1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2019 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 "common/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "common/byte-vector.h"
51 #include <unordered_map>
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
55 static void default_terminal_info (struct target_ops
*, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops
*,
58 CORE_ADDR
, CORE_ADDR
, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
63 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
65 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
68 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
71 static void default_mourn_inferior (struct target_ops
*self
);
73 static int default_search_memory (struct target_ops
*ops
,
75 ULONGEST search_space_len
,
76 const gdb_byte
*pattern
,
78 CORE_ADDR
*found_addrp
);
80 static int default_verify_memory (struct target_ops
*self
,
82 CORE_ADDR memaddr
, ULONGEST size
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static struct target_ops
*find_default_run_target (const char *);
88 static int dummy_find_memory_regions (struct target_ops
*self
,
89 find_memory_region_ftype ignore1
,
92 static char *dummy_make_corefile_notes (struct target_ops
*self
,
93 bfd
*ignore1
, int *ignore2
);
95 static const char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
97 static enum exec_direction_kind default_execution_direction
98 (struct target_ops
*self
);
100 /* Mapping between target_info objects (which have address identity)
101 and corresponding open/factory function/callback. Each add_target
102 call adds one entry to this map, and registers a "target
103 TARGET_NAME" command that when invoked calls the factory registered
104 here. The target_info object is associated with the command via
105 the command's context. */
106 static std::unordered_map
<const target_info
*, target_open_ftype
*>
109 /* The initial current target, so that there is always a semi-valid
112 static struct target_ops
*the_dummy_target
;
113 static struct target_ops
*the_debug_target
;
115 /* The target stack. */
117 static target_stack g_target_stack
;
119 /* Top of target stack. */
120 /* The target structure we are currently using to talk to a process
121 or file or whatever "inferior" we have. */
124 current_top_target ()
126 return g_target_stack
.top ();
129 /* Command list for target. */
131 static struct cmd_list_element
*targetlist
= NULL
;
133 /* Nonzero if we should trust readonly sections from the
134 executable when reading memory. */
136 static int trust_readonly
= 0;
138 /* Nonzero if we should show true memory content including
139 memory breakpoint inserted by gdb. */
141 static int show_memory_breakpoints
= 0;
143 /* These globals control whether GDB attempts to perform these
144 operations; they are useful for targets that need to prevent
145 inadvertant disruption, such as in non-stop mode. */
147 int may_write_registers
= 1;
149 int may_write_memory
= 1;
151 int may_insert_breakpoints
= 1;
153 int may_insert_tracepoints
= 1;
155 int may_insert_fast_tracepoints
= 1;
159 /* Non-zero if we want to see trace of target level stuff. */
161 static unsigned int targetdebug
= 0;
164 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
167 push_target (the_debug_target
);
169 unpush_target (the_debug_target
);
173 show_targetdebug (struct ui_file
*file
, int from_tty
,
174 struct cmd_list_element
*c
, const char *value
)
176 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
179 /* The user just typed 'target' without the name of a target. */
182 target_command (const char *arg
, int from_tty
)
184 fputs_filtered ("Argument required (target name). Try `help target'\n",
189 target_has_all_memory_1 (void)
191 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
192 if (t
->has_all_memory ())
199 target_has_memory_1 (void)
201 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
202 if (t
->has_memory ())
209 target_has_stack_1 (void)
211 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
219 target_has_registers_1 (void)
221 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
222 if (t
->has_registers ())
229 target_has_execution_1 (ptid_t the_ptid
)
231 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
232 if (t
->has_execution (the_ptid
))
239 target_has_execution_current (void)
241 return target_has_execution_1 (inferior_ptid
);
244 /* This is used to implement the various target commands. */
247 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
249 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
250 target_open_ftype
*func
= target_factories
[ti
];
253 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
256 func (args
, from_tty
);
259 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
260 ti
->shortname
, args
, from_tty
);
266 add_target (const target_info
&t
, target_open_ftype
*func
,
267 completer_ftype
*completer
)
269 struct cmd_list_element
*c
;
271 auto &func_slot
= target_factories
[&t
];
272 if (func_slot
!= nullptr)
273 internal_error (__FILE__
, __LINE__
,
274 _("target already added (\"%s\")."), t
.shortname
);
277 if (targetlist
== NULL
)
278 add_prefix_cmd ("target", class_run
, target_command
, _("\
279 Connect to a target machine or process.\n\
280 The first argument is the type or protocol of the target machine.\n\
281 Remaining arguments are interpreted by the target protocol. For more\n\
282 information on the arguments for a particular protocol, type\n\
283 `help target ' followed by the protocol name."),
284 &targetlist
, "target ", 0, &cmdlist
);
285 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
286 set_cmd_context (c
, (void *) &t
);
287 set_cmd_sfunc (c
, open_target
);
288 if (completer
!= NULL
)
289 set_cmd_completer (c
, completer
);
295 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
297 struct cmd_list_element
*c
;
300 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
302 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
303 set_cmd_sfunc (c
, open_target
);
304 set_cmd_context (c
, (void *) &tinfo
);
305 alt
= xstrprintf ("target %s", tinfo
.shortname
);
306 deprecate_cmd (c
, alt
);
314 current_top_target ()->kill ();
318 target_load (const char *arg
, int from_tty
)
320 target_dcache_invalidate ();
321 current_top_target ()->load (arg
, from_tty
);
326 target_terminal_state
target_terminal::m_terminal_state
327 = target_terminal_state::is_ours
;
329 /* See target/target.h. */
332 target_terminal::init (void)
334 current_top_target ()->terminal_init ();
336 m_terminal_state
= target_terminal_state::is_ours
;
339 /* See target/target.h. */
342 target_terminal::inferior (void)
344 struct ui
*ui
= current_ui
;
346 /* A background resume (``run&'') should leave GDB in control of the
348 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
351 /* Since we always run the inferior in the main console (unless "set
352 inferior-tty" is in effect), when some UI other than the main one
353 calls target_terminal::inferior, then we leave the main UI's
354 terminal settings as is. */
358 /* If GDB is resuming the inferior in the foreground, install
359 inferior's terminal modes. */
361 struct inferior
*inf
= current_inferior ();
363 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
365 current_top_target ()->terminal_inferior ();
366 inf
->terminal_state
= target_terminal_state::is_inferior
;
369 m_terminal_state
= target_terminal_state::is_inferior
;
371 /* If the user hit C-c before, pretend that it was hit right
373 if (check_quit_flag ())
374 target_pass_ctrlc ();
377 /* See target/target.h. */
380 target_terminal::restore_inferior (void)
382 struct ui
*ui
= current_ui
;
384 /* See target_terminal::inferior(). */
385 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
388 /* Restore the terminal settings of inferiors that were in the
389 foreground but are now ours_for_output due to a temporary
390 target_target::ours_for_output() call. */
393 scoped_restore_current_inferior restore_inferior
;
395 for (::inferior
*inf
: all_inferiors ())
397 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
399 set_current_inferior (inf
);
400 current_top_target ()->terminal_inferior ();
401 inf
->terminal_state
= target_terminal_state::is_inferior
;
406 m_terminal_state
= target_terminal_state::is_inferior
;
408 /* If the user hit C-c before, pretend that it was hit right
410 if (check_quit_flag ())
411 target_pass_ctrlc ();
414 /* Switch terminal state to DESIRED_STATE, either is_ours, or
415 is_ours_for_output. */
418 target_terminal_is_ours_kind (target_terminal_state desired_state
)
420 scoped_restore_current_inferior restore_inferior
;
422 /* Must do this in two passes. First, have all inferiors save the
423 current terminal settings. Then, after all inferiors have add a
424 chance to safely save the terminal settings, restore GDB's
425 terminal settings. */
427 for (inferior
*inf
: all_inferiors ())
429 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
431 set_current_inferior (inf
);
432 current_top_target ()->terminal_save_inferior ();
436 for (inferior
*inf
: all_inferiors ())
438 /* Note we don't check is_inferior here like above because we
439 need to handle 'is_ours_for_output -> is_ours' too. Careful
440 to never transition from 'is_ours' to 'is_ours_for_output',
442 if (inf
->terminal_state
!= target_terminal_state::is_ours
443 && inf
->terminal_state
!= desired_state
)
445 set_current_inferior (inf
);
446 if (desired_state
== target_terminal_state::is_ours
)
447 current_top_target ()->terminal_ours ();
448 else if (desired_state
== target_terminal_state::is_ours_for_output
)
449 current_top_target ()->terminal_ours_for_output ();
451 gdb_assert_not_reached ("unhandled desired state");
452 inf
->terminal_state
= desired_state
;
457 /* See target/target.h. */
460 target_terminal::ours ()
462 struct ui
*ui
= current_ui
;
464 /* See target_terminal::inferior. */
468 if (m_terminal_state
== target_terminal_state::is_ours
)
471 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
472 m_terminal_state
= target_terminal_state::is_ours
;
475 /* See target/target.h. */
478 target_terminal::ours_for_output ()
480 struct ui
*ui
= current_ui
;
482 /* See target_terminal::inferior. */
486 if (!target_terminal::is_inferior ())
489 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
490 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
493 /* See target/target.h. */
496 target_terminal::info (const char *arg
, int from_tty
)
498 current_top_target ()->terminal_info (arg
, from_tty
);
504 target_supports_terminal_ours (void)
506 /* This can be called before there is any target, so we must check
508 target_ops
*top
= current_top_target ();
512 return top
->supports_terminal_ours ();
518 error (_("You can't do that when your target is `%s'"),
519 current_top_target ()->shortname ());
525 error (_("You can't do that without a process to debug."));
529 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
531 printf_unfiltered (_("No saved terminal information.\n"));
534 /* A default implementation for the to_get_ada_task_ptid target method.
536 This function builds the PTID by using both LWP and TID as part of
537 the PTID lwp and tid elements. The pid used is the pid of the
541 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
543 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
546 static enum exec_direction_kind
547 default_execution_direction (struct target_ops
*self
)
549 if (!target_can_execute_reverse
)
551 else if (!target_can_async_p ())
554 gdb_assert_not_reached ("\
555 to_execution_direction must be implemented for reverse async");
561 target_stack::push (target_ops
*t
)
563 /* If there's already a target at this stratum, remove it. */
564 strata stratum
= t
->stratum ();
566 if (m_stack
[stratum
] != NULL
)
568 target_ops
*prev
= m_stack
[stratum
];
569 m_stack
[stratum
] = NULL
;
573 /* Now add the new one. */
574 m_stack
[stratum
] = t
;
583 push_target (struct target_ops
*t
)
585 g_target_stack
.push (t
);
591 push_target (target_ops_up
&&t
)
593 g_target_stack
.push (t
.get ());
600 unpush_target (struct target_ops
*t
)
602 return g_target_stack
.unpush (t
);
608 target_stack::unpush (target_ops
*t
)
610 gdb_assert (t
!= NULL
);
612 strata stratum
= t
->stratum ();
614 if (stratum
== dummy_stratum
)
615 internal_error (__FILE__
, __LINE__
,
616 _("Attempt to unpush the dummy target"));
618 /* Look for the specified target. Note that a target can only occur
619 once in the target stack. */
621 if (m_stack
[stratum
] != t
)
623 /* If T wasn't pushed, quit. Only open targets should be
628 /* Unchain the target. */
629 m_stack
[stratum
] = NULL
;
631 if (m_top
== stratum
)
632 m_top
= t
->beneath ()->stratum ();
634 /* Finally close the target. Note we do this after unchaining, so
635 any target method calls from within the target_close
636 implementation don't end up in T anymore. */
642 /* Unpush TARGET and assert that it worked. */
645 unpush_target_and_assert (struct target_ops
*target
)
647 if (!unpush_target (target
))
649 fprintf_unfiltered (gdb_stderr
,
650 "pop_all_targets couldn't find target %s\n",
651 target
->shortname ());
652 internal_error (__FILE__
, __LINE__
,
653 _("failed internal consistency check"));
658 pop_all_targets_above (enum strata above_stratum
)
660 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
661 unpush_target_and_assert (current_top_target ());
667 pop_all_targets_at_and_above (enum strata stratum
)
669 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
670 unpush_target_and_assert (current_top_target ());
674 pop_all_targets (void)
676 pop_all_targets_above (dummy_stratum
);
679 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
682 target_is_pushed (struct target_ops
*t
)
684 return g_target_stack
.is_pushed (t
);
687 /* Default implementation of to_get_thread_local_address. */
690 generic_tls_error (void)
692 throw_error (TLS_GENERIC_ERROR
,
693 _("Cannot find thread-local variables on this target"));
696 /* Using the objfile specified in OBJFILE, find the address for the
697 current thread's thread-local storage with offset OFFSET. */
699 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
701 volatile CORE_ADDR addr
= 0;
702 struct target_ops
*target
= current_top_target ();
704 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
706 ptid_t ptid
= inferior_ptid
;
712 /* Fetch the load module address for this objfile. */
713 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
716 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
718 /* If an error occurred, print TLS related messages here. Otherwise,
719 throw the error to some higher catcher. */
720 CATCH (ex
, RETURN_MASK_ALL
)
722 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
726 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
727 error (_("Cannot find thread-local variables "
728 "in this thread library."));
730 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
731 if (objfile_is_library
)
732 error (_("Cannot find shared library `%s' in dynamic"
733 " linker's load module list"), objfile_name (objfile
));
735 error (_("Cannot find executable file `%s' in dynamic"
736 " linker's load module list"), objfile_name (objfile
));
738 case TLS_NOT_ALLOCATED_YET_ERROR
:
739 if (objfile_is_library
)
740 error (_("The inferior has not yet allocated storage for"
741 " thread-local variables in\n"
742 "the shared library `%s'\n"
744 objfile_name (objfile
), target_pid_to_str (ptid
));
746 error (_("The inferior has not yet allocated storage for"
747 " thread-local variables in\n"
748 "the executable `%s'\n"
750 objfile_name (objfile
), target_pid_to_str (ptid
));
752 case TLS_GENERIC_ERROR
:
753 if (objfile_is_library
)
754 error (_("Cannot find thread-local storage for %s, "
755 "shared library %s:\n%s"),
756 target_pid_to_str (ptid
),
757 objfile_name (objfile
), ex
.message
);
759 error (_("Cannot find thread-local storage for %s, "
760 "executable file %s:\n%s"),
761 target_pid_to_str (ptid
),
762 objfile_name (objfile
), ex
.message
);
765 throw_exception (ex
);
771 /* It wouldn't be wrong here to try a gdbarch method, too; finding
772 TLS is an ABI-specific thing. But we don't do that yet. */
774 error (_("Cannot find thread-local variables on this target"));
780 target_xfer_status_to_string (enum target_xfer_status status
)
782 #define CASE(X) case X: return #X
785 CASE(TARGET_XFER_E_IO
);
786 CASE(TARGET_XFER_UNAVAILABLE
);
795 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
797 /* target_read_string -- read a null terminated string, up to LEN bytes,
798 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
799 Set *STRING to a pointer to malloc'd memory containing the data; the caller
800 is responsible for freeing it. Return the number of bytes successfully
804 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
805 int len
, int *errnop
)
811 int buffer_allocated
;
813 unsigned int nbytes_read
= 0;
817 /* Small for testing. */
818 buffer_allocated
= 4;
819 buffer
= (char *) xmalloc (buffer_allocated
);
824 tlen
= MIN (len
, 4 - (memaddr
& 3));
825 offset
= memaddr
& 3;
827 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
830 /* The transfer request might have crossed the boundary to an
831 unallocated region of memory. Retry the transfer, requesting
835 errcode
= target_read_memory (memaddr
, buf
, 1);
840 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
844 bytes
= bufptr
- buffer
;
845 buffer_allocated
*= 2;
846 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
847 bufptr
= buffer
+ bytes
;
850 for (i
= 0; i
< tlen
; i
++)
852 *bufptr
++ = buf
[i
+ offset
];
853 if (buf
[i
+ offset
] == '\000')
855 nbytes_read
+= i
+ 1;
865 string
->reset (buffer
);
871 struct target_section_table
*
872 target_get_section_table (struct target_ops
*target
)
874 return target
->get_section_table ();
877 /* Find a section containing ADDR. */
879 struct target_section
*
880 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
882 struct target_section_table
*table
= target_get_section_table (target
);
883 struct target_section
*secp
;
888 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
890 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
897 /* Helper for the memory xfer routines. Checks the attributes of the
898 memory region of MEMADDR against the read or write being attempted.
899 If the access is permitted returns true, otherwise returns false.
900 REGION_P is an optional output parameter. If not-NULL, it is
901 filled with a pointer to the memory region of MEMADDR. REG_LEN
902 returns LEN trimmed to the end of the region. This is how much the
903 caller can continue requesting, if the access is permitted. A
904 single xfer request must not straddle memory region boundaries. */
907 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
908 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
909 struct mem_region
**region_p
)
911 struct mem_region
*region
;
913 region
= lookup_mem_region (memaddr
);
915 if (region_p
!= NULL
)
918 switch (region
->attrib
.mode
)
921 if (writebuf
!= NULL
)
931 /* We only support writing to flash during "load" for now. */
932 if (writebuf
!= NULL
)
933 error (_("Writing to flash memory forbidden in this context"));
940 /* region->hi == 0 means there's no upper bound. */
941 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
944 *reg_len
= region
->hi
- memaddr
;
949 /* Read memory from more than one valid target. A core file, for
950 instance, could have some of memory but delegate other bits to
951 the target below it. So, we must manually try all targets. */
953 enum target_xfer_status
954 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
955 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
956 ULONGEST
*xfered_len
)
958 enum target_xfer_status res
;
962 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
963 readbuf
, writebuf
, memaddr
, len
,
965 if (res
== TARGET_XFER_OK
)
968 /* Stop if the target reports that the memory is not available. */
969 if (res
== TARGET_XFER_UNAVAILABLE
)
972 /* We want to continue past core files to executables, but not
973 past a running target's memory. */
974 if (ops
->has_all_memory ())
977 ops
= ops
->beneath ();
981 /* The cache works at the raw memory level. Make sure the cache
982 gets updated with raw contents no matter what kind of memory
983 object was originally being written. Note we do write-through
984 first, so that if it fails, we don't write to the cache contents
985 that never made it to the target. */
987 && inferior_ptid
!= null_ptid
988 && target_dcache_init_p ()
989 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
991 DCACHE
*dcache
= target_dcache_get ();
993 /* Note that writing to an area of memory which wasn't present
994 in the cache doesn't cause it to be loaded in. */
995 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1001 /* Perform a partial memory transfer.
1002 For docs see target.h, to_xfer_partial. */
1004 static enum target_xfer_status
1005 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1006 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1007 ULONGEST len
, ULONGEST
*xfered_len
)
1009 enum target_xfer_status res
;
1011 struct mem_region
*region
;
1012 struct inferior
*inf
;
1014 /* For accesses to unmapped overlay sections, read directly from
1015 files. Must do this first, as MEMADDR may need adjustment. */
1016 if (readbuf
!= NULL
&& overlay_debugging
)
1018 struct obj_section
*section
= find_pc_overlay (memaddr
);
1020 if (pc_in_unmapped_range (memaddr
, section
))
1022 struct target_section_table
*table
1023 = target_get_section_table (ops
);
1024 const char *section_name
= section
->the_bfd_section
->name
;
1026 memaddr
= overlay_mapped_address (memaddr
, section
);
1027 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1028 memaddr
, len
, xfered_len
,
1030 table
->sections_end
,
1035 /* Try the executable files, if "trust-readonly-sections" is set. */
1036 if (readbuf
!= NULL
&& trust_readonly
)
1038 struct target_section
*secp
;
1039 struct target_section_table
*table
;
1041 secp
= target_section_by_addr (ops
, memaddr
);
1043 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1044 secp
->the_bfd_section
)
1047 table
= target_get_section_table (ops
);
1048 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1049 memaddr
, len
, xfered_len
,
1051 table
->sections_end
,
1056 /* Try GDB's internal data cache. */
1058 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1060 return TARGET_XFER_E_IO
;
1062 if (inferior_ptid
!= null_ptid
)
1063 inf
= current_inferior ();
1069 /* The dcache reads whole cache lines; that doesn't play well
1070 with reading from a trace buffer, because reading outside of
1071 the collected memory range fails. */
1072 && get_traceframe_number () == -1
1073 && (region
->attrib
.cache
1074 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1075 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1077 DCACHE
*dcache
= target_dcache_get_or_init ();
1079 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1080 reg_len
, xfered_len
);
1083 /* If none of those methods found the memory we wanted, fall back
1084 to a target partial transfer. Normally a single call to
1085 to_xfer_partial is enough; if it doesn't recognize an object
1086 it will call the to_xfer_partial of the next target down.
1087 But for memory this won't do. Memory is the only target
1088 object which can be read from more than one valid target.
1089 A core file, for instance, could have some of memory but
1090 delegate other bits to the target below it. So, we must
1091 manually try all targets. */
1093 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1096 /* If we still haven't got anything, return the last error. We
1101 /* Perform a partial memory transfer. For docs see target.h,
1104 static enum target_xfer_status
1105 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1106 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1107 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1109 enum target_xfer_status res
;
1111 /* Zero length requests are ok and require no work. */
1113 return TARGET_XFER_EOF
;
1115 memaddr
= address_significant (target_gdbarch (), memaddr
);
1117 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1118 breakpoint insns, thus hiding out from higher layers whether
1119 there are software breakpoints inserted in the code stream. */
1120 if (readbuf
!= NULL
)
1122 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1125 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1126 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1130 /* A large write request is likely to be partially satisfied
1131 by memory_xfer_partial_1. We will continually malloc
1132 and free a copy of the entire write request for breakpoint
1133 shadow handling even though we only end up writing a small
1134 subset of it. Cap writes to a limit specified by the target
1135 to mitigate this. */
1136 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1138 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1139 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1140 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1147 scoped_restore_tmpl
<int>
1148 make_scoped_restore_show_memory_breakpoints (int show
)
1150 return make_scoped_restore (&show_memory_breakpoints
, show
);
1153 /* For docs see target.h, to_xfer_partial. */
1155 enum target_xfer_status
1156 target_xfer_partial (struct target_ops
*ops
,
1157 enum target_object object
, const char *annex
,
1158 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1159 ULONGEST offset
, ULONGEST len
,
1160 ULONGEST
*xfered_len
)
1162 enum target_xfer_status retval
;
1164 /* Transfer is done when LEN is zero. */
1166 return TARGET_XFER_EOF
;
1168 if (writebuf
&& !may_write_memory
)
1169 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1170 core_addr_to_string_nz (offset
), plongest (len
));
1174 /* If this is a memory transfer, let the memory-specific code
1175 have a look at it instead. Memory transfers are more
1177 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1178 || object
== TARGET_OBJECT_CODE_MEMORY
)
1179 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1180 writebuf
, offset
, len
, xfered_len
);
1181 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1183 /* Skip/avoid accessing the target if the memory region
1184 attributes block the access. Check this here instead of in
1185 raw_memory_xfer_partial as otherwise we'd end up checking
1186 this twice in the case of the memory_xfer_partial path is
1187 taken; once before checking the dcache, and another in the
1188 tail call to raw_memory_xfer_partial. */
1189 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1191 return TARGET_XFER_E_IO
;
1193 /* Request the normal memory object from other layers. */
1194 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1198 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1199 writebuf
, offset
, len
, xfered_len
);
1203 const unsigned char *myaddr
= NULL
;
1205 fprintf_unfiltered (gdb_stdlog
,
1206 "%s:target_xfer_partial "
1207 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1210 (annex
? annex
: "(null)"),
1211 host_address_to_string (readbuf
),
1212 host_address_to_string (writebuf
),
1213 core_addr_to_string_nz (offset
),
1214 pulongest (len
), retval
,
1215 pulongest (*xfered_len
));
1221 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1225 fputs_unfiltered (", bytes =", gdb_stdlog
);
1226 for (i
= 0; i
< *xfered_len
; i
++)
1228 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1230 if (targetdebug
< 2 && i
> 0)
1232 fprintf_unfiltered (gdb_stdlog
, " ...");
1235 fprintf_unfiltered (gdb_stdlog
, "\n");
1238 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1242 fputc_unfiltered ('\n', gdb_stdlog
);
1245 /* Check implementations of to_xfer_partial update *XFERED_LEN
1246 properly. Do assertion after printing debug messages, so that we
1247 can find more clues on assertion failure from debugging messages. */
1248 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1249 gdb_assert (*xfered_len
> 0);
1254 /* Read LEN bytes of target memory at address MEMADDR, placing the
1255 results in GDB's memory at MYADDR. Returns either 0 for success or
1256 -1 if any error occurs.
1258 If an error occurs, no guarantee is made about the contents of the data at
1259 MYADDR. In particular, the caller should not depend upon partial reads
1260 filling the buffer with good data. There is no way for the caller to know
1261 how much good data might have been transfered anyway. Callers that can
1262 deal with partial reads should call target_read (which will retry until
1263 it makes no progress, and then return how much was transferred). */
1266 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1268 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1269 myaddr
, memaddr
, len
) == len
)
1275 /* See target/target.h. */
1278 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1283 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1286 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1287 gdbarch_byte_order (target_gdbarch ()));
1291 /* Like target_read_memory, but specify explicitly that this is a read
1292 from the target's raw memory. That is, this read bypasses the
1293 dcache, breakpoint shadowing, etc. */
1296 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1298 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1299 myaddr
, memaddr
, len
) == len
)
1305 /* Like target_read_memory, but specify explicitly that this is a read from
1306 the target's stack. This may trigger different cache behavior. */
1309 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1311 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1312 myaddr
, memaddr
, len
) == len
)
1318 /* Like target_read_memory, but specify explicitly that this is a read from
1319 the target's code. This may trigger different cache behavior. */
1322 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1324 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1325 myaddr
, memaddr
, len
) == len
)
1331 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1332 Returns either 0 for success or -1 if any error occurs. If an
1333 error occurs, no guarantee is made about how much data got written.
1334 Callers that can deal with partial writes should call
1338 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1340 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1341 myaddr
, memaddr
, len
) == len
)
1347 /* Write LEN bytes from MYADDR to target raw memory at address
1348 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1349 If an error occurs, no guarantee is made about how much data got
1350 written. Callers that can deal with partial writes should call
1354 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1356 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1357 myaddr
, memaddr
, len
) == len
)
1363 /* Fetch the target's memory map. */
1365 std::vector
<mem_region
>
1366 target_memory_map (void)
1368 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1369 if (result
.empty ())
1372 std::sort (result
.begin (), result
.end ());
1374 /* Check that regions do not overlap. Simultaneously assign
1375 a numbering for the "mem" commands to use to refer to
1377 mem_region
*last_one
= NULL
;
1378 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1380 mem_region
*this_one
= &result
[ix
];
1381 this_one
->number
= ix
;
1383 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1385 warning (_("Overlapping regions in memory map: ignoring"));
1386 return std::vector
<mem_region
> ();
1389 last_one
= this_one
;
1396 target_flash_erase (ULONGEST address
, LONGEST length
)
1398 current_top_target ()->flash_erase (address
, length
);
1402 target_flash_done (void)
1404 current_top_target ()->flash_done ();
1408 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1409 struct cmd_list_element
*c
, const char *value
)
1411 fprintf_filtered (file
,
1412 _("Mode for reading from readonly sections is %s.\n"),
1416 /* Target vector read/write partial wrapper functions. */
1418 static enum target_xfer_status
1419 target_read_partial (struct target_ops
*ops
,
1420 enum target_object object
,
1421 const char *annex
, gdb_byte
*buf
,
1422 ULONGEST offset
, ULONGEST len
,
1423 ULONGEST
*xfered_len
)
1425 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1429 static enum target_xfer_status
1430 target_write_partial (struct target_ops
*ops
,
1431 enum target_object object
,
1432 const char *annex
, const gdb_byte
*buf
,
1433 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1435 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1439 /* Wrappers to perform the full transfer. */
1441 /* For docs on target_read see target.h. */
1444 target_read (struct target_ops
*ops
,
1445 enum target_object object
,
1446 const char *annex
, gdb_byte
*buf
,
1447 ULONGEST offset
, LONGEST len
)
1449 LONGEST xfered_total
= 0;
1452 /* If we are reading from a memory object, find the length of an addressable
1453 unit for that architecture. */
1454 if (object
== TARGET_OBJECT_MEMORY
1455 || object
== TARGET_OBJECT_STACK_MEMORY
1456 || object
== TARGET_OBJECT_CODE_MEMORY
1457 || object
== TARGET_OBJECT_RAW_MEMORY
)
1458 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1460 while (xfered_total
< len
)
1462 ULONGEST xfered_partial
;
1463 enum target_xfer_status status
;
1465 status
= target_read_partial (ops
, object
, annex
,
1466 buf
+ xfered_total
* unit_size
,
1467 offset
+ xfered_total
, len
- xfered_total
,
1470 /* Call an observer, notifying them of the xfer progress? */
1471 if (status
== TARGET_XFER_EOF
)
1472 return xfered_total
;
1473 else if (status
== TARGET_XFER_OK
)
1475 xfered_total
+= xfered_partial
;
1479 return TARGET_XFER_E_IO
;
1485 /* Assuming that the entire [begin, end) range of memory cannot be
1486 read, try to read whatever subrange is possible to read.
1488 The function returns, in RESULT, either zero or one memory block.
1489 If there's a readable subrange at the beginning, it is completely
1490 read and returned. Any further readable subrange will not be read.
1491 Otherwise, if there's a readable subrange at the end, it will be
1492 completely read and returned. Any readable subranges before it
1493 (obviously, not starting at the beginning), will be ignored. In
1494 other cases -- either no readable subrange, or readable subrange(s)
1495 that is neither at the beginning, or end, nothing is returned.
1497 The purpose of this function is to handle a read across a boundary
1498 of accessible memory in a case when memory map is not available.
1499 The above restrictions are fine for this case, but will give
1500 incorrect results if the memory is 'patchy'. However, supporting
1501 'patchy' memory would require trying to read every single byte,
1502 and it seems unacceptable solution. Explicit memory map is
1503 recommended for this case -- and target_read_memory_robust will
1504 take care of reading multiple ranges then. */
1507 read_whatever_is_readable (struct target_ops
*ops
,
1508 const ULONGEST begin
, const ULONGEST end
,
1510 std::vector
<memory_read_result
> *result
)
1512 ULONGEST current_begin
= begin
;
1513 ULONGEST current_end
= end
;
1515 ULONGEST xfered_len
;
1517 /* If we previously failed to read 1 byte, nothing can be done here. */
1518 if (end
- begin
<= 1)
1521 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1523 /* Check that either first or the last byte is readable, and give up
1524 if not. This heuristic is meant to permit reading accessible memory
1525 at the boundary of accessible region. */
1526 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1527 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1532 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1533 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1534 &xfered_len
) == TARGET_XFER_OK
)
1542 /* Loop invariant is that the [current_begin, current_end) was previously
1543 found to be not readable as a whole.
1545 Note loop condition -- if the range has 1 byte, we can't divide the range
1546 so there's no point trying further. */
1547 while (current_end
- current_begin
> 1)
1549 ULONGEST first_half_begin
, first_half_end
;
1550 ULONGEST second_half_begin
, second_half_end
;
1552 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1556 first_half_begin
= current_begin
;
1557 first_half_end
= middle
;
1558 second_half_begin
= middle
;
1559 second_half_end
= current_end
;
1563 first_half_begin
= middle
;
1564 first_half_end
= current_end
;
1565 second_half_begin
= current_begin
;
1566 second_half_end
= middle
;
1569 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1570 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1572 first_half_end
- first_half_begin
);
1574 if (xfer
== first_half_end
- first_half_begin
)
1576 /* This half reads up fine. So, the error must be in the
1578 current_begin
= second_half_begin
;
1579 current_end
= second_half_end
;
1583 /* This half is not readable. Because we've tried one byte, we
1584 know some part of this half if actually readable. Go to the next
1585 iteration to divide again and try to read.
1587 We don't handle the other half, because this function only tries
1588 to read a single readable subrange. */
1589 current_begin
= first_half_begin
;
1590 current_end
= first_half_end
;
1596 /* The [begin, current_begin) range has been read. */
1597 result
->emplace_back (begin
, current_end
, std::move (buf
));
1601 /* The [current_end, end) range has been read. */
1602 LONGEST region_len
= end
- current_end
;
1604 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1605 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1606 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1607 region_len
* unit_size
);
1608 result
->emplace_back (current_end
, end
, std::move (data
));
1612 std::vector
<memory_read_result
>
1613 read_memory_robust (struct target_ops
*ops
,
1614 const ULONGEST offset
, const LONGEST len
)
1616 std::vector
<memory_read_result
> result
;
1617 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1619 LONGEST xfered_total
= 0;
1620 while (xfered_total
< len
)
1622 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1625 /* If there is no explicit region, a fake one should be created. */
1626 gdb_assert (region
);
1628 if (region
->hi
== 0)
1629 region_len
= len
- xfered_total
;
1631 region_len
= region
->hi
- offset
;
1633 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1635 /* Cannot read this region. Note that we can end up here only
1636 if the region is explicitly marked inaccessible, or
1637 'inaccessible-by-default' is in effect. */
1638 xfered_total
+= region_len
;
1642 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1643 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1644 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1646 LONGEST xfered_partial
=
1647 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1648 offset
+ xfered_total
, to_read
);
1649 /* Call an observer, notifying them of the xfer progress? */
1650 if (xfered_partial
<= 0)
1652 /* Got an error reading full chunk. See if maybe we can read
1654 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1655 offset
+ xfered_total
+ to_read
,
1656 unit_size
, &result
);
1657 xfered_total
+= to_read
;
1661 result
.emplace_back (offset
+ xfered_total
,
1662 offset
+ xfered_total
+ xfered_partial
,
1663 std::move (buffer
));
1664 xfered_total
+= xfered_partial
;
1674 /* An alternative to target_write with progress callbacks. */
1677 target_write_with_progress (struct target_ops
*ops
,
1678 enum target_object object
,
1679 const char *annex
, const gdb_byte
*buf
,
1680 ULONGEST offset
, LONGEST len
,
1681 void (*progress
) (ULONGEST
, void *), void *baton
)
1683 LONGEST xfered_total
= 0;
1686 /* If we are writing to a memory object, find the length of an addressable
1687 unit for that architecture. */
1688 if (object
== TARGET_OBJECT_MEMORY
1689 || object
== TARGET_OBJECT_STACK_MEMORY
1690 || object
== TARGET_OBJECT_CODE_MEMORY
1691 || object
== TARGET_OBJECT_RAW_MEMORY
)
1692 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1694 /* Give the progress callback a chance to set up. */
1696 (*progress
) (0, baton
);
1698 while (xfered_total
< len
)
1700 ULONGEST xfered_partial
;
1701 enum target_xfer_status status
;
1703 status
= target_write_partial (ops
, object
, annex
,
1704 buf
+ xfered_total
* unit_size
,
1705 offset
+ xfered_total
, len
- xfered_total
,
1708 if (status
!= TARGET_XFER_OK
)
1709 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1712 (*progress
) (xfered_partial
, baton
);
1714 xfered_total
+= xfered_partial
;
1720 /* For docs on target_write see target.h. */
1723 target_write (struct target_ops
*ops
,
1724 enum target_object object
,
1725 const char *annex
, const gdb_byte
*buf
,
1726 ULONGEST offset
, LONGEST len
)
1728 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1732 /* Help for target_read_alloc and target_read_stralloc. See their comments
1735 template <typename T
>
1736 gdb::optional
<gdb::def_vector
<T
>>
1737 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1740 gdb::def_vector
<T
> buf
;
1742 const int chunk
= 4096;
1744 /* This function does not have a length parameter; it reads the
1745 entire OBJECT). Also, it doesn't support objects fetched partly
1746 from one target and partly from another (in a different stratum,
1747 e.g. a core file and an executable). Both reasons make it
1748 unsuitable for reading memory. */
1749 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1751 /* Start by reading up to 4K at a time. The target will throttle
1752 this number down if necessary. */
1755 ULONGEST xfered_len
;
1756 enum target_xfer_status status
;
1758 buf
.resize (buf_pos
+ chunk
);
1760 status
= target_read_partial (ops
, object
, annex
,
1761 (gdb_byte
*) &buf
[buf_pos
],
1765 if (status
== TARGET_XFER_EOF
)
1767 /* Read all there was. */
1768 buf
.resize (buf_pos
);
1771 else if (status
!= TARGET_XFER_OK
)
1773 /* An error occurred. */
1777 buf_pos
+= xfered_len
;
1785 gdb::optional
<gdb::byte_vector
>
1786 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1789 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1794 gdb::optional
<gdb::char_vector
>
1795 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1798 gdb::optional
<gdb::char_vector
> buf
1799 = target_read_alloc_1
<char> (ops
, object
, annex
);
1804 if (buf
->empty () || buf
->back () != '\0')
1805 buf
->push_back ('\0');
1807 /* Check for embedded NUL bytes; but allow trailing NULs. */
1808 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1809 it
!= buf
->end (); it
++)
1812 warning (_("target object %d, annex %s, "
1813 "contained unexpected null characters"),
1814 (int) object
, annex
? annex
: "(none)");
1821 /* Memory transfer methods. */
1824 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1827 /* This method is used to read from an alternate, non-current
1828 target. This read must bypass the overlay support (as symbols
1829 don't match this target), and GDB's internal cache (wrong cache
1830 for this target). */
1831 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1833 memory_error (TARGET_XFER_E_IO
, addr
);
1837 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1838 int len
, enum bfd_endian byte_order
)
1840 gdb_byte buf
[sizeof (ULONGEST
)];
1842 gdb_assert (len
<= sizeof (buf
));
1843 get_target_memory (ops
, addr
, buf
, len
);
1844 return extract_unsigned_integer (buf
, len
, byte_order
);
1850 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1851 struct bp_target_info
*bp_tgt
)
1853 if (!may_insert_breakpoints
)
1855 warning (_("May not insert breakpoints"));
1859 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1865 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1866 struct bp_target_info
*bp_tgt
,
1867 enum remove_bp_reason reason
)
1869 /* This is kind of a weird case to handle, but the permission might
1870 have been changed after breakpoints were inserted - in which case
1871 we should just take the user literally and assume that any
1872 breakpoints should be left in place. */
1873 if (!may_insert_breakpoints
)
1875 warning (_("May not remove breakpoints"));
1879 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1883 info_target_command (const char *args
, int from_tty
)
1885 int has_all_mem
= 0;
1887 if (symfile_objfile
!= NULL
)
1888 printf_unfiltered (_("Symbols from \"%s\".\n"),
1889 objfile_name (symfile_objfile
));
1891 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1893 if (!t
->has_memory ())
1896 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1899 printf_unfiltered (_("\tWhile running this, "
1900 "GDB does not access memory from...\n"));
1901 printf_unfiltered ("%s:\n", t
->longname ());
1903 has_all_mem
= t
->has_all_memory ();
1907 /* This function is called before any new inferior is created, e.g.
1908 by running a program, attaching, or connecting to a target.
1909 It cleans up any state from previous invocations which might
1910 change between runs. This is a subset of what target_preopen
1911 resets (things which might change between targets). */
1914 target_pre_inferior (int from_tty
)
1916 /* Clear out solib state. Otherwise the solib state of the previous
1917 inferior might have survived and is entirely wrong for the new
1918 target. This has been observed on GNU/Linux using glibc 2.3. How
1930 Cannot access memory at address 0xdeadbeef
1933 /* In some OSs, the shared library list is the same/global/shared
1934 across inferiors. If code is shared between processes, so are
1935 memory regions and features. */
1936 if (!gdbarch_has_global_solist (target_gdbarch ()))
1938 no_shared_libraries (NULL
, from_tty
);
1940 invalidate_target_mem_regions ();
1942 target_clear_description ();
1945 /* attach_flag may be set if the previous process associated with
1946 the inferior was attached to. */
1947 current_inferior ()->attach_flag
= 0;
1949 current_inferior ()->highest_thread_num
= 0;
1951 agent_capability_invalidate ();
1954 /* Callback for iterate_over_inferiors. Gets rid of the given
1958 dispose_inferior (struct inferior
*inf
, void *args
)
1960 /* Not all killed inferiors can, or will ever be, removed from the
1961 inferior list. Killed inferiors clearly don't need to be killed
1962 again, so, we're done. */
1966 thread_info
*thread
= any_thread_of_inferior (inf
);
1969 switch_to_thread (thread
);
1971 /* Core inferiors actually should be detached, not killed. */
1972 if (target_has_execution
)
1975 target_detach (inf
, 0);
1981 /* This is to be called by the open routine before it does
1985 target_preopen (int from_tty
)
1989 if (have_inferiors ())
1992 || !have_live_inferiors ()
1993 || query (_("A program is being debugged already. Kill it? ")))
1994 iterate_over_inferiors (dispose_inferior
, NULL
);
1996 error (_("Program not killed."));
1999 /* Calling target_kill may remove the target from the stack. But if
2000 it doesn't (which seems like a win for UDI), remove it now. */
2001 /* Leave the exec target, though. The user may be switching from a
2002 live process to a core of the same program. */
2003 pop_all_targets_above (file_stratum
);
2005 target_pre_inferior (from_tty
);
2011 target_detach (inferior
*inf
, int from_tty
)
2013 /* As long as some to_detach implementations rely on the current_inferior
2014 (either directly, or indirectly, like through target_gdbarch or by
2015 reading memory), INF needs to be the current inferior. When that
2016 requirement will become no longer true, then we can remove this
2018 gdb_assert (inf
== current_inferior ());
2020 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2021 /* Don't remove global breakpoints here. They're removed on
2022 disconnection from the target. */
2025 /* If we're in breakpoints-always-inserted mode, have to remove
2026 breakpoints before detaching. */
2027 remove_breakpoints_inf (current_inferior ());
2029 prepare_for_detach ();
2031 current_top_target ()->detach (inf
, from_tty
);
2033 /* After we have detached, clear the register cache for this inferior. */
2034 ptid_t pid_ptid
= ptid_t (inf
->pid
);
2036 registers_changed_ptid (pid_ptid
);
2038 /* We have to ensure we have no frame cache left. Normally,
2039 registers_changed_ptid (pid_ptid) calls reinit_frame_cache when
2040 inferior_ptid matches pid_ptid, but in our case, it does not
2041 call it, as inferior_ptid has been reset. */
2042 reinit_frame_cache ();
2046 target_disconnect (const char *args
, int from_tty
)
2048 /* If we're in breakpoints-always-inserted mode or if breakpoints
2049 are global across processes, we have to remove them before
2051 remove_breakpoints ();
2053 current_top_target ()->disconnect (args
, from_tty
);
2056 /* See target/target.h. */
2059 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2061 return current_top_target ()->wait (ptid
, status
, options
);
2067 default_target_wait (struct target_ops
*ops
,
2068 ptid_t ptid
, struct target_waitstatus
*status
,
2071 status
->kind
= TARGET_WAITKIND_IGNORE
;
2072 return minus_one_ptid
;
2076 target_pid_to_str (ptid_t ptid
)
2078 return current_top_target ()->pid_to_str (ptid
);
2082 target_thread_name (struct thread_info
*info
)
2084 return current_top_target ()->thread_name (info
);
2087 struct thread_info
*
2088 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2090 struct inferior
*inf
)
2092 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2097 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2099 target_dcache_invalidate ();
2101 current_top_target ()->resume (ptid
, step
, signal
);
2103 registers_changed_ptid (ptid
);
2104 /* We only set the internal executing state here. The user/frontend
2105 running state is set at a higher level. This also clears the
2106 thread's stop_pc as side effect. */
2107 set_executing (ptid
, 1);
2108 clear_inline_frame_state (ptid
);
2111 /* If true, target_commit_resume is a nop. */
2112 static int defer_target_commit_resume
;
2117 target_commit_resume (void)
2119 if (defer_target_commit_resume
)
2122 current_top_target ()->commit_resume ();
2127 scoped_restore_tmpl
<int>
2128 make_scoped_defer_target_commit_resume ()
2130 return make_scoped_restore (&defer_target_commit_resume
, 1);
2134 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2136 current_top_target ()->pass_signals (pass_signals
);
2140 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2142 current_top_target ()->program_signals (program_signals
);
2146 default_follow_fork (struct target_ops
*self
, int follow_child
,
2149 /* Some target returned a fork event, but did not know how to follow it. */
2150 internal_error (__FILE__
, __LINE__
,
2151 _("could not find a target to follow fork"));
2154 /* Look through the list of possible targets for a target that can
2158 target_follow_fork (int follow_child
, int detach_fork
)
2160 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2163 /* Target wrapper for follow exec hook. */
2166 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2168 current_top_target ()->follow_exec (inf
, execd_pathname
);
2172 default_mourn_inferior (struct target_ops
*self
)
2174 internal_error (__FILE__
, __LINE__
,
2175 _("could not find a target to follow mourn inferior"));
2179 target_mourn_inferior (ptid_t ptid
)
2181 gdb_assert (ptid
== inferior_ptid
);
2182 current_top_target ()->mourn_inferior ();
2184 /* We no longer need to keep handles on any of the object files.
2185 Make sure to release them to avoid unnecessarily locking any
2186 of them while we're not actually debugging. */
2187 bfd_cache_close_all ();
2190 /* Look for a target which can describe architectural features, starting
2191 from TARGET. If we find one, return its description. */
2193 const struct target_desc
*
2194 target_read_description (struct target_ops
*target
)
2196 return target
->read_description ();
2199 /* This implements a basic search of memory, reading target memory and
2200 performing the search here (as opposed to performing the search in on the
2201 target side with, for example, gdbserver). */
2204 simple_search_memory (struct target_ops
*ops
,
2205 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2206 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2207 CORE_ADDR
*found_addrp
)
2209 /* NOTE: also defined in find.c testcase. */
2210 #define SEARCH_CHUNK_SIZE 16000
2211 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2212 /* Buffer to hold memory contents for searching. */
2213 unsigned search_buf_size
;
2215 search_buf_size
= chunk_size
+ pattern_len
- 1;
2217 /* No point in trying to allocate a buffer larger than the search space. */
2218 if (search_space_len
< search_buf_size
)
2219 search_buf_size
= search_space_len
;
2221 gdb::byte_vector
search_buf (search_buf_size
);
2223 /* Prime the search buffer. */
2225 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2226 search_buf
.data (), start_addr
, search_buf_size
)
2229 warning (_("Unable to access %s bytes of target "
2230 "memory at %s, halting search."),
2231 pulongest (search_buf_size
), hex_string (start_addr
));
2235 /* Perform the search.
2237 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2238 When we've scanned N bytes we copy the trailing bytes to the start and
2239 read in another N bytes. */
2241 while (search_space_len
>= pattern_len
)
2243 gdb_byte
*found_ptr
;
2244 unsigned nr_search_bytes
2245 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2247 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2248 pattern
, pattern_len
);
2250 if (found_ptr
!= NULL
)
2252 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2254 *found_addrp
= found_addr
;
2258 /* Not found in this chunk, skip to next chunk. */
2260 /* Don't let search_space_len wrap here, it's unsigned. */
2261 if (search_space_len
>= chunk_size
)
2262 search_space_len
-= chunk_size
;
2264 search_space_len
= 0;
2266 if (search_space_len
>= pattern_len
)
2268 unsigned keep_len
= search_buf_size
- chunk_size
;
2269 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2272 /* Copy the trailing part of the previous iteration to the front
2273 of the buffer for the next iteration. */
2274 gdb_assert (keep_len
== pattern_len
- 1);
2275 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2277 nr_to_read
= std::min (search_space_len
- keep_len
,
2278 (ULONGEST
) chunk_size
);
2280 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2281 &search_buf
[keep_len
], read_addr
,
2282 nr_to_read
) != nr_to_read
)
2284 warning (_("Unable to access %s bytes of target "
2285 "memory at %s, halting search."),
2286 plongest (nr_to_read
),
2287 hex_string (read_addr
));
2291 start_addr
+= chunk_size
;
2300 /* Default implementation of memory-searching. */
2303 default_search_memory (struct target_ops
*self
,
2304 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2305 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2306 CORE_ADDR
*found_addrp
)
2308 /* Start over from the top of the target stack. */
2309 return simple_search_memory (current_top_target (),
2310 start_addr
, search_space_len
,
2311 pattern
, pattern_len
, found_addrp
);
2314 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2315 sequence of bytes in PATTERN with length PATTERN_LEN.
2317 The result is 1 if found, 0 if not found, and -1 if there was an error
2318 requiring halting of the search (e.g. memory read error).
2319 If the pattern is found the address is recorded in FOUND_ADDRP. */
2322 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2323 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2324 CORE_ADDR
*found_addrp
)
2326 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2327 pattern
, pattern_len
, found_addrp
);
2330 /* Look through the currently pushed targets. If none of them will
2331 be able to restart the currently running process, issue an error
2335 target_require_runnable (void)
2337 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2339 /* If this target knows how to create a new program, then
2340 assume we will still be able to after killing the current
2341 one. Either killing and mourning will not pop T, or else
2342 find_default_run_target will find it again. */
2343 if (t
->can_create_inferior ())
2346 /* Do not worry about targets at certain strata that can not
2347 create inferiors. Assume they will be pushed again if
2348 necessary, and continue to the process_stratum. */
2349 if (t
->stratum () > process_stratum
)
2352 error (_("The \"%s\" target does not support \"run\". "
2353 "Try \"help target\" or \"continue\"."),
2357 /* This function is only called if the target is running. In that
2358 case there should have been a process_stratum target and it
2359 should either know how to create inferiors, or not... */
2360 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2363 /* Whether GDB is allowed to fall back to the default run target for
2364 "run", "attach", etc. when no target is connected yet. */
2365 static int auto_connect_native_target
= 1;
2368 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2369 struct cmd_list_element
*c
, const char *value
)
2371 fprintf_filtered (file
,
2372 _("Whether GDB may automatically connect to the "
2373 "native target is %s.\n"),
2377 /* A pointer to the target that can respond to "run" or "attach".
2378 Native targets are always singletons and instantiated early at GDB
2380 static target_ops
*the_native_target
;
2385 set_native_target (target_ops
*target
)
2387 if (the_native_target
!= NULL
)
2388 internal_error (__FILE__
, __LINE__
,
2389 _("native target already set (\"%s\")."),
2390 the_native_target
->longname ());
2392 the_native_target
= target
;
2398 get_native_target ()
2400 return the_native_target
;
2403 /* Look through the list of possible targets for a target that can
2404 execute a run or attach command without any other data. This is
2405 used to locate the default process stratum.
2407 If DO_MESG is not NULL, the result is always valid (error() is
2408 called for errors); else, return NULL on error. */
2410 static struct target_ops
*
2411 find_default_run_target (const char *do_mesg
)
2413 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2414 return the_native_target
;
2416 if (do_mesg
!= NULL
)
2417 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2424 find_attach_target (void)
2426 /* If a target on the current stack can attach, use it. */
2427 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2429 if (t
->can_attach ())
2433 /* Otherwise, use the default run target for attaching. */
2434 return find_default_run_target ("attach");
2440 find_run_target (void)
2442 /* If a target on the current stack can run, use it. */
2443 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2445 if (t
->can_create_inferior ())
2449 /* Otherwise, use the default run target. */
2450 return find_default_run_target ("run");
2454 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2459 /* Implement the "info proc" command. */
2462 target_info_proc (const char *args
, enum info_proc_what what
)
2464 struct target_ops
*t
;
2466 /* If we're already connected to something that can get us OS
2467 related data, use it. Otherwise, try using the native
2469 t
= find_target_at (process_stratum
);
2471 t
= find_default_run_target (NULL
);
2473 for (; t
!= NULL
; t
= t
->beneath ())
2475 if (t
->info_proc (args
, what
))
2478 fprintf_unfiltered (gdb_stdlog
,
2479 "target_info_proc (\"%s\", %d)\n", args
, what
);
2489 find_default_supports_disable_randomization (struct target_ops
*self
)
2491 struct target_ops
*t
;
2493 t
= find_default_run_target (NULL
);
2495 return t
->supports_disable_randomization ();
2500 target_supports_disable_randomization (void)
2502 return current_top_target ()->supports_disable_randomization ();
2505 /* See target/target.h. */
2508 target_supports_multi_process (void)
2510 return current_top_target ()->supports_multi_process ();
2515 gdb::optional
<gdb::char_vector
>
2516 target_get_osdata (const char *type
)
2518 struct target_ops
*t
;
2520 /* If we're already connected to something that can get us OS
2521 related data, use it. Otherwise, try using the native
2523 t
= find_target_at (process_stratum
);
2525 t
= find_default_run_target ("get OS data");
2530 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2534 /* Determine the current address space of thread PTID. */
2536 struct address_space
*
2537 target_thread_address_space (ptid_t ptid
)
2539 struct address_space
*aspace
;
2541 aspace
= current_top_target ()->thread_address_space (ptid
);
2542 gdb_assert (aspace
!= NULL
);
2550 target_ops::beneath () const
2552 return g_target_stack
.find_beneath (this);
2556 target_ops::close ()
2561 target_ops::can_attach ()
2567 target_ops::attach (const char *, int)
2569 gdb_assert_not_reached ("target_ops::attach called");
2573 target_ops::can_create_inferior ()
2579 target_ops::create_inferior (const char *, const std::string
&,
2582 gdb_assert_not_reached ("target_ops::create_inferior called");
2586 target_ops::can_run ()
2594 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2603 /* Target file operations. */
2605 static struct target_ops
*
2606 default_fileio_target (void)
2608 struct target_ops
*t
;
2610 /* If we're already connected to something that can perform
2611 file I/O, use it. Otherwise, try using the native target. */
2612 t
= find_target_at (process_stratum
);
2615 return find_default_run_target ("file I/O");
2618 /* File handle for target file operations. */
2622 /* The target on which this file is open. NULL if the target is
2623 meanwhile closed while the handle is open. */
2626 /* The file descriptor on the target. */
2629 /* Check whether this fileio_fh_t represents a closed file. */
2632 return target_fd
< 0;
2636 /* Vector of currently open file handles. The value returned by
2637 target_fileio_open and passed as the FD argument to other
2638 target_fileio_* functions is an index into this vector. This
2639 vector's entries are never freed; instead, files are marked as
2640 closed, and the handle becomes available for reuse. */
2641 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2643 /* Index into fileio_fhandles of the lowest handle that might be
2644 closed. This permits handle reuse without searching the whole
2645 list each time a new file is opened. */
2646 static int lowest_closed_fd
;
2648 /* Invalidate the target associated with open handles that were open
2649 on target TARG, since we're about to close (and maybe destroy) the
2650 target. The handles remain open from the client's perspective, but
2651 trying to do anything with them other than closing them will fail
2655 fileio_handles_invalidate_target (target_ops
*targ
)
2657 for (fileio_fh_t
&fh
: fileio_fhandles
)
2658 if (fh
.target
== targ
)
2662 /* Acquire a target fileio file descriptor. */
2665 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2667 /* Search for closed handles to reuse. */
2668 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2670 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2672 if (fh
.is_closed ())
2676 /* Push a new handle if no closed handles were found. */
2677 if (lowest_closed_fd
== fileio_fhandles
.size ())
2678 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2680 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2682 /* Should no longer be marked closed. */
2683 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2685 /* Return its index, and start the next lookup at
2687 return lowest_closed_fd
++;
2690 /* Release a target fileio file descriptor. */
2693 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2696 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2699 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2701 static fileio_fh_t
*
2702 fileio_fd_to_fh (int fd
)
2704 return &fileio_fhandles
[fd
];
2708 /* Default implementations of file i/o methods. We don't want these
2709 to delegate automatically, because we need to know which target
2710 supported the method, in order to call it directly from within
2711 pread/pwrite, etc. */
2714 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2715 int flags
, int mode
, int warn_if_slow
,
2718 *target_errno
= FILEIO_ENOSYS
;
2723 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2724 ULONGEST offset
, int *target_errno
)
2726 *target_errno
= FILEIO_ENOSYS
;
2731 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2732 ULONGEST offset
, int *target_errno
)
2734 *target_errno
= FILEIO_ENOSYS
;
2739 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2741 *target_errno
= FILEIO_ENOSYS
;
2746 target_ops::fileio_close (int fd
, int *target_errno
)
2748 *target_errno
= FILEIO_ENOSYS
;
2753 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2756 *target_errno
= FILEIO_ENOSYS
;
2760 gdb::optional
<std::string
>
2761 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2764 *target_errno
= FILEIO_ENOSYS
;
2768 /* Helper for target_fileio_open and
2769 target_fileio_open_warn_if_slow. */
2772 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2773 int flags
, int mode
, int warn_if_slow
,
2776 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2778 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2779 warn_if_slow
, target_errno
);
2781 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2787 fd
= acquire_fileio_fd (t
, fd
);
2790 fprintf_unfiltered (gdb_stdlog
,
2791 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2793 inf
== NULL
? 0 : inf
->num
,
2794 filename
, flags
, mode
,
2796 fd
!= -1 ? 0 : *target_errno
);
2800 *target_errno
= FILEIO_ENOSYS
;
2807 target_fileio_open (struct inferior
*inf
, const char *filename
,
2808 int flags
, int mode
, int *target_errno
)
2810 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2817 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2818 const char *filename
,
2819 int flags
, int mode
, int *target_errno
)
2821 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2828 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2829 ULONGEST offset
, int *target_errno
)
2831 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2834 if (fh
->is_closed ())
2835 *target_errno
= EBADF
;
2836 else if (fh
->target
== NULL
)
2837 *target_errno
= EIO
;
2839 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2840 len
, offset
, target_errno
);
2843 fprintf_unfiltered (gdb_stdlog
,
2844 "target_fileio_pwrite (%d,...,%d,%s) "
2846 fd
, len
, pulongest (offset
),
2847 ret
, ret
!= -1 ? 0 : *target_errno
);
2854 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2855 ULONGEST offset
, int *target_errno
)
2857 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2860 if (fh
->is_closed ())
2861 *target_errno
= EBADF
;
2862 else if (fh
->target
== NULL
)
2863 *target_errno
= EIO
;
2865 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2866 len
, offset
, target_errno
);
2869 fprintf_unfiltered (gdb_stdlog
,
2870 "target_fileio_pread (%d,...,%d,%s) "
2872 fd
, len
, pulongest (offset
),
2873 ret
, ret
!= -1 ? 0 : *target_errno
);
2880 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2882 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2885 if (fh
->is_closed ())
2886 *target_errno
= EBADF
;
2887 else if (fh
->target
== NULL
)
2888 *target_errno
= EIO
;
2890 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2893 fprintf_unfiltered (gdb_stdlog
,
2894 "target_fileio_fstat (%d) = %d (%d)\n",
2895 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2902 target_fileio_close (int fd
, int *target_errno
)
2904 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2907 if (fh
->is_closed ())
2908 *target_errno
= EBADF
;
2911 if (fh
->target
!= NULL
)
2912 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2916 release_fileio_fd (fd
, fh
);
2920 fprintf_unfiltered (gdb_stdlog
,
2921 "target_fileio_close (%d) = %d (%d)\n",
2922 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2929 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2932 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2934 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2936 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2940 fprintf_unfiltered (gdb_stdlog
,
2941 "target_fileio_unlink (%d,%s)"
2943 inf
== NULL
? 0 : inf
->num
, filename
,
2944 ret
, ret
!= -1 ? 0 : *target_errno
);
2948 *target_errno
= FILEIO_ENOSYS
;
2954 gdb::optional
<std::string
>
2955 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2958 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2960 gdb::optional
<std::string
> ret
2961 = t
->fileio_readlink (inf
, filename
, target_errno
);
2963 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2967 fprintf_unfiltered (gdb_stdlog
,
2968 "target_fileio_readlink (%d,%s)"
2970 inf
== NULL
? 0 : inf
->num
,
2971 filename
, ret
? ret
->c_str () : "(nil)",
2972 ret
? 0 : *target_errno
);
2976 *target_errno
= FILEIO_ENOSYS
;
2980 /* Like scoped_fd, but specific to target fileio. */
2982 class scoped_target_fd
2985 explicit scoped_target_fd (int fd
) noexcept
2990 ~scoped_target_fd ()
2996 target_fileio_close (m_fd
, &target_errno
);
3000 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3002 int get () const noexcept
3011 /* Read target file FILENAME, in the filesystem as seen by INF. If
3012 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3013 remote targets, the remote stub). Store the result in *BUF_P and
3014 return the size of the transferred data. PADDING additional bytes
3015 are available in *BUF_P. This is a helper function for
3016 target_fileio_read_alloc; see the declaration of that function for
3017 more information. */
3020 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3021 gdb_byte
**buf_p
, int padding
)
3023 size_t buf_alloc
, buf_pos
;
3028 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3029 0700, &target_errno
));
3030 if (fd
.get () == -1)
3033 /* Start by reading up to 4K at a time. The target will throttle
3034 this number down if necessary. */
3036 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3040 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3041 buf_alloc
- buf_pos
- padding
, buf_pos
,
3045 /* An error occurred. */
3051 /* Read all there was. */
3061 /* If the buffer is filling up, expand it. */
3062 if (buf_alloc
< buf_pos
* 2)
3065 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3075 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3078 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3083 gdb::unique_xmalloc_ptr
<char>
3084 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3088 LONGEST i
, transferred
;
3090 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3091 bufstr
= (char *) buffer
;
3093 if (transferred
< 0)
3094 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3096 if (transferred
== 0)
3097 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
3099 bufstr
[transferred
] = 0;
3101 /* Check for embedded NUL bytes; but allow trailing NULs. */
3102 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3105 warning (_("target file %s "
3106 "contained unexpected null characters"),
3111 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3116 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3117 CORE_ADDR addr
, int len
)
3119 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3123 default_watchpoint_addr_within_range (struct target_ops
*target
,
3125 CORE_ADDR start
, int length
)
3127 return addr
>= start
&& addr
< start
+ length
;
3133 target_stack::find_beneath (const target_ops
*t
) const
3135 /* Look for a non-empty slot at stratum levels beneath T's. */
3136 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3137 if (m_stack
[stratum
] != NULL
)
3138 return m_stack
[stratum
];
3146 find_target_at (enum strata stratum
)
3148 return g_target_stack
.at (stratum
);
3156 target_announce_detach (int from_tty
)
3159 const char *exec_file
;
3164 exec_file
= get_exec_file (0);
3165 if (exec_file
== NULL
)
3168 pid
= inferior_ptid
.pid ();
3169 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3170 target_pid_to_str (ptid_t (pid
)));
3173 /* The inferior process has died. Long live the inferior! */
3176 generic_mourn_inferior (void)
3178 inferior
*inf
= current_inferior ();
3180 inferior_ptid
= null_ptid
;
3182 /* Mark breakpoints uninserted in case something tries to delete a
3183 breakpoint while we delete the inferior's threads (which would
3184 fail, since the inferior is long gone). */
3185 mark_breakpoints_out ();
3188 exit_inferior (inf
);
3190 /* Note this wipes step-resume breakpoints, so needs to be done
3191 after exit_inferior, which ends up referencing the step-resume
3192 breakpoints through clear_thread_inferior_resources. */
3193 breakpoint_init_inferior (inf_exited
);
3195 registers_changed ();
3197 reopen_exec_file ();
3198 reinit_frame_cache ();
3200 if (deprecated_detach_hook
)
3201 deprecated_detach_hook ();
3204 /* Convert a normal process ID to a string. Returns the string in a
3208 normal_pid_to_str (ptid_t ptid
)
3210 static char buf
[32];
3212 xsnprintf (buf
, sizeof buf
, "process %d", ptid
.pid ());
3217 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3219 return normal_pid_to_str (ptid
);
3222 /* Error-catcher for target_find_memory_regions. */
3224 dummy_find_memory_regions (struct target_ops
*self
,
3225 find_memory_region_ftype ignore1
, void *ignore2
)
3227 error (_("Command not implemented for this target."));
3231 /* Error-catcher for target_make_corefile_notes. */
3233 dummy_make_corefile_notes (struct target_ops
*self
,
3234 bfd
*ignore1
, int *ignore2
)
3236 error (_("Command not implemented for this target."));
3240 #include "target-delegates.c"
3243 static const target_info dummy_target_info
= {
3250 dummy_target::stratum () const
3252 return dummy_stratum
;
3256 debug_target::stratum () const
3258 return debug_stratum
;
3262 dummy_target::info () const
3264 return dummy_target_info
;
3268 debug_target::info () const
3270 return beneath ()->info ();
3276 target_close (struct target_ops
*targ
)
3278 gdb_assert (!target_is_pushed (targ
));
3280 fileio_handles_invalidate_target (targ
);
3285 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3289 target_thread_alive (ptid_t ptid
)
3291 return current_top_target ()->thread_alive (ptid
);
3295 target_update_thread_list (void)
3297 current_top_target ()->update_thread_list ();
3301 target_stop (ptid_t ptid
)
3305 warning (_("May not interrupt or stop the target, ignoring attempt"));
3309 current_top_target ()->stop (ptid
);
3317 warning (_("May not interrupt or stop the target, ignoring attempt"));
3321 current_top_target ()->interrupt ();
3327 target_pass_ctrlc (void)
3329 current_top_target ()->pass_ctrlc ();
3335 default_target_pass_ctrlc (struct target_ops
*ops
)
3337 target_interrupt ();
3340 /* See target/target.h. */
3343 target_stop_and_wait (ptid_t ptid
)
3345 struct target_waitstatus status
;
3346 int was_non_stop
= non_stop
;
3351 memset (&status
, 0, sizeof (status
));
3352 target_wait (ptid
, &status
, 0);
3354 non_stop
= was_non_stop
;
3357 /* See target/target.h. */
3360 target_continue_no_signal (ptid_t ptid
)
3362 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3365 /* See target/target.h. */
3368 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3370 target_resume (ptid
, 0, signal
);
3373 /* Concatenate ELEM to LIST, a comma-separated list. */
3376 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3378 if (!list
->empty ())
3379 list
->append (", ");
3381 list
->append (elem
);
3384 /* Helper for target_options_to_string. If OPT is present in
3385 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3386 OPT is removed from TARGET_OPTIONS. */
3389 do_option (int *target_options
, std::string
*ret
,
3390 int opt
, const char *opt_str
)
3392 if ((*target_options
& opt
) != 0)
3394 str_comma_list_concat_elem (ret
, opt_str
);
3395 *target_options
&= ~opt
;
3402 target_options_to_string (int target_options
)
3406 #define DO_TARG_OPTION(OPT) \
3407 do_option (&target_options, &ret, OPT, #OPT)
3409 DO_TARG_OPTION (TARGET_WNOHANG
);
3411 if (target_options
!= 0)
3412 str_comma_list_concat_elem (&ret
, "unknown???");
3418 target_fetch_registers (struct regcache
*regcache
, int regno
)
3420 current_top_target ()->fetch_registers (regcache
, regno
);
3422 regcache
->debug_print_register ("target_fetch_registers", regno
);
3426 target_store_registers (struct regcache
*regcache
, int regno
)
3428 if (!may_write_registers
)
3429 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3431 current_top_target ()->store_registers (regcache
, regno
);
3434 regcache
->debug_print_register ("target_store_registers", regno
);
3439 target_core_of_thread (ptid_t ptid
)
3441 return current_top_target ()->core_of_thread (ptid
);
3445 simple_verify_memory (struct target_ops
*ops
,
3446 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3448 LONGEST total_xfered
= 0;
3450 while (total_xfered
< size
)
3452 ULONGEST xfered_len
;
3453 enum target_xfer_status status
;
3455 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3457 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3458 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3460 if (status
== TARGET_XFER_OK
3461 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3463 total_xfered
+= xfered_len
;
3472 /* Default implementation of memory verification. */
3475 default_verify_memory (struct target_ops
*self
,
3476 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3478 /* Start over from the top of the target stack. */
3479 return simple_verify_memory (current_top_target (),
3480 data
, memaddr
, size
);
3484 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3486 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3489 /* The documentation for this function is in its prototype declaration in
3493 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3494 enum target_hw_bp_type rw
)
3496 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3499 /* The documentation for this function is in its prototype declaration in
3503 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3504 enum target_hw_bp_type rw
)
3506 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3509 /* The documentation for this function is in its prototype declaration
3513 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3515 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3518 /* The documentation for this function is in its prototype declaration
3522 target_ranged_break_num_registers (void)
3524 return current_top_target ()->ranged_break_num_registers ();
3529 struct btrace_target_info
*
3530 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3532 return current_top_target ()->enable_btrace (ptid
, conf
);
3538 target_disable_btrace (struct btrace_target_info
*btinfo
)
3540 current_top_target ()->disable_btrace (btinfo
);
3546 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3548 current_top_target ()->teardown_btrace (btinfo
);
3554 target_read_btrace (struct btrace_data
*btrace
,
3555 struct btrace_target_info
*btinfo
,
3556 enum btrace_read_type type
)
3558 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3563 const struct btrace_config
*
3564 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3566 return current_top_target ()->btrace_conf (btinfo
);
3572 target_stop_recording (void)
3574 current_top_target ()->stop_recording ();
3580 target_save_record (const char *filename
)
3582 current_top_target ()->save_record (filename
);
3588 target_supports_delete_record ()
3590 return current_top_target ()->supports_delete_record ();
3596 target_delete_record (void)
3598 current_top_target ()->delete_record ();
3604 target_record_method (ptid_t ptid
)
3606 return current_top_target ()->record_method (ptid
);
3612 target_record_is_replaying (ptid_t ptid
)
3614 return current_top_target ()->record_is_replaying (ptid
);
3620 target_record_will_replay (ptid_t ptid
, int dir
)
3622 return current_top_target ()->record_will_replay (ptid
, dir
);
3628 target_record_stop_replaying (void)
3630 current_top_target ()->record_stop_replaying ();
3636 target_goto_record_begin (void)
3638 current_top_target ()->goto_record_begin ();
3644 target_goto_record_end (void)
3646 current_top_target ()->goto_record_end ();
3652 target_goto_record (ULONGEST insn
)
3654 current_top_target ()->goto_record (insn
);
3660 target_insn_history (int size
, gdb_disassembly_flags flags
)
3662 current_top_target ()->insn_history (size
, flags
);
3668 target_insn_history_from (ULONGEST from
, int size
,
3669 gdb_disassembly_flags flags
)
3671 current_top_target ()->insn_history_from (from
, size
, flags
);
3677 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3678 gdb_disassembly_flags flags
)
3680 current_top_target ()->insn_history_range (begin
, end
, flags
);
3686 target_call_history (int size
, record_print_flags flags
)
3688 current_top_target ()->call_history (size
, flags
);
3694 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3696 current_top_target ()->call_history_from (begin
, size
, flags
);
3702 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3704 current_top_target ()->call_history_range (begin
, end
, flags
);
3709 const struct frame_unwind
*
3710 target_get_unwinder (void)
3712 return current_top_target ()->get_unwinder ();
3717 const struct frame_unwind
*
3718 target_get_tailcall_unwinder (void)
3720 return current_top_target ()->get_tailcall_unwinder ();
3726 target_prepare_to_generate_core (void)
3728 current_top_target ()->prepare_to_generate_core ();
3734 target_done_generating_core (void)
3736 current_top_target ()->done_generating_core ();
3741 static char targ_desc
[] =
3742 "Names of targets and files being debugged.\nShows the entire \
3743 stack of targets currently in use (including the exec-file,\n\
3744 core-file, and process, if any), as well as the symbol file name.";
3747 default_rcmd (struct target_ops
*self
, const char *command
,
3748 struct ui_file
*output
)
3750 error (_("\"monitor\" command not supported by this target."));
3754 do_monitor_command (const char *cmd
, int from_tty
)
3756 target_rcmd (cmd
, gdb_stdtarg
);
3759 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3763 flash_erase_command (const char *cmd
, int from_tty
)
3765 /* Used to communicate termination of flash operations to the target. */
3766 bool found_flash_region
= false;
3767 struct gdbarch
*gdbarch
= target_gdbarch ();
3769 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3771 /* Iterate over all memory regions. */
3772 for (const mem_region
&m
: mem_regions
)
3774 /* Is this a flash memory region? */
3775 if (m
.attrib
.mode
== MEM_FLASH
)
3777 found_flash_region
= true;
3778 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3780 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3782 current_uiout
->message (_("Erasing flash memory region at address "));
3783 current_uiout
->field_fmt ("address", "%s", paddress (gdbarch
, m
.lo
));
3784 current_uiout
->message (", size = ");
3785 current_uiout
->field_fmt ("size", "%s", hex_string (m
.hi
- m
.lo
));
3786 current_uiout
->message ("\n");
3790 /* Did we do any flash operations? If so, we need to finalize them. */
3791 if (found_flash_region
)
3792 target_flash_done ();
3794 current_uiout
->message (_("No flash memory regions found.\n"));
3797 /* Print the name of each layers of our target stack. */
3800 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3802 printf_filtered (_("The current target stack is:\n"));
3804 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3806 if (t
->stratum () == debug_stratum
)
3808 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3815 target_async (int enable
)
3817 infrun_async (enable
);
3818 current_top_target ()->async (enable
);
3824 target_thread_events (int enable
)
3826 current_top_target ()->thread_events (enable
);
3829 /* Controls if targets can report that they can/are async. This is
3830 just for maintainers to use when debugging gdb. */
3831 int target_async_permitted
= 1;
3833 /* The set command writes to this variable. If the inferior is
3834 executing, target_async_permitted is *not* updated. */
3835 static int target_async_permitted_1
= 1;
3838 maint_set_target_async_command (const char *args
, int from_tty
,
3839 struct cmd_list_element
*c
)
3841 if (have_live_inferiors ())
3843 target_async_permitted_1
= target_async_permitted
;
3844 error (_("Cannot change this setting while the inferior is running."));
3847 target_async_permitted
= target_async_permitted_1
;
3851 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3852 struct cmd_list_element
*c
,
3855 fprintf_filtered (file
,
3856 _("Controlling the inferior in "
3857 "asynchronous mode is %s.\n"), value
);
3860 /* Return true if the target operates in non-stop mode even with "set
3864 target_always_non_stop_p (void)
3866 return current_top_target ()->always_non_stop_p ();
3872 target_is_non_stop_p (void)
3875 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3876 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3877 && target_always_non_stop_p ()));
3880 /* Controls if targets can report that they always run in non-stop
3881 mode. This is just for maintainers to use when debugging gdb. */
3882 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3884 /* The set command writes to this variable. If the inferior is
3885 executing, target_non_stop_enabled is *not* updated. */
3886 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3888 /* Implementation of "maint set target-non-stop". */
3891 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3892 struct cmd_list_element
*c
)
3894 if (have_live_inferiors ())
3896 target_non_stop_enabled_1
= target_non_stop_enabled
;
3897 error (_("Cannot change this setting while the inferior is running."));
3900 target_non_stop_enabled
= target_non_stop_enabled_1
;
3903 /* Implementation of "maint show target-non-stop". */
3906 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3907 struct cmd_list_element
*c
,
3910 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3911 fprintf_filtered (file
,
3912 _("Whether the target is always in non-stop mode "
3913 "is %s (currently %s).\n"), value
,
3914 target_always_non_stop_p () ? "on" : "off");
3916 fprintf_filtered (file
,
3917 _("Whether the target is always in non-stop mode "
3918 "is %s.\n"), value
);
3921 /* Temporary copies of permission settings. */
3923 static int may_write_registers_1
= 1;
3924 static int may_write_memory_1
= 1;
3925 static int may_insert_breakpoints_1
= 1;
3926 static int may_insert_tracepoints_1
= 1;
3927 static int may_insert_fast_tracepoints_1
= 1;
3928 static int may_stop_1
= 1;
3930 /* Make the user-set values match the real values again. */
3933 update_target_permissions (void)
3935 may_write_registers_1
= may_write_registers
;
3936 may_write_memory_1
= may_write_memory
;
3937 may_insert_breakpoints_1
= may_insert_breakpoints
;
3938 may_insert_tracepoints_1
= may_insert_tracepoints
;
3939 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3940 may_stop_1
= may_stop
;
3943 /* The one function handles (most of) the permission flags in the same
3947 set_target_permissions (const char *args
, int from_tty
,
3948 struct cmd_list_element
*c
)
3950 if (target_has_execution
)
3952 update_target_permissions ();
3953 error (_("Cannot change this setting while the inferior is running."));
3956 /* Make the real values match the user-changed values. */
3957 may_write_registers
= may_write_registers_1
;
3958 may_insert_breakpoints
= may_insert_breakpoints_1
;
3959 may_insert_tracepoints
= may_insert_tracepoints_1
;
3960 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3961 may_stop
= may_stop_1
;
3962 update_observer_mode ();
3965 /* Set memory write permission independently of observer mode. */
3968 set_write_memory_permission (const char *args
, int from_tty
,
3969 struct cmd_list_element
*c
)
3971 /* Make the real values match the user-changed values. */
3972 may_write_memory
= may_write_memory_1
;
3973 update_observer_mode ();
3977 initialize_targets (void)
3979 the_dummy_target
= new dummy_target ();
3980 push_target (the_dummy_target
);
3982 the_debug_target
= new debug_target ();
3984 add_info ("target", info_target_command
, targ_desc
);
3985 add_info ("files", info_target_command
, targ_desc
);
3987 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3988 Set target debugging."), _("\
3989 Show target debugging."), _("\
3990 When non-zero, target debugging is enabled. Higher numbers are more\n\
3994 &setdebuglist
, &showdebuglist
);
3996 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3997 &trust_readonly
, _("\
3998 Set mode for reading from readonly sections."), _("\
3999 Show mode for reading from readonly sections."), _("\
4000 When this mode is on, memory reads from readonly sections (such as .text)\n\
4001 will be read from the object file instead of from the target. This will\n\
4002 result in significant performance improvement for remote targets."),
4004 show_trust_readonly
,
4005 &setlist
, &showlist
);
4007 add_com ("monitor", class_obscure
, do_monitor_command
,
4008 _("Send a command to the remote monitor (remote targets only)."));
4010 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4011 _("Print the name of each layer of the internal target stack."),
4012 &maintenanceprintlist
);
4014 add_setshow_boolean_cmd ("target-async", no_class
,
4015 &target_async_permitted_1
, _("\
4016 Set whether gdb controls the inferior in asynchronous mode."), _("\
4017 Show whether gdb controls the inferior in asynchronous mode."), _("\
4018 Tells gdb whether to control the inferior in asynchronous mode."),
4019 maint_set_target_async_command
,
4020 maint_show_target_async_command
,
4021 &maintenance_set_cmdlist
,
4022 &maintenance_show_cmdlist
);
4024 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4025 &target_non_stop_enabled_1
, _("\
4026 Set whether gdb always controls the inferior in non-stop mode."), _("\
4027 Show whether gdb always controls the inferior in non-stop mode."), _("\
4028 Tells gdb whether to control the inferior in non-stop mode."),
4029 maint_set_target_non_stop_command
,
4030 maint_show_target_non_stop_command
,
4031 &maintenance_set_cmdlist
,
4032 &maintenance_show_cmdlist
);
4034 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4035 &may_write_registers_1
, _("\
4036 Set permission to write into registers."), _("\
4037 Show permission to write into registers."), _("\
4038 When this permission is on, GDB may write into the target's registers.\n\
4039 Otherwise, any sort of write attempt will result in an error."),
4040 set_target_permissions
, NULL
,
4041 &setlist
, &showlist
);
4043 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4044 &may_write_memory_1
, _("\
4045 Set permission to write into target memory."), _("\
4046 Show permission to write into target memory."), _("\
4047 When this permission is on, GDB may write into the target's memory.\n\
4048 Otherwise, any sort of write attempt will result in an error."),
4049 set_write_memory_permission
, NULL
,
4050 &setlist
, &showlist
);
4052 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4053 &may_insert_breakpoints_1
, _("\
4054 Set permission to insert breakpoints in the target."), _("\
4055 Show permission to insert breakpoints in the target."), _("\
4056 When this permission is on, GDB may insert breakpoints in the program.\n\
4057 Otherwise, any sort of insertion attempt will result in an error."),
4058 set_target_permissions
, NULL
,
4059 &setlist
, &showlist
);
4061 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4062 &may_insert_tracepoints_1
, _("\
4063 Set permission to insert tracepoints in the target."), _("\
4064 Show permission to insert tracepoints in the target."), _("\
4065 When this permission is on, GDB may insert tracepoints in the program.\n\
4066 Otherwise, any sort of insertion attempt will result in an error."),
4067 set_target_permissions
, NULL
,
4068 &setlist
, &showlist
);
4070 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4071 &may_insert_fast_tracepoints_1
, _("\
4072 Set permission to insert fast tracepoints in the target."), _("\
4073 Show permission to insert fast tracepoints in the target."), _("\
4074 When this permission is on, GDB may insert fast tracepoints.\n\
4075 Otherwise, any sort of insertion attempt will result in an error."),
4076 set_target_permissions
, NULL
,
4077 &setlist
, &showlist
);
4079 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4081 Set permission to interrupt or signal the target."), _("\
4082 Show permission to interrupt or signal the target."), _("\
4083 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4084 Otherwise, any attempt to interrupt or stop will be ignored."),
4085 set_target_permissions
, NULL
,
4086 &setlist
, &showlist
);
4088 add_com ("flash-erase", no_class
, flash_erase_command
,
4089 _("Erase all flash memory regions."));
4091 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4092 &auto_connect_native_target
, _("\
4093 Set whether GDB may automatically connect to the native target."), _("\
4094 Show whether GDB may automatically connect to the native target."), _("\
4095 When on, and GDB is not connected to a target yet, GDB\n\
4096 attempts \"run\" and other commands with the native target."),
4097 NULL
, show_auto_connect_native_target
,
4098 &setlist
, &showlist
);