1 /* Dynamic architecture support for GDB, the GNU debugger.
3 Copyright (C) 1998-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "arch-utils.h"
25 #include "inferior.h" /* enum CALL_DUMMY_LOCATION et al. */
28 #include "sim-regno.h"
31 #include "target-descriptions.h"
36 #include "common/version.h"
38 #include "floatformat.h"
40 struct displaced_step_closure *
41 simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
42 CORE_ADDR from, CORE_ADDR to,
43 struct regcache *regs)
45 size_t len = gdbarch_max_insn_length (gdbarch);
46 gdb_byte *buf = xmalloc (len);
48 read_memory (from, buf, len);
49 write_memory (to, buf, len);
53 fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ",
54 paddress (gdbarch, from), paddress (gdbarch, to));
55 displaced_step_dump_bytes (gdb_stdlog, buf, len);
58 return (struct displaced_step_closure *) buf;
63 simple_displaced_step_free_closure (struct gdbarch *gdbarch,
64 struct displaced_step_closure *closure)
70 default_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
71 struct displaced_step_closure *closure)
73 return !gdbarch_software_single_step_p (gdbarch);
77 displaced_step_at_entry_point (struct gdbarch *gdbarch)
82 addr = entry_point_address ();
84 /* Inferior calls also use the entry point as a breakpoint location.
85 We don't want displaced stepping to interfere with those
86 breakpoints, so leave space. */
87 gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len);
94 legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum)
96 /* Only makes sense to supply raw registers. */
97 gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
98 /* NOTE: cagney/2002-05-13: The old code did it this way and it is
99 suspected that some GDB/SIM combinations may rely on this
100 behavour. The default should be one2one_register_sim_regno
102 if (gdbarch_register_name (gdbarch, regnum) != NULL
103 && gdbarch_register_name (gdbarch, regnum)[0] != '\0')
106 return LEGACY_SIM_REGNO_IGNORE;
110 generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
116 generic_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc)
122 generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
123 CORE_ADDR pc, const char *name)
129 generic_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
134 /* Helper functions for gdbarch_inner_than */
137 core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
143 core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
148 /* Misc helper functions for targets. */
151 core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr)
157 convert_from_func_ptr_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr,
158 struct target_ops *targ)
164 no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg)
170 default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
175 /* See arch-utils.h. */
178 default_make_symbol_special (struct symbol *sym, struct objfile *objfile)
183 /* See arch-utils.h. */
186 default_adjust_dwarf2_addr (CORE_ADDR pc)
191 /* See arch-utils.h. */
194 default_adjust_dwarf2_line (CORE_ADDR addr, int rel)
200 cannot_register_not (struct gdbarch *gdbarch, int regnum)
205 /* Legacy version of target_virtual_frame_pointer(). Assumes that
206 there is an gdbarch_deprecated_fp_regnum and that it is the same,
210 legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
213 LONGEST *frame_offset)
215 /* FIXME: cagney/2002-09-13: This code is used when identifying the
216 frame pointer of the current PC. It is assuming that a single
217 register and an offset can determine this. I think it should
218 instead generate a byte code expression as that would work better
219 with things like Dwarf2's CFI. */
220 if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0
221 && gdbarch_deprecated_fp_regnum (gdbarch)
222 < gdbarch_num_regs (gdbarch))
223 *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch);
224 else if (gdbarch_sp_regnum (gdbarch) >= 0
225 && gdbarch_sp_regnum (gdbarch)
226 < gdbarch_num_regs (gdbarch))
227 *frame_regnum = gdbarch_sp_regnum (gdbarch);
229 /* Should this be an internal error? I guess so, it is reflecting
230 an architectural limitation in the current design. */
231 internal_error (__FILE__, __LINE__,
232 _("No virtual frame pointer available"));
238 generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
245 default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
251 generic_instruction_nullified (struct gdbarch *gdbarch,
252 struct regcache *regcache)
258 default_remote_register_number (struct gdbarch *gdbarch,
264 /* See arch-utils.h. */
267 default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
273 /* Functions to manipulate the endianness of the target. */
275 static int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
277 static const char endian_big[] = "big";
278 static const char endian_little[] = "little";
279 static const char endian_auto[] = "auto";
280 static const char *const endian_enum[] =
287 static const char *set_endian_string;
290 selected_byte_order (void)
292 return target_byte_order_user;
295 /* Called by ``show endian''. */
298 show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c,
301 if (target_byte_order_user == BFD_ENDIAN_UNKNOWN)
302 if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG)
303 fprintf_unfiltered (file, _("The target endianness is set automatically "
304 "(currently big endian)\n"));
306 fprintf_unfiltered (file, _("The target endianness is set automatically "
307 "(currently little endian)\n"));
309 if (target_byte_order_user == BFD_ENDIAN_BIG)
310 fprintf_unfiltered (file,
311 _("The target is assumed to be big endian\n"));
313 fprintf_unfiltered (file,
314 _("The target is assumed to be little endian\n"));
318 set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
320 struct gdbarch_info info;
322 gdbarch_info_init (&info);
324 if (set_endian_string == endian_auto)
326 target_byte_order_user = BFD_ENDIAN_UNKNOWN;
327 if (! gdbarch_update_p (info))
328 internal_error (__FILE__, __LINE__,
329 _("set_endian: architecture update failed"));
331 else if (set_endian_string == endian_little)
333 info.byte_order = BFD_ENDIAN_LITTLE;
334 if (! gdbarch_update_p (info))
335 printf_unfiltered (_("Little endian target not supported by GDB\n"));
337 target_byte_order_user = BFD_ENDIAN_LITTLE;
339 else if (set_endian_string == endian_big)
341 info.byte_order = BFD_ENDIAN_BIG;
342 if (! gdbarch_update_p (info))
343 printf_unfiltered (_("Big endian target not supported by GDB\n"));
345 target_byte_order_user = BFD_ENDIAN_BIG;
348 internal_error (__FILE__, __LINE__,
349 _("set_endian: bad value"));
351 show_endian (gdb_stdout, from_tty, NULL, NULL);
354 /* Given SELECTED, a currently selected BFD architecture, and
355 TARGET_DESC, the current target description, return what
358 SELECTED may be NULL, in which case we return the architecture
359 associated with TARGET_DESC. If SELECTED specifies a variant
360 of the architecture associtated with TARGET_DESC, return the
361 more specific of the two.
363 If SELECTED is a different architecture, but it is accepted as
364 compatible by the target, we can use the target architecture.
366 If SELECTED is obviously incompatible, warn the user. */
368 static const struct bfd_arch_info *
369 choose_architecture_for_target (const struct target_desc *target_desc,
370 const struct bfd_arch_info *selected)
372 const struct bfd_arch_info *from_target = tdesc_architecture (target_desc);
373 const struct bfd_arch_info *compat1, *compat2;
375 if (selected == NULL)
378 if (from_target == NULL)
381 /* struct bfd_arch_info objects are singletons: that is, there's
382 supposed to be exactly one instance for a given machine. So you
383 can tell whether two are equivalent by comparing pointers. */
384 if (from_target == selected)
387 /* BFD's 'A->compatible (A, B)' functions return zero if A and B are
388 incompatible. But if they are compatible, it returns the 'more
389 featureful' of the two arches. That is, if A can run code
390 written for B, but B can't run code written for A, then it'll
393 Some targets (e.g. MIPS as of 2006-12-04) don't fully
394 implement this, instead always returning NULL or the first
395 argument. We detect that case by checking both directions. */
397 compat1 = selected->compatible (selected, from_target);
398 compat2 = from_target->compatible (from_target, selected);
400 if (compat1 == NULL && compat2 == NULL)
402 /* BFD considers the architectures incompatible. Check our
403 target description whether it accepts SELECTED as compatible
405 if (tdesc_compatible_p (target_desc, selected))
408 warning (_("Selected architecture %s is not compatible "
409 "with reported target architecture %s"),
410 selected->printable_name, from_target->printable_name);
418 if (compat1 == compat2)
421 /* If the two didn't match, but one of them was a default
422 architecture, assume the more specific one is correct. This
423 handles the case where an executable or target description just
424 says "mips", but the other knows which MIPS variant. */
425 if (compat1->the_default)
427 if (compat2->the_default)
430 /* We have no idea which one is better. This is a bug, but not
431 a critical problem; warn the user. */
432 warning (_("Selected architecture %s is ambiguous with "
433 "reported target architecture %s"),
434 selected->printable_name, from_target->printable_name);
438 /* Functions to manipulate the architecture of the target. */
440 enum set_arch { set_arch_auto, set_arch_manual };
442 static const struct bfd_arch_info *target_architecture_user;
444 static const char *set_architecture_string;
447 selected_architecture_name (void)
449 if (target_architecture_user == NULL)
452 return set_architecture_string;
455 /* Called if the user enters ``show architecture'' without an
459 show_architecture (struct ui_file *file, int from_tty,
460 struct cmd_list_element *c, const char *value)
462 if (target_architecture_user == NULL)
463 fprintf_filtered (file, _("The target architecture is set "
464 "automatically (currently %s)\n"),
465 gdbarch_bfd_arch_info (get_current_arch ())->printable_name);
467 fprintf_filtered (file, _("The target architecture is assumed to be %s\n"),
468 set_architecture_string);
472 /* Called if the user enters ``set architecture'' with or without an
476 set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
478 struct gdbarch_info info;
480 gdbarch_info_init (&info);
482 if (strcmp (set_architecture_string, "auto") == 0)
484 target_architecture_user = NULL;
485 if (!gdbarch_update_p (info))
486 internal_error (__FILE__, __LINE__,
487 _("could not select an architecture automatically"));
491 info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
492 if (info.bfd_arch_info == NULL)
493 internal_error (__FILE__, __LINE__,
494 _("set_architecture: bfd_scan_arch failed"));
495 if (gdbarch_update_p (info))
496 target_architecture_user = info.bfd_arch_info;
498 printf_unfiltered (_("Architecture `%s' not recognized.\n"),
499 set_architecture_string);
501 show_architecture (gdb_stdout, from_tty, NULL, NULL);
504 /* Try to select a global architecture that matches "info". Return
505 non-zero if the attempt succeeds. */
507 gdbarch_update_p (struct gdbarch_info info)
509 struct gdbarch *new_gdbarch;
511 /* Check for the current file. */
512 if (info.abfd == NULL)
513 info.abfd = exec_bfd;
514 if (info.abfd == NULL)
515 info.abfd = core_bfd;
517 /* Check for the current target description. */
518 if (info.target_desc == NULL)
519 info.target_desc = target_current_description ();
521 new_gdbarch = gdbarch_find_by_info (info);
523 /* If there no architecture by that name, reject the request. */
524 if (new_gdbarch == NULL)
527 fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
528 "Architecture not found\n");
532 /* If it is the same old architecture, accept the request (but don't
534 if (new_gdbarch == target_gdbarch ())
537 fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
538 "Architecture %s (%s) unchanged\n",
539 host_address_to_string (new_gdbarch),
540 gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
544 /* It's a new architecture, swap it in. */
546 fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
547 "New architecture %s (%s) selected\n",
548 host_address_to_string (new_gdbarch),
549 gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
550 set_target_gdbarch (new_gdbarch);
555 /* Return the architecture for ABFD. If no suitable architecture
556 could be find, return NULL. */
559 gdbarch_from_bfd (bfd *abfd)
561 struct gdbarch_info info;
562 gdbarch_info_init (&info);
565 return gdbarch_find_by_info (info);
568 /* Set the dynamic target-system-dependent parameters (architecture,
569 byte-order) using information found in the BFD */
572 set_gdbarch_from_file (bfd *abfd)
574 struct gdbarch_info info;
575 struct gdbarch *gdbarch;
577 gdbarch_info_init (&info);
579 info.target_desc = target_current_description ();
580 gdbarch = gdbarch_find_by_info (info);
583 error (_("Architecture of file not recognized."));
584 set_target_gdbarch (gdbarch);
587 /* Initialize the current architecture. Update the ``set
588 architecture'' command so that it specifies a list of valid
591 #ifdef DEFAULT_BFD_ARCH
592 extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
593 static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
595 static const bfd_arch_info_type *default_bfd_arch;
598 #ifdef DEFAULT_BFD_VEC
599 extern const bfd_target DEFAULT_BFD_VEC;
600 static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
602 static const bfd_target *default_bfd_vec;
605 static int default_byte_order = BFD_ENDIAN_UNKNOWN;
608 initialize_current_architecture (void)
610 const char **arches = gdbarch_printable_names ();
611 struct gdbarch_info info;
613 /* determine a default architecture and byte order. */
614 gdbarch_info_init (&info);
616 /* Find a default architecture. */
617 if (default_bfd_arch == NULL)
619 /* Choose the architecture by taking the first one
621 const char *chosen = arches[0];
623 for (arch = arches; *arch != NULL; arch++)
625 if (strcmp (*arch, chosen) < 0)
629 internal_error (__FILE__, __LINE__,
630 _("initialize_current_architecture: No arch"));
631 default_bfd_arch = bfd_scan_arch (chosen);
632 if (default_bfd_arch == NULL)
633 internal_error (__FILE__, __LINE__,
634 _("initialize_current_architecture: Arch not found"));
637 info.bfd_arch_info = default_bfd_arch;
639 /* Take several guesses at a byte order. */
640 if (default_byte_order == BFD_ENDIAN_UNKNOWN
641 && default_bfd_vec != NULL)
643 /* Extract BFD's default vector's byte order. */
644 switch (default_bfd_vec->byteorder)
647 default_byte_order = BFD_ENDIAN_BIG;
649 case BFD_ENDIAN_LITTLE:
650 default_byte_order = BFD_ENDIAN_LITTLE;
656 if (default_byte_order == BFD_ENDIAN_UNKNOWN)
658 /* look for ``*el-*'' in the target name. */
660 chp = strchr (target_name, '-');
662 && chp - 2 >= target_name
663 && startswith (chp - 2, "el"))
664 default_byte_order = BFD_ENDIAN_LITTLE;
666 if (default_byte_order == BFD_ENDIAN_UNKNOWN)
668 /* Wire it to big-endian!!! */
669 default_byte_order = BFD_ENDIAN_BIG;
672 info.byte_order = default_byte_order;
673 info.byte_order_for_code = info.byte_order;
675 if (! gdbarch_update_p (info))
676 internal_error (__FILE__, __LINE__,
677 _("initialize_current_architecture: Selection of "
678 "initial architecture failed"));
680 /* Create the ``set architecture'' command appending ``auto'' to the
681 list of architectures. */
683 /* Append ``auto''. */
685 for (nr = 0; arches[nr] != NULL; nr++);
686 arches = xrealloc (arches, sizeof (char*) * (nr + 2));
687 arches[nr + 0] = "auto";
688 arches[nr + 1] = NULL;
689 add_setshow_enum_cmd ("architecture", class_support,
690 arches, &set_architecture_string,
691 _("Set architecture of target."),
692 _("Show architecture of target."), NULL,
693 set_architecture, show_architecture,
694 &setlist, &showlist);
695 add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
700 /* Initialize a gdbarch info to values that will be automatically
701 overridden. Note: Originally, this ``struct info'' was initialized
702 using memset(0). Unfortunately, that ran into problems, namely
703 BFD_ENDIAN_BIG is zero. An explicit initialization function that
704 can explicitly set each field to a well defined value is used. */
707 gdbarch_info_init (struct gdbarch_info *info)
709 memset (info, 0, sizeof (struct gdbarch_info));
710 info->byte_order = BFD_ENDIAN_UNKNOWN;
711 info->byte_order_for_code = info->byte_order;
712 info->osabi = GDB_OSABI_UNINITIALIZED;
715 /* Similar to init, but this time fill in the blanks. Information is
716 obtained from the global "set ..." options and explicitly
717 initialized INFO fields. */
720 gdbarch_info_fill (struct gdbarch_info *info)
722 /* "(gdb) set architecture ...". */
723 if (info->bfd_arch_info == NULL
724 && target_architecture_user)
725 info->bfd_arch_info = target_architecture_user;
727 if (info->bfd_arch_info == NULL
728 && info->abfd != NULL
729 && bfd_get_arch (info->abfd) != bfd_arch_unknown
730 && bfd_get_arch (info->abfd) != bfd_arch_obscure)
731 info->bfd_arch_info = bfd_get_arch_info (info->abfd);
732 /* From the target. */
733 if (info->target_desc != NULL)
734 info->bfd_arch_info = choose_architecture_for_target
735 (info->target_desc, info->bfd_arch_info);
736 /* From the default. */
737 if (info->bfd_arch_info == NULL)
738 info->bfd_arch_info = default_bfd_arch;
740 /* "(gdb) set byte-order ...". */
741 if (info->byte_order == BFD_ENDIAN_UNKNOWN
742 && target_byte_order_user != BFD_ENDIAN_UNKNOWN)
743 info->byte_order = target_byte_order_user;
744 /* From the INFO struct. */
745 if (info->byte_order == BFD_ENDIAN_UNKNOWN
746 && info->abfd != NULL)
747 info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG
748 : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
749 : BFD_ENDIAN_UNKNOWN);
750 /* From the default. */
751 if (info->byte_order == BFD_ENDIAN_UNKNOWN)
752 info->byte_order = default_byte_order;
753 info->byte_order_for_code = info->byte_order;
755 /* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
756 /* From the manual override, or from file. */
757 if (info->osabi == GDB_OSABI_UNINITIALIZED)
758 info->osabi = gdbarch_lookup_osabi (info->abfd);
759 /* From the target. */
760 if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL)
761 info->osabi = tdesc_osabi (info->target_desc);
762 /* From the configured default. */
763 #ifdef GDB_OSABI_DEFAULT
764 if (info->osabi == GDB_OSABI_UNKNOWN)
765 info->osabi = GDB_OSABI_DEFAULT;
768 /* Must have at least filled in the architecture. */
769 gdb_assert (info->bfd_arch_info != NULL);
772 /* Return "current" architecture. If the target is running, this is
773 the architecture of the selected frame. Otherwise, the "current"
774 architecture defaults to the target architecture.
776 This function should normally be called solely by the command
777 interpreter routines to determine the architecture to execute a
780 get_current_arch (void)
782 if (has_stack_frames ())
783 return get_frame_arch (get_selected_frame (NULL));
785 return target_gdbarch ();
789 default_has_shared_address_space (struct gdbarch *gdbarch)
791 /* Simply say no. In most unix-like targets each inferior/process
792 has its own address space. */
797 default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
798 CORE_ADDR addr, int *isize, char **msg)
800 /* We don't know if maybe the target has some way to do fast
801 tracepoints that doesn't need gdbarch, so always say yes. */
808 default_remote_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
811 gdbarch_breakpoint_from_pc (gdbarch, pcptr, kindptr);
815 default_gen_return_address (struct gdbarch *gdbarch,
816 struct agent_expr *ax, struct axs_value *value,
819 error (_("This architecture has no method to collect a return address."));
823 default_return_in_first_hidden_param_p (struct gdbarch *gdbarch,
826 /* Usually, the return value's address is stored the in the "first hidden"
827 parameter if the return value should be passed by reference, as
829 return language_pass_by_reference (type);
832 int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr)
837 int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr)
842 int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr)
848 default_skip_permanent_breakpoint (struct regcache *regcache)
850 struct gdbarch *gdbarch = get_regcache_arch (regcache);
851 CORE_ADDR current_pc = regcache_read_pc (regcache);
852 const gdb_byte *bp_insn;
855 bp_insn = gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len);
856 current_pc += bp_len;
857 regcache_write_pc (regcache, current_pc);
861 default_infcall_mmap (CORE_ADDR size, unsigned prot)
863 error (_("This target does not support inferior memory allocation by mmap."));
867 default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size)
869 /* Memory reserved by inferior mmap is kept leaked. */
872 /* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be
873 created in inferior memory by GDB (normally it is set by ld.so). */
876 default_gcc_target_options (struct gdbarch *gdbarch)
878 return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch),
879 gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : "");
882 /* gdbarch gnu_triplet_regexp method. */
885 default_gnu_triplet_regexp (struct gdbarch *gdbarch)
887 return gdbarch_bfd_arch_info (gdbarch)->arch_name;
890 /* Default method for gdbarch_addressable_memory_unit_size. By default, a memory byte has
891 a size of 1 octet. */
894 default_addressable_memory_unit_size (struct gdbarch *gdbarch)
899 /* -Wmissing-prototypes */
900 extern initialize_file_ftype _initialize_gdbarch_utils;
903 _initialize_gdbarch_utils (void)
905 add_setshow_enum_cmd ("endian", class_support,
906 endian_enum, &set_endian_string,
907 _("Set endianness of target."),
908 _("Show endianness of target."),
909 NULL, set_endian, show_endian,
910 &setlist, &showlist);