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>
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
55 static void default_terminal_info (struct target_ops
*, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops
*,
58 CORE_ADDR
, CORE_ADDR
, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
63 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
65 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
68 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
71 static void default_mourn_inferior (struct target_ops
*self
);
73 static int default_search_memory (struct target_ops
*ops
,
75 ULONGEST search_space_len
,
76 const gdb_byte
*pattern
,
78 CORE_ADDR
*found_addrp
);
80 static int default_verify_memory (struct target_ops
*self
,
82 CORE_ADDR memaddr
, ULONGEST size
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static struct target_ops
*find_default_run_target (const char *);
88 static int dummy_find_memory_regions (struct target_ops
*self
,
89 find_memory_region_ftype ignore1
,
92 static char *dummy_make_corefile_notes (struct target_ops
*self
,
93 bfd
*ignore1
, int *ignore2
);
95 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
97 static enum exec_direction_kind default_execution_direction
98 (struct target_ops
*self
);
100 /* Mapping between target_info objects (which have address identity)
101 and corresponding open/factory function/callback. Each add_target
102 call adds one entry to this map, and registers a "target
103 TARGET_NAME" command that when invoked calls the factory registered
104 here. The target_info object is associated with the command via
105 the command's context. */
106 static std::unordered_map
<const target_info
*, target_open_ftype
*>
109 /* The singleton debug target. */
111 static struct target_ops
*the_debug_target
;
113 /* Top of target stack. */
114 /* The target structure we are currently using to talk to a process
115 or file or whatever "inferior" we have. */
118 current_top_target ()
120 return current_inferior ()->top_target ();
123 /* Command list for target. */
125 static struct cmd_list_element
*targetlist
= NULL
;
127 /* True if we should trust readonly sections from the
128 executable when reading memory. */
130 static bool trust_readonly
= false;
132 /* Nonzero if we should show true memory content including
133 memory breakpoint inserted by gdb. */
135 static int show_memory_breakpoints
= 0;
137 /* These globals control whether GDB attempts to perform these
138 operations; they are useful for targets that need to prevent
139 inadvertent disruption, such as in non-stop mode. */
141 bool may_write_registers
= true;
143 bool may_write_memory
= true;
145 bool may_insert_breakpoints
= true;
147 bool may_insert_tracepoints
= true;
149 bool may_insert_fast_tracepoints
= true;
151 bool may_stop
= true;
153 /* Non-zero if we want to see trace of target level stuff. */
155 static unsigned int targetdebug
= 0;
158 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
161 push_target (the_debug_target
);
163 unpush_target (the_debug_target
);
167 show_targetdebug (struct ui_file
*file
, int from_tty
,
168 struct cmd_list_element
*c
, const char *value
)
170 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
173 /* The user just typed 'target' without the name of a target. */
176 target_command (const char *arg
, int from_tty
)
178 fputs_filtered ("Argument required (target name). Try `help target'\n",
183 target_has_all_memory_1 (void)
185 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
186 if (t
->has_all_memory ())
193 target_has_memory_1 (void)
195 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
196 if (t
->has_memory ())
203 target_has_stack_1 (void)
205 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
213 target_has_registers_1 (void)
215 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
216 if (t
->has_registers ())
223 target_has_execution_1 (inferior
*inf
)
225 for (target_ops
*t
= inf
->top_target ();
227 t
= inf
->find_target_beneath (t
))
228 if (t
->has_execution (inf
))
235 target_has_execution_current (void)
237 return target_has_execution_1 (current_inferior ());
240 /* This is used to implement the various target commands. */
243 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
245 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
246 target_open_ftype
*func
= target_factories
[ti
];
249 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
252 func (args
, from_tty
);
255 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
256 ti
->shortname
, args
, from_tty
);
262 add_target (const target_info
&t
, target_open_ftype
*func
,
263 completer_ftype
*completer
)
265 struct cmd_list_element
*c
;
267 auto &func_slot
= target_factories
[&t
];
268 if (func_slot
!= nullptr)
269 internal_error (__FILE__
, __LINE__
,
270 _("target already added (\"%s\")."), t
.shortname
);
273 if (targetlist
== NULL
)
274 add_prefix_cmd ("target", class_run
, target_command
, _("\
275 Connect to a target machine or process.\n\
276 The first argument is the type or protocol of the target machine.\n\
277 Remaining arguments are interpreted by the target protocol. For more\n\
278 information on the arguments for a particular protocol, type\n\
279 `help target ' followed by the protocol name."),
280 &targetlist
, "target ", 0, &cmdlist
);
281 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
282 set_cmd_context (c
, (void *) &t
);
283 set_cmd_sfunc (c
, open_target
);
284 if (completer
!= NULL
)
285 set_cmd_completer (c
, completer
);
291 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
293 struct cmd_list_element
*c
;
296 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
298 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
299 set_cmd_sfunc (c
, open_target
);
300 set_cmd_context (c
, (void *) &tinfo
);
301 alt
= xstrprintf ("target %s", tinfo
.shortname
);
302 deprecate_cmd (c
, alt
);
310 current_top_target ()->kill ();
314 target_load (const char *arg
, int from_tty
)
316 target_dcache_invalidate ();
317 current_top_target ()->load (arg
, from_tty
);
322 target_terminal_state
target_terminal::m_terminal_state
323 = target_terminal_state::is_ours
;
325 /* See target/target.h. */
328 target_terminal::init (void)
330 current_top_target ()->terminal_init ();
332 m_terminal_state
= target_terminal_state::is_ours
;
335 /* See target/target.h. */
338 target_terminal::inferior (void)
340 struct ui
*ui
= current_ui
;
342 /* A background resume (``run&'') should leave GDB in control of the
344 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
347 /* Since we always run the inferior in the main console (unless "set
348 inferior-tty" is in effect), when some UI other than the main one
349 calls target_terminal::inferior, then we leave the main UI's
350 terminal settings as is. */
354 /* If GDB is resuming the inferior in the foreground, install
355 inferior's terminal modes. */
357 struct inferior
*inf
= current_inferior ();
359 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
361 current_top_target ()->terminal_inferior ();
362 inf
->terminal_state
= target_terminal_state::is_inferior
;
365 m_terminal_state
= target_terminal_state::is_inferior
;
367 /* If the user hit C-c before, pretend that it was hit right
369 if (check_quit_flag ())
370 target_pass_ctrlc ();
373 /* See target/target.h. */
376 target_terminal::restore_inferior (void)
378 struct ui
*ui
= current_ui
;
380 /* See target_terminal::inferior(). */
381 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
384 /* Restore the terminal settings of inferiors that were in the
385 foreground but are now ours_for_output due to a temporary
386 target_target::ours_for_output() call. */
389 scoped_restore_current_inferior restore_inferior
;
391 for (::inferior
*inf
: all_inferiors ())
393 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
395 set_current_inferior (inf
);
396 current_top_target ()->terminal_inferior ();
397 inf
->terminal_state
= target_terminal_state::is_inferior
;
402 m_terminal_state
= target_terminal_state::is_inferior
;
404 /* If the user hit C-c before, pretend that it was hit right
406 if (check_quit_flag ())
407 target_pass_ctrlc ();
410 /* Switch terminal state to DESIRED_STATE, either is_ours, or
411 is_ours_for_output. */
414 target_terminal_is_ours_kind (target_terminal_state desired_state
)
416 scoped_restore_current_inferior restore_inferior
;
418 /* Must do this in two passes. First, have all inferiors save the
419 current terminal settings. Then, after all inferiors have add a
420 chance to safely save the terminal settings, restore GDB's
421 terminal settings. */
423 for (inferior
*inf
: all_inferiors ())
425 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
427 set_current_inferior (inf
);
428 current_top_target ()->terminal_save_inferior ();
432 for (inferior
*inf
: all_inferiors ())
434 /* Note we don't check is_inferior here like above because we
435 need to handle 'is_ours_for_output -> is_ours' too. Careful
436 to never transition from 'is_ours' to 'is_ours_for_output',
438 if (inf
->terminal_state
!= target_terminal_state::is_ours
439 && inf
->terminal_state
!= desired_state
)
441 set_current_inferior (inf
);
442 if (desired_state
== target_terminal_state::is_ours
)
443 current_top_target ()->terminal_ours ();
444 else if (desired_state
== target_terminal_state::is_ours_for_output
)
445 current_top_target ()->terminal_ours_for_output ();
447 gdb_assert_not_reached ("unhandled desired state");
448 inf
->terminal_state
= desired_state
;
453 /* See target/target.h. */
456 target_terminal::ours ()
458 struct ui
*ui
= current_ui
;
460 /* See target_terminal::inferior. */
464 if (m_terminal_state
== target_terminal_state::is_ours
)
467 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
468 m_terminal_state
= target_terminal_state::is_ours
;
471 /* See target/target.h. */
474 target_terminal::ours_for_output ()
476 struct ui
*ui
= current_ui
;
478 /* See target_terminal::inferior. */
482 if (!target_terminal::is_inferior ())
485 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
486 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
489 /* See target/target.h. */
492 target_terminal::info (const char *arg
, int from_tty
)
494 current_top_target ()->terminal_info (arg
, from_tty
);
500 target_supports_terminal_ours (void)
502 /* The current top target is the target at the top of the target
503 stack of the current inferior. While normally there's always an
504 inferior, we must check for nullptr here because we can get here
505 very early during startup, before the initial inferior is first
507 inferior
*inf
= current_inferior ();
511 return inf
->top_target ()->supports_terminal_ours ();
517 error (_("You can't do that when your target is `%s'"),
518 current_top_target ()->shortname ());
524 error (_("You can't do that without a process to debug."));
528 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
530 printf_unfiltered (_("No saved terminal information.\n"));
533 /* A default implementation for the to_get_ada_task_ptid target method.
535 This function builds the PTID by using both LWP and TID as part of
536 the PTID lwp and tid elements. The pid used is the pid of the
540 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
542 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
545 static enum exec_direction_kind
546 default_execution_direction (struct target_ops
*self
)
548 if (!target_can_execute_reverse
)
550 else if (!target_can_async_p ())
553 gdb_assert_not_reached ("\
554 to_execution_direction must be implemented for reverse async");
560 decref_target (target_ops
*t
)
563 if (t
->refcount () == 0)
570 target_stack::push (target_ops
*t
)
574 strata stratum
= t
->stratum ();
576 /* If there's already a target at this stratum, remove it. */
578 if (m_stack
[stratum
] != NULL
)
579 unpush (m_stack
[stratum
]);
581 /* Now add the new one. */
582 m_stack
[stratum
] = t
;
591 push_target (struct target_ops
*t
)
593 current_inferior ()->push_target (t
);
599 push_target (target_ops_up
&&t
)
601 current_inferior ()->push_target (t
.get ());
608 unpush_target (struct target_ops
*t
)
610 return current_inferior ()->unpush_target (t
);
616 target_stack::unpush (target_ops
*t
)
618 gdb_assert (t
!= NULL
);
620 strata stratum
= t
->stratum ();
622 if (stratum
== dummy_stratum
)
623 internal_error (__FILE__
, __LINE__
,
624 _("Attempt to unpush the dummy target"));
626 /* Look for the specified target. Note that a target can only occur
627 once in the target stack. */
629 if (m_stack
[stratum
] != t
)
631 /* If T wasn't pushed, quit. Only open targets should be
636 /* Unchain the target. */
637 m_stack
[stratum
] = NULL
;
639 if (m_top
== stratum
)
640 m_top
= t
->beneath ()->stratum ();
642 /* Finally close the target, if there are no inferiors
643 referencing this target still. Note we do this after unchaining,
644 so any target method calls from within the target_close
645 implementation don't end up in T anymore. Do leave the target
646 open if we have are other inferiors referencing this target
653 /* Unpush TARGET and assert that it worked. */
656 unpush_target_and_assert (struct target_ops
*target
)
658 if (!unpush_target (target
))
660 fprintf_unfiltered (gdb_stderr
,
661 "pop_all_targets couldn't find target %s\n",
662 target
->shortname ());
663 internal_error (__FILE__
, __LINE__
,
664 _("failed internal consistency check"));
669 pop_all_targets_above (enum strata above_stratum
)
671 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
672 unpush_target_and_assert (current_top_target ());
678 pop_all_targets_at_and_above (enum strata stratum
)
680 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
681 unpush_target_and_assert (current_top_target ());
685 pop_all_targets (void)
687 pop_all_targets_above (dummy_stratum
);
690 /* Return true if T is now pushed in the current inferior's target
691 stack. Return false otherwise. */
694 target_is_pushed (target_ops
*t
)
696 return current_inferior ()->target_is_pushed (t
);
699 /* Default implementation of to_get_thread_local_address. */
702 generic_tls_error (void)
704 throw_error (TLS_GENERIC_ERROR
,
705 _("Cannot find thread-local variables on this target"));
708 /* Using the objfile specified in OBJFILE, find the address for the
709 current thread's thread-local storage with offset OFFSET. */
711 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
713 volatile CORE_ADDR addr
= 0;
714 struct target_ops
*target
= current_top_target ();
715 struct gdbarch
*gdbarch
= target_gdbarch ();
717 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
719 ptid_t ptid
= inferior_ptid
;
725 /* Fetch the load module address for this objfile. */
726 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
729 if (gdbarch_get_thread_local_address_p (gdbarch
))
730 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
733 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
735 /* If an error occurred, print TLS related messages here. Otherwise,
736 throw the error to some higher catcher. */
737 catch (const gdb_exception
&ex
)
739 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
743 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
744 error (_("Cannot find thread-local variables "
745 "in this thread library."));
747 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
748 if (objfile_is_library
)
749 error (_("Cannot find shared library `%s' in dynamic"
750 " linker's load module list"), objfile_name (objfile
));
752 error (_("Cannot find executable file `%s' in dynamic"
753 " linker's load module list"), objfile_name (objfile
));
755 case TLS_NOT_ALLOCATED_YET_ERROR
:
756 if (objfile_is_library
)
757 error (_("The inferior has not yet allocated storage for"
758 " thread-local variables in\n"
759 "the shared library `%s'\n"
761 objfile_name (objfile
),
762 target_pid_to_str (ptid
).c_str ());
764 error (_("The inferior has not yet allocated storage for"
765 " thread-local variables in\n"
766 "the executable `%s'\n"
768 objfile_name (objfile
),
769 target_pid_to_str (ptid
).c_str ());
771 case TLS_GENERIC_ERROR
:
772 if (objfile_is_library
)
773 error (_("Cannot find thread-local storage for %s, "
774 "shared library %s:\n%s"),
775 target_pid_to_str (ptid
).c_str (),
776 objfile_name (objfile
), ex
.what ());
778 error (_("Cannot find thread-local storage for %s, "
779 "executable file %s:\n%s"),
780 target_pid_to_str (ptid
).c_str (),
781 objfile_name (objfile
), ex
.what ());
790 error (_("Cannot find thread-local variables on this target"));
796 target_xfer_status_to_string (enum target_xfer_status status
)
798 #define CASE(X) case X: return #X
801 CASE(TARGET_XFER_E_IO
);
802 CASE(TARGET_XFER_UNAVAILABLE
);
811 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
813 /* target_read_string -- read a null terminated string, up to LEN bytes,
814 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
815 Set *STRING to a pointer to malloc'd memory containing the data; the caller
816 is responsible for freeing it. Return the number of bytes successfully
820 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
821 int len
, int *errnop
)
827 int buffer_allocated
;
829 unsigned int nbytes_read
= 0;
833 /* Small for testing. */
834 buffer_allocated
= 4;
835 buffer
= (char *) xmalloc (buffer_allocated
);
840 tlen
= MIN (len
, 4 - (memaddr
& 3));
841 offset
= memaddr
& 3;
843 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
846 /* The transfer request might have crossed the boundary to an
847 unallocated region of memory. Retry the transfer, requesting
851 errcode
= target_read_memory (memaddr
, buf
, 1);
856 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
860 bytes
= bufptr
- buffer
;
861 buffer_allocated
*= 2;
862 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
863 bufptr
= buffer
+ bytes
;
866 for (i
= 0; i
< tlen
; i
++)
868 *bufptr
++ = buf
[i
+ offset
];
869 if (buf
[i
+ offset
] == '\000')
871 nbytes_read
+= i
+ 1;
881 string
->reset (buffer
);
887 struct target_section_table
*
888 target_get_section_table (struct target_ops
*target
)
890 return target
->get_section_table ();
893 /* Find a section containing ADDR. */
895 struct target_section
*
896 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
898 struct target_section_table
*table
= target_get_section_table (target
);
899 struct target_section
*secp
;
904 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
906 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
913 /* Helper for the memory xfer routines. Checks the attributes of the
914 memory region of MEMADDR against the read or write being attempted.
915 If the access is permitted returns true, otherwise returns false.
916 REGION_P is an optional output parameter. If not-NULL, it is
917 filled with a pointer to the memory region of MEMADDR. REG_LEN
918 returns LEN trimmed to the end of the region. This is how much the
919 caller can continue requesting, if the access is permitted. A
920 single xfer request must not straddle memory region boundaries. */
923 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
924 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
925 struct mem_region
**region_p
)
927 struct mem_region
*region
;
929 region
= lookup_mem_region (memaddr
);
931 if (region_p
!= NULL
)
934 switch (region
->attrib
.mode
)
937 if (writebuf
!= NULL
)
947 /* We only support writing to flash during "load" for now. */
948 if (writebuf
!= NULL
)
949 error (_("Writing to flash memory forbidden in this context"));
956 /* region->hi == 0 means there's no upper bound. */
957 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
960 *reg_len
= region
->hi
- memaddr
;
965 /* Read memory from more than one valid target. A core file, for
966 instance, could have some of memory but delegate other bits to
967 the target below it. So, we must manually try all targets. */
969 enum target_xfer_status
970 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
971 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
972 ULONGEST
*xfered_len
)
974 enum target_xfer_status res
;
978 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
979 readbuf
, writebuf
, memaddr
, len
,
981 if (res
== TARGET_XFER_OK
)
984 /* Stop if the target reports that the memory is not available. */
985 if (res
== TARGET_XFER_UNAVAILABLE
)
988 /* We want to continue past core files to executables, but not
989 past a running target's memory. */
990 if (ops
->has_all_memory ())
993 ops
= ops
->beneath ();
997 /* The cache works at the raw memory level. Make sure the cache
998 gets updated with raw contents no matter what kind of memory
999 object was originally being written. Note we do write-through
1000 first, so that if it fails, we don't write to the cache contents
1001 that never made it to the target. */
1002 if (writebuf
!= NULL
1003 && inferior_ptid
!= null_ptid
1004 && target_dcache_init_p ()
1005 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1007 DCACHE
*dcache
= target_dcache_get ();
1009 /* Note that writing to an area of memory which wasn't present
1010 in the cache doesn't cause it to be loaded in. */
1011 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1017 /* Perform a partial memory transfer.
1018 For docs see target.h, to_xfer_partial. */
1020 static enum target_xfer_status
1021 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1022 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1023 ULONGEST len
, ULONGEST
*xfered_len
)
1025 enum target_xfer_status res
;
1027 struct mem_region
*region
;
1028 struct inferior
*inf
;
1030 /* For accesses to unmapped overlay sections, read directly from
1031 files. Must do this first, as MEMADDR may need adjustment. */
1032 if (readbuf
!= NULL
&& overlay_debugging
)
1034 struct obj_section
*section
= find_pc_overlay (memaddr
);
1036 if (pc_in_unmapped_range (memaddr
, section
))
1038 struct target_section_table
*table
1039 = target_get_section_table (ops
);
1040 const char *section_name
= section
->the_bfd_section
->name
;
1042 memaddr
= overlay_mapped_address (memaddr
, section
);
1043 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1044 memaddr
, len
, xfered_len
,
1046 table
->sections_end
,
1051 /* Try the executable files, if "trust-readonly-sections" is set. */
1052 if (readbuf
!= NULL
&& trust_readonly
)
1054 struct target_section
*secp
;
1055 struct target_section_table
*table
;
1057 secp
= target_section_by_addr (ops
, memaddr
);
1059 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1061 table
= target_get_section_table (ops
);
1062 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1063 memaddr
, len
, xfered_len
,
1065 table
->sections_end
,
1070 /* Try GDB's internal data cache. */
1072 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1074 return TARGET_XFER_E_IO
;
1076 if (inferior_ptid
!= null_ptid
)
1077 inf
= current_inferior ();
1083 /* The dcache reads whole cache lines; that doesn't play well
1084 with reading from a trace buffer, because reading outside of
1085 the collected memory range fails. */
1086 && get_traceframe_number () == -1
1087 && (region
->attrib
.cache
1088 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1089 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1091 DCACHE
*dcache
= target_dcache_get_or_init ();
1093 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1094 reg_len
, xfered_len
);
1097 /* If none of those methods found the memory we wanted, fall back
1098 to a target partial transfer. Normally a single call to
1099 to_xfer_partial is enough; if it doesn't recognize an object
1100 it will call the to_xfer_partial of the next target down.
1101 But for memory this won't do. Memory is the only target
1102 object which can be read from more than one valid target.
1103 A core file, for instance, could have some of memory but
1104 delegate other bits to the target below it. So, we must
1105 manually try all targets. */
1107 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1110 /* If we still haven't got anything, return the last error. We
1115 /* Perform a partial memory transfer. For docs see target.h,
1118 static enum target_xfer_status
1119 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1120 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1121 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1123 enum target_xfer_status res
;
1125 /* Zero length requests are ok and require no work. */
1127 return TARGET_XFER_EOF
;
1129 memaddr
= address_significant (target_gdbarch (), memaddr
);
1131 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1132 breakpoint insns, thus hiding out from higher layers whether
1133 there are software breakpoints inserted in the code stream. */
1134 if (readbuf
!= NULL
)
1136 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1139 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1140 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1144 /* A large write request is likely to be partially satisfied
1145 by memory_xfer_partial_1. We will continually malloc
1146 and free a copy of the entire write request for breakpoint
1147 shadow handling even though we only end up writing a small
1148 subset of it. Cap writes to a limit specified by the target
1149 to mitigate this. */
1150 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1152 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1153 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1154 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1161 scoped_restore_tmpl
<int>
1162 make_scoped_restore_show_memory_breakpoints (int show
)
1164 return make_scoped_restore (&show_memory_breakpoints
, show
);
1167 /* For docs see target.h, to_xfer_partial. */
1169 enum target_xfer_status
1170 target_xfer_partial (struct target_ops
*ops
,
1171 enum target_object object
, const char *annex
,
1172 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1173 ULONGEST offset
, ULONGEST len
,
1174 ULONGEST
*xfered_len
)
1176 enum target_xfer_status retval
;
1178 /* Transfer is done when LEN is zero. */
1180 return TARGET_XFER_EOF
;
1182 if (writebuf
&& !may_write_memory
)
1183 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1184 core_addr_to_string_nz (offset
), plongest (len
));
1188 /* If this is a memory transfer, let the memory-specific code
1189 have a look at it instead. Memory transfers are more
1191 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1192 || object
== TARGET_OBJECT_CODE_MEMORY
)
1193 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1194 writebuf
, offset
, len
, xfered_len
);
1195 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1197 /* Skip/avoid accessing the target if the memory region
1198 attributes block the access. Check this here instead of in
1199 raw_memory_xfer_partial as otherwise we'd end up checking
1200 this twice in the case of the memory_xfer_partial path is
1201 taken; once before checking the dcache, and another in the
1202 tail call to raw_memory_xfer_partial. */
1203 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1205 return TARGET_XFER_E_IO
;
1207 /* Request the normal memory object from other layers. */
1208 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1212 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1213 writebuf
, offset
, len
, xfered_len
);
1217 const unsigned char *myaddr
= NULL
;
1219 fprintf_unfiltered (gdb_stdlog
,
1220 "%s:target_xfer_partial "
1221 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1224 (annex
? annex
: "(null)"),
1225 host_address_to_string (readbuf
),
1226 host_address_to_string (writebuf
),
1227 core_addr_to_string_nz (offset
),
1228 pulongest (len
), retval
,
1229 pulongest (*xfered_len
));
1235 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1239 fputs_unfiltered (", bytes =", gdb_stdlog
);
1240 for (i
= 0; i
< *xfered_len
; i
++)
1242 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1244 if (targetdebug
< 2 && i
> 0)
1246 fprintf_unfiltered (gdb_stdlog
, " ...");
1249 fprintf_unfiltered (gdb_stdlog
, "\n");
1252 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1256 fputc_unfiltered ('\n', gdb_stdlog
);
1259 /* Check implementations of to_xfer_partial update *XFERED_LEN
1260 properly. Do assertion after printing debug messages, so that we
1261 can find more clues on assertion failure from debugging messages. */
1262 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1263 gdb_assert (*xfered_len
> 0);
1268 /* Read LEN bytes of target memory at address MEMADDR, placing the
1269 results in GDB's memory at MYADDR. Returns either 0 for success or
1270 -1 if any error occurs.
1272 If an error occurs, no guarantee is made about the contents of the data at
1273 MYADDR. In particular, the caller should not depend upon partial reads
1274 filling the buffer with good data. There is no way for the caller to know
1275 how much good data might have been transfered anyway. Callers that can
1276 deal with partial reads should call target_read (which will retry until
1277 it makes no progress, and then return how much was transferred). */
1280 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1282 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1283 myaddr
, memaddr
, len
) == len
)
1289 /* See target/target.h. */
1292 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1297 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1300 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1301 gdbarch_byte_order (target_gdbarch ()));
1305 /* Like target_read_memory, but specify explicitly that this is a read
1306 from the target's raw memory. That is, this read bypasses the
1307 dcache, breakpoint shadowing, etc. */
1310 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1312 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1313 myaddr
, memaddr
, len
) == len
)
1319 /* Like target_read_memory, but specify explicitly that this is a read from
1320 the target's stack. This may trigger different cache behavior. */
1323 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1325 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1326 myaddr
, memaddr
, len
) == len
)
1332 /* Like target_read_memory, but specify explicitly that this is a read from
1333 the target's code. This may trigger different cache behavior. */
1336 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1338 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1339 myaddr
, memaddr
, len
) == len
)
1345 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1346 Returns either 0 for success or -1 if any error occurs. If an
1347 error occurs, no guarantee is made about how much data got written.
1348 Callers that can deal with partial writes should call
1352 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1354 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1355 myaddr
, memaddr
, len
) == len
)
1361 /* Write LEN bytes from MYADDR to target raw memory at address
1362 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1363 If an error occurs, no guarantee is made about how much data got
1364 written. Callers that can deal with partial writes should call
1368 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1370 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1371 myaddr
, memaddr
, len
) == len
)
1377 /* Fetch the target's memory map. */
1379 std::vector
<mem_region
>
1380 target_memory_map (void)
1382 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1383 if (result
.empty ())
1386 std::sort (result
.begin (), result
.end ());
1388 /* Check that regions do not overlap. Simultaneously assign
1389 a numbering for the "mem" commands to use to refer to
1391 mem_region
*last_one
= NULL
;
1392 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1394 mem_region
*this_one
= &result
[ix
];
1395 this_one
->number
= ix
;
1397 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1399 warning (_("Overlapping regions in memory map: ignoring"));
1400 return std::vector
<mem_region
> ();
1403 last_one
= this_one
;
1410 target_flash_erase (ULONGEST address
, LONGEST length
)
1412 current_top_target ()->flash_erase (address
, length
);
1416 target_flash_done (void)
1418 current_top_target ()->flash_done ();
1422 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1423 struct cmd_list_element
*c
, const char *value
)
1425 fprintf_filtered (file
,
1426 _("Mode for reading from readonly sections is %s.\n"),
1430 /* Target vector read/write partial wrapper functions. */
1432 static enum target_xfer_status
1433 target_read_partial (struct target_ops
*ops
,
1434 enum target_object object
,
1435 const char *annex
, gdb_byte
*buf
,
1436 ULONGEST offset
, ULONGEST len
,
1437 ULONGEST
*xfered_len
)
1439 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1443 static enum target_xfer_status
1444 target_write_partial (struct target_ops
*ops
,
1445 enum target_object object
,
1446 const char *annex
, const gdb_byte
*buf
,
1447 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1449 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1453 /* Wrappers to perform the full transfer. */
1455 /* For docs on target_read see target.h. */
1458 target_read (struct target_ops
*ops
,
1459 enum target_object object
,
1460 const char *annex
, gdb_byte
*buf
,
1461 ULONGEST offset
, LONGEST len
)
1463 LONGEST xfered_total
= 0;
1466 /* If we are reading from a memory object, find the length of an addressable
1467 unit for that architecture. */
1468 if (object
== TARGET_OBJECT_MEMORY
1469 || object
== TARGET_OBJECT_STACK_MEMORY
1470 || object
== TARGET_OBJECT_CODE_MEMORY
1471 || object
== TARGET_OBJECT_RAW_MEMORY
)
1472 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1474 while (xfered_total
< len
)
1476 ULONGEST xfered_partial
;
1477 enum target_xfer_status status
;
1479 status
= target_read_partial (ops
, object
, annex
,
1480 buf
+ xfered_total
* unit_size
,
1481 offset
+ xfered_total
, len
- xfered_total
,
1484 /* Call an observer, notifying them of the xfer progress? */
1485 if (status
== TARGET_XFER_EOF
)
1486 return xfered_total
;
1487 else if (status
== TARGET_XFER_OK
)
1489 xfered_total
+= xfered_partial
;
1493 return TARGET_XFER_E_IO
;
1499 /* Assuming that the entire [begin, end) range of memory cannot be
1500 read, try to read whatever subrange is possible to read.
1502 The function returns, in RESULT, either zero or one memory block.
1503 If there's a readable subrange at the beginning, it is completely
1504 read and returned. Any further readable subrange will not be read.
1505 Otherwise, if there's a readable subrange at the end, it will be
1506 completely read and returned. Any readable subranges before it
1507 (obviously, not starting at the beginning), will be ignored. In
1508 other cases -- either no readable subrange, or readable subrange(s)
1509 that is neither at the beginning, or end, nothing is returned.
1511 The purpose of this function is to handle a read across a boundary
1512 of accessible memory in a case when memory map is not available.
1513 The above restrictions are fine for this case, but will give
1514 incorrect results if the memory is 'patchy'. However, supporting
1515 'patchy' memory would require trying to read every single byte,
1516 and it seems unacceptable solution. Explicit memory map is
1517 recommended for this case -- and target_read_memory_robust will
1518 take care of reading multiple ranges then. */
1521 read_whatever_is_readable (struct target_ops
*ops
,
1522 const ULONGEST begin
, const ULONGEST end
,
1524 std::vector
<memory_read_result
> *result
)
1526 ULONGEST current_begin
= begin
;
1527 ULONGEST current_end
= end
;
1529 ULONGEST xfered_len
;
1531 /* If we previously failed to read 1 byte, nothing can be done here. */
1532 if (end
- begin
<= 1)
1535 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1537 /* Check that either first or the last byte is readable, and give up
1538 if not. This heuristic is meant to permit reading accessible memory
1539 at the boundary of accessible region. */
1540 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1541 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1546 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1547 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1548 &xfered_len
) == TARGET_XFER_OK
)
1556 /* Loop invariant is that the [current_begin, current_end) was previously
1557 found to be not readable as a whole.
1559 Note loop condition -- if the range has 1 byte, we can't divide the range
1560 so there's no point trying further. */
1561 while (current_end
- current_begin
> 1)
1563 ULONGEST first_half_begin
, first_half_end
;
1564 ULONGEST second_half_begin
, second_half_end
;
1566 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1570 first_half_begin
= current_begin
;
1571 first_half_end
= middle
;
1572 second_half_begin
= middle
;
1573 second_half_end
= current_end
;
1577 first_half_begin
= middle
;
1578 first_half_end
= current_end
;
1579 second_half_begin
= current_begin
;
1580 second_half_end
= middle
;
1583 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1584 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1586 first_half_end
- first_half_begin
);
1588 if (xfer
== first_half_end
- first_half_begin
)
1590 /* This half reads up fine. So, the error must be in the
1592 current_begin
= second_half_begin
;
1593 current_end
= second_half_end
;
1597 /* This half is not readable. Because we've tried one byte, we
1598 know some part of this half if actually readable. Go to the next
1599 iteration to divide again and try to read.
1601 We don't handle the other half, because this function only tries
1602 to read a single readable subrange. */
1603 current_begin
= first_half_begin
;
1604 current_end
= first_half_end
;
1610 /* The [begin, current_begin) range has been read. */
1611 result
->emplace_back (begin
, current_end
, std::move (buf
));
1615 /* The [current_end, end) range has been read. */
1616 LONGEST region_len
= end
- current_end
;
1618 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1619 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1620 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1621 region_len
* unit_size
);
1622 result
->emplace_back (current_end
, end
, std::move (data
));
1626 std::vector
<memory_read_result
>
1627 read_memory_robust (struct target_ops
*ops
,
1628 const ULONGEST offset
, const LONGEST len
)
1630 std::vector
<memory_read_result
> result
;
1631 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1633 LONGEST xfered_total
= 0;
1634 while (xfered_total
< len
)
1636 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1639 /* If there is no explicit region, a fake one should be created. */
1640 gdb_assert (region
);
1642 if (region
->hi
== 0)
1643 region_len
= len
- xfered_total
;
1645 region_len
= region
->hi
- offset
;
1647 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1649 /* Cannot read this region. Note that we can end up here only
1650 if the region is explicitly marked inaccessible, or
1651 'inaccessible-by-default' is in effect. */
1652 xfered_total
+= region_len
;
1656 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1657 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1658 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1660 LONGEST xfered_partial
=
1661 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1662 offset
+ xfered_total
, to_read
);
1663 /* Call an observer, notifying them of the xfer progress? */
1664 if (xfered_partial
<= 0)
1666 /* Got an error reading full chunk. See if maybe we can read
1668 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1669 offset
+ xfered_total
+ to_read
,
1670 unit_size
, &result
);
1671 xfered_total
+= to_read
;
1675 result
.emplace_back (offset
+ xfered_total
,
1676 offset
+ xfered_total
+ xfered_partial
,
1677 std::move (buffer
));
1678 xfered_total
+= xfered_partial
;
1688 /* An alternative to target_write with progress callbacks. */
1691 target_write_with_progress (struct target_ops
*ops
,
1692 enum target_object object
,
1693 const char *annex
, const gdb_byte
*buf
,
1694 ULONGEST offset
, LONGEST len
,
1695 void (*progress
) (ULONGEST
, void *), void *baton
)
1697 LONGEST xfered_total
= 0;
1700 /* If we are writing to a memory object, find the length of an addressable
1701 unit for that architecture. */
1702 if (object
== TARGET_OBJECT_MEMORY
1703 || object
== TARGET_OBJECT_STACK_MEMORY
1704 || object
== TARGET_OBJECT_CODE_MEMORY
1705 || object
== TARGET_OBJECT_RAW_MEMORY
)
1706 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1708 /* Give the progress callback a chance to set up. */
1710 (*progress
) (0, baton
);
1712 while (xfered_total
< len
)
1714 ULONGEST xfered_partial
;
1715 enum target_xfer_status status
;
1717 status
= target_write_partial (ops
, object
, annex
,
1718 buf
+ xfered_total
* unit_size
,
1719 offset
+ xfered_total
, len
- xfered_total
,
1722 if (status
!= TARGET_XFER_OK
)
1723 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1726 (*progress
) (xfered_partial
, baton
);
1728 xfered_total
+= xfered_partial
;
1734 /* For docs on target_write see target.h. */
1737 target_write (struct target_ops
*ops
,
1738 enum target_object object
,
1739 const char *annex
, const gdb_byte
*buf
,
1740 ULONGEST offset
, LONGEST len
)
1742 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1746 /* Help for target_read_alloc and target_read_stralloc. See their comments
1749 template <typename T
>
1750 gdb::optional
<gdb::def_vector
<T
>>
1751 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1754 gdb::def_vector
<T
> buf
;
1756 const int chunk
= 4096;
1758 /* This function does not have a length parameter; it reads the
1759 entire OBJECT). Also, it doesn't support objects fetched partly
1760 from one target and partly from another (in a different stratum,
1761 e.g. a core file and an executable). Both reasons make it
1762 unsuitable for reading memory. */
1763 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1765 /* Start by reading up to 4K at a time. The target will throttle
1766 this number down if necessary. */
1769 ULONGEST xfered_len
;
1770 enum target_xfer_status status
;
1772 buf
.resize (buf_pos
+ chunk
);
1774 status
= target_read_partial (ops
, object
, annex
,
1775 (gdb_byte
*) &buf
[buf_pos
],
1779 if (status
== TARGET_XFER_EOF
)
1781 /* Read all there was. */
1782 buf
.resize (buf_pos
);
1785 else if (status
!= TARGET_XFER_OK
)
1787 /* An error occurred. */
1791 buf_pos
+= xfered_len
;
1799 gdb::optional
<gdb::byte_vector
>
1800 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1803 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1808 gdb::optional
<gdb::char_vector
>
1809 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1812 gdb::optional
<gdb::char_vector
> buf
1813 = target_read_alloc_1
<char> (ops
, object
, annex
);
1818 if (buf
->empty () || buf
->back () != '\0')
1819 buf
->push_back ('\0');
1821 /* Check for embedded NUL bytes; but allow trailing NULs. */
1822 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1823 it
!= buf
->end (); it
++)
1826 warning (_("target object %d, annex %s, "
1827 "contained unexpected null characters"),
1828 (int) object
, annex
? annex
: "(none)");
1835 /* Memory transfer methods. */
1838 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1841 /* This method is used to read from an alternate, non-current
1842 target. This read must bypass the overlay support (as symbols
1843 don't match this target), and GDB's internal cache (wrong cache
1844 for this target). */
1845 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1847 memory_error (TARGET_XFER_E_IO
, addr
);
1851 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1852 int len
, enum bfd_endian byte_order
)
1854 gdb_byte buf
[sizeof (ULONGEST
)];
1856 gdb_assert (len
<= sizeof (buf
));
1857 get_target_memory (ops
, addr
, buf
, len
);
1858 return extract_unsigned_integer (buf
, len
, byte_order
);
1864 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1865 struct bp_target_info
*bp_tgt
)
1867 if (!may_insert_breakpoints
)
1869 warning (_("May not insert breakpoints"));
1873 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1879 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1880 struct bp_target_info
*bp_tgt
,
1881 enum remove_bp_reason reason
)
1883 /* This is kind of a weird case to handle, but the permission might
1884 have been changed after breakpoints were inserted - in which case
1885 we should just take the user literally and assume that any
1886 breakpoints should be left in place. */
1887 if (!may_insert_breakpoints
)
1889 warning (_("May not remove breakpoints"));
1893 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1897 info_target_command (const char *args
, int from_tty
)
1899 int has_all_mem
= 0;
1901 if (symfile_objfile
!= NULL
)
1902 printf_unfiltered (_("Symbols from \"%s\".\n"),
1903 objfile_name (symfile_objfile
));
1905 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1907 if (!t
->has_memory ())
1910 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1913 printf_unfiltered (_("\tWhile running this, "
1914 "GDB does not access memory from...\n"));
1915 printf_unfiltered ("%s:\n", t
->longname ());
1917 has_all_mem
= t
->has_all_memory ();
1921 /* This function is called before any new inferior is created, e.g.
1922 by running a program, attaching, or connecting to a target.
1923 It cleans up any state from previous invocations which might
1924 change between runs. This is a subset of what target_preopen
1925 resets (things which might change between targets). */
1928 target_pre_inferior (int from_tty
)
1930 /* Clear out solib state. Otherwise the solib state of the previous
1931 inferior might have survived and is entirely wrong for the new
1932 target. This has been observed on GNU/Linux using glibc 2.3. How
1944 Cannot access memory at address 0xdeadbeef
1947 /* In some OSs, the shared library list is the same/global/shared
1948 across inferiors. If code is shared between processes, so are
1949 memory regions and features. */
1950 if (!gdbarch_has_global_solist (target_gdbarch ()))
1952 no_shared_libraries (NULL
, from_tty
);
1954 invalidate_target_mem_regions ();
1956 target_clear_description ();
1959 /* attach_flag may be set if the previous process associated with
1960 the inferior was attached to. */
1961 current_inferior ()->attach_flag
= 0;
1963 current_inferior ()->highest_thread_num
= 0;
1965 agent_capability_invalidate ();
1968 /* This is to be called by the open routine before it does
1972 target_preopen (int from_tty
)
1976 if (current_inferior ()->pid
!= 0)
1979 || !target_has_execution
1980 || query (_("A program is being debugged already. Kill it? ")))
1982 /* Core inferiors actually should be detached, not
1984 if (target_has_execution
)
1987 target_detach (current_inferior (), 0);
1990 error (_("Program not killed."));
1993 /* Calling target_kill may remove the target from the stack. But if
1994 it doesn't (which seems like a win for UDI), remove it now. */
1995 /* Leave the exec target, though. The user may be switching from a
1996 live process to a core of the same program. */
1997 pop_all_targets_above (file_stratum
);
1999 target_pre_inferior (from_tty
);
2005 target_detach (inferior
*inf
, int from_tty
)
2007 /* After we have detached, we will clear the register cache for this inferior
2008 by calling registers_changed_ptid. We must save the pid_ptid before
2009 detaching, as the target detach method will clear inf->pid. */
2010 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2012 /* As long as some to_detach implementations rely on the current_inferior
2013 (either directly, or indirectly, like through target_gdbarch or by
2014 reading memory), INF needs to be the current inferior. When that
2015 requirement will become no longer true, then we can remove this
2017 gdb_assert (inf
== current_inferior ());
2019 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2020 /* Don't remove global breakpoints here. They're removed on
2021 disconnection from the target. */
2024 /* If we're in breakpoints-always-inserted mode, have to remove
2025 breakpoints before detaching. */
2026 remove_breakpoints_inf (current_inferior ());
2028 prepare_for_detach ();
2030 /* Hold a strong reference because detaching may unpush the
2032 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2034 current_top_target ()->detach (inf
, from_tty
);
2036 process_stratum_target
*proc_target
2037 = as_process_stratum_target (proc_target_ref
.get ());
2039 registers_changed_ptid (proc_target
, save_pid_ptid
);
2041 /* We have to ensure we have no frame cache left. Normally,
2042 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2043 inferior_ptid matches save_pid_ptid, but in our case, it does not
2044 call it, as inferior_ptid has been reset. */
2045 reinit_frame_cache ();
2049 target_disconnect (const char *args
, int from_tty
)
2051 /* If we're in breakpoints-always-inserted mode or if breakpoints
2052 are global across processes, we have to remove them before
2054 remove_breakpoints ();
2056 current_top_target ()->disconnect (args
, from_tty
);
2059 /* See target/target.h. */
2062 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2064 return current_top_target ()->wait (ptid
, status
, options
);
2070 default_target_wait (struct target_ops
*ops
,
2071 ptid_t ptid
, struct target_waitstatus
*status
,
2074 status
->kind
= TARGET_WAITKIND_IGNORE
;
2075 return minus_one_ptid
;
2079 target_pid_to_str (ptid_t ptid
)
2081 return current_top_target ()->pid_to_str (ptid
);
2085 target_thread_name (struct thread_info
*info
)
2087 gdb_assert (info
->inf
== current_inferior ());
2089 return current_top_target ()->thread_name (info
);
2092 struct thread_info
*
2093 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2095 struct inferior
*inf
)
2097 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2104 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2106 return current_top_target ()->thread_info_to_thread_handle (tip
);
2110 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2112 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2114 target_dcache_invalidate ();
2116 current_top_target ()->resume (ptid
, step
, signal
);
2118 registers_changed_ptid (curr_target
, ptid
);
2119 /* We only set the internal executing state here. The user/frontend
2120 running state is set at a higher level. This also clears the
2121 thread's stop_pc as side effect. */
2122 set_executing (curr_target
, ptid
, 1);
2123 clear_inline_frame_state (curr_target
, ptid
);
2126 /* If true, target_commit_resume is a nop. */
2127 static int defer_target_commit_resume
;
2132 target_commit_resume (void)
2134 if (defer_target_commit_resume
)
2137 current_top_target ()->commit_resume ();
2142 scoped_restore_tmpl
<int>
2143 make_scoped_defer_target_commit_resume ()
2145 return make_scoped_restore (&defer_target_commit_resume
, 1);
2149 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2151 current_top_target ()->pass_signals (pass_signals
);
2155 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2157 current_top_target ()->program_signals (program_signals
);
2161 default_follow_fork (struct target_ops
*self
, int follow_child
,
2164 /* Some target returned a fork event, but did not know how to follow it. */
2165 internal_error (__FILE__
, __LINE__
,
2166 _("could not find a target to follow fork"));
2169 /* Look through the list of possible targets for a target that can
2173 target_follow_fork (int follow_child
, int detach_fork
)
2175 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2178 /* Target wrapper for follow exec hook. */
2181 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2183 current_top_target ()->follow_exec (inf
, execd_pathname
);
2187 default_mourn_inferior (struct target_ops
*self
)
2189 internal_error (__FILE__
, __LINE__
,
2190 _("could not find a target to follow mourn inferior"));
2194 target_mourn_inferior (ptid_t ptid
)
2196 gdb_assert (ptid
== inferior_ptid
);
2197 current_top_target ()->mourn_inferior ();
2199 /* We no longer need to keep handles on any of the object files.
2200 Make sure to release them to avoid unnecessarily locking any
2201 of them while we're not actually debugging. */
2202 bfd_cache_close_all ();
2205 /* Look for a target which can describe architectural features, starting
2206 from TARGET. If we find one, return its description. */
2208 const struct target_desc
*
2209 target_read_description (struct target_ops
*target
)
2211 return target
->read_description ();
2214 /* This implements a basic search of memory, reading target memory and
2215 performing the search here (as opposed to performing the search in on the
2216 target side with, for example, gdbserver). */
2219 simple_search_memory (struct target_ops
*ops
,
2220 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2221 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2222 CORE_ADDR
*found_addrp
)
2224 /* NOTE: also defined in find.c testcase. */
2225 #define SEARCH_CHUNK_SIZE 16000
2226 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2227 /* Buffer to hold memory contents for searching. */
2228 unsigned search_buf_size
;
2230 search_buf_size
= chunk_size
+ pattern_len
- 1;
2232 /* No point in trying to allocate a buffer larger than the search space. */
2233 if (search_space_len
< search_buf_size
)
2234 search_buf_size
= search_space_len
;
2236 gdb::byte_vector
search_buf (search_buf_size
);
2238 /* Prime the search buffer. */
2240 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2241 search_buf
.data (), start_addr
, search_buf_size
)
2244 warning (_("Unable to access %s bytes of target "
2245 "memory at %s, halting search."),
2246 pulongest (search_buf_size
), hex_string (start_addr
));
2250 /* Perform the search.
2252 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2253 When we've scanned N bytes we copy the trailing bytes to the start and
2254 read in another N bytes. */
2256 while (search_space_len
>= pattern_len
)
2258 gdb_byte
*found_ptr
;
2259 unsigned nr_search_bytes
2260 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2262 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2263 pattern
, pattern_len
);
2265 if (found_ptr
!= NULL
)
2267 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2269 *found_addrp
= found_addr
;
2273 /* Not found in this chunk, skip to next chunk. */
2275 /* Don't let search_space_len wrap here, it's unsigned. */
2276 if (search_space_len
>= chunk_size
)
2277 search_space_len
-= chunk_size
;
2279 search_space_len
= 0;
2281 if (search_space_len
>= pattern_len
)
2283 unsigned keep_len
= search_buf_size
- chunk_size
;
2284 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2287 /* Copy the trailing part of the previous iteration to the front
2288 of the buffer for the next iteration. */
2289 gdb_assert (keep_len
== pattern_len
- 1);
2290 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2292 nr_to_read
= std::min (search_space_len
- keep_len
,
2293 (ULONGEST
) chunk_size
);
2295 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2296 &search_buf
[keep_len
], read_addr
,
2297 nr_to_read
) != nr_to_read
)
2299 warning (_("Unable to access %s bytes of target "
2300 "memory at %s, halting search."),
2301 plongest (nr_to_read
),
2302 hex_string (read_addr
));
2306 start_addr
+= chunk_size
;
2315 /* Default implementation of memory-searching. */
2318 default_search_memory (struct target_ops
*self
,
2319 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2320 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2321 CORE_ADDR
*found_addrp
)
2323 /* Start over from the top of the target stack. */
2324 return simple_search_memory (current_top_target (),
2325 start_addr
, search_space_len
,
2326 pattern
, pattern_len
, found_addrp
);
2329 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2330 sequence of bytes in PATTERN with length PATTERN_LEN.
2332 The result is 1 if found, 0 if not found, and -1 if there was an error
2333 requiring halting of the search (e.g. memory read error).
2334 If the pattern is found the address is recorded in FOUND_ADDRP. */
2337 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2338 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2339 CORE_ADDR
*found_addrp
)
2341 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2342 pattern
, pattern_len
, found_addrp
);
2345 /* Look through the currently pushed targets. If none of them will
2346 be able to restart the currently running process, issue an error
2350 target_require_runnable (void)
2352 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2354 /* If this target knows how to create a new program, then
2355 assume we will still be able to after killing the current
2356 one. Either killing and mourning will not pop T, or else
2357 find_default_run_target will find it again. */
2358 if (t
->can_create_inferior ())
2361 /* Do not worry about targets at certain strata that can not
2362 create inferiors. Assume they will be pushed again if
2363 necessary, and continue to the process_stratum. */
2364 if (t
->stratum () > process_stratum
)
2367 error (_("The \"%s\" target does not support \"run\". "
2368 "Try \"help target\" or \"continue\"."),
2372 /* This function is only called if the target is running. In that
2373 case there should have been a process_stratum target and it
2374 should either know how to create inferiors, or not... */
2375 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2378 /* Whether GDB is allowed to fall back to the default run target for
2379 "run", "attach", etc. when no target is connected yet. */
2380 static bool auto_connect_native_target
= true;
2383 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2384 struct cmd_list_element
*c
, const char *value
)
2386 fprintf_filtered (file
,
2387 _("Whether GDB may automatically connect to the "
2388 "native target is %s.\n"),
2392 /* A pointer to the target that can respond to "run" or "attach".
2393 Native targets are always singletons and instantiated early at GDB
2395 static target_ops
*the_native_target
;
2400 set_native_target (target_ops
*target
)
2402 if (the_native_target
!= NULL
)
2403 internal_error (__FILE__
, __LINE__
,
2404 _("native target already set (\"%s\")."),
2405 the_native_target
->longname ());
2407 the_native_target
= target
;
2413 get_native_target ()
2415 return the_native_target
;
2418 /* Look through the list of possible targets for a target that can
2419 execute a run or attach command without any other data. This is
2420 used to locate the default process stratum.
2422 If DO_MESG is not NULL, the result is always valid (error() is
2423 called for errors); else, return NULL on error. */
2425 static struct target_ops
*
2426 find_default_run_target (const char *do_mesg
)
2428 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2429 return the_native_target
;
2431 if (do_mesg
!= NULL
)
2432 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2439 find_attach_target (void)
2441 /* If a target on the current stack can attach, use it. */
2442 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2444 if (t
->can_attach ())
2448 /* Otherwise, use the default run target for attaching. */
2449 return find_default_run_target ("attach");
2455 find_run_target (void)
2457 /* If a target on the current stack can run, use it. */
2458 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2460 if (t
->can_create_inferior ())
2464 /* Otherwise, use the default run target. */
2465 return find_default_run_target ("run");
2469 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2474 /* Implement the "info proc" command. */
2477 target_info_proc (const char *args
, enum info_proc_what what
)
2479 struct target_ops
*t
;
2481 /* If we're already connected to something that can get us OS
2482 related data, use it. Otherwise, try using the native
2484 t
= find_target_at (process_stratum
);
2486 t
= find_default_run_target (NULL
);
2488 for (; t
!= NULL
; t
= t
->beneath ())
2490 if (t
->info_proc (args
, what
))
2493 fprintf_unfiltered (gdb_stdlog
,
2494 "target_info_proc (\"%s\", %d)\n", args
, what
);
2504 find_default_supports_disable_randomization (struct target_ops
*self
)
2506 struct target_ops
*t
;
2508 t
= find_default_run_target (NULL
);
2510 return t
->supports_disable_randomization ();
2515 target_supports_disable_randomization (void)
2517 return current_top_target ()->supports_disable_randomization ();
2520 /* See target/target.h. */
2523 target_supports_multi_process (void)
2525 return current_top_target ()->supports_multi_process ();
2530 gdb::optional
<gdb::char_vector
>
2531 target_get_osdata (const char *type
)
2533 struct target_ops
*t
;
2535 /* If we're already connected to something that can get us OS
2536 related data, use it. Otherwise, try using the native
2538 t
= find_target_at (process_stratum
);
2540 t
= find_default_run_target ("get OS data");
2545 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2548 /* Determine the current address space of thread PTID. */
2550 struct address_space
*
2551 target_thread_address_space (ptid_t ptid
)
2553 struct address_space
*aspace
;
2555 aspace
= current_top_target ()->thread_address_space (ptid
);
2556 gdb_assert (aspace
!= NULL
);
2564 target_ops::beneath () const
2566 return current_inferior ()->find_target_beneath (this);
2570 target_ops::close ()
2575 target_ops::can_attach ()
2581 target_ops::attach (const char *, int)
2583 gdb_assert_not_reached ("target_ops::attach called");
2587 target_ops::can_create_inferior ()
2593 target_ops::create_inferior (const char *, const std::string
&,
2596 gdb_assert_not_reached ("target_ops::create_inferior called");
2600 target_ops::can_run ()
2608 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2617 /* Target file operations. */
2619 static struct target_ops
*
2620 default_fileio_target (void)
2622 struct target_ops
*t
;
2624 /* If we're already connected to something that can perform
2625 file I/O, use it. Otherwise, try using the native target. */
2626 t
= find_target_at (process_stratum
);
2629 return find_default_run_target ("file I/O");
2632 /* File handle for target file operations. */
2636 /* The target on which this file is open. NULL if the target is
2637 meanwhile closed while the handle is open. */
2640 /* The file descriptor on the target. */
2643 /* Check whether this fileio_fh_t represents a closed file. */
2646 return target_fd
< 0;
2650 /* Vector of currently open file handles. The value returned by
2651 target_fileio_open and passed as the FD argument to other
2652 target_fileio_* functions is an index into this vector. This
2653 vector's entries are never freed; instead, files are marked as
2654 closed, and the handle becomes available for reuse. */
2655 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2657 /* Index into fileio_fhandles of the lowest handle that might be
2658 closed. This permits handle reuse without searching the whole
2659 list each time a new file is opened. */
2660 static int lowest_closed_fd
;
2662 /* Invalidate the target associated with open handles that were open
2663 on target TARG, since we're about to close (and maybe destroy) the
2664 target. The handles remain open from the client's perspective, but
2665 trying to do anything with them other than closing them will fail
2669 fileio_handles_invalidate_target (target_ops
*targ
)
2671 for (fileio_fh_t
&fh
: fileio_fhandles
)
2672 if (fh
.target
== targ
)
2676 /* Acquire a target fileio file descriptor. */
2679 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2681 /* Search for closed handles to reuse. */
2682 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2684 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2686 if (fh
.is_closed ())
2690 /* Push a new handle if no closed handles were found. */
2691 if (lowest_closed_fd
== fileio_fhandles
.size ())
2692 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2694 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2696 /* Should no longer be marked closed. */
2697 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2699 /* Return its index, and start the next lookup at
2701 return lowest_closed_fd
++;
2704 /* Release a target fileio file descriptor. */
2707 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2710 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2713 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2715 static fileio_fh_t
*
2716 fileio_fd_to_fh (int fd
)
2718 return &fileio_fhandles
[fd
];
2722 /* Default implementations of file i/o methods. We don't want these
2723 to delegate automatically, because we need to know which target
2724 supported the method, in order to call it directly from within
2725 pread/pwrite, etc. */
2728 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2729 int flags
, int mode
, int warn_if_slow
,
2732 *target_errno
= FILEIO_ENOSYS
;
2737 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2738 ULONGEST offset
, int *target_errno
)
2740 *target_errno
= FILEIO_ENOSYS
;
2745 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2746 ULONGEST offset
, int *target_errno
)
2748 *target_errno
= FILEIO_ENOSYS
;
2753 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2755 *target_errno
= FILEIO_ENOSYS
;
2760 target_ops::fileio_close (int fd
, int *target_errno
)
2762 *target_errno
= FILEIO_ENOSYS
;
2767 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2770 *target_errno
= FILEIO_ENOSYS
;
2774 gdb::optional
<std::string
>
2775 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2778 *target_errno
= FILEIO_ENOSYS
;
2782 /* Helper for target_fileio_open and
2783 target_fileio_open_warn_if_slow. */
2786 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2787 int flags
, int mode
, int warn_if_slow
,
2790 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2792 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2793 warn_if_slow
, target_errno
);
2795 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2801 fd
= acquire_fileio_fd (t
, fd
);
2804 fprintf_unfiltered (gdb_stdlog
,
2805 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2807 inf
== NULL
? 0 : inf
->num
,
2808 filename
, flags
, mode
,
2810 fd
!= -1 ? 0 : *target_errno
);
2814 *target_errno
= FILEIO_ENOSYS
;
2821 target_fileio_open (struct inferior
*inf
, const char *filename
,
2822 int flags
, int mode
, int *target_errno
)
2824 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2831 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2832 const char *filename
,
2833 int flags
, int mode
, int *target_errno
)
2835 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2842 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2843 ULONGEST offset
, int *target_errno
)
2845 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2848 if (fh
->is_closed ())
2849 *target_errno
= EBADF
;
2850 else if (fh
->target
== NULL
)
2851 *target_errno
= EIO
;
2853 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2854 len
, offset
, target_errno
);
2857 fprintf_unfiltered (gdb_stdlog
,
2858 "target_fileio_pwrite (%d,...,%d,%s) "
2860 fd
, len
, pulongest (offset
),
2861 ret
, ret
!= -1 ? 0 : *target_errno
);
2868 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2869 ULONGEST offset
, int *target_errno
)
2871 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2874 if (fh
->is_closed ())
2875 *target_errno
= EBADF
;
2876 else if (fh
->target
== NULL
)
2877 *target_errno
= EIO
;
2879 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2880 len
, offset
, target_errno
);
2883 fprintf_unfiltered (gdb_stdlog
,
2884 "target_fileio_pread (%d,...,%d,%s) "
2886 fd
, len
, pulongest (offset
),
2887 ret
, ret
!= -1 ? 0 : *target_errno
);
2894 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2896 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2899 if (fh
->is_closed ())
2900 *target_errno
= EBADF
;
2901 else if (fh
->target
== NULL
)
2902 *target_errno
= EIO
;
2904 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2907 fprintf_unfiltered (gdb_stdlog
,
2908 "target_fileio_fstat (%d) = %d (%d)\n",
2909 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2916 target_fileio_close (int fd
, int *target_errno
)
2918 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2921 if (fh
->is_closed ())
2922 *target_errno
= EBADF
;
2925 if (fh
->target
!= NULL
)
2926 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2930 release_fileio_fd (fd
, fh
);
2934 fprintf_unfiltered (gdb_stdlog
,
2935 "target_fileio_close (%d) = %d (%d)\n",
2936 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2943 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2946 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2948 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2950 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2954 fprintf_unfiltered (gdb_stdlog
,
2955 "target_fileio_unlink (%d,%s)"
2957 inf
== NULL
? 0 : inf
->num
, filename
,
2958 ret
, ret
!= -1 ? 0 : *target_errno
);
2962 *target_errno
= FILEIO_ENOSYS
;
2968 gdb::optional
<std::string
>
2969 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2972 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2974 gdb::optional
<std::string
> ret
2975 = t
->fileio_readlink (inf
, filename
, target_errno
);
2977 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2981 fprintf_unfiltered (gdb_stdlog
,
2982 "target_fileio_readlink (%d,%s)"
2984 inf
== NULL
? 0 : inf
->num
,
2985 filename
, ret
? ret
->c_str () : "(nil)",
2986 ret
? 0 : *target_errno
);
2990 *target_errno
= FILEIO_ENOSYS
;
2994 /* Like scoped_fd, but specific to target fileio. */
2996 class scoped_target_fd
2999 explicit scoped_target_fd (int fd
) noexcept
3004 ~scoped_target_fd ()
3010 target_fileio_close (m_fd
, &target_errno
);
3014 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3016 int get () const noexcept
3025 /* Read target file FILENAME, in the filesystem as seen by INF. If
3026 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3027 remote targets, the remote stub). Store the result in *BUF_P and
3028 return the size of the transferred data. PADDING additional bytes
3029 are available in *BUF_P. This is a helper function for
3030 target_fileio_read_alloc; see the declaration of that function for
3031 more information. */
3034 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3035 gdb_byte
**buf_p
, int padding
)
3037 size_t buf_alloc
, buf_pos
;
3042 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3043 0700, &target_errno
));
3044 if (fd
.get () == -1)
3047 /* Start by reading up to 4K at a time. The target will throttle
3048 this number down if necessary. */
3050 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3054 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3055 buf_alloc
- buf_pos
- padding
, buf_pos
,
3059 /* An error occurred. */
3065 /* Read all there was. */
3075 /* If the buffer is filling up, expand it. */
3076 if (buf_alloc
< buf_pos
* 2)
3079 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3089 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3092 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3097 gdb::unique_xmalloc_ptr
<char>
3098 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3102 LONGEST i
, transferred
;
3104 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3105 bufstr
= (char *) buffer
;
3107 if (transferred
< 0)
3108 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3110 if (transferred
== 0)
3111 return make_unique_xstrdup ("");
3113 bufstr
[transferred
] = 0;
3115 /* Check for embedded NUL bytes; but allow trailing NULs. */
3116 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3119 warning (_("target file %s "
3120 "contained unexpected null characters"),
3125 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3130 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3131 CORE_ADDR addr
, int len
)
3133 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3137 default_watchpoint_addr_within_range (struct target_ops
*target
,
3139 CORE_ADDR start
, int length
)
3141 return addr
>= start
&& addr
< start
+ length
;
3147 target_stack::find_beneath (const target_ops
*t
) const
3149 /* Look for a non-empty slot at stratum levels beneath T's. */
3150 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3151 if (m_stack
[stratum
] != NULL
)
3152 return m_stack
[stratum
];
3160 find_target_at (enum strata stratum
)
3162 return current_inferior ()->target_at (stratum
);
3170 target_announce_detach (int from_tty
)
3173 const char *exec_file
;
3178 exec_file
= get_exec_file (0);
3179 if (exec_file
== NULL
)
3182 pid
= inferior_ptid
.pid ();
3183 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3184 target_pid_to_str (ptid_t (pid
)).c_str ());
3187 /* The inferior process has died. Long live the inferior! */
3190 generic_mourn_inferior (void)
3192 inferior
*inf
= current_inferior ();
3194 inferior_ptid
= null_ptid
;
3196 /* Mark breakpoints uninserted in case something tries to delete a
3197 breakpoint while we delete the inferior's threads (which would
3198 fail, since the inferior is long gone). */
3199 mark_breakpoints_out ();
3202 exit_inferior (inf
);
3204 /* Note this wipes step-resume breakpoints, so needs to be done
3205 after exit_inferior, which ends up referencing the step-resume
3206 breakpoints through clear_thread_inferior_resources. */
3207 breakpoint_init_inferior (inf_exited
);
3209 registers_changed ();
3211 reopen_exec_file ();
3212 reinit_frame_cache ();
3214 if (deprecated_detach_hook
)
3215 deprecated_detach_hook ();
3218 /* Convert a normal process ID to a string. Returns the string in a
3222 normal_pid_to_str (ptid_t ptid
)
3224 return string_printf ("process %d", ptid
.pid ());
3228 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3230 return normal_pid_to_str (ptid
);
3233 /* Error-catcher for target_find_memory_regions. */
3235 dummy_find_memory_regions (struct target_ops
*self
,
3236 find_memory_region_ftype ignore1
, void *ignore2
)
3238 error (_("Command not implemented for this target."));
3242 /* Error-catcher for target_make_corefile_notes. */
3244 dummy_make_corefile_notes (struct target_ops
*self
,
3245 bfd
*ignore1
, int *ignore2
)
3247 error (_("Command not implemented for this target."));
3251 #include "target-delegates.c"
3253 /* The initial current target, so that there is always a semi-valid
3256 static dummy_target the_dummy_target
;
3263 return &the_dummy_target
;
3266 static const target_info dummy_target_info
= {
3273 dummy_target::stratum () const
3275 return dummy_stratum
;
3279 debug_target::stratum () const
3281 return debug_stratum
;
3285 dummy_target::info () const
3287 return dummy_target_info
;
3291 debug_target::info () const
3293 return beneath ()->info ();
3299 target_close (struct target_ops
*targ
)
3301 gdb_assert (!target_is_pushed (targ
));
3303 fileio_handles_invalidate_target (targ
);
3308 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3312 target_thread_alive (ptid_t ptid
)
3314 return current_top_target ()->thread_alive (ptid
);
3318 target_update_thread_list (void)
3320 current_top_target ()->update_thread_list ();
3324 target_stop (ptid_t ptid
)
3328 warning (_("May not interrupt or stop the target, ignoring attempt"));
3332 current_top_target ()->stop (ptid
);
3340 warning (_("May not interrupt or stop the target, ignoring attempt"));
3344 current_top_target ()->interrupt ();
3350 target_pass_ctrlc (void)
3352 /* Pass the Ctrl-C to the first target that has a thread
3354 for (inferior
*inf
: all_inferiors ())
3356 target_ops
*proc_target
= inf
->process_target ();
3357 if (proc_target
== NULL
)
3360 for (thread_info
*thr
: inf
->threads ())
3362 /* A thread can be THREAD_STOPPED and executing, while
3363 running an infcall. */
3364 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3366 /* We can get here quite deep in target layers. Avoid
3367 switching thread context or anything that would
3368 communicate with the target (e.g., to fetch
3369 registers), or flushing e.g., the frame cache. We
3370 just switch inferior in order to be able to call
3371 through the target_stack. */
3372 scoped_restore_current_inferior restore_inferior
;
3373 set_current_inferior (inf
);
3374 current_top_target ()->pass_ctrlc ();
3384 default_target_pass_ctrlc (struct target_ops
*ops
)
3386 target_interrupt ();
3389 /* See target/target.h. */
3392 target_stop_and_wait (ptid_t ptid
)
3394 struct target_waitstatus status
;
3395 bool was_non_stop
= non_stop
;
3400 memset (&status
, 0, sizeof (status
));
3401 target_wait (ptid
, &status
, 0);
3403 non_stop
= was_non_stop
;
3406 /* See target/target.h. */
3409 target_continue_no_signal (ptid_t ptid
)
3411 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3414 /* See target/target.h. */
3417 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3419 target_resume (ptid
, 0, signal
);
3422 /* Concatenate ELEM to LIST, a comma-separated list. */
3425 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3427 if (!list
->empty ())
3428 list
->append (", ");
3430 list
->append (elem
);
3433 /* Helper for target_options_to_string. If OPT is present in
3434 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3435 OPT is removed from TARGET_OPTIONS. */
3438 do_option (int *target_options
, std::string
*ret
,
3439 int opt
, const char *opt_str
)
3441 if ((*target_options
& opt
) != 0)
3443 str_comma_list_concat_elem (ret
, opt_str
);
3444 *target_options
&= ~opt
;
3451 target_options_to_string (int target_options
)
3455 #define DO_TARG_OPTION(OPT) \
3456 do_option (&target_options, &ret, OPT, #OPT)
3458 DO_TARG_OPTION (TARGET_WNOHANG
);
3460 if (target_options
!= 0)
3461 str_comma_list_concat_elem (&ret
, "unknown???");
3467 target_fetch_registers (struct regcache
*regcache
, int regno
)
3469 current_top_target ()->fetch_registers (regcache
, regno
);
3471 regcache
->debug_print_register ("target_fetch_registers", regno
);
3475 target_store_registers (struct regcache
*regcache
, int regno
)
3477 if (!may_write_registers
)
3478 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3480 current_top_target ()->store_registers (regcache
, regno
);
3483 regcache
->debug_print_register ("target_store_registers", regno
);
3488 target_core_of_thread (ptid_t ptid
)
3490 return current_top_target ()->core_of_thread (ptid
);
3494 simple_verify_memory (struct target_ops
*ops
,
3495 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3497 LONGEST total_xfered
= 0;
3499 while (total_xfered
< size
)
3501 ULONGEST xfered_len
;
3502 enum target_xfer_status status
;
3504 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3506 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3507 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3509 if (status
== TARGET_XFER_OK
3510 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3512 total_xfered
+= xfered_len
;
3521 /* Default implementation of memory verification. */
3524 default_verify_memory (struct target_ops
*self
,
3525 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3527 /* Start over from the top of the target stack. */
3528 return simple_verify_memory (current_top_target (),
3529 data
, memaddr
, size
);
3533 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3535 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3538 /* The documentation for this function is in its prototype declaration in
3542 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3543 enum target_hw_bp_type rw
)
3545 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3548 /* The documentation for this function is in its prototype declaration in
3552 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3553 enum target_hw_bp_type rw
)
3555 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3558 /* The documentation for this function is in its prototype declaration
3562 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3564 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3567 /* The documentation for this function is in its prototype declaration
3571 target_ranged_break_num_registers (void)
3573 return current_top_target ()->ranged_break_num_registers ();
3578 struct btrace_target_info
*
3579 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3581 return current_top_target ()->enable_btrace (ptid
, conf
);
3587 target_disable_btrace (struct btrace_target_info
*btinfo
)
3589 current_top_target ()->disable_btrace (btinfo
);
3595 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3597 current_top_target ()->teardown_btrace (btinfo
);
3603 target_read_btrace (struct btrace_data
*btrace
,
3604 struct btrace_target_info
*btinfo
,
3605 enum btrace_read_type type
)
3607 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3612 const struct btrace_config
*
3613 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3615 return current_top_target ()->btrace_conf (btinfo
);
3621 target_stop_recording (void)
3623 current_top_target ()->stop_recording ();
3629 target_save_record (const char *filename
)
3631 current_top_target ()->save_record (filename
);
3637 target_supports_delete_record ()
3639 return current_top_target ()->supports_delete_record ();
3645 target_delete_record (void)
3647 current_top_target ()->delete_record ();
3653 target_record_method (ptid_t ptid
)
3655 return current_top_target ()->record_method (ptid
);
3661 target_record_is_replaying (ptid_t ptid
)
3663 return current_top_target ()->record_is_replaying (ptid
);
3669 target_record_will_replay (ptid_t ptid
, int dir
)
3671 return current_top_target ()->record_will_replay (ptid
, dir
);
3677 target_record_stop_replaying (void)
3679 current_top_target ()->record_stop_replaying ();
3685 target_goto_record_begin (void)
3687 current_top_target ()->goto_record_begin ();
3693 target_goto_record_end (void)
3695 current_top_target ()->goto_record_end ();
3701 target_goto_record (ULONGEST insn
)
3703 current_top_target ()->goto_record (insn
);
3709 target_insn_history (int size
, gdb_disassembly_flags flags
)
3711 current_top_target ()->insn_history (size
, flags
);
3717 target_insn_history_from (ULONGEST from
, int size
,
3718 gdb_disassembly_flags flags
)
3720 current_top_target ()->insn_history_from (from
, size
, flags
);
3726 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3727 gdb_disassembly_flags flags
)
3729 current_top_target ()->insn_history_range (begin
, end
, flags
);
3735 target_call_history (int size
, record_print_flags flags
)
3737 current_top_target ()->call_history (size
, flags
);
3743 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3745 current_top_target ()->call_history_from (begin
, size
, flags
);
3751 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3753 current_top_target ()->call_history_range (begin
, end
, flags
);
3758 const struct frame_unwind
*
3759 target_get_unwinder (void)
3761 return current_top_target ()->get_unwinder ();
3766 const struct frame_unwind
*
3767 target_get_tailcall_unwinder (void)
3769 return current_top_target ()->get_tailcall_unwinder ();
3775 target_prepare_to_generate_core (void)
3777 current_top_target ()->prepare_to_generate_core ();
3783 target_done_generating_core (void)
3785 current_top_target ()->done_generating_core ();
3790 static char targ_desc
[] =
3791 "Names of targets and files being debugged.\nShows the entire \
3792 stack of targets currently in use (including the exec-file,\n\
3793 core-file, and process, if any), as well as the symbol file name.";
3796 default_rcmd (struct target_ops
*self
, const char *command
,
3797 struct ui_file
*output
)
3799 error (_("\"monitor\" command not supported by this target."));
3803 do_monitor_command (const char *cmd
, int from_tty
)
3805 target_rcmd (cmd
, gdb_stdtarg
);
3808 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3812 flash_erase_command (const char *cmd
, int from_tty
)
3814 /* Used to communicate termination of flash operations to the target. */
3815 bool found_flash_region
= false;
3816 struct gdbarch
*gdbarch
= target_gdbarch ();
3818 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3820 /* Iterate over all memory regions. */
3821 for (const mem_region
&m
: mem_regions
)
3823 /* Is this a flash memory region? */
3824 if (m
.attrib
.mode
== MEM_FLASH
)
3826 found_flash_region
= true;
3827 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3829 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3831 current_uiout
->message (_("Erasing flash memory region at address "));
3832 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3833 current_uiout
->message (", size = ");
3834 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3835 current_uiout
->message ("\n");
3839 /* Did we do any flash operations? If so, we need to finalize them. */
3840 if (found_flash_region
)
3841 target_flash_done ();
3843 current_uiout
->message (_("No flash memory regions found.\n"));
3846 /* Print the name of each layers of our target stack. */
3849 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3851 printf_filtered (_("The current target stack is:\n"));
3853 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3855 if (t
->stratum () == debug_stratum
)
3857 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3864 target_async (int enable
)
3866 infrun_async (enable
);
3867 current_top_target ()->async (enable
);
3873 target_thread_events (int enable
)
3875 current_top_target ()->thread_events (enable
);
3878 /* Controls if targets can report that they can/are async. This is
3879 just for maintainers to use when debugging gdb. */
3880 bool target_async_permitted
= true;
3882 /* The set command writes to this variable. If the inferior is
3883 executing, target_async_permitted is *not* updated. */
3884 static bool target_async_permitted_1
= true;
3887 maint_set_target_async_command (const char *args
, int from_tty
,
3888 struct cmd_list_element
*c
)
3890 if (have_live_inferiors ())
3892 target_async_permitted_1
= target_async_permitted
;
3893 error (_("Cannot change this setting while the inferior is running."));
3896 target_async_permitted
= target_async_permitted_1
;
3900 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3901 struct cmd_list_element
*c
,
3904 fprintf_filtered (file
,
3905 _("Controlling the inferior in "
3906 "asynchronous mode is %s.\n"), value
);
3909 /* Return true if the target operates in non-stop mode even with "set
3913 target_always_non_stop_p (void)
3915 return current_top_target ()->always_non_stop_p ();
3921 target_is_non_stop_p (void)
3924 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3925 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3926 && target_always_non_stop_p ()));
3929 /* Controls if targets can report that they always run in non-stop
3930 mode. This is just for maintainers to use when debugging gdb. */
3931 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3933 /* The set command writes to this variable. If the inferior is
3934 executing, target_non_stop_enabled is *not* updated. */
3935 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3937 /* Implementation of "maint set target-non-stop". */
3940 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3941 struct cmd_list_element
*c
)
3943 if (have_live_inferiors ())
3945 target_non_stop_enabled_1
= target_non_stop_enabled
;
3946 error (_("Cannot change this setting while the inferior is running."));
3949 target_non_stop_enabled
= target_non_stop_enabled_1
;
3952 /* Implementation of "maint show target-non-stop". */
3955 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3956 struct cmd_list_element
*c
,
3959 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3960 fprintf_filtered (file
,
3961 _("Whether the target is always in non-stop mode "
3962 "is %s (currently %s).\n"), value
,
3963 target_always_non_stop_p () ? "on" : "off");
3965 fprintf_filtered (file
,
3966 _("Whether the target is always in non-stop mode "
3967 "is %s.\n"), value
);
3970 /* Temporary copies of permission settings. */
3972 static bool may_write_registers_1
= true;
3973 static bool may_write_memory_1
= true;
3974 static bool may_insert_breakpoints_1
= true;
3975 static bool may_insert_tracepoints_1
= true;
3976 static bool may_insert_fast_tracepoints_1
= true;
3977 static bool may_stop_1
= true;
3979 /* Make the user-set values match the real values again. */
3982 update_target_permissions (void)
3984 may_write_registers_1
= may_write_registers
;
3985 may_write_memory_1
= may_write_memory
;
3986 may_insert_breakpoints_1
= may_insert_breakpoints
;
3987 may_insert_tracepoints_1
= may_insert_tracepoints
;
3988 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3989 may_stop_1
= may_stop
;
3992 /* The one function handles (most of) the permission flags in the same
3996 set_target_permissions (const char *args
, int from_tty
,
3997 struct cmd_list_element
*c
)
3999 if (target_has_execution
)
4001 update_target_permissions ();
4002 error (_("Cannot change this setting while the inferior is running."));
4005 /* Make the real values match the user-changed values. */
4006 may_write_registers
= may_write_registers_1
;
4007 may_insert_breakpoints
= may_insert_breakpoints_1
;
4008 may_insert_tracepoints
= may_insert_tracepoints_1
;
4009 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4010 may_stop
= may_stop_1
;
4011 update_observer_mode ();
4014 /* Set memory write permission independently of observer mode. */
4017 set_write_memory_permission (const char *args
, int from_tty
,
4018 struct cmd_list_element
*c
)
4020 /* Make the real values match the user-changed values. */
4021 may_write_memory
= may_write_memory_1
;
4022 update_observer_mode ();
4026 _initialize_target ()
4028 the_debug_target
= new debug_target ();
4030 add_info ("target", info_target_command
, targ_desc
);
4031 add_info ("files", info_target_command
, targ_desc
);
4033 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4034 Set target debugging."), _("\
4035 Show target debugging."), _("\
4036 When non-zero, target debugging is enabled. Higher numbers are more\n\
4040 &setdebuglist
, &showdebuglist
);
4042 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4043 &trust_readonly
, _("\
4044 Set mode for reading from readonly sections."), _("\
4045 Show mode for reading from readonly sections."), _("\
4046 When this mode is on, memory reads from readonly sections (such as .text)\n\
4047 will be read from the object file instead of from the target. This will\n\
4048 result in significant performance improvement for remote targets."),
4050 show_trust_readonly
,
4051 &setlist
, &showlist
);
4053 add_com ("monitor", class_obscure
, do_monitor_command
,
4054 _("Send a command to the remote monitor (remote targets only)."));
4056 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4057 _("Print the name of each layer of the internal target stack."),
4058 &maintenanceprintlist
);
4060 add_setshow_boolean_cmd ("target-async", no_class
,
4061 &target_async_permitted_1
, _("\
4062 Set whether gdb controls the inferior in asynchronous mode."), _("\
4063 Show whether gdb controls the inferior in asynchronous mode."), _("\
4064 Tells gdb whether to control the inferior in asynchronous mode."),
4065 maint_set_target_async_command
,
4066 maint_show_target_async_command
,
4067 &maintenance_set_cmdlist
,
4068 &maintenance_show_cmdlist
);
4070 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4071 &target_non_stop_enabled_1
, _("\
4072 Set whether gdb always controls the inferior in non-stop mode."), _("\
4073 Show whether gdb always controls the inferior in non-stop mode."), _("\
4074 Tells gdb whether to control the inferior in non-stop mode."),
4075 maint_set_target_non_stop_command
,
4076 maint_show_target_non_stop_command
,
4077 &maintenance_set_cmdlist
,
4078 &maintenance_show_cmdlist
);
4080 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4081 &may_write_registers_1
, _("\
4082 Set permission to write into registers."), _("\
4083 Show permission to write into registers."), _("\
4084 When this permission is on, GDB may write into the target's registers.\n\
4085 Otherwise, any sort of write attempt will result in an error."),
4086 set_target_permissions
, NULL
,
4087 &setlist
, &showlist
);
4089 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4090 &may_write_memory_1
, _("\
4091 Set permission to write into target memory."), _("\
4092 Show permission to write into target memory."), _("\
4093 When this permission is on, GDB may write into the target's memory.\n\
4094 Otherwise, any sort of write attempt will result in an error."),
4095 set_write_memory_permission
, NULL
,
4096 &setlist
, &showlist
);
4098 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4099 &may_insert_breakpoints_1
, _("\
4100 Set permission to insert breakpoints in the target."), _("\
4101 Show permission to insert breakpoints in the target."), _("\
4102 When this permission is on, GDB may insert breakpoints in the program.\n\
4103 Otherwise, any sort of insertion attempt will result in an error."),
4104 set_target_permissions
, NULL
,
4105 &setlist
, &showlist
);
4107 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4108 &may_insert_tracepoints_1
, _("\
4109 Set permission to insert tracepoints in the target."), _("\
4110 Show permission to insert tracepoints in the target."), _("\
4111 When this permission is on, GDB may insert tracepoints in the program.\n\
4112 Otherwise, any sort of insertion attempt will result in an error."),
4113 set_target_permissions
, NULL
,
4114 &setlist
, &showlist
);
4116 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4117 &may_insert_fast_tracepoints_1
, _("\
4118 Set permission to insert fast tracepoints in the target."), _("\
4119 Show permission to insert fast tracepoints in the target."), _("\
4120 When this permission is on, GDB may insert fast tracepoints.\n\
4121 Otherwise, any sort of insertion attempt will result in an error."),
4122 set_target_permissions
, NULL
,
4123 &setlist
, &showlist
);
4125 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4127 Set permission to interrupt or signal the target."), _("\
4128 Show permission to interrupt or signal the target."), _("\
4129 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4130 Otherwise, any attempt to interrupt or stop will be ignored."),
4131 set_target_permissions
, NULL
,
4132 &setlist
, &showlist
);
4134 add_com ("flash-erase", no_class
, flash_erase_command
,
4135 _("Erase all flash memory regions."));
4137 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4138 &auto_connect_native_target
, _("\
4139 Set whether GDB may automatically connect to the native target."), _("\
4140 Show whether GDB may automatically connect to the native target."), _("\
4141 When on, and GDB is not connected to a target yet, GDB\n\
4142 attempts \"run\" and other commands with the native target."),
4143 NULL
, show_auto_connect_native_target
,
4144 &setlist
, &showlist
);