1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2020 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
43 #include "gdbsupport/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "gdbsupport/byte-vector.h"
51 #include <unordered_map>
52 #include "target-connection.h"
55 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
57 static void default_terminal_info (struct target_ops
*, const char *, int);
59 static int default_watchpoint_addr_within_range (struct target_ops
*,
60 CORE_ADDR
, CORE_ADDR
, int);
62 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
65 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
67 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
70 static void default_mourn_inferior (struct target_ops
*self
);
72 static int default_search_memory (struct target_ops
*ops
,
74 ULONGEST search_space_len
,
75 const gdb_byte
*pattern
,
77 CORE_ADDR
*found_addrp
);
79 static int default_verify_memory (struct target_ops
*self
,
81 CORE_ADDR memaddr
, ULONGEST size
);
83 static void tcomplain (void) ATTRIBUTE_NORETURN
;
85 static struct target_ops
*find_default_run_target (const char *);
87 static int dummy_find_memory_regions (struct target_ops
*self
,
88 find_memory_region_ftype ignore1
,
91 static char *dummy_make_corefile_notes (struct target_ops
*self
,
92 bfd
*ignore1
, int *ignore2
);
94 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
96 static enum exec_direction_kind default_execution_direction
97 (struct target_ops
*self
);
99 /* Mapping between target_info objects (which have address identity)
100 and corresponding open/factory function/callback. Each add_target
101 call adds one entry to this map, and registers a "target
102 TARGET_NAME" command that when invoked calls the factory registered
103 here. The target_info object is associated with the command via
104 the command's context. */
105 static std::unordered_map
<const target_info
*, target_open_ftype
*>
108 /* The singleton debug target. */
110 static struct target_ops
*the_debug_target
;
112 /* Top of target stack. */
113 /* The target structure we are currently using to talk to a process
114 or file or whatever "inferior" we have. */
117 current_top_target ()
119 return current_inferior ()->top_target ();
122 /* Command list for target. */
124 static struct cmd_list_element
*targetlist
= NULL
;
126 /* True if we should trust readonly sections from the
127 executable when reading memory. */
129 static bool trust_readonly
= false;
131 /* Nonzero if we should show true memory content including
132 memory breakpoint inserted by gdb. */
134 static int show_memory_breakpoints
= 0;
136 /* These globals control whether GDB attempts to perform these
137 operations; they are useful for targets that need to prevent
138 inadvertent disruption, such as in non-stop mode. */
140 bool may_write_registers
= true;
142 bool may_write_memory
= true;
144 bool may_insert_breakpoints
= true;
146 bool may_insert_tracepoints
= true;
148 bool may_insert_fast_tracepoints
= true;
150 bool may_stop
= true;
152 /* Non-zero if we want to see trace of target level stuff. */
154 static unsigned int targetdebug
= 0;
157 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
160 push_target (the_debug_target
);
162 unpush_target (the_debug_target
);
166 show_targetdebug (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
175 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
176 if (t
->has_memory ())
185 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
193 target_has_registers ()
195 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
196 if (t
->has_registers ())
203 target_has_execution (inferior
*inf
)
206 inf
= current_inferior ();
208 for (target_ops
*t
= inf
->top_target ();
210 t
= inf
->find_target_beneath (t
))
211 if (t
->has_execution (inf
))
217 /* This is used to implement the various target commands. */
220 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
222 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
223 target_open_ftype
*func
= target_factories
[ti
];
226 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
229 func (args
, from_tty
);
232 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
233 ti
->shortname
, args
, from_tty
);
239 add_target (const target_info
&t
, target_open_ftype
*func
,
240 completer_ftype
*completer
)
242 struct cmd_list_element
*c
;
244 auto &func_slot
= target_factories
[&t
];
245 if (func_slot
!= nullptr)
246 internal_error (__FILE__
, __LINE__
,
247 _("target already added (\"%s\")."), t
.shortname
);
250 if (targetlist
== NULL
)
251 add_basic_prefix_cmd ("target", class_run
, _("\
252 Connect to a target machine or process.\n\
253 The first argument is the type or protocol of the target machine.\n\
254 Remaining arguments are interpreted by the target protocol. For more\n\
255 information on the arguments for a particular protocol, type\n\
256 `help target ' followed by the protocol name."),
257 &targetlist
, "target ", 0, &cmdlist
);
258 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
259 set_cmd_context (c
, (void *) &t
);
260 set_cmd_sfunc (c
, open_target
);
261 if (completer
!= NULL
)
262 set_cmd_completer (c
, completer
);
268 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
270 struct cmd_list_element
*c
;
273 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
275 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
276 set_cmd_sfunc (c
, open_target
);
277 set_cmd_context (c
, (void *) &tinfo
);
278 alt
= xstrprintf ("target %s", tinfo
.shortname
);
279 deprecate_cmd (c
, alt
);
287 current_top_target ()->kill ();
291 target_load (const char *arg
, int from_tty
)
293 target_dcache_invalidate ();
294 current_top_target ()->load (arg
, from_tty
);
299 target_terminal_state
target_terminal::m_terminal_state
300 = target_terminal_state::is_ours
;
302 /* See target/target.h. */
305 target_terminal::init (void)
307 current_top_target ()->terminal_init ();
309 m_terminal_state
= target_terminal_state::is_ours
;
312 /* See target/target.h. */
315 target_terminal::inferior (void)
317 struct ui
*ui
= current_ui
;
319 /* A background resume (``run&'') should leave GDB in control of the
321 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
324 /* Since we always run the inferior in the main console (unless "set
325 inferior-tty" is in effect), when some UI other than the main one
326 calls target_terminal::inferior, then we leave the main UI's
327 terminal settings as is. */
331 /* If GDB is resuming the inferior in the foreground, install
332 inferior's terminal modes. */
334 struct inferior
*inf
= current_inferior ();
336 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
338 current_top_target ()->terminal_inferior ();
339 inf
->terminal_state
= target_terminal_state::is_inferior
;
342 m_terminal_state
= target_terminal_state::is_inferior
;
344 /* If the user hit C-c before, pretend that it was hit right
346 if (check_quit_flag ())
347 target_pass_ctrlc ();
350 /* See target/target.h. */
353 target_terminal::restore_inferior (void)
355 struct ui
*ui
= current_ui
;
357 /* See target_terminal::inferior(). */
358 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
361 /* Restore the terminal settings of inferiors that were in the
362 foreground but are now ours_for_output due to a temporary
363 target_target::ours_for_output() call. */
366 scoped_restore_current_inferior restore_inferior
;
368 for (::inferior
*inf
: all_inferiors ())
370 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
372 set_current_inferior (inf
);
373 current_top_target ()->terminal_inferior ();
374 inf
->terminal_state
= target_terminal_state::is_inferior
;
379 m_terminal_state
= target_terminal_state::is_inferior
;
381 /* If the user hit C-c before, pretend that it was hit right
383 if (check_quit_flag ())
384 target_pass_ctrlc ();
387 /* Switch terminal state to DESIRED_STATE, either is_ours, or
388 is_ours_for_output. */
391 target_terminal_is_ours_kind (target_terminal_state desired_state
)
393 scoped_restore_current_inferior restore_inferior
;
395 /* Must do this in two passes. First, have all inferiors save the
396 current terminal settings. Then, after all inferiors have add a
397 chance to safely save the terminal settings, restore GDB's
398 terminal settings. */
400 for (inferior
*inf
: all_inferiors ())
402 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
404 set_current_inferior (inf
);
405 current_top_target ()->terminal_save_inferior ();
409 for (inferior
*inf
: all_inferiors ())
411 /* Note we don't check is_inferior here like above because we
412 need to handle 'is_ours_for_output -> is_ours' too. Careful
413 to never transition from 'is_ours' to 'is_ours_for_output',
415 if (inf
->terminal_state
!= target_terminal_state::is_ours
416 && inf
->terminal_state
!= desired_state
)
418 set_current_inferior (inf
);
419 if (desired_state
== target_terminal_state::is_ours
)
420 current_top_target ()->terminal_ours ();
421 else if (desired_state
== target_terminal_state::is_ours_for_output
)
422 current_top_target ()->terminal_ours_for_output ();
424 gdb_assert_not_reached ("unhandled desired state");
425 inf
->terminal_state
= desired_state
;
430 /* See target/target.h. */
433 target_terminal::ours ()
435 struct ui
*ui
= current_ui
;
437 /* See target_terminal::inferior. */
441 if (m_terminal_state
== target_terminal_state::is_ours
)
444 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
445 m_terminal_state
= target_terminal_state::is_ours
;
448 /* See target/target.h. */
451 target_terminal::ours_for_output ()
453 struct ui
*ui
= current_ui
;
455 /* See target_terminal::inferior. */
459 if (!target_terminal::is_inferior ())
462 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
463 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
466 /* See target/target.h. */
469 target_terminal::info (const char *arg
, int from_tty
)
471 current_top_target ()->terminal_info (arg
, from_tty
);
477 target_supports_terminal_ours (void)
479 /* The current top target is the target at the top of the target
480 stack of the current inferior. While normally there's always an
481 inferior, we must check for nullptr here because we can get here
482 very early during startup, before the initial inferior is first
484 inferior
*inf
= current_inferior ();
488 return inf
->top_target ()->supports_terminal_ours ();
494 error (_("You can't do that when your target is `%s'"),
495 current_top_target ()->shortname ());
501 error (_("You can't do that without a process to debug."));
505 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
507 printf_unfiltered (_("No saved terminal information.\n"));
510 /* A default implementation for the to_get_ada_task_ptid target method.
512 This function builds the PTID by using both LWP and TID as part of
513 the PTID lwp and tid elements. The pid used is the pid of the
517 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
519 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
522 static enum exec_direction_kind
523 default_execution_direction (struct target_ops
*self
)
525 if (!target_can_execute_reverse ())
527 else if (!target_can_async_p ())
530 gdb_assert_not_reached ("\
531 to_execution_direction must be implemented for reverse async");
537 decref_target (target_ops
*t
)
540 if (t
->refcount () == 0)
542 if (t
->stratum () == process_stratum
)
543 connection_list_remove (as_process_stratum_target (t
));
551 target_stack::push (target_ops
*t
)
555 strata stratum
= t
->stratum ();
557 if (stratum
== process_stratum
)
558 connection_list_add (as_process_stratum_target (t
));
560 /* If there's already a target at this stratum, remove it. */
562 if (m_stack
[stratum
] != NULL
)
563 unpush (m_stack
[stratum
]);
565 /* Now add the new one. */
566 m_stack
[stratum
] = t
;
575 push_target (struct target_ops
*t
)
577 current_inferior ()->push_target (t
);
583 push_target (target_ops_up
&&t
)
585 current_inferior ()->push_target (t
.get ());
592 unpush_target (struct target_ops
*t
)
594 return current_inferior ()->unpush_target (t
);
600 target_stack::unpush (target_ops
*t
)
602 gdb_assert (t
!= NULL
);
604 strata stratum
= t
->stratum ();
606 if (stratum
== dummy_stratum
)
607 internal_error (__FILE__
, __LINE__
,
608 _("Attempt to unpush the dummy target"));
610 /* Look for the specified target. Note that a target can only occur
611 once in the target stack. */
613 if (m_stack
[stratum
] != t
)
615 /* If T wasn't pushed, quit. Only open targets should be
620 /* Unchain the target. */
621 m_stack
[stratum
] = NULL
;
623 if (m_top
== stratum
)
624 m_top
= t
->beneath ()->stratum ();
626 /* Finally close the target, if there are no inferiors
627 referencing this target still. Note we do this after unchaining,
628 so any target method calls from within the target_close
629 implementation don't end up in T anymore. Do leave the target
630 open if we have are other inferiors referencing this target
637 /* Unpush TARGET and assert that it worked. */
640 unpush_target_and_assert (struct target_ops
*target
)
642 if (!unpush_target (target
))
644 fprintf_unfiltered (gdb_stderr
,
645 "pop_all_targets couldn't find target %s\n",
646 target
->shortname ());
647 internal_error (__FILE__
, __LINE__
,
648 _("failed internal consistency check"));
653 pop_all_targets_above (enum strata above_stratum
)
655 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
656 unpush_target_and_assert (current_top_target ());
662 pop_all_targets_at_and_above (enum strata stratum
)
664 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
665 unpush_target_and_assert (current_top_target ());
669 pop_all_targets (void)
671 pop_all_targets_above (dummy_stratum
);
674 /* Return true if T is now pushed in the current inferior's target
675 stack. Return false otherwise. */
678 target_is_pushed (target_ops
*t
)
680 return current_inferior ()->target_is_pushed (t
);
683 /* Default implementation of to_get_thread_local_address. */
686 generic_tls_error (void)
688 throw_error (TLS_GENERIC_ERROR
,
689 _("Cannot find thread-local variables on this target"));
692 /* Using the objfile specified in OBJFILE, find the address for the
693 current thread's thread-local storage with offset OFFSET. */
695 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
697 volatile CORE_ADDR addr
= 0;
698 struct target_ops
*target
= current_top_target ();
699 struct gdbarch
*gdbarch
= target_gdbarch ();
701 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
703 ptid_t ptid
= inferior_ptid
;
709 /* Fetch the load module address for this objfile. */
710 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
713 if (gdbarch_get_thread_local_address_p (gdbarch
))
714 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
717 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
719 /* If an error occurred, print TLS related messages here. Otherwise,
720 throw the error to some higher catcher. */
721 catch (const gdb_exception
&ex
)
723 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
727 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
728 error (_("Cannot find thread-local variables "
729 "in this thread library."));
731 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
732 if (objfile_is_library
)
733 error (_("Cannot find shared library `%s' in dynamic"
734 " linker's load module list"), objfile_name (objfile
));
736 error (_("Cannot find executable file `%s' in dynamic"
737 " linker's load module list"), objfile_name (objfile
));
739 case TLS_NOT_ALLOCATED_YET_ERROR
:
740 if (objfile_is_library
)
741 error (_("The inferior has not yet allocated storage for"
742 " thread-local variables in\n"
743 "the shared library `%s'\n"
745 objfile_name (objfile
),
746 target_pid_to_str (ptid
).c_str ());
748 error (_("The inferior has not yet allocated storage for"
749 " thread-local variables in\n"
750 "the executable `%s'\n"
752 objfile_name (objfile
),
753 target_pid_to_str (ptid
).c_str ());
755 case TLS_GENERIC_ERROR
:
756 if (objfile_is_library
)
757 error (_("Cannot find thread-local storage for %s, "
758 "shared library %s:\n%s"),
759 target_pid_to_str (ptid
).c_str (),
760 objfile_name (objfile
), ex
.what ());
762 error (_("Cannot find thread-local storage for %s, "
763 "executable file %s:\n%s"),
764 target_pid_to_str (ptid
).c_str (),
765 objfile_name (objfile
), ex
.what ());
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
);
796 gdb::unique_xmalloc_ptr
<char>
797 target_read_string (CORE_ADDR memaddr
, int len
, int *bytes_read
)
799 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
;
802 if (bytes_read
== nullptr)
803 bytes_read
= &ignore
;
805 /* Note that the endian-ness does not matter here. */
806 int errcode
= read_string (memaddr
, -1, 1, len
, BFD_ENDIAN_LITTLE
,
807 &buffer
, bytes_read
);
811 return gdb::unique_xmalloc_ptr
<char> ((char *) buffer
.release ());
814 struct target_section_table
*
815 target_get_section_table (struct target_ops
*target
)
817 return target
->get_section_table ();
820 /* Find a section containing ADDR. */
822 struct target_section
*
823 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
825 struct target_section_table
*table
= target_get_section_table (target
);
826 struct target_section
*secp
;
831 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
833 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
840 /* Helper for the memory xfer routines. Checks the attributes of the
841 memory region of MEMADDR against the read or write being attempted.
842 If the access is permitted returns true, otherwise returns false.
843 REGION_P is an optional output parameter. If not-NULL, it is
844 filled with a pointer to the memory region of MEMADDR. REG_LEN
845 returns LEN trimmed to the end of the region. This is how much the
846 caller can continue requesting, if the access is permitted. A
847 single xfer request must not straddle memory region boundaries. */
850 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
851 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
852 struct mem_region
**region_p
)
854 struct mem_region
*region
;
856 region
= lookup_mem_region (memaddr
);
858 if (region_p
!= NULL
)
861 switch (region
->attrib
.mode
)
864 if (writebuf
!= NULL
)
874 /* We only support writing to flash during "load" for now. */
875 if (writebuf
!= NULL
)
876 error (_("Writing to flash memory forbidden in this context"));
883 /* region->hi == 0 means there's no upper bound. */
884 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
887 *reg_len
= region
->hi
- memaddr
;
892 /* Read memory from more than one valid target. A core file, for
893 instance, could have some of memory but delegate other bits to
894 the target below it. So, we must manually try all targets. */
896 enum target_xfer_status
897 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
898 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
899 ULONGEST
*xfered_len
)
901 enum target_xfer_status res
;
905 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
906 readbuf
, writebuf
, memaddr
, len
,
908 if (res
== TARGET_XFER_OK
)
911 /* Stop if the target reports that the memory is not available. */
912 if (res
== TARGET_XFER_UNAVAILABLE
)
915 /* Don't continue past targets which have all the memory.
916 At one time, this code was necessary to read data from
917 executables / shared libraries when data for the requested
918 addresses weren't available in the core file. But now the
919 core target handles this case itself. */
920 if (ops
->has_all_memory ())
923 ops
= ops
->beneath ();
927 /* The cache works at the raw memory level. Make sure the cache
928 gets updated with raw contents no matter what kind of memory
929 object was originally being written. Note we do write-through
930 first, so that if it fails, we don't write to the cache contents
931 that never made it to the target. */
933 && inferior_ptid
!= null_ptid
934 && target_dcache_init_p ()
935 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
937 DCACHE
*dcache
= target_dcache_get ();
939 /* Note that writing to an area of memory which wasn't present
940 in the cache doesn't cause it to be loaded in. */
941 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
947 /* Perform a partial memory transfer.
948 For docs see target.h, to_xfer_partial. */
950 static enum target_xfer_status
951 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
952 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
953 ULONGEST len
, ULONGEST
*xfered_len
)
955 enum target_xfer_status res
;
957 struct mem_region
*region
;
958 struct inferior
*inf
;
960 /* For accesses to unmapped overlay sections, read directly from
961 files. Must do this first, as MEMADDR may need adjustment. */
962 if (readbuf
!= NULL
&& overlay_debugging
)
964 struct obj_section
*section
= find_pc_overlay (memaddr
);
966 if (pc_in_unmapped_range (memaddr
, section
))
968 struct target_section_table
*table
969 = target_get_section_table (ops
);
970 const char *section_name
= section
->the_bfd_section
->name
;
972 memaddr
= overlay_mapped_address (memaddr
, section
);
974 auto match_cb
= [=] (const struct target_section
*s
)
976 return (strcmp (section_name
, s
->the_bfd_section
->name
) == 0);
979 return section_table_xfer_memory_partial (readbuf
, writebuf
,
980 memaddr
, len
, xfered_len
,
987 /* Try the executable files, if "trust-readonly-sections" is set. */
988 if (readbuf
!= NULL
&& trust_readonly
)
990 struct target_section
*secp
;
991 struct target_section_table
*table
;
993 secp
= target_section_by_addr (ops
, memaddr
);
995 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
997 table
= target_get_section_table (ops
);
998 return section_table_xfer_memory_partial (readbuf
, writebuf
,
999 memaddr
, len
, xfered_len
,
1001 table
->sections_end
);
1005 /* Try GDB's internal data cache. */
1007 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1009 return TARGET_XFER_E_IO
;
1011 if (inferior_ptid
!= null_ptid
)
1012 inf
= current_inferior ();
1018 /* The dcache reads whole cache lines; that doesn't play well
1019 with reading from a trace buffer, because reading outside of
1020 the collected memory range fails. */
1021 && get_traceframe_number () == -1
1022 && (region
->attrib
.cache
1023 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1024 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1026 DCACHE
*dcache
= target_dcache_get_or_init ();
1028 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1029 reg_len
, xfered_len
);
1032 /* If none of those methods found the memory we wanted, fall back
1033 to a target partial transfer. Normally a single call to
1034 to_xfer_partial is enough; if it doesn't recognize an object
1035 it will call the to_xfer_partial of the next target down.
1036 But for memory this won't do. Memory is the only target
1037 object which can be read from more than one valid target.
1038 A core file, for instance, could have some of memory but
1039 delegate other bits to the target below it. So, we must
1040 manually try all targets. */
1042 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1045 /* If we still haven't got anything, return the last error. We
1050 /* Perform a partial memory transfer. For docs see target.h,
1053 static enum target_xfer_status
1054 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1055 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1056 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1058 enum target_xfer_status res
;
1060 /* Zero length requests are ok and require no work. */
1062 return TARGET_XFER_EOF
;
1064 memaddr
= address_significant (target_gdbarch (), memaddr
);
1066 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1067 breakpoint insns, thus hiding out from higher layers whether
1068 there are software breakpoints inserted in the code stream. */
1069 if (readbuf
!= NULL
)
1071 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1074 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1075 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1079 /* A large write request is likely to be partially satisfied
1080 by memory_xfer_partial_1. We will continually malloc
1081 and free a copy of the entire write request for breakpoint
1082 shadow handling even though we only end up writing a small
1083 subset of it. Cap writes to a limit specified by the target
1084 to mitigate this. */
1085 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1087 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1088 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1089 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1096 scoped_restore_tmpl
<int>
1097 make_scoped_restore_show_memory_breakpoints (int show
)
1099 return make_scoped_restore (&show_memory_breakpoints
, show
);
1102 /* For docs see target.h, to_xfer_partial. */
1104 enum target_xfer_status
1105 target_xfer_partial (struct target_ops
*ops
,
1106 enum target_object object
, const char *annex
,
1107 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1108 ULONGEST offset
, ULONGEST len
,
1109 ULONGEST
*xfered_len
)
1111 enum target_xfer_status retval
;
1113 /* Transfer is done when LEN is zero. */
1115 return TARGET_XFER_EOF
;
1117 if (writebuf
&& !may_write_memory
)
1118 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1119 core_addr_to_string_nz (offset
), plongest (len
));
1123 /* If this is a memory transfer, let the memory-specific code
1124 have a look at it instead. Memory transfers are more
1126 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1127 || object
== TARGET_OBJECT_CODE_MEMORY
)
1128 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1129 writebuf
, offset
, len
, xfered_len
);
1130 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1132 /* Skip/avoid accessing the target if the memory region
1133 attributes block the access. Check this here instead of in
1134 raw_memory_xfer_partial as otherwise we'd end up checking
1135 this twice in the case of the memory_xfer_partial path is
1136 taken; once before checking the dcache, and another in the
1137 tail call to raw_memory_xfer_partial. */
1138 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1140 return TARGET_XFER_E_IO
;
1142 /* Request the normal memory object from other layers. */
1143 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1147 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1148 writebuf
, offset
, len
, xfered_len
);
1152 const unsigned char *myaddr
= NULL
;
1154 fprintf_unfiltered (gdb_stdlog
,
1155 "%s:target_xfer_partial "
1156 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1159 (annex
? annex
: "(null)"),
1160 host_address_to_string (readbuf
),
1161 host_address_to_string (writebuf
),
1162 core_addr_to_string_nz (offset
),
1163 pulongest (len
), retval
,
1164 pulongest (*xfered_len
));
1170 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1174 fputs_unfiltered (", bytes =", gdb_stdlog
);
1175 for (i
= 0; i
< *xfered_len
; i
++)
1177 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1179 if (targetdebug
< 2 && i
> 0)
1181 fprintf_unfiltered (gdb_stdlog
, " ...");
1184 fprintf_unfiltered (gdb_stdlog
, "\n");
1187 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1191 fputc_unfiltered ('\n', gdb_stdlog
);
1194 /* Check implementations of to_xfer_partial update *XFERED_LEN
1195 properly. Do assertion after printing debug messages, so that we
1196 can find more clues on assertion failure from debugging messages. */
1197 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1198 gdb_assert (*xfered_len
> 0);
1203 /* Read LEN bytes of target memory at address MEMADDR, placing the
1204 results in GDB's memory at MYADDR. Returns either 0 for success or
1205 -1 if any error occurs.
1207 If an error occurs, no guarantee is made about the contents of the data at
1208 MYADDR. In particular, the caller should not depend upon partial reads
1209 filling the buffer with good data. There is no way for the caller to know
1210 how much good data might have been transfered anyway. Callers that can
1211 deal with partial reads should call target_read (which will retry until
1212 it makes no progress, and then return how much was transferred). */
1215 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1217 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1218 myaddr
, memaddr
, len
) == len
)
1224 /* See target/target.h. */
1227 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1232 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1235 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1236 gdbarch_byte_order (target_gdbarch ()));
1240 /* Like target_read_memory, but specify explicitly that this is a read
1241 from the target's raw memory. That is, this read bypasses the
1242 dcache, breakpoint shadowing, etc. */
1245 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1247 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1248 myaddr
, memaddr
, len
) == len
)
1254 /* Like target_read_memory, but specify explicitly that this is a read from
1255 the target's stack. This may trigger different cache behavior. */
1258 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1260 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1261 myaddr
, memaddr
, len
) == len
)
1267 /* Like target_read_memory, but specify explicitly that this is a read from
1268 the target's code. This may trigger different cache behavior. */
1271 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1273 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1274 myaddr
, memaddr
, len
) == len
)
1280 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1281 Returns either 0 for success or -1 if any error occurs. If an
1282 error occurs, no guarantee is made about how much data got written.
1283 Callers that can deal with partial writes should call
1287 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1289 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1290 myaddr
, memaddr
, len
) == len
)
1296 /* Write LEN bytes from MYADDR to target raw memory at address
1297 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1298 If an error occurs, no guarantee is made about how much data got
1299 written. Callers that can deal with partial writes should call
1303 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1305 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1306 myaddr
, memaddr
, len
) == len
)
1312 /* Fetch the target's memory map. */
1314 std::vector
<mem_region
>
1315 target_memory_map (void)
1317 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1318 if (result
.empty ())
1321 std::sort (result
.begin (), result
.end ());
1323 /* Check that regions do not overlap. Simultaneously assign
1324 a numbering for the "mem" commands to use to refer to
1326 mem_region
*last_one
= NULL
;
1327 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1329 mem_region
*this_one
= &result
[ix
];
1330 this_one
->number
= ix
;
1332 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1334 warning (_("Overlapping regions in memory map: ignoring"));
1335 return std::vector
<mem_region
> ();
1338 last_one
= this_one
;
1345 target_flash_erase (ULONGEST address
, LONGEST length
)
1347 current_top_target ()->flash_erase (address
, length
);
1351 target_flash_done (void)
1353 current_top_target ()->flash_done ();
1357 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1358 struct cmd_list_element
*c
, const char *value
)
1360 fprintf_filtered (file
,
1361 _("Mode for reading from readonly sections is %s.\n"),
1365 /* Target vector read/write partial wrapper functions. */
1367 static enum target_xfer_status
1368 target_read_partial (struct target_ops
*ops
,
1369 enum target_object object
,
1370 const char *annex
, gdb_byte
*buf
,
1371 ULONGEST offset
, ULONGEST len
,
1372 ULONGEST
*xfered_len
)
1374 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1378 static enum target_xfer_status
1379 target_write_partial (struct target_ops
*ops
,
1380 enum target_object object
,
1381 const char *annex
, const gdb_byte
*buf
,
1382 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1384 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1388 /* Wrappers to perform the full transfer. */
1390 /* For docs on target_read see target.h. */
1393 target_read (struct target_ops
*ops
,
1394 enum target_object object
,
1395 const char *annex
, gdb_byte
*buf
,
1396 ULONGEST offset
, LONGEST len
)
1398 LONGEST xfered_total
= 0;
1401 /* If we are reading from a memory object, find the length of an addressable
1402 unit for that architecture. */
1403 if (object
== TARGET_OBJECT_MEMORY
1404 || object
== TARGET_OBJECT_STACK_MEMORY
1405 || object
== TARGET_OBJECT_CODE_MEMORY
1406 || object
== TARGET_OBJECT_RAW_MEMORY
)
1407 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1409 while (xfered_total
< len
)
1411 ULONGEST xfered_partial
;
1412 enum target_xfer_status status
;
1414 status
= target_read_partial (ops
, object
, annex
,
1415 buf
+ xfered_total
* unit_size
,
1416 offset
+ xfered_total
, len
- xfered_total
,
1419 /* Call an observer, notifying them of the xfer progress? */
1420 if (status
== TARGET_XFER_EOF
)
1421 return xfered_total
;
1422 else if (status
== TARGET_XFER_OK
)
1424 xfered_total
+= xfered_partial
;
1428 return TARGET_XFER_E_IO
;
1434 /* Assuming that the entire [begin, end) range of memory cannot be
1435 read, try to read whatever subrange is possible to read.
1437 The function returns, in RESULT, either zero or one memory block.
1438 If there's a readable subrange at the beginning, it is completely
1439 read and returned. Any further readable subrange will not be read.
1440 Otherwise, if there's a readable subrange at the end, it will be
1441 completely read and returned. Any readable subranges before it
1442 (obviously, not starting at the beginning), will be ignored. In
1443 other cases -- either no readable subrange, or readable subrange(s)
1444 that is neither at the beginning, or end, nothing is returned.
1446 The purpose of this function is to handle a read across a boundary
1447 of accessible memory in a case when memory map is not available.
1448 The above restrictions are fine for this case, but will give
1449 incorrect results if the memory is 'patchy'. However, supporting
1450 'patchy' memory would require trying to read every single byte,
1451 and it seems unacceptable solution. Explicit memory map is
1452 recommended for this case -- and target_read_memory_robust will
1453 take care of reading multiple ranges then. */
1456 read_whatever_is_readable (struct target_ops
*ops
,
1457 const ULONGEST begin
, const ULONGEST end
,
1459 std::vector
<memory_read_result
> *result
)
1461 ULONGEST current_begin
= begin
;
1462 ULONGEST current_end
= end
;
1464 ULONGEST xfered_len
;
1466 /* If we previously failed to read 1 byte, nothing can be done here. */
1467 if (end
- begin
<= 1)
1470 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1472 /* Check that either first or the last byte is readable, and give up
1473 if not. This heuristic is meant to permit reading accessible memory
1474 at the boundary of accessible region. */
1475 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1476 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1481 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1482 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1483 &xfered_len
) == TARGET_XFER_OK
)
1491 /* Loop invariant is that the [current_begin, current_end) was previously
1492 found to be not readable as a whole.
1494 Note loop condition -- if the range has 1 byte, we can't divide the range
1495 so there's no point trying further. */
1496 while (current_end
- current_begin
> 1)
1498 ULONGEST first_half_begin
, first_half_end
;
1499 ULONGEST second_half_begin
, second_half_end
;
1501 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1505 first_half_begin
= current_begin
;
1506 first_half_end
= middle
;
1507 second_half_begin
= middle
;
1508 second_half_end
= current_end
;
1512 first_half_begin
= middle
;
1513 first_half_end
= current_end
;
1514 second_half_begin
= current_begin
;
1515 second_half_end
= middle
;
1518 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1519 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1521 first_half_end
- first_half_begin
);
1523 if (xfer
== first_half_end
- first_half_begin
)
1525 /* This half reads up fine. So, the error must be in the
1527 current_begin
= second_half_begin
;
1528 current_end
= second_half_end
;
1532 /* This half is not readable. Because we've tried one byte, we
1533 know some part of this half if actually readable. Go to the next
1534 iteration to divide again and try to read.
1536 We don't handle the other half, because this function only tries
1537 to read a single readable subrange. */
1538 current_begin
= first_half_begin
;
1539 current_end
= first_half_end
;
1545 /* The [begin, current_begin) range has been read. */
1546 result
->emplace_back (begin
, current_end
, std::move (buf
));
1550 /* The [current_end, end) range has been read. */
1551 LONGEST region_len
= end
- current_end
;
1553 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1554 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1555 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1556 region_len
* unit_size
);
1557 result
->emplace_back (current_end
, end
, std::move (data
));
1561 std::vector
<memory_read_result
>
1562 read_memory_robust (struct target_ops
*ops
,
1563 const ULONGEST offset
, const LONGEST len
)
1565 std::vector
<memory_read_result
> result
;
1566 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1568 LONGEST xfered_total
= 0;
1569 while (xfered_total
< len
)
1571 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1574 /* If there is no explicit region, a fake one should be created. */
1575 gdb_assert (region
);
1577 if (region
->hi
== 0)
1578 region_len
= len
- xfered_total
;
1580 region_len
= region
->hi
- offset
;
1582 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1584 /* Cannot read this region. Note that we can end up here only
1585 if the region is explicitly marked inaccessible, or
1586 'inaccessible-by-default' is in effect. */
1587 xfered_total
+= region_len
;
1591 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1592 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1593 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1595 LONGEST xfered_partial
=
1596 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1597 offset
+ xfered_total
, to_read
);
1598 /* Call an observer, notifying them of the xfer progress? */
1599 if (xfered_partial
<= 0)
1601 /* Got an error reading full chunk. See if maybe we can read
1603 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1604 offset
+ xfered_total
+ to_read
,
1605 unit_size
, &result
);
1606 xfered_total
+= to_read
;
1610 result
.emplace_back (offset
+ xfered_total
,
1611 offset
+ xfered_total
+ xfered_partial
,
1612 std::move (buffer
));
1613 xfered_total
+= xfered_partial
;
1623 /* An alternative to target_write with progress callbacks. */
1626 target_write_with_progress (struct target_ops
*ops
,
1627 enum target_object object
,
1628 const char *annex
, const gdb_byte
*buf
,
1629 ULONGEST offset
, LONGEST len
,
1630 void (*progress
) (ULONGEST
, void *), void *baton
)
1632 LONGEST xfered_total
= 0;
1635 /* If we are writing to a memory object, find the length of an addressable
1636 unit for that architecture. */
1637 if (object
== TARGET_OBJECT_MEMORY
1638 || object
== TARGET_OBJECT_STACK_MEMORY
1639 || object
== TARGET_OBJECT_CODE_MEMORY
1640 || object
== TARGET_OBJECT_RAW_MEMORY
)
1641 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1643 /* Give the progress callback a chance to set up. */
1645 (*progress
) (0, baton
);
1647 while (xfered_total
< len
)
1649 ULONGEST xfered_partial
;
1650 enum target_xfer_status status
;
1652 status
= target_write_partial (ops
, object
, annex
,
1653 buf
+ xfered_total
* unit_size
,
1654 offset
+ xfered_total
, len
- xfered_total
,
1657 if (status
!= TARGET_XFER_OK
)
1658 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1661 (*progress
) (xfered_partial
, baton
);
1663 xfered_total
+= xfered_partial
;
1669 /* For docs on target_write see target.h. */
1672 target_write (struct target_ops
*ops
,
1673 enum target_object object
,
1674 const char *annex
, const gdb_byte
*buf
,
1675 ULONGEST offset
, LONGEST len
)
1677 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1681 /* Help for target_read_alloc and target_read_stralloc. See their comments
1684 template <typename T
>
1685 gdb::optional
<gdb::def_vector
<T
>>
1686 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1689 gdb::def_vector
<T
> buf
;
1691 const int chunk
= 4096;
1693 /* This function does not have a length parameter; it reads the
1694 entire OBJECT). Also, it doesn't support objects fetched partly
1695 from one target and partly from another (in a different stratum,
1696 e.g. a core file and an executable). Both reasons make it
1697 unsuitable for reading memory. */
1698 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1700 /* Start by reading up to 4K at a time. The target will throttle
1701 this number down if necessary. */
1704 ULONGEST xfered_len
;
1705 enum target_xfer_status status
;
1707 buf
.resize (buf_pos
+ chunk
);
1709 status
= target_read_partial (ops
, object
, annex
,
1710 (gdb_byte
*) &buf
[buf_pos
],
1714 if (status
== TARGET_XFER_EOF
)
1716 /* Read all there was. */
1717 buf
.resize (buf_pos
);
1720 else if (status
!= TARGET_XFER_OK
)
1722 /* An error occurred. */
1726 buf_pos
+= xfered_len
;
1734 gdb::optional
<gdb::byte_vector
>
1735 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1738 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1743 gdb::optional
<gdb::char_vector
>
1744 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1747 gdb::optional
<gdb::char_vector
> buf
1748 = target_read_alloc_1
<char> (ops
, object
, annex
);
1753 if (buf
->empty () || buf
->back () != '\0')
1754 buf
->push_back ('\0');
1756 /* Check for embedded NUL bytes; but allow trailing NULs. */
1757 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1758 it
!= buf
->end (); it
++)
1761 warning (_("target object %d, annex %s, "
1762 "contained unexpected null characters"),
1763 (int) object
, annex
? annex
: "(none)");
1770 /* Memory transfer methods. */
1773 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1776 /* This method is used to read from an alternate, non-current
1777 target. This read must bypass the overlay support (as symbols
1778 don't match this target), and GDB's internal cache (wrong cache
1779 for this target). */
1780 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1782 memory_error (TARGET_XFER_E_IO
, addr
);
1786 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1787 int len
, enum bfd_endian byte_order
)
1789 gdb_byte buf
[sizeof (ULONGEST
)];
1791 gdb_assert (len
<= sizeof (buf
));
1792 get_target_memory (ops
, addr
, buf
, len
);
1793 return extract_unsigned_integer (buf
, len
, byte_order
);
1799 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1800 struct bp_target_info
*bp_tgt
)
1802 if (!may_insert_breakpoints
)
1804 warning (_("May not insert breakpoints"));
1808 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1814 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1815 struct bp_target_info
*bp_tgt
,
1816 enum remove_bp_reason reason
)
1818 /* This is kind of a weird case to handle, but the permission might
1819 have been changed after breakpoints were inserted - in which case
1820 we should just take the user literally and assume that any
1821 breakpoints should be left in place. */
1822 if (!may_insert_breakpoints
)
1824 warning (_("May not remove breakpoints"));
1828 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1832 info_target_command (const char *args
, int from_tty
)
1834 int has_all_mem
= 0;
1836 if (symfile_objfile
!= NULL
)
1837 printf_unfiltered (_("Symbols from \"%s\".\n"),
1838 objfile_name (symfile_objfile
));
1840 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1842 if (!t
->has_memory ())
1845 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1848 printf_unfiltered (_("\tWhile running this, "
1849 "GDB does not access memory from...\n"));
1850 printf_unfiltered ("%s:\n", t
->longname ());
1852 has_all_mem
= t
->has_all_memory ();
1856 /* This function is called before any new inferior is created, e.g.
1857 by running a program, attaching, or connecting to a target.
1858 It cleans up any state from previous invocations which might
1859 change between runs. This is a subset of what target_preopen
1860 resets (things which might change between targets). */
1863 target_pre_inferior (int from_tty
)
1865 /* Clear out solib state. Otherwise the solib state of the previous
1866 inferior might have survived and is entirely wrong for the new
1867 target. This has been observed on GNU/Linux using glibc 2.3. How
1879 Cannot access memory at address 0xdeadbeef
1882 /* In some OSs, the shared library list is the same/global/shared
1883 across inferiors. If code is shared between processes, so are
1884 memory regions and features. */
1885 if (!gdbarch_has_global_solist (target_gdbarch ()))
1887 no_shared_libraries (NULL
, from_tty
);
1889 invalidate_target_mem_regions ();
1891 target_clear_description ();
1894 /* attach_flag may be set if the previous process associated with
1895 the inferior was attached to. */
1896 current_inferior ()->attach_flag
= 0;
1898 current_inferior ()->highest_thread_num
= 0;
1900 agent_capability_invalidate ();
1903 /* This is to be called by the open routine before it does
1907 target_preopen (int from_tty
)
1911 if (current_inferior ()->pid
!= 0)
1914 || !target_has_execution ()
1915 || query (_("A program is being debugged already. Kill it? ")))
1917 /* Core inferiors actually should be detached, not
1919 if (target_has_execution ())
1922 target_detach (current_inferior (), 0);
1925 error (_("Program not killed."));
1928 /* Calling target_kill may remove the target from the stack. But if
1929 it doesn't (which seems like a win for UDI), remove it now. */
1930 /* Leave the exec target, though. The user may be switching from a
1931 live process to a core of the same program. */
1932 pop_all_targets_above (file_stratum
);
1934 target_pre_inferior (from_tty
);
1940 target_detach (inferior
*inf
, int from_tty
)
1942 /* After we have detached, we will clear the register cache for this inferior
1943 by calling registers_changed_ptid. We must save the pid_ptid before
1944 detaching, as the target detach method will clear inf->pid. */
1945 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
1947 /* As long as some to_detach implementations rely on the current_inferior
1948 (either directly, or indirectly, like through target_gdbarch or by
1949 reading memory), INF needs to be the current inferior. When that
1950 requirement will become no longer true, then we can remove this
1952 gdb_assert (inf
== current_inferior ());
1954 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
1955 /* Don't remove global breakpoints here. They're removed on
1956 disconnection from the target. */
1959 /* If we're in breakpoints-always-inserted mode, have to remove
1960 breakpoints before detaching. */
1961 remove_breakpoints_inf (current_inferior ());
1963 prepare_for_detach ();
1965 /* Hold a strong reference because detaching may unpush the
1967 auto proc_target_ref
= target_ops_ref::new_reference (inf
->process_target ());
1969 current_top_target ()->detach (inf
, from_tty
);
1971 process_stratum_target
*proc_target
1972 = as_process_stratum_target (proc_target_ref
.get ());
1974 registers_changed_ptid (proc_target
, save_pid_ptid
);
1976 /* We have to ensure we have no frame cache left. Normally,
1977 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
1978 inferior_ptid matches save_pid_ptid, but in our case, it does not
1979 call it, as inferior_ptid has been reset. */
1980 reinit_frame_cache ();
1984 target_disconnect (const char *args
, int from_tty
)
1986 /* If we're in breakpoints-always-inserted mode or if breakpoints
1987 are global across processes, we have to remove them before
1989 remove_breakpoints ();
1991 current_top_target ()->disconnect (args
, from_tty
);
1994 /* See target/target.h. */
1997 target_wait (ptid_t ptid
, struct target_waitstatus
*status
,
1998 target_wait_flags options
)
2000 return current_top_target ()->wait (ptid
, status
, options
);
2006 default_target_wait (struct target_ops
*ops
,
2007 ptid_t ptid
, struct target_waitstatus
*status
,
2008 target_wait_flags options
)
2010 status
->kind
= TARGET_WAITKIND_IGNORE
;
2011 return minus_one_ptid
;
2015 target_pid_to_str (ptid_t ptid
)
2017 return current_top_target ()->pid_to_str (ptid
);
2021 target_thread_name (struct thread_info
*info
)
2023 gdb_assert (info
->inf
== current_inferior ());
2025 return current_top_target ()->thread_name (info
);
2028 struct thread_info
*
2029 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2031 struct inferior
*inf
)
2033 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2040 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2042 return current_top_target ()->thread_info_to_thread_handle (tip
);
2046 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2048 process_stratum_target
*curr_target
= current_inferior ()->process_target ();
2050 target_dcache_invalidate ();
2052 current_top_target ()->resume (ptid
, step
, signal
);
2054 registers_changed_ptid (curr_target
, ptid
);
2055 /* We only set the internal executing state here. The user/frontend
2056 running state is set at a higher level. This also clears the
2057 thread's stop_pc as side effect. */
2058 set_executing (curr_target
, ptid
, true);
2059 clear_inline_frame_state (curr_target
, ptid
);
2062 /* If true, target_commit_resume is a nop. */
2063 static int defer_target_commit_resume
;
2068 target_commit_resume (void)
2070 if (defer_target_commit_resume
)
2073 current_top_target ()->commit_resume ();
2078 scoped_restore_tmpl
<int>
2079 make_scoped_defer_target_commit_resume ()
2081 return make_scoped_restore (&defer_target_commit_resume
, 1);
2085 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2087 current_top_target ()->pass_signals (pass_signals
);
2091 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2093 current_top_target ()->program_signals (program_signals
);
2097 default_follow_fork (struct target_ops
*self
, bool follow_child
,
2100 /* Some target returned a fork event, but did not know how to follow it. */
2101 internal_error (__FILE__
, __LINE__
,
2102 _("could not find a target to follow fork"));
2105 /* Look through the list of possible targets for a target that can
2109 target_follow_fork (bool follow_child
, bool detach_fork
)
2111 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2114 /* Target wrapper for follow exec hook. */
2117 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2119 current_top_target ()->follow_exec (inf
, execd_pathname
);
2123 default_mourn_inferior (struct target_ops
*self
)
2125 internal_error (__FILE__
, __LINE__
,
2126 _("could not find a target to follow mourn inferior"));
2130 target_mourn_inferior (ptid_t ptid
)
2132 gdb_assert (ptid
== inferior_ptid
);
2133 current_top_target ()->mourn_inferior ();
2135 /* We no longer need to keep handles on any of the object files.
2136 Make sure to release them to avoid unnecessarily locking any
2137 of them while we're not actually debugging. */
2138 bfd_cache_close_all ();
2141 /* Look for a target which can describe architectural features, starting
2142 from TARGET. If we find one, return its description. */
2144 const struct target_desc
*
2145 target_read_description (struct target_ops
*target
)
2147 return target
->read_description ();
2150 /* This implements a basic search of memory, reading target memory and
2151 performing the search here (as opposed to performing the search in on the
2152 target side with, for example, gdbserver). */
2155 simple_search_memory (struct target_ops
*ops
,
2156 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2157 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2158 CORE_ADDR
*found_addrp
)
2160 /* NOTE: also defined in find.c testcase. */
2161 #define SEARCH_CHUNK_SIZE 16000
2162 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2163 /* Buffer to hold memory contents for searching. */
2164 unsigned search_buf_size
;
2166 search_buf_size
= chunk_size
+ pattern_len
- 1;
2168 /* No point in trying to allocate a buffer larger than the search space. */
2169 if (search_space_len
< search_buf_size
)
2170 search_buf_size
= search_space_len
;
2172 gdb::byte_vector
search_buf (search_buf_size
);
2174 /* Prime the search buffer. */
2176 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2177 search_buf
.data (), start_addr
, search_buf_size
)
2180 warning (_("Unable to access %s bytes of target "
2181 "memory at %s, halting search."),
2182 pulongest (search_buf_size
), hex_string (start_addr
));
2186 /* Perform the search.
2188 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2189 When we've scanned N bytes we copy the trailing bytes to the start and
2190 read in another N bytes. */
2192 while (search_space_len
>= pattern_len
)
2194 gdb_byte
*found_ptr
;
2195 unsigned nr_search_bytes
2196 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2198 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2199 pattern
, pattern_len
);
2201 if (found_ptr
!= NULL
)
2203 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2205 *found_addrp
= found_addr
;
2209 /* Not found in this chunk, skip to next chunk. */
2211 /* Don't let search_space_len wrap here, it's unsigned. */
2212 if (search_space_len
>= chunk_size
)
2213 search_space_len
-= chunk_size
;
2215 search_space_len
= 0;
2217 if (search_space_len
>= pattern_len
)
2219 unsigned keep_len
= search_buf_size
- chunk_size
;
2220 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2223 /* Copy the trailing part of the previous iteration to the front
2224 of the buffer for the next iteration. */
2225 gdb_assert (keep_len
== pattern_len
- 1);
2226 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2228 nr_to_read
= std::min (search_space_len
- keep_len
,
2229 (ULONGEST
) chunk_size
);
2231 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2232 &search_buf
[keep_len
], read_addr
,
2233 nr_to_read
) != nr_to_read
)
2235 warning (_("Unable to access %s bytes of target "
2236 "memory at %s, halting search."),
2237 plongest (nr_to_read
),
2238 hex_string (read_addr
));
2242 start_addr
+= chunk_size
;
2251 /* Default implementation of memory-searching. */
2254 default_search_memory (struct target_ops
*self
,
2255 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2256 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2257 CORE_ADDR
*found_addrp
)
2259 /* Start over from the top of the target stack. */
2260 return simple_search_memory (current_top_target (),
2261 start_addr
, search_space_len
,
2262 pattern
, pattern_len
, found_addrp
);
2265 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2266 sequence of bytes in PATTERN with length PATTERN_LEN.
2268 The result is 1 if found, 0 if not found, and -1 if there was an error
2269 requiring halting of the search (e.g. memory read error).
2270 If the pattern is found the address is recorded in FOUND_ADDRP. */
2273 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2274 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2275 CORE_ADDR
*found_addrp
)
2277 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2278 pattern
, pattern_len
, found_addrp
);
2281 /* Look through the currently pushed targets. If none of them will
2282 be able to restart the currently running process, issue an error
2286 target_require_runnable (void)
2288 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2290 /* If this target knows how to create a new program, then
2291 assume we will still be able to after killing the current
2292 one. Either killing and mourning will not pop T, or else
2293 find_default_run_target will find it again. */
2294 if (t
->can_create_inferior ())
2297 /* Do not worry about targets at certain strata that can not
2298 create inferiors. Assume they will be pushed again if
2299 necessary, and continue to the process_stratum. */
2300 if (t
->stratum () > process_stratum
)
2303 error (_("The \"%s\" target does not support \"run\". "
2304 "Try \"help target\" or \"continue\"."),
2308 /* This function is only called if the target is running. In that
2309 case there should have been a process_stratum target and it
2310 should either know how to create inferiors, or not... */
2311 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2314 /* Whether GDB is allowed to fall back to the default run target for
2315 "run", "attach", etc. when no target is connected yet. */
2316 static bool auto_connect_native_target
= true;
2319 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2320 struct cmd_list_element
*c
, const char *value
)
2322 fprintf_filtered (file
,
2323 _("Whether GDB may automatically connect to the "
2324 "native target is %s.\n"),
2328 /* A pointer to the target that can respond to "run" or "attach".
2329 Native targets are always singletons and instantiated early at GDB
2331 static target_ops
*the_native_target
;
2336 set_native_target (target_ops
*target
)
2338 if (the_native_target
!= NULL
)
2339 internal_error (__FILE__
, __LINE__
,
2340 _("native target already set (\"%s\")."),
2341 the_native_target
->longname ());
2343 the_native_target
= target
;
2349 get_native_target ()
2351 return the_native_target
;
2354 /* Look through the list of possible targets for a target that can
2355 execute a run or attach command without any other data. This is
2356 used to locate the default process stratum.
2358 If DO_MESG is not NULL, the result is always valid (error() is
2359 called for errors); else, return NULL on error. */
2361 static struct target_ops
*
2362 find_default_run_target (const char *do_mesg
)
2364 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2365 return the_native_target
;
2367 if (do_mesg
!= NULL
)
2368 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2375 find_attach_target (void)
2377 /* If a target on the current stack can attach, use it. */
2378 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2380 if (t
->can_attach ())
2384 /* Otherwise, use the default run target for attaching. */
2385 return find_default_run_target ("attach");
2391 find_run_target (void)
2393 /* If a target on the current stack can run, use it. */
2394 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2396 if (t
->can_create_inferior ())
2400 /* Otherwise, use the default run target. */
2401 return find_default_run_target ("run");
2405 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2410 /* Implement the "info proc" command. */
2413 target_info_proc (const char *args
, enum info_proc_what what
)
2415 struct target_ops
*t
;
2417 /* If we're already connected to something that can get us OS
2418 related data, use it. Otherwise, try using the native
2420 t
= find_target_at (process_stratum
);
2422 t
= find_default_run_target (NULL
);
2424 for (; t
!= NULL
; t
= t
->beneath ())
2426 if (t
->info_proc (args
, what
))
2429 fprintf_unfiltered (gdb_stdlog
,
2430 "target_info_proc (\"%s\", %d)\n", args
, what
);
2440 find_default_supports_disable_randomization (struct target_ops
*self
)
2442 struct target_ops
*t
;
2444 t
= find_default_run_target (NULL
);
2446 return t
->supports_disable_randomization ();
2451 target_supports_disable_randomization (void)
2453 return current_top_target ()->supports_disable_randomization ();
2456 /* See target/target.h. */
2459 target_supports_multi_process (void)
2461 return current_top_target ()->supports_multi_process ();
2466 gdb::optional
<gdb::char_vector
>
2467 target_get_osdata (const char *type
)
2469 struct target_ops
*t
;
2471 /* If we're already connected to something that can get us OS
2472 related data, use it. Otherwise, try using the native
2474 t
= find_target_at (process_stratum
);
2476 t
= find_default_run_target ("get OS data");
2481 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2484 /* Determine the current address space of thread PTID. */
2486 struct address_space
*
2487 target_thread_address_space (ptid_t ptid
)
2489 struct address_space
*aspace
;
2491 aspace
= current_top_target ()->thread_address_space (ptid
);
2492 gdb_assert (aspace
!= NULL
);
2500 target_ops::beneath () const
2502 return current_inferior ()->find_target_beneath (this);
2506 target_ops::close ()
2511 target_ops::can_attach ()
2517 target_ops::attach (const char *, int)
2519 gdb_assert_not_reached ("target_ops::attach called");
2523 target_ops::can_create_inferior ()
2529 target_ops::create_inferior (const char *, const std::string
&,
2532 gdb_assert_not_reached ("target_ops::create_inferior called");
2536 target_ops::can_run ()
2544 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2553 /* Target file operations. */
2555 static struct target_ops
*
2556 default_fileio_target (void)
2558 struct target_ops
*t
;
2560 /* If we're already connected to something that can perform
2561 file I/O, use it. Otherwise, try using the native target. */
2562 t
= find_target_at (process_stratum
);
2565 return find_default_run_target ("file I/O");
2568 /* File handle for target file operations. */
2572 /* The target on which this file is open. NULL if the target is
2573 meanwhile closed while the handle is open. */
2576 /* The file descriptor on the target. */
2579 /* Check whether this fileio_fh_t represents a closed file. */
2582 return target_fd
< 0;
2586 /* Vector of currently open file handles. The value returned by
2587 target_fileio_open and passed as the FD argument to other
2588 target_fileio_* functions is an index into this vector. This
2589 vector's entries are never freed; instead, files are marked as
2590 closed, and the handle becomes available for reuse. */
2591 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2593 /* Index into fileio_fhandles of the lowest handle that might be
2594 closed. This permits handle reuse without searching the whole
2595 list each time a new file is opened. */
2596 static int lowest_closed_fd
;
2598 /* Invalidate the target associated with open handles that were open
2599 on target TARG, since we're about to close (and maybe destroy) the
2600 target. The handles remain open from the client's perspective, but
2601 trying to do anything with them other than closing them will fail
2605 fileio_handles_invalidate_target (target_ops
*targ
)
2607 for (fileio_fh_t
&fh
: fileio_fhandles
)
2608 if (fh
.target
== targ
)
2612 /* Acquire a target fileio file descriptor. */
2615 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2617 /* Search for closed handles to reuse. */
2618 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2620 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2622 if (fh
.is_closed ())
2626 /* Push a new handle if no closed handles were found. */
2627 if (lowest_closed_fd
== fileio_fhandles
.size ())
2628 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2630 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2632 /* Should no longer be marked closed. */
2633 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2635 /* Return its index, and start the next lookup at
2637 return lowest_closed_fd
++;
2640 /* Release a target fileio file descriptor. */
2643 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2646 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2649 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2651 static fileio_fh_t
*
2652 fileio_fd_to_fh (int fd
)
2654 return &fileio_fhandles
[fd
];
2658 /* Default implementations of file i/o methods. We don't want these
2659 to delegate automatically, because we need to know which target
2660 supported the method, in order to call it directly from within
2661 pread/pwrite, etc. */
2664 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2665 int flags
, int mode
, int warn_if_slow
,
2668 *target_errno
= FILEIO_ENOSYS
;
2673 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2674 ULONGEST offset
, int *target_errno
)
2676 *target_errno
= FILEIO_ENOSYS
;
2681 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2682 ULONGEST offset
, int *target_errno
)
2684 *target_errno
= FILEIO_ENOSYS
;
2689 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2691 *target_errno
= FILEIO_ENOSYS
;
2696 target_ops::fileio_close (int fd
, int *target_errno
)
2698 *target_errno
= FILEIO_ENOSYS
;
2703 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2706 *target_errno
= FILEIO_ENOSYS
;
2710 gdb::optional
<std::string
>
2711 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2714 *target_errno
= FILEIO_ENOSYS
;
2721 target_fileio_open (struct inferior
*inf
, const char *filename
,
2722 int flags
, int mode
, bool warn_if_slow
, int *target_errno
)
2724 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2726 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2727 warn_if_slow
, target_errno
);
2729 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2735 fd
= acquire_fileio_fd (t
, fd
);
2738 fprintf_unfiltered (gdb_stdlog
,
2739 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2741 inf
== NULL
? 0 : inf
->num
,
2742 filename
, flags
, mode
,
2744 fd
!= -1 ? 0 : *target_errno
);
2748 *target_errno
= FILEIO_ENOSYS
;
2755 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2756 ULONGEST offset
, int *target_errno
)
2758 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2761 if (fh
->is_closed ())
2762 *target_errno
= EBADF
;
2763 else if (fh
->target
== NULL
)
2764 *target_errno
= EIO
;
2766 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2767 len
, offset
, target_errno
);
2770 fprintf_unfiltered (gdb_stdlog
,
2771 "target_fileio_pwrite (%d,...,%d,%s) "
2773 fd
, len
, pulongest (offset
),
2774 ret
, ret
!= -1 ? 0 : *target_errno
);
2781 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2782 ULONGEST offset
, int *target_errno
)
2784 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2787 if (fh
->is_closed ())
2788 *target_errno
= EBADF
;
2789 else if (fh
->target
== NULL
)
2790 *target_errno
= EIO
;
2792 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2793 len
, offset
, target_errno
);
2796 fprintf_unfiltered (gdb_stdlog
,
2797 "target_fileio_pread (%d,...,%d,%s) "
2799 fd
, len
, pulongest (offset
),
2800 ret
, ret
!= -1 ? 0 : *target_errno
);
2807 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2809 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2812 if (fh
->is_closed ())
2813 *target_errno
= EBADF
;
2814 else if (fh
->target
== NULL
)
2815 *target_errno
= EIO
;
2817 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2820 fprintf_unfiltered (gdb_stdlog
,
2821 "target_fileio_fstat (%d) = %d (%d)\n",
2822 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2829 target_fileio_close (int fd
, int *target_errno
)
2831 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2834 if (fh
->is_closed ())
2835 *target_errno
= EBADF
;
2838 if (fh
->target
!= NULL
)
2839 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2843 release_fileio_fd (fd
, fh
);
2847 fprintf_unfiltered (gdb_stdlog
,
2848 "target_fileio_close (%d) = %d (%d)\n",
2849 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2856 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2859 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2861 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2863 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2867 fprintf_unfiltered (gdb_stdlog
,
2868 "target_fileio_unlink (%d,%s)"
2870 inf
== NULL
? 0 : inf
->num
, filename
,
2871 ret
, ret
!= -1 ? 0 : *target_errno
);
2875 *target_errno
= FILEIO_ENOSYS
;
2881 gdb::optional
<std::string
>
2882 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2885 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2887 gdb::optional
<std::string
> ret
2888 = t
->fileio_readlink (inf
, filename
, target_errno
);
2890 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2894 fprintf_unfiltered (gdb_stdlog
,
2895 "target_fileio_readlink (%d,%s)"
2897 inf
== NULL
? 0 : inf
->num
,
2898 filename
, ret
? ret
->c_str () : "(nil)",
2899 ret
? 0 : *target_errno
);
2903 *target_errno
= FILEIO_ENOSYS
;
2907 /* Like scoped_fd, but specific to target fileio. */
2909 class scoped_target_fd
2912 explicit scoped_target_fd (int fd
) noexcept
2917 ~scoped_target_fd ()
2923 target_fileio_close (m_fd
, &target_errno
);
2927 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
2929 int get () const noexcept
2938 /* Read target file FILENAME, in the filesystem as seen by INF. If
2939 INF is NULL, use the filesystem seen by the debugger (GDB or, for
2940 remote targets, the remote stub). Store the result in *BUF_P and
2941 return the size of the transferred data. PADDING additional bytes
2942 are available in *BUF_P. This is a helper function for
2943 target_fileio_read_alloc; see the declaration of that function for
2944 more information. */
2947 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
2948 gdb_byte
**buf_p
, int padding
)
2950 size_t buf_alloc
, buf_pos
;
2955 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
2956 0700, false, &target_errno
));
2957 if (fd
.get () == -1)
2960 /* Start by reading up to 4K at a time. The target will throttle
2961 this number down if necessary. */
2963 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
2967 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
2968 buf_alloc
- buf_pos
- padding
, buf_pos
,
2972 /* An error occurred. */
2978 /* Read all there was. */
2988 /* If the buffer is filling up, expand it. */
2989 if (buf_alloc
< buf_pos
* 2)
2992 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3002 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3005 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3010 gdb::unique_xmalloc_ptr
<char>
3011 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3015 LONGEST i
, transferred
;
3017 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3018 bufstr
= (char *) buffer
;
3020 if (transferred
< 0)
3021 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3023 if (transferred
== 0)
3024 return make_unique_xstrdup ("");
3026 bufstr
[transferred
] = 0;
3028 /* Check for embedded NUL bytes; but allow trailing NULs. */
3029 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3032 warning (_("target file %s "
3033 "contained unexpected null characters"),
3038 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3043 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3044 CORE_ADDR addr
, int len
)
3046 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3050 default_watchpoint_addr_within_range (struct target_ops
*target
,
3052 CORE_ADDR start
, int length
)
3054 return addr
>= start
&& addr
< start
+ length
;
3060 target_stack::find_beneath (const target_ops
*t
) const
3062 /* Look for a non-empty slot at stratum levels beneath T's. */
3063 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3064 if (m_stack
[stratum
] != NULL
)
3065 return m_stack
[stratum
];
3073 find_target_at (enum strata stratum
)
3075 return current_inferior ()->target_at (stratum
);
3083 target_announce_detach (int from_tty
)
3086 const char *exec_file
;
3091 exec_file
= get_exec_file (0);
3092 if (exec_file
== NULL
)
3095 pid
= inferior_ptid
.pid ();
3096 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3097 target_pid_to_str (ptid_t (pid
)).c_str ());
3100 /* The inferior process has died. Long live the inferior! */
3103 generic_mourn_inferior (void)
3105 inferior
*inf
= current_inferior ();
3107 switch_to_no_thread ();
3109 /* Mark breakpoints uninserted in case something tries to delete a
3110 breakpoint while we delete the inferior's threads (which would
3111 fail, since the inferior is long gone). */
3112 mark_breakpoints_out ();
3115 exit_inferior (inf
);
3117 /* Note this wipes step-resume breakpoints, so needs to be done
3118 after exit_inferior, which ends up referencing the step-resume
3119 breakpoints through clear_thread_inferior_resources. */
3120 breakpoint_init_inferior (inf_exited
);
3122 registers_changed ();
3124 reopen_exec_file ();
3125 reinit_frame_cache ();
3127 if (deprecated_detach_hook
)
3128 deprecated_detach_hook ();
3131 /* Convert a normal process ID to a string. Returns the string in a
3135 normal_pid_to_str (ptid_t ptid
)
3137 return string_printf ("process %d", ptid
.pid ());
3141 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3143 return normal_pid_to_str (ptid
);
3146 /* Error-catcher for target_find_memory_regions. */
3148 dummy_find_memory_regions (struct target_ops
*self
,
3149 find_memory_region_ftype ignore1
, void *ignore2
)
3151 error (_("Command not implemented for this target."));
3155 /* Error-catcher for target_make_corefile_notes. */
3157 dummy_make_corefile_notes (struct target_ops
*self
,
3158 bfd
*ignore1
, int *ignore2
)
3160 error (_("Command not implemented for this target."));
3164 #include "target-delegates.c"
3166 /* The initial current target, so that there is always a semi-valid
3169 static dummy_target the_dummy_target
;
3176 return &the_dummy_target
;
3179 static const target_info dummy_target_info
= {
3186 dummy_target::stratum () const
3188 return dummy_stratum
;
3192 debug_target::stratum () const
3194 return debug_stratum
;
3198 dummy_target::info () const
3200 return dummy_target_info
;
3204 debug_target::info () const
3206 return beneath ()->info ();
3212 target_close (struct target_ops
*targ
)
3214 gdb_assert (!target_is_pushed (targ
));
3216 fileio_handles_invalidate_target (targ
);
3221 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3225 target_thread_alive (ptid_t ptid
)
3227 return current_top_target ()->thread_alive (ptid
);
3231 target_update_thread_list (void)
3233 current_top_target ()->update_thread_list ();
3237 target_stop (ptid_t ptid
)
3241 warning (_("May not interrupt or stop the target, ignoring attempt"));
3245 current_top_target ()->stop (ptid
);
3253 warning (_("May not interrupt or stop the target, ignoring attempt"));
3257 current_top_target ()->interrupt ();
3263 target_pass_ctrlc (void)
3265 /* Pass the Ctrl-C to the first target that has a thread
3267 for (inferior
*inf
: all_inferiors ())
3269 target_ops
*proc_target
= inf
->process_target ();
3270 if (proc_target
== NULL
)
3273 for (thread_info
*thr
: inf
->non_exited_threads ())
3275 /* A thread can be THREAD_STOPPED and executing, while
3276 running an infcall. */
3277 if (thr
->state
== THREAD_RUNNING
|| thr
->executing
)
3279 /* We can get here quite deep in target layers. Avoid
3280 switching thread context or anything that would
3281 communicate with the target (e.g., to fetch
3282 registers), or flushing e.g., the frame cache. We
3283 just switch inferior in order to be able to call
3284 through the target_stack. */
3285 scoped_restore_current_inferior restore_inferior
;
3286 set_current_inferior (inf
);
3287 current_top_target ()->pass_ctrlc ();
3297 default_target_pass_ctrlc (struct target_ops
*ops
)
3299 target_interrupt ();
3302 /* See target/target.h. */
3305 target_stop_and_wait (ptid_t ptid
)
3307 struct target_waitstatus status
;
3308 bool was_non_stop
= non_stop
;
3313 memset (&status
, 0, sizeof (status
));
3314 target_wait (ptid
, &status
, 0);
3316 non_stop
= was_non_stop
;
3319 /* See target/target.h. */
3322 target_continue_no_signal (ptid_t ptid
)
3324 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3327 /* See target/target.h. */
3330 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3332 target_resume (ptid
, 0, signal
);
3335 /* Concatenate ELEM to LIST, a comma-separated list. */
3338 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3340 if (!list
->empty ())
3341 list
->append (", ");
3343 list
->append (elem
);
3346 /* Helper for target_options_to_string. If OPT is present in
3347 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3348 OPT is removed from TARGET_OPTIONS. */
3351 do_option (target_wait_flags
*target_options
, std::string
*ret
,
3352 target_wait_flag opt
, const char *opt_str
)
3354 if ((*target_options
& opt
) != 0)
3356 str_comma_list_concat_elem (ret
, opt_str
);
3357 *target_options
&= ~opt
;
3364 target_options_to_string (target_wait_flags target_options
)
3368 #define DO_TARG_OPTION(OPT) \
3369 do_option (&target_options, &ret, OPT, #OPT)
3371 DO_TARG_OPTION (TARGET_WNOHANG
);
3373 if (target_options
!= 0)
3374 str_comma_list_concat_elem (&ret
, "unknown???");
3380 target_fetch_registers (struct regcache
*regcache
, int regno
)
3382 current_top_target ()->fetch_registers (regcache
, regno
);
3384 regcache
->debug_print_register ("target_fetch_registers", regno
);
3388 target_store_registers (struct regcache
*regcache
, int regno
)
3390 if (!may_write_registers
)
3391 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3393 current_top_target ()->store_registers (regcache
, regno
);
3396 regcache
->debug_print_register ("target_store_registers", regno
);
3401 target_core_of_thread (ptid_t ptid
)
3403 return current_top_target ()->core_of_thread (ptid
);
3407 simple_verify_memory (struct target_ops
*ops
,
3408 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3410 LONGEST total_xfered
= 0;
3412 while (total_xfered
< size
)
3414 ULONGEST xfered_len
;
3415 enum target_xfer_status status
;
3417 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3419 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3420 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3422 if (status
== TARGET_XFER_OK
3423 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3425 total_xfered
+= xfered_len
;
3434 /* Default implementation of memory verification. */
3437 default_verify_memory (struct target_ops
*self
,
3438 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3440 /* Start over from the top of the target stack. */
3441 return simple_verify_memory (current_top_target (),
3442 data
, memaddr
, size
);
3446 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3448 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3451 /* The documentation for this function is in its prototype declaration in
3455 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3456 enum target_hw_bp_type rw
)
3458 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3461 /* The documentation for this function is in its prototype declaration in
3465 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3466 enum target_hw_bp_type rw
)
3468 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3471 /* The documentation for this function is in its prototype declaration
3475 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3477 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3480 /* The documentation for this function is in its prototype declaration
3484 target_ranged_break_num_registers (void)
3486 return current_top_target ()->ranged_break_num_registers ();
3491 struct btrace_target_info
*
3492 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3494 return current_top_target ()->enable_btrace (ptid
, conf
);
3500 target_disable_btrace (struct btrace_target_info
*btinfo
)
3502 current_top_target ()->disable_btrace (btinfo
);
3508 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3510 current_top_target ()->teardown_btrace (btinfo
);
3516 target_read_btrace (struct btrace_data
*btrace
,
3517 struct btrace_target_info
*btinfo
,
3518 enum btrace_read_type type
)
3520 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3525 const struct btrace_config
*
3526 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3528 return current_top_target ()->btrace_conf (btinfo
);
3534 target_stop_recording (void)
3536 current_top_target ()->stop_recording ();
3542 target_save_record (const char *filename
)
3544 current_top_target ()->save_record (filename
);
3550 target_supports_delete_record ()
3552 return current_top_target ()->supports_delete_record ();
3558 target_delete_record (void)
3560 current_top_target ()->delete_record ();
3566 target_record_method (ptid_t ptid
)
3568 return current_top_target ()->record_method (ptid
);
3574 target_record_is_replaying (ptid_t ptid
)
3576 return current_top_target ()->record_is_replaying (ptid
);
3582 target_record_will_replay (ptid_t ptid
, int dir
)
3584 return current_top_target ()->record_will_replay (ptid
, dir
);
3590 target_record_stop_replaying (void)
3592 current_top_target ()->record_stop_replaying ();
3598 target_goto_record_begin (void)
3600 current_top_target ()->goto_record_begin ();
3606 target_goto_record_end (void)
3608 current_top_target ()->goto_record_end ();
3614 target_goto_record (ULONGEST insn
)
3616 current_top_target ()->goto_record (insn
);
3622 target_insn_history (int size
, gdb_disassembly_flags flags
)
3624 current_top_target ()->insn_history (size
, flags
);
3630 target_insn_history_from (ULONGEST from
, int size
,
3631 gdb_disassembly_flags flags
)
3633 current_top_target ()->insn_history_from (from
, size
, flags
);
3639 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3640 gdb_disassembly_flags flags
)
3642 current_top_target ()->insn_history_range (begin
, end
, flags
);
3648 target_call_history (int size
, record_print_flags flags
)
3650 current_top_target ()->call_history (size
, flags
);
3656 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3658 current_top_target ()->call_history_from (begin
, size
, flags
);
3664 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3666 current_top_target ()->call_history_range (begin
, end
, flags
);
3671 const struct frame_unwind
*
3672 target_get_unwinder (void)
3674 return current_top_target ()->get_unwinder ();
3679 const struct frame_unwind
*
3680 target_get_tailcall_unwinder (void)
3682 return current_top_target ()->get_tailcall_unwinder ();
3688 target_prepare_to_generate_core (void)
3690 current_top_target ()->prepare_to_generate_core ();
3696 target_done_generating_core (void)
3698 current_top_target ()->done_generating_core ();
3703 static char targ_desc
[] =
3704 "Names of targets and files being debugged.\nShows the entire \
3705 stack of targets currently in use (including the exec-file,\n\
3706 core-file, and process, if any), as well as the symbol file name.";
3709 default_rcmd (struct target_ops
*self
, const char *command
,
3710 struct ui_file
*output
)
3712 error (_("\"monitor\" command not supported by this target."));
3716 do_monitor_command (const char *cmd
, int from_tty
)
3718 target_rcmd (cmd
, gdb_stdtarg
);
3721 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3725 flash_erase_command (const char *cmd
, int from_tty
)
3727 /* Used to communicate termination of flash operations to the target. */
3728 bool found_flash_region
= false;
3729 struct gdbarch
*gdbarch
= target_gdbarch ();
3731 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3733 /* Iterate over all memory regions. */
3734 for (const mem_region
&m
: mem_regions
)
3736 /* Is this a flash memory region? */
3737 if (m
.attrib
.mode
== MEM_FLASH
)
3739 found_flash_region
= true;
3740 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3742 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3744 current_uiout
->message (_("Erasing flash memory region at address "));
3745 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3746 current_uiout
->message (", size = ");
3747 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3748 current_uiout
->message ("\n");
3752 /* Did we do any flash operations? If so, we need to finalize them. */
3753 if (found_flash_region
)
3754 target_flash_done ();
3756 current_uiout
->message (_("No flash memory regions found.\n"));
3759 /* Print the name of each layers of our target stack. */
3762 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3764 printf_filtered (_("The current target stack is:\n"));
3766 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3768 if (t
->stratum () == debug_stratum
)
3770 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3777 target_async (int enable
)
3779 infrun_async (enable
);
3780 current_top_target ()->async (enable
);
3786 target_thread_events (int enable
)
3788 current_top_target ()->thread_events (enable
);
3791 /* Controls if targets can report that they can/are async. This is
3792 just for maintainers to use when debugging gdb. */
3793 bool target_async_permitted
= true;
3795 /* The set command writes to this variable. If the inferior is
3796 executing, target_async_permitted is *not* updated. */
3797 static bool target_async_permitted_1
= true;
3800 maint_set_target_async_command (const char *args
, int from_tty
,
3801 struct cmd_list_element
*c
)
3803 if (have_live_inferiors ())
3805 target_async_permitted_1
= target_async_permitted
;
3806 error (_("Cannot change this setting while the inferior is running."));
3809 target_async_permitted
= target_async_permitted_1
;
3813 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3814 struct cmd_list_element
*c
,
3817 fprintf_filtered (file
,
3818 _("Controlling the inferior in "
3819 "asynchronous mode is %s.\n"), value
);
3822 /* Return true if the target operates in non-stop mode even with "set
3826 target_always_non_stop_p (void)
3828 return current_top_target ()->always_non_stop_p ();
3834 target_is_non_stop_p (void)
3837 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3838 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3839 && target_always_non_stop_p ()));
3845 exists_non_stop_target ()
3847 if (target_is_non_stop_p ())
3850 scoped_restore_current_thread restore_thread
;
3852 for (inferior
*inf
: all_inferiors ())
3854 switch_to_inferior_no_thread (inf
);
3855 if (target_is_non_stop_p ())
3862 /* Controls if targets can report that they always run in non-stop
3863 mode. This is just for maintainers to use when debugging gdb. */
3864 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3866 /* The set command writes to this variable. If the inferior is
3867 executing, target_non_stop_enabled is *not* updated. */
3868 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3870 /* Implementation of "maint set target-non-stop". */
3873 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3874 struct cmd_list_element
*c
)
3876 if (have_live_inferiors ())
3878 target_non_stop_enabled_1
= target_non_stop_enabled
;
3879 error (_("Cannot change this setting while the inferior is running."));
3882 target_non_stop_enabled
= target_non_stop_enabled_1
;
3885 /* Implementation of "maint show target-non-stop". */
3888 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3889 struct cmd_list_element
*c
,
3892 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3893 fprintf_filtered (file
,
3894 _("Whether the target is always in non-stop mode "
3895 "is %s (currently %s).\n"), value
,
3896 target_always_non_stop_p () ? "on" : "off");
3898 fprintf_filtered (file
,
3899 _("Whether the target is always in non-stop mode "
3900 "is %s.\n"), value
);
3903 /* Temporary copies of permission settings. */
3905 static bool may_write_registers_1
= true;
3906 static bool may_write_memory_1
= true;
3907 static bool may_insert_breakpoints_1
= true;
3908 static bool may_insert_tracepoints_1
= true;
3909 static bool may_insert_fast_tracepoints_1
= true;
3910 static bool may_stop_1
= true;
3912 /* Make the user-set values match the real values again. */
3915 update_target_permissions (void)
3917 may_write_registers_1
= may_write_registers
;
3918 may_write_memory_1
= may_write_memory
;
3919 may_insert_breakpoints_1
= may_insert_breakpoints
;
3920 may_insert_tracepoints_1
= may_insert_tracepoints
;
3921 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3922 may_stop_1
= may_stop
;
3925 /* The one function handles (most of) the permission flags in the same
3929 set_target_permissions (const char *args
, int from_tty
,
3930 struct cmd_list_element
*c
)
3932 if (target_has_execution ())
3934 update_target_permissions ();
3935 error (_("Cannot change this setting while the inferior is running."));
3938 /* Make the real values match the user-changed values. */
3939 may_write_registers
= may_write_registers_1
;
3940 may_insert_breakpoints
= may_insert_breakpoints_1
;
3941 may_insert_tracepoints
= may_insert_tracepoints_1
;
3942 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3943 may_stop
= may_stop_1
;
3944 update_observer_mode ();
3947 /* Set memory write permission independently of observer mode. */
3950 set_write_memory_permission (const char *args
, int from_tty
,
3951 struct cmd_list_element
*c
)
3953 /* Make the real values match the user-changed values. */
3954 may_write_memory
= may_write_memory_1
;
3955 update_observer_mode ();
3958 void _initialize_target ();
3961 _initialize_target ()
3963 the_debug_target
= new debug_target ();
3965 add_info ("target", info_target_command
, targ_desc
);
3966 add_info ("files", info_target_command
, targ_desc
);
3968 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3969 Set target debugging."), _("\
3970 Show target debugging."), _("\
3971 When non-zero, target debugging is enabled. Higher numbers are more\n\
3975 &setdebuglist
, &showdebuglist
);
3977 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
3978 &trust_readonly
, _("\
3979 Set mode for reading from readonly sections."), _("\
3980 Show mode for reading from readonly sections."), _("\
3981 When this mode is on, memory reads from readonly sections (such as .text)\n\
3982 will be read from the object file instead of from the target. This will\n\
3983 result in significant performance improvement for remote targets."),
3985 show_trust_readonly
,
3986 &setlist
, &showlist
);
3988 add_com ("monitor", class_obscure
, do_monitor_command
,
3989 _("Send a command to the remote monitor (remote targets only)."));
3991 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
3992 _("Print the name of each layer of the internal target stack."),
3993 &maintenanceprintlist
);
3995 add_setshow_boolean_cmd ("target-async", no_class
,
3996 &target_async_permitted_1
, _("\
3997 Set whether gdb controls the inferior in asynchronous mode."), _("\
3998 Show whether gdb controls the inferior in asynchronous mode."), _("\
3999 Tells gdb whether to control the inferior in asynchronous mode."),
4000 maint_set_target_async_command
,
4001 maint_show_target_async_command
,
4002 &maintenance_set_cmdlist
,
4003 &maintenance_show_cmdlist
);
4005 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4006 &target_non_stop_enabled_1
, _("\
4007 Set whether gdb always controls the inferior in non-stop mode."), _("\
4008 Show whether gdb always controls the inferior in non-stop mode."), _("\
4009 Tells gdb whether to control the inferior in non-stop mode."),
4010 maint_set_target_non_stop_command
,
4011 maint_show_target_non_stop_command
,
4012 &maintenance_set_cmdlist
,
4013 &maintenance_show_cmdlist
);
4015 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4016 &may_write_registers_1
, _("\
4017 Set permission to write into registers."), _("\
4018 Show permission to write into registers."), _("\
4019 When this permission is on, GDB may write into the target's registers.\n\
4020 Otherwise, any sort of write attempt will result in an error."),
4021 set_target_permissions
, NULL
,
4022 &setlist
, &showlist
);
4024 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4025 &may_write_memory_1
, _("\
4026 Set permission to write into target memory."), _("\
4027 Show permission to write into target memory."), _("\
4028 When this permission is on, GDB may write into the target's memory.\n\
4029 Otherwise, any sort of write attempt will result in an error."),
4030 set_write_memory_permission
, NULL
,
4031 &setlist
, &showlist
);
4033 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4034 &may_insert_breakpoints_1
, _("\
4035 Set permission to insert breakpoints in the target."), _("\
4036 Show permission to insert breakpoints in the target."), _("\
4037 When this permission is on, GDB may insert breakpoints in the program.\n\
4038 Otherwise, any sort of insertion attempt will result in an error."),
4039 set_target_permissions
, NULL
,
4040 &setlist
, &showlist
);
4042 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4043 &may_insert_tracepoints_1
, _("\
4044 Set permission to insert tracepoints in the target."), _("\
4045 Show permission to insert tracepoints in the target."), _("\
4046 When this permission is on, GDB may insert tracepoints in the program.\n\
4047 Otherwise, any sort of insertion attempt will result in an error."),
4048 set_target_permissions
, NULL
,
4049 &setlist
, &showlist
);
4051 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4052 &may_insert_fast_tracepoints_1
, _("\
4053 Set permission to insert fast tracepoints in the target."), _("\
4054 Show permission to insert fast tracepoints in the target."), _("\
4055 When this permission is on, GDB may insert fast tracepoints.\n\
4056 Otherwise, any sort of insertion attempt will result in an error."),
4057 set_target_permissions
, NULL
,
4058 &setlist
, &showlist
);
4060 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4062 Set permission to interrupt or signal the target."), _("\
4063 Show permission to interrupt or signal the target."), _("\
4064 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4065 Otherwise, any attempt to interrupt or stop will be ignored."),
4066 set_target_permissions
, NULL
,
4067 &setlist
, &showlist
);
4069 add_com ("flash-erase", no_class
, flash_erase_command
,
4070 _("Erase all flash memory regions."));
4072 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4073 &auto_connect_native_target
, _("\
4074 Set whether GDB may automatically connect to the native target."), _("\
4075 Show whether GDB may automatically connect to the native target."), _("\
4076 When on, and GDB is not connected to a target yet, GDB\n\
4077 attempts \"run\" and other commands with the native target."),
4078 NULL
, show_auto_connect_native_target
,
4079 &setlist
, &showlist
);