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, 2002, 2003, 2005,
   4    2009, 2010  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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #ifndef _INTERNAL_XCOFF_H
  25 #define _INTERNAL_XCOFF_H
  26
  27 /* XCOFF specific f_flags.  */
  28
  29 /* File was profiled with fdpr.  */
  30 #define F_FDPR_PROF 0x0010
  31
  32 /* File was reordered with fdpr.  */
  33 #define F_FDPR_OPTI 0x0020
  34
  35 /* File use very large program support.  */
  36 #define F_DSA       0x0040
  37
  38 /* One aux header specifying medium page sizes is non-zero.  */
  39 #define F_VARPG     0x0100
  40
  41 /* Read/write sections are non-executable.  */
  42 #define F_NONEXEC   0x8000
  43
  44 /* Linker */
  45
  46 /* Names of "special" sections.  */
  47 #define _TEXT   ".text"
  48 #define _DATA   ".data"
  49 #define _BSS    ".bss"
  50 #define _PAD    ".pad"
  51 #define _LOADER ".loader"
  52 #define _EXCEPT ".except"
  53 #define _TYPCHK ".typchk"
  54
  55 /* XCOFF uses special .dwXXX sections with the type STYP_DWARF.  */
  56 #define STYP_DWARF  0x0010
  57
  58 /* High-order 16-bits dwarf subtypes.  */
  59 #define SSUBTYP_DWINFO  0x10000
  60 #define SSUBTYP_DWLINE  0x20000
  61 #define SSUBTYP_DWPBNMS 0x30000
  62 #define SSUBTYP_DWPBTYP 0x40000
  63 #define SSUBTYP_DWARNGE 0x50000
  64 #define SSUBTYP_DWABREV 0x60000
  65 #define SSUBTYP_DWSTR   0x70000
  66 #define SSUBTYP_DWRNGES 0x80000
  67
  68 /* XCOFF uses a special .loader section with type STYP_LOADER.  */
  69 #define STYP_LOADER 0x1000
  70
  71 /* Specifies an exception section.  A section of this type provides
  72    information to identify the reason that a trap or ececptin occured within
  73    and executable object program */
  74 #define STYP_EXCEPT 0x0100
  75
  76 /* Specifies an initialized thread-local data section.  */
  77 #define STYP_TDATA  0x0400
  78
  79 /* Specifies an uninitialized thread-local data section.  */
  80 #define STYP_TBSS   0x0800
  81
  82 /* XCOFF uses a special .debug section with type STYP_DEBUG.  */
  83 #define STYP_DEBUG  0x2000
  84
  85 /* Specifies a type check section.  A section of this type contains parameter
  86    argument type check strings used by the AIX binder.  */
  87 #define STYP_TYPCHK 0x4000
  88
  89 /* XCOFF handles line number or relocation overflow by creating
  90    another section header with STYP_OVRFLO set.  */
  91 #define STYP_OVRFLO 0x8000
  92
  93 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
  94 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
  95 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
  96
  97 /* XCOFF relocation types.
  98    The relocations are described in the function
  99    xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c  */
 100
 101 #define R_POS   (0x00)
 102 #define R_NEG   (0x01)
 103 #define R_REL   (0x02)
 104 #define R_TOC   (0x03)
 105 #define R_RTB   (0x04)
 106 #define R_GL    (0x05)
 107 #define R_TCL   (0x06)
 108 #define R_BA    (0x08)
 109 #define R_BR    (0x0a)
 110 #define R_RL    (0x0c)
 111 #define R_RLA   (0x0d)
 112 #define R_REF   (0x0f)
 113 #define R_TRL   (0x12)
 114 #define R_TRLA  (0x13)
 115 #define R_RRTBI (0x14)
 116 #define R_RRTBA (0x15)
 117 #define R_CAI   (0x16)
 118 #define R_CREL  (0x17)
 119 #define R_RBA   (0x18)
 120 #define R_RBAC  (0x19)
 121 #define R_RBR   (0x1a)
 122 #define R_RBRC  (0x1b)
 123 #define R_TLS   (0x20)
 124 #define R_TLS_IE (0x21)
 125 #define R_TLS_LD (0x22)
 126 #define R_TLS_LE (0x23)
 127 #define R_TLSM  (0x24)
 128 #define R_TLSML (0x25)
 129 #define R_TOCU  (0x30)
 130 #define R_TOCL  (0x31)
 131
 132 /* Storage class #defines, from /usr/include/storclass.h that are not already
 133    defined in internal.h */
 134
 135 /* Comment string in .info section */
 136 #define C_INFO          110
 137
 138 /* Dwarf symbol.  */
 139 #define C_DWARF         112
 140
 141 /* Auxillary Symbol Entries  */
 142
 143 /* x_smtyp values:  */
 144 #define SMTYP_ALIGN(x)  ((x) >> 3)      /* log2 of alignment */
 145 #define SMTYP_SMTYP(x)  ((x) & 0x7)     /* symbol type */
 146 /* Symbol type values:  */
 147 #define XTY_ER  0               /* External reference */
 148 #define XTY_SD  1               /* Csect definition */
 149 #define XTY_LD  2               /* Label definition */
 150 #define XTY_CM  3               /* .BSS */
 151 #define XTY_EM  4               /* Error message */
 152 #define XTY_US  5               /* "Reserved for internal use" */
 153
 154 /* x_smclas values:  */
 155 #define XMC_PR  0               /* Read-only program code */
 156 #define XMC_RO  1               /* Read-only constant */
 157 #define XMC_DB  2               /* Read-only debug dictionary table */
 158 #define XMC_TC  3               /* Read-write general TOC entry */
 159 #define XMC_UA  4               /* Read-write unclassified */
 160 #define XMC_RW  5               /* Read-write data */
 161 #define XMC_GL  6               /* Read-only global linkage */
 162 #define XMC_XO  7               /* Read-only extended operation */
 163 #define XMC_SV  8               /* Read-only supervisor call */
 164 #define XMC_BS  9               /* Read-write BSS */
 165 #define XMC_DS  10              /* Read-write descriptor csect */
 166 #define XMC_UC  11              /* Read-write unnamed Fortran common */
 167 #define XMC_TI  12              /* Read-only traceback index csect */
 168 #define XMC_TB  13              /* Read-only traceback table csect */
 169 /*              14      ??? */
 170 #define XMC_TC0 15              /* Read-write TOC anchor */
 171 #define XMC_TD  16              /* Read-write data in TOC */
 172 #define XMC_SV64   17           /* Read-only 64 bit supervisor call */
 173 #define XMC_SV3264 18           /* Read-only 32 or 64 bit supervisor call */
 174
 175 /* The ldhdr structure.  This appears at the start of the .loader
 176    section.  */
 177
 178 struct internal_ldhdr
 179 {
 180   /* The version number:
 181      1 : 32 bit
 182      2 : 64 bit */
 183   unsigned long l_version;
 184
 185   /* The number of symbol table entries.  */
 186   bfd_size_type l_nsyms;
 187
 188   /* The number of relocation table entries.  */
 189   bfd_size_type l_nreloc;
 190
 191   /* The length of the import file string table.  */
 192   bfd_size_type l_istlen;
 193
 194   /* The number of import files.  */
 195   bfd_size_type l_nimpid;
 196
 197   /* The offset from the start of the .loader section to the first
 198      entry in the import file table.  */
 199   bfd_size_type l_impoff;
 200
 201   /* The length of the string table.  */
 202   bfd_size_type l_stlen;
 203
 204   /* The offset from the start of the .loader section to the first
 205      entry in the string table.  */
 206   bfd_size_type l_stoff;
 207
 208   /* The offset to start of the symbol table, only in XCOFF64 */
 209   bfd_vma l_symoff;
 210
 211   /* The offset to the start of the relocation table, only in XCOFF64 */
 212   bfd_vma l_rldoff;
 213 };
 214
 215 /* The ldsym structure.  This is used to represent a symbol in the
 216    .loader section.  */
 217
 218 struct internal_ldsym
 219 {
 220   union
 221   {
 222     /* The symbol name if <= SYMNMLEN characters.  */
 223     char _l_name[SYMNMLEN];
 224     struct
 225     {
 226       /* Zero if the symbol name is more than SYMNMLEN characters.  */
 227         long _l_zeroes;
 228
 229       /* The offset in the string table if the symbol name is more
 230          than SYMNMLEN characters.  */
 231       long _l_offset;
 232     }
 233     _l_l;
 234   }
 235   _l;
 236
 237   /* The symbol value.  */
 238   bfd_vma l_value;
 239
 240   /* The symbol section number.  */
 241   short l_scnum;
 242
 243   /* The symbol type and flags.  */
 244   char l_smtype;
 245
 246   /* The symbol storage class.  */
 247   char l_smclas;
 248
 249   /* The import file ID.  */
 250   bfd_size_type l_ifile;
 251
 252   /* Offset to the parameter type check string.  */
 253   bfd_size_type l_parm;
 254 };
 255
 256 /* These flags are for the l_smtype field (the lower three bits are an
 257    XTY_* value).  */
 258
 259 /* Imported symbol.  */
 260 #define L_IMPORT (0x40)
 261 /* Entry point.  */
 262 #define L_ENTRY (0x20)
 263 /* Exported symbol.  */
 264 #define L_EXPORT (0x10)
 265 /* Weak symbol.  */
 266 #define L_WEAK (0x08)
 267
 268 /* The ldrel structure.  This is used to represent a reloc in the
 269    .loader section.  */
 270
 271 struct internal_ldrel
 272 {
 273   /* The reloc address.  */
 274   bfd_vma l_vaddr;
 275
 276   /* The symbol table index in the .loader section symbol table.  */
 277   bfd_size_type l_symndx;
 278
 279   /* The relocation type and size.  */
 280   short l_rtype;
 281
 282   /* The section number this relocation applies to.  */
 283   short l_rsecnm;
 284 };
 285
 286 /* An entry in the XCOFF linker hash table.  */
 287 struct xcoff_link_hash_entry
 288 {
 289   struct bfd_link_hash_entry root;
 290
 291   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 292      there is a reloc against this symbol.  */
 293   long indx;
 294
 295   /* If we have created a TOC entry for this symbol, this is the .tc
 296      section which holds it.  */
 297   asection *toc_section;
 298
 299   union
 300   {
 301     /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
 302        set), this is the offset in toc_section.  */
 303     bfd_vma toc_offset;
 304
 305     /* If the TOC entry comes from an input file, this is set to the
 306        symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol.  */
 307     long toc_indx;
 308   }
 309   u;
 310
 311   /* If this symbol is a function entry point which is called, this
 312      field holds a pointer to the function descriptor.  If this symbol
 313      is a function descriptor, this field holds a pointer to the
 314      function entry point.  */
 315   struct xcoff_link_hash_entry *descriptor;
 316
 317   /* The .loader symbol table entry, if there is one.  */
 318   struct internal_ldsym *ldsym;
 319
 320   /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
 321      index.  If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
 322      this is the l_ifile value.  */
 323   long ldindx;
 324
 325   /* Some linker flags.  */
 326   unsigned long flags;
 327
 328   /* The storage mapping class.  */
 329   unsigned char smclas;
 330 };
 331
 332 /*  Flags for xcoff_link_hash_entry.  */
 333
 334 /* Symbol is referenced by a regular object. */
 335 #define XCOFF_REF_REGULAR      0x00000001
 336 /* Symbol is defined by a regular object. */
 337 #define XCOFF_DEF_REGULAR      0x00000002
 338 /* Symbol is defined by a dynamic object. */
 339 #define XCOFF_DEF_DYNAMIC      0x00000004
 340 /* Symbol is used in a reloc being copied into the .loader section.  */
 341 #define XCOFF_LDREL            0x00000008
 342 /* Symbol is the entry point.  */
 343 #define XCOFF_ENTRY            0x00000010
 344 /* Symbol is for a function and is the target of a relocation.
 345    The relocation may or may not be a branch-type relocation.  */
 346 #define XCOFF_CALLED           0x00000020
 347 /* Symbol needs the TOC entry filled in.  */
 348 #define XCOFF_SET_TOC          0x00000040
 349 /* Symbol is implicitly or explicitly imported.  */
 350 #define XCOFF_IMPORT           0x00000080
 351 /* Symbol is explicitly exported.  */
 352 #define XCOFF_EXPORT           0x00000100
 353 /* Symbol has been processed by xcoff_build_ldsyms.  */
 354 #define XCOFF_BUILT_LDSYM      0x00000200
 355 /* Symbol is mentioned by a section which was not garbage collected. */
 356 #define XCOFF_MARK             0x00000400
 357 /* Symbol size is recorded in size_list list from hash table.  */
 358 #define XCOFF_HAS_SIZE         0x00000800
 359 /* Symbol is a function descriptor.  */
 360 #define XCOFF_DESCRIPTOR       0x00001000
 361 /* Multiple definitions have been for the symbol. */
 362 #define XCOFF_MULTIPLY_DEFINED 0x00002000
 363 /* Symbol is the __rtinit symbol.  */
 364 #define XCOFF_RTINIT           0x00004000
 365 /* Symbol is an imported 32 bit syscall.  */
 366 #define XCOFF_SYSCALL32        0x00008000
 367 /* Symbol is an imported 64 bit syscall.  */
 368 #define XCOFF_SYSCALL64        0x00010000
 369 /* Symbol was not explicitly defined by the time it was marked.  */
 370 #define XCOFF_WAS_UNDEFINED    0x00020000
 371 /* We have assigned an output XCOFF entry to this symbol.  */
 372 #define XCOFF_ALLOCATED        0x00040000
 373
 374 /* The XCOFF linker hash table.  */
 375
 376 #define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6
 377 #define XCOFF_SPECIAL_SECTION_TEXT       0
 378 #define XCOFF_SPECIAL_SECTION_ETEXT      1
 379 #define XCOFF_SPECIAL_SECTION_DATA       2
 380 #define XCOFF_SPECIAL_SECTION_EDATA      3
 381 #define XCOFF_SPECIAL_SECTION_END        4
 382 #define XCOFF_SPECIAL_SECTION_END2       5
 383
 384 /* These flags indicate which of -bexpall and -bexpfull are in effect.  */
 385 #define XCOFF_EXPALL 1
 386 #define XCOFF_EXPFULL 2
 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   bfd_boolean failed;
 395
 396   /* Output BFD.  */
 397   bfd *output_bfd;
 398
 399   /* Link information structure.  */
 400   struct bfd_link_info *info;
 401
 402   /* A mask of XCOFF_EXPALL and XCOFF_EXPFULL flags.  */
 403   unsigned int auto_export_flags;
 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   char *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) (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 /* True if symbols of class CLASS are external.  */
 640 #define EXTERN_SYM_P(CLASS) \
 641   ((CLASS) == C_EXT || (CLASS) == C_AIX_WEAKEXT)
 642
 643 #endif /* _INTERNAL_XCOFF_H */