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
);
171 /* The user just typed 'target' without the name of a target. */
174 target_command (const char *arg
, int from_tty
)
176 fputs_filtered ("Argument required (target name). Try `help target'\n",
181 target_has_all_memory_1 (void)
183 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
184 if (t
->has_all_memory ())
191 target_has_memory_1 (void)
193 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
194 if (t
->has_memory ())
201 target_has_stack_1 (void)
203 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
211 target_has_registers_1 (void)
213 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
214 if (t
->has_registers ())
221 target_has_execution_1 (inferior
*inf
)
223 for (target_ops
*t
= inf
->top_target ();
225 t
= inf
->find_target_beneath (t
))
226 if (t
->has_execution (inf
))
233 target_has_execution_current (void)
235 return target_has_execution_1 (current_inferior ());
238 /* This is used to implement the various target commands. */
241 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
243 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
244 target_open_ftype
*func
= target_factories
[ti
];
247 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
250 func (args
, from_tty
);
253 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
254 ti
->shortname
, args
, from_tty
);
260 add_target (const target_info
&t
, target_open_ftype
*func
,
261 completer_ftype
*completer
)
263 struct cmd_list_element
*c
;
265 auto &func_slot
= target_factories
[&t
];
266 if (func_slot
!= nullptr)
267 internal_error (__FILE__
, __LINE__
,
268 _("target already added (\"%s\")."), t
.shortname
);
271 if (targetlist
== NULL
)
272 add_prefix_cmd ("target", class_run
, target_command
, _("\
273 Connect to a target machine or process.\n\
274 The first argument is the type or protocol of the target machine.\n\
275 Remaining arguments are interpreted by the target protocol. For more\n\
276 information on the arguments for a particular protocol, type\n\
277 `help target ' followed by the protocol name."),
278 &targetlist
, "target ", 0, &cmdlist
);
279 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
280 set_cmd_context (c
, (void *) &t
);
281 set_cmd_sfunc (c
, open_target
);
282 if (completer
!= NULL
)
283 set_cmd_completer (c
, completer
);
289 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
291 struct cmd_list_element
*c
;
294 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
296 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
297 set_cmd_sfunc (c
, open_target
);
298 set_cmd_context (c
, (void *) &tinfo
);
299 alt
= xstrprintf ("target %s", tinfo
.shortname
);
300 deprecate_cmd (c
, alt
);
308 current_top_target ()->kill ();
312 target_load (const char *arg
, int from_tty
)
314 target_dcache_invalidate ();
315 current_top_target ()->load (arg
, from_tty
);
320 target_terminal_state
target_terminal::m_terminal_state
321 = target_terminal_state::is_ours
;
323 /* See target/target.h. */
326 target_terminal::init (void)
328 current_top_target ()->terminal_init ();
330 m_terminal_state
= target_terminal_state::is_ours
;
333 /* See target/target.h. */
336 target_terminal::inferior (void)
338 struct ui
*ui
= current_ui
;
340 /* A background resume (``run&'') should leave GDB in control of the
342 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
345 /* Since we always run the inferior in the main console (unless "set
346 inferior-tty" is in effect), when some UI other than the main one
347 calls target_terminal::inferior, then we leave the main UI's
348 terminal settings as is. */
352 /* If GDB is resuming the inferior in the foreground, install
353 inferior's terminal modes. */
355 struct inferior
*inf
= current_inferior ();
357 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
359 current_top_target ()->terminal_inferior ();
360 inf
->terminal_state
= target_terminal_state::is_inferior
;
363 m_terminal_state
= target_terminal_state::is_inferior
;
365 /* If the user hit C-c before, pretend that it was hit right
367 if (check_quit_flag ())
368 target_pass_ctrlc ();
371 /* See target/target.h. */
374 target_terminal::restore_inferior (void)
376 struct ui
*ui
= current_ui
;
378 /* See target_terminal::inferior(). */
379 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
382 /* Restore the terminal settings of inferiors that were in the
383 foreground but are now ours_for_output due to a temporary
384 target_target::ours_for_output() call. */
387 scoped_restore_current_inferior restore_inferior
;
389 for (::inferior
*inf
: all_inferiors ())
391 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
393 set_current_inferior (inf
);
394 current_top_target ()->terminal_inferior ();
395 inf
->terminal_state
= target_terminal_state::is_inferior
;
400 m_terminal_state
= target_terminal_state::is_inferior
;
402 /* If the user hit C-c before, pretend that it was hit right
404 if (check_quit_flag ())
405 target_pass_ctrlc ();
408 /* Switch terminal state to DESIRED_STATE, either is_ours, or
409 is_ours_for_output. */
412 target_terminal_is_ours_kind (target_terminal_state desired_state
)
414 scoped_restore_current_inferior restore_inferior
;
416 /* Must do this in two passes. First, have all inferiors save the
417 current terminal settings. Then, after all inferiors have add a
418 chance to safely save the terminal settings, restore GDB's
419 terminal settings. */
421 for (inferior
*inf
: all_inferiors ())
423 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
425 set_current_inferior (inf
);
426 current_top_target ()->terminal_save_inferior ();
430 for (inferior
*inf
: all_inferiors ())
432 /* Note we don't check is_inferior here like above because we
433 need to handle 'is_ours_for_output -> is_ours' too. Careful
434 to never transition from 'is_ours' to 'is_ours_for_output',
436 if (inf
->terminal_state
!= target_terminal_state::is_ours
437 && inf
->terminal_state
!= desired_state
)
439 set_current_inferior (inf
);
440 if (desired_state
== target_terminal_state::is_ours
)
441 current_top_target ()->terminal_ours ();
442 else if (desired_state
== target_terminal_state::is_ours_for_output
)
443 current_top_target ()->terminal_ours_for_output ();
445 gdb_assert_not_reached ("unhandled desired state");
446 inf
->terminal_state
= desired_state
;
451 /* See target/target.h. */
454 target_terminal::ours ()
456 struct ui
*ui
= current_ui
;
458 /* See target_terminal::inferior. */
462 if (m_terminal_state
== target_terminal_state::is_ours
)
465 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
466 m_terminal_state
= target_terminal_state::is_ours
;
469 /* See target/target.h. */
472 target_terminal::ours_for_output ()
474 struct ui
*ui
= current_ui
;
476 /* See target_terminal::inferior. */
480 if (!target_terminal::is_inferior ())
483 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
484 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
487 /* See target/target.h. */
490 target_terminal::info (const char *arg
, int from_tty
)
492 current_top_target ()->terminal_info (arg
, from_tty
);
498 target_supports_terminal_ours (void)
500 /* The current top target is the target at the top of the target
501 stack of the current inferior. While normally there's always an
502 inferior, we must check for nullptr here because we can get here
503 very early during startup, before the initial inferior is first
505 inferior
*inf
= current_inferior ();
509 return inf
->top_target ()->supports_terminal_ours ();
515 error (_("You can't do that when your target is `%s'"),
516 current_top_target ()->shortname ());
522 error (_("You can't do that without a process to debug."));
526 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
528 printf_unfiltered (_("No saved terminal information.\n"));
531 /* A default implementation for the to_get_ada_task_ptid target method.
533 This function builds the PTID by using both LWP and TID as part of
534 the PTID lwp and tid elements. The pid used is the pid of the
538 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
540 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
543 static enum exec_direction_kind
544 default_execution_direction (struct target_ops
*self
)
546 if (!target_can_execute_reverse
)
548 else if (!target_can_async_p ())
551 gdb_assert_not_reached ("\
552 to_execution_direction must be implemented for reverse async");
558 decref_target (target_ops
*t
)
561 if (t
->refcount () == 0)
563 if (t
->stratum () == process_stratum
)
564 connection_list_remove (as_process_stratum_target (t
));
572 target_stack::push (target_ops
*t
)
576 strata stratum
= t
->stratum ();
578 if (stratum
== process_stratum
)
579 connection_list_add (as_process_stratum_target (t
));
581 /* If there's already a target at this stratum, remove it. */
583 if (m_stack
[stratum
] != NULL
)
584 unpush (m_stack
[stratum
]);
586 /* Now add the new one. */
587 m_stack
[stratum
] = t
;
596 push_target (struct target_ops
*t
)
598 current_inferior ()->push_target (t
);
604 push_target (target_ops_up
&&t
)
606 current_inferior ()->push_target (t
.get ());
613 unpush_target (struct target_ops
*t
)
615 return current_inferior ()->unpush_target (t
);
621 target_stack::unpush (target_ops
*t
)
623 gdb_assert (t
!= NULL
);
625 strata stratum
= t
->stratum ();
627 if (stratum
== dummy_stratum
)
628 internal_error (__FILE__
, __LINE__
,
629 _("Attempt to unpush the dummy target"));
631 /* Look for the specified target. Note that a target can only occur
632 once in the target stack. */
634 if (m_stack
[stratum
] != t
)
636 /* If T wasn't pushed, quit. Only open targets should be
641 /* Unchain the target. */
642 m_stack
[stratum
] = NULL
;
644 if (m_top
== stratum
)
645 m_top
= t
->beneath ()->stratum ();
647 /* Finally close the target, if there are no inferiors
648 referencing this target still. Note we do this after unchaining,
649 so any target method calls from within the target_close
650 implementation don't end up in T anymore. Do leave the target
651 open if we have are other inferiors referencing this target
658 /* Unpush TARGET and assert that it worked. */
661 unpush_target_and_assert (struct target_ops
*target
)
663 if (!unpush_target (target
))
665 fprintf_unfiltered (gdb_stderr
,
666 "pop_all_targets couldn't find target %s\n",
667 target
->shortname ());
668 internal_error (__FILE__
, __LINE__
,
669 _("failed internal consistency check"));
674 pop_all_targets_above (enum strata above_stratum
)
676 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
677 unpush_target_and_assert (current_top_target ());
683 pop_all_targets_at_and_above (enum strata stratum
)
685 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
686 unpush_target_and_assert (current_top_target ());
690 pop_all_targets (void)
692 pop_all_targets_above (dummy_stratum
);
695 /* Return true if T is now pushed in the current inferior's target
696 stack. Return false otherwise. */
699 target_is_pushed (target_ops
*t
)
701 return current_inferior ()->target_is_pushed (t
);
704 /* Default implementation of to_get_thread_local_address. */
707 generic_tls_error (void)
709 throw_error (TLS_GENERIC_ERROR
,
710 _("Cannot find thread-local variables on this target"));
713 /* Using the objfile specified in OBJFILE, find the address for the
714 current thread's thread-local storage with offset OFFSET. */
716 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
718 volatile CORE_ADDR addr
= 0;
719 struct target_ops
*target
= current_top_target ();
720 struct gdbarch
*gdbarch
= target_gdbarch ();
722 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
724 ptid_t ptid
= inferior_ptid
;
730 /* Fetch the load module address for this objfile. */
731 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
734 if (gdbarch_get_thread_local_address_p (gdbarch
))
735 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
738 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
740 /* If an error occurred, print TLS related messages here. Otherwise,
741 throw the error to some higher catcher. */
742 catch (const gdb_exception
&ex
)
744 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
748 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
749 error (_("Cannot find thread-local variables "
750 "in this thread library."));
752 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
753 if (objfile_is_library
)
754 error (_("Cannot find shared library `%s' in dynamic"
755 " linker's load module list"), objfile_name (objfile
));
757 error (_("Cannot find executable file `%s' in dynamic"
758 " linker's load module list"), objfile_name (objfile
));
760 case TLS_NOT_ALLOCATED_YET_ERROR
:
761 if (objfile_is_library
)
762 error (_("The inferior has not yet allocated storage for"
763 " thread-local variables in\n"
764 "the shared library `%s'\n"
766 objfile_name (objfile
),
767 target_pid_to_str (ptid
).c_str ());
769 error (_("The inferior has not yet allocated storage for"
770 " thread-local variables in\n"
771 "the executable `%s'\n"
773 objfile_name (objfile
),
774 target_pid_to_str (ptid
).c_str ());
776 case TLS_GENERIC_ERROR
:
777 if (objfile_is_library
)
778 error (_("Cannot find thread-local storage for %s, "
779 "shared library %s:\n%s"),
780 target_pid_to_str (ptid
).c_str (),
781 objfile_name (objfile
), ex
.what ());
783 error (_("Cannot find thread-local storage for %s, "
784 "executable file %s:\n%s"),
785 target_pid_to_str (ptid
).c_str (),
786 objfile_name (objfile
), ex
.what ());
795 error (_("Cannot find thread-local variables on this target"));
801 target_xfer_status_to_string (enum target_xfer_status status
)
803 #define CASE(X) case X: return #X
806 CASE(TARGET_XFER_E_IO
);
807 CASE(TARGET_XFER_UNAVAILABLE
);
816 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
818 /* target_read_string -- read a null terminated string, up to LEN bytes,
819 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
820 Set *STRING to a pointer to malloc'd memory containing the data; the caller
821 is responsible for freeing it. Return the number of bytes successfully
825 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
826 int len
, int *errnop
)
832 int buffer_allocated
;
834 unsigned int nbytes_read
= 0;
838 /* Small for testing. */
839 buffer_allocated
= 4;
840 buffer
= (char *) xmalloc (buffer_allocated
);
845 tlen
= MIN (len
, 4 - (memaddr
& 3));
846 offset
= memaddr
& 3;
848 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
851 /* The transfer request might have crossed the boundary to an
852 unallocated region of memory. Retry the transfer, requesting
856 errcode
= target_read_memory (memaddr
, buf
, 1);
861 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
865 bytes
= bufptr
- buffer
;
866 buffer_allocated
*= 2;
867 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
868 bufptr
= buffer
+ bytes
;
871 for (i
= 0; i
< tlen
; i
++)
873 *bufptr
++ = buf
[i
+ offset
];
874 if (buf
[i
+ offset
] == '\000')
876 nbytes_read
+= i
+ 1;
886 string
->reset (buffer
);
892 struct target_section_table
*
893 target_get_section_table (struct target_ops
*target
)
895 return target
->get_section_table ();
898 /* Find a section containing ADDR. */
900 struct target_section
*
901 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
903 struct target_section_table
*table
= target_get_section_table (target
);
904 struct target_section
*secp
;
909 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
911 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
918 /* Helper for the memory xfer routines. Checks the attributes of the
919 memory region of MEMADDR against the read or write being attempted.
920 If the access is permitted returns true, otherwise returns false.
921 REGION_P is an optional output parameter. If not-NULL, it is
922 filled with a pointer to the memory region of MEMADDR. REG_LEN
923 returns LEN trimmed to the end of the region. This is how much the
924 caller can continue requesting, if the access is permitted. A
925 single xfer request must not straddle memory region boundaries. */
928 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
929 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
930 struct mem_region
**region_p
)
932 struct mem_region
*region
;
934 region
= lookup_mem_region (memaddr
);
936 if (region_p
!= NULL
)
939 switch (region
->attrib
.mode
)
942 if (writebuf
!= NULL
)
952 /* We only support writing to flash during "load" for now. */
953 if (writebuf
!= NULL
)
954 error (_("Writing to flash memory forbidden in this context"));
961 /* region->hi == 0 means there's no upper bound. */
962 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
965 *reg_len
= region
->hi
- memaddr
;
970 /* Read memory from more than one valid target. A core file, for
971 instance, could have some of memory but delegate other bits to
972 the target below it. So, we must manually try all targets. */
974 enum target_xfer_status
975 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
976 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
977 ULONGEST
*xfered_len
)
979 enum target_xfer_status res
;
983 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
984 readbuf
, writebuf
, memaddr
, len
,
986 if (res
== TARGET_XFER_OK
)
989 /* Stop if the target reports that the memory is not available. */
990 if (res
== TARGET_XFER_UNAVAILABLE
)
993 /* We want to continue past core files to executables, but not
994 past a running target's memory. */
995 if (ops
->has_all_memory ())
998 ops
= ops
->beneath ();
1000 while (ops
!= NULL
);
1002 /* The cache works at the raw memory level. Make sure the cache
1003 gets updated with raw contents no matter what kind of memory
1004 object was originally being written. Note we do write-through
1005 first, so that if it fails, we don't write to the cache contents
1006 that never made it to the target. */
1007 if (writebuf
!= NULL
1008 && inferior_ptid
!= null_ptid
1009 && target_dcache_init_p ()
1010 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1012 DCACHE
*dcache
= target_dcache_get ();
1014 /* Note that writing to an area of memory which wasn't present
1015 in the cache doesn't cause it to be loaded in. */
1016 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1022 /* Perform a partial memory transfer.
1023 For docs see target.h, to_xfer_partial. */
1025 static enum target_xfer_status
1026 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1027 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1028 ULONGEST len
, ULONGEST
*xfered_len
)
1030 enum target_xfer_status res
;
1032 struct mem_region
*region
;
1033 struct inferior
*inf
;
1035 /* For accesses to unmapped overlay sections, read directly from
1036 files. Must do this first, as MEMADDR may need adjustment. */
1037 if (readbuf
!= NULL
&& overlay_debugging
)
1039 struct obj_section
*section
= find_pc_overlay (memaddr
);
1041 if (pc_in_unmapped_range (memaddr
, section
))
1043 struct target_section_table
*table
1044 = target_get_section_table (ops
);
1045 const char *section_name
= section
->the_bfd_section
->name
;
1047 memaddr
= overlay_mapped_address (memaddr
, section
);
1048 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1049 memaddr
, len
, xfered_len
,
1051 table
->sections_end
,
1056 /* Try the executable files, if "trust-readonly-sections" is set. */
1057 if (readbuf
!= NULL
&& trust_readonly
)
1059 struct target_section
*secp
;
1060 struct target_section_table
*table
;
1062 secp
= target_section_by_addr (ops
, memaddr
);
1064 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1066 table
= target_get_section_table (ops
);
1067 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1068 memaddr
, len
, xfered_len
,
1070 table
->sections_end
,
1075 /* Try GDB's internal data cache. */
1077 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1079 return TARGET_XFER_E_IO
;
1081 if (inferior_ptid
!= null_ptid
)
1082 inf
= current_inferior ();
1088 /* The dcache reads whole cache lines; that doesn't play well
1089 with reading from a trace buffer, because reading outside of
1090 the collected memory range fails. */
1091 && get_traceframe_number () == -1
1092 && (region
->attrib
.cache
1093 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1094 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1096 DCACHE
*dcache
= target_dcache_get_or_init ();
1098 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1099 reg_len
, xfered_len
);
1102 /* If none of those methods found the memory we wanted, fall back
1103 to a target partial transfer. Normally a single call to
1104 to_xfer_partial is enough; if it doesn't recognize an object
1105 it will call the to_xfer_partial of the next target down.
1106 But for memory this won't do. Memory is the only target
1107 object which can be read from more than one valid target.
1108 A core file, for instance, could have some of memory but
1109 delegate other bits to the target below it. So, we must
1110 manually try all targets. */
1112 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1115 /* If we still haven't got anything, return the last error. We
1120 /* Perform a partial memory transfer. For docs see target.h,
1123 static enum target_xfer_status
1124 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1125 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1126 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1128 enum target_xfer_status res
;
1130 /* Zero length requests are ok and require no work. */
1132 return TARGET_XFER_EOF
;
1134 memaddr
= address_significant (target_gdbarch (), memaddr
);
1136 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1137 breakpoint insns, thus hiding out from higher layers whether
1138 there are software breakpoints inserted in the code stream. */
1139 if (readbuf
!= NULL
)
1141 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1144 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1145 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1149 /* A large write request is likely to be partially satisfied
1150 by memory_xfer_partial_1. We will continually malloc
1151 and free a copy of the entire write request for breakpoint
1152 shadow handling even though we only end up writing a small
1153 subset of it. Cap writes to a limit specified by the target
1154 to mitigate this. */
1155 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1157 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1158 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1159 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1166 scoped_restore_tmpl
<int>
1167 make_scoped_restore_show_memory_breakpoints (int show
)
1169 return make_scoped_restore (&show_memory_breakpoints
, show
);
1172 /* For docs see target.h, to_xfer_partial. */
1174 enum target_xfer_status
1175 target_xfer_partial (struct target_ops
*ops
,
1176 enum target_object object
, const char *annex
,
1177 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1178 ULONGEST offset
, ULONGEST len
,
1179 ULONGEST
*xfered_len
)
1181 enum target_xfer_status retval
;
1183 /* Transfer is done when LEN is zero. */
1185 return TARGET_XFER_EOF
;
1187 if (writebuf
&& !may_write_memory
)
1188 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1189 core_addr_to_string_nz (offset
), plongest (len
));
1193 /* If this is a memory transfer, let the memory-specific code
1194 have a look at it instead. Memory transfers are more
1196 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1197 || object
== TARGET_OBJECT_CODE_MEMORY
)
1198 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1199 writebuf
, offset
, len
, xfered_len
);
1200 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1202 /* Skip/avoid accessing the target if the memory region
1203 attributes block the access. Check this here instead of in
1204 raw_memory_xfer_partial as otherwise we'd end up checking
1205 this twice in the case of the memory_xfer_partial path is
1206 taken; once before checking the dcache, and another in the
1207 tail call to raw_memory_xfer_partial. */
1208 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1210 return TARGET_XFER_E_IO
;
1212 /* Request the normal memory object from other layers. */
1213 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1217 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1218 writebuf
, offset
, len
, xfered_len
);
1222 const unsigned char *myaddr
= NULL
;
1224 fprintf_unfiltered (gdb_stdlog
,
1225 "%s:target_xfer_partial "
1226 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1229 (annex
? annex
: "(null)"),
1230 host_address_to_string (readbuf
),
1231 host_address_to_string (writebuf
),
1232 core_addr_to_string_nz (offset
),
1233 pulongest (len
), retval
,
1234 pulongest (*xfered_len
));
1240 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1244 fputs_unfiltered (", bytes =", gdb_stdlog
);
1245 for (i
= 0; i
< *xfered_len
; i
++)
1247 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1249 if (targetdebug
< 2 && i
> 0)
1251 fprintf_unfiltered (gdb_stdlog
, " ...");
1254 fprintf_unfiltered (gdb_stdlog
, "\n");
1257 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1261 fputc_unfiltered ('\n', gdb_stdlog
);
1264 /* Check implementations of to_xfer_partial update *XFERED_LEN
1265 properly. Do assertion after printing debug messages, so that we
1266 can find more clues on assertion failure from debugging messages. */
1267 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1268 gdb_assert (*xfered_len
> 0);
1273 /* Read LEN bytes of target memory at address MEMADDR, placing the
1274 results in GDB's memory at MYADDR. Returns either 0 for success or
1275 -1 if any error occurs.
1277 If an error occurs, no guarantee is made about the contents of the data at
1278 MYADDR. In particular, the caller should not depend upon partial reads
1279 filling the buffer with good data. There is no way for the caller to know
1280 how much good data might have been transfered anyway. Callers that can
1281 deal with partial reads should call target_read (which will retry until
1282 it makes no progress, and then return how much was transferred). */
1285 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1287 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1288 myaddr
, memaddr
, len
) == len
)
1294 /* See target/target.h. */
1297 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1302 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1305 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1306 gdbarch_byte_order (target_gdbarch ()));
1310 /* Like target_read_memory, but specify explicitly that this is a read
1311 from the target's raw memory. That is, this read bypasses the
1312 dcache, breakpoint shadowing, etc. */
1315 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1317 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1318 myaddr
, memaddr
, len
) == len
)
1324 /* Like target_read_memory, but specify explicitly that this is a read from
1325 the target's stack. This may trigger different cache behavior. */
1328 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1330 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1331 myaddr
, memaddr
, len
) == len
)
1337 /* Like target_read_memory, but specify explicitly that this is a read from
1338 the target's code. This may trigger different cache behavior. */
1341 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1343 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1344 myaddr
, memaddr
, len
) == len
)
1350 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1351 Returns either 0 for success or -1 if any error occurs. If an
1352 error occurs, no guarantee is made about how much data got written.
1353 Callers that can deal with partial writes should call
1357 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1359 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1360 myaddr
, memaddr
, len
) == len
)
1366 /* Write LEN bytes from MYADDR to target raw memory at address
1367 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1368 If an error occurs, no guarantee is made about how much data got
1369 written. Callers that can deal with partial writes should call
1373 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1375 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1376 myaddr
, memaddr
, len
) == len
)
1382 /* Fetch the target's memory map. */
1384 std::vector
<mem_region
>
1385 target_memory_map (void)
1387 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1388 if (result
.empty ())
1391 std::sort (result
.begin (), result
.end ());
1393 /* Check that regions do not overlap. Simultaneously assign
1394 a numbering for the "mem" commands to use to refer to
1396 mem_region
*last_one
= NULL
;
1397 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1399 mem_region
*this_one
= &result
[ix
];
1400 this_one
->number
= ix
;
1402 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1404 warning (_("Overlapping regions in memory map: ignoring"));
1405 return std::vector
<mem_region
> ();
1408 last_one
= this_one
;
1415 target_flash_erase (ULONGEST address
, LONGEST length
)
1417 current_top_target ()->flash_erase (address
, length
);
1421 target_flash_done (void)
1423 current_top_target ()->flash_done ();
1427 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1428 struct cmd_list_element
*c
, const char *value
)
1430 fprintf_filtered (file
,
1431 _("Mode for reading from readonly sections is %s.\n"),
1435 /* Target vector read/write partial wrapper functions. */
1437 static enum target_xfer_status
1438 target_read_partial (struct target_ops
*ops
,
1439 enum target_object object
,
1440 const char *annex
, gdb_byte
*buf
,
1441 ULONGEST offset
, ULONGEST len
,
1442 ULONGEST
*xfered_len
)
1444 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1448 static enum target_xfer_status
1449 target_write_partial (struct target_ops
*ops
,
1450 enum target_object object
,
1451 const char *annex
, const gdb_byte
*buf
,
1452 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1454 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1458 /* Wrappers to perform the full transfer. */
1460 /* For docs on target_read see target.h. */
1463 target_read (struct target_ops
*ops
,
1464 enum target_object object
,
1465 const char *annex
, gdb_byte
*buf
,
1466 ULONGEST offset
, LONGEST len
)
1468 LONGEST xfered_total
= 0;
1471 /* If we are reading from a memory object, find the length of an addressable
1472 unit for that architecture. */
1473 if (object
== TARGET_OBJECT_MEMORY
1474 || object
== TARGET_OBJECT_STACK_MEMORY
1475 || object
== TARGET_OBJECT_CODE_MEMORY
1476 || object
== TARGET_OBJECT_RAW_MEMORY
)
1477 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1479 while (xfered_total
< len
)
1481 ULONGEST xfered_partial
;
1482 enum target_xfer_status status
;
1484 status
= target_read_partial (ops
, object
, annex
,
1485 buf
+ xfered_total
* unit_size
,
1486 offset
+ xfered_total
, len
- xfered_total
,
1489 /* Call an observer, notifying them of the xfer progress? */
1490 if (status
== TARGET_XFER_EOF
)
1491 return xfered_total
;
1492 else if (status
== TARGET_XFER_OK
)
1494 xfered_total
+= xfered_partial
;
1498 return TARGET_XFER_E_IO
;
1504 /* Assuming that the entire [begin, end) range of memory cannot be
1505 read, try to read whatever subrange is possible to read.
1507 The function returns, in RESULT, either zero or one memory block.
1508 If there's a readable subrange at the beginning, it is completely
1509 read and returned. Any further readable subrange will not be read.
1510 Otherwise, if there's a readable subrange at the end, it will be
1511 completely read and returned. Any readable subranges before it
1512 (obviously, not starting at the beginning), will be ignored. In
1513 other cases -- either no readable subrange, or readable subrange(s)
1514 that is neither at the beginning, or end, nothing is returned.
1516 The purpose of this function is to handle a read across a boundary
1517 of accessible memory in a case when memory map is not available.
1518 The above restrictions are fine for this case, but will give
1519 incorrect results if the memory is 'patchy'. However, supporting
1520 'patchy' memory would require trying to read every single byte,
1521 and it seems unacceptable solution. Explicit memory map is
1522 recommended for this case -- and target_read_memory_robust will
1523 take care of reading multiple ranges then. */
1526 read_whatever_is_readable (struct target_ops
*ops
,
1527 const ULONGEST begin
, const ULONGEST end
,
1529 std::vector
<memory_read_result
> *result
)
1531 ULONGEST current_begin
= begin
;
1532 ULONGEST current_end
= end
;
1534 ULONGEST xfered_len
;
1536 /* If we previously failed to read 1 byte, nothing can be done here. */
1537 if (end
- begin
<= 1)
1540 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1542 /* Check that either first or the last byte is readable, and give up
1543 if not. This heuristic is meant to permit reading accessible memory
1544 at the boundary of accessible region. */
1545 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1546 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1551 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1552 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1553 &xfered_len
) == TARGET_XFER_OK
)
1561 /* Loop invariant is that the [current_begin, current_end) was previously
1562 found to be not readable as a whole.
1564 Note loop condition -- if the range has 1 byte, we can't divide the range
1565 so there's no point trying further. */
1566 while (current_end
- current_begin
> 1)
1568 ULONGEST first_half_begin
, first_half_end
;
1569 ULONGEST second_half_begin
, second_half_end
;
1571 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1575 first_half_begin
= current_begin
;
1576 first_half_end
= middle
;
1577 second_half_begin
= middle
;
1578 second_half_end
= current_end
;
1582 first_half_begin
= middle
;
1583 first_half_end
= current_end
;
1584 second_half_begin
= current_begin
;
1585 second_half_end
= middle
;
1588 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1589 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1591 first_half_end
- first_half_begin
);
1593 if (xfer
== first_half_end
- first_half_begin
)
1595 /* This half reads up fine. So, the error must be in the
1597 current_begin
= second_half_begin
;
1598 current_end
= second_half_end
;
1602 /* This half is not readable. Because we've tried one byte, we
1603 know some part of this half if actually readable. Go to the next
1604 iteration to divide again and try to read.
1606 We don't handle the other half, because this function only tries
1607 to read a single readable subrange. */
1608 current_begin
= first_half_begin
;
1609 current_end
= first_half_end
;
1615 /* The [begin, current_begin) range has been read. */
1616 result
->emplace_back (begin
, current_end
, std::move (buf
));
1620 /* The [current_end, end) range has been read. */
1621 LONGEST region_len
= end
- current_end
;
1623 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1624 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1625 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1626 region_len
* unit_size
);
1627 result
->emplace_back (current_end
, end
, std::move (data
));
1631 std::vector
<memory_read_result
>
1632 read_memory_robust (struct target_ops
*ops
,
1633 const ULONGEST offset
, const LONGEST len
)
1635 std::vector
<memory_read_result
> result
;
1636 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1638 LONGEST xfered_total
= 0;
1639 while (xfered_total
< len
)
1641 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1644 /* If there is no explicit region, a fake one should be created. */
1645 gdb_assert (region
);
1647 if (region
->hi
== 0)
1648 region_len
= len
- xfered_total
;
1650 region_len
= region
->hi
- offset
;
1652 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1654 /* Cannot read this region. Note that we can end up here only
1655 if the region is explicitly marked inaccessible, or
1656 'inaccessible-by-default' is in effect. */
1657 xfered_total
+= region_len
;
1661 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1662 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1663 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1665 LONGEST xfered_partial
=
1666 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1667 offset
+ xfered_total
, to_read
);
1668 /* Call an observer, notifying them of the xfer progress? */
1669 if (xfered_partial
<= 0)
1671 /* Got an error reading full chunk. See if maybe we can read
1673 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1674 offset
+ xfered_total
+ to_read
,
1675 unit_size
, &result
);
1676 xfered_total
+= to_read
;
1680 result
.emplace_back (offset
+ xfered_total
,
1681 offset
+ xfered_total
+ xfered_partial
,
1682 std::move (buffer
));
1683 xfered_total
+= xfered_partial
;
1693 /* An alternative to target_write with progress callbacks. */
1696 target_write_with_progress (struct target_ops
*ops
,
1697 enum target_object object
,
1698 const char *annex
, const gdb_byte
*buf
,
1699 ULONGEST offset
, LONGEST len
,
1700 void (*progress
) (ULONGEST
, void *), void *baton
)
1702 LONGEST xfered_total
= 0;
1705 /* If we are writing to a memory object, find the length of an addressable
1706 unit for that architecture. */
1707 if (object
== TARGET_OBJECT_MEMORY
1708 || object
== TARGET_OBJECT_STACK_MEMORY
1709 || object
== TARGET_OBJECT_CODE_MEMORY
1710 || object
== TARGET_OBJECT_RAW_MEMORY
)
1711 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1713 /* Give the progress callback a chance to set up. */
1715 (*progress
) (0, baton
);
1717 while (xfered_total
< len
)
1719 ULONGEST xfered_partial
;
1720 enum target_xfer_status status
;
1722 status
= target_write_partial (ops
, object
, annex
,
1723 buf
+ xfered_total
* unit_size
,
1724 offset
+ xfered_total
, len
- xfered_total
,
1727 if (status
!= TARGET_XFER_OK
)
1728 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1731 (*progress
) (xfered_partial
, baton
);
1733 xfered_total
+= xfered_partial
;
1739 /* For docs on target_write see target.h. */
1742 target_write (struct target_ops
*ops
,
1743 enum target_object object
,
1744 const char *annex
, const gdb_byte
*buf
,
1745 ULONGEST offset
, LONGEST len
)
1747 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1751 /* Help for target_read_alloc and target_read_stralloc. See their comments
1754 template <typename T
>
1755 gdb::optional
<gdb::def_vector
<T
>>
1756 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1759 gdb::def_vector
<T
> buf
;
1761 const int chunk
= 4096;
1763 /* This function does not have a length parameter; it reads the
1764 entire OBJECT). Also, it doesn't support objects fetched partly
1765 from one target and partly from another (in a different stratum,
1766 e.g. a core file and an executable). Both reasons make it
1767 unsuitable for reading memory. */
1768 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1770 /* Start by reading up to 4K at a time. The target will throttle
1771 this number down if necessary. */
1774 ULONGEST xfered_len
;
1775 enum target_xfer_status status
;
1777 buf
.resize (buf_pos
+ chunk
);
1779 status
= target_read_partial (ops
, object
, annex
,
1780 (gdb_byte
*) &buf
[buf_pos
],
1784 if (status
== TARGET_XFER_EOF
)
1786 /* Read all there was. */
1787 buf
.resize (buf_pos
);
1790 else if (status
!= TARGET_XFER_OK
)
1792 /* An error occurred. */
1796 buf_pos
+= xfered_len
;
1804 gdb::optional
<gdb::byte_vector
>
1805 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1808 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1813 gdb::optional
<gdb::char_vector
>
1814 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1817 gdb::optional
<gdb::char_vector
> buf
1818 = target_read_alloc_1
<char> (ops
, object
, annex
);
1823 if (buf
->empty () || buf
->back () != '\0')
1824 buf
->push_back ('\0');
1826 /* Check for embedded NUL bytes; but allow trailing NULs. */
1827 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1828 it
!= buf
->end (); it
++)
1831 warning (_("target object %d, annex %s, "
1832 "contained unexpected null characters"),
1833 (int) object
, annex
? annex
: "(none)");
1840 /* Memory transfer methods. */
1843 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1846 /* This method is used to read from an alternate, non-current
1847 target. This read must bypass the overlay support (as symbols
1848 don't match this target), and GDB's internal cache (wrong cache
1849 for this target). */
1850 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1852 memory_error (TARGET_XFER_E_IO
, addr
);
1856 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1857 int len
, enum bfd_endian byte_order
)
1859 gdb_byte buf
[sizeof (ULONGEST
)];
1861 gdb_assert (len
<= sizeof (buf
));
1862 get_target_memory (ops
, addr
, buf
, len
);
1863 return extract_unsigned_integer (buf
, len
, byte_order
);
1869 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1870 struct bp_target_info
*bp_tgt
)
1872 if (!may_insert_breakpoints
)
1874 warning (_("May not insert breakpoints"));
1878 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1884 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1885 struct bp_target_info
*bp_tgt
,
1886 enum remove_bp_reason reason
)
1888 /* This is kind of a weird case to handle, but the permission might
1889 have been changed after breakpoints were inserted - in which case
1890 we should just take the user literally and assume that any
1891 breakpoints should be left in place. */
1892 if (!may_insert_breakpoints
)
1894 warning (_("May not remove breakpoints"));
1898 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1902 info_target_command (const char *args
, int from_tty
)
1904 int has_all_mem
= 0;
1906 if (symfile_objfile
!= NULL
)
1907 printf_unfiltered (_("Symbols from \"%s\".\n"),
1908 objfile_name (symfile_objfile
));
1910 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1912 if (!t
->has_memory ())
1915 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1918 printf_unfiltered (_("\tWhile running this, "
1919 "GDB does not access memory from...\n"));
1920 printf_unfiltered ("%s:\n", t
->longname ());
1922 has_all_mem
= t
->has_all_memory ();
1926 /* This function is called before any new inferior is created, e.g.
1927 by running a program, attaching, or connecting to a target.
1928 It cleans up any state from previous invocations which might
1929 change between runs. This is a subset of what target_preopen
1930 resets (things which might change between targets). */
1933 target_pre_inferior (int from_tty
)
1935 /* Clear out solib state. Otherwise the solib state of the previous
1936 inferior might have survived and is entirely wrong for the new
1937 target. This has been observed on GNU/Linux using glibc 2.3. How
1949 Cannot access memory at address 0xdeadbeef
1952 /* In some OSs, the shared library list is the same/global/shared
1953 across inferiors. If code is shared between processes, so are
1954 memory regions and features. */
1955 if (!gdbarch_has_global_solist (target_gdbarch ()))
1957 no_shared_libraries (NULL
, from_tty
);
1959 invalidate_target_mem_regions ();
1961 target_clear_description ();
1964 /* attach_flag may be set if the previous process associated with
1965 the inferior was attached to. */
1966 current_inferior ()->attach_flag
= 0;
1968 current_inferior ()->highest_thread_num
= 0;
1970 agent_capability_invalidate ();
1973 /* This is to be called by the open routine before it does
1977 target_preopen (int from_tty
)
1981 if (current_inferior ()->pid
!= 0)
1984 || !target_has_execution
1985 || query (_("A program is being debugged already. Kill it? ")))
1987 /* Core inferiors actually should be detached, not
1989 if (target_has_execution
)
1992 target_detach (current_inferior (), 0);
1995 error (_("Program not killed."));
1998 /* Calling target_kill may remove the target from the stack. But if
1999 it doesn't (which seems like a win for UDI), remove it now. */
2000 /* Leave the exec target, though. The user may be switching from a
2001 live process to a core of the same program. */
2002 pop_all_targets_above (file_stratum
);
2004 target_pre_inferior (from_tty
);
2010 target_detach (inferior
*inf
, int from_tty
)
2012 /* After we have detached, we will clear the register cache for this inferior
2013 by calling registers_changed_ptid. We must save the pid_ptid before
2014 detaching, as the target detach method will clear inf->pid. */
2015 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2017 /* As long as some to_detach implementations rely on the current_inferior
2018 (either directly, or indirectly, like through target_gdbarch or by
2019 reading memory), INF needs to be the current inferior. When that
2020 requirement will become no longer true, then we can remove this
2022 gdb_assert (inf
== current_inferior ());
2024 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2025 /* Don't remove global breakpoints here. They're removed on
2026 disconnection from the target. */
2029 /* If we're in breakpoints-always-inserted mode, have to remove
2030 breakpoints before detaching. */
2031 remove_breakpoints_inf (current_inferior ());
2033 prepare_for_detach ();
2035 /* Hold a strong reference because detaching may unpush the
2037 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2039 current_top_target ()->detach (inf
, from_tty
);
2041 process_stratum_target
*proc_target
2042 = as_process_stratum_target (proc_target_ref
.get ());
2044 registers_changed_ptid (proc_target
, save_pid_ptid
);
2046 /* We have to ensure we have no frame cache left. Normally,
2047 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2048 inferior_ptid matches save_pid_ptid, but in our case, it does not
2049 call it, as inferior_ptid has been reset. */
2050 reinit_frame_cache ();
2054 target_disconnect (const char *args
, int from_tty
)
2056 /* If we're in breakpoints-always-inserted mode or if breakpoints
2057 are global across processes, we have to remove them before
2059 remove_breakpoints ();
2061 current_top_target ()->disconnect (args
, from_tty
);
2064 /* See target/target.h. */
2067 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2069 return current_top_target ()->wait (ptid
, status
, options
);
2075 default_target_wait (struct target_ops
*ops
,
2076 ptid_t ptid
, struct target_waitstatus
*status
,
2079 status
->kind
= TARGET_WAITKIND_IGNORE
;
2080 return minus_one_ptid
;
2084 target_pid_to_str (ptid_t ptid
)
2086 return current_top_target ()->pid_to_str (ptid
);
2090 target_thread_name (struct thread_info
*info
)
2092 gdb_assert (info
->inf
== current_inferior ());
2094 return current_top_target ()->thread_name (info
);
2097 struct thread_info
*
2098 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2100 struct inferior
*inf
)
2102 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2109 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2111 return current_top_target ()->thread_info_to_thread_handle (tip
);
2115 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2117 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2119 target_dcache_invalidate ();
2121 current_top_target ()->resume (ptid
, step
, signal
);
2123 registers_changed_ptid (curr_target
, ptid
);
2124 /* We only set the internal executing state here. The user/frontend
2125 running state is set at a higher level. This also clears the
2126 thread's stop_pc as side effect. */
2127 set_executing (curr_target
, ptid
, true);
2128 clear_inline_frame_state (curr_target
, ptid
);
2131 /* If true, target_commit_resume is a nop. */
2132 static int defer_target_commit_resume
;
2137 target_commit_resume (void)
2139 if (defer_target_commit_resume
)
2142 current_top_target ()->commit_resume ();
2147 scoped_restore_tmpl
<int>
2148 make_scoped_defer_target_commit_resume ()
2150 return make_scoped_restore (&defer_target_commit_resume
, 1);
2154 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2156 current_top_target ()->pass_signals (pass_signals
);
2160 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2162 current_top_target ()->program_signals (program_signals
);
2166 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2169 /* Some target returned a fork event, but did not know how to follow it. */
2170 internal_error (__FILE__
, __LINE__
,
2171 _("could not find a target to follow fork"));
2174 /* Look through the list of possible targets for a target that can
2178 target_follow_fork (bool follow_child
, bool detach_fork
)
2180 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2183 /* Target wrapper for follow exec hook. */
2186 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2188 current_top_target ()->follow_exec (inf
, execd_pathname
);
2192 default_mourn_inferior (struct target_ops
*self
)
2194 internal_error (__FILE__
, __LINE__
,
2195 _("could not find a target to follow mourn inferior"));
2199 target_mourn_inferior (ptid_t ptid
)
2201 gdb_assert (ptid
== inferior_ptid
);
2202 current_top_target ()->mourn_inferior ();
2204 /* We no longer need to keep handles on any of the object files.
2205 Make sure to release them to avoid unnecessarily locking any
2206 of them while we're not actually debugging. */
2207 bfd_cache_close_all ();
2210 /* Look for a target which can describe architectural features, starting
2211 from TARGET. If we find one, return its description. */
2213 const struct target_desc
*
2214 target_read_description (struct target_ops
*target
)
2216 return target
->read_description ();
2219 /* This implements a basic search of memory, reading target memory and
2220 performing the search here (as opposed to performing the search in on the
2221 target side with, for example, gdbserver). */
2224 simple_search_memory (struct target_ops
*ops
,
2225 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2226 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2227 CORE_ADDR
*found_addrp
)
2229 /* NOTE: also defined in find.c testcase. */
2230 #define SEARCH_CHUNK_SIZE 16000
2231 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2232 /* Buffer to hold memory contents for searching. */
2233 unsigned search_buf_size
;
2235 search_buf_size
= chunk_size
+ pattern_len
- 1;
2237 /* No point in trying to allocate a buffer larger than the search space. */
2238 if (search_space_len
< search_buf_size
)
2239 search_buf_size
= search_space_len
;
2241 gdb::byte_vector
search_buf (search_buf_size
);
2243 /* Prime the search buffer. */
2245 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2246 search_buf
.data (), start_addr
, search_buf_size
)
2249 warning (_("Unable to access %s bytes of target "
2250 "memory at %s, halting search."),
2251 pulongest (search_buf_size
), hex_string (start_addr
));
2255 /* Perform the search.
2257 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2258 When we've scanned N bytes we copy the trailing bytes to the start and
2259 read in another N bytes. */
2261 while (search_space_len
>= pattern_len
)
2263 gdb_byte
*found_ptr
;
2264 unsigned nr_search_bytes
2265 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2267 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2268 pattern
, pattern_len
);
2270 if (found_ptr
!= NULL
)
2272 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2274 *found_addrp
= found_addr
;
2278 /* Not found in this chunk, skip to next chunk. */
2280 /* Don't let search_space_len wrap here, it's unsigned. */
2281 if (search_space_len
>= chunk_size
)
2282 search_space_len
-= chunk_size
;
2284 search_space_len
= 0;
2286 if (search_space_len
>= pattern_len
)
2288 unsigned keep_len
= search_buf_size
- chunk_size
;
2289 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2292 /* Copy the trailing part of the previous iteration to the front
2293 of the buffer for the next iteration. */
2294 gdb_assert (keep_len
== pattern_len
- 1);
2295 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2297 nr_to_read
= std::min (search_space_len
- keep_len
,
2298 (ULONGEST
) chunk_size
);
2300 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2301 &search_buf
[keep_len
], read_addr
,
2302 nr_to_read
) != nr_to_read
)
2304 warning (_("Unable to access %s bytes of target "
2305 "memory at %s, halting search."),
2306 plongest (nr_to_read
),
2307 hex_string (read_addr
));
2311 start_addr
+= chunk_size
;
2320 /* Default implementation of memory-searching. */
2323 default_search_memory (struct target_ops
*self
,
2324 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2325 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2326 CORE_ADDR
*found_addrp
)
2328 /* Start over from the top of the target stack. */
2329 return simple_search_memory (current_top_target (),
2330 start_addr
, search_space_len
,
2331 pattern
, pattern_len
, found_addrp
);
2334 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2335 sequence of bytes in PATTERN with length PATTERN_LEN.
2337 The result is 1 if found, 0 if not found, and -1 if there was an error
2338 requiring halting of the search (e.g. memory read error).
2339 If the pattern is found the address is recorded in FOUND_ADDRP. */
2342 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2343 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2344 CORE_ADDR
*found_addrp
)
2346 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2347 pattern
, pattern_len
, found_addrp
);
2350 /* Look through the currently pushed targets. If none of them will
2351 be able to restart the currently running process, issue an error
2355 target_require_runnable (void)
2357 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2359 /* If this target knows how to create a new program, then
2360 assume we will still be able to after killing the current
2361 one. Either killing and mourning will not pop T, or else
2362 find_default_run_target will find it again. */
2363 if (t
->can_create_inferior ())
2366 /* Do not worry about targets at certain strata that can not
2367 create inferiors. Assume they will be pushed again if
2368 necessary, and continue to the process_stratum. */
2369 if (t
->stratum () > process_stratum
)
2372 error (_("The \"%s\" target does not support \"run\". "
2373 "Try \"help target\" or \"continue\"."),
2377 /* This function is only called if the target is running. In that
2378 case there should have been a process_stratum target and it
2379 should either know how to create inferiors, or not... */
2380 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2383 /* Whether GDB is allowed to fall back to the default run target for
2384 "run", "attach", etc. when no target is connected yet. */
2385 static bool auto_connect_native_target
= true;
2388 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2389 struct cmd_list_element
*c
, const char *value
)
2391 fprintf_filtered (file
,
2392 _("Whether GDB may automatically connect to the "
2393 "native target is %s.\n"),
2397 /* A pointer to the target that can respond to "run" or "attach".
2398 Native targets are always singletons and instantiated early at GDB
2400 static target_ops
*the_native_target
;
2405 set_native_target (target_ops
*target
)
2407 if (the_native_target
!= NULL
)
2408 internal_error (__FILE__
, __LINE__
,
2409 _("native target already set (\"%s\")."),
2410 the_native_target
->longname ());
2412 the_native_target
= target
;
2418 get_native_target ()
2420 return the_native_target
;
2423 /* Look through the list of possible targets for a target that can
2424 execute a run or attach command without any other data. This is
2425 used to locate the default process stratum.
2427 If DO_MESG is not NULL, the result is always valid (error() is
2428 called for errors); else, return NULL on error. */
2430 static struct target_ops
*
2431 find_default_run_target (const char *do_mesg
)
2433 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2434 return the_native_target
;
2436 if (do_mesg
!= NULL
)
2437 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2444 find_attach_target (void)
2446 /* If a target on the current stack can attach, use it. */
2447 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2449 if (t
->can_attach ())
2453 /* Otherwise, use the default run target for attaching. */
2454 return find_default_run_target ("attach");
2460 find_run_target (void)
2462 /* If a target on the current stack can run, use it. */
2463 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2465 if (t
->can_create_inferior ())
2469 /* Otherwise, use the default run target. */
2470 return find_default_run_target ("run");
2474 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2479 /* Implement the "info proc" command. */
2482 target_info_proc (const char *args
, enum info_proc_what what
)
2484 struct target_ops
*t
;
2486 /* If we're already connected to something that can get us OS
2487 related data, use it. Otherwise, try using the native
2489 t
= find_target_at (process_stratum
);
2491 t
= find_default_run_target (NULL
);
2493 for (; t
!= NULL
; t
= t
->beneath ())
2495 if (t
->info_proc (args
, what
))
2498 fprintf_unfiltered (gdb_stdlog
,
2499 "target_info_proc (\"%s\", %d)\n", args
, what
);
2509 find_default_supports_disable_randomization (struct target_ops
*self
)
2511 struct target_ops
*t
;
2513 t
= find_default_run_target (NULL
);
2515 return t
->supports_disable_randomization ();
2520 target_supports_disable_randomization (void)
2522 return current_top_target ()->supports_disable_randomization ();
2525 /* See target/target.h. */
2528 target_supports_multi_process (void)
2530 return current_top_target ()->supports_multi_process ();
2535 gdb::optional
<gdb::char_vector
>
2536 target_get_osdata (const char *type
)
2538 struct target_ops
*t
;
2540 /* If we're already connected to something that can get us OS
2541 related data, use it. Otherwise, try using the native
2543 t
= find_target_at (process_stratum
);
2545 t
= find_default_run_target ("get OS data");
2550 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2553 /* Determine the current address space of thread PTID. */
2555 struct address_space
*
2556 target_thread_address_space (ptid_t ptid
)
2558 struct address_space
*aspace
;
2560 aspace
= current_top_target ()->thread_address_space (ptid
);
2561 gdb_assert (aspace
!= NULL
);
2569 target_ops::beneath () const
2571 return current_inferior ()->find_target_beneath (this);
2575 target_ops::close ()
2580 target_ops::can_attach ()
2586 target_ops::attach (const char *, int)
2588 gdb_assert_not_reached ("target_ops::attach called");
2592 target_ops::can_create_inferior ()
2598 target_ops::create_inferior (const char *, const std::string
&,
2601 gdb_assert_not_reached ("target_ops::create_inferior called");
2605 target_ops::can_run ()
2613 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2622 /* Target file operations. */
2624 static struct target_ops
*
2625 default_fileio_target (void)
2627 struct target_ops
*t
;
2629 /* If we're already connected to something that can perform
2630 file I/O, use it. Otherwise, try using the native target. */
2631 t
= find_target_at (process_stratum
);
2634 return find_default_run_target ("file I/O");
2637 /* File handle for target file operations. */
2641 /* The target on which this file is open. NULL if the target is
2642 meanwhile closed while the handle is open. */
2645 /* The file descriptor on the target. */
2648 /* Check whether this fileio_fh_t represents a closed file. */
2651 return target_fd
< 0;
2655 /* Vector of currently open file handles. The value returned by
2656 target_fileio_open and passed as the FD argument to other
2657 target_fileio_* functions is an index into this vector. This
2658 vector's entries are never freed; instead, files are marked as
2659 closed, and the handle becomes available for reuse. */
2660 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2662 /* Index into fileio_fhandles of the lowest handle that might be
2663 closed. This permits handle reuse without searching the whole
2664 list each time a new file is opened. */
2665 static int lowest_closed_fd
;
2667 /* Invalidate the target associated with open handles that were open
2668 on target TARG, since we're about to close (and maybe destroy) the
2669 target. The handles remain open from the client's perspective, but
2670 trying to do anything with them other than closing them will fail
2674 fileio_handles_invalidate_target (target_ops
*targ
)
2676 for (fileio_fh_t
&fh
: fileio_fhandles
)
2677 if (fh
.target
== targ
)
2681 /* Acquire a target fileio file descriptor. */
2684 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2686 /* Search for closed handles to reuse. */
2687 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2689 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2691 if (fh
.is_closed ())
2695 /* Push a new handle if no closed handles were found. */
2696 if (lowest_closed_fd
== fileio_fhandles
.size ())
2697 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2699 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2701 /* Should no longer be marked closed. */
2702 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2704 /* Return its index, and start the next lookup at
2706 return lowest_closed_fd
++;
2709 /* Release a target fileio file descriptor. */
2712 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2715 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2718 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2720 static fileio_fh_t
*
2721 fileio_fd_to_fh (int fd
)
2723 return &fileio_fhandles
[fd
];
2727 /* Default implementations of file i/o methods. We don't want these
2728 to delegate automatically, because we need to know which target
2729 supported the method, in order to call it directly from within
2730 pread/pwrite, etc. */
2733 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2734 int flags
, int mode
, int warn_if_slow
,
2737 *target_errno
= FILEIO_ENOSYS
;
2742 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2743 ULONGEST offset
, int *target_errno
)
2745 *target_errno
= FILEIO_ENOSYS
;
2750 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2751 ULONGEST offset
, int *target_errno
)
2753 *target_errno
= FILEIO_ENOSYS
;
2758 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2760 *target_errno
= FILEIO_ENOSYS
;
2765 target_ops::fileio_close (int fd
, int *target_errno
)
2767 *target_errno
= FILEIO_ENOSYS
;
2772 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2775 *target_errno
= FILEIO_ENOSYS
;
2779 gdb::optional
<std::string
>
2780 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2783 *target_errno
= FILEIO_ENOSYS
;
2787 /* Helper for target_fileio_open and
2788 target_fileio_open_warn_if_slow. */
2791 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2792 int flags
, int mode
, int warn_if_slow
,
2795 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2797 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2798 warn_if_slow
, target_errno
);
2800 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2806 fd
= acquire_fileio_fd (t
, fd
);
2809 fprintf_unfiltered (gdb_stdlog
,
2810 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2812 inf
== NULL
? 0 : inf
->num
,
2813 filename
, flags
, mode
,
2815 fd
!= -1 ? 0 : *target_errno
);
2819 *target_errno
= FILEIO_ENOSYS
;
2826 target_fileio_open (struct inferior
*inf
, const char *filename
,
2827 int flags
, int mode
, int *target_errno
)
2829 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2836 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2837 const char *filename
,
2838 int flags
, int mode
, int *target_errno
)
2840 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2847 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2848 ULONGEST offset
, int *target_errno
)
2850 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2853 if (fh
->is_closed ())
2854 *target_errno
= EBADF
;
2855 else if (fh
->target
== NULL
)
2856 *target_errno
= EIO
;
2858 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2859 len
, offset
, target_errno
);
2862 fprintf_unfiltered (gdb_stdlog
,
2863 "target_fileio_pwrite (%d,...,%d,%s) "
2865 fd
, len
, pulongest (offset
),
2866 ret
, ret
!= -1 ? 0 : *target_errno
);
2873 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2874 ULONGEST offset
, int *target_errno
)
2876 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2879 if (fh
->is_closed ())
2880 *target_errno
= EBADF
;
2881 else if (fh
->target
== NULL
)
2882 *target_errno
= EIO
;
2884 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2885 len
, offset
, target_errno
);
2888 fprintf_unfiltered (gdb_stdlog
,
2889 "target_fileio_pread (%d,...,%d,%s) "
2891 fd
, len
, pulongest (offset
),
2892 ret
, ret
!= -1 ? 0 : *target_errno
);
2899 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2901 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2904 if (fh
->is_closed ())
2905 *target_errno
= EBADF
;
2906 else if (fh
->target
== NULL
)
2907 *target_errno
= EIO
;
2909 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2912 fprintf_unfiltered (gdb_stdlog
,
2913 "target_fileio_fstat (%d) = %d (%d)\n",
2914 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2921 target_fileio_close (int fd
, int *target_errno
)
2923 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2926 if (fh
->is_closed ())
2927 *target_errno
= EBADF
;
2930 if (fh
->target
!= NULL
)
2931 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2935 release_fileio_fd (fd
, fh
);
2939 fprintf_unfiltered (gdb_stdlog
,
2940 "target_fileio_close (%d) = %d (%d)\n",
2941 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2948 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2951 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2953 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2955 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2959 fprintf_unfiltered (gdb_stdlog
,
2960 "target_fileio_unlink (%d,%s)"
2962 inf
== NULL
? 0 : inf
->num
, filename
,
2963 ret
, ret
!= -1 ? 0 : *target_errno
);
2967 *target_errno
= FILEIO_ENOSYS
;
2973 gdb::optional
<std::string
>
2974 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2977 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2979 gdb::optional
<std::string
> ret
2980 = t
->fileio_readlink (inf
, filename
, target_errno
);
2982 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2986 fprintf_unfiltered (gdb_stdlog
,
2987 "target_fileio_readlink (%d,%s)"
2989 inf
== NULL
? 0 : inf
->num
,
2990 filename
, ret
? ret
->c_str () : "(nil)",
2991 ret
? 0 : *target_errno
);
2995 *target_errno
= FILEIO_ENOSYS
;
2999 /* Like scoped_fd, but specific to target fileio. */
3001 class scoped_target_fd
3004 explicit scoped_target_fd (int fd
) noexcept
3009 ~scoped_target_fd ()
3015 target_fileio_close (m_fd
, &target_errno
);
3019 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3021 int get () const noexcept
3030 /* Read target file FILENAME, in the filesystem as seen by INF. If
3031 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3032 remote targets, the remote stub). Store the result in *BUF_P and
3033 return the size of the transferred data. PADDING additional bytes
3034 are available in *BUF_P. This is a helper function for
3035 target_fileio_read_alloc; see the declaration of that function for
3036 more information. */
3039 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3040 gdb_byte
**buf_p
, int padding
)
3042 size_t buf_alloc
, buf_pos
;
3047 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3048 0700, &target_errno
));
3049 if (fd
.get () == -1)
3052 /* Start by reading up to 4K at a time. The target will throttle
3053 this number down if necessary. */
3055 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3059 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3060 buf_alloc
- buf_pos
- padding
, buf_pos
,
3064 /* An error occurred. */
3070 /* Read all there was. */
3080 /* If the buffer is filling up, expand it. */
3081 if (buf_alloc
< buf_pos
* 2)
3084 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3094 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3097 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3102 gdb::unique_xmalloc_ptr
<char>
3103 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3107 LONGEST i
, transferred
;
3109 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3110 bufstr
= (char *) buffer
;
3112 if (transferred
< 0)
3113 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3115 if (transferred
== 0)
3116 return make_unique_xstrdup ("");
3118 bufstr
[transferred
] = 0;
3120 /* Check for embedded NUL bytes; but allow trailing NULs. */
3121 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3124 warning (_("target file %s "
3125 "contained unexpected null characters"),
3130 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3135 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3136 CORE_ADDR addr
, int len
)
3138 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3142 default_watchpoint_addr_within_range (struct target_ops
*target
,
3144 CORE_ADDR start
, int length
)
3146 return addr
>= start
&& addr
< start
+ length
;
3152 target_stack::find_beneath (const target_ops
*t
) const
3154 /* Look for a non-empty slot at stratum levels beneath T's. */
3155 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3156 if (m_stack
[stratum
] != NULL
)
3157 return m_stack
[stratum
];
3165 find_target_at (enum strata stratum
)
3167 return current_inferior ()->target_at (stratum
);
3175 target_announce_detach (int from_tty
)
3178 const char *exec_file
;
3183 exec_file
= get_exec_file (0);
3184 if (exec_file
== NULL
)
3187 pid
= inferior_ptid
.pid ();
3188 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3189 target_pid_to_str (ptid_t (pid
)).c_str ());
3192 /* The inferior process has died. Long live the inferior! */
3195 generic_mourn_inferior (void)
3197 inferior
*inf
= current_inferior ();
3199 inferior_ptid
= null_ptid
;
3201 /* Mark breakpoints uninserted in case something tries to delete a
3202 breakpoint while we delete the inferior's threads (which would
3203 fail, since the inferior is long gone). */
3204 mark_breakpoints_out ();
3207 exit_inferior (inf
);
3209 /* Note this wipes step-resume breakpoints, so needs to be done
3210 after exit_inferior, which ends up referencing the step-resume
3211 breakpoints through clear_thread_inferior_resources. */
3212 breakpoint_init_inferior (inf_exited
);
3214 registers_changed ();
3216 reopen_exec_file ();
3217 reinit_frame_cache ();
3219 if (deprecated_detach_hook
)
3220 deprecated_detach_hook ();
3223 /* Convert a normal process ID to a string. Returns the string in a
3227 normal_pid_to_str (ptid_t ptid
)
3229 return string_printf ("process %d", ptid
.pid ());
3233 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3235 return normal_pid_to_str (ptid
);
3238 /* Error-catcher for target_find_memory_regions. */
3240 dummy_find_memory_regions (struct target_ops
*self
,
3241 find_memory_region_ftype ignore1
, void *ignore2
)
3243 error (_("Command not implemented for this target."));
3247 /* Error-catcher for target_make_corefile_notes. */
3249 dummy_make_corefile_notes (struct target_ops
*self
,
3250 bfd
*ignore1
, int *ignore2
)
3252 error (_("Command not implemented for this target."));
3256 #include "target-delegates.c"
3258 /* The initial current target, so that there is always a semi-valid
3261 static dummy_target the_dummy_target
;
3268 return &the_dummy_target
;
3271 static const target_info dummy_target_info
= {
3278 dummy_target::stratum () const
3280 return dummy_stratum
;
3284 debug_target::stratum () const
3286 return debug_stratum
;
3290 dummy_target::info () const
3292 return dummy_target_info
;
3296 debug_target::info () const
3298 return beneath ()->info ();
3304 target_close (struct target_ops
*targ
)
3306 gdb_assert (!target_is_pushed (targ
));
3308 fileio_handles_invalidate_target (targ
);
3313 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3317 target_thread_alive (ptid_t ptid
)
3319 return current_top_target ()->thread_alive (ptid
);
3323 target_update_thread_list (void)
3325 current_top_target ()->update_thread_list ();
3329 target_stop (ptid_t ptid
)
3333 warning (_("May not interrupt or stop the target, ignoring attempt"));
3337 current_top_target ()->stop (ptid
);
3345 warning (_("May not interrupt or stop the target, ignoring attempt"));
3349 current_top_target ()->interrupt ();
3355 target_pass_ctrlc (void)
3357 /* Pass the Ctrl-C to the first target that has a thread
3359 for (inferior
*inf
: all_inferiors ())
3361 target_ops
*proc_target
= inf
->process_target ();
3362 if (proc_target
== NULL
)
3365 for (thread_info
*thr
: inf
->threads ())
3367 /* A thread can be THREAD_STOPPED and executing, while
3368 running an infcall. */
3369 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3371 /* We can get here quite deep in target layers. Avoid
3372 switching thread context or anything that would
3373 communicate with the target (e.g., to fetch
3374 registers), or flushing e.g., the frame cache. We
3375 just switch inferior in order to be able to call
3376 through the target_stack. */
3377 scoped_restore_current_inferior restore_inferior
;
3378 set_current_inferior (inf
);
3379 current_top_target ()->pass_ctrlc ();
3389 default_target_pass_ctrlc (struct target_ops
*ops
)
3391 target_interrupt ();
3394 /* See target/target.h. */
3397 target_stop_and_wait (ptid_t ptid
)
3399 struct target_waitstatus status
;
3400 bool was_non_stop
= non_stop
;
3405 memset (&status
, 0, sizeof (status
));
3406 target_wait (ptid
, &status
, 0);
3408 non_stop
= was_non_stop
;
3411 /* See target/target.h. */
3414 target_continue_no_signal (ptid_t ptid
)
3416 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3419 /* See target/target.h. */
3422 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3424 target_resume (ptid
, 0, signal
);
3427 /* Concatenate ELEM to LIST, a comma-separated list. */
3430 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3432 if (!list
->empty ())
3433 list
->append (", ");
3435 list
->append (elem
);
3438 /* Helper for target_options_to_string. If OPT is present in
3439 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3440 OPT is removed from TARGET_OPTIONS. */
3443 do_option (int *target_options
, std::string
*ret
,
3444 int opt
, const char *opt_str
)
3446 if ((*target_options
& opt
) != 0)
3448 str_comma_list_concat_elem (ret
, opt_str
);
3449 *target_options
&= ~opt
;
3456 target_options_to_string (int target_options
)
3460 #define DO_TARG_OPTION(OPT) \
3461 do_option (&target_options, &ret, OPT, #OPT)
3463 DO_TARG_OPTION (TARGET_WNOHANG
);
3465 if (target_options
!= 0)
3466 str_comma_list_concat_elem (&ret
, "unknown???");
3472 target_fetch_registers (struct regcache
*regcache
, int regno
)
3474 current_top_target ()->fetch_registers (regcache
, regno
);
3476 regcache
->debug_print_register ("target_fetch_registers", regno
);
3480 target_store_registers (struct regcache
*regcache
, int regno
)
3482 if (!may_write_registers
)
3483 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3485 current_top_target ()->store_registers (regcache
, regno
);
3488 regcache
->debug_print_register ("target_store_registers", regno
);
3493 target_core_of_thread (ptid_t ptid
)
3495 return current_top_target ()->core_of_thread (ptid
);
3499 simple_verify_memory (struct target_ops
*ops
,
3500 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3502 LONGEST total_xfered
= 0;
3504 while (total_xfered
< size
)
3506 ULONGEST xfered_len
;
3507 enum target_xfer_status status
;
3509 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3511 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3512 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3514 if (status
== TARGET_XFER_OK
3515 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3517 total_xfered
+= xfered_len
;
3526 /* Default implementation of memory verification. */
3529 default_verify_memory (struct target_ops
*self
,
3530 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3532 /* Start over from the top of the target stack. */
3533 return simple_verify_memory (current_top_target (),
3534 data
, memaddr
, size
);
3538 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3540 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3543 /* The documentation for this function is in its prototype declaration in
3547 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3548 enum target_hw_bp_type rw
)
3550 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3553 /* The documentation for this function is in its prototype declaration in
3557 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3558 enum target_hw_bp_type rw
)
3560 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3563 /* The documentation for this function is in its prototype declaration
3567 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3569 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3572 /* The documentation for this function is in its prototype declaration
3576 target_ranged_break_num_registers (void)
3578 return current_top_target ()->ranged_break_num_registers ();
3583 struct btrace_target_info
*
3584 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3586 return current_top_target ()->enable_btrace (ptid
, conf
);
3592 target_disable_btrace (struct btrace_target_info
*btinfo
)
3594 current_top_target ()->disable_btrace (btinfo
);
3600 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3602 current_top_target ()->teardown_btrace (btinfo
);
3608 target_read_btrace (struct btrace_data
*btrace
,
3609 struct btrace_target_info
*btinfo
,
3610 enum btrace_read_type type
)
3612 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3617 const struct btrace_config
*
3618 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3620 return current_top_target ()->btrace_conf (btinfo
);
3626 target_stop_recording (void)
3628 current_top_target ()->stop_recording ();
3634 target_save_record (const char *filename
)
3636 current_top_target ()->save_record (filename
);
3642 target_supports_delete_record ()
3644 return current_top_target ()->supports_delete_record ();
3650 target_delete_record (void)
3652 current_top_target ()->delete_record ();
3658 target_record_method (ptid_t ptid
)
3660 return current_top_target ()->record_method (ptid
);
3666 target_record_is_replaying (ptid_t ptid
)
3668 return current_top_target ()->record_is_replaying (ptid
);
3674 target_record_will_replay (ptid_t ptid
, int dir
)
3676 return current_top_target ()->record_will_replay (ptid
, dir
);
3682 target_record_stop_replaying (void)
3684 current_top_target ()->record_stop_replaying ();
3690 target_goto_record_begin (void)
3692 current_top_target ()->goto_record_begin ();
3698 target_goto_record_end (void)
3700 current_top_target ()->goto_record_end ();
3706 target_goto_record (ULONGEST insn
)
3708 current_top_target ()->goto_record (insn
);
3714 target_insn_history (int size
, gdb_disassembly_flags flags
)
3716 current_top_target ()->insn_history (size
, flags
);
3722 target_insn_history_from (ULONGEST from
, int size
,
3723 gdb_disassembly_flags flags
)
3725 current_top_target ()->insn_history_from (from
, size
, flags
);
3731 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3732 gdb_disassembly_flags flags
)
3734 current_top_target ()->insn_history_range (begin
, end
, flags
);
3740 target_call_history (int size
, record_print_flags flags
)
3742 current_top_target ()->call_history (size
, flags
);
3748 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3750 current_top_target ()->call_history_from (begin
, size
, flags
);
3756 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3758 current_top_target ()->call_history_range (begin
, end
, flags
);
3763 const struct frame_unwind
*
3764 target_get_unwinder (void)
3766 return current_top_target ()->get_unwinder ();
3771 const struct frame_unwind
*
3772 target_get_tailcall_unwinder (void)
3774 return current_top_target ()->get_tailcall_unwinder ();
3780 target_prepare_to_generate_core (void)
3782 current_top_target ()->prepare_to_generate_core ();
3788 target_done_generating_core (void)
3790 current_top_target ()->done_generating_core ();
3795 static char targ_desc
[] =
3796 "Names of targets and files being debugged.\nShows the entire \
3797 stack of targets currently in use (including the exec-file,\n\
3798 core-file, and process, if any), as well as the symbol file name.";
3801 default_rcmd (struct target_ops
*self
, const char *command
,
3802 struct ui_file
*output
)
3804 error (_("\"monitor\" command not supported by this target."));
3808 do_monitor_command (const char *cmd
, int from_tty
)
3810 target_rcmd (cmd
, gdb_stdtarg
);
3813 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3817 flash_erase_command (const char *cmd
, int from_tty
)
3819 /* Used to communicate termination of flash operations to the target. */
3820 bool found_flash_region
= false;
3821 struct gdbarch
*gdbarch
= target_gdbarch ();
3823 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3825 /* Iterate over all memory regions. */
3826 for (const mem_region
&m
: mem_regions
)
3828 /* Is this a flash memory region? */
3829 if (m
.attrib
.mode
== MEM_FLASH
)
3831 found_flash_region
= true;
3832 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3834 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3836 current_uiout
->message (_("Erasing flash memory region at address "));
3837 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3838 current_uiout
->message (", size = ");
3839 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3840 current_uiout
->message ("\n");
3844 /* Did we do any flash operations? If so, we need to finalize them. */
3845 if (found_flash_region
)
3846 target_flash_done ();
3848 current_uiout
->message (_("No flash memory regions found.\n"));
3851 /* Print the name of each layers of our target stack. */
3854 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3856 printf_filtered (_("The current target stack is:\n"));
3858 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3860 if (t
->stratum () == debug_stratum
)
3862 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3869 target_async (int enable
)
3871 infrun_async (enable
);
3872 current_top_target ()->async (enable
);
3878 target_thread_events (int enable
)
3880 current_top_target ()->thread_events (enable
);
3883 /* Controls if targets can report that they can/are async. This is
3884 just for maintainers to use when debugging gdb. */
3885 bool target_async_permitted
= true;
3887 /* The set command writes to this variable. If the inferior is
3888 executing, target_async_permitted is *not* updated. */
3889 static bool target_async_permitted_1
= true;
3892 maint_set_target_async_command (const char *args
, int from_tty
,
3893 struct cmd_list_element
*c
)
3895 if (have_live_inferiors ())
3897 target_async_permitted_1
= target_async_permitted
;
3898 error (_("Cannot change this setting while the inferior is running."));
3901 target_async_permitted
= target_async_permitted_1
;
3905 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3906 struct cmd_list_element
*c
,
3909 fprintf_filtered (file
,
3910 _("Controlling the inferior in "
3911 "asynchronous mode is %s.\n"), value
);
3914 /* Return true if the target operates in non-stop mode even with "set
3918 target_always_non_stop_p (void)
3920 return current_top_target ()->always_non_stop_p ();
3926 target_is_non_stop_p (void)
3929 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3930 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3931 && target_always_non_stop_p ()));
3937 exists_non_stop_target ()
3939 if (target_is_non_stop_p ())
3942 scoped_restore_current_thread restore_thread
;
3944 for (inferior
*inf
: all_inferiors ())
3946 switch_to_inferior_no_thread (inf
);
3947 if (target_is_non_stop_p ())
3954 /* Controls if targets can report that they always run in non-stop
3955 mode. This is just for maintainers to use when debugging gdb. */
3956 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3958 /* The set command writes to this variable. If the inferior is
3959 executing, target_non_stop_enabled is *not* updated. */
3960 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3962 /* Implementation of "maint set target-non-stop". */
3965 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3966 struct cmd_list_element
*c
)
3968 if (have_live_inferiors ())
3970 target_non_stop_enabled_1
= target_non_stop_enabled
;
3971 error (_("Cannot change this setting while the inferior is running."));
3974 target_non_stop_enabled
= target_non_stop_enabled_1
;
3977 /* Implementation of "maint show target-non-stop". */
3980 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3981 struct cmd_list_element
*c
,
3984 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3985 fprintf_filtered (file
,
3986 _("Whether the target is always in non-stop mode "
3987 "is %s (currently %s).\n"), value
,
3988 target_always_non_stop_p () ? "on" : "off");
3990 fprintf_filtered (file
,
3991 _("Whether the target is always in non-stop mode "
3992 "is %s.\n"), value
);
3995 /* Temporary copies of permission settings. */
3997 static bool may_write_registers_1
= true;
3998 static bool may_write_memory_1
= true;
3999 static bool may_insert_breakpoints_1
= true;
4000 static bool may_insert_tracepoints_1
= true;
4001 static bool may_insert_fast_tracepoints_1
= true;
4002 static bool may_stop_1
= true;
4004 /* Make the user-set values match the real values again. */
4007 update_target_permissions (void)
4009 may_write_registers_1
= may_write_registers
;
4010 may_write_memory_1
= may_write_memory
;
4011 may_insert_breakpoints_1
= may_insert_breakpoints
;
4012 may_insert_tracepoints_1
= may_insert_tracepoints
;
4013 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4014 may_stop_1
= may_stop
;
4017 /* The one function handles (most of) the permission flags in the same
4021 set_target_permissions (const char *args
, int from_tty
,
4022 struct cmd_list_element
*c
)
4024 if (target_has_execution
)
4026 update_target_permissions ();
4027 error (_("Cannot change this setting while the inferior is running."));
4030 /* Make the real values match the user-changed values. */
4031 may_write_registers
= may_write_registers_1
;
4032 may_insert_breakpoints
= may_insert_breakpoints_1
;
4033 may_insert_tracepoints
= may_insert_tracepoints_1
;
4034 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4035 may_stop
= may_stop_1
;
4036 update_observer_mode ();
4039 /* Set memory write permission independently of observer mode. */
4042 set_write_memory_permission (const char *args
, int from_tty
,
4043 struct cmd_list_element
*c
)
4045 /* Make the real values match the user-changed values. */
4046 may_write_memory
= may_write_memory_1
;
4047 update_observer_mode ();
4050 void _initialize_target ();
4053 _initialize_target ()
4055 the_debug_target
= new debug_target ();
4057 add_info ("target", info_target_command
, targ_desc
);
4058 add_info ("files", info_target_command
, targ_desc
);
4060 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4061 Set target debugging."), _("\
4062 Show target debugging."), _("\
4063 When non-zero, target debugging is enabled. Higher numbers are more\n\
4067 &setdebuglist
, &showdebuglist
);
4069 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4070 &trust_readonly
, _("\
4071 Set mode for reading from readonly sections."), _("\
4072 Show mode for reading from readonly sections."), _("\
4073 When this mode is on, memory reads from readonly sections (such as .text)\n\
4074 will be read from the object file instead of from the target. This will\n\
4075 result in significant performance improvement for remote targets."),
4077 show_trust_readonly
,
4078 &setlist
, &showlist
);
4080 add_com ("monitor", class_obscure
, do_monitor_command
,
4081 _("Send a command to the remote monitor (remote targets only)."));
4083 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4084 _("Print the name of each layer of the internal target stack."),
4085 &maintenanceprintlist
);
4087 add_setshow_boolean_cmd ("target-async", no_class
,
4088 &target_async_permitted_1
, _("\
4089 Set whether gdb controls the inferior in asynchronous mode."), _("\
4090 Show whether gdb controls the inferior in asynchronous mode."), _("\
4091 Tells gdb whether to control the inferior in asynchronous mode."),
4092 maint_set_target_async_command
,
4093 maint_show_target_async_command
,
4094 &maintenance_set_cmdlist
,
4095 &maintenance_show_cmdlist
);
4097 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4098 &target_non_stop_enabled_1
, _("\
4099 Set whether gdb always controls the inferior in non-stop mode."), _("\
4100 Show whether gdb always controls the inferior in non-stop mode."), _("\
4101 Tells gdb whether to control the inferior in non-stop mode."),
4102 maint_set_target_non_stop_command
,
4103 maint_show_target_non_stop_command
,
4104 &maintenance_set_cmdlist
,
4105 &maintenance_show_cmdlist
);
4107 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4108 &may_write_registers_1
, _("\
4109 Set permission to write into registers."), _("\
4110 Show permission to write into registers."), _("\
4111 When this permission is on, GDB may write into the target's registers.\n\
4112 Otherwise, any sort of write attempt will result in an error."),
4113 set_target_permissions
, NULL
,
4114 &setlist
, &showlist
);
4116 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4117 &may_write_memory_1
, _("\
4118 Set permission to write into target memory."), _("\
4119 Show permission to write into target memory."), _("\
4120 When this permission is on, GDB may write into the target's memory.\n\
4121 Otherwise, any sort of write attempt will result in an error."),
4122 set_write_memory_permission
, NULL
,
4123 &setlist
, &showlist
);
4125 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4126 &may_insert_breakpoints_1
, _("\
4127 Set permission to insert breakpoints in the target."), _("\
4128 Show permission to insert breakpoints in the target."), _("\
4129 When this permission is on, GDB may insert breakpoints in the program.\n\
4130 Otherwise, any sort of insertion attempt will result in an error."),
4131 set_target_permissions
, NULL
,
4132 &setlist
, &showlist
);
4134 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4135 &may_insert_tracepoints_1
, _("\
4136 Set permission to insert tracepoints in the target."), _("\
4137 Show permission to insert tracepoints in the target."), _("\
4138 When this permission is on, GDB may insert tracepoints in the program.\n\
4139 Otherwise, any sort of insertion attempt will result in an error."),
4140 set_target_permissions
, NULL
,
4141 &setlist
, &showlist
);
4143 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4144 &may_insert_fast_tracepoints_1
, _("\
4145 Set permission to insert fast tracepoints in the target."), _("\
4146 Show permission to insert fast tracepoints in the target."), _("\
4147 When this permission is on, GDB may insert fast tracepoints.\n\
4148 Otherwise, any sort of insertion attempt will result in an error."),
4149 set_target_permissions
, NULL
,
4150 &setlist
, &showlist
);
4152 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4154 Set permission to interrupt or signal the target."), _("\
4155 Show permission to interrupt or signal the target."), _("\
4156 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4157 Otherwise, any attempt to interrupt or stop will be ignored."),
4158 set_target_permissions
, NULL
,
4159 &setlist
, &showlist
);
4161 add_com ("flash-erase", no_class
, flash_erase_command
,
4162 _("Erase all flash memory regions."));
4164 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4165 &auto_connect_native_target
, _("\
4166 Set whether GDB may automatically connect to the native target."), _("\
4167 Show whether GDB may automatically connect to the native target."), _("\
4168 When on, and GDB is not connected to a target yet, GDB\n\
4169 attempts \"run\" and other commands with the native target."),
4170 NULL
, show_auto_connect_native_target
,
4171 &setlist
, &showlist
);