include/aout/aout64.h

   1 /* `a.out' object-file definitions, including extensions to 64-bit fields
   2
   3    Copyright (C) 1999-2017 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  18    MA 02110-1301, USA.  */
  19
  20 #ifndef __A_OUT_64_H__
  21 #define __A_OUT_64_H__
  22
  23 #ifndef BYTES_IN_WORD
  24 #define BYTES_IN_WORD 4
  25 #endif
  26
  27 /* This is the layout on disk of the 32-bit or 64-bit exec header.  */
  28
  29 #ifndef external_exec
  30 struct external_exec
  31 {
  32   bfd_byte e_info[4];               /* Magic number and stuff.  */
  33   bfd_byte e_text[BYTES_IN_WORD];   /* Length of text section in bytes.  */
  34   bfd_byte e_data[BYTES_IN_WORD];   /* Length of data section in bytes.  */
  35   bfd_byte e_bss[BYTES_IN_WORD];    /* Length of bss area in bytes.  */
  36   bfd_byte e_syms[BYTES_IN_WORD];   /* Length of symbol table in bytes.  */
  37   bfd_byte e_entry[BYTES_IN_WORD];  /* Start address.  */
  38   bfd_byte e_trsize[BYTES_IN_WORD]; /* Length of text relocation info.  */
  39   bfd_byte e_drsize[BYTES_IN_WORD]; /* Length of data relocation info.  */
  40 };
  41
  42 #define EXEC_BYTES_SIZE (4 + BYTES_IN_WORD * 7)
  43
  44 /* Magic numbers for a.out files.  */
  45
  46 #if ARCH_SIZE==64
  47 #define OMAGIC 0x1001           /* Code indicating object file.  */
  48 #define ZMAGIC 0x1002           /* Code indicating demand-paged executable.  */
  49 #define NMAGIC 0x1003           /* Code indicating pure executable.  */
  50
  51 /* There is no 64-bit QMAGIC as far as I know.  */
  52
  53 #define N_BADMAG(x)       (N_MAGIC(x) != OMAGIC         \
  54                         && N_MAGIC(x) != NMAGIC         \
  55                         && N_MAGIC(x) != ZMAGIC)
  56 #else
  57 #define OMAGIC 0407             /* Object file or impure executable.  */
  58 #define NMAGIC 0410             /* Code indicating pure executable.  */
  59 #define ZMAGIC 0413             /* Code indicating demand-paged executable.  */
  60 #define BMAGIC 0415             /* Used by a b.out object.  */
  61
  62 /* This indicates a demand-paged executable with the header in the text.
  63    It is used by 386BSD (and variants) and Linux, at least.  */
  64 #ifndef QMAGIC
  65 #define QMAGIC 0314
  66 #endif
  67 # ifndef N_BADMAG
  68 #  define N_BADMAG(x)     (N_MAGIC(x) != OMAGIC         \
  69                         && N_MAGIC(x) != NMAGIC         \
  70                         && N_MAGIC(x) != ZMAGIC \
  71                         && N_MAGIC(x) != QMAGIC)
  72 # endif /* N_BADMAG */
  73 #endif
  74
  75 #endif
  76
  77 #ifdef QMAGIC
  78 #define N_IS_QMAGIC(x) (N_MAGIC (x) == QMAGIC)
  79 #else
  80 #define N_IS_QMAGIC(x) (0)
  81 #endif
  82
  83 /* The difference between TARGET_PAGE_SIZE and N_SEGSIZE is that TARGET_PAGE_SIZE is
  84    the finest granularity at which you can page something, thus it
  85    controls the padding (if any) before the text segment of a ZMAGIC
  86    file.  N_SEGSIZE is the resolution at which things can be marked as
  87    read-only versus read/write, so it controls the padding between the
  88    text segment and the data segment (in memory; on disk the padding
  89    between them is TARGET_PAGE_SIZE).  TARGET_PAGE_SIZE and N_SEGSIZE are the same
  90    for most machines, but different for sun3.  */
  91
  92 /* By default, segment size is constant.  But some machines override this
  93    to be a function of the a.out header (e.g. machine type).  */
  94
  95 #ifndef N_SEGSIZE
  96 #define N_SEGSIZE(x)    SEGMENT_SIZE
  97 #endif
  98 \f
  99 /* Virtual memory address of the text section.
 100    This is getting very complicated.  A good reason to discard a.out format
 101    for something that specifies these fields explicitly.  But til then...
 102
 103    * OMAGIC and NMAGIC files:
 104        (object files: text for "relocatable addr 0" right after the header)
 105        start at 0, offset is EXEC_BYTES_SIZE, size as stated.
 106    * The text address, offset, and size of ZMAGIC files depend
 107      on the entry point of the file:
 108      * entry point below TEXT_START_ADDR:
 109        (hack for SunOS shared libraries)
 110        start at 0, offset is 0, size as stated.
 111      * If N_HEADER_IN_TEXT(x) is true (which defaults to being the
 112        case when the entry point is EXEC_BYTES_SIZE or further into a page):
 113        no padding is needed; text can start after exec header.  Sun
 114        considers the text segment of such files to include the exec header;
 115        for BFD's purposes, we don't, which makes more work for us.
 116        start at TEXT_START_ADDR + EXEC_BYTES_SIZE, offset is EXEC_BYTES_SIZE,
 117        size as stated minus EXEC_BYTES_SIZE.
 118      * If N_HEADER_IN_TEXT(x) is false (which defaults to being the case when
 119        the entry point is less than EXEC_BYTES_SIZE into a page (e.g. page
 120        aligned)): (padding is needed so that text can start at a page boundary)
 121        start at TEXT_START_ADDR, offset TARGET_PAGE_SIZE, size as stated.
 122
 123     Specific configurations may want to hardwire N_HEADER_IN_TEXT,
 124     for efficiency or to allow people to play games with the entry point.
 125     In that case, you would #define N_HEADER_IN_TEXT(x) as 1 for sunos,
 126     and as 0 for most other hosts (Sony News, Vax Ultrix, etc).
 127     (Do this in the appropriate bfd target file.)
 128     (The default is a heuristic that will break if people try changing
 129     the entry point, perhaps with the ld -e flag.)
 130
 131     * QMAGIC is always like a ZMAGIC for which N_HEADER_IN_TEXT is true,
 132     and for which the starting address is TARGET_PAGE_SIZE (or should this be
 133     SEGMENT_SIZE?) (TEXT_START_ADDR only applies to ZMAGIC, not to QMAGIC).  */
 134
 135 /* This macro is only relevant for ZMAGIC files; QMAGIC always has the header
 136    in the text.  */
 137 #ifndef N_HEADER_IN_TEXT
 138 #define N_HEADER_IN_TEXT(x) \
 139   (((x)->a_entry & (TARGET_PAGE_SIZE-1)) >= EXEC_BYTES_SIZE)
 140 #endif
 141
 142 /* Sun shared libraries, not linux.  This macro is only relevant for ZMAGIC
 143    files.  */
 144 #ifndef N_SHARED_LIB
 145 #define N_SHARED_LIB(x) (0)
 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 {
 257   bfd_byte e_strx[BYTES_IN_WORD];       /* Index into string table of name.  */
 258   bfd_byte e_type[1];                   /* Type of symbol.  */
 259   bfd_byte e_other[1];                  /* Misc info (usually empty).  */
 260   bfd_byte e_desc[2];                   /* Description field.  */
 261   bfd_byte e_value[BYTES_IN_WORD];      /* Value of symbol.  */
 262 };
 263 #define EXTERNAL_NLIST_SIZE (BYTES_IN_WORD+4+BYTES_IN_WORD)
 264 #endif
 265
 266 struct internal_nlist
 267 {
 268   unsigned long n_strx;                 /* Index into string table of name.  */
 269   unsigned char n_type;                 /* Type of symbol.  */
 270   unsigned char n_other;                /* Misc info (usually empty).  */
 271   unsigned short n_desc;                /* Description field.  */
 272   bfd_vma n_value;                      /* Value of symbol.  */
 273 };
 274
 275 /* The n_type field is the symbol type, containing:  */
 276
 277 #define N_UNDF  0       /* Undefined symbol.  */
 278 #define N_ABS   2       /* Absolute symbol -- defined at particular addr.  */
 279 #define N_TEXT  4       /* Text sym -- defined at offset in text seg.  */
 280 #define N_DATA  6       /* Data sym -- defined at offset in data seg.  */
 281 #define N_BSS   8       /* BSS  sym -- defined at offset in zero'd seg.  */
 282 #define N_COMM  0x12    /* Common symbol (visible after shared lib dynlink).  */
 283 #define N_FN    0x1f    /* File name of .o file.  */
 284 #define N_FN_SEQ 0x0C   /* N_FN from Sequent compilers (sigh).  */
 285 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
 286    N_DATA, or N_BSS.  When the low-order bit of other types is set,
 287    (e.g. N_WARNING versus N_FN), they are two different types.  */
 288 #define N_EXT   1       /* External symbol (as opposed to local-to-this-file).  */
 289 #define N_TYPE  0x1e
 290 #define N_STAB  0xe0    /* If any of these bits are on, it's a debug symbol.  */
 291
 292 #define N_INDR 0x0a
 293
 294 /* The following symbols refer to set elements.
 295    All the N_SET[ATDB] symbols with the same name form one set.
 296    Space is allocated for the set in the text section, and each set
 297    elements value is stored into one word of the space.
 298    The first word of the space is the length of the set (number of elements).
 299
 300    The address of the set is made into an N_SETV symbol
 301    whose name is the same as the name of the set.
 302    This symbol acts like a N_DATA global symbol
 303    in that it can satisfy undefined external references.  */
 304
 305 /* These appear as input to LD, in a .o file.  */
 306 #define N_SETA  0x14            /* Absolute set element symbol.  */
 307 #define N_SETT  0x16            /* Text set element symbol.  */
 308 #define N_SETD  0x18            /* Data set element symbol.  */
 309 #define N_SETB  0x1A            /* Bss set element symbol.  */
 310
 311 /* This is output from LD.  */
 312 #define N_SETV  0x1C            /* Pointer to set vector in data area.  */
 313
 314 /* Warning symbol. The text gives a warning message, the next symbol
 315    in the table will be undefined. When the symbol is referenced, the
 316    message is printed.  */
 317
 318 #define N_WARNING 0x1e
 319
 320 /* Weak symbols.  These are a GNU extension to the a.out format.  The
 321    semantics are those of ELF weak symbols.  Weak symbols are always
 322    externally visible.  The N_WEAK? values are squeezed into the
 323    available slots.  The value of a N_WEAKU symbol is 0.  The values
 324    of the other types are the definitions.  */
 325 #define N_WEAKU 0x0d            /* Weak undefined symbol.  */
 326 #define N_WEAKA 0x0e            /* Weak absolute symbol.  */
 327 #define N_WEAKT 0x0f            /* Weak text symbol.  */
 328 #define N_WEAKD 0x10            /* Weak data symbol.  */
 329 #define N_WEAKB 0x11            /* Weak bss symbol.  */
 330
 331 /* Relocations
 332
 333   There are two types of relocation flavours for a.out systems,
 334   standard and extended. The standard form is used on systems where the
 335   instruction has room for all the bits of an offset to the operand, whilst
 336   the extended form is used when an address operand has to be split over n
 337   instructions. Eg, on the 68k, each move instruction can reference
 338   the target with a displacement of 16 or 32 bits. On the sparc, move
 339   instructions use an offset of 14 bits, so the offset is stored in
 340   the reloc field, and the data in the section is ignored.  */
 341
 342 /* This structure describes a single relocation to be performed.
 343    The text-relocation section of the file is a vector of these structures,
 344    all of which apply to the text section.
 345    Likewise, the data-relocation section applies to the data section.  */
 346
 347 struct reloc_std_external
 348 {
 349   bfd_byte r_address[BYTES_IN_WORD];    /* Offset of data to relocate.  */
 350   bfd_byte r_index[3];                  /* Symbol table index of symbol.  */
 351   bfd_byte r_type[1];                   /* Relocation type.  */
 352 };
 353
 354 #define RELOC_STD_BITS_PCREL_BIG        ((unsigned int) 0x80)
 355 #define RELOC_STD_BITS_PCREL_LITTLE     ((unsigned int) 0x01)
 356
 357 #define RELOC_STD_BITS_LENGTH_BIG       ((unsigned int) 0x60)
 358 #define RELOC_STD_BITS_LENGTH_SH_BIG    5
 359 #define RELOC_STD_BITS_LENGTH_LITTLE    ((unsigned int) 0x06)
 360 #define RELOC_STD_BITS_LENGTH_SH_LITTLE 1
 361
 362 #define RELOC_STD_BITS_EXTERN_BIG       ((unsigned int) 0x10)
 363 #define RELOC_STD_BITS_EXTERN_LITTLE    ((unsigned int) 0x08)
 364
 365 #define RELOC_STD_BITS_BASEREL_BIG      ((unsigned int) 0x08)
 366 #define RELOC_STD_BITS_BASEREL_LITTLE   ((unsigned int) 0x10)
 367
 368 #define RELOC_STD_BITS_JMPTABLE_BIG     ((unsigned int) 0x04)
 369 #define RELOC_STD_BITS_JMPTABLE_LITTLE  ((unsigned int) 0x20)
 370
 371 #define RELOC_STD_BITS_RELATIVE_BIG     ((unsigned int) 0x02)
 372 #define RELOC_STD_BITS_RELATIVE_LITTLE  ((unsigned int) 0x40)
 373
 374 #define RELOC_STD_SIZE  (BYTES_IN_WORD + 3 + 1)         /* Bytes per relocation entry.  */
 375
 376 struct reloc_std_internal
 377 {
 378   bfd_vma r_address;            /* Address (within segment) to be relocated.  */
 379   /* The meaning of r_symbolnum depends on r_extern.  */
 380   unsigned int r_symbolnum:24;
 381   /* Nonzero means value is a pc-relative offset
 382      and it should be relocated for changes in its own address
 383      as well as for changes in the symbol or section specified.  */
 384   unsigned int r_pcrel:1;
 385   /* Length (as exponent of 2) of the field to be relocated.
 386      Thus, a value of 2 indicates 1<<2 bytes.  */
 387   unsigned int r_length:2;
 388   /* 1 => relocate with value of symbol.
 389      r_symbolnum is the index of the symbol
 390      in files the symbol table.
 391      0 => relocate with the address of a segment.
 392      r_symbolnum is N_TEXT, N_DATA, N_BSS or N_ABS
 393      (the N_EXT bit may be set also, but signifies nothing).  */
 394   unsigned int r_extern:1;
 395   /* The next three bits are for SunOS shared libraries, and seem to
 396      be undocumented.  */
 397   unsigned int r_baserel:1;     /* Linkage table relative.  */
 398   unsigned int r_jmptable:1;    /* pc-relative to jump table.  */
 399   unsigned int r_relative:1;    /* "relative relocation".  */
 400   /* unused */
 401   unsigned int r_pad:1;         /* Padding -- set to zero.  */
 402 };
 403
 404
 405 /* EXTENDED RELOCS.   */
 406
 407 struct reloc_ext_external
 408 {
 409   bfd_byte r_address[BYTES_IN_WORD];    /* Offset of data to relocate.  */
 410   bfd_byte r_index[3];                  /* Symbol table index of symbol.  */
 411   bfd_byte r_type[1];                   /* Relocation type.  */
 412   bfd_byte r_addend[BYTES_IN_WORD];     /* Datum addend.  */
 413 };
 414
 415 #ifndef RELOC_EXT_BITS_EXTERN_BIG
 416 #define RELOC_EXT_BITS_EXTERN_BIG       ((unsigned int) 0x80)
 417 #endif
 418
 419 #ifndef RELOC_EXT_BITS_EXTERN_LITTLE
 420 #define RELOC_EXT_BITS_EXTERN_LITTLE    ((unsigned int) 0x01)
 421 #endif
 422
 423 #ifndef RELOC_EXT_BITS_TYPE_BIG
 424 #define RELOC_EXT_BITS_TYPE_BIG         ((unsigned int) 0x1F)
 425 #endif
 426
 427 #ifndef RELOC_EXT_BITS_TYPE_SH_BIG
 428 #define RELOC_EXT_BITS_TYPE_SH_BIG      0
 429 #endif
 430
 431 #ifndef RELOC_EXT_BITS_TYPE_LITTLE
 432 #define RELOC_EXT_BITS_TYPE_LITTLE      ((unsigned int) 0xF8)
 433 #endif
 434
 435 #ifndef RELOC_EXT_BITS_TYPE_SH_LITTLE
 436 #define RELOC_EXT_BITS_TYPE_SH_LITTLE   3
 437 #endif
 438
 439 /* Bytes per relocation entry.  */
 440 #define RELOC_EXT_SIZE  (BYTES_IN_WORD + 3 + 1 + BYTES_IN_WORD)
 441
 442 enum reloc_type
 443 {
 444   /* Simple relocations.  */
 445   RELOC_8,                      /* data[0:7] = addend + sv              */
 446   RELOC_16,                     /* data[0:15] = addend + sv             */
 447   RELOC_32,                     /* data[0:31] = addend + sv             */
 448   /* PC-rel displacement.  */
 449   RELOC_DISP8,                  /* data[0:7] = addend - pc + sv         */
 450   RELOC_DISP16,                 /* data[0:15] = addend - pc + sv        */
 451   RELOC_DISP32,                 /* data[0:31] = addend - pc + sv        */
 452   /* Special.  */
 453   RELOC_WDISP30,                /* data[0:29] = (addend + sv - pc)>>2   */
 454   RELOC_WDISP22,                /* data[0:21] = (addend + sv - pc)>>2   */
 455   RELOC_HI22,                   /* data[0:21] = (addend + sv)>>10       */
 456   RELOC_22,                     /* data[0:21] = (addend + sv)           */
 457   RELOC_13,                     /* data[0:12] = (addend + sv)           */
 458   RELOC_LO10,                   /* data[0:9] = (addend + sv)            */
 459   RELOC_SFA_BASE,
 460   RELOC_SFA_OFF13,
 461   /* P.I.C. (base-relative).  */
 462   RELOC_BASE10,                 /* Not sure - maybe we can do this the */
 463   RELOC_BASE13,                 /* right way now */
 464   RELOC_BASE22,
 465   /* For some sort of pc-rel P.I.C. (?)  */
 466   RELOC_PC10,
 467   RELOC_PC22,
 468   /* P.I.C. jump table.  */
 469   RELOC_JMP_TBL,
 470   /* Reputedly for shared libraries somehow.  */
 471   RELOC_SEGOFF16,
 472   RELOC_GLOB_DAT,
 473   RELOC_JMP_SLOT,
 474   RELOC_RELATIVE,
 475
 476   RELOC_11,
 477   RELOC_WDISP2_14,
 478   RELOC_WDISP19,
 479   RELOC_HHI22,                  /* data[0:21] = (addend + sv) >> 42     */
 480   RELOC_HLO10,                  /* data[0:9] = (addend + sv) >> 32      */
 481
 482   /* 29K relocation types.  */
 483   RELOC_JUMPTARG,
 484   RELOC_CONST,
 485   RELOC_CONSTH,
 486
 487   /* All the new ones I can think of, for sparc v9.  */
 488   RELOC_64,                     /* data[0:63] = addend + sv             */
 489   RELOC_DISP64,                 /* data[0:63] = addend - pc + sv        */
 490   RELOC_WDISP21,                /* data[0:20] = (addend + sv - pc)>>2   */
 491   RELOC_DISP21,                 /* data[0:20] = addend - pc + sv        */
 492   RELOC_DISP14,                 /* data[0:13] = addend - pc + sv        */
 493   /* Q .
 494      What are the other ones,
 495      Since this is a clean slate, can we throw away the ones we dont
 496      understand ? Should we sort the values ? What about using a
 497      microcode format like the 68k ?  */
 498   NO_RELOC
 499   };
 500
 501
 502 struct reloc_internal
 503 {
 504   bfd_vma r_address;            /* Offset of data to relocate.  */
 505   long  r_index;                /* Symbol table index of symbol.  */
 506   enum reloc_type r_type;       /* Relocation type.  */
 507   bfd_vma r_addend;             /* Datum addend.  */
 508 };
 509
 510 /* Q.
 511    Should the length of the string table be 4 bytes or 8 bytes ?
 512
 513    Q.
 514    What about archive indexes ?  */
 515
 516 #endif                          /* __A_OUT_64_H__ */