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"
51 #include <unordered_map>
52 #include "target-connection.h"
55 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
57 static void default_terminal_info (struct target_ops
*, const char *, int);
59 static int default_watchpoint_addr_within_range (struct target_ops
*,
60 CORE_ADDR
, CORE_ADDR
, int);
62 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
65 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
67 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
70 static void default_mourn_inferior (struct target_ops
*self
);
72 static int default_search_memory (struct target_ops
*ops
,
74 ULONGEST search_space_len
,
75 const gdb_byte
*pattern
,
77 CORE_ADDR
*found_addrp
);
79 static int default_verify_memory (struct target_ops
*self
,
81 CORE_ADDR memaddr
, ULONGEST size
);
83 static void tcomplain (void) ATTRIBUTE_NORETURN
;
85 static struct target_ops
*find_default_run_target (const char *);
87 static int dummy_find_memory_regions (struct target_ops
*self
,
88 find_memory_region_ftype ignore1
,
91 static char *dummy_make_corefile_notes (struct target_ops
*self
,
92 bfd
*ignore1
, int *ignore2
);
94 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
96 static enum exec_direction_kind default_execution_direction
97 (struct target_ops
*self
);
99 /* Mapping between target_info objects (which have address identity)
100 and corresponding open/factory function/callback. Each add_target
101 call adds one entry to this map, and registers a "target
102 TARGET_NAME" command that when invoked calls the factory registered
103 here. The target_info object is associated with the command via
104 the command's context. */
105 static std::unordered_map
<const target_info
*, target_open_ftype
*>
108 /* The singleton debug target. */
110 static struct target_ops
*the_debug_target
;
112 /* Top of target stack. */
113 /* The target structure we are currently using to talk to a process
114 or file or whatever "inferior" we have. */
117 current_top_target ()
119 return current_inferior ()->top_target ();
122 /* Command list for target. */
124 static struct cmd_list_element
*targetlist
= NULL
;
126 /* True if we should trust readonly sections from the
127 executable when reading memory. */
129 static bool trust_readonly
= false;
131 /* Nonzero if we should show true memory content including
132 memory breakpoint inserted by gdb. */
134 static int show_memory_breakpoints
= 0;
136 /* These globals control whether GDB attempts to perform these
137 operations; they are useful for targets that need to prevent
138 inadvertent disruption, such as in non-stop mode. */
140 bool may_write_registers
= true;
142 bool may_write_memory
= true;
144 bool may_insert_breakpoints
= true;
146 bool may_insert_tracepoints
= true;
148 bool may_insert_fast_tracepoints
= true;
150 bool may_stop
= true;
152 /* Non-zero if we want to see trace of target level stuff. */
154 static unsigned int targetdebug
= 0;
157 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
160 push_target (the_debug_target
);
162 unpush_target (the_debug_target
);
166 show_targetdebug (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
173 target_has_all_memory_1 (void)
175 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
176 if (t
->has_all_memory ())
183 target_has_memory_1 (void)
185 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
186 if (t
->has_memory ())
193 target_has_stack_1 (void)
195 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
203 target_has_registers_1 (void)
205 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
206 if (t
->has_registers ())
213 target_has_execution_1 (inferior
*inf
)
215 for (target_ops
*t
= inf
->top_target ();
217 t
= inf
->find_target_beneath (t
))
218 if (t
->has_execution (inf
))
225 target_has_execution_current (void)
227 return target_has_execution_1 (current_inferior ());
230 /* This is used to implement the various target commands. */
233 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
235 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
236 target_open_ftype
*func
= target_factories
[ti
];
239 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
242 func (args
, from_tty
);
245 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
246 ti
->shortname
, args
, from_tty
);
252 add_target (const target_info
&t
, target_open_ftype
*func
,
253 completer_ftype
*completer
)
255 struct cmd_list_element
*c
;
257 auto &func_slot
= target_factories
[&t
];
258 if (func_slot
!= nullptr)
259 internal_error (__FILE__
, __LINE__
,
260 _("target already added (\"%s\")."), t
.shortname
);
263 if (targetlist
== NULL
)
264 add_basic_prefix_cmd ("target", class_run
, _("\
265 Connect to a target machine or process.\n\
266 The first argument is the type or protocol of the target machine.\n\
267 Remaining arguments are interpreted by the target protocol. For more\n\
268 information on the arguments for a particular protocol, type\n\
269 `help target ' followed by the protocol name."),
270 &targetlist
, "target ", 0, &cmdlist
);
271 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
272 set_cmd_context (c
, (void *) &t
);
273 set_cmd_sfunc (c
, open_target
);
274 if (completer
!= NULL
)
275 set_cmd_completer (c
, completer
);
281 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
283 struct cmd_list_element
*c
;
286 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
288 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
289 set_cmd_sfunc (c
, open_target
);
290 set_cmd_context (c
, (void *) &tinfo
);
291 alt
= xstrprintf ("target %s", tinfo
.shortname
);
292 deprecate_cmd (c
, alt
);
300 current_top_target ()->kill ();
304 target_load (const char *arg
, int from_tty
)
306 target_dcache_invalidate ();
307 current_top_target ()->load (arg
, from_tty
);
312 target_terminal_state
target_terminal::m_terminal_state
313 = target_terminal_state::is_ours
;
315 /* See target/target.h. */
318 target_terminal::init (void)
320 current_top_target ()->terminal_init ();
322 m_terminal_state
= target_terminal_state::is_ours
;
325 /* See target/target.h. */
328 target_terminal::inferior (void)
330 struct ui
*ui
= current_ui
;
332 /* A background resume (``run&'') should leave GDB in control of the
334 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
337 /* Since we always run the inferior in the main console (unless "set
338 inferior-tty" is in effect), when some UI other than the main one
339 calls target_terminal::inferior, then we leave the main UI's
340 terminal settings as is. */
344 /* If GDB is resuming the inferior in the foreground, install
345 inferior's terminal modes. */
347 struct inferior
*inf
= current_inferior ();
349 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
351 current_top_target ()->terminal_inferior ();
352 inf
->terminal_state
= target_terminal_state::is_inferior
;
355 m_terminal_state
= target_terminal_state::is_inferior
;
357 /* If the user hit C-c before, pretend that it was hit right
359 if (check_quit_flag ())
360 target_pass_ctrlc ();
363 /* See target/target.h. */
366 target_terminal::restore_inferior (void)
368 struct ui
*ui
= current_ui
;
370 /* See target_terminal::inferior(). */
371 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
374 /* Restore the terminal settings of inferiors that were in the
375 foreground but are now ours_for_output due to a temporary
376 target_target::ours_for_output() call. */
379 scoped_restore_current_inferior restore_inferior
;
381 for (::inferior
*inf
: all_inferiors ())
383 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
385 set_current_inferior (inf
);
386 current_top_target ()->terminal_inferior ();
387 inf
->terminal_state
= target_terminal_state::is_inferior
;
392 m_terminal_state
= target_terminal_state::is_inferior
;
394 /* If the user hit C-c before, pretend that it was hit right
396 if (check_quit_flag ())
397 target_pass_ctrlc ();
400 /* Switch terminal state to DESIRED_STATE, either is_ours, or
401 is_ours_for_output. */
404 target_terminal_is_ours_kind (target_terminal_state desired_state
)
406 scoped_restore_current_inferior restore_inferior
;
408 /* Must do this in two passes. First, have all inferiors save the
409 current terminal settings. Then, after all inferiors have add a
410 chance to safely save the terminal settings, restore GDB's
411 terminal settings. */
413 for (inferior
*inf
: all_inferiors ())
415 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
417 set_current_inferior (inf
);
418 current_top_target ()->terminal_save_inferior ();
422 for (inferior
*inf
: all_inferiors ())
424 /* Note we don't check is_inferior here like above because we
425 need to handle 'is_ours_for_output -> is_ours' too. Careful
426 to never transition from 'is_ours' to 'is_ours_for_output',
428 if (inf
->terminal_state
!= target_terminal_state::is_ours
429 && inf
->terminal_state
!= desired_state
)
431 set_current_inferior (inf
);
432 if (desired_state
== target_terminal_state::is_ours
)
433 current_top_target ()->terminal_ours ();
434 else if (desired_state
== target_terminal_state::is_ours_for_output
)
435 current_top_target ()->terminal_ours_for_output ();
437 gdb_assert_not_reached ("unhandled desired state");
438 inf
->terminal_state
= desired_state
;
443 /* See target/target.h. */
446 target_terminal::ours ()
448 struct ui
*ui
= current_ui
;
450 /* See target_terminal::inferior. */
454 if (m_terminal_state
== target_terminal_state::is_ours
)
457 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
458 m_terminal_state
= target_terminal_state::is_ours
;
461 /* See target/target.h. */
464 target_terminal::ours_for_output ()
466 struct ui
*ui
= current_ui
;
468 /* See target_terminal::inferior. */
472 if (!target_terminal::is_inferior ())
475 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
476 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
479 /* See target/target.h. */
482 target_terminal::info (const char *arg
, int from_tty
)
484 current_top_target ()->terminal_info (arg
, from_tty
);
490 target_supports_terminal_ours (void)
492 /* The current top target is the target at the top of the target
493 stack of the current inferior. While normally there's always an
494 inferior, we must check for nullptr here because we can get here
495 very early during startup, before the initial inferior is first
497 inferior
*inf
= current_inferior ();
501 return inf
->top_target ()->supports_terminal_ours ();
507 error (_("You can't do that when your target is `%s'"),
508 current_top_target ()->shortname ());
514 error (_("You can't do that without a process to debug."));
518 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
520 printf_unfiltered (_("No saved terminal information.\n"));
523 /* A default implementation for the to_get_ada_task_ptid target method.
525 This function builds the PTID by using both LWP and TID as part of
526 the PTID lwp and tid elements. The pid used is the pid of the
530 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
532 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
535 static enum exec_direction_kind
536 default_execution_direction (struct target_ops
*self
)
538 if (!target_can_execute_reverse
)
540 else if (!target_can_async_p ())
543 gdb_assert_not_reached ("\
544 to_execution_direction must be implemented for reverse async");
550 decref_target (target_ops
*t
)
553 if (t
->refcount () == 0)
555 if (t
->stratum () == process_stratum
)
556 connection_list_remove (as_process_stratum_target (t
));
564 target_stack::push (target_ops
*t
)
568 strata stratum
= t
->stratum ();
570 if (stratum
== process_stratum
)
571 connection_list_add (as_process_stratum_target (t
));
573 /* If there's already a target at this stratum, remove it. */
575 if (m_stack
[stratum
] != NULL
)
576 unpush (m_stack
[stratum
]);
578 /* Now add the new one. */
579 m_stack
[stratum
] = t
;
588 push_target (struct target_ops
*t
)
590 current_inferior ()->push_target (t
);
596 push_target (target_ops_up
&&t
)
598 current_inferior ()->push_target (t
.get ());
605 unpush_target (struct target_ops
*t
)
607 return current_inferior ()->unpush_target (t
);
613 target_stack::unpush (target_ops
*t
)
615 gdb_assert (t
!= NULL
);
617 strata stratum
= t
->stratum ();
619 if (stratum
== dummy_stratum
)
620 internal_error (__FILE__
, __LINE__
,
621 _("Attempt to unpush the dummy target"));
623 /* Look for the specified target. Note that a target can only occur
624 once in the target stack. */
626 if (m_stack
[stratum
] != t
)
628 /* If T wasn't pushed, quit. Only open targets should be
633 /* Unchain the target. */
634 m_stack
[stratum
] = NULL
;
636 if (m_top
== stratum
)
637 m_top
= t
->beneath ()->stratum ();
639 /* Finally close the target, if there are no inferiors
640 referencing this target still. Note we do this after unchaining,
641 so any target method calls from within the target_close
642 implementation don't end up in T anymore. Do leave the target
643 open if we have are other inferiors referencing this target
650 /* Unpush TARGET and assert that it worked. */
653 unpush_target_and_assert (struct target_ops
*target
)
655 if (!unpush_target (target
))
657 fprintf_unfiltered (gdb_stderr
,
658 "pop_all_targets couldn't find target %s\n",
659 target
->shortname ());
660 internal_error (__FILE__
, __LINE__
,
661 _("failed internal consistency check"));
666 pop_all_targets_above (enum strata above_stratum
)
668 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
669 unpush_target_and_assert (current_top_target ());
675 pop_all_targets_at_and_above (enum strata stratum
)
677 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
678 unpush_target_and_assert (current_top_target ());
682 pop_all_targets (void)
684 pop_all_targets_above (dummy_stratum
);
687 /* Return true if T is now pushed in the current inferior's target
688 stack. Return false otherwise. */
691 target_is_pushed (target_ops
*t
)
693 return current_inferior ()->target_is_pushed (t
);
696 /* Default implementation of to_get_thread_local_address. */
699 generic_tls_error (void)
701 throw_error (TLS_GENERIC_ERROR
,
702 _("Cannot find thread-local variables on this target"));
705 /* Using the objfile specified in OBJFILE, find the address for the
706 current thread's thread-local storage with offset OFFSET. */
708 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
710 volatile CORE_ADDR addr
= 0;
711 struct target_ops
*target
= current_top_target ();
712 struct gdbarch
*gdbarch
= target_gdbarch ();
714 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
716 ptid_t ptid
= inferior_ptid
;
722 /* Fetch the load module address for this objfile. */
723 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
726 if (gdbarch_get_thread_local_address_p (gdbarch
))
727 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
730 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
732 /* If an error occurred, print TLS related messages here. Otherwise,
733 throw the error to some higher catcher. */
734 catch (const gdb_exception
&ex
)
736 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
740 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
741 error (_("Cannot find thread-local variables "
742 "in this thread library."));
744 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
745 if (objfile_is_library
)
746 error (_("Cannot find shared library `%s' in dynamic"
747 " linker's load module list"), objfile_name (objfile
));
749 error (_("Cannot find executable file `%s' in dynamic"
750 " linker's load module list"), objfile_name (objfile
));
752 case TLS_NOT_ALLOCATED_YET_ERROR
:
753 if (objfile_is_library
)
754 error (_("The inferior has not yet allocated storage for"
755 " thread-local variables in\n"
756 "the shared library `%s'\n"
758 objfile_name (objfile
),
759 target_pid_to_str (ptid
).c_str ());
761 error (_("The inferior has not yet allocated storage for"
762 " thread-local variables in\n"
763 "the executable `%s'\n"
765 objfile_name (objfile
),
766 target_pid_to_str (ptid
).c_str ());
768 case TLS_GENERIC_ERROR
:
769 if (objfile_is_library
)
770 error (_("Cannot find thread-local storage for %s, "
771 "shared library %s:\n%s"),
772 target_pid_to_str (ptid
).c_str (),
773 objfile_name (objfile
), ex
.what ());
775 error (_("Cannot find thread-local storage for %s, "
776 "executable file %s:\n%s"),
777 target_pid_to_str (ptid
).c_str (),
778 objfile_name (objfile
), ex
.what ());
787 error (_("Cannot find thread-local variables on this target"));
793 target_xfer_status_to_string (enum target_xfer_status status
)
795 #define CASE(X) case X: return #X
798 CASE(TARGET_XFER_E_IO
);
799 CASE(TARGET_XFER_UNAVAILABLE
);
809 gdb::unique_xmalloc_ptr
<char>
810 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
812 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
815 if (bytes_read
== nullptr)
816 bytes_read
= &ignore
;
818 /* Note that the endian-ness does not matter here. */
819 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
820 &buffer
, bytes_read
);
824 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
827 struct target_section_table
*
828 target_get_section_table (struct target_ops
*target
)
830 return target
->get_section_table ();
833 /* Find a section containing ADDR. */
835 struct target_section
*
836 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
838 struct target_section_table
*table
= target_get_section_table (target
);
839 struct target_section
*secp
;
844 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
846 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
853 /* Helper for the memory xfer routines. Checks the attributes of the
854 memory region of MEMADDR against the read or write being attempted.
855 If the access is permitted returns true, otherwise returns false.
856 REGION_P is an optional output parameter. If not-NULL, it is
857 filled with a pointer to the memory region of MEMADDR. REG_LEN
858 returns LEN trimmed to the end of the region. This is how much the
859 caller can continue requesting, if the access is permitted. A
860 single xfer request must not straddle memory region boundaries. */
863 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
864 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
865 struct mem_region
**region_p
)
867 struct mem_region
*region
;
869 region
= lookup_mem_region (memaddr
);
871 if (region_p
!= NULL
)
874 switch (region
->attrib
.mode
)
877 if (writebuf
!= NULL
)
887 /* We only support writing to flash during "load" for now. */
888 if (writebuf
!= NULL
)
889 error (_("Writing to flash memory forbidden in this context"));
896 /* region->hi == 0 means there's no upper bound. */
897 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
900 *reg_len
= region
->hi
- memaddr
;
905 /* Read memory from more than one valid target. A core file, for
906 instance, could have some of memory but delegate other bits to
907 the target below it. So, we must manually try all targets. */
909 enum target_xfer_status
910 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
911 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
912 ULONGEST
*xfered_len
)
914 enum target_xfer_status res
;
918 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
919 readbuf
, writebuf
, memaddr
, len
,
921 if (res
== TARGET_XFER_OK
)
924 /* Stop if the target reports that the memory is not available. */
925 if (res
== TARGET_XFER_UNAVAILABLE
)
928 /* Don't continue past targets which have all the memory.
929 At one time, this code was necessary to read data from
930 executables / shared libraries when data for the requested
931 addresses weren't available in the core file. But now the
932 core target handles this case itself. */
933 if (ops
->has_all_memory ())
936 ops
= ops
->beneath ();
940 /* The cache works at the raw memory level. Make sure the cache
941 gets updated with raw contents no matter what kind of memory
942 object was originally being written. Note we do write-through
943 first, so that if it fails, we don't write to the cache contents
944 that never made it to the target. */
946 && inferior_ptid
!= null_ptid
947 && target_dcache_init_p ()
948 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
950 DCACHE
*dcache
= target_dcache_get ();
952 /* Note that writing to an area of memory which wasn't present
953 in the cache doesn't cause it to be loaded in. */
954 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
960 /* Perform a partial memory transfer.
961 For docs see target.h, to_xfer_partial. */
963 static enum target_xfer_status
964 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
965 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
966 ULONGEST len
, ULONGEST
*xfered_len
)
968 enum target_xfer_status res
;
970 struct mem_region
*region
;
971 struct inferior
*inf
;
973 /* For accesses to unmapped overlay sections, read directly from
974 files. Must do this first, as MEMADDR may need adjustment. */
975 if (readbuf
!= NULL
&& overlay_debugging
)
977 struct obj_section
*section
= find_pc_overlay (memaddr
);
979 if (pc_in_unmapped_range (memaddr
, section
))
981 struct target_section_table
*table
982 = target_get_section_table (ops
);
983 const char *section_name
= section
->the_bfd_section
->name
;
985 memaddr
= overlay_mapped_address (memaddr
, section
);
987 auto match_cb
= [=] (const struct target_section
*s
)
989 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
992 return section_table_xfer_memory_partial (readbuf
, writebuf
,
993 memaddr
, len
, xfered_len
,
1000 /* Try the executable files, if "trust-readonly-sections" is set. */
1001 if (readbuf
!= NULL
&& trust_readonly
)
1003 struct target_section
*secp
;
1004 struct target_section_table
*table
;
1006 secp
= target_section_by_addr (ops
, memaddr
);
1008 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1010 table
= target_get_section_table (ops
);
1011 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1012 memaddr
, len
, xfered_len
,
1014 table
->sections_end
);
1018 /* Try GDB's internal data cache. */
1020 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1022 return TARGET_XFER_E_IO
;
1024 if (inferior_ptid
!= null_ptid
)
1025 inf
= current_inferior ();
1031 /* The dcache reads whole cache lines; that doesn't play well
1032 with reading from a trace buffer, because reading outside of
1033 the collected memory range fails. */
1034 && get_traceframe_number () == -1
1035 && (region
->attrib
.cache
1036 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1037 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1039 DCACHE
*dcache
= target_dcache_get_or_init ();
1041 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1042 reg_len
, xfered_len
);
1045 /* If none of those methods found the memory we wanted, fall back
1046 to a target partial transfer. Normally a single call to
1047 to_xfer_partial is enough; if it doesn't recognize an object
1048 it will call the to_xfer_partial of the next target down.
1049 But for memory this won't do. Memory is the only target
1050 object which can be read from more than one valid target.
1051 A core file, for instance, could have some of memory but
1052 delegate other bits to the target below it. So, we must
1053 manually try all targets. */
1055 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1058 /* If we still haven't got anything, return the last error. We
1063 /* Perform a partial memory transfer. For docs see target.h,
1066 static enum target_xfer_status
1067 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1068 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1069 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1071 enum target_xfer_status res
;
1073 /* Zero length requests are ok and require no work. */
1075 return TARGET_XFER_EOF
;
1077 memaddr
= address_significant (target_gdbarch (), memaddr
);
1079 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1080 breakpoint insns, thus hiding out from higher layers whether
1081 there are software breakpoints inserted in the code stream. */
1082 if (readbuf
!= NULL
)
1084 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1087 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1088 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1092 /* A large write request is likely to be partially satisfied
1093 by memory_xfer_partial_1. We will continually malloc
1094 and free a copy of the entire write request for breakpoint
1095 shadow handling even though we only end up writing a small
1096 subset of it. Cap writes to a limit specified by the target
1097 to mitigate this. */
1098 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1100 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1101 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1102 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1109 scoped_restore_tmpl
<int>
1110 make_scoped_restore_show_memory_breakpoints (int show
)
1112 return make_scoped_restore (&show_memory_breakpoints
, show
);
1115 /* For docs see target.h, to_xfer_partial. */
1117 enum target_xfer_status
1118 target_xfer_partial (struct target_ops
*ops
,
1119 enum target_object object
, const char *annex
,
1120 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1121 ULONGEST offset
, ULONGEST len
,
1122 ULONGEST
*xfered_len
)
1124 enum target_xfer_status retval
;
1126 /* Transfer is done when LEN is zero. */
1128 return TARGET_XFER_EOF
;
1130 if (writebuf
&& !may_write_memory
)
1131 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1132 core_addr_to_string_nz (offset
), plongest (len
));
1136 /* If this is a memory transfer, let the memory-specific code
1137 have a look at it instead. Memory transfers are more
1139 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1140 || object
== TARGET_OBJECT_CODE_MEMORY
)
1141 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1142 writebuf
, offset
, len
, xfered_len
);
1143 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1145 /* Skip/avoid accessing the target if the memory region
1146 attributes block the access. Check this here instead of in
1147 raw_memory_xfer_partial as otherwise we'd end up checking
1148 this twice in the case of the memory_xfer_partial path is
1149 taken; once before checking the dcache, and another in the
1150 tail call to raw_memory_xfer_partial. */
1151 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1153 return TARGET_XFER_E_IO
;
1155 /* Request the normal memory object from other layers. */
1156 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1160 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1161 writebuf
, offset
, len
, xfered_len
);
1165 const unsigned char *myaddr
= NULL
;
1167 fprintf_unfiltered (gdb_stdlog
,
1168 "%s:target_xfer_partial "
1169 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1172 (annex
? annex
: "(null)"),
1173 host_address_to_string (readbuf
),
1174 host_address_to_string (writebuf
),
1175 core_addr_to_string_nz (offset
),
1176 pulongest (len
), retval
,
1177 pulongest (*xfered_len
));
1183 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1187 fputs_unfiltered (", bytes =", gdb_stdlog
);
1188 for (i
= 0; i
< *xfered_len
; i
++)
1190 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1192 if (targetdebug
< 2 && i
> 0)
1194 fprintf_unfiltered (gdb_stdlog
, " ...");
1197 fprintf_unfiltered (gdb_stdlog
, "\n");
1200 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1204 fputc_unfiltered ('\n', gdb_stdlog
);
1207 /* Check implementations of to_xfer_partial update *XFERED_LEN
1208 properly. Do assertion after printing debug messages, so that we
1209 can find more clues on assertion failure from debugging messages. */
1210 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1211 gdb_assert (*xfered_len
> 0);
1216 /* Read LEN bytes of target memory at address MEMADDR, placing the
1217 results in GDB's memory at MYADDR. Returns either 0 for success or
1218 -1 if any error occurs.
1220 If an error occurs, no guarantee is made about the contents of the data at
1221 MYADDR. In particular, the caller should not depend upon partial reads
1222 filling the buffer with good data. There is no way for the caller to know
1223 how much good data might have been transfered anyway. Callers that can
1224 deal with partial reads should call target_read (which will retry until
1225 it makes no progress, and then return how much was transferred). */
1228 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1230 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1231 myaddr
, memaddr
, len
) == len
)
1237 /* See target/target.h. */
1240 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1245 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1248 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1249 gdbarch_byte_order (target_gdbarch ()));
1253 /* Like target_read_memory, but specify explicitly that this is a read
1254 from the target's raw memory. That is, this read bypasses the
1255 dcache, breakpoint shadowing, etc. */
1258 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1260 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1261 myaddr
, memaddr
, len
) == len
)
1267 /* Like target_read_memory, but specify explicitly that this is a read from
1268 the target's stack. This may trigger different cache behavior. */
1271 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1273 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1274 myaddr
, memaddr
, len
) == len
)
1280 /* Like target_read_memory, but specify explicitly that this is a read from
1281 the target's code. This may trigger different cache behavior. */
1284 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1286 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1287 myaddr
, memaddr
, len
) == len
)
1293 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1294 Returns either 0 for success or -1 if any error occurs. If an
1295 error occurs, no guarantee is made about how much data got written.
1296 Callers that can deal with partial writes should call
1300 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1302 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1303 myaddr
, memaddr
, len
) == len
)
1309 /* Write LEN bytes from MYADDR to target raw memory at address
1310 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1311 If an error occurs, no guarantee is made about how much data got
1312 written. Callers that can deal with partial writes should call
1316 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1318 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1319 myaddr
, memaddr
, len
) == len
)
1325 /* Fetch the target's memory map. */
1327 std::vector
<mem_region
>
1328 target_memory_map (void)
1330 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1331 if (result
.empty ())
1334 std::sort (result
.begin (), result
.end ());
1336 /* Check that regions do not overlap. Simultaneously assign
1337 a numbering for the "mem" commands to use to refer to
1339 mem_region
*last_one
= NULL
;
1340 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1342 mem_region
*this_one
= &result
[ix
];
1343 this_one
->number
= ix
;
1345 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1347 warning (_("Overlapping regions in memory map: ignoring"));
1348 return std::vector
<mem_region
> ();
1351 last_one
= this_one
;
1358 target_flash_erase (ULONGEST address
, LONGEST length
)
1360 current_top_target ()->flash_erase (address
, length
);
1364 target_flash_done (void)
1366 current_top_target ()->flash_done ();
1370 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1371 struct cmd_list_element
*c
, const char *value
)
1373 fprintf_filtered (file
,
1374 _("Mode for reading from readonly sections is %s.\n"),
1378 /* Target vector read/write partial wrapper functions. */
1380 static enum target_xfer_status
1381 target_read_partial (struct target_ops
*ops
,
1382 enum target_object object
,
1383 const char *annex
, gdb_byte
*buf
,
1384 ULONGEST offset
, ULONGEST len
,
1385 ULONGEST
*xfered_len
)
1387 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1391 static enum target_xfer_status
1392 target_write_partial (struct target_ops
*ops
,
1393 enum target_object object
,
1394 const char *annex
, const gdb_byte
*buf
,
1395 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1397 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1401 /* Wrappers to perform the full transfer. */
1403 /* For docs on target_read see target.h. */
1406 target_read (struct target_ops
*ops
,
1407 enum target_object object
,
1408 const char *annex
, gdb_byte
*buf
,
1409 ULONGEST offset
, LONGEST len
)
1411 LONGEST xfered_total
= 0;
1414 /* If we are reading from a memory object, find the length of an addressable
1415 unit for that architecture. */
1416 if (object
== TARGET_OBJECT_MEMORY
1417 || object
== TARGET_OBJECT_STACK_MEMORY
1418 || object
== TARGET_OBJECT_CODE_MEMORY
1419 || object
== TARGET_OBJECT_RAW_MEMORY
)
1420 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1422 while (xfered_total
< len
)
1424 ULONGEST xfered_partial
;
1425 enum target_xfer_status status
;
1427 status
= target_read_partial (ops
, object
, annex
,
1428 buf
+ xfered_total
* unit_size
,
1429 offset
+ xfered_total
, len
- xfered_total
,
1432 /* Call an observer, notifying them of the xfer progress? */
1433 if (status
== TARGET_XFER_EOF
)
1434 return xfered_total
;
1435 else if (status
== TARGET_XFER_OK
)
1437 xfered_total
+= xfered_partial
;
1441 return TARGET_XFER_E_IO
;
1447 /* Assuming that the entire [begin, end) range of memory cannot be
1448 read, try to read whatever subrange is possible to read.
1450 The function returns, in RESULT, either zero or one memory block.
1451 If there's a readable subrange at the beginning, it is completely
1452 read and returned. Any further readable subrange will not be read.
1453 Otherwise, if there's a readable subrange at the end, it will be
1454 completely read and returned. Any readable subranges before it
1455 (obviously, not starting at the beginning), will be ignored. In
1456 other cases -- either no readable subrange, or readable subrange(s)
1457 that is neither at the beginning, or end, nothing is returned.
1459 The purpose of this function is to handle a read across a boundary
1460 of accessible memory in a case when memory map is not available.
1461 The above restrictions are fine for this case, but will give
1462 incorrect results if the memory is 'patchy'. However, supporting
1463 'patchy' memory would require trying to read every single byte,
1464 and it seems unacceptable solution. Explicit memory map is
1465 recommended for this case -- and target_read_memory_robust will
1466 take care of reading multiple ranges then. */
1469 read_whatever_is_readable (struct target_ops
*ops
,
1470 const ULONGEST begin
, const ULONGEST end
,
1472 std::vector
<memory_read_result
> *result
)
1474 ULONGEST current_begin
= begin
;
1475 ULONGEST current_end
= end
;
1477 ULONGEST xfered_len
;
1479 /* If we previously failed to read 1 byte, nothing can be done here. */
1480 if (end
- begin
<= 1)
1483 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1485 /* Check that either first or the last byte is readable, and give up
1486 if not. This heuristic is meant to permit reading accessible memory
1487 at the boundary of accessible region. */
1488 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1489 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1494 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1495 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1496 &xfered_len
) == TARGET_XFER_OK
)
1504 /* Loop invariant is that the [current_begin, current_end) was previously
1505 found to be not readable as a whole.
1507 Note loop condition -- if the range has 1 byte, we can't divide the range
1508 so there's no point trying further. */
1509 while (current_end
- current_begin
> 1)
1511 ULONGEST first_half_begin
, first_half_end
;
1512 ULONGEST second_half_begin
, second_half_end
;
1514 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1518 first_half_begin
= current_begin
;
1519 first_half_end
= middle
;
1520 second_half_begin
= middle
;
1521 second_half_end
= current_end
;
1525 first_half_begin
= middle
;
1526 first_half_end
= current_end
;
1527 second_half_begin
= current_begin
;
1528 second_half_end
= middle
;
1531 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1532 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1534 first_half_end
- first_half_begin
);
1536 if (xfer
== first_half_end
- first_half_begin
)
1538 /* This half reads up fine. So, the error must be in the
1540 current_begin
= second_half_begin
;
1541 current_end
= second_half_end
;
1545 /* This half is not readable. Because we've tried one byte, we
1546 know some part of this half if actually readable. Go to the next
1547 iteration to divide again and try to read.
1549 We don't handle the other half, because this function only tries
1550 to read a single readable subrange. */
1551 current_begin
= first_half_begin
;
1552 current_end
= first_half_end
;
1558 /* The [begin, current_begin) range has been read. */
1559 result
->emplace_back (begin
, current_end
, std::move (buf
));
1563 /* The [current_end, end) range has been read. */
1564 LONGEST region_len
= end
- current_end
;
1566 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1567 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1568 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1569 region_len
* unit_size
);
1570 result
->emplace_back (current_end
, end
, std::move (data
));
1574 std::vector
<memory_read_result
>
1575 read_memory_robust (struct target_ops
*ops
,
1576 const ULONGEST offset
, const LONGEST len
)
1578 std::vector
<memory_read_result
> result
;
1579 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1581 LONGEST xfered_total
= 0;
1582 while (xfered_total
< len
)
1584 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1587 /* If there is no explicit region, a fake one should be created. */
1588 gdb_assert (region
);
1590 if (region
->hi
== 0)
1591 region_len
= len
- xfered_total
;
1593 region_len
= region
->hi
- offset
;
1595 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1597 /* Cannot read this region. Note that we can end up here only
1598 if the region is explicitly marked inaccessible, or
1599 'inaccessible-by-default' is in effect. */
1600 xfered_total
+= region_len
;
1604 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1605 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1606 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1608 LONGEST xfered_partial
=
1609 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1610 offset
+ xfered_total
, to_read
);
1611 /* Call an observer, notifying them of the xfer progress? */
1612 if (xfered_partial
<= 0)
1614 /* Got an error reading full chunk. See if maybe we can read
1616 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1617 offset
+ xfered_total
+ to_read
,
1618 unit_size
, &result
);
1619 xfered_total
+= to_read
;
1623 result
.emplace_back (offset
+ xfered_total
,
1624 offset
+ xfered_total
+ xfered_partial
,
1625 std::move (buffer
));
1626 xfered_total
+= xfered_partial
;
1636 /* An alternative to target_write with progress callbacks. */
1639 target_write_with_progress (struct target_ops
*ops
,
1640 enum target_object object
,
1641 const char *annex
, const gdb_byte
*buf
,
1642 ULONGEST offset
, LONGEST len
,
1643 void (*progress
) (ULONGEST
, void *), void *baton
)
1645 LONGEST xfered_total
= 0;
1648 /* If we are writing to a memory object, find the length of an addressable
1649 unit for that architecture. */
1650 if (object
== TARGET_OBJECT_MEMORY
1651 || object
== TARGET_OBJECT_STACK_MEMORY
1652 || object
== TARGET_OBJECT_CODE_MEMORY
1653 || object
== TARGET_OBJECT_RAW_MEMORY
)
1654 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1656 /* Give the progress callback a chance to set up. */
1658 (*progress
) (0, baton
);
1660 while (xfered_total
< len
)
1662 ULONGEST xfered_partial
;
1663 enum target_xfer_status status
;
1665 status
= target_write_partial (ops
, object
, annex
,
1666 buf
+ xfered_total
* unit_size
,
1667 offset
+ xfered_total
, len
- xfered_total
,
1670 if (status
!= TARGET_XFER_OK
)
1671 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1674 (*progress
) (xfered_partial
, baton
);
1676 xfered_total
+= xfered_partial
;
1682 /* For docs on target_write see target.h. */
1685 target_write (struct target_ops
*ops
,
1686 enum target_object object
,
1687 const char *annex
, const gdb_byte
*buf
,
1688 ULONGEST offset
, LONGEST len
)
1690 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1694 /* Help for target_read_alloc and target_read_stralloc. See their comments
1697 template <typename T
>
1698 gdb::optional
<gdb::def_vector
<T
>>
1699 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1702 gdb::def_vector
<T
> buf
;
1704 const int chunk
= 4096;
1706 /* This function does not have a length parameter; it reads the
1707 entire OBJECT). Also, it doesn't support objects fetched partly
1708 from one target and partly from another (in a different stratum,
1709 e.g. a core file and an executable). Both reasons make it
1710 unsuitable for reading memory. */
1711 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1713 /* Start by reading up to 4K at a time. The target will throttle
1714 this number down if necessary. */
1717 ULONGEST xfered_len
;
1718 enum target_xfer_status status
;
1720 buf
.resize (buf_pos
+ chunk
);
1722 status
= target_read_partial (ops
, object
, annex
,
1723 (gdb_byte
*) &buf
[buf_pos
],
1727 if (status
== TARGET_XFER_EOF
)
1729 /* Read all there was. */
1730 buf
.resize (buf_pos
);
1733 else if (status
!= TARGET_XFER_OK
)
1735 /* An error occurred. */
1739 buf_pos
+= xfered_len
;
1747 gdb::optional
<gdb::byte_vector
>
1748 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1751 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1756 gdb::optional
<gdb::char_vector
>
1757 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1760 gdb::optional
<gdb::char_vector
> buf
1761 = target_read_alloc_1
<char> (ops
, object
, annex
);
1766 if (buf
->empty () || buf
->back () != '\0')
1767 buf
->push_back ('\0');
1769 /* Check for embedded NUL bytes; but allow trailing NULs. */
1770 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1771 it
!= buf
->end (); it
++)
1774 warning (_("target object %d, annex %s, "
1775 "contained unexpected null characters"),
1776 (int) object
, annex
? annex
: "(none)");
1783 /* Memory transfer methods. */
1786 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1789 /* This method is used to read from an alternate, non-current
1790 target. This read must bypass the overlay support (as symbols
1791 don't match this target), and GDB's internal cache (wrong cache
1792 for this target). */
1793 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1795 memory_error (TARGET_XFER_E_IO
, addr
);
1799 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1800 int len
, enum bfd_endian byte_order
)
1802 gdb_byte buf
[sizeof (ULONGEST
)];
1804 gdb_assert (len
<= sizeof (buf
));
1805 get_target_memory (ops
, addr
, buf
, len
);
1806 return extract_unsigned_integer (buf
, len
, byte_order
);
1812 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1813 struct bp_target_info
*bp_tgt
)
1815 if (!may_insert_breakpoints
)
1817 warning (_("May not insert breakpoints"));
1821 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1827 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1828 struct bp_target_info
*bp_tgt
,
1829 enum remove_bp_reason reason
)
1831 /* This is kind of a weird case to handle, but the permission might
1832 have been changed after breakpoints were inserted - in which case
1833 we should just take the user literally and assume that any
1834 breakpoints should be left in place. */
1835 if (!may_insert_breakpoints
)
1837 warning (_("May not remove breakpoints"));
1841 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1845 info_target_command (const char *args
, int from_tty
)
1847 int has_all_mem
= 0;
1849 if (symfile_objfile
!= NULL
)
1850 printf_unfiltered (_("Symbols from \"%s\".\n"),
1851 objfile_name (symfile_objfile
));
1853 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1855 if (!t
->has_memory ())
1858 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1861 printf_unfiltered (_("\tWhile running this, "
1862 "GDB does not access memory from...\n"));
1863 printf_unfiltered ("%s:\n", t
->longname ());
1865 has_all_mem
= t
->has_all_memory ();
1869 /* This function is called before any new inferior is created, e.g.
1870 by running a program, attaching, or connecting to a target.
1871 It cleans up any state from previous invocations which might
1872 change between runs. This is a subset of what target_preopen
1873 resets (things which might change between targets). */
1876 target_pre_inferior (int from_tty
)
1878 /* Clear out solib state. Otherwise the solib state of the previous
1879 inferior might have survived and is entirely wrong for the new
1880 target. This has been observed on GNU/Linux using glibc 2.3. How
1892 Cannot access memory at address 0xdeadbeef
1895 /* In some OSs, the shared library list is the same/global/shared
1896 across inferiors. If code is shared between processes, so are
1897 memory regions and features. */
1898 if (!gdbarch_has_global_solist (target_gdbarch ()))
1900 no_shared_libraries (NULL
, from_tty
);
1902 invalidate_target_mem_regions ();
1904 target_clear_description ();
1907 /* attach_flag may be set if the previous process associated with
1908 the inferior was attached to. */
1909 current_inferior ()->attach_flag
= 0;
1911 current_inferior ()->highest_thread_num
= 0;
1913 agent_capability_invalidate ();
1916 /* This is to be called by the open routine before it does
1920 target_preopen (int from_tty
)
1924 if (current_inferior ()->pid
!= 0)
1927 || !target_has_execution
1928 || query (_("A program is being debugged already. Kill it? ")))
1930 /* Core inferiors actually should be detached, not
1932 if (target_has_execution
)
1935 target_detach (current_inferior (), 0);
1938 error (_("Program not killed."));
1941 /* Calling target_kill may remove the target from the stack. But if
1942 it doesn't (which seems like a win for UDI), remove it now. */
1943 /* Leave the exec target, though. The user may be switching from a
1944 live process to a core of the same program. */
1945 pop_all_targets_above (file_stratum
);
1947 target_pre_inferior (from_tty
);
1953 target_detach (inferior
*inf
, int from_tty
)
1955 /* After we have detached, we will clear the register cache for this inferior
1956 by calling registers_changed_ptid. We must save the pid_ptid before
1957 detaching, as the target detach method will clear inf->pid. */
1958 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
1960 /* As long as some to_detach implementations rely on the current_inferior
1961 (either directly, or indirectly, like through target_gdbarch or by
1962 reading memory), INF needs to be the current inferior. When that
1963 requirement will become no longer true, then we can remove this
1965 gdb_assert (inf
== current_inferior ());
1967 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
1968 /* Don't remove global breakpoints here. They're removed on
1969 disconnection from the target. */
1972 /* If we're in breakpoints-always-inserted mode, have to remove
1973 breakpoints before detaching. */
1974 remove_breakpoints_inf (current_inferior ());
1976 prepare_for_detach ();
1978 /* Hold a strong reference because detaching may unpush the
1980 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
1982 current_top_target ()->detach (inf
, from_tty
);
1984 process_stratum_target
*proc_target
1985 = as_process_stratum_target (proc_target_ref
.get ());
1987 registers_changed_ptid (proc_target
, save_pid_ptid
);
1989 /* We have to ensure we have no frame cache left. Normally,
1990 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
1991 inferior_ptid matches save_pid_ptid, but in our case, it does not
1992 call it, as inferior_ptid has been reset. */
1993 reinit_frame_cache ();
1997 target_disconnect (const char *args
, int from_tty
)
1999 /* If we're in breakpoints-always-inserted mode or if breakpoints
2000 are global across processes, we have to remove them before
2002 remove_breakpoints ();
2004 current_top_target ()->disconnect (args
, from_tty
);
2007 /* See target/target.h. */
2010 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2012 return current_top_target ()->wait (ptid
, status
, options
);
2018 default_target_wait (struct target_ops
*ops
,
2019 ptid_t ptid
, struct target_waitstatus
*status
,
2022 status
->kind
= TARGET_WAITKIND_IGNORE
;
2023 return minus_one_ptid
;
2027 target_pid_to_str (ptid_t ptid
)
2029 return current_top_target ()->pid_to_str (ptid
);
2033 target_thread_name (struct thread_info
*info
)
2035 gdb_assert (info
->inf
== current_inferior ());
2037 return current_top_target ()->thread_name (info
);
2040 struct thread_info
*
2041 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2043 struct inferior
*inf
)
2045 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2052 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2054 return current_top_target ()->thread_info_to_thread_handle (tip
);
2058 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2060 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2062 target_dcache_invalidate ();
2064 current_top_target ()->resume (ptid
, step
, signal
);
2066 registers_changed_ptid (curr_target
, ptid
);
2067 /* We only set the internal executing state here. The user/frontend
2068 running state is set at a higher level. This also clears the
2069 thread's stop_pc as side effect. */
2070 set_executing (curr_target
, ptid
, true);
2071 clear_inline_frame_state (curr_target
, ptid
);
2074 /* If true, target_commit_resume is a nop. */
2075 static int defer_target_commit_resume
;
2080 target_commit_resume (void)
2082 if (defer_target_commit_resume
)
2085 current_top_target ()->commit_resume ();
2090 scoped_restore_tmpl
<int>
2091 make_scoped_defer_target_commit_resume ()
2093 return make_scoped_restore (&defer_target_commit_resume
, 1);
2097 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2099 current_top_target ()->pass_signals (pass_signals
);
2103 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2105 current_top_target ()->program_signals (program_signals
);
2109 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2112 /* Some target returned a fork event, but did not know how to follow it. */
2113 internal_error (__FILE__
, __LINE__
,
2114 _("could not find a target to follow fork"));
2117 /* Look through the list of possible targets for a target that can
2121 target_follow_fork (bool follow_child
, bool detach_fork
)
2123 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2126 /* Target wrapper for follow exec hook. */
2129 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2131 current_top_target ()->follow_exec (inf
, execd_pathname
);
2135 default_mourn_inferior (struct target_ops
*self
)
2137 internal_error (__FILE__
, __LINE__
,
2138 _("could not find a target to follow mourn inferior"));
2142 target_mourn_inferior (ptid_t ptid
)
2144 gdb_assert (ptid
== inferior_ptid
);
2145 current_top_target ()->mourn_inferior ();
2147 /* We no longer need to keep handles on any of the object files.
2148 Make sure to release them to avoid unnecessarily locking any
2149 of them while we're not actually debugging. */
2150 bfd_cache_close_all ();
2153 /* Look for a target which can describe architectural features, starting
2154 from TARGET. If we find one, return its description. */
2156 const struct target_desc
*
2157 target_read_description (struct target_ops
*target
)
2159 return target
->read_description ();
2162 /* This implements a basic search of memory, reading target memory and
2163 performing the search here (as opposed to performing the search in on the
2164 target side with, for example, gdbserver). */
2167 simple_search_memory (struct target_ops
*ops
,
2168 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2169 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2170 CORE_ADDR
*found_addrp
)
2172 /* NOTE: also defined in find.c testcase. */
2173 #define SEARCH_CHUNK_SIZE 16000
2174 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2175 /* Buffer to hold memory contents for searching. */
2176 unsigned search_buf_size
;
2178 search_buf_size
= chunk_size
+ pattern_len
- 1;
2180 /* No point in trying to allocate a buffer larger than the search space. */
2181 if (search_space_len
< search_buf_size
)
2182 search_buf_size
= search_space_len
;
2184 gdb::byte_vector
search_buf (search_buf_size
);
2186 /* Prime the search buffer. */
2188 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2189 search_buf
.data (), start_addr
, search_buf_size
)
2192 warning (_("Unable to access %s bytes of target "
2193 "memory at %s, halting search."),
2194 pulongest (search_buf_size
), hex_string (start_addr
));
2198 /* Perform the search.
2200 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2201 When we've scanned N bytes we copy the trailing bytes to the start and
2202 read in another N bytes. */
2204 while (search_space_len
>= pattern_len
)
2206 gdb_byte
*found_ptr
;
2207 unsigned nr_search_bytes
2208 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2210 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2211 pattern
, pattern_len
);
2213 if (found_ptr
!= NULL
)
2215 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2217 *found_addrp
= found_addr
;
2221 /* Not found in this chunk, skip to next chunk. */
2223 /* Don't let search_space_len wrap here, it's unsigned. */
2224 if (search_space_len
>= chunk_size
)
2225 search_space_len
-= chunk_size
;
2227 search_space_len
= 0;
2229 if (search_space_len
>= pattern_len
)
2231 unsigned keep_len
= search_buf_size
- chunk_size
;
2232 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2235 /* Copy the trailing part of the previous iteration to the front
2236 of the buffer for the next iteration. */
2237 gdb_assert (keep_len
== pattern_len
- 1);
2238 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2240 nr_to_read
= std::min (search_space_len
- keep_len
,
2241 (ULONGEST
) chunk_size
);
2243 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2244 &search_buf
[keep_len
], read_addr
,
2245 nr_to_read
) != nr_to_read
)
2247 warning (_("Unable to access %s bytes of target "
2248 "memory at %s, halting search."),
2249 plongest (nr_to_read
),
2250 hex_string (read_addr
));
2254 start_addr
+= chunk_size
;
2263 /* Default implementation of memory-searching. */
2266 default_search_memory (struct target_ops
*self
,
2267 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2268 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2269 CORE_ADDR
*found_addrp
)
2271 /* Start over from the top of the target stack. */
2272 return simple_search_memory (current_top_target (),
2273 start_addr
, search_space_len
,
2274 pattern
, pattern_len
, found_addrp
);
2277 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2278 sequence of bytes in PATTERN with length PATTERN_LEN.
2280 The result is 1 if found, 0 if not found, and -1 if there was an error
2281 requiring halting of the search (e.g. memory read error).
2282 If the pattern is found the address is recorded in FOUND_ADDRP. */
2285 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2286 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2287 CORE_ADDR
*found_addrp
)
2289 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2290 pattern
, pattern_len
, found_addrp
);
2293 /* Look through the currently pushed targets. If none of them will
2294 be able to restart the currently running process, issue an error
2298 target_require_runnable (void)
2300 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2302 /* If this target knows how to create a new program, then
2303 assume we will still be able to after killing the current
2304 one. Either killing and mourning will not pop T, or else
2305 find_default_run_target will find it again. */
2306 if (t
->can_create_inferior ())
2309 /* Do not worry about targets at certain strata that can not
2310 create inferiors. Assume they will be pushed again if
2311 necessary, and continue to the process_stratum. */
2312 if (t
->stratum () > process_stratum
)
2315 error (_("The \"%s\" target does not support \"run\". "
2316 "Try \"help target\" or \"continue\"."),
2320 /* This function is only called if the target is running. In that
2321 case there should have been a process_stratum target and it
2322 should either know how to create inferiors, or not... */
2323 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2326 /* Whether GDB is allowed to fall back to the default run target for
2327 "run", "attach", etc. when no target is connected yet. */
2328 static bool auto_connect_native_target
= true;
2331 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2332 struct cmd_list_element
*c
, const char *value
)
2334 fprintf_filtered (file
,
2335 _("Whether GDB may automatically connect to the "
2336 "native target is %s.\n"),
2340 /* A pointer to the target that can respond to "run" or "attach".
2341 Native targets are always singletons and instantiated early at GDB
2343 static target_ops
*the_native_target
;
2348 set_native_target (target_ops
*target
)
2350 if (the_native_target
!= NULL
)
2351 internal_error (__FILE__
, __LINE__
,
2352 _("native target already set (\"%s\")."),
2353 the_native_target
->longname ());
2355 the_native_target
= target
;
2361 get_native_target ()
2363 return the_native_target
;
2366 /* Look through the list of possible targets for a target that can
2367 execute a run or attach command without any other data. This is
2368 used to locate the default process stratum.
2370 If DO_MESG is not NULL, the result is always valid (error() is
2371 called for errors); else, return NULL on error. */
2373 static struct target_ops
*
2374 find_default_run_target (const char *do_mesg
)
2376 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2377 return the_native_target
;
2379 if (do_mesg
!= NULL
)
2380 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2387 find_attach_target (void)
2389 /* If a target on the current stack can attach, use it. */
2390 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2392 if (t
->can_attach ())
2396 /* Otherwise, use the default run target for attaching. */
2397 return find_default_run_target ("attach");
2403 find_run_target (void)
2405 /* If a target on the current stack can run, use it. */
2406 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2408 if (t
->can_create_inferior ())
2412 /* Otherwise, use the default run target. */
2413 return find_default_run_target ("run");
2417 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2422 /* Implement the "info proc" command. */
2425 target_info_proc (const char *args
, enum info_proc_what what
)
2427 struct target_ops
*t
;
2429 /* If we're already connected to something that can get us OS
2430 related data, use it. Otherwise, try using the native
2432 t
= find_target_at (process_stratum
);
2434 t
= find_default_run_target (NULL
);
2436 for (; t
!= NULL
; t
= t
->beneath ())
2438 if (t
->info_proc (args
, what
))
2441 fprintf_unfiltered (gdb_stdlog
,
2442 "target_info_proc (\"%s\", %d)\n", args
, what
);
2452 find_default_supports_disable_randomization (struct target_ops
*self
)
2454 struct target_ops
*t
;
2456 t
= find_default_run_target (NULL
);
2458 return t
->supports_disable_randomization ();
2463 target_supports_disable_randomization (void)
2465 return current_top_target ()->supports_disable_randomization ();
2468 /* See target/target.h. */
2471 target_supports_multi_process (void)
2473 return current_top_target ()->supports_multi_process ();
2478 gdb::optional
<gdb::char_vector
>
2479 target_get_osdata (const char *type
)
2481 struct target_ops
*t
;
2483 /* If we're already connected to something that can get us OS
2484 related data, use it. Otherwise, try using the native
2486 t
= find_target_at (process_stratum
);
2488 t
= find_default_run_target ("get OS data");
2493 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2496 /* Determine the current address space of thread PTID. */
2498 struct address_space
*
2499 target_thread_address_space (ptid_t ptid
)
2501 struct address_space
*aspace
;
2503 aspace
= current_top_target ()->thread_address_space (ptid
);
2504 gdb_assert (aspace
!= NULL
);
2512 target_ops::beneath () const
2514 return current_inferior ()->find_target_beneath (this);
2518 target_ops::close ()
2523 target_ops::can_attach ()
2529 target_ops::attach (const char *, int)
2531 gdb_assert_not_reached ("target_ops::attach called");
2535 target_ops::can_create_inferior ()
2541 target_ops::create_inferior (const char *, const std::string
&,
2544 gdb_assert_not_reached ("target_ops::create_inferior called");
2548 target_ops::can_run ()
2556 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2565 /* Target file operations. */
2567 static struct target_ops
*
2568 default_fileio_target (void)
2570 struct target_ops
*t
;
2572 /* If we're already connected to something that can perform
2573 file I/O, use it. Otherwise, try using the native target. */
2574 t
= find_target_at (process_stratum
);
2577 return find_default_run_target ("file I/O");
2580 /* File handle for target file operations. */
2584 /* The target on which this file is open. NULL if the target is
2585 meanwhile closed while the handle is open. */
2588 /* The file descriptor on the target. */
2591 /* Check whether this fileio_fh_t represents a closed file. */
2594 return target_fd
< 0;
2598 /* Vector of currently open file handles. The value returned by
2599 target_fileio_open and passed as the FD argument to other
2600 target_fileio_* functions is an index into this vector. This
2601 vector's entries are never freed; instead, files are marked as
2602 closed, and the handle becomes available for reuse. */
2603 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2605 /* Index into fileio_fhandles of the lowest handle that might be
2606 closed. This permits handle reuse without searching the whole
2607 list each time a new file is opened. */
2608 static int lowest_closed_fd
;
2610 /* Invalidate the target associated with open handles that were open
2611 on target TARG, since we're about to close (and maybe destroy) the
2612 target. The handles remain open from the client's perspective, but
2613 trying to do anything with them other than closing them will fail
2617 fileio_handles_invalidate_target (target_ops
*targ
)
2619 for (fileio_fh_t
&fh
: fileio_fhandles
)
2620 if (fh
.target
== targ
)
2624 /* Acquire a target fileio file descriptor. */
2627 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2629 /* Search for closed handles to reuse. */
2630 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2632 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2634 if (fh
.is_closed ())
2638 /* Push a new handle if no closed handles were found. */
2639 if (lowest_closed_fd
== fileio_fhandles
.size ())
2640 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2642 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2644 /* Should no longer be marked closed. */
2645 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2647 /* Return its index, and start the next lookup at
2649 return lowest_closed_fd
++;
2652 /* Release a target fileio file descriptor. */
2655 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2658 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2661 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2663 static fileio_fh_t
*
2664 fileio_fd_to_fh (int fd
)
2666 return &fileio_fhandles
[fd
];
2670 /* Default implementations of file i/o methods. We don't want these
2671 to delegate automatically, because we need to know which target
2672 supported the method, in order to call it directly from within
2673 pread/pwrite, etc. */
2676 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2677 int flags
, int mode
, int warn_if_slow
,
2680 *target_errno
= FILEIO_ENOSYS
;
2685 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2686 ULONGEST offset
, int *target_errno
)
2688 *target_errno
= FILEIO_ENOSYS
;
2693 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2694 ULONGEST offset
, int *target_errno
)
2696 *target_errno
= FILEIO_ENOSYS
;
2701 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2703 *target_errno
= FILEIO_ENOSYS
;
2708 target_ops::fileio_close (int fd
, int *target_errno
)
2710 *target_errno
= FILEIO_ENOSYS
;
2715 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2718 *target_errno
= FILEIO_ENOSYS
;
2722 gdb::optional
<std::string
>
2723 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2726 *target_errno
= FILEIO_ENOSYS
;
2733 target_fileio_open (struct inferior
*inf
, const char *filename
,
2734 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
2736 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2738 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2739 warn_if_slow
, target_errno
);
2741 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2747 fd
= acquire_fileio_fd (t
, fd
);
2750 fprintf_unfiltered (gdb_stdlog
,
2751 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2753 inf
== NULL
? 0 : inf
->num
,
2754 filename
, flags
, mode
,
2756 fd
!= -1 ? 0 : *target_errno
);
2760 *target_errno
= FILEIO_ENOSYS
;
2767 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2768 ULONGEST offset
, int *target_errno
)
2770 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2773 if (fh
->is_closed ())
2774 *target_errno
= EBADF
;
2775 else if (fh
->target
== NULL
)
2776 *target_errno
= EIO
;
2778 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2779 len
, offset
, target_errno
);
2782 fprintf_unfiltered (gdb_stdlog
,
2783 "target_fileio_pwrite (%d,...,%d,%s) "
2785 fd
, len
, pulongest (offset
),
2786 ret
, ret
!= -1 ? 0 : *target_errno
);
2793 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2794 ULONGEST offset
, int *target_errno
)
2796 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2799 if (fh
->is_closed ())
2800 *target_errno
= EBADF
;
2801 else if (fh
->target
== NULL
)
2802 *target_errno
= EIO
;
2804 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2805 len
, offset
, target_errno
);
2808 fprintf_unfiltered (gdb_stdlog
,
2809 "target_fileio_pread (%d,...,%d,%s) "
2811 fd
, len
, pulongest (offset
),
2812 ret
, ret
!= -1 ? 0 : *target_errno
);
2819 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2821 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2824 if (fh
->is_closed ())
2825 *target_errno
= EBADF
;
2826 else if (fh
->target
== NULL
)
2827 *target_errno
= EIO
;
2829 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2832 fprintf_unfiltered (gdb_stdlog
,
2833 "target_fileio_fstat (%d) = %d (%d)\n",
2834 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2841 target_fileio_close (int fd
, int *target_errno
)
2843 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2846 if (fh
->is_closed ())
2847 *target_errno
= EBADF
;
2850 if (fh
->target
!= NULL
)
2851 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2855 release_fileio_fd (fd
, fh
);
2859 fprintf_unfiltered (gdb_stdlog
,
2860 "target_fileio_close (%d) = %d (%d)\n",
2861 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2868 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2871 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2873 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2875 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2879 fprintf_unfiltered (gdb_stdlog
,
2880 "target_fileio_unlink (%d,%s)"
2882 inf
== NULL
? 0 : inf
->num
, filename
,
2883 ret
, ret
!= -1 ? 0 : *target_errno
);
2887 *target_errno
= FILEIO_ENOSYS
;
2893 gdb::optional
<std::string
>
2894 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2897 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2899 gdb::optional
<std::string
> ret
2900 = t
->fileio_readlink (inf
, filename
, target_errno
);
2902 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2906 fprintf_unfiltered (gdb_stdlog
,
2907 "target_fileio_readlink (%d,%s)"
2909 inf
== NULL
? 0 : inf
->num
,
2910 filename
, ret
? ret
->c_str () : "(nil)",
2911 ret
? 0 : *target_errno
);
2915 *target_errno
= FILEIO_ENOSYS
;
2919 /* Like scoped_fd, but specific to target fileio. */
2921 class scoped_target_fd
2924 explicit scoped_target_fd (int fd
) noexcept
2929 ~scoped_target_fd ()
2935 target_fileio_close (m_fd
, &target_errno
);
2939 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
2941 int get () const noexcept
2950 /* Read target file FILENAME, in the filesystem as seen by INF. If
2951 INF is NULL, use the filesystem seen by the debugger (GDB or, for
2952 remote targets, the remote stub). Store the result in *BUF_P and
2953 return the size of the transferred data. PADDING additional bytes
2954 are available in *BUF_P. This is a helper function for
2955 target_fileio_read_alloc; see the declaration of that function for
2956 more information. */
2959 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
2960 gdb_byte
**buf_p
, int padding
)
2962 size_t buf_alloc
, buf_pos
;
2967 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
2968 0700, false, &target_errno
));
2969 if (fd
.get () == -1)
2972 /* Start by reading up to 4K at a time. The target will throttle
2973 this number down if necessary. */
2975 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
2979 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
2980 buf_alloc
- buf_pos
- padding
, buf_pos
,
2984 /* An error occurred. */
2990 /* Read all there was. */
3000 /* If the buffer is filling up, expand it. */
3001 if (buf_alloc
< buf_pos
* 2)
3004 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3014 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3017 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3022 gdb::unique_xmalloc_ptr
<char>
3023 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3027 LONGEST i
, transferred
;
3029 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3030 bufstr
= (char *) buffer
;
3032 if (transferred
< 0)
3033 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3035 if (transferred
== 0)
3036 return make_unique_xstrdup ("");
3038 bufstr
[transferred
] = 0;
3040 /* Check for embedded NUL bytes; but allow trailing NULs. */
3041 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3044 warning (_("target file %s "
3045 "contained unexpected null characters"),
3050 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3055 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3056 CORE_ADDR addr
, int len
)
3058 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3062 default_watchpoint_addr_within_range (struct target_ops
*target
,
3064 CORE_ADDR start
, int length
)
3066 return addr
>= start
&& addr
< start
+ length
;
3072 target_stack::find_beneath (const target_ops
*t
) const
3074 /* Look for a non-empty slot at stratum levels beneath T's. */
3075 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3076 if (m_stack
[stratum
] != NULL
)
3077 return m_stack
[stratum
];
3085 find_target_at (enum strata stratum
)
3087 return current_inferior ()->target_at (stratum
);
3095 target_announce_detach (int from_tty
)
3098 const char *exec_file
;
3103 exec_file
= get_exec_file (0);
3104 if (exec_file
== NULL
)
3107 pid
= inferior_ptid
.pid ();
3108 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3109 target_pid_to_str (ptid_t (pid
)).c_str ());
3112 /* The inferior process has died. Long live the inferior! */
3115 generic_mourn_inferior (void)
3117 inferior
*inf
= current_inferior ();
3119 switch_to_no_thread ();
3121 /* Mark breakpoints uninserted in case something tries to delete a
3122 breakpoint while we delete the inferior's threads (which would
3123 fail, since the inferior is long gone). */
3124 mark_breakpoints_out ();
3127 exit_inferior (inf
);
3129 /* Note this wipes step-resume breakpoints, so needs to be done
3130 after exit_inferior, which ends up referencing the step-resume
3131 breakpoints through clear_thread_inferior_resources. */
3132 breakpoint_init_inferior (inf_exited
);
3134 registers_changed ();
3136 reopen_exec_file ();
3137 reinit_frame_cache ();
3139 if (deprecated_detach_hook
)
3140 deprecated_detach_hook ();
3143 /* Convert a normal process ID to a string. Returns the string in a
3147 normal_pid_to_str (ptid_t ptid
)
3149 return string_printf ("process %d", ptid
.pid ());
3153 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3155 return normal_pid_to_str (ptid
);
3158 /* Error-catcher for target_find_memory_regions. */
3160 dummy_find_memory_regions (struct target_ops
*self
,
3161 find_memory_region_ftype ignore1
, void *ignore2
)
3163 error (_("Command not implemented for this target."));
3167 /* Error-catcher for target_make_corefile_notes. */
3169 dummy_make_corefile_notes (struct target_ops
*self
,
3170 bfd
*ignore1
, int *ignore2
)
3172 error (_("Command not implemented for this target."));
3176 #include "target-delegates.c"
3178 /* The initial current target, so that there is always a semi-valid
3181 static dummy_target the_dummy_target
;
3188 return &the_dummy_target
;
3191 static const target_info dummy_target_info
= {
3198 dummy_target::stratum () const
3200 return dummy_stratum
;
3204 debug_target::stratum () const
3206 return debug_stratum
;
3210 dummy_target::info () const
3212 return dummy_target_info
;
3216 debug_target::info () const
3218 return beneath ()->info ();
3224 target_close (struct target_ops
*targ
)
3226 gdb_assert (!target_is_pushed (targ
));
3228 fileio_handles_invalidate_target (targ
);
3233 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3237 target_thread_alive (ptid_t ptid
)
3239 return current_top_target ()->thread_alive (ptid
);
3243 target_update_thread_list (void)
3245 current_top_target ()->update_thread_list ();
3249 target_stop (ptid_t ptid
)
3253 warning (_("May not interrupt or stop the target, ignoring attempt"));
3257 current_top_target ()->stop (ptid
);
3265 warning (_("May not interrupt or stop the target, ignoring attempt"));
3269 current_top_target ()->interrupt ();
3275 target_pass_ctrlc (void)
3277 /* Pass the Ctrl-C to the first target that has a thread
3279 for (inferior
*inf
: all_inferiors ())
3281 target_ops
*proc_target
= inf
->process_target ();
3282 if (proc_target
== NULL
)
3285 for (thread_info
*thr
: inf
->non_exited_threads ())
3287 /* A thread can be THREAD_STOPPED and executing, while
3288 running an infcall. */
3289 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3291 /* We can get here quite deep in target layers. Avoid
3292 switching thread context or anything that would
3293 communicate with the target (e.g., to fetch
3294 registers), or flushing e.g., the frame cache. We
3295 just switch inferior in order to be able to call
3296 through the target_stack. */
3297 scoped_restore_current_inferior restore_inferior
;
3298 set_current_inferior (inf
);
3299 current_top_target ()->pass_ctrlc ();
3309 default_target_pass_ctrlc (struct target_ops
*ops
)
3311 target_interrupt ();
3314 /* See target/target.h. */
3317 target_stop_and_wait (ptid_t ptid
)
3319 struct target_waitstatus status
;
3320 bool was_non_stop
= non_stop
;
3325 memset (&status
, 0, sizeof (status
));
3326 target_wait (ptid
, &status
, 0);
3328 non_stop
= was_non_stop
;
3331 /* See target/target.h. */
3334 target_continue_no_signal (ptid_t ptid
)
3336 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3339 /* See target/target.h. */
3342 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3344 target_resume (ptid
, 0, signal
);
3347 /* Concatenate ELEM to LIST, a comma-separated list. */
3350 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3352 if (!list
->empty ())
3353 list
->append (", ");
3355 list
->append (elem
);
3358 /* Helper for target_options_to_string. If OPT is present in
3359 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3360 OPT is removed from TARGET_OPTIONS. */
3363 do_option (int *target_options
, std::string
*ret
,
3364 int opt
, const char *opt_str
)
3366 if ((*target_options
& opt
) != 0)
3368 str_comma_list_concat_elem (ret
, opt_str
);
3369 *target_options
&= ~opt
;
3376 target_options_to_string (int target_options
)
3380 #define DO_TARG_OPTION(OPT) \
3381 do_option (&target_options, &ret, OPT, #OPT)
3383 DO_TARG_OPTION (TARGET_WNOHANG
);
3385 if (target_options
!= 0)
3386 str_comma_list_concat_elem (&ret
, "unknown???");
3392 target_fetch_registers (struct regcache
*regcache
, int regno
)
3394 current_top_target ()->fetch_registers (regcache
, regno
);
3396 regcache
->debug_print_register ("target_fetch_registers", regno
);
3400 target_store_registers (struct regcache
*regcache
, int regno
)
3402 if (!may_write_registers
)
3403 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3405 current_top_target ()->store_registers (regcache
, regno
);
3408 regcache
->debug_print_register ("target_store_registers", regno
);
3413 target_core_of_thread (ptid_t ptid
)
3415 return current_top_target ()->core_of_thread (ptid
);
3419 simple_verify_memory (struct target_ops
*ops
,
3420 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3422 LONGEST total_xfered
= 0;
3424 while (total_xfered
< size
)
3426 ULONGEST xfered_len
;
3427 enum target_xfer_status status
;
3429 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3431 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3432 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3434 if (status
== TARGET_XFER_OK
3435 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3437 total_xfered
+= xfered_len
;
3446 /* Default implementation of memory verification. */
3449 default_verify_memory (struct target_ops
*self
,
3450 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3452 /* Start over from the top of the target stack. */
3453 return simple_verify_memory (current_top_target (),
3454 data
, memaddr
, size
);
3458 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3460 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3463 /* The documentation for this function is in its prototype declaration in
3467 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3468 enum target_hw_bp_type rw
)
3470 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3473 /* The documentation for this function is in its prototype declaration in
3477 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3478 enum target_hw_bp_type rw
)
3480 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3483 /* The documentation for this function is in its prototype declaration
3487 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3489 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3492 /* The documentation for this function is in its prototype declaration
3496 target_ranged_break_num_registers (void)
3498 return current_top_target ()->ranged_break_num_registers ();
3503 struct btrace_target_info
*
3504 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3506 return current_top_target ()->enable_btrace (ptid
, conf
);
3512 target_disable_btrace (struct btrace_target_info
*btinfo
)
3514 current_top_target ()->disable_btrace (btinfo
);
3520 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3522 current_top_target ()->teardown_btrace (btinfo
);
3528 target_read_btrace (struct btrace_data
*btrace
,
3529 struct btrace_target_info
*btinfo
,
3530 enum btrace_read_type type
)
3532 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3537 const struct btrace_config
*
3538 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3540 return current_top_target ()->btrace_conf (btinfo
);
3546 target_stop_recording (void)
3548 current_top_target ()->stop_recording ();
3554 target_save_record (const char *filename
)
3556 current_top_target ()->save_record (filename
);
3562 target_supports_delete_record ()
3564 return current_top_target ()->supports_delete_record ();
3570 target_delete_record (void)
3572 current_top_target ()->delete_record ();
3578 target_record_method (ptid_t ptid
)
3580 return current_top_target ()->record_method (ptid
);
3586 target_record_is_replaying (ptid_t ptid
)
3588 return current_top_target ()->record_is_replaying (ptid
);
3594 target_record_will_replay (ptid_t ptid
, int dir
)
3596 return current_top_target ()->record_will_replay (ptid
, dir
);
3602 target_record_stop_replaying (void)
3604 current_top_target ()->record_stop_replaying ();
3610 target_goto_record_begin (void)
3612 current_top_target ()->goto_record_begin ();
3618 target_goto_record_end (void)
3620 current_top_target ()->goto_record_end ();
3626 target_goto_record (ULONGEST insn
)
3628 current_top_target ()->goto_record (insn
);
3634 target_insn_history (int size
, gdb_disassembly_flags flags
)
3636 current_top_target ()->insn_history (size
, flags
);
3642 target_insn_history_from (ULONGEST from
, int size
,
3643 gdb_disassembly_flags flags
)
3645 current_top_target ()->insn_history_from (from
, size
, flags
);
3651 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3652 gdb_disassembly_flags flags
)
3654 current_top_target ()->insn_history_range (begin
, end
, flags
);
3660 target_call_history (int size
, record_print_flags flags
)
3662 current_top_target ()->call_history (size
, flags
);
3668 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3670 current_top_target ()->call_history_from (begin
, size
, flags
);
3676 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3678 current_top_target ()->call_history_range (begin
, end
, flags
);
3683 const struct frame_unwind
*
3684 target_get_unwinder (void)
3686 return current_top_target ()->get_unwinder ();
3691 const struct frame_unwind
*
3692 target_get_tailcall_unwinder (void)
3694 return current_top_target ()->get_tailcall_unwinder ();
3700 target_prepare_to_generate_core (void)
3702 current_top_target ()->prepare_to_generate_core ();
3708 target_done_generating_core (void)
3710 current_top_target ()->done_generating_core ();
3715 static char targ_desc
[] =
3716 "Names of targets and files being debugged.\nShows the entire \
3717 stack of targets currently in use (including the exec-file,\n\
3718 core-file, and process, if any), as well as the symbol file name.";
3721 default_rcmd (struct target_ops
*self
, const char *command
,
3722 struct ui_file
*output
)
3724 error (_("\"monitor\" command not supported by this target."));
3728 do_monitor_command (const char *cmd
, int from_tty
)
3730 target_rcmd (cmd
, gdb_stdtarg
);
3733 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3737 flash_erase_command (const char *cmd
, int from_tty
)
3739 /* Used to communicate termination of flash operations to the target. */
3740 bool found_flash_region
= false;
3741 struct gdbarch
*gdbarch
= target_gdbarch ();
3743 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3745 /* Iterate over all memory regions. */
3746 for (const mem_region
&m
: mem_regions
)
3748 /* Is this a flash memory region? */
3749 if (m
.attrib
.mode
== MEM_FLASH
)
3751 found_flash_region
= true;
3752 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3754 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3756 current_uiout
->message (_("Erasing flash memory region at address "));
3757 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3758 current_uiout
->message (", size = ");
3759 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3760 current_uiout
->message ("\n");
3764 /* Did we do any flash operations? If so, we need to finalize them. */
3765 if (found_flash_region
)
3766 target_flash_done ();
3768 current_uiout
->message (_("No flash memory regions found.\n"));
3771 /* Print the name of each layers of our target stack. */
3774 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3776 printf_filtered (_("The current target stack is:\n"));
3778 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3780 if (t
->stratum () == debug_stratum
)
3782 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3789 target_async (int enable
)
3791 infrun_async (enable
);
3792 current_top_target ()->async (enable
);
3798 target_thread_events (int enable
)
3800 current_top_target ()->thread_events (enable
);
3803 /* Controls if targets can report that they can/are async. This is
3804 just for maintainers to use when debugging gdb. */
3805 bool target_async_permitted
= true;
3807 /* The set command writes to this variable. If the inferior is
3808 executing, target_async_permitted is *not* updated. */
3809 static bool target_async_permitted_1
= true;
3812 maint_set_target_async_command (const char *args
, int from_tty
,
3813 struct cmd_list_element
*c
)
3815 if (have_live_inferiors ())
3817 target_async_permitted_1
= target_async_permitted
;
3818 error (_("Cannot change this setting while the inferior is running."));
3821 target_async_permitted
= target_async_permitted_1
;
3825 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3826 struct cmd_list_element
*c
,
3829 fprintf_filtered (file
,
3830 _("Controlling the inferior in "
3831 "asynchronous mode is %s.\n"), value
);
3834 /* Return true if the target operates in non-stop mode even with "set
3838 target_always_non_stop_p (void)
3840 return current_top_target ()->always_non_stop_p ();
3846 target_is_non_stop_p (void)
3849 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3850 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3851 && target_always_non_stop_p ()));
3857 exists_non_stop_target ()
3859 if (target_is_non_stop_p ())
3862 scoped_restore_current_thread restore_thread
;
3864 for (inferior
*inf
: all_inferiors ())
3866 switch_to_inferior_no_thread (inf
);
3867 if (target_is_non_stop_p ())
3874 /* Controls if targets can report that they always run in non-stop
3875 mode. This is just for maintainers to use when debugging gdb. */
3876 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3878 /* The set command writes to this variable. If the inferior is
3879 executing, target_non_stop_enabled is *not* updated. */
3880 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3882 /* Implementation of "maint set target-non-stop". */
3885 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3886 struct cmd_list_element
*c
)
3888 if (have_live_inferiors ())
3890 target_non_stop_enabled_1
= target_non_stop_enabled
;
3891 error (_("Cannot change this setting while the inferior is running."));
3894 target_non_stop_enabled
= target_non_stop_enabled_1
;
3897 /* Implementation of "maint show target-non-stop". */
3900 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3901 struct cmd_list_element
*c
,
3904 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3905 fprintf_filtered (file
,
3906 _("Whether the target is always in non-stop mode "
3907 "is %s (currently %s).\n"), value
,
3908 target_always_non_stop_p () ? "on" : "off");
3910 fprintf_filtered (file
,
3911 _("Whether the target is always in non-stop mode "
3912 "is %s.\n"), value
);
3915 /* Temporary copies of permission settings. */
3917 static bool may_write_registers_1
= true;
3918 static bool may_write_memory_1
= true;
3919 static bool may_insert_breakpoints_1
= true;
3920 static bool may_insert_tracepoints_1
= true;
3921 static bool may_insert_fast_tracepoints_1
= true;
3922 static bool may_stop_1
= true;
3924 /* Make the user-set values match the real values again. */
3927 update_target_permissions (void)
3929 may_write_registers_1
= may_write_registers
;
3930 may_write_memory_1
= may_write_memory
;
3931 may_insert_breakpoints_1
= may_insert_breakpoints
;
3932 may_insert_tracepoints_1
= may_insert_tracepoints
;
3933 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3934 may_stop_1
= may_stop
;
3937 /* The one function handles (most of) the permission flags in the same
3941 set_target_permissions (const char *args
, int from_tty
,
3942 struct cmd_list_element
*c
)
3944 if (target_has_execution
)
3946 update_target_permissions ();
3947 error (_("Cannot change this setting while the inferior is running."));
3950 /* Make the real values match the user-changed values. */
3951 may_write_registers
= may_write_registers_1
;
3952 may_insert_breakpoints
= may_insert_breakpoints_1
;
3953 may_insert_tracepoints
= may_insert_tracepoints_1
;
3954 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3955 may_stop
= may_stop_1
;
3956 update_observer_mode ();
3959 /* Set memory write permission independently of observer mode. */
3962 set_write_memory_permission (const char *args
, int from_tty
,
3963 struct cmd_list_element
*c
)
3965 /* Make the real values match the user-changed values. */
3966 may_write_memory
= may_write_memory_1
;
3967 update_observer_mode ();
3970 void _initialize_target ();
3973 _initialize_target ()
3975 the_debug_target
= new debug_target ();
3977 add_info ("target", info_target_command
, targ_desc
);
3978 add_info ("files", info_target_command
, targ_desc
);
3980 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3981 Set target debugging."), _("\
3982 Show target debugging."), _("\
3983 When non-zero, target debugging is enabled. Higher numbers are more\n\
3987 &setdebuglist
, &showdebuglist
);
3989 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3990 &trust_readonly
, _("\
3991 Set mode for reading from readonly sections."), _("\
3992 Show mode for reading from readonly sections."), _("\
3993 When this mode is on, memory reads from readonly sections (such as .text)\n\
3994 will be read from the object file instead of from the target. This will\n\
3995 result in significant performance improvement for remote targets."),
3997 show_trust_readonly
,
3998 &setlist
, &showlist
);
4000 add_com ("monitor", class_obscure
, do_monitor_command
,
4001 _("Send a command to the remote monitor (remote targets only)."));
4003 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4004 _("Print the name of each layer of the internal target stack."),
4005 &maintenanceprintlist
);
4007 add_setshow_boolean_cmd ("target-async", no_class
,
4008 &target_async_permitted_1
, _("\
4009 Set whether gdb controls the inferior in asynchronous mode."), _("\
4010 Show whether gdb controls the inferior in asynchronous mode."), _("\
4011 Tells gdb whether to control the inferior in asynchronous mode."),
4012 maint_set_target_async_command
,
4013 maint_show_target_async_command
,
4014 &maintenance_set_cmdlist
,
4015 &maintenance_show_cmdlist
);
4017 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4018 &target_non_stop_enabled_1
, _("\
4019 Set whether gdb always controls the inferior in non-stop mode."), _("\
4020 Show whether gdb always controls the inferior in non-stop mode."), _("\
4021 Tells gdb whether to control the inferior in non-stop mode."),
4022 maint_set_target_non_stop_command
,
4023 maint_show_target_non_stop_command
,
4024 &maintenance_set_cmdlist
,
4025 &maintenance_show_cmdlist
);
4027 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4028 &may_write_registers_1
, _("\
4029 Set permission to write into registers."), _("\
4030 Show permission to write into registers."), _("\
4031 When this permission is on, GDB may write into the target's registers.\n\
4032 Otherwise, any sort of write attempt will result in an error."),
4033 set_target_permissions
, NULL
,
4034 &setlist
, &showlist
);
4036 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4037 &may_write_memory_1
, _("\
4038 Set permission to write into target memory."), _("\
4039 Show permission to write into target memory."), _("\
4040 When this permission is on, GDB may write into the target's memory.\n\
4041 Otherwise, any sort of write attempt will result in an error."),
4042 set_write_memory_permission
, NULL
,
4043 &setlist
, &showlist
);
4045 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4046 &may_insert_breakpoints_1
, _("\
4047 Set permission to insert breakpoints in the target."), _("\
4048 Show permission to insert breakpoints in the target."), _("\
4049 When this permission is on, GDB may insert breakpoints in the program.\n\
4050 Otherwise, any sort of insertion attempt will result in an error."),
4051 set_target_permissions
, NULL
,
4052 &setlist
, &showlist
);
4054 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4055 &may_insert_tracepoints_1
, _("\
4056 Set permission to insert tracepoints in the target."), _("\
4057 Show permission to insert tracepoints in the target."), _("\
4058 When this permission is on, GDB may insert tracepoints in the program.\n\
4059 Otherwise, any sort of insertion attempt will result in an error."),
4060 set_target_permissions
, NULL
,
4061 &setlist
, &showlist
);
4063 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4064 &may_insert_fast_tracepoints_1
, _("\
4065 Set permission to insert fast tracepoints in the target."), _("\
4066 Show permission to insert fast tracepoints in the target."), _("\
4067 When this permission is on, GDB may insert fast tracepoints.\n\
4068 Otherwise, any sort of insertion attempt will result in an error."),
4069 set_target_permissions
, NULL
,
4070 &setlist
, &showlist
);
4072 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4074 Set permission to interrupt or signal the target."), _("\
4075 Show permission to interrupt or signal the target."), _("\
4076 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4077 Otherwise, any attempt to interrupt or stop will be ignored."),
4078 set_target_permissions
, NULL
,
4079 &setlist
, &showlist
);
4081 add_com ("flash-erase", no_class
, flash_erase_command
,
4082 _("Erase all flash memory regions."));
4084 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4085 &auto_connect_native_target
, _("\
4086 Set whether GDB may automatically connect to the native target."), _("\
4087 Show whether GDB may automatically connect to the native target."), _("\
4088 When on, and GDB is not connected to a target yet, GDB\n\
4089 attempts \"run\" and other commands with the native target."),
4090 NULL
, show_auto_connect_native_target
,
4091 &setlist
, &showlist
);