gdb/arch-utils.c

   1 /* Dynamic architecture support for GDB, the GNU debugger.
   2    Copyright 1998-1999, Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22
  23 #if GDB_MULTI_ARCH
  24 #include "gdbcmd.h"
  25 #include "inferior.h"           /* enum CALL_DUMMY_LOCATION et.al. */
  26 #else
  27 /* Just include everything in sight so that the every old definition
  28    of macro is visible. */
  29 #include "gdb_string.h"
  30 #include <ctype.h>
  31 #include "symtab.h"
  32 #include "frame.h"
  33 #include "inferior.h"
  34 #include "breakpoint.h"
  35 #include "gdb_wait.h"
  36 #include "gdbcore.h"
  37 #include "gdbcmd.h"
  38 #include "target.h"
  39 #include "gdbthread.h"
  40 #include "annotate.h"
  41 #include "symfile.h"            /* for overlay functions */
  42 #endif
  43
  44 #include "version.h"
  45
  46 #include "floatformat.h"
  47
  48 /* Convenience macro for allocting typesafe memory. */
  49
  50 #ifndef XMALLOC
  51 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  52 #endif
  53
  54
  55 /* Use the program counter to determine the contents and size
  56    of a breakpoint instruction.  If no target-dependent macro
  57    BREAKPOINT_FROM_PC has been defined to implement this function,
  58    assume that the breakpoint doesn't depend on the PC, and
  59    use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
  60    Return a pointer to a string of bytes that encode a breakpoint
  61    instruction, stores the length of the string to *lenptr,
  62    and optionally adjust the pc to point to the correct memory location
  63    for inserting the breakpoint.  */
  64
  65 unsigned char *
  66 legacy_breakpoint_from_pc (CORE_ADDR * pcptr, int *lenptr)
  67 {
  68   /* {BIG_,LITTLE_}BREAKPOINT is the sequence of bytes we insert for a
  69      breakpoint.  On some machines, breakpoints are handled by the
  70      target environment and we don't have to worry about them here.  */
  71 #ifdef BIG_BREAKPOINT
  72   if (TARGET_BYTE_ORDER == BIG_ENDIAN)
  73     {
  74       static unsigned char big_break_insn[] = BIG_BREAKPOINT;
  75       *lenptr = sizeof (big_break_insn);
  76       return big_break_insn;
  77     }
  78 #endif
  79 #ifdef LITTLE_BREAKPOINT
  80   if (TARGET_BYTE_ORDER != BIG_ENDIAN)
  81     {
  82       static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
  83       *lenptr = sizeof (little_break_insn);
  84       return little_break_insn;
  85     }
  86 #endif
  87 #ifdef BREAKPOINT
  88   {
  89     static unsigned char break_insn[] = BREAKPOINT;
  90     *lenptr = sizeof (break_insn);
  91     return break_insn;
  92   }
  93 #endif
  94   *lenptr = 0;
  95   return NULL;
  96 }
  97
  98 int
  99 generic_frameless_function_invocation_not (struct frame_info *fi)
 100 {
 101   return 0;
 102 }
 103
 104 int
 105 generic_return_value_on_stack_not (struct type *type)
 106 {
 107   return 0;
 108 }
 109
 110 char *
 111 legacy_register_name (int i)
 112 {
 113 #ifdef REGISTER_NAMES
 114   static char *names[] = REGISTER_NAMES;
 115   if (i < 0 || i >= (sizeof (names) / sizeof (*names)))
 116     return NULL;
 117   else
 118     return names[i];
 119 #else
 120   internal_error ("legacy_register_name: called.");
 121   return NULL;
 122 #endif
 123 }
 124
 125 #if defined (CALL_DUMMY)
 126 LONGEST legacy_call_dummy_words[] = CALL_DUMMY;
 127 #else
 128 LONGEST legacy_call_dummy_words[1];
 129 #endif
 130 int legacy_sizeof_call_dummy_words = sizeof (legacy_call_dummy_words);
 131
 132 void
 133 generic_remote_translate_xfer_address (CORE_ADDR gdb_addr, int gdb_len,
 134                                        CORE_ADDR * rem_addr, int *rem_len)
 135 {
 136   *rem_addr = gdb_addr;
 137   *rem_len = gdb_len;
 138 }
 139
 140 int
 141 generic_prologue_frameless_p (CORE_ADDR ip)
 142 {
 143 #ifdef SKIP_PROLOGUE_FRAMELESS_P
 144   return ip == SKIP_PROLOGUE_FRAMELESS_P (ip);
 145 #else
 146   return ip == SKIP_PROLOGUE (ip);
 147 #endif
 148 }
 149
 150
 151 /* Helper functions for INNER_THAN */
 152
 153 int
 154 core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
 155 {
 156   return (lhs < rhs);
 157 }
 158
 159 int
 160 core_addr_greaterthan (CORE_ADDR lhs, CORE_ADDR rhs)
 161 {
 162   return (lhs > rhs);
 163 }
 164
 165
 166 /* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */
 167
 168 const struct floatformat *
 169 default_float_format (struct gdbarch *gdbarch)
 170 {
 171 #if GDB_MULTI_ARCH
 172   int byte_order = gdbarch_byte_order (gdbarch);
 173 #else
 174   int byte_order = TARGET_BYTE_ORDER;
 175 #endif
 176   switch (byte_order)
 177     {
 178     case BIG_ENDIAN:
 179       return &floatformat_ieee_single_big;
 180     case LITTLE_ENDIAN:
 181       return &floatformat_ieee_single_little;
 182     default:
 183       internal_error ("default_float_format: bad byte order");
 184     }
 185 }
 186
 187
 188 const struct floatformat *
 189 default_double_format (struct gdbarch *gdbarch)
 190 {
 191 #if GDB_MULTI_ARCH
 192   int byte_order = gdbarch_byte_order (gdbarch);
 193 #else
 194   int byte_order = TARGET_BYTE_ORDER;
 195 #endif
 196   switch (byte_order)
 197     {
 198     case BIG_ENDIAN:
 199       return &floatformat_ieee_double_big;
 200     case LITTLE_ENDIAN:
 201       return &floatformat_ieee_double_little;
 202     default:
 203       internal_error ("default_double_format: bad byte order");
 204     }
 205 }
 206
 207 /* Misc helper functions for targets. */
 208
 209 int
 210 frame_num_args_unknown (struct frame_info *fi)
 211 {
 212   return -1;
 213 }
 214
 215
 216 int
 217 generic_register_convertible_not (int num)
 218 {
 219   return 0;
 220 }
 221
 222
 223 int
 224 default_register_sim_regno (int num)
 225 {
 226   return num;
 227 }
 228
 229
 230 CORE_ADDR
 231 default_convert_from_func_ptr_addr (CORE_ADDR addr)
 232 {
 233   return addr;
 234 }
 235
 236 int
 237 no_op_reg_to_regnum (int reg)
 238 {
 239   return reg;
 240 }
 241
 242 /* For use by frame_args_address and frame_locals_address.  */
 243 CORE_ADDR
 244 default_frame_address (struct frame_info *fi)
 245 {
 246   return fi->frame;
 247 }
 248
 249 /* Functions to manipulate the endianness of the target.  */
 250
 251 #ifdef TARGET_BYTE_ORDER_SELECTABLE
 252 /* compat - Catch old targets that expect a selectable byte-order to
 253    default to BIG_ENDIAN */
 254 #ifndef TARGET_BYTE_ORDER_DEFAULT
 255 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
 256 #endif
 257 #endif
 258 #if !TARGET_BYTE_ORDER_SELECTABLE_P
 259 #ifndef TARGET_BYTE_ORDER_DEFAULT
 260 /* compat - Catch old non byte-order selectable targets that do not
 261    define TARGET_BYTE_ORDER_DEFAULT and instead expect
 262    TARGET_BYTE_ORDER to be used as the default.  For targets that
 263    defined neither TARGET_BYTE_ORDER nor TARGET_BYTE_ORDER_DEFAULT the
 264    below will get a strange compiler warning. */
 265 #define TARGET_BYTE_ORDER_DEFAULT TARGET_BYTE_ORDER
 266 #endif
 267 #endif
 268 #ifndef TARGET_BYTE_ORDER_DEFAULT
 269 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN /* arbitrary */
 270 #endif
 271 /* ``target_byte_order'' is only used when non- multi-arch.
 272    Multi-arch targets obtain the current byte order using
 273    TARGET_BYTE_ORDER which is controlled by gdbarch.*. */
 274 int target_byte_order = TARGET_BYTE_ORDER_DEFAULT;
 275 int target_byte_order_auto = 1;
 276
 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 *endian_enum[] =
 281 {
 282   endian_big,
 283   endian_little,
 284   endian_auto,
 285   NULL,
 286 };
 287 static const char *set_endian_string;
 288
 289 /* Called by ``show endian''.  */
 290
 291 static void
 292 show_endian (char *args, int from_tty)
 293 {
 294   if (TARGET_BYTE_ORDER_AUTO)
 295     printf_unfiltered ("The target endianness is set automatically (currently %s endian)\n",
 296                        (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
 297   else
 298     printf_unfiltered ("The target is assumed to be %s endian\n",
 299                        (TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"));
 300 }
 301
 302 static void
 303 set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
 304 {
 305   if (!TARGET_BYTE_ORDER_SELECTABLE_P)
 306     {
 307       printf_unfiltered ("Byte order is not selectable.");
 308     }
 309   else if (set_endian_string == endian_auto)
 310     {
 311       target_byte_order_auto = 1;
 312     }
 313   else if (set_endian_string == endian_little)
 314     {
 315       target_byte_order_auto = 0;
 316       if (GDB_MULTI_ARCH)
 317         {
 318           struct gdbarch_info info;
 319           memset (&info, 0, sizeof info);
 320           info.byte_order = LITTLE_ENDIAN;
 321           if (! gdbarch_update_p (info))
 322             {
 323               printf_unfiltered ("Little endian target not supported by GDB\n");
 324             }
 325         }
 326       else
 327         {
 328           target_byte_order = LITTLE_ENDIAN;
 329         }
 330     }
 331   else if (set_endian_string == endian_big)
 332     {
 333       target_byte_order_auto = 0;
 334       if (GDB_MULTI_ARCH)
 335         {
 336           struct gdbarch_info info;
 337           memset (&info, 0, sizeof info);
 338           info.byte_order = BIG_ENDIAN;
 339           if (! gdbarch_update_p (info))
 340             {
 341               printf_unfiltered ("Big endian target not supported by GDB\n");
 342             }
 343         }
 344       else
 345         {
 346           target_byte_order = BIG_ENDIAN;
 347         }
 348     }
 349   else
 350     internal_error ("set_endian: bad value");
 351   show_endian (NULL, from_tty);
 352 }
 353
 354 /* Set the endianness from a BFD.  */
 355
 356 static void
 357 set_endian_from_file (bfd *abfd)
 358 {
 359   if (GDB_MULTI_ARCH)
 360     internal_error ("set_endian_from_file: not for multi-arch");
 361   if (TARGET_BYTE_ORDER_SELECTABLE_P)
 362     {
 363       int want;
 364
 365       if (bfd_big_endian (abfd))
 366         want = BIG_ENDIAN;
 367       else
 368         want = LITTLE_ENDIAN;
 369       if (TARGET_BYTE_ORDER_AUTO)
 370         target_byte_order = want;
 371       else if (TARGET_BYTE_ORDER != want)
 372         warning ("%s endian file does not match %s endian target.",
 373                  want == BIG_ENDIAN ? "big" : "little",
 374                  TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
 375     }
 376   else
 377     {
 378       if (bfd_big_endian (abfd)
 379           ? TARGET_BYTE_ORDER != BIG_ENDIAN
 380           : TARGET_BYTE_ORDER == BIG_ENDIAN)
 381         warning ("%s endian file does not match %s endian target.",
 382                  bfd_big_endian (abfd) ? "big" : "little",
 383                  TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little");
 384     }
 385 }
 386
 387
 388 /* Functions to manipulate the architecture of the target */
 389
 390 enum set_arch { set_arch_auto, set_arch_manual };
 391
 392 int target_architecture_auto = 1;
 393
 394 const char *set_architecture_string;
 395
 396 /* Old way of changing the current architecture. */
 397
 398 extern const struct bfd_arch_info bfd_default_arch_struct;
 399 const struct bfd_arch_info *target_architecture = &bfd_default_arch_struct;
 400 int (*target_architecture_hook) (const struct bfd_arch_info *ap);
 401
 402 static int
 403 arch_ok (const struct bfd_arch_info *arch)
 404 {
 405   if (GDB_MULTI_ARCH)
 406     internal_error ("arch_ok: not multi-arched");
 407   /* Should be performing the more basic check that the binary is
 408      compatible with GDB. */
 409   /* Check with the target that the architecture is valid. */
 410   return (target_architecture_hook == NULL
 411           || target_architecture_hook (arch));
 412 }
 413
 414 static void
 415 set_arch (const struct bfd_arch_info *arch,
 416           enum set_arch type)
 417 {
 418   if (GDB_MULTI_ARCH)
 419     internal_error ("set_arch: not multi-arched");
 420   switch (type)
 421     {
 422     case set_arch_auto:
 423       if (!arch_ok (arch))
 424         warning ("Target may not support %s architecture",
 425                  arch->printable_name);
 426       target_architecture = arch;
 427       break;
 428     case set_arch_manual:
 429       if (!arch_ok (arch))
 430         {
 431           printf_unfiltered ("Target does not support `%s' architecture.\n",
 432                              arch->printable_name);
 433         }
 434       else
 435         {
 436           target_architecture_auto = 0;
 437           target_architecture = arch;
 438         }
 439       break;
 440     }
 441   if (gdbarch_debug)
 442     gdbarch_dump (current_gdbarch, gdb_stdlog);
 443 }
 444
 445 /* Set the architecture from arch/machine (deprecated) */
 446
 447 void
 448 set_architecture_from_arch_mach (enum bfd_architecture arch,
 449                                  unsigned long mach)
 450 {
 451   const struct bfd_arch_info *wanted = bfd_lookup_arch (arch, mach);
 452   if (GDB_MULTI_ARCH)
 453     internal_error ("set_architecture_from_arch_mach: not multi-arched");
 454   if (wanted != NULL)
 455     set_arch (wanted, set_arch_manual);
 456   else
 457     internal_error ("gdbarch: hardwired architecture/machine not recognized");
 458 }
 459
 460 /* Set the architecture from a BFD (deprecated) */
 461
 462 static void
 463 set_architecture_from_file (bfd *abfd)
 464 {
 465   const struct bfd_arch_info *wanted = bfd_get_arch_info (abfd);
 466   if (GDB_MULTI_ARCH)
 467     internal_error ("set_architecture_from_file: not multi-arched");
 468   if (target_architecture_auto)
 469     {
 470       set_arch (wanted, set_arch_auto);
 471     }
 472   else if (wanted != target_architecture)
 473     {
 474       warning ("%s architecture file may be incompatible with %s target.",
 475                wanted->printable_name,
 476                target_architecture->printable_name);
 477     }
 478 }
 479
 480
 481 /* Called if the user enters ``show architecture'' without an
 482    argument. */
 483
 484 static void
 485 show_architecture (char *args, int from_tty)
 486 {
 487   const char *arch;
 488   arch = TARGET_ARCHITECTURE->printable_name;
 489   if (target_architecture_auto)
 490     printf_filtered ("The target architecture is set automatically (currently %s)\n", arch);
 491   else
 492     printf_filtered ("The target architecture is assumed to be %s\n", arch);
 493 }
 494
 495
 496 /* Called if the user enters ``set architecture'' with or without an
 497    argument. */
 498
 499 static void
 500 set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
 501 {
 502   if (strcmp (set_architecture_string, "auto") == 0)
 503     {
 504       target_architecture_auto = 1;
 505     }
 506   else if (GDB_MULTI_ARCH)
 507     {
 508       struct gdbarch_info info;
 509       memset (&info, 0, sizeof info);
 510       info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
 511       if (info.bfd_arch_info == NULL)
 512         internal_error ("set_architecture: bfd_scan_arch failed");
 513       if (gdbarch_update_p (info))
 514         target_architecture_auto = 0;
 515       else
 516         printf_unfiltered ("Architecture `%s' not recognized.\n",
 517                            set_architecture_string);
 518     }
 519   else
 520     {
 521       const struct bfd_arch_info *arch
 522         = bfd_scan_arch (set_architecture_string);
 523       if (arch == NULL)
 524         internal_error ("set_architecture: bfd_scan_arch failed");
 525       set_arch (arch, set_arch_manual);
 526     }
 527   show_architecture (NULL, from_tty);
 528 }
 529
 530 /* Called if the user enters ``info architecture'' without an argument. */
 531
 532 static void
 533 info_architecture (char *args, int from_tty)
 534 {
 535   printf_filtered ("Available architectures are:\n");
 536   if (GDB_MULTI_ARCH)
 537     {
 538       const char **arches = gdbarch_printable_names ();
 539       const char **arch;
 540       for (arch = arches; *arch != NULL; arch++)
 541         {
 542           printf_filtered (" %s", *arch);
 543         }
 544       xfree (arches);
 545     }
 546   else
 547     {
 548       enum bfd_architecture a;
 549       for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
 550         {
 551           const struct bfd_arch_info *ap;
 552           for (ap = bfd_lookup_arch (a, 0);
 553                ap != NULL;
 554                ap = ap->next)
 555             {
 556               printf_filtered (" %s", ap->printable_name);
 557               ap = ap->next;
 558             }
 559         }
 560     }
 561   printf_filtered ("\n");
 562 }
 563
 564 /* Set the dynamic target-system-dependent parameters (architecture,
 565    byte-order) using information found in the BFD */
 566
 567 void
 568 set_gdbarch_from_file (bfd *abfd)
 569 {
 570   if (GDB_MULTI_ARCH)
 571     {
 572       struct gdbarch_info info;
 573       memset (&info, 0, sizeof info);
 574       info.abfd = abfd;
 575       if (! gdbarch_update_p (info))
 576         error ("Architecture of file not recognized.\n");
 577     }
 578   else
 579     {
 580       set_architecture_from_file (abfd);
 581       set_endian_from_file (abfd);
 582     }
 583 }
 584
 585 /* Initialize the current architecture.  Update the ``set
 586    architecture'' command so that it specifies a list of valid
 587    architectures.  */
 588
 589 #ifdef DEFAULT_BFD_ARCH
 590 extern const bfd_arch_info_type DEFAULT_BFD_ARCH;
 591 static const bfd_arch_info_type *default_bfd_arch = &DEFAULT_BFD_ARCH;
 592 #else
 593 static const bfd_arch_info_type *default_bfd_arch;
 594 #endif
 595
 596 #ifdef DEFAULT_BFD_VEC
 597 extern const bfd_target DEFAULT_BFD_VEC;
 598 static const bfd_target *default_bfd_vec = &DEFAULT_BFD_VEC;
 599 #else
 600 static const bfd_target *default_bfd_vec;
 601 #endif
 602
 603 void
 604 initialize_current_architecture (void)
 605 {
 606   const char **arches = gdbarch_printable_names ();
 607
 608   /* determine a default architecture and byte order. */
 609   struct gdbarch_info info;
 610   memset (&info, 0, sizeof (info));
 611
 612   /* Find a default architecture. */
 613   if (info.bfd_arch_info == NULL
 614       && default_bfd_arch != NULL)
 615     info.bfd_arch_info = default_bfd_arch;
 616   if (info.bfd_arch_info == NULL)
 617     {
 618       /* Choose the architecture by taking the first one
 619          alphabetically. */
 620       const char *chosen = arches[0];
 621       const char **arch;
 622       for (arch = arches; *arch != NULL; arch++)
 623         {
 624           if (strcmp (*arch, chosen) < 0)
 625             chosen = *arch;
 626         }
 627       if (chosen == NULL)
 628         internal_error ("initialize_current_architecture: No arch");
 629       info.bfd_arch_info = bfd_scan_arch (chosen);
 630       if (info.bfd_arch_info == NULL)
 631         internal_error ("initialize_current_architecture: Arch not found");
 632     }
 633
 634   /* take several guesses at a byte order. */
 635   /* NB: can't use TARGET_BYTE_ORDER_DEFAULT as its definition is
 636      forced above. */
 637   if (info.byte_order == 0
 638       && default_bfd_vec != NULL)
 639     {
 640       /* Extract BFD's default vector's byte order. */
 641       switch (default_bfd_vec->byteorder)
 642         {
 643         case BFD_ENDIAN_BIG:
 644           info.byte_order = BIG_ENDIAN;
 645           break;
 646         case BFD_ENDIAN_LITTLE:
 647           info.byte_order = LITTLE_ENDIAN;
 648           break;
 649         default:
 650           break;
 651         }
 652     }
 653   if (info.byte_order == 0)
 654     {
 655       /* look for ``*el-*'' in the target name. */
 656       const char *chp;
 657       chp = strchr (target_name, '-');
 658       if (chp != NULL
 659           && chp - 2 >= target_name
 660           && strncmp (chp - 2, "el", 2) == 0)
 661         info.byte_order = LITTLE_ENDIAN;
 662     }
 663   if (info.byte_order == 0)
 664     {
 665       /* Wire it to big-endian!!! */
 666       info.byte_order = BIG_ENDIAN;
 667     }
 668
 669   if (GDB_MULTI_ARCH)
 670     {
 671       if (! gdbarch_update_p (info))
 672         {
 673           internal_error ("initialize_current_architecture: Selection of initial architecture failed");
 674         }
 675     }
 676
 677   /* Create the ``set architecture'' command appending ``auto'' to the
 678      list of architectures. */
 679   {
 680     struct cmd_list_element *c;
 681     /* Append ``auto''. */
 682     int nr;
 683     for (nr = 0; arches[nr] != NULL; nr++);
 684     arches = xrealloc (arches, sizeof (char*) * (nr + 2));
 685     arches[nr + 0] = "auto";
 686     arches[nr + 1] = NULL;
 687     /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead
 688        of ``const char *''.  We just happen to know that the casts are
 689        safe. */
 690     c = add_set_enum_cmd ("architecture", class_support,
 691                           arches, &set_architecture_string,
 692                           "Set architecture of target.",
 693                           &setlist);
 694     c->function.sfunc = set_architecture;
 695     add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
 696     /* Don't use set_from_show - need to print both auto/manual and
 697        current setting. */
 698     add_cmd ("architecture", class_support, show_architecture,
 699              "Show the current target architecture", &showlist);
 700     c = add_cmd ("architecture", class_support, info_architecture,
 701                  "List supported target architectures", &infolist);
 702     deprecate_cmd (c, "set architecture");
 703   }
 704 }
 705
 706
 707 /* */
 708
 709 extern initialize_file_ftype _initialize_gdbarch_utils;
 710
 711 void
 712 _initialize_gdbarch_utils (void)
 713 {
 714   struct cmd_list_element *c;
 715   c = add_set_enum_cmd ("endian", class_support,
 716                         endian_enum, &set_endian_string,
 717                         "Set endianness of target.",
 718                         &setlist);
 719   c->function.sfunc = set_endian;
 720   /* Don't use set_from_show - need to print both auto/manual and
 721      current setting. */
 722   add_cmd ("endian", class_support, show_endian,
 723            "Show the current byte-order", &showlist);
 724 }