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
;
476 struct inferior
*inf
;
480 if (inf
->terminal_state
== target_terminal_state::is_ours_for_output
)
482 set_current_inferior (inf
);
483 current_top_target ()->terminal_inferior ();
484 inf
->terminal_state
= target_terminal_state::is_inferior
;
489 m_terminal_state
= target_terminal_state::is_inferior
;
491 /* If the user hit C-c before, pretend that it was hit right
493 if (check_quit_flag ())
494 target_pass_ctrlc ();
497 /* Switch terminal state to DESIRED_STATE, either is_ours, or
498 is_ours_for_output. */
501 target_terminal_is_ours_kind (target_terminal_state desired_state
)
503 scoped_restore_current_inferior restore_inferior
;
504 struct inferior
*inf
;
506 /* Must do this in two passes. First, have all inferiors save the
507 current terminal settings. Then, after all inferiors have add a
508 chance to safely save the terminal settings, restore GDB's
509 terminal settings. */
513 if (inf
->terminal_state
== target_terminal_state::is_inferior
)
515 set_current_inferior (inf
);
516 current_top_target ()->terminal_save_inferior ();
522 /* Note we don't check is_inferior here like above because we
523 need to handle 'is_ours_for_output -> is_ours' too. Careful
524 to never transition from 'is_ours' to 'is_ours_for_output',
526 if (inf
->terminal_state
!= target_terminal_state::is_ours
527 && inf
->terminal_state
!= desired_state
)
529 set_current_inferior (inf
);
530 if (desired_state
== target_terminal_state::is_ours
)
531 current_top_target ()->terminal_ours ();
532 else if (desired_state
== target_terminal_state::is_ours_for_output
)
533 current_top_target ()->terminal_ours_for_output ();
535 gdb_assert_not_reached ("unhandled desired state");
536 inf
->terminal_state
= desired_state
;
541 /* See target/target.h. */
544 target_terminal::ours ()
546 struct ui
*ui
= current_ui
;
548 /* See target_terminal::inferior. */
552 if (m_terminal_state
== target_terminal_state::is_ours
)
555 target_terminal_is_ours_kind (target_terminal_state::is_ours
);
556 m_terminal_state
= target_terminal_state::is_ours
;
559 /* See target/target.h. */
562 target_terminal::ours_for_output ()
564 struct ui
*ui
= current_ui
;
566 /* See target_terminal::inferior. */
570 if (!target_terminal::is_inferior ())
573 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output
);
574 target_terminal::m_terminal_state
= target_terminal_state::is_ours_for_output
;
577 /* See target/target.h. */
580 target_terminal::info (const char *arg
, int from_tty
)
582 current_top_target ()->terminal_info (arg
, from_tty
);
588 target_supports_terminal_ours (void)
590 return current_top_target ()->supports_terminal_ours ();
596 error (_("You can't do that when your target is `%s'"),
597 current_top_target ()->shortname ());
603 error (_("You can't do that without a process to debug."));
607 default_terminal_info (struct target_ops
*self
, const char *args
, int from_tty
)
609 printf_unfiltered (_("No saved terminal information.\n"));
612 /* A default implementation for the to_get_ada_task_ptid target method.
614 This function builds the PTID by using both LWP and TID as part of
615 the PTID lwp and tid elements. The pid used is the pid of the
619 default_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long tid
)
621 return ptid_t (inferior_ptid
.pid (), lwp
, tid
);
624 static enum exec_direction_kind
625 default_execution_direction (struct target_ops
*self
)
627 if (!target_can_execute_reverse
)
629 else if (!target_can_async_p ())
632 gdb_assert_not_reached ("\
633 to_execution_direction must be implemented for reverse async");
639 target_stack::push (target_ops
*t
)
641 /* If there's already a target at this stratum, remove it. */
642 if (m_stack
[t
->to_stratum
] != NULL
)
644 target_ops
*prev
= m_stack
[t
->to_stratum
];
645 m_stack
[t
->to_stratum
] = NULL
;
649 /* Now add the new one. */
650 m_stack
[t
->to_stratum
] = t
;
652 if (m_top
< t
->to_stratum
)
653 m_top
= t
->to_stratum
;
659 push_target (struct target_ops
*t
)
661 g_target_stack
.push (t
);
667 unpush_target (struct target_ops
*t
)
669 return g_target_stack
.unpush (t
);
675 target_stack::unpush (target_ops
*t
)
677 if (t
->to_stratum
== dummy_stratum
)
678 internal_error (__FILE__
, __LINE__
,
679 _("Attempt to unpush the dummy target"));
681 gdb_assert (t
!= NULL
);
683 /* Look for the specified target. Note that a target can only occur
684 once in the target stack. */
686 if (m_stack
[t
->to_stratum
] != t
)
688 /* If T wasn't pushed, quit. Only open targets should be
693 /* Unchain the target. */
694 m_stack
[t
->to_stratum
] = NULL
;
696 if (m_top
== t
->to_stratum
)
697 m_top
= t
->beneath ()->to_stratum
;
699 /* Finally close the target. Note we do this after unchaining, so
700 any target method calls from within the target_close
701 implementation don't end up in T anymore. */
707 /* Unpush TARGET and assert that it worked. */
710 unpush_target_and_assert (struct target_ops
*target
)
712 if (!unpush_target (target
))
714 fprintf_unfiltered (gdb_stderr
,
715 "pop_all_targets couldn't find target %s\n",
716 target
->shortname ());
717 internal_error (__FILE__
, __LINE__
,
718 _("failed internal consistency check"));
723 pop_all_targets_above (enum strata above_stratum
)
725 while ((int) (current_top_target ()->to_stratum
) > (int) above_stratum
)
726 unpush_target_and_assert (current_top_target ());
732 pop_all_targets_at_and_above (enum strata stratum
)
734 while ((int) (current_top_target ()->to_stratum
) >= (int) stratum
)
735 unpush_target_and_assert (current_top_target ());
739 pop_all_targets (void)
741 pop_all_targets_above (dummy_stratum
);
744 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
747 target_is_pushed (struct target_ops
*t
)
749 return g_target_stack
.is_pushed (t
);
752 /* Default implementation of to_get_thread_local_address. */
755 generic_tls_error (void)
757 throw_error (TLS_GENERIC_ERROR
,
758 _("Cannot find thread-local variables on this target"));
761 /* Using the objfile specified in OBJFILE, find the address for the
762 current thread's thread-local storage with offset OFFSET. */
764 target_translate_tls_address (struct objfile
*objfile
, CORE_ADDR offset
)
766 volatile CORE_ADDR addr
= 0;
767 struct target_ops
*target
= current_top_target ();
769 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
771 ptid_t ptid
= inferior_ptid
;
777 /* Fetch the load module address for this objfile. */
778 lm_addr
= gdbarch_fetch_tls_load_module_address (target_gdbarch (),
781 addr
= target
->get_thread_local_address (ptid
, lm_addr
, offset
);
783 /* If an error occurred, print TLS related messages here. Otherwise,
784 throw the error to some higher catcher. */
785 CATCH (ex
, RETURN_MASK_ALL
)
787 int objfile_is_library
= (objfile
->flags
& OBJF_SHARED
);
791 case TLS_NO_LIBRARY_SUPPORT_ERROR
:
792 error (_("Cannot find thread-local variables "
793 "in this thread library."));
795 case TLS_LOAD_MODULE_NOT_FOUND_ERROR
:
796 if (objfile_is_library
)
797 error (_("Cannot find shared library `%s' in dynamic"
798 " linker's load module list"), objfile_name (objfile
));
800 error (_("Cannot find executable file `%s' in dynamic"
801 " linker's load module list"), objfile_name (objfile
));
803 case TLS_NOT_ALLOCATED_YET_ERROR
:
804 if (objfile_is_library
)
805 error (_("The inferior has not yet allocated storage for"
806 " thread-local variables in\n"
807 "the shared library `%s'\n"
809 objfile_name (objfile
), target_pid_to_str (ptid
));
811 error (_("The inferior has not yet allocated storage for"
812 " thread-local variables in\n"
813 "the executable `%s'\n"
815 objfile_name (objfile
), target_pid_to_str (ptid
));
817 case TLS_GENERIC_ERROR
:
818 if (objfile_is_library
)
819 error (_("Cannot find thread-local storage for %s, "
820 "shared library %s:\n%s"),
821 target_pid_to_str (ptid
),
822 objfile_name (objfile
), ex
.message
);
824 error (_("Cannot find thread-local storage for %s, "
825 "executable file %s:\n%s"),
826 target_pid_to_str (ptid
),
827 objfile_name (objfile
), ex
.message
);
830 throw_exception (ex
);
836 /* It wouldn't be wrong here to try a gdbarch method, too; finding
837 TLS is an ABI-specific thing. But we don't do that yet. */
839 error (_("Cannot find thread-local variables on this target"));
845 target_xfer_status_to_string (enum target_xfer_status status
)
847 #define CASE(X) case X: return #X
850 CASE(TARGET_XFER_E_IO
);
851 CASE(TARGET_XFER_UNAVAILABLE
);
860 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
862 /* target_read_string -- read a null terminated string, up to LEN bytes,
863 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
864 Set *STRING to a pointer to malloc'd memory containing the data; the caller
865 is responsible for freeing it. Return the number of bytes successfully
869 target_read_string (CORE_ADDR memaddr
, gdb::unique_xmalloc_ptr
<char> *string
,
870 int len
, int *errnop
)
876 int buffer_allocated
;
878 unsigned int nbytes_read
= 0;
882 /* Small for testing. */
883 buffer_allocated
= 4;
884 buffer
= (char *) xmalloc (buffer_allocated
);
889 tlen
= MIN (len
, 4 - (memaddr
& 3));
890 offset
= memaddr
& 3;
892 errcode
= target_read_memory (memaddr
& ~3, buf
, sizeof buf
);
895 /* The transfer request might have crossed the boundary to an
896 unallocated region of memory. Retry the transfer, requesting
900 errcode
= target_read_memory (memaddr
, buf
, 1);
905 if (bufptr
- buffer
+ tlen
> buffer_allocated
)
909 bytes
= bufptr
- buffer
;
910 buffer_allocated
*= 2;
911 buffer
= (char *) xrealloc (buffer
, buffer_allocated
);
912 bufptr
= buffer
+ bytes
;
915 for (i
= 0; i
< tlen
; i
++)
917 *bufptr
++ = buf
[i
+ offset
];
918 if (buf
[i
+ offset
] == '\000')
920 nbytes_read
+= i
+ 1;
930 string
->reset (buffer
);
936 struct target_section_table
*
937 target_get_section_table (struct target_ops
*target
)
939 return target
->get_section_table ();
942 /* Find a section containing ADDR. */
944 struct target_section
*
945 target_section_by_addr (struct target_ops
*target
, CORE_ADDR addr
)
947 struct target_section_table
*table
= target_get_section_table (target
);
948 struct target_section
*secp
;
953 for (secp
= table
->sections
; secp
< table
->sections_end
; secp
++)
955 if (addr
>= secp
->addr
&& addr
< secp
->endaddr
)
962 /* Helper for the memory xfer routines. Checks the attributes of the
963 memory region of MEMADDR against the read or write being attempted.
964 If the access is permitted returns true, otherwise returns false.
965 REGION_P is an optional output parameter. If not-NULL, it is
966 filled with a pointer to the memory region of MEMADDR. REG_LEN
967 returns LEN trimmed to the end of the region. This is how much the
968 caller can continue requesting, if the access is permitted. A
969 single xfer request must not straddle memory region boundaries. */
972 memory_xfer_check_region (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
973 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*reg_len
,
974 struct mem_region
**region_p
)
976 struct mem_region
*region
;
978 region
= lookup_mem_region (memaddr
);
980 if (region_p
!= NULL
)
983 switch (region
->attrib
.mode
)
986 if (writebuf
!= NULL
)
996 /* We only support writing to flash during "load" for now. */
997 if (writebuf
!= NULL
)
998 error (_("Writing to flash memory forbidden in this context"));
1005 /* region->hi == 0 means there's no upper bound. */
1006 if (memaddr
+ len
< region
->hi
|| region
->hi
== 0)
1009 *reg_len
= region
->hi
- memaddr
;
1014 /* Read memory from more than one valid target. A core file, for
1015 instance, could have some of memory but delegate other bits to
1016 the target below it. So, we must manually try all targets. */
1018 enum target_xfer_status
1019 raw_memory_xfer_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
1020 const gdb_byte
*writebuf
, ULONGEST memaddr
, LONGEST len
,
1021 ULONGEST
*xfered_len
)
1023 enum target_xfer_status res
;
1027 res
= ops
->xfer_partial (TARGET_OBJECT_MEMORY
, NULL
,
1028 readbuf
, writebuf
, memaddr
, len
,
1030 if (res
== TARGET_XFER_OK
)
1033 /* Stop if the target reports that the memory is not available. */
1034 if (res
== TARGET_XFER_UNAVAILABLE
)
1037 /* We want to continue past core files to executables, but not
1038 past a running target's memory. */
1039 if (ops
->has_all_memory ())
1042 ops
= ops
->beneath ();
1044 while (ops
!= NULL
);
1046 /* The cache works at the raw memory level. Make sure the cache
1047 gets updated with raw contents no matter what kind of memory
1048 object was originally being written. Note we do write-through
1049 first, so that if it fails, we don't write to the cache contents
1050 that never made it to the target. */
1051 if (writebuf
!= NULL
1052 && inferior_ptid
!= null_ptid
1053 && target_dcache_init_p ()
1054 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1056 DCACHE
*dcache
= target_dcache_get ();
1058 /* Note that writing to an area of memory which wasn't present
1059 in the cache doesn't cause it to be loaded in. */
1060 dcache_update (dcache
, res
, memaddr
, writebuf
, *xfered_len
);
1066 /* Perform a partial memory transfer.
1067 For docs see target.h, to_xfer_partial. */
1069 static enum target_xfer_status
1070 memory_xfer_partial_1 (struct target_ops
*ops
, enum target_object object
,
1071 gdb_byte
*readbuf
, const gdb_byte
*writebuf
, ULONGEST memaddr
,
1072 ULONGEST len
, ULONGEST
*xfered_len
)
1074 enum target_xfer_status res
;
1076 struct mem_region
*region
;
1077 struct inferior
*inf
;
1079 /* For accesses to unmapped overlay sections, read directly from
1080 files. Must do this first, as MEMADDR may need adjustment. */
1081 if (readbuf
!= NULL
&& overlay_debugging
)
1083 struct obj_section
*section
= find_pc_overlay (memaddr
);
1085 if (pc_in_unmapped_range (memaddr
, section
))
1087 struct target_section_table
*table
1088 = target_get_section_table (ops
);
1089 const char *section_name
= section
->the_bfd_section
->name
;
1091 memaddr
= overlay_mapped_address (memaddr
, section
);
1092 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1093 memaddr
, len
, xfered_len
,
1095 table
->sections_end
,
1100 /* Try the executable files, if "trust-readonly-sections" is set. */
1101 if (readbuf
!= NULL
&& trust_readonly
)
1103 struct target_section
*secp
;
1104 struct target_section_table
*table
;
1106 secp
= target_section_by_addr (ops
, memaddr
);
1108 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
1109 secp
->the_bfd_section
)
1112 table
= target_get_section_table (ops
);
1113 return section_table_xfer_memory_partial (readbuf
, writebuf
,
1114 memaddr
, len
, xfered_len
,
1116 table
->sections_end
,
1121 /* Try GDB's internal data cache. */
1123 if (!memory_xfer_check_region (readbuf
, writebuf
, memaddr
, len
, ®_len
,
1125 return TARGET_XFER_E_IO
;
1127 if (inferior_ptid
!= null_ptid
)
1128 inf
= current_inferior ();
1134 /* The dcache reads whole cache lines; that doesn't play well
1135 with reading from a trace buffer, because reading outside of
1136 the collected memory range fails. */
1137 && get_traceframe_number () == -1
1138 && (region
->attrib
.cache
1139 || (stack_cache_enabled_p () && object
== TARGET_OBJECT_STACK_MEMORY
)
1140 || (code_cache_enabled_p () && object
== TARGET_OBJECT_CODE_MEMORY
)))
1142 DCACHE
*dcache
= target_dcache_get_or_init ();
1144 return dcache_read_memory_partial (ops
, dcache
, memaddr
, readbuf
,
1145 reg_len
, xfered_len
);
1148 /* If none of those methods found the memory we wanted, fall back
1149 to a target partial transfer. Normally a single call to
1150 to_xfer_partial is enough; if it doesn't recognize an object
1151 it will call the to_xfer_partial of the next target down.
1152 But for memory this won't do. Memory is the only target
1153 object which can be read from more than one valid target.
1154 A core file, for instance, could have some of memory but
1155 delegate other bits to the target below it. So, we must
1156 manually try all targets. */
1158 res
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, memaddr
, reg_len
,
1161 /* If we still haven't got anything, return the last error. We
1166 /* Perform a partial memory transfer. For docs see target.h,
1169 static enum target_xfer_status
1170 memory_xfer_partial (struct target_ops
*ops
, enum target_object object
,
1171 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1172 ULONGEST memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
1174 enum target_xfer_status res
;
1176 /* Zero length requests are ok and require no work. */
1178 return TARGET_XFER_EOF
;
1180 memaddr
= address_significant (target_gdbarch (), memaddr
);
1182 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1183 breakpoint insns, thus hiding out from higher layers whether
1184 there are software breakpoints inserted in the code stream. */
1185 if (readbuf
!= NULL
)
1187 res
= memory_xfer_partial_1 (ops
, object
, readbuf
, NULL
, memaddr
, len
,
1190 if (res
== TARGET_XFER_OK
&& !show_memory_breakpoints
)
1191 breakpoint_xfer_memory (readbuf
, NULL
, NULL
, memaddr
, *xfered_len
);
1195 /* A large write request is likely to be partially satisfied
1196 by memory_xfer_partial_1. We will continually malloc
1197 and free a copy of the entire write request for breakpoint
1198 shadow handling even though we only end up writing a small
1199 subset of it. Cap writes to a limit specified by the target
1200 to mitigate this. */
1201 len
= std::min (ops
->get_memory_xfer_limit (), len
);
1203 gdb::byte_vector
buf (writebuf
, writebuf
+ len
);
1204 breakpoint_xfer_memory (NULL
, buf
.data (), writebuf
, memaddr
, len
);
1205 res
= memory_xfer_partial_1 (ops
, object
, NULL
, buf
.data (), memaddr
, len
,
1212 scoped_restore_tmpl
<int>
1213 make_scoped_restore_show_memory_breakpoints (int show
)
1215 return make_scoped_restore (&show_memory_breakpoints
, show
);
1218 /* For docs see target.h, to_xfer_partial. */
1220 enum target_xfer_status
1221 target_xfer_partial (struct target_ops
*ops
,
1222 enum target_object object
, const char *annex
,
1223 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
1224 ULONGEST offset
, ULONGEST len
,
1225 ULONGEST
*xfered_len
)
1227 enum target_xfer_status retval
;
1229 /* Transfer is done when LEN is zero. */
1231 return TARGET_XFER_EOF
;
1233 if (writebuf
&& !may_write_memory
)
1234 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1235 core_addr_to_string_nz (offset
), plongest (len
));
1239 /* If this is a memory transfer, let the memory-specific code
1240 have a look at it instead. Memory transfers are more
1242 if (object
== TARGET_OBJECT_MEMORY
|| object
== TARGET_OBJECT_STACK_MEMORY
1243 || object
== TARGET_OBJECT_CODE_MEMORY
)
1244 retval
= memory_xfer_partial (ops
, object
, readbuf
,
1245 writebuf
, offset
, len
, xfered_len
);
1246 else if (object
== TARGET_OBJECT_RAW_MEMORY
)
1248 /* Skip/avoid accessing the target if the memory region
1249 attributes block the access. Check this here instead of in
1250 raw_memory_xfer_partial as otherwise we'd end up checking
1251 this twice in the case of the memory_xfer_partial path is
1252 taken; once before checking the dcache, and another in the
1253 tail call to raw_memory_xfer_partial. */
1254 if (!memory_xfer_check_region (readbuf
, writebuf
, offset
, len
, &len
,
1256 return TARGET_XFER_E_IO
;
1258 /* Request the normal memory object from other layers. */
1259 retval
= raw_memory_xfer_partial (ops
, readbuf
, writebuf
, offset
, len
,
1263 retval
= ops
->xfer_partial (object
, annex
, readbuf
,
1264 writebuf
, offset
, len
, xfered_len
);
1268 const unsigned char *myaddr
= NULL
;
1270 fprintf_unfiltered (gdb_stdlog
,
1271 "%s:target_xfer_partial "
1272 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1275 (annex
? annex
: "(null)"),
1276 host_address_to_string (readbuf
),
1277 host_address_to_string (writebuf
),
1278 core_addr_to_string_nz (offset
),
1279 pulongest (len
), retval
,
1280 pulongest (*xfered_len
));
1286 if (retval
== TARGET_XFER_OK
&& myaddr
!= NULL
)
1290 fputs_unfiltered (", bytes =", gdb_stdlog
);
1291 for (i
= 0; i
< *xfered_len
; i
++)
1293 if ((((intptr_t) &(myaddr
[i
])) & 0xf) == 0)
1295 if (targetdebug
< 2 && i
> 0)
1297 fprintf_unfiltered (gdb_stdlog
, " ...");
1300 fprintf_unfiltered (gdb_stdlog
, "\n");
1303 fprintf_unfiltered (gdb_stdlog
, " %02x", myaddr
[i
] & 0xff);
1307 fputc_unfiltered ('\n', gdb_stdlog
);
1310 /* Check implementations of to_xfer_partial update *XFERED_LEN
1311 properly. Do assertion after printing debug messages, so that we
1312 can find more clues on assertion failure from debugging messages. */
1313 if (retval
== TARGET_XFER_OK
|| retval
== TARGET_XFER_UNAVAILABLE
)
1314 gdb_assert (*xfered_len
> 0);
1319 /* Read LEN bytes of target memory at address MEMADDR, placing the
1320 results in GDB's memory at MYADDR. Returns either 0 for success or
1321 -1 if any error occurs.
1323 If an error occurs, no guarantee is made about the contents of the data at
1324 MYADDR. In particular, the caller should not depend upon partial reads
1325 filling the buffer with good data. There is no way for the caller to know
1326 how much good data might have been transfered anyway. Callers that can
1327 deal with partial reads should call target_read (which will retry until
1328 it makes no progress, and then return how much was transferred). */
1331 target_read_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1333 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1334 myaddr
, memaddr
, len
) == len
)
1340 /* See target/target.h. */
1343 target_read_uint32 (CORE_ADDR memaddr
, uint32_t *result
)
1348 r
= target_read_memory (memaddr
, buf
, sizeof buf
);
1351 *result
= extract_unsigned_integer (buf
, sizeof buf
,
1352 gdbarch_byte_order (target_gdbarch ()));
1356 /* Like target_read_memory, but specify explicitly that this is a read
1357 from the target's raw memory. That is, this read bypasses the
1358 dcache, breakpoint shadowing, etc. */
1361 target_read_raw_memory (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1363 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1364 myaddr
, memaddr
, len
) == len
)
1370 /* Like target_read_memory, but specify explicitly that this is a read from
1371 the target's stack. This may trigger different cache behavior. */
1374 target_read_stack (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1376 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY
, NULL
,
1377 myaddr
, memaddr
, len
) == len
)
1383 /* Like target_read_memory, but specify explicitly that this is a read from
1384 the target's code. This may trigger different cache behavior. */
1387 target_read_code (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ssize_t len
)
1389 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY
, NULL
,
1390 myaddr
, memaddr
, len
) == len
)
1396 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1397 Returns either 0 for success or -1 if any error occurs. If an
1398 error occurs, no guarantee is made about how much data got written.
1399 Callers that can deal with partial writes should call
1403 target_write_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1405 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY
, NULL
,
1406 myaddr
, memaddr
, len
) == len
)
1412 /* Write LEN bytes from MYADDR to target raw memory at address
1413 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1414 If an error occurs, no guarantee is made about how much data got
1415 written. Callers that can deal with partial writes should call
1419 target_write_raw_memory (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ssize_t len
)
1421 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY
, NULL
,
1422 myaddr
, memaddr
, len
) == len
)
1428 /* Fetch the target's memory map. */
1430 std::vector
<mem_region
>
1431 target_memory_map (void)
1433 std::vector
<mem_region
> result
= current_top_target ()->memory_map ();
1434 if (result
.empty ())
1437 std::sort (result
.begin (), result
.end ());
1439 /* Check that regions do not overlap. Simultaneously assign
1440 a numbering for the "mem" commands to use to refer to
1442 mem_region
*last_one
= NULL
;
1443 for (size_t ix
= 0; ix
< result
.size (); ix
++)
1445 mem_region
*this_one
= &result
[ix
];
1446 this_one
->number
= ix
;
1448 if (last_one
!= NULL
&& last_one
->hi
> this_one
->lo
)
1450 warning (_("Overlapping regions in memory map: ignoring"));
1451 return std::vector
<mem_region
> ();
1454 last_one
= this_one
;
1461 target_flash_erase (ULONGEST address
, LONGEST length
)
1463 current_top_target ()->flash_erase (address
, length
);
1467 target_flash_done (void)
1469 current_top_target ()->flash_done ();
1473 show_trust_readonly (struct ui_file
*file
, int from_tty
,
1474 struct cmd_list_element
*c
, const char *value
)
1476 fprintf_filtered (file
,
1477 _("Mode for reading from readonly sections is %s.\n"),
1481 /* Target vector read/write partial wrapper functions. */
1483 static enum target_xfer_status
1484 target_read_partial (struct target_ops
*ops
,
1485 enum target_object object
,
1486 const char *annex
, gdb_byte
*buf
,
1487 ULONGEST offset
, ULONGEST len
,
1488 ULONGEST
*xfered_len
)
1490 return target_xfer_partial (ops
, object
, annex
, buf
, NULL
, offset
, len
,
1494 static enum target_xfer_status
1495 target_write_partial (struct target_ops
*ops
,
1496 enum target_object object
,
1497 const char *annex
, const gdb_byte
*buf
,
1498 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
)
1500 return target_xfer_partial (ops
, object
, annex
, NULL
, buf
, offset
, len
,
1504 /* Wrappers to perform the full transfer. */
1506 /* For docs on target_read see target.h. */
1509 target_read (struct target_ops
*ops
,
1510 enum target_object object
,
1511 const char *annex
, gdb_byte
*buf
,
1512 ULONGEST offset
, LONGEST len
)
1514 LONGEST xfered_total
= 0;
1517 /* If we are reading from a memory object, find the length of an addressable
1518 unit for that architecture. */
1519 if (object
== TARGET_OBJECT_MEMORY
1520 || object
== TARGET_OBJECT_STACK_MEMORY
1521 || object
== TARGET_OBJECT_CODE_MEMORY
1522 || object
== TARGET_OBJECT_RAW_MEMORY
)
1523 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1525 while (xfered_total
< len
)
1527 ULONGEST xfered_partial
;
1528 enum target_xfer_status status
;
1530 status
= target_read_partial (ops
, object
, annex
,
1531 buf
+ xfered_total
* unit_size
,
1532 offset
+ xfered_total
, len
- xfered_total
,
1535 /* Call an observer, notifying them of the xfer progress? */
1536 if (status
== TARGET_XFER_EOF
)
1537 return xfered_total
;
1538 else if (status
== TARGET_XFER_OK
)
1540 xfered_total
+= xfered_partial
;
1544 return TARGET_XFER_E_IO
;
1550 /* Assuming that the entire [begin, end) range of memory cannot be
1551 read, try to read whatever subrange is possible to read.
1553 The function returns, in RESULT, either zero or one memory block.
1554 If there's a readable subrange at the beginning, it is completely
1555 read and returned. Any further readable subrange will not be read.
1556 Otherwise, if there's a readable subrange at the end, it will be
1557 completely read and returned. Any readable subranges before it
1558 (obviously, not starting at the beginning), will be ignored. In
1559 other cases -- either no readable subrange, or readable subrange(s)
1560 that is neither at the beginning, or end, nothing is returned.
1562 The purpose of this function is to handle a read across a boundary
1563 of accessible memory in a case when memory map is not available.
1564 The above restrictions are fine for this case, but will give
1565 incorrect results if the memory is 'patchy'. However, supporting
1566 'patchy' memory would require trying to read every single byte,
1567 and it seems unacceptable solution. Explicit memory map is
1568 recommended for this case -- and target_read_memory_robust will
1569 take care of reading multiple ranges then. */
1572 read_whatever_is_readable (struct target_ops
*ops
,
1573 const ULONGEST begin
, const ULONGEST end
,
1575 std::vector
<memory_read_result
> *result
)
1577 ULONGEST current_begin
= begin
;
1578 ULONGEST current_end
= end
;
1580 ULONGEST xfered_len
;
1582 /* If we previously failed to read 1 byte, nothing can be done here. */
1583 if (end
- begin
<= 1)
1586 gdb::unique_xmalloc_ptr
<gdb_byte
> buf ((gdb_byte
*) xmalloc (end
- begin
));
1588 /* Check that either first or the last byte is readable, and give up
1589 if not. This heuristic is meant to permit reading accessible memory
1590 at the boundary of accessible region. */
1591 if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1592 buf
.get (), begin
, 1, &xfered_len
) == TARGET_XFER_OK
)
1597 else if (target_read_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1598 buf
.get () + (end
- begin
) - 1, end
- 1, 1,
1599 &xfered_len
) == TARGET_XFER_OK
)
1607 /* Loop invariant is that the [current_begin, current_end) was previously
1608 found to be not readable as a whole.
1610 Note loop condition -- if the range has 1 byte, we can't divide the range
1611 so there's no point trying further. */
1612 while (current_end
- current_begin
> 1)
1614 ULONGEST first_half_begin
, first_half_end
;
1615 ULONGEST second_half_begin
, second_half_end
;
1617 ULONGEST middle
= current_begin
+ (current_end
- current_begin
) / 2;
1621 first_half_begin
= current_begin
;
1622 first_half_end
= middle
;
1623 second_half_begin
= middle
;
1624 second_half_end
= current_end
;
1628 first_half_begin
= middle
;
1629 first_half_end
= current_end
;
1630 second_half_begin
= current_begin
;
1631 second_half_end
= middle
;
1634 xfer
= target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
1635 buf
.get () + (first_half_begin
- begin
) * unit_size
,
1637 first_half_end
- first_half_begin
);
1639 if (xfer
== first_half_end
- first_half_begin
)
1641 /* This half reads up fine. So, the error must be in the
1643 current_begin
= second_half_begin
;
1644 current_end
= second_half_end
;
1648 /* This half is not readable. Because we've tried one byte, we
1649 know some part of this half if actually readable. Go to the next
1650 iteration to divide again and try to read.
1652 We don't handle the other half, because this function only tries
1653 to read a single readable subrange. */
1654 current_begin
= first_half_begin
;
1655 current_end
= first_half_end
;
1661 /* The [begin, current_begin) range has been read. */
1662 result
->emplace_back (begin
, current_end
, std::move (buf
));
1666 /* The [current_end, end) range has been read. */
1667 LONGEST region_len
= end
- current_end
;
1669 gdb::unique_xmalloc_ptr
<gdb_byte
> data
1670 ((gdb_byte
*) xmalloc (region_len
* unit_size
));
1671 memcpy (data
.get (), buf
.get () + (current_end
- begin
) * unit_size
,
1672 region_len
* unit_size
);
1673 result
->emplace_back (current_end
, end
, std::move (data
));
1677 std::vector
<memory_read_result
>
1678 read_memory_robust (struct target_ops
*ops
,
1679 const ULONGEST offset
, const LONGEST len
)
1681 std::vector
<memory_read_result
> result
;
1682 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1684 LONGEST xfered_total
= 0;
1685 while (xfered_total
< len
)
1687 struct mem_region
*region
= lookup_mem_region (offset
+ xfered_total
);
1690 /* If there is no explicit region, a fake one should be created. */
1691 gdb_assert (region
);
1693 if (region
->hi
== 0)
1694 region_len
= len
- xfered_total
;
1696 region_len
= region
->hi
- offset
;
1698 if (region
->attrib
.mode
== MEM_NONE
|| region
->attrib
.mode
== MEM_WO
)
1700 /* Cannot read this region. Note that we can end up here only
1701 if the region is explicitly marked inaccessible, or
1702 'inaccessible-by-default' is in effect. */
1703 xfered_total
+= region_len
;
1707 LONGEST to_read
= std::min (len
- xfered_total
, region_len
);
1708 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
1709 ((gdb_byte
*) xmalloc (to_read
* unit_size
));
1711 LONGEST xfered_partial
=
1712 target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
, buffer
.get (),
1713 offset
+ xfered_total
, to_read
);
1714 /* Call an observer, notifying them of the xfer progress? */
1715 if (xfered_partial
<= 0)
1717 /* Got an error reading full chunk. See if maybe we can read
1719 read_whatever_is_readable (ops
, offset
+ xfered_total
,
1720 offset
+ xfered_total
+ to_read
,
1721 unit_size
, &result
);
1722 xfered_total
+= to_read
;
1726 result
.emplace_back (offset
+ xfered_total
,
1727 offset
+ xfered_total
+ xfered_partial
,
1728 std::move (buffer
));
1729 xfered_total
+= xfered_partial
;
1739 /* An alternative to target_write with progress callbacks. */
1742 target_write_with_progress (struct target_ops
*ops
,
1743 enum target_object object
,
1744 const char *annex
, const gdb_byte
*buf
,
1745 ULONGEST offset
, LONGEST len
,
1746 void (*progress
) (ULONGEST
, void *), void *baton
)
1748 LONGEST xfered_total
= 0;
1751 /* If we are writing to a memory object, find the length of an addressable
1752 unit for that architecture. */
1753 if (object
== TARGET_OBJECT_MEMORY
1754 || object
== TARGET_OBJECT_STACK_MEMORY
1755 || object
== TARGET_OBJECT_CODE_MEMORY
1756 || object
== TARGET_OBJECT_RAW_MEMORY
)
1757 unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
1759 /* Give the progress callback a chance to set up. */
1761 (*progress
) (0, baton
);
1763 while (xfered_total
< len
)
1765 ULONGEST xfered_partial
;
1766 enum target_xfer_status status
;
1768 status
= target_write_partial (ops
, object
, annex
,
1769 buf
+ xfered_total
* unit_size
,
1770 offset
+ xfered_total
, len
- xfered_total
,
1773 if (status
!= TARGET_XFER_OK
)
1774 return status
== TARGET_XFER_EOF
? xfered_total
: TARGET_XFER_E_IO
;
1777 (*progress
) (xfered_partial
, baton
);
1779 xfered_total
+= xfered_partial
;
1785 /* For docs on target_write see target.h. */
1788 target_write (struct target_ops
*ops
,
1789 enum target_object object
,
1790 const char *annex
, const gdb_byte
*buf
,
1791 ULONGEST offset
, LONGEST len
)
1793 return target_write_with_progress (ops
, object
, annex
, buf
, offset
, len
,
1797 /* Help for target_read_alloc and target_read_stralloc. See their comments
1800 template <typename T
>
1801 gdb::optional
<gdb::def_vector
<T
>>
1802 target_read_alloc_1 (struct target_ops
*ops
, enum target_object object
,
1805 gdb::def_vector
<T
> buf
;
1807 const int chunk
= 4096;
1809 /* This function does not have a length parameter; it reads the
1810 entire OBJECT). Also, it doesn't support objects fetched partly
1811 from one target and partly from another (in a different stratum,
1812 e.g. a core file and an executable). Both reasons make it
1813 unsuitable for reading memory. */
1814 gdb_assert (object
!= TARGET_OBJECT_MEMORY
);
1816 /* Start by reading up to 4K at a time. The target will throttle
1817 this number down if necessary. */
1820 ULONGEST xfered_len
;
1821 enum target_xfer_status status
;
1823 buf
.resize (buf_pos
+ chunk
);
1825 status
= target_read_partial (ops
, object
, annex
,
1826 (gdb_byte
*) &buf
[buf_pos
],
1830 if (status
== TARGET_XFER_EOF
)
1832 /* Read all there was. */
1833 buf
.resize (buf_pos
);
1836 else if (status
!= TARGET_XFER_OK
)
1838 /* An error occurred. */
1842 buf_pos
+= xfered_len
;
1850 gdb::optional
<gdb::byte_vector
>
1851 target_read_alloc (struct target_ops
*ops
, enum target_object object
,
1854 return target_read_alloc_1
<gdb_byte
> (ops
, object
, annex
);
1859 gdb::optional
<gdb::char_vector
>
1860 target_read_stralloc (struct target_ops
*ops
, enum target_object object
,
1863 gdb::optional
<gdb::char_vector
> buf
1864 = target_read_alloc_1
<char> (ops
, object
, annex
);
1869 if (buf
->back () != '\0')
1870 buf
->push_back ('\0');
1872 /* Check for embedded NUL bytes; but allow trailing NULs. */
1873 for (auto it
= std::find (buf
->begin (), buf
->end (), '\0');
1874 it
!= buf
->end (); it
++)
1877 warning (_("target object %d, annex %s, "
1878 "contained unexpected null characters"),
1879 (int) object
, annex
? annex
: "(none)");
1886 /* Memory transfer methods. */
1889 get_target_memory (struct target_ops
*ops
, CORE_ADDR addr
, gdb_byte
*buf
,
1892 /* This method is used to read from an alternate, non-current
1893 target. This read must bypass the overlay support (as symbols
1894 don't match this target), and GDB's internal cache (wrong cache
1895 for this target). */
1896 if (target_read (ops
, TARGET_OBJECT_RAW_MEMORY
, NULL
, buf
, addr
, len
)
1898 memory_error (TARGET_XFER_E_IO
, addr
);
1902 get_target_memory_unsigned (struct target_ops
*ops
, CORE_ADDR addr
,
1903 int len
, enum bfd_endian byte_order
)
1905 gdb_byte buf
[sizeof (ULONGEST
)];
1907 gdb_assert (len
<= sizeof (buf
));
1908 get_target_memory (ops
, addr
, buf
, len
);
1909 return extract_unsigned_integer (buf
, len
, byte_order
);
1915 target_insert_breakpoint (struct gdbarch
*gdbarch
,
1916 struct bp_target_info
*bp_tgt
)
1918 if (!may_insert_breakpoints
)
1920 warning (_("May not insert breakpoints"));
1924 return current_top_target ()->insert_breakpoint (gdbarch
, bp_tgt
);
1930 target_remove_breakpoint (struct gdbarch
*gdbarch
,
1931 struct bp_target_info
*bp_tgt
,
1932 enum remove_bp_reason reason
)
1934 /* This is kind of a weird case to handle, but the permission might
1935 have been changed after breakpoints were inserted - in which case
1936 we should just take the user literally and assume that any
1937 breakpoints should be left in place. */
1938 if (!may_insert_breakpoints
)
1940 warning (_("May not remove breakpoints"));
1944 return current_top_target ()->remove_breakpoint (gdbarch
, bp_tgt
, reason
);
1948 info_target_command (const char *args
, int from_tty
)
1950 int has_all_mem
= 0;
1952 if (symfile_objfile
!= NULL
)
1953 printf_unfiltered (_("Symbols from \"%s\".\n"),
1954 objfile_name (symfile_objfile
));
1956 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
1958 if (!t
->has_memory ())
1961 if ((int) (t
->to_stratum
) <= (int) dummy_stratum
)
1964 printf_unfiltered (_("\tWhile running this, "
1965 "GDB does not access memory from...\n"));
1966 printf_unfiltered ("%s:\n", t
->longname ());
1968 has_all_mem
= t
->has_all_memory ();
1972 /* This function is called before any new inferior is created, e.g.
1973 by running a program, attaching, or connecting to a target.
1974 It cleans up any state from previous invocations which might
1975 change between runs. This is a subset of what target_preopen
1976 resets (things which might change between targets). */
1979 target_pre_inferior (int from_tty
)
1981 /* Clear out solib state. Otherwise the solib state of the previous
1982 inferior might have survived and is entirely wrong for the new
1983 target. This has been observed on GNU/Linux using glibc 2.3. How
1995 Cannot access memory at address 0xdeadbeef
1998 /* In some OSs, the shared library list is the same/global/shared
1999 across inferiors. If code is shared between processes, so are
2000 memory regions and features. */
2001 if (!gdbarch_has_global_solist (target_gdbarch ()))
2003 no_shared_libraries (NULL
, from_tty
);
2005 invalidate_target_mem_regions ();
2007 target_clear_description ();
2010 /* attach_flag may be set if the previous process associated with
2011 the inferior was attached to. */
2012 current_inferior ()->attach_flag
= 0;
2014 current_inferior ()->highest_thread_num
= 0;
2016 agent_capability_invalidate ();
2019 /* Callback for iterate_over_inferiors. Gets rid of the given
2023 dispose_inferior (struct inferior
*inf
, void *args
)
2025 /* Not all killed inferiors can, or will ever be, removed from the
2026 inferior list. Killed inferiors clearly don't need to be killed
2027 again, so, we're done. */
2031 thread_info
*thread
= any_thread_of_inferior (inf
);
2034 switch_to_thread (thread
);
2036 /* Core inferiors actually should be detached, not killed. */
2037 if (target_has_execution
)
2040 target_detach (inf
, 0);
2046 /* This is to be called by the open routine before it does
2050 target_preopen (int from_tty
)
2054 if (have_inferiors ())
2057 || !have_live_inferiors ()
2058 || query (_("A program is being debugged already. Kill it? ")))
2059 iterate_over_inferiors (dispose_inferior
, NULL
);
2061 error (_("Program not killed."));
2064 /* Calling target_kill may remove the target from the stack. But if
2065 it doesn't (which seems like a win for UDI), remove it now. */
2066 /* Leave the exec target, though. The user may be switching from a
2067 live process to a core of the same program. */
2068 pop_all_targets_above (file_stratum
);
2070 target_pre_inferior (from_tty
);
2076 target_detach (inferior
*inf
, int from_tty
)
2078 /* As long as some to_detach implementations rely on the current_inferior
2079 (either directly, or indirectly, like through target_gdbarch or by
2080 reading memory), INF needs to be the current inferior. When that
2081 requirement will become no longer true, then we can remove this
2083 gdb_assert (inf
== current_inferior ());
2085 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2086 /* Don't remove global breakpoints here. They're removed on
2087 disconnection from the target. */
2090 /* If we're in breakpoints-always-inserted mode, have to remove
2091 breakpoints before detaching. */
2092 remove_breakpoints_inf (current_inferior ());
2094 prepare_for_detach ();
2096 current_top_target ()->detach (inf
, from_tty
);
2100 target_disconnect (const char *args
, int from_tty
)
2102 /* If we're in breakpoints-always-inserted mode or if breakpoints
2103 are global across processes, we have to remove them before
2105 remove_breakpoints ();
2107 current_top_target ()->disconnect (args
, from_tty
);
2110 /* See target/target.h. */
2113 target_wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
2115 return current_top_target ()->wait (ptid
, status
, options
);
2121 default_target_wait (struct target_ops
*ops
,
2122 ptid_t ptid
, struct target_waitstatus
*status
,
2125 status
->kind
= TARGET_WAITKIND_IGNORE
;
2126 return minus_one_ptid
;
2130 target_pid_to_str (ptid_t ptid
)
2132 return current_top_target ()->pid_to_str (ptid
);
2136 target_thread_name (struct thread_info
*info
)
2138 return current_top_target ()->thread_name (info
);
2141 struct thread_info
*
2142 target_thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
2144 struct inferior
*inf
)
2146 return current_top_target ()->thread_handle_to_thread_info (thread_handle
,
2151 target_resume (ptid_t ptid
, int step
, enum gdb_signal signal
)
2153 target_dcache_invalidate ();
2155 current_top_target ()->resume (ptid
, step
, signal
);
2157 registers_changed_ptid (ptid
);
2158 /* We only set the internal executing state here. The user/frontend
2159 running state is set at a higher level. This also clears the
2160 thread's stop_pc as side effect. */
2161 set_executing (ptid
, 1);
2162 clear_inline_frame_state (ptid
);
2165 /* If true, target_commit_resume is a nop. */
2166 static int defer_target_commit_resume
;
2171 target_commit_resume (void)
2173 if (defer_target_commit_resume
)
2176 current_top_target ()->commit_resume ();
2181 scoped_restore_tmpl
<int>
2182 make_scoped_defer_target_commit_resume ()
2184 return make_scoped_restore (&defer_target_commit_resume
, 1);
2188 target_pass_signals (int numsigs
, unsigned char *pass_signals
)
2190 current_top_target ()->pass_signals (numsigs
, pass_signals
);
2194 target_program_signals (int numsigs
, unsigned char *program_signals
)
2196 current_top_target ()->program_signals (numsigs
, program_signals
);
2200 default_follow_fork (struct target_ops
*self
, int follow_child
,
2203 /* Some target returned a fork event, but did not know how to follow it. */
2204 internal_error (__FILE__
, __LINE__
,
2205 _("could not find a target to follow fork"));
2208 /* Look through the list of possible targets for a target that can
2212 target_follow_fork (int follow_child
, int detach_fork
)
2214 return current_top_target ()->follow_fork (follow_child
, detach_fork
);
2217 /* Target wrapper for follow exec hook. */
2220 target_follow_exec (struct inferior
*inf
, char *execd_pathname
)
2222 current_top_target ()->follow_exec (inf
, execd_pathname
);
2226 default_mourn_inferior (struct target_ops
*self
)
2228 internal_error (__FILE__
, __LINE__
,
2229 _("could not find a target to follow mourn inferior"));
2233 target_mourn_inferior (ptid_t ptid
)
2235 gdb_assert (ptid
== inferior_ptid
);
2236 current_top_target ()->mourn_inferior ();
2238 /* We no longer need to keep handles on any of the object files.
2239 Make sure to release them to avoid unnecessarily locking any
2240 of them while we're not actually debugging. */
2241 bfd_cache_close_all ();
2244 /* Look for a target which can describe architectural features, starting
2245 from TARGET. If we find one, return its description. */
2247 const struct target_desc
*
2248 target_read_description (struct target_ops
*target
)
2250 return target
->read_description ();
2253 /* This implements a basic search of memory, reading target memory and
2254 performing the search here (as opposed to performing the search in on the
2255 target side with, for example, gdbserver). */
2258 simple_search_memory (struct target_ops
*ops
,
2259 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2260 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2261 CORE_ADDR
*found_addrp
)
2263 /* NOTE: also defined in find.c testcase. */
2264 #define SEARCH_CHUNK_SIZE 16000
2265 const unsigned chunk_size
= SEARCH_CHUNK_SIZE
;
2266 /* Buffer to hold memory contents for searching. */
2267 unsigned search_buf_size
;
2269 search_buf_size
= chunk_size
+ pattern_len
- 1;
2271 /* No point in trying to allocate a buffer larger than the search space. */
2272 if (search_space_len
< search_buf_size
)
2273 search_buf_size
= search_space_len
;
2275 gdb::byte_vector
search_buf (search_buf_size
);
2277 /* Prime the search buffer. */
2279 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2280 search_buf
.data (), start_addr
, search_buf_size
)
2283 warning (_("Unable to access %s bytes of target "
2284 "memory at %s, halting search."),
2285 pulongest (search_buf_size
), hex_string (start_addr
));
2289 /* Perform the search.
2291 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2292 When we've scanned N bytes we copy the trailing bytes to the start and
2293 read in another N bytes. */
2295 while (search_space_len
>= pattern_len
)
2297 gdb_byte
*found_ptr
;
2298 unsigned nr_search_bytes
2299 = std::min (search_space_len
, (ULONGEST
) search_buf_size
);
2301 found_ptr
= (gdb_byte
*) memmem (search_buf
.data (), nr_search_bytes
,
2302 pattern
, pattern_len
);
2304 if (found_ptr
!= NULL
)
2306 CORE_ADDR found_addr
= start_addr
+ (found_ptr
- search_buf
.data ());
2308 *found_addrp
= found_addr
;
2312 /* Not found in this chunk, skip to next chunk. */
2314 /* Don't let search_space_len wrap here, it's unsigned. */
2315 if (search_space_len
>= chunk_size
)
2316 search_space_len
-= chunk_size
;
2318 search_space_len
= 0;
2320 if (search_space_len
>= pattern_len
)
2322 unsigned keep_len
= search_buf_size
- chunk_size
;
2323 CORE_ADDR read_addr
= start_addr
+ chunk_size
+ keep_len
;
2326 /* Copy the trailing part of the previous iteration to the front
2327 of the buffer for the next iteration. */
2328 gdb_assert (keep_len
== pattern_len
- 1);
2329 memcpy (&search_buf
[0], &search_buf
[chunk_size
], keep_len
);
2331 nr_to_read
= std::min (search_space_len
- keep_len
,
2332 (ULONGEST
) chunk_size
);
2334 if (target_read (ops
, TARGET_OBJECT_MEMORY
, NULL
,
2335 &search_buf
[keep_len
], read_addr
,
2336 nr_to_read
) != nr_to_read
)
2338 warning (_("Unable to access %s bytes of target "
2339 "memory at %s, halting search."),
2340 plongest (nr_to_read
),
2341 hex_string (read_addr
));
2345 start_addr
+= chunk_size
;
2354 /* Default implementation of memory-searching. */
2357 default_search_memory (struct target_ops
*self
,
2358 CORE_ADDR start_addr
, ULONGEST search_space_len
,
2359 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2360 CORE_ADDR
*found_addrp
)
2362 /* Start over from the top of the target stack. */
2363 return simple_search_memory (current_top_target (),
2364 start_addr
, search_space_len
,
2365 pattern
, pattern_len
, found_addrp
);
2368 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2369 sequence of bytes in PATTERN with length PATTERN_LEN.
2371 The result is 1 if found, 0 if not found, and -1 if there was an error
2372 requiring halting of the search (e.g. memory read error).
2373 If the pattern is found the address is recorded in FOUND_ADDRP. */
2376 target_search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
2377 const gdb_byte
*pattern
, ULONGEST pattern_len
,
2378 CORE_ADDR
*found_addrp
)
2380 return current_top_target ()->search_memory (start_addr
, search_space_len
,
2381 pattern
, pattern_len
, found_addrp
);
2384 /* Look through the currently pushed targets. If none of them will
2385 be able to restart the currently running process, issue an error
2389 target_require_runnable (void)
2391 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2393 /* If this target knows how to create a new program, then
2394 assume we will still be able to after killing the current
2395 one. Either killing and mourning will not pop T, or else
2396 find_default_run_target will find it again. */
2397 if (t
->can_create_inferior ())
2400 /* Do not worry about targets at certain strata that can not
2401 create inferiors. Assume they will be pushed again if
2402 necessary, and continue to the process_stratum. */
2403 if (t
->to_stratum
> process_stratum
)
2406 error (_("The \"%s\" target does not support \"run\". "
2407 "Try \"help target\" or \"continue\"."),
2411 /* This function is only called if the target is running. In that
2412 case there should have been a process_stratum target and it
2413 should either know how to create inferiors, or not... */
2414 internal_error (__FILE__
, __LINE__
, _("No targets found"));
2417 /* Whether GDB is allowed to fall back to the default run target for
2418 "run", "attach", etc. when no target is connected yet. */
2419 static int auto_connect_native_target
= 1;
2422 show_auto_connect_native_target (struct ui_file
*file
, int from_tty
,
2423 struct cmd_list_element
*c
, const char *value
)
2425 fprintf_filtered (file
,
2426 _("Whether GDB may automatically connect to the "
2427 "native target is %s.\n"),
2431 /* A pointer to the target that can respond to "run" or "attach".
2432 Native targets are always singletons and instantiated early at GDB
2434 static target_ops
*the_native_target
;
2439 set_native_target (target_ops
*target
)
2441 if (the_native_target
!= NULL
)
2442 internal_error (__FILE__
, __LINE__
,
2443 _("native target already set (\"%s\")."),
2444 the_native_target
->longname ());
2446 the_native_target
= target
;
2452 get_native_target ()
2454 return the_native_target
;
2457 /* Look through the list of possible targets for a target that can
2458 execute a run or attach command without any other data. This is
2459 used to locate the default process stratum.
2461 If DO_MESG is not NULL, the result is always valid (error() is
2462 called for errors); else, return NULL on error. */
2464 static struct target_ops
*
2465 find_default_run_target (const char *do_mesg
)
2467 if (auto_connect_native_target
&& the_native_target
!= NULL
)
2468 return the_native_target
;
2470 if (do_mesg
!= NULL
)
2471 error (_("Don't know how to %s. Try \"help target\"."), do_mesg
);
2478 find_attach_target (void)
2480 /* If a target on the current stack can attach, use it. */
2481 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2483 if (t
->can_attach ())
2487 /* Otherwise, use the default run target for attaching. */
2488 return find_default_run_target ("attach");
2494 find_run_target (void)
2496 /* If a target on the current stack can run, use it. */
2497 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2499 if (t
->can_create_inferior ())
2503 /* Otherwise, use the default run target. */
2504 return find_default_run_target ("run");
2508 target_ops::info_proc (const char *args
, enum info_proc_what what
)
2513 /* Implement the "info proc" command. */
2516 target_info_proc (const char *args
, enum info_proc_what what
)
2518 struct target_ops
*t
;
2520 /* If we're already connected to something that can get us OS
2521 related data, use it. Otherwise, try using the native
2523 t
= find_target_at (process_stratum
);
2525 t
= find_default_run_target (NULL
);
2527 for (; t
!= NULL
; t
= t
->beneath ())
2529 if (t
->info_proc (args
, what
))
2532 fprintf_unfiltered (gdb_stdlog
,
2533 "target_info_proc (\"%s\", %d)\n", args
, what
);
2543 find_default_supports_disable_randomization (struct target_ops
*self
)
2545 struct target_ops
*t
;
2547 t
= find_default_run_target (NULL
);
2549 return t
->supports_disable_randomization ();
2554 target_supports_disable_randomization (void)
2556 return current_top_target ()->supports_disable_randomization ();
2559 /* See target/target.h. */
2562 target_supports_multi_process (void)
2564 return current_top_target ()->supports_multi_process ();
2569 gdb::optional
<gdb::char_vector
>
2570 target_get_osdata (const char *type
)
2572 struct target_ops
*t
;
2574 /* If we're already connected to something that can get us OS
2575 related data, use it. Otherwise, try using the native
2577 t
= find_target_at (process_stratum
);
2579 t
= find_default_run_target ("get OS data");
2584 return target_read_stralloc (t
, TARGET_OBJECT_OSDATA
, type
);
2587 static struct address_space
*
2588 default_thread_address_space (struct target_ops
*self
, ptid_t ptid
)
2590 struct inferior
*inf
;
2592 /* Fall-back to the "main" address space of the inferior. */
2593 inf
= find_inferior_ptid (ptid
);
2595 if (inf
== NULL
|| inf
->aspace
== NULL
)
2596 internal_error (__FILE__
, __LINE__
,
2597 _("Can't determine the current "
2598 "address space of thread %s\n"),
2599 target_pid_to_str (ptid
));
2604 /* Determine the current address space of thread PTID. */
2606 struct address_space
*
2607 target_thread_address_space (ptid_t ptid
)
2609 struct address_space
*aspace
;
2611 aspace
= current_top_target ()->thread_address_space (ptid
);
2612 gdb_assert (aspace
!= NULL
);
2620 target_ops::beneath () const
2622 return g_target_stack
.find_beneath (this);
2626 target_ops::close ()
2631 target_ops::can_attach ()
2637 target_ops::attach (const char *, int)
2639 gdb_assert_not_reached ("target_ops::attach called");
2643 target_ops::can_create_inferior ()
2649 target_ops::create_inferior (const char *, const std::string
&,
2652 gdb_assert_not_reached ("target_ops::create_inferior called");
2656 target_ops::can_run ()
2664 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
2673 /* Target file operations. */
2675 static struct target_ops
*
2676 default_fileio_target (void)
2678 struct target_ops
*t
;
2680 /* If we're already connected to something that can perform
2681 file I/O, use it. Otherwise, try using the native target. */
2682 t
= find_target_at (process_stratum
);
2685 return find_default_run_target ("file I/O");
2688 /* File handle for target file operations. */
2692 /* The target on which this file is open. NULL if the target is
2693 meanwhile closed while the handle is open. */
2696 /* The file descriptor on the target. */
2699 /* Check whether this fileio_fh_t represents a closed file. */
2702 return target_fd
< 0;
2706 /* Vector of currently open file handles. The value returned by
2707 target_fileio_open and passed as the FD argument to other
2708 target_fileio_* functions is an index into this vector. This
2709 vector's entries are never freed; instead, files are marked as
2710 closed, and the handle becomes available for reuse. */
2711 static std::vector
<fileio_fh_t
> fileio_fhandles
;
2713 /* Index into fileio_fhandles of the lowest handle that might be
2714 closed. This permits handle reuse without searching the whole
2715 list each time a new file is opened. */
2716 static int lowest_closed_fd
;
2718 /* Invalidate the target associated with open handles that were open
2719 on target TARG, since we're about to close (and maybe destroy) the
2720 target. The handles remain open from the client's perspective, but
2721 trying to do anything with them other than closing them will fail
2725 fileio_handles_invalidate_target (target_ops
*targ
)
2727 for (fileio_fh_t
&fh
: fileio_fhandles
)
2728 if (fh
.target
== targ
)
2732 /* Acquire a target fileio file descriptor. */
2735 acquire_fileio_fd (target_ops
*target
, int target_fd
)
2737 /* Search for closed handles to reuse. */
2738 for (; lowest_closed_fd
< fileio_fhandles
.size (); lowest_closed_fd
++)
2740 fileio_fh_t
&fh
= fileio_fhandles
[lowest_closed_fd
];
2742 if (fh
.is_closed ())
2746 /* Push a new handle if no closed handles were found. */
2747 if (lowest_closed_fd
== fileio_fhandles
.size ())
2748 fileio_fhandles
.push_back (fileio_fh_t
{target
, target_fd
});
2750 fileio_fhandles
[lowest_closed_fd
] = {target
, target_fd
};
2752 /* Should no longer be marked closed. */
2753 gdb_assert (!fileio_fhandles
[lowest_closed_fd
].is_closed ());
2755 /* Return its index, and start the next lookup at
2757 return lowest_closed_fd
++;
2760 /* Release a target fileio file descriptor. */
2763 release_fileio_fd (int fd
, fileio_fh_t
*fh
)
2766 lowest_closed_fd
= std::min (lowest_closed_fd
, fd
);
2769 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2771 static fileio_fh_t
*
2772 fileio_fd_to_fh (int fd
)
2774 return &fileio_fhandles
[fd
];
2778 /* Default implementations of file i/o methods. We don't want these
2779 to delegate automatically, because we need to know which target
2780 supported the method, in order to call it directly from within
2781 pread/pwrite, etc. */
2784 target_ops::fileio_open (struct inferior
*inf
, const char *filename
,
2785 int flags
, int mode
, int warn_if_slow
,
2788 *target_errno
= FILEIO_ENOSYS
;
2793 target_ops::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2794 ULONGEST offset
, int *target_errno
)
2796 *target_errno
= FILEIO_ENOSYS
;
2801 target_ops::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2802 ULONGEST offset
, int *target_errno
)
2804 *target_errno
= FILEIO_ENOSYS
;
2809 target_ops::fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2811 *target_errno
= FILEIO_ENOSYS
;
2816 target_ops::fileio_close (int fd
, int *target_errno
)
2818 *target_errno
= FILEIO_ENOSYS
;
2823 target_ops::fileio_unlink (struct inferior
*inf
, const char *filename
,
2826 *target_errno
= FILEIO_ENOSYS
;
2830 gdb::optional
<std::string
>
2831 target_ops::fileio_readlink (struct inferior
*inf
, const char *filename
,
2834 *target_errno
= FILEIO_ENOSYS
;
2838 /* Helper for target_fileio_open and
2839 target_fileio_open_warn_if_slow. */
2842 target_fileio_open_1 (struct inferior
*inf
, const char *filename
,
2843 int flags
, int mode
, int warn_if_slow
,
2846 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
2848 int fd
= t
->fileio_open (inf
, filename
, flags
, mode
,
2849 warn_if_slow
, target_errno
);
2851 if (fd
== -1 && *target_errno
== FILEIO_ENOSYS
)
2857 fd
= acquire_fileio_fd (t
, fd
);
2860 fprintf_unfiltered (gdb_stdlog
,
2861 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2863 inf
== NULL
? 0 : inf
->num
,
2864 filename
, flags
, mode
,
2866 fd
!= -1 ? 0 : *target_errno
);
2870 *target_errno
= FILEIO_ENOSYS
;
2877 target_fileio_open (struct inferior
*inf
, const char *filename
,
2878 int flags
, int mode
, int *target_errno
)
2880 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 0,
2887 target_fileio_open_warn_if_slow (struct inferior
*inf
,
2888 const char *filename
,
2889 int flags
, int mode
, int *target_errno
)
2891 return target_fileio_open_1 (inf
, filename
, flags
, mode
, 1,
2898 target_fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
2899 ULONGEST offset
, int *target_errno
)
2901 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2904 if (fh
->is_closed ())
2905 *target_errno
= EBADF
;
2906 else if (fh
->target
== NULL
)
2907 *target_errno
= EIO
;
2909 ret
= fh
->target
->fileio_pwrite (fh
->target_fd
, write_buf
,
2910 len
, offset
, target_errno
);
2913 fprintf_unfiltered (gdb_stdlog
,
2914 "target_fileio_pwrite (%d,...,%d,%s) "
2916 fd
, len
, pulongest (offset
),
2917 ret
, ret
!= -1 ? 0 : *target_errno
);
2924 target_fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
2925 ULONGEST offset
, int *target_errno
)
2927 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2930 if (fh
->is_closed ())
2931 *target_errno
= EBADF
;
2932 else if (fh
->target
== NULL
)
2933 *target_errno
= EIO
;
2935 ret
= fh
->target
->fileio_pread (fh
->target_fd
, read_buf
,
2936 len
, offset
, target_errno
);
2939 fprintf_unfiltered (gdb_stdlog
,
2940 "target_fileio_pread (%d,...,%d,%s) "
2942 fd
, len
, pulongest (offset
),
2943 ret
, ret
!= -1 ? 0 : *target_errno
);
2950 target_fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
)
2952 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2955 if (fh
->is_closed ())
2956 *target_errno
= EBADF
;
2957 else if (fh
->target
== NULL
)
2958 *target_errno
= EIO
;
2960 ret
= fh
->target
->fileio_fstat (fh
->target_fd
, sb
, target_errno
);
2963 fprintf_unfiltered (gdb_stdlog
,
2964 "target_fileio_fstat (%d) = %d (%d)\n",
2965 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2972 target_fileio_close (int fd
, int *target_errno
)
2974 fileio_fh_t
*fh
= fileio_fd_to_fh (fd
);
2977 if (fh
->is_closed ())
2978 *target_errno
= EBADF
;
2981 if (fh
->target
!= NULL
)
2982 ret
= fh
->target
->fileio_close (fh
->target_fd
,
2986 release_fileio_fd (fd
, fh
);
2990 fprintf_unfiltered (gdb_stdlog
,
2991 "target_fileio_close (%d) = %d (%d)\n",
2992 fd
, ret
, ret
!= -1 ? 0 : *target_errno
);
2999 target_fileio_unlink (struct inferior
*inf
, const char *filename
,
3002 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3004 int ret
= t
->fileio_unlink (inf
, filename
, target_errno
);
3006 if (ret
== -1 && *target_errno
== FILEIO_ENOSYS
)
3010 fprintf_unfiltered (gdb_stdlog
,
3011 "target_fileio_unlink (%d,%s)"
3013 inf
== NULL
? 0 : inf
->num
, filename
,
3014 ret
, ret
!= -1 ? 0 : *target_errno
);
3018 *target_errno
= FILEIO_ENOSYS
;
3024 gdb::optional
<std::string
>
3025 target_fileio_readlink (struct inferior
*inf
, const char *filename
,
3028 for (target_ops
*t
= default_fileio_target (); t
!= NULL
; t
= t
->beneath ())
3030 gdb::optional
<std::string
> ret
3031 = t
->fileio_readlink (inf
, filename
, target_errno
);
3033 if (!ret
.has_value () && *target_errno
== FILEIO_ENOSYS
)
3037 fprintf_unfiltered (gdb_stdlog
,
3038 "target_fileio_readlink (%d,%s)"
3040 inf
== NULL
? 0 : inf
->num
,
3041 filename
, ret
? ret
->c_str () : "(nil)",
3042 ret
? 0 : *target_errno
);
3046 *target_errno
= FILEIO_ENOSYS
;
3050 /* Like scoped_fd, but specific to target fileio. */
3052 class scoped_target_fd
3055 explicit scoped_target_fd (int fd
) noexcept
3060 ~scoped_target_fd ()
3066 target_fileio_close (m_fd
, &target_errno
);
3070 DISABLE_COPY_AND_ASSIGN (scoped_target_fd
);
3072 int get () const noexcept
3081 /* Read target file FILENAME, in the filesystem as seen by INF. If
3082 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3083 remote targets, the remote stub). Store the result in *BUF_P and
3084 return the size of the transferred data. PADDING additional bytes
3085 are available in *BUF_P. This is a helper function for
3086 target_fileio_read_alloc; see the declaration of that function for
3087 more information. */
3090 target_fileio_read_alloc_1 (struct inferior
*inf
, const char *filename
,
3091 gdb_byte
**buf_p
, int padding
)
3093 size_t buf_alloc
, buf_pos
;
3098 scoped_target_fd
fd (target_fileio_open (inf
, filename
, FILEIO_O_RDONLY
,
3099 0700, &target_errno
));
3100 if (fd
.get () == -1)
3103 /* Start by reading up to 4K at a time. The target will throttle
3104 this number down if necessary. */
3106 buf
= (gdb_byte
*) xmalloc (buf_alloc
);
3110 n
= target_fileio_pread (fd
.get (), &buf
[buf_pos
],
3111 buf_alloc
- buf_pos
- padding
, buf_pos
,
3115 /* An error occurred. */
3121 /* Read all there was. */
3131 /* If the buffer is filling up, expand it. */
3132 if (buf_alloc
< buf_pos
* 2)
3135 buf
= (gdb_byte
*) xrealloc (buf
, buf_alloc
);
3145 target_fileio_read_alloc (struct inferior
*inf
, const char *filename
,
3148 return target_fileio_read_alloc_1 (inf
, filename
, buf_p
, 0);
3153 gdb::unique_xmalloc_ptr
<char>
3154 target_fileio_read_stralloc (struct inferior
*inf
, const char *filename
)
3158 LONGEST i
, transferred
;
3160 transferred
= target_fileio_read_alloc_1 (inf
, filename
, &buffer
, 1);
3161 bufstr
= (char *) buffer
;
3163 if (transferred
< 0)
3164 return gdb::unique_xmalloc_ptr
<char> (nullptr);
3166 if (transferred
== 0)
3167 return gdb::unique_xmalloc_ptr
<char> (xstrdup (""));
3169 bufstr
[transferred
] = 0;
3171 /* Check for embedded NUL bytes; but allow trailing NULs. */
3172 for (i
= strlen (bufstr
); i
< transferred
; i
++)
3175 warning (_("target file %s "
3176 "contained unexpected null characters"),
3181 return gdb::unique_xmalloc_ptr
<char> (bufstr
);
3186 default_region_ok_for_hw_watchpoint (struct target_ops
*self
,
3187 CORE_ADDR addr
, int len
)
3189 return (len
<= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT
);
3193 default_watchpoint_addr_within_range (struct target_ops
*target
,
3195 CORE_ADDR start
, int length
)
3197 return addr
>= start
&& addr
< start
+ length
;
3200 static struct gdbarch
*
3201 default_thread_architecture (struct target_ops
*ops
, ptid_t ptid
)
3203 inferior
*inf
= find_inferior_ptid (ptid
);
3204 gdb_assert (inf
!= NULL
);
3205 return inf
->gdbarch
;
3211 target_stack::find_beneath (const target_ops
*t
) const
3213 /* Look for a non-empty slot at stratum levels beneath T's. */
3214 for (int stratum
= t
->to_stratum
- 1; stratum
>= 0; --stratum
)
3215 if (m_stack
[stratum
] != NULL
)
3216 return m_stack
[stratum
];
3224 find_target_at (enum strata stratum
)
3226 return g_target_stack
.at (stratum
);
3234 target_announce_detach (int from_tty
)
3237 const char *exec_file
;
3242 exec_file
= get_exec_file (0);
3243 if (exec_file
== NULL
)
3246 pid
= inferior_ptid
.pid ();
3247 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
3248 target_pid_to_str (ptid_t (pid
)));
3249 gdb_flush (gdb_stdout
);
3252 /* The inferior process has died. Long live the inferior! */
3255 generic_mourn_inferior (void)
3257 inferior
*inf
= current_inferior ();
3259 inferior_ptid
= null_ptid
;
3261 /* Mark breakpoints uninserted in case something tries to delete a
3262 breakpoint while we delete the inferior's threads (which would
3263 fail, since the inferior is long gone). */
3264 mark_breakpoints_out ();
3267 exit_inferior (inf
);
3269 /* Note this wipes step-resume breakpoints, so needs to be done
3270 after exit_inferior, which ends up referencing the step-resume
3271 breakpoints through clear_thread_inferior_resources. */
3272 breakpoint_init_inferior (inf_exited
);
3274 registers_changed ();
3276 reopen_exec_file ();
3277 reinit_frame_cache ();
3279 if (deprecated_detach_hook
)
3280 deprecated_detach_hook ();
3283 /* Convert a normal process ID to a string. Returns the string in a
3287 normal_pid_to_str (ptid_t ptid
)
3289 static char buf
[32];
3291 xsnprintf (buf
, sizeof buf
, "process %d", ptid
.pid ());
3296 default_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
3298 return normal_pid_to_str (ptid
);
3301 /* Error-catcher for target_find_memory_regions. */
3303 dummy_find_memory_regions (struct target_ops
*self
,
3304 find_memory_region_ftype ignore1
, void *ignore2
)
3306 error (_("Command not implemented for this target."));
3310 /* Error-catcher for target_make_corefile_notes. */
3312 dummy_make_corefile_notes (struct target_ops
*self
,
3313 bfd
*ignore1
, int *ignore2
)
3315 error (_("Command not implemented for this target."));
3319 #include "target-delegates.c"
3322 static const target_info dummy_target_info
= {
3328 dummy_target::dummy_target ()
3330 to_stratum
= dummy_stratum
;
3333 debug_target::debug_target ()
3335 to_stratum
= debug_stratum
;
3339 dummy_target::info () const
3341 return dummy_target_info
;
3345 debug_target::info () const
3347 return beneath ()->info ();
3353 target_close (struct target_ops
*targ
)
3355 gdb_assert (!target_is_pushed (targ
));
3357 fileio_handles_invalidate_target (targ
);
3362 fprintf_unfiltered (gdb_stdlog
, "target_close ()\n");
3366 target_thread_alive (ptid_t ptid
)
3368 return current_top_target ()->thread_alive (ptid
);
3372 target_update_thread_list (void)
3374 current_top_target ()->update_thread_list ();
3378 target_stop (ptid_t ptid
)
3382 warning (_("May not interrupt or stop the target, ignoring attempt"));
3386 current_top_target ()->stop (ptid
);
3394 warning (_("May not interrupt or stop the target, ignoring attempt"));
3398 current_top_target ()->interrupt ();
3404 target_pass_ctrlc (void)
3406 current_top_target ()->pass_ctrlc ();
3412 default_target_pass_ctrlc (struct target_ops
*ops
)
3414 target_interrupt ();
3417 /* See target/target.h. */
3420 target_stop_and_wait (ptid_t ptid
)
3422 struct target_waitstatus status
;
3423 int was_non_stop
= non_stop
;
3428 memset (&status
, 0, sizeof (status
));
3429 target_wait (ptid
, &status
, 0);
3431 non_stop
= was_non_stop
;
3434 /* See target/target.h. */
3437 target_continue_no_signal (ptid_t ptid
)
3439 target_resume (ptid
, 0, GDB_SIGNAL_0
);
3442 /* See target/target.h. */
3445 target_continue (ptid_t ptid
, enum gdb_signal signal
)
3447 target_resume (ptid
, 0, signal
);
3450 /* Concatenate ELEM to LIST, a comma-separated list. */
3453 str_comma_list_concat_elem (std::string
*list
, const char *elem
)
3455 if (!list
->empty ())
3456 list
->append (", ");
3458 list
->append (elem
);
3461 /* Helper for target_options_to_string. If OPT is present in
3462 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3463 OPT is removed from TARGET_OPTIONS. */
3466 do_option (int *target_options
, std::string
*ret
,
3467 int opt
, const char *opt_str
)
3469 if ((*target_options
& opt
) != 0)
3471 str_comma_list_concat_elem (ret
, opt_str
);
3472 *target_options
&= ~opt
;
3479 target_options_to_string (int target_options
)
3483 #define DO_TARG_OPTION(OPT) \
3484 do_option (&target_options, &ret, OPT, #OPT)
3486 DO_TARG_OPTION (TARGET_WNOHANG
);
3488 if (target_options
!= 0)
3489 str_comma_list_concat_elem (&ret
, "unknown???");
3495 target_fetch_registers (struct regcache
*regcache
, int regno
)
3497 current_top_target ()->fetch_registers (regcache
, regno
);
3499 regcache
->debug_print_register ("target_fetch_registers", regno
);
3503 target_store_registers (struct regcache
*regcache
, int regno
)
3505 if (!may_write_registers
)
3506 error (_("Writing to registers is not allowed (regno %d)"), regno
);
3508 current_top_target ()->store_registers (regcache
, regno
);
3511 regcache
->debug_print_register ("target_store_registers", regno
);
3516 target_core_of_thread (ptid_t ptid
)
3518 return current_top_target ()->core_of_thread (ptid
);
3522 simple_verify_memory (struct target_ops
*ops
,
3523 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
3525 LONGEST total_xfered
= 0;
3527 while (total_xfered
< size
)
3529 ULONGEST xfered_len
;
3530 enum target_xfer_status status
;
3532 ULONGEST howmuch
= std::min
<ULONGEST
> (sizeof (buf
), size
- total_xfered
);
3534 status
= target_xfer_partial (ops
, TARGET_OBJECT_MEMORY
, NULL
,
3535 buf
, NULL
, lma
+ total_xfered
, howmuch
,
3537 if (status
== TARGET_XFER_OK
3538 && memcmp (data
+ total_xfered
, buf
, xfered_len
) == 0)
3540 total_xfered
+= xfered_len
;
3549 /* Default implementation of memory verification. */
3552 default_verify_memory (struct target_ops
*self
,
3553 const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3555 /* Start over from the top of the target stack. */
3556 return simple_verify_memory (current_top_target (),
3557 data
, memaddr
, size
);
3561 target_verify_memory (const gdb_byte
*data
, CORE_ADDR memaddr
, ULONGEST size
)
3563 return current_top_target ()->verify_memory (data
, memaddr
, size
);
3566 /* The documentation for this function is in its prototype declaration in
3570 target_insert_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3571 enum target_hw_bp_type rw
)
3573 return current_top_target ()->insert_mask_watchpoint (addr
, mask
, rw
);
3576 /* The documentation for this function is in its prototype declaration in
3580 target_remove_mask_watchpoint (CORE_ADDR addr
, CORE_ADDR mask
,
3581 enum target_hw_bp_type rw
)
3583 return current_top_target ()->remove_mask_watchpoint (addr
, mask
, rw
);
3586 /* The documentation for this function is in its prototype declaration
3590 target_masked_watch_num_registers (CORE_ADDR addr
, CORE_ADDR mask
)
3592 return current_top_target ()->masked_watch_num_registers (addr
, mask
);
3595 /* The documentation for this function is in its prototype declaration
3599 target_ranged_break_num_registers (void)
3601 return current_top_target ()->ranged_break_num_registers ();
3606 struct btrace_target_info
*
3607 target_enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
3609 return current_top_target ()->enable_btrace (ptid
, conf
);
3615 target_disable_btrace (struct btrace_target_info
*btinfo
)
3617 current_top_target ()->disable_btrace (btinfo
);
3623 target_teardown_btrace (struct btrace_target_info
*btinfo
)
3625 current_top_target ()->teardown_btrace (btinfo
);
3631 target_read_btrace (struct btrace_data
*btrace
,
3632 struct btrace_target_info
*btinfo
,
3633 enum btrace_read_type type
)
3635 return current_top_target ()->read_btrace (btrace
, btinfo
, type
);
3640 const struct btrace_config
*
3641 target_btrace_conf (const struct btrace_target_info
*btinfo
)
3643 return current_top_target ()->btrace_conf (btinfo
);
3649 target_stop_recording (void)
3651 current_top_target ()->stop_recording ();
3657 target_save_record (const char *filename
)
3659 current_top_target ()->save_record (filename
);
3665 target_supports_delete_record ()
3667 return current_top_target ()->supports_delete_record ();
3673 target_delete_record (void)
3675 current_top_target ()->delete_record ();
3681 target_record_method (ptid_t ptid
)
3683 return current_top_target ()->record_method (ptid
);
3689 target_record_is_replaying (ptid_t ptid
)
3691 return current_top_target ()->record_is_replaying (ptid
);
3697 target_record_will_replay (ptid_t ptid
, int dir
)
3699 return current_top_target ()->record_will_replay (ptid
, dir
);
3705 target_record_stop_replaying (void)
3707 current_top_target ()->record_stop_replaying ();
3713 target_goto_record_begin (void)
3715 current_top_target ()->goto_record_begin ();
3721 target_goto_record_end (void)
3723 current_top_target ()->goto_record_end ();
3729 target_goto_record (ULONGEST insn
)
3731 current_top_target ()->goto_record (insn
);
3737 target_insn_history (int size
, gdb_disassembly_flags flags
)
3739 current_top_target ()->insn_history (size
, flags
);
3745 target_insn_history_from (ULONGEST from
, int size
,
3746 gdb_disassembly_flags flags
)
3748 current_top_target ()->insn_history_from (from
, size
, flags
);
3754 target_insn_history_range (ULONGEST begin
, ULONGEST end
,
3755 gdb_disassembly_flags flags
)
3757 current_top_target ()->insn_history_range (begin
, end
, flags
);
3763 target_call_history (int size
, record_print_flags flags
)
3765 current_top_target ()->call_history (size
, flags
);
3771 target_call_history_from (ULONGEST begin
, int size
, record_print_flags flags
)
3773 current_top_target ()->call_history_from (begin
, size
, flags
);
3779 target_call_history_range (ULONGEST begin
, ULONGEST end
, record_print_flags flags
)
3781 current_top_target ()->call_history_range (begin
, end
, flags
);
3786 const struct frame_unwind
*
3787 target_get_unwinder (void)
3789 return current_top_target ()->get_unwinder ();
3794 const struct frame_unwind
*
3795 target_get_tailcall_unwinder (void)
3797 return current_top_target ()->get_tailcall_unwinder ();
3803 target_prepare_to_generate_core (void)
3805 current_top_target ()->prepare_to_generate_core ();
3811 target_done_generating_core (void)
3813 current_top_target ()->done_generating_core ();
3818 static char targ_desc
[] =
3819 "Names of targets and files being debugged.\nShows the entire \
3820 stack of targets currently in use (including the exec-file,\n\
3821 core-file, and process, if any), as well as the symbol file name.";
3824 default_rcmd (struct target_ops
*self
, const char *command
,
3825 struct ui_file
*output
)
3827 error (_("\"monitor\" command not supported by this target."));
3831 do_monitor_command (const char *cmd
, int from_tty
)
3833 target_rcmd (cmd
, gdb_stdtarg
);
3836 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3840 flash_erase_command (const char *cmd
, int from_tty
)
3842 /* Used to communicate termination of flash operations to the target. */
3843 bool found_flash_region
= false;
3844 struct gdbarch
*gdbarch
= target_gdbarch ();
3846 std::vector
<mem_region
> mem_regions
= target_memory_map ();
3848 /* Iterate over all memory regions. */
3849 for (const mem_region
&m
: mem_regions
)
3851 /* Is this a flash memory region? */
3852 if (m
.attrib
.mode
== MEM_FLASH
)
3854 found_flash_region
= true;
3855 target_flash_erase (m
.lo
, m
.hi
- m
.lo
);
3857 ui_out_emit_tuple
tuple_emitter (current_uiout
, "erased-regions");
3859 current_uiout
->message (_("Erasing flash memory region at address "));
3860 current_uiout
->field_fmt ("address", "%s", paddress (gdbarch
, m
.lo
));
3861 current_uiout
->message (", size = ");
3862 current_uiout
->field_fmt ("size", "%s", hex_string (m
.hi
- m
.lo
));
3863 current_uiout
->message ("\n");
3867 /* Did we do any flash operations? If so, we need to finalize them. */
3868 if (found_flash_region
)
3869 target_flash_done ();
3871 current_uiout
->message (_("No flash memory regions found.\n"));
3874 /* Print the name of each layers of our target stack. */
3877 maintenance_print_target_stack (const char *cmd
, int from_tty
)
3879 printf_filtered (_("The current target stack is:\n"));
3881 for (target_ops
*t
= current_top_target (); t
!= NULL
; t
= t
->beneath ())
3883 if (t
->to_stratum
== debug_stratum
)
3885 printf_filtered (" - %s (%s)\n", t
->shortname (), t
->longname ());
3892 target_async (int enable
)
3894 infrun_async (enable
);
3895 current_top_target ()->async (enable
);
3901 target_thread_events (int enable
)
3903 current_top_target ()->thread_events (enable
);
3906 /* Controls if targets can report that they can/are async. This is
3907 just for maintainers to use when debugging gdb. */
3908 int target_async_permitted
= 1;
3910 /* The set command writes to this variable. If the inferior is
3911 executing, target_async_permitted is *not* updated. */
3912 static int target_async_permitted_1
= 1;
3915 maint_set_target_async_command (const char *args
, int from_tty
,
3916 struct cmd_list_element
*c
)
3918 if (have_live_inferiors ())
3920 target_async_permitted_1
= target_async_permitted
;
3921 error (_("Cannot change this setting while the inferior is running."));
3924 target_async_permitted
= target_async_permitted_1
;
3928 maint_show_target_async_command (struct ui_file
*file
, int from_tty
,
3929 struct cmd_list_element
*c
,
3932 fprintf_filtered (file
,
3933 _("Controlling the inferior in "
3934 "asynchronous mode is %s.\n"), value
);
3937 /* Return true if the target operates in non-stop mode even with "set
3941 target_always_non_stop_p (void)
3943 return current_top_target ()->always_non_stop_p ();
3949 target_is_non_stop_p (void)
3952 || target_non_stop_enabled
== AUTO_BOOLEAN_TRUE
3953 || (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
3954 && target_always_non_stop_p ()));
3957 /* Controls if targets can report that they always run in non-stop
3958 mode. This is just for maintainers to use when debugging gdb. */
3959 enum auto_boolean target_non_stop_enabled
= AUTO_BOOLEAN_AUTO
;
3961 /* The set command writes to this variable. If the inferior is
3962 executing, target_non_stop_enabled is *not* updated. */
3963 static enum auto_boolean target_non_stop_enabled_1
= AUTO_BOOLEAN_AUTO
;
3965 /* Implementation of "maint set target-non-stop". */
3968 maint_set_target_non_stop_command (const char *args
, int from_tty
,
3969 struct cmd_list_element
*c
)
3971 if (have_live_inferiors ())
3973 target_non_stop_enabled_1
= target_non_stop_enabled
;
3974 error (_("Cannot change this setting while the inferior is running."));
3977 target_non_stop_enabled
= target_non_stop_enabled_1
;
3980 /* Implementation of "maint show target-non-stop". */
3983 maint_show_target_non_stop_command (struct ui_file
*file
, int from_tty
,
3984 struct cmd_list_element
*c
,
3987 if (target_non_stop_enabled
== AUTO_BOOLEAN_AUTO
)
3988 fprintf_filtered (file
,
3989 _("Whether the target is always in non-stop mode "
3990 "is %s (currently %s).\n"), value
,
3991 target_always_non_stop_p () ? "on" : "off");
3993 fprintf_filtered (file
,
3994 _("Whether the target is always in non-stop mode "
3995 "is %s.\n"), value
);
3998 /* Temporary copies of permission settings. */
4000 static int may_write_registers_1
= 1;
4001 static int may_write_memory_1
= 1;
4002 static int may_insert_breakpoints_1
= 1;
4003 static int may_insert_tracepoints_1
= 1;
4004 static int may_insert_fast_tracepoints_1
= 1;
4005 static int may_stop_1
= 1;
4007 /* Make the user-set values match the real values again. */
4010 update_target_permissions (void)
4012 may_write_registers_1
= may_write_registers
;
4013 may_write_memory_1
= may_write_memory
;
4014 may_insert_breakpoints_1
= may_insert_breakpoints
;
4015 may_insert_tracepoints_1
= may_insert_tracepoints
;
4016 may_insert_fast_tracepoints_1
= may_insert_fast_tracepoints
;
4017 may_stop_1
= may_stop
;
4020 /* The one function handles (most of) the permission flags in the same
4024 set_target_permissions (const char *args
, int from_tty
,
4025 struct cmd_list_element
*c
)
4027 if (target_has_execution
)
4029 update_target_permissions ();
4030 error (_("Cannot change this setting while the inferior is running."));
4033 /* Make the real values match the user-changed values. */
4034 may_write_registers
= may_write_registers_1
;
4035 may_insert_breakpoints
= may_insert_breakpoints_1
;
4036 may_insert_tracepoints
= may_insert_tracepoints_1
;
4037 may_insert_fast_tracepoints
= may_insert_fast_tracepoints_1
;
4038 may_stop
= may_stop_1
;
4039 update_observer_mode ();
4042 /* Set memory write permission independently of observer mode. */
4045 set_write_memory_permission (const char *args
, int from_tty
,
4046 struct cmd_list_element
*c
)
4048 /* Make the real values match the user-changed values. */
4049 may_write_memory
= may_write_memory_1
;
4050 update_observer_mode ();
4054 initialize_targets (void)
4056 the_dummy_target
= new dummy_target ();
4057 push_target (the_dummy_target
);
4059 the_debug_target
= new debug_target ();
4061 add_info ("target", info_target_command
, targ_desc
);
4062 add_info ("files", info_target_command
, targ_desc
);
4064 add_setshow_zuinteger_cmd ("target", class_maintenance
, &targetdebug
, _("\
4065 Set target debugging."), _("\
4066 Show target debugging."), _("\
4067 When non-zero, target debugging is enabled. Higher numbers are more\n\
4071 &setdebuglist
, &showdebuglist
);
4073 add_setshow_boolean_cmd ("trust-readonly-sections", class_support
,
4074 &trust_readonly
, _("\
4075 Set mode for reading from readonly sections."), _("\
4076 Show mode for reading from readonly sections."), _("\
4077 When this mode is on, memory reads from readonly sections (such as .text)\n\
4078 will be read from the object file instead of from the target. This will\n\
4079 result in significant performance improvement for remote targets."),
4081 show_trust_readonly
,
4082 &setlist
, &showlist
);
4084 add_com ("monitor", class_obscure
, do_monitor_command
,
4085 _("Send a command to the remote monitor (remote targets only)."));
4087 add_cmd ("target-stack", class_maintenance
, maintenance_print_target_stack
,
4088 _("Print the name of each layer of the internal target stack."),
4089 &maintenanceprintlist
);
4091 add_setshow_boolean_cmd ("target-async", no_class
,
4092 &target_async_permitted_1
, _("\
4093 Set whether gdb controls the inferior in asynchronous mode."), _("\
4094 Show whether gdb controls the inferior in asynchronous mode."), _("\
4095 Tells gdb whether to control the inferior in asynchronous mode."),
4096 maint_set_target_async_command
,
4097 maint_show_target_async_command
,
4098 &maintenance_set_cmdlist
,
4099 &maintenance_show_cmdlist
);
4101 add_setshow_auto_boolean_cmd ("target-non-stop", no_class
,
4102 &target_non_stop_enabled_1
, _("\
4103 Set whether gdb always controls the inferior in non-stop mode."), _("\
4104 Show whether gdb always controls the inferior in non-stop mode."), _("\
4105 Tells gdb whether to control the inferior in non-stop mode."),
4106 maint_set_target_non_stop_command
,
4107 maint_show_target_non_stop_command
,
4108 &maintenance_set_cmdlist
,
4109 &maintenance_show_cmdlist
);
4111 add_setshow_boolean_cmd ("may-write-registers", class_support
,
4112 &may_write_registers_1
, _("\
4113 Set permission to write into registers."), _("\
4114 Show permission to write into registers."), _("\
4115 When this permission is on, GDB may write into the target's registers.\n\
4116 Otherwise, any sort of write attempt will result in an error."),
4117 set_target_permissions
, NULL
,
4118 &setlist
, &showlist
);
4120 add_setshow_boolean_cmd ("may-write-memory", class_support
,
4121 &may_write_memory_1
, _("\
4122 Set permission to write into target memory."), _("\
4123 Show permission to write into target memory."), _("\
4124 When this permission is on, GDB may write into the target's memory.\n\
4125 Otherwise, any sort of write attempt will result in an error."),
4126 set_write_memory_permission
, NULL
,
4127 &setlist
, &showlist
);
4129 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support
,
4130 &may_insert_breakpoints_1
, _("\
4131 Set permission to insert breakpoints in the target."), _("\
4132 Show permission to insert breakpoints in the target."), _("\
4133 When this permission is on, GDB may insert breakpoints in the program.\n\
4134 Otherwise, any sort of insertion attempt will result in an error."),
4135 set_target_permissions
, NULL
,
4136 &setlist
, &showlist
);
4138 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support
,
4139 &may_insert_tracepoints_1
, _("\
4140 Set permission to insert tracepoints in the target."), _("\
4141 Show permission to insert tracepoints in the target."), _("\
4142 When this permission is on, GDB may insert tracepoints in the program.\n\
4143 Otherwise, any sort of insertion attempt will result in an error."),
4144 set_target_permissions
, NULL
,
4145 &setlist
, &showlist
);
4147 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support
,
4148 &may_insert_fast_tracepoints_1
, _("\
4149 Set permission to insert fast tracepoints in the target."), _("\
4150 Show permission to insert fast tracepoints in the target."), _("\
4151 When this permission is on, GDB may insert fast tracepoints.\n\
4152 Otherwise, any sort of insertion attempt will result in an error."),
4153 set_target_permissions
, NULL
,
4154 &setlist
, &showlist
);
4156 add_setshow_boolean_cmd ("may-interrupt", class_support
,
4158 Set permission to interrupt or signal the target."), _("\
4159 Show permission to interrupt or signal the target."), _("\
4160 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4161 Otherwise, any attempt to interrupt or stop will be ignored."),
4162 set_target_permissions
, NULL
,
4163 &setlist
, &showlist
);
4165 add_com ("flash-erase", no_class
, flash_erase_command
,
4166 _("Erase all flash memory regions."));
4168 add_setshow_boolean_cmd ("auto-connect-native-target", class_support
,
4169 &auto_connect_native_target
, _("\
4170 Set whether GDB may automatically connect to the native target."), _("\
4171 Show whether GDB may automatically connect to the native target."), _("\
4172 When on, and GDB is not connected to a target yet, GDB\n\
4173 attempts \"run\" and other commands with the native target."),
4174 NULL
, show_auto_connect_native_target
,
4175 &setlist
, &showlist
);