gas/as.h

   1 /* as.h - global header file
   2    Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GAS, the GNU Assembler.
   7
   8    GAS is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    GAS is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GAS; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #ifndef GAS
  24 #define GAS 1
  25 /* I think this stuff is largely out of date.  xoxorich.
  26
  27    CAPITALISED names are #defined.
  28    "lowercaseH" is #defined if "lowercase.h" has been #include-d.
  29    "lowercaseT" is a typedef of "lowercase" objects.
  30    "lowercaseP" is type "pointer to object of type 'lowercase'".
  31    "lowercaseS" is typedef struct ... lowercaseS.
  32
  33    #define DEBUG to enable all the "know" assertion tests.
  34    #define SUSPECT when debugging hash code.
  35    #define COMMON as "extern" for all modules except one, where you #define
  36         COMMON as "".
  37    If TEST is #defined, then we are testing a module: #define COMMON as "".  */
  38
  39 #include "config.h"
  40
  41 /* This is the code recommended in the autoconf documentation, almost
  42    verbatim.  If it doesn't work for you, let me know, and notify
  43    djm@gnu.ai.mit.edu as well.  */
  44 /* Added void* version for STDC case.  This is to be compatible with
  45    the declaration in bison.simple, used for m68k operand parsing.
  46    --KR 1995.08.08 */
  47 /* Force void* decl for hpux.  This is what Bison uses.  --KR 1995.08.16 */
  48
  49 #ifndef __GNUC__
  50 # if HAVE_ALLOCA_H
  51 #  include <alloca.h>
  52 # else
  53 #  ifdef _AIX
  54 /* Indented so that pre-ansi C compilers will ignore it, rather than
  55    choke on it.  Some versions of AIX require this to be the first
  56    thing in the file.  */
  57  #pragma alloca
  58 #  else
  59 #   ifndef alloca /* predefined by HP cc +Olibcalls */
  60 #    if !defined (__STDC__) && !defined (__hpux)
  61 extern char *alloca ();
  62 #    else
  63 extern void *alloca ();
  64 #    endif /* __STDC__, __hpux */
  65 #   endif /* alloca */
  66 #  endif /* _AIX */
  67 # endif /* HAVE_ALLOCA_H */
  68 #endif /* __GNUC__ */
  69
  70 /* Prefer varargs for non-ANSI compiler, since some will barf if the
  71    ellipsis definition is used with a no-arguments declaration.  */
  72 #if defined (HAVE_VARARGS_H) && !defined (__STDC__)
  73 #undef HAVE_STDARG_H
  74 #endif
  75
  76 #if defined (HAVE_STDARG_H)
  77 #define USE_STDARG
  78 #endif
  79 #if !defined (USE_STDARG) && defined (HAVE_VARARGS_H)
  80 #define USE_VARARGS
  81 #endif
  82
  83 /* Now, tend to the rest of the configuration.  */
  84
  85 /* System include files first...  */
  86 #include <stdio.h>
  87 #ifdef HAVE_STRING_H
  88 #include <string.h>
  89 #else
  90 #ifdef HAVE_STRINGS_H
  91 #include <strings.h>
  92 #endif
  93 #endif
  94 #ifdef HAVE_STDLIB_H
  95 #include <stdlib.h>
  96 #endif
  97 #ifdef HAVE_UNISTD_H
  98 #include <unistd.h>
  99 #endif
 100 #ifdef HAVE_SYS_TYPES_H
 101 /* for size_t, pid_t */
 102 #include <sys/types.h>
 103 #endif
 104
 105 #ifdef HAVE_ERRNO_H
 106 #include <errno.h>
 107 #endif
 108
 109 #ifdef USE_STDARG
 110 #include <stdarg.h>
 111 #endif
 112
 113 #ifdef USE_VARARGS
 114 #include <varargs.h>
 115 #endif
 116
 117 #if !defined (USE_STDARG) && !defined (USE_VARARGS)
 118 /* Roll our own.  */
 119 #define va_alist REST
 120 #define va_dcl
 121 typedef int * va_list;
 122 #define va_start(ARGS)  ARGS = &REST
 123 #define va_end(ARGS)
 124 #endif
 125
 126 #include "getopt.h"
 127 /* The first getopt value for machine-independent long options.
 128    150 isn't special; it's just an arbitrary non-ASCII char value.  */
 129 #define OPTION_STD_BASE 150
 130 /* The first getopt value for machine-dependent long options.
 131    190 gives the standard options room to grow.  */
 132 #define OPTION_MD_BASE 190
 133
 134 #ifdef DEBUG
 135 #undef NDEBUG
 136 #endif
 137 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 138 #define __PRETTY_FUNCTION__  ((char*)0)
 139 #endif
 140 #define assert(P) \
 141   ((void) ((P) ? 0 : (as_assert (__FILE__, __LINE__, __PRETTY_FUNCTION__), 0)))
 142 #undef abort
 143 #define abort()         as_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 144
 145 /* Now GNU header files...  */
 146 #include "ansidecl.h"
 147 #include "bfd.h"
 148 #include "libiberty.h"
 149
 150 /* Define the standard progress macros.  */
 151 #include "progress.h"
 152
 153 /* This doesn't get taken care of anywhere.  */
 154 #ifndef __MWERKS__  /* Metrowerks C chokes on the "defined (inline)"  */
 155 #if !defined (__GNUC__) && !defined (inline)
 156 #define inline
 157 #endif
 158 #endif /* !__MWERKS__ */
 159
 160 /* Other stuff from config.h.  */
 161 #ifdef NEED_DECLARATION_ENVIRON
 162 extern char **environ;
 163 #endif
 164 #ifdef NEED_DECLARATION_ERRNO
 165 extern int errno;
 166 #endif
 167 #ifdef NEED_DECLARATION_FFS
 168 extern int ffs (int);
 169 #endif
 170 #ifdef NEED_DECLARATION_FREE
 171 extern void free ();
 172 #endif
 173 #ifdef NEED_DECLARATION_MALLOC
 174 extern PTR malloc ();
 175 extern PTR realloc ();
 176 #endif
 177 #ifdef NEED_DECLARATION_STRSTR
 178 extern char *strstr ();
 179 #endif
 180
 181 #if !HAVE_DECL_VSNPRINTF
 182 extern int vsnprintf(char *, size_t, const char *, va_list);
 183 #endif
 184
 185 /* This is needed for VMS.  */
 186 #if ! defined (HAVE_UNLINK) && defined (HAVE_REMOVE)
 187 #define unlink remove
 188 #endif
 189
 190 /* Hack to make "gcc -Wall" not complain about obstack macros.  */
 191 #if !defined (memcpy) && !defined (bcopy)
 192 #define bcopy(src,dest,size)    memcpy (dest, src, size)
 193 #endif
 194
 195 /* Make Saber happier on obstack.h.  */
 196 #ifdef SABER
 197 #undef  __PTR_TO_INT
 198 #define __PTR_TO_INT(P) ((int) (P))
 199 #undef  __INT_TO_PTR
 200 #define __INT_TO_PTR(P) ((char *) (P))
 201 #endif
 202
 203 #ifndef __LINE__
 204 #define __LINE__ "unknown"
 205 #endif /* __LINE__ */
 206
 207 #ifndef __FILE__
 208 #define __FILE__ "unknown"
 209 #endif /* __FILE__ */
 210
 211 #ifndef FOPEN_WB
 212 #ifdef USE_BINARY_FOPEN
 213 #include "fopen-bin.h"
 214 #else
 215 #include "fopen-same.h"
 216 #endif
 217 #endif
 218
 219 #ifndef EXIT_SUCCESS
 220 #define EXIT_SUCCESS 0
 221 #define EXIT_FAILURE 1
 222 #endif
 223
 224 #ifndef SEEK_SET
 225 #define SEEK_SET 0
 226 #endif
 227
 228 #define obstack_chunk_alloc xmalloc
 229 #define obstack_chunk_free xfree
 230
 231 #define xfree free
 232
 233 #include "asintl.h"
 234
 235 #define BAD_CASE(val)                                                       \
 236   {                                                                         \
 237     as_fatal (_("Case value %ld unexpected at line %d of file \"%s\"\n"),   \
 238               (long) val, __LINE__, __FILE__);                              \
 239   }
 240 \f
 241 #include "flonum.h"
 242
 243 /* These are assembler-wide concepts */
 244
 245 extern bfd *stdoutput;
 246 typedef bfd_vma addressT;
 247 typedef bfd_signed_vma offsetT;
 248
 249 /* Type of symbol value, etc.  For use in prototypes.  */
 250 typedef addressT valueT;
 251
 252 #ifndef COMMON
 253 #ifdef TEST
 254 #define COMMON                  /* Declare our COMMONs storage here.  */
 255 #else
 256 #define COMMON extern           /* Our commons live elsewhere.  */
 257 #endif
 258 #endif
 259 /* COMMON now defined */
 260
 261 #ifdef DEBUG
 262 #ifndef know
 263 #define know(p) assert(p)       /* Verify our assumptions!  */
 264 #endif /* not yet defined */
 265 #else
 266 #define know(p)                 /* know() checks are no-op.ed  */
 267 #endif
 268 \f
 269 /* input_scrub.c */
 270
 271 /* Supplies sanitised buffers to read.c.
 272    Also understands printing line-number part of error messages.  */
 273 \f
 274 /* subsegs.c     Sub-segments. Also, segment(=expression type)s.*/
 275
 276 typedef asection *segT;
 277 #define SEG_NORMAL(SEG)         (   (SEG) != absolute_section   \
 278                                  && (SEG) != undefined_section  \
 279                                  && (SEG) != reg_section        \
 280                                  && (SEG) != expr_section)
 281 typedef int subsegT;
 282
 283 /* What subseg we are accessing now?  */
 284 COMMON subsegT now_subseg;
 285
 286 /* Segment our instructions emit to.  */
 287 COMMON segT now_seg;
 288
 289 #define segment_name(SEG)       bfd_get_section_name (stdoutput, SEG)
 290
 291 extern segT reg_section, expr_section;
 292 /* Shouldn't these be eliminated someday?  */
 293 extern segT text_section, data_section, bss_section;
 294 #define absolute_section        bfd_abs_section_ptr
 295 #define undefined_section       bfd_und_section_ptr
 296
 297 enum _relax_state
 298 {
 299   /* Dummy frag used by listing code.  */
 300   rs_dummy = 0,
 301
 302   /* Variable chars to be repeated fr_offset times.
 303      Fr_symbol unused. Used with fr_offset == 0 for a
 304      constant length frag.  */
 305   rs_fill,
 306
 307   /* Align.  The fr_offset field holds the power of 2 to which to
 308      align.  The fr_var field holds the number of characters in the
 309      fill pattern.  The fr_subtype field holds the maximum number of
 310      bytes to skip when aligning, or 0 if there is no maximum.  */
 311   rs_align,
 312
 313   /* Align code.  The fr_offset field holds the power of 2 to which
 314      to align.  This type is only generated by machine specific
 315      code, which is normally responsible for handling the fill
 316      pattern.  The fr_subtype field holds the maximum number of
 317      bytes to skip when aligning, or 0 if there is no maximum.  */
 318   rs_align_code,
 319
 320   /* Test for alignment.  Like rs_align, but used by several targets
 321      to warn if data is not properly aligned.  */
 322   rs_align_test,
 323
 324   /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
 325      character.  */
 326   rs_org,
 327
 328 #ifndef WORKING_DOT_WORD
 329   /* JF: gunpoint */
 330   rs_broken_word,
 331 #endif
 332
 333   /* Machine specific relaxable (or similarly alterable) instruction.  */
 334   rs_machine_dependent,
 335
 336   /* .space directive with expression operand that needs to be computed
 337      later.  Similar to rs_org, but different.
 338      fr_symbol: operand
 339      1 variable char: fill character  */
 340   rs_space,
 341
 342   /* A DWARF leb128 value; only ELF uses this.  The subtype is 0 for
 343      unsigned, 1 for signed.  */
 344   rs_leb128,
 345
 346   /* Exception frame information which we may be able to optimize.  */
 347   rs_cfa,
 348
 349   /* Cross-fragment dwarf2 line number optimization.  */
 350   rs_dwarf2dbg
 351 };
 352
 353 typedef enum _relax_state relax_stateT;
 354
 355 /* This type is used in prototypes, so it can't be a type that will be
 356    widened for argument passing.  */
 357 typedef unsigned int relax_substateT;
 358
 359 /* Enough bits for address, but still an integer type.
 360    Could be a problem, cross-assembling for 64-bit machines.  */
 361 typedef addressT relax_addressT;
 362
 363 struct relax_type
 364 {
 365   /* Forward reach. Signed number. > 0.  */
 366   offsetT rlx_forward;
 367   /* Backward reach. Signed number. < 0.  */
 368   offsetT rlx_backward;
 369
 370   /* Bytes length of this address.  */
 371   unsigned char rlx_length;
 372
 373   /* Next longer relax-state.  0 means there is no 'next' relax-state.  */
 374   relax_substateT rlx_more;
 375 };
 376
 377 typedef struct relax_type relax_typeS;
 378 \f
 379 /* main program "as.c" (command arguments etc).  */
 380
 381 COMMON unsigned char flag_no_comments; /* -f */
 382 COMMON unsigned char flag_debug; /* -D */
 383 COMMON unsigned char flag_signed_overflow_ok; /* -J */
 384 #ifndef WORKING_DOT_WORD
 385 COMMON unsigned char flag_warn_displacement; /* -K */
 386 #endif
 387
 388 /* True if local symbols should be retained.  */
 389 COMMON int flag_keep_locals; /* -L */
 390
 391 /* True if we are assembling in MRI mode.  */
 392 COMMON int flag_mri;
 393
 394 /* Should the data section be made read-only and appended to the text
 395    section?  */
 396 COMMON unsigned char flag_readonly_data_in_text; /* -R */
 397
 398 /* True if warnings should be inhibited.  */
 399 COMMON int flag_no_warnings; /* -W */
 400
 401 /* True if warnings count as errors.  */
 402 COMMON int flag_fatal_warnings; /* --fatal-warnings */
 403
 404 /* True if we should attempt to generate output even if non-fatal errors
 405    are detected.  */
 406 COMMON unsigned char flag_always_generate_output; /* -Z */
 407
 408 /* This is true if the assembler should output time and space usage.  */
 409 COMMON unsigned char flag_print_statistics;
 410
 411 /* True if local absolute symbols are to be stripped.  */
 412 COMMON int flag_strip_local_absolute;
 413
 414 /* True if we should generate a traditional format object file.  */
 415 COMMON int flag_traditional_format;
 416
 417 /* TRUE if .note.GNU-stack section with SEC_CODE should be created */
 418 COMMON int flag_execstack;
 419
 420 /* TRUE if .note.GNU-stack section with SEC_CODE should be created */
 421 COMMON int flag_noexecstack;
 422
 423 /* name of emitted object file */
 424 COMMON char *out_file_name;
 425
 426 /* name of file defining extensions to the basic instruction set */
 427 COMMON char *insttbl_file_name;
 428
 429 /* TRUE if we need a second pass.  */
 430 COMMON int need_pass_2;
 431
 432 /* TRUE if we should do no relaxing, and
 433    leave lots of padding.  */
 434 COMMON int linkrelax;
 435
 436 /* TRUE if we should produce a listing.  */
 437 extern int listing;
 438
 439 /* Type of debugging information we should generate.  We currently support
 440    stabs, ECOFF, and DWARF2.
 441
 442    NOTE!  This means debug information about the assembly source code itself
 443    and _not_ about possible debug information from a high-level language.
 444    This is especially relevant to DWARF2, since the compiler may emit line
 445    number directives that the assembler resolves.  */
 446
 447 enum debug_info_type
 448 {
 449   DEBUG_UNSPECIFIED,
 450   DEBUG_NONE,
 451   DEBUG_STABS,
 452   DEBUG_ECOFF,
 453   DEBUG_DWARF,
 454   DEBUG_DWARF2
 455 };
 456
 457 extern enum debug_info_type debug_type;
 458 extern int use_gnu_debug_info_extensions;
 459 \f
 460 /* Maximum level of macro nesting.  */
 461 extern int max_macro_nest;
 462
 463 /* Verbosity level.  */
 464 extern int verbose;
 465
 466 /* Obstack chunk size.  Keep large for efficient space use, make small to
 467    increase malloc calls for monitoring memory allocation.  */
 468 extern int chunksize;
 469
 470 struct _pseudo_type
 471 {
 472   /* assembler mnemonic, lower case, no '.' */
 473   const char *poc_name;
 474   /* Do the work */
 475   void (*poc_handler) (int);
 476   /* Value to pass to handler */
 477   int poc_val;
 478 };
 479
 480 typedef struct _pseudo_type pseudo_typeS;
 481
 482 #ifdef USE_STDARG
 483 #if (__GNUC__ >= 2) && !defined(VMS)
 484 /* for use with -Wformat */
 485
 486 #if __GNUC__ == 2 && __GNUC_MINOR__ < 6
 487 /* Support for double underscores in attribute names was added in gcc
 488    2.6, so avoid them if we are using an earlier version.  */
 489 #define __printf__ printf
 490 #define __format__ format
 491 #endif
 492
 493 #define PRINTF_LIKE(FCN) \
 494   void FCN (const char *format, ...) \
 495     __attribute__ ((__format__ (__printf__, 1, 2)))
 496 #define PRINTF_WHERE_LIKE(FCN) \
 497   void FCN (char *file, unsigned int line, const char *format, ...) \
 498     __attribute__ ((__format__ (__printf__, 3, 4)))
 499
 500 #else /* __GNUC__ < 2 || defined(VMS) */
 501
 502 #define PRINTF_LIKE(FCN)        void FCN (const char *format, ...)
 503 #define PRINTF_WHERE_LIKE(FCN)  void FCN (char *file, \
 504                                           unsigned int line, \
 505                                           const char *format, ...)
 506
 507 #endif /* __GNUC__ < 2 || defined(VMS) */
 508
 509 #else /* ! USE_STDARG */
 510
 511 #define PRINTF_LIKE(FCN)        void FCN ()
 512 #define PRINTF_WHERE_LIKE(FCN)  void FCN ()
 513
 514 #endif /* ! USE_STDARG */
 515
 516 PRINTF_LIKE (as_bad);
 517 PRINTF_LIKE (as_fatal) ATTRIBUTE_NORETURN;
 518 PRINTF_LIKE (as_tsktsk);
 519 PRINTF_LIKE (as_warn);
 520 PRINTF_WHERE_LIKE (as_bad_where);
 521 PRINTF_WHERE_LIKE (as_warn_where);
 522
 523 void   as_assert (const char *, int, const char *);
 524 void   as_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 525 void   sprint_value (char *, addressT);
 526 int    had_errors (void);
 527 int    had_warnings (void);
 528 void   as_warn_value_out_of_range (char *, offsetT, offsetT, offsetT, char *, unsigned);
 529 void   as_bad_value_out_of_range (char *, offsetT, offsetT, offsetT, char *, unsigned);
 530 void   print_version_id (void);
 531 char * app_push (void);
 532 char * atof_ieee (char *, int, LITTLENUM_TYPE *);
 533 char * input_scrub_include_file (char *, char *);
 534 void   input_scrub_insert_line (const char *);
 535 void   input_scrub_insert_file (char *);
 536 char * input_scrub_new_file (char *);
 537 char * input_scrub_next_buffer (char **bufp);
 538 int    do_scrub_chars (int (*get) (char *, int), char *, int);
 539 int    gen_to_words (LITTLENUM_TYPE *, int, long);
 540 int    had_err (void);
 541 int    ignore_input (void);
 542 void   cond_finish_check (int);
 543 void   cond_exit_macro (int);
 544 int    seen_at_least_1_file (void);
 545 void   app_pop (char *);
 546 void   as_where (char **, unsigned int *);
 547 void   bump_line_counters (void);
 548 void   do_scrub_begin (int);
 549 void   input_scrub_begin (void);
 550 void   input_scrub_close (void);
 551 void   input_scrub_end (void);
 552 int    new_logical_line (char *, int);
 553 int    new_logical_line_flags (char *, int, int);
 554 void   subsegs_begin (void);
 555 void   subseg_change (segT, int);
 556 segT   subseg_new (const char *, subsegT);
 557 segT   subseg_force_new (const char *, subsegT);
 558 void   subseg_set (segT, subsegT);
 559 int    subseg_text_p (segT);
 560 int    seg_not_empty_p (segT);
 561 void   start_dependencies (char *);
 562 void   register_dependency (char *);
 563 void   print_dependencies (void);
 564 segT   subseg_get (const char *, int);
 565
 566 struct expressionS;
 567 struct fix;
 568 typedef struct symbol symbolS;
 569 struct relax_type;
 570 typedef struct frag fragS;
 571
 572 /* literal.c */
 573 valueT add_to_literal_pool (symbolS *, valueT, segT, int);
 574
 575 int check_eh_frame (struct expressionS *, unsigned int *);
 576 int eh_frame_estimate_size_before_relax (fragS *);
 577 int eh_frame_relax_frag (fragS *);
 578 void eh_frame_convert_frag (fragS *);
 579 int generic_force_reloc (struct fix *);
 580
 581 #include "expr.h"               /* Before targ-*.h */
 582
 583 /* This one starts the chain of target dependant headers.  */
 584 #include "targ-env.h"
 585
 586 #ifdef OBJ_MAYBE_ELF
 587 #define IS_ELF (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 588 #else
 589 #ifdef OBJ_ELF
 590 #define IS_ELF 1
 591 #else
 592 #define IS_ELF 0
 593 #endif
 594 #endif
 595
 596 #include "write.h"
 597 #include "frags.h"
 598 #include "hash.h"
 599 #include "read.h"
 600 #include "symbols.h"
 601
 602 #include "tc.h"
 603 #include "obj.h"
 604
 605 #ifdef USE_EMULATIONS
 606 #include "emul.h"
 607 #endif
 608 #include "listing.h"
 609
 610 #ifdef TC_M68K
 611 /* True if we are assembling in m68k MRI mode.  */
 612 COMMON int flag_m68k_mri;
 613 #define DOLLAR_AMBIGU flag_m68k_mri
 614 #else
 615 #define flag_m68k_mri 0
 616 #endif
 617
 618 #ifdef WARN_COMMENTS
 619 COMMON int           warn_comment;
 620 COMMON unsigned int  found_comment;
 621 COMMON char *        found_comment_file;
 622 #endif
 623
 624 #ifndef DOLLAR_AMBIGU
 625 #define DOLLAR_AMBIGU 0
 626 #endif
 627
 628 #ifndef NUMBERS_WITH_SUFFIX
 629 #define NUMBERS_WITH_SUFFIX 0
 630 #endif
 631
 632 #ifndef LOCAL_LABELS_DOLLAR
 633 #define LOCAL_LABELS_DOLLAR 0
 634 #endif
 635
 636 #ifndef LOCAL_LABELS_FB
 637 #define LOCAL_LABELS_FB 0
 638 #endif
 639
 640 #ifndef LABELS_WITHOUT_COLONS
 641 #define LABELS_WITHOUT_COLONS 0
 642 #endif
 643
 644 #ifndef NO_PSEUDO_DOT
 645 #define NO_PSEUDO_DOT 0
 646 #endif
 647
 648 #ifndef TEXT_SECTION_NAME
 649 #define TEXT_SECTION_NAME       ".text"
 650 #define DATA_SECTION_NAME       ".data"
 651 #define BSS_SECTION_NAME        ".bss"
 652 #endif
 653
 654 #ifndef OCTETS_PER_BYTE_POWER
 655 #define OCTETS_PER_BYTE_POWER 0
 656 #endif
 657 #ifndef OCTETS_PER_BYTE
 658 #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
 659 #endif
 660 #if OCTETS_PER_BYTE != (1<<OCTETS_PER_BYTE_POWER)
 661  #error "Octets per byte conflicts with its power-of-two definition!"
 662 #endif
 663
 664 #endif /* GAS */