include/coff/xcoff.h

   1 /* Internal format of XCOFF object file data structures for BFD.
   2
   3    Copyright (C) 1995-2017 Free Software Foundation, Inc.
   4    Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program 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 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program 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 this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #ifndef _INTERNAL_XCOFF_H
  24 #define _INTERNAL_XCOFF_H
  25
  26 /* XCOFF specific f_flags.  */
  27
  28 /* File was profiled with fdpr.  */
  29 #define F_FDPR_PROF 0x0010
  30
  31 /* File was reordered with fdpr.  */
  32 #define F_FDPR_OPTI 0x0020
  33
  34 /* File use very large program support.  */
  35 #define F_DSA       0x0040
  36
  37 /* One aux header specifying medium page sizes is non-zero.  */
  38 #define F_VARPG     0x0100
  39
  40 /* Read/write sections are non-executable.  */
  41 #define F_NONEXEC   0x8000
  42
  43 /* Linker */
  44
  45 /* Names of "special" sections.  */
  46 #define _TEXT   ".text"
  47 #define _DATA   ".data"
  48 #define _BSS    ".bss"
  49 #define _PAD    ".pad"
  50 #define _LOADER ".loader"
  51 #define _EXCEPT ".except"
  52 #define _TYPCHK ".typchk"
  53
  54 /* XCOFF uses special .dwXXX sections with the type STYP_DWARF.  */
  55 #define STYP_DWARF  0x0010
  56
  57 /* High-order 16-bits dwarf subtypes.  */
  58 #define SSUBTYP_DWINFO  0x10000
  59 #define SSUBTYP_DWLINE  0x20000
  60 #define SSUBTYP_DWPBNMS 0x30000
  61 #define SSUBTYP_DWPBTYP 0x40000
  62 #define SSUBTYP_DWARNGE 0x50000
  63 #define SSUBTYP_DWABREV 0x60000
  64 #define SSUBTYP_DWSTR   0x70000
  65 #define SSUBTYP_DWRNGES 0x80000
  66
  67 /* XCOFF uses a special .loader section with type STYP_LOADER.  */
  68 #define STYP_LOADER 0x1000
  69
  70 /* Specifies an exception section.  A section of this type provides
  71    information to identify the reason that a trap or ececptin occured within
  72    and executable object program */
  73 #define STYP_EXCEPT 0x0100
  74
  75 /* Specifies an initialized thread-local data section.  */
  76 #define STYP_TDATA  0x0400
  77
  78 /* Specifies an uninitialized thread-local data section.  */
  79 #define STYP_TBSS   0x0800
  80
  81 /* XCOFF uses a special .debug section with type STYP_DEBUG.  */
  82 #define STYP_DEBUG  0x2000
  83
  84 /* Specifies a type check section.  A section of this type contains parameter
  85    argument type check strings used by the AIX binder.  */
  86 #define STYP_TYPCHK 0x4000
  87
  88 /* XCOFF handles line number or relocation overflow by creating
  89    another section header with STYP_OVRFLO set.  */
  90 #define STYP_OVRFLO 0x8000
  91
  92 #define RS6K_AOUTHDR_OMAGIC 0x0107 /* old: text & data writeable */
  93 #define RS6K_AOUTHDR_NMAGIC 0x0108 /* new: text r/o, data r/w */
  94 #define RS6K_AOUTHDR_ZMAGIC 0x010B /* paged: text r/o, both page-aligned */
  95
  96 /* XCOFF relocation types.
  97    The relocations are described in the function
  98    xcoff[64]_ppc_relocate_section in coff64-rs6000.c and coff-rs6000.c  */
  99
 100 #define R_POS   (0x00)
 101 #define R_NEG   (0x01)
 102 #define R_REL   (0x02)
 103 #define R_TOC   (0x03)
 104 #define R_RTB   (0x04)
 105 #define R_GL    (0x05)
 106 #define R_TCL   (0x06)
 107 #define R_BA    (0x08)
 108 #define R_BR    (0x0a)
 109 #define R_RL    (0x0c)
 110 #define R_RLA   (0x0d)
 111 #define R_REF   (0x0f)
 112 #define R_TRL   (0x12)
 113 #define R_TRLA  (0x13)
 114 #define R_RRTBI (0x14)
 115 #define R_RRTBA (0x15)
 116 #define R_CAI   (0x16)
 117 #define R_CREL  (0x17)
 118 #define R_RBA   (0x18)
 119 #define R_RBAC  (0x19)
 120 #define R_RBR   (0x1a)
 121 #define R_RBRC  (0x1b)
 122 #define R_TLS   (0x20)
 123 #define R_TLS_IE (0x21)
 124 #define R_TLS_LD (0x22)
 125 #define R_TLS_LE (0x23)
 126 #define R_TLSM  (0x24)
 127 #define R_TLSML (0x25)
 128 #define R_TOCU  (0x30)
 129 #define R_TOCL  (0x31)
 130
 131 /* Storage class #defines, from /usr/include/storclass.h that are not already
 132    defined in internal.h */
 133
 134 /* Comment string in .info section */
 135 #define C_INFO          110
 136
 137 /* Dwarf symbol.  */
 138 #define C_DWARF         112
 139
 140 /* Auxillary Symbol Entries  */
 141
 142 /* x_smtyp values:  */
 143 #define SMTYP_ALIGN(x)  ((x) >> 3)      /* log2 of alignment */
 144 #define SMTYP_SMTYP(x)  ((x) & 0x7)     /* symbol type */
 145 /* Symbol type values:  */
 146 #define XTY_ER  0               /* External reference */
 147 #define XTY_SD  1               /* Csect definition */
 148 #define XTY_LD  2               /* Label definition */
 149 #define XTY_CM  3               /* .BSS */
 150 #define XTY_EM  4               /* Error message */
 151 #define XTY_US  5               /* "Reserved for internal use" */
 152
 153 /* x_smclas values:  */
 154 #define XMC_PR  0               /* Read-only program code */
 155 #define XMC_RO  1               /* Read-only constant */
 156 #define XMC_DB  2               /* Read-only debug dictionary table */
 157 #define XMC_TC  3               /* Read-write general TOC entry */
 158 #define XMC_UA  4               /* Read-write unclassified */
 159 #define XMC_RW  5               /* Read-write data */
 160 #define XMC_GL  6               /* Read-only global linkage */
 161 #define XMC_XO  7               /* Read-only extended operation */
 162 #define XMC_SV  8               /* Read-only supervisor call */
 163 #define XMC_BS  9               /* Read-write BSS */
 164 #define XMC_DS  10              /* Read-write descriptor csect */
 165 #define XMC_UC  11              /* Read-write unnamed Fortran common */
 166 #define XMC_TI  12              /* Read-only traceback index csect */
 167 #define XMC_TB  13              /* Read-only traceback table csect */
 168 /*              14      ??? */
 169 #define XMC_TC0 15              /* Read-write TOC anchor */
 170 #define XMC_TD  16              /* Read-write data in TOC */
 171 #define XMC_SV64   17           /* Read-only 64 bit supervisor call */
 172 #define XMC_SV3264 18           /* Read-only 32 or 64 bit supervisor call */
 173 /*                19   ??? */
 174 #define XMC_TL     20          /* Read-write initialized TLS data */
 175 #define XMC_TU     21          /* Read-write uninitialized TLS data */
 176 #define XMC_TE     22          /* Same as XMC_TC but mapped after it */
 177
 178 /* The ldhdr structure.  This appears at the start of the .loader
 179    section.  */
 180
 181 struct internal_ldhdr
 182 {
 183   /* The version number:
 184      1 : 32 bit
 185      2 : 64 bit */
 186   unsigned long l_version;
 187
 188   /* The number of symbol table entries.  */
 189   bfd_size_type l_nsyms;
 190
 191   /* The number of relocation table entries.  */
 192   bfd_size_type l_nreloc;
 193
 194   /* The length of the import file string table.  */
 195   bfd_size_type l_istlen;
 196
 197   /* The number of import files.  */
 198   bfd_size_type l_nimpid;
 199
 200   /* The offset from the start of the .loader section to the first
 201      entry in the import file table.  */
 202   bfd_size_type l_impoff;
 203
 204   /* The length of the string table.  */
 205   bfd_size_type l_stlen;
 206
 207   /* The offset from the start of the .loader section to the first
 208      entry in the string table.  */
 209   bfd_size_type l_stoff;
 210
 211   /* The offset to start of the symbol table, only in XCOFF64 */
 212   bfd_vma l_symoff;
 213
 214   /* The offset to the start of the relocation table, only in XCOFF64 */
 215   bfd_vma l_rldoff;
 216 };
 217
 218 /* The ldsym structure.  This is used to represent a symbol in the
 219    .loader section.  */
 220
 221 struct internal_ldsym
 222 {
 223   union
 224   {
 225     /* The symbol name if <= SYMNMLEN characters.  */
 226     char _l_name[SYMNMLEN];
 227     struct
 228     {
 229       /* Zero if the symbol name is more than SYMNMLEN characters.  */
 230         long _l_zeroes;
 231
 232       /* The offset in the string table if the symbol name is more
 233          than SYMNMLEN characters.  */
 234       long _l_offset;
 235     }
 236     _l_l;
 237   }
 238   _l;
 239
 240   /* The symbol value.  */
 241   bfd_vma l_value;
 242
 243   /* The symbol section number.  */
 244   short l_scnum;
 245
 246   /* The symbol type and flags.  */
 247   char l_smtype;
 248
 249   /* The symbol storage class.  */
 250   char l_smclas;
 251
 252   /* The import file ID.  */
 253   bfd_size_type l_ifile;
 254
 255   /* Offset to the parameter type check string.  */
 256   bfd_size_type l_parm;
 257 };
 258
 259 /* These flags are for the l_smtype field (the lower three bits are an
 260    XTY_* value).  */
 261
 262 /* Imported symbol.  */
 263 #define L_IMPORT (0x40)
 264 /* Entry point.  */
 265 #define L_ENTRY (0x20)
 266 /* Exported symbol.  */
 267 #define L_EXPORT (0x10)
 268 /* Weak symbol.  */
 269 #define L_WEAK (0x08)
 270
 271 /* The ldrel structure.  This is used to represent a reloc in the
 272    .loader section.  */
 273
 274 struct internal_ldrel
 275 {
 276   /* The reloc address.  */
 277   bfd_vma l_vaddr;
 278
 279   /* The symbol table index in the .loader section symbol table.  */
 280   bfd_size_type l_symndx;
 281
 282   /* The relocation type and size.  */
 283   short l_rtype;
 284
 285   /* The section number this relocation applies to.  */
 286   short l_rsecnm;
 287 };
 288
 289 /* An entry in the XCOFF linker hash table.  */
 290 struct xcoff_link_hash_entry
 291 {
 292   struct bfd_link_hash_entry root;
 293
 294   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 295      there is a reloc against this symbol.  */
 296   long indx;
 297
 298   /* If we have created a TOC entry for this symbol, this is the .tc
 299      section which holds it.  */
 300   asection *toc_section;
 301
 302   union
 303   {
 304     /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
 305        set), this is the offset in toc_section.  */
 306     bfd_vma toc_offset;
 307
 308     /* If the TOC entry comes from an input file, this is set to the
 309        symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol.  */
 310     long toc_indx;
 311   }
 312   u;
 313
 314   /* If this symbol is a function entry point which is called, this
 315      field holds a pointer to the function descriptor.  If this symbol
 316      is a function descriptor, this field holds a pointer to the
 317      function entry point.  */
 318   struct xcoff_link_hash_entry *descriptor;
 319
 320   /* The .loader symbol table entry, if there is one.  */
 321   struct internal_ldsym *ldsym;
 322
 323   /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
 324      index.  If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
 325      this is the l_ifile value.  */
 326   long ldindx;
 327
 328   /* Some linker flags.  */
 329   unsigned long flags;
 330
 331   /* The storage mapping class.  */
 332   unsigned char smclas;
 333 };
 334
 335 /*  Flags for xcoff_link_hash_entry.  */
 336
 337 /* Symbol is referenced by a regular object. */
 338 #define XCOFF_REF_REGULAR      0x00000001
 339 /* Symbol is defined by a regular object. */
 340 #define XCOFF_DEF_REGULAR      0x00000002
 341 /* Symbol is defined by a dynamic object. */
 342 #define XCOFF_DEF_DYNAMIC      0x00000004
 343 /* Symbol is used in a reloc being copied into the .loader section.  */
 344 #define XCOFF_LDREL            0x00000008
 345 /* Symbol is the entry point.  */
 346 #define XCOFF_ENTRY            0x00000010
 347 /* Symbol is for a function and is the target of a relocation.
 348    The relocation may or may not be a branch-type relocation.  */
 349 #define XCOFF_CALLED           0x00000020
 350 /* Symbol needs the TOC entry filled in.  */
 351 #define XCOFF_SET_TOC          0x00000040
 352 /* Symbol is implicitly or explicitly imported.  */
 353 #define XCOFF_IMPORT           0x00000080
 354 /* Symbol is explicitly exported.  */
 355 #define XCOFF_EXPORT           0x00000100
 356 /* Symbol has been processed by xcoff_build_ldsyms.  */
 357 #define XCOFF_BUILT_LDSYM      0x00000200
 358 /* Symbol is mentioned by a section which was not garbage collected. */
 359 #define XCOFF_MARK             0x00000400
 360 /* Symbol size is recorded in size_list list from hash table.  */
 361 #define XCOFF_HAS_SIZE         0x00000800
 362 /* Symbol is a function descriptor.  */
 363 #define XCOFF_DESCRIPTOR       0x00001000
 364 /* Multiple definitions have been for the symbol. */
 365 #define XCOFF_MULTIPLY_DEFINED 0x00002000
 366 /* Symbol is the __rtinit symbol.  */
 367 #define XCOFF_RTINIT           0x00004000
 368 /* Symbol is an imported 32 bit syscall.  */
 369 #define XCOFF_SYSCALL32        0x00008000
 370 /* Symbol is an imported 64 bit syscall.  */
 371 #define XCOFF_SYSCALL64        0x00010000
 372 /* Symbol was not explicitly defined by the time it was marked.  */
 373 #define XCOFF_WAS_UNDEFINED    0x00020000
 374 /* We have assigned an output XCOFF entry to this symbol.  */
 375 #define XCOFF_ALLOCATED        0x00040000
 376
 377 /* The XCOFF linker hash table.  */
 378
 379 #define XCOFF_NUMBER_OF_SPECIAL_SECTIONS 6
 380 #define XCOFF_SPECIAL_SECTION_TEXT       0
 381 #define XCOFF_SPECIAL_SECTION_ETEXT      1
 382 #define XCOFF_SPECIAL_SECTION_DATA       2
 383 #define XCOFF_SPECIAL_SECTION_EDATA      3
 384 #define XCOFF_SPECIAL_SECTION_END        4
 385 #define XCOFF_SPECIAL_SECTION_END2       5
 386
 387 /* These flags indicate which of -bexpall and -bexpfull are in effect.  */
 388 #define XCOFF_EXPALL 1
 389 #define XCOFF_EXPFULL 2
 390
 391 /* This structure is used to pass information through
 392    xcoff_link_hash_traverse.  */
 393
 394 struct xcoff_loader_info
 395 {
 396   /* Set if a problem occurred.  */
 397   bfd_boolean failed;
 398
 399   /* Output BFD.  */
 400   bfd *output_bfd;
 401
 402   /* Link information structure.  */
 403   struct bfd_link_info *info;
 404
 405   /* A mask of XCOFF_EXPALL and XCOFF_EXPFULL flags.  */
 406   unsigned int auto_export_flags;
 407
 408   /* Number of ldsym structures.  */
 409   size_t ldsym_count;
 410
 411   /* Size of string table.  */
 412   size_t string_size;
 413
 414   /* String table.  */
 415   char *strings;
 416
 417   /* Allocated size of string table.  */
 418   size_t string_alc;
 419 };
 420
 421 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
 422    from smaller values.  Start with zero, widen, *then* decrement.  */
 423 #define MINUS_ONE       (((bfd_vma) 0) - 1)
 424
 425 /* __rtinit, from /usr/include/rtinit.h.  */
 426 struct __rtinit
 427 {
 428   /* Pointer to runtime linker.
 429      XXX: Is the parameter really void?  */
 430   int   (*rtl) (void);
 431
 432   /* Offset to array of init functions, 0 if none. */
 433   int   init_offset;
 434
 435   /* Offset to array of fini functions, 0 if none. */
 436   int   fini_offset;
 437
 438   /* Size of __RTINIT_DESCRIPTOR. This value should be used instead of
 439      sizeof(__RTINIT_DESCRIPTOR). */
 440   int   __rtinit_descriptor_size;
 441 };
 442
 443 #define RTINIT_DESCRIPTOR_SIZE (12)
 444
 445 struct __rtinit_descriptor
 446 {
 447   /* Init/fini function. */
 448   int   f;
 449
 450   /* Offset, relative to the start of the __rtinit symbol, to name of the
 451      function. */
 452
 453   int   name_offset;
 454
 455   /* Flags */
 456   unsigned char flags;
 457 };
 458
 459 /* Archive */
 460
 461 #define XCOFFARMAG    "<aiaff>\012"
 462 #define XCOFFARMAGBIG "<bigaf>\012"
 463 #define SXCOFFARMAG   8
 464
 465 /* The size of the ascii archive elements */
 466 #define XCOFFARMAG_ELEMENT_SIZE 12
 467 #define XCOFFARMAGBIG_ELEMENT_SIZE 20
 468
 469 /* This terminates an XCOFF archive member name.  */
 470
 471 #define XCOFFARFMAG "`\012"
 472 #define SXCOFFARFMAG 2
 473
 474 /* XCOFF archives start with this (printable) structure.  */
 475
 476 struct xcoff_ar_file_hdr
 477 {
 478   /* Magic string.  */
 479   char magic[SXCOFFARMAG];
 480
 481   /* Offset of the member table (decimal ASCII string).  */
 482   char memoff[XCOFFARMAG_ELEMENT_SIZE];
 483
 484   /* Offset of the global symbol table (decimal ASCII string).  */
 485   char symoff[XCOFFARMAG_ELEMENT_SIZE];
 486
 487   /* Offset of the first member in the archive (decimal ASCII string).  */
 488   char firstmemoff[XCOFFARMAG_ELEMENT_SIZE];
 489
 490   /* Offset of the last member in the archive (decimal ASCII string).  */
 491   char lastmemoff[XCOFFARMAG_ELEMENT_SIZE];
 492
 493   /* Offset of the first member on the free list (decimal ASCII
 494      string).  */
 495   char freeoff[XCOFFARMAG_ELEMENT_SIZE];
 496 };
 497
 498 #define SIZEOF_AR_FILE_HDR (SXCOFFARMAG + 5 * XCOFFARMAG_ELEMENT_SIZE)
 499
 500 /* This is the equivalent data structure for the big archive format.  */
 501
 502 struct xcoff_ar_file_hdr_big
 503 {
 504   /* Magic string.  */
 505   char magic[SXCOFFARMAG];
 506
 507   /* Offset of the member table (decimal ASCII string).  */
 508   char memoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 509
 510   /* Offset of the global symbol table for 32-bit objects (decimal ASCII
 511      string).  */
 512   char symoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 513
 514   /* Offset of the global symbol table for 64-bit objects (decimal ASCII
 515      string).  */
 516   char symoff64[XCOFFARMAGBIG_ELEMENT_SIZE];
 517
 518   /* Offset of the first member in the archive (decimal ASCII string).  */
 519   char firstmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 520
 521   /* Offset of the last member in the archive (decimal ASCII string).  */
 522   char lastmemoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 523
 524   /* Offset of the first member on the free list (decimal ASCII
 525      string).  */
 526   char freeoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 527 };
 528
 529 #define SIZEOF_AR_FILE_HDR_BIG (SXCOFFARMAG + 6 * XCOFFARMAGBIG_ELEMENT_SIZE)
 530
 531 /* Each XCOFF archive member starts with this (printable) structure.  */
 532
 533 struct xcoff_ar_hdr
 534 {
 535   /* File size not including the header (decimal ASCII string).  */
 536   char size[XCOFFARMAG_ELEMENT_SIZE];
 537
 538   /* File offset of next archive member (decimal ASCII string).  */
 539   char nextoff[XCOFFARMAG_ELEMENT_SIZE];
 540
 541   /* File offset of previous archive member (decimal ASCII string).  */
 542   char prevoff[XCOFFARMAG_ELEMENT_SIZE];
 543
 544   /* File mtime (decimal ASCII string).  */
 545   char date[12];
 546
 547   /* File UID (decimal ASCII string).  */
 548   char uid[12];
 549
 550   /* File GID (decimal ASCII string).  */
 551   char gid[12];
 552
 553   /* File mode (octal ASCII string).  */
 554   char mode[12];
 555
 556   /* Length of file name (decimal ASCII string).  */
 557   char namlen[4];
 558
 559   /* This structure is followed by the file name.  The length of the
 560      name is given in the namlen field.  If the length of the name is
 561      odd, the name is followed by a null byte.  The name and optional
 562      null byte are followed by XCOFFARFMAG, which is not included in
 563      namlen.  The contents of the archive member follow; the number of
 564      bytes is given in the size field.  */
 565 };
 566
 567 #define SIZEOF_AR_HDR (3 * XCOFFARMAG_ELEMENT_SIZE + 4 * 12 + 4)
 568
 569 /* The equivalent for the big archive format.  */
 570
 571 struct xcoff_ar_hdr_big
 572 {
 573   /* File size not including the header (decimal ASCII string).  */
 574   char size[XCOFFARMAGBIG_ELEMENT_SIZE];
 575
 576   /* File offset of next archive member (decimal ASCII string).  */
 577   char nextoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 578
 579   /* File offset of previous archive member (decimal ASCII string).  */
 580   char prevoff[XCOFFARMAGBIG_ELEMENT_SIZE];
 581
 582   /* File mtime (decimal ASCII string).  */
 583   char date[12];
 584
 585   /* File UID (decimal ASCII string).  */
 586   char uid[12];
 587
 588   /* File GID (decimal ASCII string).  */
 589   char gid[12];
 590
 591   /* File mode (octal ASCII string).  */
 592   char mode[12];
 593
 594   /* Length of file name (decimal ASCII string).  */
 595   char namlen[4];
 596
 597   /* This structure is followed by the file name.  The length of the
 598      name is given in the namlen field.  If the length of the name is
 599      odd, the name is followed by a null byte.  The name and optional
 600      null byte are followed by XCOFFARFMAG, which is not included in
 601      namlen.  The contents of the archive member follow; the number of
 602      bytes is given in the size field.  */
 603 };
 604
 605 #define SIZEOF_AR_HDR_BIG (3 * XCOFFARMAGBIG_ELEMENT_SIZE + 4 * 12 + 4)
 606
 607 /* We often have to distinguish between the old and big file format.
 608    Make it a bit cleaner.  We can use `xcoff_ardata' here because the
 609    `hdr' member has the same size and position in both formats.
 610    <bigaf> is the default format, return TRUE even when xcoff_ardata is
 611    NULL. */
 612 #ifndef SMALL_ARCHIVE
 613 /* Creates big archives by default */
 614 #define xcoff_big_format_p(abfd) \
 615   ((NULL != bfd_ardata (abfd) && NULL == xcoff_ardata (abfd)) || \
 616    ((NULL != bfd_ardata (abfd)) && \
 617     (NULL != xcoff_ardata (abfd)) && \
 618     (xcoff_ardata (abfd)->magic[1] == 'b')))
 619 #else
 620 /* Creates small archives by default. */
 621 #define xcoff_big_format_p(abfd) \
 622   (((NULL != bfd_ardata (abfd)) && \
 623     (NULL != xcoff_ardata (abfd)) && \
 624     (xcoff_ardata (abfd)->magic[1] == 'b')))
 625 #endif
 626
 627 /* We store a copy of the xcoff_ar_file_hdr in the tdata field of the
 628    artdata structure.  Similar for the big archive.  */
 629 #define xcoff_ardata(abfd) \
 630   ((struct xcoff_ar_file_hdr *) bfd_ardata (abfd)->tdata)
 631 #define xcoff_ardata_big(abfd) \
 632   ((struct xcoff_ar_file_hdr_big *) bfd_ardata (abfd)->tdata)
 633
 634 /* We store a copy of the xcoff_ar_hdr in the arelt_data field of an
 635    archive element.  Similar for the big archive.  */
 636 #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data))
 637 #define arch_xhdr(bfd) \
 638   ((struct xcoff_ar_hdr *) arch_eltdata (bfd)->arch_header)
 639 #define arch_xhdr_big(bfd) \
 640   ((struct xcoff_ar_hdr_big *) arch_eltdata (bfd)->arch_header)
 641
 642 /* True if symbols of class CLASS are external.  */
 643 #define EXTERN_SYM_P(CLASS) \
 644   ((CLASS) == C_EXT || (CLASS) == C_AIX_WEAKEXT)
 645
 646 #endif /* _INTERNAL_XCOFF_H */