1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990-2019 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"
43 #include "common/agent.h"
45 #include "target-debug.h"
47 #include "event-top.h"
49 #include "common/byte-vector.h"
51 #include <unordered_map>
53 static void generic_tls_error (void) ATTRIBUTE_NORETURN;
55 static void default_terminal_info (struct target_ops *, const char *, int);
57 static int default_watchpoint_addr_within_range (struct target_ops *,
58 CORE_ADDR, CORE_ADDR, int);
60 static int default_region_ok_for_hw_watchpoint (struct target_ops *,
63 static void default_rcmd (struct target_ops *, const char *, struct ui_file *);
65 static ptid_t default_get_ada_task_ptid (struct target_ops *self,
68 static int default_follow_fork (struct target_ops *self, int follow_child,
71 static void default_mourn_inferior (struct target_ops *self);
73 static int default_search_memory (struct target_ops *ops,
75 ULONGEST search_space_len,
76 const gdb_byte *pattern,
78 CORE_ADDR *found_addrp);
80 static int default_verify_memory (struct target_ops *self,
82 CORE_ADDR memaddr, ULONGEST size);
84 static void tcomplain (void) ATTRIBUTE_NORETURN;
86 static struct target_ops *find_default_run_target (const char *);
88 static int dummy_find_memory_regions (struct target_ops *self,
89 find_memory_region_ftype ignore1,
92 static char *dummy_make_corefile_notes (struct target_ops *self,
93 bfd *ignore1, int *ignore2);
95 static std::string default_pid_to_str (struct target_ops *ops, ptid_t ptid);
97 static enum exec_direction_kind default_execution_direction
98 (struct target_ops *self);
100 /* Mapping between target_info objects (which have address identity)
101 and corresponding open/factory function/callback. Each add_target
102 call adds one entry to this map, and registers a "target
103 TARGET_NAME" command that when invoked calls the factory registered
104 here. The target_info object is associated with the command via
105 the command's context. */
106 static std::unordered_map<const target_info *, target_open_ftype *>
109 /* The singleton debug target. */
111 static struct target_ops *the_debug_target;
113 /* The target stack. */
115 static target_stack g_target_stack;
117 /* Top of target stack. */
118 /* The target structure we are currently using to talk to a process
119 or file or whatever "inferior" we have. */
122 current_top_target ()
124 return g_target_stack.top ();
127 /* Command list for target. */
129 static struct cmd_list_element *targetlist = NULL;
131 /* Nonzero if we should trust readonly sections from the
132 executable when reading memory. */
134 static int trust_readonly = 0;
136 /* Nonzero if we should show true memory content including
137 memory breakpoint inserted by gdb. */
139 static int show_memory_breakpoints = 0;
141 /* These globals control whether GDB attempts to perform these
142 operations; they are useful for targets that need to prevent
143 inadvertant disruption, such as in non-stop mode. */
145 int may_write_registers = 1;
147 int may_write_memory = 1;
149 int may_insert_breakpoints = 1;
151 int may_insert_tracepoints = 1;
153 int may_insert_fast_tracepoints = 1;
157 /* Non-zero if we want to see trace of target level stuff. */
159 static unsigned int targetdebug = 0;
162 set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c)
165 push_target (the_debug_target);
167 unpush_target (the_debug_target);
171 show_targetdebug (struct ui_file *file, int from_tty,
172 struct cmd_list_element *c, const char *value)
174 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
177 /* The user just typed 'target' without the name of a target. */
180 target_command (const char *arg, int from_tty)
182 fputs_filtered ("Argument required (target name). Try `help target'\n",
187 target_has_all_memory_1 (void)
189 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
190 if (t->has_all_memory ())
197 target_has_memory_1 (void)
199 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
200 if (t->has_memory ())
207 target_has_stack_1 (void)
209 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
217 target_has_registers_1 (void)
219 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
220 if (t->has_registers ())
227 target_has_execution_1 (ptid_t the_ptid)
229 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
230 if (t->has_execution (the_ptid))
237 target_has_execution_current (void)
239 return target_has_execution_1 (inferior_ptid);
242 /* This is used to implement the various target commands. */
245 open_target (const char *args, int from_tty, struct cmd_list_element *command)
247 auto *ti = static_cast<target_info *> (get_cmd_context (command));
248 target_open_ftype *func = target_factories[ti];
251 fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n",
254 func (args, from_tty);
257 fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n",
258 ti->shortname, args, from_tty);
264 add_target (const target_info &t, target_open_ftype *func,
265 completer_ftype *completer)
267 struct cmd_list_element *c;
269 auto &func_slot = target_factories[&t];
270 if (func_slot != nullptr)
271 internal_error (__FILE__, __LINE__,
272 _("target already added (\"%s\")."), t.shortname);
275 if (targetlist == NULL)
276 add_prefix_cmd ("target", class_run, target_command, _("\
277 Connect to a target machine or process.\n\
278 The first argument is the type or protocol of the target machine.\n\
279 Remaining arguments are interpreted by the target protocol. For more\n\
280 information on the arguments for a particular protocol, type\n\
281 `help target ' followed by the protocol name."),
282 &targetlist, "target ", 0, &cmdlist);
283 c = add_cmd (t.shortname, no_class, t.doc, &targetlist);
284 set_cmd_context (c, (void *) &t);
285 set_cmd_sfunc (c, open_target);
286 if (completer != NULL)
287 set_cmd_completer (c, completer);
293 add_deprecated_target_alias (const target_info &tinfo, const char *alias)
295 struct cmd_list_element *c;
298 /* If we use add_alias_cmd, here, we do not get the deprecated warning,
300 c = add_cmd (alias, no_class, tinfo.doc, &targetlist);
301 set_cmd_sfunc (c, open_target);
302 set_cmd_context (c, (void *) &tinfo);
303 alt = xstrprintf ("target %s", tinfo.shortname);
304 deprecate_cmd (c, alt);
312 current_top_target ()->kill ();
316 target_load (const char *arg, int from_tty)
318 target_dcache_invalidate ();
319 current_top_target ()->load (arg, from_tty);
324 target_terminal_state target_terminal::m_terminal_state
325 = target_terminal_state::is_ours;
327 /* See target/target.h. */
330 target_terminal::init (void)
332 current_top_target ()->terminal_init ();
334 m_terminal_state = target_terminal_state::is_ours;
337 /* See target/target.h. */
340 target_terminal::inferior (void)
342 struct ui *ui = current_ui;
344 /* A background resume (``run&'') should leave GDB in control of the
346 if (ui->prompt_state != PROMPT_BLOCKED)
349 /* Since we always run the inferior in the main console (unless "set
350 inferior-tty" is in effect), when some UI other than the main one
351 calls target_terminal::inferior, then we leave the main UI's
352 terminal settings as is. */
356 /* If GDB is resuming the inferior in the foreground, install
357 inferior's terminal modes. */
359 struct inferior *inf = current_inferior ();
361 if (inf->terminal_state != target_terminal_state::is_inferior)
363 current_top_target ()->terminal_inferior ();
364 inf->terminal_state = target_terminal_state::is_inferior;
367 m_terminal_state = target_terminal_state::is_inferior;
369 /* If the user hit C-c before, pretend that it was hit right
371 if (check_quit_flag ())
372 target_pass_ctrlc ();
375 /* See target/target.h. */
378 target_terminal::restore_inferior (void)
380 struct ui *ui = current_ui;
382 /* See target_terminal::inferior(). */
383 if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui)
386 /* Restore the terminal settings of inferiors that were in the
387 foreground but are now ours_for_output due to a temporary
388 target_target::ours_for_output() call. */
391 scoped_restore_current_inferior restore_inferior;
393 for (::inferior *inf : all_inferiors ())
395 if (inf->terminal_state == target_terminal_state::is_ours_for_output)
397 set_current_inferior (inf);
398 current_top_target ()->terminal_inferior ();
399 inf->terminal_state = target_terminal_state::is_inferior;
404 m_terminal_state = target_terminal_state::is_inferior;
406 /* If the user hit C-c before, pretend that it was hit right
408 if (check_quit_flag ())
409 target_pass_ctrlc ();
412 /* Switch terminal state to DESIRED_STATE, either is_ours, or
413 is_ours_for_output. */
416 target_terminal_is_ours_kind (target_terminal_state desired_state)
418 scoped_restore_current_inferior restore_inferior;
420 /* Must do this in two passes. First, have all inferiors save the
421 current terminal settings. Then, after all inferiors have add a
422 chance to safely save the terminal settings, restore GDB's
423 terminal settings. */
425 for (inferior *inf : all_inferiors ())
427 if (inf->terminal_state == target_terminal_state::is_inferior)
429 set_current_inferior (inf);
430 current_top_target ()->terminal_save_inferior ();
434 for (inferior *inf : all_inferiors ())
436 /* Note we don't check is_inferior here like above because we
437 need to handle 'is_ours_for_output -> is_ours' too. Careful
438 to never transition from 'is_ours' to 'is_ours_for_output',
440 if (inf->terminal_state != target_terminal_state::is_ours
441 && inf->terminal_state != desired_state)
443 set_current_inferior (inf);
444 if (desired_state == target_terminal_state::is_ours)
445 current_top_target ()->terminal_ours ();
446 else if (desired_state == target_terminal_state::is_ours_for_output)
447 current_top_target ()->terminal_ours_for_output ();
449 gdb_assert_not_reached ("unhandled desired state");
450 inf->terminal_state = desired_state;
455 /* See target/target.h. */
458 target_terminal::ours ()
460 struct ui *ui = current_ui;
462 /* See target_terminal::inferior. */
466 if (m_terminal_state == target_terminal_state::is_ours)
469 target_terminal_is_ours_kind (target_terminal_state::is_ours);
470 m_terminal_state = target_terminal_state::is_ours;
473 /* See target/target.h. */
476 target_terminal::ours_for_output ()
478 struct ui *ui = current_ui;
480 /* See target_terminal::inferior. */
484 if (!target_terminal::is_inferior ())
487 target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output);
488 target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output;
491 /* See target/target.h. */
494 target_terminal::info (const char *arg, int from_tty)
496 current_top_target ()->terminal_info (arg, from_tty);
502 target_supports_terminal_ours (void)
504 /* This can be called before there is any target, so we must check
506 target_ops *top = current_top_target ();
510 return top->supports_terminal_ours ();
516 error (_("You can't do that when your target is `%s'"),
517 current_top_target ()->shortname ());
523 error (_("You can't do that without a process to debug."));
527 default_terminal_info (struct target_ops *self, const char *args, int from_tty)
529 printf_unfiltered (_("No saved terminal information.\n"));
532 /* A default implementation for the to_get_ada_task_ptid target method.
534 This function builds the PTID by using both LWP and TID as part of
535 the PTID lwp and tid elements. The pid used is the pid of the
539 default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid)
541 return ptid_t (inferior_ptid.pid (), lwp, tid);
544 static enum exec_direction_kind
545 default_execution_direction (struct target_ops *self)
547 if (!target_can_execute_reverse)
549 else if (!target_can_async_p ())
552 gdb_assert_not_reached ("\
553 to_execution_direction must be implemented for reverse async");
559 target_stack::push (target_ops *t)
561 /* If there's already a target at this stratum, remove it. */
562 strata stratum = t->stratum ();
564 if (m_stack[stratum] != NULL)
566 target_ops *prev = m_stack[stratum];
567 m_stack[stratum] = NULL;
571 /* Now add the new one. */
572 m_stack[stratum] = t;
581 push_target (struct target_ops *t)
583 g_target_stack.push (t);
589 push_target (target_ops_up &&t)
591 g_target_stack.push (t.get ());
598 unpush_target (struct target_ops *t)
600 return g_target_stack.unpush (t);
606 target_stack::unpush (target_ops *t)
608 gdb_assert (t != NULL);
610 strata stratum = t->stratum ();
612 if (stratum == dummy_stratum)
613 internal_error (__FILE__, __LINE__,
614 _("Attempt to unpush the dummy target"));
616 /* Look for the specified target. Note that a target can only occur
617 once in the target stack. */
619 if (m_stack[stratum] != t)
621 /* If T wasn't pushed, quit. Only open targets should be
626 /* Unchain the target. */
627 m_stack[stratum] = NULL;
629 if (m_top == stratum)
630 m_top = t->beneath ()->stratum ();
632 /* Finally close the target. Note we do this after unchaining, so
633 any target method calls from within the target_close
634 implementation don't end up in T anymore. */
640 /* Unpush TARGET and assert that it worked. */
643 unpush_target_and_assert (struct target_ops *target)
645 if (!unpush_target (target))
647 fprintf_unfiltered (gdb_stderr,
648 "pop_all_targets couldn't find target %s\n",
649 target->shortname ());
650 internal_error (__FILE__, __LINE__,
651 _("failed internal consistency check"));
656 pop_all_targets_above (enum strata above_stratum)
658 while ((int) (current_top_target ()->stratum ()) > (int) above_stratum)
659 unpush_target_and_assert (current_top_target ());
665 pop_all_targets_at_and_above (enum strata stratum)
667 while ((int) (current_top_target ()->stratum ()) >= (int) stratum)
668 unpush_target_and_assert (current_top_target ());
672 pop_all_targets (void)
674 pop_all_targets_above (dummy_stratum);
677 /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */
680 target_is_pushed (struct target_ops *t)
682 return g_target_stack.is_pushed (t);
685 /* Default implementation of to_get_thread_local_address. */
688 generic_tls_error (void)
690 throw_error (TLS_GENERIC_ERROR,
691 _("Cannot find thread-local variables on this target"));
694 /* Using the objfile specified in OBJFILE, find the address for the
695 current thread's thread-local storage with offset OFFSET. */
697 target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset)
699 volatile CORE_ADDR addr = 0;
700 struct target_ops *target = current_top_target ();
701 struct gdbarch *gdbarch = target_gdbarch ();
703 if (gdbarch_fetch_tls_load_module_address_p (gdbarch))
705 ptid_t ptid = inferior_ptid;
711 /* Fetch the load module address for this objfile. */
712 lm_addr = gdbarch_fetch_tls_load_module_address (gdbarch,
715 if (gdbarch_get_thread_local_address_p (gdbarch))
716 addr = gdbarch_get_thread_local_address (gdbarch, ptid, lm_addr,
719 addr = target->get_thread_local_address (ptid, lm_addr, offset);
721 /* If an error occurred, print TLS related messages here. Otherwise,
722 throw the error to some higher catcher. */
723 catch (const gdb_exception &ex)
725 int objfile_is_library = (objfile->flags & OBJF_SHARED);
729 case TLS_NO_LIBRARY_SUPPORT_ERROR:
730 error (_("Cannot find thread-local variables "
731 "in this thread library."));
733 case TLS_LOAD_MODULE_NOT_FOUND_ERROR:
734 if (objfile_is_library)
735 error (_("Cannot find shared library `%s' in dynamic"
736 " linker's load module list"), objfile_name (objfile));
738 error (_("Cannot find executable file `%s' in dynamic"
739 " linker's load module list"), objfile_name (objfile));
741 case TLS_NOT_ALLOCATED_YET_ERROR:
742 if (objfile_is_library)
743 error (_("The inferior has not yet allocated storage for"
744 " thread-local variables in\n"
745 "the shared library `%s'\n"
747 objfile_name (objfile),
748 target_pid_to_str (ptid).c_str ());
750 error (_("The inferior has not yet allocated storage for"
751 " thread-local variables in\n"
752 "the executable `%s'\n"
754 objfile_name (objfile),
755 target_pid_to_str (ptid).c_str ());
757 case TLS_GENERIC_ERROR:
758 if (objfile_is_library)
759 error (_("Cannot find thread-local storage for %s, "
760 "shared library %s:\n%s"),
761 target_pid_to_str (ptid).c_str (),
762 objfile_name (objfile), ex.what ());
764 error (_("Cannot find thread-local storage for %s, "
765 "executable file %s:\n%s"),
766 target_pid_to_str (ptid).c_str (),
767 objfile_name (objfile), ex.what ());
776 error (_("Cannot find thread-local variables on this target"));
782 target_xfer_status_to_string (enum target_xfer_status status)
784 #define CASE(X) case X: return #X
787 CASE(TARGET_XFER_E_IO);
788 CASE(TARGET_XFER_UNAVAILABLE);
797 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
799 /* target_read_string -- read a null terminated string, up to LEN bytes,
800 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
801 Set *STRING to a pointer to malloc'd memory containing the data; the caller
802 is responsible for freeing it. Return the number of bytes successfully
806 target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string,
807 int len, int *errnop)
813 int buffer_allocated;
815 unsigned int nbytes_read = 0;
819 /* Small for testing. */
820 buffer_allocated = 4;
821 buffer = (char *) xmalloc (buffer_allocated);
826 tlen = MIN (len, 4 - (memaddr & 3));
827 offset = memaddr & 3;
829 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
832 /* The transfer request might have crossed the boundary to an
833 unallocated region of memory. Retry the transfer, requesting
837 errcode = target_read_memory (memaddr, buf, 1);
842 if (bufptr - buffer + tlen > buffer_allocated)
846 bytes = bufptr - buffer;
847 buffer_allocated *= 2;
848 buffer = (char *) xrealloc (buffer, buffer_allocated);
849 bufptr = buffer + bytes;
852 for (i = 0; i < tlen; i++)
854 *bufptr++ = buf[i + offset];
855 if (buf[i + offset] == '\000')
857 nbytes_read += i + 1;
867 string->reset (buffer);
873 struct target_section_table *
874 target_get_section_table (struct target_ops *target)
876 return target->get_section_table ();
879 /* Find a section containing ADDR. */
881 struct target_section *
882 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
884 struct target_section_table *table = target_get_section_table (target);
885 struct target_section *secp;
890 for (secp = table->sections; secp < table->sections_end; secp++)
892 if (addr >= secp->addr && addr < secp->endaddr)
899 /* Helper for the memory xfer routines. Checks the attributes of the
900 memory region of MEMADDR against the read or write being attempted.
901 If the access is permitted returns true, otherwise returns false.
902 REGION_P is an optional output parameter. If not-NULL, it is
903 filled with a pointer to the memory region of MEMADDR. REG_LEN
904 returns LEN trimmed to the end of the region. This is how much the
905 caller can continue requesting, if the access is permitted. A
906 single xfer request must not straddle memory region boundaries. */
909 memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf,
910 ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len,
911 struct mem_region **region_p)
913 struct mem_region *region;
915 region = lookup_mem_region (memaddr);
917 if (region_p != NULL)
920 switch (region->attrib.mode)
923 if (writebuf != NULL)
933 /* We only support writing to flash during "load" for now. */
934 if (writebuf != NULL)
935 error (_("Writing to flash memory forbidden in this context"));
942 /* region->hi == 0 means there's no upper bound. */
943 if (memaddr + len < region->hi || region->hi == 0)
946 *reg_len = region->hi - memaddr;
951 /* Read memory from more than one valid target. A core file, for
952 instance, could have some of memory but delegate other bits to
953 the target below it. So, we must manually try all targets. */
955 enum target_xfer_status
956 raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
957 const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len,
958 ULONGEST *xfered_len)
960 enum target_xfer_status res;
964 res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL,
965 readbuf, writebuf, memaddr, len,
967 if (res == TARGET_XFER_OK)
970 /* Stop if the target reports that the memory is not available. */
971 if (res == TARGET_XFER_UNAVAILABLE)
974 /* We want to continue past core files to executables, but not
975 past a running target's memory. */
976 if (ops->has_all_memory ())
979 ops = ops->beneath ();
983 /* The cache works at the raw memory level. Make sure the cache
984 gets updated with raw contents no matter what kind of memory
985 object was originally being written. Note we do write-through
986 first, so that if it fails, we don't write to the cache contents
987 that never made it to the target. */
989 && inferior_ptid != null_ptid
990 && target_dcache_init_p ()
991 && (stack_cache_enabled_p () || code_cache_enabled_p ()))
993 DCACHE *dcache = target_dcache_get ();
995 /* Note that writing to an area of memory which wasn't present
996 in the cache doesn't cause it to be loaded in. */
997 dcache_update (dcache, res, memaddr, writebuf, *xfered_len);
1003 /* Perform a partial memory transfer.
1004 For docs see target.h, to_xfer_partial. */
1006 static enum target_xfer_status
1007 memory_xfer_partial_1 (struct target_ops *ops, enum target_object object,
1008 gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr,
1009 ULONGEST len, ULONGEST *xfered_len)
1011 enum target_xfer_status res;
1013 struct mem_region *region;
1014 struct inferior *inf;
1016 /* For accesses to unmapped overlay sections, read directly from
1017 files. Must do this first, as MEMADDR may need adjustment. */
1018 if (readbuf != NULL && overlay_debugging)
1020 struct obj_section *section = find_pc_overlay (memaddr);
1022 if (pc_in_unmapped_range (memaddr, section))
1024 struct target_section_table *table
1025 = target_get_section_table (ops);
1026 const char *section_name = section->the_bfd_section->name;
1028 memaddr = overlay_mapped_address (memaddr, section);
1029 return section_table_xfer_memory_partial (readbuf, writebuf,
1030 memaddr, len, xfered_len,
1032 table->sections_end,
1037 /* Try the executable files, if "trust-readonly-sections" is set. */
1038 if (readbuf != NULL && trust_readonly)
1040 struct target_section *secp;
1041 struct target_section_table *table;
1043 secp = target_section_by_addr (ops, memaddr);
1045 && (bfd_get_section_flags (secp->the_bfd_section->owner,
1046 secp->the_bfd_section)
1049 table = target_get_section_table (ops);
1050 return section_table_xfer_memory_partial (readbuf, writebuf,
1051 memaddr, len, xfered_len,
1053 table->sections_end,
1058 /* Try GDB's internal data cache. */
1060 if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len,
1062 return TARGET_XFER_E_IO;
1064 if (inferior_ptid != null_ptid)
1065 inf = current_inferior ();
1071 /* The dcache reads whole cache lines; that doesn't play well
1072 with reading from a trace buffer, because reading outside of
1073 the collected memory range fails. */
1074 && get_traceframe_number () == -1
1075 && (region->attrib.cache
1076 || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY)
1077 || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY)))
1079 DCACHE *dcache = target_dcache_get_or_init ();
1081 return dcache_read_memory_partial (ops, dcache, memaddr, readbuf,
1082 reg_len, xfered_len);
1085 /* If none of those methods found the memory we wanted, fall back
1086 to a target partial transfer. Normally a single call to
1087 to_xfer_partial is enough; if it doesn't recognize an object
1088 it will call the to_xfer_partial of the next target down.
1089 But for memory this won't do. Memory is the only target
1090 object which can be read from more than one valid target.
1091 A core file, for instance, could have some of memory but
1092 delegate other bits to the target below it. So, we must
1093 manually try all targets. */
1095 res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len,
1098 /* If we still haven't got anything, return the last error. We
1103 /* Perform a partial memory transfer. For docs see target.h,
1106 static enum target_xfer_status
1107 memory_xfer_partial (struct target_ops *ops, enum target_object object,
1108 gdb_byte *readbuf, const gdb_byte *writebuf,
1109 ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
1111 enum target_xfer_status res;
1113 /* Zero length requests are ok and require no work. */
1115 return TARGET_XFER_EOF;
1117 memaddr = address_significant (target_gdbarch (), memaddr);
1119 /* Fill in READBUF with breakpoint shadows, or WRITEBUF with
1120 breakpoint insns, thus hiding out from higher layers whether
1121 there are software breakpoints inserted in the code stream. */
1122 if (readbuf != NULL)
1124 res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len,
1127 if (res == TARGET_XFER_OK && !show_memory_breakpoints)
1128 breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len);
1132 /* A large write request is likely to be partially satisfied
1133 by memory_xfer_partial_1. We will continually malloc
1134 and free a copy of the entire write request for breakpoint
1135 shadow handling even though we only end up writing a small
1136 subset of it. Cap writes to a limit specified by the target
1137 to mitigate this. */
1138 len = std::min (ops->get_memory_xfer_limit (), len);
1140 gdb::byte_vector buf (writebuf, writebuf + len);
1141 breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len);
1142 res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len,
1149 scoped_restore_tmpl<int>
1150 make_scoped_restore_show_memory_breakpoints (int show)
1152 return make_scoped_restore (&show_memory_breakpoints, show);
1155 /* For docs see target.h, to_xfer_partial. */
1157 enum target_xfer_status
1158 target_xfer_partial (struct target_ops *ops,
1159 enum target_object object, const char *annex,
1160 gdb_byte *readbuf, const gdb_byte *writebuf,
1161 ULONGEST offset, ULONGEST len,
1162 ULONGEST *xfered_len)
1164 enum target_xfer_status retval;
1166 /* Transfer is done when LEN is zero. */
1168 return TARGET_XFER_EOF;
1170 if (writebuf && !may_write_memory)
1171 error (_("Writing to memory is not allowed (addr %s, len %s)"),
1172 core_addr_to_string_nz (offset), plongest (len));
1176 /* If this is a memory transfer, let the memory-specific code
1177 have a look at it instead. Memory transfers are more
1179 if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY
1180 || object == TARGET_OBJECT_CODE_MEMORY)
1181 retval = memory_xfer_partial (ops, object, readbuf,
1182 writebuf, offset, len, xfered_len);
1183 else if (object == TARGET_OBJECT_RAW_MEMORY)
1185 /* Skip/avoid accessing the target if the memory region
1186 attributes block the access. Check this here instead of in
1187 raw_memory_xfer_partial as otherwise we'd end up checking
1188 this twice in the case of the memory_xfer_partial path is
1189 taken; once before checking the dcache, and another in the
1190 tail call to raw_memory_xfer_partial. */
1191 if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len,
1193 return TARGET_XFER_E_IO;
1195 /* Request the normal memory object from other layers. */
1196 retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len,
1200 retval = ops->xfer_partial (object, annex, readbuf,
1201 writebuf, offset, len, xfered_len);
1205 const unsigned char *myaddr = NULL;
1207 fprintf_unfiltered (gdb_stdlog,
1208 "%s:target_xfer_partial "
1209 "(%d, %s, %s, %s, %s, %s) = %d, %s",
1212 (annex ? annex : "(null)"),
1213 host_address_to_string (readbuf),
1214 host_address_to_string (writebuf),
1215 core_addr_to_string_nz (offset),
1216 pulongest (len), retval,
1217 pulongest (*xfered_len));
1223 if (retval == TARGET_XFER_OK && myaddr != NULL)
1227 fputs_unfiltered (", bytes =", gdb_stdlog);
1228 for (i = 0; i < *xfered_len; i++)
1230 if ((((intptr_t) &(myaddr[i])) & 0xf) == 0)
1232 if (targetdebug < 2 && i > 0)
1234 fprintf_unfiltered (gdb_stdlog, " ...");
1237 fprintf_unfiltered (gdb_stdlog, "\n");
1240 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
1244 fputc_unfiltered ('\n', gdb_stdlog);
1247 /* Check implementations of to_xfer_partial update *XFERED_LEN
1248 properly. Do assertion after printing debug messages, so that we
1249 can find more clues on assertion failure from debugging messages. */
1250 if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE)
1251 gdb_assert (*xfered_len > 0);
1256 /* Read LEN bytes of target memory at address MEMADDR, placing the
1257 results in GDB's memory at MYADDR. Returns either 0 for success or
1258 -1 if any error occurs.
1260 If an error occurs, no guarantee is made about the contents of the data at
1261 MYADDR. In particular, the caller should not depend upon partial reads
1262 filling the buffer with good data. There is no way for the caller to know
1263 how much good data might have been transfered anyway. Callers that can
1264 deal with partial reads should call target_read (which will retry until
1265 it makes no progress, and then return how much was transferred). */
1268 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1270 if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL,
1271 myaddr, memaddr, len) == len)
1277 /* See target/target.h. */
1280 target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
1285 r = target_read_memory (memaddr, buf, sizeof buf);
1288 *result = extract_unsigned_integer (buf, sizeof buf,
1289 gdbarch_byte_order (target_gdbarch ()));
1293 /* Like target_read_memory, but specify explicitly that this is a read
1294 from the target's raw memory. That is, this read bypasses the
1295 dcache, breakpoint shadowing, etc. */
1298 target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1300 if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL,
1301 myaddr, memaddr, len) == len)
1307 /* Like target_read_memory, but specify explicitly that this is a read from
1308 the target's stack. This may trigger different cache behavior. */
1311 target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1313 if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL,
1314 myaddr, memaddr, len) == len)
1320 /* Like target_read_memory, but specify explicitly that this is a read from
1321 the target's code. This may trigger different cache behavior. */
1324 target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
1326 if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL,
1327 myaddr, memaddr, len) == len)
1333 /* Write LEN bytes from MYADDR to target memory at address MEMADDR.
1334 Returns either 0 for success or -1 if any error occurs. If an
1335 error occurs, no guarantee is made about how much data got written.
1336 Callers that can deal with partial writes should call
1340 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1342 if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL,
1343 myaddr, memaddr, len) == len)
1349 /* Write LEN bytes from MYADDR to target raw memory at address
1350 MEMADDR. Returns either 0 for success or -1 if any error occurs.
1351 If an error occurs, no guarantee is made about how much data got
1352 written. Callers that can deal with partial writes should call
1356 target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
1358 if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL,
1359 myaddr, memaddr, len) == len)
1365 /* Fetch the target's memory map. */
1367 std::vector<mem_region>
1368 target_memory_map (void)
1370 std::vector<mem_region> result = current_top_target ()->memory_map ();
1371 if (result.empty ())
1374 std::sort (result.begin (), result.end ());
1376 /* Check that regions do not overlap. Simultaneously assign
1377 a numbering for the "mem" commands to use to refer to
1379 mem_region *last_one = NULL;
1380 for (size_t ix = 0; ix < result.size (); ix++)
1382 mem_region *this_one = &result[ix];
1383 this_one->number = ix;
1385 if (last_one != NULL && last_one->hi > this_one->lo)
1387 warning (_("Overlapping regions in memory map: ignoring"));
1388 return std::vector<mem_region> ();
1391 last_one = this_one;
1398 target_flash_erase (ULONGEST address, LONGEST length)
1400 current_top_target ()->flash_erase (address, length);
1404 target_flash_done (void)
1406 current_top_target ()->flash_done ();
1410 show_trust_readonly (struct ui_file *file, int from_tty,
1411 struct cmd_list_element *c, const char *value)
1413 fprintf_filtered (file,
1414 _("Mode for reading from readonly sections is %s.\n"),
1418 /* Target vector read/write partial wrapper functions. */
1420 static enum target_xfer_status
1421 target_read_partial (struct target_ops *ops,
1422 enum target_object object,
1423 const char *annex, gdb_byte *buf,
1424 ULONGEST offset, ULONGEST len,
1425 ULONGEST *xfered_len)
1427 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len,
1431 static enum target_xfer_status
1432 target_write_partial (struct target_ops *ops,
1433 enum target_object object,
1434 const char *annex, const gdb_byte *buf,
1435 ULONGEST offset, LONGEST len, ULONGEST *xfered_len)
1437 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len,
1441 /* Wrappers to perform the full transfer. */
1443 /* For docs on target_read see target.h. */
1446 target_read (struct target_ops *ops,
1447 enum target_object object,
1448 const char *annex, gdb_byte *buf,
1449 ULONGEST offset, LONGEST len)
1451 LONGEST xfered_total = 0;
1454 /* If we are reading from a memory object, find the length of an addressable
1455 unit for that architecture. */
1456 if (object == TARGET_OBJECT_MEMORY
1457 || object == TARGET_OBJECT_STACK_MEMORY
1458 || object == TARGET_OBJECT_CODE_MEMORY
1459 || object == TARGET_OBJECT_RAW_MEMORY)
1460 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1462 while (xfered_total < len)
1464 ULONGEST xfered_partial;
1465 enum target_xfer_status status;
1467 status = target_read_partial (ops, object, annex,
1468 buf + xfered_total * unit_size,
1469 offset + xfered_total, len - xfered_total,
1472 /* Call an observer, notifying them of the xfer progress? */
1473 if (status == TARGET_XFER_EOF)
1474 return xfered_total;
1475 else if (status == TARGET_XFER_OK)
1477 xfered_total += xfered_partial;
1481 return TARGET_XFER_E_IO;
1487 /* Assuming that the entire [begin, end) range of memory cannot be
1488 read, try to read whatever subrange is possible to read.
1490 The function returns, in RESULT, either zero or one memory block.
1491 If there's a readable subrange at the beginning, it is completely
1492 read and returned. Any further readable subrange will not be read.
1493 Otherwise, if there's a readable subrange at the end, it will be
1494 completely read and returned. Any readable subranges before it
1495 (obviously, not starting at the beginning), will be ignored. In
1496 other cases -- either no readable subrange, or readable subrange(s)
1497 that is neither at the beginning, or end, nothing is returned.
1499 The purpose of this function is to handle a read across a boundary
1500 of accessible memory in a case when memory map is not available.
1501 The above restrictions are fine for this case, but will give
1502 incorrect results if the memory is 'patchy'. However, supporting
1503 'patchy' memory would require trying to read every single byte,
1504 and it seems unacceptable solution. Explicit memory map is
1505 recommended for this case -- and target_read_memory_robust will
1506 take care of reading multiple ranges then. */
1509 read_whatever_is_readable (struct target_ops *ops,
1510 const ULONGEST begin, const ULONGEST end,
1512 std::vector<memory_read_result> *result)
1514 ULONGEST current_begin = begin;
1515 ULONGEST current_end = end;
1517 ULONGEST xfered_len;
1519 /* If we previously failed to read 1 byte, nothing can be done here. */
1520 if (end - begin <= 1)
1523 gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin));
1525 /* Check that either first or the last byte is readable, and give up
1526 if not. This heuristic is meant to permit reading accessible memory
1527 at the boundary of accessible region. */
1528 if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1529 buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK)
1534 else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL,
1535 buf.get () + (end - begin) - 1, end - 1, 1,
1536 &xfered_len) == TARGET_XFER_OK)
1544 /* Loop invariant is that the [current_begin, current_end) was previously
1545 found to be not readable as a whole.
1547 Note loop condition -- if the range has 1 byte, we can't divide the range
1548 so there's no point trying further. */
1549 while (current_end - current_begin > 1)
1551 ULONGEST first_half_begin, first_half_end;
1552 ULONGEST second_half_begin, second_half_end;
1554 ULONGEST middle = current_begin + (current_end - current_begin) / 2;
1558 first_half_begin = current_begin;
1559 first_half_end = middle;
1560 second_half_begin = middle;
1561 second_half_end = current_end;
1565 first_half_begin = middle;
1566 first_half_end = current_end;
1567 second_half_begin = current_begin;
1568 second_half_end = middle;
1571 xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL,
1572 buf.get () + (first_half_begin - begin) * unit_size,
1574 first_half_end - first_half_begin);
1576 if (xfer == first_half_end - first_half_begin)
1578 /* This half reads up fine. So, the error must be in the
1580 current_begin = second_half_begin;
1581 current_end = second_half_end;
1585 /* This half is not readable. Because we've tried one byte, we
1586 know some part of this half if actually readable. Go to the next
1587 iteration to divide again and try to read.
1589 We don't handle the other half, because this function only tries
1590 to read a single readable subrange. */
1591 current_begin = first_half_begin;
1592 current_end = first_half_end;
1598 /* The [begin, current_begin) range has been read. */
1599 result->emplace_back (begin, current_end, std::move (buf));
1603 /* The [current_end, end) range has been read. */
1604 LONGEST region_len = end - current_end;
1606 gdb::unique_xmalloc_ptr<gdb_byte> data
1607 ((gdb_byte *) xmalloc (region_len * unit_size));
1608 memcpy (data.get (), buf.get () + (current_end - begin) * unit_size,
1609 region_len * unit_size);
1610 result->emplace_back (current_end, end, std::move (data));
1614 std::vector<memory_read_result>
1615 read_memory_robust (struct target_ops *ops,
1616 const ULONGEST offset, const LONGEST len)
1618 std::vector<memory_read_result> result;
1619 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1621 LONGEST xfered_total = 0;
1622 while (xfered_total < len)
1624 struct mem_region *region = lookup_mem_region (offset + xfered_total);
1627 /* If there is no explicit region, a fake one should be created. */
1628 gdb_assert (region);
1630 if (region->hi == 0)
1631 region_len = len - xfered_total;
1633 region_len = region->hi - offset;
1635 if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO)
1637 /* Cannot read this region. Note that we can end up here only
1638 if the region is explicitly marked inaccessible, or
1639 'inaccessible-by-default' is in effect. */
1640 xfered_total += region_len;
1644 LONGEST to_read = std::min (len - xfered_total, region_len);
1645 gdb::unique_xmalloc_ptr<gdb_byte> buffer
1646 ((gdb_byte *) xmalloc (to_read * unit_size));
1648 LONGEST xfered_partial =
1649 target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (),
1650 offset + xfered_total, to_read);
1651 /* Call an observer, notifying them of the xfer progress? */
1652 if (xfered_partial <= 0)
1654 /* Got an error reading full chunk. See if maybe we can read
1656 read_whatever_is_readable (ops, offset + xfered_total,
1657 offset + xfered_total + to_read,
1658 unit_size, &result);
1659 xfered_total += to_read;
1663 result.emplace_back (offset + xfered_total,
1664 offset + xfered_total + xfered_partial,
1665 std::move (buffer));
1666 xfered_total += xfered_partial;
1676 /* An alternative to target_write with progress callbacks. */
1679 target_write_with_progress (struct target_ops *ops,
1680 enum target_object object,
1681 const char *annex, const gdb_byte *buf,
1682 ULONGEST offset, LONGEST len,
1683 void (*progress) (ULONGEST, void *), void *baton)
1685 LONGEST xfered_total = 0;
1688 /* If we are writing to a memory object, find the length of an addressable
1689 unit for that architecture. */
1690 if (object == TARGET_OBJECT_MEMORY
1691 || object == TARGET_OBJECT_STACK_MEMORY
1692 || object == TARGET_OBJECT_CODE_MEMORY
1693 || object == TARGET_OBJECT_RAW_MEMORY)
1694 unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
1696 /* Give the progress callback a chance to set up. */
1698 (*progress) (0, baton);
1700 while (xfered_total < len)
1702 ULONGEST xfered_partial;
1703 enum target_xfer_status status;
1705 status = target_write_partial (ops, object, annex,
1706 buf + xfered_total * unit_size,
1707 offset + xfered_total, len - xfered_total,
1710 if (status != TARGET_XFER_OK)
1711 return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO;
1714 (*progress) (xfered_partial, baton);
1716 xfered_total += xfered_partial;
1722 /* For docs on target_write see target.h. */
1725 target_write (struct target_ops *ops,
1726 enum target_object object,
1727 const char *annex, const gdb_byte *buf,
1728 ULONGEST offset, LONGEST len)
1730 return target_write_with_progress (ops, object, annex, buf, offset, len,
1734 /* Help for target_read_alloc and target_read_stralloc. See their comments
1737 template <typename T>
1738 gdb::optional<gdb::def_vector<T>>
1739 target_read_alloc_1 (struct target_ops *ops, enum target_object object,
1742 gdb::def_vector<T> buf;
1744 const int chunk = 4096;
1746 /* This function does not have a length parameter; it reads the
1747 entire OBJECT). Also, it doesn't support objects fetched partly
1748 from one target and partly from another (in a different stratum,
1749 e.g. a core file and an executable). Both reasons make it
1750 unsuitable for reading memory. */
1751 gdb_assert (object != TARGET_OBJECT_MEMORY);
1753 /* Start by reading up to 4K at a time. The target will throttle
1754 this number down if necessary. */
1757 ULONGEST xfered_len;
1758 enum target_xfer_status status;
1760 buf.resize (buf_pos + chunk);
1762 status = target_read_partial (ops, object, annex,
1763 (gdb_byte *) &buf[buf_pos],
1767 if (status == TARGET_XFER_EOF)
1769 /* Read all there was. */
1770 buf.resize (buf_pos);
1773 else if (status != TARGET_XFER_OK)
1775 /* An error occurred. */
1779 buf_pos += xfered_len;
1787 gdb::optional<gdb::byte_vector>
1788 target_read_alloc (struct target_ops *ops, enum target_object object,
1791 return target_read_alloc_1<gdb_byte> (ops, object, annex);
1796 gdb::optional<gdb::char_vector>
1797 target_read_stralloc (struct target_ops *ops, enum target_object object,
1800 gdb::optional<gdb::char_vector> buf
1801 = target_read_alloc_1<char> (ops, object, annex);
1806 if (buf->empty () || buf->back () != '\0')
1807 buf->push_back ('\0');
1809 /* Check for embedded NUL bytes; but allow trailing NULs. */
1810 for (auto it = std::find (buf->begin (), buf->end (), '\0');
1811 it != buf->end (); it++)
1814 warning (_("target object %d, annex %s, "
1815 "contained unexpected null characters"),
1816 (int) object, annex ? annex : "(none)");
1823 /* Memory transfer methods. */
1826 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1829 /* This method is used to read from an alternate, non-current
1830 target. This read must bypass the overlay support (as symbols
1831 don't match this target), and GDB's internal cache (wrong cache
1832 for this target). */
1833 if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len)
1835 memory_error (TARGET_XFER_E_IO, addr);
1839 get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr,
1840 int len, enum bfd_endian byte_order)
1842 gdb_byte buf[sizeof (ULONGEST)];
1844 gdb_assert (len <= sizeof (buf));
1845 get_target_memory (ops, addr, buf, len);
1846 return extract_unsigned_integer (buf, len, byte_order);
1852 target_insert_breakpoint (struct gdbarch *gdbarch,
1853 struct bp_target_info *bp_tgt)
1855 if (!may_insert_breakpoints)
1857 warning (_("May not insert breakpoints"));
1861 return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt);
1867 target_remove_breakpoint (struct gdbarch *gdbarch,
1868 struct bp_target_info *bp_tgt,
1869 enum remove_bp_reason reason)
1871 /* This is kind of a weird case to handle, but the permission might
1872 have been changed after breakpoints were inserted - in which case
1873 we should just take the user literally and assume that any
1874 breakpoints should be left in place. */
1875 if (!may_insert_breakpoints)
1877 warning (_("May not remove breakpoints"));
1881 return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason);
1885 info_target_command (const char *args, int from_tty)
1887 int has_all_mem = 0;
1889 if (symfile_objfile != NULL)
1890 printf_unfiltered (_("Symbols from \"%s\".\n"),
1891 objfile_name (symfile_objfile));
1893 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
1895 if (!t->has_memory ())
1898 if ((int) (t->stratum ()) <= (int) dummy_stratum)
1901 printf_unfiltered (_("\tWhile running this, "
1902 "GDB does not access memory from...\n"));
1903 printf_unfiltered ("%s:\n", t->longname ());
1905 has_all_mem = t->has_all_memory ();
1909 /* This function is called before any new inferior is created, e.g.
1910 by running a program, attaching, or connecting to a target.
1911 It cleans up any state from previous invocations which might
1912 change between runs. This is a subset of what target_preopen
1913 resets (things which might change between targets). */
1916 target_pre_inferior (int from_tty)
1918 /* Clear out solib state. Otherwise the solib state of the previous
1919 inferior might have survived and is entirely wrong for the new
1920 target. This has been observed on GNU/Linux using glibc 2.3. How
1932 Cannot access memory at address 0xdeadbeef
1935 /* In some OSs, the shared library list is the same/global/shared
1936 across inferiors. If code is shared between processes, so are
1937 memory regions and features. */
1938 if (!gdbarch_has_global_solist (target_gdbarch ()))
1940 no_shared_libraries (NULL, from_tty);
1942 invalidate_target_mem_regions ();
1944 target_clear_description ();
1947 /* attach_flag may be set if the previous process associated with
1948 the inferior was attached to. */
1949 current_inferior ()->attach_flag = 0;
1951 current_inferior ()->highest_thread_num = 0;
1953 agent_capability_invalidate ();
1956 /* Callback for iterate_over_inferiors. Gets rid of the given
1960 dispose_inferior (struct inferior *inf, void *args)
1962 /* Not all killed inferiors can, or will ever be, removed from the
1963 inferior list. Killed inferiors clearly don't need to be killed
1964 again, so, we're done. */
1968 thread_info *thread = any_thread_of_inferior (inf);
1971 switch_to_thread (thread);
1973 /* Core inferiors actually should be detached, not killed. */
1974 if (target_has_execution)
1977 target_detach (inf, 0);
1983 /* This is to be called by the open routine before it does
1987 target_preopen (int from_tty)
1991 if (have_inferiors ())
1994 || !have_live_inferiors ()
1995 || query (_("A program is being debugged already. Kill it? ")))
1996 iterate_over_inferiors (dispose_inferior, NULL);
1998 error (_("Program not killed."));
2001 /* Calling target_kill may remove the target from the stack. But if
2002 it doesn't (which seems like a win for UDI), remove it now. */
2003 /* Leave the exec target, though. The user may be switching from a
2004 live process to a core of the same program. */
2005 pop_all_targets_above (file_stratum);
2007 target_pre_inferior (from_tty);
2013 target_detach (inferior *inf, int from_tty)
2015 /* After we have detached, we will clear the register cache for this inferior
2016 by calling registers_changed_ptid. We must save the pid_ptid before
2017 detaching, as the target detach method will clear inf->pid. */
2018 ptid_t save_pid_ptid = ptid_t (inf->pid);
2020 /* As long as some to_detach implementations rely on the current_inferior
2021 (either directly, or indirectly, like through target_gdbarch or by
2022 reading memory), INF needs to be the current inferior. When that
2023 requirement will become no longer true, then we can remove this
2025 gdb_assert (inf == current_inferior ());
2027 if (gdbarch_has_global_breakpoints (target_gdbarch ()))
2028 /* Don't remove global breakpoints here. They're removed on
2029 disconnection from the target. */
2032 /* If we're in breakpoints-always-inserted mode, have to remove
2033 breakpoints before detaching. */
2034 remove_breakpoints_inf (current_inferior ());
2036 prepare_for_detach ();
2038 current_top_target ()->detach (inf, from_tty);
2040 registers_changed_ptid (save_pid_ptid);
2042 /* We have to ensure we have no frame cache left. Normally,
2043 registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when
2044 inferior_ptid matches save_pid_ptid, but in our case, it does not
2045 call it, as inferior_ptid has been reset. */
2046 reinit_frame_cache ();
2050 target_disconnect (const char *args, int from_tty)
2052 /* If we're in breakpoints-always-inserted mode or if breakpoints
2053 are global across processes, we have to remove them before
2055 remove_breakpoints ();
2057 current_top_target ()->disconnect (args, from_tty);
2060 /* See target/target.h. */
2063 target_wait (ptid_t ptid, struct target_waitstatus *status, int options)
2065 return current_top_target ()->wait (ptid, status, options);
2071 default_target_wait (struct target_ops *ops,
2072 ptid_t ptid, struct target_waitstatus *status,
2075 status->kind = TARGET_WAITKIND_IGNORE;
2076 return minus_one_ptid;
2080 target_pid_to_str (ptid_t ptid)
2082 return current_top_target ()->pid_to_str (ptid);
2086 target_thread_name (struct thread_info *info)
2088 return current_top_target ()->thread_name (info);
2091 struct thread_info *
2092 target_thread_handle_to_thread_info (const gdb_byte *thread_handle,
2094 struct inferior *inf)
2096 return current_top_target ()->thread_handle_to_thread_info (thread_handle,
2103 target_thread_info_to_thread_handle (struct thread_info *tip)
2105 return current_top_target ()->thread_info_to_thread_handle (tip);
2109 target_resume (ptid_t ptid, int step, enum gdb_signal signal)
2111 target_dcache_invalidate ();
2113 current_top_target ()->resume (ptid, step, signal);
2115 registers_changed_ptid (ptid);
2116 /* We only set the internal executing state here. The user/frontend
2117 running state is set at a higher level. This also clears the
2118 thread's stop_pc as side effect. */
2119 set_executing (ptid, 1);
2120 clear_inline_frame_state (ptid);
2123 /* If true, target_commit_resume is a nop. */
2124 static int defer_target_commit_resume;
2129 target_commit_resume (void)
2131 if (defer_target_commit_resume)
2134 current_top_target ()->commit_resume ();
2139 scoped_restore_tmpl<int>
2140 make_scoped_defer_target_commit_resume ()
2142 return make_scoped_restore (&defer_target_commit_resume, 1);
2146 target_pass_signals (gdb::array_view<const unsigned char> pass_signals)
2148 current_top_target ()->pass_signals (pass_signals);
2152 target_program_signals (gdb::array_view<const unsigned char> program_signals)
2154 current_top_target ()->program_signals (program_signals);
2158 default_follow_fork (struct target_ops *self, int follow_child,
2161 /* Some target returned a fork event, but did not know how to follow it. */
2162 internal_error (__FILE__, __LINE__,
2163 _("could not find a target to follow fork"));
2166 /* Look through the list of possible targets for a target that can
2170 target_follow_fork (int follow_child, int detach_fork)
2172 return current_top_target ()->follow_fork (follow_child, detach_fork);
2175 /* Target wrapper for follow exec hook. */
2178 target_follow_exec (struct inferior *inf, const char *execd_pathname)
2180 current_top_target ()->follow_exec (inf, execd_pathname);
2184 default_mourn_inferior (struct target_ops *self)
2186 internal_error (__FILE__, __LINE__,
2187 _("could not find a target to follow mourn inferior"));
2191 target_mourn_inferior (ptid_t ptid)
2193 gdb_assert (ptid == inferior_ptid);
2194 current_top_target ()->mourn_inferior ();
2196 /* We no longer need to keep handles on any of the object files.
2197 Make sure to release them to avoid unnecessarily locking any
2198 of them while we're not actually debugging. */
2199 bfd_cache_close_all ();
2202 /* Look for a target which can describe architectural features, starting
2203 from TARGET. If we find one, return its description. */
2205 const struct target_desc *
2206 target_read_description (struct target_ops *target)
2208 return target->read_description ();
2211 /* This implements a basic search of memory, reading target memory and
2212 performing the search here (as opposed to performing the search in on the
2213 target side with, for example, gdbserver). */
2216 simple_search_memory (struct target_ops *ops,
2217 CORE_ADDR start_addr, ULONGEST search_space_len,
2218 const gdb_byte *pattern, ULONGEST pattern_len,
2219 CORE_ADDR *found_addrp)
2221 /* NOTE: also defined in find.c testcase. */
2222 #define SEARCH_CHUNK_SIZE 16000
2223 const unsigned chunk_size = SEARCH_CHUNK_SIZE;
2224 /* Buffer to hold memory contents for searching. */
2225 unsigned search_buf_size;
2227 search_buf_size = chunk_size + pattern_len - 1;
2229 /* No point in trying to allocate a buffer larger than the search space. */
2230 if (search_space_len < search_buf_size)
2231 search_buf_size = search_space_len;
2233 gdb::byte_vector search_buf (search_buf_size);
2235 /* Prime the search buffer. */
2237 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2238 search_buf.data (), start_addr, search_buf_size)
2241 warning (_("Unable to access %s bytes of target "
2242 "memory at %s, halting search."),
2243 pulongest (search_buf_size), hex_string (start_addr));
2247 /* Perform the search.
2249 The loop is kept simple by allocating [N + pattern-length - 1] bytes.
2250 When we've scanned N bytes we copy the trailing bytes to the start and
2251 read in another N bytes. */
2253 while (search_space_len >= pattern_len)
2255 gdb_byte *found_ptr;
2256 unsigned nr_search_bytes
2257 = std::min (search_space_len, (ULONGEST) search_buf_size);
2259 found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes,
2260 pattern, pattern_len);
2262 if (found_ptr != NULL)
2264 CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ());
2266 *found_addrp = found_addr;
2270 /* Not found in this chunk, skip to next chunk. */
2272 /* Don't let search_space_len wrap here, it's unsigned. */
2273 if (search_space_len >= chunk_size)
2274 search_space_len -= chunk_size;
2276 search_space_len = 0;
2278 if (search_space_len >= pattern_len)
2280 unsigned keep_len = search_buf_size - chunk_size;
2281 CORE_ADDR read_addr = start_addr + chunk_size + keep_len;
2284 /* Copy the trailing part of the previous iteration to the front
2285 of the buffer for the next iteration. */
2286 gdb_assert (keep_len == pattern_len - 1);
2287 memcpy (&search_buf[0], &search_buf[chunk_size], keep_len);
2289 nr_to_read = std::min (search_space_len - keep_len,
2290 (ULONGEST) chunk_size);
2292 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL,
2293 &search_buf[keep_len], read_addr,
2294 nr_to_read) != nr_to_read)
2296 warning (_("Unable to access %s bytes of target "
2297 "memory at %s, halting search."),
2298 plongest (nr_to_read),
2299 hex_string (read_addr));
2303 start_addr += chunk_size;
2312 /* Default implementation of memory-searching. */
2315 default_search_memory (struct target_ops *self,
2316 CORE_ADDR start_addr, ULONGEST search_space_len,
2317 const gdb_byte *pattern, ULONGEST pattern_len,
2318 CORE_ADDR *found_addrp)
2320 /* Start over from the top of the target stack. */
2321 return simple_search_memory (current_top_target (),
2322 start_addr, search_space_len,
2323 pattern, pattern_len, found_addrp);
2326 /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
2327 sequence of bytes in PATTERN with length PATTERN_LEN.
2329 The result is 1 if found, 0 if not found, and -1 if there was an error
2330 requiring halting of the search (e.g. memory read error).
2331 If the pattern is found the address is recorded in FOUND_ADDRP. */
2334 target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
2335 const gdb_byte *pattern, ULONGEST pattern_len,
2336 CORE_ADDR *found_addrp)
2338 return current_top_target ()->search_memory (start_addr, search_space_len,
2339 pattern, pattern_len, found_addrp);
2342 /* Look through the currently pushed targets. If none of them will
2343 be able to restart the currently running process, issue an error
2347 target_require_runnable (void)
2349 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2351 /* If this target knows how to create a new program, then
2352 assume we will still be able to after killing the current
2353 one. Either killing and mourning will not pop T, or else
2354 find_default_run_target will find it again. */
2355 if (t->can_create_inferior ())
2358 /* Do not worry about targets at certain strata that can not
2359 create inferiors. Assume they will be pushed again if
2360 necessary, and continue to the process_stratum. */
2361 if (t->stratum () > process_stratum)
2364 error (_("The \"%s\" target does not support \"run\". "
2365 "Try \"help target\" or \"continue\"."),
2369 /* This function is only called if the target is running. In that
2370 case there should have been a process_stratum target and it
2371 should either know how to create inferiors, or not... */
2372 internal_error (__FILE__, __LINE__, _("No targets found"));
2375 /* Whether GDB is allowed to fall back to the default run target for
2376 "run", "attach", etc. when no target is connected yet. */
2377 static int auto_connect_native_target = 1;
2380 show_auto_connect_native_target (struct ui_file *file, int from_tty,
2381 struct cmd_list_element *c, const char *value)
2383 fprintf_filtered (file,
2384 _("Whether GDB may automatically connect to the "
2385 "native target is %s.\n"),
2389 /* A pointer to the target that can respond to "run" or "attach".
2390 Native targets are always singletons and instantiated early at GDB
2392 static target_ops *the_native_target;
2397 set_native_target (target_ops *target)
2399 if (the_native_target != NULL)
2400 internal_error (__FILE__, __LINE__,
2401 _("native target already set (\"%s\")."),
2402 the_native_target->longname ());
2404 the_native_target = target;
2410 get_native_target ()
2412 return the_native_target;
2415 /* Look through the list of possible targets for a target that can
2416 execute a run or attach command without any other data. This is
2417 used to locate the default process stratum.
2419 If DO_MESG is not NULL, the result is always valid (error() is
2420 called for errors); else, return NULL on error. */
2422 static struct target_ops *
2423 find_default_run_target (const char *do_mesg)
2425 if (auto_connect_native_target && the_native_target != NULL)
2426 return the_native_target;
2428 if (do_mesg != NULL)
2429 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
2436 find_attach_target (void)
2438 /* If a target on the current stack can attach, use it. */
2439 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2441 if (t->can_attach ())
2445 /* Otherwise, use the default run target for attaching. */
2446 return find_default_run_target ("attach");
2452 find_run_target (void)
2454 /* If a target on the current stack can run, use it. */
2455 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2457 if (t->can_create_inferior ())
2461 /* Otherwise, use the default run target. */
2462 return find_default_run_target ("run");
2466 target_ops::info_proc (const char *args, enum info_proc_what what)
2471 /* Implement the "info proc" command. */
2474 target_info_proc (const char *args, enum info_proc_what what)
2476 struct target_ops *t;
2478 /* If we're already connected to something that can get us OS
2479 related data, use it. Otherwise, try using the native
2481 t = find_target_at (process_stratum);
2483 t = find_default_run_target (NULL);
2485 for (; t != NULL; t = t->beneath ())
2487 if (t->info_proc (args, what))
2490 fprintf_unfiltered (gdb_stdlog,
2491 "target_info_proc (\"%s\", %d)\n", args, what);
2501 find_default_supports_disable_randomization (struct target_ops *self)
2503 struct target_ops *t;
2505 t = find_default_run_target (NULL);
2507 return t->supports_disable_randomization ();
2512 target_supports_disable_randomization (void)
2514 return current_top_target ()->supports_disable_randomization ();
2517 /* See target/target.h. */
2520 target_supports_multi_process (void)
2522 return current_top_target ()->supports_multi_process ();
2527 gdb::optional<gdb::char_vector>
2528 target_get_osdata (const char *type)
2530 struct target_ops *t;
2532 /* If we're already connected to something that can get us OS
2533 related data, use it. Otherwise, try using the native
2535 t = find_target_at (process_stratum);
2537 t = find_default_run_target ("get OS data");
2542 return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type);
2546 /* Determine the current address space of thread PTID. */
2548 struct address_space *
2549 target_thread_address_space (ptid_t ptid)
2551 struct address_space *aspace;
2553 aspace = current_top_target ()->thread_address_space (ptid);
2554 gdb_assert (aspace != NULL);
2562 target_ops::beneath () const
2564 return g_target_stack.find_beneath (this);
2568 target_ops::close ()
2573 target_ops::can_attach ()
2579 target_ops::attach (const char *, int)
2581 gdb_assert_not_reached ("target_ops::attach called");
2585 target_ops::can_create_inferior ()
2591 target_ops::create_inferior (const char *, const std::string &,
2594 gdb_assert_not_reached ("target_ops::create_inferior called");
2598 target_ops::can_run ()
2606 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
2615 /* Target file operations. */
2617 static struct target_ops *
2618 default_fileio_target (void)
2620 struct target_ops *t;
2622 /* If we're already connected to something that can perform
2623 file I/O, use it. Otherwise, try using the native target. */
2624 t = find_target_at (process_stratum);
2627 return find_default_run_target ("file I/O");
2630 /* File handle for target file operations. */
2634 /* The target on which this file is open. NULL if the target is
2635 meanwhile closed while the handle is open. */
2638 /* The file descriptor on the target. */
2641 /* Check whether this fileio_fh_t represents a closed file. */
2644 return target_fd < 0;
2648 /* Vector of currently open file handles. The value returned by
2649 target_fileio_open and passed as the FD argument to other
2650 target_fileio_* functions is an index into this vector. This
2651 vector's entries are never freed; instead, files are marked as
2652 closed, and the handle becomes available for reuse. */
2653 static std::vector<fileio_fh_t> fileio_fhandles;
2655 /* Index into fileio_fhandles of the lowest handle that might be
2656 closed. This permits handle reuse without searching the whole
2657 list each time a new file is opened. */
2658 static int lowest_closed_fd;
2660 /* Invalidate the target associated with open handles that were open
2661 on target TARG, since we're about to close (and maybe destroy) the
2662 target. The handles remain open from the client's perspective, but
2663 trying to do anything with them other than closing them will fail
2667 fileio_handles_invalidate_target (target_ops *targ)
2669 for (fileio_fh_t &fh : fileio_fhandles)
2670 if (fh.target == targ)
2674 /* Acquire a target fileio file descriptor. */
2677 acquire_fileio_fd (target_ops *target, int target_fd)
2679 /* Search for closed handles to reuse. */
2680 for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++)
2682 fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd];
2684 if (fh.is_closed ())
2688 /* Push a new handle if no closed handles were found. */
2689 if (lowest_closed_fd == fileio_fhandles.size ())
2690 fileio_fhandles.push_back (fileio_fh_t {target, target_fd});
2692 fileio_fhandles[lowest_closed_fd] = {target, target_fd};
2694 /* Should no longer be marked closed. */
2695 gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ());
2697 /* Return its index, and start the next lookup at
2699 return lowest_closed_fd++;
2702 /* Release a target fileio file descriptor. */
2705 release_fileio_fd (int fd, fileio_fh_t *fh)
2708 lowest_closed_fd = std::min (lowest_closed_fd, fd);
2711 /* Return a pointer to the fileio_fhandle_t corresponding to FD. */
2713 static fileio_fh_t *
2714 fileio_fd_to_fh (int fd)
2716 return &fileio_fhandles[fd];
2720 /* Default implementations of file i/o methods. We don't want these
2721 to delegate automatically, because we need to know which target
2722 supported the method, in order to call it directly from within
2723 pread/pwrite, etc. */
2726 target_ops::fileio_open (struct inferior *inf, const char *filename,
2727 int flags, int mode, int warn_if_slow,
2730 *target_errno = FILEIO_ENOSYS;
2735 target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2736 ULONGEST offset, int *target_errno)
2738 *target_errno = FILEIO_ENOSYS;
2743 target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len,
2744 ULONGEST offset, int *target_errno)
2746 *target_errno = FILEIO_ENOSYS;
2751 target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno)
2753 *target_errno = FILEIO_ENOSYS;
2758 target_ops::fileio_close (int fd, int *target_errno)
2760 *target_errno = FILEIO_ENOSYS;
2765 target_ops::fileio_unlink (struct inferior *inf, const char *filename,
2768 *target_errno = FILEIO_ENOSYS;
2772 gdb::optional<std::string>
2773 target_ops::fileio_readlink (struct inferior *inf, const char *filename,
2776 *target_errno = FILEIO_ENOSYS;
2780 /* Helper for target_fileio_open and
2781 target_fileio_open_warn_if_slow. */
2784 target_fileio_open_1 (struct inferior *inf, const char *filename,
2785 int flags, int mode, int warn_if_slow,
2788 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2790 int fd = t->fileio_open (inf, filename, flags, mode,
2791 warn_if_slow, target_errno);
2793 if (fd == -1 && *target_errno == FILEIO_ENOSYS)
2799 fd = acquire_fileio_fd (t, fd);
2802 fprintf_unfiltered (gdb_stdlog,
2803 "target_fileio_open (%d,%s,0x%x,0%o,%d)"
2805 inf == NULL ? 0 : inf->num,
2806 filename, flags, mode,
2808 fd != -1 ? 0 : *target_errno);
2812 *target_errno = FILEIO_ENOSYS;
2819 target_fileio_open (struct inferior *inf, const char *filename,
2820 int flags, int mode, int *target_errno)
2822 return target_fileio_open_1 (inf, filename, flags, mode, 0,
2829 target_fileio_open_warn_if_slow (struct inferior *inf,
2830 const char *filename,
2831 int flags, int mode, int *target_errno)
2833 return target_fileio_open_1 (inf, filename, flags, mode, 1,
2840 target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
2841 ULONGEST offset, int *target_errno)
2843 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2846 if (fh->is_closed ())
2847 *target_errno = EBADF;
2848 else if (fh->target == NULL)
2849 *target_errno = EIO;
2851 ret = fh->target->fileio_pwrite (fh->target_fd, write_buf,
2852 len, offset, target_errno);
2855 fprintf_unfiltered (gdb_stdlog,
2856 "target_fileio_pwrite (%d,...,%d,%s) "
2858 fd, len, pulongest (offset),
2859 ret, ret != -1 ? 0 : *target_errno);
2866 target_fileio_pread (int fd, gdb_byte *read_buf, int len,
2867 ULONGEST offset, int *target_errno)
2869 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2872 if (fh->is_closed ())
2873 *target_errno = EBADF;
2874 else if (fh->target == NULL)
2875 *target_errno = EIO;
2877 ret = fh->target->fileio_pread (fh->target_fd, read_buf,
2878 len, offset, target_errno);
2881 fprintf_unfiltered (gdb_stdlog,
2882 "target_fileio_pread (%d,...,%d,%s) "
2884 fd, len, pulongest (offset),
2885 ret, ret != -1 ? 0 : *target_errno);
2892 target_fileio_fstat (int fd, struct stat *sb, int *target_errno)
2894 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2897 if (fh->is_closed ())
2898 *target_errno = EBADF;
2899 else if (fh->target == NULL)
2900 *target_errno = EIO;
2902 ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno);
2905 fprintf_unfiltered (gdb_stdlog,
2906 "target_fileio_fstat (%d) = %d (%d)\n",
2907 fd, ret, ret != -1 ? 0 : *target_errno);
2914 target_fileio_close (int fd, int *target_errno)
2916 fileio_fh_t *fh = fileio_fd_to_fh (fd);
2919 if (fh->is_closed ())
2920 *target_errno = EBADF;
2923 if (fh->target != NULL)
2924 ret = fh->target->fileio_close (fh->target_fd,
2928 release_fileio_fd (fd, fh);
2932 fprintf_unfiltered (gdb_stdlog,
2933 "target_fileio_close (%d) = %d (%d)\n",
2934 fd, ret, ret != -1 ? 0 : *target_errno);
2941 target_fileio_unlink (struct inferior *inf, const char *filename,
2944 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2946 int ret = t->fileio_unlink (inf, filename, target_errno);
2948 if (ret == -1 && *target_errno == FILEIO_ENOSYS)
2952 fprintf_unfiltered (gdb_stdlog,
2953 "target_fileio_unlink (%d,%s)"
2955 inf == NULL ? 0 : inf->num, filename,
2956 ret, ret != -1 ? 0 : *target_errno);
2960 *target_errno = FILEIO_ENOSYS;
2966 gdb::optional<std::string>
2967 target_fileio_readlink (struct inferior *inf, const char *filename,
2970 for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ())
2972 gdb::optional<std::string> ret
2973 = t->fileio_readlink (inf, filename, target_errno);
2975 if (!ret.has_value () && *target_errno == FILEIO_ENOSYS)
2979 fprintf_unfiltered (gdb_stdlog,
2980 "target_fileio_readlink (%d,%s)"
2982 inf == NULL ? 0 : inf->num,
2983 filename, ret ? ret->c_str () : "(nil)",
2984 ret ? 0 : *target_errno);
2988 *target_errno = FILEIO_ENOSYS;
2992 /* Like scoped_fd, but specific to target fileio. */
2994 class scoped_target_fd
2997 explicit scoped_target_fd (int fd) noexcept
3002 ~scoped_target_fd ()
3008 target_fileio_close (m_fd, &target_errno);
3012 DISABLE_COPY_AND_ASSIGN (scoped_target_fd);
3014 int get () const noexcept
3023 /* Read target file FILENAME, in the filesystem as seen by INF. If
3024 INF is NULL, use the filesystem seen by the debugger (GDB or, for
3025 remote targets, the remote stub). Store the result in *BUF_P and
3026 return the size of the transferred data. PADDING additional bytes
3027 are available in *BUF_P. This is a helper function for
3028 target_fileio_read_alloc; see the declaration of that function for
3029 more information. */
3032 target_fileio_read_alloc_1 (struct inferior *inf, const char *filename,
3033 gdb_byte **buf_p, int padding)
3035 size_t buf_alloc, buf_pos;
3040 scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY,
3041 0700, &target_errno));
3042 if (fd.get () == -1)
3045 /* Start by reading up to 4K at a time. The target will throttle
3046 this number down if necessary. */
3048 buf = (gdb_byte *) xmalloc (buf_alloc);
3052 n = target_fileio_pread (fd.get (), &buf[buf_pos],
3053 buf_alloc - buf_pos - padding, buf_pos,
3057 /* An error occurred. */
3063 /* Read all there was. */
3073 /* If the buffer is filling up, expand it. */
3074 if (buf_alloc < buf_pos * 2)
3077 buf = (gdb_byte *) xrealloc (buf, buf_alloc);
3087 target_fileio_read_alloc (struct inferior *inf, const char *filename,
3090 return target_fileio_read_alloc_1 (inf, filename, buf_p, 0);
3095 gdb::unique_xmalloc_ptr<char>
3096 target_fileio_read_stralloc (struct inferior *inf, const char *filename)
3100 LONGEST i, transferred;
3102 transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1);
3103 bufstr = (char *) buffer;
3105 if (transferred < 0)
3106 return gdb::unique_xmalloc_ptr<char> (nullptr);
3108 if (transferred == 0)
3109 return make_unique_xstrdup ("");
3111 bufstr[transferred] = 0;
3113 /* Check for embedded NUL bytes; but allow trailing NULs. */
3114 for (i = strlen (bufstr); i < transferred; i++)
3117 warning (_("target file %s "
3118 "contained unexpected null characters"),
3123 return gdb::unique_xmalloc_ptr<char> (bufstr);
3128 default_region_ok_for_hw_watchpoint (struct target_ops *self,
3129 CORE_ADDR addr, int len)
3131 return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT);
3135 default_watchpoint_addr_within_range (struct target_ops *target,
3137 CORE_ADDR start, int length)
3139 return addr >= start && addr < start + length;
3145 target_stack::find_beneath (const target_ops *t) const
3147 /* Look for a non-empty slot at stratum levels beneath T's. */
3148 for (int stratum = t->stratum () - 1; stratum >= 0; --stratum)
3149 if (m_stack[stratum] != NULL)
3150 return m_stack[stratum];
3158 find_target_at (enum strata stratum)
3160 return g_target_stack.at (stratum);
3168 target_announce_detach (int from_tty)
3171 const char *exec_file;
3176 exec_file = get_exec_file (0);
3177 if (exec_file == NULL)
3180 pid = inferior_ptid.pid ();
3181 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file,
3182 target_pid_to_str (ptid_t (pid)).c_str ());
3185 /* The inferior process has died. Long live the inferior! */
3188 generic_mourn_inferior (void)
3190 inferior *inf = current_inferior ();
3192 inferior_ptid = null_ptid;
3194 /* Mark breakpoints uninserted in case something tries to delete a
3195 breakpoint while we delete the inferior's threads (which would
3196 fail, since the inferior is long gone). */
3197 mark_breakpoints_out ();
3200 exit_inferior (inf);
3202 /* Note this wipes step-resume breakpoints, so needs to be done
3203 after exit_inferior, which ends up referencing the step-resume
3204 breakpoints through clear_thread_inferior_resources. */
3205 breakpoint_init_inferior (inf_exited);
3207 registers_changed ();
3209 reopen_exec_file ();
3210 reinit_frame_cache ();
3212 if (deprecated_detach_hook)
3213 deprecated_detach_hook ();
3216 /* Convert a normal process ID to a string. Returns the string in a
3220 normal_pid_to_str (ptid_t ptid)
3222 return string_printf ("process %d", ptid.pid ());
3226 default_pid_to_str (struct target_ops *ops, ptid_t ptid)
3228 return normal_pid_to_str (ptid);
3231 /* Error-catcher for target_find_memory_regions. */
3233 dummy_find_memory_regions (struct target_ops *self,
3234 find_memory_region_ftype ignore1, void *ignore2)
3236 error (_("Command not implemented for this target."));
3240 /* Error-catcher for target_make_corefile_notes. */
3242 dummy_make_corefile_notes (struct target_ops *self,
3243 bfd *ignore1, int *ignore2)
3245 error (_("Command not implemented for this target."));
3249 #include "target-delegates.c"
3251 /* The initial current target, so that there is always a semi-valid
3254 static dummy_target the_dummy_target;
3256 static const target_info dummy_target_info = {
3263 dummy_target::stratum () const
3265 return dummy_stratum;
3269 debug_target::stratum () const
3271 return debug_stratum;
3275 dummy_target::info () const
3277 return dummy_target_info;
3281 debug_target::info () const
3283 return beneath ()->info ();
3289 target_close (struct target_ops *targ)
3291 gdb_assert (!target_is_pushed (targ));
3293 fileio_handles_invalidate_target (targ);
3298 fprintf_unfiltered (gdb_stdlog, "target_close ()\n");
3302 target_thread_alive (ptid_t ptid)
3304 return current_top_target ()->thread_alive (ptid);
3308 target_update_thread_list (void)
3310 current_top_target ()->update_thread_list ();
3314 target_stop (ptid_t ptid)
3318 warning (_("May not interrupt or stop the target, ignoring attempt"));
3322 current_top_target ()->stop (ptid);
3330 warning (_("May not interrupt or stop the target, ignoring attempt"));
3334 current_top_target ()->interrupt ();
3340 target_pass_ctrlc (void)
3342 current_top_target ()->pass_ctrlc ();
3348 default_target_pass_ctrlc (struct target_ops *ops)
3350 target_interrupt ();
3353 /* See target/target.h. */
3356 target_stop_and_wait (ptid_t ptid)
3358 struct target_waitstatus status;
3359 int was_non_stop = non_stop;
3364 memset (&status, 0, sizeof (status));
3365 target_wait (ptid, &status, 0);
3367 non_stop = was_non_stop;
3370 /* See target/target.h. */
3373 target_continue_no_signal (ptid_t ptid)
3375 target_resume (ptid, 0, GDB_SIGNAL_0);
3378 /* See target/target.h. */
3381 target_continue (ptid_t ptid, enum gdb_signal signal)
3383 target_resume (ptid, 0, signal);
3386 /* Concatenate ELEM to LIST, a comma-separated list. */
3389 str_comma_list_concat_elem (std::string *list, const char *elem)
3391 if (!list->empty ())
3392 list->append (", ");
3394 list->append (elem);
3397 /* Helper for target_options_to_string. If OPT is present in
3398 TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET.
3399 OPT is removed from TARGET_OPTIONS. */
3402 do_option (int *target_options, std::string *ret,
3403 int opt, const char *opt_str)
3405 if ((*target_options & opt) != 0)
3407 str_comma_list_concat_elem (ret, opt_str);
3408 *target_options &= ~opt;
3415 target_options_to_string (int target_options)
3419 #define DO_TARG_OPTION(OPT) \
3420 do_option (&target_options, &ret, OPT, #OPT)
3422 DO_TARG_OPTION (TARGET_WNOHANG);
3424 if (target_options != 0)
3425 str_comma_list_concat_elem (&ret, "unknown???");
3431 target_fetch_registers (struct regcache *regcache, int regno)
3433 current_top_target ()->fetch_registers (regcache, regno);
3435 regcache->debug_print_register ("target_fetch_registers", regno);
3439 target_store_registers (struct regcache *regcache, int regno)
3441 if (!may_write_registers)
3442 error (_("Writing to registers is not allowed (regno %d)"), regno);
3444 current_top_target ()->store_registers (regcache, regno);
3447 regcache->debug_print_register ("target_store_registers", regno);
3452 target_core_of_thread (ptid_t ptid)
3454 return current_top_target ()->core_of_thread (ptid);
3458 simple_verify_memory (struct target_ops *ops,
3459 const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
3461 LONGEST total_xfered = 0;
3463 while (total_xfered < size)
3465 ULONGEST xfered_len;
3466 enum target_xfer_status status;
3468 ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered);
3470 status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL,
3471 buf, NULL, lma + total_xfered, howmuch,
3473 if (status == TARGET_XFER_OK
3474 && memcmp (data + total_xfered, buf, xfered_len) == 0)
3476 total_xfered += xfered_len;
3485 /* Default implementation of memory verification. */
3488 default_verify_memory (struct target_ops *self,
3489 const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3491 /* Start over from the top of the target stack. */
3492 return simple_verify_memory (current_top_target (),
3493 data, memaddr, size);
3497 target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
3499 return current_top_target ()->verify_memory (data, memaddr, size);
3502 /* The documentation for this function is in its prototype declaration in
3506 target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3507 enum target_hw_bp_type rw)
3509 return current_top_target ()->insert_mask_watchpoint (addr, mask, rw);
3512 /* The documentation for this function is in its prototype declaration in
3516 target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask,
3517 enum target_hw_bp_type rw)
3519 return current_top_target ()->remove_mask_watchpoint (addr, mask, rw);
3522 /* The documentation for this function is in its prototype declaration
3526 target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
3528 return current_top_target ()->masked_watch_num_registers (addr, mask);
3531 /* The documentation for this function is in its prototype declaration
3535 target_ranged_break_num_registers (void)
3537 return current_top_target ()->ranged_break_num_registers ();
3542 struct btrace_target_info *
3543 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
3545 return current_top_target ()->enable_btrace (ptid, conf);
3551 target_disable_btrace (struct btrace_target_info *btinfo)
3553 current_top_target ()->disable_btrace (btinfo);
3559 target_teardown_btrace (struct btrace_target_info *btinfo)
3561 current_top_target ()->teardown_btrace (btinfo);
3567 target_read_btrace (struct btrace_data *btrace,
3568 struct btrace_target_info *btinfo,
3569 enum btrace_read_type type)
3571 return current_top_target ()->read_btrace (btrace, btinfo, type);
3576 const struct btrace_config *
3577 target_btrace_conf (const struct btrace_target_info *btinfo)
3579 return current_top_target ()->btrace_conf (btinfo);
3585 target_stop_recording (void)
3587 current_top_target ()->stop_recording ();
3593 target_save_record (const char *filename)
3595 current_top_target ()->save_record (filename);
3601 target_supports_delete_record ()
3603 return current_top_target ()->supports_delete_record ();
3609 target_delete_record (void)
3611 current_top_target ()->delete_record ();
3617 target_record_method (ptid_t ptid)
3619 return current_top_target ()->record_method (ptid);
3625 target_record_is_replaying (ptid_t ptid)
3627 return current_top_target ()->record_is_replaying (ptid);
3633 target_record_will_replay (ptid_t ptid, int dir)
3635 return current_top_target ()->record_will_replay (ptid, dir);
3641 target_record_stop_replaying (void)
3643 current_top_target ()->record_stop_replaying ();
3649 target_goto_record_begin (void)
3651 current_top_target ()->goto_record_begin ();
3657 target_goto_record_end (void)
3659 current_top_target ()->goto_record_end ();
3665 target_goto_record (ULONGEST insn)
3667 current_top_target ()->goto_record (insn);
3673 target_insn_history (int size, gdb_disassembly_flags flags)
3675 current_top_target ()->insn_history (size, flags);
3681 target_insn_history_from (ULONGEST from, int size,
3682 gdb_disassembly_flags flags)
3684 current_top_target ()->insn_history_from (from, size, flags);
3690 target_insn_history_range (ULONGEST begin, ULONGEST end,
3691 gdb_disassembly_flags flags)
3693 current_top_target ()->insn_history_range (begin, end, flags);
3699 target_call_history (int size, record_print_flags flags)
3701 current_top_target ()->call_history (size, flags);
3707 target_call_history_from (ULONGEST begin, int size, record_print_flags flags)
3709 current_top_target ()->call_history_from (begin, size, flags);
3715 target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags)
3717 current_top_target ()->call_history_range (begin, end, flags);
3722 const struct frame_unwind *
3723 target_get_unwinder (void)
3725 return current_top_target ()->get_unwinder ();
3730 const struct frame_unwind *
3731 target_get_tailcall_unwinder (void)
3733 return current_top_target ()->get_tailcall_unwinder ();
3739 target_prepare_to_generate_core (void)
3741 current_top_target ()->prepare_to_generate_core ();
3747 target_done_generating_core (void)
3749 current_top_target ()->done_generating_core ();
3754 static char targ_desc[] =
3755 "Names of targets and files being debugged.\nShows the entire \
3756 stack of targets currently in use (including the exec-file,\n\
3757 core-file, and process, if any), as well as the symbol file name.";
3760 default_rcmd (struct target_ops *self, const char *command,
3761 struct ui_file *output)
3763 error (_("\"monitor\" command not supported by this target."));
3767 do_monitor_command (const char *cmd, int from_tty)
3769 target_rcmd (cmd, gdb_stdtarg);
3772 /* Erases all the memory regions marked as flash. CMD and FROM_TTY are
3776 flash_erase_command (const char *cmd, int from_tty)
3778 /* Used to communicate termination of flash operations to the target. */
3779 bool found_flash_region = false;
3780 struct gdbarch *gdbarch = target_gdbarch ();
3782 std::vector<mem_region> mem_regions = target_memory_map ();
3784 /* Iterate over all memory regions. */
3785 for (const mem_region &m : mem_regions)
3787 /* Is this a flash memory region? */
3788 if (m.attrib.mode == MEM_FLASH)
3790 found_flash_region = true;
3791 target_flash_erase (m.lo, m.hi - m.lo);
3793 ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions");
3795 current_uiout->message (_("Erasing flash memory region at address "));
3796 current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo));
3797 current_uiout->message (", size = ");
3798 current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo));
3799 current_uiout->message ("\n");
3803 /* Did we do any flash operations? If so, we need to finalize them. */
3804 if (found_flash_region)
3805 target_flash_done ();
3807 current_uiout->message (_("No flash memory regions found.\n"));
3810 /* Print the name of each layers of our target stack. */
3813 maintenance_print_target_stack (const char *cmd, int from_tty)
3815 printf_filtered (_("The current target stack is:\n"));
3817 for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ())
3819 if (t->stratum () == debug_stratum)
3821 printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ());
3828 target_async (int enable)
3830 infrun_async (enable);
3831 current_top_target ()->async (enable);
3837 target_thread_events (int enable)
3839 current_top_target ()->thread_events (enable);
3842 /* Controls if targets can report that they can/are async. This is
3843 just for maintainers to use when debugging gdb. */
3844 int target_async_permitted = 1;
3846 /* The set command writes to this variable. If the inferior is
3847 executing, target_async_permitted is *not* updated. */
3848 static int target_async_permitted_1 = 1;
3851 maint_set_target_async_command (const char *args, int from_tty,
3852 struct cmd_list_element *c)
3854 if (have_live_inferiors ())
3856 target_async_permitted_1 = target_async_permitted;
3857 error (_("Cannot change this setting while the inferior is running."));
3860 target_async_permitted = target_async_permitted_1;
3864 maint_show_target_async_command (struct ui_file *file, int from_tty,
3865 struct cmd_list_element *c,
3868 fprintf_filtered (file,
3869 _("Controlling the inferior in "
3870 "asynchronous mode is %s.\n"), value);
3873 /* Return true if the target operates in non-stop mode even with "set
3877 target_always_non_stop_p (void)
3879 return current_top_target ()->always_non_stop_p ();
3885 target_is_non_stop_p (void)
3888 || target_non_stop_enabled == AUTO_BOOLEAN_TRUE
3889 || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO
3890 && target_always_non_stop_p ()));
3893 /* Controls if targets can report that they always run in non-stop
3894 mode. This is just for maintainers to use when debugging gdb. */
3895 enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO;
3897 /* The set command writes to this variable. If the inferior is
3898 executing, target_non_stop_enabled is *not* updated. */
3899 static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO;
3901 /* Implementation of "maint set target-non-stop". */
3904 maint_set_target_non_stop_command (const char *args, int from_tty,
3905 struct cmd_list_element *c)
3907 if (have_live_inferiors ())
3909 target_non_stop_enabled_1 = target_non_stop_enabled;
3910 error (_("Cannot change this setting while the inferior is running."));
3913 target_non_stop_enabled = target_non_stop_enabled_1;
3916 /* Implementation of "maint show target-non-stop". */
3919 maint_show_target_non_stop_command (struct ui_file *file, int from_tty,
3920 struct cmd_list_element *c,
3923 if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO)
3924 fprintf_filtered (file,
3925 _("Whether the target is always in non-stop mode "
3926 "is %s (currently %s).\n"), value,
3927 target_always_non_stop_p () ? "on" : "off");
3929 fprintf_filtered (file,
3930 _("Whether the target is always in non-stop mode "
3931 "is %s.\n"), value);
3934 /* Temporary copies of permission settings. */
3936 static int may_write_registers_1 = 1;
3937 static int may_write_memory_1 = 1;
3938 static int may_insert_breakpoints_1 = 1;
3939 static int may_insert_tracepoints_1 = 1;
3940 static int may_insert_fast_tracepoints_1 = 1;
3941 static int may_stop_1 = 1;
3943 /* Make the user-set values match the real values again. */
3946 update_target_permissions (void)
3948 may_write_registers_1 = may_write_registers;
3949 may_write_memory_1 = may_write_memory;
3950 may_insert_breakpoints_1 = may_insert_breakpoints;
3951 may_insert_tracepoints_1 = may_insert_tracepoints;
3952 may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints;
3953 may_stop_1 = may_stop;
3956 /* The one function handles (most of) the permission flags in the same
3960 set_target_permissions (const char *args, int from_tty,
3961 struct cmd_list_element *c)
3963 if (target_has_execution)
3965 update_target_permissions ();
3966 error (_("Cannot change this setting while the inferior is running."));
3969 /* Make the real values match the user-changed values. */
3970 may_write_registers = may_write_registers_1;
3971 may_insert_breakpoints = may_insert_breakpoints_1;
3972 may_insert_tracepoints = may_insert_tracepoints_1;
3973 may_insert_fast_tracepoints = may_insert_fast_tracepoints_1;
3974 may_stop = may_stop_1;
3975 update_observer_mode ();
3978 /* Set memory write permission independently of observer mode. */
3981 set_write_memory_permission (const char *args, int from_tty,
3982 struct cmd_list_element *c)
3984 /* Make the real values match the user-changed values. */
3985 may_write_memory = may_write_memory_1;
3986 update_observer_mode ();
3990 initialize_targets (void)
3992 push_target (&the_dummy_target);
3994 the_debug_target = new debug_target ();
3996 add_info ("target", info_target_command, targ_desc);
3997 add_info ("files", info_target_command, targ_desc);
3999 add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\
4000 Set target debugging."), _("\
4001 Show target debugging."), _("\
4002 When non-zero, target debugging is enabled. Higher numbers are more\n\
4006 &setdebuglist, &showdebuglist);
4008 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
4009 &trust_readonly, _("\
4010 Set mode for reading from readonly sections."), _("\
4011 Show mode for reading from readonly sections."), _("\
4012 When this mode is on, memory reads from readonly sections (such as .text)\n\
4013 will be read from the object file instead of from the target. This will\n\
4014 result in significant performance improvement for remote targets."),
4016 show_trust_readonly,
4017 &setlist, &showlist);
4019 add_com ("monitor", class_obscure, do_monitor_command,
4020 _("Send a command to the remote monitor (remote targets only)."));
4022 add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack,
4023 _("Print the name of each layer of the internal target stack."),
4024 &maintenanceprintlist);
4026 add_setshow_boolean_cmd ("target-async", no_class,
4027 &target_async_permitted_1, _("\
4028 Set whether gdb controls the inferior in asynchronous mode."), _("\
4029 Show whether gdb controls the inferior in asynchronous mode."), _("\
4030 Tells gdb whether to control the inferior in asynchronous mode."),
4031 maint_set_target_async_command,
4032 maint_show_target_async_command,
4033 &maintenance_set_cmdlist,
4034 &maintenance_show_cmdlist);
4036 add_setshow_auto_boolean_cmd ("target-non-stop", no_class,
4037 &target_non_stop_enabled_1, _("\
4038 Set whether gdb always controls the inferior in non-stop mode."), _("\
4039 Show whether gdb always controls the inferior in non-stop mode."), _("\
4040 Tells gdb whether to control the inferior in non-stop mode."),
4041 maint_set_target_non_stop_command,
4042 maint_show_target_non_stop_command,
4043 &maintenance_set_cmdlist,
4044 &maintenance_show_cmdlist);
4046 add_setshow_boolean_cmd ("may-write-registers", class_support,
4047 &may_write_registers_1, _("\
4048 Set permission to write into registers."), _("\
4049 Show permission to write into registers."), _("\
4050 When this permission is on, GDB may write into the target's registers.\n\
4051 Otherwise, any sort of write attempt will result in an error."),
4052 set_target_permissions, NULL,
4053 &setlist, &showlist);
4055 add_setshow_boolean_cmd ("may-write-memory", class_support,
4056 &may_write_memory_1, _("\
4057 Set permission to write into target memory."), _("\
4058 Show permission to write into target memory."), _("\
4059 When this permission is on, GDB may write into the target's memory.\n\
4060 Otherwise, any sort of write attempt will result in an error."),
4061 set_write_memory_permission, NULL,
4062 &setlist, &showlist);
4064 add_setshow_boolean_cmd ("may-insert-breakpoints", class_support,
4065 &may_insert_breakpoints_1, _("\
4066 Set permission to insert breakpoints in the target."), _("\
4067 Show permission to insert breakpoints in the target."), _("\
4068 When this permission is on, GDB may insert breakpoints in the program.\n\
4069 Otherwise, any sort of insertion attempt will result in an error."),
4070 set_target_permissions, NULL,
4071 &setlist, &showlist);
4073 add_setshow_boolean_cmd ("may-insert-tracepoints", class_support,
4074 &may_insert_tracepoints_1, _("\
4075 Set permission to insert tracepoints in the target."), _("\
4076 Show permission to insert tracepoints in the target."), _("\
4077 When this permission is on, GDB may insert tracepoints in the program.\n\
4078 Otherwise, any sort of insertion attempt will result in an error."),
4079 set_target_permissions, NULL,
4080 &setlist, &showlist);
4082 add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support,
4083 &may_insert_fast_tracepoints_1, _("\
4084 Set permission to insert fast tracepoints in the target."), _("\
4085 Show permission to insert fast tracepoints in the target."), _("\
4086 When this permission is on, GDB may insert fast tracepoints.\n\
4087 Otherwise, any sort of insertion attempt will result in an error."),
4088 set_target_permissions, NULL,
4089 &setlist, &showlist);
4091 add_setshow_boolean_cmd ("may-interrupt", class_support,
4093 Set permission to interrupt or signal the target."), _("\
4094 Show permission to interrupt or signal the target."), _("\
4095 When this permission is on, GDB may interrupt/stop the target's execution.\n\
4096 Otherwise, any attempt to interrupt or stop will be ignored."),
4097 set_target_permissions, NULL,
4098 &setlist, &showlist);
4100 add_com ("flash-erase", no_class, flash_erase_command,
4101 _("Erase all flash memory regions."));
4103 add_setshow_boolean_cmd ("auto-connect-native-target", class_support,
4104 &auto_connect_native_target, _("\
4105 Set whether GDB may automatically connect to the native target."), _("\
4106 Show whether GDB may automatically connect to the native target."), _("\
4107 When on, and GDB is not connected to a target yet, GDB\n\
4108 attempts \"run\" and other commands with the native target."),
4109 NULL, show_auto_connect_native_target,
4110 &setlist, &showlist);