1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2020 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
43 #include "gdbsupport/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "gdbsupport/byte-vector.h"
51 #include <unordered_map>
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
55 static void default_terminal_info (struct target_ops
*, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops
*,
58 CORE_ADDR
, CORE_ADDR
, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
63 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
65 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
68 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
71 static void default_mourn_inferior (struct target_ops
*self
);
73 static int default_search_memory (struct target_ops
*ops
,
75 ULONGEST search_space_len
,
76 const gdb_byte
*pattern
,
78 CORE_ADDR
*found_addrp
);
80 static int default_verify_memory (struct target_ops
*self
,
82 CORE_ADDR memaddr
, ULONGEST size
);
84 static void tcomplain (void) ATTRIBUTE_NORETURN
;
86 static struct target_ops
*find_default_run_target (const char *);
88 static int dummy_find_memory_regions (struct target_ops
*self
,
89 find_memory_region_ftype ignore1
,
92 static char *dummy_make_corefile_notes (struct target_ops
*self
,
93 bfd
*ignore1
, int *ignore2
);
95 static std::string
default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
97 static enum exec_direction_kind default_execution_direction
98 (struct target_ops
*self
);
100 /* Mapping between target_info objects (which have address identity)
101 and corresponding open/factory function/callback. Each add_target
102 call adds one entry to this map, and registers a "target
103 TARGET_NAME" command that when invoked calls the factory registered
104 here. The target_info object is associated with the command via
105 the command's context. */
106 static std::unordered_map
<const target_info
*, target_open_ftype
*>
109 /* The singleton debug target. */
111 static struct target_ops
*the_debug_target
;
113 /* The target stack. */
115 static target_stack g_target_stack
;
117 /* Top of target stack. */
118 /* The target structure we are currently using to talk to a process
119 or file or whatever "inferior" we have. */
122 current_top_target ()
124 return g_target_stack
.top ();
127 /* Command list for target. */
129 static struct cmd_list_element
*targetlist
= NULL
;
131 /* True if we should trust readonly sections from the
132 executable when reading memory. */
134 static bool trust_readonly
= false;
136 /* Nonzero if we should show true memory content including
137 memory breakpoint inserted by gdb. */
139 static int show_memory_breakpoints
= 0;
141 /* These globals control whether GDB attempts to perform these
142 operations; they are useful for targets that need to prevent
143 inadvertent disruption, such as in non-stop mode. */
145 bool may_write_registers
= true;
147 bool may_write_memory
= true;
149 bool may_insert_breakpoints
= true;
151 bool may_insert_tracepoints
= true;
153 bool may_insert_fast_tracepoints
= true;
155 bool may_stop
= true;
157 /* Non-zero if we want to see trace of target level stuff. */
159 static unsigned int targetdebug
= 0;
162 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
165 push_target (the_debug_target
);
167 unpush_target (the_debug_target
);
171 show_targetdebug (struct ui_file
*file
, int from_tty
,
172 struct cmd_list_element
*c
, const char *value
)
174 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
177 /* The user just typed 'target' without the name of a target. */
180 target_command (const char *arg
, int from_tty
)
182 fputs_filtered ("Argument required (target name). Try `help target'\n",
187 target_has_all_memory_1 (void)
189 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
190 if (t
->has_all_memory ())
197 target_has_memory_1 (void)
199 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
200 if (t
->has_memory ())
207 target_has_stack_1 (void)
209 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
217 target_has_registers_1 (void)
219 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
220 if (t
->has_registers ())
227 target_has_execution_1 (ptid_t the_ptid
)
229 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
230 if (t
->has_execution (the_ptid
))
237 target_has_execution_current (void)
239 return target_has_execution_1 (inferior_ptid
);
242 /* This is used to implement the various target commands. */
245 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
247 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
248 target_open_ftype
*func
= target_factories
[ti
];
251 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
254 func (args
, from_tty
);
257 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
258 ti
->shortname
, args
, from_tty
);
264 add_target (const target_info
&t
, target_open_ftype
*func
,
265 completer_ftype
*completer
)
267 struct cmd_list_element
*c
;
269 auto &func_slot
= target_factories
[&t
];
270 if (func_slot
!= nullptr)
271 internal_error (__FILE__
, __LINE__
,
272 _("target already added (\"%s\")."), t
.shortname
);
275 if (targetlist
== NULL
)
276 add_prefix_cmd ("target", class_run
, target_command
, _("\
277 Connect to a target machine or process.\n\
278 The first argument is the type or protocol of the target machine.\n\
279 Remaining arguments are interpreted by the target protocol. For more\n\
280 information on the arguments for a particular protocol, type\n\
281 `help target ' followed by the protocol name."),
282 &targetlist
, "target ", 0, &cmdlist
);
283 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
284 set_cmd_context (c
, (void *) &t
);
285 set_cmd_sfunc (c
, open_target
);
286 if (completer
!= NULL
)
287 set_cmd_completer (c
, completer
);
293 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
295 struct cmd_list_element
*c
;
298 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
300 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
301 set_cmd_sfunc (c
, open_target
);
302 set_cmd_context (c
, (void *) &tinfo
);
303 alt
= xstrprintf ("target %s", tinfo
.shortname
);
304 deprecate_cmd (c
, alt
);
312 current_top_target ()->kill ();
316 target_load (const char *arg
, int from_tty
)
318 target_dcache_invalidate ();
319 current_top_target ()->load (arg
, from_tty
);
324 target_terminal_state
target_terminal::m_terminal_state
325 = target_terminal_state::is_ours
;
327 /* See target/target.h. */
330 target_terminal::init (void)
332 current_top_target ()->terminal_init ();
334 m_terminal_state
= target_terminal_state::is_ours
;
337 /* See target/target.h. */
340 target_terminal::inferior (void)
342 struct ui
*ui
= current_ui
;
344 /* A background resume (``run&'') should leave GDB in control of the
346 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
349 /* Since we always run the inferior in the main console (unless "set
350 inferior-tty" is in effect), when some UI other than the main one
351 calls target_terminal::inferior, then we leave the main UI's
352 terminal settings as is. */
356 /* If GDB is resuming the inferior in the foreground, install
357 inferior's terminal modes. */
359 struct inferior
*inf
= current_inferior ();
361 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
363 current_top_target ()->terminal_inferior ();
364 inf
->terminal_state
= target_terminal_state::is_inferior
;
367 m_terminal_state
= target_terminal_state::is_inferior
;
369 /* If the user hit C-c before, pretend that it was hit right
371 if (check_quit_flag ())
372 target_pass_ctrlc ();
375 /* See target/target.h. */
378 target_terminal::restore_inferior (void)
380 struct ui
*ui
= current_ui
;
382 /* See target_terminal::inferior(). */
383 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
386 /* Restore the terminal settings of inferiors that were in the
387 foreground but are now ours_for_output due to a temporary
388 target_target::ours_for_output() call. */
391 scoped_restore_current_inferior restore_inferior
;
393 for (::inferior
*inf
: all_inferiors ())
395 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
397 set_current_inferior (inf
);
398 current_top_target ()->terminal_inferior ();
399 inf
->terminal_state
= target_terminal_state::is_inferior
;
404 m_terminal_state
= target_terminal_state::is_inferior
;
406 /* If the user hit C-c before, pretend that it was hit right
408 if (check_quit_flag ())
409 target_pass_ctrlc ();
412 /* Switch terminal state to DESIRED_STATE, either is_ours, or
413 is_ours_for_output. */
416 target_terminal_is_ours_kind (target_terminal_state desired_state
)
418 scoped_restore_current_inferior restore_inferior
;
420 /* Must do this in two passes. First, have all inferiors save the
421 current terminal settings. Then, after all inferiors have add a
422 chance to safely save the terminal settings, restore GDB's
423 terminal settings. */
425 for (inferior
*inf
: all_inferiors ())
427 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
429 set_current_inferior (inf
);
430 current_top_target ()->terminal_save_inferior ();
434 for (inferior
*inf
: all_inferiors ())
436 /* Note we don't check is_inferior here like above because we
437 need to handle 'is_ours_for_output -> is_ours' too. Careful
438 to never transition from 'is_ours' to 'is_ours_for_output',
440 if (inf
->terminal_state
!= target_terminal_state::is_ours
441 && inf
->terminal_state
!= desired_state
)
443 set_current_inferior (inf
);
444 if (desired_state
== target_terminal_state::is_ours
)
445 current_top_target ()->terminal_ours ();
446 else if (desired_state
== target_terminal_state::is_ours_for_output
)
447 current_top_target ()->terminal_ours_for_output ();
449 gdb_assert_not_reached ("unhandled desired state");
450 inf
->terminal_state
= desired_state
;
455 /* See target/target.h. */
458 target_terminal::ours ()
460 struct ui
*ui
= current_ui
;
462 /* See target_terminal::inferior. */
466 if (m_terminal_state
== target_terminal_state::is_ours
)
469 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
470 m_terminal_state
= target_terminal_state::is_ours
;
473 /* See target/target.h. */
476 target_terminal::ours_for_output ()
478 struct ui
*ui
= current_ui
;
480 /* See target_terminal::inferior. */
484 if (!target_terminal::is_inferior ())
487 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
488 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
491 /* See target/target.h. */
494 target_terminal::info (const char *arg
, int from_tty
)
496 current_top_target ()->terminal_info (arg
, from_tty
);
502 target_supports_terminal_ours (void)
504 /* This can be called before there is any target, so we must check
506 target_ops
*top
= current_top_target ();
510 return top
->supports_terminal_ours ();
516 error (_("You can't do that when your target is `%s'"),
517 current_top_target ()->shortname ());
523 error (_("You can't do that without a process to debug."));
527 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
529 printf_unfiltered (_("No saved terminal information.\n"));
532 /* A default implementation for the to_get_ada_task_ptid target method.
534 This function builds the PTID by using both LWP and TID as part of
535 the PTID lwp and tid elements. The pid used is the pid of the
539 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
541 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
544 static enum exec_direction_kind
545 default_execution_direction (struct target_ops
*self
)
547 if (!target_can_execute_reverse
)
549 else if (!target_can_async_p ())
552 gdb_assert_not_reached ("\
553 to_execution_direction must be implemented for reverse async");
559 target_stack::push (target_ops
*t
)
561 /* If there's already a target at this stratum, remove it. */
562 strata stratum
= t
->stratum ();
564 if (m_stack
[stratum
] != NULL
)
565 unpush (m_stack
[stratum
]);
567 /* Now add the new one. */
568 m_stack
[stratum
] = t
;
577 push_target (struct target_ops
*t
)
579 g_target_stack
.push (t
);
585 push_target (target_ops_up
&&t
)
587 g_target_stack
.push (t
.get ());
594 unpush_target (struct target_ops
*t
)
596 return g_target_stack
.unpush (t
);
602 target_stack::unpush (target_ops
*t
)
604 gdb_assert (t
!= NULL
);
606 strata stratum
= t
->stratum ();
608 if (stratum
== dummy_stratum
)
609 internal_error (__FILE__
, __LINE__
,
610 _("Attempt to unpush the dummy target"));
612 /* Look for the specified target. Note that a target can only occur
613 once in the target stack. */
615 if (m_stack
[stratum
] != t
)
617 /* If T wasn't pushed, quit. Only open targets should be
622 /* Unchain the target. */
623 m_stack
[stratum
] = NULL
;
625 if (m_top
== stratum
)
626 m_top
= t
->beneath ()->stratum ();
628 /* Finally close the target. Note we do this after unchaining, so
629 any target method calls from within the target_close
630 implementation don't end up in T anymore. */
636 /* Unpush TARGET and assert that it worked. */
639 unpush_target_and_assert (struct target_ops
*target
)
641 if (!unpush_target (target
))
643 fprintf_unfiltered (gdb_stderr
,
644 "pop_all_targets couldn't find target %s\n",
645 target
->shortname ());
646 internal_error (__FILE__
, __LINE__
,
647 _("failed internal consistency check"));
652 pop_all_targets_above (enum strata above_stratum
)
654 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum
)
655 unpush_target_and_assert (current_top_target ());
661 pop_all_targets_at_and_above (enum strata stratum
)
663 while ((int) (current_top_target ()->stratum ()) >= (int) stratum
)
664 unpush_target_and_assert (current_top_target ());
668 pop_all_targets (void)
670 pop_all_targets_above (dummy_stratum
);
673 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
676 target_is_pushed (struct target_ops
*t
)
678 return g_target_stack
.is_pushed (t
);
681 /* Default implementation of to_get_thread_local_address. */
684 generic_tls_error (void)
686 throw_error (TLS_GENERIC_ERROR
,
687 _("Cannot find thread-local variables on this target"));
690 /* Using the objfile specified in OBJFILE, find the address for the
691 current thread's thread-local storage with offset OFFSET. */
693 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
695 volatile CORE_ADDR addr
= 0;
696 struct target_ops
*target
= current_top_target ();
697 struct gdbarch
*gdbarch
= target_gdbarch ();
699 if (gdbarch_fetch_tls_load_module_address_p (gdbarch
))
701 ptid_t ptid
= inferior_ptid
;
707 /* Fetch the load module address for this objfile. */
708 lm_addr
= gdbarch_fetch_tls_load_module_address (gdbarch
,
711 if (gdbarch_get_thread_local_address_p (gdbarch
))
712 addr
= gdbarch_get_thread_local_address (gdbarch
, ptid
, lm_addr
,
715 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
717 /* If an error occurred, print TLS related messages here. Otherwise,
718 throw the error to some higher catcher. */
719 catch (const gdb_exception
&ex
)
721 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
725 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
726 error (_("Cannot find thread-local variables "
727 "in this thread library."));
729 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
730 if (objfile_is_library
)
731 error (_("Cannot find shared library `%s' in dynamic"
732 " linker's load module list"), objfile_name (objfile
));
734 error (_("Cannot find executable file `%s' in dynamic"
735 " linker's load module list"), objfile_name (objfile
));
737 case TLS_NOT_ALLOCATED_YET_ERROR
:
738 if (objfile_is_library
)
739 error (_("The inferior has not yet allocated storage for"
740 " thread-local variables in\n"
741 "the shared library `%s'\n"
743 objfile_name (objfile
),
744 target_pid_to_str (ptid
).c_str ());
746 error (_("The inferior has not yet allocated storage for"
747 " thread-local variables in\n"
748 "the executable `%s'\n"
750 objfile_name (objfile
),
751 target_pid_to_str (ptid
).c_str ());
753 case TLS_GENERIC_ERROR
:
754 if (objfile_is_library
)
755 error (_("Cannot find thread-local storage for %s, "
756 "shared library %s:\n%s"),
757 target_pid_to_str (ptid
).c_str (),
758 objfile_name (objfile
), ex
.what ());
760 error (_("Cannot find thread-local storage for %s, "
761 "executable file %s:\n%s"),
762 target_pid_to_str (ptid
).c_str (),
763 objfile_name (objfile
), ex
.what ());
772 error (_("Cannot find thread-local variables on this target"));
778 target_xfer_status_to_string (enum target_xfer_status status
)
780 #define CASE(X) case X: return #X
783 CASE(TARGET_XFER_E_IO
);
784 CASE(TARGET_XFER_UNAVAILABLE
);
793 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
795 /* target_read_string -- read a null terminated string, up to LEN bytes,
796 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
797 Set *STRING to a pointer to malloc'd memory containing the data; the caller
798 is responsible for freeing it. Return the number of bytes successfully
802 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
803 int len
, int *errnop
)
809 int buffer_allocated
;
811 unsigned int nbytes_read
= 0;
815 /* Small for testing. */
816 buffer_allocated
= 4;
817 buffer
= (char *) xmalloc (buffer_allocated
);
822 tlen
= MIN (len
, 4 - (memaddr
& 3));
823 offset
= memaddr
& 3;
825 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
828 /* The transfer request might have crossed the boundary to an
829 unallocated region of memory. Retry the transfer, requesting
833 errcode
= target_read_memory (memaddr
, buf
, 1);
838 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
842 bytes
= bufptr
- buffer
;
843 buffer_allocated
*= 2;
844 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
845 bufptr
= buffer
+ bytes
;
848 for (i
= 0; i
< tlen
; i
++)
850 *bufptr
++ = buf
[i
+ offset
];
851 if (buf
[i
+ offset
] == '\000')
853 nbytes_read
+= i
+ 1;
863 string
->reset (buffer
);
869 struct target_section_table
*
870 target_get_section_table (struct target_ops
*target
)
872 return target
->get_section_table ();
875 /* Find a section containing ADDR. */
877 struct target_section
*
878 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
880 struct target_section_table
*table
= target_get_section_table (target
);
881 struct target_section
*secp
;
886 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
888 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
895 /* Helper for the memory xfer routines. Checks the attributes of the
896 memory region of MEMADDR against the read or write being attempted.
897 If the access is permitted returns true, otherwise returns false.
898 REGION_P is an optional output parameter. If not-NULL, it is
899 filled with a pointer to the memory region of MEMADDR. REG_LEN
900 returns LEN trimmed to the end of the region. This is how much the
901 caller can continue requesting, if the access is permitted. A
902 single xfer request must not straddle memory region boundaries. */
905 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
906 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
907 struct mem_region
**region_p
)
909 struct mem_region
*region
;
911 region
= lookup_mem_region (memaddr
);
913 if (region_p
!= NULL
)
916 switch (region
->attrib
.mode
)
919 if (writebuf
!= NULL
)
929 /* We only support writing to flash during "load" for now. */
930 if (writebuf
!= NULL
)
931 error (_("Writing to flash memory forbidden in this context"));
938 /* region->hi == 0 means there's no upper bound. */
939 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
942 *reg_len
= region
->hi
- memaddr
;
947 /* Read memory from more than one valid target. A core file, for
948 instance, could have some of memory but delegate other bits to
949 the target below it. So, we must manually try all targets. */
951 enum target_xfer_status
952 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
953 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
954 ULONGEST
*xfered_len
)
956 enum target_xfer_status res
;
960 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
961 readbuf
, writebuf
, memaddr
, len
,
963 if (res
== TARGET_XFER_OK
)
966 /* Stop if the target reports that the memory is not available. */
967 if (res
== TARGET_XFER_UNAVAILABLE
)
970 /* We want to continue past core files to executables, but not
971 past a running target's memory. */
972 if (ops
->has_all_memory ())
975 ops
= ops
->beneath ();
979 /* The cache works at the raw memory level. Make sure the cache
980 gets updated with raw contents no matter what kind of memory
981 object was originally being written. Note we do write-through
982 first, so that if it fails, we don't write to the cache contents
983 that never made it to the target. */
985 && inferior_ptid
!= null_ptid
986 && target_dcache_init_p ()
987 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
989 DCACHE
*dcache
= target_dcache_get ();
991 /* Note that writing to an area of memory which wasn't present
992 in the cache doesn't cause it to be loaded in. */
993 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
999 /* Perform a partial memory transfer.
1000 For docs see target.h, to_xfer_partial. */
1002 static enum target_xfer_status
1003 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1004 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1005 ULONGEST len
, ULONGEST
*xfered_len
)
1007 enum target_xfer_status res
;
1009 struct mem_region
*region
;
1010 struct inferior
*inf
;
1012 /* For accesses to unmapped overlay sections, read directly from
1013 files. Must do this first, as MEMADDR may need adjustment. */
1014 if (readbuf
!= NULL
&& overlay_debugging
)
1016 struct obj_section
*section
= find_pc_overlay (memaddr
);
1018 if (pc_in_unmapped_range (memaddr
, section
))
1020 struct target_section_table
*table
1021 = target_get_section_table (ops
);
1022 const char *section_name
= section
->the_bfd_section
->name
;
1024 memaddr
= overlay_mapped_address (memaddr
, section
);
1025 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1026 memaddr
, len
, xfered_len
,
1028 table
->sections_end
,
1033 /* Try the executable files, if "trust-readonly-sections" is set. */
1034 if (readbuf
!= NULL
&& trust_readonly
)
1036 struct target_section
*secp
;
1037 struct target_section_table
*table
;
1039 secp
= target_section_by_addr (ops
, memaddr
);
1041 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
1043 table
= target_get_section_table (ops
);
1044 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1045 memaddr
, len
, xfered_len
,
1047 table
->sections_end
,
1052 /* Try GDB's internal data cache. */
1054 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1056 return TARGET_XFER_E_IO
;
1058 if (inferior_ptid
!= null_ptid
)
1059 inf
= current_inferior ();
1065 /* The dcache reads whole cache lines; that doesn't play well
1066 with reading from a trace buffer, because reading outside of
1067 the collected memory range fails. */
1068 && get_traceframe_number () == -1
1069 && (region
->attrib
.cache
1070 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1071 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1073 DCACHE
*dcache
= target_dcache_get_or_init ();
1075 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1076 reg_len
, xfered_len
);
1079 /* If none of those methods found the memory we wanted, fall back
1080 to a target partial transfer. Normally a single call to
1081 to_xfer_partial is enough; if it doesn't recognize an object
1082 it will call the to_xfer_partial of the next target down.
1083 But for memory this won't do. Memory is the only target
1084 object which can be read from more than one valid target.
1085 A core file, for instance, could have some of memory but
1086 delegate other bits to the target below it. So, we must
1087 manually try all targets. */
1089 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1092 /* If we still haven't got anything, return the last error. We
1097 /* Perform a partial memory transfer. For docs see target.h,
1100 static enum target_xfer_status
1101 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1102 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1103 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1105 enum target_xfer_status res
;
1107 /* Zero length requests are ok and require no work. */
1109 return TARGET_XFER_EOF
;
1111 memaddr
= address_significant (target_gdbarch (), memaddr
);
1113 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1114 breakpoint insns, thus hiding out from higher layers whether
1115 there are software breakpoints inserted in the code stream. */
1116 if (readbuf
!= NULL
)
1118 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1121 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1122 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1126 /* A large write request is likely to be partially satisfied
1127 by memory_xfer_partial_1. We will continually malloc
1128 and free a copy of the entire write request for breakpoint
1129 shadow handling even though we only end up writing a small
1130 subset of it. Cap writes to a limit specified by the target
1131 to mitigate this. */
1132 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1134 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1135 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1136 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1143 scoped_restore_tmpl
<int>
1144 make_scoped_restore_show_memory_breakpoints (int show
)
1146 return make_scoped_restore (&show_memory_breakpoints
, show
);
1149 /* For docs see target.h, to_xfer_partial. */
1151 enum target_xfer_status
1152 target_xfer_partial (struct target_ops
*ops
,
1153 enum target_object object
, const char *annex
,
1154 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1155 ULONGEST offset
, ULONGEST len
,
1156 ULONGEST
*xfered_len
)
1158 enum target_xfer_status retval
;
1160 /* Transfer is done when LEN is zero. */
1162 return TARGET_XFER_EOF
;
1164 if (writebuf
&& !may_write_memory
)
1165 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1166 core_addr_to_string_nz (offset
), plongest (len
));
1170 /* If this is a memory transfer, let the memory-specific code
1171 have a look at it instead. Memory transfers are more
1173 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1174 || object
== TARGET_OBJECT_CODE_MEMORY
)
1175 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1176 writebuf
, offset
, len
, xfered_len
);
1177 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1179 /* Skip/avoid accessing the target if the memory region
1180 attributes block the access. Check this here instead of in
1181 raw_memory_xfer_partial as otherwise we'd end up checking
1182 this twice in the case of the memory_xfer_partial path is
1183 taken; once before checking the dcache, and another in the
1184 tail call to raw_memory_xfer_partial. */
1185 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1187 return TARGET_XFER_E_IO
;
1189 /* Request the normal memory object from other layers. */
1190 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1194 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1195 writebuf
, offset
, len
, xfered_len
);
1199 const unsigned char *myaddr
= NULL
;
1201 fprintf_unfiltered (gdb_stdlog
,
1202 "%s:target_xfer_partial "
1203 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1206 (annex
? annex
: "(null)"),
1207 host_address_to_string (readbuf
),
1208 host_address_to_string (writebuf
),
1209 core_addr_to_string_nz (offset
),
1210 pulongest (len
), retval
,
1211 pulongest (*xfered_len
));
1217 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1221 fputs_unfiltered (", bytes =", gdb_stdlog
);
1222 for (i
= 0; i
< *xfered_len
; i
++)
1224 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1226 if (targetdebug
< 2 && i
> 0)
1228 fprintf_unfiltered (gdb_stdlog
, " ...");
1231 fprintf_unfiltered (gdb_stdlog
, "\n");
1234 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1238 fputc_unfiltered ('\n', gdb_stdlog
);
1241 /* Check implementations of to_xfer_partial update *XFERED_LEN
1242 properly. Do assertion after printing debug messages, so that we
1243 can find more clues on assertion failure from debugging messages. */
1244 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1245 gdb_assert (*xfered_len
> 0);
1250 /* Read LEN bytes of target memory at address MEMADDR, placing the
1251 results in GDB's memory at MYADDR. Returns either 0 for success or
1252 -1 if any error occurs.
1254 If an error occurs, no guarantee is made about the contents of the data at
1255 MYADDR. In particular, the caller should not depend upon partial reads
1256 filling the buffer with good data. There is no way for the caller to know
1257 how much good data might have been transfered anyway. Callers that can
1258 deal with partial reads should call target_read (which will retry until
1259 it makes no progress, and then return how much was transferred). */
1262 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1264 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1265 myaddr
, memaddr
, len
) == len
)
1271 /* See target/target.h. */
1274 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1279 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1282 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1283 gdbarch_byte_order (target_gdbarch ()));
1287 /* Like target_read_memory, but specify explicitly that this is a read
1288 from the target's raw memory. That is, this read bypasses the
1289 dcache, breakpoint shadowing, etc. */
1292 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1294 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1295 myaddr
, memaddr
, len
) == len
)
1301 /* Like target_read_memory, but specify explicitly that this is a read from
1302 the target's stack. This may trigger different cache behavior. */
1305 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1307 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1308 myaddr
, memaddr
, len
) == len
)
1314 /* Like target_read_memory, but specify explicitly that this is a read from
1315 the target's code. This may trigger different cache behavior. */
1318 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1320 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1321 myaddr
, memaddr
, len
) == len
)
1327 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1328 Returns either 0 for success or -1 if any error occurs. If an
1329 error occurs, no guarantee is made about how much data got written.
1330 Callers that can deal with partial writes should call
1334 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1336 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1337 myaddr
, memaddr
, len
) == len
)
1343 /* Write LEN bytes from MYADDR to target raw memory at address
1344 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1345 If an error occurs, no guarantee is made about how much data got
1346 written. Callers that can deal with partial writes should call
1350 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1352 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1353 myaddr
, memaddr
, len
) == len
)
1359 /* Fetch the target's memory map. */
1361 std::vector
<mem_region
>
1362 target_memory_map (void)
1364 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1365 if (result
.empty ())
1368 std::sort (result
.begin (), result
.end ());
1370 /* Check that regions do not overlap. Simultaneously assign
1371 a numbering for the "mem" commands to use to refer to
1373 mem_region
*last_one
= NULL
;
1374 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1376 mem_region
*this_one
= &result
[ix
];
1377 this_one
->number
= ix
;
1379 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1381 warning (_("Overlapping regions in memory map: ignoring"));
1382 return std::vector
<mem_region
> ();
1385 last_one
= this_one
;
1392 target_flash_erase (ULONGEST address
, LONGEST length
)
1394 current_top_target ()->flash_erase (address
, length
);
1398 target_flash_done (void)
1400 current_top_target ()->flash_done ();
1404 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1405 struct cmd_list_element
*c
, const char *value
)
1407 fprintf_filtered (file
,
1408 _("Mode for reading from readonly sections is %s.\n"),
1412 /* Target vector read/write partial wrapper functions. */
1414 static enum target_xfer_status
1415 target_read_partial (struct target_ops
*ops
,
1416 enum target_object object
,
1417 const char *annex
, gdb_byte
*buf
,
1418 ULONGEST offset
, ULONGEST len
,
1419 ULONGEST
*xfered_len
)
1421 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1425 static enum target_xfer_status
1426 target_write_partial (struct target_ops
*ops
,
1427 enum target_object object
,
1428 const char *annex
, const gdb_byte
*buf
,
1429 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1431 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1435 /* Wrappers to perform the full transfer. */
1437 /* For docs on target_read see target.h. */
1440 target_read (struct target_ops
*ops
,
1441 enum target_object object
,
1442 const char *annex
, gdb_byte
*buf
,
1443 ULONGEST offset
, LONGEST len
)
1445 LONGEST xfered_total
= 0;
1448 /* If we are reading from a memory object, find the length of an addressable
1449 unit for that architecture. */
1450 if (object
== TARGET_OBJECT_MEMORY
1451 || object
== TARGET_OBJECT_STACK_MEMORY
1452 || object
== TARGET_OBJECT_CODE_MEMORY
1453 || object
== TARGET_OBJECT_RAW_MEMORY
)
1454 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1456 while (xfered_total
< len
)
1458 ULONGEST xfered_partial
;
1459 enum target_xfer_status status
;
1461 status
= target_read_partial (ops
, object
, annex
,
1462 buf
+ xfered_total
* unit_size
,
1463 offset
+ xfered_total
, len
- xfered_total
,
1466 /* Call an observer, notifying them of the xfer progress? */
1467 if (status
== TARGET_XFER_EOF
)
1468 return xfered_total
;
1469 else if (status
== TARGET_XFER_OK
)
1471 xfered_total
+= xfered_partial
;
1475 return TARGET_XFER_E_IO
;
1481 /* Assuming that the entire [begin, end) range of memory cannot be
1482 read, try to read whatever subrange is possible to read.
1484 The function returns, in RESULT, either zero or one memory block.
1485 If there's a readable subrange at the beginning, it is completely
1486 read and returned. Any further readable subrange will not be read.
1487 Otherwise, if there's a readable subrange at the end, it will be
1488 completely read and returned. Any readable subranges before it
1489 (obviously, not starting at the beginning), will be ignored. In
1490 other cases -- either no readable subrange, or readable subrange(s)
1491 that is neither at the beginning, or end, nothing is returned.
1493 The purpose of this function is to handle a read across a boundary
1494 of accessible memory in a case when memory map is not available.
1495 The above restrictions are fine for this case, but will give
1496 incorrect results if the memory is 'patchy'. However, supporting
1497 'patchy' memory would require trying to read every single byte,
1498 and it seems unacceptable solution. Explicit memory map is
1499 recommended for this case -- and target_read_memory_robust will
1500 take care of reading multiple ranges then. */
1503 read_whatever_is_readable (struct target_ops
*ops
,
1504 const ULONGEST begin
, const ULONGEST end
,
1506 std::vector
<memory_read_result
> *result
)
1508 ULONGEST current_begin
= begin
;
1509 ULONGEST current_end
= end
;
1511 ULONGEST xfered_len
;
1513 /* If we previously failed to read 1 byte, nothing can be done here. */
1514 if (end
- begin
<= 1)
1517 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1519 /* Check that either first or the last byte is readable, and give up
1520 if not. This heuristic is meant to permit reading accessible memory
1521 at the boundary of accessible region. */
1522 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1523 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1528 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1529 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1530 &xfered_len
) == TARGET_XFER_OK
)
1538 /* Loop invariant is that the [current_begin, current_end) was previously
1539 found to be not readable as a whole.
1541 Note loop condition -- if the range has 1 byte, we can't divide the range
1542 so there's no point trying further. */
1543 while (current_end
- current_begin
> 1)
1545 ULONGEST first_half_begin
, first_half_end
;
1546 ULONGEST second_half_begin
, second_half_end
;
1548 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1552 first_half_begin
= current_begin
;
1553 first_half_end
= middle
;
1554 second_half_begin
= middle
;
1555 second_half_end
= current_end
;
1559 first_half_begin
= middle
;
1560 first_half_end
= current_end
;
1561 second_half_begin
= current_begin
;
1562 second_half_end
= middle
;
1565 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1566 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1568 first_half_end
- first_half_begin
);
1570 if (xfer
== first_half_end
- first_half_begin
)
1572 /* This half reads up fine. So, the error must be in the
1574 current_begin
= second_half_begin
;
1575 current_end
= second_half_end
;
1579 /* This half is not readable. Because we've tried one byte, we
1580 know some part of this half if actually readable. Go to the next
1581 iteration to divide again and try to read.
1583 We don't handle the other half, because this function only tries
1584 to read a single readable subrange. */
1585 current_begin
= first_half_begin
;
1586 current_end
= first_half_end
;
1592 /* The [begin, current_begin) range has been read. */
1593 result
->emplace_back (begin
, current_end
, std::move (buf
));
1597 /* The [current_end, end) range has been read. */
1598 LONGEST region_len
= end
- current_end
;
1600 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1601 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1602 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1603 region_len
* unit_size
);
1604 result
->emplace_back (current_end
, end
, std::move (data
));
1608 std::vector
<memory_read_result
>
1609 read_memory_robust (struct target_ops
*ops
,
1610 const ULONGEST offset
, const LONGEST len
)
1612 std::vector
<memory_read_result
> result
;
1613 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1615 LONGEST xfered_total
= 0;
1616 while (xfered_total
< len
)
1618 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1621 /* If there is no explicit region, a fake one should be created. */
1622 gdb_assert (region
);
1624 if (region
->hi
== 0)
1625 region_len
= len
- xfered_total
;
1627 region_len
= region
->hi
- offset
;
1629 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1631 /* Cannot read this region. Note that we can end up here only
1632 if the region is explicitly marked inaccessible, or
1633 'inaccessible-by-default' is in effect. */
1634 xfered_total
+= region_len
;
1638 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1639 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1640 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1642 LONGEST xfered_partial
=
1643 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1644 offset
+ xfered_total
, to_read
);
1645 /* Call an observer, notifying them of the xfer progress? */
1646 if (xfered_partial
<= 0)
1648 /* Got an error reading full chunk. See if maybe we can read
1650 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1651 offset
+ xfered_total
+ to_read
,
1652 unit_size
, &result
);
1653 xfered_total
+= to_read
;
1657 result
.emplace_back (offset
+ xfered_total
,
1658 offset
+ xfered_total
+ xfered_partial
,
1659 std::move (buffer
));
1660 xfered_total
+= xfered_partial
;
1670 /* An alternative to target_write with progress callbacks. */
1673 target_write_with_progress (struct target_ops
*ops
,
1674 enum target_object object
,
1675 const char *annex
, const gdb_byte
*buf
,
1676 ULONGEST offset
, LONGEST len
,
1677 void (*progress
) (ULONGEST
, void *), void *baton
)
1679 LONGEST xfered_total
= 0;
1682 /* If we are writing to a memory object, find the length of an addressable
1683 unit for that architecture. */
1684 if (object
== TARGET_OBJECT_MEMORY
1685 || object
== TARGET_OBJECT_STACK_MEMORY
1686 || object
== TARGET_OBJECT_CODE_MEMORY
1687 || object
== TARGET_OBJECT_RAW_MEMORY
)
1688 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1690 /* Give the progress callback a chance to set up. */
1692 (*progress
) (0, baton
);
1694 while (xfered_total
< len
)
1696 ULONGEST xfered_partial
;
1697 enum target_xfer_status status
;
1699 status
= target_write_partial (ops
, object
, annex
,
1700 buf
+ xfered_total
* unit_size
,
1701 offset
+ xfered_total
, len
- xfered_total
,
1704 if (status
!= TARGET_XFER_OK
)
1705 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1708 (*progress
) (xfered_partial
, baton
);
1710 xfered_total
+= xfered_partial
;
1716 /* For docs on target_write see target.h. */
1719 target_write (struct target_ops
*ops
,
1720 enum target_object object
,
1721 const char *annex
, const gdb_byte
*buf
,
1722 ULONGEST offset
, LONGEST len
)
1724 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1728 /* Help for target_read_alloc and target_read_stralloc. See their comments
1731 template <typename T
>
1732 gdb::optional
<gdb::def_vector
<T
>>
1733 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1736 gdb::def_vector
<T
> buf
;
1738 const int chunk
= 4096;
1740 /* This function does not have a length parameter; it reads the
1741 entire OBJECT). Also, it doesn't support objects fetched partly
1742 from one target and partly from another (in a different stratum,
1743 e.g. a core file and an executable). Both reasons make it
1744 unsuitable for reading memory. */
1745 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1747 /* Start by reading up to 4K at a time. The target will throttle
1748 this number down if necessary. */
1751 ULONGEST xfered_len
;
1752 enum target_xfer_status status
;
1754 buf
.resize (buf_pos
+ chunk
);
1756 status
= target_read_partial (ops
, object
, annex
,
1757 (gdb_byte
*) &buf
[buf_pos
],
1761 if (status
== TARGET_XFER_EOF
)
1763 /* Read all there was. */
1764 buf
.resize (buf_pos
);
1767 else if (status
!= TARGET_XFER_OK
)
1769 /* An error occurred. */
1773 buf_pos
+= xfered_len
;
1781 gdb::optional
<gdb::byte_vector
>
1782 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1785 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1790 gdb::optional
<gdb::char_vector
>
1791 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1794 gdb::optional
<gdb::char_vector
> buf
1795 = target_read_alloc_1
<char> (ops
, object
, annex
);
1800 if (buf
->empty () || buf
->back () != '\0')
1801 buf
->push_back ('\0');
1803 /* Check for embedded NUL bytes; but allow trailing NULs. */
1804 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1805 it
!= buf
->end (); it
++)
1808 warning (_("target object %d, annex %s, "
1809 "contained unexpected null characters"),
1810 (int) object
, annex
? annex
: "(none)");
1817 /* Memory transfer methods. */
1820 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1823 /* This method is used to read from an alternate, non-current
1824 target. This read must bypass the overlay support (as symbols
1825 don't match this target), and GDB's internal cache (wrong cache
1826 for this target). */
1827 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1829 memory_error (TARGET_XFER_E_IO
, addr
);
1833 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1834 int len
, enum bfd_endian byte_order
)
1836 gdb_byte buf
[sizeof (ULONGEST
)];
1838 gdb_assert (len
<= sizeof (buf
));
1839 get_target_memory (ops
, addr
, buf
, len
);
1840 return extract_unsigned_integer (buf
, len
, byte_order
);
1846 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1847 struct bp_target_info
*bp_tgt
)
1849 if (!may_insert_breakpoints
)
1851 warning (_("May not insert breakpoints"));
1855 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1861 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1862 struct bp_target_info
*bp_tgt
,
1863 enum remove_bp_reason reason
)
1865 /* This is kind of a weird case to handle, but the permission might
1866 have been changed after breakpoints were inserted - in which case
1867 we should just take the user literally and assume that any
1868 breakpoints should be left in place. */
1869 if (!may_insert_breakpoints
)
1871 warning (_("May not remove breakpoints"));
1875 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1879 info_target_command (const char *args
, int from_tty
)
1881 int has_all_mem
= 0;
1883 if (symfile_objfile
!= NULL
)
1884 printf_unfiltered (_("Symbols from \"%s\".\n"),
1885 objfile_name (symfile_objfile
));
1887 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1889 if (!t
->has_memory ())
1892 if ((int) (t
->stratum ()) <= (int) dummy_stratum
)
1895 printf_unfiltered (_("\tWhile running this, "
1896 "GDB does not access memory from...\n"));
1897 printf_unfiltered ("%s:\n", t
->longname ());
1899 has_all_mem
= t
->has_all_memory ();
1903 /* This function is called before any new inferior is created, e.g.
1904 by running a program, attaching, or connecting to a target.
1905 It cleans up any state from previous invocations which might
1906 change between runs. This is a subset of what target_preopen
1907 resets (things which might change between targets). */
1910 target_pre_inferior (int from_tty
)
1912 /* Clear out solib state. Otherwise the solib state of the previous
1913 inferior might have survived and is entirely wrong for the new
1914 target. This has been observed on GNU/Linux using glibc 2.3. How
1926 Cannot access memory at address 0xdeadbeef
1929 /* In some OSs, the shared library list is the same/global/shared
1930 across inferiors. If code is shared between processes, so are
1931 memory regions and features. */
1932 if (!gdbarch_has_global_solist (target_gdbarch ()))
1934 no_shared_libraries (NULL
, from_tty
);
1936 invalidate_target_mem_regions ();
1938 target_clear_description ();
1941 /* attach_flag may be set if the previous process associated with
1942 the inferior was attached to. */
1943 current_inferior ()->attach_flag
= 0;
1945 current_inferior ()->highest_thread_num
= 0;
1947 agent_capability_invalidate ();
1950 /* Callback for iterate_over_inferiors. Gets rid of the given
1954 dispose_inferior (struct inferior
*inf
, void *args
)
1956 /* Not all killed inferiors can, or will ever be, removed from the
1957 inferior list. Killed inferiors clearly don't need to be killed
1958 again, so, we're done. */
1962 thread_info
*thread
= any_thread_of_inferior (inf
);
1965 switch_to_thread (thread
);
1967 /* Core inferiors actually should be detached, not killed. */
1968 if (target_has_execution
)
1971 target_detach (inf
, 0);
1977 /* This is to be called by the open routine before it does
1981 target_preopen (int from_tty
)
1985 if (have_inferiors ())
1988 || !have_live_inferiors ()
1989 || query (_("A program is being debugged already. Kill it? ")))
1990 iterate_over_inferiors (dispose_inferior
, NULL
);
1992 error (_("Program not killed."));
1995 /* Calling target_kill may remove the target from the stack. But if
1996 it doesn't (which seems like a win for UDI), remove it now. */
1997 /* Leave the exec target, though. The user may be switching from a
1998 live process to a core of the same program. */
1999 pop_all_targets_above (file_stratum
);
2001 target_pre_inferior (from_tty
);
2007 target_detach (inferior
*inf
, int from_tty
)
2009 /* After we have detached, we will clear the register cache for this inferior
2010 by calling registers_changed_ptid. We must save the pid_ptid before
2011 detaching, as the target detach method will clear inf->pid. */
2012 ptid_t save_pid_ptid
= ptid_t (inf
->pid
);
2014 /* As long as some to_detach implementations rely on the current_inferior
2015 (either directly, or indirectly, like through target_gdbarch or by
2016 reading memory), INF needs to be the current inferior. When that
2017 requirement will become no longer true, then we can remove this
2019 gdb_assert (inf
== current_inferior ());
2021 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2022 /* Don't remove global breakpoints here. They're removed on
2023 disconnection from the target. */
2026 /* If we're in breakpoints-always-inserted mode, have to remove
2027 breakpoints before detaching. */
2028 remove_breakpoints_inf (current_inferior ());
2030 prepare_for_detach ();
2032 current_top_target ()->detach (inf
, from_tty
);
2034 registers_changed_ptid (save_pid_ptid
);
2036 /* We have to ensure we have no frame cache left. Normally,
2037 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2038 inferior_ptid matches save_pid_ptid, but in our case, it does not
2039 call it, as inferior_ptid has been reset. */
2040 reinit_frame_cache ();
2044 target_disconnect (const char *args
, int from_tty
)
2046 /* If we're in breakpoints-always-inserted mode or if breakpoints
2047 are global across processes, we have to remove them before
2049 remove_breakpoints ();
2051 current_top_target ()->disconnect (args
, from_tty
);
2054 /* See target/target.h. */
2057 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2059 return current_top_target ()->wait (ptid
, status
, options
);
2065 default_target_wait (struct target_ops
*ops
,
2066 ptid_t ptid
, struct target_waitstatus
*status
,
2069 status
->kind
= TARGET_WAITKIND_IGNORE
;
2070 return minus_one_ptid
;
2074 target_pid_to_str (ptid_t ptid
)
2076 return current_top_target ()->pid_to_str (ptid
);
2080 target_thread_name (struct thread_info
*info
)
2082 return current_top_target ()->thread_name (info
);
2085 struct thread_info
*
2086 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2088 struct inferior
*inf
)
2090 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2097 target_thread_info_to_thread_handle (struct thread_info
*tip
)
2099 return current_top_target ()->thread_info_to_thread_handle (tip
);
2103 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2105 target_dcache_invalidate ();
2107 current_top_target ()->resume (ptid
, step
, signal
);
2109 registers_changed_ptid (ptid
);
2110 /* We only set the internal executing state here. The user/frontend
2111 running state is set at a higher level. This also clears the
2112 thread's stop_pc as side effect. */
2113 set_executing (ptid
, 1);
2114 clear_inline_frame_state (ptid
);
2117 /* If true, target_commit_resume is a nop. */
2118 static int defer_target_commit_resume
;
2123 target_commit_resume (void)
2125 if (defer_target_commit_resume
)
2127 current_top_target ()->pending_commit_resume
= true;
2131 current_top_target ()->pending_commit_resume
= false;
2132 current_top_target ()->commit_resume ();
2137 scoped_restore_tmpl
<int>
2138 make_scoped_defer_target_commit_resume ()
2140 return make_scoped_restore (&defer_target_commit_resume
, 1);
2144 target_pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2146 current_top_target ()->pass_signals (pass_signals
);
2150 target_program_signals (gdb::array_view
<const unsigned char> program_signals
)
2152 current_top_target ()->program_signals (program_signals
);
2156 default_follow_fork (struct target_ops
*self
, int follow_child
,
2159 /* Some target returned a fork event, but did not know how to follow it. */
2160 internal_error (__FILE__
, __LINE__
,
2161 _("could not find a target to follow fork"));
2164 /* Look through the list of possible targets for a target that can
2168 target_follow_fork (int follow_child
, int detach_fork
)
2170 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2173 /* Target wrapper for follow exec hook. */
2176 target_follow_exec (struct inferior
*inf
, const char *execd_pathname
)
2178 current_top_target ()->follow_exec (inf
, execd_pathname
);
2182 default_mourn_inferior (struct target_ops
*self
)
2184 internal_error (__FILE__
, __LINE__
,
2185 _("could not find a target to follow mourn inferior"));
2189 target_mourn_inferior (ptid_t ptid
)
2191 gdb_assert (ptid
== inferior_ptid
);
2192 current_top_target ()->mourn_inferior ();
2194 /* We no longer need to keep handles on any of the object files.
2195 Make sure to release them to avoid unnecessarily locking any
2196 of them while we're not actually debugging. */
2197 bfd_cache_close_all ();
2200 /* Look for a target which can describe architectural features, starting
2201 from TARGET. If we find one, return its description. */
2203 const struct target_desc
*
2204 target_read_description (struct target_ops
*target
)
2206 return target
->read_description ();
2209 /* This implements a basic search of memory, reading target memory and
2210 performing the search here (as opposed to performing the search in on the
2211 target side with, for example, gdbserver). */
2214 simple_search_memory (struct target_ops
*ops
,
2215 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2216 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2217 CORE_ADDR
*found_addrp
)
2219 /* NOTE: also defined in find.c testcase. */
2220 #define SEARCH_CHUNK_SIZE 16000
2221 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2222 /* Buffer to hold memory contents for searching. */
2223 unsigned search_buf_size
;
2225 search_buf_size
= chunk_size
+ pattern_len
- 1;
2227 /* No point in trying to allocate a buffer larger than the search space. */
2228 if (search_space_len
< search_buf_size
)
2229 search_buf_size
= search_space_len
;
2231 gdb::byte_vector
search_buf (search_buf_size
);
2233 /* Prime the search buffer. */
2235 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2236 search_buf
.data (), start_addr
, search_buf_size
)
2239 warning (_("Unable to access %s bytes of target "
2240 "memory at %s, halting search."),
2241 pulongest (search_buf_size
), hex_string (start_addr
));
2245 /* Perform the search.
2247 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2248 When we've scanned N bytes we copy the trailing bytes to the start and
2249 read in another N bytes. */
2251 while (search_space_len
>= pattern_len
)
2253 gdb_byte
*found_ptr
;
2254 unsigned nr_search_bytes
2255 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2257 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2258 pattern
, pattern_len
);
2260 if (found_ptr
!= NULL
)
2262 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2264 *found_addrp
= found_addr
;
2268 /* Not found in this chunk, skip to next chunk. */
2270 /* Don't let search_space_len wrap here, it's unsigned. */
2271 if (search_space_len
>= chunk_size
)
2272 search_space_len
-= chunk_size
;
2274 search_space_len
= 0;
2276 if (search_space_len
>= pattern_len
)
2278 unsigned keep_len
= search_buf_size
- chunk_size
;
2279 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2282 /* Copy the trailing part of the previous iteration to the front
2283 of the buffer for the next iteration. */
2284 gdb_assert (keep_len
== pattern_len
- 1);
2285 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2287 nr_to_read
= std::min (search_space_len
- keep_len
,
2288 (ULONGEST
) chunk_size
);
2290 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2291 &search_buf
[keep_len
], read_addr
,
2292 nr_to_read
) != nr_to_read
)
2294 warning (_("Unable to access %s bytes of target "
2295 "memory at %s, halting search."),
2296 plongest (nr_to_read
),
2297 hex_string (read_addr
));
2301 start_addr
+= chunk_size
;
2310 /* Default implementation of memory-searching. */
2313 default_search_memory (struct target_ops
*self
,
2314 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2315 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2316 CORE_ADDR
*found_addrp
)
2318 /* Start over from the top of the target stack. */
2319 return simple_search_memory (current_top_target (),
2320 start_addr
, search_space_len
,
2321 pattern
, pattern_len
, found_addrp
);
2324 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2325 sequence of bytes in PATTERN with length PATTERN_LEN.
2327 The result is 1 if found, 0 if not found, and -1 if there was an error
2328 requiring halting of the search (e.g. memory read error).
2329 If the pattern is found the address is recorded in FOUND_ADDRP. */
2332 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2333 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2334 CORE_ADDR
*found_addrp
)
2336 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2337 pattern
, pattern_len
, found_addrp
);
2340 /* Look through the currently pushed targets. If none of them will
2341 be able to restart the currently running process, issue an error
2345 target_require_runnable (void)
2347 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2349 /* If this target knows how to create a new program, then
2350 assume we will still be able to after killing the current
2351 one. Either killing and mourning will not pop T, or else
2352 find_default_run_target will find it again. */
2353 if (t
->can_create_inferior ())
2356 /* Do not worry about targets at certain strata that can not
2357 create inferiors. Assume they will be pushed again if
2358 necessary, and continue to the process_stratum. */
2359 if (t
->stratum () > process_stratum
)
2362 error (_("The \"%s\" target does not support \"run\". "
2363 "Try \"help target\" or \"continue\"."),
2367 /* This function is only called if the target is running. In that
2368 case there should have been a process_stratum target and it
2369 should either know how to create inferiors, or not... */
2370 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2373 /* Whether GDB is allowed to fall back to the default run target for
2374 "run", "attach", etc. when no target is connected yet. */
2375 static bool auto_connect_native_target
= true;
2378 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2379 struct cmd_list_element
*c
, const char *value
)
2381 fprintf_filtered (file
,
2382 _("Whether GDB may automatically connect to the "
2383 "native target is %s.\n"),
2387 /* A pointer to the target that can respond to "run" or "attach".
2388 Native targets are always singletons and instantiated early at GDB
2390 static target_ops
*the_native_target
;
2395 set_native_target (target_ops
*target
)
2397 if (the_native_target
!= NULL
)
2398 internal_error (__FILE__
, __LINE__
,
2399 _("native target already set (\"%s\")."),
2400 the_native_target
->longname ());
2402 the_native_target
= target
;
2408 get_native_target ()
2410 return the_native_target
;
2413 /* Look through the list of possible targets for a target that can
2414 execute a run or attach command without any other data. This is
2415 used to locate the default process stratum.
2417 If DO_MESG is not NULL, the result is always valid (error() is
2418 called for errors); else, return NULL on error. */
2420 static struct target_ops
*
2421 find_default_run_target (const char *do_mesg
)
2423 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2424 return the_native_target
;
2426 if (do_mesg
!= NULL
)
2427 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2434 find_attach_target (void)
2436 /* If a target on the current stack can attach, use it. */
2437 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2439 if (t
->can_attach ())
2443 /* Otherwise, use the default run target for attaching. */
2444 return find_default_run_target ("attach");
2450 find_run_target (void)
2452 /* If a target on the current stack can run, use it. */
2453 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2455 if (t
->can_create_inferior ())
2459 /* Otherwise, use the default run target. */
2460 return find_default_run_target ("run");
2464 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2469 /* Implement the "info proc" command. */
2472 target_info_proc (const char *args
, enum info_proc_what what
)
2474 struct target_ops
*t
;
2476 /* If we're already connected to something that can get us OS
2477 related data, use it. Otherwise, try using the native
2479 t
= find_target_at (process_stratum
);
2481 t
= find_default_run_target (NULL
);
2483 for (; t
!= NULL
; t
= t
->beneath ())
2485 if (t
->info_proc (args
, what
))
2488 fprintf_unfiltered (gdb_stdlog
,
2489 "target_info_proc (\"%s\", %d)\n", args
, what
);
2499 find_default_supports_disable_randomization (struct target_ops
*self
)
2501 struct target_ops
*t
;
2503 t
= find_default_run_target (NULL
);
2505 return t
->supports_disable_randomization ();
2510 target_supports_disable_randomization (void)
2512 return current_top_target ()->supports_disable_randomization ();
2515 /* See target/target.h. */
2518 target_supports_multi_process (void)
2520 return current_top_target ()->supports_multi_process ();
2525 gdb::optional
<gdb::char_vector
>
2526 target_get_osdata (const char *type
)
2528 struct target_ops
*t
;
2530 /* If we're already connected to something that can get us OS
2531 related data, use it. Otherwise, try using the native
2533 t
= find_target_at (process_stratum
);
2535 t
= find_default_run_target ("get OS data");
2540 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2544 /* Determine the current address space of thread PTID. */
2546 struct address_space
*
2547 target_thread_address_space (ptid_t ptid
)
2549 struct address_space
*aspace
;
2551 aspace
= current_top_target ()->thread_address_space (ptid
);
2552 gdb_assert (aspace
!= NULL
);
2560 target_ops::beneath () const
2562 return g_target_stack
.find_beneath (this);
2566 target_ops::close ()
2571 target_ops::can_attach ()
2577 target_ops::attach (const char *, int)
2579 gdb_assert_not_reached ("target_ops::attach called");
2583 target_ops::can_create_inferior ()
2589 target_ops::create_inferior (const char *, const std::string
&,
2592 gdb_assert_not_reached ("target_ops::create_inferior called");
2596 target_ops::can_run ()
2604 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2613 /* Target file operations. */
2615 static struct target_ops
*
2616 default_fileio_target (void)
2618 struct target_ops
*t
;
2620 /* If we're already connected to something that can perform
2621 file I/O, use it. Otherwise, try using the native target. */
2622 t
= find_target_at (process_stratum
);
2625 return find_default_run_target ("file I/O");
2628 /* File handle for target file operations. */
2632 /* The target on which this file is open. NULL if the target is
2633 meanwhile closed while the handle is open. */
2636 /* The file descriptor on the target. */
2639 /* Check whether this fileio_fh_t represents a closed file. */
2642 return target_fd
< 0;
2646 /* Vector of currently open file handles. The value returned by
2647 target_fileio_open and passed as the FD argument to other
2648 target_fileio_* functions is an index into this vector. This
2649 vector's entries are never freed; instead, files are marked as
2650 closed, and the handle becomes available for reuse. */
2651 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2653 /* Index into fileio_fhandles of the lowest handle that might be
2654 closed. This permits handle reuse without searching the whole
2655 list each time a new file is opened. */
2656 static int lowest_closed_fd
;
2658 /* Invalidate the target associated with open handles that were open
2659 on target TARG, since we're about to close (and maybe destroy) the
2660 target. The handles remain open from the client's perspective, but
2661 trying to do anything with them other than closing them will fail
2665 fileio_handles_invalidate_target (target_ops
*targ
)
2667 for (fileio_fh_t
&fh
: fileio_fhandles
)
2668 if (fh
.target
== targ
)
2672 /* Acquire a target fileio file descriptor. */
2675 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2677 /* Search for closed handles to reuse. */
2678 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2680 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2682 if (fh
.is_closed ())
2686 /* Push a new handle if no closed handles were found. */
2687 if (lowest_closed_fd
== fileio_fhandles
.size ())
2688 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2690 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2692 /* Should no longer be marked closed. */
2693 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2695 /* Return its index, and start the next lookup at
2697 return lowest_closed_fd
++;
2700 /* Release a target fileio file descriptor. */
2703 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2706 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2709 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2711 static fileio_fh_t
*
2712 fileio_fd_to_fh (int fd
)
2714 return &fileio_fhandles
[fd
];
2718 /* Default implementations of file i/o methods. We don't want these
2719 to delegate automatically, because we need to know which target
2720 supported the method, in order to call it directly from within
2721 pread/pwrite, etc. */
2724 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2725 int flags
, int mode
, int warn_if_slow
,
2728 *target_errno
= FILEIO_ENOSYS
;
2733 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2734 ULONGEST offset
, int *target_errno
)
2736 *target_errno
= FILEIO_ENOSYS
;
2741 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2742 ULONGEST offset
, int *target_errno
)
2744 *target_errno
= FILEIO_ENOSYS
;
2749 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2751 *target_errno
= FILEIO_ENOSYS
;
2756 target_ops::fileio_close (int fd
, int *target_errno
)
2758 *target_errno
= FILEIO_ENOSYS
;
2763 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2766 *target_errno
= FILEIO_ENOSYS
;
2770 gdb::optional
<std::string
>
2771 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2774 *target_errno
= FILEIO_ENOSYS
;
2778 /* Helper for target_fileio_open and
2779 target_fileio_open_warn_if_slow. */
2782 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2783 int flags
, int mode
, int warn_if_slow
,
2786 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2788 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2789 warn_if_slow
, target_errno
);
2791 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2797 fd
= acquire_fileio_fd (t
, fd
);
2800 fprintf_unfiltered (gdb_stdlog
,
2801 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2803 inf
== NULL
? 0 : inf
->num
,
2804 filename
, flags
, mode
,
2806 fd
!= -1 ? 0 : *target_errno
);
2810 *target_errno
= FILEIO_ENOSYS
;
2817 target_fileio_open (struct inferior
*inf
, const char *filename
,
2818 int flags
, int mode
, int *target_errno
)
2820 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2827 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2828 const char *filename
,
2829 int flags
, int mode
, int *target_errno
)
2831 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2838 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2839 ULONGEST offset
, int *target_errno
)
2841 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2844 if (fh
->is_closed ())
2845 *target_errno
= EBADF
;
2846 else if (fh
->target
== NULL
)
2847 *target_errno
= EIO
;
2849 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2850 len
, offset
, target_errno
);
2853 fprintf_unfiltered (gdb_stdlog
,
2854 "target_fileio_pwrite (%d,...,%d,%s) "
2856 fd
, len
, pulongest (offset
),
2857 ret
, ret
!= -1 ? 0 : *target_errno
);
2864 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2865 ULONGEST offset
, int *target_errno
)
2867 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2870 if (fh
->is_closed ())
2871 *target_errno
= EBADF
;
2872 else if (fh
->target
== NULL
)
2873 *target_errno
= EIO
;
2875 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2876 len
, offset
, target_errno
);
2879 fprintf_unfiltered (gdb_stdlog
,
2880 "target_fileio_pread (%d,...,%d,%s) "
2882 fd
, len
, pulongest (offset
),
2883 ret
, ret
!= -1 ? 0 : *target_errno
);
2890 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2892 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2895 if (fh
->is_closed ())
2896 *target_errno
= EBADF
;
2897 else if (fh
->target
== NULL
)
2898 *target_errno
= EIO
;
2900 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2903 fprintf_unfiltered (gdb_stdlog
,
2904 "target_fileio_fstat (%d) = %d (%d)\n",
2905 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2912 target_fileio_close (int fd
, int *target_errno
)
2914 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2917 if (fh
->is_closed ())
2918 *target_errno
= EBADF
;
2921 if (fh
->target
!= NULL
)
2922 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2926 release_fileio_fd (fd
, fh
);
2930 fprintf_unfiltered (gdb_stdlog
,
2931 "target_fileio_close (%d) = %d (%d)\n",
2932 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2939 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
2942 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2944 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
2946 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
2950 fprintf_unfiltered (gdb_stdlog
,
2951 "target_fileio_unlink (%d,%s)"
2953 inf
== NULL
? 0 : inf
->num
, filename
,
2954 ret
, ret
!= -1 ? 0 : *target_errno
);
2958 *target_errno
= FILEIO_ENOSYS
;
2964 gdb::optional
<std::string
>
2965 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
2968 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2970 gdb::optional
<std::string
> ret
2971 = t
->fileio_readlink (inf
, filename
, target_errno
);
2973 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
2977 fprintf_unfiltered (gdb_stdlog
,
2978 "target_fileio_readlink (%d,%s)"
2980 inf
== NULL
? 0 : inf
->num
,
2981 filename
, ret
? ret
->c_str () : "(nil)",
2982 ret
? 0 : *target_errno
);
2986 *target_errno
= FILEIO_ENOSYS
;
2990 /* Like scoped_fd, but specific to target fileio. */
2992 class scoped_target_fd
2995 explicit scoped_target_fd (int fd
) noexcept
3000 ~scoped_target_fd ()
3006 target_fileio_close (m_fd
, &target_errno
);
3010 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3012 int get () const noexcept
3021 /* Read target file FILENAME, in the filesystem as seen by INF. If
3022 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3023 remote targets, the remote stub). Store the result in *BUF_P and
3024 return the size of the transferred data. PADDING additional bytes
3025 are available in *BUF_P. This is a helper function for
3026 target_fileio_read_alloc; see the declaration of that function for
3027 more information. */
3030 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3031 gdb_byte
**buf_p
, int padding
)
3033 size_t buf_alloc
, buf_pos
;
3038 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3039 0700, &target_errno
));
3040 if (fd
.get () == -1)
3043 /* Start by reading up to 4K at a time. The target will throttle
3044 this number down if necessary. */
3046 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3050 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3051 buf_alloc
- buf_pos
- padding
, buf_pos
,
3055 /* An error occurred. */
3061 /* Read all there was. */
3071 /* If the buffer is filling up, expand it. */
3072 if (buf_alloc
< buf_pos
* 2)
3075 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3085 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3088 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3093 gdb::unique_xmalloc_ptr
<char>
3094 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3098 LONGEST i
, transferred
;
3100 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3101 bufstr
= (char *) buffer
;
3103 if (transferred
< 0)
3104 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3106 if (transferred
== 0)
3107 return make_unique_xstrdup ("");
3109 bufstr
[transferred
] = 0;
3111 /* Check for embedded NUL bytes; but allow trailing NULs. */
3112 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3115 warning (_("target file %s "
3116 "contained unexpected null characters"),
3121 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3126 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3127 CORE_ADDR addr
, int len
)
3129 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3133 default_watchpoint_addr_within_range (struct target_ops
*target
,
3135 CORE_ADDR start
, int length
)
3137 return addr
>= start
&& addr
< start
+ length
;
3143 target_stack::find_beneath (const target_ops
*t
) const
3145 /* Look for a non-empty slot at stratum levels beneath T's. */
3146 for (int stratum
= t
->stratum () - 1; stratum
>= 0; --stratum
)
3147 if (m_stack
[stratum
] != NULL
)
3148 return m_stack
[stratum
];
3156 find_target_at (enum strata stratum
)
3158 return g_target_stack
.at (stratum
);
3166 target_announce_detach (int from_tty
)
3169 const char *exec_file
;
3174 exec_file
= get_exec_file (0);
3175 if (exec_file
== NULL
)
3178 pid
= inferior_ptid
.pid ();
3179 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3180 target_pid_to_str (ptid_t (pid
)).c_str ());
3183 /* The inferior process has died. Long live the inferior! */
3186 generic_mourn_inferior (void)
3188 inferior
*inf
= current_inferior ();
3190 inferior_ptid
= null_ptid
;
3192 /* Mark breakpoints uninserted in case something tries to delete a
3193 breakpoint while we delete the inferior's threads (which would
3194 fail, since the inferior is long gone). */
3195 mark_breakpoints_out ();
3198 exit_inferior (inf
);
3200 /* Note this wipes step-resume breakpoints, so needs to be done
3201 after exit_inferior, which ends up referencing the step-resume
3202 breakpoints through clear_thread_inferior_resources. */
3203 breakpoint_init_inferior (inf_exited
);
3205 registers_changed ();
3207 reopen_exec_file ();
3208 reinit_frame_cache ();
3210 if (deprecated_detach_hook
)
3211 deprecated_detach_hook ();
3214 /* Convert a normal process ID to a string. Returns the string in a
3218 normal_pid_to_str (ptid_t ptid
)
3220 return string_printf ("process %d", ptid
.pid ());
3224 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3226 return normal_pid_to_str (ptid
);
3229 /* Error-catcher for target_find_memory_regions. */
3231 dummy_find_memory_regions (struct target_ops
*self
,
3232 find_memory_region_ftype ignore1
, void *ignore2
)
3234 error (_("Command not implemented for this target."));
3238 /* Error-catcher for target_make_corefile_notes. */
3240 dummy_make_corefile_notes (struct target_ops
*self
,
3241 bfd
*ignore1
, int *ignore2
)
3243 error (_("Command not implemented for this target."));
3247 #include "target-delegates.c"
3249 /* The initial current target, so that there is always a semi-valid
3252 static dummy_target the_dummy_target
;
3254 static const target_info dummy_target_info
= {
3261 dummy_target::stratum () const
3263 return dummy_stratum
;
3267 debug_target::stratum () const
3269 return debug_stratum
;
3273 dummy_target::info () const
3275 return dummy_target_info
;
3279 debug_target::info () const
3281 return beneath ()->info ();
3287 target_close (struct target_ops
*targ
)
3289 gdb_assert (!target_is_pushed (targ
));
3291 fileio_handles_invalidate_target (targ
);
3296 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3300 target_thread_alive (ptid_t ptid
)
3302 return current_top_target ()->thread_alive (ptid
);
3306 target_update_thread_list (void)
3308 current_top_target ()->update_thread_list ();
3312 target_stop (ptid_t ptid
)
3316 warning (_("May not interrupt or stop the target, ignoring attempt"));
3320 current_top_target ()->stop (ptid
);
3328 warning (_("May not interrupt or stop the target, ignoring attempt"));
3332 current_top_target ()->interrupt ();
3338 target_pass_ctrlc (void)
3340 current_top_target ()->pass_ctrlc ();
3346 default_target_pass_ctrlc (struct target_ops
*ops
)
3348 target_interrupt ();
3351 /* See target/target.h. */
3354 target_stop_and_wait (ptid_t ptid
)
3356 struct target_waitstatus status
;
3357 bool was_non_stop
= non_stop
;
3362 memset (&status
, 0, sizeof (status
));
3363 target_wait (ptid
, &status
, 0);
3365 non_stop
= was_non_stop
;
3368 /* See target/target.h. */
3371 target_continue_no_signal (ptid_t ptid
)
3373 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3376 /* See target/target.h. */
3379 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3381 target_resume (ptid
, 0, signal
);
3384 /* Concatenate ELEM to LIST, a comma-separated list. */
3387 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3389 if (!list
->empty ())
3390 list
->append (", ");
3392 list
->append (elem
);
3395 /* Helper for target_options_to_string. If OPT is present in
3396 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3397 OPT is removed from TARGET_OPTIONS. */
3400 do_option (int *target_options
, std::string
*ret
,
3401 int opt
, const char *opt_str
)
3403 if ((*target_options
& opt
) != 0)
3405 str_comma_list_concat_elem (ret
, opt_str
);
3406 *target_options
&= ~opt
;
3413 target_options_to_string (int target_options
)
3417 #define DO_TARG_OPTION(OPT) \
3418 do_option (&target_options, &ret, OPT, #OPT)
3420 DO_TARG_OPTION (TARGET_WNOHANG
);
3422 if (target_options
!= 0)
3423 str_comma_list_concat_elem (&ret
, "unknown???");
3429 target_fetch_registers (struct regcache
*regcache
, int regno
)
3431 current_top_target ()->fetch_registers (regcache
, regno
);
3433 regcache
->debug_print_register ("target_fetch_registers", regno
);
3437 target_store_registers (struct regcache
*regcache
, int regno
)
3439 if (!may_write_registers
)
3440 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3442 current_top_target ()->store_registers (regcache
, regno
);
3445 regcache
->debug_print_register ("target_store_registers", regno
);
3450 target_core_of_thread (ptid_t ptid
)
3452 return current_top_target ()->core_of_thread (ptid
);
3456 simple_verify_memory (struct target_ops
*ops
,
3457 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3459 LONGEST total_xfered
= 0;
3461 while (total_xfered
< size
)
3463 ULONGEST xfered_len
;
3464 enum target_xfer_status status
;
3466 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3468 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3469 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3471 if (status
== TARGET_XFER_OK
3472 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3474 total_xfered
+= xfered_len
;
3483 /* Default implementation of memory verification. */
3486 default_verify_memory (struct target_ops
*self
,
3487 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3489 /* Start over from the top of the target stack. */
3490 return simple_verify_memory (current_top_target (),
3491 data
, memaddr
, size
);
3495 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3497 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3500 /* The documentation for this function is in its prototype declaration in
3504 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3505 enum target_hw_bp_type rw
)
3507 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3510 /* The documentation for this function is in its prototype declaration in
3514 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3515 enum target_hw_bp_type rw
)
3517 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3520 /* The documentation for this function is in its prototype declaration
3524 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3526 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3529 /* The documentation for this function is in its prototype declaration
3533 target_ranged_break_num_registers (void)
3535 return current_top_target ()->ranged_break_num_registers ();
3540 struct btrace_target_info
*
3541 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3543 return current_top_target ()->enable_btrace (ptid
, conf
);
3549 target_disable_btrace (struct btrace_target_info
*btinfo
)
3551 current_top_target ()->disable_btrace (btinfo
);
3557 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3559 current_top_target ()->teardown_btrace (btinfo
);
3565 target_read_btrace (struct btrace_data
*btrace
,
3566 struct btrace_target_info
*btinfo
,
3567 enum btrace_read_type type
)
3569 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3574 const struct btrace_config
*
3575 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3577 return current_top_target ()->btrace_conf (btinfo
);
3583 target_stop_recording (void)
3585 current_top_target ()->stop_recording ();
3591 target_save_record (const char *filename
)
3593 current_top_target ()->save_record (filename
);
3599 target_supports_delete_record ()
3601 return current_top_target ()->supports_delete_record ();
3607 target_delete_record (void)
3609 current_top_target ()->delete_record ();
3615 target_record_method (ptid_t ptid
)
3617 return current_top_target ()->record_method (ptid
);
3623 target_record_is_replaying (ptid_t ptid
)
3625 return current_top_target ()->record_is_replaying (ptid
);
3631 target_record_will_replay (ptid_t ptid
, int dir
)
3633 return current_top_target ()->record_will_replay (ptid
, dir
);
3639 target_record_stop_replaying (void)
3641 current_top_target ()->record_stop_replaying ();
3647 target_goto_record_begin (void)
3649 current_top_target ()->goto_record_begin ();
3655 target_goto_record_end (void)
3657 current_top_target ()->goto_record_end ();
3663 target_goto_record (ULONGEST insn
)
3665 current_top_target ()->goto_record (insn
);
3671 target_insn_history (int size
, gdb_disassembly_flags flags
)
3673 current_top_target ()->insn_history (size
, flags
);
3679 target_insn_history_from (ULONGEST from
, int size
,
3680 gdb_disassembly_flags flags
)
3682 current_top_target ()->insn_history_from (from
, size
, flags
);
3688 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3689 gdb_disassembly_flags flags
)
3691 current_top_target ()->insn_history_range (begin
, end
, flags
);
3697 target_call_history (int size
, record_print_flags flags
)
3699 current_top_target ()->call_history (size
, flags
);
3705 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3707 current_top_target ()->call_history_from (begin
, size
, flags
);
3713 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3715 current_top_target ()->call_history_range (begin
, end
, flags
);
3720 const struct frame_unwind
*
3721 target_get_unwinder (void)
3723 return current_top_target ()->get_unwinder ();
3728 const struct frame_unwind
*
3729 target_get_tailcall_unwinder (void)
3731 return current_top_target ()->get_tailcall_unwinder ();
3737 target_prepare_to_generate_core (void)
3739 current_top_target ()->prepare_to_generate_core ();
3745 target_done_generating_core (void)
3747 current_top_target ()->done_generating_core ();
3752 static char targ_desc
[] =
3753 "Names of targets and files being debugged.\nShows the entire \
3754 stack of targets currently in use (including the exec-file,\n\
3755 core-file, and process, if any), as well as the symbol file name.";
3758 default_rcmd (struct target_ops
*self
, const char *command
,
3759 struct ui_file
*output
)
3761 error (_("\"monitor\" command not supported by this target."));
3765 do_monitor_command (const char *cmd
, int from_tty
)
3767 target_rcmd (cmd
, gdb_stdtarg
);
3770 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3774 flash_erase_command (const char *cmd
, int from_tty
)
3776 /* Used to communicate termination of flash operations to the target. */
3777 bool found_flash_region
= false;
3778 struct gdbarch
*gdbarch
= target_gdbarch ();
3780 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3782 /* Iterate over all memory regions. */
3783 for (const mem_region
&m
: mem_regions
)
3785 /* Is this a flash memory region? */
3786 if (m
.attrib
.mode
== MEM_FLASH
)
3788 found_flash_region
= true;
3789 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3791 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3793 current_uiout
->message (_("Erasing flash memory region at address "));
3794 current_uiout
->field_core_addr ("address", gdbarch
, m
.lo
);
3795 current_uiout
->message (", size = ");
3796 current_uiout
->field_string ("size", hex_string (m
.hi
- m
.lo
));
3797 current_uiout
->message ("\n");
3801 /* Did we do any flash operations? If so, we need to finalize them. */
3802 if (found_flash_region
)
3803 target_flash_done ();
3805 current_uiout
->message (_("No flash memory regions found.\n"));
3808 /* Print the name of each layers of our target stack. */
3811 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3813 printf_filtered (_("The current target stack is:\n"));
3815 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3817 if (t
->stratum () == debug_stratum
)
3819 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3826 target_async (int enable
)
3828 infrun_async (enable
);
3829 current_top_target ()->async (enable
);
3835 target_thread_events (int enable
)
3837 current_top_target ()->thread_events (enable
);
3840 /* Controls if targets can report that they can/are async. This is
3841 just for maintainers to use when debugging gdb. */
3842 bool target_async_permitted
= true;
3844 /* The set command writes to this variable. If the inferior is
3845 executing, target_async_permitted is *not* updated. */
3846 static bool target_async_permitted_1
= true;
3849 maint_set_target_async_command (const char *args
, int from_tty
,
3850 struct cmd_list_element
*c
)
3852 if (have_live_inferiors ())
3854 target_async_permitted_1
= target_async_permitted
;
3855 error (_("Cannot change this setting while the inferior is running."));
3858 target_async_permitted
= target_async_permitted_1
;
3862 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3863 struct cmd_list_element
*c
,
3866 fprintf_filtered (file
,
3867 _("Controlling the inferior in "
3868 "asynchronous mode is %s.\n"), value
);
3871 /* Return true if the target operates in non-stop mode even with "set
3875 target_always_non_stop_p (void)
3877 return current_top_target ()->always_non_stop_p ();
3883 target_is_non_stop_p (void)
3886 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3887 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3888 && target_always_non_stop_p ()));
3891 /* Controls if targets can report that they always run in non-stop
3892 mode. This is just for maintainers to use when debugging gdb. */
3893 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3895 /* The set command writes to this variable. If the inferior is
3896 executing, target_non_stop_enabled is *not* updated. */
3897 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3899 /* Implementation of "maint set target-non-stop". */
3902 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3903 struct cmd_list_element
*c
)
3905 if (have_live_inferiors ())
3907 target_non_stop_enabled_1
= target_non_stop_enabled
;
3908 error (_("Cannot change this setting while the inferior is running."));
3911 target_non_stop_enabled
= target_non_stop_enabled_1
;
3914 /* Implementation of "maint show target-non-stop". */
3917 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3918 struct cmd_list_element
*c
,
3921 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3922 fprintf_filtered (file
,
3923 _("Whether the target is always in non-stop mode "
3924 "is %s (currently %s).\n"), value
,
3925 target_always_non_stop_p () ? "on" : "off");
3927 fprintf_filtered (file
,
3928 _("Whether the target is always in non-stop mode "
3929 "is %s.\n"), value
);
3932 /* Temporary copies of permission settings. */
3934 static bool may_write_registers_1
= true;
3935 static bool may_write_memory_1
= true;
3936 static bool may_insert_breakpoints_1
= true;
3937 static bool may_insert_tracepoints_1
= true;
3938 static bool may_insert_fast_tracepoints_1
= true;
3939 static bool may_stop_1
= true;
3941 /* Make the user-set values match the real values again. */
3944 update_target_permissions (void)
3946 may_write_registers_1
= may_write_registers
;
3947 may_write_memory_1
= may_write_memory
;
3948 may_insert_breakpoints_1
= may_insert_breakpoints
;
3949 may_insert_tracepoints_1
= may_insert_tracepoints
;
3950 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
3951 may_stop_1
= may_stop
;
3954 /* The one function handles (most of) the permission flags in the same
3958 set_target_permissions (const char *args
, int from_tty
,
3959 struct cmd_list_element
*c
)
3961 if (target_has_execution
)
3963 update_target_permissions ();
3964 error (_("Cannot change this setting while the inferior is running."));
3967 /* Make the real values match the user-changed values. */
3968 may_write_registers
= may_write_registers_1
;
3969 may_insert_breakpoints
= may_insert_breakpoints_1
;
3970 may_insert_tracepoints
= may_insert_tracepoints_1
;
3971 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
3972 may_stop
= may_stop_1
;
3973 update_observer_mode ();
3976 /* Set memory write permission independently of observer mode. */
3979 set_write_memory_permission (const char *args
, int from_tty
,
3980 struct cmd_list_element
*c
)
3982 /* Make the real values match the user-changed values. */
3983 may_write_memory
= may_write_memory_1
;
3984 update_observer_mode ();
3988 initialize_targets (void)
3990 push_target (&the_dummy_target
);
3992 the_debug_target
= new debug_target ();
3994 add_info ("target", info_target_command
, targ_desc
);
3995 add_info ("files", info_target_command
, targ_desc
);
3997 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
3998 Set target debugging."), _("\
3999 Show target debugging."), _("\
4000 When non-zero, target debugging is enabled. Higher numbers are more\n\
4004 &setdebuglist
, &showdebuglist
);
4006 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4007 &trust_readonly
, _("\
4008 Set mode for reading from readonly sections."), _("\
4009 Show mode for reading from readonly sections."), _("\
4010 When this mode is on, memory reads from readonly sections (such as .text)\n\
4011 will be read from the object file instead of from the target. This will\n\
4012 result in significant performance improvement for remote targets."),
4014 show_trust_readonly
,
4015 &setlist
, &showlist
);
4017 add_com ("monitor", class_obscure
, do_monitor_command
,
4018 _("Send a command to the remote monitor (remote targets only)."));
4020 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4021 _("Print the name of each layer of the internal target stack."),
4022 &maintenanceprintlist
);
4024 add_setshow_boolean_cmd ("target-async", no_class
,
4025 &target_async_permitted_1
, _("\
4026 Set whether gdb controls the inferior in asynchronous mode."), _("\
4027 Show whether gdb controls the inferior in asynchronous mode."), _("\
4028 Tells gdb whether to control the inferior in asynchronous mode."),
4029 maint_set_target_async_command
,
4030 maint_show_target_async_command
,
4031 &maintenance_set_cmdlist
,
4032 &maintenance_show_cmdlist
);
4034 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4035 &target_non_stop_enabled_1
, _("\
4036 Set whether gdb always controls the inferior in non-stop mode."), _("\
4037 Show whether gdb always controls the inferior in non-stop mode."), _("\
4038 Tells gdb whether to control the inferior in non-stop mode."),
4039 maint_set_target_non_stop_command
,
4040 maint_show_target_non_stop_command
,
4041 &maintenance_set_cmdlist
,
4042 &maintenance_show_cmdlist
);
4044 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4045 &may_write_registers_1
, _("\
4046 Set permission to write into registers."), _("\
4047 Show permission to write into registers."), _("\
4048 When this permission is on, GDB may write into the target's registers.\n\
4049 Otherwise, any sort of write attempt will result in an error."),
4050 set_target_permissions
, NULL
,
4051 &setlist
, &showlist
);
4053 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4054 &may_write_memory_1
, _("\
4055 Set permission to write into target memory."), _("\
4056 Show permission to write into target memory."), _("\
4057 When this permission is on, GDB may write into the target's memory.\n\
4058 Otherwise, any sort of write attempt will result in an error."),
4059 set_write_memory_permission
, NULL
,
4060 &setlist
, &showlist
);
4062 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4063 &may_insert_breakpoints_1
, _("\
4064 Set permission to insert breakpoints in the target."), _("\
4065 Show permission to insert breakpoints in the target."), _("\
4066 When this permission is on, GDB may insert breakpoints in the program.\n\
4067 Otherwise, any sort of insertion attempt will result in an error."),
4068 set_target_permissions
, NULL
,
4069 &setlist
, &showlist
);
4071 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4072 &may_insert_tracepoints_1
, _("\
4073 Set permission to insert tracepoints in the target."), _("\
4074 Show permission to insert tracepoints in the target."), _("\
4075 When this permission is on, GDB may insert tracepoints in the program.\n\
4076 Otherwise, any sort of insertion attempt will result in an error."),
4077 set_target_permissions
, NULL
,
4078 &setlist
, &showlist
);
4080 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4081 &may_insert_fast_tracepoints_1
, _("\
4082 Set permission to insert fast tracepoints in the target."), _("\
4083 Show permission to insert fast tracepoints in the target."), _("\
4084 When this permission is on, GDB may insert fast tracepoints.\n\
4085 Otherwise, any sort of insertion attempt will result in an error."),
4086 set_target_permissions
, NULL
,
4087 &setlist
, &showlist
);
4089 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4091 Set permission to interrupt or signal the target."), _("\
4092 Show permission to interrupt or signal the target."), _("\
4093 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4094 Otherwise, any attempt to interrupt or stop will be ignored."),
4095 set_target_permissions
, NULL
,
4096 &setlist
, &showlist
);
4098 add_com ("flash-erase", no_class
, flash_erase_command
,
4099 _("Erase all flash memory regions."));
4101 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4102 &auto_connect_native_target
, _("\
4103 Set whether GDB may automatically connect to the native target."), _("\
4104 Show whether GDB may automatically connect to the native target."), _("\
4105 When on, and GDB is not connected to a target yet, GDB\n\
4106 attempts \"run\" and other commands with the native target."),
4107 NULL
, show_auto_connect_native_target
,
4108 &setlist
, &showlist
);