1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2020 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"
56 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
58 static void default_terminal_info (struct target_ops
*, const char *, int);
60 static int default_watchpoint_addr_within_range (struct target_ops
*,
61 CORE_ADDR
, CORE_ADDR
, int);
63 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
66 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
68 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
71 static void default_mourn_inferior (struct target_ops
*self
);
73 static int default_search_memory (struct target_ops
*ops
,
75 ULONGEST search_space_len
,
76 const gdb_byte
*pattern
,
78 CORE_ADDR
*found_addrp
);
80 static int default_verify_memory (struct target_ops
*self
,
82 CORE_ADDR memaddr
, ULONGEST size
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static struct target_ops
*find_default_run_target (const char *);
88 static int dummy_find_memory_regions (struct target_ops
*self
,
89 find_memory_region_ftype ignore1
,
92 static char *dummy_make_corefile_notes (struct target_ops
*self
,
93 bfd
*ignore1
, int *ignore2
);
95 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
97 static enum exec_direction_kind default_execution_direction
98 (struct target_ops
*self
);
100 /* Mapping between target_info objects (which have address identity)
101 and corresponding open/factory function/callback. Each add_target
102 call adds one entry to this map, and registers a "target
103 TARGET_NAME" command that when invoked calls the factory registered
104 here. The target_info object is associated with the command via
105 the command's context. */
106 static std::unordered_map
<const target_info
*, target_open_ftype
*>
109 /* The singleton debug target. */
111 static struct target_ops
*the_debug_target
;
113 /* Top of target stack. */
114 /* The target structure we are currently using to talk to a process
115 or file or whatever "inferior" we have. */
118 current_top_target ()
120 return current_inferior ()->top_target ();
123 /* Command list for target. */
125 static struct cmd_list_element
*targetlist
= NULL
;
127 /* True if we should trust readonly sections from the
128 executable when reading memory. */
130 static bool trust_readonly
= false;
132 /* Nonzero if we should show true memory content including
133 memory breakpoint inserted by gdb. */
135 static int show_memory_breakpoints
= 0;
137 /* These globals control whether GDB attempts to perform these
138 operations; they are useful for targets that need to prevent
139 inadvertent disruption, such as in non-stop mode. */
141 bool may_write_registers
= true;
143 bool may_write_memory
= true;
145 bool may_insert_breakpoints
= true;
147 bool may_insert_tracepoints
= true;
149 bool may_insert_fast_tracepoints
= true;
151 bool may_stop
= true;
153 /* Non-zero if we want to see trace of target level stuff. */
155 static unsigned int targetdebug
= 0;
158 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
161 push_target (the_debug_target
);
163 unpush_target (the_debug_target
);
167 show_targetdebug (struct ui_file
*file
, int from_tty
,
168 struct cmd_list_element
*c
, const char *value
)
170 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
176 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
177 if (t
->has_memory ())
186 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
194 target_has_registers ()
196 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
197 if (t
->has_registers ())
204 target_has_execution (inferior
*inf
)
207 inf
= current_inferior ();
209 for (target_ops
*t
= inf
->top_target ();
211 t
= inf
->find_target_beneath (t
))
212 if (t
->has_execution (inf
))
218 /* This is used to implement the various target commands. */
221 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
223 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
224 target_open_ftype
*func
= target_factories
[ti
];
227 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
230 func (args
, from_tty
);
233 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
234 ti
->shortname
, args
, from_tty
);
240 add_target (const target_info
&t
, target_open_ftype
*func
,
241 completer_ftype
*completer
)
243 struct cmd_list_element
*c
;
245 auto &func_slot
= target_factories
[&t
];
246 if (func_slot
!= nullptr)
247 internal_error (__FILE__
, __LINE__
,
248 _("target already added (\"%s\")."), t
.shortname
);
251 if (targetlist
== NULL
)
252 add_basic_prefix_cmd ("target", class_run
, _("\
253 Connect to a target machine or process.\n\
254 The first argument is the type or protocol of the target machine.\n\
255 Remaining arguments are interpreted by the target protocol. For more\n\
256 information on the arguments for a particular protocol, type\n\
257 `help target ' followed by the protocol name."),
258 &targetlist
, "target ", 0, &cmdlist
);
259 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
260 set_cmd_context (c
, (void *) &t
);
261 set_cmd_sfunc (c
, open_target
);
262 if (completer
!= NULL
)
263 set_cmd_completer (c
, completer
);
269 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
271 struct cmd_list_element
*c
;
274 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
276 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
277 set_cmd_sfunc (c
, open_target
);
278 set_cmd_context (c
, (void *) &tinfo
);
279 alt
= xstrprintf ("target %s", tinfo
.shortname
);
280 deprecate_cmd (c
, alt
);
288 current_top_target ()->kill ();
292 target_load (const char *arg
, int from_tty
)
294 target_dcache_invalidate ();
295 current_top_target ()->load (arg
, from_tty
);
300 target_terminal_state
target_terminal::m_terminal_state
301 = target_terminal_state::is_ours
;
303 /* See target/target.h. */
306 target_terminal::init (void)
308 current_top_target ()->terminal_init ();
310 m_terminal_state
= target_terminal_state::is_ours
;
313 /* See target/target.h. */
316 target_terminal::inferior (void)
318 struct ui
*ui
= current_ui
;
320 /* A background resume (``run&'') should leave GDB in control of the
322 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
325 /* Since we always run the inferior in the main console (unless "set
326 inferior-tty" is in effect), when some UI other than the main one
327 calls target_terminal::inferior, then we leave the main UI's
328 terminal settings as is. */
332 /* If GDB is resuming the inferior in the foreground, install
333 inferior's terminal modes. */
335 struct inferior
*inf
= current_inferior ();
337 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
339 current_top_target ()->terminal_inferior ();
340 inf
->terminal_state
= target_terminal_state::is_inferior
;
343 m_terminal_state
= target_terminal_state::is_inferior
;
345 /* If the user hit C-c before, pretend that it was hit right
347 if (check_quit_flag ())
348 target_pass_ctrlc ();
351 /* See target/target.h. */
354 target_terminal::restore_inferior (void)
356 struct ui
*ui
= current_ui
;
358 /* See target_terminal::inferior(). */
359 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
362 /* Restore the terminal settings of inferiors that were in the
363 foreground but are now ours_for_output due to a temporary
364 target_target::ours_for_output() call. */
367 scoped_restore_current_inferior restore_inferior
;
369 for (::inferior
*inf
: all_inferiors ())
371 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
373 set_current_inferior (inf
);
374 current_top_target ()->terminal_inferior ();
375 inf
->terminal_state
= target_terminal_state::is_inferior
;
380 m_terminal_state
= target_terminal_state::is_inferior
;
382 /* If the user hit C-c before, pretend that it was hit right
384 if (check_quit_flag ())
385 target_pass_ctrlc ();
388 /* Switch terminal state to DESIRED_STATE, either is_ours, or
389 is_ours_for_output. */
392 target_terminal_is_ours_kind (target_terminal_state desired_state
)
394 scoped_restore_current_inferior restore_inferior
;
396 /* Must do this in two passes. First, have all inferiors save the
397 current terminal settings. Then, after all inferiors have add a
398 chance to safely save the terminal settings, restore GDB's
399 terminal settings. */
401 for (inferior
*inf
: all_inferiors ())
403 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
405 set_current_inferior (inf
);
406 current_top_target ()->terminal_save_inferior ();
410 for (inferior
*inf
: all_inferiors ())
412 /* Note we don't check is_inferior here like above because we
413 need to handle 'is_ours_for_output -> is_ours' too. Careful
414 to never transition from 'is_ours' to 'is_ours_for_output',
416 if (inf
->terminal_state
!= target_terminal_state::is_ours
417 && inf
->terminal_state
!= desired_state
)
419 set_current_inferior (inf
);
420 if (desired_state
== target_terminal_state::is_ours
)
421 current_top_target ()->terminal_ours ();
422 else if (desired_state
== target_terminal_state::is_ours_for_output
)
423 current_top_target ()->terminal_ours_for_output ();
425 gdb_assert_not_reached ("unhandled desired state");
426 inf
->terminal_state
= desired_state
;
431 /* See target/target.h. */
434 target_terminal::ours ()
436 struct ui
*ui
= current_ui
;
438 /* See target_terminal::inferior. */
442 if (m_terminal_state
== target_terminal_state::is_ours
)
445 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
446 m_terminal_state
= target_terminal_state::is_ours
;
449 /* See target/target.h. */
452 target_terminal::ours_for_output ()
454 struct ui
*ui
= current_ui
;
456 /* See target_terminal::inferior. */
460 if (!target_terminal::is_inferior ())
463 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
464 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
467 /* See target/target.h. */
470 target_terminal::info (const char *arg
, int from_tty
)
472 current_top_target ()->terminal_info (arg
, from_tty
);
478 target_supports_terminal_ours (void)
480 /* The current top target is the target at the top of the target
481 stack of the current inferior. While normally there's always an
482 inferior, we must check for nullptr here because we can get here
483 very early during startup, before the initial inferior is first
485 inferior
*inf
= current_inferior ();
489 return inf
->top_target ()->supports_terminal_ours ();
495 error (_("You can't do that when your target is `%s'"),
496 current_top_target ()->shortname ());
502 error (_("You can't do that without a process to debug."));
506 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
508 printf_unfiltered (_("No saved terminal information.\n"));
511 /* A default implementation for the to_get_ada_task_ptid target method.
513 This function builds the PTID by using both LWP and TID as part of
514 the PTID lwp and tid elements. The pid used is the pid of the
518 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
520 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
523 static enum exec_direction_kind
524 default_execution_direction (struct target_ops
*self
)
526 if (!target_can_execute_reverse ())
528 else if (!target_can_async_p ())
531 gdb_assert_not_reached ("\
532 to_execution_direction must be implemented for reverse async");
538 decref_target (target_ops
*t
)
541 if (t
->refcount () == 0)
543 if (t
->stratum () == process_stratum
)
544 connection_list_remove (as_process_stratum_target (t
));
552 target_stack::push (target_ops
*t
)
556 strata stratum
= t
->stratum ();
558 if (stratum
== process_stratum
)
559 connection_list_add (as_process_stratum_target (t
));
561 /* If there's already a target at this stratum, remove it. */
563 if (m_stack
[stratum
] != NULL
)
564 unpush (m_stack
[stratum
]);
566 /* Now add the new one. */
567 m_stack
[stratum
] = t
;
576 push_target (struct target_ops
*t
)
578 current_inferior ()->push_target (t
);
584 push_target (target_ops_up
&&t
)
586 current_inferior ()->push_target (t
.get ());
593 unpush_target (struct target_ops
*t
)
595 return current_inferior ()->unpush_target (t
);
601 target_stack::unpush (target_ops
*t
)
603 gdb_assert (t
!= NULL
);
605 strata stratum
= t
->stratum ();
607 if (stratum
== dummy_stratum
)
608 internal_error (__FILE__
, __LINE__
,
609 _("Attempt to unpush the dummy target"));
611 /* Look for the specified target. Note that a target can only occur
612 once in the target stack. */
614 if (m_stack
[stratum
] != t
)
616 /* If T wasn't pushed, quit. Only open targets should be
621 /* Unchain the target. */
622 m_stack
[stratum
] = NULL
;
624 if (m_top
== stratum
)
625 m_top
= t
->beneath ()->stratum ();
627 /* Finally close the target, if there are no inferiors
628 referencing this target still. Note we do this after unchaining,
629 so any target method calls from within the target_close
630 implementation don't end up in T anymore. Do leave the target
631 open if we have are other inferiors referencing this target
638 /* Unpush TARGET and assert that it worked. */
641 unpush_target_and_assert (struct target_ops
*target
)
643 if (!unpush_target (target
))
645 fprintf_unfiltered (gdb_stderr
,
646 "pop_all_targets couldn't find target %s\n",
647 target
->shortname ());
648 internal_error (__FILE__
, __LINE__
,
649 _("failed internal consistency check"));
654 pop_all_targets_above (enum strata above_stratum
)
656 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
657 unpush_target_and_assert (current_top_target ());
663 pop_all_targets_at_and_above (enum strata stratum
)
665 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
666 unpush_target_and_assert (current_top_target ());
670 pop_all_targets (void)
672 pop_all_targets_above (dummy_stratum
);
675 /* Return true if T is now pushed in the current inferior's target
676 stack. Return false otherwise. */
679 target_is_pushed (target_ops
*t
)
681 return current_inferior ()->target_is_pushed (t
);
684 /* Default implementation of to_get_thread_local_address. */
687 generic_tls_error (void)
689 throw_error (TLS_GENERIC_ERROR
,
690 _("Cannot find thread-local variables on this target"));
693 /* Using the objfile specified in OBJFILE, find the address for the
694 current thread's thread-local storage with offset OFFSET. */
696 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
698 volatile CORE_ADDR addr
= 0;
699 struct target_ops
*target
= current_top_target ();
700 struct gdbarch
*gdbarch
= target_gdbarch ();
702 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
704 ptid_t ptid
= inferior_ptid
;
710 /* Fetch the load module address for this objfile. */
711 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
714 if (gdbarch_get_thread_local_address_p (gdbarch
))
715 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
718 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
720 /* If an error occurred, print TLS related messages here. Otherwise,
721 throw the error to some higher catcher. */
722 catch (const gdb_exception
&ex
)
724 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
728 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
729 error (_("Cannot find thread-local variables "
730 "in this thread library."));
732 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
733 if (objfile_is_library
)
734 error (_("Cannot find shared library `%s' in dynamic"
735 " linker's load module list"), objfile_name (objfile
));
737 error (_("Cannot find executable file `%s' in dynamic"
738 " linker's load module list"), objfile_name (objfile
));
740 case TLS_NOT_ALLOCATED_YET_ERROR
:
741 if (objfile_is_library
)
742 error (_("The inferior has not yet allocated storage for"
743 " thread-local variables in\n"
744 "the shared library `%s'\n"
746 objfile_name (objfile
),
747 target_pid_to_str (ptid
).c_str ());
749 error (_("The inferior has not yet allocated storage for"
750 " thread-local variables in\n"
751 "the executable `%s'\n"
753 objfile_name (objfile
),
754 target_pid_to_str (ptid
).c_str ());
756 case TLS_GENERIC_ERROR
:
757 if (objfile_is_library
)
758 error (_("Cannot find thread-local storage for %s, "
759 "shared library %s:\n%s"),
760 target_pid_to_str (ptid
).c_str (),
761 objfile_name (objfile
), ex
.what ());
763 error (_("Cannot find thread-local storage for %s, "
764 "executable file %s:\n%s"),
765 target_pid_to_str (ptid
).c_str (),
766 objfile_name (objfile
), ex
.what ());
775 error (_("Cannot find thread-local variables on this target"));
781 target_xfer_status_to_string (enum target_xfer_status status
)
783 #define CASE(X) case X: return #X
786 CASE(TARGET_XFER_E_IO
);
787 CASE(TARGET_XFER_UNAVAILABLE
);
797 gdb::unique_xmalloc_ptr
<char>
798 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
800 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
803 if (bytes_read
== nullptr)
804 bytes_read
= &ignore
;
806 /* Note that the endian-ness does not matter here. */
807 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
808 &buffer
, bytes_read
);
812 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
815 struct target_section_table
*
816 target_get_section_table (struct target_ops
*target
)
818 return target
->get_section_table ();
821 /* Find a section containing ADDR. */
823 struct target_section
*
824 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
826 struct target_section_table
*table
= target_get_section_table (target
);
831 for (target_section
&secp
: table
->sections
)
833 if (addr
>= secp
.addr
&& addr
< secp
.endaddr
)
840 /* Helper for the memory xfer routines. Checks the attributes of the
841 memory region of MEMADDR against the read or write being attempted.
842 If the access is permitted returns true, otherwise returns false.
843 REGION_P is an optional output parameter. If not-NULL, it is
844 filled with a pointer to the memory region of MEMADDR. REG_LEN
845 returns LEN trimmed to the end of the region. This is how much the
846 caller can continue requesting, if the access is permitted. A
847 single xfer request must not straddle memory region boundaries. */
850 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
851 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
852 struct mem_region
**region_p
)
854 struct mem_region
*region
;
856 region
= lookup_mem_region (memaddr
);
858 if (region_p
!= NULL
)
861 switch (region
->attrib
.mode
)
864 if (writebuf
!= NULL
)
874 /* We only support writing to flash during "load" for now. */
875 if (writebuf
!= NULL
)
876 error (_("Writing to flash memory forbidden in this context"));
883 /* region->hi == 0 means there's no upper bound. */
884 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
887 *reg_len
= region
->hi
- memaddr
;
892 /* Read memory from more than one valid target. A core file, for
893 instance, could have some of memory but delegate other bits to
894 the target below it. So, we must manually try all targets. */
896 enum target_xfer_status
897 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
898 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
899 ULONGEST
*xfered_len
)
901 enum target_xfer_status res
;
905 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
906 readbuf
, writebuf
, memaddr
, len
,
908 if (res
== TARGET_XFER_OK
)
911 /* Stop if the target reports that the memory is not available. */
912 if (res
== TARGET_XFER_UNAVAILABLE
)
915 /* Don't continue past targets which have all the memory.
916 At one time, this code was necessary to read data from
917 executables / shared libraries when data for the requested
918 addresses weren't available in the core file. But now the
919 core target handles this case itself. */
920 if (ops
->has_all_memory ())
923 ops
= ops
->beneath ();
927 /* The cache works at the raw memory level. Make sure the cache
928 gets updated with raw contents no matter what kind of memory
929 object was originally being written. Note we do write-through
930 first, so that if it fails, we don't write to the cache contents
931 that never made it to the target. */
933 && inferior_ptid
!= null_ptid
934 && target_dcache_init_p ()
935 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
937 DCACHE
*dcache
= target_dcache_get ();
939 /* Note that writing to an area of memory which wasn't present
940 in the cache doesn't cause it to be loaded in. */
941 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
947 /* Perform a partial memory transfer.
948 For docs see target.h, to_xfer_partial. */
950 static enum target_xfer_status
951 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
952 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
953 ULONGEST len
, ULONGEST
*xfered_len
)
955 enum target_xfer_status res
;
957 struct mem_region
*region
;
958 struct inferior
*inf
;
960 /* For accesses to unmapped overlay sections, read directly from
961 files. Must do this first, as MEMADDR may need adjustment. */
962 if (readbuf
!= NULL
&& overlay_debugging
)
964 struct obj_section
*section
= find_pc_overlay (memaddr
);
966 if (pc_in_unmapped_range (memaddr
, section
))
968 struct target_section_table
*table
969 = target_get_section_table (ops
);
970 const char *section_name
= section
->the_bfd_section
->name
;
972 memaddr
= overlay_mapped_address (memaddr
, section
);
974 auto match_cb
= [=] (const struct target_section
*s
)
976 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
979 return section_table_xfer_memory_partial (readbuf
, writebuf
,
980 memaddr
, len
, xfered_len
,
985 /* Try the executable files, if "trust-readonly-sections" is set. */
986 if (readbuf
!= NULL
&& trust_readonly
)
988 struct target_section
*secp
;
989 struct target_section_table
*table
;
991 secp
= target_section_by_addr (ops
, memaddr
);
993 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
995 table
= target_get_section_table (ops
);
996 return section_table_xfer_memory_partial (readbuf
, writebuf
,
997 memaddr
, len
, xfered_len
,
1002 /* Try GDB's internal data cache. */
1004 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1006 return TARGET_XFER_E_IO
;
1008 if (inferior_ptid
!= null_ptid
)
1009 inf
= current_inferior ();
1015 /* The dcache reads whole cache lines; that doesn't play well
1016 with reading from a trace buffer, because reading outside of
1017 the collected memory range fails. */
1018 && get_traceframe_number () == -1
1019 && (region
->attrib
.cache
1020 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1021 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1023 DCACHE
*dcache
= target_dcache_get_or_init ();
1025 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1026 reg_len
, xfered_len
);
1029 /* If none of those methods found the memory we wanted, fall back
1030 to a target partial transfer. Normally a single call to
1031 to_xfer_partial is enough; if it doesn't recognize an object
1032 it will call the to_xfer_partial of the next target down.
1033 But for memory this won't do. Memory is the only target
1034 object which can be read from more than one valid target.
1035 A core file, for instance, could have some of memory but
1036 delegate other bits to the target below it. So, we must
1037 manually try all targets. */
1039 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1042 /* If we still haven't got anything, return the last error. We
1047 /* Perform a partial memory transfer. For docs see target.h,
1050 static enum target_xfer_status
1051 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1052 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1053 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1055 enum target_xfer_status res
;
1057 /* Zero length requests are ok and require no work. */
1059 return TARGET_XFER_EOF
;
1061 memaddr
= address_significant (target_gdbarch (), memaddr
);
1063 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1064 breakpoint insns, thus hiding out from higher layers whether
1065 there are software breakpoints inserted in the code stream. */
1066 if (readbuf
!= NULL
)
1068 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1071 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1072 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1076 /* A large write request is likely to be partially satisfied
1077 by memory_xfer_partial_1. We will continually malloc
1078 and free a copy of the entire write request for breakpoint
1079 shadow handling even though we only end up writing a small
1080 subset of it. Cap writes to a limit specified by the target
1081 to mitigate this. */
1082 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1084 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1085 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1086 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1093 scoped_restore_tmpl
<int>
1094 make_scoped_restore_show_memory_breakpoints (int show
)
1096 return make_scoped_restore (&show_memory_breakpoints
, show
);
1099 /* For docs see target.h, to_xfer_partial. */
1101 enum target_xfer_status
1102 target_xfer_partial (struct target_ops
*ops
,
1103 enum target_object object
, const char *annex
,
1104 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1105 ULONGEST offset
, ULONGEST len
,
1106 ULONGEST
*xfered_len
)
1108 enum target_xfer_status retval
;
1110 /* Transfer is done when LEN is zero. */
1112 return TARGET_XFER_EOF
;
1114 if (writebuf
&& !may_write_memory
)
1115 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1116 core_addr_to_string_nz (offset
), plongest (len
));
1120 /* If this is a memory transfer, let the memory-specific code
1121 have a look at it instead. Memory transfers are more
1123 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1124 || object
== TARGET_OBJECT_CODE_MEMORY
)
1125 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1126 writebuf
, offset
, len
, xfered_len
);
1127 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1129 /* Skip/avoid accessing the target if the memory region
1130 attributes block the access. Check this here instead of in
1131 raw_memory_xfer_partial as otherwise we'd end up checking
1132 this twice in the case of the memory_xfer_partial path is
1133 taken; once before checking the dcache, and another in the
1134 tail call to raw_memory_xfer_partial. */
1135 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1137 return TARGET_XFER_E_IO
;
1139 /* Request the normal memory object from other layers. */
1140 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1144 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1145 writebuf
, offset
, len
, xfered_len
);
1149 const unsigned char *myaddr
= NULL
;
1151 fprintf_unfiltered (gdb_stdlog
,
1152 "%s:target_xfer_partial "
1153 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1156 (annex
? annex
: "(null)"),
1157 host_address_to_string (readbuf
),
1158 host_address_to_string (writebuf
),
1159 core_addr_to_string_nz (offset
),
1160 pulongest (len
), retval
,
1161 pulongest (*xfered_len
));
1167 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1171 fputs_unfiltered (", bytes =", gdb_stdlog
);
1172 for (i
= 0; i
< *xfered_len
; i
++)
1174 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1176 if (targetdebug
< 2 && i
> 0)
1178 fprintf_unfiltered (gdb_stdlog
, " ...");
1181 fprintf_unfiltered (gdb_stdlog
, "\n");
1184 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1188 fputc_unfiltered ('\n', gdb_stdlog
);
1191 /* Check implementations of to_xfer_partial update *XFERED_LEN
1192 properly. Do assertion after printing debug messages, so that we
1193 can find more clues on assertion failure from debugging messages. */
1194 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1195 gdb_assert (*xfered_len
> 0);
1200 /* Read LEN bytes of target memory at address MEMADDR, placing the
1201 results in GDB's memory at MYADDR. Returns either 0 for success or
1202 -1 if any error occurs.
1204 If an error occurs, no guarantee is made about the contents of the data at
1205 MYADDR. In particular, the caller should not depend upon partial reads
1206 filling the buffer with good data. There is no way for the caller to know
1207 how much good data might have been transfered anyway. Callers that can
1208 deal with partial reads should call target_read (which will retry until
1209 it makes no progress, and then return how much was transferred). */
1212 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1214 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1215 myaddr
, memaddr
, len
) == len
)
1221 /* See target/target.h. */
1224 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1229 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1232 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1233 gdbarch_byte_order (target_gdbarch ()));
1237 /* Like target_read_memory, but specify explicitly that this is a read
1238 from the target's raw memory. That is, this read bypasses the
1239 dcache, breakpoint shadowing, etc. */
1242 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1244 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1245 myaddr
, memaddr
, len
) == len
)
1251 /* Like target_read_memory, but specify explicitly that this is a read from
1252 the target's stack. This may trigger different cache behavior. */
1255 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1257 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1258 myaddr
, memaddr
, len
) == len
)
1264 /* Like target_read_memory, but specify explicitly that this is a read from
1265 the target's code. This may trigger different cache behavior. */
1268 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1270 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1271 myaddr
, memaddr
, len
) == len
)
1277 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1278 Returns either 0 for success or -1 if any error occurs. If an
1279 error occurs, no guarantee is made about how much data got written.
1280 Callers that can deal with partial writes should call
1284 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1286 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1287 myaddr
, memaddr
, len
) == len
)
1293 /* Write LEN bytes from MYADDR to target raw memory at address
1294 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1295 If an error occurs, no guarantee is made about how much data got
1296 written. Callers that can deal with partial writes should call
1300 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1302 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1303 myaddr
, memaddr
, len
) == len
)
1309 /* Fetch the target's memory map. */
1311 std::vector
<mem_region
>
1312 target_memory_map (void)
1314 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1315 if (result
.empty ())
1318 std::sort (result
.begin (), result
.end ());
1320 /* Check that regions do not overlap. Simultaneously assign
1321 a numbering for the "mem" commands to use to refer to
1323 mem_region
*last_one
= NULL
;
1324 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1326 mem_region
*this_one
= &result
[ix
];
1327 this_one
->number
= ix
;
1329 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1331 warning (_("Overlapping regions in memory map: ignoring"));
1332 return std::vector
<mem_region
> ();
1335 last_one
= this_one
;
1342 target_flash_erase (ULONGEST address
, LONGEST length
)
1344 current_top_target ()->flash_erase (address
, length
);
1348 target_flash_done (void)
1350 current_top_target ()->flash_done ();
1354 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1355 struct cmd_list_element
*c
, const char *value
)
1357 fprintf_filtered (file
,
1358 _("Mode for reading from readonly sections is %s.\n"),
1362 /* Target vector read/write partial wrapper functions. */
1364 static enum target_xfer_status
1365 target_read_partial (struct target_ops
*ops
,
1366 enum target_object object
,
1367 const char *annex
, gdb_byte
*buf
,
1368 ULONGEST offset
, ULONGEST len
,
1369 ULONGEST
*xfered_len
)
1371 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1375 static enum target_xfer_status
1376 target_write_partial (struct target_ops
*ops
,
1377 enum target_object object
,
1378 const char *annex
, const gdb_byte
*buf
,
1379 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1381 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1385 /* Wrappers to perform the full transfer. */
1387 /* For docs on target_read see target.h. */
1390 target_read (struct target_ops
*ops
,
1391 enum target_object object
,
1392 const char *annex
, gdb_byte
*buf
,
1393 ULONGEST offset
, LONGEST len
)
1395 LONGEST xfered_total
= 0;
1398 /* If we are reading from a memory object, find the length of an addressable
1399 unit for that architecture. */
1400 if (object
== TARGET_OBJECT_MEMORY
1401 || object
== TARGET_OBJECT_STACK_MEMORY
1402 || object
== TARGET_OBJECT_CODE_MEMORY
1403 || object
== TARGET_OBJECT_RAW_MEMORY
)
1404 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1406 while (xfered_total
< len
)
1408 ULONGEST xfered_partial
;
1409 enum target_xfer_status status
;
1411 status
= target_read_partial (ops
, object
, annex
,
1412 buf
+ xfered_total
* unit_size
,
1413 offset
+ xfered_total
, len
- xfered_total
,
1416 /* Call an observer, notifying them of the xfer progress? */
1417 if (status
== TARGET_XFER_EOF
)
1418 return xfered_total
;
1419 else if (status
== TARGET_XFER_OK
)
1421 xfered_total
+= xfered_partial
;
1425 return TARGET_XFER_E_IO
;
1431 /* Assuming that the entire [begin, end) range of memory cannot be
1432 read, try to read whatever subrange is possible to read.
1434 The function returns, in RESULT, either zero or one memory block.
1435 If there's a readable subrange at the beginning, it is completely
1436 read and returned. Any further readable subrange will not be read.
1437 Otherwise, if there's a readable subrange at the end, it will be
1438 completely read and returned. Any readable subranges before it
1439 (obviously, not starting at the beginning), will be ignored. In
1440 other cases -- either no readable subrange, or readable subrange(s)
1441 that is neither at the beginning, or end, nothing is returned.
1443 The purpose of this function is to handle a read across a boundary
1444 of accessible memory in a case when memory map is not available.
1445 The above restrictions are fine for this case, but will give
1446 incorrect results if the memory is 'patchy'. However, supporting
1447 'patchy' memory would require trying to read every single byte,
1448 and it seems unacceptable solution. Explicit memory map is
1449 recommended for this case -- and target_read_memory_robust will
1450 take care of reading multiple ranges then. */
1453 read_whatever_is_readable (struct target_ops
*ops
,
1454 const ULONGEST begin
, const ULONGEST end
,
1456 std::vector
<memory_read_result
> *result
)
1458 ULONGEST current_begin
= begin
;
1459 ULONGEST current_end
= end
;
1461 ULONGEST xfered_len
;
1463 /* If we previously failed to read 1 byte, nothing can be done here. */
1464 if (end
- begin
<= 1)
1467 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1469 /* Check that either first or the last byte is readable, and give up
1470 if not. This heuristic is meant to permit reading accessible memory
1471 at the boundary of accessible region. */
1472 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1473 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1478 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1479 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1480 &xfered_len
) == TARGET_XFER_OK
)
1488 /* Loop invariant is that the [current_begin, current_end) was previously
1489 found to be not readable as a whole.
1491 Note loop condition -- if the range has 1 byte, we can't divide the range
1492 so there's no point trying further. */
1493 while (current_end
- current_begin
> 1)
1495 ULONGEST first_half_begin
, first_half_end
;
1496 ULONGEST second_half_begin
, second_half_end
;
1498 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1502 first_half_begin
= current_begin
;
1503 first_half_end
= middle
;
1504 second_half_begin
= middle
;
1505 second_half_end
= current_end
;
1509 first_half_begin
= middle
;
1510 first_half_end
= current_end
;
1511 second_half_begin
= current_begin
;
1512 second_half_end
= middle
;
1515 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1516 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1518 first_half_end
- first_half_begin
);
1520 if (xfer
== first_half_end
- first_half_begin
)
1522 /* This half reads up fine. So, the error must be in the
1524 current_begin
= second_half_begin
;
1525 current_end
= second_half_end
;
1529 /* This half is not readable. Because we've tried one byte, we
1530 know some part of this half if actually readable. Go to the next
1531 iteration to divide again and try to read.
1533 We don't handle the other half, because this function only tries
1534 to read a single readable subrange. */
1535 current_begin
= first_half_begin
;
1536 current_end
= first_half_end
;
1542 /* The [begin, current_begin) range has been read. */
1543 result
->emplace_back (begin
, current_end
, std::move (buf
));
1547 /* The [current_end, end) range has been read. */
1548 LONGEST region_len
= end
- current_end
;
1550 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1551 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1552 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1553 region_len
* unit_size
);
1554 result
->emplace_back (current_end
, end
, std::move (data
));
1558 std::vector
<memory_read_result
>
1559 read_memory_robust (struct target_ops
*ops
,
1560 const ULONGEST offset
, const LONGEST len
)
1562 std::vector
<memory_read_result
> result
;
1563 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1565 LONGEST xfered_total
= 0;
1566 while (xfered_total
< len
)
1568 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1571 /* If there is no explicit region, a fake one should be created. */
1572 gdb_assert (region
);
1574 if (region
->hi
== 0)
1575 region_len
= len
- xfered_total
;
1577 region_len
= region
->hi
- offset
;
1579 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1581 /* Cannot read this region. Note that we can end up here only
1582 if the region is explicitly marked inaccessible, or
1583 'inaccessible-by-default' is in effect. */
1584 xfered_total
+= region_len
;
1588 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1589 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1590 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1592 LONGEST xfered_partial
=
1593 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1594 offset
+ xfered_total
, to_read
);
1595 /* Call an observer, notifying them of the xfer progress? */
1596 if (xfered_partial
<= 0)
1598 /* Got an error reading full chunk. See if maybe we can read
1600 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1601 offset
+ xfered_total
+ to_read
,
1602 unit_size
, &result
);
1603 xfered_total
+= to_read
;
1607 result
.emplace_back (offset
+ xfered_total
,
1608 offset
+ xfered_total
+ xfered_partial
,
1609 std::move (buffer
));
1610 xfered_total
+= xfered_partial
;
1620 /* An alternative to target_write with progress callbacks. */
1623 target_write_with_progress (struct target_ops
*ops
,
1624 enum target_object object
,
1625 const char *annex
, const gdb_byte
*buf
,
1626 ULONGEST offset
, LONGEST len
,
1627 void (*progress
) (ULONGEST
, void *), void *baton
)
1629 LONGEST xfered_total
= 0;
1632 /* If we are writing to a memory object, find the length of an addressable
1633 unit for that architecture. */
1634 if (object
== TARGET_OBJECT_MEMORY
1635 || object
== TARGET_OBJECT_STACK_MEMORY
1636 || object
== TARGET_OBJECT_CODE_MEMORY
1637 || object
== TARGET_OBJECT_RAW_MEMORY
)
1638 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1640 /* Give the progress callback a chance to set up. */
1642 (*progress
) (0, baton
);
1644 while (xfered_total
< len
)
1646 ULONGEST xfered_partial
;
1647 enum target_xfer_status status
;
1649 status
= target_write_partial (ops
, object
, annex
,
1650 buf
+ xfered_total
* unit_size
,
1651 offset
+ xfered_total
, len
- xfered_total
,
1654 if (status
!= TARGET_XFER_OK
)
1655 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1658 (*progress
) (xfered_partial
, baton
);
1660 xfered_total
+= xfered_partial
;
1666 /* For docs on target_write see target.h. */
1669 target_write (struct target_ops
*ops
,
1670 enum target_object object
,
1671 const char *annex
, const gdb_byte
*buf
,
1672 ULONGEST offset
, LONGEST len
)
1674 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1678 /* Help for target_read_alloc and target_read_stralloc. See their comments
1681 template <typename T
>
1682 gdb::optional
<gdb::def_vector
<T
>>
1683 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1686 gdb::def_vector
<T
> buf
;
1688 const int chunk
= 4096;
1690 /* This function does not have a length parameter; it reads the
1691 entire OBJECT). Also, it doesn't support objects fetched partly
1692 from one target and partly from another (in a different stratum,
1693 e.g. a core file and an executable). Both reasons make it
1694 unsuitable for reading memory. */
1695 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1697 /* Start by reading up to 4K at a time. The target will throttle
1698 this number down if necessary. */
1701 ULONGEST xfered_len
;
1702 enum target_xfer_status status
;
1704 buf
.resize (buf_pos
+ chunk
);
1706 status
= target_read_partial (ops
, object
, annex
,
1707 (gdb_byte
*) &buf
[buf_pos
],
1711 if (status
== TARGET_XFER_EOF
)
1713 /* Read all there was. */
1714 buf
.resize (buf_pos
);
1717 else if (status
!= TARGET_XFER_OK
)
1719 /* An error occurred. */
1723 buf_pos
+= xfered_len
;
1731 gdb::optional
<gdb::byte_vector
>
1732 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1735 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1740 gdb::optional
<gdb::char_vector
>
1741 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1744 gdb::optional
<gdb::char_vector
> buf
1745 = target_read_alloc_1
<char> (ops
, object
, annex
);
1750 if (buf
->empty () || buf
->back () != '\0')
1751 buf
->push_back ('\0');
1753 /* Check for embedded NUL bytes; but allow trailing NULs. */
1754 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1755 it
!= buf
->end (); it
++)
1758 warning (_("target object %d, annex %s, "
1759 "contained unexpected null characters"),
1760 (int) object
, annex
? annex
: "(none)");
1767 /* Memory transfer methods. */
1770 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1773 /* This method is used to read from an alternate, non-current
1774 target. This read must bypass the overlay support (as symbols
1775 don't match this target), and GDB's internal cache (wrong cache
1776 for this target). */
1777 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1779 memory_error (TARGET_XFER_E_IO
, addr
);
1783 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1784 int len
, enum bfd_endian byte_order
)
1786 gdb_byte buf
[sizeof (ULONGEST
)];
1788 gdb_assert (len
<= sizeof (buf
));
1789 get_target_memory (ops
, addr
, buf
, len
);
1790 return extract_unsigned_integer (buf
, len
, byte_order
);
1796 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1797 struct bp_target_info
*bp_tgt
)
1799 if (!may_insert_breakpoints
)
1801 warning (_("May not insert breakpoints"));
1805 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1811 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1812 struct bp_target_info
*bp_tgt
,
1813 enum remove_bp_reason reason
)
1815 /* This is kind of a weird case to handle, but the permission might
1816 have been changed after breakpoints were inserted - in which case
1817 we should just take the user literally and assume that any
1818 breakpoints should be left in place. */
1819 if (!may_insert_breakpoints
)
1821 warning (_("May not remove breakpoints"));
1825 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1829 info_target_command (const char *args
, int from_tty
)
1831 int has_all_mem
= 0;
1833 if (symfile_objfile
!= NULL
)
1834 printf_unfiltered (_("Symbols from \"%s\".\n"),
1835 objfile_name (symfile_objfile
));
1837 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1839 if (!t
->has_memory ())
1842 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1845 printf_unfiltered (_("\tWhile running this, "
1846 "GDB does not access memory from...\n"));
1847 printf_unfiltered ("%s:\n", t
->longname ());
1849 has_all_mem
= t
->has_all_memory ();
1853 /* This function is called before any new inferior is created, e.g.
1854 by running a program, attaching, or connecting to a target.
1855 It cleans up any state from previous invocations which might
1856 change between runs. This is a subset of what target_preopen
1857 resets (things which might change between targets). */
1860 target_pre_inferior (int from_tty
)
1862 /* Clear out solib state. Otherwise the solib state of the previous
1863 inferior might have survived and is entirely wrong for the new
1864 target. This has been observed on GNU/Linux using glibc 2.3. How
1876 Cannot access memory at address 0xdeadbeef
1879 /* In some OSs, the shared library list is the same/global/shared
1880 across inferiors. If code is shared between processes, so are
1881 memory regions and features. */
1882 if (!gdbarch_has_global_solist (target_gdbarch ()))
1884 no_shared_libraries (NULL
, from_tty
);
1886 invalidate_target_mem_regions ();
1888 target_clear_description ();
1891 /* attach_flag may be set if the previous process associated with
1892 the inferior was attached to. */
1893 current_inferior ()->attach_flag
= 0;
1895 current_inferior ()->highest_thread_num
= 0;
1897 agent_capability_invalidate ();
1900 /* This is to be called by the open routine before it does
1904 target_preopen (int from_tty
)
1908 if (current_inferior ()->pid
!= 0)
1911 || !target_has_execution ()
1912 || query (_("A program is being debugged already. Kill it? ")))
1914 /* Core inferiors actually should be detached, not
1916 if (target_has_execution ())
1919 target_detach (current_inferior (), 0);
1922 error (_("Program not killed."));
1925 /* Calling target_kill may remove the target from the stack. But if
1926 it doesn't (which seems like a win for UDI), remove it now. */
1927 /* Leave the exec target, though. The user may be switching from a
1928 live process to a core of the same program. */
1929 pop_all_targets_above (file_stratum
);
1931 target_pre_inferior (from_tty
);
1937 target_detach (inferior
*inf
, int from_tty
)
1939 /* After we have detached, we will clear the register cache for this inferior
1940 by calling registers_changed_ptid. We must save the pid_ptid before
1941 detaching, as the target detach method will clear inf->pid. */
1942 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
1944 /* As long as some to_detach implementations rely on the current_inferior
1945 (either directly, or indirectly, like through target_gdbarch or by
1946 reading memory), INF needs to be the current inferior. When that
1947 requirement will become no longer true, then we can remove this
1949 gdb_assert (inf
== current_inferior ());
1951 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
1952 /* Don't remove global breakpoints here. They're removed on
1953 disconnection from the target. */
1956 /* If we're in breakpoints-always-inserted mode, have to remove
1957 breakpoints before detaching. */
1958 remove_breakpoints_inf (current_inferior ());
1960 prepare_for_detach ();
1962 /* Hold a strong reference because detaching may unpush the
1964 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
1966 current_top_target ()->detach (inf
, from_tty
);
1968 process_stratum_target
*proc_target
1969 = as_process_stratum_target (proc_target_ref
.get ());
1971 registers_changed_ptid (proc_target
, save_pid_ptid
);
1973 /* We have to ensure we have no frame cache left. Normally,
1974 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
1975 inferior_ptid matches save_pid_ptid, but in our case, it does not
1976 call it, as inferior_ptid has been reset. */
1977 reinit_frame_cache ();
1981 target_disconnect (const char *args
, int from_tty
)
1983 /* If we're in breakpoints-always-inserted mode or if breakpoints
1984 are global across processes, we have to remove them before
1986 remove_breakpoints ();
1988 current_top_target ()->disconnect (args
, from_tty
);
1991 /* See target/target.h. */
1994 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
1995 target_wait_flags options
)
1997 return current_top_target ()->wait (ptid
, status
, options
);
2003 default_target_wait (struct target_ops
*ops
,
2004 ptid_t ptid
, struct target_waitstatus
*status
,
2005 target_wait_flags options
)
2007 status
->kind
= TARGET_WAITKIND_IGNORE
;
2008 return minus_one_ptid
;
2012 target_pid_to_str (ptid_t ptid
)
2014 return current_top_target ()->pid_to_str (ptid
);
2018 target_thread_name (struct thread_info
*info
)
2020 gdb_assert (info
->inf
== current_inferior ());
2022 return current_top_target ()->thread_name (info
);
2025 struct thread_info
*
2026 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2028 struct inferior
*inf
)
2030 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2037 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2039 return current_top_target ()->thread_info_to_thread_handle (tip
);
2043 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2045 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2047 target_dcache_invalidate ();
2049 current_top_target ()->resume (ptid
, step
, signal
);
2051 registers_changed_ptid (curr_target
, ptid
);
2052 /* We only set the internal executing state here. The user/frontend
2053 running state is set at a higher level. This also clears the
2054 thread's stop_pc as side effect. */
2055 set_executing (curr_target
, ptid
, true);
2056 clear_inline_frame_state (curr_target
, ptid
);
2059 /* If true, target_commit_resume is a nop. */
2060 static int defer_target_commit_resume
;
2065 target_commit_resume (void)
2067 if (defer_target_commit_resume
)
2070 current_top_target ()->commit_resume ();
2075 scoped_restore_tmpl
<int>
2076 make_scoped_defer_target_commit_resume ()
2078 return make_scoped_restore (&defer_target_commit_resume
, 1);
2082 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2084 current_top_target ()->pass_signals (pass_signals
);
2088 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2090 current_top_target ()->program_signals (program_signals
);
2094 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2097 /* Some target returned a fork event, but did not know how to follow it. */
2098 internal_error (__FILE__
, __LINE__
,
2099 _("could not find a target to follow fork"));
2102 /* Look through the list of possible targets for a target that can
2106 target_follow_fork (bool follow_child
, bool detach_fork
)
2108 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2111 /* Target wrapper for follow exec hook. */
2114 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2116 current_top_target ()->follow_exec (inf
, execd_pathname
);
2120 default_mourn_inferior (struct target_ops
*self
)
2122 internal_error (__FILE__
, __LINE__
,
2123 _("could not find a target to follow mourn inferior"));
2127 target_mourn_inferior (ptid_t ptid
)
2129 gdb_assert (ptid
== inferior_ptid
);
2130 current_top_target ()->mourn_inferior ();
2132 /* We no longer need to keep handles on any of the object files.
2133 Make sure to release them to avoid unnecessarily locking any
2134 of them while we're not actually debugging. */
2135 bfd_cache_close_all ();
2138 /* Look for a target which can describe architectural features, starting
2139 from TARGET. If we find one, return its description. */
2141 const struct target_desc
*
2142 target_read_description (struct target_ops
*target
)
2144 return target
->read_description ();
2148 /* Default implementation of memory-searching. */
2151 default_search_memory (struct target_ops
*self
,
2152 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2153 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2154 CORE_ADDR
*found_addrp
)
2156 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
2158 return target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
2159 result
, addr
, len
) == len
;
2162 /* Start over from the top of the target stack. */
2163 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
2164 pattern
, pattern_len
, found_addrp
);
2167 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2168 sequence of bytes in PATTERN with length PATTERN_LEN.
2170 The result is 1 if found, 0 if not found, and -1 if there was an error
2171 requiring halting of the search (e.g. memory read error).
2172 If the pattern is found the address is recorded in FOUND_ADDRP. */
2175 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2176 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2177 CORE_ADDR
*found_addrp
)
2179 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2180 pattern
, pattern_len
, found_addrp
);
2183 /* Look through the currently pushed targets. If none of them will
2184 be able to restart the currently running process, issue an error
2188 target_require_runnable (void)
2190 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2192 /* If this target knows how to create a new program, then
2193 assume we will still be able to after killing the current
2194 one. Either killing and mourning will not pop T, or else
2195 find_default_run_target will find it again. */
2196 if (t
->can_create_inferior ())
2199 /* Do not worry about targets at certain strata that can not
2200 create inferiors. Assume they will be pushed again if
2201 necessary, and continue to the process_stratum. */
2202 if (t
->stratum () > process_stratum
)
2205 error (_("The \"%s\" target does not support \"run\". "
2206 "Try \"help target\" or \"continue\"."),
2210 /* This function is only called if the target is running. In that
2211 case there should have been a process_stratum target and it
2212 should either know how to create inferiors, or not... */
2213 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2216 /* Whether GDB is allowed to fall back to the default run target for
2217 "run", "attach", etc. when no target is connected yet. */
2218 static bool auto_connect_native_target
= true;
2221 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2222 struct cmd_list_element
*c
, const char *value
)
2224 fprintf_filtered (file
,
2225 _("Whether GDB may automatically connect to the "
2226 "native target is %s.\n"),
2230 /* A pointer to the target that can respond to "run" or "attach".
2231 Native targets are always singletons and instantiated early at GDB
2233 static target_ops
*the_native_target
;
2238 set_native_target (target_ops
*target
)
2240 if (the_native_target
!= NULL
)
2241 internal_error (__FILE__
, __LINE__
,
2242 _("native target already set (\"%s\")."),
2243 the_native_target
->longname ());
2245 the_native_target
= target
;
2251 get_native_target ()
2253 return the_native_target
;
2256 /* Look through the list of possible targets for a target that can
2257 execute a run or attach command without any other data. This is
2258 used to locate the default process stratum.
2260 If DO_MESG is not NULL, the result is always valid (error() is
2261 called for errors); else, return NULL on error. */
2263 static struct target_ops
*
2264 find_default_run_target (const char *do_mesg
)
2266 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2267 return the_native_target
;
2269 if (do_mesg
!= NULL
)
2270 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2277 find_attach_target (void)
2279 /* If a target on the current stack can attach, use it. */
2280 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2282 if (t
->can_attach ())
2286 /* Otherwise, use the default run target for attaching. */
2287 return find_default_run_target ("attach");
2293 find_run_target (void)
2295 /* If a target on the current stack can run, use it. */
2296 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2298 if (t
->can_create_inferior ())
2302 /* Otherwise, use the default run target. */
2303 return find_default_run_target ("run");
2307 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2312 /* Implement the "info proc" command. */
2315 target_info_proc (const char *args
, enum info_proc_what what
)
2317 struct target_ops
*t
;
2319 /* If we're already connected to something that can get us OS
2320 related data, use it. Otherwise, try using the native
2322 t
= find_target_at (process_stratum
);
2324 t
= find_default_run_target (NULL
);
2326 for (; t
!= NULL
; t
= t
->beneath ())
2328 if (t
->info_proc (args
, what
))
2331 fprintf_unfiltered (gdb_stdlog
,
2332 "target_info_proc (\"%s\", %d)\n", args
, what
);
2342 find_default_supports_disable_randomization (struct target_ops
*self
)
2344 struct target_ops
*t
;
2346 t
= find_default_run_target (NULL
);
2348 return t
->supports_disable_randomization ();
2353 target_supports_disable_randomization (void)
2355 return current_top_target ()->supports_disable_randomization ();
2358 /* See target/target.h. */
2361 target_supports_multi_process (void)
2363 return current_top_target ()->supports_multi_process ();
2368 gdb::optional
<gdb::char_vector
>
2369 target_get_osdata (const char *type
)
2371 struct target_ops
*t
;
2373 /* If we're already connected to something that can get us OS
2374 related data, use it. Otherwise, try using the native
2376 t
= find_target_at (process_stratum
);
2378 t
= find_default_run_target ("get OS data");
2383 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2386 /* Determine the current address space of thread PTID. */
2388 struct address_space
*
2389 target_thread_address_space (ptid_t ptid
)
2391 struct address_space
*aspace
;
2393 aspace
= current_top_target ()->thread_address_space (ptid
);
2394 gdb_assert (aspace
!= NULL
);
2402 target_ops::beneath () const
2404 return current_inferior ()->find_target_beneath (this);
2408 target_ops::close ()
2413 target_ops::can_attach ()
2419 target_ops::attach (const char *, int)
2421 gdb_assert_not_reached ("target_ops::attach called");
2425 target_ops::can_create_inferior ()
2431 target_ops::create_inferior (const char *, const std::string
&,
2434 gdb_assert_not_reached ("target_ops::create_inferior called");
2438 target_ops::can_run ()
2446 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2455 /* Target file operations. */
2457 static struct target_ops
*
2458 default_fileio_target (void)
2460 struct target_ops
*t
;
2462 /* If we're already connected to something that can perform
2463 file I/O, use it. Otherwise, try using the native target. */
2464 t
= find_target_at (process_stratum
);
2467 return find_default_run_target ("file I/O");
2470 /* File handle for target file operations. */
2474 /* The target on which this file is open. NULL if the target is
2475 meanwhile closed while the handle is open. */
2478 /* The file descriptor on the target. */
2481 /* Check whether this fileio_fh_t represents a closed file. */
2484 return target_fd
< 0;
2488 /* Vector of currently open file handles. The value returned by
2489 target_fileio_open and passed as the FD argument to other
2490 target_fileio_* functions is an index into this vector. This
2491 vector's entries are never freed; instead, files are marked as
2492 closed, and the handle becomes available for reuse. */
2493 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2495 /* Index into fileio_fhandles of the lowest handle that might be
2496 closed. This permits handle reuse without searching the whole
2497 list each time a new file is opened. */
2498 static int lowest_closed_fd
;
2500 /* Invalidate the target associated with open handles that were open
2501 on target TARG, since we're about to close (and maybe destroy) the
2502 target. The handles remain open from the client's perspective, but
2503 trying to do anything with them other than closing them will fail
2507 fileio_handles_invalidate_target (target_ops
*targ
)
2509 for (fileio_fh_t
&fh
: fileio_fhandles
)
2510 if (fh
.target
== targ
)
2514 /* Acquire a target fileio file descriptor. */
2517 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2519 /* Search for closed handles to reuse. */
2520 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2522 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2524 if (fh
.is_closed ())
2528 /* Push a new handle if no closed handles were found. */
2529 if (lowest_closed_fd
== fileio_fhandles
.size ())
2530 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2532 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2534 /* Should no longer be marked closed. */
2535 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2537 /* Return its index, and start the next lookup at
2539 return lowest_closed_fd
++;
2542 /* Release a target fileio file descriptor. */
2545 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2548 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2551 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2553 static fileio_fh_t
*
2554 fileio_fd_to_fh (int fd
)
2556 return &fileio_fhandles
[fd
];
2560 /* Default implementations of file i/o methods. We don't want these
2561 to delegate automatically, because we need to know which target
2562 supported the method, in order to call it directly from within
2563 pread/pwrite, etc. */
2566 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2567 int flags
, int mode
, int warn_if_slow
,
2570 *target_errno
= FILEIO_ENOSYS
;
2575 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2576 ULONGEST offset
, int *target_errno
)
2578 *target_errno
= FILEIO_ENOSYS
;
2583 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2584 ULONGEST offset
, int *target_errno
)
2586 *target_errno
= FILEIO_ENOSYS
;
2591 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2593 *target_errno
= FILEIO_ENOSYS
;
2598 target_ops::fileio_close (int fd
, int *target_errno
)
2600 *target_errno
= FILEIO_ENOSYS
;
2605 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2608 *target_errno
= FILEIO_ENOSYS
;
2612 gdb::optional
<std::string
>
2613 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2616 *target_errno
= FILEIO_ENOSYS
;
2623 target_fileio_open (struct inferior
*inf
, const char *filename
,
2624 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
2626 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2628 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2629 warn_if_slow
, target_errno
);
2631 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2637 fd
= acquire_fileio_fd (t
, fd
);
2640 fprintf_unfiltered (gdb_stdlog
,
2641 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2643 inf
== NULL
? 0 : inf
->num
,
2644 filename
, flags
, mode
,
2646 fd
!= -1 ? 0 : *target_errno
);
2650 *target_errno
= FILEIO_ENOSYS
;
2657 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2658 ULONGEST offset
, int *target_errno
)
2660 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2663 if (fh
->is_closed ())
2664 *target_errno
= EBADF
;
2665 else if (fh
->target
== NULL
)
2666 *target_errno
= EIO
;
2668 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2669 len
, offset
, target_errno
);
2672 fprintf_unfiltered (gdb_stdlog
,
2673 "target_fileio_pwrite (%d,...,%d,%s) "
2675 fd
, len
, pulongest (offset
),
2676 ret
, ret
!= -1 ? 0 : *target_errno
);
2683 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2684 ULONGEST offset
, int *target_errno
)
2686 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2689 if (fh
->is_closed ())
2690 *target_errno
= EBADF
;
2691 else if (fh
->target
== NULL
)
2692 *target_errno
= EIO
;
2694 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2695 len
, offset
, target_errno
);
2698 fprintf_unfiltered (gdb_stdlog
,
2699 "target_fileio_pread (%d,...,%d,%s) "
2701 fd
, len
, pulongest (offset
),
2702 ret
, ret
!= -1 ? 0 : *target_errno
);
2709 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2711 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2714 if (fh
->is_closed ())
2715 *target_errno
= EBADF
;
2716 else if (fh
->target
== NULL
)
2717 *target_errno
= EIO
;
2719 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2722 fprintf_unfiltered (gdb_stdlog
,
2723 "target_fileio_fstat (%d) = %d (%d)\n",
2724 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2731 target_fileio_close (int fd
, int *target_errno
)
2733 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2736 if (fh
->is_closed ())
2737 *target_errno
= EBADF
;
2740 if (fh
->target
!= NULL
)
2741 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2745 release_fileio_fd (fd
, fh
);
2749 fprintf_unfiltered (gdb_stdlog
,
2750 "target_fileio_close (%d) = %d (%d)\n",
2751 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2758 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2761 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2763 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2765 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2769 fprintf_unfiltered (gdb_stdlog
,
2770 "target_fileio_unlink (%d,%s)"
2772 inf
== NULL
? 0 : inf
->num
, filename
,
2773 ret
, ret
!= -1 ? 0 : *target_errno
);
2777 *target_errno
= FILEIO_ENOSYS
;
2783 gdb::optional
<std::string
>
2784 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2787 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2789 gdb::optional
<std::string
> ret
2790 = t
->fileio_readlink (inf
, filename
, target_errno
);
2792 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2796 fprintf_unfiltered (gdb_stdlog
,
2797 "target_fileio_readlink (%d,%s)"
2799 inf
== NULL
? 0 : inf
->num
,
2800 filename
, ret
? ret
->c_str () : "(nil)",
2801 ret
? 0 : *target_errno
);
2805 *target_errno
= FILEIO_ENOSYS
;
2809 /* Like scoped_fd, but specific to target fileio. */
2811 class scoped_target_fd
2814 explicit scoped_target_fd (int fd
) noexcept
2819 ~scoped_target_fd ()
2825 target_fileio_close (m_fd
, &target_errno
);
2829 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
2831 int get () const noexcept
2840 /* Read target file FILENAME, in the filesystem as seen by INF. If
2841 INF is NULL, use the filesystem seen by the debugger (GDB or, for
2842 remote targets, the remote stub). Store the result in *BUF_P and
2843 return the size of the transferred data. PADDING additional bytes
2844 are available in *BUF_P. This is a helper function for
2845 target_fileio_read_alloc; see the declaration of that function for
2846 more information. */
2849 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
2850 gdb_byte
**buf_p
, int padding
)
2852 size_t buf_alloc
, buf_pos
;
2857 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
2858 0700, false, &target_errno
));
2859 if (fd
.get () == -1)
2862 /* Start by reading up to 4K at a time. The target will throttle
2863 this number down if necessary. */
2865 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
2869 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
2870 buf_alloc
- buf_pos
- padding
, buf_pos
,
2874 /* An error occurred. */
2880 /* Read all there was. */
2890 /* If the buffer is filling up, expand it. */
2891 if (buf_alloc
< buf_pos
* 2)
2894 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
2904 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
2907 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
2912 gdb::unique_xmalloc_ptr
<char>
2913 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
2917 LONGEST i
, transferred
;
2919 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
2920 bufstr
= (char *) buffer
;
2922 if (transferred
< 0)
2923 return gdb::unique_xmalloc_ptr
<char> (nullptr);
2925 if (transferred
== 0)
2926 return make_unique_xstrdup ("");
2928 bufstr
[transferred
] = 0;
2930 /* Check for embedded NUL bytes; but allow trailing NULs. */
2931 for (i
= strlen (bufstr
); i
< transferred
; i
++)
2934 warning (_("target file %s "
2935 "contained unexpected null characters"),
2940 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
2945 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
2946 CORE_ADDR addr
, int len
)
2948 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
2952 default_watchpoint_addr_within_range (struct target_ops
*target
,
2954 CORE_ADDR start
, int length
)
2956 return addr
>= start
&& addr
< start
+ length
;
2962 target_stack::find_beneath (const target_ops
*t
) const
2964 /* Look for a non-empty slot at stratum levels beneath T's. */
2965 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
2966 if (m_stack
[stratum
] != NULL
)
2967 return m_stack
[stratum
];
2975 find_target_at (enum strata stratum
)
2977 return current_inferior ()->target_at (stratum
);
2985 target_announce_detach (int from_tty
)
2988 const char *exec_file
;
2993 exec_file
= get_exec_file (0);
2994 if (exec_file
== NULL
)
2997 pid
= inferior_ptid
.pid ();
2998 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
2999 target_pid_to_str (ptid_t (pid
)).c_str ());
3002 /* The inferior process has died. Long live the inferior! */
3005 generic_mourn_inferior (void)
3007 inferior
*inf
= current_inferior ();
3009 switch_to_no_thread ();
3011 /* Mark breakpoints uninserted in case something tries to delete a
3012 breakpoint while we delete the inferior's threads (which would
3013 fail, since the inferior is long gone). */
3014 mark_breakpoints_out ();
3017 exit_inferior (inf
);
3019 /* Note this wipes step-resume breakpoints, so needs to be done
3020 after exit_inferior, which ends up referencing the step-resume
3021 breakpoints through clear_thread_inferior_resources. */
3022 breakpoint_init_inferior (inf_exited
);
3024 registers_changed ();
3026 reopen_exec_file ();
3027 reinit_frame_cache ();
3029 if (deprecated_detach_hook
)
3030 deprecated_detach_hook ();
3033 /* Convert a normal process ID to a string. Returns the string in a
3037 normal_pid_to_str (ptid_t ptid
)
3039 return string_printf ("process %d", ptid
.pid ());
3043 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3045 return normal_pid_to_str (ptid
);
3048 /* Error-catcher for target_find_memory_regions. */
3050 dummy_find_memory_regions (struct target_ops
*self
,
3051 find_memory_region_ftype ignore1
, void *ignore2
)
3053 error (_("Command not implemented for this target."));
3057 /* Error-catcher for target_make_corefile_notes. */
3059 dummy_make_corefile_notes (struct target_ops
*self
,
3060 bfd
*ignore1
, int *ignore2
)
3062 error (_("Command not implemented for this target."));
3066 #include "target-delegates.c"
3068 /* The initial current target, so that there is always a semi-valid
3071 static dummy_target the_dummy_target
;
3078 return &the_dummy_target
;
3081 static const target_info dummy_target_info
= {
3088 dummy_target::stratum () const
3090 return dummy_stratum
;
3094 debug_target::stratum () const
3096 return debug_stratum
;
3100 dummy_target::info () const
3102 return dummy_target_info
;
3106 debug_target::info () const
3108 return beneath ()->info ();
3114 target_close (struct target_ops
*targ
)
3116 gdb_assert (!target_is_pushed (targ
));
3118 fileio_handles_invalidate_target (targ
);
3123 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3127 target_thread_alive (ptid_t ptid
)
3129 return current_top_target ()->thread_alive (ptid
);
3133 target_update_thread_list (void)
3135 current_top_target ()->update_thread_list ();
3139 target_stop (ptid_t ptid
)
3143 warning (_("May not interrupt or stop the target, ignoring attempt"));
3147 current_top_target ()->stop (ptid
);
3155 warning (_("May not interrupt or stop the target, ignoring attempt"));
3159 current_top_target ()->interrupt ();
3165 target_pass_ctrlc (void)
3167 /* Pass the Ctrl-C to the first target that has a thread
3169 for (inferior
*inf
: all_inferiors ())
3171 target_ops
*proc_target
= inf
->process_target ();
3172 if (proc_target
== NULL
)
3175 for (thread_info
*thr
: inf
->non_exited_threads ())
3177 /* A thread can be THREAD_STOPPED and executing, while
3178 running an infcall. */
3179 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3181 /* We can get here quite deep in target layers. Avoid
3182 switching thread context or anything that would
3183 communicate with the target (e.g., to fetch
3184 registers), or flushing e.g., the frame cache. We
3185 just switch inferior in order to be able to call
3186 through the target_stack. */
3187 scoped_restore_current_inferior restore_inferior
;
3188 set_current_inferior (inf
);
3189 current_top_target ()->pass_ctrlc ();
3199 default_target_pass_ctrlc (struct target_ops
*ops
)
3201 target_interrupt ();
3204 /* See target/target.h. */
3207 target_stop_and_wait (ptid_t ptid
)
3209 struct target_waitstatus status
;
3210 bool was_non_stop
= non_stop
;
3215 memset (&status
, 0, sizeof (status
));
3216 target_wait (ptid
, &status
, 0);
3218 non_stop
= was_non_stop
;
3221 /* See target/target.h. */
3224 target_continue_no_signal (ptid_t ptid
)
3226 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3229 /* See target/target.h. */
3232 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3234 target_resume (ptid
, 0, signal
);
3237 /* Concatenate ELEM to LIST, a comma-separated list. */
3240 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3242 if (!list
->empty ())
3243 list
->append (", ");
3245 list
->append (elem
);
3248 /* Helper for target_options_to_string. If OPT is present in
3249 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3250 OPT is removed from TARGET_OPTIONS. */
3253 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3254 target_wait_flag opt
, const char *opt_str
)
3256 if ((*target_options
& opt
) != 0)
3258 str_comma_list_concat_elem (ret
, opt_str
);
3259 *target_options
&= ~opt
;
3266 target_options_to_string (target_wait_flags target_options
)
3270 #define DO_TARG_OPTION(OPT) \
3271 do_option (&target_options, &ret, OPT, #OPT)
3273 DO_TARG_OPTION (TARGET_WNOHANG
);
3275 if (target_options
!= 0)
3276 str_comma_list_concat_elem (&ret
, "unknown???");
3282 target_fetch_registers (struct regcache
*regcache
, int regno
)
3284 current_top_target ()->fetch_registers (regcache
, regno
);
3286 regcache
->debug_print_register ("target_fetch_registers", regno
);
3290 target_store_registers (struct regcache
*regcache
, int regno
)
3292 if (!may_write_registers
)
3293 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3295 current_top_target ()->store_registers (regcache
, regno
);
3298 regcache
->debug_print_register ("target_store_registers", regno
);
3303 target_core_of_thread (ptid_t ptid
)
3305 return current_top_target ()->core_of_thread (ptid
);
3309 simple_verify_memory (struct target_ops
*ops
,
3310 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3312 LONGEST total_xfered
= 0;
3314 while (total_xfered
< size
)
3316 ULONGEST xfered_len
;
3317 enum target_xfer_status status
;
3319 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3321 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3322 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3324 if (status
== TARGET_XFER_OK
3325 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3327 total_xfered
+= xfered_len
;
3336 /* Default implementation of memory verification. */
3339 default_verify_memory (struct target_ops
*self
,
3340 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3342 /* Start over from the top of the target stack. */
3343 return simple_verify_memory (current_top_target (),
3344 data
, memaddr
, size
);
3348 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3350 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3353 /* The documentation for this function is in its prototype declaration in
3357 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3358 enum target_hw_bp_type rw
)
3360 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3363 /* The documentation for this function is in its prototype declaration in
3367 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3368 enum target_hw_bp_type rw
)
3370 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3373 /* The documentation for this function is in its prototype declaration
3377 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3379 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3382 /* The documentation for this function is in its prototype declaration
3386 target_ranged_break_num_registers (void)
3388 return current_top_target ()->ranged_break_num_registers ();
3393 struct btrace_target_info
*
3394 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3396 return current_top_target ()->enable_btrace (ptid
, conf
);
3402 target_disable_btrace (struct btrace_target_info
*btinfo
)
3404 current_top_target ()->disable_btrace (btinfo
);
3410 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3412 current_top_target ()->teardown_btrace (btinfo
);
3418 target_read_btrace (struct btrace_data
*btrace
,
3419 struct btrace_target_info
*btinfo
,
3420 enum btrace_read_type type
)
3422 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3427 const struct btrace_config
*
3428 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3430 return current_top_target ()->btrace_conf (btinfo
);
3436 target_stop_recording (void)
3438 current_top_target ()->stop_recording ();
3444 target_save_record (const char *filename
)
3446 current_top_target ()->save_record (filename
);
3452 target_supports_delete_record ()
3454 return current_top_target ()->supports_delete_record ();
3460 target_delete_record (void)
3462 current_top_target ()->delete_record ();
3468 target_record_method (ptid_t ptid
)
3470 return current_top_target ()->record_method (ptid
);
3476 target_record_is_replaying (ptid_t ptid
)
3478 return current_top_target ()->record_is_replaying (ptid
);
3484 target_record_will_replay (ptid_t ptid
, int dir
)
3486 return current_top_target ()->record_will_replay (ptid
, dir
);
3492 target_record_stop_replaying (void)
3494 current_top_target ()->record_stop_replaying ();
3500 target_goto_record_begin (void)
3502 current_top_target ()->goto_record_begin ();
3508 target_goto_record_end (void)
3510 current_top_target ()->goto_record_end ();
3516 target_goto_record (ULONGEST insn
)
3518 current_top_target ()->goto_record (insn
);
3524 target_insn_history (int size
, gdb_disassembly_flags flags
)
3526 current_top_target ()->insn_history (size
, flags
);
3532 target_insn_history_from (ULONGEST from
, int size
,
3533 gdb_disassembly_flags flags
)
3535 current_top_target ()->insn_history_from (from
, size
, flags
);
3541 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3542 gdb_disassembly_flags flags
)
3544 current_top_target ()->insn_history_range (begin
, end
, flags
);
3550 target_call_history (int size
, record_print_flags flags
)
3552 current_top_target ()->call_history (size
, flags
);
3558 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3560 current_top_target ()->call_history_from (begin
, size
, flags
);
3566 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3568 current_top_target ()->call_history_range (begin
, end
, flags
);
3573 const struct frame_unwind
*
3574 target_get_unwinder (void)
3576 return current_top_target ()->get_unwinder ();
3581 const struct frame_unwind
*
3582 target_get_tailcall_unwinder (void)
3584 return current_top_target ()->get_tailcall_unwinder ();
3590 target_prepare_to_generate_core (void)
3592 current_top_target ()->prepare_to_generate_core ();
3598 target_done_generating_core (void)
3600 current_top_target ()->done_generating_core ();
3605 static char targ_desc
[] =
3606 "Names of targets and files being debugged.\nShows the entire \
3607 stack of targets currently in use (including the exec-file,\n\
3608 core-file, and process, if any), as well as the symbol file name.";
3611 default_rcmd (struct target_ops
*self
, const char *command
,
3612 struct ui_file
*output
)
3614 error (_("\"monitor\" command not supported by this target."));
3618 do_monitor_command (const char *cmd
, int from_tty
)
3620 target_rcmd (cmd
, gdb_stdtarg
);
3623 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3627 flash_erase_command (const char *cmd
, int from_tty
)
3629 /* Used to communicate termination of flash operations to the target. */
3630 bool found_flash_region
= false;
3631 struct gdbarch
*gdbarch
= target_gdbarch ();
3633 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3635 /* Iterate over all memory regions. */
3636 for (const mem_region
&m
: mem_regions
)
3638 /* Is this a flash memory region? */
3639 if (m
.attrib
.mode
== MEM_FLASH
)
3641 found_flash_region
= true;
3642 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3644 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3646 current_uiout
->message (_("Erasing flash memory region at address "));
3647 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3648 current_uiout
->message (", size = ");
3649 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3650 current_uiout
->message ("\n");
3654 /* Did we do any flash operations? If so, we need to finalize them. */
3655 if (found_flash_region
)
3656 target_flash_done ();
3658 current_uiout
->message (_("No flash memory regions found.\n"));
3661 /* Print the name of each layers of our target stack. */
3664 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3666 printf_filtered (_("The current target stack is:\n"));
3668 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3670 if (t
->stratum () == debug_stratum
)
3672 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3679 target_async (int enable
)
3681 infrun_async (enable
);
3682 current_top_target ()->async (enable
);
3688 target_thread_events (int enable
)
3690 current_top_target ()->thread_events (enable
);
3693 /* Controls if targets can report that they can/are async. This is
3694 just for maintainers to use when debugging gdb. */
3695 bool target_async_permitted
= true;
3697 /* The set command writes to this variable. If the inferior is
3698 executing, target_async_permitted is *not* updated. */
3699 static bool target_async_permitted_1
= true;
3702 maint_set_target_async_command (const char *args
, int from_tty
,
3703 struct cmd_list_element
*c
)
3705 if (have_live_inferiors ())
3707 target_async_permitted_1
= target_async_permitted
;
3708 error (_("Cannot change this setting while the inferior is running."));
3711 target_async_permitted
= target_async_permitted_1
;
3715 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3716 struct cmd_list_element
*c
,
3719 fprintf_filtered (file
,
3720 _("Controlling the inferior in "
3721 "asynchronous mode is %s.\n"), value
);
3724 /* Return true if the target operates in non-stop mode even with "set
3728 target_always_non_stop_p (void)
3730 return current_top_target ()->always_non_stop_p ();
3736 target_is_non_stop_p (void)
3739 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3740 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3741 && target_always_non_stop_p ()));
3747 exists_non_stop_target ()
3749 if (target_is_non_stop_p ())
3752 scoped_restore_current_thread restore_thread
;
3754 for (inferior
*inf
: all_inferiors ())
3756 switch_to_inferior_no_thread (inf
);
3757 if (target_is_non_stop_p ())
3764 /* Controls if targets can report that they always run in non-stop
3765 mode. This is just for maintainers to use when debugging gdb. */
3766 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3768 /* The set command writes to this variable. If the inferior is
3769 executing, target_non_stop_enabled is *not* updated. */
3770 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3772 /* Implementation of "maint set target-non-stop". */
3775 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3776 struct cmd_list_element
*c
)
3778 if (have_live_inferiors ())
3780 target_non_stop_enabled_1
= target_non_stop_enabled
;
3781 error (_("Cannot change this setting while the inferior is running."));
3784 target_non_stop_enabled
= target_non_stop_enabled_1
;
3787 /* Implementation of "maint show target-non-stop". */
3790 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3791 struct cmd_list_element
*c
,
3794 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3795 fprintf_filtered (file
,
3796 _("Whether the target is always in non-stop mode "
3797 "is %s (currently %s).\n"), value
,
3798 target_always_non_stop_p () ? "on" : "off");
3800 fprintf_filtered (file
,
3801 _("Whether the target is always in non-stop mode "
3802 "is %s.\n"), value
);
3805 /* Temporary copies of permission settings. */
3807 static bool may_write_registers_1
= true;
3808 static bool may_write_memory_1
= true;
3809 static bool may_insert_breakpoints_1
= true;
3810 static bool may_insert_tracepoints_1
= true;
3811 static bool may_insert_fast_tracepoints_1
= true;
3812 static bool may_stop_1
= true;
3814 /* Make the user-set values match the real values again. */
3817 update_target_permissions (void)
3819 may_write_registers_1
= may_write_registers
;
3820 may_write_memory_1
= may_write_memory
;
3821 may_insert_breakpoints_1
= may_insert_breakpoints
;
3822 may_insert_tracepoints_1
= may_insert_tracepoints
;
3823 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3824 may_stop_1
= may_stop
;
3827 /* The one function handles (most of) the permission flags in the same
3831 set_target_permissions (const char *args
, int from_tty
,
3832 struct cmd_list_element
*c
)
3834 if (target_has_execution ())
3836 update_target_permissions ();
3837 error (_("Cannot change this setting while the inferior is running."));
3840 /* Make the real values match the user-changed values. */
3841 may_write_registers
= may_write_registers_1
;
3842 may_insert_breakpoints
= may_insert_breakpoints_1
;
3843 may_insert_tracepoints
= may_insert_tracepoints_1
;
3844 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3845 may_stop
= may_stop_1
;
3846 update_observer_mode ();
3849 /* Set memory write permission independently of observer mode. */
3852 set_write_memory_permission (const char *args
, int from_tty
,
3853 struct cmd_list_element
*c
)
3855 /* Make the real values match the user-changed values. */
3856 may_write_memory
= may_write_memory_1
;
3857 update_observer_mode ();
3860 void _initialize_target ();
3863 _initialize_target ()
3865 the_debug_target
= new debug_target ();
3867 add_info ("target", info_target_command
, targ_desc
);
3868 add_info ("files", info_target_command
, targ_desc
);
3870 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3871 Set target debugging."), _("\
3872 Show target debugging."), _("\
3873 When non-zero, target debugging is enabled. Higher numbers are more\n\
3877 &setdebuglist
, &showdebuglist
);
3879 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3880 &trust_readonly
, _("\
3881 Set mode for reading from readonly sections."), _("\
3882 Show mode for reading from readonly sections."), _("\
3883 When this mode is on, memory reads from readonly sections (such as .text)\n\
3884 will be read from the object file instead of from the target. This will\n\
3885 result in significant performance improvement for remote targets."),
3887 show_trust_readonly
,
3888 &setlist
, &showlist
);
3890 add_com ("monitor", class_obscure
, do_monitor_command
,
3891 _("Send a command to the remote monitor (remote targets only)."));
3893 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3894 _("Print the name of each layer of the internal target stack."),
3895 &maintenanceprintlist
);
3897 add_setshow_boolean_cmd ("target-async", no_class
,
3898 &target_async_permitted_1
, _("\
3899 Set whether gdb controls the inferior in asynchronous mode."), _("\
3900 Show whether gdb controls the inferior in asynchronous mode."), _("\
3901 Tells gdb whether to control the inferior in asynchronous mode."),
3902 maint_set_target_async_command
,
3903 maint_show_target_async_command
,
3904 &maintenance_set_cmdlist
,
3905 &maintenance_show_cmdlist
);
3907 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
3908 &target_non_stop_enabled_1
, _("\
3909 Set whether gdb always controls the inferior in non-stop mode."), _("\
3910 Show whether gdb always controls the inferior in non-stop mode."), _("\
3911 Tells gdb whether to control the inferior in non-stop mode."),
3912 maint_set_target_non_stop_command
,
3913 maint_show_target_non_stop_command
,
3914 &maintenance_set_cmdlist
,
3915 &maintenance_show_cmdlist
);
3917 add_setshow_boolean_cmd ("may-write-registers", class_support
,
3918 &may_write_registers_1
, _("\
3919 Set permission to write into registers."), _("\
3920 Show permission to write into registers."), _("\
3921 When this permission is on, GDB may write into the target's registers.\n\
3922 Otherwise, any sort of write attempt will result in an error."),
3923 set_target_permissions
, NULL
,
3924 &setlist
, &showlist
);
3926 add_setshow_boolean_cmd ("may-write-memory", class_support
,
3927 &may_write_memory_1
, _("\
3928 Set permission to write into target memory."), _("\
3929 Show permission to write into target memory."), _("\
3930 When this permission is on, GDB may write into the target's memory.\n\
3931 Otherwise, any sort of write attempt will result in an error."),
3932 set_write_memory_permission
, NULL
,
3933 &setlist
, &showlist
);
3935 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
3936 &may_insert_breakpoints_1
, _("\
3937 Set permission to insert breakpoints in the target."), _("\
3938 Show permission to insert breakpoints in the target."), _("\
3939 When this permission is on, GDB may insert breakpoints in the program.\n\
3940 Otherwise, any sort of insertion attempt will result in an error."),
3941 set_target_permissions
, NULL
,
3942 &setlist
, &showlist
);
3944 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
3945 &may_insert_tracepoints_1
, _("\
3946 Set permission to insert tracepoints in the target."), _("\
3947 Show permission to insert tracepoints in the target."), _("\
3948 When this permission is on, GDB may insert tracepoints in the program.\n\
3949 Otherwise, any sort of insertion attempt will result in an error."),
3950 set_target_permissions
, NULL
,
3951 &setlist
, &showlist
);
3953 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
3954 &may_insert_fast_tracepoints_1
, _("\
3955 Set permission to insert fast tracepoints in the target."), _("\
3956 Show permission to insert fast tracepoints in the target."), _("\
3957 When this permission is on, GDB may insert fast tracepoints.\n\
3958 Otherwise, any sort of insertion attempt will result in an error."),
3959 set_target_permissions
, NULL
,
3960 &setlist
, &showlist
);
3962 add_setshow_boolean_cmd ("may-interrupt", class_support
,
3964 Set permission to interrupt or signal the target."), _("\
3965 Show permission to interrupt or signal the target."), _("\
3966 When this permission is on, GDB may interrupt/stop the target's execution.\n\
3967 Otherwise, any attempt to interrupt or stop will be ignored."),
3968 set_target_permissions
, NULL
,
3969 &setlist
, &showlist
);
3971 add_com ("flash-erase", no_class
, flash_erase_command
,
3972 _("Erase all flash memory regions."));
3974 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
3975 &auto_connect_native_target
, _("\
3976 Set whether GDB may automatically connect to the native target."), _("\
3977 Show whether GDB may automatically connect to the native target."), _("\
3978 When on, and GDB is not connected to a target yet, GDB\n\
3979 attempts \"run\" and other commands with the native target."),
3980 NULL
, show_auto_connect_native_target
,
3981 &setlist
, &showlist
);