include/coff/xcoff.h

   1 /* Internal format of XCOFF object file data structures for BFD.
   2
   3    Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
   4    Free Software Foundation, Inc.
   5    Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   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 2 of the License, or
  12    (at your option) any later version.
  13
  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.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef _INTERNAL_XCOFF_H
  24 #define _INTERNAL_XCOFF_H
  25
  26 /* Linker */
  27
  28 /* Names of "special" sections.  */
  29 #define _TEXT   ".text"
  30 #define _DATA   ".data"
  31 #define _BSS    ".bss"
  32 #define _PAD    ".pad"
  33 #define _LOADER ".loader"
  34 #define _EXCEPT ".except"
  35 #define _TYPCHK ".typchk"
  36
  37 /* XCOFF uses a special .loader section with type STYP_LOADER.  */
  38 #define STYP_LOADER 0x1000
  39
  40 /* XCOFF uses a special .debug section with type STYP_DEBUG.  */
  41 #define STYP_DEBUG 0x2000
  42
  43 /* XCOFF handles line number or relocation overflow by creating
  44    another section header with STYP_OVRFLO set.  */
  45 #define STYP_OVRFLO 0x8000
  46
  47 /* Specifies an exception section.  A section of this type provides
  48    information to identify the reason that a trap or ececptin occured within
  49    and executable object program */
  50 #define STYP_EXCEPT 0x0100
  51
  52 /* Specifies a type check section.  A section of this type contains parameter
  53    argument type check strings used by the AIX binder.  */
  54 #define STYP_TYPCHK 0x4000
  55
  56 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
  57 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
  58 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
  59
  60 /* XCOFF relocation types.
  61    The relocations are described in the function
  62    xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c  */
  63
  64 #define R_POS   (0x00)
  65 #define R_NEG   (0x01)
  66 #define R_REL   (0x02)
  67 #define R_TOC   (0x03)
  68 #define R_RTB   (0x04)
  69 #define R_GL    (0x05)
  70 #define R_TCL   (0x06)
  71 #define R_BA    (0x08)
  72 #define R_BR    (0x0a)
  73 #define R_RL    (0x0c)
  74 #define R_RLA   (0x0d)
  75 #define R_REF   (0x0f)
  76 #define R_TRL   (0x12)
  77 #define R_TRLA  (0x13)
  78 #define R_RRTBI (0x14)
  79 #define R_RRTBA (0x15)
  80 #define R_CAI   (0x16)
  81 #define R_CREL  (0x17)
  82 #define R_RBA   (0x18)
  83 #define R_RBAC  (0x19)
  84 #define R_RBR   (0x1a)
  85 #define R_RBRC  (0x1b)
  86
  87 /* Storage class #defines, from /usr/include/storclass.h that are not already
  88    defined in internal.h */
  89
  90 /* Comment string in .info section */
  91 #define C_INFO          110
  92
  93 /* Auxillary Symbol Entries  */
  94
  95 /* x_smtyp values:  */
  96 #define SMTYP_ALIGN(x)  ((x) >> 3)      /* log2 of alignment */
  97 #define SMTYP_SMTYP(x)  ((x) & 0x7)     /* symbol type */
  98 /* Symbol type values:  */
  99 #define XTY_ER  0               /* External reference */
 100 #define XTY_SD  1               /* Csect definition */
 101 #define XTY_LD  2               /* Label definition */
 102 #define XTY_CM  3               /* .BSS */
 103 #define XTY_EM  4               /* Error message */
 104 #define XTY_US  5               /* "Reserved for internal use" */
 105
 106 /* x_smclas values:  */
 107 #define XMC_PR  0               /* Read-only program code */
 108 #define XMC_RO  1               /* Read-only constant */
 109 #define XMC_DB  2               /* Read-only debug dictionary table */
 110 #define XMC_TC  3               /* Read-write general TOC entry */
 111 #define XMC_UA  4               /* Read-write unclassified */
 112 #define XMC_RW  5               /* Read-write data */
 113 #define XMC_GL  6               /* Read-only global linkage */
 114 #define XMC_XO  7               /* Read-only extended operation */
 115 #define XMC_SV  8               /* Read-only supervisor call */
 116 #define XMC_BS  9               /* Read-write BSS */
 117 #define XMC_DS  10              /* Read-write descriptor csect */
 118 #define XMC_UC  11              /* Read-write unnamed Fortran common */
 119 #define XMC_TI  12              /* Read-only traceback index csect */
 120 #define XMC_TB  13              /* Read-only traceback table csect */
 121 /*              14      ??? */
 122 #define XMC_TC0 15              /* Read-write TOC anchor */
 123 #define XMC_TD  16              /* Read-write data in TOC */
 124 #define XMC_SV64   17           /* Read-only 64 bit supervisor call */
 125 #define XMC_SV3264 18           /* Read-only 32 or 64 bit supervisor call */
 126
 127 /* The ldhdr structure.  This appears at the start of the .loader
 128    section.  */
 129
 130 struct internal_ldhdr
 131 {
 132   /* The version number:
 133      1 : 32 bit
 134      2 : 64 bit */
 135   unsigned long l_version;
 136
 137   /* The number of symbol table entries.  */
 138   bfd_size_type l_nsyms;
 139
 140   /* The number of relocation table entries.  */
 141   bfd_size_type l_nreloc;
 142
 143   /* The length of the import file string table.  */
 144   bfd_size_type l_istlen;
 145
 146   /* The number of import files.  */
 147   bfd_size_type l_nimpid;
 148
 149   /* The offset from the start of the .loader section to the first
 150      entry in the import file table.  */
 151   bfd_size_type l_impoff;
 152
 153   /* The length of the string table.  */
 154   bfd_size_type l_stlen;
 155
 156   /* The offset from the start of the .loader section to the first
 157      entry in the string table.  */
 158   bfd_size_type l_stoff;
 159
 160   /* The offset to start of the symbol table, only in XCOFF64 */
 161   bfd_vma l_symoff;
 162
 163   /* The offset to the start of the relocation table, only in XCOFF64 */
 164   bfd_vma l_rldoff;
 165 };
 166
 167 /* The ldsym structure.  This is used to represent a symbol in the
 168    .loader section.  */
 169
 170 struct internal_ldsym
 171 {
 172   union
 173   {
 174     /* The symbol name if <= SYMNMLEN characters.  */
 175     char _l_name[SYMNMLEN];
 176     struct
 177     {
 178       /* Zero if the symbol name is more than SYMNMLEN characters.  */
 179         long _l_zeroes;
 180
 181       /* The offset in the string table if the symbol name is more
 182          than SYMNMLEN characters.  */
 183       long _l_offset;
 184     }
 185     _l_l;
 186   }
 187   _l;
 188
 189   /* The symbol value.  */
 190   bfd_vma l_value;
 191
 192   /* The symbol section number.  */
 193   short l_scnum;
 194
 195   /* The symbol type and flags.  */
 196   char l_smtype;
 197
 198   /* The symbol storage class.  */
 199   char l_smclas;
 200
 201   /* The import file ID.  */
 202   bfd_size_type l_ifile;
 203
 204   /* Offset to the parameter type check string.  */
 205   bfd_size_type l_parm;
 206 };
 207
 208 /* These flags are for the l_smtype field (the lower three bits are an
 209    XTY_* value).  */
 210
 211 /* Imported symbol.  */
 212 #define L_IMPORT (0x40)
 213 /* Entry point.  */
 214 #define L_ENTRY (0x20)
 215 /* Exported symbol.  */
 216 #define L_EXPORT (0x10)
 217
 218 /* The ldrel structure.  This is used to represent a reloc in the
 219    .loader section.  */
 220
 221 struct internal_ldrel
 222 {
 223   /* The reloc address.  */
 224   bfd_vma l_vaddr;
 225
 226   /* The symbol table index in the .loader section symbol table.  */
 227   bfd_size_type l_symndx;
 228
 229   /* The relocation type and size.  */
 230   short l_rtype;
 231
 232   /* The section number this relocation applies to.  */
 233   short l_rsecnm;
 234 };
 235
 236 /* An entry in the XCOFF linker hash table.  */
 237 struct xcoff_link_hash_entry
 238 {
 239   struct bfd_link_hash_entry root;
 240
 241   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 242      there is a reloc against this symbol.  */
 243   long indx;
 244
 245   /* If we have created a TOC entry for this symbol, this is the .tc
 246      section which holds it.  */
 247   asection *toc_section;
 248
 249   union
 250   {
 251     /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
 252        set), this is the offset in toc_section.  */
 253     bfd_vma toc_offset;
 254
 255     /* If the TOC entry comes from an input file, this is set to the
 256        symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol.  */
 257     long toc_indx;
 258   }
 259   u;
 260
 261   /* If this symbol is a function entry point which is called, this
 262      field holds a pointer to the function descriptor.  If this symbol
 263      is a function descriptor, this field holds a pointer to the
 264      function entry point.  */
 265   struct xcoff_link_hash_entry *descriptor;
 266
 267   /* The .loader symbol table entry, if there is one.  */
 268   struct internal_ldsym *ldsym;
 269
 270   /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
 271      index.  If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
 272      this is the l_ifile value.  */
 273   long ldindx;
 274
 275   /* Some linker flags.  */
 276   unsigned long flags;
 277
 278   /* The storage mapping class.  */
 279   unsigned char smclas;
 280 };
 281
 282 /*  Flags for xcoff_link_hash_entry.  */
 283
 284 /* Symbol is referenced by a regular object. */
 285 #define XCOFF_REF_REGULAR      0x00000001
 286 /* Symbol is defined by a regular object. */
 287 #define XCOFF_DEF_REGULAR      0x00000002
 288 /* Symbol is defined by a dynamic object. */
 289 #define XCOFF_DEF_DYNAMIC      0x00000004
 290 /* Symbol is used in a reloc being copied into the .loader section.  */
 291 #define XCOFF_LDREL            0x00000008
 292 /* Symbol is the entry point.  */
 293 #define XCOFF_ENTRY            0x00000010
 294 /* Symbol is called; this is, it appears in a R_BR reloc.  */
 295 #define XCOFF_CALLED           0x00000020
 296 /* Symbol needs the TOC entry filled in.  */
 297 #define XCOFF_SET_TOC          0x00000040
 298 /* Symbol is explicitly imported.  */
 299 #define XCOFF_IMPORT           0x00000080
 300 /* Symbol is explicitly exported.  */
 301 #define XCOFF_EXPORT           0x00000100
 302 /* Symbol has been processed by xcoff_build_ldsyms.  */
 303 #define XCOFF_BUILT_LDSYM      0x00000200
 304 /* Symbol is mentioned by a section which was not garbage collected. */
 305 #define XCOFF_MARK             0x00000400
 306 /* Symbol size is recorded in size_list list from hash table.  */
 307 #define XCOFF_HAS_SIZE         0x00000800
 308 /* Symbol is a function descriptor.  */
 309 #define XCOFF_DESCRIPTOR       0x00001000
 310 /* Multiple definitions have been for the symbol. */
 311 #define XCOFF_MULTIPLY_DEFINED 0x00002000
 312 /* Symbol is the __rtinit symbol.  */
 313 #define XCOFF_RTINIT           0x00004000
 314 /* Symbol is an imported 32 bit syscall.  */
 315 #define XCOFF_SYSCALL32        0x00008000
 316 /* Symbol is an imported 64 bit syscall.  */
 317 #define XCOFF_SYSCALL64        0x00010000
 318
 319 /* The XCOFF linker hash table.  */
 320
 321 #define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6
 322 #define XCOFF_SPECIAL_SECTION_TEXT       0
 323 #define XCOFF_SPECIAL_SECTION_ETEXT      1
 324 #define XCOFF_SPECIAL_SECTION_DATA       2
 325 #define XCOFF_SPECIAL_SECTION_EDATA      3
 326 #define XCOFF_SPECIAL_SECTION_END        4
 327 #define XCOFF_SPECIAL_SECTION_END2       5
 328
 329 struct xcoff_link_hash_table
 330 {
 331   struct bfd_link_hash_table root;
 332
 333   /* The .debug string hash table.  We need to compute this while
 334      reading the input files, so that we know how large the .debug
 335      section will be before we assign section positions.  */
 336   struct bfd_strtab_hash *debug_strtab;
 337
 338   /* The .debug section we will use for the final output.  */
 339   asection *debug_section;
 340
 341   /* The .loader section we will use for the final output.  */
 342   asection *loader_section;
 343
 344   /* A count of non TOC relative relocs which will need to be
 345      allocated in the .loader section.  */
 346   size_t ldrel_count;
 347
 348   /* The .loader section header.  */
 349   struct internal_ldhdr ldhdr;
 350
 351   /* The .gl section we use to hold global linkage code.  */
 352   asection *linkage_section;
 353
 354   /* The .tc section we use to hold toc entries we build for global
 355      linkage code.  */
 356   asection *toc_section;
 357
 358   /* The .ds section we use to hold function descriptors which we
 359      create for exported symbols.  */
 360   asection *descriptor_section;
 361
 362   /* The list of import files.  */
 363   struct xcoff_import_file *imports;
 364
 365   /* Required alignment of sections within the output file.  */
 366   unsigned long file_align;
 367
 368   /* Whether the .text section must be read-only.  */
 369   boolean textro;
 370
 371   /* Whether garbage collection was done.  */
 372   boolean gc;
 373
 374   /* A linked list of symbols for which we have size information.  */
 375   struct xcoff_link_size_list
 376   {
 377     struct xcoff_link_size_list *next;
 378     struct xcoff_link_hash_entry *h;
 379     bfd_size_type size;
 380   }
 381   *size_list;
 382
 383   /* Magic sections: _text, _etext, _data, _edata, _end, end. */
 384   asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
 385 };
 386
 387
 388 /* This structure is used to pass information through
 389    xcoff_link_hash_traverse.  */
 390
 391 struct xcoff_loader_info
 392 {
 393   /* Set if a problem occurred.  */
 394   boolean failed;
 395
 396   /* Output BFD.  */
 397   bfd *output_bfd;
 398
 399   /* Link information structure.  */
 400   struct bfd_link_info *info;
 401
 402   /* Whether all defined symbols should be exported.  */
 403   boolean export_defineds;
 404
 405   /* Number of ldsym structures.  */
 406   size_t ldsym_count;
 407
 408   /* Size of string table.  */
 409   size_t string_size;
 410
 411   /* String table.  */
 412   bfd_byte *strings;
 413
 414   /* Allocated size of string table.  */
 415   size_t string_alc;
 416 };
 417
 418 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
 419    from smaller values.  Start with zero, widen, *then* decrement.  */
 420 #define MINUS_ONE       (((bfd_vma) 0) - 1)
 421
 422 /* __rtinit, from /usr/include/rtinit.h.  */
 423 struct __rtinit
 424 {
 425   /* Pointer to runtime linker.
 426      XXX: Is the parameter really void?  */
 427   int   (*rtl) PARAMS ((void));
 428
 429   /* Offset to array of init functions, 0 if none. */
 430   int   init_offset;
 431
 432   /* Offset to array of fini functions, 0 if none. */
 433   int   fini_offset;
 434
 435   /* Size of __RTINIT_DESCRIPTOR. This value should be used instead of
 436      sizeof(__RTINIT_DESCRIPTOR). */
 437   int   __rtinit_descriptor_size;
 438 };
 439
 440 #define RTINIT_DESCRIPTOR_SIZE (12)
 441
 442 struct __rtinit_descriptor
 443 {
 444   /* Init/fini function. */
 445   int   f;
 446
 447   /* Offset, relative to the start of the __rtinit symbol, to name of the
 448      function. */
 449
 450   int   name_offset;
 451
 452   /* Flags */
 453   unsigned char flags;
 454 };
 455
 456 /* Archive */
 457
 458 #define XCOFFARMAG    "<aiaff>\012"
 459 #define XCOFFARMAGBIG "<bigaf>\012"
 460 #define SXCOFFARMAG   8
 461
 462 /* The size of the ascii archive elements */
 463 #define XCOFFARMAG_ELEMENT_SIZE 12
 464 #define XCOFFARMAGBIG_ELEMENT_SIZE 20
 465
 466 /* This terminates an XCOFF archive member name.  */
 467
 468 #define XCOFFARFMAG "`\012"
 469 #define SXCOFFARFMAG 2
 470
 471 /* XCOFF archives start with this (printable) structure.  */
 472
 473 struct xcoff_ar_file_hdr
 474 {
 475   /* Magic string.  */
 476   char magic[SXCOFFARMAG];
 477
 478   /* Offset of the member table (decimal ASCII string).  */
 479   char memoff[XCOFFARMAG_ELEMENT_SIZE];
 480
 481   /* Offset of the global symbol table (decimal ASCII string).  */
 482   char symoff[XCOFFARMAG_ELEMENT_SIZE];
 483
 484   /* Offset of the first member in the archive (decimal ASCII string).  */
 485   char firstmemoff[XCOFFARMAG_ELEMENT_SIZE];
 486
 487   /* Offset of the last member in the archive (decimal ASCII string).  */
 488   char lastmemoff[XCOFFARMAG_ELEMENT_SIZE];
 489
 490   /* Offset of the first member on the free list (decimal ASCII
 491      string).  */
 492   char freeoff[XCOFFARMAG_ELEMENT_SIZE];
 493 };
 494
 495 #define SIZEOF_AR_FILE_HDR (SXCOFFARMAG + 5 * XCOFFARMAG_ELEMENT_SIZE)
 496
 497 /* This is the equivalent data structure for the big archive format.  */
 498
 499 struct xcoff_ar_file_hdr_big
 500 {
 501   /* Magic string.  */
 502   char magic[SXCOFFARMAG];
 503
 504   /* Offset of the member table (decimal ASCII string).  */
 505   char memoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 506
 507   /* Offset of the global symbol table for 32-bit objects (decimal ASCII
 508      string).  */
 509   char symoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 510
 511   /* Offset of the global symbol table for 64-bit objects (decimal ASCII
 512      string).  */
 513   char symoff64[XCOFFARMAGBIG_ELEMENT_SIZE];
 514
 515   /* Offset of the first member in the archive (decimal ASCII string).  */
 516   char firstmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 517
 518   /* Offset of the last member in the archive (decimal ASCII string).  */
 519   char lastmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 520
 521   /* Offset of the first member on the free list (decimal ASCII
 522      string).  */
 523   char freeoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 524 };
 525
 526 #define SIZEOF_AR_FILE_HDR_BIG (SXCOFFARMAG + 6 * XCOFFARMAGBIG_ELEMENT_SIZE)
 527
 528 /* Each XCOFF archive member starts with this (printable) structure.  */
 529
 530 struct xcoff_ar_hdr
 531 {
 532   /* File size not including the header (decimal ASCII string).  */
 533   char size[XCOFFARMAG_ELEMENT_SIZE];
 534
 535   /* File offset of next archive member (decimal ASCII string).  */
 536   char nextoff[XCOFFARMAG_ELEMENT_SIZE];
 537
 538   /* File offset of previous archive member (decimal ASCII string).  */
 539   char prevoff[XCOFFARMAG_ELEMENT_SIZE];
 540
 541   /* File mtime (decimal ASCII string).  */
 542   char date[12];
 543
 544   /* File UID (decimal ASCII string).  */
 545   char uid[12];
 546
 547   /* File GID (decimal ASCII string).  */
 548   char gid[12];
 549
 550   /* File mode (octal ASCII string).  */
 551   char mode[12];
 552
 553   /* Length of file name (decimal ASCII string).  */
 554   char namlen[4];
 555
 556   /* This structure is followed by the file name.  The length of the
 557      name is given in the namlen field.  If the length of the name is
 558      odd, the name is followed by a null byte.  The name and optional
 559      null byte are followed by XCOFFARFMAG, which is not included in
 560      namlen.  The contents of the archive member follow; the number of
 561      bytes is given in the size field.  */
 562 };
 563
 564 #define SIZEOF_AR_HDR (3 * XCOFFARMAG_ELEMENT_SIZE + 4 * 12 + 4)
 565
 566 /* The equivalent for the big archive format.  */
 567
 568 struct xcoff_ar_hdr_big
 569 {
 570   /* File size not including the header (decimal ASCII string).  */
 571   char size[XCOFFARMAGBIG_ELEMENT_SIZE];
 572
 573   /* File offset of next archive member (decimal ASCII string).  */
 574   char nextoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 575
 576   /* File offset of previous archive member (decimal ASCII string).  */
 577   char prevoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 578
 579   /* File mtime (decimal ASCII string).  */
 580   char date[12];
 581
 582   /* File UID (decimal ASCII string).  */
 583   char uid[12];
 584
 585   /* File GID (decimal ASCII string).  */
 586   char gid[12];
 587
 588   /* File mode (octal ASCII string).  */
 589   char mode[12];
 590
 591   /* Length of file name (decimal ASCII string).  */
 592   char namlen[4];
 593
 594   /* This structure is followed by the file name.  The length of the
 595      name is given in the namlen field.  If the length of the name is
 596      odd, the name is followed by a null byte.  The name and optional
 597      null byte are followed by XCOFFARFMAG, which is not included in
 598      namlen.  The contents of the archive member follow; the number of
 599      bytes is given in the size field.  */
 600 };
 601
 602 #define SIZEOF_AR_HDR_BIG (3 * XCOFFARMAGBIG_ELEMENT_SIZE + 4 * 12 + 4)
 603
 604 /* We often have to distinguish between the old and big file format.
 605    Make it a bit cleaner.  We can use `xcoff_ardata' here because the
 606    `hdr' member has the same size and position in both formats.
 607    <bigaf> is the default format, return true even when xcoff_ardata is
 608    NULL. */
 609 #ifndef SMALL_ARCHIVE
 610 /* Creates big archives by default */
 611 #define xcoff_big_format_p(abfd) \
 612   ((NULL != bfd_ardata (abfd) && NULL == xcoff_ardata (abfd)) || \
 613    ((NULL != bfd_ardata (abfd)) && \
 614     (NULL != xcoff_ardata (abfd)) && \
 615     (xcoff_ardata (abfd)->magic[1] == 'b')))
 616 #else
 617 /* Creates small archives by default. */
 618 #define xcoff_big_format_p(abfd) \
 619   (((NULL != bfd_ardata (abfd)) && \
 620     (NULL != xcoff_ardata (abfd)) && \
 621     (xcoff_ardata (abfd)->magic[1] == 'b')))
 622 #endif
 623
 624 /* We store a copy of the xcoff_ar_file_hdr in the tdata field of the
 625    artdata structure.  Similar for the big archive.  */
 626 #define xcoff_ardata(abfd) \
 627   ((struct xcoff_ar_file_hdr *) bfd_ardata (abfd)->tdata)
 628 #define xcoff_ardata_big(abfd) \
 629   ((struct xcoff_ar_file_hdr_big *) bfd_ardata (abfd)->tdata)
 630
 631 /* We store a copy of the xcoff_ar_hdr in the arelt_data field of an
 632    archive element.  Similar for the big archive.  */
 633 #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data))
 634 #define arch_xhdr(bfd) \
 635   ((struct xcoff_ar_hdr *) arch_eltdata (bfd)->arch_header)
 636 #define arch_xhdr_big(bfd) \
 637   ((struct xcoff_ar_hdr_big *) arch_eltdata (bfd)->arch_header)
 638
 639 #endif /* _INTERNAL_XCOFF_H */