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
   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  25 /* I think this stuff is largely out of date.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 #include "bin-bugs.h"
  41
  42 /* This is the code recommended in the autoconf documentation, almost
  43    verbatim.  If it doesn't work for you, let me know, and notify
  44    djm@gnu.ai.mit.edu as well.  */
  45 /* Added void* version for STDC case.  This is to be compatible with
  46    the declaration in bison.simple, used for m68k operand parsing.
  47    --KR 1995.08.08 */
  48 /* Force void* decl for hpux.  This is what Bison uses.  --KR 1995.08.16 */
  49
  50 #ifndef __GNUC__
  51 # if HAVE_ALLOCA_H
  52 #  include <alloca.h>
  53 # else
  54 #  ifdef _AIX
  55 /* Indented so that pre-ansi C compilers will ignore it, rather than
  56    choke on it.  Some versions of AIX require this to be the first
  57    thing in the file.  */
  58  #pragma alloca
  59 #  else
  60 #   ifndef alloca /* predefined by HP cc +Olibcalls */
  61 #    if !defined (__STDC__) && !defined (__hpux)
  62 extern char *alloca ();
  63 #    else
  64 extern void *alloca ();
  65 #    endif /* __STDC__, __hpux */
  66 #   endif /* alloca */
  67 #  endif /* _AIX */
  68 # endif /* HAVE_ALLOCA_H */
  69 #endif /* __GNUC__ */
  70
  71 /* Prefer varargs for non-ANSI compiler, since some will barf if the
  72    ellipsis definition is used with a no-arguments declaration.  */
  73 #if defined (HAVE_VARARGS_H) && !defined (__STDC__)
  74 #undef HAVE_STDARG_H
  75 #endif
  76
  77 #if defined (HAVE_STDARG_H)
  78 #define USE_STDARG
  79 #endif
  80 #if !defined (USE_STDARG) && defined (HAVE_VARARGS_H)
  81 #define USE_VARARGS
  82 #endif
  83
  84 /* Now, tend to the rest of the configuration.  */
  85
  86 /* System include files first...  */
  87 #include <stdio.h>
  88 #ifdef HAVE_STRING_H
  89 #include <string.h>
  90 #else
  91 #ifdef HAVE_STRINGS_H
  92 #include <strings.h>
  93 #endif
  94 #endif
  95 #ifdef HAVE_STDLIB_H
  96 #include <stdlib.h>
  97 #endif
  98 #ifdef HAVE_UNISTD_H
  99 #include <unistd.h>
 100 #endif
 101 #ifdef HAVE_SYS_TYPES_H
 102 /* for size_t, pid_t */
 103 #include <sys/types.h>
 104 #endif
 105
 106 #ifdef HAVE_ERRNO_H
 107 #include <errno.h>
 108 #endif
 109
 110 #ifdef USE_STDARG
 111 #include <stdarg.h>
 112 #endif
 113
 114 #ifdef USE_VARARGS
 115 #include <varargs.h>
 116 #endif
 117
 118 #if !defined (USE_STDARG) && !defined (USE_VARARGS)
 119 /* Roll our own.  */
 120 #define va_alist REST
 121 #define va_dcl
 122 typedef int * va_list;
 123 #define va_start(ARGS)  ARGS = &REST
 124 #define va_end(ARGS)
 125 #endif
 126
 127 #include "getopt.h"
 128 /* The first getopt value for machine-independent long options.
 129    150 isn't special; it's just an arbitrary non-ASCII char value.  */
 130 #define OPTION_STD_BASE 150
 131 /* The first getopt value for machine-dependent long options.
 132    190 gives the standard options room to grow.  */
 133 #define OPTION_MD_BASE 190
 134
 135 #ifdef DEBUG
 136 #undef NDEBUG
 137 #endif
 138 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
 139 #define __PRETTY_FUNCTION__  ((char*)0)
 140 #endif
 141 #define assert(P) \
 142   ((void) ((P) ? 0 : (as_assert (__FILE__, __LINE__, __PRETTY_FUNCTION__), 0)))
 143 #undef abort
 144 #define abort()         as_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
 145
 146 /* Now GNU header files...  */
 147 #include "ansidecl.h"
 148 #include "bfd.h"
 149 #include "libiberty.h"
 150
 151 /* Define the standard progress macros.  */
 152 #include "progress.h"
 153
 154 /* This doesn't get taken care of anywhere.  */
 155 #ifndef __MWERKS__  /* Metrowerks C chokes on the "defined (inline)"  */
 156 #if !defined (__GNUC__) && !defined (inline)
 157 #define inline
 158 #endif
 159 #endif /* !__MWERKS__ */
 160
 161 /* Other stuff from config.h.  */
 162 #ifdef NEED_DECLARATION_ENVIRON
 163 extern char **environ;
 164 #endif
 165 #ifdef NEED_DECLARATION_ERRNO
 166 extern int errno;
 167 #endif
 168 #ifdef NEED_DECLARATION_FFS
 169 extern int ffs (int);
 170 #endif
 171 #ifdef NEED_DECLARATION_FREE
 172 extern void free ();
 173 #endif
 174 #ifdef NEED_DECLARATION_MALLOC
 175 extern PTR malloc ();
 176 extern PTR realloc ();
 177 #endif
 178 #ifdef NEED_DECLARATION_STRSTR
 179 extern char *strstr ();
 180 #endif
 181
 182 #if !HAVE_DECL_VSNPRINTF
 183 extern int vsnprintf(char *, size_t, const char *, va_list);
 184 #endif
 185
 186 /* This is needed for VMS.  */
 187 #if ! defined (HAVE_UNLINK) && defined (HAVE_REMOVE)
 188 #define unlink remove
 189 #endif
 190
 191 /* Hack to make "gcc -Wall" not complain about obstack macros.  */
 192 #if !defined (memcpy) && !defined (bcopy)
 193 #define bcopy(src,dest,size)    memcpy (dest, src, size)
 194 #endif
 195
 196 /* Make Saber happier on obstack.h.  */
 197 #ifdef SABER
 198 #undef  __PTR_TO_INT
 199 #define __PTR_TO_INT(P) ((int) (P))
 200 #undef  __INT_TO_PTR
 201 #define __INT_TO_PTR(P) ((char *) (P))
 202 #endif
 203
 204 #ifndef __LINE__
 205 #define __LINE__ "unknown"
 206 #endif /* __LINE__ */
 207
 208 #ifndef __FILE__
 209 #define __FILE__ "unknown"
 210 #endif /* __FILE__ */
 211
 212 #ifndef FOPEN_WB
 213 #ifdef USE_BINARY_FOPEN
 214 #include "fopen-bin.h"
 215 #else
 216 #include "fopen-same.h"
 217 #endif
 218 #endif
 219
 220 #ifndef EXIT_SUCCESS
 221 #define EXIT_SUCCESS 0
 222 #define EXIT_FAILURE 1
 223 #endif
 224
 225 #ifndef SEEK_SET
 226 #define SEEK_SET 0
 227 #endif
 228
 229 #define obstack_chunk_alloc xmalloc
 230 #define obstack_chunk_free xfree
 231
 232 #define xfree free
 233
 234 #include "asintl.h"
 235
 236 #define BAD_CASE(val)                                                       \
 237   {                                                                         \
 238     as_fatal (_("Case value %ld unexpected at line %d of file \"%s\"\n"),   \
 239               (long) val, __LINE__, __FILE__);                              \
 240   }
 241 \f
 242 #include "flonum.h"
 243
 244 /* These are assembler-wide concepts */
 245
 246 extern bfd *stdoutput;
 247 typedef bfd_vma addressT;
 248 typedef bfd_signed_vma offsetT;
 249
 250 /* Type of symbol value, etc.  For use in prototypes.  */
 251 typedef addressT valueT;
 252
 253 #ifndef COMMON
 254 #ifdef TEST
 255 #define COMMON                  /* Declare our COMMONs storage here.  */
 256 #else
 257 #define COMMON extern           /* Our commons live elsewhere.  */
 258 #endif
 259 #endif
 260 /* COMMON now defined */
 261
 262 #ifdef DEBUG
 263 #ifndef know
 264 #define know(p) assert(p)       /* Verify our assumptions!  */
 265 #endif /* not yet defined */
 266 #else
 267 #define know(p)                 /* know() checks are no-op.ed  */
 268 #endif
 269 \f
 270 /* input_scrub.c */
 271
 272 /* Supplies sanitised buffers to read.c.
 273    Also understands printing line-number part of error messages.  */
 274 \f
 275 /* subsegs.c     Sub-segments. Also, segment(=expression type)s.*/
 276
 277 typedef asection *segT;
 278 #define SEG_NORMAL(SEG)         (   (SEG) != absolute_section   \
 279                                  && (SEG) != undefined_section  \
 280                                  && (SEG) != reg_section        \
 281                                  && (SEG) != expr_section)
 282 typedef int subsegT;
 283
 284 /* What subseg we are accessing now?  */
 285 COMMON subsegT now_subseg;
 286
 287 /* Segment our instructions emit to.  */
 288 COMMON segT now_seg;
 289
 290 #define segment_name(SEG)       bfd_get_section_name (stdoutput, SEG)
 291
 292 extern segT reg_section, expr_section;
 293 /* Shouldn't these be eliminated someday?  */
 294 extern segT text_section, data_section, bss_section;
 295 #define absolute_section        bfd_abs_section_ptr
 296 #define undefined_section       bfd_und_section_ptr
 297
 298 enum _relax_state
 299 {
 300   /* Dummy frag used by listing code.  */
 301   rs_dummy = 0,
 302
 303   /* Variable chars to be repeated fr_offset times.
 304      Fr_symbol unused. Used with fr_offset == 0 for a
 305      constant length frag.  */
 306   rs_fill,
 307
 308   /* Align.  The fr_offset field holds the power of 2 to which to
 309      align.  The fr_var field holds the number of characters in the
 310      fill pattern.  The fr_subtype field holds the maximum number of
 311      bytes to skip when aligning, or 0 if there is no maximum.  */
 312   rs_align,
 313
 314   /* Align code.  The fr_offset field holds the power of 2 to which
 315      to align.  This type is only generated by machine specific
 316      code, which is normally responsible for handling the fill
 317      pattern.  The fr_subtype field holds the maximum number of
 318      bytes to skip when aligning, or 0 if there is no maximum.  */
 319   rs_align_code,
 320
 321   /* Test for alignment.  Like rs_align, but used by several targets
 322      to warn if data is not properly aligned.  */
 323   rs_align_test,
 324
 325   /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
 326      character.  */
 327   rs_org,
 328
 329 #ifndef WORKING_DOT_WORD
 330   /* JF: gunpoint */
 331   rs_broken_word,
 332 #endif
 333
 334   /* Machine specific relaxable (or similarly alterable) instruction.  */
 335   rs_machine_dependent,
 336
 337   /* .space directive with expression operand that needs to be computed
 338      later.  Similar to rs_org, but different.
 339      fr_symbol: operand
 340      1 variable char: fill character  */
 341   rs_space,
 342
 343   /* A DWARF leb128 value; only ELF uses this.  The subtype is 0 for
 344      unsigned, 1 for signed.  */
 345   rs_leb128,
 346
 347   /* Exception frame information which we may be able to optimize.  */
 348   rs_cfa,
 349
 350   /* Cross-fragment dwarf2 line number optimization.  */
 351   rs_dwarf2dbg
 352 };
 353
 354 typedef enum _relax_state relax_stateT;
 355
 356 /* This type is used in prototypes, so it can't be a type that will be
 357    widened for argument passing.  */
 358 typedef unsigned int relax_substateT;
 359
 360 /* Enough bits for address, but still an integer type.
 361    Could be a problem, cross-assembling for 64-bit machines.  */
 362 typedef addressT relax_addressT;
 363
 364 struct relax_type
 365 {
 366   /* Forward reach. Signed number. > 0.  */
 367   offsetT rlx_forward;
 368   /* Backward reach. Signed number. < 0.  */
 369   offsetT rlx_backward;
 370
 371   /* Bytes length of this address.  */
 372   unsigned char rlx_length;
 373
 374   /* Next longer relax-state.  0 means there is no 'next' relax-state.  */
 375   relax_substateT rlx_more;
 376 };
 377
 378 typedef struct relax_type relax_typeS;
 379 \f
 380 /* main program "as.c" (command arguments etc).  */
 381
 382 COMMON unsigned char flag_no_comments; /* -f */
 383 COMMON unsigned char flag_debug; /* -D */
 384 COMMON unsigned char flag_signed_overflow_ok; /* -J */
 385 #ifndef WORKING_DOT_WORD
 386 COMMON unsigned char flag_warn_displacement; /* -K */
 387 #endif
 388
 389 /* True if local symbols should be retained.  */
 390 COMMON int flag_keep_locals; /* -L */
 391
 392 /* True if we are assembling in MRI mode.  */
 393 COMMON int flag_mri;
 394
 395 /* Should the data section be made read-only and appended to the text
 396    section?  */
 397 COMMON unsigned char flag_readonly_data_in_text; /* -R */
 398
 399 /* True if warnings should be inhibited.  */
 400 COMMON int flag_no_warnings; /* -W */
 401
 402 /* True if warnings count as errors.  */
 403 COMMON int flag_fatal_warnings; /* --fatal-warnings */
 404
 405 /* True if we should attempt to generate output even if non-fatal errors
 406    are detected.  */
 407 COMMON unsigned char flag_always_generate_output; /* -Z */
 408
 409 /* This is true if the assembler should output time and space usage.  */
 410 COMMON unsigned char flag_print_statistics;
 411
 412 /* True if local absolute symbols are to be stripped.  */
 413 COMMON int flag_strip_local_absolute;
 414
 415 /* True if we should generate a traditional format object file.  */
 416 COMMON int flag_traditional_format;
 417
 418 /* TRUE if .note.GNU-stack section with SEC_CODE should be created */
 419 COMMON int flag_execstack;
 420
 421 /* TRUE if .note.GNU-stack section with SEC_CODE should be created */
 422 COMMON int flag_noexecstack;
 423
 424 /* name of emitted object file */
 425 COMMON char *out_file_name;
 426
 427 /* name of file defining extensions to the basic instruction set */
 428 COMMON char *insttbl_file_name;
 429
 430 /* TRUE if we need a second pass.  */
 431 COMMON int need_pass_2;
 432
 433 /* TRUE if we should do no relaxing, and
 434    leave lots of padding.  */
 435 COMMON int linkrelax;
 436
 437 /* TRUE if we should produce a listing.  */
 438 extern int listing;
 439
 440 /* Type of debugging information we should generate.  We currently support
 441    stabs, ECOFF, and DWARF2.
 442
 443    NOTE!  This means debug information about the assembly source code itself
 444    and _not_ about possible debug information from a high-level language.
 445    This is especially relevant to DWARF2, since the compiler may emit line
 446    number directives that the assembler resolves.  */
 447
 448 enum debug_info_type
 449 {
 450   DEBUG_UNSPECIFIED,
 451   DEBUG_NONE,
 452   DEBUG_STABS,
 453   DEBUG_ECOFF,
 454   DEBUG_DWARF,
 455   DEBUG_DWARF2
 456 };
 457
 458 extern enum debug_info_type debug_type;
 459 extern int use_gnu_debug_info_extensions;
 460 \f
 461 /* Maximum level of macro nesting.  */
 462 extern int max_macro_nest;
 463
 464 /* Verbosity level.  */
 465 extern int verbose;
 466
 467 /* Obstack chunk size.  Keep large for efficient space use, make small to
 468    increase malloc calls for monitoring memory allocation.  */
 469 extern int chunksize;
 470
 471 struct _pseudo_type
 472 {
 473   /* assembler mnemonic, lower case, no '.' */
 474   const char *poc_name;
 475   /* Do the work */
 476   void (*poc_handler) (int);
 477   /* Value to pass to handler */
 478   int poc_val;
 479 };
 480
 481 typedef struct _pseudo_type pseudo_typeS;
 482
 483 #ifdef USE_STDARG
 484 #if (__GNUC__ >= 2) && !defined(VMS)
 485 /* for use with -Wformat */
 486
 487 #if __GNUC__ == 2 && __GNUC_MINOR__ < 6
 488 /* Support for double underscores in attribute names was added in gcc
 489    2.6, so avoid them if we are using an earlier version.  */
 490 #define __printf__ printf
 491 #define __format__ format
 492 #endif
 493
 494 #define PRINTF_LIKE(FCN) \
 495   void FCN (const char *format, ...) \
 496     __attribute__ ((__format__ (__printf__, 1, 2)))
 497 #define PRINTF_WHERE_LIKE(FCN) \
 498   void FCN (char *file, unsigned int line, const char *format, ...) \
 499     __attribute__ ((__format__ (__printf__, 3, 4)))
 500
 501 #else /* __GNUC__ < 2 || defined(VMS) */
 502
 503 #define PRINTF_LIKE(FCN)        void FCN (const char *format, ...)
 504 #define PRINTF_WHERE_LIKE(FCN)  void FCN (char *file, \
 505                                           unsigned int line, \
 506                                           const char *format, ...)
 507
 508 #endif /* __GNUC__ < 2 || defined(VMS) */
 509
 510 #else /* ! USE_STDARG */
 511
 512 #define PRINTF_LIKE(FCN)        void FCN ()
 513 #define PRINTF_WHERE_LIKE(FCN)  void FCN ()
 514
 515 #endif /* ! USE_STDARG */
 516
 517 PRINTF_LIKE (as_bad);
 518 PRINTF_LIKE (as_fatal) ATTRIBUTE_NORETURN;
 519 PRINTF_LIKE (as_tsktsk);
 520 PRINTF_LIKE (as_warn);
 521 PRINTF_WHERE_LIKE (as_bad_where);
 522 PRINTF_WHERE_LIKE (as_warn_where);
 523
 524 void   as_assert (const char *, int, const char *);
 525 void   as_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
 526 void   sprint_value (char *, addressT);
 527 int    had_errors (void);
 528 int    had_warnings (void);
 529 void   as_warn_value_out_of_range (char *, offsetT, offsetT, offsetT, char *, unsigned);
 530 void   as_bad_value_out_of_range (char *, offsetT, offsetT, offsetT, char *, unsigned);
 531 void   print_version_id (void);
 532 char * app_push (void);
 533 char * atof_ieee (char *, int, LITTLENUM_TYPE *);
 534 char * input_scrub_include_file (char *, char *);
 535 void   input_scrub_insert_line (const char *);
 536 void   input_scrub_insert_file (char *);
 537 char * input_scrub_new_file (char *);
 538 char * input_scrub_next_buffer (char **bufp);
 539 int    do_scrub_chars (int (*get) (char *, int), char *, int);
 540 int    gen_to_words (LITTLENUM_TYPE *, int, long);
 541 int    had_err (void);
 542 int    ignore_input (void);
 543 void   cond_finish_check (int);
 544 void   cond_exit_macro (int);
 545 int    seen_at_least_1_file (void);
 546 void   app_pop (char *);
 547 void   as_where (char **, unsigned int *);
 548 void   bump_line_counters (void);
 549 void   do_scrub_begin (int);
 550 void   input_scrub_begin (void);
 551 void   input_scrub_close (void);
 552 void   input_scrub_end (void);
 553 int    new_logical_line (char *, 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 */