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      1 /* Internal format of XCOFF object file data structures for BFD.
      2 
      3    Copyright (C) 1995-2014 Free Software Foundation, Inc.
      4    Written by Ian Lance Taylor <ian (at) 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 */
    647