1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2022 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
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_insert_fork_catchpoint (int pid
)
308 return current_inferior ()->top_target ()->insert_fork_catchpoint (pid
);
314 target_remove_fork_catchpoint (int pid
)
316 return current_inferior ()->top_target ()->remove_fork_catchpoint (pid
);
322 target_insert_vfork_catchpoint (int pid
)
324 return current_inferior ()->top_target ()->insert_vfork_catchpoint (pid
);
330 target_remove_vfork_catchpoint (int pid
)
332 return current_inferior ()->top_target ()->remove_vfork_catchpoint (pid
);
338 target_insert_exec_catchpoint (int pid
)
340 return current_inferior ()->top_target ()->insert_exec_catchpoint (pid
);
346 target_remove_exec_catchpoint (int pid
)
348 return current_inferior ()->top_target ()->remove_exec_catchpoint (pid
);
354 target_set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
355 gdb::array_view
<const int> syscall_counts
)
357 target_ops
*target
= current_inferior ()->top_target ();
359 return target
->set_syscall_catchpoint (pid
, needed
, any_count
,
366 target_rcmd (const char *command
, struct ui_file
*outbuf
)
368 return current_inferior ()->top_target ()->rcmd (command
, outbuf
);
374 target_can_lock_scheduler ()
376 target_ops
*target
= current_inferior ()->top_target ();
378 return (target
->get_thread_control_capabilities ()& tc_schedlock
) != 0;
384 target_can_async_p ()
386 return target_can_async_p (current_inferior ()->top_target ());
392 target_can_async_p (struct target_ops
*target
)
394 if (!target_async_permitted
)
396 return target
->can_async_p ();
404 bool result
= current_inferior ()->top_target ()->is_async_p ();
405 gdb_assert (target_async_permitted
|| !result
);
410 target_execution_direction ()
412 return current_inferior ()->top_target ()->execution_direction ();
418 target_extra_thread_info (thread_info
*tp
)
420 return current_inferior ()->top_target ()->extra_thread_info (tp
);
426 target_pid_to_exec_file (int pid
)
428 return current_inferior ()->top_target ()->pid_to_exec_file (pid
);
434 target_thread_architecture (ptid_t ptid
)
436 return current_inferior ()->top_target ()->thread_architecture (ptid
);
442 target_find_memory_regions (find_memory_region_ftype func
, void *data
)
444 return current_inferior ()->top_target ()->find_memory_regions (func
, data
);
449 gdb::unique_xmalloc_ptr
<char>
450 target_make_corefile_notes (bfd
*bfd
, int *size_p
)
452 return current_inferior ()->top_target ()->make_corefile_notes (bfd
, size_p
);
456 target_get_bookmark (const char *args
, int from_tty
)
458 return current_inferior ()->top_target ()->get_bookmark (args
, from_tty
);
462 target_goto_bookmark (const gdb_byte
*arg
, int from_tty
)
464 return current_inferior ()->top_target ()->goto_bookmark (arg
, from_tty
);
470 target_stopped_by_watchpoint ()
472 return current_inferior ()->top_target ()->stopped_by_watchpoint ();
478 target_stopped_by_sw_breakpoint ()
480 return current_inferior ()->top_target ()->stopped_by_sw_breakpoint ();
484 target_supports_stopped_by_sw_breakpoint ()
486 target_ops
*target
= current_inferior ()->top_target ();
488 return target
->supports_stopped_by_sw_breakpoint ();
492 target_stopped_by_hw_breakpoint ()
494 return current_inferior ()->top_target ()->stopped_by_hw_breakpoint ();
498 target_supports_stopped_by_hw_breakpoint ()
500 target_ops
*target
= current_inferior ()->top_target ();
502 return target
->supports_stopped_by_hw_breakpoint ();
508 target_have_steppable_watchpoint ()
510 return current_inferior ()->top_target ()->have_steppable_watchpoint ();
516 target_can_use_hardware_watchpoint (bptype type
, int cnt
, int othertype
)
518 target_ops
*target
= current_inferior ()->top_target ();
520 return target
->can_use_hw_breakpoint (type
, cnt
, othertype
);
526 target_region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
528 target_ops
*target
= current_inferior ()->top_target ();
530 return target
->region_ok_for_hw_watchpoint (addr
, len
);
535 target_can_do_single_step ()
537 return current_inferior ()->top_target ()->can_do_single_step ();
543 target_insert_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
546 target_ops
*target
= current_inferior ()->top_target ();
548 return target
->insert_watchpoint (addr
, len
, type
, cond
);
554 target_remove_watchpoint (CORE_ADDR addr
, int len
, target_hw_bp_type type
,
557 target_ops
*target
= current_inferior ()->top_target ();
559 return target
->remove_watchpoint (addr
, len
, type
, cond
);
565 target_insert_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
567 target_ops
*target
= current_inferior ()->top_target ();
569 return target
->insert_hw_breakpoint (gdbarch
, bp_tgt
);
575 target_remove_hw_breakpoint (gdbarch
*gdbarch
, bp_target_info
*bp_tgt
)
577 target_ops
*target
= current_inferior ()->top_target ();
579 return target
->remove_hw_breakpoint (gdbarch
, bp_tgt
);
585 target_can_accel_watchpoint_condition (CORE_ADDR addr
, int len
, int type
,
588 target_ops
*target
= current_inferior ()->top_target ();
590 return target
->can_accel_watchpoint_condition (addr
, len
, type
, cond
);
596 target_can_execute_reverse ()
598 return current_inferior ()->top_target ()->can_execute_reverse ();
602 target_get_ada_task_ptid (long lwp
, ULONGEST tid
)
604 return current_inferior ()->top_target ()->get_ada_task_ptid (lwp
, tid
);
608 target_filesystem_is_local ()
610 return current_inferior ()->top_target ()->filesystem_is_local ();
616 return current_inferior ()->top_target ()->trace_init ();
620 target_download_tracepoint (bp_location
*location
)
622 return current_inferior ()->top_target ()->download_tracepoint (location
);
626 target_can_download_tracepoint ()
628 return current_inferior ()->top_target ()->can_download_tracepoint ();
632 target_download_trace_state_variable (const trace_state_variable
&tsv
)
634 target_ops
*target
= current_inferior ()->top_target ();
636 return target
->download_trace_state_variable (tsv
);
640 target_enable_tracepoint (bp_location
*loc
)
642 return current_inferior ()->top_target ()->enable_tracepoint (loc
);
646 target_disable_tracepoint (bp_location
*loc
)
648 return current_inferior ()->top_target ()->disable_tracepoint (loc
);
652 target_trace_start ()
654 return current_inferior ()->top_target ()->trace_start ();
658 target_trace_set_readonly_regions ()
660 return current_inferior ()->top_target ()->trace_set_readonly_regions ();
664 target_get_trace_status (trace_status
*ts
)
666 return current_inferior ()->top_target ()->get_trace_status (ts
);
670 target_get_tracepoint_status (breakpoint
*tp
, uploaded_tp
*utp
)
672 return current_inferior ()->top_target ()->get_tracepoint_status (tp
, utp
);
678 return current_inferior ()->top_target ()->trace_stop ();
682 target_trace_find (trace_find_type type
, int num
,
683 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
)
685 target_ops
*target
= current_inferior ()->top_target ();
687 return target
->trace_find (type
, num
, addr1
, addr2
, tpp
);
691 target_get_trace_state_variable_value (int tsv
, LONGEST
*val
)
693 target_ops
*target
= current_inferior ()->top_target ();
695 return target
->get_trace_state_variable_value (tsv
, val
);
699 target_save_trace_data (const char *filename
)
701 return current_inferior ()->top_target ()->save_trace_data (filename
);
705 target_upload_tracepoints (uploaded_tp
**utpp
)
707 return current_inferior ()->top_target ()->upload_tracepoints (utpp
);
711 target_upload_trace_state_variables (uploaded_tsv
**utsvp
)
713 target_ops
*target
= current_inferior ()->top_target ();
715 return target
->upload_trace_state_variables (utsvp
);
719 target_get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
721 target_ops
*target
= current_inferior ()->top_target ();
723 return target
->get_raw_trace_data (buf
, offset
, len
);
727 target_get_min_fast_tracepoint_insn_len ()
729 target_ops
*target
= current_inferior ()->top_target ();
731 return target
->get_min_fast_tracepoint_insn_len ();
735 target_set_disconnected_tracing (int val
)
737 return current_inferior ()->top_target ()->set_disconnected_tracing (val
);
741 target_set_circular_trace_buffer (int val
)
743 return current_inferior ()->top_target ()->set_circular_trace_buffer (val
);
747 target_set_trace_buffer_size (LONGEST val
)
749 return current_inferior ()->top_target ()->set_trace_buffer_size (val
);
753 target_set_trace_notes (const char *user
, const char *notes
,
754 const char *stopnotes
)
756 target_ops
*target
= current_inferior ()->top_target ();
758 return target
->set_trace_notes (user
, notes
, stopnotes
);
762 target_get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
764 return current_inferior ()->top_target ()->get_tib_address (ptid
, addr
);
768 target_set_permissions ()
770 return current_inferior ()->top_target ()->set_permissions ();
774 target_static_tracepoint_marker_at (CORE_ADDR addr
,
775 static_tracepoint_marker
*marker
)
777 target_ops
*target
= current_inferior ()->top_target ();
779 return target
->static_tracepoint_marker_at (addr
, marker
);
782 std::vector
<static_tracepoint_marker
>
783 target_static_tracepoint_markers_by_strid (const char *marker_id
)
785 target_ops
*target
= current_inferior ()->top_target ();
787 return target
->static_tracepoint_markers_by_strid (marker_id
);
791 target_traceframe_info ()
793 return current_inferior ()->top_target ()->traceframe_info ();
797 target_use_agent (bool use
)
799 return current_inferior ()->top_target ()->use_agent (use
);
803 target_can_use_agent ()
805 return current_inferior ()->top_target ()->can_use_agent ();
809 target_augmented_libraries_svr4_read ()
811 return current_inferior ()->top_target ()->augmented_libraries_svr4_read ();
815 target_supports_memory_tagging ()
817 return current_inferior ()->top_target ()->supports_memory_tagging ();
821 target_fetch_memtags (CORE_ADDR address
, size_t len
, gdb::byte_vector
&tags
,
824 return current_inferior ()->top_target ()->fetch_memtags (address
, len
, tags
, type
);
828 target_store_memtags (CORE_ADDR address
, size_t len
,
829 const gdb::byte_vector
&tags
, int type
)
831 return current_inferior ()->top_target ()->store_memtags (address
, len
, tags
, type
);
835 target_log_command (const char *p
)
837 return current_inferior ()->top_target ()->log_command (p
);
840 /* This is used to implement the various target commands. */
843 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
845 auto *ti
= static_cast<target_info
*> (command
->context ());
846 target_open_ftype
*func
= target_factories
[ti
];
849 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
852 func (args
, from_tty
);
855 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
856 ti
->shortname
, args
, from_tty
);
862 add_target (const target_info
&t
, target_open_ftype
*func
,
863 completer_ftype
*completer
)
865 struct cmd_list_element
*c
;
867 auto &func_slot
= target_factories
[&t
];
868 if (func_slot
!= nullptr)
869 internal_error (__FILE__
, __LINE__
,
870 _("target already added (\"%s\")."), t
.shortname
);
873 if (targetlist
== NULL
)
874 add_basic_prefix_cmd ("target", class_run
, _("\
875 Connect to a target machine or process.\n\
876 The first argument is the type or protocol of the target machine.\n\
877 Remaining arguments are interpreted by the target protocol. For more\n\
878 information on the arguments for a particular protocol, type\n\
879 `help target ' followed by the protocol name."),
880 &targetlist
, 0, &cmdlist
);
881 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
882 c
->set_context ((void *) &t
);
883 c
->func
= open_target
;
884 if (completer
!= NULL
)
885 set_cmd_completer (c
, completer
);
891 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
893 struct cmd_list_element
*c
;
895 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
897 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
898 c
->func
= open_target
;
899 c
->set_context ((void *) &tinfo
);
900 gdb::unique_xmalloc_ptr
<char> alt
901 = xstrprintf ("target %s", tinfo
.shortname
);
902 deprecate_cmd (c
, alt
.release ());
910 current_inferior ()->top_target ()->kill ();
914 target_load (const char *arg
, int from_tty
)
916 target_dcache_invalidate ();
917 current_inferior ()->top_target ()->load (arg
, from_tty
);
922 target_terminal_state
target_terminal::m_terminal_state
923 = target_terminal_state::is_ours
;
925 /* See target/target.h. */
928 target_terminal::init (void)
930 current_inferior ()->top_target ()->terminal_init ();
932 m_terminal_state
= target_terminal_state::is_ours
;
935 /* See target/target.h. */
938 target_terminal::inferior (void)
940 struct ui
*ui
= current_ui
;
942 /* A background resume (``run&'') should leave GDB in control of the
944 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
947 /* Since we always run the inferior in the main console (unless "set
948 inferior-tty" is in effect), when some UI other than the main one
949 calls target_terminal::inferior, then we leave the main UI's
950 terminal settings as is. */
954 /* If GDB is resuming the inferior in the foreground, install
955 inferior's terminal modes. */
957 struct inferior
*inf
= current_inferior ();
959 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
961 current_inferior ()->top_target ()->terminal_inferior ();
962 inf
->terminal_state
= target_terminal_state::is_inferior
;
965 m_terminal_state
= target_terminal_state::is_inferior
;
967 /* If the user hit C-c before, pretend that it was hit right
969 if (check_quit_flag ())
970 target_pass_ctrlc ();
973 /* See target/target.h. */
976 target_terminal::restore_inferior (void)
978 struct ui
*ui
= current_ui
;
980 /* See target_terminal::inferior(). */
981 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
984 /* Restore the terminal settings of inferiors that were in the
985 foreground but are now ours_for_output due to a temporary
986 target_target::ours_for_output() call. */
989 scoped_restore_current_inferior restore_inferior
;
991 for (::inferior
*inf
: all_inferiors ())
993 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
995 set_current_inferior (inf
);
996 current_inferior ()->top_target ()->terminal_inferior ();
997 inf
->terminal_state
= target_terminal_state::is_inferior
;
1002 m_terminal_state
= target_terminal_state::is_inferior
;
1004 /* If the user hit C-c before, pretend that it was hit right
1006 if (check_quit_flag ())
1007 target_pass_ctrlc ();
1010 /* Switch terminal state to DESIRED_STATE, either is_ours, or
1011 is_ours_for_output. */
1014 target_terminal_is_ours_kind (target_terminal_state desired_state
)
1016 scoped_restore_current_inferior restore_inferior
;
1018 /* Must do this in two passes. First, have all inferiors save the
1019 current terminal settings. Then, after all inferiors have add a
1020 chance to safely save the terminal settings, restore GDB's
1021 terminal settings. */
1023 for (inferior
*inf
: all_inferiors ())
1025 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
1027 set_current_inferior (inf
);
1028 current_inferior ()->top_target ()->terminal_save_inferior ();
1032 for (inferior
*inf
: all_inferiors ())
1034 /* Note we don't check is_inferior here like above because we
1035 need to handle 'is_ours_for_output -> is_ours' too. Careful
1036 to never transition from 'is_ours' to 'is_ours_for_output',
1038 if (inf
->terminal_state
!= target_terminal_state::is_ours
1039 && inf
->terminal_state
!= desired_state
)
1041 set_current_inferior (inf
);
1042 if (desired_state
== target_terminal_state::is_ours
)
1043 current_inferior ()->top_target ()->terminal_ours ();
1044 else if (desired_state
== target_terminal_state::is_ours_for_output
)
1045 current_inferior ()->top_target ()->terminal_ours_for_output ();
1047 gdb_assert_not_reached ("unhandled desired state");
1048 inf
->terminal_state
= desired_state
;
1053 /* See target/target.h. */
1056 target_terminal::ours ()
1058 struct ui
*ui
= current_ui
;
1060 /* See target_terminal::inferior. */
1064 if (m_terminal_state
== target_terminal_state::is_ours
)
1067 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
1068 m_terminal_state
= target_terminal_state::is_ours
;
1071 /* See target/target.h. */
1074 target_terminal::ours_for_output ()
1076 struct ui
*ui
= current_ui
;
1078 /* See target_terminal::inferior. */
1082 if (!target_terminal::is_inferior ())
1085 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
1086 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
1089 /* See target/target.h. */
1092 target_terminal::info (const char *arg
, int from_tty
)
1094 current_inferior ()->top_target ()->terminal_info (arg
, from_tty
);
1100 target_supports_terminal_ours (void)
1102 /* The current top target is the target at the top of the target
1103 stack of the current inferior. While normally there's always an
1104 inferior, we must check for nullptr here because we can get here
1105 very early during startup, before the initial inferior is first
1107 inferior
*inf
= current_inferior ();
1111 return inf
->top_target ()->supports_terminal_ours ();
1117 error (_("You can't do that when your target is `%s'"),
1118 current_inferior ()->top_target ()->shortname ());
1124 error (_("You can't do that without a process to debug."));
1128 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
1130 printf_filtered (_("No saved terminal information.\n"));
1133 /* A default implementation for the to_get_ada_task_ptid target method.
1135 This function builds the PTID by using both LWP and TID as part of
1136 the PTID lwp and tid elements. The pid used is the pid of the
1140 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, ULONGEST tid
)
1142 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
1145 static enum exec_direction_kind
1146 default_execution_direction (struct target_ops
*self
)
1148 if (!target_can_execute_reverse ())
1149 return EXEC_FORWARD
;
1150 else if (!target_can_async_p ())
1151 return EXEC_FORWARD
;
1153 gdb_assert_not_reached ("\
1154 to_execution_direction must be implemented for reverse async");
1160 decref_target (target_ops
*t
)
1163 if (t
->refcount () == 0)
1165 if (t
->stratum () == process_stratum
)
1166 connection_list_remove (as_process_stratum_target (t
));
1174 target_stack::push (target_ops
*t
)
1178 strata stratum
= t
->stratum ();
1180 if (stratum
== process_stratum
)
1181 connection_list_add (as_process_stratum_target (t
));
1183 /* If there's already a target at this stratum, remove it. */
1185 if (m_stack
[stratum
] != NULL
)
1186 unpush (m_stack
[stratum
]);
1188 /* Now add the new one. */
1189 m_stack
[stratum
] = t
;
1191 if (m_top
< stratum
)
1198 target_stack::unpush (target_ops
*t
)
1200 gdb_assert (t
!= NULL
);
1202 strata stratum
= t
->stratum ();
1204 if (stratum
== dummy_stratum
)
1205 internal_error (__FILE__
, __LINE__
,
1206 _("Attempt to unpush the dummy target"));
1208 /* Look for the specified target. Note that a target can only occur
1209 once in the target stack. */
1211 if (m_stack
[stratum
] != t
)
1213 /* If T wasn't pushed, quit. Only open targets should be
1218 /* Unchain the target. */
1219 m_stack
[stratum
] = NULL
;
1221 if (m_top
== stratum
)
1222 m_top
= this->find_beneath (t
)->stratum ();
1224 /* Finally close the target, if there are no inferiors
1225 referencing this target still. Note we do this after unchaining,
1226 so any target method calls from within the target_close
1227 implementation don't end up in T anymore. Do leave the target
1228 open if we have are other inferiors referencing this target
1235 /* Unpush TARGET and assert that it worked. */
1238 unpush_target_and_assert (struct target_ops
*target
)
1240 if (!current_inferior ()->unpush_target (target
))
1242 fprintf_unfiltered (gdb_stderr
,
1243 "pop_all_targets couldn't find target %s\n",
1244 target
->shortname ());
1245 internal_error (__FILE__
, __LINE__
,
1246 _("failed internal consistency check"));
1251 pop_all_targets_above (enum strata above_stratum
)
1253 while ((int) (current_inferior ()->top_target ()->stratum ())
1254 > (int) above_stratum
)
1255 unpush_target_and_assert (current_inferior ()->top_target ());
1261 pop_all_targets_at_and_above (enum strata stratum
)
1263 while ((int) (current_inferior ()->top_target ()->stratum ())
1265 unpush_target_and_assert (current_inferior ()->top_target ());
1269 pop_all_targets (void)
1271 pop_all_targets_above (dummy_stratum
);
1275 target_unpusher::operator() (struct target_ops
*ops
) const
1277 current_inferior ()->unpush_target (ops
);
1280 /* Default implementation of to_get_thread_local_address. */
1283 generic_tls_error (void)
1285 throw_error (TLS_GENERIC_ERROR
,
1286 _("Cannot find thread-local variables on this target"));
1289 /* Using the objfile specified in OBJFILE, find the address for the
1290 current thread's thread-local storage with offset OFFSET. */
1292 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
1294 volatile CORE_ADDR addr
= 0;
1295 struct target_ops
*target
= current_inferior ()->top_target ();
1296 struct gdbarch
*gdbarch
= target_gdbarch ();
1298 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
1300 ptid_t ptid
= inferior_ptid
;
1306 /* Fetch the load module address for this objfile. */
1307 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
1310 if (gdbarch_get_thread_local_address_p (gdbarch
))
1311 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
1314 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
1316 /* If an error occurred, print TLS related messages here. Otherwise,
1317 throw the error to some higher catcher. */
1318 catch (const gdb_exception
&ex
)
1320 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
1324 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
1325 error (_("Cannot find thread-local variables "
1326 "in this thread library."));
1328 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
1329 if (objfile_is_library
)
1330 error (_("Cannot find shared library `%s' in dynamic"
1331 " linker's load module list"), objfile_name (objfile
));
1333 error (_("Cannot find executable file `%s' in dynamic"
1334 " linker's load module list"), objfile_name (objfile
));
1336 case TLS_NOT_ALLOCATED_YET_ERROR
:
1337 if (objfile_is_library
)
1338 error (_("The inferior has not yet allocated storage for"
1339 " thread-local variables in\n"
1340 "the shared library `%s'\n"
1342 objfile_name (objfile
),
1343 target_pid_to_str (ptid
).c_str ());
1345 error (_("The inferior has not yet allocated storage for"
1346 " thread-local variables in\n"
1347 "the executable `%s'\n"
1349 objfile_name (objfile
),
1350 target_pid_to_str (ptid
).c_str ());
1352 case TLS_GENERIC_ERROR
:
1353 if (objfile_is_library
)
1354 error (_("Cannot find thread-local storage for %s, "
1355 "shared library %s:\n%s"),
1356 target_pid_to_str (ptid
).c_str (),
1357 objfile_name (objfile
), ex
.what ());
1359 error (_("Cannot find thread-local storage for %s, "
1360 "executable file %s:\n%s"),
1361 target_pid_to_str (ptid
).c_str (),
1362 objfile_name (objfile
), ex
.what ());
1371 error (_("Cannot find thread-local variables on this target"));
1377 target_xfer_status_to_string (enum target_xfer_status status
)
1379 #define CASE(X) case X: return #X
1382 CASE(TARGET_XFER_E_IO
);
1383 CASE(TARGET_XFER_UNAVAILABLE
);
1393 gdb::unique_xmalloc_ptr
<char>
1394 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
1396 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
1399 if (bytes_read
== nullptr)
1400 bytes_read
= &ignore
;
1402 /* Note that the endian-ness does not matter here. */
1403 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
1404 &buffer
, bytes_read
);
1408 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
1411 const target_section_table
*
1412 target_get_section_table (struct target_ops
*target
)
1414 return target
->get_section_table ();
1417 /* Find a section containing ADDR. */
1419 const struct target_section
*
1420 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
1422 const target_section_table
*table
= target_get_section_table (target
);
1427 for (const target_section
&secp
: *table
)
1429 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
1437 const target_section_table
*
1438 default_get_section_table ()
1440 return ¤t_program_space
->target_sections ();
1443 /* Helper for the memory xfer routines. Checks the attributes of the
1444 memory region of MEMADDR against the read or write being attempted.
1445 If the access is permitted returns true, otherwise returns false.
1446 REGION_P is an optional output parameter. If not-NULL, it is
1447 filled with a pointer to the memory region of MEMADDR. REG_LEN
1448 returns LEN trimmed to the end of the region. This is how much the
1449 caller can continue requesting, if the access is permitted. A
1450 single xfer request must not straddle memory region boundaries. */
1453 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1454 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
1455 struct mem_region
**region_p
)
1457 struct mem_region
*region
;
1459 region
= lookup_mem_region (memaddr
);
1461 if (region_p
!= NULL
)
1464 switch (region
->attrib
.mode
)
1467 if (writebuf
!= NULL
)
1472 if (readbuf
!= NULL
)
1477 /* We only support writing to flash during "load" for now. */
1478 if (writebuf
!= NULL
)
1479 error (_("Writing to flash memory forbidden in this context"));
1486 /* region->hi == 0 means there's no upper bound. */
1487 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1490 *reg_len
= region
->hi
- memaddr
;
1495 /* Read memory from more than one valid target. A core file, for
1496 instance, could have some of memory but delegate other bits to
1497 the target below it. So, we must manually try all targets. */
1499 enum target_xfer_status
1500 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1501 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1502 ULONGEST
*xfered_len
)
1504 enum target_xfer_status res
;
1508 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1509 readbuf
, writebuf
, memaddr
, len
,
1511 if (res
== TARGET_XFER_OK
)
1514 /* Stop if the target reports that the memory is not available. */
1515 if (res
== TARGET_XFER_UNAVAILABLE
)
1518 /* Don't continue past targets which have all the memory.
1519 At one time, this code was necessary to read data from
1520 executables / shared libraries when data for the requested
1521 addresses weren't available in the core file. But now the
1522 core target handles this case itself. */
1523 if (ops
->has_all_memory ())
1526 ops
= ops
->beneath ();
1528 while (ops
!= NULL
);
1530 /* The cache works at the raw memory level. Make sure the cache
1531 gets updated with raw contents no matter what kind of memory
1532 object was originally being written. Note we do write-through
1533 first, so that if it fails, we don't write to the cache contents
1534 that never made it to the target. */
1535 if (writebuf
!= NULL
1536 && inferior_ptid
!= null_ptid
1537 && target_dcache_init_p ()
1538 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1540 DCACHE
*dcache
= target_dcache_get ();
1542 /* Note that writing to an area of memory which wasn't present
1543 in the cache doesn't cause it to be loaded in. */
1544 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1550 /* Perform a partial memory transfer.
1551 For docs see target.h, to_xfer_partial. */
1553 static enum target_xfer_status
1554 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1555 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1556 ULONGEST len
, ULONGEST
*xfered_len
)
1558 enum target_xfer_status res
;
1560 struct mem_region
*region
;
1561 struct inferior
*inf
;
1563 /* For accesses to unmapped overlay sections, read directly from
1564 files. Must do this first, as MEMADDR may need adjustment. */
1565 if (readbuf
!= NULL
&& overlay_debugging
)
1567 struct obj_section
*section
= find_pc_overlay (memaddr
);
1569 if (pc_in_unmapped_range (memaddr
, section
))
1571 const target_section_table
*table
= target_get_section_table (ops
);
1572 const char *section_name
= section
->the_bfd_section
->name
;
1574 memaddr
= overlay_mapped_address (memaddr
, section
);
1576 auto match_cb
= [=] (const struct target_section
*s
)
1578 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
1581 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1582 memaddr
, len
, xfered_len
,
1587 /* Try the executable files, if "trust-readonly-sections" is set. */
1588 if (readbuf
!= NULL
&& trust_readonly
)
1590 const struct target_section
*secp
1591 = target_section_by_addr (ops
, memaddr
);
1593 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1595 const target_section_table
*table
= target_get_section_table (ops
);
1596 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1597 memaddr
, len
, xfered_len
,
1602 /* Try GDB's internal data cache. */
1604 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1606 return TARGET_XFER_E_IO
;
1608 if (inferior_ptid
!= null_ptid
)
1609 inf
= current_inferior ();
1615 /* The dcache reads whole cache lines; that doesn't play well
1616 with reading from a trace buffer, because reading outside of
1617 the collected memory range fails. */
1618 && get_traceframe_number () == -1
1619 && (region
->attrib
.cache
1620 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1621 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1623 DCACHE
*dcache
= target_dcache_get_or_init ();
1625 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1626 reg_len
, xfered_len
);
1629 /* If none of those methods found the memory we wanted, fall back
1630 to a target partial transfer. Normally a single call to
1631 to_xfer_partial is enough; if it doesn't recognize an object
1632 it will call the to_xfer_partial of the next target down.
1633 But for memory this won't do. Memory is the only target
1634 object which can be read from more than one valid target.
1635 A core file, for instance, could have some of memory but
1636 delegate other bits to the target below it. So, we must
1637 manually try all targets. */
1639 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1642 /* If we still haven't got anything, return the last error. We
1647 /* Perform a partial memory transfer. For docs see target.h,
1650 static enum target_xfer_status
1651 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1652 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1653 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1655 enum target_xfer_status res
;
1657 /* Zero length requests are ok and require no work. */
1659 return TARGET_XFER_EOF
;
1661 memaddr
= address_significant (target_gdbarch (), memaddr
);
1663 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1664 breakpoint insns, thus hiding out from higher layers whether
1665 there are software breakpoints inserted in the code stream. */
1666 if (readbuf
!= NULL
)
1668 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1671 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1672 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1676 /* A large write request is likely to be partially satisfied
1677 by memory_xfer_partial_1. We will continually malloc
1678 and free a copy of the entire write request for breakpoint
1679 shadow handling even though we only end up writing a small
1680 subset of it. Cap writes to a limit specified by the target
1681 to mitigate this. */
1682 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1684 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1685 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1686 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1693 scoped_restore_tmpl
<int>
1694 make_scoped_restore_show_memory_breakpoints (int show
)
1696 return make_scoped_restore (&show_memory_breakpoints
, show
);
1699 /* For docs see target.h, to_xfer_partial. */
1701 enum target_xfer_status
1702 target_xfer_partial (struct target_ops
*ops
,
1703 enum target_object object
, const char *annex
,
1704 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1705 ULONGEST offset
, ULONGEST len
,
1706 ULONGEST
*xfered_len
)
1708 enum target_xfer_status retval
;
1710 /* Transfer is done when LEN is zero. */
1712 return TARGET_XFER_EOF
;
1714 if (writebuf
&& !may_write_memory
)
1715 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1716 core_addr_to_string_nz (offset
), plongest (len
));
1720 /* If this is a memory transfer, let the memory-specific code
1721 have a look at it instead. Memory transfers are more
1723 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1724 || object
== TARGET_OBJECT_CODE_MEMORY
)
1725 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1726 writebuf
, offset
, len
, xfered_len
);
1727 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1729 /* Skip/avoid accessing the target if the memory region
1730 attributes block the access. Check this here instead of in
1731 raw_memory_xfer_partial as otherwise we'd end up checking
1732 this twice in the case of the memory_xfer_partial path is
1733 taken; once before checking the dcache, and another in the
1734 tail call to raw_memory_xfer_partial. */
1735 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1737 return TARGET_XFER_E_IO
;
1739 /* Request the normal memory object from other layers. */
1740 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1744 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1745 writebuf
, offset
, len
, xfered_len
);
1749 const unsigned char *myaddr
= NULL
;
1751 fprintf_unfiltered (gdb_stdlog
,
1752 "%s:target_xfer_partial "
1753 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1756 (annex
? annex
: "(null)"),
1757 host_address_to_string (readbuf
),
1758 host_address_to_string (writebuf
),
1759 core_addr_to_string_nz (offset
),
1760 pulongest (len
), retval
,
1761 pulongest (*xfered_len
));
1767 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1771 fputs_unfiltered (", bytes =", gdb_stdlog
);
1772 for (i
= 0; i
< *xfered_len
; i
++)
1774 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1776 if (targetdebug
< 2 && i
> 0)
1778 fprintf_unfiltered (gdb_stdlog
, " ...");
1781 fprintf_unfiltered (gdb_stdlog
, "\n");
1784 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1788 fputc_unfiltered ('\n', gdb_stdlog
);
1791 /* Check implementations of to_xfer_partial update *XFERED_LEN
1792 properly. Do assertion after printing debug messages, so that we
1793 can find more clues on assertion failure from debugging messages. */
1794 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1795 gdb_assert (*xfered_len
> 0);
1800 /* Read LEN bytes of target memory at address MEMADDR, placing the
1801 results in GDB's memory at MYADDR. Returns either 0 for success or
1802 -1 if any error occurs.
1804 If an error occurs, no guarantee is made about the contents of the data at
1805 MYADDR. In particular, the caller should not depend upon partial reads
1806 filling the buffer with good data. There is no way for the caller to know
1807 how much good data might have been transfered anyway. Callers that can
1808 deal with partial reads should call target_read (which will retry until
1809 it makes no progress, and then return how much was transferred). */
1812 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1814 if (target_read (current_inferior ()->top_target (),
1815 TARGET_OBJECT_MEMORY
, NULL
,
1816 myaddr
, memaddr
, len
) == len
)
1822 /* See target/target.h. */
1825 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1830 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1833 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1834 gdbarch_byte_order (target_gdbarch ()));
1838 /* Like target_read_memory, but specify explicitly that this is a read
1839 from the target's raw memory. That is, this read bypasses the
1840 dcache, breakpoint shadowing, etc. */
1843 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1845 if (target_read (current_inferior ()->top_target (),
1846 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1847 myaddr
, memaddr
, len
) == len
)
1853 /* Like target_read_memory, but specify explicitly that this is a read from
1854 the target's stack. This may trigger different cache behavior. */
1857 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1859 if (target_read (current_inferior ()->top_target (),
1860 TARGET_OBJECT_STACK_MEMORY
, NULL
,
1861 myaddr
, memaddr
, len
) == len
)
1867 /* Like target_read_memory, but specify explicitly that this is a read from
1868 the target's code. This may trigger different cache behavior. */
1871 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1873 if (target_read (current_inferior ()->top_target (),
1874 TARGET_OBJECT_CODE_MEMORY
, NULL
,
1875 myaddr
, memaddr
, len
) == len
)
1881 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1882 Returns either 0 for success or -1 if any error occurs. If an
1883 error occurs, no guarantee is made about how much data got written.
1884 Callers that can deal with partial writes should call
1888 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1890 if (target_write (current_inferior ()->top_target (),
1891 TARGET_OBJECT_MEMORY
, NULL
,
1892 myaddr
, memaddr
, len
) == len
)
1898 /* Write LEN bytes from MYADDR to target raw memory at address
1899 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1900 If an error occurs, no guarantee is made about how much data got
1901 written. Callers that can deal with partial writes should call
1905 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1907 if (target_write (current_inferior ()->top_target (),
1908 TARGET_OBJECT_RAW_MEMORY
, NULL
,
1909 myaddr
, memaddr
, len
) == len
)
1915 /* Fetch the target's memory map. */
1917 std::vector
<mem_region
>
1918 target_memory_map (void)
1920 target_ops
*target
= current_inferior ()->top_target ();
1921 std::vector
<mem_region
> result
= target
->memory_map ();
1922 if (result
.empty ())
1925 std::sort (result
.begin (), result
.end ());
1927 /* Check that regions do not overlap. Simultaneously assign
1928 a numbering for the "mem" commands to use to refer to
1930 mem_region
*last_one
= NULL
;
1931 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1933 mem_region
*this_one
= &result
[ix
];
1934 this_one
->number
= ix
;
1936 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1938 warning (_("Overlapping regions in memory map: ignoring"));
1939 return std::vector
<mem_region
> ();
1942 last_one
= this_one
;
1949 target_flash_erase (ULONGEST address
, LONGEST length
)
1951 current_inferior ()->top_target ()->flash_erase (address
, length
);
1955 target_flash_done (void)
1957 current_inferior ()->top_target ()->flash_done ();
1961 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1962 struct cmd_list_element
*c
, const char *value
)
1964 fprintf_filtered (file
,
1965 _("Mode for reading from readonly sections is %s.\n"),
1969 /* Target vector read/write partial wrapper functions. */
1971 static enum target_xfer_status
1972 target_read_partial (struct target_ops
*ops
,
1973 enum target_object object
,
1974 const char *annex
, gdb_byte
*buf
,
1975 ULONGEST offset
, ULONGEST len
,
1976 ULONGEST
*xfered_len
)
1978 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1982 static enum target_xfer_status
1983 target_write_partial (struct target_ops
*ops
,
1984 enum target_object object
,
1985 const char *annex
, const gdb_byte
*buf
,
1986 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1988 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1992 /* Wrappers to perform the full transfer. */
1994 /* For docs on target_read see target.h. */
1997 target_read (struct target_ops
*ops
,
1998 enum target_object object
,
1999 const char *annex
, gdb_byte
*buf
,
2000 ULONGEST offset
, LONGEST len
)
2002 LONGEST xfered_total
= 0;
2005 /* If we are reading from a memory object, find the length of an addressable
2006 unit for that architecture. */
2007 if (object
== TARGET_OBJECT_MEMORY
2008 || object
== TARGET_OBJECT_STACK_MEMORY
2009 || object
== TARGET_OBJECT_CODE_MEMORY
2010 || object
== TARGET_OBJECT_RAW_MEMORY
)
2011 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2013 while (xfered_total
< len
)
2015 ULONGEST xfered_partial
;
2016 enum target_xfer_status status
;
2018 status
= target_read_partial (ops
, object
, annex
,
2019 buf
+ xfered_total
* unit_size
,
2020 offset
+ xfered_total
, len
- xfered_total
,
2023 /* Call an observer, notifying them of the xfer progress? */
2024 if (status
== TARGET_XFER_EOF
)
2025 return xfered_total
;
2026 else if (status
== TARGET_XFER_OK
)
2028 xfered_total
+= xfered_partial
;
2032 return TARGET_XFER_E_IO
;
2038 /* Assuming that the entire [begin, end) range of memory cannot be
2039 read, try to read whatever subrange is possible to read.
2041 The function returns, in RESULT, either zero or one memory block.
2042 If there's a readable subrange at the beginning, it is completely
2043 read and returned. Any further readable subrange will not be read.
2044 Otherwise, if there's a readable subrange at the end, it will be
2045 completely read and returned. Any readable subranges before it
2046 (obviously, not starting at the beginning), will be ignored. In
2047 other cases -- either no readable subrange, or readable subrange(s)
2048 that is neither at the beginning, or end, nothing is returned.
2050 The purpose of this function is to handle a read across a boundary
2051 of accessible memory in a case when memory map is not available.
2052 The above restrictions are fine for this case, but will give
2053 incorrect results if the memory is 'patchy'. However, supporting
2054 'patchy' memory would require trying to read every single byte,
2055 and it seems unacceptable solution. Explicit memory map is
2056 recommended for this case -- and target_read_memory_robust will
2057 take care of reading multiple ranges then. */
2060 read_whatever_is_readable (struct target_ops
*ops
,
2061 const ULONGEST begin
, const ULONGEST end
,
2063 std::vector
<memory_read_result
> *result
)
2065 ULONGEST current_begin
= begin
;
2066 ULONGEST current_end
= end
;
2068 ULONGEST xfered_len
;
2070 /* If we previously failed to read 1 byte, nothing can be done here. */
2071 if (end
- begin
<= 1)
2074 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
2076 /* Check that either first or the last byte is readable, and give up
2077 if not. This heuristic is meant to permit reading accessible memory
2078 at the boundary of accessible region. */
2079 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2080 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
2085 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2086 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
2087 &xfered_len
) == TARGET_XFER_OK
)
2095 /* Loop invariant is that the [current_begin, current_end) was previously
2096 found to be not readable as a whole.
2098 Note loop condition -- if the range has 1 byte, we can't divide the range
2099 so there's no point trying further. */
2100 while (current_end
- current_begin
> 1)
2102 ULONGEST first_half_begin
, first_half_end
;
2103 ULONGEST second_half_begin
, second_half_end
;
2105 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
2109 first_half_begin
= current_begin
;
2110 first_half_end
= middle
;
2111 second_half_begin
= middle
;
2112 second_half_end
= current_end
;
2116 first_half_begin
= middle
;
2117 first_half_end
= current_end
;
2118 second_half_begin
= current_begin
;
2119 second_half_end
= middle
;
2122 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2123 buf
.get () + (first_half_begin
- begin
) * unit_size
,
2125 first_half_end
- first_half_begin
);
2127 if (xfer
== first_half_end
- first_half_begin
)
2129 /* This half reads up fine. So, the error must be in the
2131 current_begin
= second_half_begin
;
2132 current_end
= second_half_end
;
2136 /* This half is not readable. Because we've tried one byte, we
2137 know some part of this half if actually readable. Go to the next
2138 iteration to divide again and try to read.
2140 We don't handle the other half, because this function only tries
2141 to read a single readable subrange. */
2142 current_begin
= first_half_begin
;
2143 current_end
= first_half_end
;
2149 /* The [begin, current_begin) range has been read. */
2150 result
->emplace_back (begin
, current_end
, std::move (buf
));
2154 /* The [current_end, end) range has been read. */
2155 LONGEST region_len
= end
- current_end
;
2157 gdb::unique_xmalloc_ptr
<gdb_byte
> data
2158 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
2159 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
2160 region_len
* unit_size
);
2161 result
->emplace_back (current_end
, end
, std::move (data
));
2165 std::vector
<memory_read_result
>
2166 read_memory_robust (struct target_ops
*ops
,
2167 const ULONGEST offset
, const LONGEST len
)
2169 std::vector
<memory_read_result
> result
;
2170 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2172 LONGEST xfered_total
= 0;
2173 while (xfered_total
< len
)
2175 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
2178 /* If there is no explicit region, a fake one should be created. */
2179 gdb_assert (region
);
2181 if (region
->hi
== 0)
2182 region_len
= len
- xfered_total
;
2184 region_len
= region
->hi
- offset
;
2186 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
2188 /* Cannot read this region. Note that we can end up here only
2189 if the region is explicitly marked inaccessible, or
2190 'inaccessible-by-default' is in effect. */
2191 xfered_total
+= region_len
;
2195 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
2196 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
2197 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
2199 LONGEST xfered_partial
=
2200 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
2201 offset
+ xfered_total
, to_read
);
2202 /* Call an observer, notifying them of the xfer progress? */
2203 if (xfered_partial
<= 0)
2205 /* Got an error reading full chunk. See if maybe we can read
2207 read_whatever_is_readable (ops
, offset
+ xfered_total
,
2208 offset
+ xfered_total
+ to_read
,
2209 unit_size
, &result
);
2210 xfered_total
+= to_read
;
2214 result
.emplace_back (offset
+ xfered_total
,
2215 offset
+ xfered_total
+ xfered_partial
,
2216 std::move (buffer
));
2217 xfered_total
+= xfered_partial
;
2227 /* An alternative to target_write with progress callbacks. */
2230 target_write_with_progress (struct target_ops
*ops
,
2231 enum target_object object
,
2232 const char *annex
, const gdb_byte
*buf
,
2233 ULONGEST offset
, LONGEST len
,
2234 void (*progress
) (ULONGEST
, void *), void *baton
)
2236 LONGEST xfered_total
= 0;
2239 /* If we are writing to a memory object, find the length of an addressable
2240 unit for that architecture. */
2241 if (object
== TARGET_OBJECT_MEMORY
2242 || object
== TARGET_OBJECT_STACK_MEMORY
2243 || object
== TARGET_OBJECT_CODE_MEMORY
2244 || object
== TARGET_OBJECT_RAW_MEMORY
)
2245 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
2247 /* Give the progress callback a chance to set up. */
2249 (*progress
) (0, baton
);
2251 while (xfered_total
< len
)
2253 ULONGEST xfered_partial
;
2254 enum target_xfer_status status
;
2256 status
= target_write_partial (ops
, object
, annex
,
2257 buf
+ xfered_total
* unit_size
,
2258 offset
+ xfered_total
, len
- xfered_total
,
2261 if (status
!= TARGET_XFER_OK
)
2262 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
2265 (*progress
) (xfered_partial
, baton
);
2267 xfered_total
+= xfered_partial
;
2273 /* For docs on target_write see target.h. */
2276 target_write (struct target_ops
*ops
,
2277 enum target_object object
,
2278 const char *annex
, const gdb_byte
*buf
,
2279 ULONGEST offset
, LONGEST len
)
2281 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
2285 /* Help for target_read_alloc and target_read_stralloc. See their comments
2288 template <typename T
>
2289 gdb::optional
<gdb::def_vector
<T
>>
2290 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
2293 gdb::def_vector
<T
> buf
;
2295 const int chunk
= 4096;
2297 /* This function does not have a length parameter; it reads the
2298 entire OBJECT). Also, it doesn't support objects fetched partly
2299 from one target and partly from another (in a different stratum,
2300 e.g. a core file and an executable). Both reasons make it
2301 unsuitable for reading memory. */
2302 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
2304 /* Start by reading up to 4K at a time. The target will throttle
2305 this number down if necessary. */
2308 ULONGEST xfered_len
;
2309 enum target_xfer_status status
;
2311 buf
.resize (buf_pos
+ chunk
);
2313 status
= target_read_partial (ops
, object
, annex
,
2314 (gdb_byte
*) &buf
[buf_pos
],
2318 if (status
== TARGET_XFER_EOF
)
2320 /* Read all there was. */
2321 buf
.resize (buf_pos
);
2324 else if (status
!= TARGET_XFER_OK
)
2326 /* An error occurred. */
2330 buf_pos
+= xfered_len
;
2338 gdb::optional
<gdb::byte_vector
>
2339 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
2342 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
2347 gdb::optional
<gdb::char_vector
>
2348 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
2351 gdb::optional
<gdb::char_vector
> buf
2352 = target_read_alloc_1
<char> (ops
, object
, annex
);
2357 if (buf
->empty () || buf
->back () != '\0')
2358 buf
->push_back ('\0');
2360 /* Check for embedded NUL bytes; but allow trailing NULs. */
2361 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
2362 it
!= buf
->end (); it
++)
2365 warning (_("target object %d, annex %s, "
2366 "contained unexpected null characters"),
2367 (int) object
, annex
? annex
: "(none)");
2374 /* Memory transfer methods. */
2377 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
2380 /* This method is used to read from an alternate, non-current
2381 target. This read must bypass the overlay support (as symbols
2382 don't match this target), and GDB's internal cache (wrong cache
2383 for this target). */
2384 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
2386 memory_error (TARGET_XFER_E_IO
, addr
);
2390 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
2391 int len
, enum bfd_endian byte_order
)
2393 gdb_byte buf
[sizeof (ULONGEST
)];
2395 gdb_assert (len
<= sizeof (buf
));
2396 get_target_memory (ops
, addr
, buf
, len
);
2397 return extract_unsigned_integer (buf
, len
, byte_order
);
2403 target_insert_breakpoint (struct gdbarch
*gdbarch
,
2404 struct bp_target_info
*bp_tgt
)
2406 if (!may_insert_breakpoints
)
2408 warning (_("May not insert breakpoints"));
2412 target_ops
*target
= current_inferior ()->top_target ();
2414 return target
->insert_breakpoint (gdbarch
, bp_tgt
);
2420 target_remove_breakpoint (struct gdbarch
*gdbarch
,
2421 struct bp_target_info
*bp_tgt
,
2422 enum remove_bp_reason reason
)
2424 /* This is kind of a weird case to handle, but the permission might
2425 have been changed after breakpoints were inserted - in which case
2426 we should just take the user literally and assume that any
2427 breakpoints should be left in place. */
2428 if (!may_insert_breakpoints
)
2430 warning (_("May not remove breakpoints"));
2434 target_ops
*target
= current_inferior ()->top_target ();
2436 return target
->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
2440 info_target_command (const char *args
, int from_tty
)
2442 int has_all_mem
= 0;
2444 if (current_program_space
->symfile_object_file
!= NULL
)
2446 objfile
*objf
= current_program_space
->symfile_object_file
;
2447 printf_filtered (_("Symbols from \"%s\".\n"),
2448 objfile_name (objf
));
2451 for (target_ops
*t
= current_inferior ()->top_target ();
2455 if (!t
->has_memory ())
2458 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
2461 printf_filtered (_("\tWhile running this, "
2462 "GDB does not access memory from...\n"));
2463 printf_filtered ("%s:\n", t
->longname ());
2465 has_all_mem
= t
->has_all_memory ();
2469 /* This function is called before any new inferior is created, e.g.
2470 by running a program, attaching, or connecting to a target.
2471 It cleans up any state from previous invocations which might
2472 change between runs. This is a subset of what target_preopen
2473 resets (things which might change between targets). */
2476 target_pre_inferior (int from_tty
)
2478 /* Clear out solib state. Otherwise the solib state of the previous
2479 inferior might have survived and is entirely wrong for the new
2480 target. This has been observed on GNU/Linux using glibc 2.3. How
2492 Cannot access memory at address 0xdeadbeef
2495 /* In some OSs, the shared library list is the same/global/shared
2496 across inferiors. If code is shared between processes, so are
2497 memory regions and features. */
2498 if (!gdbarch_has_global_solist (target_gdbarch ()))
2500 no_shared_libraries (NULL
, from_tty
);
2502 invalidate_target_mem_regions ();
2504 target_clear_description ();
2507 /* attach_flag may be set if the previous process associated with
2508 the inferior was attached to. */
2509 current_inferior ()->attach_flag
= 0;
2511 current_inferior ()->highest_thread_num
= 0;
2513 agent_capability_invalidate ();
2516 /* This is to be called by the open routine before it does
2520 target_preopen (int from_tty
)
2524 if (current_inferior ()->pid
!= 0)
2527 || !target_has_execution ()
2528 || query (_("A program is being debugged already. Kill it? ")))
2530 /* Core inferiors actually should be detached, not
2532 if (target_has_execution ())
2535 target_detach (current_inferior (), 0);
2538 error (_("Program not killed."));
2541 /* Calling target_kill may remove the target from the stack. But if
2542 it doesn't (which seems like a win for UDI), remove it now. */
2543 /* Leave the exec target, though. The user may be switching from a
2544 live process to a core of the same program. */
2545 pop_all_targets_above (file_stratum
);
2547 target_pre_inferior (from_tty
);
2553 target_detach (inferior
*inf
, int from_tty
)
2555 /* After we have detached, we will clear the register cache for this inferior
2556 by calling registers_changed_ptid. We must save the pid_ptid before
2557 detaching, as the target detach method will clear inf->pid. */
2558 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2560 /* As long as some to_detach implementations rely on the current_inferior
2561 (either directly, or indirectly, like through target_gdbarch or by
2562 reading memory), INF needs to be the current inferior. When that
2563 requirement will become no longer true, then we can remove this
2565 gdb_assert (inf
== current_inferior ());
2567 prepare_for_detach ();
2569 /* Hold a strong reference because detaching may unpush the
2571 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2573 current_inferior ()->top_target ()->detach (inf
, from_tty
);
2575 process_stratum_target
*proc_target
2576 = as_process_stratum_target (proc_target_ref
.get ());
2578 registers_changed_ptid (proc_target
, save_pid_ptid
);
2580 /* We have to ensure we have no frame cache left. Normally,
2581 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2582 inferior_ptid matches save_pid_ptid, but in our case, it does not
2583 call it, as inferior_ptid has been reset. */
2584 reinit_frame_cache ();
2588 target_disconnect (const char *args
, int from_tty
)
2590 /* If we're in breakpoints-always-inserted mode or if breakpoints
2591 are global across processes, we have to remove them before
2593 remove_breakpoints ();
2595 current_inferior ()->top_target ()->disconnect (args
, from_tty
);
2598 /* See target/target.h. */
2601 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
2602 target_wait_flags options
)
2604 target_ops
*target
= current_inferior ()->top_target ();
2605 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
2607 gdb_assert (!proc_target
->commit_resumed_state
);
2609 if (!target_can_async_p (target
))
2610 gdb_assert ((options
& TARGET_WNOHANG
) == 0);
2612 return target
->wait (ptid
, status
, options
);
2618 default_target_wait (struct target_ops
*ops
,
2619 ptid_t ptid
, struct target_waitstatus
*status
,
2620 target_wait_flags options
)
2622 status
->set_ignore ();
2623 return minus_one_ptid
;
2627 target_pid_to_str (ptid_t ptid
)
2629 return current_inferior ()->top_target ()->pid_to_str (ptid
);
2633 target_thread_name (struct thread_info
*info
)
2635 gdb_assert (info
->inf
== current_inferior ());
2637 return current_inferior ()->top_target ()->thread_name (info
);
2640 struct thread_info
*
2641 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2643 struct inferior
*inf
)
2645 target_ops
*target
= current_inferior ()->top_target ();
2647 return target
->thread_handle_to_thread_info (thread_handle
, handle_len
, inf
);
2653 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2655 target_ops
*target
= current_inferior ()->top_target ();
2657 return target
->thread_info_to_thread_handle (tip
);
2661 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2663 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2664 gdb_assert (!curr_target
->commit_resumed_state
);
2666 target_dcache_invalidate ();
2668 current_inferior ()->top_target ()->resume (ptid
, step
, signal
);
2670 registers_changed_ptid (curr_target
, ptid
);
2671 /* We only set the internal executing state here. The user/frontend
2672 running state is set at a higher level. This also clears the
2673 thread's stop_pc as side effect. */
2674 set_executing (curr_target
, ptid
, true);
2675 clear_inline_frame_state (curr_target
, ptid
);
2681 target_commit_resumed ()
2683 gdb_assert (current_inferior ()->process_target ()->commit_resumed_state
);
2684 current_inferior ()->top_target ()->commit_resumed ();
2690 target_has_pending_events ()
2692 return current_inferior ()->top_target ()->has_pending_events ();
2696 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2698 current_inferior ()->top_target ()->pass_signals (pass_signals
);
2702 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2704 current_inferior ()->top_target ()->program_signals (program_signals
);
2708 default_follow_fork (struct target_ops
*self
, inferior
*child_inf
,
2709 ptid_t child_ptid
, target_waitkind fork_kind
,
2710 bool follow_child
, bool detach_fork
)
2712 /* Some target returned a fork event, but did not know how to follow it. */
2713 internal_error (__FILE__
, __LINE__
,
2714 _("could not find a target to follow fork"));
2720 target_follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
2721 target_waitkind fork_kind
, bool follow_child
,
2724 target_ops
*target
= current_inferior ()->top_target ();
2726 /* Check consistency between CHILD_INF, CHILD_PTID, FOLLOW_CHILD and
2728 if (child_inf
!= nullptr)
2730 gdb_assert (follow_child
|| !detach_fork
);
2731 gdb_assert (child_inf
->pid
== child_ptid
.pid ());
2734 gdb_assert (!follow_child
&& detach_fork
);
2736 return target
->follow_fork (child_inf
, child_ptid
, fork_kind
, follow_child
,
2743 target_follow_exec (inferior
*follow_inf
, ptid_t ptid
,
2744 const char *execd_pathname
)
2746 current_inferior ()->top_target ()->follow_exec (follow_inf
, ptid
,
2751 default_mourn_inferior (struct target_ops
*self
)
2753 internal_error (__FILE__
, __LINE__
,
2754 _("could not find a target to follow mourn inferior"));
2758 target_mourn_inferior (ptid_t ptid
)
2760 gdb_assert (ptid
.pid () == inferior_ptid
.pid ());
2761 current_inferior ()->top_target ()->mourn_inferior ();
2763 /* We no longer need to keep handles on any of the object files.
2764 Make sure to release them to avoid unnecessarily locking any
2765 of them while we're not actually debugging. */
2766 bfd_cache_close_all ();
2769 /* Look for a target which can describe architectural features, starting
2770 from TARGET. If we find one, return its description. */
2772 const struct target_desc
*
2773 target_read_description (struct target_ops
*target
)
2775 return target
->read_description ();
2779 /* Default implementation of memory-searching. */
2782 default_search_memory (struct target_ops
*self
,
2783 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2784 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2785 CORE_ADDR
*found_addrp
)
2787 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2789 return target_read (current_inferior ()->top_target (),
2790 TARGET_OBJECT_MEMORY
, NULL
,
2791 result
, addr
, len
) == len
;
2794 /* Start over from the top of the target stack. */
2795 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2796 pattern
, pattern_len
, found_addrp
);
2799 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2800 sequence of bytes in PATTERN with length PATTERN_LEN.
2802 The result is 1 if found, 0 if not found, and -1 if there was an error
2803 requiring halting of the search (e.g. memory read error).
2804 If the pattern is found the address is recorded in FOUND_ADDRP. */
2807 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2808 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2809 CORE_ADDR
*found_addrp
)
2811 target_ops
*target
= current_inferior ()->top_target ();
2813 return target
->search_memory (start_addr
, search_space_len
, pattern
,
2814 pattern_len
, found_addrp
);
2817 /* Look through the currently pushed targets. If none of them will
2818 be able to restart the currently running process, issue an error
2822 target_require_runnable (void)
2824 for (target_ops
*t
= current_inferior ()->top_target ();
2828 /* If this target knows how to create a new program, then
2829 assume we will still be able to after killing the current
2830 one. Either killing and mourning will not pop T, or else
2831 find_default_run_target will find it again. */
2832 if (t
->can_create_inferior ())
2835 /* Do not worry about targets at certain strata that can not
2836 create inferiors. Assume they will be pushed again if
2837 necessary, and continue to the process_stratum. */
2838 if (t
->stratum () > process_stratum
)
2841 error (_("The \"%s\" target does not support \"run\". "
2842 "Try \"help target\" or \"continue\"."),
2846 /* This function is only called if the target is running. In that
2847 case there should have been a process_stratum target and it
2848 should either know how to create inferiors, or not... */
2849 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2852 /* Whether GDB is allowed to fall back to the default run target for
2853 "run", "attach", etc. when no target is connected yet. */
2854 static bool auto_connect_native_target
= true;
2857 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2858 struct cmd_list_element
*c
, const char *value
)
2860 fprintf_filtered (file
,
2861 _("Whether GDB may automatically connect to the "
2862 "native target is %s.\n"),
2866 /* A pointer to the target that can respond to "run" or "attach".
2867 Native targets are always singletons and instantiated early at GDB
2869 static target_ops
*the_native_target
;
2874 set_native_target (target_ops
*target
)
2876 if (the_native_target
!= NULL
)
2877 internal_error (__FILE__
, __LINE__
,
2878 _("native target already set (\"%s\")."),
2879 the_native_target
->longname ());
2881 the_native_target
= target
;
2887 get_native_target ()
2889 return the_native_target
;
2892 /* Look through the list of possible targets for a target that can
2893 execute a run or attach command without any other data. This is
2894 used to locate the default process stratum.
2896 If DO_MESG is not NULL, the result is always valid (error() is
2897 called for errors); else, return NULL on error. */
2899 static struct target_ops
*
2900 find_default_run_target (const char *do_mesg
)
2902 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2903 return the_native_target
;
2905 if (do_mesg
!= NULL
)
2906 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2913 find_attach_target (void)
2915 /* If a target on the current stack can attach, use it. */
2916 for (target_ops
*t
= current_inferior ()->top_target ();
2920 if (t
->can_attach ())
2924 /* Otherwise, use the default run target for attaching. */
2925 return find_default_run_target ("attach");
2931 find_run_target (void)
2933 /* If a target on the current stack can run, use it. */
2934 for (target_ops
*t
= current_inferior ()->top_target ();
2938 if (t
->can_create_inferior ())
2942 /* Otherwise, use the default run target. */
2943 return find_default_run_target ("run");
2947 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2952 /* Implement the "info proc" command. */
2955 target_info_proc (const char *args
, enum info_proc_what what
)
2957 struct target_ops
*t
;
2959 /* If we're already connected to something that can get us OS
2960 related data, use it. Otherwise, try using the native
2962 t
= find_target_at (process_stratum
);
2964 t
= find_default_run_target (NULL
);
2966 for (; t
!= NULL
; t
= t
->beneath ())
2968 if (t
->info_proc (args
, what
))
2971 fprintf_unfiltered (gdb_stdlog
,
2972 "target_info_proc (\"%s\", %d)\n", args
, what
);
2982 find_default_supports_disable_randomization (struct target_ops
*self
)
2984 struct target_ops
*t
;
2986 t
= find_default_run_target (NULL
);
2988 return t
->supports_disable_randomization ();
2993 target_supports_disable_randomization (void)
2995 return current_inferior ()->top_target ()->supports_disable_randomization ();
2998 /* See target/target.h. */
3001 target_supports_multi_process (void)
3003 return current_inferior ()->top_target ()->supports_multi_process ();
3008 gdb::optional
<gdb::char_vector
>
3009 target_get_osdata (const char *type
)
3011 struct target_ops
*t
;
3013 /* If we're already connected to something that can get us OS
3014 related data, use it. Otherwise, try using the native
3016 t
= find_target_at (process_stratum
);
3018 t
= find_default_run_target ("get OS data");
3023 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
3026 /* Determine the current address space of thread PTID. */
3028 struct address_space
*
3029 target_thread_address_space (ptid_t ptid
)
3031 struct address_space
*aspace
;
3033 aspace
= current_inferior ()->top_target ()->thread_address_space (ptid
);
3034 gdb_assert (aspace
!= NULL
);
3042 target_ops::beneath () const
3044 return current_inferior ()->find_target_beneath (this);
3048 target_ops::close ()
3053 target_ops::can_attach ()
3059 target_ops::attach (const char *, int)
3061 gdb_assert_not_reached ("target_ops::attach called");
3065 target_ops::can_create_inferior ()
3071 target_ops::create_inferior (const char *, const std::string
&,
3074 gdb_assert_not_reached ("target_ops::create_inferior called");
3078 target_ops::can_run ()
3086 for (target_ops
*t
= current_inferior ()->top_target ();
3097 /* Target file operations. */
3099 static struct target_ops
*
3100 default_fileio_target (void)
3102 struct target_ops
*t
;
3104 /* If we're already connected to something that can perform
3105 file I/O, use it. Otherwise, try using the native target. */
3106 t
= find_target_at (process_stratum
);
3109 return find_default_run_target ("file I/O");
3112 /* File handle for target file operations. */
3116 /* The target on which this file is open. NULL if the target is
3117 meanwhile closed while the handle is open. */
3120 /* The file descriptor on the target. */
3123 /* Check whether this fileio_fh_t represents a closed file. */
3126 return target_fd
< 0;
3130 /* Vector of currently open file handles. The value returned by
3131 target_fileio_open and passed as the FD argument to other
3132 target_fileio_* functions is an index into this vector. This
3133 vector's entries are never freed; instead, files are marked as
3134 closed, and the handle becomes available for reuse. */
3135 static std::vector
<fileio_fh_t
> fileio_fhandles
;
3137 /* Index into fileio_fhandles of the lowest handle that might be
3138 closed. This permits handle reuse without searching the whole
3139 list each time a new file is opened. */
3140 static int lowest_closed_fd
;
3145 fileio_handles_invalidate_target (target_ops
*targ
)
3147 for (fileio_fh_t
&fh
: fileio_fhandles
)
3148 if (fh
.target
== targ
)
3152 /* Acquire a target fileio file descriptor. */
3155 acquire_fileio_fd (target_ops
*target
, int target_fd
)
3157 /* Search for closed handles to reuse. */
3158 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
3160 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
3162 if (fh
.is_closed ())
3166 /* Push a new handle if no closed handles were found. */
3167 if (lowest_closed_fd
== fileio_fhandles
.size ())
3168 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
3170 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
3172 /* Should no longer be marked closed. */
3173 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
3175 /* Return its index, and start the next lookup at
3177 return lowest_closed_fd
++;
3180 /* Release a target fileio file descriptor. */
3183 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
3186 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
3189 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
3191 static fileio_fh_t
*
3192 fileio_fd_to_fh (int fd
)
3194 return &fileio_fhandles
[fd
];
3198 /* Default implementations of file i/o methods. We don't want these
3199 to delegate automatically, because we need to know which target
3200 supported the method, in order to call it directly from within
3201 pread/pwrite, etc. */
3204 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
3205 int flags
, int mode
, int warn_if_slow
,
3208 *target_errno
= FILEIO_ENOSYS
;
3213 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3214 ULONGEST offset
, int *target_errno
)
3216 *target_errno
= FILEIO_ENOSYS
;
3221 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3222 ULONGEST offset
, int *target_errno
)
3224 *target_errno
= FILEIO_ENOSYS
;
3229 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3231 *target_errno
= FILEIO_ENOSYS
;
3236 target_ops::fileio_close (int fd
, int *target_errno
)
3238 *target_errno
= FILEIO_ENOSYS
;
3243 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
3246 *target_errno
= FILEIO_ENOSYS
;
3250 gdb::optional
<std::string
>
3251 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
3254 *target_errno
= FILEIO_ENOSYS
;
3261 target_fileio_open (struct inferior
*inf
, const char *filename
,
3262 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
3264 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3266 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
3267 warn_if_slow
, target_errno
);
3269 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
3275 fd
= acquire_fileio_fd (t
, fd
);
3278 fprintf_unfiltered (gdb_stdlog
,
3279 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
3281 inf
== NULL
? 0 : inf
->num
,
3282 filename
, flags
, mode
,
3284 fd
!= -1 ? 0 : *target_errno
);
3288 *target_errno
= FILEIO_ENOSYS
;
3295 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
3296 ULONGEST offset
, int *target_errno
)
3298 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3301 if (fh
->is_closed ())
3302 *target_errno
= EBADF
;
3303 else if (fh
->target
== NULL
)
3304 *target_errno
= EIO
;
3306 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
3307 len
, offset
, target_errno
);
3310 fprintf_unfiltered (gdb_stdlog
,
3311 "target_fileio_pwrite (%d,...,%d,%s) "
3313 fd
, len
, pulongest (offset
),
3314 ret
, ret
!= -1 ? 0 : *target_errno
);
3321 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
3322 ULONGEST offset
, int *target_errno
)
3324 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3327 if (fh
->is_closed ())
3328 *target_errno
= EBADF
;
3329 else if (fh
->target
== NULL
)
3330 *target_errno
= EIO
;
3332 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
3333 len
, offset
, target_errno
);
3336 fprintf_unfiltered (gdb_stdlog
,
3337 "target_fileio_pread (%d,...,%d,%s) "
3339 fd
, len
, pulongest (offset
),
3340 ret
, ret
!= -1 ? 0 : *target_errno
);
3347 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
3349 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3352 if (fh
->is_closed ())
3353 *target_errno
= EBADF
;
3354 else if (fh
->target
== NULL
)
3355 *target_errno
= EIO
;
3357 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
3360 fprintf_unfiltered (gdb_stdlog
,
3361 "target_fileio_fstat (%d) = %d (%d)\n",
3362 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3369 target_fileio_close (int fd
, int *target_errno
)
3371 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
3374 if (fh
->is_closed ())
3375 *target_errno
= EBADF
;
3378 if (fh
->target
!= NULL
)
3379 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3383 release_fileio_fd (fd
, fh
);
3387 fprintf_unfiltered (gdb_stdlog
,
3388 "target_fileio_close (%d) = %d (%d)\n",
3389 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3396 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3399 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3401 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3403 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3407 fprintf_unfiltered (gdb_stdlog
,
3408 "target_fileio_unlink (%d,%s)"
3410 inf
== NULL
? 0 : inf
->num
, filename
,
3411 ret
, ret
!= -1 ? 0 : *target_errno
);
3415 *target_errno
= FILEIO_ENOSYS
;
3421 gdb::optional
<std::string
>
3422 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3425 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3427 gdb::optional
<std::string
> ret
3428 = t
->fileio_readlink (inf
, filename
, target_errno
);
3430 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3434 fprintf_unfiltered (gdb_stdlog
,
3435 "target_fileio_readlink (%d,%s)"
3437 inf
== NULL
? 0 : inf
->num
,
3438 filename
, ret
? ret
->c_str () : "(nil)",
3439 ret
? 0 : *target_errno
);
3443 *target_errno
= FILEIO_ENOSYS
;
3447 /* Like scoped_fd, but specific to target fileio. */
3449 class scoped_target_fd
3452 explicit scoped_target_fd (int fd
) noexcept
3457 ~scoped_target_fd ()
3463 target_fileio_close (m_fd
, &target_errno
);
3467 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3469 int get () const noexcept
3478 /* Read target file FILENAME, in the filesystem as seen by INF. If
3479 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3480 remote targets, the remote stub). Store the result in *BUF_P and
3481 return the size of the transferred data. PADDING additional bytes
3482 are available in *BUF_P. This is a helper function for
3483 target_fileio_read_alloc; see the declaration of that function for
3484 more information. */
3487 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3488 gdb_byte
**buf_p
, int padding
)
3490 size_t buf_alloc
, buf_pos
;
3495 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3496 0700, false, &target_errno
));
3497 if (fd
.get () == -1)
3500 /* Start by reading up to 4K at a time. The target will throttle
3501 this number down if necessary. */
3503 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3507 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3508 buf_alloc
- buf_pos
- padding
, buf_pos
,
3512 /* An error occurred. */
3518 /* Read all there was. */
3528 /* If the buffer is filling up, expand it. */
3529 if (buf_alloc
< buf_pos
* 2)
3532 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3542 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3545 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3550 gdb::unique_xmalloc_ptr
<char>
3551 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3555 LONGEST i
, transferred
;
3557 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3558 bufstr
= (char *) buffer
;
3560 if (transferred
< 0)
3561 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3563 if (transferred
== 0)
3564 return make_unique_xstrdup ("");
3566 bufstr
[transferred
] = 0;
3568 /* Check for embedded NUL bytes; but allow trailing NULs. */
3569 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3572 warning (_("target file %s "
3573 "contained unexpected null characters"),
3578 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3583 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3584 CORE_ADDR addr
, int len
)
3586 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3590 default_watchpoint_addr_within_range (struct target_ops
*target
,
3592 CORE_ADDR start
, int length
)
3594 return addr
>= start
&& addr
< start
+ length
;
3600 target_stack::find_beneath (const target_ops
*t
) const
3602 /* Look for a non-empty slot at stratum levels beneath T's. */
3603 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3604 if (m_stack
[stratum
] != NULL
)
3605 return m_stack
[stratum
];
3613 find_target_at (enum strata stratum
)
3615 return current_inferior ()->target_at (stratum
);
3623 target_announce_detach (int from_tty
)
3626 const char *exec_file
;
3631 pid
= inferior_ptid
.pid ();
3632 exec_file
= get_exec_file (0);
3633 if (exec_file
== nullptr)
3634 printf_unfiltered ("Detaching from pid %s\n",
3635 target_pid_to_str (ptid_t (pid
)).c_str ());
3637 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3638 target_pid_to_str (ptid_t (pid
)).c_str ());
3644 target_announce_attach (int from_tty
, int pid
)
3649 const char *exec_file
= get_exec_file (0);
3651 if (exec_file
!= nullptr)
3652 printf_unfiltered ("Attaching to program: %s, %s\n", exec_file
,
3653 target_pid_to_str (ptid_t (pid
)).c_str ());
3655 printf_unfiltered ("Attaching to %s\n",
3656 target_pid_to_str (ptid_t (pid
)).c_str ());
3659 /* The inferior process has died. Long live the inferior! */
3662 generic_mourn_inferior (void)
3664 inferior
*inf
= current_inferior ();
3666 switch_to_no_thread ();
3668 /* Mark breakpoints uninserted in case something tries to delete a
3669 breakpoint while we delete the inferior's threads (which would
3670 fail, since the inferior is long gone). */
3671 mark_breakpoints_out ();
3674 exit_inferior (inf
);
3676 /* Note this wipes step-resume breakpoints, so needs to be done
3677 after exit_inferior, which ends up referencing the step-resume
3678 breakpoints through clear_thread_inferior_resources. */
3679 breakpoint_init_inferior (inf_exited
);
3681 registers_changed ();
3683 reopen_exec_file ();
3684 reinit_frame_cache ();
3686 if (deprecated_detach_hook
)
3687 deprecated_detach_hook ();
3690 /* Convert a normal process ID to a string. Returns the string in a
3694 normal_pid_to_str (ptid_t ptid
)
3696 return string_printf ("process %d", ptid
.pid ());
3700 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3702 return normal_pid_to_str (ptid
);
3705 /* Error-catcher for target_find_memory_regions. */
3707 dummy_find_memory_regions (struct target_ops
*self
,
3708 find_memory_region_ftype ignore1
, void *ignore2
)
3710 error (_("Command not implemented for this target."));
3714 /* Error-catcher for target_make_corefile_notes. */
3715 static gdb::unique_xmalloc_ptr
<char>
3716 dummy_make_corefile_notes (struct target_ops
*self
,
3717 bfd
*ignore1
, int *ignore2
)
3719 error (_("Command not implemented for this target."));
3723 #include "target-delegates.c"
3725 /* The initial current target, so that there is always a semi-valid
3728 static dummy_target the_dummy_target
;
3735 return &the_dummy_target
;
3738 static const target_info dummy_target_info
= {
3745 dummy_target::stratum () const
3747 return dummy_stratum
;
3751 debug_target::stratum () const
3753 return debug_stratum
;
3757 dummy_target::info () const
3759 return dummy_target_info
;
3763 debug_target::info () const
3765 return beneath ()->info ();
3771 target_close (struct target_ops
*targ
)
3773 for (inferior
*inf
: all_inferiors ())
3774 gdb_assert (!inf
->target_is_pushed (targ
));
3776 fileio_handles_invalidate_target (targ
);
3781 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3785 target_thread_alive (ptid_t ptid
)
3787 return current_inferior ()->top_target ()->thread_alive (ptid
);
3791 target_update_thread_list (void)
3793 current_inferior ()->top_target ()->update_thread_list ();
3797 target_stop (ptid_t ptid
)
3799 process_stratum_target
*proc_target
= current_inferior ()->process_target ();
3801 gdb_assert (!proc_target
->commit_resumed_state
);
3805 warning (_("May not interrupt or stop the target, ignoring attempt"));
3809 current_inferior ()->top_target ()->stop (ptid
);
3817 warning (_("May not interrupt or stop the target, ignoring attempt"));
3821 current_inferior ()->top_target ()->interrupt ();
3827 target_pass_ctrlc (void)
3829 /* Pass the Ctrl-C to the first target that has a thread
3831 for (inferior
*inf
: all_inferiors ())
3833 target_ops
*proc_target
= inf
->process_target ();
3834 if (proc_target
== NULL
)
3837 for (thread_info
*thr
: inf
->non_exited_threads ())
3839 /* A thread can be THREAD_STOPPED and executing, while
3840 running an infcall. */
3841 if (thr
->state
== THREAD_RUNNING
|| thr
->executing ())
3843 /* We can get here quite deep in target layers. Avoid
3844 switching thread context or anything that would
3845 communicate with the target (e.g., to fetch
3846 registers), or flushing e.g., the frame cache. We
3847 just switch inferior in order to be able to call
3848 through the target_stack. */
3849 scoped_restore_current_inferior restore_inferior
;
3850 set_current_inferior (inf
);
3851 current_inferior ()->top_target ()->pass_ctrlc ();
3861 default_target_pass_ctrlc (struct target_ops
*ops
)
3863 target_interrupt ();
3866 /* See target/target.h. */
3869 target_stop_and_wait (ptid_t ptid
)
3871 struct target_waitstatus status
;
3872 bool was_non_stop
= non_stop
;
3877 target_wait (ptid
, &status
, 0);
3879 non_stop
= was_non_stop
;
3882 /* See target/target.h. */
3885 target_continue_no_signal (ptid_t ptid
)
3887 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3890 /* See target/target.h. */
3893 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3895 target_resume (ptid
, 0, signal
);
3898 /* Concatenate ELEM to LIST, a comma-separated list. */
3901 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3903 if (!list
->empty ())
3904 list
->append (", ");
3906 list
->append (elem
);
3909 /* Helper for target_options_to_string. If OPT is present in
3910 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3911 OPT is removed from TARGET_OPTIONS. */
3914 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3915 target_wait_flag opt
, const char *opt_str
)
3917 if ((*target_options
& opt
) != 0)
3919 str_comma_list_concat_elem (ret
, opt_str
);
3920 *target_options
&= ~opt
;
3927 target_options_to_string (target_wait_flags target_options
)
3931 #define DO_TARG_OPTION(OPT) \
3932 do_option (&target_options, &ret, OPT, #OPT)
3934 DO_TARG_OPTION (TARGET_WNOHANG
);
3936 if (target_options
!= 0)
3937 str_comma_list_concat_elem (&ret
, "unknown???");
3943 target_fetch_registers (struct regcache
*regcache
, int regno
)
3945 current_inferior ()->top_target ()->fetch_registers (regcache
, regno
);
3947 regcache
->debug_print_register ("target_fetch_registers", regno
);
3951 target_store_registers (struct regcache
*regcache
, int regno
)
3953 if (!may_write_registers
)
3954 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3956 current_inferior ()->top_target ()->store_registers (regcache
, regno
);
3959 regcache
->debug_print_register ("target_store_registers", regno
);
3964 target_core_of_thread (ptid_t ptid
)
3966 return current_inferior ()->top_target ()->core_of_thread (ptid
);
3970 simple_verify_memory (struct target_ops
*ops
,
3971 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3973 LONGEST total_xfered
= 0;
3975 while (total_xfered
< size
)
3977 ULONGEST xfered_len
;
3978 enum target_xfer_status status
;
3980 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3982 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3983 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3985 if (status
== TARGET_XFER_OK
3986 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3988 total_xfered
+= xfered_len
;
3997 /* Default implementation of memory verification. */
4000 default_verify_memory (struct target_ops
*self
,
4001 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4003 /* Start over from the top of the target stack. */
4004 return simple_verify_memory (current_inferior ()->top_target (),
4005 data
, memaddr
, size
);
4009 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
4011 target_ops
*target
= current_inferior ()->top_target ();
4013 return target
->verify_memory (data
, memaddr
, size
);
4016 /* The documentation for this function is in its prototype declaration in
4020 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4021 enum target_hw_bp_type rw
)
4023 target_ops
*target
= current_inferior ()->top_target ();
4025 return target
->insert_mask_watchpoint (addr
, mask
, rw
);
4028 /* The documentation for this function is in its prototype declaration in
4032 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
4033 enum target_hw_bp_type rw
)
4035 target_ops
*target
= current_inferior ()->top_target ();
4037 return target
->remove_mask_watchpoint (addr
, mask
, rw
);
4040 /* The documentation for this function is in its prototype declaration
4044 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
4046 target_ops
*target
= current_inferior ()->top_target ();
4048 return target
->masked_watch_num_registers (addr
, mask
);
4051 /* The documentation for this function is in its prototype declaration
4055 target_ranged_break_num_registers (void)
4057 return current_inferior ()->top_target ()->ranged_break_num_registers ();
4062 struct btrace_target_info
*
4063 target_enable_btrace (thread_info
*tp
, const struct btrace_config
*conf
)
4065 return current_inferior ()->top_target ()->enable_btrace (tp
, conf
);
4071 target_disable_btrace (struct btrace_target_info
*btinfo
)
4073 current_inferior ()->top_target ()->disable_btrace (btinfo
);
4079 target_teardown_btrace (struct btrace_target_info
*btinfo
)
4081 current_inferior ()->top_target ()->teardown_btrace (btinfo
);
4087 target_read_btrace (struct btrace_data
*btrace
,
4088 struct btrace_target_info
*btinfo
,
4089 enum btrace_read_type type
)
4091 target_ops
*target
= current_inferior ()->top_target ();
4093 return target
->read_btrace (btrace
, btinfo
, type
);
4098 const struct btrace_config
*
4099 target_btrace_conf (const struct btrace_target_info
*btinfo
)
4101 return current_inferior ()->top_target ()->btrace_conf (btinfo
);
4107 target_stop_recording (void)
4109 current_inferior ()->top_target ()->stop_recording ();
4115 target_save_record (const char *filename
)
4117 current_inferior ()->top_target ()->save_record (filename
);
4123 target_supports_delete_record ()
4125 return current_inferior ()->top_target ()->supports_delete_record ();
4131 target_delete_record (void)
4133 current_inferior ()->top_target ()->delete_record ();
4139 target_record_method (ptid_t ptid
)
4141 return current_inferior ()->top_target ()->record_method (ptid
);
4147 target_record_is_replaying (ptid_t ptid
)
4149 return current_inferior ()->top_target ()->record_is_replaying (ptid
);
4155 target_record_will_replay (ptid_t ptid
, int dir
)
4157 return current_inferior ()->top_target ()->record_will_replay (ptid
, dir
);
4163 target_record_stop_replaying (void)
4165 current_inferior ()->top_target ()->record_stop_replaying ();
4171 target_goto_record_begin (void)
4173 current_inferior ()->top_target ()->goto_record_begin ();
4179 target_goto_record_end (void)
4181 current_inferior ()->top_target ()->goto_record_end ();
4187 target_goto_record (ULONGEST insn
)
4189 current_inferior ()->top_target ()->goto_record (insn
);
4195 target_insn_history (int size
, gdb_disassembly_flags flags
)
4197 current_inferior ()->top_target ()->insn_history (size
, flags
);
4203 target_insn_history_from (ULONGEST from
, int size
,
4204 gdb_disassembly_flags flags
)
4206 current_inferior ()->top_target ()->insn_history_from (from
, size
, flags
);
4212 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
4213 gdb_disassembly_flags flags
)
4215 current_inferior ()->top_target ()->insn_history_range (begin
, end
, flags
);
4221 target_call_history (int size
, record_print_flags flags
)
4223 current_inferior ()->top_target ()->call_history (size
, flags
);
4229 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
4231 current_inferior ()->top_target ()->call_history_from (begin
, size
, flags
);
4237 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
4239 current_inferior ()->top_target ()->call_history_range (begin
, end
, flags
);
4244 const struct frame_unwind
*
4245 target_get_unwinder (void)
4247 return current_inferior ()->top_target ()->get_unwinder ();
4252 const struct frame_unwind
*
4253 target_get_tailcall_unwinder (void)
4255 return current_inferior ()->top_target ()->get_tailcall_unwinder ();
4261 target_prepare_to_generate_core (void)
4263 current_inferior ()->top_target ()->prepare_to_generate_core ();
4269 target_done_generating_core (void)
4271 current_inferior ()->top_target ()->done_generating_core ();
4276 static char targ_desc
[] =
4277 "Names of targets and files being debugged.\nShows the entire \
4278 stack of targets currently in use (including the exec-file,\n\
4279 core-file, and process, if any), as well as the symbol file name.";
4282 default_rcmd (struct target_ops
*self
, const char *command
,
4283 struct ui_file
*output
)
4285 error (_("\"monitor\" command not supported by this target."));
4289 do_monitor_command (const char *cmd
, int from_tty
)
4291 target_rcmd (cmd
, gdb_stdtarg
);
4294 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
4298 flash_erase_command (const char *cmd
, int from_tty
)
4300 /* Used to communicate termination of flash operations to the target. */
4301 bool found_flash_region
= false;
4302 struct gdbarch
*gdbarch
= target_gdbarch ();
4304 std::vector
<mem_region
> mem_regions
= target_memory_map ();
4306 /* Iterate over all memory regions. */
4307 for (const mem_region
&m
: mem_regions
)
4309 /* Is this a flash memory region? */
4310 if (m
.attrib
.mode
== MEM_FLASH
)
4312 found_flash_region
= true;
4313 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
4315 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
4317 current_uiout
->message (_("Erasing flash memory region at address "));
4318 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
4319 current_uiout
->message (", size = ");
4320 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
4321 current_uiout
->message ("\n");
4325 /* Did we do any flash operations? If so, we need to finalize them. */
4326 if (found_flash_region
)
4327 target_flash_done ();
4329 current_uiout
->message (_("No flash memory regions found.\n"));
4332 /* Print the name of each layers of our target stack. */
4335 maintenance_print_target_stack (const char *cmd
, int from_tty
)
4337 printf_filtered (_("The current target stack is:\n"));
4339 for (target_ops
*t
= current_inferior ()->top_target ();
4343 if (t
->stratum () == debug_stratum
)
4345 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
4352 target_async (int enable
)
4354 /* If we are trying to enable async mode then it must be the case that
4355 async mode is possible for this target. */
4356 gdb_assert (!enable
|| target_can_async_p ());
4357 infrun_async (enable
);
4358 current_inferior ()->top_target ()->async (enable
);
4364 target_thread_events (int enable
)
4366 current_inferior ()->top_target ()->thread_events (enable
);
4369 /* Controls if targets can report that they can/are async. This is
4370 just for maintainers to use when debugging gdb. */
4371 bool target_async_permitted
= true;
4374 set_maint_target_async (bool permitted
)
4376 if (have_live_inferiors ())
4377 error (_("Cannot change this setting while the inferior is running."));
4379 target_async_permitted
= permitted
;
4383 get_maint_target_async ()
4385 return target_async_permitted
;
4389 show_maint_target_async (ui_file
*file
, int from_tty
,
4390 cmd_list_element
*c
, const char *value
)
4392 fprintf_filtered (file
,
4393 _("Controlling the inferior in "
4394 "asynchronous mode is %s.\n"), value
);
4397 /* Return true if the target operates in non-stop mode even with "set
4401 target_always_non_stop_p (void)
4403 return current_inferior ()->top_target ()->always_non_stop_p ();
4409 target_is_non_stop_p ()
4412 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
4413 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
4414 && target_always_non_stop_p ()))
4415 && target_can_async_p ());
4421 exists_non_stop_target ()
4423 if (target_is_non_stop_p ())
4426 scoped_restore_current_thread restore_thread
;
4428 for (inferior
*inf
: all_inferiors ())
4430 switch_to_inferior_no_thread (inf
);
4431 if (target_is_non_stop_p ())
4438 /* Controls if targets can report that they always run in non-stop
4439 mode. This is just for maintainers to use when debugging gdb. */
4440 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
4442 /* Set callback for maint target-non-stop setting. */
4445 set_maint_target_non_stop (auto_boolean enabled
)
4447 if (have_live_inferiors ())
4448 error (_("Cannot change this setting while the inferior is running."));
4450 target_non_stop_enabled
= enabled
;
4453 /* Get callback for maint target-non-stop setting. */
4456 get_maint_target_non_stop ()
4458 return target_non_stop_enabled
;
4462 show_maint_target_non_stop (ui_file
*file
, int from_tty
,
4463 cmd_list_element
*c
, const char *value
)
4465 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4466 fprintf_filtered (file
,
4467 _("Whether the target is always in non-stop mode "
4468 "is %s (currently %s).\n"), value
,
4469 target_always_non_stop_p () ? "on" : "off");
4471 fprintf_filtered (file
,
4472 _("Whether the target is always in non-stop mode "
4473 "is %s.\n"), value
);
4476 /* Temporary copies of permission settings. */
4478 static bool may_write_registers_1
= true;
4479 static bool may_write_memory_1
= true;
4480 static bool may_insert_breakpoints_1
= true;
4481 static bool may_insert_tracepoints_1
= true;
4482 static bool may_insert_fast_tracepoints_1
= true;
4483 static bool may_stop_1
= true;
4485 /* Make the user-set values match the real values again. */
4488 update_target_permissions (void)
4490 may_write_registers_1
= may_write_registers
;
4491 may_write_memory_1
= may_write_memory
;
4492 may_insert_breakpoints_1
= may_insert_breakpoints
;
4493 may_insert_tracepoints_1
= may_insert_tracepoints
;
4494 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4495 may_stop_1
= may_stop
;
4498 /* The one function handles (most of) the permission flags in the same
4502 set_target_permissions (const char *args
, int from_tty
,
4503 struct cmd_list_element
*c
)
4505 if (target_has_execution ())
4507 update_target_permissions ();
4508 error (_("Cannot change this setting while the inferior is running."));
4511 /* Make the real values match the user-changed values. */
4512 may_write_registers
= may_write_registers_1
;
4513 may_insert_breakpoints
= may_insert_breakpoints_1
;
4514 may_insert_tracepoints
= may_insert_tracepoints_1
;
4515 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4516 may_stop
= may_stop_1
;
4517 update_observer_mode ();
4520 /* Set memory write permission independently of observer mode. */
4523 set_write_memory_permission (const char *args
, int from_tty
,
4524 struct cmd_list_element
*c
)
4526 /* Make the real values match the user-changed values. */
4527 may_write_memory
= may_write_memory_1
;
4528 update_observer_mode ();
4531 void _initialize_target ();
4534 _initialize_target ()
4536 the_debug_target
= new debug_target ();
4538 add_info ("target", info_target_command
, targ_desc
);
4539 add_info ("files", info_target_command
, targ_desc
);
4541 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4542 Set target debugging."), _("\
4543 Show target debugging."), _("\
4544 When non-zero, target debugging is enabled. Higher numbers are more\n\
4548 &setdebuglist
, &showdebuglist
);
4550 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4551 &trust_readonly
, _("\
4552 Set mode for reading from readonly sections."), _("\
4553 Show mode for reading from readonly sections."), _("\
4554 When this mode is on, memory reads from readonly sections (such as .text)\n\
4555 will be read from the object file instead of from the target. This will\n\
4556 result in significant performance improvement for remote targets."),
4558 show_trust_readonly
,
4559 &setlist
, &showlist
);
4561 add_com ("monitor", class_obscure
, do_monitor_command
,
4562 _("Send a command to the remote monitor (remote targets only)."));
4564 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4565 _("Print the name of each layer of the internal target stack."),
4566 &maintenanceprintlist
);
4568 add_setshow_boolean_cmd ("target-async", no_class
,
4570 Set whether gdb controls the inferior in asynchronous mode."), _("\
4571 Show whether gdb controls the inferior in asynchronous mode."), _("\
4572 Tells gdb whether to control the inferior in asynchronous mode."),
4573 set_maint_target_async
,
4574 get_maint_target_async
,
4575 show_maint_target_async
,
4576 &maintenance_set_cmdlist
,
4577 &maintenance_show_cmdlist
);
4579 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4581 Set whether gdb always controls the inferior in non-stop mode."), _("\
4582 Show whether gdb always controls the inferior in non-stop mode."), _("\
4583 Tells gdb whether to control the inferior in non-stop mode."),
4584 set_maint_target_non_stop
,
4585 get_maint_target_non_stop
,
4586 show_maint_target_non_stop
,
4587 &maintenance_set_cmdlist
,
4588 &maintenance_show_cmdlist
);
4590 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4591 &may_write_registers_1
, _("\
4592 Set permission to write into registers."), _("\
4593 Show permission to write into registers."), _("\
4594 When this permission is on, GDB may write into the target's registers.\n\
4595 Otherwise, any sort of write attempt will result in an error."),
4596 set_target_permissions
, NULL
,
4597 &setlist
, &showlist
);
4599 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4600 &may_write_memory_1
, _("\
4601 Set permission to write into target memory."), _("\
4602 Show permission to write into target memory."), _("\
4603 When this permission is on, GDB may write into the target's memory.\n\
4604 Otherwise, any sort of write attempt will result in an error."),
4605 set_write_memory_permission
, NULL
,
4606 &setlist
, &showlist
);
4608 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4609 &may_insert_breakpoints_1
, _("\
4610 Set permission to insert breakpoints in the target."), _("\
4611 Show permission to insert breakpoints in the target."), _("\
4612 When this permission is on, GDB may insert breakpoints in the program.\n\
4613 Otherwise, any sort of insertion attempt will result in an error."),
4614 set_target_permissions
, NULL
,
4615 &setlist
, &showlist
);
4617 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4618 &may_insert_tracepoints_1
, _("\
4619 Set permission to insert tracepoints in the target."), _("\
4620 Show permission to insert tracepoints in the target."), _("\
4621 When this permission is on, GDB may insert tracepoints in the program.\n\
4622 Otherwise, any sort of insertion attempt will result in an error."),
4623 set_target_permissions
, NULL
,
4624 &setlist
, &showlist
);
4626 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4627 &may_insert_fast_tracepoints_1
, _("\
4628 Set permission to insert fast tracepoints in the target."), _("\
4629 Show permission to insert fast tracepoints in the target."), _("\
4630 When this permission is on, GDB may insert fast tracepoints.\n\
4631 Otherwise, any sort of insertion attempt will result in an error."),
4632 set_target_permissions
, NULL
,
4633 &setlist
, &showlist
);
4635 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4637 Set permission to interrupt or signal the target."), _("\
4638 Show permission to interrupt or signal the target."), _("\
4639 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4640 Otherwise, any attempt to interrupt or stop will be ignored."),
4641 set_target_permissions
, NULL
,
4642 &setlist
, &showlist
);
4644 add_com ("flash-erase", no_class
, flash_erase_command
,
4645 _("Erase all flash memory regions."));
4647 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4648 &auto_connect_native_target
, _("\
4649 Set whether GDB may automatically connect to the native target."), _("\
4650 Show whether GDB may automatically connect to the native target."), _("\
4651 When on, and GDB is not connected to a target yet, GDB\n\
4652 attempts \"run\" and other commands with the native target."),
4653 NULL
, show_auto_connect_native_target
,
4654 &setlist
, &showlist
);