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"
54 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
56 static void default_terminal_info (struct target_ops
*, const char *, int);
58 static int default_watchpoint_addr_within_range (struct target_ops
*,
59 CORE_ADDR
, CORE_ADDR
, int);
61 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
64 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
66 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
69 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
72 static void default_mourn_inferior (struct target_ops
*self
);
74 static int default_search_memory (struct target_ops
*ops
,
76 ULONGEST search_space_len
,
77 const gdb_byte
*pattern
,
79 CORE_ADDR
*found_addrp
);
81 static int default_verify_memory (struct target_ops
*self
,
83 CORE_ADDR memaddr
, ULONGEST size
);
85 static void tcomplain (void) ATTRIBUTE_NORETURN
;
87 static struct target_ops
*find_default_run_target (const char *);
89 static int dummy_find_memory_regions (struct target_ops
*self
,
90 find_memory_region_ftype ignore1
,
93 static char *dummy_make_corefile_notes (struct target_ops
*self
,
94 bfd
*ignore1
, int *ignore2
);
96 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
98 static enum exec_direction_kind default_execution_direction
99 (struct target_ops
*self
);
101 /* Mapping between target_info objects (which have address identity)
102 and corresponding open/factory function/callback. Each add_target
103 call adds one entry to this map, and registers a "target
104 TARGET_NAME" command that when invoked calls the factory registered
105 here. The target_info object is associated with the command via
106 the command's context. */
107 static std::unordered_map
<const target_info
*, target_open_ftype
*>
110 /* The singleton debug target. */
112 static struct target_ops
*the_debug_target
;
114 /* Top of target stack. */
115 /* The target structure we are currently using to talk to a process
116 or file or whatever "inferior" we have. */
119 current_top_target ()
121 return current_inferior ()->top_target ();
124 /* Command list for target. */
126 static struct cmd_list_element
*targetlist
= NULL
;
128 /* True if we should trust readonly sections from the
129 executable when reading memory. */
131 static bool trust_readonly
= false;
133 /* Nonzero if we should show true memory content including
134 memory breakpoint inserted by gdb. */
136 static int show_memory_breakpoints
= 0;
138 /* These globals control whether GDB attempts to perform these
139 operations; they are useful for targets that need to prevent
140 inadvertent disruption, such as in non-stop mode. */
142 bool may_write_registers
= true;
144 bool may_write_memory
= true;
146 bool may_insert_breakpoints
= true;
148 bool may_insert_tracepoints
= true;
150 bool may_insert_fast_tracepoints
= true;
152 bool may_stop
= true;
154 /* Non-zero if we want to see trace of target level stuff. */
156 static unsigned int targetdebug
= 0;
159 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
162 push_target (the_debug_target
);
164 unpush_target (the_debug_target
);
168 show_targetdebug (struct ui_file
*file
, int from_tty
,
169 struct cmd_list_element
*c
, const char *value
)
171 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
174 /* The user just typed 'target' without the name of a target. */
177 target_command (const char *arg
, int from_tty
)
179 fputs_filtered ("Argument required (target name). Try `help target'\n",
184 target_has_all_memory_1 (void)
186 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
187 if (t
->has_all_memory ())
194 target_has_memory_1 (void)
196 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
197 if (t
->has_memory ())
204 target_has_stack_1 (void)
206 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
214 target_has_registers_1 (void)
216 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
217 if (t
->has_registers ())
224 target_has_execution_1 (inferior
*inf
)
226 for (target_ops
*t
= inf
->top_target ();
228 t
= inf
->find_target_beneath (t
))
229 if (t
->has_execution (inf
))
236 target_has_execution_current (void)
238 return target_has_execution_1 (current_inferior ());
241 /* This is used to implement the various target commands. */
244 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
246 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
247 target_open_ftype
*func
= target_factories
[ti
];
250 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
253 func (args
, from_tty
);
256 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
257 ti
->shortname
, args
, from_tty
);
263 add_target (const target_info
&t
, target_open_ftype
*func
,
264 completer_ftype
*completer
)
266 struct cmd_list_element
*c
;
268 auto &func_slot
= target_factories
[&t
];
269 if (func_slot
!= nullptr)
270 internal_error (__FILE__
, __LINE__
,
271 _("target already added (\"%s\")."), t
.shortname
);
274 if (targetlist
== NULL
)
275 add_prefix_cmd ("target", class_run
, target_command
, _("\
276 Connect to a target machine or process.\n\
277 The first argument is the type or protocol of the target machine.\n\
278 Remaining arguments are interpreted by the target protocol. For more\n\
279 information on the arguments for a particular protocol, type\n\
280 `help target ' followed by the protocol name."),
281 &targetlist
, "target ", 0, &cmdlist
);
282 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
283 set_cmd_context (c
, (void *) &t
);
284 set_cmd_sfunc (c
, open_target
);
285 if (completer
!= NULL
)
286 set_cmd_completer (c
, completer
);
292 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
294 struct cmd_list_element
*c
;
297 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
299 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
300 set_cmd_sfunc (c
, open_target
);
301 set_cmd_context (c
, (void *) &tinfo
);
302 alt
= xstrprintf ("target %s", tinfo
.shortname
);
303 deprecate_cmd (c
, alt
);
311 current_top_target ()->kill ();
315 target_load (const char *arg
, int from_tty
)
317 target_dcache_invalidate ();
318 current_top_target ()->load (arg
, from_tty
);
323 target_terminal_state
target_terminal::m_terminal_state
324 = target_terminal_state::is_ours
;
326 /* See target/target.h. */
329 target_terminal::init (void)
331 current_top_target ()->terminal_init ();
333 m_terminal_state
= target_terminal_state::is_ours
;
336 /* See target/target.h. */
339 target_terminal::inferior (void)
341 struct ui
*ui
= current_ui
;
343 /* A background resume (``run&'') should leave GDB in control of the
345 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
348 /* Since we always run the inferior in the main console (unless "set
349 inferior-tty" is in effect), when some UI other than the main one
350 calls target_terminal::inferior, then we leave the main UI's
351 terminal settings as is. */
355 /* If GDB is resuming the inferior in the foreground, install
356 inferior's terminal modes. */
358 struct inferior
*inf
= current_inferior ();
360 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
362 current_top_target ()->terminal_inferior ();
363 inf
->terminal_state
= target_terminal_state::is_inferior
;
366 m_terminal_state
= target_terminal_state::is_inferior
;
368 /* If the user hit C-c before, pretend that it was hit right
370 if (check_quit_flag ())
371 target_pass_ctrlc ();
374 /* See target/target.h. */
377 target_terminal::restore_inferior (void)
379 struct ui
*ui
= current_ui
;
381 /* See target_terminal::inferior(). */
382 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
385 /* Restore the terminal settings of inferiors that were in the
386 foreground but are now ours_for_output due to a temporary
387 target_target::ours_for_output() call. */
390 scoped_restore_current_inferior restore_inferior
;
392 for (::inferior
*inf
: all_inferiors ())
394 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
396 set_current_inferior (inf
);
397 current_top_target ()->terminal_inferior ();
398 inf
->terminal_state
= target_terminal_state::is_inferior
;
403 m_terminal_state
= target_terminal_state::is_inferior
;
405 /* If the user hit C-c before, pretend that it was hit right
407 if (check_quit_flag ())
408 target_pass_ctrlc ();
411 /* Switch terminal state to DESIRED_STATE, either is_ours, or
412 is_ours_for_output. */
415 target_terminal_is_ours_kind (target_terminal_state desired_state
)
417 scoped_restore_current_inferior restore_inferior
;
419 /* Must do this in two passes. First, have all inferiors save the
420 current terminal settings. Then, after all inferiors have add a
421 chance to safely save the terminal settings, restore GDB's
422 terminal settings. */
424 for (inferior
*inf
: all_inferiors ())
426 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
428 set_current_inferior (inf
);
429 current_top_target ()->terminal_save_inferior ();
433 for (inferior
*inf
: all_inferiors ())
435 /* Note we don't check is_inferior here like above because we
436 need to handle 'is_ours_for_output -> is_ours' too. Careful
437 to never transition from 'is_ours' to 'is_ours_for_output',
439 if (inf
->terminal_state
!= target_terminal_state::is_ours
440 && inf
->terminal_state
!= desired_state
)
442 set_current_inferior (inf
);
443 if (desired_state
== target_terminal_state::is_ours
)
444 current_top_target ()->terminal_ours ();
445 else if (desired_state
== target_terminal_state::is_ours_for_output
)
446 current_top_target ()->terminal_ours_for_output ();
448 gdb_assert_not_reached ("unhandled desired state");
449 inf
->terminal_state
= desired_state
;
454 /* See target/target.h. */
457 target_terminal::ours ()
459 struct ui
*ui
= current_ui
;
461 /* See target_terminal::inferior. */
465 if (m_terminal_state
== target_terminal_state::is_ours
)
468 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
469 m_terminal_state
= target_terminal_state::is_ours
;
472 /* See target/target.h. */
475 target_terminal::ours_for_output ()
477 struct ui
*ui
= current_ui
;
479 /* See target_terminal::inferior. */
483 if (!target_terminal::is_inferior ())
486 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
487 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
490 /* See target/target.h. */
493 target_terminal::info (const char *arg
, int from_tty
)
495 current_top_target ()->terminal_info (arg
, from_tty
);
501 target_supports_terminal_ours (void)
503 /* The current top target is the target at the top of the target
504 stack of the current inferior. While normally there's always an
505 inferior, we must check for nullptr here because we can get here
506 very early during startup, before the initial inferior is first
508 inferior
*inf
= current_inferior ();
512 return inf
->top_target ()->supports_terminal_ours ();
518 error (_("You can't do that when your target is `%s'"),
519 current_top_target ()->shortname ());
525 error (_("You can't do that without a process to debug."));
529 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
531 printf_unfiltered (_("No saved terminal information.\n"));
534 /* A default implementation for the to_get_ada_task_ptid target method.
536 This function builds the PTID by using both LWP and TID as part of
537 the PTID lwp and tid elements. The pid used is the pid of the
541 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
543 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
546 static enum exec_direction_kind
547 default_execution_direction (struct target_ops
*self
)
549 if (!target_can_execute_reverse
)
551 else if (!target_can_async_p ())
554 gdb_assert_not_reached ("\
555 to_execution_direction must be implemented for reverse async");
561 decref_target (target_ops
*t
)
564 if (t
->refcount () == 0)
566 if (t
->stratum () == process_stratum
)
567 connection_list_remove (as_process_stratum_target (t
));
575 target_stack::push (target_ops
*t
)
579 strata stratum
= t
->stratum ();
581 if (stratum
== process_stratum
)
582 connection_list_add (as_process_stratum_target (t
));
584 /* If there's already a target at this stratum, remove it. */
586 if (m_stack
[stratum
] != NULL
)
587 unpush (m_stack
[stratum
]);
589 /* Now add the new one. */
590 m_stack
[stratum
] = t
;
599 push_target (struct target_ops
*t
)
601 current_inferior ()->push_target (t
);
607 push_target (target_ops_up
&&t
)
609 current_inferior ()->push_target (t
.get ());
616 unpush_target (struct target_ops
*t
)
618 return current_inferior ()->unpush_target (t
);
624 target_stack::unpush (target_ops
*t
)
626 gdb_assert (t
!= NULL
);
628 strata stratum
= t
->stratum ();
630 if (stratum
== dummy_stratum
)
631 internal_error (__FILE__
, __LINE__
,
632 _("Attempt to unpush the dummy target"));
634 /* Look for the specified target. Note that a target can only occur
635 once in the target stack. */
637 if (m_stack
[stratum
] != t
)
639 /* If T wasn't pushed, quit. Only open targets should be
644 /* Unchain the target. */
645 m_stack
[stratum
] = NULL
;
647 if (m_top
== stratum
)
648 m_top
= t
->beneath ()->stratum ();
650 /* Finally close the target, if there are no inferiors
651 referencing this target still. Note we do this after unchaining,
652 so any target method calls from within the target_close
653 implementation don't end up in T anymore. Do leave the target
654 open if we have are other inferiors referencing this target
661 /* Unpush TARGET and assert that it worked. */
664 unpush_target_and_assert (struct target_ops
*target
)
666 if (!unpush_target (target
))
668 fprintf_unfiltered (gdb_stderr
,
669 "pop_all_targets couldn't find target %s\n",
670 target
->shortname ());
671 internal_error (__FILE__
, __LINE__
,
672 _("failed internal consistency check"));
677 pop_all_targets_above (enum strata above_stratum
)
679 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
680 unpush_target_and_assert (current_top_target ());
686 pop_all_targets_at_and_above (enum strata stratum
)
688 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
689 unpush_target_and_assert (current_top_target ());
693 pop_all_targets (void)
695 pop_all_targets_above (dummy_stratum
);
698 /* Return true if T is now pushed in the current inferior's target
699 stack. Return false otherwise. */
702 target_is_pushed (target_ops
*t
)
704 return current_inferior ()->target_is_pushed (t
);
707 /* Default implementation of to_get_thread_local_address. */
710 generic_tls_error (void)
712 throw_error (TLS_GENERIC_ERROR
,
713 _("Cannot find thread-local variables on this target"));
716 /* Using the objfile specified in OBJFILE, find the address for the
717 current thread's thread-local storage with offset OFFSET. */
719 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
721 volatile CORE_ADDR addr
= 0;
722 struct target_ops
*target
= current_top_target ();
723 struct gdbarch
*gdbarch
= target_gdbarch ();
725 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
727 ptid_t ptid
= inferior_ptid
;
733 /* Fetch the load module address for this objfile. */
734 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
737 if (gdbarch_get_thread_local_address_p (gdbarch
))
738 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
741 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
743 /* If an error occurred, print TLS related messages here. Otherwise,
744 throw the error to some higher catcher. */
745 catch (const gdb_exception
&ex
)
747 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
751 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
752 error (_("Cannot find thread-local variables "
753 "in this thread library."));
755 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
756 if (objfile_is_library
)
757 error (_("Cannot find shared library `%s' in dynamic"
758 " linker's load module list"), objfile_name (objfile
));
760 error (_("Cannot find executable file `%s' in dynamic"
761 " linker's load module list"), objfile_name (objfile
));
763 case TLS_NOT_ALLOCATED_YET_ERROR
:
764 if (objfile_is_library
)
765 error (_("The inferior has not yet allocated storage for"
766 " thread-local variables in\n"
767 "the shared library `%s'\n"
769 objfile_name (objfile
),
770 target_pid_to_str (ptid
).c_str ());
772 error (_("The inferior has not yet allocated storage for"
773 " thread-local variables in\n"
774 "the executable `%s'\n"
776 objfile_name (objfile
),
777 target_pid_to_str (ptid
).c_str ());
779 case TLS_GENERIC_ERROR
:
780 if (objfile_is_library
)
781 error (_("Cannot find thread-local storage for %s, "
782 "shared library %s:\n%s"),
783 target_pid_to_str (ptid
).c_str (),
784 objfile_name (objfile
), ex
.what ());
786 error (_("Cannot find thread-local storage for %s, "
787 "executable file %s:\n%s"),
788 target_pid_to_str (ptid
).c_str (),
789 objfile_name (objfile
), ex
.what ());
798 error (_("Cannot find thread-local variables on this target"));
804 target_xfer_status_to_string (enum target_xfer_status status
)
806 #define CASE(X) case X: return #X
809 CASE(TARGET_XFER_E_IO
);
810 CASE(TARGET_XFER_UNAVAILABLE
);
819 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
821 /* target_read_string -- read a null terminated string, up to LEN bytes,
822 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
823 Set *STRING to a pointer to malloc'd memory containing the data; the caller
824 is responsible for freeing it. Return the number of bytes successfully
828 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
829 int len
, int *errnop
)
835 int buffer_allocated
;
837 unsigned int nbytes_read
= 0;
841 /* Small for testing. */
842 buffer_allocated
= 4;
843 buffer
= (char *) xmalloc (buffer_allocated
);
848 tlen
= MIN (len
, 4 - (memaddr
& 3));
849 offset
= memaddr
& 3;
851 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
854 /* The transfer request might have crossed the boundary to an
855 unallocated region of memory. Retry the transfer, requesting
859 errcode
= target_read_memory (memaddr
, buf
, 1);
864 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
868 bytes
= bufptr
- buffer
;
869 buffer_allocated
*= 2;
870 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
871 bufptr
= buffer
+ bytes
;
874 for (i
= 0; i
< tlen
; i
++)
876 *bufptr
++ = buf
[i
+ offset
];
877 if (buf
[i
+ offset
] == '\000')
879 nbytes_read
+= i
+ 1;
889 string
->reset (buffer
);
895 struct target_section_table
*
896 target_get_section_table (struct target_ops
*target
)
898 return target
->get_section_table ();
901 /* Find a section containing ADDR. */
903 struct target_section
*
904 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
906 struct target_section_table
*table
= target_get_section_table (target
);
907 struct target_section
*secp
;
912 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
914 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
921 /* Helper for the memory xfer routines. Checks the attributes of the
922 memory region of MEMADDR against the read or write being attempted.
923 If the access is permitted returns true, otherwise returns false.
924 REGION_P is an optional output parameter. If not-NULL, it is
925 filled with a pointer to the memory region of MEMADDR. REG_LEN
926 returns LEN trimmed to the end of the region. This is how much the
927 caller can continue requesting, if the access is permitted. A
928 single xfer request must not straddle memory region boundaries. */
931 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
932 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
933 struct mem_region
**region_p
)
935 struct mem_region
*region
;
937 region
= lookup_mem_region (memaddr
);
939 if (region_p
!= NULL
)
942 switch (region
->attrib
.mode
)
945 if (writebuf
!= NULL
)
955 /* We only support writing to flash during "load" for now. */
956 if (writebuf
!= NULL
)
957 error (_("Writing to flash memory forbidden in this context"));
964 /* region->hi == 0 means there's no upper bound. */
965 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
968 *reg_len
= region
->hi
- memaddr
;
973 /* Read memory from more than one valid target. A core file, for
974 instance, could have some of memory but delegate other bits to
975 the target below it. So, we must manually try all targets. */
977 enum target_xfer_status
978 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
979 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
980 ULONGEST
*xfered_len
)
982 enum target_xfer_status res
;
986 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
987 readbuf
, writebuf
, memaddr
, len
,
989 if (res
== TARGET_XFER_OK
)
992 /* Stop if the target reports that the memory is not available. */
993 if (res
== TARGET_XFER_UNAVAILABLE
)
996 /* We want to continue past core files to executables, but not
997 past a running target's memory. */
998 if (ops
->has_all_memory ())
1001 ops
= ops
->beneath ();
1003 while (ops
!= NULL
);
1005 /* The cache works at the raw memory level. Make sure the cache
1006 gets updated with raw contents no matter what kind of memory
1007 object was originally being written. Note we do write-through
1008 first, so that if it fails, we don't write to the cache contents
1009 that never made it to the target. */
1010 if (writebuf
!= NULL
1011 && inferior_ptid
!= null_ptid
1012 && target_dcache_init_p ()
1013 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1015 DCACHE
*dcache
= target_dcache_get ();
1017 /* Note that writing to an area of memory which wasn't present
1018 in the cache doesn't cause it to be loaded in. */
1019 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1025 /* Perform a partial memory transfer.
1026 For docs see target.h, to_xfer_partial. */
1028 static enum target_xfer_status
1029 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1030 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1031 ULONGEST len
, ULONGEST
*xfered_len
)
1033 enum target_xfer_status res
;
1035 struct mem_region
*region
;
1036 struct inferior
*inf
;
1038 /* For accesses to unmapped overlay sections, read directly from
1039 files. Must do this first, as MEMADDR may need adjustment. */
1040 if (readbuf
!= NULL
&& overlay_debugging
)
1042 struct obj_section
*section
= find_pc_overlay (memaddr
);
1044 if (pc_in_unmapped_range (memaddr
, section
))
1046 struct target_section_table
*table
1047 = target_get_section_table (ops
);
1048 const char *section_name
= section
->the_bfd_section
->name
;
1050 memaddr
= overlay_mapped_address (memaddr
, section
);
1051 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1052 memaddr
, len
, xfered_len
,
1054 table
->sections_end
,
1059 /* Try the executable files, if "trust-readonly-sections" is set. */
1060 if (readbuf
!= NULL
&& trust_readonly
)
1062 struct target_section
*secp
;
1063 struct target_section_table
*table
;
1065 secp
= target_section_by_addr (ops
, memaddr
);
1067 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1069 table
= target_get_section_table (ops
);
1070 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1071 memaddr
, len
, xfered_len
,
1073 table
->sections_end
,
1078 /* Try GDB's internal data cache. */
1080 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1082 return TARGET_XFER_E_IO
;
1084 if (inferior_ptid
!= null_ptid
)
1085 inf
= current_inferior ();
1091 /* The dcache reads whole cache lines; that doesn't play well
1092 with reading from a trace buffer, because reading outside of
1093 the collected memory range fails. */
1094 && get_traceframe_number () == -1
1095 && (region
->attrib
.cache
1096 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1097 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1099 DCACHE
*dcache
= target_dcache_get_or_init ();
1101 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1102 reg_len
, xfered_len
);
1105 /* If none of those methods found the memory we wanted, fall back
1106 to a target partial transfer. Normally a single call to
1107 to_xfer_partial is enough; if it doesn't recognize an object
1108 it will call the to_xfer_partial of the next target down.
1109 But for memory this won't do. Memory is the only target
1110 object which can be read from more than one valid target.
1111 A core file, for instance, could have some of memory but
1112 delegate other bits to the target below it. So, we must
1113 manually try all targets. */
1115 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1118 /* If we still haven't got anything, return the last error. We
1123 /* Perform a partial memory transfer. For docs see target.h,
1126 static enum target_xfer_status
1127 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1128 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1129 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1131 enum target_xfer_status res
;
1133 /* Zero length requests are ok and require no work. */
1135 return TARGET_XFER_EOF
;
1137 memaddr
= address_significant (target_gdbarch (), memaddr
);
1139 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1140 breakpoint insns, thus hiding out from higher layers whether
1141 there are software breakpoints inserted in the code stream. */
1142 if (readbuf
!= NULL
)
1144 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1147 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1148 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1152 /* A large write request is likely to be partially satisfied
1153 by memory_xfer_partial_1. We will continually malloc
1154 and free a copy of the entire write request for breakpoint
1155 shadow handling even though we only end up writing a small
1156 subset of it. Cap writes to a limit specified by the target
1157 to mitigate this. */
1158 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1160 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1161 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1162 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1169 scoped_restore_tmpl
<int>
1170 make_scoped_restore_show_memory_breakpoints (int show
)
1172 return make_scoped_restore (&show_memory_breakpoints
, show
);
1175 /* For docs see target.h, to_xfer_partial. */
1177 enum target_xfer_status
1178 target_xfer_partial (struct target_ops
*ops
,
1179 enum target_object object
, const char *annex
,
1180 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1181 ULONGEST offset
, ULONGEST len
,
1182 ULONGEST
*xfered_len
)
1184 enum target_xfer_status retval
;
1186 /* Transfer is done when LEN is zero. */
1188 return TARGET_XFER_EOF
;
1190 if (writebuf
&& !may_write_memory
)
1191 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1192 core_addr_to_string_nz (offset
), plongest (len
));
1196 /* If this is a memory transfer, let the memory-specific code
1197 have a look at it instead. Memory transfers are more
1199 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1200 || object
== TARGET_OBJECT_CODE_MEMORY
)
1201 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1202 writebuf
, offset
, len
, xfered_len
);
1203 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1205 /* Skip/avoid accessing the target if the memory region
1206 attributes block the access. Check this here instead of in
1207 raw_memory_xfer_partial as otherwise we'd end up checking
1208 this twice in the case of the memory_xfer_partial path is
1209 taken; once before checking the dcache, and another in the
1210 tail call to raw_memory_xfer_partial. */
1211 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1213 return TARGET_XFER_E_IO
;
1215 /* Request the normal memory object from other layers. */
1216 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1220 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1221 writebuf
, offset
, len
, xfered_len
);
1225 const unsigned char *myaddr
= NULL
;
1227 fprintf_unfiltered (gdb_stdlog
,
1228 "%s:target_xfer_partial "
1229 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1232 (annex
? annex
: "(null)"),
1233 host_address_to_string (readbuf
),
1234 host_address_to_string (writebuf
),
1235 core_addr_to_string_nz (offset
),
1236 pulongest (len
), retval
,
1237 pulongest (*xfered_len
));
1243 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1247 fputs_unfiltered (", bytes =", gdb_stdlog
);
1248 for (i
= 0; i
< *xfered_len
; i
++)
1250 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1252 if (targetdebug
< 2 && i
> 0)
1254 fprintf_unfiltered (gdb_stdlog
, " ...");
1257 fprintf_unfiltered (gdb_stdlog
, "\n");
1260 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1264 fputc_unfiltered ('\n', gdb_stdlog
);
1267 /* Check implementations of to_xfer_partial update *XFERED_LEN
1268 properly. Do assertion after printing debug messages, so that we
1269 can find more clues on assertion failure from debugging messages. */
1270 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1271 gdb_assert (*xfered_len
> 0);
1276 /* Read LEN bytes of target memory at address MEMADDR, placing the
1277 results in GDB's memory at MYADDR. Returns either 0 for success or
1278 -1 if any error occurs.
1280 If an error occurs, no guarantee is made about the contents of the data at
1281 MYADDR. In particular, the caller should not depend upon partial reads
1282 filling the buffer with good data. There is no way for the caller to know
1283 how much good data might have been transfered anyway. Callers that can
1284 deal with partial reads should call target_read (which will retry until
1285 it makes no progress, and then return how much was transferred). */
1288 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1290 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1291 myaddr
, memaddr
, len
) == len
)
1297 /* See target/target.h. */
1300 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1305 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1308 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1309 gdbarch_byte_order (target_gdbarch ()));
1313 /* Like target_read_memory, but specify explicitly that this is a read
1314 from the target's raw memory. That is, this read bypasses the
1315 dcache, breakpoint shadowing, etc. */
1318 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1320 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1321 myaddr
, memaddr
, len
) == len
)
1327 /* Like target_read_memory, but specify explicitly that this is a read from
1328 the target's stack. This may trigger different cache behavior. */
1331 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1333 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1334 myaddr
, memaddr
, len
) == len
)
1340 /* Like target_read_memory, but specify explicitly that this is a read from
1341 the target's code. This may trigger different cache behavior. */
1344 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1346 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1347 myaddr
, memaddr
, len
) == len
)
1353 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1354 Returns either 0 for success or -1 if any error occurs. If an
1355 error occurs, no guarantee is made about how much data got written.
1356 Callers that can deal with partial writes should call
1360 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1362 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1363 myaddr
, memaddr
, len
) == len
)
1369 /* Write LEN bytes from MYADDR to target raw memory at address
1370 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1371 If an error occurs, no guarantee is made about how much data got
1372 written. Callers that can deal with partial writes should call
1376 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1378 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1379 myaddr
, memaddr
, len
) == len
)
1385 /* Fetch the target's memory map. */
1387 std::vector
<mem_region
>
1388 target_memory_map (void)
1390 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1391 if (result
.empty ())
1394 std::sort (result
.begin (), result
.end ());
1396 /* Check that regions do not overlap. Simultaneously assign
1397 a numbering for the "mem" commands to use to refer to
1399 mem_region
*last_one
= NULL
;
1400 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1402 mem_region
*this_one
= &result
[ix
];
1403 this_one
->number
= ix
;
1405 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1407 warning (_("Overlapping regions in memory map: ignoring"));
1408 return std::vector
<mem_region
> ();
1411 last_one
= this_one
;
1418 target_flash_erase (ULONGEST address
, LONGEST length
)
1420 current_top_target ()->flash_erase (address
, length
);
1424 target_flash_done (void)
1426 current_top_target ()->flash_done ();
1430 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1431 struct cmd_list_element
*c
, const char *value
)
1433 fprintf_filtered (file
,
1434 _("Mode for reading from readonly sections is %s.\n"),
1438 /* Target vector read/write partial wrapper functions. */
1440 static enum target_xfer_status
1441 target_read_partial (struct target_ops
*ops
,
1442 enum target_object object
,
1443 const char *annex
, gdb_byte
*buf
,
1444 ULONGEST offset
, ULONGEST len
,
1445 ULONGEST
*xfered_len
)
1447 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1451 static enum target_xfer_status
1452 target_write_partial (struct target_ops
*ops
,
1453 enum target_object object
,
1454 const char *annex
, const gdb_byte
*buf
,
1455 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1457 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1461 /* Wrappers to perform the full transfer. */
1463 /* For docs on target_read see target.h. */
1466 target_read (struct target_ops
*ops
,
1467 enum target_object object
,
1468 const char *annex
, gdb_byte
*buf
,
1469 ULONGEST offset
, LONGEST len
)
1471 LONGEST xfered_total
= 0;
1474 /* If we are reading from a memory object, find the length of an addressable
1475 unit for that architecture. */
1476 if (object
== TARGET_OBJECT_MEMORY
1477 || object
== TARGET_OBJECT_STACK_MEMORY
1478 || object
== TARGET_OBJECT_CODE_MEMORY
1479 || object
== TARGET_OBJECT_RAW_MEMORY
)
1480 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1482 while (xfered_total
< len
)
1484 ULONGEST xfered_partial
;
1485 enum target_xfer_status status
;
1487 status
= target_read_partial (ops
, object
, annex
,
1488 buf
+ xfered_total
* unit_size
,
1489 offset
+ xfered_total
, len
- xfered_total
,
1492 /* Call an observer, notifying them of the xfer progress? */
1493 if (status
== TARGET_XFER_EOF
)
1494 return xfered_total
;
1495 else if (status
== TARGET_XFER_OK
)
1497 xfered_total
+= xfered_partial
;
1501 return TARGET_XFER_E_IO
;
1507 /* Assuming that the entire [begin, end) range of memory cannot be
1508 read, try to read whatever subrange is possible to read.
1510 The function returns, in RESULT, either zero or one memory block.
1511 If there's a readable subrange at the beginning, it is completely
1512 read and returned. Any further readable subrange will not be read.
1513 Otherwise, if there's a readable subrange at the end, it will be
1514 completely read and returned. Any readable subranges before it
1515 (obviously, not starting at the beginning), will be ignored. In
1516 other cases -- either no readable subrange, or readable subrange(s)
1517 that is neither at the beginning, or end, nothing is returned.
1519 The purpose of this function is to handle a read across a boundary
1520 of accessible memory in a case when memory map is not available.
1521 The above restrictions are fine for this case, but will give
1522 incorrect results if the memory is 'patchy'. However, supporting
1523 'patchy' memory would require trying to read every single byte,
1524 and it seems unacceptable solution. Explicit memory map is
1525 recommended for this case -- and target_read_memory_robust will
1526 take care of reading multiple ranges then. */
1529 read_whatever_is_readable (struct target_ops
*ops
,
1530 const ULONGEST begin
, const ULONGEST end
,
1532 std::vector
<memory_read_result
> *result
)
1534 ULONGEST current_begin
= begin
;
1535 ULONGEST current_end
= end
;
1537 ULONGEST xfered_len
;
1539 /* If we previously failed to read 1 byte, nothing can be done here. */
1540 if (end
- begin
<= 1)
1543 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1545 /* Check that either first or the last byte is readable, and give up
1546 if not. This heuristic is meant to permit reading accessible memory
1547 at the boundary of accessible region. */
1548 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1549 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1554 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1555 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1556 &xfered_len
) == TARGET_XFER_OK
)
1564 /* Loop invariant is that the [current_begin, current_end) was previously
1565 found to be not readable as a whole.
1567 Note loop condition -- if the range has 1 byte, we can't divide the range
1568 so there's no point trying further. */
1569 while (current_end
- current_begin
> 1)
1571 ULONGEST first_half_begin
, first_half_end
;
1572 ULONGEST second_half_begin
, second_half_end
;
1574 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1578 first_half_begin
= current_begin
;
1579 first_half_end
= middle
;
1580 second_half_begin
= middle
;
1581 second_half_end
= current_end
;
1585 first_half_begin
= middle
;
1586 first_half_end
= current_end
;
1587 second_half_begin
= current_begin
;
1588 second_half_end
= middle
;
1591 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1592 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1594 first_half_end
- first_half_begin
);
1596 if (xfer
== first_half_end
- first_half_begin
)
1598 /* This half reads up fine. So, the error must be in the
1600 current_begin
= second_half_begin
;
1601 current_end
= second_half_end
;
1605 /* This half is not readable. Because we've tried one byte, we
1606 know some part of this half if actually readable. Go to the next
1607 iteration to divide again and try to read.
1609 We don't handle the other half, because this function only tries
1610 to read a single readable subrange. */
1611 current_begin
= first_half_begin
;
1612 current_end
= first_half_end
;
1618 /* The [begin, current_begin) range has been read. */
1619 result
->emplace_back (begin
, current_end
, std::move (buf
));
1623 /* The [current_end, end) range has been read. */
1624 LONGEST region_len
= end
- current_end
;
1626 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1627 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1628 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1629 region_len
* unit_size
);
1630 result
->emplace_back (current_end
, end
, std::move (data
));
1634 std::vector
<memory_read_result
>
1635 read_memory_robust (struct target_ops
*ops
,
1636 const ULONGEST offset
, const LONGEST len
)
1638 std::vector
<memory_read_result
> result
;
1639 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1641 LONGEST xfered_total
= 0;
1642 while (xfered_total
< len
)
1644 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1647 /* If there is no explicit region, a fake one should be created. */
1648 gdb_assert (region
);
1650 if (region
->hi
== 0)
1651 region_len
= len
- xfered_total
;
1653 region_len
= region
->hi
- offset
;
1655 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1657 /* Cannot read this region. Note that we can end up here only
1658 if the region is explicitly marked inaccessible, or
1659 'inaccessible-by-default' is in effect. */
1660 xfered_total
+= region_len
;
1664 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1665 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1666 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1668 LONGEST xfered_partial
=
1669 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1670 offset
+ xfered_total
, to_read
);
1671 /* Call an observer, notifying them of the xfer progress? */
1672 if (xfered_partial
<= 0)
1674 /* Got an error reading full chunk. See if maybe we can read
1676 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1677 offset
+ xfered_total
+ to_read
,
1678 unit_size
, &result
);
1679 xfered_total
+= to_read
;
1683 result
.emplace_back (offset
+ xfered_total
,
1684 offset
+ xfered_total
+ xfered_partial
,
1685 std::move (buffer
));
1686 xfered_total
+= xfered_partial
;
1696 /* An alternative to target_write with progress callbacks. */
1699 target_write_with_progress (struct target_ops
*ops
,
1700 enum target_object object
,
1701 const char *annex
, const gdb_byte
*buf
,
1702 ULONGEST offset
, LONGEST len
,
1703 void (*progress
) (ULONGEST
, void *), void *baton
)
1705 LONGEST xfered_total
= 0;
1708 /* If we are writing to a memory object, find the length of an addressable
1709 unit for that architecture. */
1710 if (object
== TARGET_OBJECT_MEMORY
1711 || object
== TARGET_OBJECT_STACK_MEMORY
1712 || object
== TARGET_OBJECT_CODE_MEMORY
1713 || object
== TARGET_OBJECT_RAW_MEMORY
)
1714 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1716 /* Give the progress callback a chance to set up. */
1718 (*progress
) (0, baton
);
1720 while (xfered_total
< len
)
1722 ULONGEST xfered_partial
;
1723 enum target_xfer_status status
;
1725 status
= target_write_partial (ops
, object
, annex
,
1726 buf
+ xfered_total
* unit_size
,
1727 offset
+ xfered_total
, len
- xfered_total
,
1730 if (status
!= TARGET_XFER_OK
)
1731 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1734 (*progress
) (xfered_partial
, baton
);
1736 xfered_total
+= xfered_partial
;
1742 /* For docs on target_write see target.h. */
1745 target_write (struct target_ops
*ops
,
1746 enum target_object object
,
1747 const char *annex
, const gdb_byte
*buf
,
1748 ULONGEST offset
, LONGEST len
)
1750 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1754 /* Help for target_read_alloc and target_read_stralloc. See their comments
1757 template <typename T
>
1758 gdb::optional
<gdb::def_vector
<T
>>
1759 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1762 gdb::def_vector
<T
> buf
;
1764 const int chunk
= 4096;
1766 /* This function does not have a length parameter; it reads the
1767 entire OBJECT). Also, it doesn't support objects fetched partly
1768 from one target and partly from another (in a different stratum,
1769 e.g. a core file and an executable). Both reasons make it
1770 unsuitable for reading memory. */
1771 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1773 /* Start by reading up to 4K at a time. The target will throttle
1774 this number down if necessary. */
1777 ULONGEST xfered_len
;
1778 enum target_xfer_status status
;
1780 buf
.resize (buf_pos
+ chunk
);
1782 status
= target_read_partial (ops
, object
, annex
,
1783 (gdb_byte
*) &buf
[buf_pos
],
1787 if (status
== TARGET_XFER_EOF
)
1789 /* Read all there was. */
1790 buf
.resize (buf_pos
);
1793 else if (status
!= TARGET_XFER_OK
)
1795 /* An error occurred. */
1799 buf_pos
+= xfered_len
;
1807 gdb::optional
<gdb::byte_vector
>
1808 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1811 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1816 gdb::optional
<gdb::char_vector
>
1817 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1820 gdb::optional
<gdb::char_vector
> buf
1821 = target_read_alloc_1
<char> (ops
, object
, annex
);
1826 if (buf
->empty () || buf
->back () != '\0')
1827 buf
->push_back ('\0');
1829 /* Check for embedded NUL bytes; but allow trailing NULs. */
1830 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1831 it
!= buf
->end (); it
++)
1834 warning (_("target object %d, annex %s, "
1835 "contained unexpected null characters"),
1836 (int) object
, annex
? annex
: "(none)");
1843 /* Memory transfer methods. */
1846 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1849 /* This method is used to read from an alternate, non-current
1850 target. This read must bypass the overlay support (as symbols
1851 don't match this target), and GDB's internal cache (wrong cache
1852 for this target). */
1853 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1855 memory_error (TARGET_XFER_E_IO
, addr
);
1859 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1860 int len
, enum bfd_endian byte_order
)
1862 gdb_byte buf
[sizeof (ULONGEST
)];
1864 gdb_assert (len
<= sizeof (buf
));
1865 get_target_memory (ops
, addr
, buf
, len
);
1866 return extract_unsigned_integer (buf
, len
, byte_order
);
1872 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1873 struct bp_target_info
*bp_tgt
)
1875 if (!may_insert_breakpoints
)
1877 warning (_("May not insert breakpoints"));
1881 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1887 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1888 struct bp_target_info
*bp_tgt
,
1889 enum remove_bp_reason reason
)
1891 /* This is kind of a weird case to handle, but the permission might
1892 have been changed after breakpoints were inserted - in which case
1893 we should just take the user literally and assume that any
1894 breakpoints should be left in place. */
1895 if (!may_insert_breakpoints
)
1897 warning (_("May not remove breakpoints"));
1901 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1905 info_target_command (const char *args
, int from_tty
)
1907 int has_all_mem
= 0;
1909 if (symfile_objfile
!= NULL
)
1910 printf_unfiltered (_("Symbols from \"%s\".\n"),
1911 objfile_name (symfile_objfile
));
1913 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1915 if (!t
->has_memory ())
1918 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1921 printf_unfiltered (_("\tWhile running this, "
1922 "GDB does not access memory from...\n"));
1923 printf_unfiltered ("%s:\n", t
->longname ());
1925 has_all_mem
= t
->has_all_memory ();
1929 /* This function is called before any new inferior is created, e.g.
1930 by running a program, attaching, or connecting to a target.
1931 It cleans up any state from previous invocations which might
1932 change between runs. This is a subset of what target_preopen
1933 resets (things which might change between targets). */
1936 target_pre_inferior (int from_tty
)
1938 /* Clear out solib state. Otherwise the solib state of the previous
1939 inferior might have survived and is entirely wrong for the new
1940 target. This has been observed on GNU/Linux using glibc 2.3. How
1952 Cannot access memory at address 0xdeadbeef
1955 /* In some OSs, the shared library list is the same/global/shared
1956 across inferiors. If code is shared between processes, so are
1957 memory regions and features. */
1958 if (!gdbarch_has_global_solist (target_gdbarch ()))
1960 no_shared_libraries (NULL
, from_tty
);
1962 invalidate_target_mem_regions ();
1964 target_clear_description ();
1967 /* attach_flag may be set if the previous process associated with
1968 the inferior was attached to. */
1969 current_inferior ()->attach_flag
= 0;
1971 current_inferior ()->highest_thread_num
= 0;
1973 agent_capability_invalidate ();
1976 /* This is to be called by the open routine before it does
1980 target_preopen (int from_tty
)
1984 if (current_inferior ()->pid
!= 0)
1987 || !target_has_execution
1988 || query (_("A program is being debugged already. Kill it? ")))
1990 /* Core inferiors actually should be detached, not
1992 if (target_has_execution
)
1995 target_detach (current_inferior (), 0);
1998 error (_("Program not killed."));
2001 /* Calling target_kill may remove the target from the stack. But if
2002 it doesn't (which seems like a win for UDI), remove it now. */
2003 /* Leave the exec target, though. The user may be switching from a
2004 live process to a core of the same program. */
2005 pop_all_targets_above (file_stratum
);
2007 target_pre_inferior (from_tty
);
2013 target_detach (inferior
*inf
, int from_tty
)
2015 /* After we have detached, we will clear the register cache for this inferior
2016 by calling registers_changed_ptid. We must save the pid_ptid before
2017 detaching, as the target detach method will clear inf->pid. */
2018 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2020 /* As long as some to_detach implementations rely on the current_inferior
2021 (either directly, or indirectly, like through target_gdbarch or by
2022 reading memory), INF needs to be the current inferior. When that
2023 requirement will become no longer true, then we can remove this
2025 gdb_assert (inf
== current_inferior ());
2027 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2028 /* Don't remove global breakpoints here. They're removed on
2029 disconnection from the target. */
2032 /* If we're in breakpoints-always-inserted mode, have to remove
2033 breakpoints before detaching. */
2034 remove_breakpoints_inf (current_inferior ());
2036 prepare_for_detach ();
2038 /* Hold a strong reference because detaching may unpush the
2040 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2042 current_top_target ()->detach (inf
, from_tty
);
2044 process_stratum_target
*proc_target
2045 = as_process_stratum_target (proc_target_ref
.get ());
2047 registers_changed_ptid (proc_target
, save_pid_ptid
);
2049 /* We have to ensure we have no frame cache left. Normally,
2050 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2051 inferior_ptid matches save_pid_ptid, but in our case, it does not
2052 call it, as inferior_ptid has been reset. */
2053 reinit_frame_cache ();
2057 target_disconnect (const char *args
, int from_tty
)
2059 /* If we're in breakpoints-always-inserted mode or if breakpoints
2060 are global across processes, we have to remove them before
2062 remove_breakpoints ();
2064 current_top_target ()->disconnect (args
, from_tty
);
2067 /* See target/target.h. */
2070 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2072 return current_top_target ()->wait (ptid
, status
, options
);
2078 default_target_wait (struct target_ops
*ops
,
2079 ptid_t ptid
, struct target_waitstatus
*status
,
2082 status
->kind
= TARGET_WAITKIND_IGNORE
;
2083 return minus_one_ptid
;
2087 target_pid_to_str (ptid_t ptid
)
2089 return current_top_target ()->pid_to_str (ptid
);
2093 target_thread_name (struct thread_info
*info
)
2095 gdb_assert (info
->inf
== current_inferior ());
2097 return current_top_target ()->thread_name (info
);
2100 struct thread_info
*
2101 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2103 struct inferior
*inf
)
2105 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2112 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2114 return current_top_target ()->thread_info_to_thread_handle (tip
);
2118 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2120 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2122 target_dcache_invalidate ();
2124 current_top_target ()->resume (ptid
, step
, signal
);
2126 registers_changed_ptid (curr_target
, ptid
);
2127 /* We only set the internal executing state here. The user/frontend
2128 running state is set at a higher level. This also clears the
2129 thread's stop_pc as side effect. */
2130 set_executing (curr_target
, ptid
, 1);
2131 clear_inline_frame_state (curr_target
, ptid
);
2134 /* If true, target_commit_resume is a nop. */
2135 static int defer_target_commit_resume
;
2140 target_commit_resume (void)
2142 if (defer_target_commit_resume
)
2145 current_top_target ()->commit_resume ();
2150 scoped_restore_tmpl
<int>
2151 make_scoped_defer_target_commit_resume ()
2153 return make_scoped_restore (&defer_target_commit_resume
, 1);
2157 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2159 current_top_target ()->pass_signals (pass_signals
);
2163 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2165 current_top_target ()->program_signals (program_signals
);
2169 default_follow_fork (struct target_ops
*self
, int follow_child
,
2172 /* Some target returned a fork event, but did not know how to follow it. */
2173 internal_error (__FILE__
, __LINE__
,
2174 _("could not find a target to follow fork"));
2177 /* Look through the list of possible targets for a target that can
2181 target_follow_fork (int follow_child
, int detach_fork
)
2183 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2186 /* Target wrapper for follow exec hook. */
2189 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2191 current_top_target ()->follow_exec (inf
, execd_pathname
);
2195 default_mourn_inferior (struct target_ops
*self
)
2197 internal_error (__FILE__
, __LINE__
,
2198 _("could not find a target to follow mourn inferior"));
2202 target_mourn_inferior (ptid_t ptid
)
2204 gdb_assert (ptid
== inferior_ptid
);
2205 current_top_target ()->mourn_inferior ();
2207 /* We no longer need to keep handles on any of the object files.
2208 Make sure to release them to avoid unnecessarily locking any
2209 of them while we're not actually debugging. */
2210 bfd_cache_close_all ();
2213 /* Look for a target which can describe architectural features, starting
2214 from TARGET. If we find one, return its description. */
2216 const struct target_desc
*
2217 target_read_description (struct target_ops
*target
)
2219 return target
->read_description ();
2222 /* This implements a basic search of memory, reading target memory and
2223 performing the search here (as opposed to performing the search in on the
2224 target side with, for example, gdbserver). */
2227 simple_search_memory (struct target_ops
*ops
,
2228 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2229 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2230 CORE_ADDR
*found_addrp
)
2232 /* NOTE: also defined in find.c testcase. */
2233 #define SEARCH_CHUNK_SIZE 16000
2234 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2235 /* Buffer to hold memory contents for searching. */
2236 unsigned search_buf_size
;
2238 search_buf_size
= chunk_size
+ pattern_len
- 1;
2240 /* No point in trying to allocate a buffer larger than the search space. */
2241 if (search_space_len
< search_buf_size
)
2242 search_buf_size
= search_space_len
;
2244 gdb::byte_vector
search_buf (search_buf_size
);
2246 /* Prime the search buffer. */
2248 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2249 search_buf
.data (), start_addr
, search_buf_size
)
2252 warning (_("Unable to access %s bytes of target "
2253 "memory at %s, halting search."),
2254 pulongest (search_buf_size
), hex_string (start_addr
));
2258 /* Perform the search.
2260 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2261 When we've scanned N bytes we copy the trailing bytes to the start and
2262 read in another N bytes. */
2264 while (search_space_len
>= pattern_len
)
2266 gdb_byte
*found_ptr
;
2267 unsigned nr_search_bytes
2268 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2270 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2271 pattern
, pattern_len
);
2273 if (found_ptr
!= NULL
)
2275 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2277 *found_addrp
= found_addr
;
2281 /* Not found in this chunk, skip to next chunk. */
2283 /* Don't let search_space_len wrap here, it's unsigned. */
2284 if (search_space_len
>= chunk_size
)
2285 search_space_len
-= chunk_size
;
2287 search_space_len
= 0;
2289 if (search_space_len
>= pattern_len
)
2291 unsigned keep_len
= search_buf_size
- chunk_size
;
2292 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2295 /* Copy the trailing part of the previous iteration to the front
2296 of the buffer for the next iteration. */
2297 gdb_assert (keep_len
== pattern_len
- 1);
2298 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2300 nr_to_read
= std::min (search_space_len
- keep_len
,
2301 (ULONGEST
) chunk_size
);
2303 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2304 &search_buf
[keep_len
], read_addr
,
2305 nr_to_read
) != nr_to_read
)
2307 warning (_("Unable to access %s bytes of target "
2308 "memory at %s, halting search."),
2309 plongest (nr_to_read
),
2310 hex_string (read_addr
));
2314 start_addr
+= chunk_size
;
2323 /* Default implementation of memory-searching. */
2326 default_search_memory (struct target_ops
*self
,
2327 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2328 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2329 CORE_ADDR
*found_addrp
)
2331 /* Start over from the top of the target stack. */
2332 return simple_search_memory (current_top_target (),
2333 start_addr
, search_space_len
,
2334 pattern
, pattern_len
, found_addrp
);
2337 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2338 sequence of bytes in PATTERN with length PATTERN_LEN.
2340 The result is 1 if found, 0 if not found, and -1 if there was an error
2341 requiring halting of the search (e.g. memory read error).
2342 If the pattern is found the address is recorded in FOUND_ADDRP. */
2345 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2346 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2347 CORE_ADDR
*found_addrp
)
2349 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2350 pattern
, pattern_len
, found_addrp
);
2353 /* Look through the currently pushed targets. If none of them will
2354 be able to restart the currently running process, issue an error
2358 target_require_runnable (void)
2360 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2362 /* If this target knows how to create a new program, then
2363 assume we will still be able to after killing the current
2364 one. Either killing and mourning will not pop T, or else
2365 find_default_run_target will find it again. */
2366 if (t
->can_create_inferior ())
2369 /* Do not worry about targets at certain strata that can not
2370 create inferiors. Assume they will be pushed again if
2371 necessary, and continue to the process_stratum. */
2372 if (t
->stratum () > process_stratum
)
2375 error (_("The \"%s\" target does not support \"run\". "
2376 "Try \"help target\" or \"continue\"."),
2380 /* This function is only called if the target is running. In that
2381 case there should have been a process_stratum target and it
2382 should either know how to create inferiors, or not... */
2383 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2386 /* Whether GDB is allowed to fall back to the default run target for
2387 "run", "attach", etc. when no target is connected yet. */
2388 static bool auto_connect_native_target
= true;
2391 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2392 struct cmd_list_element
*c
, const char *value
)
2394 fprintf_filtered (file
,
2395 _("Whether GDB may automatically connect to the "
2396 "native target is %s.\n"),
2400 /* A pointer to the target that can respond to "run" or "attach".
2401 Native targets are always singletons and instantiated early at GDB
2403 static target_ops
*the_native_target
;
2408 set_native_target (target_ops
*target
)
2410 if (the_native_target
!= NULL
)
2411 internal_error (__FILE__
, __LINE__
,
2412 _("native target already set (\"%s\")."),
2413 the_native_target
->longname ());
2415 the_native_target
= target
;
2421 get_native_target ()
2423 return the_native_target
;
2426 /* Look through the list of possible targets for a target that can
2427 execute a run or attach command without any other data. This is
2428 used to locate the default process stratum.
2430 If DO_MESG is not NULL, the result is always valid (error() is
2431 called for errors); else, return NULL on error. */
2433 static struct target_ops
*
2434 find_default_run_target (const char *do_mesg
)
2436 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2437 return the_native_target
;
2439 if (do_mesg
!= NULL
)
2440 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2447 find_attach_target (void)
2449 /* If a target on the current stack can attach, use it. */
2450 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2452 if (t
->can_attach ())
2456 /* Otherwise, use the default run target for attaching. */
2457 return find_default_run_target ("attach");
2463 find_run_target (void)
2465 /* If a target on the current stack can run, use it. */
2466 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2468 if (t
->can_create_inferior ())
2472 /* Otherwise, use the default run target. */
2473 return find_default_run_target ("run");
2477 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2482 /* Implement the "info proc" command. */
2485 target_info_proc (const char *args
, enum info_proc_what what
)
2487 struct target_ops
*t
;
2489 /* If we're already connected to something that can get us OS
2490 related data, use it. Otherwise, try using the native
2492 t
= find_target_at (process_stratum
);
2494 t
= find_default_run_target (NULL
);
2496 for (; t
!= NULL
; t
= t
->beneath ())
2498 if (t
->info_proc (args
, what
))
2501 fprintf_unfiltered (gdb_stdlog
,
2502 "target_info_proc (\"%s\", %d)\n", args
, what
);
2512 find_default_supports_disable_randomization (struct target_ops
*self
)
2514 struct target_ops
*t
;
2516 t
= find_default_run_target (NULL
);
2518 return t
->supports_disable_randomization ();
2523 target_supports_disable_randomization (void)
2525 return current_top_target ()->supports_disable_randomization ();
2528 /* See target/target.h. */
2531 target_supports_multi_process (void)
2533 return current_top_target ()->supports_multi_process ();
2538 gdb::optional
<gdb::char_vector
>
2539 target_get_osdata (const char *type
)
2541 struct target_ops
*t
;
2543 /* If we're already connected to something that can get us OS
2544 related data, use it. Otherwise, try using the native
2546 t
= find_target_at (process_stratum
);
2548 t
= find_default_run_target ("get OS data");
2553 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2556 /* Determine the current address space of thread PTID. */
2558 struct address_space
*
2559 target_thread_address_space (ptid_t ptid
)
2561 struct address_space
*aspace
;
2563 aspace
= current_top_target ()->thread_address_space (ptid
);
2564 gdb_assert (aspace
!= NULL
);
2572 target_ops::beneath () const
2574 return current_inferior ()->find_target_beneath (this);
2578 target_ops::close ()
2583 target_ops::can_attach ()
2589 target_ops::attach (const char *, int)
2591 gdb_assert_not_reached ("target_ops::attach called");
2595 target_ops::can_create_inferior ()
2601 target_ops::create_inferior (const char *, const std::string
&,
2604 gdb_assert_not_reached ("target_ops::create_inferior called");
2608 target_ops::can_run ()
2616 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2625 /* Target file operations. */
2627 static struct target_ops
*
2628 default_fileio_target (void)
2630 struct target_ops
*t
;
2632 /* If we're already connected to something that can perform
2633 file I/O, use it. Otherwise, try using the native target. */
2634 t
= find_target_at (process_stratum
);
2637 return find_default_run_target ("file I/O");
2640 /* File handle for target file operations. */
2644 /* The target on which this file is open. NULL if the target is
2645 meanwhile closed while the handle is open. */
2648 /* The file descriptor on the target. */
2651 /* Check whether this fileio_fh_t represents a closed file. */
2654 return target_fd
< 0;
2658 /* Vector of currently open file handles. The value returned by
2659 target_fileio_open and passed as the FD argument to other
2660 target_fileio_* functions is an index into this vector. This
2661 vector's entries are never freed; instead, files are marked as
2662 closed, and the handle becomes available for reuse. */
2663 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2665 /* Index into fileio_fhandles of the lowest handle that might be
2666 closed. This permits handle reuse without searching the whole
2667 list each time a new file is opened. */
2668 static int lowest_closed_fd
;
2670 /* Invalidate the target associated with open handles that were open
2671 on target TARG, since we're about to close (and maybe destroy) the
2672 target. The handles remain open from the client's perspective, but
2673 trying to do anything with them other than closing them will fail
2677 fileio_handles_invalidate_target (target_ops
*targ
)
2679 for (fileio_fh_t
&fh
: fileio_fhandles
)
2680 if (fh
.target
== targ
)
2684 /* Acquire a target fileio file descriptor. */
2687 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2689 /* Search for closed handles to reuse. */
2690 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2692 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2694 if (fh
.is_closed ())
2698 /* Push a new handle if no closed handles were found. */
2699 if (lowest_closed_fd
== fileio_fhandles
.size ())
2700 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2702 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2704 /* Should no longer be marked closed. */
2705 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2707 /* Return its index, and start the next lookup at
2709 return lowest_closed_fd
++;
2712 /* Release a target fileio file descriptor. */
2715 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2718 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2721 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2723 static fileio_fh_t
*
2724 fileio_fd_to_fh (int fd
)
2726 return &fileio_fhandles
[fd
];
2730 /* Default implementations of file i/o methods. We don't want these
2731 to delegate automatically, because we need to know which target
2732 supported the method, in order to call it directly from within
2733 pread/pwrite, etc. */
2736 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2737 int flags
, int mode
, int warn_if_slow
,
2740 *target_errno
= FILEIO_ENOSYS
;
2745 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2746 ULONGEST offset
, int *target_errno
)
2748 *target_errno
= FILEIO_ENOSYS
;
2753 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2754 ULONGEST offset
, int *target_errno
)
2756 *target_errno
= FILEIO_ENOSYS
;
2761 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2763 *target_errno
= FILEIO_ENOSYS
;
2768 target_ops::fileio_close (int fd
, int *target_errno
)
2770 *target_errno
= FILEIO_ENOSYS
;
2775 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2778 *target_errno
= FILEIO_ENOSYS
;
2782 gdb::optional
<std::string
>
2783 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2786 *target_errno
= FILEIO_ENOSYS
;
2790 /* Helper for target_fileio_open and
2791 target_fileio_open_warn_if_slow. */
2794 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2795 int flags
, int mode
, int warn_if_slow
,
2798 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2800 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2801 warn_if_slow
, target_errno
);
2803 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2809 fd
= acquire_fileio_fd (t
, fd
);
2812 fprintf_unfiltered (gdb_stdlog
,
2813 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2815 inf
== NULL
? 0 : inf
->num
,
2816 filename
, flags
, mode
,
2818 fd
!= -1 ? 0 : *target_errno
);
2822 *target_errno
= FILEIO_ENOSYS
;
2829 target_fileio_open (struct inferior
*inf
, const char *filename
,
2830 int flags
, int mode
, int *target_errno
)
2832 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2839 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2840 const char *filename
,
2841 int flags
, int mode
, int *target_errno
)
2843 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2850 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2851 ULONGEST offset
, int *target_errno
)
2853 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2856 if (fh
->is_closed ())
2857 *target_errno
= EBADF
;
2858 else if (fh
->target
== NULL
)
2859 *target_errno
= EIO
;
2861 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2862 len
, offset
, target_errno
);
2865 fprintf_unfiltered (gdb_stdlog
,
2866 "target_fileio_pwrite (%d,...,%d,%s) "
2868 fd
, len
, pulongest (offset
),
2869 ret
, ret
!= -1 ? 0 : *target_errno
);
2876 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2877 ULONGEST offset
, int *target_errno
)
2879 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2882 if (fh
->is_closed ())
2883 *target_errno
= EBADF
;
2884 else if (fh
->target
== NULL
)
2885 *target_errno
= EIO
;
2887 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2888 len
, offset
, target_errno
);
2891 fprintf_unfiltered (gdb_stdlog
,
2892 "target_fileio_pread (%d,...,%d,%s) "
2894 fd
, len
, pulongest (offset
),
2895 ret
, ret
!= -1 ? 0 : *target_errno
);
2902 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2904 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2907 if (fh
->is_closed ())
2908 *target_errno
= EBADF
;
2909 else if (fh
->target
== NULL
)
2910 *target_errno
= EIO
;
2912 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2915 fprintf_unfiltered (gdb_stdlog
,
2916 "target_fileio_fstat (%d) = %d (%d)\n",
2917 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2924 target_fileio_close (int fd
, int *target_errno
)
2926 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2929 if (fh
->is_closed ())
2930 *target_errno
= EBADF
;
2933 if (fh
->target
!= NULL
)
2934 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2938 release_fileio_fd (fd
, fh
);
2942 fprintf_unfiltered (gdb_stdlog
,
2943 "target_fileio_close (%d) = %d (%d)\n",
2944 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2951 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2954 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2956 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2958 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2962 fprintf_unfiltered (gdb_stdlog
,
2963 "target_fileio_unlink (%d,%s)"
2965 inf
== NULL
? 0 : inf
->num
, filename
,
2966 ret
, ret
!= -1 ? 0 : *target_errno
);
2970 *target_errno
= FILEIO_ENOSYS
;
2976 gdb::optional
<std::string
>
2977 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2980 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2982 gdb::optional
<std::string
> ret
2983 = t
->fileio_readlink (inf
, filename
, target_errno
);
2985 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2989 fprintf_unfiltered (gdb_stdlog
,
2990 "target_fileio_readlink (%d,%s)"
2992 inf
== NULL
? 0 : inf
->num
,
2993 filename
, ret
? ret
->c_str () : "(nil)",
2994 ret
? 0 : *target_errno
);
2998 *target_errno
= FILEIO_ENOSYS
;
3002 /* Like scoped_fd, but specific to target fileio. */
3004 class scoped_target_fd
3007 explicit scoped_target_fd (int fd
) noexcept
3012 ~scoped_target_fd ()
3018 target_fileio_close (m_fd
, &target_errno
);
3022 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3024 int get () const noexcept
3033 /* Read target file FILENAME, in the filesystem as seen by INF. If
3034 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3035 remote targets, the remote stub). Store the result in *BUF_P and
3036 return the size of the transferred data. PADDING additional bytes
3037 are available in *BUF_P. This is a helper function for
3038 target_fileio_read_alloc; see the declaration of that function for
3039 more information. */
3042 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3043 gdb_byte
**buf_p
, int padding
)
3045 size_t buf_alloc
, buf_pos
;
3050 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3051 0700, &target_errno
));
3052 if (fd
.get () == -1)
3055 /* Start by reading up to 4K at a time. The target will throttle
3056 this number down if necessary. */
3058 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3062 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3063 buf_alloc
- buf_pos
- padding
, buf_pos
,
3067 /* An error occurred. */
3073 /* Read all there was. */
3083 /* If the buffer is filling up, expand it. */
3084 if (buf_alloc
< buf_pos
* 2)
3087 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3097 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3100 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3105 gdb::unique_xmalloc_ptr
<char>
3106 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3110 LONGEST i
, transferred
;
3112 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3113 bufstr
= (char *) buffer
;
3115 if (transferred
< 0)
3116 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3118 if (transferred
== 0)
3119 return make_unique_xstrdup ("");
3121 bufstr
[transferred
] = 0;
3123 /* Check for embedded NUL bytes; but allow trailing NULs. */
3124 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3127 warning (_("target file %s "
3128 "contained unexpected null characters"),
3133 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3138 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3139 CORE_ADDR addr
, int len
)
3141 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3145 default_watchpoint_addr_within_range (struct target_ops
*target
,
3147 CORE_ADDR start
, int length
)
3149 return addr
>= start
&& addr
< start
+ length
;
3155 target_stack::find_beneath (const target_ops
*t
) const
3157 /* Look for a non-empty slot at stratum levels beneath T's. */
3158 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3159 if (m_stack
[stratum
] != NULL
)
3160 return m_stack
[stratum
];
3168 find_target_at (enum strata stratum
)
3170 return current_inferior ()->target_at (stratum
);
3178 target_announce_detach (int from_tty
)
3181 const char *exec_file
;
3186 exec_file
= get_exec_file (0);
3187 if (exec_file
== NULL
)
3190 pid
= inferior_ptid
.pid ();
3191 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3192 target_pid_to_str (ptid_t (pid
)).c_str ());
3195 /* The inferior process has died. Long live the inferior! */
3198 generic_mourn_inferior (void)
3200 inferior
*inf
= current_inferior ();
3202 inferior_ptid
= null_ptid
;
3204 /* Mark breakpoints uninserted in case something tries to delete a
3205 breakpoint while we delete the inferior's threads (which would
3206 fail, since the inferior is long gone). */
3207 mark_breakpoints_out ();
3210 exit_inferior (inf
);
3212 /* Note this wipes step-resume breakpoints, so needs to be done
3213 after exit_inferior, which ends up referencing the step-resume
3214 breakpoints through clear_thread_inferior_resources. */
3215 breakpoint_init_inferior (inf_exited
);
3217 registers_changed ();
3219 reopen_exec_file ();
3220 reinit_frame_cache ();
3222 if (deprecated_detach_hook
)
3223 deprecated_detach_hook ();
3226 /* Convert a normal process ID to a string. Returns the string in a
3230 normal_pid_to_str (ptid_t ptid
)
3232 return string_printf ("process %d", ptid
.pid ());
3236 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3238 return normal_pid_to_str (ptid
);
3241 /* Error-catcher for target_find_memory_regions. */
3243 dummy_find_memory_regions (struct target_ops
*self
,
3244 find_memory_region_ftype ignore1
, void *ignore2
)
3246 error (_("Command not implemented for this target."));
3250 /* Error-catcher for target_make_corefile_notes. */
3252 dummy_make_corefile_notes (struct target_ops
*self
,
3253 bfd
*ignore1
, int *ignore2
)
3255 error (_("Command not implemented for this target."));
3259 #include "target-delegates.c"
3261 /* The initial current target, so that there is always a semi-valid
3264 static dummy_target the_dummy_target
;
3271 return &the_dummy_target
;
3274 static const target_info dummy_target_info
= {
3281 dummy_target::stratum () const
3283 return dummy_stratum
;
3287 debug_target::stratum () const
3289 return debug_stratum
;
3293 dummy_target::info () const
3295 return dummy_target_info
;
3299 debug_target::info () const
3301 return beneath ()->info ();
3307 target_close (struct target_ops
*targ
)
3309 gdb_assert (!target_is_pushed (targ
));
3311 fileio_handles_invalidate_target (targ
);
3316 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3320 target_thread_alive (ptid_t ptid
)
3322 return current_top_target ()->thread_alive (ptid
);
3326 target_update_thread_list (void)
3328 current_top_target ()->update_thread_list ();
3332 target_stop (ptid_t ptid
)
3336 warning (_("May not interrupt or stop the target, ignoring attempt"));
3340 current_top_target ()->stop (ptid
);
3348 warning (_("May not interrupt or stop the target, ignoring attempt"));
3352 current_top_target ()->interrupt ();
3358 target_pass_ctrlc (void)
3360 /* Pass the Ctrl-C to the first target that has a thread
3362 for (inferior
*inf
: all_inferiors ())
3364 target_ops
*proc_target
= inf
->process_target ();
3365 if (proc_target
== NULL
)
3368 for (thread_info
*thr
: inf
->threads ())
3370 /* A thread can be THREAD_STOPPED and executing, while
3371 running an infcall. */
3372 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3374 /* We can get here quite deep in target layers. Avoid
3375 switching thread context or anything that would
3376 communicate with the target (e.g., to fetch
3377 registers), or flushing e.g., the frame cache. We
3378 just switch inferior in order to be able to call
3379 through the target_stack. */
3380 scoped_restore_current_inferior restore_inferior
;
3381 set_current_inferior (inf
);
3382 current_top_target ()->pass_ctrlc ();
3392 default_target_pass_ctrlc (struct target_ops
*ops
)
3394 target_interrupt ();
3397 /* See target/target.h. */
3400 target_stop_and_wait (ptid_t ptid
)
3402 struct target_waitstatus status
;
3403 bool was_non_stop
= non_stop
;
3408 memset (&status
, 0, sizeof (status
));
3409 target_wait (ptid
, &status
, 0);
3411 non_stop
= was_non_stop
;
3414 /* See target/target.h. */
3417 target_continue_no_signal (ptid_t ptid
)
3419 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3422 /* See target/target.h. */
3425 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3427 target_resume (ptid
, 0, signal
);
3430 /* Concatenate ELEM to LIST, a comma-separated list. */
3433 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3435 if (!list
->empty ())
3436 list
->append (", ");
3438 list
->append (elem
);
3441 /* Helper for target_options_to_string. If OPT is present in
3442 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3443 OPT is removed from TARGET_OPTIONS. */
3446 do_option (int *target_options
, std::string
*ret
,
3447 int opt
, const char *opt_str
)
3449 if ((*target_options
& opt
) != 0)
3451 str_comma_list_concat_elem (ret
, opt_str
);
3452 *target_options
&= ~opt
;
3459 target_options_to_string (int target_options
)
3463 #define DO_TARG_OPTION(OPT) \
3464 do_option (&target_options, &ret, OPT, #OPT)
3466 DO_TARG_OPTION (TARGET_WNOHANG
);
3468 if (target_options
!= 0)
3469 str_comma_list_concat_elem (&ret
, "unknown???");
3475 target_fetch_registers (struct regcache
*regcache
, int regno
)
3477 current_top_target ()->fetch_registers (regcache
, regno
);
3479 regcache
->debug_print_register ("target_fetch_registers", regno
);
3483 target_store_registers (struct regcache
*regcache
, int regno
)
3485 if (!may_write_registers
)
3486 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3488 current_top_target ()->store_registers (regcache
, regno
);
3491 regcache
->debug_print_register ("target_store_registers", regno
);
3496 target_core_of_thread (ptid_t ptid
)
3498 return current_top_target ()->core_of_thread (ptid
);
3502 simple_verify_memory (struct target_ops
*ops
,
3503 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3505 LONGEST total_xfered
= 0;
3507 while (total_xfered
< size
)
3509 ULONGEST xfered_len
;
3510 enum target_xfer_status status
;
3512 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3514 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3515 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3517 if (status
== TARGET_XFER_OK
3518 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3520 total_xfered
+= xfered_len
;
3529 /* Default implementation of memory verification. */
3532 default_verify_memory (struct target_ops
*self
,
3533 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3535 /* Start over from the top of the target stack. */
3536 return simple_verify_memory (current_top_target (),
3537 data
, memaddr
, size
);
3541 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3543 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3546 /* The documentation for this function is in its prototype declaration in
3550 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3551 enum target_hw_bp_type rw
)
3553 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3556 /* The documentation for this function is in its prototype declaration in
3560 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3561 enum target_hw_bp_type rw
)
3563 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3566 /* The documentation for this function is in its prototype declaration
3570 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3572 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3575 /* The documentation for this function is in its prototype declaration
3579 target_ranged_break_num_registers (void)
3581 return current_top_target ()->ranged_break_num_registers ();
3586 struct btrace_target_info
*
3587 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3589 return current_top_target ()->enable_btrace (ptid
, conf
);
3595 target_disable_btrace (struct btrace_target_info
*btinfo
)
3597 current_top_target ()->disable_btrace (btinfo
);
3603 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3605 current_top_target ()->teardown_btrace (btinfo
);
3611 target_read_btrace (struct btrace_data
*btrace
,
3612 struct btrace_target_info
*btinfo
,
3613 enum btrace_read_type type
)
3615 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3620 const struct btrace_config
*
3621 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3623 return current_top_target ()->btrace_conf (btinfo
);
3629 target_stop_recording (void)
3631 current_top_target ()->stop_recording ();
3637 target_save_record (const char *filename
)
3639 current_top_target ()->save_record (filename
);
3645 target_supports_delete_record ()
3647 return current_top_target ()->supports_delete_record ();
3653 target_delete_record (void)
3655 current_top_target ()->delete_record ();
3661 target_record_method (ptid_t ptid
)
3663 return current_top_target ()->record_method (ptid
);
3669 target_record_is_replaying (ptid_t ptid
)
3671 return current_top_target ()->record_is_replaying (ptid
);
3677 target_record_will_replay (ptid_t ptid
, int dir
)
3679 return current_top_target ()->record_will_replay (ptid
, dir
);
3685 target_record_stop_replaying (void)
3687 current_top_target ()->record_stop_replaying ();
3693 target_goto_record_begin (void)
3695 current_top_target ()->goto_record_begin ();
3701 target_goto_record_end (void)
3703 current_top_target ()->goto_record_end ();
3709 target_goto_record (ULONGEST insn
)
3711 current_top_target ()->goto_record (insn
);
3717 target_insn_history (int size
, gdb_disassembly_flags flags
)
3719 current_top_target ()->insn_history (size
, flags
);
3725 target_insn_history_from (ULONGEST from
, int size
,
3726 gdb_disassembly_flags flags
)
3728 current_top_target ()->insn_history_from (from
, size
, flags
);
3734 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3735 gdb_disassembly_flags flags
)
3737 current_top_target ()->insn_history_range (begin
, end
, flags
);
3743 target_call_history (int size
, record_print_flags flags
)
3745 current_top_target ()->call_history (size
, flags
);
3751 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3753 current_top_target ()->call_history_from (begin
, size
, flags
);
3759 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3761 current_top_target ()->call_history_range (begin
, end
, flags
);
3766 const struct frame_unwind
*
3767 target_get_unwinder (void)
3769 return current_top_target ()->get_unwinder ();
3774 const struct frame_unwind
*
3775 target_get_tailcall_unwinder (void)
3777 return current_top_target ()->get_tailcall_unwinder ();
3783 target_prepare_to_generate_core (void)
3785 current_top_target ()->prepare_to_generate_core ();
3791 target_done_generating_core (void)
3793 current_top_target ()->done_generating_core ();
3798 static char targ_desc
[] =
3799 "Names of targets and files being debugged.\nShows the entire \
3800 stack of targets currently in use (including the exec-file,\n\
3801 core-file, and process, if any), as well as the symbol file name.";
3804 default_rcmd (struct target_ops
*self
, const char *command
,
3805 struct ui_file
*output
)
3807 error (_("\"monitor\" command not supported by this target."));
3811 do_monitor_command (const char *cmd
, int from_tty
)
3813 target_rcmd (cmd
, gdb_stdtarg
);
3816 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3820 flash_erase_command (const char *cmd
, int from_tty
)
3822 /* Used to communicate termination of flash operations to the target. */
3823 bool found_flash_region
= false;
3824 struct gdbarch
*gdbarch
= target_gdbarch ();
3826 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3828 /* Iterate over all memory regions. */
3829 for (const mem_region
&m
: mem_regions
)
3831 /* Is this a flash memory region? */
3832 if (m
.attrib
.mode
== MEM_FLASH
)
3834 found_flash_region
= true;
3835 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3837 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3839 current_uiout
->message (_("Erasing flash memory region at address "));
3840 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3841 current_uiout
->message (", size = ");
3842 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3843 current_uiout
->message ("\n");
3847 /* Did we do any flash operations? If so, we need to finalize them. */
3848 if (found_flash_region
)
3849 target_flash_done ();
3851 current_uiout
->message (_("No flash memory regions found.\n"));
3854 /* Print the name of each layers of our target stack. */
3857 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3859 printf_filtered (_("The current target stack is:\n"));
3861 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3863 if (t
->stratum () == debug_stratum
)
3865 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3872 target_async (int enable
)
3874 infrun_async (enable
);
3875 current_top_target ()->async (enable
);
3881 target_thread_events (int enable
)
3883 current_top_target ()->thread_events (enable
);
3886 /* Controls if targets can report that they can/are async. This is
3887 just for maintainers to use when debugging gdb. */
3888 bool target_async_permitted
= true;
3890 /* The set command writes to this variable. If the inferior is
3891 executing, target_async_permitted is *not* updated. */
3892 static bool target_async_permitted_1
= true;
3895 maint_set_target_async_command (const char *args
, int from_tty
,
3896 struct cmd_list_element
*c
)
3898 if (have_live_inferiors ())
3900 target_async_permitted_1
= target_async_permitted
;
3901 error (_("Cannot change this setting while the inferior is running."));
3904 target_async_permitted
= target_async_permitted_1
;
3908 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3909 struct cmd_list_element
*c
,
3912 fprintf_filtered (file
,
3913 _("Controlling the inferior in "
3914 "asynchronous mode is %s.\n"), value
);
3917 /* Return true if the target operates in non-stop mode even with "set
3921 target_always_non_stop_p (void)
3923 return current_top_target ()->always_non_stop_p ();
3929 target_is_non_stop_p (void)
3932 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3933 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3934 && target_always_non_stop_p ()));
3937 /* Controls if targets can report that they always run in non-stop
3938 mode. This is just for maintainers to use when debugging gdb. */
3939 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3941 /* The set command writes to this variable. If the inferior is
3942 executing, target_non_stop_enabled is *not* updated. */
3943 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3945 /* Implementation of "maint set target-non-stop". */
3948 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3949 struct cmd_list_element
*c
)
3951 if (have_live_inferiors ())
3953 target_non_stop_enabled_1
= target_non_stop_enabled
;
3954 error (_("Cannot change this setting while the inferior is running."));
3957 target_non_stop_enabled
= target_non_stop_enabled_1
;
3960 /* Implementation of "maint show target-non-stop". */
3963 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3964 struct cmd_list_element
*c
,
3967 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3968 fprintf_filtered (file
,
3969 _("Whether the target is always in non-stop mode "
3970 "is %s (currently %s).\n"), value
,
3971 target_always_non_stop_p () ? "on" : "off");
3973 fprintf_filtered (file
,
3974 _("Whether the target is always in non-stop mode "
3975 "is %s.\n"), value
);
3978 /* Temporary copies of permission settings. */
3980 static bool may_write_registers_1
= true;
3981 static bool may_write_memory_1
= true;
3982 static bool may_insert_breakpoints_1
= true;
3983 static bool may_insert_tracepoints_1
= true;
3984 static bool may_insert_fast_tracepoints_1
= true;
3985 static bool may_stop_1
= true;
3987 /* Make the user-set values match the real values again. */
3990 update_target_permissions (void)
3992 may_write_registers_1
= may_write_registers
;
3993 may_write_memory_1
= may_write_memory
;
3994 may_insert_breakpoints_1
= may_insert_breakpoints
;
3995 may_insert_tracepoints_1
= may_insert_tracepoints
;
3996 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3997 may_stop_1
= may_stop
;
4000 /* The one function handles (most of) the permission flags in the same
4004 set_target_permissions (const char *args
, int from_tty
,
4005 struct cmd_list_element
*c
)
4007 if (target_has_execution
)
4009 update_target_permissions ();
4010 error (_("Cannot change this setting while the inferior is running."));
4013 /* Make the real values match the user-changed values. */
4014 may_write_registers
= may_write_registers_1
;
4015 may_insert_breakpoints
= may_insert_breakpoints_1
;
4016 may_insert_tracepoints
= may_insert_tracepoints_1
;
4017 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4018 may_stop
= may_stop_1
;
4019 update_observer_mode ();
4022 /* Set memory write permission independently of observer mode. */
4025 set_write_memory_permission (const char *args
, int from_tty
,
4026 struct cmd_list_element
*c
)
4028 /* Make the real values match the user-changed values. */
4029 may_write_memory
= may_write_memory_1
;
4030 update_observer_mode ();
4033 void _initialize_target ();
4036 _initialize_target ()
4038 the_debug_target
= new debug_target ();
4040 add_info ("target", info_target_command
, targ_desc
);
4041 add_info ("files", info_target_command
, targ_desc
);
4043 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4044 Set target debugging."), _("\
4045 Show target debugging."), _("\
4046 When non-zero, target debugging is enabled. Higher numbers are more\n\
4050 &setdebuglist
, &showdebuglist
);
4052 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4053 &trust_readonly
, _("\
4054 Set mode for reading from readonly sections."), _("\
4055 Show mode for reading from readonly sections."), _("\
4056 When this mode is on, memory reads from readonly sections (such as .text)\n\
4057 will be read from the object file instead of from the target. This will\n\
4058 result in significant performance improvement for remote targets."),
4060 show_trust_readonly
,
4061 &setlist
, &showlist
);
4063 add_com ("monitor", class_obscure
, do_monitor_command
,
4064 _("Send a command to the remote monitor (remote targets only)."));
4066 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4067 _("Print the name of each layer of the internal target stack."),
4068 &maintenanceprintlist
);
4070 add_setshow_boolean_cmd ("target-async", no_class
,
4071 &target_async_permitted_1
, _("\
4072 Set whether gdb controls the inferior in asynchronous mode."), _("\
4073 Show whether gdb controls the inferior in asynchronous mode."), _("\
4074 Tells gdb whether to control the inferior in asynchronous mode."),
4075 maint_set_target_async_command
,
4076 maint_show_target_async_command
,
4077 &maintenance_set_cmdlist
,
4078 &maintenance_show_cmdlist
);
4080 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4081 &target_non_stop_enabled_1
, _("\
4082 Set whether gdb always controls the inferior in non-stop mode."), _("\
4083 Show whether gdb always controls the inferior in non-stop mode."), _("\
4084 Tells gdb whether to control the inferior in non-stop mode."),
4085 maint_set_target_non_stop_command
,
4086 maint_show_target_non_stop_command
,
4087 &maintenance_set_cmdlist
,
4088 &maintenance_show_cmdlist
);
4090 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4091 &may_write_registers_1
, _("\
4092 Set permission to write into registers."), _("\
4093 Show permission to write into registers."), _("\
4094 When this permission is on, GDB may write into the target's registers.\n\
4095 Otherwise, any sort of write attempt will result in an error."),
4096 set_target_permissions
, NULL
,
4097 &setlist
, &showlist
);
4099 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4100 &may_write_memory_1
, _("\
4101 Set permission to write into target memory."), _("\
4102 Show permission to write into target memory."), _("\
4103 When this permission is on, GDB may write into the target's memory.\n\
4104 Otherwise, any sort of write attempt will result in an error."),
4105 set_write_memory_permission
, NULL
,
4106 &setlist
, &showlist
);
4108 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4109 &may_insert_breakpoints_1
, _("\
4110 Set permission to insert breakpoints in the target."), _("\
4111 Show permission to insert breakpoints in the target."), _("\
4112 When this permission is on, GDB may insert breakpoints in the program.\n\
4113 Otherwise, any sort of insertion attempt will result in an error."),
4114 set_target_permissions
, NULL
,
4115 &setlist
, &showlist
);
4117 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4118 &may_insert_tracepoints_1
, _("\
4119 Set permission to insert tracepoints in the target."), _("\
4120 Show permission to insert tracepoints in the target."), _("\
4121 When this permission is on, GDB may insert tracepoints in the program.\n\
4122 Otherwise, any sort of insertion attempt will result in an error."),
4123 set_target_permissions
, NULL
,
4124 &setlist
, &showlist
);
4126 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4127 &may_insert_fast_tracepoints_1
, _("\
4128 Set permission to insert fast tracepoints in the target."), _("\
4129 Show permission to insert fast tracepoints in the target."), _("\
4130 When this permission is on, GDB may insert fast tracepoints.\n\
4131 Otherwise, any sort of insertion attempt will result in an error."),
4132 set_target_permissions
, NULL
,
4133 &setlist
, &showlist
);
4135 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4137 Set permission to interrupt or signal the target."), _("\
4138 Show permission to interrupt or signal the target."), _("\
4139 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4140 Otherwise, any attempt to interrupt or stop will be ignored."),
4141 set_target_permissions
, NULL
,
4142 &setlist
, &showlist
);
4144 add_com ("flash-erase", no_class
, flash_erase_command
,
4145 _("Erase all flash memory regions."));
4147 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4148 &auto_connect_native_target
, _("\
4149 Set whether GDB may automatically connect to the native target."), _("\
4150 Show whether GDB may automatically connect to the native target."), _("\
4151 When on, and GDB is not connected to a target yet, GDB\n\
4152 attempts \"run\" and other commands with the native target."),
4153 NULL
, show_auto_connect_native_target
,
4154 &setlist
, &showlist
);