1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2020 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
43 #include "gdbsupport/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "gdbsupport/byte-vector.h"
51 #include <unordered_map>
52 #include "target-connection.h"
54 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
56 static void default_terminal_info (struct target_ops
*, const char *, int);
58 static int default_watchpoint_addr_within_range (struct target_ops
*,
59 CORE_ADDR
, CORE_ADDR
, int);
61 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
64 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
66 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
69 static void default_mourn_inferior (struct target_ops
*self
);
71 static int default_search_memory (struct target_ops
*ops
,
73 ULONGEST search_space_len
,
74 const gdb_byte
*pattern
,
76 CORE_ADDR
*found_addrp
);
78 static int default_verify_memory (struct target_ops
*self
,
80 CORE_ADDR memaddr
, ULONGEST size
);
82 static void tcomplain (void) ATTRIBUTE_NORETURN
;
84 static struct target_ops
*find_default_run_target (const char *);
86 static int dummy_find_memory_regions (struct target_ops
*self
,
87 find_memory_region_ftype ignore1
,
90 static char *dummy_make_corefile_notes (struct target_ops
*self
,
91 bfd
*ignore1
, int *ignore2
);
93 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
95 static enum exec_direction_kind default_execution_direction
96 (struct target_ops
*self
);
98 /* Mapping between target_info objects (which have address identity)
99 and corresponding open/factory function/callback. Each add_target
100 call adds one entry to this map, and registers a "target
101 TARGET_NAME" command that when invoked calls the factory registered
102 here. The target_info object is associated with the command via
103 the command's context. */
104 static std::unordered_map
<const target_info
*, target_open_ftype
*>
107 /* The singleton debug target. */
109 static struct target_ops
*the_debug_target
;
111 /* Top of target stack. */
112 /* The target structure we are currently using to talk to a process
113 or file or whatever "inferior" we have. */
116 current_top_target ()
118 return current_inferior ()->top_target ();
121 /* Command list for target. */
123 static struct cmd_list_element
*targetlist
= NULL
;
125 /* True if we should trust readonly sections from the
126 executable when reading memory. */
128 static bool trust_readonly
= false;
130 /* Nonzero if we should show true memory content including
131 memory breakpoint inserted by gdb. */
133 static int show_memory_breakpoints
= 0;
135 /* These globals control whether GDB attempts to perform these
136 operations; they are useful for targets that need to prevent
137 inadvertent disruption, such as in non-stop mode. */
139 bool may_write_registers
= true;
141 bool may_write_memory
= true;
143 bool may_insert_breakpoints
= true;
145 bool may_insert_tracepoints
= true;
147 bool may_insert_fast_tracepoints
= true;
149 bool may_stop
= true;
151 /* Non-zero if we want to see trace of target level stuff. */
153 static unsigned int targetdebug
= 0;
156 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
159 push_target (the_debug_target
);
161 unpush_target (the_debug_target
);
165 show_targetdebug (struct ui_file
*file
, int from_tty
,
166 struct cmd_list_element
*c
, const char *value
)
168 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
172 target_has_all_memory_1 (void)
174 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
175 if (t
->has_all_memory ())
182 target_has_memory_1 (void)
184 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
185 if (t
->has_memory ())
192 target_has_stack_1 (void)
194 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
202 target_has_registers_1 (void)
204 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
205 if (t
->has_registers ())
212 target_has_execution_1 (inferior
*inf
)
214 for (target_ops
*t
= inf
->top_target ();
216 t
= inf
->find_target_beneath (t
))
217 if (t
->has_execution (inf
))
224 target_has_execution_current (void)
226 return target_has_execution_1 (current_inferior ());
229 /* This is used to implement the various target commands. */
232 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
234 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
235 target_open_ftype
*func
= target_factories
[ti
];
238 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
241 func (args
, from_tty
);
244 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
245 ti
->shortname
, args
, from_tty
);
251 add_target (const target_info
&t
, target_open_ftype
*func
,
252 completer_ftype
*completer
)
254 struct cmd_list_element
*c
;
256 auto &func_slot
= target_factories
[&t
];
257 if (func_slot
!= nullptr)
258 internal_error (__FILE__
, __LINE__
,
259 _("target already added (\"%s\")."), t
.shortname
);
262 if (targetlist
== NULL
)
263 add_basic_prefix_cmd ("target", class_run
, _("\
264 Connect to a target machine or process.\n\
265 The first argument is the type or protocol of the target machine.\n\
266 Remaining arguments are interpreted by the target protocol. For more\n\
267 information on the arguments for a particular protocol, type\n\
268 `help target ' followed by the protocol name."),
269 &targetlist
, "target ", 0, &cmdlist
);
270 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
271 set_cmd_context (c
, (void *) &t
);
272 set_cmd_sfunc (c
, open_target
);
273 if (completer
!= NULL
)
274 set_cmd_completer (c
, completer
);
280 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
282 struct cmd_list_element
*c
;
285 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
287 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
288 set_cmd_sfunc (c
, open_target
);
289 set_cmd_context (c
, (void *) &tinfo
);
290 alt
= xstrprintf ("target %s", tinfo
.shortname
);
291 deprecate_cmd (c
, alt
);
299 current_top_target ()->kill ();
303 target_load (const char *arg
, int from_tty
)
305 target_dcache_invalidate ();
306 current_top_target ()->load (arg
, from_tty
);
311 target_terminal_state
target_terminal::m_terminal_state
312 = target_terminal_state::is_ours
;
314 /* See target/target.h. */
317 target_terminal::init (void)
319 current_top_target ()->terminal_init ();
321 m_terminal_state
= target_terminal_state::is_ours
;
324 /* See target/target.h. */
327 target_terminal::inferior (void)
329 struct ui
*ui
= current_ui
;
331 /* A background resume (``run&'') should leave GDB in control of the
333 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
336 /* Since we always run the inferior in the main console (unless "set
337 inferior-tty" is in effect), when some UI other than the main one
338 calls target_terminal::inferior, then we leave the main UI's
339 terminal settings as is. */
343 /* If GDB is resuming the inferior in the foreground, install
344 inferior's terminal modes. */
346 struct inferior
*inf
= current_inferior ();
348 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
350 current_top_target ()->terminal_inferior ();
351 inf
->terminal_state
= target_terminal_state::is_inferior
;
354 m_terminal_state
= target_terminal_state::is_inferior
;
356 /* If the user hit C-c before, pretend that it was hit right
358 if (check_quit_flag ())
359 target_pass_ctrlc ();
362 /* See target/target.h. */
365 target_terminal::restore_inferior (void)
367 struct ui
*ui
= current_ui
;
369 /* See target_terminal::inferior(). */
370 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
373 /* Restore the terminal settings of inferiors that were in the
374 foreground but are now ours_for_output due to a temporary
375 target_target::ours_for_output() call. */
378 scoped_restore_current_inferior restore_inferior
;
380 for (::inferior
*inf
: all_inferiors ())
382 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
384 set_current_inferior (inf
);
385 current_top_target ()->terminal_inferior ();
386 inf
->terminal_state
= target_terminal_state::is_inferior
;
391 m_terminal_state
= target_terminal_state::is_inferior
;
393 /* If the user hit C-c before, pretend that it was hit right
395 if (check_quit_flag ())
396 target_pass_ctrlc ();
399 /* Switch terminal state to DESIRED_STATE, either is_ours, or
400 is_ours_for_output. */
403 target_terminal_is_ours_kind (target_terminal_state desired_state
)
405 scoped_restore_current_inferior restore_inferior
;
407 /* Must do this in two passes. First, have all inferiors save the
408 current terminal settings. Then, after all inferiors have add a
409 chance to safely save the terminal settings, restore GDB's
410 terminal settings. */
412 for (inferior
*inf
: all_inferiors ())
414 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
416 set_current_inferior (inf
);
417 current_top_target ()->terminal_save_inferior ();
421 for (inferior
*inf
: all_inferiors ())
423 /* Note we don't check is_inferior here like above because we
424 need to handle 'is_ours_for_output -> is_ours' too. Careful
425 to never transition from 'is_ours' to 'is_ours_for_output',
427 if (inf
->terminal_state
!= target_terminal_state::is_ours
428 && inf
->terminal_state
!= desired_state
)
430 set_current_inferior (inf
);
431 if (desired_state
== target_terminal_state::is_ours
)
432 current_top_target ()->terminal_ours ();
433 else if (desired_state
== target_terminal_state::is_ours_for_output
)
434 current_top_target ()->terminal_ours_for_output ();
436 gdb_assert_not_reached ("unhandled desired state");
437 inf
->terminal_state
= desired_state
;
442 /* See target/target.h. */
445 target_terminal::ours ()
447 struct ui
*ui
= current_ui
;
449 /* See target_terminal::inferior. */
453 if (m_terminal_state
== target_terminal_state::is_ours
)
456 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
457 m_terminal_state
= target_terminal_state::is_ours
;
460 /* See target/target.h. */
463 target_terminal::ours_for_output ()
465 struct ui
*ui
= current_ui
;
467 /* See target_terminal::inferior. */
471 if (!target_terminal::is_inferior ())
474 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
475 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
478 /* See target/target.h. */
481 target_terminal::info (const char *arg
, int from_tty
)
483 current_top_target ()->terminal_info (arg
, from_tty
);
489 target_supports_terminal_ours (void)
491 /* The current top target is the target at the top of the target
492 stack of the current inferior. While normally there's always an
493 inferior, we must check for nullptr here because we can get here
494 very early during startup, before the initial inferior is first
496 inferior
*inf
= current_inferior ();
500 return inf
->top_target ()->supports_terminal_ours ();
506 error (_("You can't do that when your target is `%s'"),
507 current_top_target ()->shortname ());
513 error (_("You can't do that without a process to debug."));
517 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
519 printf_unfiltered (_("No saved terminal information.\n"));
522 /* A default implementation for the to_get_ada_task_ptid target method.
524 This function builds the PTID by using both LWP and TID as part of
525 the PTID lwp and tid elements. The pid used is the pid of the
529 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
531 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
534 static enum exec_direction_kind
535 default_execution_direction (struct target_ops
*self
)
537 if (!target_can_execute_reverse
)
539 else if (!target_can_async_p ())
542 gdb_assert_not_reached ("\
543 to_execution_direction must be implemented for reverse async");
549 decref_target (target_ops
*t
)
552 if (t
->refcount () == 0)
554 if (t
->stratum () == process_stratum
)
555 connection_list_remove (as_process_stratum_target (t
));
563 target_stack::push (target_ops
*t
)
567 strata stratum
= t
->stratum ();
569 if (stratum
== process_stratum
)
570 connection_list_add (as_process_stratum_target (t
));
572 /* If there's already a target at this stratum, remove it. */
574 if (m_stack
[stratum
] != NULL
)
575 unpush (m_stack
[stratum
]);
577 /* Now add the new one. */
578 m_stack
[stratum
] = t
;
587 push_target (struct target_ops
*t
)
589 current_inferior ()->push_target (t
);
595 push_target (target_ops_up
&&t
)
597 current_inferior ()->push_target (t
.get ());
604 unpush_target (struct target_ops
*t
)
606 return current_inferior ()->unpush_target (t
);
612 target_stack::unpush (target_ops
*t
)
614 gdb_assert (t
!= NULL
);
616 strata stratum
= t
->stratum ();
618 if (stratum
== dummy_stratum
)
619 internal_error (__FILE__
, __LINE__
,
620 _("Attempt to unpush the dummy target"));
622 /* Look for the specified target. Note that a target can only occur
623 once in the target stack. */
625 if (m_stack
[stratum
] != t
)
627 /* If T wasn't pushed, quit. Only open targets should be
632 /* Unchain the target. */
633 m_stack
[stratum
] = NULL
;
635 if (m_top
== stratum
)
636 m_top
= t
->beneath ()->stratum ();
638 /* Finally close the target, if there are no inferiors
639 referencing this target still. Note we do this after unchaining,
640 so any target method calls from within the target_close
641 implementation don't end up in T anymore. Do leave the target
642 open if we have are other inferiors referencing this target
649 /* Unpush TARGET and assert that it worked. */
652 unpush_target_and_assert (struct target_ops
*target
)
654 if (!unpush_target (target
))
656 fprintf_unfiltered (gdb_stderr
,
657 "pop_all_targets couldn't find target %s\n",
658 target
->shortname ());
659 internal_error (__FILE__
, __LINE__
,
660 _("failed internal consistency check"));
665 pop_all_targets_above (enum strata above_stratum
)
667 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
668 unpush_target_and_assert (current_top_target ());
674 pop_all_targets_at_and_above (enum strata stratum
)
676 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
677 unpush_target_and_assert (current_top_target ());
681 pop_all_targets (void)
683 pop_all_targets_above (dummy_stratum
);
686 /* Return true if T is now pushed in the current inferior's target
687 stack. Return false otherwise. */
690 target_is_pushed (target_ops
*t
)
692 return current_inferior ()->target_is_pushed (t
);
695 /* Default implementation of to_get_thread_local_address. */
698 generic_tls_error (void)
700 throw_error (TLS_GENERIC_ERROR
,
701 _("Cannot find thread-local variables on this target"));
704 /* Using the objfile specified in OBJFILE, find the address for the
705 current thread's thread-local storage with offset OFFSET. */
707 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
709 volatile CORE_ADDR addr
= 0;
710 struct target_ops
*target
= current_top_target ();
711 struct gdbarch
*gdbarch
= target_gdbarch ();
713 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
715 ptid_t ptid
= inferior_ptid
;
721 /* Fetch the load module address for this objfile. */
722 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
725 if (gdbarch_get_thread_local_address_p (gdbarch
))
726 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
729 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
731 /* If an error occurred, print TLS related messages here. Otherwise,
732 throw the error to some higher catcher. */
733 catch (const gdb_exception
&ex
)
735 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
739 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
740 error (_("Cannot find thread-local variables "
741 "in this thread library."));
743 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
744 if (objfile_is_library
)
745 error (_("Cannot find shared library `%s' in dynamic"
746 " linker's load module list"), objfile_name (objfile
));
748 error (_("Cannot find executable file `%s' in dynamic"
749 " linker's load module list"), objfile_name (objfile
));
751 case TLS_NOT_ALLOCATED_YET_ERROR
:
752 if (objfile_is_library
)
753 error (_("The inferior has not yet allocated storage for"
754 " thread-local variables in\n"
755 "the shared library `%s'\n"
757 objfile_name (objfile
),
758 target_pid_to_str (ptid
).c_str ());
760 error (_("The inferior has not yet allocated storage for"
761 " thread-local variables in\n"
762 "the executable `%s'\n"
764 objfile_name (objfile
),
765 target_pid_to_str (ptid
).c_str ());
767 case TLS_GENERIC_ERROR
:
768 if (objfile_is_library
)
769 error (_("Cannot find thread-local storage for %s, "
770 "shared library %s:\n%s"),
771 target_pid_to_str (ptid
).c_str (),
772 objfile_name (objfile
), ex
.what ());
774 error (_("Cannot find thread-local storage for %s, "
775 "executable file %s:\n%s"),
776 target_pid_to_str (ptid
).c_str (),
777 objfile_name (objfile
), ex
.what ());
786 error (_("Cannot find thread-local variables on this target"));
792 target_xfer_status_to_string (enum target_xfer_status status
)
794 #define CASE(X) case X: return #X
797 CASE(TARGET_XFER_E_IO
);
798 CASE(TARGET_XFER_UNAVAILABLE
);
807 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
809 /* target_read_string -- read a null terminated string, up to LEN bytes,
810 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
811 Set *STRING to a pointer to malloc'd memory containing the data; the caller
812 is responsible for freeing it. Return the number of bytes successfully
816 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
817 int len
, int *errnop
)
823 int buffer_allocated
;
825 unsigned int nbytes_read
= 0;
829 /* Small for testing. */
830 buffer_allocated
= 4;
831 buffer
= (char *) xmalloc (buffer_allocated
);
836 tlen
= MIN (len
, 4 - (memaddr
& 3));
837 offset
= memaddr
& 3;
839 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
842 /* The transfer request might have crossed the boundary to an
843 unallocated region of memory. Retry the transfer, requesting
847 errcode
= target_read_memory (memaddr
, buf
, 1);
852 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
856 bytes
= bufptr
- buffer
;
857 buffer_allocated
*= 2;
858 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
859 bufptr
= buffer
+ bytes
;
862 for (i
= 0; i
< tlen
; i
++)
864 *bufptr
++ = buf
[i
+ offset
];
865 if (buf
[i
+ offset
] == '\000')
867 nbytes_read
+= i
+ 1;
877 string
->reset (buffer
);
883 struct target_section_table
*
884 target_get_section_table (struct target_ops
*target
)
886 return target
->get_section_table ();
889 /* Find a section containing ADDR. */
891 struct target_section
*
892 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
894 struct target_section_table
*table
= target_get_section_table (target
);
895 struct target_section
*secp
;
900 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
902 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
909 /* Helper for the memory xfer routines. Checks the attributes of the
910 memory region of MEMADDR against the read or write being attempted.
911 If the access is permitted returns true, otherwise returns false.
912 REGION_P is an optional output parameter. If not-NULL, it is
913 filled with a pointer to the memory region of MEMADDR. REG_LEN
914 returns LEN trimmed to the end of the region. This is how much the
915 caller can continue requesting, if the access is permitted. A
916 single xfer request must not straddle memory region boundaries. */
919 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
920 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
921 struct mem_region
**region_p
)
923 struct mem_region
*region
;
925 region
= lookup_mem_region (memaddr
);
927 if (region_p
!= NULL
)
930 switch (region
->attrib
.mode
)
933 if (writebuf
!= NULL
)
943 /* We only support writing to flash during "load" for now. */
944 if (writebuf
!= NULL
)
945 error (_("Writing to flash memory forbidden in this context"));
952 /* region->hi == 0 means there's no upper bound. */
953 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
956 *reg_len
= region
->hi
- memaddr
;
961 /* Read memory from more than one valid target. A core file, for
962 instance, could have some of memory but delegate other bits to
963 the target below it. So, we must manually try all targets. */
965 enum target_xfer_status
966 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
967 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
968 ULONGEST
*xfered_len
)
970 enum target_xfer_status res
;
974 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
975 readbuf
, writebuf
, memaddr
, len
,
977 if (res
== TARGET_XFER_OK
)
980 /* Stop if the target reports that the memory is not available. */
981 if (res
== TARGET_XFER_UNAVAILABLE
)
984 /* We want to continue past core files to executables, but not
985 past a running target's memory. */
986 if (ops
->has_all_memory ())
989 ops
= ops
->beneath ();
993 /* The cache works at the raw memory level. Make sure the cache
994 gets updated with raw contents no matter what kind of memory
995 object was originally being written. Note we do write-through
996 first, so that if it fails, we don't write to the cache contents
997 that never made it to the target. */
999 && inferior_ptid
!= null_ptid
1000 && target_dcache_init_p ()
1001 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1003 DCACHE
*dcache
= target_dcache_get ();
1005 /* Note that writing to an area of memory which wasn't present
1006 in the cache doesn't cause it to be loaded in. */
1007 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1013 /* Perform a partial memory transfer.
1014 For docs see target.h, to_xfer_partial. */
1016 static enum target_xfer_status
1017 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1018 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1019 ULONGEST len
, ULONGEST
*xfered_len
)
1021 enum target_xfer_status res
;
1023 struct mem_region
*region
;
1024 struct inferior
*inf
;
1026 /* For accesses to unmapped overlay sections, read directly from
1027 files. Must do this first, as MEMADDR may need adjustment. */
1028 if (readbuf
!= NULL
&& overlay_debugging
)
1030 struct obj_section
*section
= find_pc_overlay (memaddr
);
1032 if (pc_in_unmapped_range (memaddr
, section
))
1034 struct target_section_table
*table
1035 = target_get_section_table (ops
);
1036 const char *section_name
= section
->the_bfd_section
->name
;
1038 memaddr
= overlay_mapped_address (memaddr
, section
);
1039 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1040 memaddr
, len
, xfered_len
,
1042 table
->sections_end
,
1047 /* Try the executable files, if "trust-readonly-sections" is set. */
1048 if (readbuf
!= NULL
&& trust_readonly
)
1050 struct target_section
*secp
;
1051 struct target_section_table
*table
;
1053 secp
= target_section_by_addr (ops
, memaddr
);
1055 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1057 table
= target_get_section_table (ops
);
1058 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1059 memaddr
, len
, xfered_len
,
1061 table
->sections_end
,
1066 /* Try GDB's internal data cache. */
1068 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1070 return TARGET_XFER_E_IO
;
1072 if (inferior_ptid
!= null_ptid
)
1073 inf
= current_inferior ();
1079 /* The dcache reads whole cache lines; that doesn't play well
1080 with reading from a trace buffer, because reading outside of
1081 the collected memory range fails. */
1082 && get_traceframe_number () == -1
1083 && (region
->attrib
.cache
1084 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1085 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1087 DCACHE
*dcache
= target_dcache_get_or_init ();
1089 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1090 reg_len
, xfered_len
);
1093 /* If none of those methods found the memory we wanted, fall back
1094 to a target partial transfer. Normally a single call to
1095 to_xfer_partial is enough; if it doesn't recognize an object
1096 it will call the to_xfer_partial of the next target down.
1097 But for memory this won't do. Memory is the only target
1098 object which can be read from more than one valid target.
1099 A core file, for instance, could have some of memory but
1100 delegate other bits to the target below it. So, we must
1101 manually try all targets. */
1103 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1106 /* If we still haven't got anything, return the last error. We
1111 /* Perform a partial memory transfer. For docs see target.h,
1114 static enum target_xfer_status
1115 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1116 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1117 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1119 enum target_xfer_status res
;
1121 /* Zero length requests are ok and require no work. */
1123 return TARGET_XFER_EOF
;
1125 memaddr
= address_significant (target_gdbarch (), memaddr
);
1127 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1128 breakpoint insns, thus hiding out from higher layers whether
1129 there are software breakpoints inserted in the code stream. */
1130 if (readbuf
!= NULL
)
1132 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1135 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1136 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1140 /* A large write request is likely to be partially satisfied
1141 by memory_xfer_partial_1. We will continually malloc
1142 and free a copy of the entire write request for breakpoint
1143 shadow handling even though we only end up writing a small
1144 subset of it. Cap writes to a limit specified by the target
1145 to mitigate this. */
1146 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1148 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1149 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1150 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1157 scoped_restore_tmpl
<int>
1158 make_scoped_restore_show_memory_breakpoints (int show
)
1160 return make_scoped_restore (&show_memory_breakpoints
, show
);
1163 /* For docs see target.h, to_xfer_partial. */
1165 enum target_xfer_status
1166 target_xfer_partial (struct target_ops
*ops
,
1167 enum target_object object
, const char *annex
,
1168 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1169 ULONGEST offset
, ULONGEST len
,
1170 ULONGEST
*xfered_len
)
1172 enum target_xfer_status retval
;
1174 /* Transfer is done when LEN is zero. */
1176 return TARGET_XFER_EOF
;
1178 if (writebuf
&& !may_write_memory
)
1179 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1180 core_addr_to_string_nz (offset
), plongest (len
));
1184 /* If this is a memory transfer, let the memory-specific code
1185 have a look at it instead. Memory transfers are more
1187 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1188 || object
== TARGET_OBJECT_CODE_MEMORY
)
1189 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1190 writebuf
, offset
, len
, xfered_len
);
1191 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1193 /* Skip/avoid accessing the target if the memory region
1194 attributes block the access. Check this here instead of in
1195 raw_memory_xfer_partial as otherwise we'd end up checking
1196 this twice in the case of the memory_xfer_partial path is
1197 taken; once before checking the dcache, and another in the
1198 tail call to raw_memory_xfer_partial. */
1199 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1201 return TARGET_XFER_E_IO
;
1203 /* Request the normal memory object from other layers. */
1204 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1208 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1209 writebuf
, offset
, len
, xfered_len
);
1213 const unsigned char *myaddr
= NULL
;
1215 fprintf_unfiltered (gdb_stdlog
,
1216 "%s:target_xfer_partial "
1217 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1220 (annex
? annex
: "(null)"),
1221 host_address_to_string (readbuf
),
1222 host_address_to_string (writebuf
),
1223 core_addr_to_string_nz (offset
),
1224 pulongest (len
), retval
,
1225 pulongest (*xfered_len
));
1231 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1235 fputs_unfiltered (", bytes =", gdb_stdlog
);
1236 for (i
= 0; i
< *xfered_len
; i
++)
1238 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1240 if (targetdebug
< 2 && i
> 0)
1242 fprintf_unfiltered (gdb_stdlog
, " ...");
1245 fprintf_unfiltered (gdb_stdlog
, "\n");
1248 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1252 fputc_unfiltered ('\n', gdb_stdlog
);
1255 /* Check implementations of to_xfer_partial update *XFERED_LEN
1256 properly. Do assertion after printing debug messages, so that we
1257 can find more clues on assertion failure from debugging messages. */
1258 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1259 gdb_assert (*xfered_len
> 0);
1264 /* Read LEN bytes of target memory at address MEMADDR, placing the
1265 results in GDB's memory at MYADDR. Returns either 0 for success or
1266 -1 if any error occurs.
1268 If an error occurs, no guarantee is made about the contents of the data at
1269 MYADDR. In particular, the caller should not depend upon partial reads
1270 filling the buffer with good data. There is no way for the caller to know
1271 how much good data might have been transfered anyway. Callers that can
1272 deal with partial reads should call target_read (which will retry until
1273 it makes no progress, and then return how much was transferred). */
1276 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1278 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1279 myaddr
, memaddr
, len
) == len
)
1285 /* See target/target.h. */
1288 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1293 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1296 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1297 gdbarch_byte_order (target_gdbarch ()));
1301 /* Like target_read_memory, but specify explicitly that this is a read
1302 from the target's raw memory. That is, this read bypasses the
1303 dcache, breakpoint shadowing, etc. */
1306 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1308 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1309 myaddr
, memaddr
, len
) == len
)
1315 /* Like target_read_memory, but specify explicitly that this is a read from
1316 the target's stack. This may trigger different cache behavior. */
1319 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1321 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1322 myaddr
, memaddr
, len
) == len
)
1328 /* Like target_read_memory, but specify explicitly that this is a read from
1329 the target's code. This may trigger different cache behavior. */
1332 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1334 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1335 myaddr
, memaddr
, len
) == len
)
1341 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1342 Returns either 0 for success or -1 if any error occurs. If an
1343 error occurs, no guarantee is made about how much data got written.
1344 Callers that can deal with partial writes should call
1348 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1350 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1351 myaddr
, memaddr
, len
) == len
)
1357 /* Write LEN bytes from MYADDR to target raw memory at address
1358 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1359 If an error occurs, no guarantee is made about how much data got
1360 written. Callers that can deal with partial writes should call
1364 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1366 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1367 myaddr
, memaddr
, len
) == len
)
1373 /* Fetch the target's memory map. */
1375 std::vector
<mem_region
>
1376 target_memory_map (void)
1378 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1379 if (result
.empty ())
1382 std::sort (result
.begin (), result
.end ());
1384 /* Check that regions do not overlap. Simultaneously assign
1385 a numbering for the "mem" commands to use to refer to
1387 mem_region
*last_one
= NULL
;
1388 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1390 mem_region
*this_one
= &result
[ix
];
1391 this_one
->number
= ix
;
1393 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1395 warning (_("Overlapping regions in memory map: ignoring"));
1396 return std::vector
<mem_region
> ();
1399 last_one
= this_one
;
1406 target_flash_erase (ULONGEST address
, LONGEST length
)
1408 current_top_target ()->flash_erase (address
, length
);
1412 target_flash_done (void)
1414 current_top_target ()->flash_done ();
1418 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1419 struct cmd_list_element
*c
, const char *value
)
1421 fprintf_filtered (file
,
1422 _("Mode for reading from readonly sections is %s.\n"),
1426 /* Target vector read/write partial wrapper functions. */
1428 static enum target_xfer_status
1429 target_read_partial (struct target_ops
*ops
,
1430 enum target_object object
,
1431 const char *annex
, gdb_byte
*buf
,
1432 ULONGEST offset
, ULONGEST len
,
1433 ULONGEST
*xfered_len
)
1435 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1439 static enum target_xfer_status
1440 target_write_partial (struct target_ops
*ops
,
1441 enum target_object object
,
1442 const char *annex
, const gdb_byte
*buf
,
1443 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1445 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1449 /* Wrappers to perform the full transfer. */
1451 /* For docs on target_read see target.h. */
1454 target_read (struct target_ops
*ops
,
1455 enum target_object object
,
1456 const char *annex
, gdb_byte
*buf
,
1457 ULONGEST offset
, LONGEST len
)
1459 LONGEST xfered_total
= 0;
1462 /* If we are reading from a memory object, find the length of an addressable
1463 unit for that architecture. */
1464 if (object
== TARGET_OBJECT_MEMORY
1465 || object
== TARGET_OBJECT_STACK_MEMORY
1466 || object
== TARGET_OBJECT_CODE_MEMORY
1467 || object
== TARGET_OBJECT_RAW_MEMORY
)
1468 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1470 while (xfered_total
< len
)
1472 ULONGEST xfered_partial
;
1473 enum target_xfer_status status
;
1475 status
= target_read_partial (ops
, object
, annex
,
1476 buf
+ xfered_total
* unit_size
,
1477 offset
+ xfered_total
, len
- xfered_total
,
1480 /* Call an observer, notifying them of the xfer progress? */
1481 if (status
== TARGET_XFER_EOF
)
1482 return xfered_total
;
1483 else if (status
== TARGET_XFER_OK
)
1485 xfered_total
+= xfered_partial
;
1489 return TARGET_XFER_E_IO
;
1495 /* Assuming that the entire [begin, end) range of memory cannot be
1496 read, try to read whatever subrange is possible to read.
1498 The function returns, in RESULT, either zero or one memory block.
1499 If there's a readable subrange at the beginning, it is completely
1500 read and returned. Any further readable subrange will not be read.
1501 Otherwise, if there's a readable subrange at the end, it will be
1502 completely read and returned. Any readable subranges before it
1503 (obviously, not starting at the beginning), will be ignored. In
1504 other cases -- either no readable subrange, or readable subrange(s)
1505 that is neither at the beginning, or end, nothing is returned.
1507 The purpose of this function is to handle a read across a boundary
1508 of accessible memory in a case when memory map is not available.
1509 The above restrictions are fine for this case, but will give
1510 incorrect results if the memory is 'patchy'. However, supporting
1511 'patchy' memory would require trying to read every single byte,
1512 and it seems unacceptable solution. Explicit memory map is
1513 recommended for this case -- and target_read_memory_robust will
1514 take care of reading multiple ranges then. */
1517 read_whatever_is_readable (struct target_ops
*ops
,
1518 const ULONGEST begin
, const ULONGEST end
,
1520 std::vector
<memory_read_result
> *result
)
1522 ULONGEST current_begin
= begin
;
1523 ULONGEST current_end
= end
;
1525 ULONGEST xfered_len
;
1527 /* If we previously failed to read 1 byte, nothing can be done here. */
1528 if (end
- begin
<= 1)
1531 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1533 /* Check that either first or the last byte is readable, and give up
1534 if not. This heuristic is meant to permit reading accessible memory
1535 at the boundary of accessible region. */
1536 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1537 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1542 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1543 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1544 &xfered_len
) == TARGET_XFER_OK
)
1552 /* Loop invariant is that the [current_begin, current_end) was previously
1553 found to be not readable as a whole.
1555 Note loop condition -- if the range has 1 byte, we can't divide the range
1556 so there's no point trying further. */
1557 while (current_end
- current_begin
> 1)
1559 ULONGEST first_half_begin
, first_half_end
;
1560 ULONGEST second_half_begin
, second_half_end
;
1562 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1566 first_half_begin
= current_begin
;
1567 first_half_end
= middle
;
1568 second_half_begin
= middle
;
1569 second_half_end
= current_end
;
1573 first_half_begin
= middle
;
1574 first_half_end
= current_end
;
1575 second_half_begin
= current_begin
;
1576 second_half_end
= middle
;
1579 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1580 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1582 first_half_end
- first_half_begin
);
1584 if (xfer
== first_half_end
- first_half_begin
)
1586 /* This half reads up fine. So, the error must be in the
1588 current_begin
= second_half_begin
;
1589 current_end
= second_half_end
;
1593 /* This half is not readable. Because we've tried one byte, we
1594 know some part of this half if actually readable. Go to the next
1595 iteration to divide again and try to read.
1597 We don't handle the other half, because this function only tries
1598 to read a single readable subrange. */
1599 current_begin
= first_half_begin
;
1600 current_end
= first_half_end
;
1606 /* The [begin, current_begin) range has been read. */
1607 result
->emplace_back (begin
, current_end
, std::move (buf
));
1611 /* The [current_end, end) range has been read. */
1612 LONGEST region_len
= end
- current_end
;
1614 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1615 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1616 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1617 region_len
* unit_size
);
1618 result
->emplace_back (current_end
, end
, std::move (data
));
1622 std::vector
<memory_read_result
>
1623 read_memory_robust (struct target_ops
*ops
,
1624 const ULONGEST offset
, const LONGEST len
)
1626 std::vector
<memory_read_result
> result
;
1627 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1629 LONGEST xfered_total
= 0;
1630 while (xfered_total
< len
)
1632 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1635 /* If there is no explicit region, a fake one should be created. */
1636 gdb_assert (region
);
1638 if (region
->hi
== 0)
1639 region_len
= len
- xfered_total
;
1641 region_len
= region
->hi
- offset
;
1643 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1645 /* Cannot read this region. Note that we can end up here only
1646 if the region is explicitly marked inaccessible, or
1647 'inaccessible-by-default' is in effect. */
1648 xfered_total
+= region_len
;
1652 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1653 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1654 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1656 LONGEST xfered_partial
=
1657 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1658 offset
+ xfered_total
, to_read
);
1659 /* Call an observer, notifying them of the xfer progress? */
1660 if (xfered_partial
<= 0)
1662 /* Got an error reading full chunk. See if maybe we can read
1664 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1665 offset
+ xfered_total
+ to_read
,
1666 unit_size
, &result
);
1667 xfered_total
+= to_read
;
1671 result
.emplace_back (offset
+ xfered_total
,
1672 offset
+ xfered_total
+ xfered_partial
,
1673 std::move (buffer
));
1674 xfered_total
+= xfered_partial
;
1684 /* An alternative to target_write with progress callbacks. */
1687 target_write_with_progress (struct target_ops
*ops
,
1688 enum target_object object
,
1689 const char *annex
, const gdb_byte
*buf
,
1690 ULONGEST offset
, LONGEST len
,
1691 void (*progress
) (ULONGEST
, void *), void *baton
)
1693 LONGEST xfered_total
= 0;
1696 /* If we are writing to a memory object, find the length of an addressable
1697 unit for that architecture. */
1698 if (object
== TARGET_OBJECT_MEMORY
1699 || object
== TARGET_OBJECT_STACK_MEMORY
1700 || object
== TARGET_OBJECT_CODE_MEMORY
1701 || object
== TARGET_OBJECT_RAW_MEMORY
)
1702 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1704 /* Give the progress callback a chance to set up. */
1706 (*progress
) (0, baton
);
1708 while (xfered_total
< len
)
1710 ULONGEST xfered_partial
;
1711 enum target_xfer_status status
;
1713 status
= target_write_partial (ops
, object
, annex
,
1714 buf
+ xfered_total
* unit_size
,
1715 offset
+ xfered_total
, len
- xfered_total
,
1718 if (status
!= TARGET_XFER_OK
)
1719 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1722 (*progress
) (xfered_partial
, baton
);
1724 xfered_total
+= xfered_partial
;
1730 /* For docs on target_write see target.h. */
1733 target_write (struct target_ops
*ops
,
1734 enum target_object object
,
1735 const char *annex
, const gdb_byte
*buf
,
1736 ULONGEST offset
, LONGEST len
)
1738 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1742 /* Help for target_read_alloc and target_read_stralloc. See their comments
1745 template <typename T
>
1746 gdb::optional
<gdb::def_vector
<T
>>
1747 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1750 gdb::def_vector
<T
> buf
;
1752 const int chunk
= 4096;
1754 /* This function does not have a length parameter; it reads the
1755 entire OBJECT). Also, it doesn't support objects fetched partly
1756 from one target and partly from another (in a different stratum,
1757 e.g. a core file and an executable). Both reasons make it
1758 unsuitable for reading memory. */
1759 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1761 /* Start by reading up to 4K at a time. The target will throttle
1762 this number down if necessary. */
1765 ULONGEST xfered_len
;
1766 enum target_xfer_status status
;
1768 buf
.resize (buf_pos
+ chunk
);
1770 status
= target_read_partial (ops
, object
, annex
,
1771 (gdb_byte
*) &buf
[buf_pos
],
1775 if (status
== TARGET_XFER_EOF
)
1777 /* Read all there was. */
1778 buf
.resize (buf_pos
);
1781 else if (status
!= TARGET_XFER_OK
)
1783 /* An error occurred. */
1787 buf_pos
+= xfered_len
;
1795 gdb::optional
<gdb::byte_vector
>
1796 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1799 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1804 gdb::optional
<gdb::char_vector
>
1805 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1808 gdb::optional
<gdb::char_vector
> buf
1809 = target_read_alloc_1
<char> (ops
, object
, annex
);
1814 if (buf
->empty () || buf
->back () != '\0')
1815 buf
->push_back ('\0');
1817 /* Check for embedded NUL bytes; but allow trailing NULs. */
1818 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1819 it
!= buf
->end (); it
++)
1822 warning (_("target object %d, annex %s, "
1823 "contained unexpected null characters"),
1824 (int) object
, annex
? annex
: "(none)");
1831 /* Memory transfer methods. */
1834 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1837 /* This method is used to read from an alternate, non-current
1838 target. This read must bypass the overlay support (as symbols
1839 don't match this target), and GDB's internal cache (wrong cache
1840 for this target). */
1841 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1843 memory_error (TARGET_XFER_E_IO
, addr
);
1847 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1848 int len
, enum bfd_endian byte_order
)
1850 gdb_byte buf
[sizeof (ULONGEST
)];
1852 gdb_assert (len
<= sizeof (buf
));
1853 get_target_memory (ops
, addr
, buf
, len
);
1854 return extract_unsigned_integer (buf
, len
, byte_order
);
1860 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1861 struct bp_target_info
*bp_tgt
)
1863 if (!may_insert_breakpoints
)
1865 warning (_("May not insert breakpoints"));
1869 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1875 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1876 struct bp_target_info
*bp_tgt
,
1877 enum remove_bp_reason reason
)
1879 /* This is kind of a weird case to handle, but the permission might
1880 have been changed after breakpoints were inserted - in which case
1881 we should just take the user literally and assume that any
1882 breakpoints should be left in place. */
1883 if (!may_insert_breakpoints
)
1885 warning (_("May not remove breakpoints"));
1889 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1893 info_target_command (const char *args
, int from_tty
)
1895 int has_all_mem
= 0;
1897 if (symfile_objfile
!= NULL
)
1898 printf_unfiltered (_("Symbols from \"%s\".\n"),
1899 objfile_name (symfile_objfile
));
1901 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1903 if (!t
->has_memory ())
1906 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1909 printf_unfiltered (_("\tWhile running this, "
1910 "GDB does not access memory from...\n"));
1911 printf_unfiltered ("%s:\n", t
->longname ());
1913 has_all_mem
= t
->has_all_memory ();
1917 /* This function is called before any new inferior is created, e.g.
1918 by running a program, attaching, or connecting to a target.
1919 It cleans up any state from previous invocations which might
1920 change between runs. This is a subset of what target_preopen
1921 resets (things which might change between targets). */
1924 target_pre_inferior (int from_tty
)
1926 /* Clear out solib state. Otherwise the solib state of the previous
1927 inferior might have survived and is entirely wrong for the new
1928 target. This has been observed on GNU/Linux using glibc 2.3. How
1940 Cannot access memory at address 0xdeadbeef
1943 /* In some OSs, the shared library list is the same/global/shared
1944 across inferiors. If code is shared between processes, so are
1945 memory regions and features. */
1946 if (!gdbarch_has_global_solist (target_gdbarch ()))
1948 no_shared_libraries (NULL
, from_tty
);
1950 invalidate_target_mem_regions ();
1952 target_clear_description ();
1955 /* attach_flag may be set if the previous process associated with
1956 the inferior was attached to. */
1957 current_inferior ()->attach_flag
= 0;
1959 current_inferior ()->highest_thread_num
= 0;
1961 agent_capability_invalidate ();
1964 /* This is to be called by the open routine before it does
1968 target_preopen (int from_tty
)
1972 if (current_inferior ()->pid
!= 0)
1975 || !target_has_execution
1976 || query (_("A program is being debugged already. Kill it? ")))
1978 /* Core inferiors actually should be detached, not
1980 if (target_has_execution
)
1983 target_detach (current_inferior (), 0);
1986 error (_("Program not killed."));
1989 /* Calling target_kill may remove the target from the stack. But if
1990 it doesn't (which seems like a win for UDI), remove it now. */
1991 /* Leave the exec target, though. The user may be switching from a
1992 live process to a core of the same program. */
1993 pop_all_targets_above (file_stratum
);
1995 target_pre_inferior (from_tty
);
2001 target_detach (inferior
*inf
, int from_tty
)
2003 /* After we have detached, we will clear the register cache for this inferior
2004 by calling registers_changed_ptid. We must save the pid_ptid before
2005 detaching, as the target detach method will clear inf->pid. */
2006 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2008 /* As long as some to_detach implementations rely on the current_inferior
2009 (either directly, or indirectly, like through target_gdbarch or by
2010 reading memory), INF needs to be the current inferior. When that
2011 requirement will become no longer true, then we can remove this
2013 gdb_assert (inf
== current_inferior ());
2015 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2016 /* Don't remove global breakpoints here. They're removed on
2017 disconnection from the target. */
2020 /* If we're in breakpoints-always-inserted mode, have to remove
2021 breakpoints before detaching. */
2022 remove_breakpoints_inf (current_inferior ());
2024 prepare_for_detach ();
2026 /* Hold a strong reference because detaching may unpush the
2028 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2030 current_top_target ()->detach (inf
, from_tty
);
2032 process_stratum_target
*proc_target
2033 = as_process_stratum_target (proc_target_ref
.get ());
2035 registers_changed_ptid (proc_target
, save_pid_ptid
);
2037 /* We have to ensure we have no frame cache left. Normally,
2038 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2039 inferior_ptid matches save_pid_ptid, but in our case, it does not
2040 call it, as inferior_ptid has been reset. */
2041 reinit_frame_cache ();
2045 target_disconnect (const char *args
, int from_tty
)
2047 /* If we're in breakpoints-always-inserted mode or if breakpoints
2048 are global across processes, we have to remove them before
2050 remove_breakpoints ();
2052 current_top_target ()->disconnect (args
, from_tty
);
2055 /* See target/target.h. */
2058 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2060 return current_top_target ()->wait (ptid
, status
, options
);
2066 default_target_wait (struct target_ops
*ops
,
2067 ptid_t ptid
, struct target_waitstatus
*status
,
2070 status
->kind
= TARGET_WAITKIND_IGNORE
;
2071 return minus_one_ptid
;
2075 target_pid_to_str (ptid_t ptid
)
2077 return current_top_target ()->pid_to_str (ptid
);
2081 target_thread_name (struct thread_info
*info
)
2083 gdb_assert (info
->inf
== current_inferior ());
2085 return current_top_target ()->thread_name (info
);
2088 struct thread_info
*
2089 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2091 struct inferior
*inf
)
2093 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2100 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2102 return current_top_target ()->thread_info_to_thread_handle (tip
);
2106 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2108 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2110 target_dcache_invalidate ();
2112 current_top_target ()->resume (ptid
, step
, signal
);
2114 registers_changed_ptid (curr_target
, ptid
);
2115 /* We only set the internal executing state here. The user/frontend
2116 running state is set at a higher level. This also clears the
2117 thread's stop_pc as side effect. */
2118 set_executing (curr_target
, ptid
, true);
2119 clear_inline_frame_state (curr_target
, ptid
);
2122 /* If true, target_commit_resume is a nop. */
2123 static int defer_target_commit_resume
;
2128 target_commit_resume (void)
2130 if (defer_target_commit_resume
)
2133 current_top_target ()->commit_resume ();
2138 scoped_restore_tmpl
<int>
2139 make_scoped_defer_target_commit_resume ()
2141 return make_scoped_restore (&defer_target_commit_resume
, 1);
2145 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2147 current_top_target ()->pass_signals (pass_signals
);
2151 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2153 current_top_target ()->program_signals (program_signals
);
2157 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2160 /* Some target returned a fork event, but did not know how to follow it. */
2161 internal_error (__FILE__
, __LINE__
,
2162 _("could not find a target to follow fork"));
2165 /* Look through the list of possible targets for a target that can
2169 target_follow_fork (bool follow_child
, bool detach_fork
)
2171 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2174 /* Target wrapper for follow exec hook. */
2177 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2179 current_top_target ()->follow_exec (inf
, execd_pathname
);
2183 default_mourn_inferior (struct target_ops
*self
)
2185 internal_error (__FILE__
, __LINE__
,
2186 _("could not find a target to follow mourn inferior"));
2190 target_mourn_inferior (ptid_t ptid
)
2192 gdb_assert (ptid
== inferior_ptid
);
2193 current_top_target ()->mourn_inferior ();
2195 /* We no longer need to keep handles on any of the object files.
2196 Make sure to release them to avoid unnecessarily locking any
2197 of them while we're not actually debugging. */
2198 bfd_cache_close_all ();
2201 /* Look for a target which can describe architectural features, starting
2202 from TARGET. If we find one, return its description. */
2204 const struct target_desc
*
2205 target_read_description (struct target_ops
*target
)
2207 return target
->read_description ();
2210 /* This implements a basic search of memory, reading target memory and
2211 performing the search here (as opposed to performing the search in on the
2212 target side with, for example, gdbserver). */
2215 simple_search_memory (struct target_ops
*ops
,
2216 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2217 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2218 CORE_ADDR
*found_addrp
)
2220 /* NOTE: also defined in find.c testcase. */
2221 #define SEARCH_CHUNK_SIZE 16000
2222 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2223 /* Buffer to hold memory contents for searching. */
2224 unsigned search_buf_size
;
2226 search_buf_size
= chunk_size
+ pattern_len
- 1;
2228 /* No point in trying to allocate a buffer larger than the search space. */
2229 if (search_space_len
< search_buf_size
)
2230 search_buf_size
= search_space_len
;
2232 gdb::byte_vector
search_buf (search_buf_size
);
2234 /* Prime the search buffer. */
2236 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2237 search_buf
.data (), start_addr
, search_buf_size
)
2240 warning (_("Unable to access %s bytes of target "
2241 "memory at %s, halting search."),
2242 pulongest (search_buf_size
), hex_string (start_addr
));
2246 /* Perform the search.
2248 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2249 When we've scanned N bytes we copy the trailing bytes to the start and
2250 read in another N bytes. */
2252 while (search_space_len
>= pattern_len
)
2254 gdb_byte
*found_ptr
;
2255 unsigned nr_search_bytes
2256 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2258 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2259 pattern
, pattern_len
);
2261 if (found_ptr
!= NULL
)
2263 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2265 *found_addrp
= found_addr
;
2269 /* Not found in this chunk, skip to next chunk. */
2271 /* Don't let search_space_len wrap here, it's unsigned. */
2272 if (search_space_len
>= chunk_size
)
2273 search_space_len
-= chunk_size
;
2275 search_space_len
= 0;
2277 if (search_space_len
>= pattern_len
)
2279 unsigned keep_len
= search_buf_size
- chunk_size
;
2280 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2283 /* Copy the trailing part of the previous iteration to the front
2284 of the buffer for the next iteration. */
2285 gdb_assert (keep_len
== pattern_len
- 1);
2286 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2288 nr_to_read
= std::min (search_space_len
- keep_len
,
2289 (ULONGEST
) chunk_size
);
2291 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2292 &search_buf
[keep_len
], read_addr
,
2293 nr_to_read
) != nr_to_read
)
2295 warning (_("Unable to access %s bytes of target "
2296 "memory at %s, halting search."),
2297 plongest (nr_to_read
),
2298 hex_string (read_addr
));
2302 start_addr
+= chunk_size
;
2311 /* Default implementation of memory-searching. */
2314 default_search_memory (struct target_ops
*self
,
2315 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2316 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2317 CORE_ADDR
*found_addrp
)
2319 /* Start over from the top of the target stack. */
2320 return simple_search_memory (current_top_target (),
2321 start_addr
, search_space_len
,
2322 pattern
, pattern_len
, found_addrp
);
2325 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2326 sequence of bytes in PATTERN with length PATTERN_LEN.
2328 The result is 1 if found, 0 if not found, and -1 if there was an error
2329 requiring halting of the search (e.g. memory read error).
2330 If the pattern is found the address is recorded in FOUND_ADDRP. */
2333 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2334 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2335 CORE_ADDR
*found_addrp
)
2337 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2338 pattern
, pattern_len
, found_addrp
);
2341 /* Look through the currently pushed targets. If none of them will
2342 be able to restart the currently running process, issue an error
2346 target_require_runnable (void)
2348 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2350 /* If this target knows how to create a new program, then
2351 assume we will still be able to after killing the current
2352 one. Either killing and mourning will not pop T, or else
2353 find_default_run_target will find it again. */
2354 if (t
->can_create_inferior ())
2357 /* Do not worry about targets at certain strata that can not
2358 create inferiors. Assume they will be pushed again if
2359 necessary, and continue to the process_stratum. */
2360 if (t
->stratum () > process_stratum
)
2363 error (_("The \"%s\" target does not support \"run\". "
2364 "Try \"help target\" or \"continue\"."),
2368 /* This function is only called if the target is running. In that
2369 case there should have been a process_stratum target and it
2370 should either know how to create inferiors, or not... */
2371 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2374 /* Whether GDB is allowed to fall back to the default run target for
2375 "run", "attach", etc. when no target is connected yet. */
2376 static bool auto_connect_native_target
= true;
2379 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2380 struct cmd_list_element
*c
, const char *value
)
2382 fprintf_filtered (file
,
2383 _("Whether GDB may automatically connect to the "
2384 "native target is %s.\n"),
2388 /* A pointer to the target that can respond to "run" or "attach".
2389 Native targets are always singletons and instantiated early at GDB
2391 static target_ops
*the_native_target
;
2396 set_native_target (target_ops
*target
)
2398 if (the_native_target
!= NULL
)
2399 internal_error (__FILE__
, __LINE__
,
2400 _("native target already set (\"%s\")."),
2401 the_native_target
->longname ());
2403 the_native_target
= target
;
2409 get_native_target ()
2411 return the_native_target
;
2414 /* Look through the list of possible targets for a target that can
2415 execute a run or attach command without any other data. This is
2416 used to locate the default process stratum.
2418 If DO_MESG is not NULL, the result is always valid (error() is
2419 called for errors); else, return NULL on error. */
2421 static struct target_ops
*
2422 find_default_run_target (const char *do_mesg
)
2424 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2425 return the_native_target
;
2427 if (do_mesg
!= NULL
)
2428 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2435 find_attach_target (void)
2437 /* If a target on the current stack can attach, use it. */
2438 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2440 if (t
->can_attach ())
2444 /* Otherwise, use the default run target for attaching. */
2445 return find_default_run_target ("attach");
2451 find_run_target (void)
2453 /* If a target on the current stack can run, use it. */
2454 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2456 if (t
->can_create_inferior ())
2460 /* Otherwise, use the default run target. */
2461 return find_default_run_target ("run");
2465 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2470 /* Implement the "info proc" command. */
2473 target_info_proc (const char *args
, enum info_proc_what what
)
2475 struct target_ops
*t
;
2477 /* If we're already connected to something that can get us OS
2478 related data, use it. Otherwise, try using the native
2480 t
= find_target_at (process_stratum
);
2482 t
= find_default_run_target (NULL
);
2484 for (; t
!= NULL
; t
= t
->beneath ())
2486 if (t
->info_proc (args
, what
))
2489 fprintf_unfiltered (gdb_stdlog
,
2490 "target_info_proc (\"%s\", %d)\n", args
, what
);
2500 find_default_supports_disable_randomization (struct target_ops
*self
)
2502 struct target_ops
*t
;
2504 t
= find_default_run_target (NULL
);
2506 return t
->supports_disable_randomization ();
2511 target_supports_disable_randomization (void)
2513 return current_top_target ()->supports_disable_randomization ();
2516 /* See target/target.h. */
2519 target_supports_multi_process (void)
2521 return current_top_target ()->supports_multi_process ();
2526 gdb::optional
<gdb::char_vector
>
2527 target_get_osdata (const char *type
)
2529 struct target_ops
*t
;
2531 /* If we're already connected to something that can get us OS
2532 related data, use it. Otherwise, try using the native
2534 t
= find_target_at (process_stratum
);
2536 t
= find_default_run_target ("get OS data");
2541 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2544 /* Determine the current address space of thread PTID. */
2546 struct address_space
*
2547 target_thread_address_space (ptid_t ptid
)
2549 struct address_space
*aspace
;
2551 aspace
= current_top_target ()->thread_address_space (ptid
);
2552 gdb_assert (aspace
!= NULL
);
2560 target_ops::beneath () const
2562 return current_inferior ()->find_target_beneath (this);
2566 target_ops::close ()
2571 target_ops::can_attach ()
2577 target_ops::attach (const char *, int)
2579 gdb_assert_not_reached ("target_ops::attach called");
2583 target_ops::can_create_inferior ()
2589 target_ops::create_inferior (const char *, const std::string
&,
2592 gdb_assert_not_reached ("target_ops::create_inferior called");
2596 target_ops::can_run ()
2604 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2613 /* Target file operations. */
2615 static struct target_ops
*
2616 default_fileio_target (void)
2618 struct target_ops
*t
;
2620 /* If we're already connected to something that can perform
2621 file I/O, use it. Otherwise, try using the native target. */
2622 t
= find_target_at (process_stratum
);
2625 return find_default_run_target ("file I/O");
2628 /* File handle for target file operations. */
2632 /* The target on which this file is open. NULL if the target is
2633 meanwhile closed while the handle is open. */
2636 /* The file descriptor on the target. */
2639 /* Check whether this fileio_fh_t represents a closed file. */
2642 return target_fd
< 0;
2646 /* Vector of currently open file handles. The value returned by
2647 target_fileio_open and passed as the FD argument to other
2648 target_fileio_* functions is an index into this vector. This
2649 vector's entries are never freed; instead, files are marked as
2650 closed, and the handle becomes available for reuse. */
2651 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2653 /* Index into fileio_fhandles of the lowest handle that might be
2654 closed. This permits handle reuse without searching the whole
2655 list each time a new file is opened. */
2656 static int lowest_closed_fd
;
2658 /* Invalidate the target associated with open handles that were open
2659 on target TARG, since we're about to close (and maybe destroy) the
2660 target. The handles remain open from the client's perspective, but
2661 trying to do anything with them other than closing them will fail
2665 fileio_handles_invalidate_target (target_ops
*targ
)
2667 for (fileio_fh_t
&fh
: fileio_fhandles
)
2668 if (fh
.target
== targ
)
2672 /* Acquire a target fileio file descriptor. */
2675 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2677 /* Search for closed handles to reuse. */
2678 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2680 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2682 if (fh
.is_closed ())
2686 /* Push a new handle if no closed handles were found. */
2687 if (lowest_closed_fd
== fileio_fhandles
.size ())
2688 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2690 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2692 /* Should no longer be marked closed. */
2693 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2695 /* Return its index, and start the next lookup at
2697 return lowest_closed_fd
++;
2700 /* Release a target fileio file descriptor. */
2703 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2706 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2709 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2711 static fileio_fh_t
*
2712 fileio_fd_to_fh (int fd
)
2714 return &fileio_fhandles
[fd
];
2718 /* Default implementations of file i/o methods. We don't want these
2719 to delegate automatically, because we need to know which target
2720 supported the method, in order to call it directly from within
2721 pread/pwrite, etc. */
2724 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2725 int flags
, int mode
, int warn_if_slow
,
2728 *target_errno
= FILEIO_ENOSYS
;
2733 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2734 ULONGEST offset
, int *target_errno
)
2736 *target_errno
= FILEIO_ENOSYS
;
2741 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2742 ULONGEST offset
, int *target_errno
)
2744 *target_errno
= FILEIO_ENOSYS
;
2749 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2751 *target_errno
= FILEIO_ENOSYS
;
2756 target_ops::fileio_close (int fd
, int *target_errno
)
2758 *target_errno
= FILEIO_ENOSYS
;
2763 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2766 *target_errno
= FILEIO_ENOSYS
;
2770 gdb::optional
<std::string
>
2771 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2774 *target_errno
= FILEIO_ENOSYS
;
2781 target_fileio_open (struct inferior
*inf
, const char *filename
,
2782 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
2784 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2786 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2787 warn_if_slow
, target_errno
);
2789 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2795 fd
= acquire_fileio_fd (t
, fd
);
2798 fprintf_unfiltered (gdb_stdlog
,
2799 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2801 inf
== NULL
? 0 : inf
->num
,
2802 filename
, flags
, mode
,
2804 fd
!= -1 ? 0 : *target_errno
);
2808 *target_errno
= FILEIO_ENOSYS
;
2815 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2816 ULONGEST offset
, int *target_errno
)
2818 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2821 if (fh
->is_closed ())
2822 *target_errno
= EBADF
;
2823 else if (fh
->target
== NULL
)
2824 *target_errno
= EIO
;
2826 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2827 len
, offset
, target_errno
);
2830 fprintf_unfiltered (gdb_stdlog
,
2831 "target_fileio_pwrite (%d,...,%d,%s) "
2833 fd
, len
, pulongest (offset
),
2834 ret
, ret
!= -1 ? 0 : *target_errno
);
2841 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2842 ULONGEST offset
, int *target_errno
)
2844 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2847 if (fh
->is_closed ())
2848 *target_errno
= EBADF
;
2849 else if (fh
->target
== NULL
)
2850 *target_errno
= EIO
;
2852 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2853 len
, offset
, target_errno
);
2856 fprintf_unfiltered (gdb_stdlog
,
2857 "target_fileio_pread (%d,...,%d,%s) "
2859 fd
, len
, pulongest (offset
),
2860 ret
, ret
!= -1 ? 0 : *target_errno
);
2867 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2869 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2872 if (fh
->is_closed ())
2873 *target_errno
= EBADF
;
2874 else if (fh
->target
== NULL
)
2875 *target_errno
= EIO
;
2877 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2880 fprintf_unfiltered (gdb_stdlog
,
2881 "target_fileio_fstat (%d) = %d (%d)\n",
2882 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2889 target_fileio_close (int fd
, int *target_errno
)
2891 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2894 if (fh
->is_closed ())
2895 *target_errno
= EBADF
;
2898 if (fh
->target
!= NULL
)
2899 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2903 release_fileio_fd (fd
, fh
);
2907 fprintf_unfiltered (gdb_stdlog
,
2908 "target_fileio_close (%d) = %d (%d)\n",
2909 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2916 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2919 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2921 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2923 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2927 fprintf_unfiltered (gdb_stdlog
,
2928 "target_fileio_unlink (%d,%s)"
2930 inf
== NULL
? 0 : inf
->num
, filename
,
2931 ret
, ret
!= -1 ? 0 : *target_errno
);
2935 *target_errno
= FILEIO_ENOSYS
;
2941 gdb::optional
<std::string
>
2942 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2945 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2947 gdb::optional
<std::string
> ret
2948 = t
->fileio_readlink (inf
, filename
, target_errno
);
2950 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2954 fprintf_unfiltered (gdb_stdlog
,
2955 "target_fileio_readlink (%d,%s)"
2957 inf
== NULL
? 0 : inf
->num
,
2958 filename
, ret
? ret
->c_str () : "(nil)",
2959 ret
? 0 : *target_errno
);
2963 *target_errno
= FILEIO_ENOSYS
;
2967 /* Like scoped_fd, but specific to target fileio. */
2969 class scoped_target_fd
2972 explicit scoped_target_fd (int fd
) noexcept
2977 ~scoped_target_fd ()
2983 target_fileio_close (m_fd
, &target_errno
);
2987 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
2989 int get () const noexcept
2998 /* Read target file FILENAME, in the filesystem as seen by INF. If
2999 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3000 remote targets, the remote stub). Store the result in *BUF_P and
3001 return the size of the transferred data. PADDING additional bytes
3002 are available in *BUF_P. This is a helper function for
3003 target_fileio_read_alloc; see the declaration of that function for
3004 more information. */
3007 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3008 gdb_byte
**buf_p
, int padding
)
3010 size_t buf_alloc
, buf_pos
;
3015 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3016 0700, false, &target_errno
));
3017 if (fd
.get () == -1)
3020 /* Start by reading up to 4K at a time. The target will throttle
3021 this number down if necessary. */
3023 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3027 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3028 buf_alloc
- buf_pos
- padding
, buf_pos
,
3032 /* An error occurred. */
3038 /* Read all there was. */
3048 /* If the buffer is filling up, expand it. */
3049 if (buf_alloc
< buf_pos
* 2)
3052 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3062 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3065 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3070 gdb::unique_xmalloc_ptr
<char>
3071 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3075 LONGEST i
, transferred
;
3077 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3078 bufstr
= (char *) buffer
;
3080 if (transferred
< 0)
3081 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3083 if (transferred
== 0)
3084 return make_unique_xstrdup ("");
3086 bufstr
[transferred
] = 0;
3088 /* Check for embedded NUL bytes; but allow trailing NULs. */
3089 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3092 warning (_("target file %s "
3093 "contained unexpected null characters"),
3098 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3103 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3104 CORE_ADDR addr
, int len
)
3106 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3110 default_watchpoint_addr_within_range (struct target_ops
*target
,
3112 CORE_ADDR start
, int length
)
3114 return addr
>= start
&& addr
< start
+ length
;
3120 target_stack::find_beneath (const target_ops
*t
) const
3122 /* Look for a non-empty slot at stratum levels beneath T's. */
3123 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3124 if (m_stack
[stratum
] != NULL
)
3125 return m_stack
[stratum
];
3133 find_target_at (enum strata stratum
)
3135 return current_inferior ()->target_at (stratum
);
3143 target_announce_detach (int from_tty
)
3146 const char *exec_file
;
3151 exec_file
= get_exec_file (0);
3152 if (exec_file
== NULL
)
3155 pid
= inferior_ptid
.pid ();
3156 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3157 target_pid_to_str (ptid_t (pid
)).c_str ());
3160 /* The inferior process has died. Long live the inferior! */
3163 generic_mourn_inferior (void)
3165 inferior
*inf
= current_inferior ();
3167 inferior_ptid
= null_ptid
;
3169 /* Mark breakpoints uninserted in case something tries to delete a
3170 breakpoint while we delete the inferior's threads (which would
3171 fail, since the inferior is long gone). */
3172 mark_breakpoints_out ();
3175 exit_inferior (inf
);
3177 /* Note this wipes step-resume breakpoints, so needs to be done
3178 after exit_inferior, which ends up referencing the step-resume
3179 breakpoints through clear_thread_inferior_resources. */
3180 breakpoint_init_inferior (inf_exited
);
3182 registers_changed ();
3184 reopen_exec_file ();
3185 reinit_frame_cache ();
3187 if (deprecated_detach_hook
)
3188 deprecated_detach_hook ();
3191 /* Convert a normal process ID to a string. Returns the string in a
3195 normal_pid_to_str (ptid_t ptid
)
3197 return string_printf ("process %d", ptid
.pid ());
3201 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3203 return normal_pid_to_str (ptid
);
3206 /* Error-catcher for target_find_memory_regions. */
3208 dummy_find_memory_regions (struct target_ops
*self
,
3209 find_memory_region_ftype ignore1
, void *ignore2
)
3211 error (_("Command not implemented for this target."));
3215 /* Error-catcher for target_make_corefile_notes. */
3217 dummy_make_corefile_notes (struct target_ops
*self
,
3218 bfd
*ignore1
, int *ignore2
)
3220 error (_("Command not implemented for this target."));
3224 #include "target-delegates.c"
3226 /* The initial current target, so that there is always a semi-valid
3229 static dummy_target the_dummy_target
;
3236 return &the_dummy_target
;
3239 static const target_info dummy_target_info
= {
3246 dummy_target::stratum () const
3248 return dummy_stratum
;
3252 debug_target::stratum () const
3254 return debug_stratum
;
3258 dummy_target::info () const
3260 return dummy_target_info
;
3264 debug_target::info () const
3266 return beneath ()->info ();
3272 target_close (struct target_ops
*targ
)
3274 gdb_assert (!target_is_pushed (targ
));
3276 fileio_handles_invalidate_target (targ
);
3281 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3285 target_thread_alive (ptid_t ptid
)
3287 return current_top_target ()->thread_alive (ptid
);
3291 target_update_thread_list (void)
3293 current_top_target ()->update_thread_list ();
3297 target_stop (ptid_t ptid
)
3301 warning (_("May not interrupt or stop the target, ignoring attempt"));
3305 current_top_target ()->stop (ptid
);
3313 warning (_("May not interrupt or stop the target, ignoring attempt"));
3317 current_top_target ()->interrupt ();
3323 target_pass_ctrlc (void)
3325 /* Pass the Ctrl-C to the first target that has a thread
3327 for (inferior
*inf
: all_inferiors ())
3329 target_ops
*proc_target
= inf
->process_target ();
3330 if (proc_target
== NULL
)
3333 for (thread_info
*thr
: inf
->threads ())
3335 /* A thread can be THREAD_STOPPED and executing, while
3336 running an infcall. */
3337 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3339 /* We can get here quite deep in target layers. Avoid
3340 switching thread context or anything that would
3341 communicate with the target (e.g., to fetch
3342 registers), or flushing e.g., the frame cache. We
3343 just switch inferior in order to be able to call
3344 through the target_stack. */
3345 scoped_restore_current_inferior restore_inferior
;
3346 set_current_inferior (inf
);
3347 current_top_target ()->pass_ctrlc ();
3357 default_target_pass_ctrlc (struct target_ops
*ops
)
3359 target_interrupt ();
3362 /* See target/target.h. */
3365 target_stop_and_wait (ptid_t ptid
)
3367 struct target_waitstatus status
;
3368 bool was_non_stop
= non_stop
;
3373 memset (&status
, 0, sizeof (status
));
3374 target_wait (ptid
, &status
, 0);
3376 non_stop
= was_non_stop
;
3379 /* See target/target.h. */
3382 target_continue_no_signal (ptid_t ptid
)
3384 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3387 /* See target/target.h. */
3390 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3392 target_resume (ptid
, 0, signal
);
3395 /* Concatenate ELEM to LIST, a comma-separated list. */
3398 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3400 if (!list
->empty ())
3401 list
->append (", ");
3403 list
->append (elem
);
3406 /* Helper for target_options_to_string. If OPT is present in
3407 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3408 OPT is removed from TARGET_OPTIONS. */
3411 do_option (int *target_options
, std::string
*ret
,
3412 int opt
, const char *opt_str
)
3414 if ((*target_options
& opt
) != 0)
3416 str_comma_list_concat_elem (ret
, opt_str
);
3417 *target_options
&= ~opt
;
3424 target_options_to_string (int target_options
)
3428 #define DO_TARG_OPTION(OPT) \
3429 do_option (&target_options, &ret, OPT, #OPT)
3431 DO_TARG_OPTION (TARGET_WNOHANG
);
3433 if (target_options
!= 0)
3434 str_comma_list_concat_elem (&ret
, "unknown???");
3440 target_fetch_registers (struct regcache
*regcache
, int regno
)
3442 current_top_target ()->fetch_registers (regcache
, regno
);
3444 regcache
->debug_print_register ("target_fetch_registers", regno
);
3448 target_store_registers (struct regcache
*regcache
, int regno
)
3450 if (!may_write_registers
)
3451 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3453 current_top_target ()->store_registers (regcache
, regno
);
3456 regcache
->debug_print_register ("target_store_registers", regno
);
3461 target_core_of_thread (ptid_t ptid
)
3463 return current_top_target ()->core_of_thread (ptid
);
3467 simple_verify_memory (struct target_ops
*ops
,
3468 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3470 LONGEST total_xfered
= 0;
3472 while (total_xfered
< size
)
3474 ULONGEST xfered_len
;
3475 enum target_xfer_status status
;
3477 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3479 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3480 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3482 if (status
== TARGET_XFER_OK
3483 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3485 total_xfered
+= xfered_len
;
3494 /* Default implementation of memory verification. */
3497 default_verify_memory (struct target_ops
*self
,
3498 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3500 /* Start over from the top of the target stack. */
3501 return simple_verify_memory (current_top_target (),
3502 data
, memaddr
, size
);
3506 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3508 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3511 /* The documentation for this function is in its prototype declaration in
3515 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3516 enum target_hw_bp_type rw
)
3518 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3521 /* The documentation for this function is in its prototype declaration in
3525 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3526 enum target_hw_bp_type rw
)
3528 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3531 /* The documentation for this function is in its prototype declaration
3535 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3537 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3540 /* The documentation for this function is in its prototype declaration
3544 target_ranged_break_num_registers (void)
3546 return current_top_target ()->ranged_break_num_registers ();
3551 struct btrace_target_info
*
3552 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3554 return current_top_target ()->enable_btrace (ptid
, conf
);
3560 target_disable_btrace (struct btrace_target_info
*btinfo
)
3562 current_top_target ()->disable_btrace (btinfo
);
3568 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3570 current_top_target ()->teardown_btrace (btinfo
);
3576 target_read_btrace (struct btrace_data
*btrace
,
3577 struct btrace_target_info
*btinfo
,
3578 enum btrace_read_type type
)
3580 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3585 const struct btrace_config
*
3586 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3588 return current_top_target ()->btrace_conf (btinfo
);
3594 target_stop_recording (void)
3596 current_top_target ()->stop_recording ();
3602 target_save_record (const char *filename
)
3604 current_top_target ()->save_record (filename
);
3610 target_supports_delete_record ()
3612 return current_top_target ()->supports_delete_record ();
3618 target_delete_record (void)
3620 current_top_target ()->delete_record ();
3626 target_record_method (ptid_t ptid
)
3628 return current_top_target ()->record_method (ptid
);
3634 target_record_is_replaying (ptid_t ptid
)
3636 return current_top_target ()->record_is_replaying (ptid
);
3642 target_record_will_replay (ptid_t ptid
, int dir
)
3644 return current_top_target ()->record_will_replay (ptid
, dir
);
3650 target_record_stop_replaying (void)
3652 current_top_target ()->record_stop_replaying ();
3658 target_goto_record_begin (void)
3660 current_top_target ()->goto_record_begin ();
3666 target_goto_record_end (void)
3668 current_top_target ()->goto_record_end ();
3674 target_goto_record (ULONGEST insn
)
3676 current_top_target ()->goto_record (insn
);
3682 target_insn_history (int size
, gdb_disassembly_flags flags
)
3684 current_top_target ()->insn_history (size
, flags
);
3690 target_insn_history_from (ULONGEST from
, int size
,
3691 gdb_disassembly_flags flags
)
3693 current_top_target ()->insn_history_from (from
, size
, flags
);
3699 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3700 gdb_disassembly_flags flags
)
3702 current_top_target ()->insn_history_range (begin
, end
, flags
);
3708 target_call_history (int size
, record_print_flags flags
)
3710 current_top_target ()->call_history (size
, flags
);
3716 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3718 current_top_target ()->call_history_from (begin
, size
, flags
);
3724 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3726 current_top_target ()->call_history_range (begin
, end
, flags
);
3731 const struct frame_unwind
*
3732 target_get_unwinder (void)
3734 return current_top_target ()->get_unwinder ();
3739 const struct frame_unwind
*
3740 target_get_tailcall_unwinder (void)
3742 return current_top_target ()->get_tailcall_unwinder ();
3748 target_prepare_to_generate_core (void)
3750 current_top_target ()->prepare_to_generate_core ();
3756 target_done_generating_core (void)
3758 current_top_target ()->done_generating_core ();
3763 static char targ_desc
[] =
3764 "Names of targets and files being debugged.\nShows the entire \
3765 stack of targets currently in use (including the exec-file,\n\
3766 core-file, and process, if any), as well as the symbol file name.";
3769 default_rcmd (struct target_ops
*self
, const char *command
,
3770 struct ui_file
*output
)
3772 error (_("\"monitor\" command not supported by this target."));
3776 do_monitor_command (const char *cmd
, int from_tty
)
3778 target_rcmd (cmd
, gdb_stdtarg
);
3781 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3785 flash_erase_command (const char *cmd
, int from_tty
)
3787 /* Used to communicate termination of flash operations to the target. */
3788 bool found_flash_region
= false;
3789 struct gdbarch
*gdbarch
= target_gdbarch ();
3791 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3793 /* Iterate over all memory regions. */
3794 for (const mem_region
&m
: mem_regions
)
3796 /* Is this a flash memory region? */
3797 if (m
.attrib
.mode
== MEM_FLASH
)
3799 found_flash_region
= true;
3800 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3802 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3804 current_uiout
->message (_("Erasing flash memory region at address "));
3805 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3806 current_uiout
->message (", size = ");
3807 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3808 current_uiout
->message ("\n");
3812 /* Did we do any flash operations? If so, we need to finalize them. */
3813 if (found_flash_region
)
3814 target_flash_done ();
3816 current_uiout
->message (_("No flash memory regions found.\n"));
3819 /* Print the name of each layers of our target stack. */
3822 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3824 printf_filtered (_("The current target stack is:\n"));
3826 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3828 if (t
->stratum () == debug_stratum
)
3830 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3837 target_async (int enable
)
3839 infrun_async (enable
);
3840 current_top_target ()->async (enable
);
3846 target_thread_events (int enable
)
3848 current_top_target ()->thread_events (enable
);
3851 /* Controls if targets can report that they can/are async. This is
3852 just for maintainers to use when debugging gdb. */
3853 bool target_async_permitted
= true;
3855 /* The set command writes to this variable. If the inferior is
3856 executing, target_async_permitted is *not* updated. */
3857 static bool target_async_permitted_1
= true;
3860 maint_set_target_async_command (const char *args
, int from_tty
,
3861 struct cmd_list_element
*c
)
3863 if (have_live_inferiors ())
3865 target_async_permitted_1
= target_async_permitted
;
3866 error (_("Cannot change this setting while the inferior is running."));
3869 target_async_permitted
= target_async_permitted_1
;
3873 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3874 struct cmd_list_element
*c
,
3877 fprintf_filtered (file
,
3878 _("Controlling the inferior in "
3879 "asynchronous mode is %s.\n"), value
);
3882 /* Return true if the target operates in non-stop mode even with "set
3886 target_always_non_stop_p (void)
3888 return current_top_target ()->always_non_stop_p ();
3894 target_is_non_stop_p (void)
3897 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3898 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3899 && target_always_non_stop_p ()));
3905 exists_non_stop_target ()
3907 if (target_is_non_stop_p ())
3910 scoped_restore_current_thread restore_thread
;
3912 for (inferior
*inf
: all_inferiors ())
3914 switch_to_inferior_no_thread (inf
);
3915 if (target_is_non_stop_p ())
3922 /* Controls if targets can report that they always run in non-stop
3923 mode. This is just for maintainers to use when debugging gdb. */
3924 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3926 /* The set command writes to this variable. If the inferior is
3927 executing, target_non_stop_enabled is *not* updated. */
3928 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3930 /* Implementation of "maint set target-non-stop". */
3933 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3934 struct cmd_list_element
*c
)
3936 if (have_live_inferiors ())
3938 target_non_stop_enabled_1
= target_non_stop_enabled
;
3939 error (_("Cannot change this setting while the inferior is running."));
3942 target_non_stop_enabled
= target_non_stop_enabled_1
;
3945 /* Implementation of "maint show target-non-stop". */
3948 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3949 struct cmd_list_element
*c
,
3952 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3953 fprintf_filtered (file
,
3954 _("Whether the target is always in non-stop mode "
3955 "is %s (currently %s).\n"), value
,
3956 target_always_non_stop_p () ? "on" : "off");
3958 fprintf_filtered (file
,
3959 _("Whether the target is always in non-stop mode "
3960 "is %s.\n"), value
);
3963 /* Temporary copies of permission settings. */
3965 static bool may_write_registers_1
= true;
3966 static bool may_write_memory_1
= true;
3967 static bool may_insert_breakpoints_1
= true;
3968 static bool may_insert_tracepoints_1
= true;
3969 static bool may_insert_fast_tracepoints_1
= true;
3970 static bool may_stop_1
= true;
3972 /* Make the user-set values match the real values again. */
3975 update_target_permissions (void)
3977 may_write_registers_1
= may_write_registers
;
3978 may_write_memory_1
= may_write_memory
;
3979 may_insert_breakpoints_1
= may_insert_breakpoints
;
3980 may_insert_tracepoints_1
= may_insert_tracepoints
;
3981 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3982 may_stop_1
= may_stop
;
3985 /* The one function handles (most of) the permission flags in the same
3989 set_target_permissions (const char *args
, int from_tty
,
3990 struct cmd_list_element
*c
)
3992 if (target_has_execution
)
3994 update_target_permissions ();
3995 error (_("Cannot change this setting while the inferior is running."));
3998 /* Make the real values match the user-changed values. */
3999 may_write_registers
= may_write_registers_1
;
4000 may_insert_breakpoints
= may_insert_breakpoints_1
;
4001 may_insert_tracepoints
= may_insert_tracepoints_1
;
4002 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4003 may_stop
= may_stop_1
;
4004 update_observer_mode ();
4007 /* Set memory write permission independently of observer mode. */
4010 set_write_memory_permission (const char *args
, int from_tty
,
4011 struct cmd_list_element
*c
)
4013 /* Make the real values match the user-changed values. */
4014 may_write_memory
= may_write_memory_1
;
4015 update_observer_mode ();
4018 void _initialize_target ();
4021 _initialize_target ()
4023 the_debug_target
= new debug_target ();
4025 add_info ("target", info_target_command
, targ_desc
);
4026 add_info ("files", info_target_command
, targ_desc
);
4028 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4029 Set target debugging."), _("\
4030 Show target debugging."), _("\
4031 When non-zero, target debugging is enabled. Higher numbers are more\n\
4035 &setdebuglist
, &showdebuglist
);
4037 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4038 &trust_readonly
, _("\
4039 Set mode for reading from readonly sections."), _("\
4040 Show mode for reading from readonly sections."), _("\
4041 When this mode is on, memory reads from readonly sections (such as .text)\n\
4042 will be read from the object file instead of from the target. This will\n\
4043 result in significant performance improvement for remote targets."),
4045 show_trust_readonly
,
4046 &setlist
, &showlist
);
4048 add_com ("monitor", class_obscure
, do_monitor_command
,
4049 _("Send a command to the remote monitor (remote targets only)."));
4051 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4052 _("Print the name of each layer of the internal target stack."),
4053 &maintenanceprintlist
);
4055 add_setshow_boolean_cmd ("target-async", no_class
,
4056 &target_async_permitted_1
, _("\
4057 Set whether gdb controls the inferior in asynchronous mode."), _("\
4058 Show whether gdb controls the inferior in asynchronous mode."), _("\
4059 Tells gdb whether to control the inferior in asynchronous mode."),
4060 maint_set_target_async_command
,
4061 maint_show_target_async_command
,
4062 &maintenance_set_cmdlist
,
4063 &maintenance_show_cmdlist
);
4065 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4066 &target_non_stop_enabled_1
, _("\
4067 Set whether gdb always controls the inferior in non-stop mode."), _("\
4068 Show whether gdb always controls the inferior in non-stop mode."), _("\
4069 Tells gdb whether to control the inferior in non-stop mode."),
4070 maint_set_target_non_stop_command
,
4071 maint_show_target_non_stop_command
,
4072 &maintenance_set_cmdlist
,
4073 &maintenance_show_cmdlist
);
4075 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4076 &may_write_registers_1
, _("\
4077 Set permission to write into registers."), _("\
4078 Show permission to write into registers."), _("\
4079 When this permission is on, GDB may write into the target's registers.\n\
4080 Otherwise, any sort of write attempt will result in an error."),
4081 set_target_permissions
, NULL
,
4082 &setlist
, &showlist
);
4084 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4085 &may_write_memory_1
, _("\
4086 Set permission to write into target memory."), _("\
4087 Show permission to write into target memory."), _("\
4088 When this permission is on, GDB may write into the target's memory.\n\
4089 Otherwise, any sort of write attempt will result in an error."),
4090 set_write_memory_permission
, NULL
,
4091 &setlist
, &showlist
);
4093 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4094 &may_insert_breakpoints_1
, _("\
4095 Set permission to insert breakpoints in the target."), _("\
4096 Show permission to insert breakpoints in the target."), _("\
4097 When this permission is on, GDB may insert breakpoints in the program.\n\
4098 Otherwise, any sort of insertion attempt will result in an error."),
4099 set_target_permissions
, NULL
,
4100 &setlist
, &showlist
);
4102 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4103 &may_insert_tracepoints_1
, _("\
4104 Set permission to insert tracepoints in the target."), _("\
4105 Show permission to insert tracepoints in the target."), _("\
4106 When this permission is on, GDB may insert tracepoints in the program.\n\
4107 Otherwise, any sort of insertion attempt will result in an error."),
4108 set_target_permissions
, NULL
,
4109 &setlist
, &showlist
);
4111 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4112 &may_insert_fast_tracepoints_1
, _("\
4113 Set permission to insert fast tracepoints in the target."), _("\
4114 Show permission to insert fast tracepoints in the target."), _("\
4115 When this permission is on, GDB may insert fast tracepoints.\n\
4116 Otherwise, any sort of insertion attempt will result in an error."),
4117 set_target_permissions
, NULL
,
4118 &setlist
, &showlist
);
4120 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4122 Set permission to interrupt or signal the target."), _("\
4123 Show permission to interrupt or signal the target."), _("\
4124 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4125 Otherwise, any attempt to interrupt or stop will be ignored."),
4126 set_target_permissions
, NULL
,
4127 &setlist
, &showlist
);
4129 add_com ("flash-erase", no_class
, flash_erase_command
,
4130 _("Erase all flash memory regions."));
4132 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4133 &auto_connect_native_target
, _("\
4134 Set whether GDB may automatically connect to the native target."), _("\
4135 Show whether GDB may automatically connect to the native target."), _("\
4136 When on, and GDB is not connected to a target yet, GDB\n\
4137 attempts \"run\" and other commands with the native target."),
4138 NULL
, show_auto_connect_native_target
,
4139 &setlist
, &showlist
);