1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2018 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"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "byte-vector.h"
52 #include <unordered_map>
54 static void generic_tls_error (void) ATTRIBUTE_NORETURN
;
56 static void default_terminal_info (struct target_ops
*, const char *, int);
58 static int default_watchpoint_addr_within_range (struct target_ops
*,
59 CORE_ADDR
, CORE_ADDR
, int);
61 static int default_region_ok_for_hw_watchpoint (struct target_ops
*,
64 static void default_rcmd (struct target_ops
*, const char *, struct ui_file
*);
66 static ptid_t
default_get_ada_task_ptid (struct target_ops
*self
,
69 static int default_follow_fork (struct target_ops
*self
, int follow_child
,
72 static void default_mourn_inferior (struct target_ops
*self
);
74 static int default_search_memory (struct target_ops
*ops
,
76 ULONGEST search_space_len
,
77 const gdb_byte
*pattern
,
79 CORE_ADDR
*found_addrp
);
81 static int default_verify_memory (struct target_ops
*self
,
83 CORE_ADDR memaddr
, ULONGEST size
);
85 static struct address_space
*default_thread_address_space
86 (struct target_ops
*self
, ptid_t ptid
);
88 static void tcomplain (void) ATTRIBUTE_NORETURN
;
90 static struct target_ops
*find_default_run_target (const char *);
92 static struct gdbarch
*default_thread_architecture (struct target_ops
*ops
,
95 static int dummy_find_memory_regions (struct target_ops
*self
,
96 find_memory_region_ftype ignore1
,
99 static char *dummy_make_corefile_notes (struct target_ops
*self
,
100 bfd
*ignore1
, int *ignore2
);
102 static const char *default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
);
104 static enum exec_direction_kind default_execution_direction
105 (struct target_ops
*self
);
107 /* Mapping between target_info objects (which have address identity)
108 and corresponding open/factory function/callback. Each add_target
109 call adds one entry to this map, and registers a "target
110 TARGET_NAME" command that when invoked calls the factory registered
111 here. The target_info object is associated with the command via
112 the command's context. */
113 static std::unordered_map
<const target_info
*, target_open_ftype
*>
116 /* The initial current target, so that there is always a semi-valid
119 static struct target_ops
*the_dummy_target
;
120 static struct target_ops
*the_debug_target
;
122 /* Top of target stack. */
123 /* The target structure we are currently using to talk to a process
124 or file or whatever "inferior" we have. */
126 static target_ops
*g_current_top_target
;
129 current_top_target ()
131 return g_current_top_target
;
134 /* Command list for target. */
136 static struct cmd_list_element
*targetlist
= NULL
;
138 /* Nonzero if we should trust readonly sections from the
139 executable when reading memory. */
141 static int trust_readonly
= 0;
143 /* Nonzero if we should show true memory content including
144 memory breakpoint inserted by gdb. */
146 static int show_memory_breakpoints
= 0;
148 /* These globals control whether GDB attempts to perform these
149 operations; they are useful for targets that need to prevent
150 inadvertant disruption, such as in non-stop mode. */
152 int may_write_registers
= 1;
154 int may_write_memory
= 1;
156 int may_insert_breakpoints
= 1;
158 int may_insert_tracepoints
= 1;
160 int may_insert_fast_tracepoints
= 1;
164 /* Non-zero if we want to see trace of target level stuff. */
166 static unsigned int targetdebug
= 0;
169 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
172 push_target (the_debug_target
);
174 unpush_target (the_debug_target
);
178 show_targetdebug (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
184 /* The user just typed 'target' without the name of a target. */
187 target_command (const char *arg
, int from_tty
)
189 fputs_filtered ("Argument required (target name). Try `help target'\n",
194 namespace selftests
{
196 /* A mock process_stratum target_ops that doesn't read/write registers
199 static const target_info test_target_info
= {
201 N_("unit tests target"),
202 N_("You should never see this"),
206 test_target_ops::info () const
208 return test_target_info
;
211 } /* namespace selftests */
212 #endif /* GDB_SELF_TEST */
214 /* Default target_has_* methods for process_stratum targets. */
217 default_child_has_all_memory ()
219 /* If no inferior selected, then we can't read memory here. */
220 if (ptid_equal (inferior_ptid
, null_ptid
))
227 default_child_has_memory ()
229 /* If no inferior selected, then we can't read memory here. */
230 if (ptid_equal (inferior_ptid
, null_ptid
))
237 default_child_has_stack ()
239 /* If no inferior selected, there's no stack. */
240 if (ptid_equal (inferior_ptid
, null_ptid
))
247 default_child_has_registers ()
249 /* Can't read registers from no inferior. */
250 if (ptid_equal (inferior_ptid
, null_ptid
))
257 default_child_has_execution (ptid_t the_ptid
)
259 /* If there's no thread selected, then we can't make it run through
261 if (ptid_equal (the_ptid
, null_ptid
))
269 target_has_all_memory_1 (void)
271 struct target_ops
*t
;
273 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
274 if (t
->has_all_memory ())
281 target_has_memory_1 (void)
283 struct target_ops
*t
;
285 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
286 if (t
->has_memory ())
293 target_has_stack_1 (void)
295 struct target_ops
*t
;
297 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
305 target_has_registers_1 (void)
307 struct target_ops
*t
;
309 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
310 if (t
->has_registers ())
317 target_has_execution_1 (ptid_t the_ptid
)
319 struct target_ops
*t
;
321 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
322 if (t
->has_execution (the_ptid
))
329 target_has_execution_current (void)
331 return target_has_execution_1 (inferior_ptid
);
334 /* This is used to implement the various target commands. */
337 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
339 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
340 target_open_ftype
*func
= target_factories
[ti
];
343 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
346 func (args
, from_tty
);
349 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
350 ti
->shortname
, args
, from_tty
);
356 add_target (const target_info
&t
, target_open_ftype
*func
,
357 completer_ftype
*completer
)
359 struct cmd_list_element
*c
;
361 auto &func_slot
= target_factories
[&t
];
362 if (func_slot
!= nullptr)
363 internal_error (__FILE__
, __LINE__
,
364 _("target already added (\"%s\")."), t
.shortname
);
367 if (targetlist
== NULL
)
368 add_prefix_cmd ("target", class_run
, target_command
, _("\
369 Connect to a target machine or process.\n\
370 The first argument is the type or protocol of the target machine.\n\
371 Remaining arguments are interpreted by the target protocol. For more\n\
372 information on the arguments for a particular protocol, type\n\
373 `help target ' followed by the protocol name."),
374 &targetlist
, "target ", 0, &cmdlist
);
375 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
376 set_cmd_context (c
, (void *) &t
);
377 set_cmd_sfunc (c
, open_target
);
378 if (completer
!= NULL
)
379 set_cmd_completer (c
, completer
);
385 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
387 struct cmd_list_element
*c
;
390 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
392 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
393 set_cmd_sfunc (c
, open_target
);
394 set_cmd_context (c
, (void *) &tinfo
);
395 alt
= xstrprintf ("target %s", tinfo
.shortname
);
396 deprecate_cmd (c
, alt
);
404 current_top_target ()->kill ();
408 target_load (const char *arg
, int from_tty
)
410 target_dcache_invalidate ();
411 current_top_target ()->load (arg
, from_tty
);
416 target_terminal_state
target_terminal::m_terminal_state
417 = target_terminal_state::is_ours
;
419 /* See target/target.h. */
422 target_terminal::init (void)
424 current_top_target ()->terminal_init ();
426 m_terminal_state
= target_terminal_state::is_ours
;
429 /* See target/target.h. */
432 target_terminal::inferior (void)
434 struct ui
*ui
= current_ui
;
436 /* A background resume (``run&'') should leave GDB in control of the
438 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
441 /* Since we always run the inferior in the main console (unless "set
442 inferior-tty" is in effect), when some UI other than the main one
443 calls target_terminal::inferior, then we leave the main UI's
444 terminal settings as is. */
448 /* If GDB is resuming the inferior in the foreground, install
449 inferior's terminal modes. */
451 struct inferior
*inf
= current_inferior ();
453 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
455 current_top_target ()->terminal_inferior ();
456 inf
->terminal_state
= target_terminal_state::is_inferior
;
459 m_terminal_state
= target_terminal_state::is_inferior
;
461 /* If the user hit C-c before, pretend that it was hit right
463 if (check_quit_flag ())
464 target_pass_ctrlc ();
467 /* See target/target.h. */
470 target_terminal::restore_inferior (void)
472 struct ui
*ui
= current_ui
;
474 /* See target_terminal::inferior(). */
475 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
478 /* Restore the terminal settings of inferiors that were in the
479 foreground but are now ours_for_output due to a temporary
480 target_target::ours_for_output() call. */
483 scoped_restore_current_inferior restore_inferior
;
484 struct inferior
*inf
;
488 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
490 set_current_inferior (inf
);
491 current_top_target ()->terminal_inferior ();
492 inf
->terminal_state
= target_terminal_state::is_inferior
;
497 m_terminal_state
= target_terminal_state::is_inferior
;
499 /* If the user hit C-c before, pretend that it was hit right
501 if (check_quit_flag ())
502 target_pass_ctrlc ();
505 /* Switch terminal state to DESIRED_STATE, either is_ours, or
506 is_ours_for_output. */
509 target_terminal_is_ours_kind (target_terminal_state desired_state
)
511 scoped_restore_current_inferior restore_inferior
;
512 struct inferior
*inf
;
514 /* Must do this in two passes. First, have all inferiors save the
515 current terminal settings. Then, after all inferiors have add a
516 chance to safely save the terminal settings, restore GDB's
517 terminal settings. */
521 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
523 set_current_inferior (inf
);
524 current_top_target ()->terminal_save_inferior ();
530 /* Note we don't check is_inferior here like above because we
531 need to handle 'is_ours_for_output -> is_ours' too. Careful
532 to never transition from 'is_ours' to 'is_ours_for_output',
534 if (inf
->terminal_state
!= target_terminal_state::is_ours
535 && inf
->terminal_state
!= desired_state
)
537 set_current_inferior (inf
);
538 if (desired_state
== target_terminal_state::is_ours
)
539 current_top_target ()->terminal_ours ();
540 else if (desired_state
== target_terminal_state::is_ours_for_output
)
541 current_top_target ()->terminal_ours_for_output ();
543 gdb_assert_not_reached ("unhandled desired state");
544 inf
->terminal_state
= desired_state
;
549 /* See target/target.h. */
552 target_terminal::ours ()
554 struct ui
*ui
= current_ui
;
556 /* See target_terminal::inferior. */
560 if (m_terminal_state
== target_terminal_state::is_ours
)
563 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
564 m_terminal_state
= target_terminal_state::is_ours
;
567 /* See target/target.h. */
570 target_terminal::ours_for_output ()
572 struct ui
*ui
= current_ui
;
574 /* See target_terminal::inferior. */
578 if (!target_terminal::is_inferior ())
581 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
582 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
585 /* See target/target.h. */
588 target_terminal::info (const char *arg
, int from_tty
)
590 current_top_target ()->terminal_info (arg
, from_tty
);
596 target_supports_terminal_ours (void)
598 return current_top_target ()->supports_terminal_ours ();
604 error (_("You can't do that when your target is `%s'"),
605 current_top_target ()->shortname ());
611 error (_("You can't do that without a process to debug."));
615 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
617 printf_unfiltered (_("No saved terminal information.\n"));
620 /* A default implementation for the to_get_ada_task_ptid target method.
622 This function builds the PTID by using both LWP and TID as part of
623 the PTID lwp and tid elements. The pid used is the pid of the
627 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
629 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, tid
);
632 static enum exec_direction_kind
633 default_execution_direction (struct target_ops
*self
)
635 if (!target_can_execute_reverse
)
637 else if (!target_can_async_p ())
640 gdb_assert_not_reached ("\
641 to_execution_direction must be implemented for reverse async");
644 /* Push a new target type into the stack of the existing target accessors,
645 possibly superseding some of the existing accessors.
647 Rather than allow an empty stack, we always have the dummy target at
648 the bottom stratum, so we can call the function vectors without
652 push_target (struct target_ops
*t
)
654 struct target_ops
**cur
;
656 /* Find the proper stratum to install this target in. */
657 for (cur
= &g_current_top_target
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
659 if ((int) (t
->to_stratum
) >= (int) (*cur
)->to_stratum
)
663 /* If there's already targets at this stratum, remove them. */
664 /* FIXME: cagney/2003-10-15: I think this should be popping all
665 targets to CUR, and not just those at this stratum level. */
666 while ((*cur
) != NULL
&& t
->to_stratum
== (*cur
)->to_stratum
)
668 /* There's already something at this stratum level. Close it,
669 and un-hook it from the stack. */
670 struct target_ops
*tmp
= (*cur
);
672 (*cur
) = (*cur
)->beneath
;
677 /* We have removed all targets in our stratum, now add the new one. */
682 /* Remove a target_ops vector from the stack, wherever it may be.
683 Return how many times it was removed (0 or 1). */
686 unpush_target (struct target_ops
*t
)
688 struct target_ops
**cur
;
689 struct target_ops
*tmp
;
691 if (t
->to_stratum
== dummy_stratum
)
692 internal_error (__FILE__
, __LINE__
,
693 _("Attempt to unpush the dummy target"));
695 /* Look for the specified target. Note that we assume that a target
696 can only occur once in the target stack. */
698 for (cur
= &g_current_top_target
; (*cur
) != NULL
; cur
= &(*cur
)->beneath
)
704 /* If we don't find target_ops, quit. Only open targets should be
709 /* Unchain the target. */
711 (*cur
) = (*cur
)->beneath
;
714 /* Finally close the target. Note we do this after unchaining, so
715 any target method calls from within the target_close
716 implementation don't end up in T anymore. */
722 /* Unpush TARGET and assert that it worked. */
725 unpush_target_and_assert (struct target_ops
*target
)
727 if (!unpush_target (target
))
729 fprintf_unfiltered (gdb_stderr
,
730 "pop_all_targets couldn't find target %s\n",
731 target
->shortname ());
732 internal_error (__FILE__
, __LINE__
,
733 _("failed internal consistency check"));
738 pop_all_targets_above (enum strata above_stratum
)
740 while ((int) (current_top_target ()->to_stratum
) > (int) above_stratum
)
741 unpush_target_and_assert (current_top_target ());
747 pop_all_targets_at_and_above (enum strata stratum
)
749 while ((int) (current_top_target ()->to_stratum
) >= (int) stratum
)
750 unpush_target_and_assert (current_top_target ());
754 pop_all_targets (void)
756 pop_all_targets_above (dummy_stratum
);
759 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
762 target_is_pushed (struct target_ops
*t
)
764 struct target_ops
*cur
;
766 for (cur
= current_top_target (); cur
!= NULL
; cur
= cur
->beneath
)
773 /* Default implementation of to_get_thread_local_address. */
776 generic_tls_error (void)
778 throw_error (TLS_GENERIC_ERROR
,
779 _("Cannot find thread-local variables on this target"));
782 /* Using the objfile specified in OBJFILE, find the address for the
783 current thread's thread-local storage with offset OFFSET. */
785 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
787 volatile CORE_ADDR addr
= 0;
788 struct target_ops
*target
= current_top_target ();
790 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
792 ptid_t ptid
= inferior_ptid
;
798 /* Fetch the load module address for this objfile. */
799 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
802 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
804 /* If an error occurred, print TLS related messages here. Otherwise,
805 throw the error to some higher catcher. */
806 CATCH (ex
, RETURN_MASK_ALL
)
808 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
812 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
813 error (_("Cannot find thread-local variables "
814 "in this thread library."));
816 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
817 if (objfile_is_library
)
818 error (_("Cannot find shared library `%s' in dynamic"
819 " linker's load module list"), objfile_name (objfile
));
821 error (_("Cannot find executable file `%s' in dynamic"
822 " linker's load module list"), objfile_name (objfile
));
824 case TLS_NOT_ALLOCATED_YET_ERROR
:
825 if (objfile_is_library
)
826 error (_("The inferior has not yet allocated storage for"
827 " thread-local variables in\n"
828 "the shared library `%s'\n"
830 objfile_name (objfile
), target_pid_to_str (ptid
));
832 error (_("The inferior has not yet allocated storage for"
833 " thread-local variables in\n"
834 "the executable `%s'\n"
836 objfile_name (objfile
), target_pid_to_str (ptid
));
838 case TLS_GENERIC_ERROR
:
839 if (objfile_is_library
)
840 error (_("Cannot find thread-local storage for %s, "
841 "shared library %s:\n%s"),
842 target_pid_to_str (ptid
),
843 objfile_name (objfile
), ex
.message
);
845 error (_("Cannot find thread-local storage for %s, "
846 "executable file %s:\n%s"),
847 target_pid_to_str (ptid
),
848 objfile_name (objfile
), ex
.message
);
851 throw_exception (ex
);
857 /* It wouldn't be wrong here to try a gdbarch method, too; finding
858 TLS is an ABI-specific thing. But we don't do that yet. */
860 error (_("Cannot find thread-local variables on this target"));
866 target_xfer_status_to_string (enum target_xfer_status status
)
868 #define CASE(X) case X: return #X
871 CASE(TARGET_XFER_E_IO
);
872 CASE(TARGET_XFER_UNAVAILABLE
);
881 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
883 /* target_read_string -- read a null terminated string, up to LEN bytes,
884 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
885 Set *STRING to a pointer to malloc'd memory containing the data; the caller
886 is responsible for freeing it. Return the number of bytes successfully
890 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
891 int len
, int *errnop
)
897 int buffer_allocated
;
899 unsigned int nbytes_read
= 0;
903 /* Small for testing. */
904 buffer_allocated
= 4;
905 buffer
= (char *) xmalloc (buffer_allocated
);
910 tlen
= MIN (len
, 4 - (memaddr
& 3));
911 offset
= memaddr
& 3;
913 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
916 /* The transfer request might have crossed the boundary to an
917 unallocated region of memory. Retry the transfer, requesting
921 errcode
= target_read_memory (memaddr
, buf
, 1);
926 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
930 bytes
= bufptr
- buffer
;
931 buffer_allocated
*= 2;
932 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
933 bufptr
= buffer
+ bytes
;
936 for (i
= 0; i
< tlen
; i
++)
938 *bufptr
++ = buf
[i
+ offset
];
939 if (buf
[i
+ offset
] == '\000')
941 nbytes_read
+= i
+ 1;
951 string
->reset (buffer
);
957 struct target_section_table
*
958 target_get_section_table (struct target_ops
*target
)
960 return target
->get_section_table ();
963 /* Find a section containing ADDR. */
965 struct target_section
*
966 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
968 struct target_section_table
*table
= target_get_section_table (target
);
969 struct target_section
*secp
;
974 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
976 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
983 /* Helper for the memory xfer routines. Checks the attributes of the
984 memory region of MEMADDR against the read or write being attempted.
985 If the access is permitted returns true, otherwise returns false.
986 REGION_P is an optional output parameter. If not-NULL, it is
987 filled with a pointer to the memory region of MEMADDR. REG_LEN
988 returns LEN trimmed to the end of the region. This is how much the
989 caller can continue requesting, if the access is permitted. A
990 single xfer request must not straddle memory region boundaries. */
993 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
994 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
995 struct mem_region
**region_p
)
997 struct mem_region
*region
;
999 region
= lookup_mem_region (memaddr
);
1001 if (region_p
!= NULL
)
1004 switch (region
->attrib
.mode
)
1007 if (writebuf
!= NULL
)
1012 if (readbuf
!= NULL
)
1017 /* We only support writing to flash during "load" for now. */
1018 if (writebuf
!= NULL
)
1019 error (_("Writing to flash memory forbidden in this context"));
1026 /* region->hi == 0 means there's no upper bound. */
1027 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1030 *reg_len
= region
->hi
- memaddr
;
1035 /* Read memory from more than one valid target. A core file, for
1036 instance, could have some of memory but delegate other bits to
1037 the target below it. So, we must manually try all targets. */
1039 enum target_xfer_status
1040 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1041 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1042 ULONGEST
*xfered_len
)
1044 enum target_xfer_status res
;
1048 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1049 readbuf
, writebuf
, memaddr
, len
,
1051 if (res
== TARGET_XFER_OK
)
1054 /* Stop if the target reports that the memory is not available. */
1055 if (res
== TARGET_XFER_UNAVAILABLE
)
1058 /* We want to continue past core files to executables, but not
1059 past a running target's memory. */
1060 if (ops
->has_all_memory ())
1065 while (ops
!= NULL
);
1067 /* The cache works at the raw memory level. Make sure the cache
1068 gets updated with raw contents no matter what kind of memory
1069 object was originally being written. Note we do write-through
1070 first, so that if it fails, we don't write to the cache contents
1071 that never made it to the target. */
1072 if (writebuf
!= NULL
1073 && !ptid_equal (inferior_ptid
, null_ptid
)
1074 && target_dcache_init_p ()
1075 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1077 DCACHE
*dcache
= target_dcache_get ();
1079 /* Note that writing to an area of memory which wasn't present
1080 in the cache doesn't cause it to be loaded in. */
1081 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1087 /* Perform a partial memory transfer.
1088 For docs see target.h, to_xfer_partial. */
1090 static enum target_xfer_status
1091 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1092 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1093 ULONGEST len
, ULONGEST
*xfered_len
)
1095 enum target_xfer_status res
;
1097 struct mem_region
*region
;
1098 struct inferior
*inf
;
1100 /* For accesses to unmapped overlay sections, read directly from
1101 files. Must do this first, as MEMADDR may need adjustment. */
1102 if (readbuf
!= NULL
&& overlay_debugging
)
1104 struct obj_section
*section
= find_pc_overlay (memaddr
);
1106 if (pc_in_unmapped_range (memaddr
, section
))
1108 struct target_section_table
*table
1109 = target_get_section_table (ops
);
1110 const char *section_name
= section
->the_bfd_section
->name
;
1112 memaddr
= overlay_mapped_address (memaddr
, section
);
1113 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1114 memaddr
, len
, xfered_len
,
1116 table
->sections_end
,
1121 /* Try the executable files, if "trust-readonly-sections" is set. */
1122 if (readbuf
!= NULL
&& trust_readonly
)
1124 struct target_section
*secp
;
1125 struct target_section_table
*table
;
1127 secp
= target_section_by_addr (ops
, memaddr
);
1129 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1130 secp
->the_bfd_section
)
1133 table
= target_get_section_table (ops
);
1134 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1135 memaddr
, len
, xfered_len
,
1137 table
->sections_end
,
1142 /* Try GDB's internal data cache. */
1144 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1146 return TARGET_XFER_E_IO
;
1148 if (!ptid_equal (inferior_ptid
, null_ptid
))
1149 inf
= find_inferior_ptid (inferior_ptid
);
1155 /* The dcache reads whole cache lines; that doesn't play well
1156 with reading from a trace buffer, because reading outside of
1157 the collected memory range fails. */
1158 && get_traceframe_number () == -1
1159 && (region
->attrib
.cache
1160 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1161 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1163 DCACHE
*dcache
= target_dcache_get_or_init ();
1165 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1166 reg_len
, xfered_len
);
1169 /* If none of those methods found the memory we wanted, fall back
1170 to a target partial transfer. Normally a single call to
1171 to_xfer_partial is enough; if it doesn't recognize an object
1172 it will call the to_xfer_partial of the next target down.
1173 But for memory this won't do. Memory is the only target
1174 object which can be read from more than one valid target.
1175 A core file, for instance, could have some of memory but
1176 delegate other bits to the target below it. So, we must
1177 manually try all targets. */
1179 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1182 /* If we still haven't got anything, return the last error. We
1187 /* Perform a partial memory transfer. For docs see target.h,
1190 static enum target_xfer_status
1191 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1192 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1193 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1195 enum target_xfer_status res
;
1197 /* Zero length requests are ok and require no work. */
1199 return TARGET_XFER_EOF
;
1201 memaddr
= address_significant (target_gdbarch (), memaddr
);
1203 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1204 breakpoint insns, thus hiding out from higher layers whether
1205 there are software breakpoints inserted in the code stream. */
1206 if (readbuf
!= NULL
)
1208 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1211 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1212 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1216 /* A large write request is likely to be partially satisfied
1217 by memory_xfer_partial_1. We will continually malloc
1218 and free a copy of the entire write request for breakpoint
1219 shadow handling even though we only end up writing a small
1220 subset of it. Cap writes to a limit specified by the target
1221 to mitigate this. */
1222 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1224 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1225 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1226 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1233 scoped_restore_tmpl
<int>
1234 make_scoped_restore_show_memory_breakpoints (int show
)
1236 return make_scoped_restore (&show_memory_breakpoints
, show
);
1239 /* For docs see target.h, to_xfer_partial. */
1241 enum target_xfer_status
1242 target_xfer_partial (struct target_ops
*ops
,
1243 enum target_object object
, const char *annex
,
1244 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1245 ULONGEST offset
, ULONGEST len
,
1246 ULONGEST
*xfered_len
)
1248 enum target_xfer_status retval
;
1250 /* Transfer is done when LEN is zero. */
1252 return TARGET_XFER_EOF
;
1254 if (writebuf
&& !may_write_memory
)
1255 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1256 core_addr_to_string_nz (offset
), plongest (len
));
1260 /* If this is a memory transfer, let the memory-specific code
1261 have a look at it instead. Memory transfers are more
1263 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1264 || object
== TARGET_OBJECT_CODE_MEMORY
)
1265 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1266 writebuf
, offset
, len
, xfered_len
);
1267 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1269 /* Skip/avoid accessing the target if the memory region
1270 attributes block the access. Check this here instead of in
1271 raw_memory_xfer_partial as otherwise we'd end up checking
1272 this twice in the case of the memory_xfer_partial path is
1273 taken; once before checking the dcache, and another in the
1274 tail call to raw_memory_xfer_partial. */
1275 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1277 return TARGET_XFER_E_IO
;
1279 /* Request the normal memory object from other layers. */
1280 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1284 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1285 writebuf
, offset
, len
, xfered_len
);
1289 const unsigned char *myaddr
= NULL
;
1291 fprintf_unfiltered (gdb_stdlog
,
1292 "%s:target_xfer_partial "
1293 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1296 (annex
? annex
: "(null)"),
1297 host_address_to_string (readbuf
),
1298 host_address_to_string (writebuf
),
1299 core_addr_to_string_nz (offset
),
1300 pulongest (len
), retval
,
1301 pulongest (*xfered_len
));
1307 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1311 fputs_unfiltered (", bytes =", gdb_stdlog
);
1312 for (i
= 0; i
< *xfered_len
; i
++)
1314 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1316 if (targetdebug
< 2 && i
> 0)
1318 fprintf_unfiltered (gdb_stdlog
, " ...");
1321 fprintf_unfiltered (gdb_stdlog
, "\n");
1324 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1328 fputc_unfiltered ('\n', gdb_stdlog
);
1331 /* Check implementations of to_xfer_partial update *XFERED_LEN
1332 properly. Do assertion after printing debug messages, so that we
1333 can find more clues on assertion failure from debugging messages. */
1334 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1335 gdb_assert (*xfered_len
> 0);
1340 /* Read LEN bytes of target memory at address MEMADDR, placing the
1341 results in GDB's memory at MYADDR. Returns either 0 for success or
1342 -1 if any error occurs.
1344 If an error occurs, no guarantee is made about the contents of the data at
1345 MYADDR. In particular, the caller should not depend upon partial reads
1346 filling the buffer with good data. There is no way for the caller to know
1347 how much good data might have been transfered anyway. Callers that can
1348 deal with partial reads should call target_read (which will retry until
1349 it makes no progress, and then return how much was transferred). */
1352 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1354 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1355 myaddr
, memaddr
, len
) == len
)
1361 /* See target/target.h. */
1364 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1369 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1372 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1373 gdbarch_byte_order (target_gdbarch ()));
1377 /* Like target_read_memory, but specify explicitly that this is a read
1378 from the target's raw memory. That is, this read bypasses the
1379 dcache, breakpoint shadowing, etc. */
1382 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1384 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1385 myaddr
, memaddr
, len
) == len
)
1391 /* Like target_read_memory, but specify explicitly that this is a read from
1392 the target's stack. This may trigger different cache behavior. */
1395 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1397 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1398 myaddr
, memaddr
, len
) == len
)
1404 /* Like target_read_memory, but specify explicitly that this is a read from
1405 the target's code. This may trigger different cache behavior. */
1408 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1410 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1411 myaddr
, memaddr
, len
) == len
)
1417 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1418 Returns either 0 for success or -1 if any error occurs. If an
1419 error occurs, no guarantee is made about how much data got written.
1420 Callers that can deal with partial writes should call
1424 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1426 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1427 myaddr
, memaddr
, len
) == len
)
1433 /* Write LEN bytes from MYADDR to target raw memory at address
1434 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1435 If an error occurs, no guarantee is made about how much data got
1436 written. Callers that can deal with partial writes should call
1440 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1442 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1443 myaddr
, memaddr
, len
) == len
)
1449 /* Fetch the target's memory map. */
1451 std::vector
<mem_region
>
1452 target_memory_map (void)
1454 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1455 if (result
.empty ())
1458 std::sort (result
.begin (), result
.end ());
1460 /* Check that regions do not overlap. Simultaneously assign
1461 a numbering for the "mem" commands to use to refer to
1463 mem_region
*last_one
= NULL
;
1464 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1466 mem_region
*this_one
= &result
[ix
];
1467 this_one
->number
= ix
;
1469 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1471 warning (_("Overlapping regions in memory map: ignoring"));
1472 return std::vector
<mem_region
> ();
1475 last_one
= this_one
;
1482 target_flash_erase (ULONGEST address
, LONGEST length
)
1484 current_top_target ()->flash_erase (address
, length
);
1488 target_flash_done (void)
1490 current_top_target ()->flash_done ();
1494 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1495 struct cmd_list_element
*c
, const char *value
)
1497 fprintf_filtered (file
,
1498 _("Mode for reading from readonly sections is %s.\n"),
1502 /* Target vector read/write partial wrapper functions. */
1504 static enum target_xfer_status
1505 target_read_partial (struct target_ops
*ops
,
1506 enum target_object object
,
1507 const char *annex
, gdb_byte
*buf
,
1508 ULONGEST offset
, ULONGEST len
,
1509 ULONGEST
*xfered_len
)
1511 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1515 static enum target_xfer_status
1516 target_write_partial (struct target_ops
*ops
,
1517 enum target_object object
,
1518 const char *annex
, const gdb_byte
*buf
,
1519 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1521 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1525 /* Wrappers to perform the full transfer. */
1527 /* For docs on target_read see target.h. */
1530 target_read (struct target_ops
*ops
,
1531 enum target_object object
,
1532 const char *annex
, gdb_byte
*buf
,
1533 ULONGEST offset
, LONGEST len
)
1535 LONGEST xfered_total
= 0;
1538 /* If we are reading from a memory object, find the length of an addressable
1539 unit for that architecture. */
1540 if (object
== TARGET_OBJECT_MEMORY
1541 || object
== TARGET_OBJECT_STACK_MEMORY
1542 || object
== TARGET_OBJECT_CODE_MEMORY
1543 || object
== TARGET_OBJECT_RAW_MEMORY
)
1544 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1546 while (xfered_total
< len
)
1548 ULONGEST xfered_partial
;
1549 enum target_xfer_status status
;
1551 status
= target_read_partial (ops
, object
, annex
,
1552 buf
+ xfered_total
* unit_size
,
1553 offset
+ xfered_total
, len
- xfered_total
,
1556 /* Call an observer, notifying them of the xfer progress? */
1557 if (status
== TARGET_XFER_EOF
)
1558 return xfered_total
;
1559 else if (status
== TARGET_XFER_OK
)
1561 xfered_total
+= xfered_partial
;
1565 return TARGET_XFER_E_IO
;
1571 /* Assuming that the entire [begin, end) range of memory cannot be
1572 read, try to read whatever subrange is possible to read.
1574 The function returns, in RESULT, either zero or one memory block.
1575 If there's a readable subrange at the beginning, it is completely
1576 read and returned. Any further readable subrange will not be read.
1577 Otherwise, if there's a readable subrange at the end, it will be
1578 completely read and returned. Any readable subranges before it
1579 (obviously, not starting at the beginning), will be ignored. In
1580 other cases -- either no readable subrange, or readable subrange(s)
1581 that is neither at the beginning, or end, nothing is returned.
1583 The purpose of this function is to handle a read across a boundary
1584 of accessible memory in a case when memory map is not available.
1585 The above restrictions are fine for this case, but will give
1586 incorrect results if the memory is 'patchy'. However, supporting
1587 'patchy' memory would require trying to read every single byte,
1588 and it seems unacceptable solution. Explicit memory map is
1589 recommended for this case -- and target_read_memory_robust will
1590 take care of reading multiple ranges then. */
1593 read_whatever_is_readable (struct target_ops
*ops
,
1594 const ULONGEST begin
, const ULONGEST end
,
1596 std::vector
<memory_read_result
> *result
)
1598 ULONGEST current_begin
= begin
;
1599 ULONGEST current_end
= end
;
1601 ULONGEST xfered_len
;
1603 /* If we previously failed to read 1 byte, nothing can be done here. */
1604 if (end
- begin
<= 1)
1607 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1609 /* Check that either first or the last byte is readable, and give up
1610 if not. This heuristic is meant to permit reading accessible memory
1611 at the boundary of accessible region. */
1612 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1613 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1618 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1619 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1620 &xfered_len
) == TARGET_XFER_OK
)
1628 /* Loop invariant is that the [current_begin, current_end) was previously
1629 found to be not readable as a whole.
1631 Note loop condition -- if the range has 1 byte, we can't divide the range
1632 so there's no point trying further. */
1633 while (current_end
- current_begin
> 1)
1635 ULONGEST first_half_begin
, first_half_end
;
1636 ULONGEST second_half_begin
, second_half_end
;
1638 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1642 first_half_begin
= current_begin
;
1643 first_half_end
= middle
;
1644 second_half_begin
= middle
;
1645 second_half_end
= current_end
;
1649 first_half_begin
= middle
;
1650 first_half_end
= current_end
;
1651 second_half_begin
= current_begin
;
1652 second_half_end
= middle
;
1655 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1656 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1658 first_half_end
- first_half_begin
);
1660 if (xfer
== first_half_end
- first_half_begin
)
1662 /* This half reads up fine. So, the error must be in the
1664 current_begin
= second_half_begin
;
1665 current_end
= second_half_end
;
1669 /* This half is not readable. Because we've tried one byte, we
1670 know some part of this half if actually readable. Go to the next
1671 iteration to divide again and try to read.
1673 We don't handle the other half, because this function only tries
1674 to read a single readable subrange. */
1675 current_begin
= first_half_begin
;
1676 current_end
= first_half_end
;
1682 /* The [begin, current_begin) range has been read. */
1683 result
->emplace_back (begin
, current_end
, std::move (buf
));
1687 /* The [current_end, end) range has been read. */
1688 LONGEST region_len
= end
- current_end
;
1690 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1691 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1692 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1693 region_len
* unit_size
);
1694 result
->emplace_back (current_end
, end
, std::move (data
));
1698 std::vector
<memory_read_result
>
1699 read_memory_robust (struct target_ops
*ops
,
1700 const ULONGEST offset
, const LONGEST len
)
1702 std::vector
<memory_read_result
> result
;
1703 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1705 LONGEST xfered_total
= 0;
1706 while (xfered_total
< len
)
1708 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1711 /* If there is no explicit region, a fake one should be created. */
1712 gdb_assert (region
);
1714 if (region
->hi
== 0)
1715 region_len
= len
- xfered_total
;
1717 region_len
= region
->hi
- offset
;
1719 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1721 /* Cannot read this region. Note that we can end up here only
1722 if the region is explicitly marked inaccessible, or
1723 'inaccessible-by-default' is in effect. */
1724 xfered_total
+= region_len
;
1728 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1729 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1730 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1732 LONGEST xfered_partial
=
1733 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1734 offset
+ xfered_total
, to_read
);
1735 /* Call an observer, notifying them of the xfer progress? */
1736 if (xfered_partial
<= 0)
1738 /* Got an error reading full chunk. See if maybe we can read
1740 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1741 offset
+ xfered_total
+ to_read
,
1742 unit_size
, &result
);
1743 xfered_total
+= to_read
;
1747 result
.emplace_back (offset
+ xfered_total
,
1748 offset
+ xfered_total
+ xfered_partial
,
1749 std::move (buffer
));
1750 xfered_total
+= xfered_partial
;
1760 /* An alternative to target_write with progress callbacks. */
1763 target_write_with_progress (struct target_ops
*ops
,
1764 enum target_object object
,
1765 const char *annex
, const gdb_byte
*buf
,
1766 ULONGEST offset
, LONGEST len
,
1767 void (*progress
) (ULONGEST
, void *), void *baton
)
1769 LONGEST xfered_total
= 0;
1772 /* If we are writing to a memory object, find the length of an addressable
1773 unit for that architecture. */
1774 if (object
== TARGET_OBJECT_MEMORY
1775 || object
== TARGET_OBJECT_STACK_MEMORY
1776 || object
== TARGET_OBJECT_CODE_MEMORY
1777 || object
== TARGET_OBJECT_RAW_MEMORY
)
1778 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1780 /* Give the progress callback a chance to set up. */
1782 (*progress
) (0, baton
);
1784 while (xfered_total
< len
)
1786 ULONGEST xfered_partial
;
1787 enum target_xfer_status status
;
1789 status
= target_write_partial (ops
, object
, annex
,
1790 buf
+ xfered_total
* unit_size
,
1791 offset
+ xfered_total
, len
- xfered_total
,
1794 if (status
!= TARGET_XFER_OK
)
1795 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1798 (*progress
) (xfered_partial
, baton
);
1800 xfered_total
+= xfered_partial
;
1806 /* For docs on target_write see target.h. */
1809 target_write (struct target_ops
*ops
,
1810 enum target_object object
,
1811 const char *annex
, const gdb_byte
*buf
,
1812 ULONGEST offset
, LONGEST len
)
1814 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1818 /* Help for target_read_alloc and target_read_stralloc. See their comments
1821 template <typename T
>
1822 gdb::optional
<gdb::def_vector
<T
>>
1823 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1826 gdb::def_vector
<T
> buf
;
1828 const int chunk
= 4096;
1830 /* This function does not have a length parameter; it reads the
1831 entire OBJECT). Also, it doesn't support objects fetched partly
1832 from one target and partly from another (in a different stratum,
1833 e.g. a core file and an executable). Both reasons make it
1834 unsuitable for reading memory. */
1835 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1837 /* Start by reading up to 4K at a time. The target will throttle
1838 this number down if necessary. */
1841 ULONGEST xfered_len
;
1842 enum target_xfer_status status
;
1844 buf
.resize (buf_pos
+ chunk
);
1846 status
= target_read_partial (ops
, object
, annex
,
1847 (gdb_byte
*) &buf
[buf_pos
],
1851 if (status
== TARGET_XFER_EOF
)
1853 /* Read all there was. */
1854 buf
.resize (buf_pos
);
1857 else if (status
!= TARGET_XFER_OK
)
1859 /* An error occurred. */
1863 buf_pos
+= xfered_len
;
1871 gdb::optional
<gdb::byte_vector
>
1872 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1875 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1880 gdb::optional
<gdb::char_vector
>
1881 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1884 gdb::optional
<gdb::char_vector
> buf
1885 = target_read_alloc_1
<char> (ops
, object
, annex
);
1890 if (buf
->back () != '\0')
1891 buf
->push_back ('\0');
1893 /* Check for embedded NUL bytes; but allow trailing NULs. */
1894 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1895 it
!= buf
->end (); it
++)
1898 warning (_("target object %d, annex %s, "
1899 "contained unexpected null characters"),
1900 (int) object
, annex
? annex
: "(none)");
1907 /* Memory transfer methods. */
1910 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1913 /* This method is used to read from an alternate, non-current
1914 target. This read must bypass the overlay support (as symbols
1915 don't match this target), and GDB's internal cache (wrong cache
1916 for this target). */
1917 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1919 memory_error (TARGET_XFER_E_IO
, addr
);
1923 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1924 int len
, enum bfd_endian byte_order
)
1926 gdb_byte buf
[sizeof (ULONGEST
)];
1928 gdb_assert (len
<= sizeof (buf
));
1929 get_target_memory (ops
, addr
, buf
, len
);
1930 return extract_unsigned_integer (buf
, len
, byte_order
);
1936 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1937 struct bp_target_info
*bp_tgt
)
1939 if (!may_insert_breakpoints
)
1941 warning (_("May not insert breakpoints"));
1945 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1951 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1952 struct bp_target_info
*bp_tgt
,
1953 enum remove_bp_reason reason
)
1955 /* This is kind of a weird case to handle, but the permission might
1956 have been changed after breakpoints were inserted - in which case
1957 we should just take the user literally and assume that any
1958 breakpoints should be left in place. */
1959 if (!may_insert_breakpoints
)
1961 warning (_("May not remove breakpoints"));
1965 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1969 info_target_command (const char *args
, int from_tty
)
1971 struct target_ops
*t
;
1972 int has_all_mem
= 0;
1974 if (symfile_objfile
!= NULL
)
1975 printf_unfiltered (_("Symbols from \"%s\".\n"),
1976 objfile_name (symfile_objfile
));
1978 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
1980 if (!t
->has_memory ())
1983 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1986 printf_unfiltered (_("\tWhile running this, "
1987 "GDB does not access memory from...\n"));
1988 printf_unfiltered ("%s:\n", t
->longname ());
1990 has_all_mem
= t
->has_all_memory ();
1994 /* This function is called before any new inferior is created, e.g.
1995 by running a program, attaching, or connecting to a target.
1996 It cleans up any state from previous invocations which might
1997 change between runs. This is a subset of what target_preopen
1998 resets (things which might change between targets). */
2001 target_pre_inferior (int from_tty
)
2003 /* Clear out solib state. Otherwise the solib state of the previous
2004 inferior might have survived and is entirely wrong for the new
2005 target. This has been observed on GNU/Linux using glibc 2.3. How
2017 Cannot access memory at address 0xdeadbeef
2020 /* In some OSs, the shared library list is the same/global/shared
2021 across inferiors. If code is shared between processes, so are
2022 memory regions and features. */
2023 if (!gdbarch_has_global_solist (target_gdbarch ()))
2025 no_shared_libraries (NULL
, from_tty
);
2027 invalidate_target_mem_regions ();
2029 target_clear_description ();
2032 /* attach_flag may be set if the previous process associated with
2033 the inferior was attached to. */
2034 current_inferior ()->attach_flag
= 0;
2036 current_inferior ()->highest_thread_num
= 0;
2038 agent_capability_invalidate ();
2041 /* Callback for iterate_over_inferiors. Gets rid of the given
2045 dispose_inferior (struct inferior
*inf
, void *args
)
2047 struct thread_info
*thread
;
2049 thread
= any_thread_of_process (inf
->pid
);
2052 switch_to_thread (thread
->ptid
);
2054 /* Core inferiors actually should be detached, not killed. */
2055 if (target_has_execution
)
2058 target_detach (inf
, 0);
2064 /* This is to be called by the open routine before it does
2068 target_preopen (int from_tty
)
2072 if (have_inferiors ())
2075 || !have_live_inferiors ()
2076 || query (_("A program is being debugged already. Kill it? ")))
2077 iterate_over_inferiors (dispose_inferior
, NULL
);
2079 error (_("Program not killed."));
2082 /* Calling target_kill may remove the target from the stack. But if
2083 it doesn't (which seems like a win for UDI), remove it now. */
2084 /* Leave the exec target, though. The user may be switching from a
2085 live process to a core of the same program. */
2086 pop_all_targets_above (file_stratum
);
2088 target_pre_inferior (from_tty
);
2094 target_detach (inferior
*inf
, int from_tty
)
2096 /* As long as some to_detach implementations rely on the current_inferior
2097 (either directly, or indirectly, like through target_gdbarch or by
2098 reading memory), INF needs to be the current inferior. When that
2099 requirement will become no longer true, then we can remove this
2101 gdb_assert (inf
== current_inferior ());
2103 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2104 /* Don't remove global breakpoints here. They're removed on
2105 disconnection from the target. */
2108 /* If we're in breakpoints-always-inserted mode, have to remove
2109 them before detaching. */
2110 remove_breakpoints_pid (ptid_get_pid (inferior_ptid
));
2112 prepare_for_detach ();
2114 current_top_target ()->detach (inf
, from_tty
);
2118 target_disconnect (const char *args
, int from_tty
)
2120 /* If we're in breakpoints-always-inserted mode or if breakpoints
2121 are global across processes, we have to remove them before
2123 remove_breakpoints ();
2125 current_top_target ()->disconnect (args
, from_tty
);
2128 /* See target/target.h. */
2131 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2133 return current_top_target ()->wait (ptid
, status
, options
);
2139 default_target_wait (struct target_ops
*ops
,
2140 ptid_t ptid
, struct target_waitstatus
*status
,
2143 status
->kind
= TARGET_WAITKIND_IGNORE
;
2144 return minus_one_ptid
;
2148 target_pid_to_str (ptid_t ptid
)
2150 return current_top_target ()->pid_to_str (ptid
);
2154 target_thread_name (struct thread_info
*info
)
2156 return current_top_target ()->thread_name (info
);
2159 struct thread_info
*
2160 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2162 struct inferior
*inf
)
2164 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2169 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2171 target_dcache_invalidate ();
2173 current_top_target ()->resume (ptid
, step
, signal
);
2175 registers_changed_ptid (ptid
);
2176 /* We only set the internal executing state here. The user/frontend
2177 running state is set at a higher level. */
2178 set_executing (ptid
, 1);
2179 clear_inline_frame_state (ptid
);
2182 /* If true, target_commit_resume is a nop. */
2183 static int defer_target_commit_resume
;
2188 target_commit_resume (void)
2190 if (defer_target_commit_resume
)
2193 current_top_target ()->commit_resume ();
2198 scoped_restore_tmpl
<int>
2199 make_scoped_defer_target_commit_resume ()
2201 return make_scoped_restore (&defer_target_commit_resume
, 1);
2205 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2207 current_top_target ()->pass_signals (numsigs
, pass_signals
);
2211 target_program_signals (int numsigs
, unsigned char *program_signals
)
2213 current_top_target ()->program_signals (numsigs
, program_signals
);
2217 default_follow_fork (struct target_ops
*self
, int follow_child
,
2220 /* Some target returned a fork event, but did not know how to follow it. */
2221 internal_error (__FILE__
, __LINE__
,
2222 _("could not find a target to follow fork"));
2225 /* Look through the list of possible targets for a target that can
2229 target_follow_fork (int follow_child
, int detach_fork
)
2231 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2234 /* Target wrapper for follow exec hook. */
2237 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2239 current_top_target ()->follow_exec (inf
, execd_pathname
);
2243 default_mourn_inferior (struct target_ops
*self
)
2245 internal_error (__FILE__
, __LINE__
,
2246 _("could not find a target to follow mourn inferior"));
2250 target_mourn_inferior (ptid_t ptid
)
2252 gdb_assert (ptid_equal (ptid
, inferior_ptid
));
2253 current_top_target ()->mourn_inferior ();
2255 /* We no longer need to keep handles on any of the object files.
2256 Make sure to release them to avoid unnecessarily locking any
2257 of them while we're not actually debugging. */
2258 bfd_cache_close_all ();
2261 /* Look for a target which can describe architectural features, starting
2262 from TARGET. If we find one, return its description. */
2264 const struct target_desc
*
2265 target_read_description (struct target_ops
*target
)
2267 return target
->read_description ();
2270 /* This implements a basic search of memory, reading target memory and
2271 performing the search here (as opposed to performing the search in on the
2272 target side with, for example, gdbserver). */
2275 simple_search_memory (struct target_ops
*ops
,
2276 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2277 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2278 CORE_ADDR
*found_addrp
)
2280 /* NOTE: also defined in find.c testcase. */
2281 #define SEARCH_CHUNK_SIZE 16000
2282 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2283 /* Buffer to hold memory contents for searching. */
2284 unsigned search_buf_size
;
2286 search_buf_size
= chunk_size
+ pattern_len
- 1;
2288 /* No point in trying to allocate a buffer larger than the search space. */
2289 if (search_space_len
< search_buf_size
)
2290 search_buf_size
= search_space_len
;
2292 gdb::byte_vector
search_buf (search_buf_size
);
2294 /* Prime the search buffer. */
2296 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2297 search_buf
.data (), start_addr
, search_buf_size
)
2300 warning (_("Unable to access %s bytes of target "
2301 "memory at %s, halting search."),
2302 pulongest (search_buf_size
), hex_string (start_addr
));
2306 /* Perform the search.
2308 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2309 When we've scanned N bytes we copy the trailing bytes to the start and
2310 read in another N bytes. */
2312 while (search_space_len
>= pattern_len
)
2314 gdb_byte
*found_ptr
;
2315 unsigned nr_search_bytes
2316 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2318 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2319 pattern
, pattern_len
);
2321 if (found_ptr
!= NULL
)
2323 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2325 *found_addrp
= found_addr
;
2329 /* Not found in this chunk, skip to next chunk. */
2331 /* Don't let search_space_len wrap here, it's unsigned. */
2332 if (search_space_len
>= chunk_size
)
2333 search_space_len
-= chunk_size
;
2335 search_space_len
= 0;
2337 if (search_space_len
>= pattern_len
)
2339 unsigned keep_len
= search_buf_size
- chunk_size
;
2340 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2343 /* Copy the trailing part of the previous iteration to the front
2344 of the buffer for the next iteration. */
2345 gdb_assert (keep_len
== pattern_len
- 1);
2346 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2348 nr_to_read
= std::min (search_space_len
- keep_len
,
2349 (ULONGEST
) chunk_size
);
2351 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2352 &search_buf
[keep_len
], read_addr
,
2353 nr_to_read
) != nr_to_read
)
2355 warning (_("Unable to access %s bytes of target "
2356 "memory at %s, halting search."),
2357 plongest (nr_to_read
),
2358 hex_string (read_addr
));
2362 start_addr
+= chunk_size
;
2371 /* Default implementation of memory-searching. */
2374 default_search_memory (struct target_ops
*self
,
2375 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2376 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2377 CORE_ADDR
*found_addrp
)
2379 /* Start over from the top of the target stack. */
2380 return simple_search_memory (current_top_target (),
2381 start_addr
, search_space_len
,
2382 pattern
, pattern_len
, found_addrp
);
2385 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2386 sequence of bytes in PATTERN with length PATTERN_LEN.
2388 The result is 1 if found, 0 if not found, and -1 if there was an error
2389 requiring halting of the search (e.g. memory read error).
2390 If the pattern is found the address is recorded in FOUND_ADDRP. */
2393 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2394 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2395 CORE_ADDR
*found_addrp
)
2397 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2398 pattern
, pattern_len
, found_addrp
);
2401 /* Look through the currently pushed targets. If none of them will
2402 be able to restart the currently running process, issue an error
2406 target_require_runnable (void)
2408 struct target_ops
*t
;
2410 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
2412 /* If this target knows how to create a new program, then
2413 assume we will still be able to after killing the current
2414 one. Either killing and mourning will not pop T, or else
2415 find_default_run_target will find it again. */
2416 if (t
->can_create_inferior ())
2419 /* Do not worry about targets at certain strata that can not
2420 create inferiors. Assume they will be pushed again if
2421 necessary, and continue to the process_stratum. */
2422 if (t
->to_stratum
> process_stratum
)
2425 error (_("The \"%s\" target does not support \"run\". "
2426 "Try \"help target\" or \"continue\"."),
2430 /* This function is only called if the target is running. In that
2431 case there should have been a process_stratum target and it
2432 should either know how to create inferiors, or not... */
2433 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2436 /* Whether GDB is allowed to fall back to the default run target for
2437 "run", "attach", etc. when no target is connected yet. */
2438 static int auto_connect_native_target
= 1;
2441 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2442 struct cmd_list_element
*c
, const char *value
)
2444 fprintf_filtered (file
,
2445 _("Whether GDB may automatically connect to the "
2446 "native target is %s.\n"),
2450 /* A pointer to the target that can respond to "run" or "attach".
2451 Native targets are always singletons and instantiated early at GDB
2453 static target_ops
*the_native_target
;
2458 set_native_target (target_ops
*target
)
2460 if (the_native_target
!= NULL
)
2461 internal_error (__FILE__
, __LINE__
,
2462 _("native target already set (\"%s\")."),
2463 the_native_target
->longname ());
2465 the_native_target
= target
;
2471 get_native_target ()
2473 return the_native_target
;
2476 /* Look through the list of possible targets for a target that can
2477 execute a run or attach command without any other data. This is
2478 used to locate the default process stratum.
2480 If DO_MESG is not NULL, the result is always valid (error() is
2481 called for errors); else, return NULL on error. */
2483 static struct target_ops
*
2484 find_default_run_target (const char *do_mesg
)
2486 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2487 return the_native_target
;
2489 if (do_mesg
!= NULL
)
2490 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2497 find_attach_target (void)
2499 /* If a target on the current stack can attach, use it. */
2500 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
2502 if (t
->can_attach ())
2506 /* Otherwise, use the default run target for attaching. */
2507 return find_default_run_target ("attach");
2513 find_run_target (void)
2515 /* If a target on the current stack can run, use it. */
2516 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
2518 if (t
->can_create_inferior ())
2522 /* Otherwise, use the default run target. */
2523 return find_default_run_target ("run");
2527 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2532 /* Implement the "info proc" command. */
2535 target_info_proc (const char *args
, enum info_proc_what what
)
2537 struct target_ops
*t
;
2539 /* If we're already connected to something that can get us OS
2540 related data, use it. Otherwise, try using the native
2542 t
= find_target_at (process_stratum
);
2544 t
= find_default_run_target (NULL
);
2546 for (; t
!= NULL
; t
= t
->beneath
)
2548 if (t
->info_proc (args
, what
))
2551 fprintf_unfiltered (gdb_stdlog
,
2552 "target_info_proc (\"%s\", %d)\n", args
, what
);
2562 find_default_supports_disable_randomization (struct target_ops
*self
)
2564 struct target_ops
*t
;
2566 t
= find_default_run_target (NULL
);
2568 return t
->supports_disable_randomization ();
2573 target_supports_disable_randomization (void)
2575 return current_top_target ()->supports_disable_randomization ();
2578 /* See target/target.h. */
2581 target_supports_multi_process (void)
2583 return current_top_target ()->supports_multi_process ();
2588 gdb::optional
<gdb::char_vector
>
2589 target_get_osdata (const char *type
)
2591 struct target_ops
*t
;
2593 /* If we're already connected to something that can get us OS
2594 related data, use it. Otherwise, try using the native
2596 t
= find_target_at (process_stratum
);
2598 t
= find_default_run_target ("get OS data");
2603 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2606 static struct address_space
*
2607 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2609 struct inferior
*inf
;
2611 /* Fall-back to the "main" address space of the inferior. */
2612 inf
= find_inferior_ptid (ptid
);
2614 if (inf
== NULL
|| inf
->aspace
== NULL
)
2615 internal_error (__FILE__
, __LINE__
,
2616 _("Can't determine the current "
2617 "address space of thread %s\n"),
2618 target_pid_to_str (ptid
));
2623 /* Determine the current address space of thread PTID. */
2625 struct address_space
*
2626 target_thread_address_space (ptid_t ptid
)
2628 struct address_space
*aspace
;
2630 aspace
= current_top_target ()->thread_address_space (ptid
);
2631 gdb_assert (aspace
!= NULL
);
2637 target_ops::close ()
2642 target_ops::can_attach ()
2648 target_ops::attach (const char *, int)
2650 gdb_assert_not_reached ("target_ops::attach called");
2654 target_ops::can_create_inferior ()
2660 target_ops::create_inferior (const char *, const std::string
&,
2663 gdb_assert_not_reached ("target_ops::create_inferior called");
2667 target_ops::can_run ()
2675 struct target_ops
*t
;
2677 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
2686 /* Target file operations. */
2688 static struct target_ops
*
2689 default_fileio_target (void)
2691 struct target_ops
*t
;
2693 /* If we're already connected to something that can perform
2694 file I/O, use it. Otherwise, try using the native target. */
2695 t
= find_target_at (process_stratum
);
2698 return find_default_run_target ("file I/O");
2701 /* File handle for target file operations. */
2705 /* The target on which this file is open. NULL if the target is
2706 meanwhile closed while the handle is open. */
2709 /* The file descriptor on the target. */
2712 /* Check whether this fileio_fh_t represents a closed file. */
2715 return target_fd
< 0;
2719 /* Vector of currently open file handles. The value returned by
2720 target_fileio_open and passed as the FD argument to other
2721 target_fileio_* functions is an index into this vector. This
2722 vector's entries are never freed; instead, files are marked as
2723 closed, and the handle becomes available for reuse. */
2724 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2726 /* Index into fileio_fhandles of the lowest handle that might be
2727 closed. This permits handle reuse without searching the whole
2728 list each time a new file is opened. */
2729 static int lowest_closed_fd
;
2731 /* Invalidate the target associated with open handles that were open
2732 on target TARG, since we're about to close (and maybe destroy) the
2733 target. The handles remain open from the client's perspective, but
2734 trying to do anything with them other than closing them will fail
2738 fileio_handles_invalidate_target (target_ops
*targ
)
2740 for (fileio_fh_t
&fh
: fileio_fhandles
)
2741 if (fh
.target
== targ
)
2745 /* Acquire a target fileio file descriptor. */
2748 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2750 /* Search for closed handles to reuse. */
2751 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2753 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2755 if (fh
.is_closed ())
2759 /* Push a new handle if no closed handles were found. */
2760 if (lowest_closed_fd
== fileio_fhandles
.size ())
2761 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2763 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2765 /* Should no longer be marked closed. */
2766 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2768 /* Return its index, and start the next lookup at
2770 return lowest_closed_fd
++;
2773 /* Release a target fileio file descriptor. */
2776 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2779 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2782 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2784 static fileio_fh_t
*
2785 fileio_fd_to_fh (int fd
)
2787 return &fileio_fhandles
[fd
];
2791 /* Default implementations of file i/o methods. We don't want these
2792 to delegate automatically, because we need to know which target
2793 supported the method, in order to call it directly from within
2794 pread/pwrite, etc. */
2797 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2798 int flags
, int mode
, int warn_if_slow
,
2801 *target_errno
= FILEIO_ENOSYS
;
2806 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2807 ULONGEST offset
, int *target_errno
)
2809 *target_errno
= FILEIO_ENOSYS
;
2814 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2815 ULONGEST offset
, int *target_errno
)
2817 *target_errno
= FILEIO_ENOSYS
;
2822 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2824 *target_errno
= FILEIO_ENOSYS
;
2829 target_ops::fileio_close (int fd
, int *target_errno
)
2831 *target_errno
= FILEIO_ENOSYS
;
2836 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2839 *target_errno
= FILEIO_ENOSYS
;
2843 gdb::optional
<std::string
>
2844 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2847 *target_errno
= FILEIO_ENOSYS
;
2851 /* Helper for target_fileio_open and
2852 target_fileio_open_warn_if_slow. */
2855 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2856 int flags
, int mode
, int warn_if_slow
,
2859 struct target_ops
*t
;
2861 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
2863 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2864 warn_if_slow
, target_errno
);
2866 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2872 fd
= acquire_fileio_fd (t
, fd
);
2875 fprintf_unfiltered (gdb_stdlog
,
2876 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2878 inf
== NULL
? 0 : inf
->num
,
2879 filename
, flags
, mode
,
2881 fd
!= -1 ? 0 : *target_errno
);
2885 *target_errno
= FILEIO_ENOSYS
;
2892 target_fileio_open (struct inferior
*inf
, const char *filename
,
2893 int flags
, int mode
, int *target_errno
)
2895 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2902 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2903 const char *filename
,
2904 int flags
, int mode
, int *target_errno
)
2906 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2913 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2914 ULONGEST offset
, int *target_errno
)
2916 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2919 if (fh
->is_closed ())
2920 *target_errno
= EBADF
;
2921 else if (fh
->target
== NULL
)
2922 *target_errno
= EIO
;
2924 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2925 len
, offset
, target_errno
);
2928 fprintf_unfiltered (gdb_stdlog
,
2929 "target_fileio_pwrite (%d,...,%d,%s) "
2931 fd
, len
, pulongest (offset
),
2932 ret
, ret
!= -1 ? 0 : *target_errno
);
2939 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2940 ULONGEST offset
, int *target_errno
)
2942 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2945 if (fh
->is_closed ())
2946 *target_errno
= EBADF
;
2947 else if (fh
->target
== NULL
)
2948 *target_errno
= EIO
;
2950 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2951 len
, offset
, target_errno
);
2954 fprintf_unfiltered (gdb_stdlog
,
2955 "target_fileio_pread (%d,...,%d,%s) "
2957 fd
, len
, pulongest (offset
),
2958 ret
, ret
!= -1 ? 0 : *target_errno
);
2965 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2967 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2970 if (fh
->is_closed ())
2971 *target_errno
= EBADF
;
2972 else if (fh
->target
== NULL
)
2973 *target_errno
= EIO
;
2975 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2978 fprintf_unfiltered (gdb_stdlog
,
2979 "target_fileio_fstat (%d) = %d (%d)\n",
2980 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2987 target_fileio_close (int fd
, int *target_errno
)
2989 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2992 if (fh
->is_closed ())
2993 *target_errno
= EBADF
;
2996 if (fh
->target
!= NULL
)
2997 ret
= fh
->target
->fileio_close (fh
->target_fd
,
3001 release_fileio_fd (fd
, fh
);
3005 fprintf_unfiltered (gdb_stdlog
,
3006 "target_fileio_close (%d) = %d (%d)\n",
3007 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3014 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3017 struct target_ops
*t
;
3019 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3021 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3023 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3027 fprintf_unfiltered (gdb_stdlog
,
3028 "target_fileio_unlink (%d,%s)"
3030 inf
== NULL
? 0 : inf
->num
, filename
,
3031 ret
, ret
!= -1 ? 0 : *target_errno
);
3035 *target_errno
= FILEIO_ENOSYS
;
3041 gdb::optional
<std::string
>
3042 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3045 struct target_ops
*t
;
3047 for (t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath
)
3049 gdb::optional
<std::string
> ret
3050 = t
->fileio_readlink (inf
, filename
, target_errno
);
3052 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3056 fprintf_unfiltered (gdb_stdlog
,
3057 "target_fileio_readlink (%d,%s)"
3059 inf
== NULL
? 0 : inf
->num
,
3060 filename
, ret
? ret
->c_str () : "(nil)",
3061 ret
? 0 : *target_errno
);
3065 *target_errno
= FILEIO_ENOSYS
;
3069 /* Like scoped_fd, but specific to target fileio. */
3071 class scoped_target_fd
3074 explicit scoped_target_fd (int fd
) noexcept
3079 ~scoped_target_fd ()
3085 target_fileio_close (m_fd
, &target_errno
);
3089 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3091 int get () const noexcept
3100 /* Read target file FILENAME, in the filesystem as seen by INF. If
3101 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3102 remote targets, the remote stub). Store the result in *BUF_P and
3103 return the size of the transferred data. PADDING additional bytes
3104 are available in *BUF_P. This is a helper function for
3105 target_fileio_read_alloc; see the declaration of that function for
3106 more information. */
3109 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3110 gdb_byte
**buf_p
, int padding
)
3112 size_t buf_alloc
, buf_pos
;
3117 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3118 0700, &target_errno
));
3119 if (fd
.get () == -1)
3122 /* Start by reading up to 4K at a time. The target will throttle
3123 this number down if necessary. */
3125 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3129 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3130 buf_alloc
- buf_pos
- padding
, buf_pos
,
3134 /* An error occurred. */
3140 /* Read all there was. */
3150 /* If the buffer is filling up, expand it. */
3151 if (buf_alloc
< buf_pos
* 2)
3154 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3164 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3167 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3172 gdb::unique_xmalloc_ptr
<char>
3173 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3177 LONGEST i
, transferred
;
3179 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3180 bufstr
= (char *) buffer
;
3182 if (transferred
< 0)
3183 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3185 if (transferred
== 0)
3186 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
3188 bufstr
[transferred
] = 0;
3190 /* Check for embedded NUL bytes; but allow trailing NULs. */
3191 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3194 warning (_("target file %s "
3195 "contained unexpected null characters"),
3200 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3205 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3206 CORE_ADDR addr
, int len
)
3208 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3212 default_watchpoint_addr_within_range (struct target_ops
*target
,
3214 CORE_ADDR start
, int length
)
3216 return addr
>= start
&& addr
< start
+ length
;
3219 static struct gdbarch
*
3220 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3222 inferior
*inf
= find_inferior_ptid (ptid
);
3223 gdb_assert (inf
!= NULL
);
3224 return inf
->gdbarch
;
3228 * Find the next target down the stack from the specified target.
3232 find_target_beneath (struct target_ops
*t
)
3240 find_target_at (enum strata stratum
)
3242 struct target_ops
*t
;
3244 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
3245 if (t
->to_stratum
== stratum
)
3256 target_announce_detach (int from_tty
)
3259 const char *exec_file
;
3264 exec_file
= get_exec_file (0);
3265 if (exec_file
== NULL
)
3268 pid
= ptid_get_pid (inferior_ptid
);
3269 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3270 target_pid_to_str (pid_to_ptid (pid
)));
3271 gdb_flush (gdb_stdout
);
3274 /* The inferior process has died. Long live the inferior! */
3277 generic_mourn_inferior (void)
3281 ptid
= inferior_ptid
;
3282 inferior_ptid
= null_ptid
;
3284 /* Mark breakpoints uninserted in case something tries to delete a
3285 breakpoint while we delete the inferior's threads (which would
3286 fail, since the inferior is long gone). */
3287 mark_breakpoints_out ();
3289 if (!ptid_equal (ptid
, null_ptid
))
3291 int pid
= ptid_get_pid (ptid
);
3292 exit_inferior (pid
);
3295 /* Note this wipes step-resume breakpoints, so needs to be done
3296 after exit_inferior, which ends up referencing the step-resume
3297 breakpoints through clear_thread_inferior_resources. */
3298 breakpoint_init_inferior (inf_exited
);
3300 registers_changed ();
3302 reopen_exec_file ();
3303 reinit_frame_cache ();
3305 if (deprecated_detach_hook
)
3306 deprecated_detach_hook ();
3309 /* Convert a normal process ID to a string. Returns the string in a
3313 normal_pid_to_str (ptid_t ptid
)
3315 static char buf
[32];
3317 xsnprintf (buf
, sizeof buf
, "process %d", ptid_get_pid (ptid
));
3322 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3324 return normal_pid_to_str (ptid
);
3327 /* Error-catcher for target_find_memory_regions. */
3329 dummy_find_memory_regions (struct target_ops
*self
,
3330 find_memory_region_ftype ignore1
, void *ignore2
)
3332 error (_("Command not implemented for this target."));
3336 /* Error-catcher for target_make_corefile_notes. */
3338 dummy_make_corefile_notes (struct target_ops
*self
,
3339 bfd
*ignore1
, int *ignore2
)
3341 error (_("Command not implemented for this target."));
3345 #include "target-delegates.c"
3348 static const target_info dummy_target_info
= {
3354 dummy_target::dummy_target ()
3356 to_stratum
= dummy_stratum
;
3359 debug_target::debug_target ()
3361 to_stratum
= debug_stratum
;
3365 dummy_target::info () const
3367 return dummy_target_info
;
3371 debug_target::info () const
3373 return beneath
->info ();
3379 target_close (struct target_ops
*targ
)
3381 gdb_assert (!target_is_pushed (targ
));
3383 fileio_handles_invalidate_target (targ
);
3388 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3392 target_thread_alive (ptid_t ptid
)
3394 return current_top_target ()->thread_alive (ptid
);
3398 target_update_thread_list (void)
3400 current_top_target ()->update_thread_list ();
3404 target_stop (ptid_t ptid
)
3408 warning (_("May not interrupt or stop the target, ignoring attempt"));
3412 current_top_target ()->stop (ptid
);
3420 warning (_("May not interrupt or stop the target, ignoring attempt"));
3424 current_top_target ()->interrupt ();
3430 target_pass_ctrlc (void)
3432 current_top_target ()->pass_ctrlc ();
3438 default_target_pass_ctrlc (struct target_ops
*ops
)
3440 target_interrupt ();
3443 /* See target/target.h. */
3446 target_stop_and_wait (ptid_t ptid
)
3448 struct target_waitstatus status
;
3449 int was_non_stop
= non_stop
;
3454 memset (&status
, 0, sizeof (status
));
3455 target_wait (ptid
, &status
, 0);
3457 non_stop
= was_non_stop
;
3460 /* See target/target.h. */
3463 target_continue_no_signal (ptid_t ptid
)
3465 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3468 /* See target/target.h. */
3471 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3473 target_resume (ptid
, 0, signal
);
3476 /* Concatenate ELEM to LIST, a comma separate list, and return the
3477 result. The LIST incoming argument is released. */
3480 str_comma_list_concat_elem (char *list
, const char *elem
)
3483 return xstrdup (elem
);
3485 return reconcat (list
, list
, ", ", elem
, (char *) NULL
);
3488 /* Helper for target_options_to_string. If OPT is present in
3489 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3490 Returns the new resulting string. OPT is removed from
3494 do_option (int *target_options
, char *ret
,
3495 int opt
, const char *opt_str
)
3497 if ((*target_options
& opt
) != 0)
3499 ret
= str_comma_list_concat_elem (ret
, opt_str
);
3500 *target_options
&= ~opt
;
3507 target_options_to_string (int target_options
)
3511 #define DO_TARG_OPTION(OPT) \
3512 ret = do_option (&target_options, ret, OPT, #OPT)
3514 DO_TARG_OPTION (TARGET_WNOHANG
);
3516 if (target_options
!= 0)
3517 ret
= str_comma_list_concat_elem (ret
, "unknown???");
3525 target_fetch_registers (struct regcache
*regcache
, int regno
)
3527 current_top_target ()->fetch_registers (regcache
, regno
);
3529 regcache
->debug_print_register ("target_fetch_registers", regno
);
3533 target_store_registers (struct regcache
*regcache
, int regno
)
3535 if (!may_write_registers
)
3536 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3538 current_top_target ()->store_registers (regcache
, regno
);
3541 regcache
->debug_print_register ("target_store_registers", regno
);
3546 target_core_of_thread (ptid_t ptid
)
3548 return current_top_target ()->core_of_thread (ptid
);
3552 simple_verify_memory (struct target_ops
*ops
,
3553 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3555 LONGEST total_xfered
= 0;
3557 while (total_xfered
< size
)
3559 ULONGEST xfered_len
;
3560 enum target_xfer_status status
;
3562 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3564 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3565 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3567 if (status
== TARGET_XFER_OK
3568 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3570 total_xfered
+= xfered_len
;
3579 /* Default implementation of memory verification. */
3582 default_verify_memory (struct target_ops
*self
,
3583 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3585 /* Start over from the top of the target stack. */
3586 return simple_verify_memory (current_top_target (),
3587 data
, memaddr
, size
);
3591 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3593 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3596 /* The documentation for this function is in its prototype declaration in
3600 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3601 enum target_hw_bp_type rw
)
3603 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3606 /* The documentation for this function is in its prototype declaration in
3610 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3611 enum target_hw_bp_type rw
)
3613 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3616 /* The documentation for this function is in its prototype declaration
3620 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3622 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3625 /* The documentation for this function is in its prototype declaration
3629 target_ranged_break_num_registers (void)
3631 return current_top_target ()->ranged_break_num_registers ();
3636 struct btrace_target_info
*
3637 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3639 return current_top_target ()->enable_btrace (ptid
, conf
);
3645 target_disable_btrace (struct btrace_target_info
*btinfo
)
3647 current_top_target ()->disable_btrace (btinfo
);
3653 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3655 current_top_target ()->teardown_btrace (btinfo
);
3661 target_read_btrace (struct btrace_data
*btrace
,
3662 struct btrace_target_info
*btinfo
,
3663 enum btrace_read_type type
)
3665 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3670 const struct btrace_config
*
3671 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3673 return current_top_target ()->btrace_conf (btinfo
);
3679 target_stop_recording (void)
3681 current_top_target ()->stop_recording ();
3687 target_save_record (const char *filename
)
3689 current_top_target ()->save_record (filename
);
3695 target_supports_delete_record ()
3697 return current_top_target ()->supports_delete_record ();
3703 target_delete_record (void)
3705 current_top_target ()->delete_record ();
3711 target_record_method (ptid_t ptid
)
3713 return current_top_target ()->record_method (ptid
);
3719 target_record_is_replaying (ptid_t ptid
)
3721 return current_top_target ()->record_is_replaying (ptid
);
3727 target_record_will_replay (ptid_t ptid
, int dir
)
3729 return current_top_target ()->record_will_replay (ptid
, dir
);
3735 target_record_stop_replaying (void)
3737 current_top_target ()->record_stop_replaying ();
3743 target_goto_record_begin (void)
3745 current_top_target ()->goto_record_begin ();
3751 target_goto_record_end (void)
3753 current_top_target ()->goto_record_end ();
3759 target_goto_record (ULONGEST insn
)
3761 current_top_target ()->goto_record (insn
);
3767 target_insn_history (int size
, gdb_disassembly_flags flags
)
3769 current_top_target ()->insn_history (size
, flags
);
3775 target_insn_history_from (ULONGEST from
, int size
,
3776 gdb_disassembly_flags flags
)
3778 current_top_target ()->insn_history_from (from
, size
, flags
);
3784 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3785 gdb_disassembly_flags flags
)
3787 current_top_target ()->insn_history_range (begin
, end
, flags
);
3793 target_call_history (int size
, record_print_flags flags
)
3795 current_top_target ()->call_history (size
, flags
);
3801 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3803 current_top_target ()->call_history_from (begin
, size
, flags
);
3809 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3811 current_top_target ()->call_history_range (begin
, end
, flags
);
3816 const struct frame_unwind
*
3817 target_get_unwinder (void)
3819 return current_top_target ()->get_unwinder ();
3824 const struct frame_unwind
*
3825 target_get_tailcall_unwinder (void)
3827 return current_top_target ()->get_tailcall_unwinder ();
3833 target_prepare_to_generate_core (void)
3835 current_top_target ()->prepare_to_generate_core ();
3841 target_done_generating_core (void)
3843 current_top_target ()->done_generating_core ();
3848 static char targ_desc
[] =
3849 "Names of targets and files being debugged.\nShows the entire \
3850 stack of targets currently in use (including the exec-file,\n\
3851 core-file, and process, if any), as well as the symbol file name.";
3854 default_rcmd (struct target_ops
*self
, const char *command
,
3855 struct ui_file
*output
)
3857 error (_("\"monitor\" command not supported by this target."));
3861 do_monitor_command (const char *cmd
, int from_tty
)
3863 target_rcmd (cmd
, gdb_stdtarg
);
3866 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3870 flash_erase_command (const char *cmd
, int from_tty
)
3872 /* Used to communicate termination of flash operations to the target. */
3873 bool found_flash_region
= false;
3874 struct gdbarch
*gdbarch
= target_gdbarch ();
3876 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3878 /* Iterate over all memory regions. */
3879 for (const mem_region
&m
: mem_regions
)
3881 /* Is this a flash memory region? */
3882 if (m
.attrib
.mode
== MEM_FLASH
)
3884 found_flash_region
= true;
3885 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3887 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3889 current_uiout
->message (_("Erasing flash memory region at address "));
3890 current_uiout
->field_fmt ("address", "%s", paddress (gdbarch
, m
.lo
));
3891 current_uiout
->message (", size = ");
3892 current_uiout
->field_fmt ("size", "%s", hex_string (m
.hi
- m
.lo
));
3893 current_uiout
->message ("\n");
3897 /* Did we do any flash operations? If so, we need to finalize them. */
3898 if (found_flash_region
)
3899 target_flash_done ();
3901 current_uiout
->message (_("No flash memory regions found.\n"));
3904 /* Print the name of each layers of our target stack. */
3907 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3909 struct target_ops
*t
;
3911 printf_filtered (_("The current target stack is:\n"));
3913 for (t
= current_top_target (); t
!= NULL
; t
= t
->beneath
)
3915 if (t
->to_stratum
== debug_stratum
)
3917 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3924 target_async (int enable
)
3926 infrun_async (enable
);
3927 current_top_target ()->async (enable
);
3933 target_thread_events (int enable
)
3935 current_top_target ()->thread_events (enable
);
3938 /* Controls if targets can report that they can/are async. This is
3939 just for maintainers to use when debugging gdb. */
3940 int target_async_permitted
= 1;
3942 /* The set command writes to this variable. If the inferior is
3943 executing, target_async_permitted is *not* updated. */
3944 static int target_async_permitted_1
= 1;
3947 maint_set_target_async_command (const char *args
, int from_tty
,
3948 struct cmd_list_element
*c
)
3950 if (have_live_inferiors ())
3952 target_async_permitted_1
= target_async_permitted
;
3953 error (_("Cannot change this setting while the inferior is running."));
3956 target_async_permitted
= target_async_permitted_1
;
3960 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3961 struct cmd_list_element
*c
,
3964 fprintf_filtered (file
,
3965 _("Controlling the inferior in "
3966 "asynchronous mode is %s.\n"), value
);
3969 /* Return true if the target operates in non-stop mode even with "set
3973 target_always_non_stop_p (void)
3975 return current_top_target ()->always_non_stop_p ();
3981 target_is_non_stop_p (void)
3984 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3985 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3986 && target_always_non_stop_p ()));
3989 /* Controls if targets can report that they always run in non-stop
3990 mode. This is just for maintainers to use when debugging gdb. */
3991 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3993 /* The set command writes to this variable. If the inferior is
3994 executing, target_non_stop_enabled is *not* updated. */
3995 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3997 /* Implementation of "maint set target-non-stop". */
4000 maint_set_target_non_stop_command (const char *args
, int from_tty
,
4001 struct cmd_list_element
*c
)
4003 if (have_live_inferiors ())
4005 target_non_stop_enabled_1
= target_non_stop_enabled
;
4006 error (_("Cannot change this setting while the inferior is running."));
4009 target_non_stop_enabled
= target_non_stop_enabled_1
;
4012 /* Implementation of "maint show target-non-stop". */
4015 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
4016 struct cmd_list_element
*c
,
4019 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
4020 fprintf_filtered (file
,
4021 _("Whether the target is always in non-stop mode "
4022 "is %s (currently %s).\n"), value
,
4023 target_always_non_stop_p () ? "on" : "off");
4025 fprintf_filtered (file
,
4026 _("Whether the target is always in non-stop mode "
4027 "is %s.\n"), value
);
4030 /* Temporary copies of permission settings. */
4032 static int may_write_registers_1
= 1;
4033 static int may_write_memory_1
= 1;
4034 static int may_insert_breakpoints_1
= 1;
4035 static int may_insert_tracepoints_1
= 1;
4036 static int may_insert_fast_tracepoints_1
= 1;
4037 static int may_stop_1
= 1;
4039 /* Make the user-set values match the real values again. */
4042 update_target_permissions (void)
4044 may_write_registers_1
= may_write_registers
;
4045 may_write_memory_1
= may_write_memory
;
4046 may_insert_breakpoints_1
= may_insert_breakpoints
;
4047 may_insert_tracepoints_1
= may_insert_tracepoints
;
4048 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4049 may_stop_1
= may_stop
;
4052 /* The one function handles (most of) the permission flags in the same
4056 set_target_permissions (const char *args
, int from_tty
,
4057 struct cmd_list_element
*c
)
4059 if (target_has_execution
)
4061 update_target_permissions ();
4062 error (_("Cannot change this setting while the inferior is running."));
4065 /* Make the real values match the user-changed values. */
4066 may_write_registers
= may_write_registers_1
;
4067 may_insert_breakpoints
= may_insert_breakpoints_1
;
4068 may_insert_tracepoints
= may_insert_tracepoints_1
;
4069 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4070 may_stop
= may_stop_1
;
4071 update_observer_mode ();
4074 /* Set memory write permission independently of observer mode. */
4077 set_write_memory_permission (const char *args
, int from_tty
,
4078 struct cmd_list_element
*c
)
4080 /* Make the real values match the user-changed values. */
4081 may_write_memory
= may_write_memory_1
;
4082 update_observer_mode ();
4086 initialize_targets (void)
4088 the_dummy_target
= new dummy_target ();
4089 push_target (the_dummy_target
);
4091 the_debug_target
= new debug_target ();
4093 add_info ("target", info_target_command
, targ_desc
);
4094 add_info ("files", info_target_command
, targ_desc
);
4096 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4097 Set target debugging."), _("\
4098 Show target debugging."), _("\
4099 When non-zero, target debugging is enabled. Higher numbers are more\n\
4103 &setdebuglist
, &showdebuglist
);
4105 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4106 &trust_readonly
, _("\
4107 Set mode for reading from readonly sections."), _("\
4108 Show mode for reading from readonly sections."), _("\
4109 When this mode is on, memory reads from readonly sections (such as .text)\n\
4110 will be read from the object file instead of from the target. This will\n\
4111 result in significant performance improvement for remote targets."),
4113 show_trust_readonly
,
4114 &setlist
, &showlist
);
4116 add_com ("monitor", class_obscure
, do_monitor_command
,
4117 _("Send a command to the remote monitor (remote targets only)."));
4119 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4120 _("Print the name of each layer of the internal target stack."),
4121 &maintenanceprintlist
);
4123 add_setshow_boolean_cmd ("target-async", no_class
,
4124 &target_async_permitted_1
, _("\
4125 Set whether gdb controls the inferior in asynchronous mode."), _("\
4126 Show whether gdb controls the inferior in asynchronous mode."), _("\
4127 Tells gdb whether to control the inferior in asynchronous mode."),
4128 maint_set_target_async_command
,
4129 maint_show_target_async_command
,
4130 &maintenance_set_cmdlist
,
4131 &maintenance_show_cmdlist
);
4133 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4134 &target_non_stop_enabled_1
, _("\
4135 Set whether gdb always controls the inferior in non-stop mode."), _("\
4136 Show whether gdb always controls the inferior in non-stop mode."), _("\
4137 Tells gdb whether to control the inferior in non-stop mode."),
4138 maint_set_target_non_stop_command
,
4139 maint_show_target_non_stop_command
,
4140 &maintenance_set_cmdlist
,
4141 &maintenance_show_cmdlist
);
4143 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4144 &may_write_registers_1
, _("\
4145 Set permission to write into registers."), _("\
4146 Show permission to write into registers."), _("\
4147 When this permission is on, GDB may write into the target's registers.\n\
4148 Otherwise, any sort of write attempt will result in an error."),
4149 set_target_permissions
, NULL
,
4150 &setlist
, &showlist
);
4152 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4153 &may_write_memory_1
, _("\
4154 Set permission to write into target memory."), _("\
4155 Show permission to write into target memory."), _("\
4156 When this permission is on, GDB may write into the target's memory.\n\
4157 Otherwise, any sort of write attempt will result in an error."),
4158 set_write_memory_permission
, NULL
,
4159 &setlist
, &showlist
);
4161 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4162 &may_insert_breakpoints_1
, _("\
4163 Set permission to insert breakpoints in the target."), _("\
4164 Show permission to insert breakpoints in the target."), _("\
4165 When this permission is on, GDB may insert breakpoints in the program.\n\
4166 Otherwise, any sort of insertion attempt will result in an error."),
4167 set_target_permissions
, NULL
,
4168 &setlist
, &showlist
);
4170 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4171 &may_insert_tracepoints_1
, _("\
4172 Set permission to insert tracepoints in the target."), _("\
4173 Show permission to insert tracepoints in the target."), _("\
4174 When this permission is on, GDB may insert tracepoints in the program.\n\
4175 Otherwise, any sort of insertion attempt will result in an error."),
4176 set_target_permissions
, NULL
,
4177 &setlist
, &showlist
);
4179 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4180 &may_insert_fast_tracepoints_1
, _("\
4181 Set permission to insert fast tracepoints in the target."), _("\
4182 Show permission to insert fast tracepoints in the target."), _("\
4183 When this permission is on, GDB may insert fast tracepoints.\n\
4184 Otherwise, any sort of insertion attempt will result in an error."),
4185 set_target_permissions
, NULL
,
4186 &setlist
, &showlist
);
4188 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4190 Set permission to interrupt or signal the target."), _("\
4191 Show permission to interrupt or signal the target."), _("\
4192 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4193 Otherwise, any attempt to interrupt or stop will be ignored."),
4194 set_target_permissions
, NULL
,
4195 &setlist
, &showlist
);
4197 add_com ("flash-erase", no_class
, flash_erase_command
,
4198 _("Erase all flash memory regions."));
4200 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4201 &auto_connect_native_target
, _("\
4202 Set whether GDB may automatically connect to the native target."), _("\
4203 Show whether GDB may automatically connect to the native target."), _("\
4204 When on, and GDB is not connected to a target yet, GDB\n\
4205 attempts \"run\" and other commands with the native target."),
4206 NULL
, show_auto_connect_native_target
,
4207 &setlist
, &showlist
);