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 /* The target stack. */
124 static target_stack g_target_stack
;
126 /* Top of target stack. */
127 /* The target structure we are currently using to talk to a process
128 or file or whatever "inferior" we have. */
131 current_top_target ()
133 return g_target_stack
.top ();
136 /* Command list for target. */
138 static struct cmd_list_element
*targetlist
= NULL
;
140 /* Nonzero if we should trust readonly sections from the
141 executable when reading memory. */
143 static int trust_readonly
= 0;
145 /* Nonzero if we should show true memory content including
146 memory breakpoint inserted by gdb. */
148 static int show_memory_breakpoints
= 0;
150 /* These globals control whether GDB attempts to perform these
151 operations; they are useful for targets that need to prevent
152 inadvertant disruption, such as in non-stop mode. */
154 int may_write_registers
= 1;
156 int may_write_memory
= 1;
158 int may_insert_breakpoints
= 1;
160 int may_insert_tracepoints
= 1;
162 int may_insert_fast_tracepoints
= 1;
166 /* Non-zero if we want to see trace of target level stuff. */
168 static unsigned int targetdebug
= 0;
171 set_targetdebug (const char *args
, int from_tty
, struct cmd_list_element
*c
)
174 push_target (the_debug_target
);
176 unpush_target (the_debug_target
);
180 show_targetdebug (struct ui_file
*file
, int from_tty
,
181 struct cmd_list_element
*c
, const char *value
)
183 fprintf_filtered (file
, _("Target debugging is %s.\n"), value
);
186 /* The user just typed 'target' without the name of a target. */
189 target_command (const char *arg
, int from_tty
)
191 fputs_filtered ("Argument required (target name). Try `help target'\n",
196 namespace selftests
{
198 /* A mock process_stratum target_ops that doesn't read/write registers
201 static const target_info test_target_info
= {
203 N_("unit tests target"),
204 N_("You should never see this"),
208 test_target_ops::info () const
210 return test_target_info
;
213 } /* namespace selftests */
214 #endif /* GDB_SELF_TEST */
216 /* Default target_has_* methods for process_stratum targets. */
219 default_child_has_all_memory ()
221 /* If no inferior selected, then we can't read memory here. */
222 if (inferior_ptid
== null_ptid
)
229 default_child_has_memory ()
231 /* If no inferior selected, then we can't read memory here. */
232 if (inferior_ptid
== null_ptid
)
239 default_child_has_stack ()
241 /* If no inferior selected, there's no stack. */
242 if (inferior_ptid
== null_ptid
)
249 default_child_has_registers ()
251 /* Can't read registers from no inferior. */
252 if (inferior_ptid
== null_ptid
)
259 default_child_has_execution (ptid_t the_ptid
)
261 /* If there's no thread selected, then we can't make it run through
263 if (the_ptid
== null_ptid
)
271 target_has_all_memory_1 (void)
273 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
274 if (t
->has_all_memory ())
281 target_has_memory_1 (void)
283 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
284 if (t
->has_memory ())
291 target_has_stack_1 (void)
293 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
301 target_has_registers_1 (void)
303 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
304 if (t
->has_registers ())
311 target_has_execution_1 (ptid_t the_ptid
)
313 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
314 if (t
->has_execution (the_ptid
))
321 target_has_execution_current (void)
323 return target_has_execution_1 (inferior_ptid
);
326 /* This is used to implement the various target commands. */
329 open_target (const char *args
, int from_tty
, struct cmd_list_element
*command
)
331 auto *ti
= static_cast<target_info
*> (get_cmd_context (command
));
332 target_open_ftype
*func
= target_factories
[ti
];
335 fprintf_unfiltered (gdb_stdlog
, "-> %s->open (...)\n",
338 func (args
, from_tty
);
341 fprintf_unfiltered (gdb_stdlog
, "<- %s->open (%s, %d)\n",
342 ti
->shortname
, args
, from_tty
);
348 add_target (const target_info
&t
, target_open_ftype
*func
,
349 completer_ftype
*completer
)
351 struct cmd_list_element
*c
;
353 auto &func_slot
= target_factories
[&t
];
354 if (func_slot
!= nullptr)
355 internal_error (__FILE__
, __LINE__
,
356 _("target already added (\"%s\")."), t
.shortname
);
359 if (targetlist
== NULL
)
360 add_prefix_cmd ("target", class_run
, target_command
, _("\
361 Connect to a target machine or process.\n\
362 The first argument is the type or protocol of the target machine.\n\
363 Remaining arguments are interpreted by the target protocol. For more\n\
364 information on the arguments for a particular protocol, type\n\
365 `help target ' followed by the protocol name."),
366 &targetlist
, "target ", 0, &cmdlist
);
367 c
= add_cmd (t
.shortname
, no_class
, t
.doc
, &targetlist
);
368 set_cmd_context (c
, (void *) &t
);
369 set_cmd_sfunc (c
, open_target
);
370 if (completer
!= NULL
)
371 set_cmd_completer (c
, completer
);
377 add_deprecated_target_alias (const target_info
&tinfo
, const char *alias
)
379 struct cmd_list_element
*c
;
382 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
384 c
= add_cmd (alias
, no_class
, tinfo
.doc
, &targetlist
);
385 set_cmd_sfunc (c
, open_target
);
386 set_cmd_context (c
, (void *) &tinfo
);
387 alt
= xstrprintf ("target %s", tinfo
.shortname
);
388 deprecate_cmd (c
, alt
);
396 current_top_target ()->kill ();
400 target_load (const char *arg
, int from_tty
)
402 target_dcache_invalidate ();
403 current_top_target ()->load (arg
, from_tty
);
408 target_terminal_state
target_terminal::m_terminal_state
409 = target_terminal_state::is_ours
;
411 /* See target/target.h. */
414 target_terminal::init (void)
416 current_top_target ()->terminal_init ();
418 m_terminal_state
= target_terminal_state::is_ours
;
421 /* See target/target.h. */
424 target_terminal::inferior (void)
426 struct ui
*ui
= current_ui
;
428 /* A background resume (``run&'') should leave GDB in control of the
430 if (ui
->prompt_state
!= PROMPT_BLOCKED
)
433 /* Since we always run the inferior in the main console (unless "set
434 inferior-tty" is in effect), when some UI other than the main one
435 calls target_terminal::inferior, then we leave the main UI's
436 terminal settings as is. */
440 /* If GDB is resuming the inferior in the foreground, install
441 inferior's terminal modes. */
443 struct inferior
*inf
= current_inferior ();
445 if (inf
->terminal_state
!= target_terminal_state::is_inferior
)
447 current_top_target ()->terminal_inferior ();
448 inf
->terminal_state
= target_terminal_state::is_inferior
;
451 m_terminal_state
= target_terminal_state::is_inferior
;
453 /* If the user hit C-c before, pretend that it was hit right
455 if (check_quit_flag ())
456 target_pass_ctrlc ();
459 /* See target/target.h. */
462 target_terminal::restore_inferior (void)
464 struct ui
*ui
= current_ui
;
466 /* See target_terminal::inferior(). */
467 if (ui
->prompt_state
!= PROMPT_BLOCKED
|| ui
!= main_ui
)
470 /* Restore the terminal settings of inferiors that were in the
471 foreground but are now ours_for_output due to a temporary
472 target_target::ours_for_output() call. */
475 scoped_restore_current_inferior restore_inferior
;
477 for (struct inferior
*inf
: all_inferiors ())
479 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
481 set_current_inferior (inf
);
482 current_top_target ()->terminal_inferior ();
483 inf
->terminal_state
= target_terminal_state::is_inferior
;
488 m_terminal_state
= target_terminal_state::is_inferior
;
490 /* If the user hit C-c before, pretend that it was hit right
492 if (check_quit_flag ())
493 target_pass_ctrlc ();
496 /* Switch terminal state to DESIRED_STATE, either is_ours, or
497 is_ours_for_output. */
500 target_terminal_is_ours_kind (target_terminal_state desired_state
)
502 scoped_restore_current_inferior restore_inferior
;
504 /* Must do this in two passes. First, have all inferiors save the
505 current terminal settings. Then, after all inferiors have add a
506 chance to safely save the terminal settings, restore GDB's
507 terminal settings. */
509 for (inferior
*inf
: all_inferiors ())
511 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
513 set_current_inferior (inf
);
514 current_top_target ()->terminal_save_inferior ();
518 for (inferior
*inf
: all_inferiors ())
520 /* Note we don't check is_inferior here like above because we
521 need to handle 'is_ours_for_output -> is_ours' too. Careful
522 to never transition from 'is_ours' to 'is_ours_for_output',
524 if (inf
->terminal_state
!= target_terminal_state::is_ours
525 && inf
->terminal_state
!= desired_state
)
527 set_current_inferior (inf
);
528 if (desired_state
== target_terminal_state::is_ours
)
529 current_top_target ()->terminal_ours ();
530 else if (desired_state
== target_terminal_state::is_ours_for_output
)
531 current_top_target ()->terminal_ours_for_output ();
533 gdb_assert_not_reached ("unhandled desired state");
534 inf
->terminal_state
= desired_state
;
539 /* See target/target.h. */
542 target_terminal::ours ()
544 struct ui
*ui
= current_ui
;
546 /* See target_terminal::inferior. */
550 if (m_terminal_state
== target_terminal_state::is_ours
)
553 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
554 m_terminal_state
= target_terminal_state::is_ours
;
557 /* See target/target.h. */
560 target_terminal::ours_for_output ()
562 struct ui
*ui
= current_ui
;
564 /* See target_terminal::inferior. */
568 if (!target_terminal::is_inferior ())
571 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
572 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
575 /* See target/target.h. */
578 target_terminal::info (const char *arg
, int from_tty
)
580 current_top_target ()->terminal_info (arg
, from_tty
);
586 target_supports_terminal_ours (void)
588 /* This can be called before there is any target, so we must check
590 target_ops
*top
= current_top_target ();
594 return top
->supports_terminal_ours ();
600 error (_("You can't do that when your target is `%s'"),
601 current_top_target ()->shortname ());
607 error (_("You can't do that without a process to debug."));
611 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
613 printf_unfiltered (_("No saved terminal information.\n"));
616 /* A default implementation for the to_get_ada_task_ptid target method.
618 This function builds the PTID by using both LWP and TID as part of
619 the PTID lwp and tid elements. The pid used is the pid of the
623 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
625 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
628 static enum exec_direction_kind
629 default_execution_direction (struct target_ops
*self
)
631 if (!target_can_execute_reverse
)
633 else if (!target_can_async_p ())
636 gdb_assert_not_reached ("\
637 to_execution_direction must be implemented for reverse async");
643 target_stack::push (target_ops
*t
)
645 /* If there's already a target at this stratum, remove it. */
646 if (m_stack
[t
->to_stratum
] != NULL
)
648 target_ops
*prev
= m_stack
[t
->to_stratum
];
649 m_stack
[t
->to_stratum
] = NULL
;
653 /* Now add the new one. */
654 m_stack
[t
->to_stratum
] = t
;
656 if (m_top
< t
->to_stratum
)
657 m_top
= t
->to_stratum
;
663 push_target (struct target_ops
*t
)
665 g_target_stack
.push (t
);
671 unpush_target (struct target_ops
*t
)
673 return g_target_stack
.unpush (t
);
679 target_stack::unpush (target_ops
*t
)
681 if (t
->to_stratum
== dummy_stratum
)
682 internal_error (__FILE__
, __LINE__
,
683 _("Attempt to unpush the dummy target"));
685 gdb_assert (t
!= NULL
);
687 /* Look for the specified target. Note that a target can only occur
688 once in the target stack. */
690 if (m_stack
[t
->to_stratum
] != t
)
692 /* If T wasn't pushed, quit. Only open targets should be
697 /* Unchain the target. */
698 m_stack
[t
->to_stratum
] = NULL
;
700 if (m_top
== t
->to_stratum
)
701 m_top
= t
->beneath ()->to_stratum
;
703 /* Finally close the target. Note we do this after unchaining, so
704 any target method calls from within the target_close
705 implementation don't end up in T anymore. */
711 /* Unpush TARGET and assert that it worked. */
714 unpush_target_and_assert (struct target_ops
*target
)
716 if (!unpush_target (target
))
718 fprintf_unfiltered (gdb_stderr
,
719 "pop_all_targets couldn't find target %s\n",
720 target
->shortname ());
721 internal_error (__FILE__
, __LINE__
,
722 _("failed internal consistency check"));
727 pop_all_targets_above (enum strata above_stratum
)
729 while ((int) (current_top_target ()->to_stratum
) > (int) above_stratum
)
730 unpush_target_and_assert (current_top_target ());
736 pop_all_targets_at_and_above (enum strata stratum
)
738 while ((int) (current_top_target ()->to_stratum
) >= (int) stratum
)
739 unpush_target_and_assert (current_top_target ());
743 pop_all_targets (void)
745 pop_all_targets_above (dummy_stratum
);
748 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
751 target_is_pushed (struct target_ops
*t
)
753 return g_target_stack
.is_pushed (t
);
756 /* Default implementation of to_get_thread_local_address. */
759 generic_tls_error (void)
761 throw_error (TLS_GENERIC_ERROR
,
762 _("Cannot find thread-local variables on this target"));
765 /* Using the objfile specified in OBJFILE, find the address for the
766 current thread's thread-local storage with offset OFFSET. */
768 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
770 volatile CORE_ADDR addr
= 0;
771 struct target_ops
*target
= current_top_target ();
773 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
775 ptid_t ptid
= inferior_ptid
;
781 /* Fetch the load module address for this objfile. */
782 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
785 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
787 /* If an error occurred, print TLS related messages here. Otherwise,
788 throw the error to some higher catcher. */
789 CATCH (ex
, RETURN_MASK_ALL
)
791 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
795 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
796 error (_("Cannot find thread-local variables "
797 "in this thread library."));
799 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
800 if (objfile_is_library
)
801 error (_("Cannot find shared library `%s' in dynamic"
802 " linker's load module list"), objfile_name (objfile
));
804 error (_("Cannot find executable file `%s' in dynamic"
805 " linker's load module list"), objfile_name (objfile
));
807 case TLS_NOT_ALLOCATED_YET_ERROR
:
808 if (objfile_is_library
)
809 error (_("The inferior has not yet allocated storage for"
810 " thread-local variables in\n"
811 "the shared library `%s'\n"
813 objfile_name (objfile
), target_pid_to_str (ptid
));
815 error (_("The inferior has not yet allocated storage for"
816 " thread-local variables in\n"
817 "the executable `%s'\n"
819 objfile_name (objfile
), target_pid_to_str (ptid
));
821 case TLS_GENERIC_ERROR
:
822 if (objfile_is_library
)
823 error (_("Cannot find thread-local storage for %s, "
824 "shared library %s:\n%s"),
825 target_pid_to_str (ptid
),
826 objfile_name (objfile
), ex
.message
);
828 error (_("Cannot find thread-local storage for %s, "
829 "executable file %s:\n%s"),
830 target_pid_to_str (ptid
),
831 objfile_name (objfile
), ex
.message
);
834 throw_exception (ex
);
840 /* It wouldn't be wrong here to try a gdbarch method, too; finding
841 TLS is an ABI-specific thing. But we don't do that yet. */
843 error (_("Cannot find thread-local variables on this target"));
849 target_xfer_status_to_string (enum target_xfer_status status
)
851 #define CASE(X) case X: return #X
854 CASE(TARGET_XFER_E_IO
);
855 CASE(TARGET_XFER_UNAVAILABLE
);
864 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
866 /* target_read_string -- read a null terminated string, up to LEN bytes,
867 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
868 Set *STRING to a pointer to malloc'd memory containing the data; the caller
869 is responsible for freeing it. Return the number of bytes successfully
873 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
874 int len
, int *errnop
)
880 int buffer_allocated
;
882 unsigned int nbytes_read
= 0;
886 /* Small for testing. */
887 buffer_allocated
= 4;
888 buffer
= (char *) xmalloc (buffer_allocated
);
893 tlen
= MIN (len
, 4 - (memaddr
& 3));
894 offset
= memaddr
& 3;
896 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
899 /* The transfer request might have crossed the boundary to an
900 unallocated region of memory. Retry the transfer, requesting
904 errcode
= target_read_memory (memaddr
, buf
, 1);
909 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
913 bytes
= bufptr
- buffer
;
914 buffer_allocated
*= 2;
915 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
916 bufptr
= buffer
+ bytes
;
919 for (i
= 0; i
< tlen
; i
++)
921 *bufptr
++ = buf
[i
+ offset
];
922 if (buf
[i
+ offset
] == '\000')
924 nbytes_read
+= i
+ 1;
934 string
->reset (buffer
);
940 struct target_section_table
*
941 target_get_section_table (struct target_ops
*target
)
943 return target
->get_section_table ();
946 /* Find a section containing ADDR. */
948 struct target_section
*
949 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
951 struct target_section_table
*table
= target_get_section_table (target
);
952 struct target_section
*secp
;
957 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
959 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
966 /* Helper for the memory xfer routines. Checks the attributes of the
967 memory region of MEMADDR against the read or write being attempted.
968 If the access is permitted returns true, otherwise returns false.
969 REGION_P is an optional output parameter. If not-NULL, it is
970 filled with a pointer to the memory region of MEMADDR. REG_LEN
971 returns LEN trimmed to the end of the region. This is how much the
972 caller can continue requesting, if the access is permitted. A
973 single xfer request must not straddle memory region boundaries. */
976 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
977 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
978 struct mem_region
**region_p
)
980 struct mem_region
*region
;
982 region
= lookup_mem_region (memaddr
);
984 if (region_p
!= NULL
)
987 switch (region
->attrib
.mode
)
990 if (writebuf
!= NULL
)
1000 /* We only support writing to flash during "load" for now. */
1001 if (writebuf
!= NULL
)
1002 error (_("Writing to flash memory forbidden in this context"));
1009 /* region->hi == 0 means there's no upper bound. */
1010 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1013 *reg_len
= region
->hi
- memaddr
;
1018 /* Read memory from more than one valid target. A core file, for
1019 instance, could have some of memory but delegate other bits to
1020 the target below it. So, we must manually try all targets. */
1022 enum target_xfer_status
1023 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1024 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1025 ULONGEST
*xfered_len
)
1027 enum target_xfer_status res
;
1031 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1032 readbuf
, writebuf
, memaddr
, len
,
1034 if (res
== TARGET_XFER_OK
)
1037 /* Stop if the target reports that the memory is not available. */
1038 if (res
== TARGET_XFER_UNAVAILABLE
)
1041 /* We want to continue past core files to executables, but not
1042 past a running target's memory. */
1043 if (ops
->has_all_memory ())
1046 ops
= ops
->beneath ();
1048 while (ops
!= NULL
);
1050 /* The cache works at the raw memory level. Make sure the cache
1051 gets updated with raw contents no matter what kind of memory
1052 object was originally being written. Note we do write-through
1053 first, so that if it fails, we don't write to the cache contents
1054 that never made it to the target. */
1055 if (writebuf
!= NULL
1056 && inferior_ptid
!= null_ptid
1057 && target_dcache_init_p ()
1058 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1060 DCACHE
*dcache
= target_dcache_get ();
1062 /* Note that writing to an area of memory which wasn't present
1063 in the cache doesn't cause it to be loaded in. */
1064 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1070 /* Perform a partial memory transfer.
1071 For docs see target.h, to_xfer_partial. */
1073 static enum target_xfer_status
1074 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1075 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1076 ULONGEST len
, ULONGEST
*xfered_len
)
1078 enum target_xfer_status res
;
1080 struct mem_region
*region
;
1081 struct inferior
*inf
;
1083 /* For accesses to unmapped overlay sections, read directly from
1084 files. Must do this first, as MEMADDR may need adjustment. */
1085 if (readbuf
!= NULL
&& overlay_debugging
)
1087 struct obj_section
*section
= find_pc_overlay (memaddr
);
1089 if (pc_in_unmapped_range (memaddr
, section
))
1091 struct target_section_table
*table
1092 = target_get_section_table (ops
);
1093 const char *section_name
= section
->the_bfd_section
->name
;
1095 memaddr
= overlay_mapped_address (memaddr
, section
);
1096 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1097 memaddr
, len
, xfered_len
,
1099 table
->sections_end
,
1104 /* Try the executable files, if "trust-readonly-sections" is set. */
1105 if (readbuf
!= NULL
&& trust_readonly
)
1107 struct target_section
*secp
;
1108 struct target_section_table
*table
;
1110 secp
= target_section_by_addr (ops
, memaddr
);
1112 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1113 secp
->the_bfd_section
)
1116 table
= target_get_section_table (ops
);
1117 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1118 memaddr
, len
, xfered_len
,
1120 table
->sections_end
,
1125 /* Try GDB's internal data cache. */
1127 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1129 return TARGET_XFER_E_IO
;
1131 if (inferior_ptid
!= null_ptid
)
1132 inf
= current_inferior ();
1138 /* The dcache reads whole cache lines; that doesn't play well
1139 with reading from a trace buffer, because reading outside of
1140 the collected memory range fails. */
1141 && get_traceframe_number () == -1
1142 && (region
->attrib
.cache
1143 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1144 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1146 DCACHE
*dcache
= target_dcache_get_or_init ();
1148 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1149 reg_len
, xfered_len
);
1152 /* If none of those methods found the memory we wanted, fall back
1153 to a target partial transfer. Normally a single call to
1154 to_xfer_partial is enough; if it doesn't recognize an object
1155 it will call the to_xfer_partial of the next target down.
1156 But for memory this won't do. Memory is the only target
1157 object which can be read from more than one valid target.
1158 A core file, for instance, could have some of memory but
1159 delegate other bits to the target below it. So, we must
1160 manually try all targets. */
1162 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1165 /* If we still haven't got anything, return the last error. We
1170 /* Perform a partial memory transfer. For docs see target.h,
1173 static enum target_xfer_status
1174 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1175 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1176 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1178 enum target_xfer_status res
;
1180 /* Zero length requests are ok and require no work. */
1182 return TARGET_XFER_EOF
;
1184 memaddr
= address_significant (target_gdbarch (), memaddr
);
1186 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1187 breakpoint insns, thus hiding out from higher layers whether
1188 there are software breakpoints inserted in the code stream. */
1189 if (readbuf
!= NULL
)
1191 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1194 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1195 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1199 /* A large write request is likely to be partially satisfied
1200 by memory_xfer_partial_1. We will continually malloc
1201 and free a copy of the entire write request for breakpoint
1202 shadow handling even though we only end up writing a small
1203 subset of it. Cap writes to a limit specified by the target
1204 to mitigate this. */
1205 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1207 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1208 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1209 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1216 scoped_restore_tmpl
<int>
1217 make_scoped_restore_show_memory_breakpoints (int show
)
1219 return make_scoped_restore (&show_memory_breakpoints
, show
);
1222 /* For docs see target.h, to_xfer_partial. */
1224 enum target_xfer_status
1225 target_xfer_partial (struct target_ops
*ops
,
1226 enum target_object object
, const char *annex
,
1227 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1228 ULONGEST offset
, ULONGEST len
,
1229 ULONGEST
*xfered_len
)
1231 enum target_xfer_status retval
;
1233 /* Transfer is done when LEN is zero. */
1235 return TARGET_XFER_EOF
;
1237 if (writebuf
&& !may_write_memory
)
1238 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1239 core_addr_to_string_nz (offset
), plongest (len
));
1243 /* If this is a memory transfer, let the memory-specific code
1244 have a look at it instead. Memory transfers are more
1246 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1247 || object
== TARGET_OBJECT_CODE_MEMORY
)
1248 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1249 writebuf
, offset
, len
, xfered_len
);
1250 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1252 /* Skip/avoid accessing the target if the memory region
1253 attributes block the access. Check this here instead of in
1254 raw_memory_xfer_partial as otherwise we'd end up checking
1255 this twice in the case of the memory_xfer_partial path is
1256 taken; once before checking the dcache, and another in the
1257 tail call to raw_memory_xfer_partial. */
1258 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1260 return TARGET_XFER_E_IO
;
1262 /* Request the normal memory object from other layers. */
1263 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1267 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1268 writebuf
, offset
, len
, xfered_len
);
1272 const unsigned char *myaddr
= NULL
;
1274 fprintf_unfiltered (gdb_stdlog
,
1275 "%s:target_xfer_partial "
1276 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1279 (annex
? annex
: "(null)"),
1280 host_address_to_string (readbuf
),
1281 host_address_to_string (writebuf
),
1282 core_addr_to_string_nz (offset
),
1283 pulongest (len
), retval
,
1284 pulongest (*xfered_len
));
1290 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1294 fputs_unfiltered (", bytes =", gdb_stdlog
);
1295 for (i
= 0; i
< *xfered_len
; i
++)
1297 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1299 if (targetdebug
< 2 && i
> 0)
1301 fprintf_unfiltered (gdb_stdlog
, " ...");
1304 fprintf_unfiltered (gdb_stdlog
, "\n");
1307 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1311 fputc_unfiltered ('\n', gdb_stdlog
);
1314 /* Check implementations of to_xfer_partial update *XFERED_LEN
1315 properly. Do assertion after printing debug messages, so that we
1316 can find more clues on assertion failure from debugging messages. */
1317 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1318 gdb_assert (*xfered_len
> 0);
1323 /* Read LEN bytes of target memory at address MEMADDR, placing the
1324 results in GDB's memory at MYADDR. Returns either 0 for success or
1325 -1 if any error occurs.
1327 If an error occurs, no guarantee is made about the contents of the data at
1328 MYADDR. In particular, the caller should not depend upon partial reads
1329 filling the buffer with good data. There is no way for the caller to know
1330 how much good data might have been transfered anyway. Callers that can
1331 deal with partial reads should call target_read (which will retry until
1332 it makes no progress, and then return how much was transferred). */
1335 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1337 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1338 myaddr
, memaddr
, len
) == len
)
1344 /* See target/target.h. */
1347 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1352 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1355 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1356 gdbarch_byte_order (target_gdbarch ()));
1360 /* Like target_read_memory, but specify explicitly that this is a read
1361 from the target's raw memory. That is, this read bypasses the
1362 dcache, breakpoint shadowing, etc. */
1365 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1367 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1368 myaddr
, memaddr
, len
) == len
)
1374 /* Like target_read_memory, but specify explicitly that this is a read from
1375 the target's stack. This may trigger different cache behavior. */
1378 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1380 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1381 myaddr
, memaddr
, len
) == len
)
1387 /* Like target_read_memory, but specify explicitly that this is a read from
1388 the target's code. This may trigger different cache behavior. */
1391 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1393 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1394 myaddr
, memaddr
, len
) == len
)
1400 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1401 Returns either 0 for success or -1 if any error occurs. If an
1402 error occurs, no guarantee is made about how much data got written.
1403 Callers that can deal with partial writes should call
1407 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1409 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1410 myaddr
, memaddr
, len
) == len
)
1416 /* Write LEN bytes from MYADDR to target raw memory at address
1417 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1418 If an error occurs, no guarantee is made about how much data got
1419 written. Callers that can deal with partial writes should call
1423 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1425 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1426 myaddr
, memaddr
, len
) == len
)
1432 /* Fetch the target's memory map. */
1434 std::vector
<mem_region
>
1435 target_memory_map (void)
1437 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1438 if (result
.empty ())
1441 std::sort (result
.begin (), result
.end ());
1443 /* Check that regions do not overlap. Simultaneously assign
1444 a numbering for the "mem" commands to use to refer to
1446 mem_region
*last_one
= NULL
;
1447 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1449 mem_region
*this_one
= &result
[ix
];
1450 this_one
->number
= ix
;
1452 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1454 warning (_("Overlapping regions in memory map: ignoring"));
1455 return std::vector
<mem_region
> ();
1458 last_one
= this_one
;
1465 target_flash_erase (ULONGEST address
, LONGEST length
)
1467 current_top_target ()->flash_erase (address
, length
);
1471 target_flash_done (void)
1473 current_top_target ()->flash_done ();
1477 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1478 struct cmd_list_element
*c
, const char *value
)
1480 fprintf_filtered (file
,
1481 _("Mode for reading from readonly sections is %s.\n"),
1485 /* Target vector read/write partial wrapper functions. */
1487 static enum target_xfer_status
1488 target_read_partial (struct target_ops
*ops
,
1489 enum target_object object
,
1490 const char *annex
, gdb_byte
*buf
,
1491 ULONGEST offset
, ULONGEST len
,
1492 ULONGEST
*xfered_len
)
1494 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1498 static enum target_xfer_status
1499 target_write_partial (struct target_ops
*ops
,
1500 enum target_object object
,
1501 const char *annex
, const gdb_byte
*buf
,
1502 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1504 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1508 /* Wrappers to perform the full transfer. */
1510 /* For docs on target_read see target.h. */
1513 target_read (struct target_ops
*ops
,
1514 enum target_object object
,
1515 const char *annex
, gdb_byte
*buf
,
1516 ULONGEST offset
, LONGEST len
)
1518 LONGEST xfered_total
= 0;
1521 /* If we are reading from a memory object, find the length of an addressable
1522 unit for that architecture. */
1523 if (object
== TARGET_OBJECT_MEMORY
1524 || object
== TARGET_OBJECT_STACK_MEMORY
1525 || object
== TARGET_OBJECT_CODE_MEMORY
1526 || object
== TARGET_OBJECT_RAW_MEMORY
)
1527 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1529 while (xfered_total
< len
)
1531 ULONGEST xfered_partial
;
1532 enum target_xfer_status status
;
1534 status
= target_read_partial (ops
, object
, annex
,
1535 buf
+ xfered_total
* unit_size
,
1536 offset
+ xfered_total
, len
- xfered_total
,
1539 /* Call an observer, notifying them of the xfer progress? */
1540 if (status
== TARGET_XFER_EOF
)
1541 return xfered_total
;
1542 else if (status
== TARGET_XFER_OK
)
1544 xfered_total
+= xfered_partial
;
1548 return TARGET_XFER_E_IO
;
1554 /* Assuming that the entire [begin, end) range of memory cannot be
1555 read, try to read whatever subrange is possible to read.
1557 The function returns, in RESULT, either zero or one memory block.
1558 If there's a readable subrange at the beginning, it is completely
1559 read and returned. Any further readable subrange will not be read.
1560 Otherwise, if there's a readable subrange at the end, it will be
1561 completely read and returned. Any readable subranges before it
1562 (obviously, not starting at the beginning), will be ignored. In
1563 other cases -- either no readable subrange, or readable subrange(s)
1564 that is neither at the beginning, or end, nothing is returned.
1566 The purpose of this function is to handle a read across a boundary
1567 of accessible memory in a case when memory map is not available.
1568 The above restrictions are fine for this case, but will give
1569 incorrect results if the memory is 'patchy'. However, supporting
1570 'patchy' memory would require trying to read every single byte,
1571 and it seems unacceptable solution. Explicit memory map is
1572 recommended for this case -- and target_read_memory_robust will
1573 take care of reading multiple ranges then. */
1576 read_whatever_is_readable (struct target_ops
*ops
,
1577 const ULONGEST begin
, const ULONGEST end
,
1579 std::vector
<memory_read_result
> *result
)
1581 ULONGEST current_begin
= begin
;
1582 ULONGEST current_end
= end
;
1584 ULONGEST xfered_len
;
1586 /* If we previously failed to read 1 byte, nothing can be done here. */
1587 if (end
- begin
<= 1)
1590 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1592 /* Check that either first or the last byte is readable, and give up
1593 if not. This heuristic is meant to permit reading accessible memory
1594 at the boundary of accessible region. */
1595 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1596 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1601 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1602 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1603 &xfered_len
) == TARGET_XFER_OK
)
1611 /* Loop invariant is that the [current_begin, current_end) was previously
1612 found to be not readable as a whole.
1614 Note loop condition -- if the range has 1 byte, we can't divide the range
1615 so there's no point trying further. */
1616 while (current_end
- current_begin
> 1)
1618 ULONGEST first_half_begin
, first_half_end
;
1619 ULONGEST second_half_begin
, second_half_end
;
1621 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1625 first_half_begin
= current_begin
;
1626 first_half_end
= middle
;
1627 second_half_begin
= middle
;
1628 second_half_end
= current_end
;
1632 first_half_begin
= middle
;
1633 first_half_end
= current_end
;
1634 second_half_begin
= current_begin
;
1635 second_half_end
= middle
;
1638 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1639 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1641 first_half_end
- first_half_begin
);
1643 if (xfer
== first_half_end
- first_half_begin
)
1645 /* This half reads up fine. So, the error must be in the
1647 current_begin
= second_half_begin
;
1648 current_end
= second_half_end
;
1652 /* This half is not readable. Because we've tried one byte, we
1653 know some part of this half if actually readable. Go to the next
1654 iteration to divide again and try to read.
1656 We don't handle the other half, because this function only tries
1657 to read a single readable subrange. */
1658 current_begin
= first_half_begin
;
1659 current_end
= first_half_end
;
1665 /* The [begin, current_begin) range has been read. */
1666 result
->emplace_back (begin
, current_end
, std::move (buf
));
1670 /* The [current_end, end) range has been read. */
1671 LONGEST region_len
= end
- current_end
;
1673 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1674 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1675 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1676 region_len
* unit_size
);
1677 result
->emplace_back (current_end
, end
, std::move (data
));
1681 std::vector
<memory_read_result
>
1682 read_memory_robust (struct target_ops
*ops
,
1683 const ULONGEST offset
, const LONGEST len
)
1685 std::vector
<memory_read_result
> result
;
1686 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1688 LONGEST xfered_total
= 0;
1689 while (xfered_total
< len
)
1691 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1694 /* If there is no explicit region, a fake one should be created. */
1695 gdb_assert (region
);
1697 if (region
->hi
== 0)
1698 region_len
= len
- xfered_total
;
1700 region_len
= region
->hi
- offset
;
1702 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1704 /* Cannot read this region. Note that we can end up here only
1705 if the region is explicitly marked inaccessible, or
1706 'inaccessible-by-default' is in effect. */
1707 xfered_total
+= region_len
;
1711 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1712 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1713 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1715 LONGEST xfered_partial
=
1716 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1717 offset
+ xfered_total
, to_read
);
1718 /* Call an observer, notifying them of the xfer progress? */
1719 if (xfered_partial
<= 0)
1721 /* Got an error reading full chunk. See if maybe we can read
1723 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1724 offset
+ xfered_total
+ to_read
,
1725 unit_size
, &result
);
1726 xfered_total
+= to_read
;
1730 result
.emplace_back (offset
+ xfered_total
,
1731 offset
+ xfered_total
+ xfered_partial
,
1732 std::move (buffer
));
1733 xfered_total
+= xfered_partial
;
1743 /* An alternative to target_write with progress callbacks. */
1746 target_write_with_progress (struct target_ops
*ops
,
1747 enum target_object object
,
1748 const char *annex
, const gdb_byte
*buf
,
1749 ULONGEST offset
, LONGEST len
,
1750 void (*progress
) (ULONGEST
, void *), void *baton
)
1752 LONGEST xfered_total
= 0;
1755 /* If we are writing to a memory object, find the length of an addressable
1756 unit for that architecture. */
1757 if (object
== TARGET_OBJECT_MEMORY
1758 || object
== TARGET_OBJECT_STACK_MEMORY
1759 || object
== TARGET_OBJECT_CODE_MEMORY
1760 || object
== TARGET_OBJECT_RAW_MEMORY
)
1761 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1763 /* Give the progress callback a chance to set up. */
1765 (*progress
) (0, baton
);
1767 while (xfered_total
< len
)
1769 ULONGEST xfered_partial
;
1770 enum target_xfer_status status
;
1772 status
= target_write_partial (ops
, object
, annex
,
1773 buf
+ xfered_total
* unit_size
,
1774 offset
+ xfered_total
, len
- xfered_total
,
1777 if (status
!= TARGET_XFER_OK
)
1778 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1781 (*progress
) (xfered_partial
, baton
);
1783 xfered_total
+= xfered_partial
;
1789 /* For docs on target_write see target.h. */
1792 target_write (struct target_ops
*ops
,
1793 enum target_object object
,
1794 const char *annex
, const gdb_byte
*buf
,
1795 ULONGEST offset
, LONGEST len
)
1797 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1801 /* Help for target_read_alloc and target_read_stralloc. See their comments
1804 template <typename T
>
1805 gdb::optional
<gdb::def_vector
<T
>>
1806 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1809 gdb::def_vector
<T
> buf
;
1811 const int chunk
= 4096;
1813 /* This function does not have a length parameter; it reads the
1814 entire OBJECT). Also, it doesn't support objects fetched partly
1815 from one target and partly from another (in a different stratum,
1816 e.g. a core file and an executable). Both reasons make it
1817 unsuitable for reading memory. */
1818 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1820 /* Start by reading up to 4K at a time. The target will throttle
1821 this number down if necessary. */
1824 ULONGEST xfered_len
;
1825 enum target_xfer_status status
;
1827 buf
.resize (buf_pos
+ chunk
);
1829 status
= target_read_partial (ops
, object
, annex
,
1830 (gdb_byte
*) &buf
[buf_pos
],
1834 if (status
== TARGET_XFER_EOF
)
1836 /* Read all there was. */
1837 buf
.resize (buf_pos
);
1840 else if (status
!= TARGET_XFER_OK
)
1842 /* An error occurred. */
1846 buf_pos
+= xfered_len
;
1854 gdb::optional
<gdb::byte_vector
>
1855 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1858 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1863 gdb::optional
<gdb::char_vector
>
1864 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1867 gdb::optional
<gdb::char_vector
> buf
1868 = target_read_alloc_1
<char> (ops
, object
, annex
);
1873 if (buf
->back () != '\0')
1874 buf
->push_back ('\0');
1876 /* Check for embedded NUL bytes; but allow trailing NULs. */
1877 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1878 it
!= buf
->end (); it
++)
1881 warning (_("target object %d, annex %s, "
1882 "contained unexpected null characters"),
1883 (int) object
, annex
? annex
: "(none)");
1890 /* Memory transfer methods. */
1893 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1896 /* This method is used to read from an alternate, non-current
1897 target. This read must bypass the overlay support (as symbols
1898 don't match this target), and GDB's internal cache (wrong cache
1899 for this target). */
1900 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1902 memory_error (TARGET_XFER_E_IO
, addr
);
1906 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1907 int len
, enum bfd_endian byte_order
)
1909 gdb_byte buf
[sizeof (ULONGEST
)];
1911 gdb_assert (len
<= sizeof (buf
));
1912 get_target_memory (ops
, addr
, buf
, len
);
1913 return extract_unsigned_integer (buf
, len
, byte_order
);
1919 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1920 struct bp_target_info
*bp_tgt
)
1922 if (!may_insert_breakpoints
)
1924 warning (_("May not insert breakpoints"));
1928 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1934 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1935 struct bp_target_info
*bp_tgt
,
1936 enum remove_bp_reason reason
)
1938 /* This is kind of a weird case to handle, but the permission might
1939 have been changed after breakpoints were inserted - in which case
1940 we should just take the user literally and assume that any
1941 breakpoints should be left in place. */
1942 if (!may_insert_breakpoints
)
1944 warning (_("May not remove breakpoints"));
1948 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1952 info_target_command (const char *args
, int from_tty
)
1954 int has_all_mem
= 0;
1956 if (symfile_objfile
!= NULL
)
1957 printf_unfiltered (_("Symbols from \"%s\".\n"),
1958 objfile_name (symfile_objfile
));
1960 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1962 if (!t
->has_memory ())
1965 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1968 printf_unfiltered (_("\tWhile running this, "
1969 "GDB does not access memory from...\n"));
1970 printf_unfiltered ("%s:\n", t
->longname ());
1972 has_all_mem
= t
->has_all_memory ();
1976 /* This function is called before any new inferior is created, e.g.
1977 by running a program, attaching, or connecting to a target.
1978 It cleans up any state from previous invocations which might
1979 change between runs. This is a subset of what target_preopen
1980 resets (things which might change between targets). */
1983 target_pre_inferior (int from_tty
)
1985 /* Clear out solib state. Otherwise the solib state of the previous
1986 inferior might have survived and is entirely wrong for the new
1987 target. This has been observed on GNU/Linux using glibc 2.3. How
1999 Cannot access memory at address 0xdeadbeef
2002 /* In some OSs, the shared library list is the same/global/shared
2003 across inferiors. If code is shared between processes, so are
2004 memory regions and features. */
2005 if (!gdbarch_has_global_solist (target_gdbarch ()))
2007 no_shared_libraries (NULL
, from_tty
);
2009 invalidate_target_mem_regions ();
2011 target_clear_description ();
2014 /* attach_flag may be set if the previous process associated with
2015 the inferior was attached to. */
2016 current_inferior ()->attach_flag
= 0;
2018 current_inferior ()->highest_thread_num
= 0;
2020 agent_capability_invalidate ();
2023 /* Callback for iterate_over_inferiors. Gets rid of the given
2027 dispose_inferior (struct inferior
*inf
, void *args
)
2029 /* Not all killed inferiors can, or will ever be, removed from the
2030 inferior list. Killed inferiors clearly don't need to be killed
2031 again, so, we're done. */
2035 thread_info
*thread
= any_thread_of_inferior (inf
);
2038 switch_to_thread (thread
);
2040 /* Core inferiors actually should be detached, not killed. */
2041 if (target_has_execution
)
2044 target_detach (inf
, 0);
2050 /* This is to be called by the open routine before it does
2054 target_preopen (int from_tty
)
2058 if (have_inferiors ())
2061 || !have_live_inferiors ()
2062 || query (_("A program is being debugged already. Kill it? ")))
2063 iterate_over_inferiors (dispose_inferior
, NULL
);
2065 error (_("Program not killed."));
2068 /* Calling target_kill may remove the target from the stack. But if
2069 it doesn't (which seems like a win for UDI), remove it now. */
2070 /* Leave the exec target, though. The user may be switching from a
2071 live process to a core of the same program. */
2072 pop_all_targets_above (file_stratum
);
2074 target_pre_inferior (from_tty
);
2080 target_detach (inferior
*inf
, int from_tty
)
2082 /* As long as some to_detach implementations rely on the current_inferior
2083 (either directly, or indirectly, like through target_gdbarch or by
2084 reading memory), INF needs to be the current inferior. When that
2085 requirement will become no longer true, then we can remove this
2087 gdb_assert (inf
== current_inferior ());
2089 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2090 /* Don't remove global breakpoints here. They're removed on
2091 disconnection from the target. */
2094 /* If we're in breakpoints-always-inserted mode, have to remove
2095 breakpoints before detaching. */
2096 remove_breakpoints_inf (current_inferior ());
2098 prepare_for_detach ();
2100 current_top_target ()->detach (inf
, from_tty
);
2104 target_disconnect (const char *args
, int from_tty
)
2106 /* If we're in breakpoints-always-inserted mode or if breakpoints
2107 are global across processes, we have to remove them before
2109 remove_breakpoints ();
2111 current_top_target ()->disconnect (args
, from_tty
);
2114 /* See target/target.h. */
2117 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2119 return current_top_target ()->wait (ptid
, status
, options
);
2125 default_target_wait (struct target_ops
*ops
,
2126 ptid_t ptid
, struct target_waitstatus
*status
,
2129 status
->kind
= TARGET_WAITKIND_IGNORE
;
2130 return minus_one_ptid
;
2134 target_pid_to_str (ptid_t ptid
)
2136 return current_top_target ()->pid_to_str (ptid
);
2140 target_thread_name (struct thread_info
*info
)
2142 return current_top_target ()->thread_name (info
);
2145 struct thread_info
*
2146 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2148 struct inferior
*inf
)
2150 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2155 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2157 target_dcache_invalidate ();
2159 current_top_target ()->resume (ptid
, step
, signal
);
2161 registers_changed_ptid (ptid
);
2162 /* We only set the internal executing state here. The user/frontend
2163 running state is set at a higher level. This also clears the
2164 thread's stop_pc as side effect. */
2165 set_executing (ptid
, 1);
2166 clear_inline_frame_state (ptid
);
2169 /* If true, target_commit_resume is a nop. */
2170 static int defer_target_commit_resume
;
2175 target_commit_resume (void)
2177 if (defer_target_commit_resume
)
2180 current_top_target ()->commit_resume ();
2185 scoped_restore_tmpl
<int>
2186 make_scoped_defer_target_commit_resume ()
2188 return make_scoped_restore (&defer_target_commit_resume
, 1);
2192 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2194 current_top_target ()->pass_signals (numsigs
, pass_signals
);
2198 target_program_signals (int numsigs
, unsigned char *program_signals
)
2200 current_top_target ()->program_signals (numsigs
, program_signals
);
2204 default_follow_fork (struct target_ops
*self
, int follow_child
,
2207 /* Some target returned a fork event, but did not know how to follow it. */
2208 internal_error (__FILE__
, __LINE__
,
2209 _("could not find a target to follow fork"));
2212 /* Look through the list of possible targets for a target that can
2216 target_follow_fork (int follow_child
, int detach_fork
)
2218 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2221 /* Target wrapper for follow exec hook. */
2224 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2226 current_top_target ()->follow_exec (inf
, execd_pathname
);
2230 default_mourn_inferior (struct target_ops
*self
)
2232 internal_error (__FILE__
, __LINE__
,
2233 _("could not find a target to follow mourn inferior"));
2237 target_mourn_inferior (ptid_t ptid
)
2239 gdb_assert (ptid
== inferior_ptid
);
2240 current_top_target ()->mourn_inferior ();
2242 /* We no longer need to keep handles on any of the object files.
2243 Make sure to release them to avoid unnecessarily locking any
2244 of them while we're not actually debugging. */
2245 bfd_cache_close_all ();
2248 /* Look for a target which can describe architectural features, starting
2249 from TARGET. If we find one, return its description. */
2251 const struct target_desc
*
2252 target_read_description (struct target_ops
*target
)
2254 return target
->read_description ();
2257 /* This implements a basic search of memory, reading target memory and
2258 performing the search here (as opposed to performing the search in on the
2259 target side with, for example, gdbserver). */
2262 simple_search_memory (struct target_ops
*ops
,
2263 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2264 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2265 CORE_ADDR
*found_addrp
)
2267 /* NOTE: also defined in find.c testcase. */
2268 #define SEARCH_CHUNK_SIZE 16000
2269 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2270 /* Buffer to hold memory contents for searching. */
2271 unsigned search_buf_size
;
2273 search_buf_size
= chunk_size
+ pattern_len
- 1;
2275 /* No point in trying to allocate a buffer larger than the search space. */
2276 if (search_space_len
< search_buf_size
)
2277 search_buf_size
= search_space_len
;
2279 gdb::byte_vector
search_buf (search_buf_size
);
2281 /* Prime the search buffer. */
2283 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2284 search_buf
.data (), start_addr
, search_buf_size
)
2287 warning (_("Unable to access %s bytes of target "
2288 "memory at %s, halting search."),
2289 pulongest (search_buf_size
), hex_string (start_addr
));
2293 /* Perform the search.
2295 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2296 When we've scanned N bytes we copy the trailing bytes to the start and
2297 read in another N bytes. */
2299 while (search_space_len
>= pattern_len
)
2301 gdb_byte
*found_ptr
;
2302 unsigned nr_search_bytes
2303 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2305 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2306 pattern
, pattern_len
);
2308 if (found_ptr
!= NULL
)
2310 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2312 *found_addrp
= found_addr
;
2316 /* Not found in this chunk, skip to next chunk. */
2318 /* Don't let search_space_len wrap here, it's unsigned. */
2319 if (search_space_len
>= chunk_size
)
2320 search_space_len
-= chunk_size
;
2322 search_space_len
= 0;
2324 if (search_space_len
>= pattern_len
)
2326 unsigned keep_len
= search_buf_size
- chunk_size
;
2327 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2330 /* Copy the trailing part of the previous iteration to the front
2331 of the buffer for the next iteration. */
2332 gdb_assert (keep_len
== pattern_len
- 1);
2333 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2335 nr_to_read
= std::min (search_space_len
- keep_len
,
2336 (ULONGEST
) chunk_size
);
2338 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2339 &search_buf
[keep_len
], read_addr
,
2340 nr_to_read
) != nr_to_read
)
2342 warning (_("Unable to access %s bytes of target "
2343 "memory at %s, halting search."),
2344 plongest (nr_to_read
),
2345 hex_string (read_addr
));
2349 start_addr
+= chunk_size
;
2358 /* Default implementation of memory-searching. */
2361 default_search_memory (struct target_ops
*self
,
2362 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2363 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2364 CORE_ADDR
*found_addrp
)
2366 /* Start over from the top of the target stack. */
2367 return simple_search_memory (current_top_target (),
2368 start_addr
, search_space_len
,
2369 pattern
, pattern_len
, found_addrp
);
2372 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2373 sequence of bytes in PATTERN with length PATTERN_LEN.
2375 The result is 1 if found, 0 if not found, and -1 if there was an error
2376 requiring halting of the search (e.g. memory read error).
2377 If the pattern is found the address is recorded in FOUND_ADDRP. */
2380 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2381 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2382 CORE_ADDR
*found_addrp
)
2384 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2385 pattern
, pattern_len
, found_addrp
);
2388 /* Look through the currently pushed targets. If none of them will
2389 be able to restart the currently running process, issue an error
2393 target_require_runnable (void)
2395 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2397 /* If this target knows how to create a new program, then
2398 assume we will still be able to after killing the current
2399 one. Either killing and mourning will not pop T, or else
2400 find_default_run_target will find it again. */
2401 if (t
->can_create_inferior ())
2404 /* Do not worry about targets at certain strata that can not
2405 create inferiors. Assume they will be pushed again if
2406 necessary, and continue to the process_stratum. */
2407 if (t
->to_stratum
> process_stratum
)
2410 error (_("The \"%s\" target does not support \"run\". "
2411 "Try \"help target\" or \"continue\"."),
2415 /* This function is only called if the target is running. In that
2416 case there should have been a process_stratum target and it
2417 should either know how to create inferiors, or not... */
2418 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2421 /* Whether GDB is allowed to fall back to the default run target for
2422 "run", "attach", etc. when no target is connected yet. */
2423 static int auto_connect_native_target
= 1;
2426 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2427 struct cmd_list_element
*c
, const char *value
)
2429 fprintf_filtered (file
,
2430 _("Whether GDB may automatically connect to the "
2431 "native target is %s.\n"),
2435 /* A pointer to the target that can respond to "run" or "attach".
2436 Native targets are always singletons and instantiated early at GDB
2438 static target_ops
*the_native_target
;
2443 set_native_target (target_ops
*target
)
2445 if (the_native_target
!= NULL
)
2446 internal_error (__FILE__
, __LINE__
,
2447 _("native target already set (\"%s\")."),
2448 the_native_target
->longname ());
2450 the_native_target
= target
;
2456 get_native_target ()
2458 return the_native_target
;
2461 /* Look through the list of possible targets for a target that can
2462 execute a run or attach command without any other data. This is
2463 used to locate the default process stratum.
2465 If DO_MESG is not NULL, the result is always valid (error() is
2466 called for errors); else, return NULL on error. */
2468 static struct target_ops
*
2469 find_default_run_target (const char *do_mesg
)
2471 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2472 return the_native_target
;
2474 if (do_mesg
!= NULL
)
2475 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2482 find_attach_target (void)
2484 /* If a target on the current stack can attach, use it. */
2485 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2487 if (t
->can_attach ())
2491 /* Otherwise, use the default run target for attaching. */
2492 return find_default_run_target ("attach");
2498 find_run_target (void)
2500 /* If a target on the current stack can run, use it. */
2501 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2503 if (t
->can_create_inferior ())
2507 /* Otherwise, use the default run target. */
2508 return find_default_run_target ("run");
2512 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2517 /* Implement the "info proc" command. */
2520 target_info_proc (const char *args
, enum info_proc_what what
)
2522 struct target_ops
*t
;
2524 /* If we're already connected to something that can get us OS
2525 related data, use it. Otherwise, try using the native
2527 t
= find_target_at (process_stratum
);
2529 t
= find_default_run_target (NULL
);
2531 for (; t
!= NULL
; t
= t
->beneath ())
2533 if (t
->info_proc (args
, what
))
2536 fprintf_unfiltered (gdb_stdlog
,
2537 "target_info_proc (\"%s\", %d)\n", args
, what
);
2547 find_default_supports_disable_randomization (struct target_ops
*self
)
2549 struct target_ops
*t
;
2551 t
= find_default_run_target (NULL
);
2553 return t
->supports_disable_randomization ();
2558 target_supports_disable_randomization (void)
2560 return current_top_target ()->supports_disable_randomization ();
2563 /* See target/target.h. */
2566 target_supports_multi_process (void)
2568 return current_top_target ()->supports_multi_process ();
2573 gdb::optional
<gdb::char_vector
>
2574 target_get_osdata (const char *type
)
2576 struct target_ops
*t
;
2578 /* If we're already connected to something that can get us OS
2579 related data, use it. Otherwise, try using the native
2581 t
= find_target_at (process_stratum
);
2583 t
= find_default_run_target ("get OS data");
2588 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2591 static struct address_space
*
2592 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2594 struct inferior
*inf
;
2596 /* Fall-back to the "main" address space of the inferior. */
2597 inf
= find_inferior_ptid (ptid
);
2599 if (inf
== NULL
|| inf
->aspace
== NULL
)
2600 internal_error (__FILE__
, __LINE__
,
2601 _("Can't determine the current "
2602 "address space of thread %s\n"),
2603 target_pid_to_str (ptid
));
2608 /* Determine the current address space of thread PTID. */
2610 struct address_space
*
2611 target_thread_address_space (ptid_t ptid
)
2613 struct address_space
*aspace
;
2615 aspace
= current_top_target ()->thread_address_space (ptid
);
2616 gdb_assert (aspace
!= NULL
);
2624 target_ops::beneath () const
2626 return g_target_stack
.find_beneath (this);
2630 target_ops::close ()
2635 target_ops::can_attach ()
2641 target_ops::attach (const char *, int)
2643 gdb_assert_not_reached ("target_ops::attach called");
2647 target_ops::can_create_inferior ()
2653 target_ops::create_inferior (const char *, const std::string
&,
2656 gdb_assert_not_reached ("target_ops::create_inferior called");
2660 target_ops::can_run ()
2668 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2677 /* Target file operations. */
2679 static struct target_ops
*
2680 default_fileio_target (void)
2682 struct target_ops
*t
;
2684 /* If we're already connected to something that can perform
2685 file I/O, use it. Otherwise, try using the native target. */
2686 t
= find_target_at (process_stratum
);
2689 return find_default_run_target ("file I/O");
2692 /* File handle for target file operations. */
2696 /* The target on which this file is open. NULL if the target is
2697 meanwhile closed while the handle is open. */
2700 /* The file descriptor on the target. */
2703 /* Check whether this fileio_fh_t represents a closed file. */
2706 return target_fd
< 0;
2710 /* Vector of currently open file handles. The value returned by
2711 target_fileio_open and passed as the FD argument to other
2712 target_fileio_* functions is an index into this vector. This
2713 vector's entries are never freed; instead, files are marked as
2714 closed, and the handle becomes available for reuse. */
2715 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2717 /* Index into fileio_fhandles of the lowest handle that might be
2718 closed. This permits handle reuse without searching the whole
2719 list each time a new file is opened. */
2720 static int lowest_closed_fd
;
2722 /* Invalidate the target associated with open handles that were open
2723 on target TARG, since we're about to close (and maybe destroy) the
2724 target. The handles remain open from the client's perspective, but
2725 trying to do anything with them other than closing them will fail
2729 fileio_handles_invalidate_target (target_ops
*targ
)
2731 for (fileio_fh_t
&fh
: fileio_fhandles
)
2732 if (fh
.target
== targ
)
2736 /* Acquire a target fileio file descriptor. */
2739 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2741 /* Search for closed handles to reuse. */
2742 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2744 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2746 if (fh
.is_closed ())
2750 /* Push a new handle if no closed handles were found. */
2751 if (lowest_closed_fd
== fileio_fhandles
.size ())
2752 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2754 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2756 /* Should no longer be marked closed. */
2757 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2759 /* Return its index, and start the next lookup at
2761 return lowest_closed_fd
++;
2764 /* Release a target fileio file descriptor. */
2767 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2770 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2773 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2775 static fileio_fh_t
*
2776 fileio_fd_to_fh (int fd
)
2778 return &fileio_fhandles
[fd
];
2782 /* Default implementations of file i/o methods. We don't want these
2783 to delegate automatically, because we need to know which target
2784 supported the method, in order to call it directly from within
2785 pread/pwrite, etc. */
2788 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2789 int flags
, int mode
, int warn_if_slow
,
2792 *target_errno
= FILEIO_ENOSYS
;
2797 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2798 ULONGEST offset
, int *target_errno
)
2800 *target_errno
= FILEIO_ENOSYS
;
2805 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2806 ULONGEST offset
, int *target_errno
)
2808 *target_errno
= FILEIO_ENOSYS
;
2813 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2815 *target_errno
= FILEIO_ENOSYS
;
2820 target_ops::fileio_close (int fd
, int *target_errno
)
2822 *target_errno
= FILEIO_ENOSYS
;
2827 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2830 *target_errno
= FILEIO_ENOSYS
;
2834 gdb::optional
<std::string
>
2835 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2838 *target_errno
= FILEIO_ENOSYS
;
2842 /* Helper for target_fileio_open and
2843 target_fileio_open_warn_if_slow. */
2846 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2847 int flags
, int mode
, int warn_if_slow
,
2850 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2852 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2853 warn_if_slow
, target_errno
);
2855 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2861 fd
= acquire_fileio_fd (t
, fd
);
2864 fprintf_unfiltered (gdb_stdlog
,
2865 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2867 inf
== NULL
? 0 : inf
->num
,
2868 filename
, flags
, mode
,
2870 fd
!= -1 ? 0 : *target_errno
);
2874 *target_errno
= FILEIO_ENOSYS
;
2881 target_fileio_open (struct inferior
*inf
, const char *filename
,
2882 int flags
, int mode
, int *target_errno
)
2884 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2891 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2892 const char *filename
,
2893 int flags
, int mode
, int *target_errno
)
2895 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2902 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2903 ULONGEST offset
, int *target_errno
)
2905 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2908 if (fh
->is_closed ())
2909 *target_errno
= EBADF
;
2910 else if (fh
->target
== NULL
)
2911 *target_errno
= EIO
;
2913 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2914 len
, offset
, target_errno
);
2917 fprintf_unfiltered (gdb_stdlog
,
2918 "target_fileio_pwrite (%d,...,%d,%s) "
2920 fd
, len
, pulongest (offset
),
2921 ret
, ret
!= -1 ? 0 : *target_errno
);
2928 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2929 ULONGEST offset
, int *target_errno
)
2931 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2934 if (fh
->is_closed ())
2935 *target_errno
= EBADF
;
2936 else if (fh
->target
== NULL
)
2937 *target_errno
= EIO
;
2939 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2940 len
, offset
, target_errno
);
2943 fprintf_unfiltered (gdb_stdlog
,
2944 "target_fileio_pread (%d,...,%d,%s) "
2946 fd
, len
, pulongest (offset
),
2947 ret
, ret
!= -1 ? 0 : *target_errno
);
2954 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2956 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2959 if (fh
->is_closed ())
2960 *target_errno
= EBADF
;
2961 else if (fh
->target
== NULL
)
2962 *target_errno
= EIO
;
2964 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2967 fprintf_unfiltered (gdb_stdlog
,
2968 "target_fileio_fstat (%d) = %d (%d)\n",
2969 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2976 target_fileio_close (int fd
, int *target_errno
)
2978 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2981 if (fh
->is_closed ())
2982 *target_errno
= EBADF
;
2985 if (fh
->target
!= NULL
)
2986 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2990 release_fileio_fd (fd
, fh
);
2994 fprintf_unfiltered (gdb_stdlog
,
2995 "target_fileio_close (%d) = %d (%d)\n",
2996 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
3003 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3006 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3008 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3010 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3014 fprintf_unfiltered (gdb_stdlog
,
3015 "target_fileio_unlink (%d,%s)"
3017 inf
== NULL
? 0 : inf
->num
, filename
,
3018 ret
, ret
!= -1 ? 0 : *target_errno
);
3022 *target_errno
= FILEIO_ENOSYS
;
3028 gdb::optional
<std::string
>
3029 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3032 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3034 gdb::optional
<std::string
> ret
3035 = t
->fileio_readlink (inf
, filename
, target_errno
);
3037 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3041 fprintf_unfiltered (gdb_stdlog
,
3042 "target_fileio_readlink (%d,%s)"
3044 inf
== NULL
? 0 : inf
->num
,
3045 filename
, ret
? ret
->c_str () : "(nil)",
3046 ret
? 0 : *target_errno
);
3050 *target_errno
= FILEIO_ENOSYS
;
3054 /* Like scoped_fd, but specific to target fileio. */
3056 class scoped_target_fd
3059 explicit scoped_target_fd (int fd
) noexcept
3064 ~scoped_target_fd ()
3070 target_fileio_close (m_fd
, &target_errno
);
3074 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3076 int get () const noexcept
3085 /* Read target file FILENAME, in the filesystem as seen by INF. If
3086 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3087 remote targets, the remote stub). Store the result in *BUF_P and
3088 return the size of the transferred data. PADDING additional bytes
3089 are available in *BUF_P. This is a helper function for
3090 target_fileio_read_alloc; see the declaration of that function for
3091 more information. */
3094 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3095 gdb_byte
**buf_p
, int padding
)
3097 size_t buf_alloc
, buf_pos
;
3102 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3103 0700, &target_errno
));
3104 if (fd
.get () == -1)
3107 /* Start by reading up to 4K at a time. The target will throttle
3108 this number down if necessary. */
3110 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3114 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3115 buf_alloc
- buf_pos
- padding
, buf_pos
,
3119 /* An error occurred. */
3125 /* Read all there was. */
3135 /* If the buffer is filling up, expand it. */
3136 if (buf_alloc
< buf_pos
* 2)
3139 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3149 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3152 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3157 gdb::unique_xmalloc_ptr
<char>
3158 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3162 LONGEST i
, transferred
;
3164 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3165 bufstr
= (char *) buffer
;
3167 if (transferred
< 0)
3168 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3170 if (transferred
== 0)
3171 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
3173 bufstr
[transferred
] = 0;
3175 /* Check for embedded NUL bytes; but allow trailing NULs. */
3176 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3179 warning (_("target file %s "
3180 "contained unexpected null characters"),
3185 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3190 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3191 CORE_ADDR addr
, int len
)
3193 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3197 default_watchpoint_addr_within_range (struct target_ops
*target
,
3199 CORE_ADDR start
, int length
)
3201 return addr
>= start
&& addr
< start
+ length
;
3204 static struct gdbarch
*
3205 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3207 inferior
*inf
= find_inferior_ptid (ptid
);
3208 gdb_assert (inf
!= NULL
);
3209 return inf
->gdbarch
;
3215 target_stack::find_beneath (const target_ops
*t
) const
3217 /* Look for a non-empty slot at stratum levels beneath T's. */
3218 for (int stratum
= t
->to_stratum
- 1; stratum
>= 0; --stratum
)
3219 if (m_stack
[stratum
] != NULL
)
3220 return m_stack
[stratum
];
3228 find_target_at (enum strata stratum
)
3230 return g_target_stack
.at (stratum
);
3238 target_announce_detach (int from_tty
)
3241 const char *exec_file
;
3246 exec_file
= get_exec_file (0);
3247 if (exec_file
== NULL
)
3250 pid
= inferior_ptid
.pid ();
3251 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3252 target_pid_to_str (ptid_t (pid
)));
3253 gdb_flush (gdb_stdout
);
3256 /* The inferior process has died. Long live the inferior! */
3259 generic_mourn_inferior (void)
3261 inferior
*inf
= current_inferior ();
3263 inferior_ptid
= null_ptid
;
3265 /* Mark breakpoints uninserted in case something tries to delete a
3266 breakpoint while we delete the inferior's threads (which would
3267 fail, since the inferior is long gone). */
3268 mark_breakpoints_out ();
3271 exit_inferior (inf
);
3273 /* Note this wipes step-resume breakpoints, so needs to be done
3274 after exit_inferior, which ends up referencing the step-resume
3275 breakpoints through clear_thread_inferior_resources. */
3276 breakpoint_init_inferior (inf_exited
);
3278 registers_changed ();
3280 reopen_exec_file ();
3281 reinit_frame_cache ();
3283 if (deprecated_detach_hook
)
3284 deprecated_detach_hook ();
3287 /* Convert a normal process ID to a string. Returns the string in a
3291 normal_pid_to_str (ptid_t ptid
)
3293 static char buf
[32];
3295 xsnprintf (buf
, sizeof buf
, "process %d", ptid
.pid ());
3300 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3302 return normal_pid_to_str (ptid
);
3305 /* Error-catcher for target_find_memory_regions. */
3307 dummy_find_memory_regions (struct target_ops
*self
,
3308 find_memory_region_ftype ignore1
, void *ignore2
)
3310 error (_("Command not implemented for this target."));
3314 /* Error-catcher for target_make_corefile_notes. */
3316 dummy_make_corefile_notes (struct target_ops
*self
,
3317 bfd
*ignore1
, int *ignore2
)
3319 error (_("Command not implemented for this target."));
3323 #include "target-delegates.c"
3326 static const target_info dummy_target_info
= {
3332 dummy_target::dummy_target ()
3334 to_stratum
= dummy_stratum
;
3337 debug_target::debug_target ()
3339 to_stratum
= debug_stratum
;
3343 dummy_target::info () const
3345 return dummy_target_info
;
3349 debug_target::info () const
3351 return beneath ()->info ();
3357 target_close (struct target_ops
*targ
)
3359 gdb_assert (!target_is_pushed (targ
));
3361 fileio_handles_invalidate_target (targ
);
3366 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3370 target_thread_alive (ptid_t ptid
)
3372 return current_top_target ()->thread_alive (ptid
);
3376 target_update_thread_list (void)
3378 current_top_target ()->update_thread_list ();
3382 target_stop (ptid_t ptid
)
3386 warning (_("May not interrupt or stop the target, ignoring attempt"));
3390 current_top_target ()->stop (ptid
);
3398 warning (_("May not interrupt or stop the target, ignoring attempt"));
3402 current_top_target ()->interrupt ();
3408 target_pass_ctrlc (void)
3410 current_top_target ()->pass_ctrlc ();
3416 default_target_pass_ctrlc (struct target_ops
*ops
)
3418 target_interrupt ();
3421 /* See target/target.h. */
3424 target_stop_and_wait (ptid_t ptid
)
3426 struct target_waitstatus status
;
3427 int was_non_stop
= non_stop
;
3432 memset (&status
, 0, sizeof (status
));
3433 target_wait (ptid
, &status
, 0);
3435 non_stop
= was_non_stop
;
3438 /* See target/target.h. */
3441 target_continue_no_signal (ptid_t ptid
)
3443 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3446 /* See target/target.h. */
3449 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3451 target_resume (ptid
, 0, signal
);
3454 /* Concatenate ELEM to LIST, a comma-separated list. */
3457 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3459 if (!list
->empty ())
3460 list
->append (", ");
3462 list
->append (elem
);
3465 /* Helper for target_options_to_string. If OPT is present in
3466 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3467 OPT is removed from TARGET_OPTIONS. */
3470 do_option (int *target_options
, std::string
*ret
,
3471 int opt
, const char *opt_str
)
3473 if ((*target_options
& opt
) != 0)
3475 str_comma_list_concat_elem (ret
, opt_str
);
3476 *target_options
&= ~opt
;
3483 target_options_to_string (int target_options
)
3487 #define DO_TARG_OPTION(OPT) \
3488 do_option (&target_options, &ret, OPT, #OPT)
3490 DO_TARG_OPTION (TARGET_WNOHANG
);
3492 if (target_options
!= 0)
3493 str_comma_list_concat_elem (&ret
, "unknown???");
3499 target_fetch_registers (struct regcache
*regcache
, int regno
)
3501 current_top_target ()->fetch_registers (regcache
, regno
);
3503 regcache
->debug_print_register ("target_fetch_registers", regno
);
3507 target_store_registers (struct regcache
*regcache
, int regno
)
3509 if (!may_write_registers
)
3510 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3512 current_top_target ()->store_registers (regcache
, regno
);
3515 regcache
->debug_print_register ("target_store_registers", regno
);
3520 target_core_of_thread (ptid_t ptid
)
3522 return current_top_target ()->core_of_thread (ptid
);
3526 simple_verify_memory (struct target_ops
*ops
,
3527 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3529 LONGEST total_xfered
= 0;
3531 while (total_xfered
< size
)
3533 ULONGEST xfered_len
;
3534 enum target_xfer_status status
;
3536 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3538 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3539 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3541 if (status
== TARGET_XFER_OK
3542 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3544 total_xfered
+= xfered_len
;
3553 /* Default implementation of memory verification. */
3556 default_verify_memory (struct target_ops
*self
,
3557 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3559 /* Start over from the top of the target stack. */
3560 return simple_verify_memory (current_top_target (),
3561 data
, memaddr
, size
);
3565 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3567 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3570 /* The documentation for this function is in its prototype declaration in
3574 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3575 enum target_hw_bp_type rw
)
3577 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3580 /* The documentation for this function is in its prototype declaration in
3584 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3585 enum target_hw_bp_type rw
)
3587 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3590 /* The documentation for this function is in its prototype declaration
3594 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3596 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3599 /* The documentation for this function is in its prototype declaration
3603 target_ranged_break_num_registers (void)
3605 return current_top_target ()->ranged_break_num_registers ();
3610 struct btrace_target_info
*
3611 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3613 return current_top_target ()->enable_btrace (ptid
, conf
);
3619 target_disable_btrace (struct btrace_target_info
*btinfo
)
3621 current_top_target ()->disable_btrace (btinfo
);
3627 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3629 current_top_target ()->teardown_btrace (btinfo
);
3635 target_read_btrace (struct btrace_data
*btrace
,
3636 struct btrace_target_info
*btinfo
,
3637 enum btrace_read_type type
)
3639 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3644 const struct btrace_config
*
3645 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3647 return current_top_target ()->btrace_conf (btinfo
);
3653 target_stop_recording (void)
3655 current_top_target ()->stop_recording ();
3661 target_save_record (const char *filename
)
3663 current_top_target ()->save_record (filename
);
3669 target_supports_delete_record ()
3671 return current_top_target ()->supports_delete_record ();
3677 target_delete_record (void)
3679 current_top_target ()->delete_record ();
3685 target_record_method (ptid_t ptid
)
3687 return current_top_target ()->record_method (ptid
);
3693 target_record_is_replaying (ptid_t ptid
)
3695 return current_top_target ()->record_is_replaying (ptid
);
3701 target_record_will_replay (ptid_t ptid
, int dir
)
3703 return current_top_target ()->record_will_replay (ptid
, dir
);
3709 target_record_stop_replaying (void)
3711 current_top_target ()->record_stop_replaying ();
3717 target_goto_record_begin (void)
3719 current_top_target ()->goto_record_begin ();
3725 target_goto_record_end (void)
3727 current_top_target ()->goto_record_end ();
3733 target_goto_record (ULONGEST insn
)
3735 current_top_target ()->goto_record (insn
);
3741 target_insn_history (int size
, gdb_disassembly_flags flags
)
3743 current_top_target ()->insn_history (size
, flags
);
3749 target_insn_history_from (ULONGEST from
, int size
,
3750 gdb_disassembly_flags flags
)
3752 current_top_target ()->insn_history_from (from
, size
, flags
);
3758 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3759 gdb_disassembly_flags flags
)
3761 current_top_target ()->insn_history_range (begin
, end
, flags
);
3767 target_call_history (int size
, record_print_flags flags
)
3769 current_top_target ()->call_history (size
, flags
);
3775 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3777 current_top_target ()->call_history_from (begin
, size
, flags
);
3783 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3785 current_top_target ()->call_history_range (begin
, end
, flags
);
3790 const struct frame_unwind
*
3791 target_get_unwinder (void)
3793 return current_top_target ()->get_unwinder ();
3798 const struct frame_unwind
*
3799 target_get_tailcall_unwinder (void)
3801 return current_top_target ()->get_tailcall_unwinder ();
3807 target_prepare_to_generate_core (void)
3809 current_top_target ()->prepare_to_generate_core ();
3815 target_done_generating_core (void)
3817 current_top_target ()->done_generating_core ();
3822 static char targ_desc
[] =
3823 "Names of targets and files being debugged.\nShows the entire \
3824 stack of targets currently in use (including the exec-file,\n\
3825 core-file, and process, if any), as well as the symbol file name.";
3828 default_rcmd (struct target_ops
*self
, const char *command
,
3829 struct ui_file
*output
)
3831 error (_("\"monitor\" command not supported by this target."));
3835 do_monitor_command (const char *cmd
, int from_tty
)
3837 target_rcmd (cmd
, gdb_stdtarg
);
3840 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3844 flash_erase_command (const char *cmd
, int from_tty
)
3846 /* Used to communicate termination of flash operations to the target. */
3847 bool found_flash_region
= false;
3848 struct gdbarch
*gdbarch
= target_gdbarch ();
3850 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3852 /* Iterate over all memory regions. */
3853 for (const mem_region
&m
: mem_regions
)
3855 /* Is this a flash memory region? */
3856 if (m
.attrib
.mode
== MEM_FLASH
)
3858 found_flash_region
= true;
3859 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3861 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3863 current_uiout
->message (_("Erasing flash memory region at address "));
3864 current_uiout
->field_fmt ("address", "%s", paddress (gdbarch
, m
.lo
));
3865 current_uiout
->message (", size = ");
3866 current_uiout
->field_fmt ("size", "%s", hex_string (m
.hi
- m
.lo
));
3867 current_uiout
->message ("\n");
3871 /* Did we do any flash operations? If so, we need to finalize them. */
3872 if (found_flash_region
)
3873 target_flash_done ();
3875 current_uiout
->message (_("No flash memory regions found.\n"));
3878 /* Print the name of each layers of our target stack. */
3881 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3883 printf_filtered (_("The current target stack is:\n"));
3885 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3887 if (t
->to_stratum
== debug_stratum
)
3889 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3896 target_async (int enable
)
3898 infrun_async (enable
);
3899 current_top_target ()->async (enable
);
3905 target_thread_events (int enable
)
3907 current_top_target ()->thread_events (enable
);
3910 /* Controls if targets can report that they can/are async. This is
3911 just for maintainers to use when debugging gdb. */
3912 int target_async_permitted
= 1;
3914 /* The set command writes to this variable. If the inferior is
3915 executing, target_async_permitted is *not* updated. */
3916 static int target_async_permitted_1
= 1;
3919 maint_set_target_async_command (const char *args
, int from_tty
,
3920 struct cmd_list_element
*c
)
3922 if (have_live_inferiors ())
3924 target_async_permitted_1
= target_async_permitted
;
3925 error (_("Cannot change this setting while the inferior is running."));
3928 target_async_permitted
= target_async_permitted_1
;
3932 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3933 struct cmd_list_element
*c
,
3936 fprintf_filtered (file
,
3937 _("Controlling the inferior in "
3938 "asynchronous mode is %s.\n"), value
);
3941 /* Return true if the target operates in non-stop mode even with "set
3945 target_always_non_stop_p (void)
3947 return current_top_target ()->always_non_stop_p ();
3953 target_is_non_stop_p (void)
3956 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3957 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3958 && target_always_non_stop_p ()));
3961 /* Controls if targets can report that they always run in non-stop
3962 mode. This is just for maintainers to use when debugging gdb. */
3963 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3965 /* The set command writes to this variable. If the inferior is
3966 executing, target_non_stop_enabled is *not* updated. */
3967 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3969 /* Implementation of "maint set target-non-stop". */
3972 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3973 struct cmd_list_element
*c
)
3975 if (have_live_inferiors ())
3977 target_non_stop_enabled_1
= target_non_stop_enabled
;
3978 error (_("Cannot change this setting while the inferior is running."));
3981 target_non_stop_enabled
= target_non_stop_enabled_1
;
3984 /* Implementation of "maint show target-non-stop". */
3987 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3988 struct cmd_list_element
*c
,
3991 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3992 fprintf_filtered (file
,
3993 _("Whether the target is always in non-stop mode "
3994 "is %s (currently %s).\n"), value
,
3995 target_always_non_stop_p () ? "on" : "off");
3997 fprintf_filtered (file
,
3998 _("Whether the target is always in non-stop mode "
3999 "is %s.\n"), value
);
4002 /* Temporary copies of permission settings. */
4004 static int may_write_registers_1
= 1;
4005 static int may_write_memory_1
= 1;
4006 static int may_insert_breakpoints_1
= 1;
4007 static int may_insert_tracepoints_1
= 1;
4008 static int may_insert_fast_tracepoints_1
= 1;
4009 static int may_stop_1
= 1;
4011 /* Make the user-set values match the real values again. */
4014 update_target_permissions (void)
4016 may_write_registers_1
= may_write_registers
;
4017 may_write_memory_1
= may_write_memory
;
4018 may_insert_breakpoints_1
= may_insert_breakpoints
;
4019 may_insert_tracepoints_1
= may_insert_tracepoints
;
4020 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4021 may_stop_1
= may_stop
;
4024 /* The one function handles (most of) the permission flags in the same
4028 set_target_permissions (const char *args
, int from_tty
,
4029 struct cmd_list_element
*c
)
4031 if (target_has_execution
)
4033 update_target_permissions ();
4034 error (_("Cannot change this setting while the inferior is running."));
4037 /* Make the real values match the user-changed values. */
4038 may_write_registers
= may_write_registers_1
;
4039 may_insert_breakpoints
= may_insert_breakpoints_1
;
4040 may_insert_tracepoints
= may_insert_tracepoints_1
;
4041 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4042 may_stop
= may_stop_1
;
4043 update_observer_mode ();
4046 /* Set memory write permission independently of observer mode. */
4049 set_write_memory_permission (const char *args
, int from_tty
,
4050 struct cmd_list_element
*c
)
4052 /* Make the real values match the user-changed values. */
4053 may_write_memory
= may_write_memory_1
;
4054 update_observer_mode ();
4058 initialize_targets (void)
4060 the_dummy_target
= new dummy_target ();
4061 push_target (the_dummy_target
);
4063 the_debug_target
= new debug_target ();
4065 add_info ("target", info_target_command
, targ_desc
);
4066 add_info ("files", info_target_command
, targ_desc
);
4068 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4069 Set target debugging."), _("\
4070 Show target debugging."), _("\
4071 When non-zero, target debugging is enabled. Higher numbers are more\n\
4075 &setdebuglist
, &showdebuglist
);
4077 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4078 &trust_readonly
, _("\
4079 Set mode for reading from readonly sections."), _("\
4080 Show mode for reading from readonly sections."), _("\
4081 When this mode is on, memory reads from readonly sections (such as .text)\n\
4082 will be read from the object file instead of from the target. This will\n\
4083 result in significant performance improvement for remote targets."),
4085 show_trust_readonly
,
4086 &setlist
, &showlist
);
4088 add_com ("monitor", class_obscure
, do_monitor_command
,
4089 _("Send a command to the remote monitor (remote targets only)."));
4091 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4092 _("Print the name of each layer of the internal target stack."),
4093 &maintenanceprintlist
);
4095 add_setshow_boolean_cmd ("target-async", no_class
,
4096 &target_async_permitted_1
, _("\
4097 Set whether gdb controls the inferior in asynchronous mode."), _("\
4098 Show whether gdb controls the inferior in asynchronous mode."), _("\
4099 Tells gdb whether to control the inferior in asynchronous mode."),
4100 maint_set_target_async_command
,
4101 maint_show_target_async_command
,
4102 &maintenance_set_cmdlist
,
4103 &maintenance_show_cmdlist
);
4105 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4106 &target_non_stop_enabled_1
, _("\
4107 Set whether gdb always controls the inferior in non-stop mode."), _("\
4108 Show whether gdb always controls the inferior in non-stop mode."), _("\
4109 Tells gdb whether to control the inferior in non-stop mode."),
4110 maint_set_target_non_stop_command
,
4111 maint_show_target_non_stop_command
,
4112 &maintenance_set_cmdlist
,
4113 &maintenance_show_cmdlist
);
4115 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4116 &may_write_registers_1
, _("\
4117 Set permission to write into registers."), _("\
4118 Show permission to write into registers."), _("\
4119 When this permission is on, GDB may write into the target's registers.\n\
4120 Otherwise, any sort of write attempt will result in an error."),
4121 set_target_permissions
, NULL
,
4122 &setlist
, &showlist
);
4124 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4125 &may_write_memory_1
, _("\
4126 Set permission to write into target memory."), _("\
4127 Show permission to write into target memory."), _("\
4128 When this permission is on, GDB may write into the target's memory.\n\
4129 Otherwise, any sort of write attempt will result in an error."),
4130 set_write_memory_permission
, NULL
,
4131 &setlist
, &showlist
);
4133 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4134 &may_insert_breakpoints_1
, _("\
4135 Set permission to insert breakpoints in the target."), _("\
4136 Show permission to insert breakpoints in the target."), _("\
4137 When this permission is on, GDB may insert breakpoints in the program.\n\
4138 Otherwise, any sort of insertion attempt will result in an error."),
4139 set_target_permissions
, NULL
,
4140 &setlist
, &showlist
);
4142 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4143 &may_insert_tracepoints_1
, _("\
4144 Set permission to insert tracepoints in the target."), _("\
4145 Show permission to insert tracepoints in the target."), _("\
4146 When this permission is on, GDB may insert tracepoints in the program.\n\
4147 Otherwise, any sort of insertion attempt will result in an error."),
4148 set_target_permissions
, NULL
,
4149 &setlist
, &showlist
);
4151 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4152 &may_insert_fast_tracepoints_1
, _("\
4153 Set permission to insert fast tracepoints in the target."), _("\
4154 Show permission to insert fast tracepoints in the target."), _("\
4155 When this permission is on, GDB may insert fast tracepoints.\n\
4156 Otherwise, any sort of insertion attempt will result in an error."),
4157 set_target_permissions
, NULL
,
4158 &setlist
, &showlist
);
4160 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4162 Set permission to interrupt or signal the target."), _("\
4163 Show permission to interrupt or signal the target."), _("\
4164 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4165 Otherwise, any attempt to interrupt or stop will be ignored."),
4166 set_target_permissions
, NULL
,
4167 &setlist
, &showlist
);
4169 add_com ("flash-erase", no_class
, flash_erase_command
,
4170 _("Erase all flash memory regions."));
4172 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4173 &auto_connect_native_target
, _("\
4174 Set whether GDB may automatically connect to the native target."), _("\
4175 Show whether GDB may automatically connect to the native target."), _("\
4176 When on, and GDB is not connected to a target yet, GDB\n\
4177 attempts \"run\" and other commands with the native target."),
4178 NULL
, show_auto_connect_native_target
,
4179 &setlist
, &showlist
);