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 info_target_command (char *, int);
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN;
55 static void default_terminal_info (struct target_ops *, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops *,
58 CORE_ADDR, CORE_ADDR, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops *,
63 static void default_rcmd (struct target_ops *, const char *, struct ui_file *);
65 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
68 static int default_follow_fork (struct target_ops *self, int follow_child,
71 static void default_mourn_inferior (struct target_ops *self);
73 static int default_search_memory (struct target_ops *ops,
75 ULONGEST search_space_len,
76 const gdb_byte *pattern,
78 CORE_ADDR *found_addrp);
80 static int default_verify_memory (struct target_ops *self,
82 CORE_ADDR memaddr, ULONGEST size);
84 static struct address_space *default_thread_address_space
85 (struct target_ops *self, ptid_t ptid);
87 static void tcomplain (void) ATTRIBUTE_NORETURN;
89 static int return_zero (struct target_ops *);
91 static int return_zero_has_execution (struct target_ops *, ptid_t);
93 static struct target_ops *find_default_run_target (const char *);
95 static struct gdbarch *default_thread_architecture (struct target_ops *ops,
98 static int dummy_find_memory_regions (struct target_ops *self,
99 find_memory_region_ftype ignore1,
102 static char *dummy_make_corefile_notes (struct target_ops *self,
103 bfd *ignore1, int *ignore2);
105 static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid);
107 static enum exec_direction_kind default_execution_direction
108 (struct target_ops *self);
110 static struct target_ops debug_target;
112 #include "target-delegates.c"
114 static void init_dummy_target (void);
116 static void update_current_target (void);
118 /* Vector of existing target structures. */
119 typedef struct target_ops *target_ops_p;
120 DEF_VEC_P (target_ops_p);
121 static VEC (target_ops_p) *target_structs;
123 /* The initial current target, so that there is always a semi-valid
126 static struct target_ops dummy_target;
128 /* Top of target stack. */
130 static struct target_ops *target_stack;
132 /* The target structure we are currently using to talk to a process
133 or file or whatever "inferior" we have. */
135 struct target_ops current_target;
137 /* Command list for target. */
139 static struct cmd_list_element *targetlist = NULL;
141 /* Nonzero if we should trust readonly sections from the
142 executable when reading memory. */
144 static int trust_readonly = 0;
146 /* Nonzero if we should show true memory content including
147 memory breakpoint inserted by gdb. */
149 static int show_memory_breakpoints = 0;
151 /* These globals control whether GDB attempts to perform these
152 operations; they are useful for targets that need to prevent
153 inadvertant disruption, such as in non-stop mode. */
155 int may_write_registers = 1;
157 int may_write_memory = 1;
159 int may_insert_breakpoints = 1;
161 int may_insert_tracepoints = 1;
163 int may_insert_fast_tracepoints = 1;
167 /* Non-zero if we want to see trace of target level stuff. */
169 static unsigned int targetdebug = 0;
172 set_targetdebug (char *args, int from_tty, struct cmd_list_element *c)
174 update_current_target ();
178 show_targetdebug (struct ui_file *file, int from_tty,
179 struct cmd_list_element *c, const char *value)
181 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
184 static void setup_target_debug (void);
186 /* The user just typed 'target' without the name of a target. */
189 target_command (const char *arg, int from_tty)
191 fputs_filtered ("Argument required (target name). Try `help target'\n",
195 /* Default target_has_* methods for process_stratum targets. */
198 default_child_has_all_memory (struct target_ops *ops)
200 /* If no inferior selected, then we can't read memory here. */
201 if (ptid_equal (inferior_ptid, null_ptid))
208 default_child_has_memory (struct target_ops *ops)
210 /* If no inferior selected, then we can't read memory here. */
211 if (ptid_equal (inferior_ptid, null_ptid))
218 default_child_has_stack (struct target_ops *ops)
220 /* If no inferior selected, there's no stack. */
221 if (ptid_equal (inferior_ptid, null_ptid))
228 default_child_has_registers (struct target_ops *ops)
230 /* Can't read registers from no inferior. */
231 if (ptid_equal (inferior_ptid, null_ptid))
238 default_child_has_execution (struct target_ops *ops, ptid_t the_ptid)
240 /* If there's no thread selected, then we can't make it run through
242 if (ptid_equal (the_ptid, null_ptid))
250 target_has_all_memory_1 (void)
252 struct target_ops *t;
254 for (t = current_target.beneath; t != NULL; t = t->beneath)
255 if (t->to_has_all_memory (t))
262 target_has_memory_1 (void)
264 struct target_ops *t;
266 for (t = current_target.beneath; t != NULL; t = t->beneath)
267 if (t->to_has_memory (t))
274 target_has_stack_1 (void)
276 struct target_ops *t;
278 for (t = current_target.beneath; t != NULL; t = t->beneath)
279 if (t->to_has_stack (t))
286 target_has_registers_1 (void)
288 struct target_ops *t;
290 for (t = current_target.beneath; t != NULL; t = t->beneath)
291 if (t->to_has_registers (t))
298 target_has_execution_1 (ptid_t the_ptid)
300 struct target_ops *t;
302 for (t = current_target.beneath; t != NULL; t = t->beneath)
303 if (t->to_has_execution (t, the_ptid))
310 target_has_execution_current (void)
312 return target_has_execution_1 (inferior_ptid);
315 /* Complete initialization of T. This ensures that various fields in
316 T are set, if needed by the target implementation. */
319 complete_target_initialization (struct target_ops *t)
321 /* Provide default values for all "must have" methods. */
323 if (t->to_has_all_memory == NULL)
324 t->to_has_all_memory = return_zero;
326 if (t->to_has_memory == NULL)
327 t->to_has_memory = return_zero;
329 if (t->to_has_stack == NULL)
330 t->to_has_stack = return_zero;
332 if (t->to_has_registers == NULL)
333 t->to_has_registers = return_zero;
335 if (t->to_has_execution == NULL)
336 t->to_has_execution = return_zero_has_execution;
338 /* These methods can be called on an unpushed target and so require
339 a default implementation if the target might plausibly be the
340 default run target. */
341 gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL
342 && t->to_supports_non_stop != NULL));
344 install_delegators (t);
347 /* This is used to implement the various target commands. */
350 open_target (char *args, int from_tty, struct cmd_list_element *command)
352 struct target_ops *ops = (struct target_ops *) get_cmd_context (command);
355 fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n",
358 ops->to_open (args, from_tty);
361 fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n",
362 ops->to_shortname, args, from_tty);
365 /* Add possible target architecture T to the list and add a new
366 command 'target T->to_shortname'. Set COMPLETER as the command's
367 completer if not NULL. */
370 add_target_with_completer (struct target_ops *t,
371 completer_ftype *completer)
373 struct cmd_list_element *c;
375 complete_target_initialization (t);
377 VEC_safe_push (target_ops_p, target_structs, t);
379 if (targetlist == NULL)
380 add_prefix_cmd ("target", class_run, target_command, _("\
381 Connect to a target machine or process.\n\
382 The first argument is the type or protocol of the target machine.\n\
383 Remaining arguments are interpreted by the target protocol. For more\n\
384 information on the arguments for a particular protocol, type\n\
385 `help target ' followed by the protocol name."),
386 &targetlist, "target ", 0, &cmdlist);
387 c = add_cmd (t->to_shortname, no_class, t->to_doc, &targetlist);
388 set_cmd_sfunc (c, open_target);
389 set_cmd_context (c, t);
390 if (completer != NULL)
391 set_cmd_completer (c, completer);
394 /* Add a possible target architecture to the list. */
397 add_target (struct target_ops *t)
399 add_target_with_completer (t, NULL);
405 add_deprecated_target_alias (struct target_ops *t, const char *alias)
407 struct cmd_list_element *c;
410 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
412 c = add_cmd (alias, no_class, t->to_doc, &targetlist);
413 set_cmd_sfunc (c, open_target);
414 set_cmd_context (c, t);
415 alt = xstrprintf ("target %s", t->to_shortname);
416 deprecate_cmd (c, alt);
424 current_target.to_kill (¤t_target);
428 target_load (const char *arg, int from_tty)
430 target_dcache_invalidate ();
431 (*current_target.to_load) (¤t_target, arg, from_tty);
436 enum target_terminal::terminal_state target_terminal::terminal_state
437 = target_terminal::terminal_is_ours;
439 /* See target/target.h. */
442 target_terminal::init (void)
444 (*current_target.to_terminal_init) (¤t_target);
446 terminal_state = terminal_is_ours;
449 /* See target/target.h. */
452 target_terminal::inferior (void)
454 struct ui *ui = current_ui;
456 /* A background resume (``run&'') should leave GDB in control of the
458 if (ui->prompt_state != PROMPT_BLOCKED)
461 /* Since we always run the inferior in the main console (unless "set
462 inferior-tty" is in effect), when some UI other than the main one
463 calls target_terminal::inferior, then we leave the main UI's
464 terminal settings as is. */
468 if (terminal_state == terminal_is_inferior)
471 /* If GDB is resuming the inferior in the foreground, install
472 inferior's terminal modes. */
473 (*current_target.to_terminal_inferior) (¤t_target);
474 terminal_state = terminal_is_inferior;
476 /* If the user hit C-c before, pretend that it was hit right
478 if (check_quit_flag ())
479 target_pass_ctrlc ();
482 /* See target/target.h. */
485 target_terminal::ours ()
487 struct ui *ui = current_ui;
489 /* See target_terminal::inferior. */
493 if (terminal_state == terminal_is_ours)
496 (*current_target.to_terminal_ours) (¤t_target);
497 terminal_state = terminal_is_ours;
500 /* See target/target.h. */
503 target_terminal::ours_for_output ()
505 struct ui *ui = current_ui;
507 /* See target_terminal::inferior. */
511 if (terminal_state != terminal_is_inferior)
513 (*current_target.to_terminal_ours_for_output) (¤t_target);
514 terminal_state = terminal_is_ours_for_output;
517 /* See target/target.h. */
520 target_terminal::info (const char *arg, int from_tty)
522 (*current_target.to_terminal_info) (¤t_target, arg, from_tty);
528 target_supports_terminal_ours (void)
530 struct target_ops *t;
532 for (t = current_target.beneath; t != NULL; t = t->beneath)
534 if (t->to_terminal_ours != delegate_terminal_ours
535 && t->to_terminal_ours != tdefault_terminal_ours)
545 error (_("You can't do that when your target is `%s'"),
546 current_target.to_shortname);
552 error (_("You can't do that without a process to debug."));
556 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
558 printf_unfiltered (_("No saved terminal information.\n"));
561 /* A default implementation for the to_get_ada_task_ptid target method.
563 This function builds the PTID by using both LWP and TID as part of
564 the PTID lwp and tid elements. The pid used is the pid of the
568 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
570 return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid);
573 static enum exec_direction_kind
574 default_execution_direction (struct target_ops *self)
576 if (!target_can_execute_reverse)
578 else if (!target_can_async_p ())
581 gdb_assert_not_reached ("\
582 to_execution_direction must be implemented for reverse async");
585 /* Go through the target stack from top to bottom, copying over zero
586 entries in current_target, then filling in still empty entries. In
587 effect, we are doing class inheritance through the pushed target
590 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
591 is currently implemented, is that it discards any knowledge of
592 which target an inherited method originally belonged to.
593 Consequently, new new target methods should instead explicitly and
594 locally search the target stack for the target that can handle the
598 update_current_target (void)
600 struct target_ops *t;
602 /* First, reset current's contents. */
603 memset (¤t_target, 0, sizeof (current_target));
605 /* Install the delegators. */
606 install_delegators (¤t_target);
608 current_target.to_stratum = target_stack->to_stratum;
610 #define INHERIT(FIELD, TARGET) \
611 if (!current_target.FIELD) \
612 current_target.FIELD = (TARGET)->FIELD
614 /* Do not add any new INHERITs here. Instead, use the delegation
615 mechanism provided by make-target-delegates. */
616 for (t = target_stack; t; t = t->beneath)
618 INHERIT (to_shortname, t);
619 INHERIT (to_longname, t);
620 INHERIT (to_attach_no_wait, t);
621 INHERIT (to_have_steppable_watchpoint, t);
622 INHERIT (to_have_continuable_watchpoint, t);
623 INHERIT (to_has_thread_control, t);
627 /* Finally, position the target-stack beneath the squashed
628 "current_target". That way code looking for a non-inherited
629 target method can quickly and simply find it. */
630 current_target.beneath = target_stack;
633 setup_target_debug ();
636 /* Push a new target type into the stack of the existing target accessors,
637 possibly superseding some of the existing accessors.
639 Rather than allow an empty stack, we always have the dummy target at
640 the bottom stratum, so we can call the function vectors without
644 push_target (struct target_ops *t)
646 struct target_ops **cur;
648 /* Check magic number. If wrong, it probably means someone changed
649 the struct definition, but not all the places that initialize one. */
650 if (t->to_magic != OPS_MAGIC)
652 fprintf_unfiltered (gdb_stderr,
653 "Magic number of %s target struct wrong\n",
655 internal_error (__FILE__, __LINE__,
656 _("failed internal consistency check"));
659 /* Find the proper stratum to install this target in. */
660 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
662 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
666 /* If there's already targets at this stratum, remove them. */
667 /* FIXME: cagney/2003-10-15: I think this should be popping all
668 targets to CUR, and not just those at this stratum level. */
669 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
671 /* There's already something at this stratum level. Close it,
672 and un-hook it from the stack. */
673 struct target_ops *tmp = (*cur);
675 (*cur) = (*cur)->beneath;
680 /* We have removed all targets in our stratum, now add the new one. */
684 update_current_target ();
687 /* Remove a target_ops vector from the stack, wherever it may be.
688 Return how many times it was removed (0 or 1). */
691 unpush_target (struct target_ops *t)
693 struct target_ops **cur;
694 struct target_ops *tmp;
696 if (t->to_stratum == dummy_stratum)
697 internal_error (__FILE__, __LINE__,
698 _("Attempt to unpush the dummy target"));
700 /* Look for the specified target. Note that we assume that a target
701 can only occur once in the target stack. */
703 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
709 /* If we don't find target_ops, quit. Only open targets should be
714 /* Unchain the target. */
716 (*cur) = (*cur)->beneath;
719 update_current_target ();
721 /* Finally close the target. Note we do this after unchaining, so
722 any target method calls from within the target_close
723 implementation don't end up in T anymore. */
729 /* Unpush TARGET and assert that it worked. */
732 unpush_target_and_assert (struct target_ops *target)
734 if (!unpush_target (target))
736 fprintf_unfiltered (gdb_stderr,
737 "pop_all_targets couldn't find target %s\n",
738 target->to_shortname);
739 internal_error (__FILE__, __LINE__,
740 _("failed internal consistency check"));
745 pop_all_targets_above (enum strata above_stratum)
747 while ((int) (current_target.to_stratum) > (int) above_stratum)
748 unpush_target_and_assert (target_stack);
754 pop_all_targets_at_and_above (enum strata stratum)
756 while ((int) (current_target.to_stratum) >= (int) stratum)
757 unpush_target_and_assert (target_stack);
761 pop_all_targets (void)
763 pop_all_targets_above (dummy_stratum);
766 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
769 target_is_pushed (struct target_ops *t)
771 struct target_ops *cur;
773 /* Check magic number. If wrong, it probably means someone changed
774 the struct definition, but not all the places that initialize one. */
775 if (t->to_magic != OPS_MAGIC)
777 fprintf_unfiltered (gdb_stderr,
778 "Magic number of %s target struct wrong\n",
780 internal_error (__FILE__, __LINE__,
781 _("failed internal consistency check"));
784 for (cur = target_stack; cur != NULL; cur = cur->beneath)
791 /* Default implementation of to_get_thread_local_address. */
794 generic_tls_error (void)
796 throw_error (TLS_GENERIC_ERROR,
797 _("Cannot find thread-local variables on this target"));
800 /* Using the objfile specified in OBJFILE, find the address for the
801 current thread's thread-local storage with offset OFFSET. */
803 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
805 volatile CORE_ADDR addr = 0;
806 struct target_ops *target = ¤t_target;
808 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
810 ptid_t ptid = inferior_ptid;
816 /* Fetch the load module address for this objfile. */
817 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
820 addr = target->to_get_thread_local_address (target, ptid,
823 /* If an error occurred, print TLS related messages here. Otherwise,
824 throw the error to some higher catcher. */
825 CATCH (ex, RETURN_MASK_ALL)
827 int objfile_is_library = (objfile->flags & OBJF_SHARED);
831 case TLS_NO_LIBRARY_SUPPORT_ERROR:
832 error (_("Cannot find thread-local variables "
833 "in this thread library."));
835 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
836 if (objfile_is_library)
837 error (_("Cannot find shared library `%s' in dynamic"
838 " linker's load module list"), objfile_name (objfile));
840 error (_("Cannot find executable file `%s' in dynamic"
841 " linker's load module list"), objfile_name (objfile));
843 case TLS_NOT_ALLOCATED_YET_ERROR:
844 if (objfile_is_library)
845 error (_("The inferior has not yet allocated storage for"
846 " thread-local variables in\n"
847 "the shared library `%s'\n"
849 objfile_name (objfile), target_pid_to_str (ptid));
851 error (_("The inferior has not yet allocated storage for"
852 " thread-local variables in\n"
853 "the executable `%s'\n"
855 objfile_name (objfile), target_pid_to_str (ptid));
857 case TLS_GENERIC_ERROR:
858 if (objfile_is_library)
859 error (_("Cannot find thread-local storage for %s, "
860 "shared library %s:\n%s"),
861 target_pid_to_str (ptid),
862 objfile_name (objfile), ex.message);
864 error (_("Cannot find thread-local storage for %s, "
865 "executable file %s:\n%s"),
866 target_pid_to_str (ptid),
867 objfile_name (objfile), ex.message);
870 throw_exception (ex);
876 /* It wouldn't be wrong here to try a gdbarch method, too; finding
877 TLS is an ABI-specific thing. But we don't do that yet. */
879 error (_("Cannot find thread-local variables on this target"));
885 target_xfer_status_to_string (enum target_xfer_status status)
887 #define CASE(X) case X: return #X
890 CASE(TARGET_XFER_E_IO);
891 CASE(TARGET_XFER_UNAVAILABLE);
900 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
902 /* target_read_string -- read a null terminated string, up to LEN bytes,
903 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
904 Set *STRING to a pointer to malloc'd memory containing the data; the caller
905 is responsible for freeing it. Return the number of bytes successfully
909 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
915 int buffer_allocated;
917 unsigned int nbytes_read = 0;
921 /* Small for testing. */
922 buffer_allocated = 4;
923 buffer = (char *) xmalloc (buffer_allocated);
928 tlen = MIN (len, 4 - (memaddr & 3));
929 offset = memaddr & 3;
931 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
934 /* The transfer request might have crossed the boundary to an
935 unallocated region of memory. Retry the transfer, requesting
939 errcode = target_read_memory (memaddr, buf, 1);
944 if (bufptr - buffer + tlen > buffer_allocated)
948 bytes = bufptr - buffer;
949 buffer_allocated *= 2;
950 buffer = (char *) xrealloc (buffer, buffer_allocated);
951 bufptr = buffer + bytes;
954 for (i = 0; i < tlen; i++)
956 *bufptr++ = buf[i + offset];
957 if (buf[i + offset] == '\000')
959 nbytes_read += i + 1;
975 struct target_section_table *
976 target_get_section_table (struct target_ops *target)
978 return (*target->to_get_section_table) (target);
981 /* Find a section containing ADDR. */
983 struct target_section *
984 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
986 struct target_section_table *table = target_get_section_table (target);
987 struct target_section *secp;
992 for (secp = table->sections; secp < table->sections_end; secp++)
994 if (addr >= secp->addr && addr < secp->endaddr)
1001 /* Helper for the memory xfer routines. Checks the attributes of the
1002 memory region of MEMADDR against the read or write being attempted.
1003 If the access is permitted returns true, otherwise returns false.
1004 REGION_P is an optional output parameter. If not-NULL, it is
1005 filled with a pointer to the memory region of MEMADDR. REG_LEN
1006 returns LEN trimmed to the end of the region. This is how much the
1007 caller can continue requesting, if the access is permitted. A
1008 single xfer request must not straddle memory region boundaries. */
1011 memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf,
1012 ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len,
1013 struct mem_region **region_p)
1015 struct mem_region *region;
1017 region = lookup_mem_region (memaddr);
1019 if (region_p != NULL)
1022 switch (region->attrib.mode)
1025 if (writebuf != NULL)
1030 if (readbuf != NULL)
1035 /* We only support writing to flash during "load" for now. */
1036 if (writebuf != NULL)
1037 error (_("Writing to flash memory forbidden in this context"));
1044 /* region->hi == 0 means there's no upper bound. */
1045 if (memaddr + len < region->hi || region->hi == 0)
1048 *reg_len = region->hi - memaddr;
1053 /* Read memory from more than one valid target. A core file, for
1054 instance, could have some of memory but delegate other bits to
1055 the target below it. So, we must manually try all targets. */
1057 enum target_xfer_status
1058 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
1059 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
1060 ULONGEST *xfered_len)
1062 enum target_xfer_status res;
1066 res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1067 readbuf, writebuf, memaddr, len,
1069 if (res == TARGET_XFER_OK)
1072 /* Stop if the target reports that the memory is not available. */
1073 if (res == TARGET_XFER_UNAVAILABLE)
1076 /* We want to continue past core files to executables, but not
1077 past a running target's memory. */
1078 if (ops->to_has_all_memory (ops))
1083 while (ops != NULL);
1085 /* The cache works at the raw memory level. Make sure the cache
1086 gets updated with raw contents no matter what kind of memory
1087 object was originally being written. Note we do write-through
1088 first, so that if it fails, we don't write to the cache contents
1089 that never made it to the target. */
1090 if (writebuf != NULL
1091 && !ptid_equal (inferior_ptid, null_ptid)
1092 && target_dcache_init_p ()
1093 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
1095 DCACHE *dcache = target_dcache_get ();
1097 /* Note that writing to an area of memory which wasn't present
1098 in the cache doesn't cause it to be loaded in. */
1099 dcache_update (dcache, res, memaddr, writebuf, *xfered_len);
1105 /* Perform a partial memory transfer.
1106 For docs see target.h, to_xfer_partial. */
1108 static enum target_xfer_status
1109 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1110 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1111 ULONGEST len, ULONGEST *xfered_len)
1113 enum target_xfer_status res;
1115 struct mem_region *region;
1116 struct inferior *inf;
1118 /* For accesses to unmapped overlay sections, read directly from
1119 files. Must do this first, as MEMADDR may need adjustment. */
1120 if (readbuf != NULL && overlay_debugging)
1122 struct obj_section *section = find_pc_overlay (memaddr);
1124 if (pc_in_unmapped_range (memaddr, section))
1126 struct target_section_table *table
1127 = target_get_section_table (ops);
1128 const char *section_name = section->the_bfd_section->name;
1130 memaddr = overlay_mapped_address (memaddr, section);
1131 return section_table_xfer_memory_partial (readbuf, writebuf,
1132 memaddr, len, xfered_len,
1134 table->sections_end,
1139 /* Try the executable files, if "trust-readonly-sections" is set. */
1140 if (readbuf != NULL && trust_readonly)
1142 struct target_section *secp;
1143 struct target_section_table *table;
1145 secp = target_section_by_addr (ops, memaddr);
1147 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1148 secp->the_bfd_section)
1151 table = target_get_section_table (ops);
1152 return section_table_xfer_memory_partial (readbuf, writebuf,
1153 memaddr, len, xfered_len,
1155 table->sections_end,
1160 /* Try GDB's internal data cache. */
1162 if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len,
1164 return TARGET_XFER_E_IO;
1166 if (!ptid_equal (inferior_ptid, null_ptid))
1167 inf = find_inferior_ptid (inferior_ptid);
1173 /* The dcache reads whole cache lines; that doesn't play well
1174 with reading from a trace buffer, because reading outside of
1175 the collected memory range fails. */
1176 && get_traceframe_number () == -1
1177 && (region->attrib.cache
1178 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1179 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1181 DCACHE *dcache = target_dcache_get_or_init ();
1183 return dcache_read_memory_partial (ops, dcache, memaddr, readbuf,
1184 reg_len, xfered_len);
1187 /* If none of those methods found the memory we wanted, fall back
1188 to a target partial transfer. Normally a single call to
1189 to_xfer_partial is enough; if it doesn't recognize an object
1190 it will call the to_xfer_partial of the next target down.
1191 But for memory this won't do. Memory is the only target
1192 object which can be read from more than one valid target.
1193 A core file, for instance, could have some of memory but
1194 delegate other bits to the target below it. So, we must
1195 manually try all targets. */
1197 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1200 /* If we still haven't got anything, return the last error. We
1205 /* Perform a partial memory transfer. For docs see target.h,
1208 static enum target_xfer_status
1209 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1210 gdb_byte *readbuf, const gdb_byte *writebuf,
1211 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1213 enum target_xfer_status res;
1215 /* Zero length requests are ok and require no work. */
1217 return TARGET_XFER_EOF;
1219 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1220 breakpoint insns, thus hiding out from higher layers whether
1221 there are software breakpoints inserted in the code stream. */
1222 if (readbuf != NULL)
1224 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1227 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1228 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len);
1232 /* A large write request is likely to be partially satisfied
1233 by memory_xfer_partial_1. We will continually malloc
1234 and free a copy of the entire write request for breakpoint
1235 shadow handling even though we only end up writing a small
1236 subset of it. Cap writes to a limit specified by the target
1237 to mitigate this. */
1238 len = std::min (ops->to_get_memory_xfer_limit (ops), len);
1240 gdb::byte_vector buf (writebuf, writebuf + len);
1241 breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len);
1242 res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len,
1249 scoped_restore_tmpl<int>
1250 make_scoped_restore_show_memory_breakpoints (int show)
1252 return make_scoped_restore (&show_memory_breakpoints, show);
1255 /* For docs see target.h, to_xfer_partial. */
1257 enum target_xfer_status
1258 target_xfer_partial (struct target_ops *ops,
1259 enum target_object object, const char *annex,
1260 gdb_byte *readbuf, const gdb_byte *writebuf,
1261 ULONGEST offset, ULONGEST len,
1262 ULONGEST *xfered_len)
1264 enum target_xfer_status retval;
1266 gdb_assert (ops->to_xfer_partial != NULL);
1268 /* Transfer is done when LEN is zero. */
1270 return TARGET_XFER_EOF;
1272 if (writebuf && !may_write_memory)
1273 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1274 core_addr_to_string_nz (offset), plongest (len));
1278 /* If this is a memory transfer, let the memory-specific code
1279 have a look at it instead. Memory transfers are more
1281 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1282 || object == TARGET_OBJECT_CODE_MEMORY)
1283 retval = memory_xfer_partial (ops, object, readbuf,
1284 writebuf, offset, len, xfered_len);
1285 else if (object == TARGET_OBJECT_RAW_MEMORY)
1287 /* Skip/avoid accessing the target if the memory region
1288 attributes block the access. Check this here instead of in
1289 raw_memory_xfer_partial as otherwise we'd end up checking
1290 this twice in the case of the memory_xfer_partial path is
1291 taken; once before checking the dcache, and another in the
1292 tail call to raw_memory_xfer_partial. */
1293 if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len,
1295 return TARGET_XFER_E_IO;
1297 /* Request the normal memory object from other layers. */
1298 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1302 retval = ops->to_xfer_partial (ops, object, annex, readbuf,
1303 writebuf, offset, len, xfered_len);
1307 const unsigned char *myaddr = NULL;
1309 fprintf_unfiltered (gdb_stdlog,
1310 "%s:target_xfer_partial "
1311 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1314 (annex ? annex : "(null)"),
1315 host_address_to_string (readbuf),
1316 host_address_to_string (writebuf),
1317 core_addr_to_string_nz (offset),
1318 pulongest (len), retval,
1319 pulongest (*xfered_len));
1325 if (retval == TARGET_XFER_OK && myaddr != NULL)
1329 fputs_unfiltered (", bytes =", gdb_stdlog);
1330 for (i = 0; i < *xfered_len; i++)
1332 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1334 if (targetdebug < 2 && i > 0)
1336 fprintf_unfiltered (gdb_stdlog, " ...");
1339 fprintf_unfiltered (gdb_stdlog, "\n");
1342 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1346 fputc_unfiltered ('\n', gdb_stdlog);
1349 /* Check implementations of to_xfer_partial update *XFERED_LEN
1350 properly. Do assertion after printing debug messages, so that we
1351 can find more clues on assertion failure from debugging messages. */
1352 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE)
1353 gdb_assert (*xfered_len > 0);
1358 /* Read LEN bytes of target memory at address MEMADDR, placing the
1359 results in GDB's memory at MYADDR. Returns either 0 for success or
1360 -1 if any error occurs.
1362 If an error occurs, no guarantee is made about the contents of the data at
1363 MYADDR. In particular, the caller should not depend upon partial reads
1364 filling the buffer with good data. There is no way for the caller to know
1365 how much good data might have been transfered anyway. Callers that can
1366 deal with partial reads should call target_read (which will retry until
1367 it makes no progress, and then return how much was transferred). */
1370 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1372 /* Dispatch to the topmost target, not the flattened current_target.
1373 Memory accesses check target->to_has_(all_)memory, and the
1374 flattened target doesn't inherit those. */
1375 if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1376 myaddr, memaddr, len) == len)
1382 /* See target/target.h. */
1385 target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
1390 r = target_read_memory (memaddr, buf, sizeof buf);
1393 *result = extract_unsigned_integer (buf, sizeof buf,
1394 gdbarch_byte_order (target_gdbarch ()));
1398 /* Like target_read_memory, but specify explicitly that this is a read
1399 from the target's raw memory. That is, this read bypasses the
1400 dcache, breakpoint shadowing, etc. */
1403 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1405 /* See comment in target_read_memory about why the request starts at
1406 current_target.beneath. */
1407 if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1408 myaddr, memaddr, len) == len)
1414 /* Like target_read_memory, but specify explicitly that this is a read from
1415 the target's stack. This may trigger different cache behavior. */
1418 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1420 /* See comment in target_read_memory about why the request starts at
1421 current_target.beneath. */
1422 if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL,
1423 myaddr, memaddr, len) == len)
1429 /* Like target_read_memory, but specify explicitly that this is a read from
1430 the target's code. This may trigger different cache behavior. */
1433 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1435 /* See comment in target_read_memory about why the request starts at
1436 current_target.beneath. */
1437 if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL,
1438 myaddr, memaddr, len) == len)
1444 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1445 Returns either 0 for success or -1 if any error occurs. If an
1446 error occurs, no guarantee is made about how much data got written.
1447 Callers that can deal with partial writes should call
1451 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1453 /* See comment in target_read_memory about why the request starts at
1454 current_target.beneath. */
1455 if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL,
1456 myaddr, memaddr, len) == len)
1462 /* Write LEN bytes from MYADDR to target raw memory at address
1463 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1464 If an error occurs, no guarantee is made about how much data got
1465 written. Callers that can deal with partial writes should call
1469 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1471 /* See comment in target_read_memory about why the request starts at
1472 current_target.beneath. */
1473 if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL,
1474 myaddr, memaddr, len) == len)
1480 /* Fetch the target's memory map. */
1482 std::vector<mem_region>
1483 target_memory_map (void)
1485 std::vector<mem_region> result
1486 = current_target.to_memory_map (¤t_target);
1487 if (result.empty ())
1490 std::sort (result.begin (), result.end ());
1492 /* Check that regions do not overlap. Simultaneously assign
1493 a numbering for the "mem" commands to use to refer to
1495 mem_region *last_one = NULL;
1496 for (size_t ix = 0; ix < result.size (); ix++)
1498 mem_region *this_one = &result[ix];
1499 this_one->number = ix;
1501 if (last_one != NULL && last_one->hi > this_one->lo)
1503 warning (_("Overlapping regions in memory map: ignoring"));
1504 return std::vector<mem_region> ();
1507 last_one = this_one;
1514 target_flash_erase (ULONGEST address, LONGEST length)
1516 current_target.to_flash_erase (¤t_target, address, length);
1520 target_flash_done (void)
1522 current_target.to_flash_done (¤t_target);
1526 show_trust_readonly (struct ui_file *file, int from_tty,
1527 struct cmd_list_element *c, const char *value)
1529 fprintf_filtered (file,
1530 _("Mode for reading from readonly sections is %s.\n"),
1534 /* Target vector read/write partial wrapper functions. */
1536 static enum target_xfer_status
1537 target_read_partial (struct target_ops *ops,
1538 enum target_object object,
1539 const char *annex, gdb_byte *buf,
1540 ULONGEST offset, ULONGEST len,
1541 ULONGEST *xfered_len)
1543 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1547 static enum target_xfer_status
1548 target_write_partial (struct target_ops *ops,
1549 enum target_object object,
1550 const char *annex, const gdb_byte *buf,
1551 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1553 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1557 /* Wrappers to perform the full transfer. */
1559 /* For docs on target_read see target.h. */
1562 target_read (struct target_ops *ops,
1563 enum target_object object,
1564 const char *annex, gdb_byte *buf,
1565 ULONGEST offset, LONGEST len)
1567 LONGEST xfered_total = 0;
1570 /* If we are reading from a memory object, find the length of an addressable
1571 unit for that architecture. */
1572 if (object == TARGET_OBJECT_MEMORY
1573 || object == TARGET_OBJECT_STACK_MEMORY
1574 || object == TARGET_OBJECT_CODE_MEMORY
1575 || object == TARGET_OBJECT_RAW_MEMORY)
1576 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1578 while (xfered_total < len)
1580 ULONGEST xfered_partial;
1581 enum target_xfer_status status;
1583 status = target_read_partial (ops, object, annex,
1584 buf + xfered_total * unit_size,
1585 offset + xfered_total, len - xfered_total,
1588 /* Call an observer, notifying them of the xfer progress? */
1589 if (status == TARGET_XFER_EOF)
1590 return xfered_total;
1591 else if (status == TARGET_XFER_OK)
1593 xfered_total += xfered_partial;
1597 return TARGET_XFER_E_IO;
1603 /* Assuming that the entire [begin, end) range of memory cannot be
1604 read, try to read whatever subrange is possible to read.
1606 The function returns, in RESULT, either zero or one memory block.
1607 If there's a readable subrange at the beginning, it is completely
1608 read and returned. Any further readable subrange will not be read.
1609 Otherwise, if there's a readable subrange at the end, it will be
1610 completely read and returned. Any readable subranges before it
1611 (obviously, not starting at the beginning), will be ignored. In
1612 other cases -- either no readable subrange, or readable subrange(s)
1613 that is neither at the beginning, or end, nothing is returned.
1615 The purpose of this function is to handle a read across a boundary
1616 of accessible memory in a case when memory map is not available.
1617 The above restrictions are fine for this case, but will give
1618 incorrect results if the memory is 'patchy'. However, supporting
1619 'patchy' memory would require trying to read every single byte,
1620 and it seems unacceptable solution. Explicit memory map is
1621 recommended for this case -- and target_read_memory_robust will
1622 take care of reading multiple ranges then. */
1625 read_whatever_is_readable (struct target_ops *ops,
1626 const ULONGEST begin, const ULONGEST end,
1628 std::vector<memory_read_result> *result)
1630 ULONGEST current_begin = begin;
1631 ULONGEST current_end = end;
1633 ULONGEST xfered_len;
1635 /* If we previously failed to read 1 byte, nothing can be done here. */
1636 if (end - begin <= 1)
1639 gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin));
1641 /* Check that either first or the last byte is readable, and give up
1642 if not. This heuristic is meant to permit reading accessible memory
1643 at the boundary of accessible region. */
1644 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1645 buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK)
1650 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1651 buf.get () + (end - begin) - 1, end - 1, 1,
1652 &xfered_len) == TARGET_XFER_OK)
1660 /* Loop invariant is that the [current_begin, current_end) was previously
1661 found to be not readable as a whole.
1663 Note loop condition -- if the range has 1 byte, we can't divide the range
1664 so there's no point trying further. */
1665 while (current_end - current_begin > 1)
1667 ULONGEST first_half_begin, first_half_end;
1668 ULONGEST second_half_begin, second_half_end;
1670 ULONGEST middle = current_begin + (current_end - current_begin) / 2;
1674 first_half_begin = current_begin;
1675 first_half_end = middle;
1676 second_half_begin = middle;
1677 second_half_end = current_end;
1681 first_half_begin = middle;
1682 first_half_end = current_end;
1683 second_half_begin = current_begin;
1684 second_half_end = middle;
1687 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1688 buf.get () + (first_half_begin - begin) * unit_size,
1690 first_half_end - first_half_begin);
1692 if (xfer == first_half_end - first_half_begin)
1694 /* This half reads up fine. So, the error must be in the
1696 current_begin = second_half_begin;
1697 current_end = second_half_end;
1701 /* This half is not readable. Because we've tried one byte, we
1702 know some part of this half if actually readable. Go to the next
1703 iteration to divide again and try to read.
1705 We don't handle the other half, because this function only tries
1706 to read a single readable subrange. */
1707 current_begin = first_half_begin;
1708 current_end = first_half_end;
1714 /* The [begin, current_begin) range has been read. */
1715 result->emplace_back (begin, current_end, std::move (buf));
1719 /* The [current_end, end) range has been read. */
1720 LONGEST region_len = end - current_end;
1722 gdb::unique_xmalloc_ptr<gdb_byte> data
1723 ((gdb_byte *) xmalloc (region_len * unit_size));
1724 memcpy (data.get (), buf.get () + (current_end - begin) * unit_size,
1725 region_len * unit_size);
1726 result->emplace_back (current_end, end, std::move (data));
1730 std::vector<memory_read_result>
1731 read_memory_robust (struct target_ops *ops,
1732 const ULONGEST offset, const LONGEST len)
1734 std::vector<memory_read_result> result;
1735 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1737 LONGEST xfered_total = 0;
1738 while (xfered_total < len)
1740 struct mem_region *region = lookup_mem_region (offset + xfered_total);
1743 /* If there is no explicit region, a fake one should be created. */
1744 gdb_assert (region);
1746 if (region->hi == 0)
1747 region_len = len - xfered_total;
1749 region_len = region->hi - offset;
1751 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1753 /* Cannot read this region. Note that we can end up here only
1754 if the region is explicitly marked inaccessible, or
1755 'inaccessible-by-default' is in effect. */
1756 xfered_total += region_len;
1760 LONGEST to_read = std::min (len - xfered_total, region_len);
1761 gdb::unique_xmalloc_ptr<gdb_byte> buffer
1762 ((gdb_byte *) xmalloc (to_read * unit_size));
1764 LONGEST xfered_partial =
1765 target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (),
1766 offset + xfered_total, to_read);
1767 /* Call an observer, notifying them of the xfer progress? */
1768 if (xfered_partial <= 0)
1770 /* Got an error reading full chunk. See if maybe we can read
1772 read_whatever_is_readable (ops, offset + xfered_total,
1773 offset + xfered_total + to_read,
1774 unit_size, &result);
1775 xfered_total += to_read;
1779 result.emplace_back (offset + xfered_total,
1780 offset + xfered_total + xfered_partial,
1781 std::move (buffer));
1782 xfered_total += xfered_partial;
1792 /* An alternative to target_write with progress callbacks. */
1795 target_write_with_progress (struct target_ops *ops,
1796 enum target_object object,
1797 const char *annex, const gdb_byte *buf,
1798 ULONGEST offset, LONGEST len,
1799 void (*progress) (ULONGEST, void *), void *baton)
1801 LONGEST xfered_total = 0;
1804 /* If we are writing to a memory object, find the length of an addressable
1805 unit for that architecture. */
1806 if (object == TARGET_OBJECT_MEMORY
1807 || object == TARGET_OBJECT_STACK_MEMORY
1808 || object == TARGET_OBJECT_CODE_MEMORY
1809 || object == TARGET_OBJECT_RAW_MEMORY)
1810 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1812 /* Give the progress callback a chance to set up. */
1814 (*progress) (0, baton);
1816 while (xfered_total < len)
1818 ULONGEST xfered_partial;
1819 enum target_xfer_status status;
1821 status = target_write_partial (ops, object, annex,
1822 buf + xfered_total * unit_size,
1823 offset + xfered_total, len - xfered_total,
1826 if (status != TARGET_XFER_OK)
1827 return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO;
1830 (*progress) (xfered_partial, baton);
1832 xfered_total += xfered_partial;
1838 /* For docs on target_write see target.h. */
1841 target_write (struct target_ops *ops,
1842 enum target_object object,
1843 const char *annex, const gdb_byte *buf,
1844 ULONGEST offset, LONGEST len)
1846 return target_write_with_progress (ops, object, annex, buf, offset, len,
1850 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1851 the size of the transferred data. PADDING additional bytes are
1852 available in *BUF_P. This is a helper function for
1853 target_read_alloc; see the declaration of that function for more
1857 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1858 const char *annex, gdb_byte **buf_p, int padding)
1860 size_t buf_alloc, buf_pos;
1863 /* This function does not have a length parameter; it reads the
1864 entire OBJECT). Also, it doesn't support objects fetched partly
1865 from one target and partly from another (in a different stratum,
1866 e.g. a core file and an executable). Both reasons make it
1867 unsuitable for reading memory. */
1868 gdb_assert (object != TARGET_OBJECT_MEMORY);
1870 /* Start by reading up to 4K at a time. The target will throttle
1871 this number down if necessary. */
1873 buf = (gdb_byte *) xmalloc (buf_alloc);
1877 ULONGEST xfered_len;
1878 enum target_xfer_status status;
1880 status = target_read_partial (ops, object, annex, &buf[buf_pos],
1881 buf_pos, buf_alloc - buf_pos - padding,
1884 if (status == TARGET_XFER_EOF)
1886 /* Read all there was. */
1893 else if (status != TARGET_XFER_OK)
1895 /* An error occurred. */
1897 return TARGET_XFER_E_IO;
1900 buf_pos += xfered_len;
1902 /* If the buffer is filling up, expand it. */
1903 if (buf_alloc < buf_pos * 2)
1906 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
1913 /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return
1914 the size of the transferred data. See the declaration in "target.h"
1915 function for more information about the return value. */
1918 target_read_alloc (struct target_ops *ops, enum target_object object,
1919 const char *annex, gdb_byte **buf_p)
1921 return target_read_alloc_1 (ops, object, annex, buf_p, 0);
1926 gdb::unique_xmalloc_ptr<char>
1927 target_read_stralloc (struct target_ops *ops, enum target_object object,
1932 LONGEST i, transferred;
1934 transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1);
1935 bufstr = (char *) buffer;
1937 if (transferred < 0)
1940 if (transferred == 0)
1941 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
1943 bufstr[transferred] = 0;
1945 /* Check for embedded NUL bytes; but allow trailing NULs. */
1946 for (i = strlen (bufstr); i < transferred; i++)
1949 warning (_("target object %d, annex %s, "
1950 "contained unexpected null characters"),
1951 (int) object, annex ? annex : "(none)");
1955 return gdb::unique_xmalloc_ptr<char> (bufstr);
1958 /* Memory transfer methods. */
1961 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1964 /* This method is used to read from an alternate, non-current
1965 target. This read must bypass the overlay support (as symbols
1966 don't match this target), and GDB's internal cache (wrong cache
1967 for this target). */
1968 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
1970 memory_error (TARGET_XFER_E_IO, addr);
1974 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
1975 int len, enum bfd_endian byte_order)
1977 gdb_byte buf[sizeof (ULONGEST)];
1979 gdb_assert (len <= sizeof (buf));
1980 get_target_memory (ops, addr, buf, len);
1981 return extract_unsigned_integer (buf, len, byte_order);
1987 target_insert_breakpoint (struct gdbarch *gdbarch,
1988 struct bp_target_info *bp_tgt)
1990 if (!may_insert_breakpoints)
1992 warning (_("May not insert breakpoints"));
1996 return current_target.to_insert_breakpoint (¤t_target,
2003 target_remove_breakpoint (struct gdbarch *gdbarch,
2004 struct bp_target_info *bp_tgt,
2005 enum remove_bp_reason reason)
2007 /* This is kind of a weird case to handle, but the permission might
2008 have been changed after breakpoints were inserted - in which case
2009 we should just take the user literally and assume that any
2010 breakpoints should be left in place. */
2011 if (!may_insert_breakpoints)
2013 warning (_("May not remove breakpoints"));
2017 return current_target.to_remove_breakpoint (¤t_target,
2018 gdbarch, bp_tgt, reason);
2022 info_target_command (char *args, int from_tty)
2024 struct target_ops *t;
2025 int has_all_mem = 0;
2027 if (symfile_objfile != NULL)
2028 printf_unfiltered (_("Symbols from \"%s\".\n"),
2029 objfile_name (symfile_objfile));
2031 for (t = target_stack; t != NULL; t = t->beneath)
2033 if (!(*t->to_has_memory) (t))
2036 if ((int) (t->to_stratum) <= (int) dummy_stratum)
2039 printf_unfiltered (_("\tWhile running this, "
2040 "GDB does not access memory from...\n"));
2041 printf_unfiltered ("%s:\n", t->to_longname);
2042 (t->to_files_info) (t);
2043 has_all_mem = (*t->to_has_all_memory) (t);
2047 /* This function is called before any new inferior is created, e.g.
2048 by running a program, attaching, or connecting to a target.
2049 It cleans up any state from previous invocations which might
2050 change between runs. This is a subset of what target_preopen
2051 resets (things which might change between targets). */
2054 target_pre_inferior (int from_tty)
2056 /* Clear out solib state. Otherwise the solib state of the previous
2057 inferior might have survived and is entirely wrong for the new
2058 target. This has been observed on GNU/Linux using glibc 2.3. How
2070 Cannot access memory at address 0xdeadbeef
2073 /* In some OSs, the shared library list is the same/global/shared
2074 across inferiors. If code is shared between processes, so are
2075 memory regions and features. */
2076 if (!gdbarch_has_global_solist (target_gdbarch ()))
2078 no_shared_libraries (NULL, from_tty);
2080 invalidate_target_mem_regions ();
2082 target_clear_description ();
2085 /* attach_flag may be set if the previous process associated with
2086 the inferior was attached to. */
2087 current_inferior ()->attach_flag = 0;
2089 current_inferior ()->highest_thread_num = 0;
2091 agent_capability_invalidate ();
2094 /* Callback for iterate_over_inferiors. Gets rid of the given
2098 dispose_inferior (struct inferior *inf, void *args)
2100 struct thread_info *thread;
2102 thread = any_thread_of_process (inf->pid);
2105 switch_to_thread (thread->ptid);
2107 /* Core inferiors actually should be detached, not killed. */
2108 if (target_has_execution)
2111 target_detach (NULL, 0);
2117 /* This is to be called by the open routine before it does
2121 target_preopen (int from_tty)
2125 if (have_inferiors ())
2128 || !have_live_inferiors ()
2129 || query (_("A program is being debugged already. Kill it? ")))
2130 iterate_over_inferiors (dispose_inferior, NULL);
2132 error (_("Program not killed."));
2135 /* Calling target_kill may remove the target from the stack. But if
2136 it doesn't (which seems like a win for UDI), remove it now. */
2137 /* Leave the exec target, though. The user may be switching from a
2138 live process to a core of the same program. */
2139 pop_all_targets_above (file_stratum);
2141 target_pre_inferior (from_tty);
2144 /* Detach a target after doing deferred register stores. */
2147 target_detach (const char *args, int from_tty)
2149 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2150 /* Don't remove global breakpoints here. They're removed on
2151 disconnection from the target. */
2154 /* If we're in breakpoints-always-inserted mode, have to remove
2155 them before detaching. */
2156 remove_breakpoints_pid (ptid_get_pid (inferior_ptid));
2158 prepare_for_detach ();
2160 current_target.to_detach (¤t_target, args, from_tty);
2164 target_disconnect (const char *args, int from_tty)
2166 /* If we're in breakpoints-always-inserted mode or if breakpoints
2167 are global across processes, we have to remove them before
2169 remove_breakpoints ();
2171 current_target.to_disconnect (¤t_target, args, from_tty);
2174 /* See target/target.h. */
2177 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2179 return (current_target.to_wait) (¤t_target, ptid, status, options);
2185 default_target_wait (struct target_ops *ops,
2186 ptid_t ptid, struct target_waitstatus *status,
2189 status->kind = TARGET_WAITKIND_IGNORE;
2190 return minus_one_ptid;
2194 target_pid_to_str (ptid_t ptid)
2196 return (*current_target.to_pid_to_str) (¤t_target, ptid);
2200 target_thread_name (struct thread_info *info)
2202 return current_target.to_thread_name (¤t_target, info);
2205 struct thread_info *
2206 target_thread_handle_to_thread_info (const gdb_byte *thread_handle,
2208 struct inferior *inf)
2210 return current_target.to_thread_handle_to_thread_info
2211 (¤t_target, thread_handle, handle_len, inf);
2215 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2217 target_dcache_invalidate ();
2219 current_target.to_resume (¤t_target, ptid, step, signal);
2221 registers_changed_ptid (ptid);
2222 /* We only set the internal executing state here. The user/frontend
2223 running state is set at a higher level. */
2224 set_executing (ptid, 1);
2225 clear_inline_frame_state (ptid);
2228 /* If true, target_commit_resume is a nop. */
2229 static int defer_target_commit_resume;
2234 target_commit_resume (void)
2236 struct target_ops *t;
2238 if (defer_target_commit_resume)
2241 current_target.to_commit_resume (¤t_target);
2246 scoped_restore_tmpl<int>
2247 make_scoped_defer_target_commit_resume ()
2249 return make_scoped_restore (&defer_target_commit_resume, 1);
2253 target_pass_signals (int numsigs, unsigned char *pass_signals)
2255 (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals);
2259 target_program_signals (int numsigs, unsigned char *program_signals)
2261 (*current_target.to_program_signals) (¤t_target,
2262 numsigs, program_signals);
2266 default_follow_fork (struct target_ops *self, int follow_child,
2269 /* Some target returned a fork event, but did not know how to follow it. */
2270 internal_error (__FILE__, __LINE__,
2271 _("could not find a target to follow fork"));
2274 /* Look through the list of possible targets for a target that can
2278 target_follow_fork (int follow_child, int detach_fork)
2280 return current_target.to_follow_fork (¤t_target,
2281 follow_child, detach_fork);
2284 /* Target wrapper for follow exec hook. */
2287 target_follow_exec (struct inferior *inf, char *execd_pathname)
2289 current_target.to_follow_exec (¤t_target, inf, execd_pathname);
2293 default_mourn_inferior (struct target_ops *self)
2295 internal_error (__FILE__, __LINE__,
2296 _("could not find a target to follow mourn inferior"));
2300 target_mourn_inferior (ptid_t ptid)
2302 gdb_assert (ptid_equal (ptid, inferior_ptid));
2303 current_target.to_mourn_inferior (¤t_target);
2305 /* We no longer need to keep handles on any of the object files.
2306 Make sure to release them to avoid unnecessarily locking any
2307 of them while we're not actually debugging. */
2308 bfd_cache_close_all ();
2311 /* Look for a target which can describe architectural features, starting
2312 from TARGET. If we find one, return its description. */
2314 const struct target_desc *
2315 target_read_description (struct target_ops *target)
2317 return target->to_read_description (target);
2320 /* This implements a basic search of memory, reading target memory and
2321 performing the search here (as opposed to performing the search in on the
2322 target side with, for example, gdbserver). */
2325 simple_search_memory (struct target_ops *ops,
2326 CORE_ADDR start_addr, ULONGEST search_space_len,
2327 const gdb_byte *pattern, ULONGEST pattern_len,
2328 CORE_ADDR *found_addrp)
2330 /* NOTE: also defined in find.c testcase. */
2331 #define SEARCH_CHUNK_SIZE 16000
2332 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2333 /* Buffer to hold memory contents for searching. */
2334 unsigned search_buf_size;
2336 search_buf_size = chunk_size + pattern_len - 1;
2338 /* No point in trying to allocate a buffer larger than the search space. */
2339 if (search_space_len < search_buf_size)
2340 search_buf_size = search_space_len;
2342 gdb::byte_vector search_buf (search_buf_size);
2344 /* Prime the search buffer. */
2346 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2347 search_buf.data (), start_addr, search_buf_size)
2350 warning (_("Unable to access %s bytes of target "
2351 "memory at %s, halting search."),
2352 pulongest (search_buf_size), hex_string (start_addr));
2356 /* Perform the search.
2358 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2359 When we've scanned N bytes we copy the trailing bytes to the start and
2360 read in another N bytes. */
2362 while (search_space_len >= pattern_len)
2364 gdb_byte *found_ptr;
2365 unsigned nr_search_bytes
2366 = std::min (search_space_len, (ULONGEST) search_buf_size);
2368 found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes,
2369 pattern, pattern_len);
2371 if (found_ptr != NULL)
2373 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ());
2375 *found_addrp = found_addr;
2379 /* Not found in this chunk, skip to next chunk. */
2381 /* Don't let search_space_len wrap here, it's unsigned. */
2382 if (search_space_len >= chunk_size)
2383 search_space_len -= chunk_size;
2385 search_space_len = 0;
2387 if (search_space_len >= pattern_len)
2389 unsigned keep_len = search_buf_size - chunk_size;
2390 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2393 /* Copy the trailing part of the previous iteration to the front
2394 of the buffer for the next iteration. */
2395 gdb_assert (keep_len == pattern_len - 1);
2396 memcpy (&search_buf[0], &search_buf[chunk_size], keep_len);
2398 nr_to_read = std::min (search_space_len - keep_len,
2399 (ULONGEST) chunk_size);
2401 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2402 &search_buf[keep_len], read_addr,
2403 nr_to_read) != nr_to_read)
2405 warning (_("Unable to access %s bytes of target "
2406 "memory at %s, halting search."),
2407 plongest (nr_to_read),
2408 hex_string (read_addr));
2412 start_addr += chunk_size;
2421 /* Default implementation of memory-searching. */
2424 default_search_memory (struct target_ops *self,
2425 CORE_ADDR start_addr, ULONGEST search_space_len,
2426 const gdb_byte *pattern, ULONGEST pattern_len,
2427 CORE_ADDR *found_addrp)
2429 /* Start over from the top of the target stack. */
2430 return simple_search_memory (current_target.beneath,
2431 start_addr, search_space_len,
2432 pattern, pattern_len, found_addrp);
2435 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2436 sequence of bytes in PATTERN with length PATTERN_LEN.
2438 The result is 1 if found, 0 if not found, and -1 if there was an error
2439 requiring halting of the search (e.g. memory read error).
2440 If the pattern is found the address is recorded in FOUND_ADDRP. */
2443 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2444 const gdb_byte *pattern, ULONGEST pattern_len,
2445 CORE_ADDR *found_addrp)
2447 return current_target.to_search_memory (¤t_target, start_addr,
2449 pattern, pattern_len, found_addrp);
2452 /* Look through the currently pushed targets. If none of them will
2453 be able to restart the currently running process, issue an error
2457 target_require_runnable (void)
2459 struct target_ops *t;
2461 for (t = target_stack; t != NULL; t = t->beneath)
2463 /* If this target knows how to create a new program, then
2464 assume we will still be able to after killing the current
2465 one. Either killing and mourning will not pop T, or else
2466 find_default_run_target will find it again. */
2467 if (t->to_create_inferior != NULL)
2470 /* Do not worry about targets at certain strata that can not
2471 create inferiors. Assume they will be pushed again if
2472 necessary, and continue to the process_stratum. */
2473 if (t->to_stratum == thread_stratum
2474 || t->to_stratum == record_stratum
2475 || t->to_stratum == arch_stratum)
2478 error (_("The \"%s\" target does not support \"run\". "
2479 "Try \"help target\" or \"continue\"."),
2483 /* This function is only called if the target is running. In that
2484 case there should have been a process_stratum target and it
2485 should either know how to create inferiors, or not... */
2486 internal_error (__FILE__, __LINE__, _("No targets found"));
2489 /* Whether GDB is allowed to fall back to the default run target for
2490 "run", "attach", etc. when no target is connected yet. */
2491 static int auto_connect_native_target = 1;
2494 show_auto_connect_native_target (struct ui_file *file, int from_tty,
2495 struct cmd_list_element *c, const char *value)
2497 fprintf_filtered (file,
2498 _("Whether GDB may automatically connect to the "
2499 "native target is %s.\n"),
2503 /* Look through the list of possible targets for a target that can
2504 execute a run or attach command without any other data. This is
2505 used to locate the default process stratum.
2507 If DO_MESG is not NULL, the result is always valid (error() is
2508 called for errors); else, return NULL on error. */
2510 static struct target_ops *
2511 find_default_run_target (const char *do_mesg)
2513 struct target_ops *runable = NULL;
2515 if (auto_connect_native_target)
2517 struct target_ops *t;
2521 for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i)
2523 if (t->to_can_run != delegate_can_run && target_can_run (t))
2534 if (runable == NULL)
2537 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2548 find_attach_target (void)
2550 struct target_ops *t;
2552 /* If a target on the current stack can attach, use it. */
2553 for (t = current_target.beneath; t != NULL; t = t->beneath)
2555 if (t->to_attach != NULL)
2559 /* Otherwise, use the default run target for attaching. */
2561 t = find_default_run_target ("attach");
2569 find_run_target (void)
2571 struct target_ops *t;
2573 /* If a target on the current stack can attach, use it. */
2574 for (t = current_target.beneath; t != NULL; t = t->beneath)
2576 if (t->to_create_inferior != NULL)
2580 /* Otherwise, use the default run target. */
2582 t = find_default_run_target ("run");
2587 /* Implement the "info proc" command. */
2590 target_info_proc (const char *args, enum info_proc_what what)
2592 struct target_ops *t;
2594 /* If we're already connected to something that can get us OS
2595 related data, use it. Otherwise, try using the native
2597 if (current_target.to_stratum >= process_stratum)
2598 t = current_target.beneath;
2600 t = find_default_run_target (NULL);
2602 for (; t != NULL; t = t->beneath)
2604 if (t->to_info_proc != NULL)
2606 t->to_info_proc (t, args, what);
2609 fprintf_unfiltered (gdb_stdlog,
2610 "target_info_proc (\"%s\", %d)\n", args, what);
2620 find_default_supports_disable_randomization (struct target_ops *self)
2622 struct target_ops *t;
2624 t = find_default_run_target (NULL);
2625 if (t && t->to_supports_disable_randomization)
2626 return (t->to_supports_disable_randomization) (t);
2631 target_supports_disable_randomization (void)
2633 struct target_ops *t;
2635 for (t = ¤t_target; t != NULL; t = t->beneath)
2636 if (t->to_supports_disable_randomization)
2637 return t->to_supports_disable_randomization (t);
2642 /* See target/target.h. */
2645 target_supports_multi_process (void)
2647 return (*current_target.to_supports_multi_process) (¤t_target);
2652 gdb::unique_xmalloc_ptr<char>
2653 target_get_osdata (const char *type)
2655 struct target_ops *t;
2657 /* If we're already connected to something that can get us OS
2658 related data, use it. Otherwise, try using the native
2660 if (current_target.to_stratum >= process_stratum)
2661 t = current_target.beneath;
2663 t = find_default_run_target ("get OS data");
2668 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2671 static struct address_space *
2672 default_thread_address_space (struct target_ops *self, ptid_t ptid)
2674 struct inferior *inf;
2676 /* Fall-back to the "main" address space of the inferior. */
2677 inf = find_inferior_ptid (ptid);
2679 if (inf == NULL || inf->aspace == NULL)
2680 internal_error (__FILE__, __LINE__,
2681 _("Can't determine the current "
2682 "address space of thread %s\n"),
2683 target_pid_to_str (ptid));
2688 /* Determine the current address space of thread PTID. */
2690 struct address_space *
2691 target_thread_address_space (ptid_t ptid)
2693 struct address_space *aspace;
2695 aspace = current_target.to_thread_address_space (¤t_target, ptid);
2696 gdb_assert (aspace != NULL);
2702 /* Target file operations. */
2704 static struct target_ops *
2705 default_fileio_target (void)
2707 /* If we're already connected to something that can perform
2708 file I/O, use it. Otherwise, try using the native target. */
2709 if (current_target.to_stratum >= process_stratum)
2710 return current_target.beneath;
2712 return find_default_run_target ("file I/O");
2715 /* File handle for target file operations. */
2719 /* The target on which this file is open. */
2720 struct target_ops *t;
2722 /* The file descriptor on the target. */
2726 DEF_VEC_O (fileio_fh_t);
2728 /* Vector of currently open file handles. The value returned by
2729 target_fileio_open and passed as the FD argument to other
2730 target_fileio_* functions is an index into this vector. This
2731 vector's entries are never freed; instead, files are marked as
2732 closed, and the handle becomes available for reuse. */
2733 static VEC (fileio_fh_t) *fileio_fhandles;
2735 /* Macro to check whether a fileio_fh_t represents a closed file. */
2736 #define is_closed_fileio_fh(fd) ((fd) < 0)
2738 /* Index into fileio_fhandles of the lowest handle that might be
2739 closed. This permits handle reuse without searching the whole
2740 list each time a new file is opened. */
2741 static int lowest_closed_fd;
2743 /* Acquire a target fileio file descriptor. */
2746 acquire_fileio_fd (struct target_ops *t, int fd)
2750 gdb_assert (!is_closed_fileio_fh (fd));
2752 /* Search for closed handles to reuse. */
2754 VEC_iterate (fileio_fh_t, fileio_fhandles,
2755 lowest_closed_fd, fh);
2757 if (is_closed_fileio_fh (fh->fd))
2760 /* Push a new handle if no closed handles were found. */
2761 if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles))
2762 fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL);
2764 /* Fill in the handle. */
2768 /* Return its index, and start the next lookup at
2770 return lowest_closed_fd++;
2773 /* Release a target fileio file descriptor. */
2776 release_fileio_fd (int fd, fileio_fh_t *fh)
2779 lowest_closed_fd = std::min (lowest_closed_fd, fd);
2782 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2784 #define fileio_fd_to_fh(fd) \
2785 VEC_index (fileio_fh_t, fileio_fhandles, (fd))
2787 /* Helper for target_fileio_open and
2788 target_fileio_open_warn_if_slow. */
2791 target_fileio_open_1 (struct inferior *inf, const char *filename,
2792 int flags, int mode, int warn_if_slow,
2795 struct target_ops *t;
2797 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2799 if (t->to_fileio_open != NULL)
2801 int fd = t->to_fileio_open (t, inf, filename, flags, mode,
2802 warn_if_slow, target_errno);
2807 fd = acquire_fileio_fd (t, fd);
2810 fprintf_unfiltered (gdb_stdlog,
2811 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2813 inf == NULL ? 0 : inf->num,
2814 filename, flags, mode,
2816 fd != -1 ? 0 : *target_errno);
2821 *target_errno = FILEIO_ENOSYS;
2828 target_fileio_open (struct inferior *inf, const char *filename,
2829 int flags, int mode, int *target_errno)
2831 return target_fileio_open_1 (inf, filename, flags, mode, 0,
2838 target_fileio_open_warn_if_slow (struct inferior *inf,
2839 const char *filename,
2840 int flags, int mode, int *target_errno)
2842 return target_fileio_open_1 (inf, filename, flags, mode, 1,
2849 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2850 ULONGEST offset, int *target_errno)
2852 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2855 if (is_closed_fileio_fh (fh->fd))
2856 *target_errno = EBADF;
2858 ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf,
2859 len, offset, target_errno);
2862 fprintf_unfiltered (gdb_stdlog,
2863 "target_fileio_pwrite (%d,...,%d,%s) "
2865 fd, len, pulongest (offset),
2866 ret, ret != -1 ? 0 : *target_errno);
2873 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
2874 ULONGEST offset, int *target_errno)
2876 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2879 if (is_closed_fileio_fh (fh->fd))
2880 *target_errno = EBADF;
2882 ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf,
2883 len, offset, target_errno);
2886 fprintf_unfiltered (gdb_stdlog,
2887 "target_fileio_pread (%d,...,%d,%s) "
2889 fd, len, pulongest (offset),
2890 ret, ret != -1 ? 0 : *target_errno);
2897 target_fileio_fstat (int fd, struct stat *sb, int *target_errno)
2899 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2902 if (is_closed_fileio_fh (fh->fd))
2903 *target_errno = EBADF;
2905 ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno);
2908 fprintf_unfiltered (gdb_stdlog,
2909 "target_fileio_fstat (%d) = %d (%d)\n",
2910 fd, ret, ret != -1 ? 0 : *target_errno);
2917 target_fileio_close (int fd, int *target_errno)
2919 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2922 if (is_closed_fileio_fh (fh->fd))
2923 *target_errno = EBADF;
2926 ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno);
2927 release_fileio_fd (fd, fh);
2931 fprintf_unfiltered (gdb_stdlog,
2932 "target_fileio_close (%d) = %d (%d)\n",
2933 fd, ret, ret != -1 ? 0 : *target_errno);
2940 target_fileio_unlink (struct inferior *inf, const char *filename,
2943 struct target_ops *t;
2945 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2947 if (t->to_fileio_unlink != NULL)
2949 int ret = t->to_fileio_unlink (t, inf, filename,
2953 fprintf_unfiltered (gdb_stdlog,
2954 "target_fileio_unlink (%d,%s)"
2956 inf == NULL ? 0 : inf->num, filename,
2957 ret, ret != -1 ? 0 : *target_errno);
2962 *target_errno = FILEIO_ENOSYS;
2969 target_fileio_readlink (struct inferior *inf, const char *filename,
2972 struct target_ops *t;
2974 for (t = default_fileio_target (); t != NULL; t = t->beneath)
2976 if (t->to_fileio_readlink != NULL)
2978 char *ret = t->to_fileio_readlink (t, inf, filename,
2982 fprintf_unfiltered (gdb_stdlog,
2983 "target_fileio_readlink (%d,%s)"
2985 inf == NULL ? 0 : inf->num,
2986 filename, ret? ret : "(nil)",
2987 ret? 0 : *target_errno);
2992 *target_errno = FILEIO_ENOSYS;
2997 target_fileio_close_cleanup (void *opaque)
2999 int fd = *(int *) opaque;
3002 target_fileio_close (fd, &target_errno);
3005 /* Read target file FILENAME, in the filesystem as seen by INF. If
3006 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3007 remote targets, the remote stub). Store the result in *BUF_P and
3008 return the size of the transferred data. PADDING additional bytes
3009 are available in *BUF_P. This is a helper function for
3010 target_fileio_read_alloc; see the declaration of that function for
3011 more information. */
3014 target_fileio_read_alloc_1 (struct inferior *inf, const char *filename,
3015 gdb_byte **buf_p, int padding)
3017 struct cleanup *close_cleanup;
3018 size_t buf_alloc, buf_pos;
3024 fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700,
3029 close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd);
3031 /* Start by reading up to 4K at a time. The target will throttle
3032 this number down if necessary. */
3034 buf = (gdb_byte *) xmalloc (buf_alloc);
3038 n = target_fileio_pread (fd, &buf[buf_pos],
3039 buf_alloc - buf_pos - padding, buf_pos,
3043 /* An error occurred. */
3044 do_cleanups (close_cleanup);
3050 /* Read all there was. */
3051 do_cleanups (close_cleanup);
3061 /* If the buffer is filling up, expand it. */
3062 if (buf_alloc < buf_pos * 2)
3065 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
3075 target_fileio_read_alloc (struct inferior *inf, const char *filename,
3078 return target_fileio_read_alloc_1 (inf, filename, buf_p, 0);
3083 gdb::unique_xmalloc_ptr<char>
3084 target_fileio_read_stralloc (struct inferior *inf, const char *filename)
3088 LONGEST i, transferred;
3090 transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1);
3091 bufstr = (char *) buffer;
3093 if (transferred < 0)
3094 return gdb::unique_xmalloc_ptr<char> (nullptr);
3096 if (transferred == 0)
3097 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
3099 bufstr[transferred] = 0;
3101 /* Check for embedded NUL bytes; but allow trailing NULs. */
3102 for (i = strlen (bufstr); i < transferred; i++)
3105 warning (_("target file %s "
3106 "contained unexpected null characters"),
3111 return gdb::unique_xmalloc_ptr<char> (bufstr);
3116 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3117 CORE_ADDR addr, int len)
3119 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3123 default_watchpoint_addr_within_range (struct target_ops *target,
3125 CORE_ADDR start, int length)
3127 return addr >= start && addr < start + length;
3130 static struct gdbarch *
3131 default_thread_architecture (struct target_ops *ops, ptid_t ptid)
3133 inferior *inf = find_inferior_ptid (ptid);
3134 gdb_assert (inf != NULL);
3135 return inf->gdbarch;
3139 return_zero (struct target_ops *ignore)
3145 return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2)
3151 * Find the next target down the stack from the specified target.
3155 find_target_beneath (struct target_ops *t)
3163 find_target_at (enum strata stratum)
3165 struct target_ops *t;
3167 for (t = current_target.beneath; t != NULL; t = t->beneath)
3168 if (t->to_stratum == stratum)
3179 target_announce_detach (int from_tty)
3182 const char *exec_file;
3187 exec_file = get_exec_file (0);
3188 if (exec_file == NULL)
3191 pid = ptid_get_pid (inferior_ptid);
3192 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
3193 target_pid_to_str (pid_to_ptid (pid)));
3194 gdb_flush (gdb_stdout);
3197 /* The inferior process has died. Long live the inferior! */
3200 generic_mourn_inferior (void)
3204 ptid = inferior_ptid;
3205 inferior_ptid = null_ptid;
3207 /* Mark breakpoints uninserted in case something tries to delete a
3208 breakpoint while we delete the inferior's threads (which would
3209 fail, since the inferior is long gone). */
3210 mark_breakpoints_out ();
3212 if (!ptid_equal (ptid, null_ptid))
3214 int pid = ptid_get_pid (ptid);
3215 exit_inferior (pid);
3218 /* Note this wipes step-resume breakpoints, so needs to be done
3219 after exit_inferior, which ends up referencing the step-resume
3220 breakpoints through clear_thread_inferior_resources. */
3221 breakpoint_init_inferior (inf_exited);
3223 registers_changed ();
3225 reopen_exec_file ();
3226 reinit_frame_cache ();
3228 if (deprecated_detach_hook)
3229 deprecated_detach_hook ();
3232 /* Convert a normal process ID to a string. Returns the string in a
3236 normal_pid_to_str (ptid_t ptid)
3238 static char buf[32];
3240 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
3245 default_pid_to_str (struct target_ops *ops, ptid_t ptid)
3247 return normal_pid_to_str (ptid);
3250 /* Error-catcher for target_find_memory_regions. */
3252 dummy_find_memory_regions (struct target_ops *self,
3253 find_memory_region_ftype ignore1, void *ignore2)
3255 error (_("Command not implemented for this target."));
3259 /* Error-catcher for target_make_corefile_notes. */
3261 dummy_make_corefile_notes (struct target_ops *self,
3262 bfd *ignore1, int *ignore2)
3264 error (_("Command not implemented for this target."));
3268 /* Set up the handful of non-empty slots needed by the dummy target
3272 init_dummy_target (void)
3274 dummy_target.to_shortname = "None";
3275 dummy_target.to_longname = "None";
3276 dummy_target.to_doc = "";
3277 dummy_target.to_supports_disable_randomization
3278 = find_default_supports_disable_randomization;
3279 dummy_target.to_stratum = dummy_stratum;
3280 dummy_target.to_has_all_memory = return_zero;
3281 dummy_target.to_has_memory = return_zero;
3282 dummy_target.to_has_stack = return_zero;
3283 dummy_target.to_has_registers = return_zero;
3284 dummy_target.to_has_execution = return_zero_has_execution;
3285 dummy_target.to_magic = OPS_MAGIC;
3287 install_dummy_methods (&dummy_target);
3292 target_close (struct target_ops *targ)
3294 gdb_assert (!target_is_pushed (targ));
3296 if (targ->to_xclose != NULL)
3297 targ->to_xclose (targ);
3298 else if (targ->to_close != NULL)
3299 targ->to_close (targ);
3302 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3306 target_thread_alive (ptid_t ptid)
3308 return current_target.to_thread_alive (¤t_target, ptid);
3312 target_update_thread_list (void)
3314 current_target.to_update_thread_list (¤t_target);
3318 target_stop (ptid_t ptid)
3322 warning (_("May not interrupt or stop the target, ignoring attempt"));
3326 (*current_target.to_stop) (¤t_target, ptid);
3330 target_interrupt (ptid_t ptid)
3334 warning (_("May not interrupt or stop the target, ignoring attempt"));
3338 (*current_target.to_interrupt) (¤t_target, ptid);
3344 target_pass_ctrlc (void)
3346 (*current_target.to_pass_ctrlc) (¤t_target);
3352 default_target_pass_ctrlc (struct target_ops *ops)
3354 target_interrupt (inferior_ptid);
3357 /* See target/target.h. */
3360 target_stop_and_wait (ptid_t ptid)
3362 struct target_waitstatus status;
3363 int was_non_stop = non_stop;
3368 memset (&status, 0, sizeof (status));
3369 target_wait (ptid, &status, 0);
3371 non_stop = was_non_stop;
3374 /* See target/target.h. */
3377 target_continue_no_signal (ptid_t ptid)
3379 target_resume (ptid, 0, GDB_SIGNAL_0);
3382 /* See target/target.h. */
3385 target_continue (ptid_t ptid, enum gdb_signal signal)
3387 target_resume (ptid, 0, signal);
3390 /* Concatenate ELEM to LIST, a comma separate list, and return the
3391 result. The LIST incoming argument is released. */
3394 str_comma_list_concat_elem (char *list, const char *elem)
3397 return xstrdup (elem);
3399 return reconcat (list, list, ", ", elem, (char *) NULL);
3402 /* Helper for target_options_to_string. If OPT is present in
3403 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3404 Returns the new resulting string. OPT is removed from
3408 do_option (int *target_options, char *ret,
3409 int opt, const char *opt_str)
3411 if ((*target_options & opt) != 0)
3413 ret = str_comma_list_concat_elem (ret, opt_str);
3414 *target_options &= ~opt;
3421 target_options_to_string (int target_options)
3425 #define DO_TARG_OPTION(OPT) \
3426 ret = do_option (&target_options, ret, OPT, #OPT)
3428 DO_TARG_OPTION (TARGET_WNOHANG);
3430 if (target_options != 0)
3431 ret = str_comma_list_concat_elem (ret, "unknown???");
3439 target_fetch_registers (struct regcache *regcache, int regno)
3441 current_target.to_fetch_registers (¤t_target, regcache, regno);
3443 regcache->debug_print_register ("target_fetch_registers", regno);
3447 target_store_registers (struct regcache *regcache, int regno)
3449 if (!may_write_registers)
3450 error (_("Writing to registers is not allowed (regno %d)"), regno);
3452 current_target.to_store_registers (¤t_target, regcache, regno);
3455 regcache->debug_print_register ("target_store_registers", regno);
3460 target_core_of_thread (ptid_t ptid)
3462 return current_target.to_core_of_thread (¤t_target, ptid);
3466 simple_verify_memory (struct target_ops *ops,
3467 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
3469 LONGEST total_xfered = 0;
3471 while (total_xfered < size)
3473 ULONGEST xfered_len;
3474 enum target_xfer_status status;
3476 ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered);
3478 status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
3479 buf, NULL, lma + total_xfered, howmuch,
3481 if (status == TARGET_XFER_OK
3482 && memcmp (data + total_xfered, buf, xfered_len) == 0)
3484 total_xfered += xfered_len;
3493 /* Default implementation of memory verification. */
3496 default_verify_memory (struct target_ops *self,
3497 const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3499 /* Start over from the top of the target stack. */
3500 return simple_verify_memory (current_target.beneath,
3501 data, memaddr, size);
3505 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3507 return current_target.to_verify_memory (¤t_target,
3508 data, memaddr, size);
3511 /* The documentation for this function is in its prototype declaration in
3515 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3516 enum target_hw_bp_type rw)
3518 return current_target.to_insert_mask_watchpoint (¤t_target,
3522 /* The documentation for this function is in its prototype declaration in
3526 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3527 enum target_hw_bp_type rw)
3529 return current_target.to_remove_mask_watchpoint (¤t_target,
3533 /* The documentation for this function is in its prototype declaration
3537 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3539 return current_target.to_masked_watch_num_registers (¤t_target,
3543 /* The documentation for this function is in its prototype declaration
3547 target_ranged_break_num_registers (void)
3549 return current_target.to_ranged_break_num_registers (¤t_target);
3555 target_supports_btrace (enum btrace_format format)
3557 return current_target.to_supports_btrace (¤t_target, format);
3562 struct btrace_target_info *
3563 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
3565 return current_target.to_enable_btrace (¤t_target, ptid, conf);
3571 target_disable_btrace (struct btrace_target_info *btinfo)
3573 current_target.to_disable_btrace (¤t_target, btinfo);
3579 target_teardown_btrace (struct btrace_target_info *btinfo)
3581 current_target.to_teardown_btrace (¤t_target, btinfo);
3587 target_read_btrace (struct btrace_data *btrace,
3588 struct btrace_target_info *btinfo,
3589 enum btrace_read_type type)
3591 return current_target.to_read_btrace (¤t_target, btrace, btinfo, type);
3596 const struct btrace_config *
3597 target_btrace_conf (const struct btrace_target_info *btinfo)
3599 return current_target.to_btrace_conf (¤t_target, btinfo);
3605 target_stop_recording (void)
3607 current_target.to_stop_recording (¤t_target);
3613 target_save_record (const char *filename)
3615 current_target.to_save_record (¤t_target, filename);
3621 target_supports_delete_record (void)
3623 struct target_ops *t;
3625 for (t = current_target.beneath; t != NULL; t = t->beneath)
3626 if (t->to_delete_record != delegate_delete_record
3627 && t->to_delete_record != tdefault_delete_record)
3636 target_delete_record (void)
3638 current_target.to_delete_record (¤t_target);
3644 target_record_method (ptid_t ptid)
3646 return current_target.to_record_method (¤t_target, ptid);
3652 target_record_is_replaying (ptid_t ptid)
3654 return current_target.to_record_is_replaying (¤t_target, ptid);
3660 target_record_will_replay (ptid_t ptid, int dir)
3662 return current_target.to_record_will_replay (¤t_target, ptid, dir);
3668 target_record_stop_replaying (void)
3670 current_target.to_record_stop_replaying (¤t_target);
3676 target_goto_record_begin (void)
3678 current_target.to_goto_record_begin (¤t_target);
3684 target_goto_record_end (void)
3686 current_target.to_goto_record_end (¤t_target);
3692 target_goto_record (ULONGEST insn)
3694 current_target.to_goto_record (¤t_target, insn);
3700 target_insn_history (int size, gdb_disassembly_flags flags)
3702 current_target.to_insn_history (¤t_target, size, flags);
3708 target_insn_history_from (ULONGEST from, int size,
3709 gdb_disassembly_flags flags)
3711 current_target.to_insn_history_from (¤t_target, from, size, flags);
3717 target_insn_history_range (ULONGEST begin, ULONGEST end,
3718 gdb_disassembly_flags flags)
3720 current_target.to_insn_history_range (¤t_target, begin, end, flags);
3726 target_call_history (int size, int flags)
3728 current_target.to_call_history (¤t_target, size, flags);
3734 target_call_history_from (ULONGEST begin, int size, int flags)
3736 current_target.to_call_history_from (¤t_target, begin, size, flags);
3742 target_call_history_range (ULONGEST begin, ULONGEST end, int flags)
3744 current_target.to_call_history_range (¤t_target, begin, end, flags);
3749 const struct frame_unwind *
3750 target_get_unwinder (void)
3752 return current_target.to_get_unwinder (¤t_target);
3757 const struct frame_unwind *
3758 target_get_tailcall_unwinder (void)
3760 return current_target.to_get_tailcall_unwinder (¤t_target);
3766 target_prepare_to_generate_core (void)
3768 current_target.to_prepare_to_generate_core (¤t_target);
3774 target_done_generating_core (void)
3776 current_target.to_done_generating_core (¤t_target);
3780 setup_target_debug (void)
3782 memcpy (&debug_target, ¤t_target, sizeof debug_target);
3784 init_debug_target (¤t_target);
3788 static char targ_desc[] =
3789 "Names of targets and files being debugged.\nShows the entire \
3790 stack of targets currently in use (including the exec-file,\n\
3791 core-file, and process, if any), as well as the symbol file name.";
3794 default_rcmd (struct target_ops *self, const char *command,
3795 struct ui_file *output)
3797 error (_("\"monitor\" command not supported by this target."));
3801 do_monitor_command (char *cmd,
3804 target_rcmd (cmd, gdb_stdtarg);
3807 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3811 flash_erase_command (char *cmd, int from_tty)
3813 /* Used to communicate termination of flash operations to the target. */
3814 bool found_flash_region = false;
3815 struct gdbarch *gdbarch = target_gdbarch ();
3817 std::vector<mem_region> mem_regions = target_memory_map ();
3819 /* Iterate over all memory regions. */
3820 for (const mem_region &m : mem_regions)
3822 /* Is this a flash memory region? */
3823 if (m.attrib.mode == MEM_FLASH)
3825 found_flash_region = true;
3826 target_flash_erase (m.lo, m.hi - m.lo);
3828 ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions");
3830 current_uiout->message (_("Erasing flash memory region at address "));
3831 current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo));
3832 current_uiout->message (", size = ");
3833 current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo));
3834 current_uiout->message ("\n");
3838 /* Did we do any flash operations? If so, we need to finalize them. */
3839 if (found_flash_region)
3840 target_flash_done ();
3842 current_uiout->message (_("No flash memory regions found.\n"));
3845 /* Print the name of each layers of our target stack. */
3848 maintenance_print_target_stack (const char *cmd, int from_tty)
3850 struct target_ops *t;
3852 printf_filtered (_("The current target stack is:\n"));
3854 for (t = target_stack; t != NULL; t = t->beneath)
3856 printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname);
3863 target_async (int enable)
3865 infrun_async (enable);
3866 current_target.to_async (¤t_target, enable);
3872 target_thread_events (int enable)
3874 current_target.to_thread_events (¤t_target, enable);
3877 /* Controls if targets can report that they can/are async. This is
3878 just for maintainers to use when debugging gdb. */
3879 int target_async_permitted = 1;
3881 /* The set command writes to this variable. If the inferior is
3882 executing, target_async_permitted is *not* updated. */
3883 static int target_async_permitted_1 = 1;
3886 maint_set_target_async_command (char *args, int from_tty,
3887 struct cmd_list_element *c)
3889 if (have_live_inferiors ())
3891 target_async_permitted_1 = target_async_permitted;
3892 error (_("Cannot change this setting while the inferior is running."));
3895 target_async_permitted = target_async_permitted_1;
3899 maint_show_target_async_command (struct ui_file *file, int from_tty,
3900 struct cmd_list_element *c,
3903 fprintf_filtered (file,
3904 _("Controlling the inferior in "
3905 "asynchronous mode is %s.\n"), value);
3908 /* Return true if the target operates in non-stop mode even with "set
3912 target_always_non_stop_p (void)
3914 return current_target.to_always_non_stop_p (¤t_target);
3920 target_is_non_stop_p (void)
3923 || target_non_stop_enabled == AUTO_BOOLEAN_TRUE
3924 || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO
3925 && target_always_non_stop_p ()));
3928 /* Controls if targets can report that they always run in non-stop
3929 mode. This is just for maintainers to use when debugging gdb. */
3930 enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO;
3932 /* The set command writes to this variable. If the inferior is
3933 executing, target_non_stop_enabled is *not* updated. */
3934 static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO;
3936 /* Implementation of "maint set target-non-stop". */
3939 maint_set_target_non_stop_command (char *args, int from_tty,
3940 struct cmd_list_element *c)
3942 if (have_live_inferiors ())
3944 target_non_stop_enabled_1 = target_non_stop_enabled;
3945 error (_("Cannot change this setting while the inferior is running."));
3948 target_non_stop_enabled = target_non_stop_enabled_1;
3951 /* Implementation of "maint show target-non-stop". */
3954 maint_show_target_non_stop_command (struct ui_file *file, int from_tty,
3955 struct cmd_list_element *c,
3958 if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO)
3959 fprintf_filtered (file,
3960 _("Whether the target is always in non-stop mode "
3961 "is %s (currently %s).\n"), value,
3962 target_always_non_stop_p () ? "on" : "off");
3964 fprintf_filtered (file,
3965 _("Whether the target is always in non-stop mode "
3966 "is %s.\n"), value);
3969 /* Temporary copies of permission settings. */
3971 static int may_write_registers_1 = 1;
3972 static int may_write_memory_1 = 1;
3973 static int may_insert_breakpoints_1 = 1;
3974 static int may_insert_tracepoints_1 = 1;
3975 static int may_insert_fast_tracepoints_1 = 1;
3976 static int may_stop_1 = 1;
3978 /* Make the user-set values match the real values again. */
3981 update_target_permissions (void)
3983 may_write_registers_1 = may_write_registers;
3984 may_write_memory_1 = may_write_memory;
3985 may_insert_breakpoints_1 = may_insert_breakpoints;
3986 may_insert_tracepoints_1 = may_insert_tracepoints;
3987 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3988 may_stop_1 = may_stop;
3991 /* The one function handles (most of) the permission flags in the same
3995 set_target_permissions (char *args, int from_tty,
3996 struct cmd_list_element *c)
3998 if (target_has_execution)
4000 update_target_permissions ();
4001 error (_("Cannot change this setting while the inferior is running."));
4004 /* Make the real values match the user-changed values. */
4005 may_write_registers = may_write_registers_1;
4006 may_insert_breakpoints = may_insert_breakpoints_1;
4007 may_insert_tracepoints = may_insert_tracepoints_1;
4008 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
4009 may_stop = may_stop_1;
4010 update_observer_mode ();
4013 /* Set memory write permission independently of observer mode. */
4016 set_write_memory_permission (char *args, int from_tty,
4017 struct cmd_list_element *c)
4019 /* Make the real values match the user-changed values. */
4020 may_write_memory = may_write_memory_1;
4021 update_observer_mode ();
4026 initialize_targets (void)
4028 init_dummy_target ();
4029 push_target (&dummy_target);
4031 add_info ("target", info_target_command, targ_desc);
4032 add_info ("files", info_target_command, targ_desc);
4034 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4035 Set target debugging."), _("\
4036 Show target debugging."), _("\
4037 When non-zero, target debugging is enabled. Higher numbers are more\n\
4041 &setdebuglist, &showdebuglist);
4043 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4044 &trust_readonly, _("\
4045 Set mode for reading from readonly sections."), _("\
4046 Show mode for reading from readonly sections."), _("\
4047 When this mode is on, memory reads from readonly sections (such as .text)\n\
4048 will be read from the object file instead of from the target. This will\n\
4049 result in significant performance improvement for remote targets."),
4051 show_trust_readonly,
4052 &setlist, &showlist);
4054 add_com ("monitor", class_obscure, do_monitor_command,
4055 _("Send a command to the remote monitor (remote targets only)."));
4057 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4058 _("Print the name of each layer of the internal target stack."),
4059 &maintenanceprintlist);
4061 add_setshow_boolean_cmd ("target-async", no_class,
4062 &target_async_permitted_1, _("\
4063 Set whether gdb controls the inferior in asynchronous mode."), _("\
4064 Show whether gdb controls the inferior in asynchronous mode."), _("\
4065 Tells gdb whether to control the inferior in asynchronous mode."),
4066 maint_set_target_async_command,
4067 maint_show_target_async_command,
4068 &maintenance_set_cmdlist,
4069 &maintenance_show_cmdlist);
4071 add_setshow_auto_boolean_cmd ("target-non-stop", no_class,
4072 &target_non_stop_enabled_1, _("\
4073 Set whether gdb always controls the inferior in non-stop mode."), _("\
4074 Show whether gdb always controls the inferior in non-stop mode."), _("\
4075 Tells gdb whether to control the inferior in non-stop mode."),
4076 maint_set_target_non_stop_command,
4077 maint_show_target_non_stop_command,
4078 &maintenance_set_cmdlist,
4079 &maintenance_show_cmdlist);
4081 add_setshow_boolean_cmd ("may-write-registers", class_support,
4082 &may_write_registers_1, _("\
4083 Set permission to write into registers."), _("\
4084 Show permission to write into registers."), _("\
4085 When this permission is on, GDB may write into the target's registers.\n\
4086 Otherwise, any sort of write attempt will result in an error."),
4087 set_target_permissions, NULL,
4088 &setlist, &showlist);
4090 add_setshow_boolean_cmd ("may-write-memory", class_support,
4091 &may_write_memory_1, _("\
4092 Set permission to write into target memory."), _("\
4093 Show permission to write into target memory."), _("\
4094 When this permission is on, GDB may write into the target's memory.\n\
4095 Otherwise, any sort of write attempt will result in an error."),
4096 set_write_memory_permission, NULL,
4097 &setlist, &showlist);
4099 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4100 &may_insert_breakpoints_1, _("\
4101 Set permission to insert breakpoints in the target."), _("\
4102 Show permission to insert breakpoints in the target."), _("\
4103 When this permission is on, GDB may insert breakpoints in the program.\n\
4104 Otherwise, any sort of insertion attempt will result in an error."),
4105 set_target_permissions, NULL,
4106 &setlist, &showlist);
4108 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4109 &may_insert_tracepoints_1, _("\
4110 Set permission to insert tracepoints in the target."), _("\
4111 Show permission to insert tracepoints in the target."), _("\
4112 When this permission is on, GDB may insert tracepoints in the program.\n\
4113 Otherwise, any sort of insertion attempt will result in an error."),
4114 set_target_permissions, NULL,
4115 &setlist, &showlist);
4117 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4118 &may_insert_fast_tracepoints_1, _("\
4119 Set permission to insert fast tracepoints in the target."), _("\
4120 Show permission to insert fast tracepoints in the target."), _("\
4121 When this permission is on, GDB may insert fast tracepoints.\n\
4122 Otherwise, any sort of insertion attempt will result in an error."),
4123 set_target_permissions, NULL,
4124 &setlist, &showlist);
4126 add_setshow_boolean_cmd ("may-interrupt", class_support,
4128 Set permission to interrupt or signal the target."), _("\
4129 Show permission to interrupt or signal the target."), _("\
4130 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4131 Otherwise, any attempt to interrupt or stop will be ignored."),
4132 set_target_permissions, NULL,
4133 &setlist, &showlist);
4135 add_com ("flash-erase", no_class, flash_erase_command,
4136 _("Erase all flash memory regions."));
4138 add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
4139 &auto_connect_native_target, _("\
4140 Set whether GDB may automatically connect to the native target."), _("\
4141 Show whether GDB may automatically connect to the native target."), _("\
4142 When on, and GDB is not connected to a target yet, GDB\n\
4143 attempts \"run\" and other commands with the native target."),
4144 NULL, show_auto_connect_native_target,
4145 &setlist, &showlist);