include/aout/aout64.h

   1 /* `a.out' object-file definitions, including extensions to 64-bit fields
   2
   3    Copyright 2001 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef __A_OUT_64_H__
  20 #define __A_OUT_64_H__
  21
  22 /* This is the layout on disk of the 32-bit or 64-bit exec header. */
  23
  24 #ifndef external_exec
  25 struct external_exec
  26 {
  27   bfd_byte e_info[4];           /* magic number and stuff               */
  28   bfd_byte e_text[BYTES_IN_WORD]; /* length of text section in bytes    */
  29   bfd_byte e_data[BYTES_IN_WORD]; /* length of data section in bytes    */
  30   bfd_byte e_bss[BYTES_IN_WORD]; /* length of bss area in bytes                 */
  31   bfd_byte e_syms[BYTES_IN_WORD]; /* length of symbol table in bytes    */
  32   bfd_byte e_entry[BYTES_IN_WORD]; /* start address                     */
  33   bfd_byte e_trsize[BYTES_IN_WORD]; /* length of text relocation info   */
  34   bfd_byte e_drsize[BYTES_IN_WORD]; /* length of data relocation info   */
  35 };
  36
  37 #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
  38
  39 /* Magic numbers for a.out files */
  40
  41 #if ARCH_SIZE==64
  42 #define OMAGIC 0x1001           /* Code indicating object file  */
  43 #define ZMAGIC 0x1002           /* Code indicating demand-paged executable.  */
  44 #define NMAGIC 0x1003           /* Code indicating pure executable.  */
  45
  46 /* There is no 64-bit QMAGIC as far as I know.  */
  47
  48 #define N_BADMAG(x)       (N_MAGIC(x) != OMAGIC         \
  49                         && N_MAGIC(x) != NMAGIC         \
  50                         && N_MAGIC(x) != ZMAGIC)
  51 #else
  52 #define OMAGIC 0407             /* ...object file or impure executable.  */
  53 #define NMAGIC 0410             /* Code indicating pure executable.  */
  54 #define ZMAGIC 0413             /* Code indicating demand-paged executable.  */
  55 #define BMAGIC 0415             /* Used by a b.out object.  */
  56
  57 /* This indicates a demand-paged executable with the header in the text.
  58    It is used by 386BSD (and variants) and Linux, at least.  */
  59 #ifndef QMAGIC
  60 #define QMAGIC 0314
  61 #endif
  62 # ifndef N_BADMAG
  63 #  define N_BADMAG(x)     (N_MAGIC(x) != OMAGIC         \
  64                         && N_MAGIC(x) != NMAGIC         \
  65                         && N_MAGIC(x) != ZMAGIC \
  66                         && N_MAGIC(x) != QMAGIC)
  67 # endif /* N_BADMAG */
  68 #endif
  69
  70 #endif
  71
  72 #ifdef QMAGIC
  73 #define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC)
  74 #else
  75 #define N_IS_QMAGIC(x) (0)
  76 #endif
  77
  78 /* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is
  79    the finest granularity at which you can page something, thus it
  80    controls the padding (if any) before the text segment of a ZMAGIC
  81    file.  N_SEGSIZE is the resolution at which things can be marked as
  82    read-only versus read/write, so it controls the padding between the
  83    text segment and the data segment (in memory; on disk the padding
  84    between them is TARGET_PAGE_SIZE).  TARGET_PAGE_SIZE and N_SEGSIZE are the same
  85    for most machines, but different for sun3.  */
  86
  87 /* By default, segment size is constant.  But some machines override this
  88    to be a function of the a.out header (e.g. machine type).  */
  89
  90 #ifndef N_SEGSIZE
  91 #define N_SEGSIZE(x)    SEGMENT_SIZE
  92 #endif
  93 \f
  94 /* Virtual memory address of the text section.
  95    This is getting very complicated.  A good reason to discard a.out format
  96    for something that specifies these fields explicitly.  But til then...
  97
  98    * OMAGIC and NMAGIC files:
  99        (object files: text for "relocatable addr 0" right after the header)
 100        start at 0, offset is EXEC_BYTES_SIZE, size as stated.
 101    * The text address, offset, and size of ZMAGIC files depend
 102      on the entry point of the file:
 103      * entry point below TEXT_START_ADDR:
 104        (hack for SunOS shared libraries)
 105        start at 0, offset is 0, size as stated.
 106      * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
 107        case when the entry point is EXEC_BYTES_SIZE or further into a page):
 108        no padding is needed; text can start after exec header.  Sun
 109        considers the text segment of such files to include the exec header;
 110        for BFD's purposes, we don't, which makes more work for us.
 111        start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
 112        size as stated minus EXEC_BYTES_SIZE.
 113      * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
 114        the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
 115        aligned)): (padding is needed so that text can start at a page boundary)
 116        start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated.
 117
 118     Specific configurations may want to hardwire N_HEADER_IN_TEXT,
 119     for efficiency or to allow people to play games with the entry point.
 120     In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
 121     and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
 122     (Do this in the appropriate bfd target file.)
 123     (The default is a heuristic that will break if people try changing
 124     the entry point, perhaps with the ld -e flag.)
 125
 126     * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true,
 127     and for which the starting address is TARGET_PAGE_SIZE (or should this be
 128     SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC).
 129     */
 130
 131 /* This macro is only relevant for ZMAGIC files; QMAGIC always has the header
 132    in the text.  */
 133 #ifndef N_HEADER_IN_TEXT
 134 #define N_HEADER_IN_TEXT(x) \
 135   (((x).a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
 136 #endif
 137
 138 /* Sun shared libraries, not linux.  This macro is only relevant for ZMAGIC
 139    files.  */
 140 #ifndef N_SHARED_LIB
 141 #if defined (TEXT_START_ADDR) && TEXT_START_ADDR == 0
 142 #define N_SHARED_LIB(x) (0)
 143 #else
 144 #define N_SHARED_LIB(x) ((x).a_entry < TEXT_START_ADDR)
 145 #endif
 146 #endif
 147
 148 /* Returning 0 not TEXT_START_ADDR for OMAGIC and NMAGIC is based on
 149    the assumption that we are dealing with a .o file, not an
 150    executable.  This is necessary for OMAGIC (but means we don't work
 151    right on the output from ld -N); more questionable for NMAGIC.  */
 152
 153 #ifndef N_TXTADDR
 154 #define N_TXTADDR(x) \
 155     (/* The address of a QMAGIC file is always one page in, */          \
 156      /* with the header in the text.  */                                \
 157      N_IS_QMAGIC (x)                                                    \
 158      ? (bfd_vma) TARGET_PAGE_SIZE + EXEC_BYTES_SIZE                     \
 159      : (N_MAGIC (x) != ZMAGIC                                           \
 160         ? (bfd_vma) 0   /* object file or NMAGIC */                     \
 161         : (N_SHARED_LIB (x)                                             \
 162            ? (bfd_vma) 0                                                \
 163            : (N_HEADER_IN_TEXT (x)                                      \
 164               ? (bfd_vma) TEXT_START_ADDR + EXEC_BYTES_SIZE             \
 165               : (bfd_vma) TEXT_START_ADDR))))
 166 #endif
 167
 168 /* If N_HEADER_IN_TEXT is not true for ZMAGIC, there is some padding
 169    to make the text segment start at a certain boundary.  For most
 170    systems, this boundary is TARGET_PAGE_SIZE.  But for Linux, in the
 171    time-honored tradition of crazy ZMAGIC hacks, it is 1024 which is
 172    not what TARGET_PAGE_SIZE needs to be for QMAGIC.  */
 173
 174 #ifndef ZMAGIC_DISK_BLOCK_SIZE
 175 #define ZMAGIC_DISK_BLOCK_SIZE TARGET_PAGE_SIZE
 176 #endif
 177
 178 #define N_DISK_BLOCK_SIZE(x) \
 179   (N_MAGIC(x) == ZMAGIC ? ZMAGIC_DISK_BLOCK_SIZE : TARGET_PAGE_SIZE)
 180
 181 /* Offset in an a.out of the start of the text section. */
 182 #ifndef N_TXTOFF
 183 #define N_TXTOFF(x)                                                     \
 184     (/* For {O,N,Q}MAGIC, no padding.  */                               \
 185      N_MAGIC (x) != ZMAGIC                                              \
 186      ? EXEC_BYTES_SIZE                                                  \
 187      : (N_SHARED_LIB (x)                                                \
 188         ? 0                                                             \
 189         : (N_HEADER_IN_TEXT (x)                                         \
 190            ? EXEC_BYTES_SIZE            /* no padding */                \
 191            : ZMAGIC_DISK_BLOCK_SIZE     /* a page of padding */)))
 192 #endif
 193 /* Size of the text section.  It's always as stated, except that we
 194    offset it to `undo' the adjustment to N_TXTADDR and N_TXTOFF
 195    for ZMAGIC files that nominally include the exec header
 196    as part of the first page of text.  (BFD doesn't consider the
 197    exec header to be part of the text segment.)  */
 198 #ifndef N_TXTSIZE
 199 #define N_TXTSIZE(x) \
 200   (/* For QMAGIC, we don't consider the header part of the text section.  */\
 201    N_IS_QMAGIC (x)                                                      \
 202    ? (x).a_text - EXEC_BYTES_SIZE                                       \
 203    : ((N_MAGIC (x) != ZMAGIC || N_SHARED_LIB (x))                       \
 204       ? (x).a_text                                                      \
 205       : (N_HEADER_IN_TEXT (x)                                           \
 206          ? (x).a_text - EXEC_BYTES_SIZE /* no padding */                \
 207          : (x).a_text                   /* a page of padding */ )))
 208 #endif
 209 /* The address of the data segment in virtual memory.
 210    It is the text segment address, plus text segment size, rounded
 211    up to a N_SEGSIZE boundary for pure or pageable files. */
 212 #ifndef N_DATADDR
 213 #define N_DATADDR(x) \
 214   (N_MAGIC (x) == OMAGIC                                                \
 215    ? (N_TXTADDR (x) + N_TXTSIZE (x))                                    \
 216    : (N_SEGSIZE (x) + ((N_TXTADDR (x) + N_TXTSIZE (x) - 1)              \
 217                        & ~ (bfd_vma) (N_SEGSIZE (x) - 1))))
 218 #endif
 219 /* The address of the BSS segment -- immediately after the data segment.  */
 220
 221 #define N_BSSADDR(x)    (N_DATADDR (x) + (x).a_data)
 222
 223 /* Offsets of the various portions of the file after the text segment.  */
 224
 225 /* For {Q,Z}MAGIC, there is padding to make the data segment start on
 226    a page boundary.  Most of the time the a_text field (and thus
 227    N_TXTSIZE) already contains this padding.  It is possible that for
 228    BSDI and/or 386BSD it sometimes doesn't contain the padding, and
 229    perhaps we should be adding it here.  But this seems kind of
 230    questionable and probably should be BSDI/386BSD-specific if we do
 231    do it.
 232
 233    For NMAGIC (at least for hp300 BSD, probably others), there is
 234    padding in memory only, not on disk, so we must *not* ever pad here
 235    for NMAGIC.  */
 236
 237 #ifndef N_DATOFF
 238 #define N_DATOFF(x)     ( N_TXTOFF (x) + N_TXTSIZE (x) )
 239 #endif
 240 #ifndef N_TRELOFF
 241 #define N_TRELOFF(x)    ( N_DATOFF (x) + (x).a_data )
 242 #endif
 243 #ifndef N_DRELOFF
 244 #define N_DRELOFF(x)    ( N_TRELOFF (x) + (x).a_trsize )
 245 #endif
 246 #ifndef N_SYMOFF
 247 #define N_SYMOFF(x)     ( N_DRELOFF (x) + (x).a_drsize )
 248 #endif
 249 #ifndef N_STROFF
 250 #define N_STROFF(x)     ( N_SYMOFF (x) + (x).a_syms )
 251 #endif
 252 \f
 253 /* Symbols */
 254 #ifndef external_nlist
 255 struct external_nlist {
 256   bfd_byte e_strx[BYTES_IN_WORD];       /* index into string table of name */
 257   bfd_byte e_type[1];                   /* type of symbol */
 258   bfd_byte e_other[1];                  /* misc info (usually empty) */
 259   bfd_byte e_desc[2];                   /* description field */
 260   bfd_byte e_value[BYTES_IN_WORD];      /* value of symbol */
 261 };
 262 #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
 263 #endif
 264
 265 struct internal_nlist {
 266   unsigned long n_strx;                 /* index into string table of name */
 267   unsigned char n_type;                 /* type of symbol */
 268   unsigned char n_other;                /* misc info (usually empty) */
 269   unsigned short n_desc;                /* description field */
 270   bfd_vma n_value;                      /* value of symbol */
 271 };
 272
 273 /* The n_type field is the symbol type, containing:  */
 274
 275 #define N_UNDF  0       /* Undefined symbol */
 276 #define N_ABS   2       /* Absolute symbol -- defined at particular addr */
 277 #define N_TEXT  4       /* Text sym -- defined at offset in text seg */
 278 #define N_DATA  6       /* Data sym -- defined at offset in data seg */
 279 #define N_BSS   8       /* BSS  sym -- defined at offset in zero'd seg */
 280 #define N_COMM  0x12    /* Common symbol (visible after shared lib dynlink) */
 281 #define N_FN    0x1f    /* File name of .o file */
 282 #define N_FN_SEQ 0x0C   /* N_FN from Sequent compilers (sigh) */
 283 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
 284    N_DATA, or N_BSS.  When the low-order bit of other types is set,
 285    (e.g. N_WARNING versus N_FN), they are two different types.  */
 286 #define N_EXT   1       /* External symbol (as opposed to local-to-this-file) */
 287 #define N_TYPE  0x1e
 288 #define N_STAB  0xe0    /* If any of these bits are on, it's a debug symbol */
 289
 290 #define N_INDR 0x0a
 291
 292 /* The following symbols refer to set elements.
 293    All the N_SET[ATDB] symbols with the same name form one set.
 294    Space is allocated for the set in the text section, and each set
 295    elements value is stored into one word of the space.
 296    The first word of the space is the length of the set (number of elements).
 297
 298    The address of the set is made into an N_SETV symbol
 299    whose name is the same as the name of the set.
 300    This symbol acts like a N_DATA global symbol
 301    in that it can satisfy undefined external references.  */
 302
 303 /* These appear as input to LD, in a .o file.  */
 304 #define N_SETA  0x14            /* Absolute set element symbol */
 305 #define N_SETT  0x16            /* Text set element symbol */
 306 #define N_SETD  0x18            /* Data set element symbol */
 307 #define N_SETB  0x1A            /* Bss set element symbol */
 308
 309 /* This is output from LD.  */
 310 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 311
 312 /* Warning symbol. The text gives a warning message, the next symbol
 313    in the table will be undefined. When the symbol is referenced, the
 314    message is printed.  */
 315
 316 #define N_WARNING 0x1e
 317
 318 /* Weak symbols.  These are a GNU extension to the a.out format.  The
 319    semantics are those of ELF weak symbols.  Weak symbols are always
 320    externally visible.  The N_WEAK? values are squeezed into the
 321    available slots.  The value of a N_WEAKU symbol is 0.  The values
 322    of the other types are the definitions.  */
 323 #define N_WEAKU 0x0d            /* Weak undefined symbol.  */
 324 #define N_WEAKA 0x0e            /* Weak absolute symbol.  */
 325 #define N_WEAKT 0x0f            /* Weak text symbol.  */
 326 #define N_WEAKD 0x10            /* Weak data symbol.  */
 327 #define N_WEAKB 0x11            /* Weak bss symbol.  */
 328
 329 /* Relocations
 330
 331   There are two types of relocation flavours for a.out systems,
 332   standard and extended. The standard form is used on systems where the
 333   instruction has room for all the bits of an offset to the operand, whilst
 334   the extended form is used when an address operand has to be split over n
 335   instructions. Eg, on the 68k, each move instruction can reference
 336   the target with a displacement of 16 or 32 bits. On the sparc, move
 337   instructions use an offset of 14 bits, so the offset is stored in
 338   the reloc field, and the data in the section is ignored.
 339 */
 340
 341 /* This structure describes a single relocation to be performed.
 342    The text-relocation section of the file is a vector of these structures,
 343    all of which apply to the text section.
 344    Likewise, the data-relocation section applies to the data section.  */
 345
 346 struct reloc_std_external {
 347   bfd_byte      r_address[BYTES_IN_WORD];       /* offset of of data to relocate        */
 348   bfd_byte r_index[3];  /* symbol table index of symbol         */
 349   bfd_byte r_type[1];   /* relocation type                      */
 350 };
 351
 352 #define RELOC_STD_BITS_PCREL_BIG        ((unsigned int) 0x80)
 353 #define RELOC_STD_BITS_PCREL_LITTLE     ((unsigned int) 0x01)
 354
 355 #define RELOC_STD_BITS_LENGTH_BIG       ((unsigned int) 0x60)
 356 #define RELOC_STD_BITS_LENGTH_SH_BIG    5
 357 #define RELOC_STD_BITS_LENGTH_LITTLE    ((unsigned int) 0x06)
 358 #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
 359
 360 #define RELOC_STD_BITS_EXTERN_BIG       ((unsigned int) 0x10)
 361 #define RELOC_STD_BITS_EXTERN_LITTLE    ((unsigned int) 0x08)
 362
 363 #define RELOC_STD_BITS_BASEREL_BIG      ((unsigned int) 0x08)
 364 #define RELOC_STD_BITS_BASEREL_LITTLE   ((unsigned int) 0x10)
 365
 366 #define RELOC_STD_BITS_JMPTABLE_BIG     ((unsigned int) 0x04)
 367 #define RELOC_STD_BITS_JMPTABLE_LITTLE  ((unsigned int) 0x20)
 368
 369 #define RELOC_STD_BITS_RELATIVE_BIG     ((unsigned int) 0x02)
 370 #define RELOC_STD_BITS_RELATIVE_LITTLE  ((unsigned int) 0x40)
 371
 372 #define RELOC_STD_SIZE  (BYTES_IN_WORD + 3 + 1)         /* Bytes per relocation entry */
 373
 374 struct reloc_std_internal
 375 {
 376   bfd_vma r_address;            /* Address (within segment) to be relocated.  */
 377   /* The meaning of r_symbolnum depends on r_extern.  */
 378   unsigned int r_symbolnum:24;
 379   /* Nonzero means value is a pc-relative offset
 380      and it should be relocated for changes in its own address
 381      as well as for changes in the symbol or section specified.  */
 382   unsigned int r_pcrel:1;
 383   /* Length (as exponent of 2) of the field to be relocated.
 384      Thus, a value of 2 indicates 1<<2 bytes.  */
 385   unsigned int r_length:2;
 386   /* 1 => relocate with value of symbol.
 387      r_symbolnum is the index of the symbol
 388      in files the symbol table.
 389      0 => relocate with the address of a segment.
 390      r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 391      (the N_EXT bit may be set also, but signifies nothing).  */
 392   unsigned int r_extern:1;
 393   /* The next three bits are for SunOS shared libraries, and seem to
 394      be undocumented.  */
 395   unsigned int r_baserel:1;     /* Linkage table relative */
 396   unsigned int r_jmptable:1;    /* pc-relative to jump table */
 397   unsigned int r_relative:1;    /* "relative relocation" */
 398   /* unused */
 399   unsigned int r_pad:1;         /* Padding -- set to zero */
 400 };
 401
 402
 403 /* EXTENDED RELOCS  */
 404
 405 struct reloc_ext_external {
 406   bfd_byte r_address[BYTES_IN_WORD];    /* offset of of data to relocate        */
 407   bfd_byte r_index[3];  /* symbol table index of symbol         */
 408   bfd_byte r_type[1];   /* relocation type                      */
 409   bfd_byte r_addend[BYTES_IN_WORD];     /* datum addend                         */
 410 };
 411
 412 #ifndef RELOC_EXT_BITS_EXTERN_BIG
 413 #define RELOC_EXT_BITS_EXTERN_BIG       ((unsigned int) 0x80)
 414 #endif
 415
 416 #ifndef RELOC_EXT_BITS_EXTERN_LITTLE
 417 #define RELOC_EXT_BITS_EXTERN_LITTLE    ((unsigned int) 0x01)
 418 #endif
 419
 420 #ifndef RELOC_EXT_BITS_TYPE_BIG
 421 #define RELOC_EXT_BITS_TYPE_BIG         ((unsigned int) 0x1F)
 422 #endif
 423
 424 #ifndef RELOC_EXT_BITS_TYPE_SH_BIG
 425 #define RELOC_EXT_BITS_TYPE_SH_BIG      0
 426 #endif
 427
 428 #ifndef RELOC_EXT_BITS_TYPE_LITTLE
 429 #define RELOC_EXT_BITS_TYPE_LITTLE      ((unsigned int) 0xF8)
 430 #endif
 431
 432 #ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE
 433 #define RELOC_EXT_BITS_TYPE_SH_LITTLE   3
 434 #endif
 435
 436 /* Bytes per relocation entry */
 437 #define RELOC_EXT_SIZE  (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
 438
 439 enum reloc_type
 440 {
 441   /* simple relocations */
 442   RELOC_8,                      /* data[0:7] = addend + sv              */
 443   RELOC_16,                     /* data[0:15] = addend + sv             */
 444   RELOC_32,                     /* data[0:31] = addend + sv             */
 445   /* pc-rel displacement */
 446   RELOC_DISP8,                  /* data[0:7] = addend - pc + sv         */
 447   RELOC_DISP16,                 /* data[0:15] = addend - pc + sv        */
 448   RELOC_DISP32,                 /* data[0:31] = addend - pc + sv        */
 449   /* Special */
 450   RELOC_WDISP30,                /* data[0:29] = (addend + sv - pc)>>2   */
 451   RELOC_WDISP22,                /* data[0:21] = (addend + sv - pc)>>2   */
 452   RELOC_HI22,                   /* data[0:21] = (addend + sv)>>10       */
 453   RELOC_22,                     /* data[0:21] = (addend + sv)           */
 454   RELOC_13,                     /* data[0:12] = (addend + sv)           */
 455   RELOC_LO10,                   /* data[0:9] = (addend + sv)            */
 456   RELOC_SFA_BASE,
 457   RELOC_SFA_OFF13,
 458   /* P.I.C. (base-relative) */
 459   RELOC_BASE10,                 /* Not sure - maybe we can do this the */
 460   RELOC_BASE13,                 /* right way now */
 461   RELOC_BASE22,
 462   /* for some sort of pc-rel P.I.C. (?) */
 463   RELOC_PC10,
 464   RELOC_PC22,
 465   /* P.I.C. jump table */
 466   RELOC_JMP_TBL,
 467   /* reputedly for shared libraries somehow */
 468   RELOC_SEGOFF16,
 469   RELOC_GLOB_DAT,
 470   RELOC_JMP_SLOT,
 471   RELOC_RELATIVE,
 472
 473   RELOC_11,
 474   RELOC_WDISP2_14,
 475   RELOC_WDISP19,
 476   RELOC_HHI22,                  /* data[0:21] = (addend + sv) >> 42     */
 477   RELOC_HLO10,                  /* data[0:9] = (addend + sv) >> 32      */
 478
 479   /* 29K relocation types */
 480   RELOC_JUMPTARG,
 481   RELOC_CONST,
 482   RELOC_CONSTH,
 483
 484   /* All the new ones I can think of, for sparc v9 */
 485
 486   RELOC_64,                     /* data[0:63] = addend + sv             */
 487   RELOC_DISP64,                 /* data[0:63] = addend - pc + sv        */
 488   RELOC_WDISP21,                /* data[0:20] = (addend + sv - pc)>>2   */
 489   RELOC_DISP21,                 /* data[0:20] = addend - pc + sv        */
 490   RELOC_DISP14,                 /* data[0:13] = addend - pc + sv        */
 491   /* Q .
 492      What are the other ones,
 493      Since this is a clean slate, can we throw away the ones we dont
 494      understand ? Should we sort the values ? What about using a
 495      microcode format like the 68k ?
 496      */
 497   NO_RELOC
 498   };
 499
 500
 501 struct reloc_internal {
 502   bfd_vma r_address;            /* offset of of data to relocate        */
 503   long  r_index;                /* symbol table index of symbol         */
 504   enum reloc_type r_type;       /* relocation type                      */
 505   bfd_vma r_addend;             /* datum addend                         */
 506 };
 507
 508 /* Q.
 509    Should the length of the string table be 4 bytes or 8 bytes ?
 510
 511    Q.
 512    What about archive indexes ?
 513
 514  */
 515
 516 #endif                          /* __A_OUT_64_H__ */