1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2018 Free Software Foundation, Inc.
5 Contributed by Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "target-dcache.h"
36 #include "target-descriptions.h"
37 #include "gdbthread.h"
40 #include "inline-frame.h"
41 #include "tracepoint.h"
42 #include "gdb/fileio.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "byte-vector.h"
52 #include <unordered_map>
54 static void generic_tls_error (void) ATTRIBUTE_NORETURN;
56 static void default_terminal_info (struct target_ops *, const char *, int);
58 static int default_watchpoint_addr_within_range (struct target_ops *,
59 CORE_ADDR, CORE_ADDR, int);
61 static int default_region_ok_for_hw_watchpoint (struct target_ops *,
64 static void default_rcmd (struct target_ops *, const char *, struct ui_file *);
66 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
69 static int default_follow_fork (struct target_ops *self, int follow_child,
72 static void default_mourn_inferior (struct target_ops *self);
74 static int default_search_memory (struct target_ops *ops,
76 ULONGEST search_space_len,
77 const gdb_byte *pattern,
79 CORE_ADDR *found_addrp);
81 static int default_verify_memory (struct target_ops *self,
83 CORE_ADDR memaddr, ULONGEST size);
85 static void tcomplain (void) ATTRIBUTE_NORETURN;
87 static struct target_ops *find_default_run_target (const char *);
89 static int dummy_find_memory_regions (struct target_ops *self,
90 find_memory_region_ftype ignore1,
93 static char *dummy_make_corefile_notes (struct target_ops *self,
94 bfd *ignore1, int *ignore2);
96 static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid);
98 static enum exec_direction_kind default_execution_direction
99 (struct target_ops *self);
101 /* Mapping between target_info objects (which have address identity)
102 and corresponding open/factory function/callback. Each add_target
103 call adds one entry to this map, and registers a "target
104 TARGET_NAME" command that when invoked calls the factory registered
105 here. The target_info object is associated with the command via
106 the command's context. */
107 static std::unordered_map<const target_info *, target_open_ftype *>
110 /* The initial current target, so that there is always a semi-valid
113 static struct target_ops *the_dummy_target;
114 static struct target_ops *the_debug_target;
116 /* The target stack. */
118 static target_stack g_target_stack;
120 /* Top of target stack. */
121 /* The target structure we are currently using to talk to a process
122 or file or whatever "inferior" we have. */
125 current_top_target ()
127 return g_target_stack.top ();
130 /* Command list for target. */
132 static struct cmd_list_element *targetlist = NULL;
134 /* Nonzero if we should trust readonly sections from the
135 executable when reading memory. */
137 static int trust_readonly = 0;
139 /* Nonzero if we should show true memory content including
140 memory breakpoint inserted by gdb. */
142 static int show_memory_breakpoints = 0;
144 /* These globals control whether GDB attempts to perform these
145 operations; they are useful for targets that need to prevent
146 inadvertant disruption, such as in non-stop mode. */
148 int may_write_registers = 1;
150 int may_write_memory = 1;
152 int may_insert_breakpoints = 1;
154 int may_insert_tracepoints = 1;
156 int may_insert_fast_tracepoints = 1;
160 /* Non-zero if we want to see trace of target level stuff. */
162 static unsigned int targetdebug = 0;
165 set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c)
168 push_target (the_debug_target);
170 unpush_target (the_debug_target);
174 show_targetdebug (struct ui_file *file, int from_tty,
175 struct cmd_list_element *c, const char *value)
177 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
180 /* The user just typed 'target' without the name of a target. */
183 target_command (const char *arg, int from_tty)
185 fputs_filtered ("Argument required (target name). Try `help target'\n",
190 target_has_all_memory_1 (void)
192 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
193 if (t->has_all_memory ())
200 target_has_memory_1 (void)
202 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
203 if (t->has_memory ())
210 target_has_stack_1 (void)
212 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
220 target_has_registers_1 (void)
222 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
223 if (t->has_registers ())
230 target_has_execution_1 (ptid_t the_ptid)
232 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
233 if (t->has_execution (the_ptid))
240 target_has_execution_current (void)
242 return target_has_execution_1 (inferior_ptid);
245 /* This is used to implement the various target commands. */
248 open_target (const char *args, int from_tty, struct cmd_list_element *command)
250 auto *ti = static_cast<target_info *> (get_cmd_context (command));
251 target_open_ftype *func = target_factories[ti];
254 fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n",
257 func (args, from_tty);
260 fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n",
261 ti->shortname, args, from_tty);
267 add_target (const target_info &t, target_open_ftype *func,
268 completer_ftype *completer)
270 struct cmd_list_element *c;
272 auto &func_slot = target_factories[&t];
273 if (func_slot != nullptr)
274 internal_error (__FILE__, __LINE__,
275 _("target already added (\"%s\")."), t.shortname);
278 if (targetlist == NULL)
279 add_prefix_cmd ("target", class_run, target_command, _("\
280 Connect to a target machine or process.\n\
281 The first argument is the type or protocol of the target machine.\n\
282 Remaining arguments are interpreted by the target protocol. For more\n\
283 information on the arguments for a particular protocol, type\n\
284 `help target ' followed by the protocol name."),
285 &targetlist, "target ", 0, &cmdlist);
286 c = add_cmd (t.shortname, no_class, t.doc, &targetlist);
287 set_cmd_context (c, (void *) &t);
288 set_cmd_sfunc (c, open_target);
289 if (completer != NULL)
290 set_cmd_completer (c, completer);
296 add_deprecated_target_alias (const target_info &tinfo, const char *alias)
298 struct cmd_list_element *c;
301 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
303 c = add_cmd (alias, no_class, tinfo.doc, &targetlist);
304 set_cmd_sfunc (c, open_target);
305 set_cmd_context (c, (void *) &tinfo);
306 alt = xstrprintf ("target %s", tinfo.shortname);
307 deprecate_cmd (c, alt);
315 current_top_target ()->kill ();
319 target_load (const char *arg, int from_tty)
321 target_dcache_invalidate ();
322 current_top_target ()->load (arg, from_tty);
327 target_terminal_state target_terminal::m_terminal_state
328 = target_terminal_state::is_ours;
330 /* See target/target.h. */
333 target_terminal::init (void)
335 current_top_target ()->terminal_init ();
337 m_terminal_state = target_terminal_state::is_ours;
340 /* See target/target.h. */
343 target_terminal::inferior (void)
345 struct ui *ui = current_ui;
347 /* A background resume (``run&'') should leave GDB in control of the
349 if (ui->prompt_state != PROMPT_BLOCKED)
352 /* Since we always run the inferior in the main console (unless "set
353 inferior-tty" is in effect), when some UI other than the main one
354 calls target_terminal::inferior, then we leave the main UI's
355 terminal settings as is. */
359 /* If GDB is resuming the inferior in the foreground, install
360 inferior's terminal modes. */
362 struct inferior *inf = current_inferior ();
364 if (inf->terminal_state != target_terminal_state::is_inferior)
366 current_top_target ()->terminal_inferior ();
367 inf->terminal_state = target_terminal_state::is_inferior;
370 m_terminal_state = target_terminal_state::is_inferior;
372 /* If the user hit C-c before, pretend that it was hit right
374 if (check_quit_flag ())
375 target_pass_ctrlc ();
378 /* See target/target.h. */
381 target_terminal::restore_inferior (void)
383 struct ui *ui = current_ui;
385 /* See target_terminal::inferior(). */
386 if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui)
389 /* Restore the terminal settings of inferiors that were in the
390 foreground but are now ours_for_output due to a temporary
391 target_target::ours_for_output() call. */
394 scoped_restore_current_inferior restore_inferior;
396 for (::inferior *inf : all_inferiors ())
398 if (inf->terminal_state == target_terminal_state::is_ours_for_output)
400 set_current_inferior (inf);
401 current_top_target ()->terminal_inferior ();
402 inf->terminal_state = target_terminal_state::is_inferior;
407 m_terminal_state = target_terminal_state::is_inferior;
409 /* If the user hit C-c before, pretend that it was hit right
411 if (check_quit_flag ())
412 target_pass_ctrlc ();
415 /* Switch terminal state to DESIRED_STATE, either is_ours, or
416 is_ours_for_output. */
419 target_terminal_is_ours_kind (target_terminal_state desired_state)
421 scoped_restore_current_inferior restore_inferior;
423 /* Must do this in two passes. First, have all inferiors save the
424 current terminal settings. Then, after all inferiors have add a
425 chance to safely save the terminal settings, restore GDB's
426 terminal settings. */
428 for (inferior *inf : all_inferiors ())
430 if (inf->terminal_state == target_terminal_state::is_inferior)
432 set_current_inferior (inf);
433 current_top_target ()->terminal_save_inferior ();
437 for (inferior *inf : all_inferiors ())
439 /* Note we don't check is_inferior here like above because we
440 need to handle 'is_ours_for_output -> is_ours' too. Careful
441 to never transition from 'is_ours' to 'is_ours_for_output',
443 if (inf->terminal_state != target_terminal_state::is_ours
444 && inf->terminal_state != desired_state)
446 set_current_inferior (inf);
447 if (desired_state == target_terminal_state::is_ours)
448 current_top_target ()->terminal_ours ();
449 else if (desired_state == target_terminal_state::is_ours_for_output)
450 current_top_target ()->terminal_ours_for_output ();
452 gdb_assert_not_reached ("unhandled desired state");
453 inf->terminal_state = desired_state;
458 /* See target/target.h. */
461 target_terminal::ours ()
463 struct ui *ui = current_ui;
465 /* See target_terminal::inferior. */
469 if (m_terminal_state == target_terminal_state::is_ours)
472 target_terminal_is_ours_kind (target_terminal_state::is_ours);
473 m_terminal_state = target_terminal_state::is_ours;
476 /* See target/target.h. */
479 target_terminal::ours_for_output ()
481 struct ui *ui = current_ui;
483 /* See target_terminal::inferior. */
487 if (!target_terminal::is_inferior ())
490 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output);
491 target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output;
494 /* See target/target.h. */
497 target_terminal::info (const char *arg, int from_tty)
499 current_top_target ()->terminal_info (arg, from_tty);
505 target_supports_terminal_ours (void)
507 /* This can be called before there is any target, so we must check
509 target_ops *top = current_top_target ();
513 return top->supports_terminal_ours ();
519 error (_("You can't do that when your target is `%s'"),
520 current_top_target ()->shortname ());
526 error (_("You can't do that without a process to debug."));
530 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
532 printf_unfiltered (_("No saved terminal information.\n"));
535 /* A default implementation for the to_get_ada_task_ptid target method.
537 This function builds the PTID by using both LWP and TID as part of
538 the PTID lwp and tid elements. The pid used is the pid of the
542 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
544 return ptid_t (inferior_ptid.pid (), lwp, tid);
547 static enum exec_direction_kind
548 default_execution_direction (struct target_ops *self)
550 if (!target_can_execute_reverse)
552 else if (!target_can_async_p ())
555 gdb_assert_not_reached ("\
556 to_execution_direction must be implemented for reverse async");
562 target_stack::push (target_ops *t)
564 /* If there's already a target at this stratum, remove it. */
565 strata stratum = t->stratum ();
567 if (m_stack[stratum] != NULL)
569 target_ops *prev = m_stack[stratum];
570 m_stack[stratum] = NULL;
574 /* Now add the new one. */
575 m_stack[stratum] = t;
584 push_target (struct target_ops *t)
586 g_target_stack.push (t);
592 unpush_target (struct target_ops *t)
594 return g_target_stack.unpush (t);
600 target_stack::unpush (target_ops *t)
602 strata stratum = t->stratum ();
604 if (stratum == dummy_stratum)
605 internal_error (__FILE__, __LINE__,
606 _("Attempt to unpush the dummy target"));
608 gdb_assert (t != NULL);
610 /* Look for the specified target. Note that a target can only occur
611 once in the target stack. */
613 if (m_stack[stratum] != t)
615 /* If T wasn't pushed, quit. Only open targets should be
620 /* Unchain the target. */
621 m_stack[stratum] = NULL;
623 if (m_top == stratum)
624 m_top = t->beneath ()->stratum ();
626 /* Finally close the target. Note we do this after unchaining, so
627 any target method calls from within the target_close
628 implementation don't end up in T anymore. */
634 /* Unpush TARGET and assert that it worked. */
637 unpush_target_and_assert (struct target_ops *target)
639 if (!unpush_target (target))
641 fprintf_unfiltered (gdb_stderr,
642 "pop_all_targets couldn't find target %s\n",
643 target->shortname ());
644 internal_error (__FILE__, __LINE__,
645 _("failed internal consistency check"));
650 pop_all_targets_above (enum strata above_stratum)
652 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum)
653 unpush_target_and_assert (current_top_target ());
659 pop_all_targets_at_and_above (enum strata stratum)
661 while ((int) (current_top_target ()->stratum ()) >= (int) stratum)
662 unpush_target_and_assert (current_top_target ());
666 pop_all_targets (void)
668 pop_all_targets_above (dummy_stratum);
671 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
674 target_is_pushed (struct target_ops *t)
676 return g_target_stack.is_pushed (t);
679 /* Default implementation of to_get_thread_local_address. */
682 generic_tls_error (void)
684 throw_error (TLS_GENERIC_ERROR,
685 _("Cannot find thread-local variables on this target"));
688 /* Using the objfile specified in OBJFILE, find the address for the
689 current thread's thread-local storage with offset OFFSET. */
691 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
693 volatile CORE_ADDR addr = 0;
694 struct target_ops *target = current_top_target ();
696 if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ()))
698 ptid_t ptid = inferior_ptid;
704 /* Fetch the load module address for this objfile. */
705 lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (),
708 addr = target->get_thread_local_address (ptid, lm_addr, offset);
710 /* If an error occurred, print TLS related messages here. Otherwise,
711 throw the error to some higher catcher. */
712 CATCH (ex, RETURN_MASK_ALL)
714 int objfile_is_library = (objfile->flags & OBJF_SHARED);
718 case TLS_NO_LIBRARY_SUPPORT_ERROR:
719 error (_("Cannot find thread-local variables "
720 "in this thread library."));
722 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
723 if (objfile_is_library)
724 error (_("Cannot find shared library `%s' in dynamic"
725 " linker's load module list"), objfile_name (objfile));
727 error (_("Cannot find executable file `%s' in dynamic"
728 " linker's load module list"), objfile_name (objfile));
730 case TLS_NOT_ALLOCATED_YET_ERROR:
731 if (objfile_is_library)
732 error (_("The inferior has not yet allocated storage for"
733 " thread-local variables in\n"
734 "the shared library `%s'\n"
736 objfile_name (objfile), target_pid_to_str (ptid));
738 error (_("The inferior has not yet allocated storage for"
739 " thread-local variables in\n"
740 "the executable `%s'\n"
742 objfile_name (objfile), target_pid_to_str (ptid));
744 case TLS_GENERIC_ERROR:
745 if (objfile_is_library)
746 error (_("Cannot find thread-local storage for %s, "
747 "shared library %s:\n%s"),
748 target_pid_to_str (ptid),
749 objfile_name (objfile), ex.message);
751 error (_("Cannot find thread-local storage for %s, "
752 "executable file %s:\n%s"),
753 target_pid_to_str (ptid),
754 objfile_name (objfile), ex.message);
757 throw_exception (ex);
763 /* It wouldn't be wrong here to try a gdbarch method, too; finding
764 TLS is an ABI-specific thing. But we don't do that yet. */
766 error (_("Cannot find thread-local variables on this target"));
772 target_xfer_status_to_string (enum target_xfer_status status)
774 #define CASE(X) case X: return #X
777 CASE(TARGET_XFER_E_IO);
778 CASE(TARGET_XFER_UNAVAILABLE);
787 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
789 /* target_read_string -- read a null terminated string, up to LEN bytes,
790 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
791 Set *STRING to a pointer to malloc'd memory containing the data; the caller
792 is responsible for freeing it. Return the number of bytes successfully
796 target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string,
797 int len, int *errnop)
803 int buffer_allocated;
805 unsigned int nbytes_read = 0;
809 /* Small for testing. */
810 buffer_allocated = 4;
811 buffer = (char *) xmalloc (buffer_allocated);
816 tlen = MIN (len, 4 - (memaddr & 3));
817 offset = memaddr & 3;
819 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
822 /* The transfer request might have crossed the boundary to an
823 unallocated region of memory. Retry the transfer, requesting
827 errcode = target_read_memory (memaddr, buf, 1);
832 if (bufptr - buffer + tlen > buffer_allocated)
836 bytes = bufptr - buffer;
837 buffer_allocated *= 2;
838 buffer = (char *) xrealloc (buffer, buffer_allocated);
839 bufptr = buffer + bytes;
842 for (i = 0; i < tlen; i++)
844 *bufptr++ = buf[i + offset];
845 if (buf[i + offset] == '\000')
847 nbytes_read += i + 1;
857 string->reset (buffer);
863 struct target_section_table *
864 target_get_section_table (struct target_ops *target)
866 return target->get_section_table ();
869 /* Find a section containing ADDR. */
871 struct target_section *
872 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
874 struct target_section_table *table = target_get_section_table (target);
875 struct target_section *secp;
880 for (secp = table->sections; secp < table->sections_end; secp++)
882 if (addr >= secp->addr && addr < secp->endaddr)
889 /* Helper for the memory xfer routines. Checks the attributes of the
890 memory region of MEMADDR against the read or write being attempted.
891 If the access is permitted returns true, otherwise returns false.
892 REGION_P is an optional output parameter. If not-NULL, it is
893 filled with a pointer to the memory region of MEMADDR. REG_LEN
894 returns LEN trimmed to the end of the region. This is how much the
895 caller can continue requesting, if the access is permitted. A
896 single xfer request must not straddle memory region boundaries. */
899 memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf,
900 ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len,
901 struct mem_region **region_p)
903 struct mem_region *region;
905 region = lookup_mem_region (memaddr);
907 if (region_p != NULL)
910 switch (region->attrib.mode)
913 if (writebuf != NULL)
923 /* We only support writing to flash during "load" for now. */
924 if (writebuf != NULL)
925 error (_("Writing to flash memory forbidden in this context"));
932 /* region->hi == 0 means there's no upper bound. */
933 if (memaddr + len < region->hi || region->hi == 0)
936 *reg_len = region->hi - memaddr;
941 /* Read memory from more than one valid target. A core file, for
942 instance, could have some of memory but delegate other bits to
943 the target below it. So, we must manually try all targets. */
945 enum target_xfer_status
946 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
947 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
948 ULONGEST *xfered_len)
950 enum target_xfer_status res;
954 res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL,
955 readbuf, writebuf, memaddr, len,
957 if (res == TARGET_XFER_OK)
960 /* Stop if the target reports that the memory is not available. */
961 if (res == TARGET_XFER_UNAVAILABLE)
964 /* We want to continue past core files to executables, but not
965 past a running target's memory. */
966 if (ops->has_all_memory ())
969 ops = ops->beneath ();
973 /* The cache works at the raw memory level. Make sure the cache
974 gets updated with raw contents no matter what kind of memory
975 object was originally being written. Note we do write-through
976 first, so that if it fails, we don't write to the cache contents
977 that never made it to the target. */
979 && inferior_ptid != null_ptid
980 && target_dcache_init_p ()
981 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
983 DCACHE *dcache = target_dcache_get ();
985 /* Note that writing to an area of memory which wasn't present
986 in the cache doesn't cause it to be loaded in. */
987 dcache_update (dcache, res, memaddr, writebuf, *xfered_len);
993 /* Perform a partial memory transfer.
994 For docs see target.h, to_xfer_partial. */
996 static enum target_xfer_status
997 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
998 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
999 ULONGEST len, ULONGEST *xfered_len)
1001 enum target_xfer_status res;
1003 struct mem_region *region;
1004 struct inferior *inf;
1006 /* For accesses to unmapped overlay sections, read directly from
1007 files. Must do this first, as MEMADDR may need adjustment. */
1008 if (readbuf != NULL && overlay_debugging)
1010 struct obj_section *section = find_pc_overlay (memaddr);
1012 if (pc_in_unmapped_range (memaddr, section))
1014 struct target_section_table *table
1015 = target_get_section_table (ops);
1016 const char *section_name = section->the_bfd_section->name;
1018 memaddr = overlay_mapped_address (memaddr, section);
1019 return section_table_xfer_memory_partial (readbuf, writebuf,
1020 memaddr, len, xfered_len,
1022 table->sections_end,
1027 /* Try the executable files, if "trust-readonly-sections" is set. */
1028 if (readbuf != NULL && trust_readonly)
1030 struct target_section *secp;
1031 struct target_section_table *table;
1033 secp = target_section_by_addr (ops, memaddr);
1035 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1036 secp->the_bfd_section)
1039 table = target_get_section_table (ops);
1040 return section_table_xfer_memory_partial (readbuf, writebuf,
1041 memaddr, len, xfered_len,
1043 table->sections_end,
1048 /* Try GDB's internal data cache. */
1050 if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len,
1052 return TARGET_XFER_E_IO;
1054 if (inferior_ptid != null_ptid)
1055 inf = current_inferior ();
1061 /* The dcache reads whole cache lines; that doesn't play well
1062 with reading from a trace buffer, because reading outside of
1063 the collected memory range fails. */
1064 && get_traceframe_number () == -1
1065 && (region->attrib.cache
1066 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1067 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1069 DCACHE *dcache = target_dcache_get_or_init ();
1071 return dcache_read_memory_partial (ops, dcache, memaddr, readbuf,
1072 reg_len, xfered_len);
1075 /* If none of those methods found the memory we wanted, fall back
1076 to a target partial transfer. Normally a single call to
1077 to_xfer_partial is enough; if it doesn't recognize an object
1078 it will call the to_xfer_partial of the next target down.
1079 But for memory this won't do. Memory is the only target
1080 object which can be read from more than one valid target.
1081 A core file, for instance, could have some of memory but
1082 delegate other bits to the target below it. So, we must
1083 manually try all targets. */
1085 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1088 /* If we still haven't got anything, return the last error. We
1093 /* Perform a partial memory transfer. For docs see target.h,
1096 static enum target_xfer_status
1097 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1098 gdb_byte *readbuf, const gdb_byte *writebuf,
1099 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1101 enum target_xfer_status res;
1103 /* Zero length requests are ok and require no work. */
1105 return TARGET_XFER_EOF;
1107 memaddr = address_significant (target_gdbarch (), memaddr);
1109 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1110 breakpoint insns, thus hiding out from higher layers whether
1111 there are software breakpoints inserted in the code stream. */
1112 if (readbuf != NULL)
1114 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1117 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1118 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len);
1122 /* A large write request is likely to be partially satisfied
1123 by memory_xfer_partial_1. We will continually malloc
1124 and free a copy of the entire write request for breakpoint
1125 shadow handling even though we only end up writing a small
1126 subset of it. Cap writes to a limit specified by the target
1127 to mitigate this. */
1128 len = std::min (ops->get_memory_xfer_limit (), len);
1130 gdb::byte_vector buf (writebuf, writebuf + len);
1131 breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len);
1132 res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len,
1139 scoped_restore_tmpl<int>
1140 make_scoped_restore_show_memory_breakpoints (int show)
1142 return make_scoped_restore (&show_memory_breakpoints, show);
1145 /* For docs see target.h, to_xfer_partial. */
1147 enum target_xfer_status
1148 target_xfer_partial (struct target_ops *ops,
1149 enum target_object object, const char *annex,
1150 gdb_byte *readbuf, const gdb_byte *writebuf,
1151 ULONGEST offset, ULONGEST len,
1152 ULONGEST *xfered_len)
1154 enum target_xfer_status retval;
1156 /* Transfer is done when LEN is zero. */
1158 return TARGET_XFER_EOF;
1160 if (writebuf && !may_write_memory)
1161 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1162 core_addr_to_string_nz (offset), plongest (len));
1166 /* If this is a memory transfer, let the memory-specific code
1167 have a look at it instead. Memory transfers are more
1169 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1170 || object == TARGET_OBJECT_CODE_MEMORY)
1171 retval = memory_xfer_partial (ops, object, readbuf,
1172 writebuf, offset, len, xfered_len);
1173 else if (object == TARGET_OBJECT_RAW_MEMORY)
1175 /* Skip/avoid accessing the target if the memory region
1176 attributes block the access. Check this here instead of in
1177 raw_memory_xfer_partial as otherwise we'd end up checking
1178 this twice in the case of the memory_xfer_partial path is
1179 taken; once before checking the dcache, and another in the
1180 tail call to raw_memory_xfer_partial. */
1181 if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len,
1183 return TARGET_XFER_E_IO;
1185 /* Request the normal memory object from other layers. */
1186 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1190 retval = ops->xfer_partial (object, annex, readbuf,
1191 writebuf, offset, len, xfered_len);
1195 const unsigned char *myaddr = NULL;
1197 fprintf_unfiltered (gdb_stdlog,
1198 "%s:target_xfer_partial "
1199 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1202 (annex ? annex : "(null)"),
1203 host_address_to_string (readbuf),
1204 host_address_to_string (writebuf),
1205 core_addr_to_string_nz (offset),
1206 pulongest (len), retval,
1207 pulongest (*xfered_len));
1213 if (retval == TARGET_XFER_OK && myaddr != NULL)
1217 fputs_unfiltered (", bytes =", gdb_stdlog);
1218 for (i = 0; i < *xfered_len; i++)
1220 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1222 if (targetdebug < 2 && i > 0)
1224 fprintf_unfiltered (gdb_stdlog, " ...");
1227 fprintf_unfiltered (gdb_stdlog, "\n");
1230 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1234 fputc_unfiltered ('\n', gdb_stdlog);
1237 /* Check implementations of to_xfer_partial update *XFERED_LEN
1238 properly. Do assertion after printing debug messages, so that we
1239 can find more clues on assertion failure from debugging messages. */
1240 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE)
1241 gdb_assert (*xfered_len > 0);
1246 /* Read LEN bytes of target memory at address MEMADDR, placing the
1247 results in GDB's memory at MYADDR. Returns either 0 for success or
1248 -1 if any error occurs.
1250 If an error occurs, no guarantee is made about the contents of the data at
1251 MYADDR. In particular, the caller should not depend upon partial reads
1252 filling the buffer with good data. There is no way for the caller to know
1253 how much good data might have been transfered anyway. Callers that can
1254 deal with partial reads should call target_read (which will retry until
1255 it makes no progress, and then return how much was transferred). */
1258 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1260 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL,
1261 myaddr, memaddr, len) == len)
1267 /* See target/target.h. */
1270 target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
1275 r = target_read_memory (memaddr, buf, sizeof buf);
1278 *result = extract_unsigned_integer (buf, sizeof buf,
1279 gdbarch_byte_order (target_gdbarch ()));
1283 /* Like target_read_memory, but specify explicitly that this is a read
1284 from the target's raw memory. That is, this read bypasses the
1285 dcache, breakpoint shadowing, etc. */
1288 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1290 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL,
1291 myaddr, memaddr, len) == len)
1297 /* Like target_read_memory, but specify explicitly that this is a read from
1298 the target's stack. This may trigger different cache behavior. */
1301 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1303 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL,
1304 myaddr, memaddr, len) == len)
1310 /* Like target_read_memory, but specify explicitly that this is a read from
1311 the target's code. This may trigger different cache behavior. */
1314 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1316 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL,
1317 myaddr, memaddr, len) == len)
1323 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1324 Returns either 0 for success or -1 if any error occurs. If an
1325 error occurs, no guarantee is made about how much data got written.
1326 Callers that can deal with partial writes should call
1330 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1332 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL,
1333 myaddr, memaddr, len) == len)
1339 /* Write LEN bytes from MYADDR to target raw memory at address
1340 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1341 If an error occurs, no guarantee is made about how much data got
1342 written. Callers that can deal with partial writes should call
1346 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1348 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL,
1349 myaddr, memaddr, len) == len)
1355 /* Fetch the target's memory map. */
1357 std::vector<mem_region>
1358 target_memory_map (void)
1360 std::vector<mem_region> result = current_top_target ()->memory_map ();
1361 if (result.empty ())
1364 std::sort (result.begin (), result.end ());
1366 /* Check that regions do not overlap. Simultaneously assign
1367 a numbering for the "mem" commands to use to refer to
1369 mem_region *last_one = NULL;
1370 for (size_t ix = 0; ix < result.size (); ix++)
1372 mem_region *this_one = &result[ix];
1373 this_one->number = ix;
1375 if (last_one != NULL && last_one->hi > this_one->lo)
1377 warning (_("Overlapping regions in memory map: ignoring"));
1378 return std::vector<mem_region> ();
1381 last_one = this_one;
1388 target_flash_erase (ULONGEST address, LONGEST length)
1390 current_top_target ()->flash_erase (address, length);
1394 target_flash_done (void)
1396 current_top_target ()->flash_done ();
1400 show_trust_readonly (struct ui_file *file, int from_tty,
1401 struct cmd_list_element *c, const char *value)
1403 fprintf_filtered (file,
1404 _("Mode for reading from readonly sections is %s.\n"),
1408 /* Target vector read/write partial wrapper functions. */
1410 static enum target_xfer_status
1411 target_read_partial (struct target_ops *ops,
1412 enum target_object object,
1413 const char *annex, gdb_byte *buf,
1414 ULONGEST offset, ULONGEST len,
1415 ULONGEST *xfered_len)
1417 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1421 static enum target_xfer_status
1422 target_write_partial (struct target_ops *ops,
1423 enum target_object object,
1424 const char *annex, const gdb_byte *buf,
1425 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1427 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1431 /* Wrappers to perform the full transfer. */
1433 /* For docs on target_read see target.h. */
1436 target_read (struct target_ops *ops,
1437 enum target_object object,
1438 const char *annex, gdb_byte *buf,
1439 ULONGEST offset, LONGEST len)
1441 LONGEST xfered_total = 0;
1444 /* If we are reading from a memory object, find the length of an addressable
1445 unit for that architecture. */
1446 if (object == TARGET_OBJECT_MEMORY
1447 || object == TARGET_OBJECT_STACK_MEMORY
1448 || object == TARGET_OBJECT_CODE_MEMORY
1449 || object == TARGET_OBJECT_RAW_MEMORY)
1450 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1452 while (xfered_total < len)
1454 ULONGEST xfered_partial;
1455 enum target_xfer_status status;
1457 status = target_read_partial (ops, object, annex,
1458 buf + xfered_total * unit_size,
1459 offset + xfered_total, len - xfered_total,
1462 /* Call an observer, notifying them of the xfer progress? */
1463 if (status == TARGET_XFER_EOF)
1464 return xfered_total;
1465 else if (status == TARGET_XFER_OK)
1467 xfered_total += xfered_partial;
1471 return TARGET_XFER_E_IO;
1477 /* Assuming that the entire [begin, end) range of memory cannot be
1478 read, try to read whatever subrange is possible to read.
1480 The function returns, in RESULT, either zero or one memory block.
1481 If there's a readable subrange at the beginning, it is completely
1482 read and returned. Any further readable subrange will not be read.
1483 Otherwise, if there's a readable subrange at the end, it will be
1484 completely read and returned. Any readable subranges before it
1485 (obviously, not starting at the beginning), will be ignored. In
1486 other cases -- either no readable subrange, or readable subrange(s)
1487 that is neither at the beginning, or end, nothing is returned.
1489 The purpose of this function is to handle a read across a boundary
1490 of accessible memory in a case when memory map is not available.
1491 The above restrictions are fine for this case, but will give
1492 incorrect results if the memory is 'patchy'. However, supporting
1493 'patchy' memory would require trying to read every single byte,
1494 and it seems unacceptable solution. Explicit memory map is
1495 recommended for this case -- and target_read_memory_robust will
1496 take care of reading multiple ranges then. */
1499 read_whatever_is_readable (struct target_ops *ops,
1500 const ULONGEST begin, const ULONGEST end,
1502 std::vector<memory_read_result> *result)
1504 ULONGEST current_begin = begin;
1505 ULONGEST current_end = end;
1507 ULONGEST xfered_len;
1509 /* If we previously failed to read 1 byte, nothing can be done here. */
1510 if (end - begin <= 1)
1513 gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin));
1515 /* Check that either first or the last byte is readable, and give up
1516 if not. This heuristic is meant to permit reading accessible memory
1517 at the boundary of accessible region. */
1518 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1519 buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK)
1524 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1525 buf.get () + (end - begin) - 1, end - 1, 1,
1526 &xfered_len) == TARGET_XFER_OK)
1534 /* Loop invariant is that the [current_begin, current_end) was previously
1535 found to be not readable as a whole.
1537 Note loop condition -- if the range has 1 byte, we can't divide the range
1538 so there's no point trying further. */
1539 while (current_end - current_begin > 1)
1541 ULONGEST first_half_begin, first_half_end;
1542 ULONGEST second_half_begin, second_half_end;
1544 ULONGEST middle = current_begin + (current_end - current_begin) / 2;
1548 first_half_begin = current_begin;
1549 first_half_end = middle;
1550 second_half_begin = middle;
1551 second_half_end = current_end;
1555 first_half_begin = middle;
1556 first_half_end = current_end;
1557 second_half_begin = current_begin;
1558 second_half_end = middle;
1561 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1562 buf.get () + (first_half_begin - begin) * unit_size,
1564 first_half_end - first_half_begin);
1566 if (xfer == first_half_end - first_half_begin)
1568 /* This half reads up fine. So, the error must be in the
1570 current_begin = second_half_begin;
1571 current_end = second_half_end;
1575 /* This half is not readable. Because we've tried one byte, we
1576 know some part of this half if actually readable. Go to the next
1577 iteration to divide again and try to read.
1579 We don't handle the other half, because this function only tries
1580 to read a single readable subrange. */
1581 current_begin = first_half_begin;
1582 current_end = first_half_end;
1588 /* The [begin, current_begin) range has been read. */
1589 result->emplace_back (begin, current_end, std::move (buf));
1593 /* The [current_end, end) range has been read. */
1594 LONGEST region_len = end - current_end;
1596 gdb::unique_xmalloc_ptr<gdb_byte> data
1597 ((gdb_byte *) xmalloc (region_len * unit_size));
1598 memcpy (data.get (), buf.get () + (current_end - begin) * unit_size,
1599 region_len * unit_size);
1600 result->emplace_back (current_end, end, std::move (data));
1604 std::vector<memory_read_result>
1605 read_memory_robust (struct target_ops *ops,
1606 const ULONGEST offset, const LONGEST len)
1608 std::vector<memory_read_result> result;
1609 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1611 LONGEST xfered_total = 0;
1612 while (xfered_total < len)
1614 struct mem_region *region = lookup_mem_region (offset + xfered_total);
1617 /* If there is no explicit region, a fake one should be created. */
1618 gdb_assert (region);
1620 if (region->hi == 0)
1621 region_len = len - xfered_total;
1623 region_len = region->hi - offset;
1625 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1627 /* Cannot read this region. Note that we can end up here only
1628 if the region is explicitly marked inaccessible, or
1629 'inaccessible-by-default' is in effect. */
1630 xfered_total += region_len;
1634 LONGEST to_read = std::min (len - xfered_total, region_len);
1635 gdb::unique_xmalloc_ptr<gdb_byte> buffer
1636 ((gdb_byte *) xmalloc (to_read * unit_size));
1638 LONGEST xfered_partial =
1639 target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (),
1640 offset + xfered_total, to_read);
1641 /* Call an observer, notifying them of the xfer progress? */
1642 if (xfered_partial <= 0)
1644 /* Got an error reading full chunk. See if maybe we can read
1646 read_whatever_is_readable (ops, offset + xfered_total,
1647 offset + xfered_total + to_read,
1648 unit_size, &result);
1649 xfered_total += to_read;
1653 result.emplace_back (offset + xfered_total,
1654 offset + xfered_total + xfered_partial,
1655 std::move (buffer));
1656 xfered_total += xfered_partial;
1666 /* An alternative to target_write with progress callbacks. */
1669 target_write_with_progress (struct target_ops *ops,
1670 enum target_object object,
1671 const char *annex, const gdb_byte *buf,
1672 ULONGEST offset, LONGEST len,
1673 void (*progress) (ULONGEST, void *), void *baton)
1675 LONGEST xfered_total = 0;
1678 /* If we are writing to a memory object, find the length of an addressable
1679 unit for that architecture. */
1680 if (object == TARGET_OBJECT_MEMORY
1681 || object == TARGET_OBJECT_STACK_MEMORY
1682 || object == TARGET_OBJECT_CODE_MEMORY
1683 || object == TARGET_OBJECT_RAW_MEMORY)
1684 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1686 /* Give the progress callback a chance to set up. */
1688 (*progress) (0, baton);
1690 while (xfered_total < len)
1692 ULONGEST xfered_partial;
1693 enum target_xfer_status status;
1695 status = target_write_partial (ops, object, annex,
1696 buf + xfered_total * unit_size,
1697 offset + xfered_total, len - xfered_total,
1700 if (status != TARGET_XFER_OK)
1701 return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO;
1704 (*progress) (xfered_partial, baton);
1706 xfered_total += xfered_partial;
1712 /* For docs on target_write see target.h. */
1715 target_write (struct target_ops *ops,
1716 enum target_object object,
1717 const char *annex, const gdb_byte *buf,
1718 ULONGEST offset, LONGEST len)
1720 return target_write_with_progress (ops, object, annex, buf, offset, len,
1724 /* Help for target_read_alloc and target_read_stralloc. See their comments
1727 template <typename T>
1728 gdb::optional<gdb::def_vector<T>>
1729 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1732 gdb::def_vector<T> buf;
1734 const int chunk = 4096;
1736 /* This function does not have a length parameter; it reads the
1737 entire OBJECT). Also, it doesn't support objects fetched partly
1738 from one target and partly from another (in a different stratum,
1739 e.g. a core file and an executable). Both reasons make it
1740 unsuitable for reading memory. */
1741 gdb_assert (object != TARGET_OBJECT_MEMORY);
1743 /* Start by reading up to 4K at a time. The target will throttle
1744 this number down if necessary. */
1747 ULONGEST xfered_len;
1748 enum target_xfer_status status;
1750 buf.resize (buf_pos + chunk);
1752 status = target_read_partial (ops, object, annex,
1753 (gdb_byte *) &buf[buf_pos],
1757 if (status == TARGET_XFER_EOF)
1759 /* Read all there was. */
1760 buf.resize (buf_pos);
1763 else if (status != TARGET_XFER_OK)
1765 /* An error occurred. */
1769 buf_pos += xfered_len;
1777 gdb::optional<gdb::byte_vector>
1778 target_read_alloc (struct target_ops *ops, enum target_object object,
1781 return target_read_alloc_1<gdb_byte> (ops, object, annex);
1786 gdb::optional<gdb::char_vector>
1787 target_read_stralloc (struct target_ops *ops, enum target_object object,
1790 gdb::optional<gdb::char_vector> buf
1791 = target_read_alloc_1<char> (ops, object, annex);
1796 if (buf->empty () || buf->back () != '\0')
1797 buf->push_back ('\0');
1799 /* Check for embedded NUL bytes; but allow trailing NULs. */
1800 for (auto it = std::find (buf->begin (), buf->end (), '\0');
1801 it != buf->end (); it++)
1804 warning (_("target object %d, annex %s, "
1805 "contained unexpected null characters"),
1806 (int) object, annex ? annex : "(none)");
1813 /* Memory transfer methods. */
1816 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1819 /* This method is used to read from an alternate, non-current
1820 target. This read must bypass the overlay support (as symbols
1821 don't match this target), and GDB's internal cache (wrong cache
1822 for this target). */
1823 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
1825 memory_error (TARGET_XFER_E_IO, addr);
1829 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
1830 int len, enum bfd_endian byte_order)
1832 gdb_byte buf[sizeof (ULONGEST)];
1834 gdb_assert (len <= sizeof (buf));
1835 get_target_memory (ops, addr, buf, len);
1836 return extract_unsigned_integer (buf, len, byte_order);
1842 target_insert_breakpoint (struct gdbarch *gdbarch,
1843 struct bp_target_info *bp_tgt)
1845 if (!may_insert_breakpoints)
1847 warning (_("May not insert breakpoints"));
1851 return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt);
1857 target_remove_breakpoint (struct gdbarch *gdbarch,
1858 struct bp_target_info *bp_tgt,
1859 enum remove_bp_reason reason)
1861 /* This is kind of a weird case to handle, but the permission might
1862 have been changed after breakpoints were inserted - in which case
1863 we should just take the user literally and assume that any
1864 breakpoints should be left in place. */
1865 if (!may_insert_breakpoints)
1867 warning (_("May not remove breakpoints"));
1871 return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason);
1875 info_target_command (const char *args, int from_tty)
1877 int has_all_mem = 0;
1879 if (symfile_objfile != NULL)
1880 printf_unfiltered (_("Symbols from \"%s\".\n"),
1881 objfile_name (symfile_objfile));
1883 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
1885 if (!t->has_memory ())
1888 if ((int) (t->stratum ()) <= (int) dummy_stratum)
1891 printf_unfiltered (_("\tWhile running this, "
1892 "GDB does not access memory from...\n"));
1893 printf_unfiltered ("%s:\n", t->longname ());
1895 has_all_mem = t->has_all_memory ();
1899 /* This function is called before any new inferior is created, e.g.
1900 by running a program, attaching, or connecting to a target.
1901 It cleans up any state from previous invocations which might
1902 change between runs. This is a subset of what target_preopen
1903 resets (things which might change between targets). */
1906 target_pre_inferior (int from_tty)
1908 /* Clear out solib state. Otherwise the solib state of the previous
1909 inferior might have survived and is entirely wrong for the new
1910 target. This has been observed on GNU/Linux using glibc 2.3. How
1922 Cannot access memory at address 0xdeadbeef
1925 /* In some OSs, the shared library list is the same/global/shared
1926 across inferiors. If code is shared between processes, so are
1927 memory regions and features. */
1928 if (!gdbarch_has_global_solist (target_gdbarch ()))
1930 no_shared_libraries (NULL, from_tty);
1932 invalidate_target_mem_regions ();
1934 target_clear_description ();
1937 /* attach_flag may be set if the previous process associated with
1938 the inferior was attached to. */
1939 current_inferior ()->attach_flag = 0;
1941 current_inferior ()->highest_thread_num = 0;
1943 agent_capability_invalidate ();
1946 /* Callback for iterate_over_inferiors. Gets rid of the given
1950 dispose_inferior (struct inferior *inf, void *args)
1952 /* Not all killed inferiors can, or will ever be, removed from the
1953 inferior list. Killed inferiors clearly don't need to be killed
1954 again, so, we're done. */
1958 thread_info *thread = any_thread_of_inferior (inf);
1961 switch_to_thread (thread);
1963 /* Core inferiors actually should be detached, not killed. */
1964 if (target_has_execution)
1967 target_detach (inf, 0);
1973 /* This is to be called by the open routine before it does
1977 target_preopen (int from_tty)
1981 if (have_inferiors ())
1984 || !have_live_inferiors ()
1985 || query (_("A program is being debugged already. Kill it? ")))
1986 iterate_over_inferiors (dispose_inferior, NULL);
1988 error (_("Program not killed."));
1991 /* Calling target_kill may remove the target from the stack. But if
1992 it doesn't (which seems like a win for UDI), remove it now. */
1993 /* Leave the exec target, though. The user may be switching from a
1994 live process to a core of the same program. */
1995 pop_all_targets_above (file_stratum);
1997 target_pre_inferior (from_tty);
2003 target_detach (inferior *inf, int from_tty)
2005 /* As long as some to_detach implementations rely on the current_inferior
2006 (either directly, or indirectly, like through target_gdbarch or by
2007 reading memory), INF needs to be the current inferior. When that
2008 requirement will become no longer true, then we can remove this
2010 gdb_assert (inf == current_inferior ());
2012 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2013 /* Don't remove global breakpoints here. They're removed on
2014 disconnection from the target. */
2017 /* If we're in breakpoints-always-inserted mode, have to remove
2018 breakpoints before detaching. */
2019 remove_breakpoints_inf (current_inferior ());
2021 prepare_for_detach ();
2023 current_top_target ()->detach (inf, from_tty);
2027 target_disconnect (const char *args, int from_tty)
2029 /* If we're in breakpoints-always-inserted mode or if breakpoints
2030 are global across processes, we have to remove them before
2032 remove_breakpoints ();
2034 current_top_target ()->disconnect (args, from_tty);
2037 /* See target/target.h. */
2040 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2042 return current_top_target ()->wait (ptid, status, options);
2048 default_target_wait (struct target_ops *ops,
2049 ptid_t ptid, struct target_waitstatus *status,
2052 status->kind = TARGET_WAITKIND_IGNORE;
2053 return minus_one_ptid;
2057 target_pid_to_str (ptid_t ptid)
2059 return current_top_target ()->pid_to_str (ptid);
2063 target_thread_name (struct thread_info *info)
2065 return current_top_target ()->thread_name (info);
2068 struct thread_info *
2069 target_thread_handle_to_thread_info (const gdb_byte *thread_handle,
2071 struct inferior *inf)
2073 return current_top_target ()->thread_handle_to_thread_info (thread_handle,
2078 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2080 target_dcache_invalidate ();
2082 current_top_target ()->resume (ptid, step, signal);
2084 registers_changed_ptid (ptid);
2085 /* We only set the internal executing state here. The user/frontend
2086 running state is set at a higher level. This also clears the
2087 thread's stop_pc as side effect. */
2088 set_executing (ptid, 1);
2089 clear_inline_frame_state (ptid);
2092 /* If true, target_commit_resume is a nop. */
2093 static int defer_target_commit_resume;
2098 target_commit_resume (void)
2100 if (defer_target_commit_resume)
2103 current_top_target ()->commit_resume ();
2108 scoped_restore_tmpl<int>
2109 make_scoped_defer_target_commit_resume ()
2111 return make_scoped_restore (&defer_target_commit_resume, 1);
2115 target_pass_signals (int numsigs, unsigned char *pass_signals)
2117 current_top_target ()->pass_signals (numsigs, pass_signals);
2121 target_program_signals (int numsigs, unsigned char *program_signals)
2123 current_top_target ()->program_signals (numsigs, program_signals);
2127 default_follow_fork (struct target_ops *self, int follow_child,
2130 /* Some target returned a fork event, but did not know how to follow it. */
2131 internal_error (__FILE__, __LINE__,
2132 _("could not find a target to follow fork"));
2135 /* Look through the list of possible targets for a target that can
2139 target_follow_fork (int follow_child, int detach_fork)
2141 return current_top_target ()->follow_fork (follow_child, detach_fork);
2144 /* Target wrapper for follow exec hook. */
2147 target_follow_exec (struct inferior *inf, char *execd_pathname)
2149 current_top_target ()->follow_exec (inf, execd_pathname);
2153 default_mourn_inferior (struct target_ops *self)
2155 internal_error (__FILE__, __LINE__,
2156 _("could not find a target to follow mourn inferior"));
2160 target_mourn_inferior (ptid_t ptid)
2162 gdb_assert (ptid == inferior_ptid);
2163 current_top_target ()->mourn_inferior ();
2165 /* We no longer need to keep handles on any of the object files.
2166 Make sure to release them to avoid unnecessarily locking any
2167 of them while we're not actually debugging. */
2168 bfd_cache_close_all ();
2171 /* Look for a target which can describe architectural features, starting
2172 from TARGET. If we find one, return its description. */
2174 const struct target_desc *
2175 target_read_description (struct target_ops *target)
2177 return target->read_description ();
2180 /* This implements a basic search of memory, reading target memory and
2181 performing the search here (as opposed to performing the search in on the
2182 target side with, for example, gdbserver). */
2185 simple_search_memory (struct target_ops *ops,
2186 CORE_ADDR start_addr, ULONGEST search_space_len,
2187 const gdb_byte *pattern, ULONGEST pattern_len,
2188 CORE_ADDR *found_addrp)
2190 /* NOTE: also defined in find.c testcase. */
2191 #define SEARCH_CHUNK_SIZE 16000
2192 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2193 /* Buffer to hold memory contents for searching. */
2194 unsigned search_buf_size;
2196 search_buf_size = chunk_size + pattern_len - 1;
2198 /* No point in trying to allocate a buffer larger than the search space. */
2199 if (search_space_len < search_buf_size)
2200 search_buf_size = search_space_len;
2202 gdb::byte_vector search_buf (search_buf_size);
2204 /* Prime the search buffer. */
2206 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2207 search_buf.data (), start_addr, search_buf_size)
2210 warning (_("Unable to access %s bytes of target "
2211 "memory at %s, halting search."),
2212 pulongest (search_buf_size), hex_string (start_addr));
2216 /* Perform the search.
2218 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2219 When we've scanned N bytes we copy the trailing bytes to the start and
2220 read in another N bytes. */
2222 while (search_space_len >= pattern_len)
2224 gdb_byte *found_ptr;
2225 unsigned nr_search_bytes
2226 = std::min (search_space_len, (ULONGEST) search_buf_size);
2228 found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes,
2229 pattern, pattern_len);
2231 if (found_ptr != NULL)
2233 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ());
2235 *found_addrp = found_addr;
2239 /* Not found in this chunk, skip to next chunk. */
2241 /* Don't let search_space_len wrap here, it's unsigned. */
2242 if (search_space_len >= chunk_size)
2243 search_space_len -= chunk_size;
2245 search_space_len = 0;
2247 if (search_space_len >= pattern_len)
2249 unsigned keep_len = search_buf_size - chunk_size;
2250 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2253 /* Copy the trailing part of the previous iteration to the front
2254 of the buffer for the next iteration. */
2255 gdb_assert (keep_len == pattern_len - 1);
2256 memcpy (&search_buf[0], &search_buf[chunk_size], keep_len);
2258 nr_to_read = std::min (search_space_len - keep_len,
2259 (ULONGEST) chunk_size);
2261 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2262 &search_buf[keep_len], read_addr,
2263 nr_to_read) != nr_to_read)
2265 warning (_("Unable to access %s bytes of target "
2266 "memory at %s, halting search."),
2267 plongest (nr_to_read),
2268 hex_string (read_addr));
2272 start_addr += chunk_size;
2281 /* Default implementation of memory-searching. */
2284 default_search_memory (struct target_ops *self,
2285 CORE_ADDR start_addr, ULONGEST search_space_len,
2286 const gdb_byte *pattern, ULONGEST pattern_len,
2287 CORE_ADDR *found_addrp)
2289 /* Start over from the top of the target stack. */
2290 return simple_search_memory (current_top_target (),
2291 start_addr, search_space_len,
2292 pattern, pattern_len, found_addrp);
2295 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2296 sequence of bytes in PATTERN with length PATTERN_LEN.
2298 The result is 1 if found, 0 if not found, and -1 if there was an error
2299 requiring halting of the search (e.g. memory read error).
2300 If the pattern is found the address is recorded in FOUND_ADDRP. */
2303 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2304 const gdb_byte *pattern, ULONGEST pattern_len,
2305 CORE_ADDR *found_addrp)
2307 return current_top_target ()->search_memory (start_addr, search_space_len,
2308 pattern, pattern_len, found_addrp);
2311 /* Look through the currently pushed targets. If none of them will
2312 be able to restart the currently running process, issue an error
2316 target_require_runnable (void)
2318 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2320 /* If this target knows how to create a new program, then
2321 assume we will still be able to after killing the current
2322 one. Either killing and mourning will not pop T, or else
2323 find_default_run_target will find it again. */
2324 if (t->can_create_inferior ())
2327 /* Do not worry about targets at certain strata that can not
2328 create inferiors. Assume they will be pushed again if
2329 necessary, and continue to the process_stratum. */
2330 if (t->stratum () > process_stratum)
2333 error (_("The \"%s\" target does not support \"run\". "
2334 "Try \"help target\" or \"continue\"."),
2338 /* This function is only called if the target is running. In that
2339 case there should have been a process_stratum target and it
2340 should either know how to create inferiors, or not... */
2341 internal_error (__FILE__, __LINE__, _("No targets found"));
2344 /* Whether GDB is allowed to fall back to the default run target for
2345 "run", "attach", etc. when no target is connected yet. */
2346 static int auto_connect_native_target = 1;
2349 show_auto_connect_native_target (struct ui_file *file, int from_tty,
2350 struct cmd_list_element *c, const char *value)
2352 fprintf_filtered (file,
2353 _("Whether GDB may automatically connect to the "
2354 "native target is %s.\n"),
2358 /* A pointer to the target that can respond to "run" or "attach".
2359 Native targets are always singletons and instantiated early at GDB
2361 static target_ops *the_native_target;
2366 set_native_target (target_ops *target)
2368 if (the_native_target != NULL)
2369 internal_error (__FILE__, __LINE__,
2370 _("native target already set (\"%s\")."),
2371 the_native_target->longname ());
2373 the_native_target = target;
2379 get_native_target ()
2381 return the_native_target;
2384 /* Look through the list of possible targets for a target that can
2385 execute a run or attach command without any other data. This is
2386 used to locate the default process stratum.
2388 If DO_MESG is not NULL, the result is always valid (error() is
2389 called for errors); else, return NULL on error. */
2391 static struct target_ops *
2392 find_default_run_target (const char *do_mesg)
2394 if (auto_connect_native_target && the_native_target != NULL)
2395 return the_native_target;
2397 if (do_mesg != NULL)
2398 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2405 find_attach_target (void)
2407 /* If a target on the current stack can attach, use it. */
2408 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2410 if (t->can_attach ())
2414 /* Otherwise, use the default run target for attaching. */
2415 return find_default_run_target ("attach");
2421 find_run_target (void)
2423 /* If a target on the current stack can run, use it. */
2424 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2426 if (t->can_create_inferior ())
2430 /* Otherwise, use the default run target. */
2431 return find_default_run_target ("run");
2435 target_ops::info_proc (const char *args, enum info_proc_what what)
2440 /* Implement the "info proc" command. */
2443 target_info_proc (const char *args, enum info_proc_what what)
2445 struct target_ops *t;
2447 /* If we're already connected to something that can get us OS
2448 related data, use it. Otherwise, try using the native
2450 t = find_target_at (process_stratum);
2452 t = find_default_run_target (NULL);
2454 for (; t != NULL; t = t->beneath ())
2456 if (t->info_proc (args, what))
2459 fprintf_unfiltered (gdb_stdlog,
2460 "target_info_proc (\"%s\", %d)\n", args, what);
2470 find_default_supports_disable_randomization (struct target_ops *self)
2472 struct target_ops *t;
2474 t = find_default_run_target (NULL);
2476 return t->supports_disable_randomization ();
2481 target_supports_disable_randomization (void)
2483 return current_top_target ()->supports_disable_randomization ();
2486 /* See target/target.h. */
2489 target_supports_multi_process (void)
2491 return current_top_target ()->supports_multi_process ();
2496 gdb::optional<gdb::char_vector>
2497 target_get_osdata (const char *type)
2499 struct target_ops *t;
2501 /* If we're already connected to something that can get us OS
2502 related data, use it. Otherwise, try using the native
2504 t = find_target_at (process_stratum);
2506 t = find_default_run_target ("get OS data");
2511 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2515 /* Determine the current address space of thread PTID. */
2517 struct address_space *
2518 target_thread_address_space (ptid_t ptid)
2520 struct address_space *aspace;
2522 aspace = current_top_target ()->thread_address_space (ptid);
2523 gdb_assert (aspace != NULL);
2531 target_ops::beneath () const
2533 return g_target_stack.find_beneath (this);
2537 target_ops::close ()
2542 target_ops::can_attach ()
2548 target_ops::attach (const char *, int)
2550 gdb_assert_not_reached ("target_ops::attach called");
2554 target_ops::can_create_inferior ()
2560 target_ops::create_inferior (const char *, const std::string &,
2563 gdb_assert_not_reached ("target_ops::create_inferior called");
2567 target_ops::can_run ()
2575 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2584 /* Target file operations. */
2586 static struct target_ops *
2587 default_fileio_target (void)
2589 struct target_ops *t;
2591 /* If we're already connected to something that can perform
2592 file I/O, use it. Otherwise, try using the native target. */
2593 t = find_target_at (process_stratum);
2596 return find_default_run_target ("file I/O");
2599 /* File handle for target file operations. */
2603 /* The target on which this file is open. NULL if the target is
2604 meanwhile closed while the handle is open. */
2607 /* The file descriptor on the target. */
2610 /* Check whether this fileio_fh_t represents a closed file. */
2613 return target_fd < 0;
2617 /* Vector of currently open file handles. The value returned by
2618 target_fileio_open and passed as the FD argument to other
2619 target_fileio_* functions is an index into this vector. This
2620 vector's entries are never freed; instead, files are marked as
2621 closed, and the handle becomes available for reuse. */
2622 static std::vector<fileio_fh_t> fileio_fhandles;
2624 /* Index into fileio_fhandles of the lowest handle that might be
2625 closed. This permits handle reuse without searching the whole
2626 list each time a new file is opened. */
2627 static int lowest_closed_fd;
2629 /* Invalidate the target associated with open handles that were open
2630 on target TARG, since we're about to close (and maybe destroy) the
2631 target. The handles remain open from the client's perspective, but
2632 trying to do anything with them other than closing them will fail
2636 fileio_handles_invalidate_target (target_ops *targ)
2638 for (fileio_fh_t &fh : fileio_fhandles)
2639 if (fh.target == targ)
2643 /* Acquire a target fileio file descriptor. */
2646 acquire_fileio_fd (target_ops *target, int target_fd)
2648 /* Search for closed handles to reuse. */
2649 for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++)
2651 fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd];
2653 if (fh.is_closed ())
2657 /* Push a new handle if no closed handles were found. */
2658 if (lowest_closed_fd == fileio_fhandles.size ())
2659 fileio_fhandles.push_back (fileio_fh_t {target, target_fd});
2661 fileio_fhandles[lowest_closed_fd] = {target, target_fd};
2663 /* Should no longer be marked closed. */
2664 gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ());
2666 /* Return its index, and start the next lookup at
2668 return lowest_closed_fd++;
2671 /* Release a target fileio file descriptor. */
2674 release_fileio_fd (int fd, fileio_fh_t *fh)
2677 lowest_closed_fd = std::min (lowest_closed_fd, fd);
2680 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2682 static fileio_fh_t *
2683 fileio_fd_to_fh (int fd)
2685 return &fileio_fhandles[fd];
2689 /* Default implementations of file i/o methods. We don't want these
2690 to delegate automatically, because we need to know which target
2691 supported the method, in order to call it directly from within
2692 pread/pwrite, etc. */
2695 target_ops::fileio_open (struct inferior *inf, const char *filename,
2696 int flags, int mode, int warn_if_slow,
2699 *target_errno = FILEIO_ENOSYS;
2704 target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2705 ULONGEST offset, int *target_errno)
2707 *target_errno = FILEIO_ENOSYS;
2712 target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len,
2713 ULONGEST offset, int *target_errno)
2715 *target_errno = FILEIO_ENOSYS;
2720 target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno)
2722 *target_errno = FILEIO_ENOSYS;
2727 target_ops::fileio_close (int fd, int *target_errno)
2729 *target_errno = FILEIO_ENOSYS;
2734 target_ops::fileio_unlink (struct inferior *inf, const char *filename,
2737 *target_errno = FILEIO_ENOSYS;
2741 gdb::optional<std::string>
2742 target_ops::fileio_readlink (struct inferior *inf, const char *filename,
2745 *target_errno = FILEIO_ENOSYS;
2749 /* Helper for target_fileio_open and
2750 target_fileio_open_warn_if_slow. */
2753 target_fileio_open_1 (struct inferior *inf, const char *filename,
2754 int flags, int mode, int warn_if_slow,
2757 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2759 int fd = t->fileio_open (inf, filename, flags, mode,
2760 warn_if_slow, target_errno);
2762 if (fd == -1 && *target_errno == FILEIO_ENOSYS)
2768 fd = acquire_fileio_fd (t, fd);
2771 fprintf_unfiltered (gdb_stdlog,
2772 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2774 inf == NULL ? 0 : inf->num,
2775 filename, flags, mode,
2777 fd != -1 ? 0 : *target_errno);
2781 *target_errno = FILEIO_ENOSYS;
2788 target_fileio_open (struct inferior *inf, const char *filename,
2789 int flags, int mode, int *target_errno)
2791 return target_fileio_open_1 (inf, filename, flags, mode, 0,
2798 target_fileio_open_warn_if_slow (struct inferior *inf,
2799 const char *filename,
2800 int flags, int mode, int *target_errno)
2802 return target_fileio_open_1 (inf, filename, flags, mode, 1,
2809 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2810 ULONGEST offset, int *target_errno)
2812 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2815 if (fh->is_closed ())
2816 *target_errno = EBADF;
2817 else if (fh->target == NULL)
2818 *target_errno = EIO;
2820 ret = fh->target->fileio_pwrite (fh->target_fd, write_buf,
2821 len, offset, target_errno);
2824 fprintf_unfiltered (gdb_stdlog,
2825 "target_fileio_pwrite (%d,...,%d,%s) "
2827 fd, len, pulongest (offset),
2828 ret, ret != -1 ? 0 : *target_errno);
2835 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
2836 ULONGEST offset, int *target_errno)
2838 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2841 if (fh->is_closed ())
2842 *target_errno = EBADF;
2843 else if (fh->target == NULL)
2844 *target_errno = EIO;
2846 ret = fh->target->fileio_pread (fh->target_fd, read_buf,
2847 len, offset, target_errno);
2850 fprintf_unfiltered (gdb_stdlog,
2851 "target_fileio_pread (%d,...,%d,%s) "
2853 fd, len, pulongest (offset),
2854 ret, ret != -1 ? 0 : *target_errno);
2861 target_fileio_fstat (int fd, struct stat *sb, int *target_errno)
2863 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2866 if (fh->is_closed ())
2867 *target_errno = EBADF;
2868 else if (fh->target == NULL)
2869 *target_errno = EIO;
2871 ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno);
2874 fprintf_unfiltered (gdb_stdlog,
2875 "target_fileio_fstat (%d) = %d (%d)\n",
2876 fd, ret, ret != -1 ? 0 : *target_errno);
2883 target_fileio_close (int fd, int *target_errno)
2885 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2888 if (fh->is_closed ())
2889 *target_errno = EBADF;
2892 if (fh->target != NULL)
2893 ret = fh->target->fileio_close (fh->target_fd,
2897 release_fileio_fd (fd, fh);
2901 fprintf_unfiltered (gdb_stdlog,
2902 "target_fileio_close (%d) = %d (%d)\n",
2903 fd, ret, ret != -1 ? 0 : *target_errno);
2910 target_fileio_unlink (struct inferior *inf, const char *filename,
2913 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2915 int ret = t->fileio_unlink (inf, filename, target_errno);
2917 if (ret == -1 && *target_errno == FILEIO_ENOSYS)
2921 fprintf_unfiltered (gdb_stdlog,
2922 "target_fileio_unlink (%d,%s)"
2924 inf == NULL ? 0 : inf->num, filename,
2925 ret, ret != -1 ? 0 : *target_errno);
2929 *target_errno = FILEIO_ENOSYS;
2935 gdb::optional<std::string>
2936 target_fileio_readlink (struct inferior *inf, const char *filename,
2939 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2941 gdb::optional<std::string> ret
2942 = t->fileio_readlink (inf, filename, target_errno);
2944 if (!ret.has_value () && *target_errno == FILEIO_ENOSYS)
2948 fprintf_unfiltered (gdb_stdlog,
2949 "target_fileio_readlink (%d,%s)"
2951 inf == NULL ? 0 : inf->num,
2952 filename, ret ? ret->c_str () : "(nil)",
2953 ret ? 0 : *target_errno);
2957 *target_errno = FILEIO_ENOSYS;
2961 /* Like scoped_fd, but specific to target fileio. */
2963 class scoped_target_fd
2966 explicit scoped_target_fd (int fd) noexcept
2971 ~scoped_target_fd ()
2977 target_fileio_close (m_fd, &target_errno);
2981 DISABLE_COPY_AND_ASSIGN (scoped_target_fd);
2983 int get () const noexcept
2992 /* Read target file FILENAME, in the filesystem as seen by INF. If
2993 INF is NULL, use the filesystem seen by the debugger (GDB or, for
2994 remote targets, the remote stub). Store the result in *BUF_P and
2995 return the size of the transferred data. PADDING additional bytes
2996 are available in *BUF_P. This is a helper function for
2997 target_fileio_read_alloc; see the declaration of that function for
2998 more information. */
3001 target_fileio_read_alloc_1 (struct inferior *inf, const char *filename,
3002 gdb_byte **buf_p, int padding)
3004 size_t buf_alloc, buf_pos;
3009 scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY,
3010 0700, &target_errno));
3011 if (fd.get () == -1)
3014 /* Start by reading up to 4K at a time. The target will throttle
3015 this number down if necessary. */
3017 buf = (gdb_byte *) xmalloc (buf_alloc);
3021 n = target_fileio_pread (fd.get (), &buf[buf_pos],
3022 buf_alloc - buf_pos - padding, buf_pos,
3026 /* An error occurred. */
3032 /* Read all there was. */
3042 /* If the buffer is filling up, expand it. */
3043 if (buf_alloc < buf_pos * 2)
3046 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
3056 target_fileio_read_alloc (struct inferior *inf, const char *filename,
3059 return target_fileio_read_alloc_1 (inf, filename, buf_p, 0);
3064 gdb::unique_xmalloc_ptr<char>
3065 target_fileio_read_stralloc (struct inferior *inf, const char *filename)
3069 LONGEST i, transferred;
3071 transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1);
3072 bufstr = (char *) buffer;
3074 if (transferred < 0)
3075 return gdb::unique_xmalloc_ptr<char> (nullptr);
3077 if (transferred == 0)
3078 return gdb::unique_xmalloc_ptr<char> (xstrdup (""));
3080 bufstr[transferred] = 0;
3082 /* Check for embedded NUL bytes; but allow trailing NULs. */
3083 for (i = strlen (bufstr); i < transferred; i++)
3086 warning (_("target file %s "
3087 "contained unexpected null characters"),
3092 return gdb::unique_xmalloc_ptr<char> (bufstr);
3097 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3098 CORE_ADDR addr, int len)
3100 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3104 default_watchpoint_addr_within_range (struct target_ops *target,
3106 CORE_ADDR start, int length)
3108 return addr >= start && addr < start + length;
3114 target_stack::find_beneath (const target_ops *t) const
3116 /* Look for a non-empty slot at stratum levels beneath T's. */
3117 for (int stratum = t->stratum () - 1; stratum >= 0; --stratum)
3118 if (m_stack[stratum] != NULL)
3119 return m_stack[stratum];
3127 find_target_at (enum strata stratum)
3129 return g_target_stack.at (stratum);
3137 target_announce_detach (int from_tty)
3140 const char *exec_file;
3145 exec_file = get_exec_file (0);
3146 if (exec_file == NULL)
3149 pid = inferior_ptid.pid ();
3150 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
3151 target_pid_to_str (ptid_t (pid)));
3152 gdb_flush (gdb_stdout);
3155 /* The inferior process has died. Long live the inferior! */
3158 generic_mourn_inferior (void)
3160 inferior *inf = current_inferior ();
3162 inferior_ptid = null_ptid;
3164 /* Mark breakpoints uninserted in case something tries to delete a
3165 breakpoint while we delete the inferior's threads (which would
3166 fail, since the inferior is long gone). */
3167 mark_breakpoints_out ();
3170 exit_inferior (inf);
3172 /* Note this wipes step-resume breakpoints, so needs to be done
3173 after exit_inferior, which ends up referencing the step-resume
3174 breakpoints through clear_thread_inferior_resources. */
3175 breakpoint_init_inferior (inf_exited);
3177 registers_changed ();
3179 reopen_exec_file ();
3180 reinit_frame_cache ();
3182 if (deprecated_detach_hook)
3183 deprecated_detach_hook ();
3186 /* Convert a normal process ID to a string. Returns the string in a
3190 normal_pid_to_str (ptid_t ptid)
3192 static char buf[32];
3194 xsnprintf (buf, sizeof buf, "process %d", ptid.pid ());
3199 default_pid_to_str (struct target_ops *ops, ptid_t ptid)
3201 return normal_pid_to_str (ptid);
3204 /* Error-catcher for target_find_memory_regions. */
3206 dummy_find_memory_regions (struct target_ops *self,
3207 find_memory_region_ftype ignore1, void *ignore2)
3209 error (_("Command not implemented for this target."));
3213 /* Error-catcher for target_make_corefile_notes. */
3215 dummy_make_corefile_notes (struct target_ops *self,
3216 bfd *ignore1, int *ignore2)
3218 error (_("Command not implemented for this target."));
3222 #include "target-delegates.c"
3225 static const target_info dummy_target_info = {
3232 dummy_target::stratum () const
3234 return dummy_stratum;
3238 debug_target::stratum () const
3240 return debug_stratum;
3244 dummy_target::info () const
3246 return dummy_target_info;
3250 debug_target::info () const
3252 return beneath ()->info ();
3258 target_close (struct target_ops *targ)
3260 gdb_assert (!target_is_pushed (targ));
3262 fileio_handles_invalidate_target (targ);
3267 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3271 target_thread_alive (ptid_t ptid)
3273 return current_top_target ()->thread_alive (ptid);
3277 target_update_thread_list (void)
3279 current_top_target ()->update_thread_list ();
3283 target_stop (ptid_t ptid)
3287 warning (_("May not interrupt or stop the target, ignoring attempt"));
3291 current_top_target ()->stop (ptid);
3299 warning (_("May not interrupt or stop the target, ignoring attempt"));
3303 current_top_target ()->interrupt ();
3309 target_pass_ctrlc (void)
3311 current_top_target ()->pass_ctrlc ();
3317 default_target_pass_ctrlc (struct target_ops *ops)
3319 target_interrupt ();
3322 /* See target/target.h. */
3325 target_stop_and_wait (ptid_t ptid)
3327 struct target_waitstatus status;
3328 int was_non_stop = non_stop;
3333 memset (&status, 0, sizeof (status));
3334 target_wait (ptid, &status, 0);
3336 non_stop = was_non_stop;
3339 /* See target/target.h. */
3342 target_continue_no_signal (ptid_t ptid)
3344 target_resume (ptid, 0, GDB_SIGNAL_0);
3347 /* See target/target.h. */
3350 target_continue (ptid_t ptid, enum gdb_signal signal)
3352 target_resume (ptid, 0, signal);
3355 /* Concatenate ELEM to LIST, a comma-separated list. */
3358 str_comma_list_concat_elem (std::string *list, const char *elem)
3360 if (!list->empty ())
3361 list->append (", ");
3363 list->append (elem);
3366 /* Helper for target_options_to_string. If OPT is present in
3367 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3368 OPT is removed from TARGET_OPTIONS. */
3371 do_option (int *target_options, std::string *ret,
3372 int opt, const char *opt_str)
3374 if ((*target_options & opt) != 0)
3376 str_comma_list_concat_elem (ret, opt_str);
3377 *target_options &= ~opt;
3384 target_options_to_string (int target_options)
3388 #define DO_TARG_OPTION(OPT) \
3389 do_option (&target_options, &ret, OPT, #OPT)
3391 DO_TARG_OPTION (TARGET_WNOHANG);
3393 if (target_options != 0)
3394 str_comma_list_concat_elem (&ret, "unknown???");
3400 target_fetch_registers (struct regcache *regcache, int regno)
3402 current_top_target ()->fetch_registers (regcache, regno);
3404 regcache->debug_print_register ("target_fetch_registers", regno);
3408 target_store_registers (struct regcache *regcache, int regno)
3410 if (!may_write_registers)
3411 error (_("Writing to registers is not allowed (regno %d)"), regno);
3413 current_top_target ()->store_registers (regcache, regno);
3416 regcache->debug_print_register ("target_store_registers", regno);
3421 target_core_of_thread (ptid_t ptid)
3423 return current_top_target ()->core_of_thread (ptid);
3427 simple_verify_memory (struct target_ops *ops,
3428 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
3430 LONGEST total_xfered = 0;
3432 while (total_xfered < size)
3434 ULONGEST xfered_len;
3435 enum target_xfer_status status;
3437 ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered);
3439 status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
3440 buf, NULL, lma + total_xfered, howmuch,
3442 if (status == TARGET_XFER_OK
3443 && memcmp (data + total_xfered, buf, xfered_len) == 0)
3445 total_xfered += xfered_len;
3454 /* Default implementation of memory verification. */
3457 default_verify_memory (struct target_ops *self,
3458 const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3460 /* Start over from the top of the target stack. */
3461 return simple_verify_memory (current_top_target (),
3462 data, memaddr, size);
3466 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3468 return current_top_target ()->verify_memory (data, memaddr, size);
3471 /* The documentation for this function is in its prototype declaration in
3475 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3476 enum target_hw_bp_type rw)
3478 return current_top_target ()->insert_mask_watchpoint (addr, mask, rw);
3481 /* The documentation for this function is in its prototype declaration in
3485 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3486 enum target_hw_bp_type rw)
3488 return current_top_target ()->remove_mask_watchpoint (addr, mask, rw);
3491 /* The documentation for this function is in its prototype declaration
3495 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3497 return current_top_target ()->masked_watch_num_registers (addr, mask);
3500 /* The documentation for this function is in its prototype declaration
3504 target_ranged_break_num_registers (void)
3506 return current_top_target ()->ranged_break_num_registers ();
3511 struct btrace_target_info *
3512 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
3514 return current_top_target ()->enable_btrace (ptid, conf);
3520 target_disable_btrace (struct btrace_target_info *btinfo)
3522 current_top_target ()->disable_btrace (btinfo);
3528 target_teardown_btrace (struct btrace_target_info *btinfo)
3530 current_top_target ()->teardown_btrace (btinfo);
3536 target_read_btrace (struct btrace_data *btrace,
3537 struct btrace_target_info *btinfo,
3538 enum btrace_read_type type)
3540 return current_top_target ()->read_btrace (btrace, btinfo, type);
3545 const struct btrace_config *
3546 target_btrace_conf (const struct btrace_target_info *btinfo)
3548 return current_top_target ()->btrace_conf (btinfo);
3554 target_stop_recording (void)
3556 current_top_target ()->stop_recording ();
3562 target_save_record (const char *filename)
3564 current_top_target ()->save_record (filename);
3570 target_supports_delete_record ()
3572 return current_top_target ()->supports_delete_record ();
3578 target_delete_record (void)
3580 current_top_target ()->delete_record ();
3586 target_record_method (ptid_t ptid)
3588 return current_top_target ()->record_method (ptid);
3594 target_record_is_replaying (ptid_t ptid)
3596 return current_top_target ()->record_is_replaying (ptid);
3602 target_record_will_replay (ptid_t ptid, int dir)
3604 return current_top_target ()->record_will_replay (ptid, dir);
3610 target_record_stop_replaying (void)
3612 current_top_target ()->record_stop_replaying ();
3618 target_goto_record_begin (void)
3620 current_top_target ()->goto_record_begin ();
3626 target_goto_record_end (void)
3628 current_top_target ()->goto_record_end ();
3634 target_goto_record (ULONGEST insn)
3636 current_top_target ()->goto_record (insn);
3642 target_insn_history (int size, gdb_disassembly_flags flags)
3644 current_top_target ()->insn_history (size, flags);
3650 target_insn_history_from (ULONGEST from, int size,
3651 gdb_disassembly_flags flags)
3653 current_top_target ()->insn_history_from (from, size, flags);
3659 target_insn_history_range (ULONGEST begin, ULONGEST end,
3660 gdb_disassembly_flags flags)
3662 current_top_target ()->insn_history_range (begin, end, flags);
3668 target_call_history (int size, record_print_flags flags)
3670 current_top_target ()->call_history (size, flags);
3676 target_call_history_from (ULONGEST begin, int size, record_print_flags flags)
3678 current_top_target ()->call_history_from (begin, size, flags);
3684 target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags)
3686 current_top_target ()->call_history_range (begin, end, flags);
3691 const struct frame_unwind *
3692 target_get_unwinder (void)
3694 return current_top_target ()->get_unwinder ();
3699 const struct frame_unwind *
3700 target_get_tailcall_unwinder (void)
3702 return current_top_target ()->get_tailcall_unwinder ();
3708 target_prepare_to_generate_core (void)
3710 current_top_target ()->prepare_to_generate_core ();
3716 target_done_generating_core (void)
3718 current_top_target ()->done_generating_core ();
3723 static char targ_desc[] =
3724 "Names of targets and files being debugged.\nShows the entire \
3725 stack of targets currently in use (including the exec-file,\n\
3726 core-file, and process, if any), as well as the symbol file name.";
3729 default_rcmd (struct target_ops *self, const char *command,
3730 struct ui_file *output)
3732 error (_("\"monitor\" command not supported by this target."));
3736 do_monitor_command (const char *cmd, int from_tty)
3738 target_rcmd (cmd, gdb_stdtarg);
3741 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3745 flash_erase_command (const char *cmd, int from_tty)
3747 /* Used to communicate termination of flash operations to the target. */
3748 bool found_flash_region = false;
3749 struct gdbarch *gdbarch = target_gdbarch ();
3751 std::vector<mem_region> mem_regions = target_memory_map ();
3753 /* Iterate over all memory regions. */
3754 for (const mem_region &m : mem_regions)
3756 /* Is this a flash memory region? */
3757 if (m.attrib.mode == MEM_FLASH)
3759 found_flash_region = true;
3760 target_flash_erase (m.lo, m.hi - m.lo);
3762 ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions");
3764 current_uiout->message (_("Erasing flash memory region at address "));
3765 current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo));
3766 current_uiout->message (", size = ");
3767 current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo));
3768 current_uiout->message ("\n");
3772 /* Did we do any flash operations? If so, we need to finalize them. */
3773 if (found_flash_region)
3774 target_flash_done ();
3776 current_uiout->message (_("No flash memory regions found.\n"));
3779 /* Print the name of each layers of our target stack. */
3782 maintenance_print_target_stack (const char *cmd, int from_tty)
3784 printf_filtered (_("The current target stack is:\n"));
3786 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
3788 if (t->stratum () == debug_stratum)
3790 printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ());
3797 target_async (int enable)
3799 infrun_async (enable);
3800 current_top_target ()->async (enable);
3806 target_thread_events (int enable)
3808 current_top_target ()->thread_events (enable);
3811 /* Controls if targets can report that they can/are async. This is
3812 just for maintainers to use when debugging gdb. */
3813 int target_async_permitted = 1;
3815 /* The set command writes to this variable. If the inferior is
3816 executing, target_async_permitted is *not* updated. */
3817 static int target_async_permitted_1 = 1;
3820 maint_set_target_async_command (const char *args, int from_tty,
3821 struct cmd_list_element *c)
3823 if (have_live_inferiors ())
3825 target_async_permitted_1 = target_async_permitted;
3826 error (_("Cannot change this setting while the inferior is running."));
3829 target_async_permitted = target_async_permitted_1;
3833 maint_show_target_async_command (struct ui_file *file, int from_tty,
3834 struct cmd_list_element *c,
3837 fprintf_filtered (file,
3838 _("Controlling the inferior in "
3839 "asynchronous mode is %s.\n"), value);
3842 /* Return true if the target operates in non-stop mode even with "set
3846 target_always_non_stop_p (void)
3848 return current_top_target ()->always_non_stop_p ();
3854 target_is_non_stop_p (void)
3857 || target_non_stop_enabled == AUTO_BOOLEAN_TRUE
3858 || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO
3859 && target_always_non_stop_p ()));
3862 /* Controls if targets can report that they always run in non-stop
3863 mode. This is just for maintainers to use when debugging gdb. */
3864 enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO;
3866 /* The set command writes to this variable. If the inferior is
3867 executing, target_non_stop_enabled is *not* updated. */
3868 static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO;
3870 /* Implementation of "maint set target-non-stop". */
3873 maint_set_target_non_stop_command (const char *args, int from_tty,
3874 struct cmd_list_element *c)
3876 if (have_live_inferiors ())
3878 target_non_stop_enabled_1 = target_non_stop_enabled;
3879 error (_("Cannot change this setting while the inferior is running."));
3882 target_non_stop_enabled = target_non_stop_enabled_1;
3885 /* Implementation of "maint show target-non-stop". */
3888 maint_show_target_non_stop_command (struct ui_file *file, int from_tty,
3889 struct cmd_list_element *c,
3892 if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO)
3893 fprintf_filtered (file,
3894 _("Whether the target is always in non-stop mode "
3895 "is %s (currently %s).\n"), value,
3896 target_always_non_stop_p () ? "on" : "off");
3898 fprintf_filtered (file,
3899 _("Whether the target is always in non-stop mode "
3900 "is %s.\n"), value);
3903 /* Temporary copies of permission settings. */
3905 static int may_write_registers_1 = 1;
3906 static int may_write_memory_1 = 1;
3907 static int may_insert_breakpoints_1 = 1;
3908 static int may_insert_tracepoints_1 = 1;
3909 static int may_insert_fast_tracepoints_1 = 1;
3910 static int may_stop_1 = 1;
3912 /* Make the user-set values match the real values again. */
3915 update_target_permissions (void)
3917 may_write_registers_1 = may_write_registers;
3918 may_write_memory_1 = may_write_memory;
3919 may_insert_breakpoints_1 = may_insert_breakpoints;
3920 may_insert_tracepoints_1 = may_insert_tracepoints;
3921 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3922 may_stop_1 = may_stop;
3925 /* The one function handles (most of) the permission flags in the same
3929 set_target_permissions (const char *args, int from_tty,
3930 struct cmd_list_element *c)
3932 if (target_has_execution)
3934 update_target_permissions ();
3935 error (_("Cannot change this setting while the inferior is running."));
3938 /* Make the real values match the user-changed values. */
3939 may_write_registers = may_write_registers_1;
3940 may_insert_breakpoints = may_insert_breakpoints_1;
3941 may_insert_tracepoints = may_insert_tracepoints_1;
3942 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
3943 may_stop = may_stop_1;
3944 update_observer_mode ();
3947 /* Set memory write permission independently of observer mode. */
3950 set_write_memory_permission (const char *args, int from_tty,
3951 struct cmd_list_element *c)
3953 /* Make the real values match the user-changed values. */
3954 may_write_memory = may_write_memory_1;
3955 update_observer_mode ();
3959 initialize_targets (void)
3961 the_dummy_target = new dummy_target ();
3962 push_target (the_dummy_target);
3964 the_debug_target = new debug_target ();
3966 add_info ("target", info_target_command, targ_desc);
3967 add_info ("files", info_target_command, targ_desc);
3969 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
3970 Set target debugging."), _("\
3971 Show target debugging."), _("\
3972 When non-zero, target debugging is enabled. Higher numbers are more\n\
3976 &setdebuglist, &showdebuglist);
3978 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
3979 &trust_readonly, _("\
3980 Set mode for reading from readonly sections."), _("\
3981 Show mode for reading from readonly sections."), _("\
3982 When this mode is on, memory reads from readonly sections (such as .text)\n\
3983 will be read from the object file instead of from the target. This will\n\
3984 result in significant performance improvement for remote targets."),
3986 show_trust_readonly,
3987 &setlist, &showlist);
3989 add_com ("monitor", class_obscure, do_monitor_command,
3990 _("Send a command to the remote monitor (remote targets only)."));
3992 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
3993 _("Print the name of each layer of the internal target stack."),
3994 &maintenanceprintlist);
3996 add_setshow_boolean_cmd ("target-async", no_class,
3997 &target_async_permitted_1, _("\
3998 Set whether gdb controls the inferior in asynchronous mode."), _("\
3999 Show whether gdb controls the inferior in asynchronous mode."), _("\
4000 Tells gdb whether to control the inferior in asynchronous mode."),
4001 maint_set_target_async_command,
4002 maint_show_target_async_command,
4003 &maintenance_set_cmdlist,
4004 &maintenance_show_cmdlist);
4006 add_setshow_auto_boolean_cmd ("target-non-stop", no_class,
4007 &target_non_stop_enabled_1, _("\
4008 Set whether gdb always controls the inferior in non-stop mode."), _("\
4009 Show whether gdb always controls the inferior in non-stop mode."), _("\
4010 Tells gdb whether to control the inferior in non-stop mode."),
4011 maint_set_target_non_stop_command,
4012 maint_show_target_non_stop_command,
4013 &maintenance_set_cmdlist,
4014 &maintenance_show_cmdlist);
4016 add_setshow_boolean_cmd ("may-write-registers", class_support,
4017 &may_write_registers_1, _("\
4018 Set permission to write into registers."), _("\
4019 Show permission to write into registers."), _("\
4020 When this permission is on, GDB may write into the target's registers.\n\
4021 Otherwise, any sort of write attempt will result in an error."),
4022 set_target_permissions, NULL,
4023 &setlist, &showlist);
4025 add_setshow_boolean_cmd ("may-write-memory", class_support,
4026 &may_write_memory_1, _("\
4027 Set permission to write into target memory."), _("\
4028 Show permission to write into target memory."), _("\
4029 When this permission is on, GDB may write into the target's memory.\n\
4030 Otherwise, any sort of write attempt will result in an error."),
4031 set_write_memory_permission, NULL,
4032 &setlist, &showlist);
4034 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4035 &may_insert_breakpoints_1, _("\
4036 Set permission to insert breakpoints in the target."), _("\
4037 Show permission to insert breakpoints in the target."), _("\
4038 When this permission is on, GDB may insert breakpoints in the program.\n\
4039 Otherwise, any sort of insertion attempt will result in an error."),
4040 set_target_permissions, NULL,
4041 &setlist, &showlist);
4043 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4044 &may_insert_tracepoints_1, _("\
4045 Set permission to insert tracepoints in the target."), _("\
4046 Show permission to insert tracepoints in the target."), _("\
4047 When this permission is on, GDB may insert tracepoints in the program.\n\
4048 Otherwise, any sort of insertion attempt will result in an error."),
4049 set_target_permissions, NULL,
4050 &setlist, &showlist);
4052 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4053 &may_insert_fast_tracepoints_1, _("\
4054 Set permission to insert fast tracepoints in the target."), _("\
4055 Show permission to insert fast tracepoints in the target."), _("\
4056 When this permission is on, GDB may insert fast tracepoints.\n\
4057 Otherwise, any sort of insertion attempt will result in an error."),
4058 set_target_permissions, NULL,
4059 &setlist, &showlist);
4061 add_setshow_boolean_cmd ("may-interrupt", class_support,
4063 Set permission to interrupt or signal the target."), _("\
4064 Show permission to interrupt or signal the target."), _("\
4065 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4066 Otherwise, any attempt to interrupt or stop will be ignored."),
4067 set_target_permissions, NULL,
4068 &setlist, &showlist);
4070 add_com ("flash-erase", no_class, flash_erase_command,
4071 _("Erase all flash memory regions."));
4073 add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
4074 &auto_connect_native_target, _("\
4075 Set whether GDB may automatically connect to the native target."), _("\
4076 Show whether GDB may automatically connect to the native target."), _("\
4077 When on, and GDB is not connected to a target yet, GDB\n\
4078 attempts \"run\" and other commands with the native target."),
4079 NULL, show_auto_connect_native_target,
4080 &setlist, &showlist);