1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2017 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"
51 static void generic_tls_error (void) ATTRIBUTE_NORETURN;
53 static void default_terminal_info (struct target_ops *, const char *, int);
55 static int default_watchpoint_addr_within_range (struct target_ops *,
56 CORE_ADDR, CORE_ADDR, int);
58 static int default_region_ok_for_hw_watchpoint (struct target_ops *,
61 static void default_rcmd (struct target_ops *, const char *, struct ui_file *);
63 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
66 static int default_follow_fork (struct target_ops *self, int follow_child,
69 static void default_mourn_inferior (struct target_ops *self);
71 static int default_search_memory (struct target_ops *ops,
73 ULONGEST search_space_len,
74 const gdb_byte *pattern,
76 CORE_ADDR *found_addrp);
78 static int default_verify_memory (struct target_ops *self,
80 CORE_ADDR memaddr, ULONGEST size);
82 static struct address_space *default_thread_address_space
83 (struct target_ops *self, ptid_t ptid);
85 static void tcomplain (void) ATTRIBUTE_NORETURN;
87 static int return_zero (struct target_ops *);
89 static int return_zero_has_execution (struct target_ops *, ptid_t);
91 static struct target_ops *find_default_run_target (const char *);
93 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
96 static int dummy_find_memory_regions (struct target_ops *self,
97 find_memory_region_ftype ignore1,
100 static char *dummy_make_corefile_notes (struct target_ops *self,
101 bfd *ignore1, int *ignore2);
103 static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid);
105 static enum exec_direction_kind default_execution_direction
106 (struct target_ops *self);
108 static struct target_ops debug_target;
110 #include "target-delegates.c"
112 static void init_dummy_target (void);
114 static void update_current_target (void);
116 /* Vector of existing target structures. */
117 typedef struct target_ops *target_ops_p;
118 DEF_VEC_P (target_ops_p);
119 static VEC (target_ops_p) *target_structs;
121 /* The initial current target, so that there is always a semi-valid
124 static struct target_ops dummy_target;
126 /* Top of target stack. */
128 static struct target_ops *target_stack;
130 /* The target structure we are currently using to talk to a process
131 or file or whatever "inferior" we have. */
133 struct target_ops current_target;
135 /* Command list for target. */
137 static struct cmd_list_element *targetlist = NULL;
139 /* Nonzero if we should trust readonly sections from the
140 executable when reading memory. */
142 static int trust_readonly = 0;
144 /* Nonzero if we should show true memory content including
145 memory breakpoint inserted by gdb. */
147 static int show_memory_breakpoints = 0;
149 /* These globals control whether GDB attempts to perform these
150 operations; they are useful for targets that need to prevent
151 inadvertant disruption, such as in non-stop mode. */
153 int may_write_registers = 1;
155 int may_write_memory = 1;
157 int may_insert_breakpoints = 1;
159 int may_insert_tracepoints = 1;
161 int may_insert_fast_tracepoints = 1;
165 /* Non-zero if we want to see trace of target level stuff. */
167 static unsigned int targetdebug = 0;
170 set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c)
172 update_current_target ();
176 show_targetdebug (struct ui_file *file, int from_tty,
177 struct cmd_list_element *c, const char *value)
179 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
182 static void setup_target_debug (void);
184 /* The user just typed 'target' without the name of a target. */
187 target_command (const char *arg, int from_tty)
189 fputs_filtered ("Argument required (target name). Try `help target'\n",
193 /* Default target_has_* methods for process_stratum targets. */
196 default_child_has_all_memory (struct target_ops *ops)
198 /* If no inferior selected, then we can't read memory here. */
199 if (ptid_equal (inferior_ptid, null_ptid))
206 default_child_has_memory (struct target_ops *ops)
208 /* If no inferior selected, then we can't read memory here. */
209 if (ptid_equal (inferior_ptid, null_ptid))
216 default_child_has_stack (struct target_ops *ops)
218 /* If no inferior selected, there's no stack. */
219 if (ptid_equal (inferior_ptid, null_ptid))
226 default_child_has_registers (struct target_ops *ops)
228 /* Can't read registers from no inferior. */
229 if (ptid_equal (inferior_ptid, null_ptid))
236 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
238 /* If there's no thread selected, then we can't make it run through
240 if (ptid_equal (the_ptid, null_ptid))
248 target_has_all_memory_1 (void)
250 struct target_ops *t;
252 for (t = current_target.beneath; t != NULL; t = t->beneath)
253 if (t->to_has_all_memory (t))
260 target_has_memory_1 (void)
262 struct target_ops *t;
264 for (t = current_target.beneath; t != NULL; t = t->beneath)
265 if (t->to_has_memory (t))
272 target_has_stack_1 (void)
274 struct target_ops *t;
276 for (t = current_target.beneath; t != NULL; t = t->beneath)
277 if (t->to_has_stack (t))
284 target_has_registers_1 (void)
286 struct target_ops *t;
288 for (t = current_target.beneath; t != NULL; t = t->beneath)
289 if (t->to_has_registers (t))
296 target_has_execution_1 (ptid_t the_ptid)
298 struct target_ops *t;
300 for (t = current_target.beneath; t != NULL; t = t->beneath)
301 if (t->to_has_execution (t, the_ptid))
308 target_has_execution_current (void)
310 return target_has_execution_1 (inferior_ptid);
313 /* Complete initialization of T. This ensures that various fields in
314 T are set, if needed by the target implementation. */
317 complete_target_initialization (struct target_ops *t)
319 /* Provide default values for all "must have" methods. */
321 if (t->to_has_all_memory == NULL)
322 t->to_has_all_memory = return_zero;
324 if (t->to_has_memory == NULL)
325 t->to_has_memory = return_zero;
327 if (t->to_has_stack == NULL)
328 t->to_has_stack = return_zero;
330 if (t->to_has_registers == NULL)
331 t->to_has_registers = return_zero;
333 if (t->to_has_execution == NULL)
334 t->to_has_execution = return_zero_has_execution;
336 /* These methods can be called on an unpushed target and so require
337 a default implementation if the target might plausibly be the
338 default run target. */
339 gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL
340 && t->to_supports_non_stop != NULL));
342 install_delegators (t);
345 /* This is used to implement the various target commands. */
348 open_target (const char *args, int from_tty, struct cmd_list_element *command)
350 struct target_ops *ops = (struct target_ops *) get_cmd_context (command);
353 fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n",
356 ops->to_open (args, from_tty);
359 fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n",
360 ops->to_shortname, args, from_tty);
363 /* Add possible target architecture T to the list and add a new
364 command 'target T->to_shortname'. Set COMPLETER as the command's
365 completer if not NULL. */
368 add_target_with_completer (struct target_ops *t,
369 completer_ftype *completer)
371 struct cmd_list_element *c;
373 complete_target_initialization (t);
375 VEC_safe_push (target_ops_p, target_structs, t);
377 if (targetlist == NULL)
378 add_prefix_cmd ("target", class_run, target_command, _("\
379 Connect to a target machine or process.\n\
380 The first argument is the type or protocol of the target machine.\n\
381 Remaining arguments are interpreted by the target protocol. For more\n\
382 information on the arguments for a particular protocol, type\n\
383 `help target ' followed by the protocol name."),
384 &targetlist, "target ", 0, &cmdlist);
385 c = add_cmd (t->to_shortname, no_class, t->to_doc, &targetlist);
386 set_cmd_sfunc (c, open_target);
387 set_cmd_context (c, t);
388 if (completer != NULL)
389 set_cmd_completer (c, completer);
392 /* Add a possible target architecture to the list. */
395 add_target (struct target_ops *t)
397 add_target_with_completer (t, NULL);
403 add_deprecated_target_alias (struct target_ops *t, const char *alias)
405 struct cmd_list_element *c;
408 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
410 c = add_cmd (alias, no_class, t->to_doc, &targetlist);
411 set_cmd_sfunc (c, open_target);
412 set_cmd_context (c, t);
413 alt = xstrprintf ("target %s", t->to_shortname);
414 deprecate_cmd (c, alt);
422 current_target.to_kill (¤t_target);
426 target_load (const char *arg, int from_tty)
428 target_dcache_invalidate ();
429 (*current_target.to_load) (¤t_target, arg, from_tty);
434 enum target_terminal::terminal_state target_terminal::terminal_state
435 = target_terminal::terminal_is_ours;
437 /* See target/target.h. */
440 target_terminal::init (void)
442 (*current_target.to_terminal_init) (¤t_target);
444 terminal_state = terminal_is_ours;
447 /* See target/target.h. */
450 target_terminal::inferior (void)
452 struct ui *ui = current_ui;
454 /* A background resume (``run&'') should leave GDB in control of the
456 if (ui->prompt_state != PROMPT_BLOCKED)
459 /* Since we always run the inferior in the main console (unless "set
460 inferior-tty" is in effect), when some UI other than the main one
461 calls target_terminal::inferior, then we leave the main UI's
462 terminal settings as is. */
466 if (terminal_state == terminal_is_inferior)
469 /* If GDB is resuming the inferior in the foreground, install
470 inferior's terminal modes. */
471 (*current_target.to_terminal_inferior) (¤t_target);
472 terminal_state = terminal_is_inferior;
474 /* If the user hit C-c before, pretend that it was hit right
476 if (check_quit_flag ())
477 target_pass_ctrlc ();
480 /* See target/target.h. */
483 target_terminal::ours ()
485 struct ui *ui = current_ui;
487 /* See target_terminal::inferior. */
491 if (terminal_state == terminal_is_ours)
494 (*current_target.to_terminal_ours) (¤t_target);
495 terminal_state = terminal_is_ours;
498 /* See target/target.h. */
501 target_terminal::ours_for_output ()
503 struct ui *ui = current_ui;
505 /* See target_terminal::inferior. */
509 if (terminal_state != terminal_is_inferior)
511 (*current_target.to_terminal_ours_for_output) (¤t_target);
512 terminal_state = terminal_is_ours_for_output;
515 /* See target/target.h. */
518 target_terminal::info (const char *arg, int from_tty)
520 (*current_target.to_terminal_info) (¤t_target, arg, from_tty);
526 target_supports_terminal_ours (void)
528 struct target_ops *t;
530 for (t = current_target.beneath; t != NULL; t = t->beneath)
532 if (t->to_terminal_ours != delegate_terminal_ours
533 && t->to_terminal_ours != tdefault_terminal_ours)
543 error (_("You can't do that when your target is `%s'"),
544 current_target.to_shortname);
550 error (_("You can't do that without a process to debug."));
554 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
556 printf_unfiltered (_("No saved terminal information.\n"));
559 /* A default implementation for the to_get_ada_task_ptid target method.
561 This function builds the PTID by using both LWP and TID as part of
562 the PTID lwp and tid elements. The pid used is the pid of the
566 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
568 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
571 static enum exec_direction_kind
572 default_execution_direction (struct target_ops *self)
574 if (!target_can_execute_reverse)
576 else if (!target_can_async_p ())
579 gdb_assert_not_reached ("\
580 to_execution_direction must be implemented for reverse async");
583 /* Go through the target stack from top to bottom, copying over zero
584 entries in current_target, then filling in still empty entries. In
585 effect, we are doing class inheritance through the pushed target
588 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
589 is currently implemented, is that it discards any knowledge of
590 which target an inherited method originally belonged to.
591 Consequently, new new target methods should instead explicitly and
592 locally search the target stack for the target that can handle the
596 update_current_target (void)
598 struct target_ops *t;
600 /* First, reset current's contents. */
601 memset (¤t_target, 0, sizeof (current_target));
603 /* Install the delegators. */
604 install_delegators (¤t_target);
606 current_target.to_stratum = target_stack->to_stratum;
608 #define INHERIT(FIELD, TARGET) \
609 if (!current_target.FIELD) \
610 current_target.FIELD = (TARGET)->FIELD
612 /* Do not add any new INHERITs here. Instead, use the delegation
613 mechanism provided by make-target-delegates. */
614 for (t = target_stack; t; t = t->beneath)
616 INHERIT (to_shortname, t);
617 INHERIT (to_longname, t);
618 INHERIT (to_attach_no_wait, t);
619 INHERIT (to_have_steppable_watchpoint, t);
620 INHERIT (to_have_continuable_watchpoint, t);
621 INHERIT (to_has_thread_control, t);
625 /* Finally, position the target-stack beneath the squashed
626 "current_target". That way code looking for a non-inherited
627 target method can quickly and simply find it. */
628 current_target.beneath = target_stack;
631 setup_target_debug ();
634 /* Push a new target type into the stack of the existing target accessors,
635 possibly superseding some of the existing accessors.
637 Rather than allow an empty stack, we always have the dummy target at
638 the bottom stratum, so we can call the function vectors without
642 push_target (struct target_ops *t)
644 struct target_ops **cur;
646 /* Check magic number. If wrong, it probably means someone changed
647 the struct definition, but not all the places that initialize one. */
648 if (t->to_magic != OPS_MAGIC)
650 fprintf_unfiltered (gdb_stderr,
651 "Magic number of %s target struct wrong\n",
653 internal_error (__FILE__, __LINE__,
654 _("failed internal consistency check"));
657 /* Find the proper stratum to install this target in. */
658 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
660 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
664 /* If there's already targets at this stratum, remove them. */
665 /* FIXME: cagney/2003-10-15: I think this should be popping all
666 targets to CUR, and not just those at this stratum level. */
667 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
669 /* There's already something at this stratum level. Close it,
670 and un-hook it from the stack. */
671 struct target_ops *tmp = (*cur);
673 (*cur) = (*cur)->beneath;
678 /* We have removed all targets in our stratum, now add the new one. */
682 update_current_target ();
685 /* Remove a target_ops vector from the stack, wherever it may be.
686 Return how many times it was removed (0 or 1). */
689 unpush_target (struct target_ops *t)
691 struct target_ops **cur;
692 struct target_ops *tmp;
694 if (t->to_stratum == dummy_stratum)
695 internal_error (__FILE__, __LINE__,
696 _("Attempt to unpush the dummy target"));
698 /* Look for the specified target. Note that we assume that a target
699 can only occur once in the target stack. */
701 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
707 /* If we don't find target_ops, quit. Only open targets should be
712 /* Unchain the target. */
714 (*cur) = (*cur)->beneath;
717 update_current_target ();
719 /* Finally close the target. Note we do this after unchaining, so
720 any target method calls from within the target_close
721 implementation don't end up in T anymore. */
727 /* Unpush TARGET and assert that it worked. */
730 unpush_target_and_assert (struct target_ops *target)
732 if (!unpush_target (target))
734 fprintf_unfiltered (gdb_stderr,
735 "pop_all_targets couldn't find target %s\n",
736 target->to_shortname);
737 internal_error (__FILE__, __LINE__,
738 _("failed internal consistency check"));
743 pop_all_targets_above (enum strata above_stratum)
745 while ((int) (current_target.to_stratum) > (int) above_stratum)
746 unpush_target_and_assert (target_stack);
752 pop_all_targets_at_and_above (enum strata stratum)
754 while ((int) (current_target.to_stratum) >= (int) stratum)
755 unpush_target_and_assert (target_stack);
759 pop_all_targets (void)
761 pop_all_targets_above (dummy_stratum);
764 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
767 target_is_pushed (struct target_ops *t)
769 struct target_ops *cur;
771 /* Check magic number. If wrong, it probably means someone changed
772 the struct definition, but not all the places that initialize one. */
773 if (t->to_magic != OPS_MAGIC)
775 fprintf_unfiltered (gdb_stderr,
776 "Magic number of %s target struct wrong\n",
778 internal_error (__FILE__, __LINE__,
779 _("failed internal consistency check"));
782 for (cur = target_stack; cur != NULL; cur = cur->beneath)
789 /* Default implementation of to_get_thread_local_address. */
792 generic_tls_error (void)
794 throw_error (TLS_GENERIC_ERROR,
795 _("Cannot find thread-local variables on this target"));
798 /* Using the objfile specified in OBJFILE, find the address for the
799 current thread's thread-local storage with offset OFFSET. */
801 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
803 volatile CORE_ADDR addr = 0;
804 struct target_ops *target = ¤t_target;
806 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
808 ptid_t ptid = inferior_ptid;
814 /* Fetch the load module address for this objfile. */
815 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
818 addr = target->to_get_thread_local_address (target, ptid,
821 /* If an error occurred, print TLS related messages here. Otherwise,
822 throw the error to some higher catcher. */
823 CATCH (ex, RETURN_MASK_ALL)
825 int objfile_is_library = (objfile->flags & OBJF_SHARED);
829 case TLS_NO_LIBRARY_SUPPORT_ERROR:
830 error (_("Cannot find thread-local variables "
831 "in this thread library."));
833 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
834 if (objfile_is_library)
835 error (_("Cannot find shared library `%s' in dynamic"
836 " linker's load module list"), objfile_name (objfile));
838 error (_("Cannot find executable file `%s' in dynamic"
839 " linker's load module list"), objfile_name (objfile));
841 case TLS_NOT_ALLOCATED_YET_ERROR:
842 if (objfile_is_library)
843 error (_("The inferior has not yet allocated storage for"
844 " thread-local variables in\n"
845 "the shared library `%s'\n"
847 objfile_name (objfile), target_pid_to_str (ptid));
849 error (_("The inferior has not yet allocated storage for"
850 " thread-local variables in\n"
851 "the executable `%s'\n"
853 objfile_name (objfile), target_pid_to_str (ptid));
855 case TLS_GENERIC_ERROR:
856 if (objfile_is_library)
857 error (_("Cannot find thread-local storage for %s, "
858 "shared library %s:\n%s"),
859 target_pid_to_str (ptid),
860 objfile_name (objfile), ex.message);
862 error (_("Cannot find thread-local storage for %s, "
863 "executable file %s:\n%s"),
864 target_pid_to_str (ptid),
865 objfile_name (objfile), ex.message);
868 throw_exception (ex);
874 /* It wouldn't be wrong here to try a gdbarch method, too; finding
875 TLS is an ABI-specific thing. But we don't do that yet. */
877 error (_("Cannot find thread-local variables on this target"));
883 target_xfer_status_to_string (enum target_xfer_status status)
885 #define CASE(X) case X: return #X
888 CASE(TARGET_XFER_E_IO);
889 CASE(TARGET_XFER_UNAVAILABLE);
898 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
900 /* target_read_string -- read a null terminated string, up to LEN bytes,
901 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
902 Set *STRING to a pointer to malloc'd memory containing the data; the caller
903 is responsible for freeing it. Return the number of bytes successfully
907 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
913 int buffer_allocated;
915 unsigned int nbytes_read = 0;
919 /* Small for testing. */
920 buffer_allocated = 4;
921 buffer = (char *) xmalloc (buffer_allocated);
926 tlen = MIN (len, 4 - (memaddr & 3));
927 offset = memaddr & 3;
929 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
932 /* The transfer request might have crossed the boundary to an
933 unallocated region of memory. Retry the transfer, requesting
937 errcode = target_read_memory (memaddr, buf, 1);
942 if (bufptr - buffer + tlen > buffer_allocated)
946 bytes = bufptr - buffer;
947 buffer_allocated *= 2;
948 buffer = (char *) xrealloc (buffer, buffer_allocated);
949 bufptr = buffer + bytes;
952 for (i = 0; i < tlen; i++)
954 *bufptr++ = buf[i + offset];
955 if (buf[i + offset] == '\000')
957 nbytes_read += i + 1;
973 struct target_section_table *
974 target_get_section_table (struct target_ops *target)
976 return (*target->to_get_section_table) (target);
979 /* Find a section containing ADDR. */
981 struct target_section *
982 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
984 struct target_section_table *table = target_get_section_table (target);
985 struct target_section *secp;
990 for (secp = table->sections; secp < table->sections_end; secp++)
992 if (addr >= secp->addr && addr < secp->endaddr)
999 /* Helper for the memory xfer routines. Checks the attributes of the
1000 memory region of MEMADDR against the read or write being attempted.
1001 If the access is permitted returns true, otherwise returns false.
1002 REGION_P is an optional output parameter. If not-NULL, it is
1003 filled with a pointer to the memory region of MEMADDR. REG_LEN
1004 returns LEN trimmed to the end of the region. This is how much the
1005 caller can continue requesting, if the access is permitted. A
1006 single xfer request must not straddle memory region boundaries. */
1009 memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf,
1010 ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len,
1011 struct mem_region **region_p)
1013 struct mem_region *region;
1015 region = lookup_mem_region (memaddr);
1017 if (region_p != NULL)
1020 switch (region->attrib.mode)
1023 if (writebuf != NULL)
1028 if (readbuf != NULL)
1033 /* We only support writing to flash during "load" for now. */
1034 if (writebuf != NULL)
1035 error (_("Writing to flash memory forbidden in this context"));
1042 /* region->hi == 0 means there's no upper bound. */
1043 if (memaddr + len < region->hi || region->hi == 0)
1046 *reg_len = region->hi - memaddr;
1051 /* Read memory from more than one valid target. A core file, for
1052 instance, could have some of memory but delegate other bits to
1053 the target below it. So, we must manually try all targets. */
1055 enum target_xfer_status
1056 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1057 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1058 ULONGEST *xfered_len)
1060 enum target_xfer_status res;
1064 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1065 readbuf, writebuf, memaddr, len,
1067 if (res == TARGET_XFER_OK)
1070 /* Stop if the target reports that the memory is not available. */
1071 if (res == TARGET_XFER_UNAVAILABLE)
1074 /* We want to continue past core files to executables, but not
1075 past a running target's memory. */
1076 if (ops->to_has_all_memory (ops))
1081 while (ops != NULL);
1083 /* The cache works at the raw memory level. Make sure the cache
1084 gets updated with raw contents no matter what kind of memory
1085 object was originally being written. Note we do write-through
1086 first, so that if it fails, we don't write to the cache contents
1087 that never made it to the target. */
1088 if (writebuf != NULL
1089 && !ptid_equal (inferior_ptid, null_ptid)
1090 && target_dcache_init_p ()
1091 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1093 DCACHE *dcache = target_dcache_get ();
1095 /* Note that writing to an area of memory which wasn't present
1096 in the cache doesn't cause it to be loaded in. */
1097 dcache_update (dcache, res, memaddr, writebuf, *xfered_len);
1103 /* Perform a partial memory transfer.
1104 For docs see target.h, to_xfer_partial. */
1106 static enum target_xfer_status
1107 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1108 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1109 ULONGEST len, ULONGEST *xfered_len)
1111 enum target_xfer_status res;
1113 struct mem_region *region;
1114 struct inferior *inf;
1116 /* For accesses to unmapped overlay sections, read directly from
1117 files. Must do this first, as MEMADDR may need adjustment. */
1118 if (readbuf != NULL && overlay_debugging)
1120 struct obj_section *section = find_pc_overlay (memaddr);
1122 if (pc_in_unmapped_range (memaddr, section))
1124 struct target_section_table *table
1125 = target_get_section_table (ops);
1126 const char *section_name = section->the_bfd_section->name;
1128 memaddr = overlay_mapped_address (memaddr, section);
1129 return section_table_xfer_memory_partial (readbuf, writebuf,
1130 memaddr, len, xfered_len,
1132 table->sections_end,
1137 /* Try the executable files, if "trust-readonly-sections" is set. */
1138 if (readbuf != NULL && trust_readonly)
1140 struct target_section *secp;
1141 struct target_section_table *table;
1143 secp = target_section_by_addr (ops, memaddr);
1145 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1146 secp->the_bfd_section)
1149 table = target_get_section_table (ops);
1150 return section_table_xfer_memory_partial (readbuf, writebuf,
1151 memaddr, len, xfered_len,
1153 table->sections_end,
1158 /* Try GDB's internal data cache. */
1160 if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len,
1162 return TARGET_XFER_E_IO;
1164 if (!ptid_equal (inferior_ptid, null_ptid))
1165 inf = find_inferior_ptid (inferior_ptid);
1171 /* The dcache reads whole cache lines; that doesn't play well
1172 with reading from a trace buffer, because reading outside of
1173 the collected memory range fails. */
1174 && get_traceframe_number () == -1
1175 && (region->attrib.cache
1176 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1177 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1179 DCACHE *dcache = target_dcache_get_or_init ();
1181 return dcache_read_memory_partial (ops, dcache, memaddr, readbuf,
1182 reg_len, xfered_len);
1185 /* If none of those methods found the memory we wanted, fall back
1186 to a target partial transfer. Normally a single call to
1187 to_xfer_partial is enough; if it doesn't recognize an object
1188 it will call the to_xfer_partial of the next target down.
1189 But for memory this won't do. Memory is the only target
1190 object which can be read from more than one valid target.
1191 A core file, for instance, could have some of memory but
1192 delegate other bits to the target below it. So, we must
1193 manually try all targets. */
1195 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1198 /* If we still haven't got anything, return the last error. We
1203 /* Perform a partial memory transfer. For docs see target.h,
1206 static enum target_xfer_status
1207 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1208 gdb_byte *readbuf, const gdb_byte *writebuf,
1209 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1211 enum target_xfer_status res;
1213 /* Zero length requests are ok and require no work. */
1215 return TARGET_XFER_EOF;
1217 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1218 breakpoint insns, thus hiding out from higher layers whether
1219 there are software breakpoints inserted in the code stream. */
1220 if (readbuf != NULL)
1222 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1225 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1226 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len);
1230 /* A large write request is likely to be partially satisfied
1231 by memory_xfer_partial_1. We will continually malloc
1232 and free a copy of the entire write request for breakpoint
1233 shadow handling even though we only end up writing a small
1234 subset of it. Cap writes to a limit specified by the target
1235 to mitigate this. */
1236 len = std::min (ops->to_get_memory_xfer_limit (ops), len);
1238 gdb::byte_vector buf (writebuf, writebuf + len);
1239 breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len);
1240 res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len,
1247 scoped_restore_tmpl<int>
1248 make_scoped_restore_show_memory_breakpoints (int show)
1250 return make_scoped_restore (&show_memory_breakpoints, show);
1253 /* For docs see target.h, to_xfer_partial. */
1255 enum target_xfer_status
1256 target_xfer_partial (struct target_ops *ops,
1257 enum target_object object, const char *annex,
1258 gdb_byte *readbuf, const gdb_byte *writebuf,
1259 ULONGEST offset, ULONGEST len,
1260 ULONGEST *xfered_len)
1262 enum target_xfer_status retval;
1264 gdb_assert (ops->to_xfer_partial != NULL);
1266 /* Transfer is done when LEN is zero. */
1268 return TARGET_XFER_EOF;
1270 if (writebuf && !may_write_memory)
1271 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1272 core_addr_to_string_nz (offset), plongest (len));
1276 /* If this is a memory transfer, let the memory-specific code
1277 have a look at it instead. Memory transfers are more
1279 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1280 || object == TARGET_OBJECT_CODE_MEMORY)
1281 retval = memory_xfer_partial (ops, object, readbuf,
1282 writebuf, offset, len, xfered_len);
1283 else if (object == TARGET_OBJECT_RAW_MEMORY)
1285 /* Skip/avoid accessing the target if the memory region
1286 attributes block the access. Check this here instead of in
1287 raw_memory_xfer_partial as otherwise we'd end up checking
1288 this twice in the case of the memory_xfer_partial path is
1289 taken; once before checking the dcache, and another in the
1290 tail call to raw_memory_xfer_partial. */
1291 if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len,
1293 return TARGET_XFER_E_IO;
1295 /* Request the normal memory object from other layers. */
1296 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1300 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1301 writebuf, offset, len, xfered_len);
1305 const unsigned char *myaddr = NULL;
1307 fprintf_unfiltered (gdb_stdlog,
1308 "%s:target_xfer_partial "
1309 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1312 (annex ? annex : "(null)"),
1313 host_address_to_string (readbuf),
1314 host_address_to_string (writebuf),
1315 core_addr_to_string_nz (offset),
1316 pulongest (len), retval,
1317 pulongest (*xfered_len));
1323 if (retval == TARGET_XFER_OK && myaddr != NULL)
1327 fputs_unfiltered (", bytes =", gdb_stdlog);
1328 for (i = 0; i < *xfered_len; i++)
1330 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1332 if (targetdebug < 2 && i > 0)
1334 fprintf_unfiltered (gdb_stdlog, " ...");
1337 fprintf_unfiltered (gdb_stdlog, "\n");
1340 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1344 fputc_unfiltered ('\n', gdb_stdlog);
1347 /* Check implementations of to_xfer_partial update *XFERED_LEN
1348 properly. Do assertion after printing debug messages, so that we
1349 can find more clues on assertion failure from debugging messages. */
1350 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE)
1351 gdb_assert (*xfered_len > 0);
1356 /* Read LEN bytes of target memory at address MEMADDR, placing the
1357 results in GDB's memory at MYADDR. Returns either 0 for success or
1358 -1 if any error occurs.
1360 If an error occurs, no guarantee is made about the contents of the data at
1361 MYADDR. In particular, the caller should not depend upon partial reads
1362 filling the buffer with good data. There is no way for the caller to know
1363 how much good data might have been transfered anyway. Callers that can
1364 deal with partial reads should call target_read (which will retry until
1365 it makes no progress, and then return how much was transferred). */
1368 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1370 /* Dispatch to the topmost target, not the flattened current_target.
1371 Memory accesses check target->to_has_(all_)memory, and the
1372 flattened target doesn't inherit those. */
1373 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1374 myaddr, memaddr, len) == len)
1380 /* See target/target.h. */
1383 target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
1388 r = target_read_memory (memaddr, buf, sizeof buf);
1391 *result = extract_unsigned_integer (buf, sizeof buf,
1392 gdbarch_byte_order (target_gdbarch ()));
1396 /* Like target_read_memory, but specify explicitly that this is a read
1397 from the target's raw memory. That is, this read bypasses the
1398 dcache, breakpoint shadowing, etc. */
1401 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1403 /* See comment in target_read_memory about why the request starts at
1404 current_target.beneath. */
1405 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1406 myaddr, memaddr, len) == len)
1412 /* Like target_read_memory, but specify explicitly that this is a read from
1413 the target's stack. This may trigger different cache behavior. */
1416 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1418 /* See comment in target_read_memory about why the request starts at
1419 current_target.beneath. */
1420 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1421 myaddr, memaddr, len) == len)
1427 /* Like target_read_memory, but specify explicitly that this is a read from
1428 the target's code. This may trigger different cache behavior. */
1431 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1433 /* See comment in target_read_memory about why the request starts at
1434 current_target.beneath. */
1435 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1436 myaddr, memaddr, len) == len)
1442 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1443 Returns either 0 for success or -1 if any error occurs. If an
1444 error occurs, no guarantee is made about how much data got written.
1445 Callers that can deal with partial writes should call
1449 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1451 /* See comment in target_read_memory about why the request starts at
1452 current_target.beneath. */
1453 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1454 myaddr, memaddr, len) == len)
1460 /* Write LEN bytes from MYADDR to target raw memory at address
1461 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1462 If an error occurs, no guarantee is made about how much data got
1463 written. Callers that can deal with partial writes should call
1467 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1469 /* See comment in target_read_memory about why the request starts at
1470 current_target.beneath. */
1471 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1472 myaddr, memaddr, len) == len)
1478 /* Fetch the target's memory map. */
1480 std::vector<mem_region>
1481 target_memory_map (void)
1483 std::vector<mem_region> result
1484 = current_target.to_memory_map (¤t_target);
1485 if (result.empty ())
1488 std::sort (result.begin (), result.end ());
1490 /* Check that regions do not overlap. Simultaneously assign
1491 a numbering for the "mem" commands to use to refer to
1493 mem_region *last_one = NULL;
1494 for (size_t ix = 0; ix < result.size (); ix++)
1496 mem_region *this_one = &result[ix];
1497 this_one->number = ix;
1499 if (last_one != NULL && last_one->hi > this_one->lo)
1501 warning (_("Overlapping regions in memory map: ignoring"));
1502 return std::vector<mem_region> ();
1505 last_one = this_one;
1512 target_flash_erase (ULONGEST address, LONGEST length)
1514 current_target.to_flash_erase (¤t_target, address, length);
1518 target_flash_done (void)
1520 current_target.to_flash_done (¤t_target);
1524 show_trust_readonly (struct ui_file *file, int from_tty,
1525 struct cmd_list_element *c, const char *value)
1527 fprintf_filtered (file,
1528 _("Mode for reading from readonly sections is %s.\n"),
1532 /* Target vector read/write partial wrapper functions. */
1534 static enum target_xfer_status
1535 target_read_partial (struct target_ops *ops,
1536 enum target_object object,
1537 const char *annex, gdb_byte *buf,
1538 ULONGEST offset, ULONGEST len,
1539 ULONGEST *xfered_len)
1541 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1545 static enum target_xfer_status
1546 target_write_partial (struct target_ops *ops,
1547 enum target_object object,
1548 const char *annex, const gdb_byte *buf,
1549 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1551 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1555 /* Wrappers to perform the full transfer. */
1557 /* For docs on target_read see target.h. */
1560 target_read (struct target_ops *ops,
1561 enum target_object object,
1562 const char *annex, gdb_byte *buf,
1563 ULONGEST offset, LONGEST len)
1565 LONGEST xfered_total = 0;
1568 /* If we are reading from a memory object, find the length of an addressable
1569 unit for that architecture. */
1570 if (object == TARGET_OBJECT_MEMORY
1571 || object == TARGET_OBJECT_STACK_MEMORY
1572 || object == TARGET_OBJECT_CODE_MEMORY
1573 || object == TARGET_OBJECT_RAW_MEMORY)
1574 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1576 while (xfered_total < len)
1578 ULONGEST xfered_partial;
1579 enum target_xfer_status status;
1581 status = target_read_partial (ops, object, annex,
1582 buf + xfered_total * unit_size,
1583 offset + xfered_total, len - xfered_total,
1586 /* Call an observer, notifying them of the xfer progress? */
1587 if (status == TARGET_XFER_EOF)
1588 return xfered_total;
1589 else if (status == TARGET_XFER_OK)
1591 xfered_total += xfered_partial;
1595 return TARGET_XFER_E_IO;
1601 /* Assuming that the entire [begin, end) range of memory cannot be
1602 read, try to read whatever subrange is possible to read.
1604 The function returns, in RESULT, either zero or one memory block.
1605 If there's a readable subrange at the beginning, it is completely
1606 read and returned. Any further readable subrange will not be read.
1607 Otherwise, if there's a readable subrange at the end, it will be
1608 completely read and returned. Any readable subranges before it
1609 (obviously, not starting at the beginning), will be ignored. In
1610 other cases -- either no readable subrange, or readable subrange(s)
1611 that is neither at the beginning, or end, nothing is returned.
1613 The purpose of this function is to handle a read across a boundary
1614 of accessible memory in a case when memory map is not available.
1615 The above restrictions are fine for this case, but will give
1616 incorrect results if the memory is 'patchy'. However, supporting
1617 'patchy' memory would require trying to read every single byte,
1618 and it seems unacceptable solution. Explicit memory map is
1619 recommended for this case -- and target_read_memory_robust will
1620 take care of reading multiple ranges then. */
1623 read_whatever_is_readable (struct target_ops *ops,
1624 const ULONGEST begin, const ULONGEST end,
1626 std::vector<memory_read_result> *result)
1628 ULONGEST current_begin = begin;
1629 ULONGEST current_end = end;
1631 ULONGEST xfered_len;
1633 /* If we previously failed to read 1 byte, nothing can be done here. */
1634 if (end - begin <= 1)
1637 gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin));
1639 /* Check that either first or the last byte is readable, and give up
1640 if not. This heuristic is meant to permit reading accessible memory
1641 at the boundary of accessible region. */
1642 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1643 buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK)
1648 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1649 buf.get () + (end - begin) - 1, end - 1, 1,
1650 &xfered_len) == TARGET_XFER_OK)
1658 /* Loop invariant is that the [current_begin, current_end) was previously
1659 found to be not readable as a whole.
1661 Note loop condition -- if the range has 1 byte, we can't divide the range
1662 so there's no point trying further. */
1663 while (current_end - current_begin > 1)
1665 ULONGEST first_half_begin, first_half_end;
1666 ULONGEST second_half_begin, second_half_end;
1668 ULONGEST middle = current_begin + (current_end - current_begin) / 2;
1672 first_half_begin = current_begin;
1673 first_half_end = middle;
1674 second_half_begin = middle;
1675 second_half_end = current_end;
1679 first_half_begin = middle;
1680 first_half_end = current_end;
1681 second_half_begin = current_begin;
1682 second_half_end = middle;
1685 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1686 buf.get () + (first_half_begin - begin) * unit_size,
1688 first_half_end - first_half_begin);
1690 if (xfer == first_half_end - first_half_begin)
1692 /* This half reads up fine. So, the error must be in the
1694 current_begin = second_half_begin;
1695 current_end = second_half_end;
1699 /* This half is not readable. Because we've tried one byte, we
1700 know some part of this half if actually readable. Go to the next
1701 iteration to divide again and try to read.
1703 We don't handle the other half, because this function only tries
1704 to read a single readable subrange. */
1705 current_begin = first_half_begin;
1706 current_end = first_half_end;
1712 /* The [begin, current_begin) range has been read. */
1713 result->emplace_back (begin, current_end, std::move (buf));
1717 /* The [current_end, end) range has been read. */
1718 LONGEST region_len = end - current_end;
1720 gdb::unique_xmalloc_ptr<gdb_byte> data
1721 ((gdb_byte *) xmalloc (region_len * unit_size));
1722 memcpy (data.get (), buf.get () + (current_end - begin) * unit_size,
1723 region_len * unit_size);
1724 result->emplace_back (current_end, end, std::move (data));
1728 std::vector<memory_read_result>
1729 read_memory_robust (struct target_ops *ops,
1730 const ULONGEST offset, const LONGEST len)
1732 std::vector<memory_read_result> result;
1733 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1735 LONGEST xfered_total = 0;
1736 while (xfered_total < len)
1738 struct mem_region *region = lookup_mem_region (offset + xfered_total);
1741 /* If there is no explicit region, a fake one should be created. */
1742 gdb_assert (region);
1744 if (region->hi == 0)
1745 region_len = len - xfered_total;
1747 region_len = region->hi - offset;
1749 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1751 /* Cannot read this region. Note that we can end up here only
1752 if the region is explicitly marked inaccessible, or
1753 'inaccessible-by-default' is in effect. */
1754 xfered_total += region_len;
1758 LONGEST to_read = std::min (len - xfered_total, region_len);
1759 gdb::unique_xmalloc_ptr<gdb_byte> buffer
1760 ((gdb_byte *) xmalloc (to_read * unit_size));
1762 LONGEST xfered_partial =
1763 target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (),
1764 offset + xfered_total, to_read);
1765 /* Call an observer, notifying them of the xfer progress? */
1766 if (xfered_partial <= 0)
1768 /* Got an error reading full chunk. See if maybe we can read
1770 read_whatever_is_readable (ops, offset + xfered_total,
1771 offset + xfered_total + to_read,
1772 unit_size, &result);
1773 xfered_total += to_read;
1777 result.emplace_back (offset + xfered_total,
1778 offset + xfered_total + xfered_partial,
1779 std::move (buffer));
1780 xfered_total += xfered_partial;
1790 /* An alternative to target_write with progress callbacks. */
1793 target_write_with_progress (struct target_ops *ops,
1794 enum target_object object,
1795 const char *annex, const gdb_byte *buf,
1796 ULONGEST offset, LONGEST len,
1797 void (*progress) (ULONGEST, void *), void *baton)
1799 LONGEST xfered_total = 0;
1802 /* If we are writing to a memory object, find the length of an addressable
1803 unit for that architecture. */
1804 if (object == TARGET_OBJECT_MEMORY
1805 || object == TARGET_OBJECT_STACK_MEMORY
1806 || object == TARGET_OBJECT_CODE_MEMORY
1807 || object == TARGET_OBJECT_RAW_MEMORY)
1808 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1810 /* Give the progress callback a chance to set up. */
1812 (*progress) (0, baton);
1814 while (xfered_total < len)
1816 ULONGEST xfered_partial;
1817 enum target_xfer_status status;
1819 status = target_write_partial (ops, object, annex,
1820 buf + xfered_total * unit_size,
1821 offset + xfered_total, len - xfered_total,
1824 if (status != TARGET_XFER_OK)
1825 return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO;
1828 (*progress) (xfered_partial, baton);
1830 xfered_total += xfered_partial;
1836 /* For docs on target_write see target.h. */
1839 target_write (struct target_ops *ops,
1840 enum target_object object,
1841 const char *annex, const gdb_byte *buf,
1842 ULONGEST offset, LONGEST len)
1844 return target_write_with_progress (ops, object, annex, buf, offset, len,
1848 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1849 the size of the transferred data. PADDING additional bytes are
1850 available in *BUF_P. This is a helper function for
1851 target_read_alloc; see the declaration of that function for more
1855 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1856 const char *annex, gdb_byte **buf_p, int padding)
1858 size_t buf_alloc, buf_pos;
1861 /* This function does not have a length parameter; it reads the
1862 entire OBJECT). Also, it doesn't support objects fetched partly
1863 from one target and partly from another (in a different stratum,
1864 e.g. a core file and an executable). Both reasons make it
1865 unsuitable for reading memory. */
1866 gdb_assert (object != TARGET_OBJECT_MEMORY);
1868 /* Start by reading up to 4K at a time. The target will throttle
1869 this number down if necessary. */
1871 buf = (gdb_byte *) xmalloc (buf_alloc);
1875 ULONGEST xfered_len;
1876 enum target_xfer_status status;
1878 status = target_read_partial (ops, object, annex, &buf[buf_pos],
1879 buf_pos, buf_alloc - buf_pos - padding,
1882 if (status == TARGET_XFER_EOF)
1884 /* Read all there was. */
1891 else if (status != TARGET_XFER_OK)
1893 /* An error occurred. */
1895 return TARGET_XFER_E_IO;
1898 buf_pos += xfered_len;
1900 /* If the buffer is filling up, expand it. */
1901 if (buf_alloc < buf_pos * 2)
1904 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
1911 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1912 the size of the transferred data. See the declaration in "target.h"
1913 function for more information about the return value. */
1916 target_read_alloc (struct target_ops *ops, enum target_object object,
1917 const char *annex, gdb_byte **buf_p)
1919 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
1924 gdb::unique_xmalloc_ptr<char>
1925 target_read_stralloc (struct target_ops *ops, enum target_object object,
1930 LONGEST i, transferred;
1932 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
1933 bufstr = (char *) buffer;
1935 if (transferred < 0)
1938 if (transferred == 0)
1939 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
1941 bufstr[transferred] = 0;
1943 /* Check for embedded NUL bytes; but allow trailing NULs. */
1944 for (i = strlen (bufstr); i < transferred; i++)
1947 warning (_("target object %d, annex %s, "
1948 "contained unexpected null characters"),
1949 (int) object, annex ? annex : "(none)");
1953 return gdb::unique_xmalloc_ptr<char> (bufstr);
1956 /* Memory transfer methods. */
1959 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1962 /* This method is used to read from an alternate, non-current
1963 target. This read must bypass the overlay support (as symbols
1964 don't match this target), and GDB's internal cache (wrong cache
1965 for this target). */
1966 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
1968 memory_error (TARGET_XFER_E_IO, addr);
1972 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
1973 int len, enum bfd_endian byte_order)
1975 gdb_byte buf[sizeof (ULONGEST)];
1977 gdb_assert (len <= sizeof (buf));
1978 get_target_memory (ops, addr, buf, len);
1979 return extract_unsigned_integer (buf, len, byte_order);
1985 target_insert_breakpoint (struct gdbarch *gdbarch,
1986 struct bp_target_info *bp_tgt)
1988 if (!may_insert_breakpoints)
1990 warning (_("May not insert breakpoints"));
1994 return current_target.to_insert_breakpoint (¤t_target,
2001 target_remove_breakpoint (struct gdbarch *gdbarch,
2002 struct bp_target_info *bp_tgt,
2003 enum remove_bp_reason reason)
2005 /* This is kind of a weird case to handle, but the permission might
2006 have been changed after breakpoints were inserted - in which case
2007 we should just take the user literally and assume that any
2008 breakpoints should be left in place. */
2009 if (!may_insert_breakpoints)
2011 warning (_("May not remove breakpoints"));
2015 return current_target.to_remove_breakpoint (¤t_target,
2016 gdbarch, bp_tgt, reason);
2020 info_target_command (const char *args, int from_tty)
2022 struct target_ops *t;
2023 int has_all_mem = 0;
2025 if (symfile_objfile != NULL)
2026 printf_unfiltered (_("Symbols from \"%s\".\n"),
2027 objfile_name (symfile_objfile));
2029 for (t = target_stack; t != NULL; t = t->beneath)
2031 if (!(*t->to_has_memory) (t))
2034 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2037 printf_unfiltered (_("\tWhile running this, "
2038 "GDB does not access memory from...\n"));
2039 printf_unfiltered ("%s:\n", t->to_longname);
2040 (t->to_files_info) (t);
2041 has_all_mem = (*t->to_has_all_memory) (t);
2045 /* This function is called before any new inferior is created, e.g.
2046 by running a program, attaching, or connecting to a target.
2047 It cleans up any state from previous invocations which might
2048 change between runs. This is a subset of what target_preopen
2049 resets (things which might change between targets). */
2052 target_pre_inferior (int from_tty)
2054 /* Clear out solib state. Otherwise the solib state of the previous
2055 inferior might have survived and is entirely wrong for the new
2056 target. This has been observed on GNU/Linux using glibc 2.3. How
2068 Cannot access memory at address 0xdeadbeef
2071 /* In some OSs, the shared library list is the same/global/shared
2072 across inferiors. If code is shared between processes, so are
2073 memory regions and features. */
2074 if (!gdbarch_has_global_solist (target_gdbarch ()))
2076 no_shared_libraries (NULL, from_tty);
2078 invalidate_target_mem_regions ();
2080 target_clear_description ();
2083 /* attach_flag may be set if the previous process associated with
2084 the inferior was attached to. */
2085 current_inferior ()->attach_flag = 0;
2087 current_inferior ()->highest_thread_num = 0;
2089 agent_capability_invalidate ();
2092 /* Callback for iterate_over_inferiors. Gets rid of the given
2096 dispose_inferior (struct inferior *inf, void *args)
2098 struct thread_info *thread;
2100 thread = any_thread_of_process (inf->pid);
2103 switch_to_thread (thread->ptid);
2105 /* Core inferiors actually should be detached, not killed. */
2106 if (target_has_execution)
2109 target_detach (NULL, 0);
2115 /* This is to be called by the open routine before it does
2119 target_preopen (int from_tty)
2123 if (have_inferiors ())
2126 || !have_live_inferiors ()
2127 || query (_("A program is being debugged already. Kill it? ")))
2128 iterate_over_inferiors (dispose_inferior, NULL);
2130 error (_("Program not killed."));
2133 /* Calling target_kill may remove the target from the stack. But if
2134 it doesn't (which seems like a win for UDI), remove it now. */
2135 /* Leave the exec target, though. The user may be switching from a
2136 live process to a core of the same program. */
2137 pop_all_targets_above (file_stratum);
2139 target_pre_inferior (from_tty);
2142 /* Detach a target after doing deferred register stores. */
2145 target_detach (const char *args, int from_tty)
2147 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2148 /* Don't remove global breakpoints here. They're removed on
2149 disconnection from the target. */
2152 /* If we're in breakpoints-always-inserted mode, have to remove
2153 them before detaching. */
2154 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2156 prepare_for_detach ();
2158 current_target.to_detach (¤t_target, args, from_tty);
2162 target_disconnect (const char *args, int from_tty)
2164 /* If we're in breakpoints-always-inserted mode or if breakpoints
2165 are global across processes, we have to remove them before
2167 remove_breakpoints ();
2169 current_target.to_disconnect (¤t_target, args, from_tty);
2172 /* See target/target.h. */
2175 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2177 return (current_target.to_wait) (¤t_target, ptid, status, options);
2183 default_target_wait (struct target_ops *ops,
2184 ptid_t ptid, struct target_waitstatus *status,
2187 status->kind = TARGET_WAITKIND_IGNORE;
2188 return minus_one_ptid;
2192 target_pid_to_str (ptid_t ptid)
2194 return (*current_target.to_pid_to_str) (¤t_target, ptid);
2198 target_thread_name (struct thread_info *info)
2200 return current_target.to_thread_name (¤t_target, info);
2203 struct thread_info *
2204 target_thread_handle_to_thread_info (const gdb_byte *thread_handle,
2206 struct inferior *inf)
2208 return current_target.to_thread_handle_to_thread_info
2209 (¤t_target, thread_handle, handle_len, inf);
2213 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2215 target_dcache_invalidate ();
2217 current_target.to_resume (¤t_target, ptid, step, signal);
2219 registers_changed_ptid (ptid);
2220 /* We only set the internal executing state here. The user/frontend
2221 running state is set at a higher level. */
2222 set_executing (ptid, 1);
2223 clear_inline_frame_state (ptid);
2226 /* If true, target_commit_resume is a nop. */
2227 static int defer_target_commit_resume;
2232 target_commit_resume (void)
2234 struct target_ops *t;
2236 if (defer_target_commit_resume)
2239 current_target.to_commit_resume (¤t_target);
2244 scoped_restore_tmpl<int>
2245 make_scoped_defer_target_commit_resume ()
2247 return make_scoped_restore (&defer_target_commit_resume, 1);
2251 target_pass_signals (int numsigs, unsigned char *pass_signals)
2253 (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals);
2257 target_program_signals (int numsigs, unsigned char *program_signals)
2259 (*current_target.to_program_signals) (¤t_target,
2260 numsigs, program_signals);
2264 default_follow_fork (struct target_ops *self, int follow_child,
2267 /* Some target returned a fork event, but did not know how to follow it. */
2268 internal_error (__FILE__, __LINE__,
2269 _("could not find a target to follow fork"));
2272 /* Look through the list of possible targets for a target that can
2276 target_follow_fork (int follow_child, int detach_fork)
2278 return current_target.to_follow_fork (¤t_target,
2279 follow_child, detach_fork);
2282 /* Target wrapper for follow exec hook. */
2285 target_follow_exec (struct inferior *inf, char *execd_pathname)
2287 current_target.to_follow_exec (¤t_target, inf, execd_pathname);
2291 default_mourn_inferior (struct target_ops *self)
2293 internal_error (__FILE__, __LINE__,
2294 _("could not find a target to follow mourn inferior"));
2298 target_mourn_inferior (ptid_t ptid)
2300 gdb_assert (ptid_equal (ptid, inferior_ptid));
2301 current_target.to_mourn_inferior (¤t_target);
2303 /* We no longer need to keep handles on any of the object files.
2304 Make sure to release them to avoid unnecessarily locking any
2305 of them while we're not actually debugging. */
2306 bfd_cache_close_all ();
2309 /* Look for a target which can describe architectural features, starting
2310 from TARGET. If we find one, return its description. */
2312 const struct target_desc *
2313 target_read_description (struct target_ops *target)
2315 return target->to_read_description (target);
2318 /* This implements a basic search of memory, reading target memory and
2319 performing the search here (as opposed to performing the search in on the
2320 target side with, for example, gdbserver). */
2323 simple_search_memory (struct target_ops *ops,
2324 CORE_ADDR start_addr, ULONGEST search_space_len,
2325 const gdb_byte *pattern, ULONGEST pattern_len,
2326 CORE_ADDR *found_addrp)
2328 /* NOTE: also defined in find.c testcase. */
2329 #define SEARCH_CHUNK_SIZE 16000
2330 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2331 /* Buffer to hold memory contents for searching. */
2332 unsigned search_buf_size;
2334 search_buf_size = chunk_size + pattern_len - 1;
2336 /* No point in trying to allocate a buffer larger than the search space. */
2337 if (search_space_len < search_buf_size)
2338 search_buf_size = search_space_len;
2340 gdb::byte_vector search_buf (search_buf_size);
2342 /* Prime the search buffer. */
2344 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2345 search_buf.data (), start_addr, search_buf_size)
2348 warning (_("Unable to access %s bytes of target "
2349 "memory at %s, halting search."),
2350 pulongest (search_buf_size), hex_string (start_addr));
2354 /* Perform the search.
2356 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2357 When we've scanned N bytes we copy the trailing bytes to the start and
2358 read in another N bytes. */
2360 while (search_space_len >= pattern_len)
2362 gdb_byte *found_ptr;
2363 unsigned nr_search_bytes
2364 = std::min (search_space_len, (ULONGEST) search_buf_size);
2366 found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes,
2367 pattern, pattern_len);
2369 if (found_ptr != NULL)
2371 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ());
2373 *found_addrp = found_addr;
2377 /* Not found in this chunk, skip to next chunk. */
2379 /* Don't let search_space_len wrap here, it's unsigned. */
2380 if (search_space_len >= chunk_size)
2381 search_space_len -= chunk_size;
2383 search_space_len = 0;
2385 if (search_space_len >= pattern_len)
2387 unsigned keep_len = search_buf_size - chunk_size;
2388 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2391 /* Copy the trailing part of the previous iteration to the front
2392 of the buffer for the next iteration. */
2393 gdb_assert (keep_len == pattern_len - 1);
2394 memcpy (&search_buf[0], &search_buf[chunk_size], keep_len);
2396 nr_to_read = std::min (search_space_len - keep_len,
2397 (ULONGEST) chunk_size);
2399 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2400 &search_buf[keep_len], read_addr,
2401 nr_to_read) != nr_to_read)
2403 warning (_("Unable to access %s bytes of target "
2404 "memory at %s, halting search."),
2405 plongest (nr_to_read),
2406 hex_string (read_addr));
2410 start_addr += chunk_size;
2419 /* Default implementation of memory-searching. */
2422 default_search_memory (struct target_ops *self,
2423 CORE_ADDR start_addr, ULONGEST search_space_len,
2424 const gdb_byte *pattern, ULONGEST pattern_len,
2425 CORE_ADDR *found_addrp)
2427 /* Start over from the top of the target stack. */
2428 return simple_search_memory (current_target.beneath,
2429 start_addr, search_space_len,
2430 pattern, pattern_len, found_addrp);
2433 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2434 sequence of bytes in PATTERN with length PATTERN_LEN.
2436 The result is 1 if found, 0 if not found, and -1 if there was an error
2437 requiring halting of the search (e.g. memory read error).
2438 If the pattern is found the address is recorded in FOUND_ADDRP. */
2441 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2442 const gdb_byte *pattern, ULONGEST pattern_len,
2443 CORE_ADDR *found_addrp)
2445 return current_target.to_search_memory (¤t_target, start_addr,
2447 pattern, pattern_len, found_addrp);
2450 /* Look through the currently pushed targets. If none of them will
2451 be able to restart the currently running process, issue an error
2455 target_require_runnable (void)
2457 struct target_ops *t;
2459 for (t = target_stack; t != NULL; t = t->beneath)
2461 /* If this target knows how to create a new program, then
2462 assume we will still be able to after killing the current
2463 one. Either killing and mourning will not pop T, or else
2464 find_default_run_target will find it again. */
2465 if (t->to_create_inferior != NULL)
2468 /* Do not worry about targets at certain strata that can not
2469 create inferiors. Assume they will be pushed again if
2470 necessary, and continue to the process_stratum. */
2471 if (t->to_stratum == thread_stratum
2472 || t->to_stratum == record_stratum
2473 || t->to_stratum == arch_stratum)
2476 error (_("The \"%s\" target does not support \"run\". "
2477 "Try \"help target\" or \"continue\"."),
2481 /* This function is only called if the target is running. In that
2482 case there should have been a process_stratum target and it
2483 should either know how to create inferiors, or not... */
2484 internal_error (__FILE__, __LINE__, _("No targets found"));
2487 /* Whether GDB is allowed to fall back to the default run target for
2488 "run", "attach", etc. when no target is connected yet. */
2489 static int auto_connect_native_target = 1;
2492 show_auto_connect_native_target (struct ui_file *file, int from_tty,
2493 struct cmd_list_element *c, const char *value)
2495 fprintf_filtered (file,
2496 _("Whether GDB may automatically connect to the "
2497 "native target is %s.\n"),
2501 /* Look through the list of possible targets for a target that can
2502 execute a run or attach command without any other data. This is
2503 used to locate the default process stratum.
2505 If DO_MESG is not NULL, the result is always valid (error() is
2506 called for errors); else, return NULL on error. */
2508 static struct target_ops *
2509 find_default_run_target (const char *do_mesg)
2511 struct target_ops *runable = NULL;
2513 if (auto_connect_native_target)
2515 struct target_ops *t;
2519 for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i)
2521 if (t->to_can_run != delegate_can_run && target_can_run (t))
2532 if (runable == NULL)
2535 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2546 find_attach_target (void)
2548 struct target_ops *t;
2550 /* If a target on the current stack can attach, use it. */
2551 for (t = current_target.beneath; t != NULL; t = t->beneath)
2553 if (t->to_attach != NULL)
2557 /* Otherwise, use the default run target for attaching. */
2559 t = find_default_run_target ("attach");
2567 find_run_target (void)
2569 struct target_ops *t;
2571 /* If a target on the current stack can attach, use it. */
2572 for (t = current_target.beneath; t != NULL; t = t->beneath)
2574 if (t->to_create_inferior != NULL)
2578 /* Otherwise, use the default run target. */
2580 t = find_default_run_target ("run");
2585 /* Implement the "info proc" command. */
2588 target_info_proc (const char *args, enum info_proc_what what)
2590 struct target_ops *t;
2592 /* If we're already connected to something that can get us OS
2593 related data, use it. Otherwise, try using the native
2595 if (current_target.to_stratum >= process_stratum)
2596 t = current_target.beneath;
2598 t = find_default_run_target (NULL);
2600 for (; t != NULL; t = t->beneath)
2602 if (t->to_info_proc != NULL)
2604 t->to_info_proc (t, args, what);
2607 fprintf_unfiltered (gdb_stdlog,
2608 "target_info_proc (\"%s\", %d)\n", args, what);
2618 find_default_supports_disable_randomization (struct target_ops *self)
2620 struct target_ops *t;
2622 t = find_default_run_target (NULL);
2623 if (t && t->to_supports_disable_randomization)
2624 return (t->to_supports_disable_randomization) (t);
2629 target_supports_disable_randomization (void)
2631 struct target_ops *t;
2633 for (t = ¤t_target; t != NULL; t = t->beneath)
2634 if (t->to_supports_disable_randomization)
2635 return t->to_supports_disable_randomization (t);
2640 /* See target/target.h. */
2643 target_supports_multi_process (void)
2645 return (*current_target.to_supports_multi_process) (¤t_target);
2650 gdb::unique_xmalloc_ptr<char>
2651 target_get_osdata (const char *type)
2653 struct target_ops *t;
2655 /* If we're already connected to something that can get us OS
2656 related data, use it. Otherwise, try using the native
2658 if (current_target.to_stratum >= process_stratum)
2659 t = current_target.beneath;
2661 t = find_default_run_target ("get OS data");
2666 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2669 static struct address_space *
2670 default_thread_address_space (struct target_ops *self, ptid_t ptid)
2672 struct inferior *inf;
2674 /* Fall-back to the "main" address space of the inferior. */
2675 inf = find_inferior_ptid (ptid);
2677 if (inf == NULL || inf->aspace == NULL)
2678 internal_error (__FILE__, __LINE__,
2679 _("Can't determine the current "
2680 "address space of thread %s\n"),
2681 target_pid_to_str (ptid));
2686 /* Determine the current address space of thread PTID. */
2688 struct address_space *
2689 target_thread_address_space (ptid_t ptid)
2691 struct address_space *aspace;
2693 aspace = current_target.to_thread_address_space (¤t_target, ptid);
2694 gdb_assert (aspace != NULL);
2700 /* Target file operations. */
2702 static struct target_ops *
2703 default_fileio_target (void)
2705 /* If we're already connected to something that can perform
2706 file I/O, use it. Otherwise, try using the native target. */
2707 if (current_target.to_stratum >= process_stratum)
2708 return current_target.beneath;
2710 return find_default_run_target ("file I/O");
2713 /* File handle for target file operations. */
2717 /* The target on which this file is open. */
2718 struct target_ops *t;
2720 /* The file descriptor on the target. */
2724 DEF_VEC_O (fileio_fh_t);
2726 /* Vector of currently open file handles. The value returned by
2727 target_fileio_open and passed as the FD argument to other
2728 target_fileio_* functions is an index into this vector. This
2729 vector's entries are never freed; instead, files are marked as
2730 closed, and the handle becomes available for reuse. */
2731 static VEC (fileio_fh_t) *fileio_fhandles;
2733 /* Macro to check whether a fileio_fh_t represents a closed file. */
2734 #define is_closed_fileio_fh(fd) ((fd) < 0)
2736 /* Index into fileio_fhandles of the lowest handle that might be
2737 closed. This permits handle reuse without searching the whole
2738 list each time a new file is opened. */
2739 static int lowest_closed_fd;
2741 /* Acquire a target fileio file descriptor. */
2744 acquire_fileio_fd (struct target_ops *t, int fd)
2748 gdb_assert (!is_closed_fileio_fh (fd));
2750 /* Search for closed handles to reuse. */
2752 VEC_iterate (fileio_fh_t, fileio_fhandles,
2753 lowest_closed_fd, fh);
2755 if (is_closed_fileio_fh (fh->fd))
2758 /* Push a new handle if no closed handles were found. */
2759 if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles))
2760 fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL);
2762 /* Fill in the handle. */
2766 /* Return its index, and start the next lookup at
2768 return lowest_closed_fd++;
2771 /* Release a target fileio file descriptor. */
2774 release_fileio_fd (int fd, fileio_fh_t *fh)
2777 lowest_closed_fd = std::min (lowest_closed_fd, fd);
2780 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2782 #define fileio_fd_to_fh(fd) \
2783 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2785 /* Helper for target_fileio_open and
2786 target_fileio_open_warn_if_slow. */
2789 target_fileio_open_1 (struct inferior *inf, const char *filename,
2790 int flags, int mode, int warn_if_slow,
2793 struct target_ops *t;
2795 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2797 if (t->to_fileio_open != NULL)
2799 int fd = t->to_fileio_open (t, inf, filename, flags, mode,
2800 warn_if_slow, target_errno);
2805 fd = acquire_fileio_fd (t, fd);
2808 fprintf_unfiltered (gdb_stdlog,
2809 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2811 inf == NULL ? 0 : inf->num,
2812 filename, flags, mode,
2814 fd != -1 ? 0 : *target_errno);
2819 *target_errno = FILEIO_ENOSYS;
2826 target_fileio_open (struct inferior *inf, const char *filename,
2827 int flags, int mode, int *target_errno)
2829 return target_fileio_open_1 (inf, filename, flags, mode, 0,
2836 target_fileio_open_warn_if_slow (struct inferior *inf,
2837 const char *filename,
2838 int flags, int mode, int *target_errno)
2840 return target_fileio_open_1 (inf, filename, flags, mode, 1,
2847 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2848 ULONGEST offset, int *target_errno)
2850 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2853 if (is_closed_fileio_fh (fh->fd))
2854 *target_errno = EBADF;
2856 ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf,
2857 len, offset, target_errno);
2860 fprintf_unfiltered (gdb_stdlog,
2861 "target_fileio_pwrite (%d,...,%d,%s) "
2863 fd, len, pulongest (offset),
2864 ret, ret != -1 ? 0 : *target_errno);
2871 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
2872 ULONGEST offset, int *target_errno)
2874 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2877 if (is_closed_fileio_fh (fh->fd))
2878 *target_errno = EBADF;
2880 ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf,
2881 len, offset, target_errno);
2884 fprintf_unfiltered (gdb_stdlog,
2885 "target_fileio_pread (%d,...,%d,%s) "
2887 fd, len, pulongest (offset),
2888 ret, ret != -1 ? 0 : *target_errno);
2895 target_fileio_fstat (int fd, struct stat *sb, int *target_errno)
2897 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2900 if (is_closed_fileio_fh (fh->fd))
2901 *target_errno = EBADF;
2903 ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno);
2906 fprintf_unfiltered (gdb_stdlog,
2907 "target_fileio_fstat (%d) = %d (%d)\n",
2908 fd, ret, ret != -1 ? 0 : *target_errno);
2915 target_fileio_close (int fd, int *target_errno)
2917 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2920 if (is_closed_fileio_fh (fh->fd))
2921 *target_errno = EBADF;
2924 ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno);
2925 release_fileio_fd (fd, fh);
2929 fprintf_unfiltered (gdb_stdlog,
2930 "target_fileio_close (%d) = %d (%d)\n",
2931 fd, ret, ret != -1 ? 0 : *target_errno);
2938 target_fileio_unlink (struct inferior *inf, const char *filename,
2941 struct target_ops *t;
2943 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2945 if (t->to_fileio_unlink != NULL)
2947 int ret = t->to_fileio_unlink (t, inf, filename,
2951 fprintf_unfiltered (gdb_stdlog,
2952 "target_fileio_unlink (%d,%s)"
2954 inf == NULL ? 0 : inf->num, filename,
2955 ret, ret != -1 ? 0 : *target_errno);
2960 *target_errno = FILEIO_ENOSYS;
2967 target_fileio_readlink (struct inferior *inf, const char *filename,
2970 struct target_ops *t;
2972 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2974 if (t->to_fileio_readlink != NULL)
2976 char *ret = t->to_fileio_readlink (t, inf, filename,
2980 fprintf_unfiltered (gdb_stdlog,
2981 "target_fileio_readlink (%d,%s)"
2983 inf == NULL ? 0 : inf->num,
2984 filename, ret? ret : "(nil)",
2985 ret? 0 : *target_errno);
2990 *target_errno = FILEIO_ENOSYS;
2995 target_fileio_close_cleanup (void *opaque)
2997 int fd = *(int *) opaque;
3000 target_fileio_close (fd, &target_errno);
3003 /* Read target file FILENAME, in the filesystem as seen by INF. If
3004 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3005 remote targets, the remote stub). Store the result in *BUF_P and
3006 return the size of the transferred data. PADDING additional bytes
3007 are available in *BUF_P. This is a helper function for
3008 target_fileio_read_alloc; see the declaration of that function for
3009 more information. */
3012 target_fileio_read_alloc_1 (struct inferior *inf, const char *filename,
3013 gdb_byte **buf_p, int padding)
3015 struct cleanup *close_cleanup;
3016 size_t buf_alloc, buf_pos;
3022 fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700,
3027 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3029 /* Start by reading up to 4K at a time. The target will throttle
3030 this number down if necessary. */
3032 buf = (gdb_byte *) xmalloc (buf_alloc);
3036 n = target_fileio_pread (fd, &buf[buf_pos],
3037 buf_alloc - buf_pos - padding, buf_pos,
3041 /* An error occurred. */
3042 do_cleanups (close_cleanup);
3048 /* Read all there was. */
3049 do_cleanups (close_cleanup);
3059 /* If the buffer is filling up, expand it. */
3060 if (buf_alloc < buf_pos * 2)
3063 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
3073 target_fileio_read_alloc (struct inferior *inf, const char *filename,
3076 return target_fileio_read_alloc_1 (inf, filename, buf_p, 0);
3081 gdb::unique_xmalloc_ptr<char>
3082 target_fileio_read_stralloc (struct inferior *inf, const char *filename)
3086 LONGEST i, transferred;
3088 transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1);
3089 bufstr = (char *) buffer;
3091 if (transferred < 0)
3092 return gdb::unique_xmalloc_ptr<char> (nullptr);
3094 if (transferred == 0)
3095 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
3097 bufstr[transferred] = 0;
3099 /* Check for embedded NUL bytes; but allow trailing NULs. */
3100 for (i = strlen (bufstr); i < transferred; i++)
3103 warning (_("target file %s "
3104 "contained unexpected null characters"),
3109 return gdb::unique_xmalloc_ptr<char> (bufstr);
3114 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3115 CORE_ADDR addr, int len)
3117 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3121 default_watchpoint_addr_within_range (struct target_ops *target,
3123 CORE_ADDR start, int length)
3125 return addr >= start && addr < start + length;
3128 static struct gdbarch *
3129 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3131 inferior *inf = find_inferior_ptid (ptid);
3132 gdb_assert (inf != NULL);
3133 return inf->gdbarch;
3137 return_zero (struct target_ops *ignore)
3143 return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2)
3149 * Find the next target down the stack from the specified target.
3153 find_target_beneath (struct target_ops *t)
3161 find_target_at (enum strata stratum)
3163 struct target_ops *t;
3165 for (t = current_target.beneath; t != NULL; t = t->beneath)
3166 if (t->to_stratum == stratum)
3177 target_announce_detach (int from_tty)
3180 const char *exec_file;
3185 exec_file = get_exec_file (0);
3186 if (exec_file == NULL)
3189 pid = ptid_get_pid (inferior_ptid);
3190 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
3191 target_pid_to_str (pid_to_ptid (pid)));
3192 gdb_flush (gdb_stdout);
3195 /* The inferior process has died. Long live the inferior! */
3198 generic_mourn_inferior (void)
3202 ptid = inferior_ptid;
3203 inferior_ptid = null_ptid;
3205 /* Mark breakpoints uninserted in case something tries to delete a
3206 breakpoint while we delete the inferior's threads (which would
3207 fail, since the inferior is long gone). */
3208 mark_breakpoints_out ();
3210 if (!ptid_equal (ptid, null_ptid))
3212 int pid = ptid_get_pid (ptid);
3213 exit_inferior (pid);
3216 /* Note this wipes step-resume breakpoints, so needs to be done
3217 after exit_inferior, which ends up referencing the step-resume
3218 breakpoints through clear_thread_inferior_resources. */
3219 breakpoint_init_inferior (inf_exited);
3221 registers_changed ();
3223 reopen_exec_file ();
3224 reinit_frame_cache ();
3226 if (deprecated_detach_hook)
3227 deprecated_detach_hook ();
3230 /* Convert a normal process ID to a string. Returns the string in a
3234 normal_pid_to_str (ptid_t ptid)
3236 static char buf[32];
3238 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3243 default_pid_to_str (struct target_ops *ops, ptid_t ptid)
3245 return normal_pid_to_str (ptid);
3248 /* Error-catcher for target_find_memory_regions. */
3250 dummy_find_memory_regions (struct target_ops *self,
3251 find_memory_region_ftype ignore1, void *ignore2)
3253 error (_("Command not implemented for this target."));
3257 /* Error-catcher for target_make_corefile_notes. */
3259 dummy_make_corefile_notes (struct target_ops *self,
3260 bfd *ignore1, int *ignore2)
3262 error (_("Command not implemented for this target."));
3266 /* Set up the handful of non-empty slots needed by the dummy target
3270 init_dummy_target (void)
3272 dummy_target.to_shortname = "None";
3273 dummy_target.to_longname = "None";
3274 dummy_target.to_doc = "";
3275 dummy_target.to_supports_disable_randomization
3276 = find_default_supports_disable_randomization;
3277 dummy_target.to_stratum = dummy_stratum;
3278 dummy_target.to_has_all_memory = return_zero;
3279 dummy_target.to_has_memory = return_zero;
3280 dummy_target.to_has_stack = return_zero;
3281 dummy_target.to_has_registers = return_zero;
3282 dummy_target.to_has_execution = return_zero_has_execution;
3283 dummy_target.to_magic = OPS_MAGIC;
3285 install_dummy_methods (&dummy_target);
3290 target_close (struct target_ops *targ)
3292 gdb_assert (!target_is_pushed (targ));
3294 if (targ->to_xclose != NULL)
3295 targ->to_xclose (targ);
3296 else if (targ->to_close != NULL)
3297 targ->to_close (targ);
3300 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3304 target_thread_alive (ptid_t ptid)
3306 return current_target.to_thread_alive (¤t_target, ptid);
3310 target_update_thread_list (void)
3312 current_target.to_update_thread_list (¤t_target);
3316 target_stop (ptid_t ptid)
3320 warning (_("May not interrupt or stop the target, ignoring attempt"));
3324 (*current_target.to_stop) (¤t_target, ptid);
3328 target_interrupt (ptid_t ptid)
3332 warning (_("May not interrupt or stop the target, ignoring attempt"));
3336 (*current_target.to_interrupt) (¤t_target, ptid);
3342 target_pass_ctrlc (void)
3344 (*current_target.to_pass_ctrlc) (¤t_target);
3350 default_target_pass_ctrlc (struct target_ops *ops)
3352 target_interrupt (inferior_ptid);
3355 /* See target/target.h. */
3358 target_stop_and_wait (ptid_t ptid)
3360 struct target_waitstatus status;
3361 int was_non_stop = non_stop;
3366 memset (&status, 0, sizeof (status));
3367 target_wait (ptid, &status, 0);
3369 non_stop = was_non_stop;
3372 /* See target/target.h. */
3375 target_continue_no_signal (ptid_t ptid)
3377 target_resume (ptid, 0, GDB_SIGNAL_0);
3380 /* See target/target.h. */
3383 target_continue (ptid_t ptid, enum gdb_signal signal)
3385 target_resume (ptid, 0, signal);
3388 /* Concatenate ELEM to LIST, a comma separate list, and return the
3389 result. The LIST incoming argument is released. */
3392 str_comma_list_concat_elem (char *list, const char *elem)
3395 return xstrdup (elem);
3397 return reconcat (list, list, ", ", elem, (char *) NULL);
3400 /* Helper for target_options_to_string. If OPT is present in
3401 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3402 Returns the new resulting string. OPT is removed from
3406 do_option (int *target_options, char *ret,
3407 int opt, const char *opt_str)
3409 if ((*target_options & opt) != 0)
3411 ret = str_comma_list_concat_elem (ret, opt_str);
3412 *target_options &= ~opt;
3419 target_options_to_string (int target_options)
3423 #define DO_TARG_OPTION(OPT) \
3424 ret = do_option (&target_options, ret, OPT, #OPT)
3426 DO_TARG_OPTION (TARGET_WNOHANG);
3428 if (target_options != 0)
3429 ret = str_comma_list_concat_elem (ret, "unknown???");
3437 target_fetch_registers (struct regcache *regcache, int regno)
3439 current_target.to_fetch_registers (¤t_target, regcache, regno);
3441 regcache->debug_print_register ("target_fetch_registers", regno);
3445 target_store_registers (struct regcache *regcache, int regno)
3447 if (!may_write_registers)
3448 error (_("Writing to registers is not allowed (regno %d)"), regno);
3450 current_target.to_store_registers (¤t_target, regcache, regno);
3453 regcache->debug_print_register ("target_store_registers", regno);
3458 target_core_of_thread (ptid_t ptid)
3460 return current_target.to_core_of_thread (¤t_target, ptid);
3464 simple_verify_memory (struct target_ops *ops,
3465 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
3467 LONGEST total_xfered = 0;
3469 while (total_xfered < size)
3471 ULONGEST xfered_len;
3472 enum target_xfer_status status;
3474 ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered);
3476 status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
3477 buf, NULL, lma + total_xfered, howmuch,
3479 if (status == TARGET_XFER_OK
3480 && memcmp (data + total_xfered, buf, xfered_len) == 0)
3482 total_xfered += xfered_len;
3491 /* Default implementation of memory verification. */
3494 default_verify_memory (struct target_ops *self,
3495 const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3497 /* Start over from the top of the target stack. */
3498 return simple_verify_memory (current_target.beneath,
3499 data, memaddr, size);
3503 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3505 return current_target.to_verify_memory (¤t_target,
3506 data, memaddr, size);
3509 /* The documentation for this function is in its prototype declaration in
3513 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3514 enum target_hw_bp_type rw)
3516 return current_target.to_insert_mask_watchpoint (¤t_target,
3520 /* The documentation for this function is in its prototype declaration in
3524 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3525 enum target_hw_bp_type rw)
3527 return current_target.to_remove_mask_watchpoint (¤t_target,
3531 /* The documentation for this function is in its prototype declaration
3535 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3537 return current_target.to_masked_watch_num_registers (¤t_target,
3541 /* The documentation for this function is in its prototype declaration
3545 target_ranged_break_num_registers (void)
3547 return current_target.to_ranged_break_num_registers (¤t_target);
3553 target_supports_btrace (enum btrace_format format)
3555 return current_target.to_supports_btrace (¤t_target, format);
3560 struct btrace_target_info *
3561 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
3563 return current_target.to_enable_btrace (¤t_target, ptid, conf);
3569 target_disable_btrace (struct btrace_target_info *btinfo)
3571 current_target.to_disable_btrace (¤t_target, btinfo);
3577 target_teardown_btrace (struct btrace_target_info *btinfo)
3579 current_target.to_teardown_btrace (¤t_target, btinfo);
3585 target_read_btrace (struct btrace_data *btrace,
3586 struct btrace_target_info *btinfo,
3587 enum btrace_read_type type)
3589 return current_target.to_read_btrace (¤t_target, btrace, btinfo, type);
3594 const struct btrace_config *
3595 target_btrace_conf (const struct btrace_target_info *btinfo)
3597 return current_target.to_btrace_conf (¤t_target, btinfo);
3603 target_stop_recording (void)
3605 current_target.to_stop_recording (¤t_target);
3611 target_save_record (const char *filename)
3613 current_target.to_save_record (¤t_target, filename);
3619 target_supports_delete_record (void)
3621 struct target_ops *t;
3623 for (t = current_target.beneath; t != NULL; t = t->beneath)
3624 if (t->to_delete_record != delegate_delete_record
3625 && t->to_delete_record != tdefault_delete_record)
3634 target_delete_record (void)
3636 current_target.to_delete_record (¤t_target);
3642 target_record_method (ptid_t ptid)
3644 return current_target.to_record_method (¤t_target, ptid);
3650 target_record_is_replaying (ptid_t ptid)
3652 return current_target.to_record_is_replaying (¤t_target, ptid);
3658 target_record_will_replay (ptid_t ptid, int dir)
3660 return current_target.to_record_will_replay (¤t_target, ptid, dir);
3666 target_record_stop_replaying (void)
3668 current_target.to_record_stop_replaying (¤t_target);
3674 target_goto_record_begin (void)
3676 current_target.to_goto_record_begin (¤t_target);
3682 target_goto_record_end (void)
3684 current_target.to_goto_record_end (¤t_target);
3690 target_goto_record (ULONGEST insn)
3692 current_target.to_goto_record (¤t_target, insn);
3698 target_insn_history (int size, gdb_disassembly_flags flags)
3700 current_target.to_insn_history (¤t_target, size, flags);
3706 target_insn_history_from (ULONGEST from, int size,
3707 gdb_disassembly_flags flags)
3709 current_target.to_insn_history_from (¤t_target, from, size, flags);
3715 target_insn_history_range (ULONGEST begin, ULONGEST end,
3716 gdb_disassembly_flags flags)
3718 current_target.to_insn_history_range (¤t_target, begin, end, flags);
3724 target_call_history (int size, int flags)
3726 current_target.to_call_history (¤t_target, size, flags);
3732 target_call_history_from (ULONGEST begin, int size, int flags)
3734 current_target.to_call_history_from (¤t_target, begin, size, flags);
3740 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
3742 current_target.to_call_history_range (¤t_target, begin, end, flags);
3747 const struct frame_unwind *
3748 target_get_unwinder (void)
3750 return current_target.to_get_unwinder (¤t_target);
3755 const struct frame_unwind *
3756 target_get_tailcall_unwinder (void)
3758 return current_target.to_get_tailcall_unwinder (¤t_target);
3764 target_prepare_to_generate_core (void)
3766 current_target.to_prepare_to_generate_core (¤t_target);
3772 target_done_generating_core (void)
3774 current_target.to_done_generating_core (¤t_target);
3778 setup_target_debug (void)
3780 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3782 init_debug_target (¤t_target);
3786 static char targ_desc[] =
3787 "Names of targets and files being debugged.\nShows the entire \
3788 stack of targets currently in use (including the exec-file,\n\
3789 core-file, and process, if any), as well as the symbol file name.";
3792 default_rcmd (struct target_ops *self, const char *command,
3793 struct ui_file *output)
3795 error (_("\"monitor\" command not supported by this target."));
3799 do_monitor_command (const char *cmd, int from_tty)
3801 target_rcmd (cmd, gdb_stdtarg);
3804 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3808 flash_erase_command (const char *cmd, int from_tty)
3810 /* Used to communicate termination of flash operations to the target. */
3811 bool found_flash_region = false;
3812 struct gdbarch *gdbarch = target_gdbarch ();
3814 std::vector<mem_region> mem_regions = target_memory_map ();
3816 /* Iterate over all memory regions. */
3817 for (const mem_region &m : mem_regions)
3819 /* Is this a flash memory region? */
3820 if (m.attrib.mode == MEM_FLASH)
3822 found_flash_region = true;
3823 target_flash_erase (m.lo, m.hi - m.lo);
3825 ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions");
3827 current_uiout->message (_("Erasing flash memory region at address "));
3828 current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo));
3829 current_uiout->message (", size = ");
3830 current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo));
3831 current_uiout->message ("\n");
3835 /* Did we do any flash operations? If so, we need to finalize them. */
3836 if (found_flash_region)
3837 target_flash_done ();
3839 current_uiout->message (_("No flash memory regions found.\n"));
3842 /* Print the name of each layers of our target stack. */
3845 maintenance_print_target_stack (const char *cmd, int from_tty)
3847 struct target_ops *t;
3849 printf_filtered (_("The current target stack is:\n"));
3851 for (t = target_stack; t != NULL; t = t->beneath)
3853 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3860 target_async (int enable)
3862 infrun_async (enable);
3863 current_target.to_async (¤t_target, enable);
3869 target_thread_events (int enable)
3871 current_target.to_thread_events (¤t_target, enable);
3874 /* Controls if targets can report that they can/are async. This is
3875 just for maintainers to use when debugging gdb. */
3876 int target_async_permitted = 1;
3878 /* The set command writes to this variable. If the inferior is
3879 executing, target_async_permitted is *not* updated. */
3880 static int target_async_permitted_1 = 1;
3883 maint_set_target_async_command (const char *args, int from_tty,
3884 struct cmd_list_element *c)
3886 if (have_live_inferiors ())
3888 target_async_permitted_1 = target_async_permitted;
3889 error (_("Cannot change this setting while the inferior is running."));
3892 target_async_permitted = target_async_permitted_1;
3896 maint_show_target_async_command (struct ui_file *file, int from_tty,
3897 struct cmd_list_element *c,
3900 fprintf_filtered (file,
3901 _("Controlling the inferior in "
3902 "asynchronous mode is %s.\n"), value);
3905 /* Return true if the target operates in non-stop mode even with "set
3909 target_always_non_stop_p (void)
3911 return current_target.to_always_non_stop_p (¤t_target);
3917 target_is_non_stop_p (void)
3920 || target_non_stop_enabled == AUTO_BOOLEAN_TRUE
3921 || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO
3922 && target_always_non_stop_p ()));
3925 /* Controls if targets can report that they always run in non-stop
3926 mode. This is just for maintainers to use when debugging gdb. */
3927 enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO;
3929 /* The set command writes to this variable. If the inferior is
3930 executing, target_non_stop_enabled is *not* updated. */
3931 static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO;
3933 /* Implementation of "maint set target-non-stop". */
3936 maint_set_target_non_stop_command (const char *args, int from_tty,
3937 struct cmd_list_element *c)
3939 if (have_live_inferiors ())
3941 target_non_stop_enabled_1 = target_non_stop_enabled;
3942 error (_("Cannot change this setting while the inferior is running."));
3945 target_non_stop_enabled = target_non_stop_enabled_1;
3948 /* Implementation of "maint show target-non-stop". */
3951 maint_show_target_non_stop_command (struct ui_file *file, int from_tty,
3952 struct cmd_list_element *c,
3955 if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO)
3956 fprintf_filtered (file,
3957 _("Whether the target is always in non-stop mode "
3958 "is %s (currently %s).\n"), value,
3959 target_always_non_stop_p () ? "on" : "off");
3961 fprintf_filtered (file,
3962 _("Whether the target is always in non-stop mode "
3963 "is %s.\n"), value);
3966 /* Temporary copies of permission settings. */
3968 static int may_write_registers_1 = 1;
3969 static int may_write_memory_1 = 1;
3970 static int may_insert_breakpoints_1 = 1;
3971 static int may_insert_tracepoints_1 = 1;
3972 static int may_insert_fast_tracepoints_1 = 1;
3973 static int may_stop_1 = 1;
3975 /* Make the user-set values match the real values again. */
3978 update_target_permissions (void)
3980 may_write_registers_1 = may_write_registers;
3981 may_write_memory_1 = may_write_memory;
3982 may_insert_breakpoints_1 = may_insert_breakpoints;
3983 may_insert_tracepoints_1 = may_insert_tracepoints;
3984 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3985 may_stop_1 = may_stop;
3988 /* The one function handles (most of) the permission flags in the same
3992 set_target_permissions (const char *args, int from_tty,
3993 struct cmd_list_element *c)
3995 if (target_has_execution)
3997 update_target_permissions ();
3998 error (_("Cannot change this setting while the inferior is running."));
4001 /* Make the real values match the user-changed values. */
4002 may_write_registers = may_write_registers_1;
4003 may_insert_breakpoints = may_insert_breakpoints_1;
4004 may_insert_tracepoints = may_insert_tracepoints_1;
4005 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4006 may_stop = may_stop_1;
4007 update_observer_mode ();
4010 /* Set memory write permission independently of observer mode. */
4013 set_write_memory_permission (const char *args, int from_tty,
4014 struct cmd_list_element *c)
4016 /* Make the real values match the user-changed values. */
4017 may_write_memory = may_write_memory_1;
4018 update_observer_mode ();
4023 initialize_targets (void)
4025 init_dummy_target ();
4026 push_target (&dummy_target);
4028 add_info ("target", info_target_command, targ_desc);
4029 add_info ("files", info_target_command, targ_desc);
4031 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4032 Set target debugging."), _("\
4033 Show target debugging."), _("\
4034 When non-zero, target debugging is enabled. Higher numbers are more\n\
4038 &setdebuglist, &showdebuglist);
4040 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4041 &trust_readonly, _("\
4042 Set mode for reading from readonly sections."), _("\
4043 Show mode for reading from readonly sections."), _("\
4044 When this mode is on, memory reads from readonly sections (such as .text)\n\
4045 will be read from the object file instead of from the target. This will\n\
4046 result in significant performance improvement for remote targets."),
4048 show_trust_readonly,
4049 &setlist, &showlist);
4051 add_com ("monitor", class_obscure, do_monitor_command,
4052 _("Send a command to the remote monitor (remote targets only)."));
4054 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4055 _("Print the name of each layer of the internal target stack."),
4056 &maintenanceprintlist);
4058 add_setshow_boolean_cmd ("target-async", no_class,
4059 &target_async_permitted_1, _("\
4060 Set whether gdb controls the inferior in asynchronous mode."), _("\
4061 Show whether gdb controls the inferior in asynchronous mode."), _("\
4062 Tells gdb whether to control the inferior in asynchronous mode."),
4063 maint_set_target_async_command,
4064 maint_show_target_async_command,
4065 &maintenance_set_cmdlist,
4066 &maintenance_show_cmdlist);
4068 add_setshow_auto_boolean_cmd ("target-non-stop", no_class,
4069 &target_non_stop_enabled_1, _("\
4070 Set whether gdb always controls the inferior in non-stop mode."), _("\
4071 Show whether gdb always controls the inferior in non-stop mode."), _("\
4072 Tells gdb whether to control the inferior in non-stop mode."),
4073 maint_set_target_non_stop_command,
4074 maint_show_target_non_stop_command,
4075 &maintenance_set_cmdlist,
4076 &maintenance_show_cmdlist);
4078 add_setshow_boolean_cmd ("may-write-registers", class_support,
4079 &may_write_registers_1, _("\
4080 Set permission to write into registers."), _("\
4081 Show permission to write into registers."), _("\
4082 When this permission is on, GDB may write into the target's registers.\n\
4083 Otherwise, any sort of write attempt will result in an error."),
4084 set_target_permissions, NULL,
4085 &setlist, &showlist);
4087 add_setshow_boolean_cmd ("may-write-memory", class_support,
4088 &may_write_memory_1, _("\
4089 Set permission to write into target memory."), _("\
4090 Show permission to write into target memory."), _("\
4091 When this permission is on, GDB may write into the target's memory.\n\
4092 Otherwise, any sort of write attempt will result in an error."),
4093 set_write_memory_permission, NULL,
4094 &setlist, &showlist);
4096 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4097 &may_insert_breakpoints_1, _("\
4098 Set permission to insert breakpoints in the target."), _("\
4099 Show permission to insert breakpoints in the target."), _("\
4100 When this permission is on, GDB may insert breakpoints in the program.\n\
4101 Otherwise, any sort of insertion attempt will result in an error."),
4102 set_target_permissions, NULL,
4103 &setlist, &showlist);
4105 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4106 &may_insert_tracepoints_1, _("\
4107 Set permission to insert tracepoints in the target."), _("\
4108 Show permission to insert tracepoints in the target."), _("\
4109 When this permission is on, GDB may insert tracepoints in the program.\n\
4110 Otherwise, any sort of insertion attempt will result in an error."),
4111 set_target_permissions, NULL,
4112 &setlist, &showlist);
4114 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4115 &may_insert_fast_tracepoints_1, _("\
4116 Set permission to insert fast tracepoints in the target."), _("\
4117 Show permission to insert fast tracepoints in the target."), _("\
4118 When this permission is on, GDB may insert fast tracepoints.\n\
4119 Otherwise, any sort of insertion attempt will result in an error."),
4120 set_target_permissions, NULL,
4121 &setlist, &showlist);
4123 add_setshow_boolean_cmd ("may-interrupt", class_support,
4125 Set permission to interrupt or signal the target."), _("\
4126 Show permission to interrupt or signal the target."), _("\
4127 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4128 Otherwise, any attempt to interrupt or stop will be ignored."),
4129 set_target_permissions, NULL,
4130 &setlist, &showlist);
4132 add_com ("flash-erase", no_class, flash_erase_command,
4133 _("Erase all flash memory regions."));
4135 add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
4136 &auto_connect_native_target, _("\
4137 Set whether GDB may automatically connect to the native target."), _("\
4138 Show whether GDB may automatically connect to the native target."), _("\
4139 When on, and GDB is not connected to a target yet, GDB\n\
4140 attempts \"run\" and other commands with the native target."),
4141 NULL, show_auto_connect_native_target,
4142 &setlist, &showlist);