno
));
3501 if (fd
.get () == -1)
3504 /* Start by reading up to 4K at a time. The target will throttle
3505 this number down if necessary. */
3507 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3511 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3512 buf_alloc
- buf_pos
- padding
, buf_pos
,
3516 /* An error occurred. */
3522 /* Read all there was. */
3532 /* If the buffer is filling up, expand it. */
3533 if (buf_alloc
< buf_pos
* 2)
3536 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3546 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3549 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3554 gdb::unique_xmalloc_ptr
<char>
3555 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3559 LONGEST i
, transferred
;
3561 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3562 bufstr
= (char *) buffer
;
3564 if (transferred
< 0)
3565 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3567 if (transferred
== 0)
3568 return make_unique_xstrdup ("");
3570 bufstr
[transferred
] = 0;
3572 /* Check for embedded NUL bytes; but allow trailing NULs. */
3573 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3576 warning (_("target file %s "
3577 "contained unexpected null characters"),
3582 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3587 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3588 CORE_ADDR addr
, int len
)
3590 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3594 default_watchpoint_addr_within_range (struct target_ops
*target
,
3596 CORE_ADDR start
, int length
)
3598 return addr
>= start
&& addr
< start
+ length
;
3604 target_stack::find_beneath (const target_ops
*t
) const
3606 /* Look for a non-empty slot at stratum levels beneath T's. */
3607 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3608 if (m_stack
[stratum
] != NULL
)
3609 return m_stack
[stratum
];
3617 find_target_at (enum strata stratum
)
3619 return current_inferior ()->target_at (stratum
);
3627 target_announce_detach (int from_tty
)
3630 const char *exec_file
;
3635 exec_file
= get_exec_file (0);
3636 if (exec_file
== NULL
)
3639 pid
= inferior_ptid
.pid ();
3640 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3641 target_pid_to_str (ptid_t (pid
)).c_str ());
3644 /* The inferior process has died. Long live the inferior! */
3647 generic_mourn_inferior (void)
3649 inferior
*inf
= current_inferior ();
3651 switch_to_no_thread ();
3653 /* Mark breakpoints uninserted in case something tries to delete a
3654 breakpoint while we delete the inferior's threads (which would
3655 fail, since the inferior is long gone). */
3656 mark_breakpoints_out ();
3659 exit_inferior (inf
);
3661 /* Note this wipes step-resume breakpoints, so needs to be done
3662 after exit_inferior, which ends up referencing the step-resume
3663 breakpoints through clear_thread_inferior_resources. */
3664 breakpoint_init_inferior (inf_exited
);
3666 registers_changed ();
3668 reopen_exec_file ();
3669 reinit_frame_cache ();
3671 if (deprecated_detach_hook
)
3672 deprecated_detach_hook ();
3675 /* Convert a normal process ID to a string. Returns the string in a
3679 normal_pid_to_str (ptid_t ptid
)
3681 return string_printf ("process %d", ptid
.pid ());
3685 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3687 return normal_pid_to_str (ptid
);
3690 /* Error-catcher for target_find_memory_regions. */
3692 dummy_find_memory_regions (struct target_ops
*self
,
3693 find_memory_region_ftype ignore1
, void *ignore2
)
3695 error (_("Command not implemented for this target."));
3699 /* Error-catcher for target_make_corefile_notes. */
3700 static gdb::unique_xmalloc_ptr
<char>
3701 dummy_make_corefile_notes (struct target_ops
*self
,
3702 bfd
*ignore1
, int *ignore2
)
3704 error (_("Command not implemented for this target."));
3708 #include "target-delegates.c"
3710 /* The initial current target, so that there is always a semi-valid
3713 static dummy_target the_dummy_target
;
3720 return &the_dummy_target
;
3723 static const target_info dummy_target_info
= {
3730 dummy_target::stratum () const
3732 return dummy_stratum
;
3736 debug_target::stratum () const
3738 return debug_stratum
;
3742 dummy_target::info () const
3744 return dummy_target_info
;
3748 debug_target::info () const
3750 return beneath ()->info ();
3756 target_close (struct target_ops
*targ
)
3758 for (inferior
*inf
: all_inferiors ())
3759 gdb_assert (!inf
->target_is_pushed (targ
));
3761 fileio_handles_invalidate_target (targ
);
3766 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3770 target_thread_alive (ptid_t ptid
)
3772 return current_inferior ()->top_target ()->thread_alive (ptid
);
3776 target_update_thread_list (void)
3778 current_inferior ()->top_target ()->update_thread_list ();
3782 target_stop (ptid_t ptid
)
3784 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3786 gdb_assert (!proc_target
->commit_resumed_state
);
3790 warning (_("May not interrupt or stop the target, ignoring attempt"));
3794 current_inferior ()->top_target ()->stop (ptid
);
3802 warning (_("May not interrupt or stop the target, ignoring attempt"));
3806 current_inferior ()->top_target ()->interrupt ();
3812 target_pass_ctrlc (void)
3814 /* Pass the Ctrl-C to the first target that has a thread
3816 for (inferior
*inf
: all_inferiors ())
3818 target_ops
*proc_target
= inf
->process_target ();
3819 if (proc_target
== NULL
)
3822 for (thread_info
*thr
: inf
->non_exited_threads ())
3824 /* A thread can be THREAD_STOPPED and executing, while
3825 running an infcall. */
3826 if (thr
->state
== THREAD_RUNNING
|| thr
->executing ())
3828 /* We can get here quite deep in target layers. Avoid
3829 switching thread context or anything that would
3830 communicate with the target (e.g., to fetch
3831 registers), or flushing e.g., the frame cache. We
3832 just switch inferior in order to be able to call
3833 through the target_stack. */
3834 scoped_restore_current_inferior restore_inferior
;
3835 set_current_inferior (inf
);
3836 current_inferior ()->top_target ()->pass_ctrlc ();
3846 default_target_pass_ctrlc (struct target_ops
*ops
)
3848 target_interrupt ();
3851 /* See target/target.h. */
3854 target_stop_and_wait (ptid_t ptid
)
3856 struct target_waitstatus status
;
3857 bool was_non_stop
= non_stop
;
3862 target_wait (ptid
, &status
, 0);
3864 non_stop
= was_non_stop
;
3867 /* See target/target.h. */
3870 target_continue_no_signal (ptid_t ptid
)
3872 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3875 /* See target/target.h. */
3878 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3880 target_resume (ptid
, 0, signal
);
3883 /* Concatenate ELEM to LIST, a comma-separated list. */
3886 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3888 if (!list
->empty ())
3889 list
->append (", ");
3891 list
->append (elem
);
3894 /* Helper for target_options_to_string. If OPT is present in
3895 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3896 OPT is removed from TARGET_OPTIONS. */
3899 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3900 target_wait_flag opt
, const char *opt_str
)
3902 if ((*target_options
& opt
) != 0)
3904 str_comma_list_concat_elem (ret
, opt_str
);
3905 *target_options
&= ~opt
;
3912 target_options_to_string (target_wait_flags target_options
)
3916 #define DO_TARG_OPTION(OPT) \
3917 do_option (&target_options, &ret, OPT, #OPT)
3919 DO_TARG_OPTION (TARGET_WNOHANG
);
3921 if (target_options
!= 0)
3922 str_comma_list_concat_elem (&ret
, "unknown???");
3928 target_fetch_registers (struct regcache
*regcache
, int regno
)
3930 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3932 regcache
->debug_print_register ("target_fetch_registers", regno
);
3936 target_store_registers (struct regcache
*regcache
, int regno
)
3938 if (!may_write_registers
)
3939 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3941 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3944 regcache
->debug_print_register ("target_store_registers", regno
);
3949 target_core_of_thread (ptid_t ptid
)
3951 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3955 simple_verify_memory (struct target_ops
*ops
,
3956 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3958 LONGEST total_xfered
= 0;
3960 while (total_xfered
< size
)
3962 ULONGEST xfered_len
;
3963 enum target_xfer_status status
;
3965 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3967 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3968 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3970 if (status
== TARGET_XFER_OK
3971 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3973 total_xfered
+= xfered_len
;
3982 /* Default implementation of memory verification. */
3985 default_verify_memory (struct target_ops
*self
,
3986 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3988 /* Start over from the top of the target stack. */
3989 return simple_verify_memory (current_inferior ()->top_target (),
3990 data
, memaddr
, size
);
3994 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3996 target_ops
*target
= current_inferior ()->top_target ();
3998 return target
->verify_memory (data
, memaddr
, size
);
4001 /* The documentation for this function is in its prototype declaration in
4005 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4006 enum target_hw_bp_type rw
)
4008 target_ops
*target
= current_inferior ()->top_target ();
4010 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
4013 /* The documentation for this function is in its prototype declaration in
4017 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4018 enum target_hw_bp_type rw
)
4020 target_ops
*target
= current_inferior ()->top_target ();
4022 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4025 /* The documentation for this function is in its prototype declaration
4029 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4031 target_ops
*target
= current_inferior ()->top_target ();
4033 return target
->masked_watch_num_registers (addr
, mask
);
4036 /* The documentation for this function is in its prototype declaration
4040 target_ranged_break_num_registers (void)
4042 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4047 struct btrace_target_info
*
4048 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
4050 return current_inferior ()->top_target ()->enable_btrace (ptid
, conf
);
4056 target_disable_btrace (struct btrace_target_info
*btinfo
)
4058 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4064 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4066 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4072 target_read_btrace (struct btrace_data
*btrace
,
4073 struct btrace_target_info
*btinfo
,
4074 enum btrace_read_type type
)
4076 target_ops
*target
= current_inferior ()->top_target ();
4078 return target
->read_btrace (btrace
, btinfo
, type
);
4083 const struct btrace_config
*
4084 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4086 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4092 target_stop_recording (void)
4094 current_inferior ()->top_target ()->stop_recording ();
4100 target_save_record (const char *filename
)
4102 current_inferior ()->top_target ()->save_record (filename
);
4108 target_supports_delete_record ()
4110 return current_inferior ()->top_target ()->supports_delete_record ();
4116 target_delete_record (void)
4118 current_inferior ()->top_target ()->delete_record ();
4124 target_record_method (ptid_t ptid
)
4126 return current_inferior ()->top_target ()->record_method (ptid
);
4132 target_record_is_replaying (ptid_t ptid
)
4134 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4140 target_record_will_replay (ptid_t ptid
, int dir
)
4142 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4148 target_record_stop_replaying (void)
4150 current_inferior ()->top_target ()->record_stop_replaying ();
4156 target_goto_record_begin (void)
4158 current_inferior ()->top_target ()->goto_record_begin ();
4164 target_goto_record_end (void)
4166 current_inferior ()->top_target ()->goto_record_end ();
4172 target_goto_record (ULONGEST insn
)
4174 current_inferior ()->top_target ()->goto_record (insn
);
4180 target_insn_history (int size
, gdb_disassembly_flags flags
)
4182 current_inferior ()->top_target ()->insn_history (size
, flags
);
4188 target_insn_history_from (ULONGEST from
, int size
,
4189 gdb_disassembly_flags flags
)
4191 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4197 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4198 gdb_disassembly_flags flags
)
4200 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4206 target_call_history (int size
, record_print_flags flags
)
4208 current_inferior ()->top_target ()->call_history (size
, flags
);
4214 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4216 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4222 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4224 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4229 const struct frame_unwind
*
4230 target_get_unwinder (void)
4232 return current_inferior ()->top_target ()->get_unwinder ();
4237 const struct frame_unwind
*
4238 target_get_tailcall_unwinder (void)
4240 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4246 target_prepare_to_generate_core (void)
4248 current_inferior ()->top_target ()->prepare_to_generate_core ();
4254 target_done_generating_core (void)
4256 current_inferior ()->top_target ()->done_generating_core ();
4261 static char targ_desc
[] =
4262 "Names of targets and files being debugged.\nShows the entire \
4263 stack of targets currently in use (including the exec-file,\n\
4264 core-file, and process, if any), as well as the symbol file name.";
4267 default_rcmd (struct target_ops
*self
, const char *command
,
4268 struct ui_file
*output
)
4270 error (_("\"monitor\" command not supported by this target."));
4274 do_monitor_command (const char *cmd
, int from_tty
)
4276 target_rcmd (cmd
, gdb_stdtarg
);
4279 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4283 flash_erase_command (const char *cmd
, int from_tty
)
4285 /* Used to communicate termination of flash operations to the target. */
4286 bool found_flash_region
= false;
4287 struct gdbarch
*gdbarch
= target_gdbarch ();
4289 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4291 /* Iterate over all memory regions. */
4292 for (const mem_region
&m
: mem_regions
)
4294 /* Is this a flash memory region? */
4295 if (m
.attrib
.mode
== MEM_FLASH
)
4297 found_flash_region
= true;
4298 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4300 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4302 current_uiout
->message (_("Erasing flash memory region at address "));
4303 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4304 current_uiout
->message (", size = ");
4305 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4306 current_uiout
->message ("\n");
4310 /* Did we do any flash operations? If so, we need to finalize them. */
4311 if (found_flash_region
)
4312 target_flash_done ();
4314 current_uiout
->message (_("No flash memory regions found.\n"));
4317 /* Print the name of each layers of our target stack. */
4320 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4322 printf_filtered (_("The current target stack is:\n"));
4324 for (target_ops
*t
= current_inferior ()->top_target ();
4328 if (t
->stratum () == debug_stratum
)
4330 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
4337 target_async (int enable
)
4339 infrun_async (enable
);
4340 current_inferior ()->top_target ()->async (enable
);
4346 target_thread_events (int enable
)
4348 current_inferior ()->top_target ()->thread_events (enable
);
4351 /* Controls if targets can report that they can/are async. This is
4352 just for maintainers to use when debugging gdb. */
4353 bool target_async_permitted
= true;
4355 /* The set command writes to this variable. If the inferior is
4356 executing, target_async_permitted is *not* updated. */
4357 static bool target_async_permitted_1
= true;
4360 maint_set_target_async_command (const char *args
, int from_tty
,
4361 struct cmd_list_element
*c
)
4363 if (have_live_inferiors ())
4365 target_async_permitted_1
= target_async_permitted
;
4366 error (_("Cannot change this setting while the inferior is running."));
4369 target_async_permitted
= target_async_permitted_1
;
4373 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
4374 struct cmd_list_element
*c
,
4377 fprintf_filtered (file
,
4378 _("Controlling the inferior in "
4379 "asynchronous mode is %s.\n"), value
);
4382 /* Return true if the target operates in non-stop mode even with "set
4386 target_always_non_stop_p (void)
4388 return current_inferior ()->top_target ()->always_non_stop_p ();
4394 target_is_non_stop_p ()
4397 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4398 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4399 && target_always_non_stop_p ()))
4400 && target_can_async_p ());
4406 exists_non_stop_target ()
4408 if (target_is_non_stop_p ())
4411 scoped_restore_current_thread restore_thread
;
4413 for (inferior
*inf
: all_inferiors ())
4415 switch_to_inferior_no_thread (inf
);
4416 if (target_is_non_stop_p ())
4423 /* Controls if targets can report that they always run in non-stop
4424 mode. This is just for maintainers to use when debugging gdb. */
4425 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4427 /* The set command writes to this variable. If the inferior is
4428 executing, target_non_stop_enabled is *not* updated. */
4429 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
4431 /* Implementation of "maint set target-non-stop". */
4434 maint_set_target_non_stop_command (const char *args
, int from_tty
,
4435 struct cmd_list_element
*c
)
4437 if (have_live_inferiors ())
4439 target_non_stop_enabled_1
= target_non_stop_enabled
;
4440 error (_("Cannot change this setting while the inferior is running."));
4443 target_non_stop_enabled
= target_non_stop_enabled_1
;
4446 /* Implementation of "maint show target-non-stop". */
4449 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4450 struct cmd_list_element
*c
,
4453 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4454 fprintf_filtered (file
,
4455 _("Whether the target is always in non-stop mode "
4456 "is %s (currently %s).\n"), value
,
4457 target_always_non_stop_p () ? "on" : "off");
4459 fprintf_filtered (file
,
4460 _("Whether the target is always in non-stop mode "
4461 "is %s.\n"), value
);
4464 /* Temporary copies of permission settings. */
4466 static bool may_write_registers_1
= true;
4467 static bool may_write_memory_1
= true;
4468 static bool may_insert_breakpoints_1
= true;
4469 static bool may_insert_tracepoints_1
= true;
4470 static bool may_insert_fast_tracepoints_1
= true;
4471 static bool may_stop_1
= true;
4473 /* Make the user-set values match the real values again. */
4476 update_target_permissions (void)
4478 may_write_registers_1
= may_write_registers
;
4479 may_write_memory_1
= may_write_memory
;
4480 may_insert_breakpoints_1
= may_insert_breakpoints
;
4481 may_insert_tracepoints_1
= may_insert_tracepoints
;
4482 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4483 may_stop_1
= may_stop
;
4486 /* The one function handles (most of) the permission flags in the same
4490 set_target_permissions (const char *args
, int from_tty
,
4491 struct cmd_list_element
*c
)
4493 if (target_has_execution ())
4495 update_target_permissions ();
4496 error (_("Cannot change this setting while the inferior is running."));
4499 /* Make the real values match the user-changed values. */
4500 may_write_registers
= may_write_registers_1
;
4501 may_insert_breakpoints
= may_insert_breakpoints_1
;
4502 may_insert_tracepoints
= may_insert_tracepoints_1
;
4503 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4504 may_stop
= may_stop_1
;
4505 update_observer_mode ();
4508 /* Set memory write permission independently of observer mode. */
4511 set_write_memory_permission (const char *args
, int from_tty
,
4512 struct cmd_list_element
*c
)
4514 /* Make the real values match the user-changed values. */
4515 may_write_memory
= may_write_memory_1
;
4516 update_observer_mode ();
4519 void _initialize_target ();
4522 _initialize_target ()
4524 the_debug_target
= new debug_target ();
4526 add_info ("target", info_target_command
, targ_desc
);
4527 add_info ("files", info_target_command
, targ_desc
);
4529 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4530 Set target debugging."), _("\
4531 Show target debugging."), _("\
4532 When non-zero, target debugging is enabled. Higher numbers are more\n\
4536 &setdebuglist
, &showdebuglist
);
4538 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4539 &trust_readonly
, _("\
4540 Set mode for reading from readonly sections."), _("\
4541 Show mode for reading from readonly sections."), _("\
4542 When this mode is on, memory reads from readonly sections (such as .text)\n\
4543 will be read from the object file instead of from the target. This will\n\
4544 result in significant performance improvement for remote targets."),
4546 show_trust_readonly
,
4547 &setlist
, &showlist
);
4549 add_com ("monitor", class_obscure
, do_monitor_command
,
4550 _("Send a command to the remote monitor (remote targets only)."));
4552 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4553 _("Print the name of each layer of the internal target stack."),
4554 &maintenanceprintlist
);
4556 add_setshow_boolean_cmd ("target-async", no_class
,
4557 &target_async_permitted_1
, _("\
4558 Set whether gdb controls the inferior in asynchronous mode."), _("\
4559 Show whether gdb controls the inferior in asynchronous mode."), _("\
4560 Tells gdb whether to control the inferior in asynchronous mode."),
4561 maint_set_target_async_command
,
4562 maint_show_target_async_command
,
4563 &maintenance_set_cmdlist
,
4564 &maintenance_show_cmdlist
);
4566 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4567 &target_non_stop_enabled_1
, _("\
4568 Set whether gdb always controls the inferior in non-stop mode."), _("\
4569 Show whether gdb always controls the inferior in non-stop mode."), _("\
4570 Tells gdb whether to control the inferior in non-stop mode."),
4571 maint_set_target_non_stop_command
,
4572 maint_show_target_non_stop_command
,
4573 &maintenance_set_cmdlist
,
4574 &maintenance_show_cmdlist
);
4576 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4577 &may_write_registers_1
, _("\
4578 Set permission to write into registers."), _("\
4579 Show permission to write into registers."), _("\
4580 When this permission is on, GDB may write into the target's registers.\n\
4581 Otherwise, any sort of write attempt will result in an error."),
4582 set_target_permissions
, NULL
,
4583 &setlist
, &showlist
);
4585 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4586 &may_write_memory_1
, _("\
4587 Set permission to write into target memory."), _("\
4588 Show permission to write into target memory."), _("\
4589 When this permission is on, GDB may write into the target's memory.\n\
4590 Otherwise, any sort of write attempt will result in an error."),
4591 set_write_memory_permission
, NULL
,
4592 &setlist
, &showlist
);
4594 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4595 &may_insert_breakpoints_1
, _("\
4596 Set permission to insert breakpoints in the target."), _("\
4597 Show permission to insert breakpoints in the target."), _("\
4598 When this permission is on, GDB may insert breakpoints in the program.\n\
4599 Otherwise, any sort of insertion attempt will result in an error."),
4600 set_target_permissions
, NULL
,
4601 &setlist
, &showlist
);
4603 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4604 &may_insert_tracepoints_1
, _("\
4605 Set permission to insert tracepoints in the target."), _("\
4606 Show permission to insert tracepoints in the target."), _("\
4607 When this permission is on, GDB may insert tracepoints in the program.\n\
4608 Otherwise, any sort of insertion attempt will result in an error."),
4609 set_target_permissions
, NULL
,
4610 &setlist
, &showlist
);
4612 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4613 &may_insert_fast_tracepoints_1
, _("\
4614 Set permission to insert fast tracepoints in the target."), _("\
4615 Show permission to insert fast tracepoints in the target."), _("\
4616 When this permission is on, GDB may insert fast tracepoints.\n\
4617 Otherwise, any sort of insertion attempt will result in an error."),
4618 set_target_permissions
, NULL
,
4619 &setlist
, &showlist
);
4621 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4623 Set permission to interrupt or signal the target."), _("\
4624 Show permission to interrupt or signal the target."), _("\
4625 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4626 Otherwise, any attempt to interrupt or stop will be ignored."),
4627 set_target_permissions
, NULL
,
4628 &setlist
, &showlist
);
4630 add_com ("flash-erase", no_class
, flash_erase_command
,
4631 _("Erase all flash memory regions."));
4633 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4634 &auto_connect_native_target
, _("\
4635 Set whether GDB may automatically connect to the native target."), _("\
4636 Show whether GDB may automatically connect to the native target."), _("\
4637 When on, and GDB is not connected to a target yet, GDB\n\
4638 attempts \"run\" and other commands with the native target."),
4639 NULL
, show_auto_connect_native_target
,
4640 &setlist
, &showlist
);