bfd/reloc.c

   1 /* BFD support for handling relocation entries.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001
   4    Free Software Foundation, Inc.
   5    Written by Cygnus Support.
   6
   7 This file is part of BFD, the Binary File Descriptor library.
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2 of the License, or
  12 (at your option) any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with this program; if not, write to the Free Software
  21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 /*
  24 SECTION
  25         Relocations
  26
  27         BFD maintains relocations in much the same way it maintains
  28         symbols: they are left alone until required, then read in
  29         en-masse and translated into an internal form.  A common
  30         routine <<bfd_perform_relocation>> acts upon the
  31         canonical form to do the fixup.
  32
  33         Relocations are maintained on a per section basis,
  34         while symbols are maintained on a per BFD basis.
  35
  36         All that a back end has to do to fit the BFD interface is to create
  37         a <<struct reloc_cache_entry>> for each relocation
  38         in a particular section, and fill in the right bits of the structures.
  39
  40 @menu
  41 @* typedef arelent::
  42 @* howto manager::
  43 @end menu
  44
  45 */
  46
  47 /* DO compile in the reloc_code name table from libbfd.h.  */
  48 #define _BFD_MAKE_TABLE_bfd_reloc_code_real
  49
  50 #include "bfd.h"
  51 #include "sysdep.h"
  52 #include "bfdlink.h"
  53 #include "libbfd.h"
  54 /*
  55 DOCDD
  56 INODE
  57         typedef arelent, howto manager, Relocations, Relocations
  58
  59 SUBSECTION
  60         typedef arelent
  61
  62         This is the structure of a relocation entry:
  63
  64 CODE_FRAGMENT
  65 .
  66 .typedef enum bfd_reloc_status
  67 .{
  68 .  {* No errors detected *}
  69 .  bfd_reloc_ok,
  70 .
  71 .  {* The relocation was performed, but there was an overflow. *}
  72 .  bfd_reloc_overflow,
  73 .
  74 .  {* The address to relocate was not within the section supplied. *}
  75 .  bfd_reloc_outofrange,
  76 .
  77 .  {* Used by special functions *}
  78 .  bfd_reloc_continue,
  79 .
  80 .  {* Unsupported relocation size requested. *}
  81 .  bfd_reloc_notsupported,
  82 .
  83 .  {* Unused *}
  84 .  bfd_reloc_other,
  85 .
  86 .  {* The symbol to relocate against was undefined. *}
  87 .  bfd_reloc_undefined,
  88 .
  89 .  {* The relocation was performed, but may not be ok - presently
  90 .     generated only when linking i960 coff files with i960 b.out
  91 .     symbols.  If this type is returned, the error_message argument
  92 .     to bfd_perform_relocation will be set.  *}
  93 .  bfd_reloc_dangerous
  94 . }
  95 . bfd_reloc_status_type;
  96 .
  97 .
  98 .typedef struct reloc_cache_entry
  99 .{
 100 .  {* A pointer into the canonical table of pointers  *}
 101 .  struct symbol_cache_entry **sym_ptr_ptr;
 102 .
 103 .  {* offset in section *}
 104 .  bfd_size_type address;
 105 .
 106 .  {* addend for relocation value *}
 107 .  bfd_vma addend;
 108 .
 109 .  {* Pointer to how to perform the required relocation *}
 110 .  reloc_howto_type *howto;
 111 .
 112 .} arelent;
 113
 114 */
 115
 116 /*
 117 DESCRIPTION
 118
 119         Here is a description of each of the fields within an <<arelent>>:
 120
 121         o <<sym_ptr_ptr>>
 122
 123         The symbol table pointer points to a pointer to the symbol
 124         associated with the relocation request.  It is
 125         the pointer into the table returned by the back end's
 126         <<get_symtab>> action. @xref{Symbols}. The symbol is referenced
 127         through a pointer to a pointer so that tools like the linker
 128         can fix up all the symbols of the same name by modifying only
 129         one pointer. The relocation routine looks in the symbol and
 130         uses the base of the section the symbol is attached to and the
 131         value of the symbol as the initial relocation offset. If the
 132         symbol pointer is zero, then the section provided is looked up.
 133
 134         o <<address>>
 135
 136         The <<address>> field gives the offset in bytes from the base of
 137         the section data which owns the relocation record to the first
 138         byte of relocatable information. The actual data relocated
 139         will be relative to this point; for example, a relocation
 140         type which modifies the bottom two bytes of a four byte word
 141         would not touch the first byte pointed to in a big endian
 142         world.
 143
 144         o <<addend>>
 145
 146         The <<addend>> is a value provided by the back end to be added (!)
 147         to the relocation offset. Its interpretation is dependent upon
 148         the howto. For example, on the 68k the code:
 149
 150 |        char foo[];
 151 |        main()
 152 |                {
 153 |                return foo[0x12345678];
 154 |                }
 155
 156         Could be compiled into:
 157
 158 |        linkw fp,#-4
 159 |        moveb @@#12345678,d0
 160 |        extbl d0
 161 |        unlk fp
 162 |        rts
 163
 164         This could create a reloc pointing to <<foo>>, but leave the
 165         offset in the data, something like:
 166
 167 |RELOCATION RECORDS FOR [.text]:
 168 |offset   type      value
 169 |00000006 32        _foo
 170 |
 171 |00000000 4e56 fffc          ; linkw fp,#-4
 172 |00000004 1039 1234 5678     ; moveb @@#12345678,d0
 173 |0000000a 49c0               ; extbl d0
 174 |0000000c 4e5e               ; unlk fp
 175 |0000000e 4e75               ; rts
 176
 177         Using coff and an 88k, some instructions don't have enough
 178         space in them to represent the full address range, and
 179         pointers have to be loaded in two parts. So you'd get something like:
 180
 181 |        or.u     r13,r0,hi16(_foo+0x12345678)
 182 |        ld.b     r2,r13,lo16(_foo+0x12345678)
 183 |        jmp      r1
 184
 185         This should create two relocs, both pointing to <<_foo>>, and with
 186         0x12340000 in their addend field. The data would consist of:
 187
 188 |RELOCATION RECORDS FOR [.text]:
 189 |offset   type      value
 190 |00000002 HVRT16    _foo+0x12340000
 191 |00000006 LVRT16    _foo+0x12340000
 192 |
 193 |00000000 5da05678           ; or.u r13,r0,0x5678
 194 |00000004 1c4d5678           ; ld.b r2,r13,0x5678
 195 |00000008 f400c001           ; jmp r1
 196
 197         The relocation routine digs out the value from the data, adds
 198         it to the addend to get the original offset, and then adds the
 199         value of <<_foo>>. Note that all 32 bits have to be kept around
 200         somewhere, to cope with carry from bit 15 to bit 16.
 201
 202         One further example is the sparc and the a.out format. The
 203         sparc has a similar problem to the 88k, in that some
 204         instructions don't have room for an entire offset, but on the
 205         sparc the parts are created in odd sized lumps. The designers of
 206         the a.out format chose to not use the data within the section
 207         for storing part of the offset; all the offset is kept within
 208         the reloc. Anything in the data should be ignored.
 209
 210 |        save %sp,-112,%sp
 211 |        sethi %hi(_foo+0x12345678),%g2
 212 |        ldsb [%g2+%lo(_foo+0x12345678)],%i0
 213 |        ret
 214 |        restore
 215
 216         Both relocs contain a pointer to <<foo>>, and the offsets
 217         contain junk.
 218
 219 |RELOCATION RECORDS FOR [.text]:
 220 |offset   type      value
 221 |00000004 HI22      _foo+0x12345678
 222 |00000008 LO10      _foo+0x12345678
 223 |
 224 |00000000 9de3bf90     ; save %sp,-112,%sp
 225 |00000004 05000000     ; sethi %hi(_foo+0),%g2
 226 |00000008 f048a000     ; ldsb [%g2+%lo(_foo+0)],%i0
 227 |0000000c 81c7e008     ; ret
 228 |00000010 81e80000     ; restore
 229
 230         o <<howto>>
 231
 232         The <<howto>> field can be imagined as a
 233         relocation instruction. It is a pointer to a structure which
 234         contains information on what to do with all of the other
 235         information in the reloc record and data section. A back end
 236         would normally have a relocation instruction set and turn
 237         relocations into pointers to the correct structure on input -
 238         but it would be possible to create each howto field on demand.
 239
 240 */
 241
 242 /*
 243 SUBSUBSECTION
 244         <<enum complain_overflow>>
 245
 246         Indicates what sort of overflow checking should be done when
 247         performing a relocation.
 248
 249 CODE_FRAGMENT
 250 .
 251 .enum complain_overflow
 252 .{
 253 .  {* Do not complain on overflow. *}
 254 .  complain_overflow_dont,
 255 .
 256 .  {* Complain if the bitfield overflows, whether it is considered
 257 .     as signed or unsigned. *}
 258 .  complain_overflow_bitfield,
 259 .
 260 .  {* Complain if the value overflows when considered as signed
 261 .     number. *}
 262 .  complain_overflow_signed,
 263 .
 264 .  {* Complain if the value overflows when considered as an
 265 .     unsigned number. *}
 266 .  complain_overflow_unsigned
 267 .};
 268
 269 */
 270
 271 /*
 272 SUBSUBSECTION
 273         <<reloc_howto_type>>
 274
 275         The <<reloc_howto_type>> is a structure which contains all the
 276         information that libbfd needs to know to tie up a back end's data.
 277
 278 CODE_FRAGMENT
 279 .struct symbol_cache_entry;             {* Forward declaration *}
 280 .
 281 .struct reloc_howto_struct
 282 .{
 283 .  {*  The type field has mainly a documentary use - the back end can
 284 .      do what it wants with it, though normally the back end's
 285 .      external idea of what a reloc number is stored
 286 .      in this field.  For example, a PC relative word relocation
 287 .      in a coff environment has the type 023 - because that's
 288 .      what the outside world calls a R_PCRWORD reloc.  *}
 289 .  unsigned int type;
 290 .
 291 .  {*  The value the final relocation is shifted right by.  This drops
 292 .      unwanted data from the relocation.  *}
 293 .  unsigned int rightshift;
 294 .
 295 .  {*  The size of the item to be relocated.  This is *not* a
 296 .      power-of-two measure.  To get the number of bytes operated
 297 .      on by a type of relocation, use bfd_get_reloc_size.  *}
 298 .  int size;
 299 .
 300 .  {*  The number of bits in the item to be relocated.  This is used
 301 .      when doing overflow checking.  *}
 302 .  unsigned int bitsize;
 303 .
 304 .  {*  Notes that the relocation is relative to the location in the
 305 .      data section of the addend.  The relocation function will
 306 .      subtract from the relocation value the address of the location
 307 .      being relocated.  *}
 308 .  boolean pc_relative;
 309 .
 310 .  {*  The bit position of the reloc value in the destination.
 311 .      The relocated value is left shifted by this amount.  *}
 312 .  unsigned int bitpos;
 313 .
 314 .  {* What type of overflow error should be checked for when
 315 .     relocating.  *}
 316 .  enum complain_overflow complain_on_overflow;
 317 .
 318 .  {* If this field is non null, then the supplied function is
 319 .     called rather than the normal function.  This allows really
 320 .     strange relocation methods to be accomodated (e.g., i960 callj
 321 .     instructions).  *}
 322 .  bfd_reloc_status_type (*special_function)
 323 .    PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR, asection *,
 324 .             bfd *, char **));
 325 .
 326 .  {* The textual name of the relocation type.  *}
 327 .  char *name;
 328 .
 329 .  {* Some formats record a relocation addend in the section contents
 330 .     rather than with the relocation.  For ELF formats this is the
 331 .     distinction between USE_REL and USE_RELA (though the code checks
 332 .     for USE_REL == 1/0).  The value of this field is TRUE if the
 333 .     addend is recorded with the section contents; when performing a
 334 .     partial link (ld -r) the section contents (the data) will be
 335 .     modified.  The value of this field is FALSE if addends are
 336 .     recorded with the relocation (in arelent.addend); when performing
 337 .     a partial link the relocation will be modified.
 338 .     All relocations for all ELF USE_RELA targets should set this field
 339 .     to FALSE (values of TRUE should be looked on with suspicion).
 340 .     However, the converse is not true: not all relocations of all ELF
 341 .     USE_REL targets set this field to TRUE.  Why this is so is peculiar
 342 .     to each particular target.  For relocs that aren't used in partial
 343 .     links (e.g. GOT stuff) it doesn't matter what this is set to.  *}
 344 .  boolean partial_inplace;
 345 .
 346 .  {* The src_mask selects which parts of the read in data
 347 .     are to be used in the relocation sum.  E.g., if this was an 8 bit
 348 .     byte of data which we read and relocated, this would be
 349 .     0x000000ff.  When we have relocs which have an addend, such as
 350 .     sun4 extended relocs, the value in the offset part of a
 351 .     relocating field is garbage so we never use it.  In this case
 352 .     the mask would be 0x00000000.  *}
 353 .  bfd_vma src_mask;
 354 .
 355 .  {* The dst_mask selects which parts of the instruction are replaced
 356 .     into the instruction.  In most cases src_mask == dst_mask,
 357 .     except in the above special case, where dst_mask would be
 358 .     0x000000ff, and src_mask would be 0x00000000.  *}
 359 .  bfd_vma dst_mask;
 360 .
 361 .  {* When some formats create PC relative instructions, they leave
 362 .     the value of the pc of the place being relocated in the offset
 363 .     slot of the instruction, so that a PC relative relocation can
 364 .     be made just by adding in an ordinary offset (e.g., sun3 a.out).
 365 .     Some formats leave the displacement part of an instruction
 366 .     empty (e.g., m88k bcs); this flag signals the fact.  *}
 367 .  boolean pcrel_offset;
 368 .};
 369
 370 */
 371
 372 /*
 373 FUNCTION
 374         The HOWTO Macro
 375
 376 DESCRIPTION
 377         The HOWTO define is horrible and will go away.
 378
 379 .#define HOWTO(C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
 380 .  { (unsigned) C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC }
 381
 382 DESCRIPTION
 383         And will be replaced with the totally magic way. But for the
 384         moment, we are compatible, so do it this way.
 385
 386 .#define NEWHOWTO(FUNCTION, NAME, SIZE, REL, IN) \
 387 .  HOWTO (0, 0, SIZE, 0, REL, 0, complain_overflow_dont, FUNCTION, \
 388 .         NAME, false, 0, 0, IN)
 389 .
 390
 391 DESCRIPTION
 392         This is used to fill in an empty howto entry in an array.
 393
 394 .#define EMPTY_HOWTO(C) \
 395 .  HOWTO ((C), 0, 0, 0, false, 0, complain_overflow_dont, NULL, \
 396 .         NULL, false, 0, 0, false)
 397 .
 398
 399 DESCRIPTION
 400         Helper routine to turn a symbol into a relocation value.
 401
 402 .#define HOWTO_PREPARE(relocation, symbol)               \
 403 .  {                                                     \
 404 .    if (symbol != (asymbol *) NULL)                     \
 405 .      {                                                 \
 406 .        if (bfd_is_com_section (symbol->section))       \
 407 .          {                                             \
 408 .            relocation = 0;                             \
 409 .          }                                             \
 410 .        else                                            \
 411 .          {                                             \
 412 .            relocation = symbol->value;                 \
 413 .          }                                             \
 414 .      }                                                 \
 415 .  }
 416
 417 */
 418
 419 /*
 420 FUNCTION
 421         bfd_get_reloc_size
 422
 423 SYNOPSIS
 424         unsigned int bfd_get_reloc_size (reloc_howto_type *);
 425
 426 DESCRIPTION
 427         For a reloc_howto_type that operates on a fixed number of bytes,
 428         this returns the number of bytes operated on.
 429  */
 430
 431 unsigned int
 432 bfd_get_reloc_size (howto)
 433      reloc_howto_type *howto;
 434 {
 435   switch (howto->size)
 436     {
 437     case 0: return 1;
 438     case 1: return 2;
 439     case 2: return 4;
 440     case 3: return 0;
 441     case 4: return 8;
 442     case 8: return 16;
 443     case -2: return 4;
 444     default: abort ();
 445     }
 446 }
 447
 448 /*
 449 TYPEDEF
 450         arelent_chain
 451
 452 DESCRIPTION
 453
 454         How relocs are tied together in an <<asection>>:
 455
 456 .typedef struct relent_chain
 457 .{
 458 .  arelent relent;
 459 .  struct relent_chain *next;
 460 .} arelent_chain;
 461
 462 */
 463
 464 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 465 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 466
 467 /*
 468 FUNCTION
 469         bfd_check_overflow
 470
 471 SYNOPSIS
 472         bfd_reloc_status_type
 473                 bfd_check_overflow
 474                         (enum complain_overflow how,
 475                          unsigned int bitsize,
 476                          unsigned int rightshift,
 477                          unsigned int addrsize,
 478                          bfd_vma relocation);
 479
 480 DESCRIPTION
 481         Perform overflow checking on @var{relocation} which has
 482         @var{bitsize} significant bits and will be shifted right by
 483         @var{rightshift} bits, on a machine with addresses containing
 484         @var{addrsize} significant bits.  The result is either of
 485         @code{bfd_reloc_ok} or @code{bfd_reloc_overflow}.
 486
 487 */
 488
 489 bfd_reloc_status_type
 490 bfd_check_overflow (how, bitsize, rightshift, addrsize, relocation)
 491      enum complain_overflow how;
 492      unsigned int bitsize;
 493      unsigned int rightshift;
 494      unsigned int addrsize;
 495      bfd_vma relocation;
 496 {
 497   bfd_vma fieldmask, addrmask, signmask, ss, a;
 498   bfd_reloc_status_type flag = bfd_reloc_ok;
 499
 500   a = relocation;
 501
 502   /* Note: BITSIZE should always be <= ADDRSIZE, but in case it's not,
 503      we'll be permissive: extra bits in the field mask will
 504      automatically extend the address mask for purposes of the
 505      overflow check.  */
 506   fieldmask = N_ONES (bitsize);
 507   addrmask = N_ONES (addrsize) | fieldmask;
 508
 509   switch (how)
 510     {
 511     case complain_overflow_dont:
 512       break;
 513
 514     case complain_overflow_signed:
 515       /* If any sign bits are set, all sign bits must be set.  That
 516          is, A must be a valid negative address after shifting.  */
 517       a = (a & addrmask) >> rightshift;
 518       signmask = ~ (fieldmask >> 1);
 519       ss = a & signmask;
 520       if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
 521         flag = bfd_reloc_overflow;
 522       break;
 523
 524     case complain_overflow_unsigned:
 525       /* We have an overflow if the address does not fit in the field.  */
 526       a = (a & addrmask) >> rightshift;
 527       if ((a & ~ fieldmask) != 0)
 528         flag = bfd_reloc_overflow;
 529       break;
 530
 531     case complain_overflow_bitfield:
 532       /* Bitfields are sometimes signed, sometimes unsigned.  We
 533          explicitly allow an address wrap too, which means a bitfield
 534          of n bits is allowed to store -2**n to 2**n-1.  Thus overflow
 535          if the value has some, but not all, bits set outside the
 536          field.  */
 537       a >>= rightshift;
 538       ss = a & ~ fieldmask;
 539       if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & ~ fieldmask))
 540         flag = bfd_reloc_overflow;
 541       break;
 542
 543     default:
 544       abort ();
 545     }
 546
 547   return flag;
 548 }
 549
 550 /*
 551 FUNCTION
 552         bfd_perform_relocation
 553
 554 SYNOPSIS
 555         bfd_reloc_status_type
 556                 bfd_perform_relocation
 557                         (bfd *abfd,
 558                          arelent *reloc_entry,
 559                          PTR data,
 560                          asection *input_section,
 561                          bfd *output_bfd,
 562                          char **error_message);
 563
 564 DESCRIPTION
 565         If @var{output_bfd} is supplied to this function, the
 566         generated image will be relocatable; the relocations are
 567         copied to the output file after they have been changed to
 568         reflect the new state of the world. There are two ways of
 569         reflecting the results of partial linkage in an output file:
 570         by modifying the output data in place, and by modifying the
 571         relocation record.  Some native formats (e.g., basic a.out and
 572         basic coff) have no way of specifying an addend in the
 573         relocation type, so the addend has to go in the output data.
 574         This is no big deal since in these formats the output data
 575         slot will always be big enough for the addend. Complex reloc
 576         types with addends were invented to solve just this problem.
 577         The @var{error_message} argument is set to an error message if
 578         this return @code{bfd_reloc_dangerous}.
 579
 580 */
 581
 582 bfd_reloc_status_type
 583 bfd_perform_relocation (abfd, reloc_entry, data, input_section, output_bfd,
 584                         error_message)
 585      bfd *abfd;
 586      arelent *reloc_entry;
 587      PTR data;
 588      asection *input_section;
 589      bfd *output_bfd;
 590      char **error_message;
 591 {
 592   bfd_vma relocation;
 593   bfd_reloc_status_type flag = bfd_reloc_ok;
 594   bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
 595   bfd_vma output_base = 0;
 596   reloc_howto_type *howto = reloc_entry->howto;
 597   asection *reloc_target_output_section;
 598   asymbol *symbol;
 599
 600   symbol = *(reloc_entry->sym_ptr_ptr);
 601   if (bfd_is_abs_section (symbol->section)
 602       && output_bfd != (bfd *) NULL)
 603     {
 604       reloc_entry->address += input_section->output_offset;
 605       return bfd_reloc_ok;
 606     }
 607
 608   /* If we are not producing relocateable output, return an error if
 609      the symbol is not defined.  An undefined weak symbol is
 610      considered to have a value of zero (SVR4 ABI, p. 4-27).  */
 611   if (bfd_is_und_section (symbol->section)
 612       && (symbol->flags & BSF_WEAK) == 0
 613       && output_bfd == (bfd *) NULL)
 614     flag = bfd_reloc_undefined;
 615
 616   /* If there is a function supplied to handle this relocation type,
 617      call it.  It'll return `bfd_reloc_continue' if further processing
 618      can be done.  */
 619   if (howto->special_function)
 620     {
 621       bfd_reloc_status_type cont;
 622       cont = howto->special_function (abfd, reloc_entry, symbol, data,
 623                                       input_section, output_bfd,
 624                                       error_message);
 625       if (cont != bfd_reloc_continue)
 626         return cont;
 627     }
 628
 629   /* Is the address of the relocation really within the section?  */
 630   if (reloc_entry->address > input_section->_cooked_size /
 631       bfd_octets_per_byte (abfd))
 632     return bfd_reloc_outofrange;
 633
 634   /* Work out which section the relocation is targetted at and the
 635      initial relocation command value.  */
 636
 637   /* Get symbol value.  (Common symbols are special.)  */
 638   if (bfd_is_com_section (symbol->section))
 639     relocation = 0;
 640   else
 641     relocation = symbol->value;
 642
 643   reloc_target_output_section = symbol->section->output_section;
 644
 645   /* Convert input-section-relative symbol value to absolute.  */
 646   if (output_bfd && howto->partial_inplace == false)
 647     output_base = 0;
 648   else
 649     output_base = reloc_target_output_section->vma;
 650
 651   relocation += output_base + symbol->section->output_offset;
 652
 653   /* Add in supplied addend.  */
 654   relocation += reloc_entry->addend;
 655
 656   /* Here the variable relocation holds the final address of the
 657      symbol we are relocating against, plus any addend.  */
 658
 659   if (howto->pc_relative == true)
 660     {
 661       /* This is a PC relative relocation.  We want to set RELOCATION
 662          to the distance between the address of the symbol and the
 663          location.  RELOCATION is already the address of the symbol.
 664
 665          We start by subtracting the address of the section containing
 666          the location.
 667
 668          If pcrel_offset is set, we must further subtract the position
 669          of the location within the section.  Some targets arrange for
 670          the addend to be the negative of the position of the location
 671          within the section; for example, i386-aout does this.  For
 672          i386-aout, pcrel_offset is false.  Some other targets do not
 673          include the position of the location; for example, m88kbcs,
 674          or ELF.  For those targets, pcrel_offset is true.
 675
 676          If we are producing relocateable output, then we must ensure
 677          that this reloc will be correctly computed when the final
 678          relocation is done.  If pcrel_offset is false we want to wind
 679          up with the negative of the location within the section,
 680          which means we must adjust the existing addend by the change
 681          in the location within the section.  If pcrel_offset is true
 682          we do not want to adjust the existing addend at all.
 683
 684          FIXME: This seems logical to me, but for the case of
 685          producing relocateable output it is not what the code
 686          actually does.  I don't want to change it, because it seems
 687          far too likely that something will break.  */
 688
 689       relocation -=
 690         input_section->output_section->vma + input_section->output_offset;
 691
 692       if (howto->pcrel_offset == true)
 693         relocation -= reloc_entry->address;
 694     }
 695
 696   if (output_bfd != (bfd *) NULL)
 697     {
 698       if (howto->partial_inplace == false)
 699         {
 700           /* This is a partial relocation, and we want to apply the relocation
 701              to the reloc entry rather than the raw data. Modify the reloc
 702              inplace to reflect what we now know.  */
 703           reloc_entry->addend = relocation;
 704           reloc_entry->address += input_section->output_offset;
 705           return flag;
 706         }
 707       else
 708         {
 709           /* This is a partial relocation, but inplace, so modify the
 710              reloc record a bit.
 711
 712              If we've relocated with a symbol with a section, change
 713              into a ref to the section belonging to the symbol.  */
 714
 715           reloc_entry->address += input_section->output_offset;
 716
 717           /* WTF?? */
 718           if (abfd->xvec->flavour == bfd_target_coff_flavour
 719               && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
 720               && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
 721             {
 722 #if 1
 723               /* For m68k-coff, the addend was being subtracted twice during
 724                  relocation with -r.  Removing the line below this comment
 725                  fixes that problem; see PR 2953.
 726
 727 However, Ian wrote the following, regarding removing the line below,
 728 which explains why it is still enabled:  --djm
 729
 730 If you put a patch like that into BFD you need to check all the COFF
 731 linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
 732 SCO); see coff_i386_reloc in coff-i386.c where I worked around the
 733 problem in a different way.  There may very well be a reason that the
 734 code works as it does.
 735
 736 Hmmm.  The first obvious point is that bfd_perform_relocation should
 737 not have any tests that depend upon the flavour.  It's seem like
 738 entirely the wrong place for such a thing.  The second obvious point
 739 is that the current code ignores the reloc addend when producing
 740 relocateable output for COFF.  That's peculiar.  In fact, I really
 741 have no idea what the point of the line you want to remove is.
 742
 743 A typical COFF reloc subtracts the old value of the symbol and adds in
 744 the new value to the location in the object file (if it's a pc
 745 relative reloc it adds the difference between the symbol value and the
 746 location).  When relocating we need to preserve that property.
 747
 748 BFD handles this by setting the addend to the negative of the old
 749 value of the symbol.  Unfortunately it handles common symbols in a
 750 non-standard way (it doesn't subtract the old value) but that's a
 751 different story (we can't change it without losing backward
 752 compatibility with old object files) (coff-i386 does subtract the old
 753 value, to be compatible with existing coff-i386 targets, like SCO).
 754
 755 So everything works fine when not producing relocateable output.  When
 756 we are producing relocateable output, logically we should do exactly
 757 what we do when not producing relocateable output.  Therefore, your
 758 patch is correct.  In fact, it should probably always just set
 759 reloc_entry->addend to 0 for all cases, since it is, in fact, going to
 760 add the value into the object file.  This won't hurt the COFF code,
 761 which doesn't use the addend; I'm not sure what it will do to other
 762 formats (the thing to check for would be whether any formats both use
 763 the addend and set partial_inplace).
 764
 765 When I wanted to make coff-i386 produce relocateable output, I ran
 766 into the problem that you are running into: I wanted to remove that
 767 line.  Rather than risk it, I made the coff-i386 relocs use a special
 768 function; it's coff_i386_reloc in coff-i386.c.  The function
 769 specifically adds the addend field into the object file, knowing that
 770 bfd_perform_relocation is not going to.  If you remove that line, then
 771 coff-i386.c will wind up adding the addend field in twice.  It's
 772 trivial to fix; it just needs to be done.
 773
 774 The problem with removing the line is just that it may break some
 775 working code.  With BFD it's hard to be sure of anything.  The right
 776 way to deal with this is simply to build and test at least all the
 777 supported COFF targets.  It should be straightforward if time and disk
 778 space consuming.  For each target:
 779     1) build the linker
 780     2) generate some executable, and link it using -r (I would
 781        probably use paranoia.o and link against newlib/libc.a, which
 782        for all the supported targets would be available in
 783        /usr/cygnus/progressive/H-host/target/lib/libc.a).
 784     3) make the change to reloc.c
 785     4) rebuild the linker
 786     5) repeat step 2
 787     6) if the resulting object files are the same, you have at least
 788        made it no worse
 789     7) if they are different you have to figure out which version is
 790        right
 791 */
 792               relocation -= reloc_entry->addend;
 793 #endif
 794               reloc_entry->addend = 0;
 795             }
 796           else
 797             {
 798               reloc_entry->addend = relocation;
 799             }
 800         }
 801     }
 802   else
 803     {
 804       reloc_entry->addend = 0;
 805     }
 806
 807   /* FIXME: This overflow checking is incomplete, because the value
 808      might have overflowed before we get here.  For a correct check we
 809      need to compute the value in a size larger than bitsize, but we
 810      can't reasonably do that for a reloc the same size as a host
 811      machine word.
 812      FIXME: We should also do overflow checking on the result after
 813      adding in the value contained in the object file.  */
 814   if (howto->complain_on_overflow != complain_overflow_dont
 815       && flag == bfd_reloc_ok)
 816     flag = bfd_check_overflow (howto->complain_on_overflow,
 817                                howto->bitsize,
 818                                howto->rightshift,
 819                                bfd_arch_bits_per_address (abfd),
 820                                relocation);
 821
 822   /*
 823     Either we are relocating all the way, or we don't want to apply
 824     the relocation to the reloc entry (probably because there isn't
 825     any room in the output format to describe addends to relocs)
 826     */
 827
 828   /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
 829      (OSF version 1.3, compiler version 3.11).  It miscompiles the
 830      following program:
 831
 832      struct str
 833      {
 834        unsigned int i0;
 835      } s = { 0 };
 836
 837      int
 838      main ()
 839      {
 840        unsigned long x;
 841
 842        x = 0x100000000;
 843        x <<= (unsigned long) s.i0;
 844        if (x == 0)
 845          printf ("failed\n");
 846        else
 847          printf ("succeeded (%lx)\n", x);
 848      }
 849      */
 850
 851   relocation >>= (bfd_vma) howto->rightshift;
 852
 853   /* Shift everything up to where it's going to be used */
 854
 855   relocation <<= (bfd_vma) howto->bitpos;
 856
 857   /* Wait for the day when all have the mask in them */
 858
 859   /* What we do:
 860      i instruction to be left alone
 861      o offset within instruction
 862      r relocation offset to apply
 863      S src mask
 864      D dst mask
 865      N ~dst mask
 866      A part 1
 867      B part 2
 868      R result
 869
 870      Do this:
 871      ((  i i i i i o o o o o  from bfd_get<size>
 872      and           S S S S S) to get the size offset we want
 873      +   r r r r r r r r r r) to get the final value to place
 874      and           D D D D D  to chop to right size
 875      -----------------------
 876      =             A A A A A
 877      And this:
 878      (   i i i i i o o o o o  from bfd_get<size>
 879      and N N N N N          ) get instruction
 880      -----------------------
 881      =   B B B B B
 882
 883      And then:
 884      (   B B B B B
 885      or            A A A A A)
 886      -----------------------
 887      =   R R R R R R R R R R  put into bfd_put<size>
 888      */
 889
 890 #define DOIT(x) \
 891   x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))
 892
 893   switch (howto->size)
 894     {
 895     case 0:
 896       {
 897         char x = bfd_get_8 (abfd, (char *) data + octets);
 898         DOIT (x);
 899         bfd_put_8 (abfd, x, (unsigned char *) data + octets);
 900       }
 901       break;
 902
 903     case 1:
 904       {
 905         short x = bfd_get_16 (abfd, (bfd_byte *) data + octets);
 906         DOIT (x);
 907         bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + octets);
 908       }
 909       break;
 910     case 2:
 911       {
 912         long x = bfd_get_32 (abfd, (bfd_byte *) data + octets);
 913         DOIT (x);
 914         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 915       }
 916       break;
 917     case -2:
 918       {
 919         long x = bfd_get_32 (abfd, (bfd_byte *) data + octets);
 920         relocation = -relocation;
 921         DOIT (x);
 922         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 923       }
 924       break;
 925
 926     case -1:
 927       {
 928         long x = bfd_get_16 (abfd, (bfd_byte *) data + octets);
 929         relocation = -relocation;
 930         DOIT (x);
 931         bfd_put_16 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 932       }
 933       break;
 934
 935     case 3:
 936       /* Do nothing */
 937       break;
 938
 939     case 4:
 940 #ifdef BFD64
 941       {
 942         bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data + octets);
 943         DOIT (x);
 944         bfd_put_64 (abfd, x, (bfd_byte *) data + octets);
 945       }
 946 #else
 947       abort ();
 948 #endif
 949       break;
 950     default:
 951       return bfd_reloc_other;
 952     }
 953
 954   return flag;
 955 }
 956
 957 /*
 958 FUNCTION
 959         bfd_install_relocation
 960
 961 SYNOPSIS
 962         bfd_reloc_status_type
 963                 bfd_install_relocation
 964                         (bfd *abfd,
 965                          arelent *reloc_entry,
 966                          PTR data, bfd_vma data_start,
 967                          asection *input_section,
 968                          char **error_message);
 969
 970 DESCRIPTION
 971         This looks remarkably like <<bfd_perform_relocation>>, except it
 972         does not expect that the section contents have been filled in.
 973         I.e., it's suitable for use when creating, rather than applying
 974         a relocation.
 975
 976         For now, this function should be considered reserved for the
 977         assembler.
 978
 979 */
 980
 981 bfd_reloc_status_type
 982 bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset,
 983                         input_section, error_message)
 984      bfd *abfd;
 985      arelent *reloc_entry;
 986      PTR data_start;
 987      bfd_vma data_start_offset;
 988      asection *input_section;
 989      char **error_message;
 990 {
 991   bfd_vma relocation;
 992   bfd_reloc_status_type flag = bfd_reloc_ok;
 993   bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
 994   bfd_vma output_base = 0;
 995   reloc_howto_type *howto = reloc_entry->howto;
 996   asection *reloc_target_output_section;
 997   asymbol *symbol;
 998   bfd_byte *data;
 999
1000   symbol = *(reloc_entry->sym_ptr_ptr);
1001   if (bfd_is_abs_section (symbol->section))
1002     {
1003       reloc_entry->address += input_section->output_offset;
1004       return bfd_reloc_ok;
1005     }
1006
1007   /* If there is a function supplied to handle this relocation type,
1008      call it.  It'll return `bfd_reloc_continue' if further processing
1009      can be done.  */
1010   if (howto->special_function)
1011     {
1012       bfd_reloc_status_type cont;
1013
1014       /* XXX - The special_function calls haven't been fixed up to deal
1015          with creating new relocations and section contents.  */
1016       cont = howto->special_function (abfd, reloc_entry, symbol,
1017                                       /* XXX - Non-portable! */
1018                                       ((bfd_byte *) data_start
1019                                        - data_start_offset),
1020                                       input_section, abfd, error_message);
1021       if (cont != bfd_reloc_continue)
1022         return cont;
1023     }
1024
1025   /* Is the address of the relocation really within the section?  */
1026   if (reloc_entry->address > input_section->_cooked_size)
1027     return bfd_reloc_outofrange;
1028
1029   /* Work out which section the relocation is targetted at and the
1030      initial relocation command value.  */
1031
1032   /* Get symbol value.  (Common symbols are special.)  */
1033   if (bfd_is_com_section (symbol->section))
1034     relocation = 0;
1035   else
1036     relocation = symbol->value;
1037
1038   reloc_target_output_section = symbol->section->output_section;
1039
1040   /* Convert input-section-relative symbol value to absolute.  */
1041   if (howto->partial_inplace == false)
1042     output_base = 0;
1043   else
1044     output_base = reloc_target_output_section->vma;
1045
1046   relocation += output_base + symbol->section->output_offset;
1047
1048   /* Add in supplied addend.  */
1049   relocation += reloc_entry->addend;
1050
1051   /* Here the variable relocation holds the final address of the
1052      symbol we are relocating against, plus any addend.  */
1053
1054   if (howto->pc_relative == true)
1055     {
1056       /* This is a PC relative relocation.  We want to set RELOCATION
1057          to the distance between the address of the symbol and the
1058          location.  RELOCATION is already the address of the symbol.
1059
1060          We start by subtracting the address of the section containing
1061          the location.
1062
1063          If pcrel_offset is set, we must further subtract the position
1064          of the location within the section.  Some targets arrange for
1065          the addend to be the negative of the position of the location
1066          within the section; for example, i386-aout does this.  For
1067          i386-aout, pcrel_offset is false.  Some other targets do not
1068          include the position of the location; for example, m88kbcs,
1069          or ELF.  For those targets, pcrel_offset is true.
1070
1071          If we are producing relocateable output, then we must ensure
1072          that this reloc will be correctly computed when the final
1073          relocation is done.  If pcrel_offset is false we want to wind
1074          up with the negative of the location within the section,
1075          which means we must adjust the existing addend by the change
1076          in the location within the section.  If pcrel_offset is true
1077          we do not want to adjust the existing addend at all.
1078
1079          FIXME: This seems logical to me, but for the case of
1080          producing relocateable output it is not what the code
1081          actually does.  I don't want to change it, because it seems
1082          far too likely that something will break.  */
1083
1084       relocation -=
1085         input_section->output_section->vma + input_section->output_offset;
1086
1087       if (howto->pcrel_offset == true && howto->partial_inplace == true)
1088         relocation -= reloc_entry->address;
1089     }
1090
1091   if (howto->partial_inplace == false)
1092     {
1093       /* This is a partial relocation, and we want to apply the relocation
1094          to the reloc entry rather than the raw data. Modify the reloc
1095          inplace to reflect what we now know.  */
1096       reloc_entry->addend = relocation;
1097       reloc_entry->address += input_section->output_offset;
1098       return flag;
1099     }
1100   else
1101     {
1102       /* This is a partial relocation, but inplace, so modify the
1103          reloc record a bit.
1104
1105          If we've relocated with a symbol with a section, change
1106          into a ref to the section belonging to the symbol.  */
1107
1108       reloc_entry->address += input_section->output_offset;
1109
1110       /* WTF?? */
1111       if (abfd->xvec->flavour == bfd_target_coff_flavour
1112           && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
1113           && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
1114         {
1115 #if 1
1116 /* For m68k-coff, the addend was being subtracted twice during
1117    relocation with -r.  Removing the line below this comment
1118    fixes that problem; see PR 2953.
1119
1120 However, Ian wrote the following, regarding removing the line below,
1121 which explains why it is still enabled:  --djm
1122
1123 If you put a patch like that into BFD you need to check all the COFF
1124 linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
1125 SCO); see coff_i386_reloc in coff-i386.c where I worked around the
1126 problem in a different way.  There may very well be a reason that the
1127 code works as it does.
1128
1129 Hmmm.  The first obvious point is that bfd_install_relocation should
1130 not have any tests that depend upon the flavour.  It's seem like
1131 entirely the wrong place for such a thing.  The second obvious point
1132 is that the current code ignores the reloc addend when producing
1133 relocateable output for COFF.  That's peculiar.  In fact, I really
1134 have no idea what the point of the line you want to remove is.
1135
1136 A typical COFF reloc subtracts the old value of the symbol and adds in
1137 the new value to the location in the object file (if it's a pc
1138 relative reloc it adds the difference between the symbol value and the
1139 location).  When relocating we need to preserve that property.
1140
1141 BFD handles this by setting the addend to the negative of the old
1142 value of the symbol.  Unfortunately it handles common symbols in a
1143 non-standard way (it doesn't subtract the old value) but that's a
1144 different story (we can't change it without losing backward
1145 compatibility with old object files) (coff-i386 does subtract the old
1146 value, to be compatible with existing coff-i386 targets, like SCO).
1147
1148 So everything works fine when not producing relocateable output.  When
1149 we are producing relocateable output, logically we should do exactly
1150 what we do when not producing relocateable output.  Therefore, your
1151 patch is correct.  In fact, it should probably always just set
1152 reloc_entry->addend to 0 for all cases, since it is, in fact, going to
1153 add the value into the object file.  This won't hurt the COFF code,
1154 which doesn't use the addend; I'm not sure what it will do to other
1155 formats (the thing to check for would be whether any formats both use
1156 the addend and set partial_inplace).
1157
1158 When I wanted to make coff-i386 produce relocateable output, I ran
1159 into the problem that you are running into: I wanted to remove that
1160 line.  Rather than risk it, I made the coff-i386 relocs use a special
1161 function; it's coff_i386_reloc in coff-i386.c.  The function
1162 specifically adds the addend field into the object file, knowing that
1163 bfd_install_relocation is not going to.  If you remove that line, then
1164 coff-i386.c will wind up adding the addend field in twice.  It's
1165 trivial to fix; it just needs to be done.
1166
1167 The problem with removing the line is just that it may break some
1168 working code.  With BFD it's hard to be sure of anything.  The right
1169 way to deal with this is simply to build and test at least all the
1170 supported COFF targets.  It should be straightforward if time and disk
1171 space consuming.  For each target:
1172     1) build the linker
1173     2) generate some executable, and link it using -r (I would
1174        probably use paranoia.o and link against newlib/libc.a, which
1175        for all the supported targets would be available in
1176        /usr/cygnus/progressive/H-host/target/lib/libc.a).
1177     3) make the change to reloc.c
1178     4) rebuild the linker
1179     5) repeat step 2
1180     6) if the resulting object files are the same, you have at least
1181        made it no worse
1182     7) if they are different you have to figure out which version is
1183        right
1184 */
1185           relocation -= reloc_entry->addend;
1186 #endif
1187           reloc_entry->addend = 0;
1188         }
1189       else
1190         {
1191           reloc_entry->addend = relocation;
1192         }
1193     }
1194
1195   /* FIXME: This overflow checking is incomplete, because the value
1196      might have overflowed before we get here.  For a correct check we
1197      need to compute the value in a size larger than bitsize, but we
1198      can't reasonably do that for a reloc the same size as a host
1199      machine word.
1200      FIXME: We should also do overflow checking on the result after
1201      adding in the value contained in the object file.  */
1202   if (howto->complain_on_overflow != complain_overflow_dont)
1203     flag = bfd_check_overflow (howto->complain_on_overflow,
1204                                howto->bitsize,
1205                                howto->rightshift,
1206                                bfd_arch_bits_per_address (abfd),
1207                                relocation);
1208
1209   /*
1210     Either we are relocating all the way, or we don't want to apply
1211     the relocation to the reloc entry (probably because there isn't
1212     any room in the output format to describe addends to relocs)
1213     */
1214
1215   /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
1216      (OSF version 1.3, compiler version 3.11).  It miscompiles the
1217      following program:
1218
1219      struct str
1220      {
1221        unsigned int i0;
1222      } s = { 0 };
1223
1224      int
1225      main ()
1226      {
1227        unsigned long x;
1228
1229        x = 0x100000000;
1230        x <<= (unsigned long) s.i0;
1231        if (x == 0)
1232          printf ("failed\n");
1233        else
1234          printf ("succeeded (%lx)\n", x);
1235      }
1236      */
1237
1238   relocation >>= (bfd_vma) howto->rightshift;
1239
1240   /* Shift everything up to where it's going to be used */
1241
1242   relocation <<= (bfd_vma) howto->bitpos;
1243
1244   /* Wait for the day when all have the mask in them */
1245
1246   /* What we do:
1247      i instruction to be left alone
1248      o offset within instruction
1249      r relocation offset to apply
1250      S src mask
1251      D dst mask
1252      N ~dst mask
1253      A part 1
1254      B part 2
1255      R result
1256
1257      Do this:
1258      ((  i i i i i o o o o o  from bfd_get<size>
1259      and           S S S S S) to get the size offset we want
1260      +   r r r r r r r r r r) to get the final value to place
1261      and           D D D D D  to chop to right size
1262      -----------------------
1263      =             A A A A A
1264      And this:
1265      (   i i i i i o o o o o  from bfd_get<size>
1266      and N N N N N          ) get instruction
1267      -----------------------
1268      =   B B B B B
1269
1270      And then:
1271      (   B B B B B
1272      or            A A A A A)
1273      -----------------------
1274      =   R R R R R R R R R R  put into bfd_put<size>
1275      */
1276
1277 #define DOIT(x) \
1278   x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))
1279
1280   data = (bfd_byte *) data_start + (octets - data_start_offset);
1281
1282   switch (howto->size)
1283     {
1284     case 0:
1285       {
1286         char x = bfd_get_8 (abfd, (char *) data);
1287         DOIT (x);
1288         bfd_put_8 (abfd, x, (unsigned char *) data);
1289       }
1290       break;
1291
1292     case 1:
1293       {
1294         short x = bfd_get_16 (abfd, (bfd_byte *) data);
1295         DOIT (x);
1296         bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data);
1297       }
1298       break;
1299     case 2:
1300       {
1301         long x = bfd_get_32 (abfd, (bfd_byte *) data);
1302         DOIT (x);
1303         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data);
1304       }
1305       break;
1306     case -2:
1307       {
1308         long x = bfd_get_32 (abfd, (bfd_byte *) data);
1309         relocation = -relocation;
1310         DOIT (x);
1311         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data);
1312       }
1313       break;
1314
1315     case 3:
1316       /* Do nothing */
1317       break;
1318
1319     case 4:
1320       {
1321         bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data);
1322         DOIT (x);
1323         bfd_put_64 (abfd, x, (bfd_byte *) data);
1324       }
1325       break;
1326     default:
1327       return bfd_reloc_other;
1328     }
1329
1330   return flag;
1331 }
1332
1333 /* This relocation routine is used by some of the backend linkers.
1334    They do not construct asymbol or arelent structures, so there is no
1335    reason for them to use bfd_perform_relocation.  Also,
1336    bfd_perform_relocation is so hacked up it is easier to write a new
1337    function than to try to deal with it.
1338
1339    This routine does a final relocation.  Whether it is useful for a
1340    relocateable link depends upon how the object format defines
1341    relocations.
1342
1343    FIXME: This routine ignores any special_function in the HOWTO,
1344    since the existing special_function values have been written for
1345    bfd_perform_relocation.
1346
1347    HOWTO is the reloc howto information.
1348    INPUT_BFD is the BFD which the reloc applies to.
1349    INPUT_SECTION is the section which the reloc applies to.
1350    CONTENTS is the contents of the section.
1351    ADDRESS is the address of the reloc within INPUT_SECTION.
1352    VALUE is the value of the symbol the reloc refers to.
1353    ADDEND is the addend of the reloc.  */
1354
1355 bfd_reloc_status_type
1356 _bfd_final_link_relocate (howto, input_bfd, input_section, contents, address,
1357                           value, addend)
1358      reloc_howto_type *howto;
1359      bfd *input_bfd;
1360      asection *input_section;
1361      bfd_byte *contents;
1362      bfd_vma address;
1363      bfd_vma value;
1364      bfd_vma addend;
1365 {
1366   bfd_vma relocation;
1367
1368   /* Sanity check the address.  */
1369   if (address > input_section->_raw_size)
1370     return bfd_reloc_outofrange;
1371
1372   /* This function assumes that we are dealing with a basic relocation
1373      against a symbol.  We want to compute the value of the symbol to
1374      relocate to.  This is just VALUE, the value of the symbol, plus
1375      ADDEND, any addend associated with the reloc.  */
1376   relocation = value + addend;
1377
1378   /* If the relocation is PC relative, we want to set RELOCATION to
1379      the distance between the symbol (currently in RELOCATION) and the
1380      location we are relocating.  Some targets (e.g., i386-aout)
1381      arrange for the contents of the section to be the negative of the
1382      offset of the location within the section; for such targets
1383      pcrel_offset is false.  Other targets (e.g., m88kbcs or ELF)
1384      simply leave the contents of the section as zero; for such
1385      targets pcrel_offset is true.  If pcrel_offset is false we do not
1386      need to subtract out the offset of the location within the
1387      section (which is just ADDRESS).  */
1388   if (howto->pc_relative)
1389     {
1390       relocation -= (input_section->output_section->vma
1391                      + input_section->output_offset);
1392       if (howto->pcrel_offset)
1393         relocation -= address;
1394     }
1395
1396   return _bfd_relocate_contents (howto, input_bfd, relocation,
1397                                  contents + address);
1398 }
1399
1400 /* Relocate a given location using a given value and howto.  */
1401
1402 bfd_reloc_status_type
1403 _bfd_relocate_contents (howto, input_bfd, relocation, location)
1404      reloc_howto_type *howto;
1405      bfd *input_bfd;
1406      bfd_vma relocation;
1407      bfd_byte *location;
1408 {
1409   int size;
1410   bfd_vma x = 0;
1411   bfd_reloc_status_type flag;
1412   unsigned int rightshift = howto->rightshift;
1413   unsigned int bitpos = howto->bitpos;
1414
1415   /* If the size is negative, negate RELOCATION.  This isn't very
1416      general.  */
1417   if (howto->size < 0)
1418     relocation = -relocation;
1419
1420   /* Get the value we are going to relocate.  */
1421   size = bfd_get_reloc_size (howto);
1422   switch (size)
1423     {
1424     default:
1425     case 0:
1426       abort ();
1427     case 1:
1428       x = bfd_get_8 (input_bfd, location);
1429       break;
1430     case 2:
1431       x = bfd_get_16 (input_bfd, location);
1432       break;
1433     case 4:
1434       x = bfd_get_32 (input_bfd, location);
1435       break;
1436     case 8:
1437 #ifdef BFD64
1438       x = bfd_get_64 (input_bfd, location);
1439 #else
1440       abort ();
1441 #endif
1442       break;
1443     }
1444
1445   /* Check for overflow.  FIXME: We may drop bits during the addition
1446      which we don't check for.  We must either check at every single
1447      operation, which would be tedious, or we must do the computations
1448      in a type larger than bfd_vma, which would be inefficient.  */
1449   flag = bfd_reloc_ok;
1450   if (howto->complain_on_overflow != complain_overflow_dont)
1451     {
1452       bfd_vma addrmask, fieldmask, signmask, ss;
1453       bfd_vma a, b, sum;
1454
1455       /* Get the values to be added together.  For signed and unsigned
1456          relocations, we assume that all values should be truncated to
1457          the size of an address.  For bitfields, all the bits matter.
1458          See also bfd_check_overflow.  */
1459       fieldmask = N_ONES (howto->bitsize);
1460       addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask;
1461       a = relocation;
1462       b = x & howto->src_mask;
1463
1464       switch (howto->complain_on_overflow)
1465         {
1466         case complain_overflow_signed:
1467           a = (a & addrmask) >> rightshift;
1468
1469           /* If any sign bits are set, all sign bits must be set.
1470              That is, A must be a valid negative address after
1471              shifting.  */
1472           signmask = ~ (fieldmask >> 1);
1473           ss = a & signmask;
1474           if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
1475             flag = bfd_reloc_overflow;
1476
1477           /* We only need this next bit of code if the sign bit of B
1478              is below the sign bit of A.  This would only happen if
1479              SRC_MASK had fewer bits than BITSIZE.  Note that if
1480              SRC_MASK has more bits than BITSIZE, we can get into
1481              trouble; we would need to verify that B is in range, as
1482              we do for A above.  */
1483           signmask = ((~ howto->src_mask) >> 1) & howto->src_mask;
1484
1485           /* Set all the bits above the sign bit.  */
1486           b = (b ^ signmask) - signmask;
1487
1488           b = (b & addrmask) >> bitpos;
1489
1490           /* Now we can do the addition.  */
1491           sum = a + b;
1492
1493           /* See if the result has the correct sign.  Bits above the
1494              sign bit are junk now; ignore them.  If the sum is
1495              positive, make sure we did not have all negative inputs;
1496              if the sum is negative, make sure we did not have all
1497              positive inputs.  The test below looks only at the sign
1498              bits, and it really just
1499                  SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM)
1500              */
1501           signmask = (fieldmask >> 1) + 1;
1502           if (((~ (a ^ b)) & (a ^ sum)) & signmask)
1503             flag = bfd_reloc_overflow;
1504
1505           break;
1506
1507         case complain_overflow_unsigned:
1508           /* Checking for an unsigned overflow is relatively easy:
1509              trim the addresses and add, and trim the result as well.
1510              Overflow is normally indicated when the result does not
1511              fit in the field.  However, we also need to consider the
1512              case when, e.g., fieldmask is 0x7fffffff or smaller, an
1513              input is 0x80000000, and bfd_vma is only 32 bits; then we
1514              will get sum == 0, but there is an overflow, since the
1515              inputs did not fit in the field.  Instead of doing a
1516              separate test, we can check for this by or-ing in the
1517              operands when testing for the sum overflowing its final
1518              field.  */
1519           a = (a & addrmask) >> rightshift;
1520           b = (b & addrmask) >> bitpos;
1521           sum = (a + b) & addrmask;
1522           if ((a | b | sum) & ~ fieldmask)
1523             flag = bfd_reloc_overflow;
1524
1525           break;
1526
1527         case complain_overflow_bitfield:
1528           /* Much like the signed check, but for a field one bit
1529              wider, and no trimming inputs with addrmask.  We allow a
1530              bitfield to represent numbers in the range -2**n to
1531              2**n-1, where n is the number of bits in the field.
1532              Note that when bfd_vma is 32 bits, a 32-bit reloc can't
1533              overflow, which is exactly what we want.  */
1534           a >>= rightshift;
1535
1536           signmask = ~ fieldmask;
1537           ss = a & signmask;
1538           if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & signmask))
1539             flag = bfd_reloc_overflow;
1540
1541           signmask = ((~ howto->src_mask) >> 1) & howto->src_mask;
1542           b = (b ^ signmask) - signmask;
1543
1544           b >>= bitpos;
1545
1546           sum = a + b;
1547
1548           /* We mask with addrmask here to explicitly allow an address
1549              wrap-around.  The Linux kernel relies on it, and it is
1550              the only way to write assembler code which can run when
1551              loaded at a location 0x80000000 away from the location at
1552              which it is linked.  */
1553           signmask = fieldmask + 1;
1554           if (((~ (a ^ b)) & (a ^ sum)) & signmask & addrmask)
1555             flag = bfd_reloc_overflow;
1556
1557           break;
1558
1559         default:
1560           abort ();
1561         }
1562     }
1563
1564   /* Put RELOCATION in the right bits.  */
1565   relocation >>= (bfd_vma) rightshift;
1566   relocation <<= (bfd_vma) bitpos;
1567
1568   /* Add RELOCATION to the right bits of X.  */
1569   x = ((x & ~howto->dst_mask)
1570        | (((x & howto->src_mask) + relocation) & howto->dst_mask));
1571
1572   /* Put the relocated value back in the object file.  */
1573   switch (size)
1574     {
1575     default:
1576     case 0:
1577       abort ();
1578     case 1:
1579       bfd_put_8 (input_bfd, x, location);
1580       break;
1581     case 2:
1582       bfd_put_16 (input_bfd, x, location);
1583       break;
1584     case 4:
1585       bfd_put_32 (input_bfd, x, location);
1586       break;
1587     case 8:
1588 #ifdef BFD64
1589       bfd_put_64 (input_bfd, x, location);
1590 #else
1591       abort ();
1592 #endif
1593       break;
1594     }
1595
1596   return flag;
1597 }
1598
1599 /*
1600 DOCDD
1601 INODE
1602         howto manager,  , typedef arelent, Relocations
1603
1604 SECTION
1605         The howto manager
1606
1607         When an application wants to create a relocation, but doesn't
1608         know what the target machine might call it, it can find out by
1609         using this bit of code.
1610
1611 */
1612
1613 /*
1614 TYPEDEF
1615         bfd_reloc_code_type
1616
1617 DESCRIPTION
1618         The insides of a reloc code.  The idea is that, eventually, there
1619         will be one enumerator for every type of relocation we ever do.
1620         Pass one of these values to <<bfd_reloc_type_lookup>>, and it'll
1621         return a howto pointer.
1622
1623         This does mean that the application must determine the correct
1624         enumerator value; you can't get a howto pointer from a random set
1625         of attributes.
1626
1627 SENUM
1628    bfd_reloc_code_real
1629
1630 ENUM
1631   BFD_RELOC_64
1632 ENUMX
1633   BFD_RELOC_32
1634 ENUMX
1635   BFD_RELOC_26
1636 ENUMX
1637   BFD_RELOC_24
1638 ENUMX
1639   BFD_RELOC_16
1640 ENUMX
1641   BFD_RELOC_14
1642 ENUMX
1643   BFD_RELOC_8
1644 ENUMDOC
1645   Basic absolute relocations of N bits.
1646
1647 ENUM
1648   BFD_RELOC_64_PCREL
1649 ENUMX
1650   BFD_RELOC_32_PCREL
1651 ENUMX
1652   BFD_RELOC_24_PCREL
1653 ENUMX
1654   BFD_RELOC_16_PCREL
1655 ENUMX
1656   BFD_RELOC_12_PCREL
1657 ENUMX
1658   BFD_RELOC_8_PCREL
1659 ENUMDOC
1660   PC-relative relocations.  Sometimes these are relative to the address
1661 of the relocation itself; sometimes they are relative to the start of
1662 the section containing the relocation.  It depends on the specific target.
1663
1664 The 24-bit relocation is used in some Intel 960 configurations.
1665
1666 ENUM
1667   BFD_RELOC_32_GOT_PCREL
1668 ENUMX
1669   BFD_RELOC_16_GOT_PCREL
1670 ENUMX
1671   BFD_RELOC_8_GOT_PCREL
1672 ENUMX
1673   BFD_RELOC_32_GOTOFF
1674 ENUMX
1675   BFD_RELOC_16_GOTOFF
1676 ENUMX
1677   BFD_RELOC_LO16_GOTOFF
1678 ENUMX
1679   BFD_RELOC_HI16_GOTOFF
1680 ENUMX
1681   BFD_RELOC_HI16_S_GOTOFF
1682 ENUMX
1683   BFD_RELOC_8_GOTOFF
1684 ENUMX
1685   BFD_RELOC_64_PLT_PCREL
1686 ENUMX
1687   BFD_RELOC_32_PLT_PCREL
1688 ENUMX
1689   BFD_RELOC_24_PLT_PCREL
1690 ENUMX
1691   BFD_RELOC_16_PLT_PCREL
1692 ENUMX
1693   BFD_RELOC_8_PLT_PCREL
1694 ENUMX
1695   BFD_RELOC_64_PLTOFF
1696 ENUMX
1697   BFD_RELOC_32_PLTOFF
1698 ENUMX
1699   BFD_RELOC_16_PLTOFF
1700 ENUMX
1701   BFD_RELOC_LO16_PLTOFF
1702 ENUMX
1703   BFD_RELOC_HI16_PLTOFF
1704 ENUMX
1705   BFD_RELOC_HI16_S_PLTOFF
1706 ENUMX
1707   BFD_RELOC_8_PLTOFF
1708 ENUMDOC
1709   For ELF.
1710
1711 ENUM
1712   BFD_RELOC_68K_GLOB_DAT
1713 ENUMX
1714   BFD_RELOC_68K_JMP_SLOT
1715 ENUMX
1716   BFD_RELOC_68K_RELATIVE
1717 ENUMDOC
1718   Relocations used by 68K ELF.
1719
1720 ENUM
1721   BFD_RELOC_32_BASEREL
1722 ENUMX
1723   BFD_RELOC_16_BASEREL
1724 ENUMX
1725   BFD_RELOC_LO16_BASEREL
1726 ENUMX
1727   BFD_RELOC_HI16_BASEREL
1728 ENUMX
1729   BFD_RELOC_HI16_S_BASEREL
1730 ENUMX
1731   BFD_RELOC_8_BASEREL
1732 ENUMX
1733   BFD_RELOC_RVA
1734 ENUMDOC
1735   Linkage-table relative.
1736
1737 ENUM
1738   BFD_RELOC_8_FFnn
1739 ENUMDOC
1740   Absolute 8-bit relocation, but used to form an address like 0xFFnn.
1741
1742 ENUM
1743   BFD_RELOC_32_PCREL_S2
1744 ENUMX
1745   BFD_RELOC_16_PCREL_S2
1746 ENUMX
1747   BFD_RELOC_23_PCREL_S2
1748 ENUMDOC
1749   These PC-relative relocations are stored as word displacements --
1750 i.e., byte displacements shifted right two bits.  The 30-bit word
1751 displacement (<<32_PCREL_S2>> -- 32 bits, shifted 2) is used on the
1752 SPARC.  (SPARC tools generally refer to this as <<WDISP30>>.)  The
1753 signed 16-bit displacement is used on the MIPS, and the 23-bit
1754 displacement is used on the Alpha.
1755
1756 ENUM
1757   BFD_RELOC_HI22
1758 ENUMX
1759   BFD_RELOC_LO10
1760 ENUMDOC
1761   High 22 bits and low 10 bits of 32-bit value, placed into lower bits of
1762 the target word.  These are used on the SPARC.
1763
1764 ENUM
1765   BFD_RELOC_GPREL16
1766 ENUMX
1767   BFD_RELOC_GPREL32
1768 ENUMDOC
1769   For systems that allocate a Global Pointer register, these are
1770 displacements off that register.  These relocation types are
1771 handled specially, because the value the register will have is
1772 decided relatively late.
1773
1774 ENUM
1775   BFD_RELOC_I960_CALLJ
1776 ENUMDOC
1777   Reloc types used for i960/b.out.
1778
1779 ENUM
1780   BFD_RELOC_NONE
1781 ENUMX
1782   BFD_RELOC_SPARC_WDISP22
1783 ENUMX
1784   BFD_RELOC_SPARC22
1785 ENUMX
1786   BFD_RELOC_SPARC13
1787 ENUMX
1788   BFD_RELOC_SPARC_GOT10
1789 ENUMX
1790   BFD_RELOC_SPARC_GOT13
1791 ENUMX
1792   BFD_RELOC_SPARC_GOT22
1793 ENUMX
1794   BFD_RELOC_SPARC_PC10
1795 ENUMX
1796   BFD_RELOC_SPARC_PC22
1797 ENUMX
1798   BFD_RELOC_SPARC_WPLT30
1799 ENUMX
1800   BFD_RELOC_SPARC_COPY
1801 ENUMX
1802   BFD_RELOC_SPARC_GLOB_DAT
1803 ENUMX
1804   BFD_RELOC_SPARC_JMP_SLOT
1805 ENUMX
1806   BFD_RELOC_SPARC_RELATIVE
1807 ENUMX
1808   BFD_RELOC_SPARC_UA16
1809 ENUMX
1810   BFD_RELOC_SPARC_UA32
1811 ENUMX
1812   BFD_RELOC_SPARC_UA64
1813 ENUMDOC
1814   SPARC ELF relocations.  There is probably some overlap with other
1815   relocation types already defined.
1816
1817 ENUM
1818   BFD_RELOC_SPARC_BASE13
1819 ENUMX
1820   BFD_RELOC_SPARC_BASE22
1821 ENUMDOC
1822   I think these are specific to SPARC a.out (e.g., Sun 4).
1823
1824 ENUMEQ
1825   BFD_RELOC_SPARC_64
1826   BFD_RELOC_64
1827 ENUMX
1828   BFD_RELOC_SPARC_10
1829 ENUMX
1830   BFD_RELOC_SPARC_11
1831 ENUMX
1832   BFD_RELOC_SPARC_OLO10
1833 ENUMX
1834   BFD_RELOC_SPARC_HH22
1835 ENUMX
1836   BFD_RELOC_SPARC_HM10
1837 ENUMX
1838   BFD_RELOC_SPARC_LM22
1839 ENUMX
1840   BFD_RELOC_SPARC_PC_HH22
1841 ENUMX
1842   BFD_RELOC_SPARC_PC_HM10
1843 ENUMX
1844   BFD_RELOC_SPARC_PC_LM22
1845 ENUMX
1846   BFD_RELOC_SPARC_WDISP16
1847 ENUMX
1848   BFD_RELOC_SPARC_WDISP19
1849 ENUMX
1850   BFD_RELOC_SPARC_7
1851 ENUMX
1852   BFD_RELOC_SPARC_6
1853 ENUMX
1854   BFD_RELOC_SPARC_5
1855 ENUMEQX
1856   BFD_RELOC_SPARC_DISP64
1857   BFD_RELOC_64_PCREL
1858 ENUMX
1859   BFD_RELOC_SPARC_PLT64
1860 ENUMX
1861   BFD_RELOC_SPARC_HIX22
1862 ENUMX
1863   BFD_RELOC_SPARC_LOX10
1864 ENUMX
1865   BFD_RELOC_SPARC_H44
1866 ENUMX
1867   BFD_RELOC_SPARC_M44
1868 ENUMX
1869   BFD_RELOC_SPARC_L44
1870 ENUMX
1871   BFD_RELOC_SPARC_REGISTER
1872 ENUMDOC
1873   SPARC64 relocations
1874
1875 ENUM
1876   BFD_RELOC_SPARC_REV32
1877 ENUMDOC
1878   SPARC little endian relocation
1879
1880 ENUM
1881   BFD_RELOC_ALPHA_GPDISP_HI16
1882 ENUMDOC
1883   Alpha ECOFF and ELF relocations.  Some of these treat the symbol or
1884      "addend" in some special way.
1885   For GPDISP_HI16 ("gpdisp") relocations, the symbol is ignored when
1886      writing; when reading, it will be the absolute section symbol.  The
1887      addend is the displacement in bytes of the "lda" instruction from
1888      the "ldah" instruction (which is at the address of this reloc).
1889 ENUM
1890   BFD_RELOC_ALPHA_GPDISP_LO16
1891 ENUMDOC
1892   For GPDISP_LO16 ("ignore") relocations, the symbol is handled as
1893      with GPDISP_HI16 relocs.  The addend is ignored when writing the
1894      relocations out, and is filled in with the file's GP value on
1895      reading, for convenience.
1896
1897 ENUM
1898   BFD_RELOC_ALPHA_GPDISP
1899 ENUMDOC
1900   The ELF GPDISP relocation is exactly the same as the GPDISP_HI16
1901      relocation except that there is no accompanying GPDISP_LO16
1902      relocation.
1903
1904 ENUM
1905   BFD_RELOC_ALPHA_LITERAL
1906 ENUMX
1907   BFD_RELOC_ALPHA_ELF_LITERAL
1908 ENUMX
1909   BFD_RELOC_ALPHA_LITUSE
1910 ENUMDOC
1911   The Alpha LITERAL/LITUSE relocs are produced by a symbol reference;
1912      the assembler turns it into a LDQ instruction to load the address of
1913      the symbol, and then fills in a register in the real instruction.
1914
1915      The LITERAL reloc, at the LDQ instruction, refers to the .lita
1916      section symbol.  The addend is ignored when writing, but is filled
1917      in with the file's GP value on reading, for convenience, as with the
1918      GPDISP_LO16 reloc.
1919
1920      The ELF_LITERAL reloc is somewhere between 16_GOTOFF and GPDISP_LO16.
1921      It should refer to the symbol to be referenced, as with 16_GOTOFF,
1922      but it generates output not based on the position within the .got
1923      section, but relative to the GP value chosen for the file during the
1924      final link stage.
1925
1926      The LITUSE reloc, on the instruction using the loaded address, gives
1927      information to the linker that it might be able to use to optimize
1928      away some literal section references.  The symbol is ignored (read
1929      as the absolute section symbol), and the "addend" indicates the type
1930      of instruction using the register:
1931               1 - "memory" fmt insn
1932               2 - byte-manipulation (byte offset reg)
1933               3 - jsr (target of branch)
1934
1935 ENUM
1936   BFD_RELOC_ALPHA_HINT
1937 ENUMDOC
1938   The HINT relocation indicates a value that should be filled into the
1939      "hint" field of a jmp/jsr/ret instruction, for possible branch-
1940      prediction logic which may be provided on some processors.
1941
1942 ENUM
1943   BFD_RELOC_ALPHA_LINKAGE
1944 ENUMDOC
1945   The LINKAGE relocation outputs a linkage pair in the object file,
1946      which is filled by the linker.
1947
1948 ENUM
1949   BFD_RELOC_ALPHA_CODEADDR
1950 ENUMDOC
1951   The CODEADDR relocation outputs a STO_CA in the object file,
1952      which is filled by the linker.
1953
1954 ENUM
1955   BFD_RELOC_ALPHA_GPREL_HI16
1956 ENUMX
1957   BFD_RELOC_ALPHA_GPREL_LO16
1958 ENUMDOC
1959   The GPREL_HI/LO relocations together form a 32-bit offset from the
1960      GP register.
1961
1962 ENUM
1963   BFD_RELOC_MIPS_JMP
1964 ENUMDOC
1965   Bits 27..2 of the relocation address shifted right 2 bits;
1966      simple reloc otherwise.
1967
1968 ENUM
1969   BFD_RELOC_MIPS16_JMP
1970 ENUMDOC
1971   The MIPS16 jump instruction.
1972
1973 ENUM
1974   BFD_RELOC_MIPS16_GPREL
1975 ENUMDOC
1976   MIPS16 GP relative reloc.
1977
1978 ENUM
1979   BFD_RELOC_HI16
1980 ENUMDOC
1981   High 16 bits of 32-bit value; simple reloc.
1982 ENUM
1983   BFD_RELOC_HI16_S
1984 ENUMDOC
1985   High 16 bits of 32-bit value but the low 16 bits will be sign
1986      extended and added to form the final result.  If the low 16
1987      bits form a negative number, we need to add one to the high value
1988      to compensate for the borrow when the low bits are added.
1989 ENUM
1990   BFD_RELOC_LO16
1991 ENUMDOC
1992   Low 16 bits.
1993 ENUM
1994   BFD_RELOC_PCREL_HI16_S
1995 ENUMDOC
1996   Like BFD_RELOC_HI16_S, but PC relative.
1997 ENUM
1998   BFD_RELOC_PCREL_LO16
1999 ENUMDOC
2000   Like BFD_RELOC_LO16, but PC relative.
2001
2002 ENUMEQ
2003   BFD_RELOC_MIPS_GPREL
2004   BFD_RELOC_GPREL16
2005 ENUMDOC
2006   Relocation relative to the global pointer.
2007
2008 ENUM
2009   BFD_RELOC_MIPS_LITERAL
2010 ENUMDOC
2011   Relocation against a MIPS literal section.
2012
2013 ENUM
2014   BFD_RELOC_MIPS_GOT16
2015 ENUMX
2016   BFD_RELOC_MIPS_CALL16
2017 ENUMEQX
2018   BFD_RELOC_MIPS_GPREL32
2019   BFD_RELOC_GPREL32
2020 ENUMX
2021   BFD_RELOC_MIPS_GOT_HI16
2022 ENUMX
2023   BFD_RELOC_MIPS_GOT_LO16
2024 ENUMX
2025   BFD_RELOC_MIPS_CALL_HI16
2026 ENUMX
2027   BFD_RELOC_MIPS_CALL_LO16
2028 ENUMX
2029   BFD_RELOC_MIPS_SUB
2030 ENUMX
2031   BFD_RELOC_MIPS_GOT_PAGE
2032 ENUMX
2033   BFD_RELOC_MIPS_GOT_OFST
2034 ENUMX
2035   BFD_RELOC_MIPS_GOT_DISP
2036 ENUMX
2037   BFD_RELOC_MIPS_SHIFT5
2038 ENUMX
2039   BFD_RELOC_MIPS_SHIFT6
2040 ENUMX
2041   BFD_RELOC_MIPS_INSERT_A
2042 ENUMX
2043   BFD_RELOC_MIPS_INSERT_B
2044 ENUMX
2045   BFD_RELOC_MIPS_DELETE
2046 ENUMX
2047   BFD_RELOC_MIPS_HIGHEST
2048 ENUMX
2049   BFD_RELOC_MIPS_HIGHER
2050 ENUMX
2051   BFD_RELOC_MIPS_SCN_DISP
2052 ENUMX
2053   BFD_RELOC_MIPS_REL16
2054 ENUMX
2055   BFD_RELOC_MIPS_RELGOT
2056 ENUMX
2057   BFD_RELOC_MIPS_JALR
2058 COMMENT
2059 ENUMDOC
2060   MIPS ELF relocations.
2061
2062 COMMENT
2063
2064 ENUM
2065   BFD_RELOC_386_GOT32
2066 ENUMX
2067   BFD_RELOC_386_PLT32
2068 ENUMX
2069   BFD_RELOC_386_COPY
2070 ENUMX
2071   BFD_RELOC_386_GLOB_DAT
2072 ENUMX
2073   BFD_RELOC_386_JUMP_SLOT
2074 ENUMX
2075   BFD_RELOC_386_RELATIVE
2076 ENUMX
2077   BFD_RELOC_386_GOTOFF
2078 ENUMX
2079   BFD_RELOC_386_GOTPC
2080 ENUMDOC
2081   i386/elf relocations
2082
2083 ENUM
2084   BFD_RELOC_X86_64_GOT32
2085 ENUMX
2086   BFD_RELOC_X86_64_PLT32
2087 ENUMX
2088   BFD_RELOC_X86_64_COPY
2089 ENUMX
2090   BFD_RELOC_X86_64_GLOB_DAT
2091 ENUMX
2092   BFD_RELOC_X86_64_JUMP_SLOT
2093 ENUMX
2094   BFD_RELOC_X86_64_RELATIVE
2095 ENUMX
2096   BFD_RELOC_X86_64_GOTPCREL
2097 ENUMX
2098   BFD_RELOC_X86_64_32S
2099 ENUMDOC
2100   x86-64/elf relocations
2101
2102 ENUM
2103   BFD_RELOC_NS32K_IMM_8
2104 ENUMX
2105   BFD_RELOC_NS32K_IMM_16
2106 ENUMX
2107   BFD_RELOC_NS32K_IMM_32
2108 ENUMX
2109   BFD_RELOC_NS32K_IMM_8_PCREL
2110 ENUMX
2111   BFD_RELOC_NS32K_IMM_16_PCREL
2112 ENUMX
2113   BFD_RELOC_NS32K_IMM_32_PCREL
2114 ENUMX
2115   BFD_RELOC_NS32K_DISP_8
2116 ENUMX
2117   BFD_RELOC_NS32K_DISP_16
2118 ENUMX
2119   BFD_RELOC_NS32K_DISP_32
2120 ENUMX
2121   BFD_RELOC_NS32K_DISP_8_PCREL
2122 ENUMX
2123   BFD_RELOC_NS32K_DISP_16_PCREL
2124 ENUMX
2125   BFD_RELOC_NS32K_DISP_32_PCREL
2126 ENUMDOC
2127   ns32k relocations
2128
2129 ENUM
2130   BFD_RELOC_PDP11_DISP_8_PCREL
2131 ENUMX
2132   BFD_RELOC_PDP11_DISP_6_PCREL
2133 ENUMDOC
2134   PDP11 relocations
2135
2136 ENUM
2137   BFD_RELOC_PJ_CODE_HI16
2138 ENUMX
2139   BFD_RELOC_PJ_CODE_LO16
2140 ENUMX
2141   BFD_RELOC_PJ_CODE_DIR16
2142 ENUMX
2143   BFD_RELOC_PJ_CODE_DIR32
2144 ENUMX
2145   BFD_RELOC_PJ_CODE_REL16
2146 ENUMX
2147   BFD_RELOC_PJ_CODE_REL32
2148 ENUMDOC
2149   Picojava relocs.  Not all of these appear in object files.
2150
2151 ENUM
2152   BFD_RELOC_PPC_B26
2153 ENUMX
2154   BFD_RELOC_PPC_BA26
2155 ENUMX
2156   BFD_RELOC_PPC_TOC16
2157 ENUMX
2158   BFD_RELOC_PPC_B16
2159 ENUMX
2160   BFD_RELOC_PPC_B16_BRTAKEN
2161 ENUMX
2162   BFD_RELOC_PPC_B16_BRNTAKEN
2163 ENUMX
2164   BFD_RELOC_PPC_BA16
2165 ENUMX
2166   BFD_RELOC_PPC_BA16_BRTAKEN
2167 ENUMX
2168   BFD_RELOC_PPC_BA16_BRNTAKEN
2169 ENUMX
2170   BFD_RELOC_PPC_COPY
2171 ENUMX
2172   BFD_RELOC_PPC_GLOB_DAT
2173 ENUMX
2174   BFD_RELOC_PPC_JMP_SLOT
2175 ENUMX
2176   BFD_RELOC_PPC_RELATIVE
2177 ENUMX
2178   BFD_RELOC_PPC_LOCAL24PC
2179 ENUMX
2180   BFD_RELOC_PPC_EMB_NADDR32
2181 ENUMX
2182   BFD_RELOC_PPC_EMB_NADDR16
2183 ENUMX
2184   BFD_RELOC_PPC_EMB_NADDR16_LO
2185 ENUMX
2186   BFD_RELOC_PPC_EMB_NADDR16_HI
2187 ENUMX
2188   BFD_RELOC_PPC_EMB_NADDR16_HA
2189 ENUMX
2190   BFD_RELOC_PPC_EMB_SDAI16
2191 ENUMX
2192   BFD_RELOC_PPC_EMB_SDA2I16
2193 ENUMX
2194   BFD_RELOC_PPC_EMB_SDA2REL
2195 ENUMX
2196   BFD_RELOC_PPC_EMB_SDA21
2197 ENUMX
2198   BFD_RELOC_PPC_EMB_MRKREF
2199 ENUMX
2200   BFD_RELOC_PPC_EMB_RELSEC16
2201 ENUMX
2202   BFD_RELOC_PPC_EMB_RELST_LO
2203 ENUMX
2204   BFD_RELOC_PPC_EMB_RELST_HI
2205 ENUMX
2206   BFD_RELOC_PPC_EMB_RELST_HA
2207 ENUMX
2208   BFD_RELOC_PPC_EMB_BIT_FLD
2209 ENUMX
2210   BFD_RELOC_PPC_EMB_RELSDA
2211 ENUMX
2212   BFD_RELOC_PPC64_HIGHER
2213 ENUMX
2214   BFD_RELOC_PPC64_HIGHER_S
2215 ENUMX
2216   BFD_RELOC_PPC64_HIGHEST
2217 ENUMX
2218   BFD_RELOC_PPC64_HIGHEST_S
2219 ENUMX
2220   BFD_RELOC_PPC64_TOC16_LO
2221 ENUMX
2222   BFD_RELOC_PPC64_TOC16_HI
2223 ENUMX
2224   BFD_RELOC_PPC64_TOC16_HA
2225 ENUMX
2226   BFD_RELOC_PPC64_TOC
2227 ENUMX
2228   BFD_RELOC_PPC64_PLTGOT16
2229 ENUMX
2230   BFD_RELOC_PPC64_PLTGOT16_LO
2231 ENUMX
2232   BFD_RELOC_PPC64_PLTGOT16_HI
2233 ENUMX
2234   BFD_RELOC_PPC64_PLTGOT16_HA
2235 ENUMX
2236   BFD_RELOC_PPC64_ADDR16_DS
2237 ENUMX
2238   BFD_RELOC_PPC64_ADDR16_LO_DS
2239 ENUMX
2240   BFD_RELOC_PPC64_GOT16_DS
2241 ENUMX
2242   BFD_RELOC_PPC64_GOT16_LO_DS
2243 ENUMX
2244   BFD_RELOC_PPC64_PLT16_LO_DS
2245 ENUMX
2246   BFD_RELOC_PPC64_SECTOFF_DS
2247 ENUMX
2248   BFD_RELOC_PPC64_SECTOFF_LO_DS
2249 ENUMX
2250   BFD_RELOC_PPC64_TOC16_DS
2251 ENUMX
2252   BFD_RELOC_PPC64_TOC16_LO_DS
2253 ENUMX
2254   BFD_RELOC_PPC64_PLTGOT16_DS
2255 ENUMX
2256   BFD_RELOC_PPC64_PLTGOT16_LO_DS
2257 ENUMDOC
2258   Power(rs6000) and PowerPC relocations.
2259
2260 ENUM
2261   BFD_RELOC_I370_D12
2262 ENUMDOC
2263   IBM 370/390 relocations
2264
2265 ENUM
2266   BFD_RELOC_CTOR
2267 ENUMDOC
2268   The type of reloc used to build a contructor table - at the moment
2269   probably a 32 bit wide absolute relocation, but the target can choose.
2270   It generally does map to one of the other relocation types.
2271
2272 ENUM
2273   BFD_RELOC_ARM_PCREL_BRANCH
2274 ENUMDOC
2275   ARM 26 bit pc-relative branch.  The lowest two bits must be zero and are
2276   not stored in the instruction.
2277 ENUM
2278   BFD_RELOC_ARM_PCREL_BLX
2279 ENUMDOC
2280   ARM 26 bit pc-relative branch.  The lowest bit must be zero and is
2281   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2282   field in the instruction.
2283 ENUM
2284   BFD_RELOC_THUMB_PCREL_BLX
2285 ENUMDOC
2286   Thumb 22 bit pc-relative branch.  The lowest bit must be zero and is
2287   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2288   field in the instruction.
2289 ENUM
2290   BFD_RELOC_ARM_IMMEDIATE
2291 ENUMX
2292   BFD_RELOC_ARM_ADRL_IMMEDIATE
2293 ENUMX
2294   BFD_RELOC_ARM_OFFSET_IMM
2295 ENUMX
2296   BFD_RELOC_ARM_SHIFT_IMM
2297 ENUMX
2298   BFD_RELOC_ARM_SWI
2299 ENUMX
2300   BFD_RELOC_ARM_MULTI
2301 ENUMX
2302   BFD_RELOC_ARM_CP_OFF_IMM
2303 ENUMX
2304   BFD_RELOC_ARM_ADR_IMM
2305 ENUMX
2306   BFD_RELOC_ARM_LDR_IMM
2307 ENUMX
2308   BFD_RELOC_ARM_LITERAL
2309 ENUMX
2310   BFD_RELOC_ARM_IN_POOL
2311 ENUMX
2312   BFD_RELOC_ARM_OFFSET_IMM8
2313 ENUMX
2314   BFD_RELOC_ARM_HWLITERAL
2315 ENUMX
2316   BFD_RELOC_ARM_THUMB_ADD
2317 ENUMX
2318   BFD_RELOC_ARM_THUMB_IMM
2319 ENUMX
2320   BFD_RELOC_ARM_THUMB_SHIFT
2321 ENUMX
2322   BFD_RELOC_ARM_THUMB_OFFSET
2323 ENUMX
2324   BFD_RELOC_ARM_GOT12
2325 ENUMX
2326   BFD_RELOC_ARM_GOT32
2327 ENUMX
2328   BFD_RELOC_ARM_JUMP_SLOT
2329 ENUMX
2330   BFD_RELOC_ARM_COPY
2331 ENUMX
2332   BFD_RELOC_ARM_GLOB_DAT
2333 ENUMX
2334   BFD_RELOC_ARM_PLT32
2335 ENUMX
2336   BFD_RELOC_ARM_RELATIVE
2337 ENUMX
2338   BFD_RELOC_ARM_GOTOFF
2339 ENUMX
2340   BFD_RELOC_ARM_GOTPC
2341 ENUMDOC
2342   These relocs are only used within the ARM assembler.  They are not
2343   (at present) written to any object files.
2344
2345 ENUM
2346   BFD_RELOC_SH_PCDISP8BY2
2347 ENUMX
2348   BFD_RELOC_SH_PCDISP12BY2
2349 ENUMX
2350   BFD_RELOC_SH_IMM4
2351 ENUMX
2352   BFD_RELOC_SH_IMM4BY2
2353 ENUMX
2354   BFD_RELOC_SH_IMM4BY4
2355 ENUMX
2356   BFD_RELOC_SH_IMM8
2357 ENUMX
2358   BFD_RELOC_SH_IMM8BY2
2359 ENUMX
2360   BFD_RELOC_SH_IMM8BY4
2361 ENUMX
2362   BFD_RELOC_SH_PCRELIMM8BY2
2363 ENUMX
2364   BFD_RELOC_SH_PCRELIMM8BY4
2365 ENUMX
2366   BFD_RELOC_SH_SWITCH16
2367 ENUMX
2368   BFD_RELOC_SH_SWITCH32
2369 ENUMX
2370   BFD_RELOC_SH_USES
2371 ENUMX
2372   BFD_RELOC_SH_COUNT
2373 ENUMX
2374   BFD_RELOC_SH_ALIGN
2375 ENUMX
2376   BFD_RELOC_SH_CODE
2377 ENUMX
2378   BFD_RELOC_SH_DATA
2379 ENUMX
2380   BFD_RELOC_SH_LABEL
2381 ENUMX
2382   BFD_RELOC_SH_LOOP_START
2383 ENUMX
2384   BFD_RELOC_SH_LOOP_END
2385 ENUMX
2386   BFD_RELOC_SH_COPY
2387 ENUMX
2388   BFD_RELOC_SH_GLOB_DAT
2389 ENUMX
2390   BFD_RELOC_SH_JMP_SLOT
2391 ENUMX
2392   BFD_RELOC_SH_RELATIVE
2393 ENUMX
2394   BFD_RELOC_SH_GOTPC
2395 ENUMDOC
2396   Hitachi SH relocs.  Not all of these appear in object files.
2397
2398 ENUM
2399   BFD_RELOC_THUMB_PCREL_BRANCH9
2400 ENUMX
2401   BFD_RELOC_THUMB_PCREL_BRANCH12
2402 ENUMX
2403   BFD_RELOC_THUMB_PCREL_BRANCH23
2404 ENUMDOC
2405   Thumb 23-, 12- and 9-bit pc-relative branches.  The lowest bit must
2406   be zero and is not stored in the instruction.
2407
2408 ENUM
2409   BFD_RELOC_ARC_B22_PCREL
2410 ENUMDOC
2411   ARC Cores relocs.
2412   ARC 22 bit pc-relative branch.  The lowest two bits must be zero and are
2413   not stored in the instruction.  The high 20 bits are installed in bits 26
2414   through 7 of the instruction.
2415 ENUM
2416   BFD_RELOC_ARC_B26
2417 ENUMDOC
2418   ARC 26 bit absolute branch.  The lowest two bits must be zero and are not
2419   stored in the instruction.  The high 24 bits are installed in bits 23
2420   through 0.
2421
2422 ENUM
2423   BFD_RELOC_D10V_10_PCREL_R
2424 ENUMDOC
2425   Mitsubishi D10V relocs.
2426   This is a 10-bit reloc with the right 2 bits
2427   assumed to be 0.
2428 ENUM
2429   BFD_RELOC_D10V_10_PCREL_L
2430 ENUMDOC
2431   Mitsubishi D10V relocs.
2432   This is a 10-bit reloc with the right 2 bits
2433   assumed to be 0.  This is the same as the previous reloc
2434   except it is in the left container, i.e.,
2435   shifted left 15 bits.
2436 ENUM
2437   BFD_RELOC_D10V_18
2438 ENUMDOC
2439   This is an 18-bit reloc with the right 2 bits
2440   assumed to be 0.
2441 ENUM
2442   BFD_RELOC_D10V_18_PCREL
2443 ENUMDOC
2444   This is an 18-bit reloc with the right 2 bits
2445   assumed to be 0.
2446
2447 ENUM
2448   BFD_RELOC_D30V_6
2449 ENUMDOC
2450   Mitsubishi D30V relocs.
2451   This is a 6-bit absolute reloc.
2452 ENUM
2453   BFD_RELOC_D30V_9_PCREL
2454 ENUMDOC
2455   This is a 6-bit pc-relative reloc with
2456   the right 3 bits assumed to be 0.
2457 ENUM
2458   BFD_RELOC_D30V_9_PCREL_R
2459 ENUMDOC
2460   This is a 6-bit pc-relative reloc with
2461   the right 3 bits assumed to be 0. Same
2462   as the previous reloc but on the right side
2463   of the container.
2464 ENUM
2465   BFD_RELOC_D30V_15
2466 ENUMDOC
2467   This is a 12-bit absolute reloc with the
2468   right 3 bitsassumed to be 0.
2469 ENUM
2470   BFD_RELOC_D30V_15_PCREL
2471 ENUMDOC
2472   This is a 12-bit pc-relative reloc with
2473   the right 3 bits assumed to be 0.
2474 ENUM
2475   BFD_RELOC_D30V_15_PCREL_R
2476 ENUMDOC
2477   This is a 12-bit pc-relative reloc with
2478   the right 3 bits assumed to be 0. Same
2479   as the previous reloc but on the right side
2480   of the container.
2481 ENUM
2482   BFD_RELOC_D30V_21
2483 ENUMDOC
2484   This is an 18-bit absolute reloc with
2485   the right 3 bits assumed to be 0.
2486 ENUM
2487   BFD_RELOC_D30V_21_PCREL
2488 ENUMDOC
2489   This is an 18-bit pc-relative reloc with
2490   the right 3 bits assumed to be 0.
2491 ENUM
2492   BFD_RELOC_D30V_21_PCREL_R
2493 ENUMDOC
2494   This is an 18-bit pc-relative reloc with
2495   the right 3 bits assumed to be 0. Same
2496   as the previous reloc but on the right side
2497   of the container.
2498 ENUM
2499   BFD_RELOC_D30V_32
2500 ENUMDOC
2501   This is a 32-bit absolute reloc.
2502 ENUM
2503   BFD_RELOC_D30V_32_PCREL
2504 ENUMDOC
2505   This is a 32-bit pc-relative reloc.
2506
2507 ENUM
2508   BFD_RELOC_M32R_24
2509 ENUMDOC
2510   Mitsubishi M32R relocs.
2511   This is a 24 bit absolute address.
2512 ENUM
2513   BFD_RELOC_M32R_10_PCREL
2514 ENUMDOC
2515   This is a 10-bit pc-relative reloc with the right 2 bits assumed to be 0.
2516 ENUM
2517   BFD_RELOC_M32R_18_PCREL
2518 ENUMDOC
2519   This is an 18-bit reloc with the right 2 bits assumed to be 0.
2520 ENUM
2521   BFD_RELOC_M32R_26_PCREL
2522 ENUMDOC
2523   This is a 26-bit reloc with the right 2 bits assumed to be 0.
2524 ENUM
2525   BFD_RELOC_M32R_HI16_ULO
2526 ENUMDOC
2527   This is a 16-bit reloc containing the high 16 bits of an address
2528   used when the lower 16 bits are treated as unsigned.
2529 ENUM
2530   BFD_RELOC_M32R_HI16_SLO
2531 ENUMDOC
2532   This is a 16-bit reloc containing the high 16 bits of an address
2533   used when the lower 16 bits are treated as signed.
2534 ENUM
2535   BFD_RELOC_M32R_LO16
2536 ENUMDOC
2537   This is a 16-bit reloc containing the lower 16 bits of an address.
2538 ENUM
2539   BFD_RELOC_M32R_SDA16
2540 ENUMDOC
2541   This is a 16-bit reloc containing the small data area offset for use in
2542   add3, load, and store instructions.
2543
2544 ENUM
2545   BFD_RELOC_V850_9_PCREL
2546 ENUMDOC
2547   This is a 9-bit reloc
2548 ENUM
2549   BFD_RELOC_V850_22_PCREL
2550 ENUMDOC
2551   This is a 22-bit reloc
2552
2553 ENUM
2554   BFD_RELOC_V850_SDA_16_16_OFFSET
2555 ENUMDOC
2556   This is a 16 bit offset from the short data area pointer.
2557 ENUM
2558   BFD_RELOC_V850_SDA_15_16_OFFSET
2559 ENUMDOC
2560   This is a 16 bit offset (of which only 15 bits are used) from the
2561   short data area pointer.
2562 ENUM
2563   BFD_RELOC_V850_ZDA_16_16_OFFSET
2564 ENUMDOC
2565   This is a 16 bit offset from the zero data area pointer.
2566 ENUM
2567   BFD_RELOC_V850_ZDA_15_16_OFFSET
2568 ENUMDOC
2569   This is a 16 bit offset (of which only 15 bits are used) from the
2570   zero data area pointer.
2571 ENUM
2572   BFD_RELOC_V850_TDA_6_8_OFFSET
2573 ENUMDOC
2574   This is an 8 bit offset (of which only 6 bits are used) from the
2575   tiny data area pointer.
2576 ENUM
2577   BFD_RELOC_V850_TDA_7_8_OFFSET
2578 ENUMDOC
2579   This is an 8bit offset (of which only 7 bits are used) from the tiny
2580   data area pointer.
2581 ENUM
2582   BFD_RELOC_V850_TDA_7_7_OFFSET
2583 ENUMDOC
2584   This is a 7 bit offset from the tiny data area pointer.
2585 ENUM
2586   BFD_RELOC_V850_TDA_16_16_OFFSET
2587 ENUMDOC
2588   This is a 16 bit offset from the tiny data area pointer.
2589 COMMENT
2590 ENUM
2591   BFD_RELOC_V850_TDA_4_5_OFFSET
2592 ENUMDOC
2593   This is a 5 bit offset (of which only 4 bits are used) from the tiny
2594   data area pointer.
2595 ENUM
2596   BFD_RELOC_V850_TDA_4_4_OFFSET
2597 ENUMDOC
2598   This is a 4 bit offset from the tiny data area pointer.
2599 ENUM
2600   BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET
2601 ENUMDOC
2602   This is a 16 bit offset from the short data area pointer, with the
2603   bits placed non-contigously in the instruction.
2604 ENUM
2605   BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET
2606 ENUMDOC
2607   This is a 16 bit offset from the zero data area pointer, with the
2608   bits placed non-contigously in the instruction.
2609 ENUM
2610   BFD_RELOC_V850_CALLT_6_7_OFFSET
2611 ENUMDOC
2612   This is a 6 bit offset from the call table base pointer.
2613 ENUM
2614   BFD_RELOC_V850_CALLT_16_16_OFFSET
2615 ENUMDOC
2616   This is a 16 bit offset from the call table base pointer.
2617 COMMENT
2618
2619 ENUM
2620   BFD_RELOC_MN10300_32_PCREL
2621 ENUMDOC
2622   This is a 32bit pcrel reloc for the mn10300, offset by two bytes in the
2623   instruction.
2624 ENUM
2625   BFD_RELOC_MN10300_16_PCREL
2626 ENUMDOC
2627   This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the
2628   instruction.
2629
2630 ENUM
2631   BFD_RELOC_TIC30_LDP
2632 ENUMDOC
2633   This is a 8bit DP reloc for the tms320c30, where the most
2634   significant 8 bits of a 24 bit word are placed into the least
2635   significant 8 bits of the opcode.
2636
2637 ENUM
2638   BFD_RELOC_TIC54X_PARTLS7
2639 ENUMDOC
2640   This is a 7bit reloc for the tms320c54x, where the least
2641   significant 7 bits of a 16 bit word are placed into the least
2642   significant 7 bits of the opcode.
2643
2644 ENUM
2645   BFD_RELOC_TIC54X_PARTMS9
2646 ENUMDOC
2647   This is a 9bit DP reloc for the tms320c54x, where the most
2648   significant 9 bits of a 16 bit word are placed into the least
2649   significant 9 bits of the opcode.
2650
2651 ENUM
2652   BFD_RELOC_TIC54X_23
2653 ENUMDOC
2654   This is an extended address 23-bit reloc for the tms320c54x.
2655
2656 ENUM
2657   BFD_RELOC_TIC54X_16_OF_23
2658 ENUMDOC
2659   This is a 16-bit reloc for the tms320c54x, where the least
2660   significant 16 bits of a 23-bit extended address are placed into
2661   the opcode.
2662
2663 ENUM
2664   BFD_RELOC_TIC54X_MS7_OF_23
2665 ENUMDOC
2666   This is a reloc for the tms320c54x, where the most
2667   significant 7 bits of a 23-bit extended address are placed into
2668   the opcode.
2669
2670 ENUM
2671   BFD_RELOC_FR30_48
2672 ENUMDOC
2673   This is a 48 bit reloc for the FR30 that stores 32 bits.
2674 ENUM
2675   BFD_RELOC_FR30_20
2676 ENUMDOC
2677   This is a 32 bit reloc for the FR30 that stores 20 bits split up into
2678   two sections.
2679 ENUM
2680   BFD_RELOC_FR30_6_IN_4
2681 ENUMDOC
2682   This is a 16 bit reloc for the FR30 that stores a 6 bit word offset in
2683   4 bits.
2684 ENUM
2685   BFD_RELOC_FR30_8_IN_8
2686 ENUMDOC
2687   This is a 16 bit reloc for the FR30 that stores an 8 bit byte offset
2688   into 8 bits.
2689 ENUM
2690   BFD_RELOC_FR30_9_IN_8
2691 ENUMDOC
2692   This is a 16 bit reloc for the FR30 that stores a 9 bit short offset
2693   into 8 bits.
2694 ENUM
2695   BFD_RELOC_FR30_10_IN_8
2696 ENUMDOC
2697   This is a 16 bit reloc for the FR30 that stores a 10 bit word offset
2698   into 8 bits.
2699 ENUM
2700   BFD_RELOC_FR30_9_PCREL
2701 ENUMDOC
2702   This is a 16 bit reloc for the FR30 that stores a 9 bit pc relative
2703   short offset into 8 bits.
2704 ENUM
2705   BFD_RELOC_FR30_12_PCREL
2706 ENUMDOC
2707   This is a 16 bit reloc for the FR30 that stores a 12 bit pc relative
2708   short offset into 11 bits.
2709
2710 ENUM
2711   BFD_RELOC_MCORE_PCREL_IMM8BY4
2712 ENUMX
2713   BFD_RELOC_MCORE_PCREL_IMM11BY2
2714 ENUMX
2715   BFD_RELOC_MCORE_PCREL_IMM4BY2
2716 ENUMX
2717   BFD_RELOC_MCORE_PCREL_32
2718 ENUMX
2719   BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2
2720 ENUMX
2721   BFD_RELOC_MCORE_RVA
2722 ENUMDOC
2723   Motorola Mcore relocations.
2724
2725 ENUM
2726   BFD_RELOC_MMIX_GETA
2727 ENUMX
2728   BFD_RELOC_MMIX_GETA_1
2729 ENUMX
2730   BFD_RELOC_MMIX_GETA_2
2731 ENUMX
2732   BFD_RELOC_MMIX_GETA_3
2733 ENUMDOC
2734   These are relocations for the GETA instruction.
2735 ENUM
2736   BFD_RELOC_MMIX_CBRANCH
2737 ENUMX
2738   BFD_RELOC_MMIX_CBRANCH_J
2739 ENUMX
2740   BFD_RELOC_MMIX_CBRANCH_1
2741 ENUMX
2742   BFD_RELOC_MMIX_CBRANCH_2
2743 ENUMX
2744   BFD_RELOC_MMIX_CBRANCH_3
2745 ENUMDOC
2746   These are relocations for a conditional branch instruction.
2747 ENUM
2748   BFD_RELOC_MMIX_PUSHJ
2749 ENUMX
2750   BFD_RELOC_MMIX_PUSHJ_1
2751 ENUMX
2752   BFD_RELOC_MMIX_PUSHJ_2
2753 ENUMX
2754   BFD_RELOC_MMIX_PUSHJ_3
2755 ENUMDOC
2756   These are relocations for the PUSHJ instruction.
2757 ENUM
2758   BFD_RELOC_MMIX_JMP
2759 ENUMX
2760   BFD_RELOC_MMIX_JMP_1
2761 ENUMX
2762   BFD_RELOC_MMIX_JMP_2
2763 ENUMX
2764   BFD_RELOC_MMIX_JMP_3
2765 ENUMDOC
2766   These are relocations for the JMP instruction.
2767 ENUM
2768   BFD_RELOC_MMIX_ADDR19
2769 ENUMDOC
2770   This is a relocation for a relative address as in a GETA instruction or
2771   a branch.
2772 ENUM
2773   BFD_RELOC_MMIX_ADDR27
2774 ENUMDOC
2775   This is a relocation for a relative address as in a JMP instruction.
2776 ENUM
2777   BFD_RELOC_MMIX_REG_OR_BYTE
2778 ENUMDOC
2779   This is a relocation for an instruction field that may be a general
2780   register or a value 0..255.
2781 ENUM
2782   BFD_RELOC_MMIX_REG
2783 ENUMDOC
2784   This is a relocation for an instruction field that may be a general
2785   register.
2786 ENUM
2787   BFD_RELOC_MMIX_BASE_PLUS_OFFSET
2788 ENUMDOC
2789   This is a relocation for two instruction fields holding a register and
2790   an offset, the equivalent of the relocation.
2791 ENUM
2792   BFD_RELOC_MMIX_LOCAL
2793 ENUMDOC
2794   This relocation is an assertion that the expression is not allocated as
2795   a global register.  It does not modify contents.
2796
2797 ENUM
2798   BFD_RELOC_AVR_7_PCREL
2799 ENUMDOC
2800   This is a 16 bit reloc for the AVR that stores 8 bit pc relative
2801   short offset into 7 bits.
2802 ENUM
2803   BFD_RELOC_AVR_13_PCREL
2804 ENUMDOC
2805   This is a 16 bit reloc for the AVR that stores 13 bit pc relative
2806   short offset into 12 bits.
2807 ENUM
2808   BFD_RELOC_AVR_16_PM
2809 ENUMDOC
2810   This is a 16 bit reloc for the AVR that stores 17 bit value (usually
2811   program memory address) into 16 bits.
2812 ENUM
2813   BFD_RELOC_AVR_LO8_LDI
2814 ENUMDOC
2815   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
2816   data memory address) into 8 bit immediate value of LDI insn.
2817 ENUM
2818   BFD_RELOC_AVR_HI8_LDI
2819 ENUMDOC
2820   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
2821   of data memory address) into 8 bit immediate value of LDI insn.
2822 ENUM
2823   BFD_RELOC_AVR_HH8_LDI
2824 ENUMDOC
2825   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
2826   of program memory address) into 8 bit immediate value of LDI insn.
2827 ENUM
2828   BFD_RELOC_AVR_LO8_LDI_NEG
2829 ENUMDOC
2830   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2831   (usually data memory address) into 8 bit immediate value of SUBI insn.
2832 ENUM
2833   BFD_RELOC_AVR_HI8_LDI_NEG
2834 ENUMDOC
2835   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2836   (high 8 bit of data memory address) into 8 bit immediate value of
2837   SUBI insn.
2838 ENUM
2839   BFD_RELOC_AVR_HH8_LDI_NEG
2840 ENUMDOC
2841   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2842   (most high 8 bit of program memory address) into 8 bit immediate value
2843   of LDI or SUBI insn.
2844 ENUM
2845   BFD_RELOC_AVR_LO8_LDI_PM
2846 ENUMDOC
2847   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
2848   command address) into 8 bit immediate value of LDI insn.
2849 ENUM
2850   BFD_RELOC_AVR_HI8_LDI_PM
2851 ENUMDOC
2852   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
2853   of command address) into 8 bit immediate value of LDI insn.
2854 ENUM
2855   BFD_RELOC_AVR_HH8_LDI_PM
2856 ENUMDOC
2857   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
2858   of command address) into 8 bit immediate value of LDI insn.
2859 ENUM
2860   BFD_RELOC_AVR_LO8_LDI_PM_NEG
2861 ENUMDOC
2862   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2863   (usually command address) into 8 bit immediate value of SUBI insn.
2864 ENUM
2865   BFD_RELOC_AVR_HI8_LDI_PM_NEG
2866 ENUMDOC
2867   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2868   (high 8 bit of 16 bit command address) into 8 bit immediate value
2869   of SUBI insn.
2870 ENUM
2871   BFD_RELOC_AVR_HH8_LDI_PM_NEG
2872 ENUMDOC
2873   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2874   (high 6 bit of 22 bit command address) into 8 bit immediate
2875   value of SUBI insn.
2876 ENUM
2877   BFD_RELOC_AVR_CALL
2878 ENUMDOC
2879   This is a 32 bit reloc for the AVR that stores 23 bit value
2880   into 22 bits.
2881
2882 ENUM
2883   BFD_RELOC_390_12
2884 ENUMDOC
2885    Direct 12 bit.
2886 ENUM
2887   BFD_RELOC_390_GOT12
2888 ENUMDOC
2889   12 bit GOT offset.
2890 ENUM
2891   BFD_RELOC_390_PLT32
2892 ENUMDOC
2893   32 bit PC relative PLT address.
2894 ENUM
2895   BFD_RELOC_390_COPY
2896 ENUMDOC
2897   Copy symbol at runtime.
2898 ENUM
2899   BFD_RELOC_390_GLOB_DAT
2900 ENUMDOC
2901   Create GOT entry.
2902 ENUM
2903   BFD_RELOC_390_JMP_SLOT
2904 ENUMDOC
2905   Create PLT entry.
2906 ENUM
2907   BFD_RELOC_390_RELATIVE
2908 ENUMDOC
2909   Adjust by program base.
2910 ENUM
2911   BFD_RELOC_390_GOTPC
2912 ENUMDOC
2913   32 bit PC relative offset to GOT.
2914 ENUM
2915   BFD_RELOC_390_GOT16
2916 ENUMDOC
2917   16 bit GOT offset.
2918 ENUM
2919   BFD_RELOC_390_PC16DBL
2920 ENUMDOC
2921   PC relative 16 bit shifted by 1.
2922 ENUM
2923   BFD_RELOC_390_PLT16DBL
2924 ENUMDOC
2925   16 bit PC rel. PLT shifted by 1.
2926 ENUM
2927   BFD_RELOC_390_PC32DBL
2928 ENUMDOC
2929   PC relative 32 bit shifted by 1.
2930 ENUM
2931   BFD_RELOC_390_PLT32DBL
2932 ENUMDOC
2933   32 bit PC rel. PLT shifted by 1.
2934 ENUM
2935   BFD_RELOC_390_GOTPCDBL
2936 ENUMDOC
2937   32 bit PC rel. GOT shifted by 1.
2938 ENUM
2939   BFD_RELOC_390_GOT64
2940 ENUMDOC
2941   64 bit GOT offset.
2942 ENUM
2943   BFD_RELOC_390_PLT64
2944 ENUMDOC
2945   64 bit PC relative PLT address.
2946 ENUM
2947   BFD_RELOC_390_GOTENT
2948 ENUMDOC
2949   32 bit rel. offset to GOT entry.
2950
2951 ENUM
2952   BFD_RELOC_VTABLE_INHERIT
2953 ENUMX
2954   BFD_RELOC_VTABLE_ENTRY
2955 ENUMDOC
2956   These two relocations are used by the linker to determine which of
2957   the entries in a C++ virtual function table are actually used.  When
2958   the --gc-sections option is given, the linker will zero out the entries
2959   that are not used, so that the code for those functions need not be
2960   included in the output.
2961
2962   VTABLE_INHERIT is a zero-space relocation used to describe to the
2963   linker the inheritence tree of a C++ virtual function table.  The
2964   relocation's symbol should be the parent class' vtable, and the
2965   relocation should be located at the child vtable.
2966
2967   VTABLE_ENTRY is a zero-space relocation that describes the use of a
2968   virtual function table entry.  The reloc's symbol should refer to the
2969   table of the class mentioned in the code.  Off of that base, an offset
2970   describes the entry that is being used.  For Rela hosts, this offset
2971   is stored in the reloc's addend.  For Rel hosts, we are forced to put
2972   this offset in the reloc's section offset.
2973
2974 ENUM
2975   BFD_RELOC_IA64_IMM14
2976 ENUMX
2977   BFD_RELOC_IA64_IMM22
2978 ENUMX
2979   BFD_RELOC_IA64_IMM64
2980 ENUMX
2981   BFD_RELOC_IA64_DIR32MSB
2982 ENUMX
2983   BFD_RELOC_IA64_DIR32LSB
2984 ENUMX
2985   BFD_RELOC_IA64_DIR64MSB
2986 ENUMX
2987   BFD_RELOC_IA64_DIR64LSB
2988 ENUMX
2989   BFD_RELOC_IA64_GPREL22
2990 ENUMX
2991   BFD_RELOC_IA64_GPREL64I
2992 ENUMX
2993   BFD_RELOC_IA64_GPREL32MSB
2994 ENUMX
2995   BFD_RELOC_IA64_GPREL32LSB
2996 ENUMX
2997   BFD_RELOC_IA64_GPREL64MSB
2998 ENUMX
2999   BFD_RELOC_IA64_GPREL64LSB
3000 ENUMX
3001   BFD_RELOC_IA64_LTOFF22
3002 ENUMX
3003   BFD_RELOC_IA64_LTOFF64I
3004 ENUMX
3005   BFD_RELOC_IA64_PLTOFF22
3006 ENUMX
3007   BFD_RELOC_IA64_PLTOFF64I
3008 ENUMX
3009   BFD_RELOC_IA64_PLTOFF64MSB
3010 ENUMX
3011   BFD_RELOC_IA64_PLTOFF64LSB
3012 ENUMX
3013   BFD_RELOC_IA64_FPTR64I
3014 ENUMX
3015   BFD_RELOC_IA64_FPTR32MSB
3016 ENUMX
3017   BFD_RELOC_IA64_FPTR32LSB
3018 ENUMX
3019   BFD_RELOC_IA64_FPTR64MSB
3020 ENUMX
3021   BFD_RELOC_IA64_FPTR64LSB
3022 ENUMX
3023   BFD_RELOC_IA64_PCREL21B
3024 ENUMX
3025   BFD_RELOC_IA64_PCREL21BI
3026 ENUMX
3027   BFD_RELOC_IA64_PCREL21M
3028 ENUMX
3029   BFD_RELOC_IA64_PCREL21F
3030 ENUMX
3031   BFD_RELOC_IA64_PCREL22
3032 ENUMX
3033   BFD_RELOC_IA64_PCREL60B
3034 ENUMX
3035   BFD_RELOC_IA64_PCREL64I
3036 ENUMX
3037   BFD_RELOC_IA64_PCREL32MSB
3038 ENUMX
3039   BFD_RELOC_IA64_PCREL32LSB
3040 ENUMX
3041   BFD_RELOC_IA64_PCREL64MSB
3042 ENUMX
3043   BFD_RELOC_IA64_PCREL64LSB
3044 ENUMX
3045   BFD_RELOC_IA64_LTOFF_FPTR22
3046 ENUMX
3047   BFD_RELOC_IA64_LTOFF_FPTR64I
3048 ENUMX
3049   BFD_RELOC_IA64_LTOFF_FPTR32MSB
3050 ENUMX
3051   BFD_RELOC_IA64_LTOFF_FPTR32LSB
3052 ENUMX
3053   BFD_RELOC_IA64_LTOFF_FPTR64MSB
3054 ENUMX
3055   BFD_RELOC_IA64_LTOFF_FPTR64LSB
3056 ENUMX
3057   BFD_RELOC_IA64_SEGREL32MSB
3058 ENUMX
3059   BFD_RELOC_IA64_SEGREL32LSB
3060 ENUMX
3061   BFD_RELOC_IA64_SEGREL64MSB
3062 ENUMX
3063   BFD_RELOC_IA64_SEGREL64LSB
3064 ENUMX
3065   BFD_RELOC_IA64_SECREL32MSB
3066 ENUMX
3067   BFD_RELOC_IA64_SECREL32LSB
3068 ENUMX
3069   BFD_RELOC_IA64_SECREL64MSB
3070 ENUMX
3071   BFD_RELOC_IA64_SECREL64LSB
3072 ENUMX
3073   BFD_RELOC_IA64_REL32MSB
3074 ENUMX
3075   BFD_RELOC_IA64_REL32LSB
3076 ENUMX
3077   BFD_RELOC_IA64_REL64MSB
3078 ENUMX
3079   BFD_RELOC_IA64_REL64LSB
3080 ENUMX
3081   BFD_RELOC_IA64_LTV32MSB
3082 ENUMX
3083   BFD_RELOC_IA64_LTV32LSB
3084 ENUMX
3085   BFD_RELOC_IA64_LTV64MSB
3086 ENUMX
3087   BFD_RELOC_IA64_LTV64LSB
3088 ENUMX
3089   BFD_RELOC_IA64_IPLTMSB
3090 ENUMX
3091   BFD_RELOC_IA64_IPLTLSB
3092 ENUMX
3093   BFD_RELOC_IA64_COPY
3094 ENUMX
3095   BFD_RELOC_IA64_TPREL22
3096 ENUMX
3097   BFD_RELOC_IA64_TPREL64MSB
3098 ENUMX
3099   BFD_RELOC_IA64_TPREL64LSB
3100 ENUMX
3101   BFD_RELOC_IA64_LTOFF_TP22
3102 ENUMX
3103   BFD_RELOC_IA64_LTOFF22X
3104 ENUMX
3105   BFD_RELOC_IA64_LDXMOV
3106 ENUMDOC
3107   Intel IA64 Relocations.
3108
3109 ENUM
3110   BFD_RELOC_M68HC11_HI8
3111 ENUMDOC
3112   Motorola 68HC11 reloc.
3113   This is the 8 bits high part of an absolute address.
3114 ENUM
3115   BFD_RELOC_M68HC11_LO8
3116 ENUMDOC
3117   Motorola 68HC11 reloc.
3118   This is the 8 bits low part of an absolute address.
3119 ENUM
3120   BFD_RELOC_M68HC11_3B
3121 ENUMDOC
3122   Motorola 68HC11 reloc.
3123   This is the 3 bits of a value.
3124
3125 ENUM
3126   BFD_RELOC_CRIS_BDISP8
3127 ENUMX
3128   BFD_RELOC_CRIS_UNSIGNED_5
3129 ENUMX
3130   BFD_RELOC_CRIS_SIGNED_6
3131 ENUMX
3132   BFD_RELOC_CRIS_UNSIGNED_6
3133 ENUMX
3134   BFD_RELOC_CRIS_UNSIGNED_4
3135 ENUMDOC
3136   These relocs are only used within the CRIS assembler.  They are not
3137   (at present) written to any object files.
3138 ENUM
3139   BFD_RELOC_CRIS_COPY
3140 ENUMX
3141   BFD_RELOC_CRIS_GLOB_DAT
3142 ENUMX
3143   BFD_RELOC_CRIS_JUMP_SLOT
3144 ENUMX
3145   BFD_RELOC_CRIS_RELATIVE
3146 ENUMDOC
3147   Relocs used in ELF shared libraries for CRIS.
3148 ENUM
3149   BFD_RELOC_CRIS_32_GOT
3150 ENUMDOC
3151   32-bit offset to symbol-entry within GOT.
3152 ENUM
3153   BFD_RELOC_CRIS_16_GOT
3154 ENUMDOC
3155   16-bit offset to symbol-entry within GOT.
3156 ENUM
3157   BFD_RELOC_CRIS_32_GOTPLT
3158 ENUMDOC
3159   32-bit offset to symbol-entry within GOT, with PLT handling.
3160 ENUM
3161   BFD_RELOC_CRIS_16_GOTPLT
3162 ENUMDOC
3163   16-bit offset to symbol-entry within GOT, with PLT handling.
3164 ENUM
3165   BFD_RELOC_CRIS_32_GOTREL
3166 ENUMDOC
3167   32-bit offset to symbol, relative to GOT.
3168 ENUM
3169   BFD_RELOC_CRIS_32_PLT_GOTREL
3170 ENUMDOC
3171   32-bit offset to symbol with PLT entry, relative to GOT.
3172 ENUM
3173   BFD_RELOC_CRIS_32_PLT_PCREL
3174 ENUMDOC
3175   32-bit offset to symbol with PLT entry, relative to this relocation.
3176
3177 ENUM
3178   BFD_RELOC_860_COPY
3179 ENUMX
3180   BFD_RELOC_860_GLOB_DAT
3181 ENUMX
3182   BFD_RELOC_860_JUMP_SLOT
3183 ENUMX
3184   BFD_RELOC_860_RELATIVE
3185 ENUMX
3186   BFD_RELOC_860_PC26
3187 ENUMX
3188   BFD_RELOC_860_PLT26
3189 ENUMX
3190   BFD_RELOC_860_PC16
3191 ENUMX
3192   BFD_RELOC_860_LOW0
3193 ENUMX
3194   BFD_RELOC_860_SPLIT0
3195 ENUMX
3196   BFD_RELOC_860_LOW1
3197 ENUMX
3198   BFD_RELOC_860_SPLIT1
3199 ENUMX
3200   BFD_RELOC_860_LOW2
3201 ENUMX
3202   BFD_RELOC_860_SPLIT2
3203 ENUMX
3204   BFD_RELOC_860_LOW3
3205 ENUMX
3206   BFD_RELOC_860_LOGOT0
3207 ENUMX
3208   BFD_RELOC_860_SPGOT0
3209 ENUMX
3210   BFD_RELOC_860_LOGOT1
3211 ENUMX
3212   BFD_RELOC_860_SPGOT1
3213 ENUMX
3214   BFD_RELOC_860_LOGOTOFF0
3215 ENUMX
3216   BFD_RELOC_860_SPGOTOFF0
3217 ENUMX
3218   BFD_RELOC_860_LOGOTOFF1
3219 ENUMX
3220   BFD_RELOC_860_SPGOTOFF1
3221 ENUMX
3222   BFD_RELOC_860_LOGOTOFF2
3223 ENUMX
3224   BFD_RELOC_860_LOGOTOFF3
3225 ENUMX
3226   BFD_RELOC_860_LOPC
3227 ENUMX
3228   BFD_RELOC_860_HIGHADJ
3229 ENUMX
3230   BFD_RELOC_860_HAGOT
3231 ENUMX
3232   BFD_RELOC_860_HAGOTOFF
3233 ENUMX
3234   BFD_RELOC_860_HAPC
3235 ENUMX
3236   BFD_RELOC_860_HIGH
3237 ENUMX
3238   BFD_RELOC_860_HIGOT
3239 ENUMX
3240   BFD_RELOC_860_HIGOTOFF
3241 ENUMDOC
3242   Intel i860 Relocations.
3243
3244 ENUM
3245   BFD_RELOC_OPENRISC_ABS_26
3246 ENUMX
3247   BFD_RELOC_OPENRISC_REL_26
3248 ENUMDOC
3249   OpenRISC Relocations.
3250
3251 ENUM
3252   BFD_RELOC_H8_DIR16A8
3253 ENUMX
3254   BFD_RELOC_H8_DIR16R8
3255 ENUMX
3256   BFD_RELOC_H8_DIR24A8
3257 ENUMX
3258   BFD_RELOC_H8_DIR24R8
3259 ENUMX
3260   BFD_RELOC_H8_DIR32A16
3261 ENUMDOC
3262   H8 elf Relocations.
3263
3264 ENDSENUM
3265   BFD_RELOC_UNUSED
3266 CODE_FRAGMENT
3267 .
3268 .typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
3269 */
3270
3271 /*
3272 FUNCTION
3273         bfd_reloc_type_lookup
3274
3275 SYNOPSIS
3276         reloc_howto_type *
3277         bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);
3278
3279 DESCRIPTION
3280         Return a pointer to a howto structure which, when
3281         invoked, will perform the relocation @var{code} on data from the
3282         architecture noted.
3283
3284 */
3285
3286 reloc_howto_type *
3287 bfd_reloc_type_lookup (abfd, code)
3288      bfd *abfd;
3289      bfd_reloc_code_real_type code;
3290 {
3291   return BFD_SEND (abfd, reloc_type_lookup, (abfd, code));
3292 }
3293
3294 static reloc_howto_type bfd_howto_32 =
3295 HOWTO (0, 00, 2, 32, false, 0, complain_overflow_bitfield, 0, "VRT32", false, 0xffffffff, 0xffffffff, true);
3296
3297 /*
3298 INTERNAL_FUNCTION
3299         bfd_default_reloc_type_lookup
3300
3301 SYNOPSIS
3302         reloc_howto_type *bfd_default_reloc_type_lookup
3303         (bfd *abfd, bfd_reloc_code_real_type  code);
3304
3305 DESCRIPTION
3306         Provides a default relocation lookup routine for any architecture.
3307
3308 */
3309
3310 reloc_howto_type *
3311 bfd_default_reloc_type_lookup (abfd, code)
3312      bfd *abfd;
3313      bfd_reloc_code_real_type code;
3314 {
3315   switch (code)
3316     {
3317     case BFD_RELOC_CTOR:
3318       /* The type of reloc used in a ctor, which will be as wide as the
3319          address - so either a 64, 32, or 16 bitter.  */
3320       switch (bfd_get_arch_info (abfd)->bits_per_address)
3321         {
3322         case 64:
3323           BFD_FAIL ();
3324         case 32:
3325           return &bfd_howto_32;
3326         case 16:
3327           BFD_FAIL ();
3328         default:
3329           BFD_FAIL ();
3330         }
3331     default:
3332       BFD_FAIL ();
3333     }
3334   return (reloc_howto_type *) NULL;
3335 }
3336
3337 /*
3338 FUNCTION
3339         bfd_get_reloc_code_name
3340
3341 SYNOPSIS
3342         const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code);
3343
3344 DESCRIPTION
3345         Provides a printable name for the supplied relocation code.
3346         Useful mainly for printing error messages.
3347 */
3348
3349 const char *
3350 bfd_get_reloc_code_name (code)
3351      bfd_reloc_code_real_type code;
3352 {
3353   if (code > BFD_RELOC_UNUSED)
3354     return 0;
3355   return bfd_reloc_code_real_names[(int)code];
3356 }
3357
3358 /*
3359 INTERNAL_FUNCTION
3360         bfd_generic_relax_section
3361
3362 SYNOPSIS
3363         boolean bfd_generic_relax_section
3364          (bfd *abfd,
3365           asection *section,
3366           struct bfd_link_info *,
3367           boolean *);
3368
3369 DESCRIPTION
3370         Provides default handling for relaxing for back ends which
3371         don't do relaxing -- i.e., does nothing.
3372 */
3373
3374 /*ARGSUSED*/
3375 boolean
3376 bfd_generic_relax_section (abfd, section, link_info, again)
3377      bfd *abfd ATTRIBUTE_UNUSED;
3378      asection *section ATTRIBUTE_UNUSED;
3379      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3380      boolean *again;
3381 {
3382   *again = false;
3383   return true;
3384 }
3385
3386 /*
3387 INTERNAL_FUNCTION
3388         bfd_generic_gc_sections
3389
3390 SYNOPSIS
3391         boolean bfd_generic_gc_sections
3392          (bfd *, struct bfd_link_info *);
3393
3394 DESCRIPTION
3395         Provides default handling for relaxing for back ends which
3396         don't do section gc -- i.e., does nothing.
3397 */
3398
3399 /*ARGSUSED*/
3400 boolean
3401 bfd_generic_gc_sections (abfd, link_info)
3402      bfd *abfd ATTRIBUTE_UNUSED;
3403      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3404 {
3405   return true;
3406 }
3407
3408 /*
3409 INTERNAL_FUNCTION
3410         bfd_generic_merge_sections
3411
3412 SYNOPSIS
3413         boolean bfd_generic_merge_sections
3414          (bfd *, struct bfd_link_info *);
3415
3416 DESCRIPTION
3417         Provides default handling for SEC_MERGE section merging for back ends
3418         which don't have SEC_MERGE support -- i.e., does nothing.
3419 */
3420
3421 /*ARGSUSED*/
3422 boolean
3423 bfd_generic_merge_sections (abfd, link_info)
3424      bfd *abfd ATTRIBUTE_UNUSED;
3425      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3426 {
3427   return true;
3428 }
3429
3430 /*
3431 INTERNAL_FUNCTION
3432         bfd_generic_get_relocated_section_contents
3433
3434 SYNOPSIS
3435         bfd_byte *
3436            bfd_generic_get_relocated_section_contents (bfd *abfd,
3437              struct bfd_link_info *link_info,
3438              struct bfd_link_order *link_order,
3439              bfd_byte *data,
3440              boolean relocateable,
3441              asymbol **symbols);
3442
3443 DESCRIPTION
3444         Provides default handling of relocation effort for back ends
3445         which can't be bothered to do it efficiently.
3446
3447 */
3448
3449 bfd_byte *
3450 bfd_generic_get_relocated_section_contents (abfd, link_info, link_order, data,
3451                                             relocateable, symbols)
3452      bfd *abfd;
3453      struct bfd_link_info *link_info;
3454      struct bfd_link_order *link_order;
3455      bfd_byte *data;
3456      boolean relocateable;
3457      asymbol **symbols;
3458 {
3459   /* Get enough memory to hold the stuff */
3460   bfd *input_bfd = link_order->u.indirect.section->owner;
3461   asection *input_section = link_order->u.indirect.section;
3462
3463   long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
3464   arelent **reloc_vector = NULL;
3465   long reloc_count;
3466
3467   if (reloc_size < 0)
3468     goto error_return;
3469
3470   reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
3471   if (reloc_vector == NULL && reloc_size != 0)
3472     goto error_return;
3473
3474   /* read in the section */
3475   if (!bfd_get_section_contents (input_bfd,
3476                                  input_section,
3477                                  (PTR) data,
3478                                  (bfd_vma) 0,
3479                                  input_section->_raw_size))
3480     goto error_return;
3481
3482   /* We're not relaxing the section, so just copy the size info */
3483   input_section->_cooked_size = input_section->_raw_size;
3484   input_section->reloc_done = true;
3485
3486   reloc_count = bfd_canonicalize_reloc (input_bfd,
3487                                         input_section,
3488                                         reloc_vector,
3489                                         symbols);
3490   if (reloc_count < 0)
3491     goto error_return;
3492
3493   if (reloc_count > 0)
3494     {
3495       arelent **parent;
3496       for (parent = reloc_vector; *parent != (arelent *) NULL;
3497            parent++)
3498         {
3499           char *error_message = (char *) NULL;
3500           bfd_reloc_status_type r =
3501             bfd_perform_relocation (input_bfd,
3502                                     *parent,
3503                                     (PTR) data,
3504                                     input_section,
3505                                     relocateable ? abfd : (bfd *) NULL,
3506                                     &error_message);
3507
3508           if (relocateable)
3509             {
3510               asection *os = input_section->output_section;
3511
3512               /* A partial link, so keep the relocs */
3513               os->orelocation[os->reloc_count] = *parent;
3514               os->reloc_count++;
3515             }
3516
3517           if (r != bfd_reloc_ok)
3518             {
3519               switch (r)
3520                 {
3521                 case bfd_reloc_undefined:
3522                   if (!((*link_info->callbacks->undefined_symbol)
3523                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3524                          input_bfd, input_section, (*parent)->address,
3525                          true)))
3526                     goto error_return;
3527                   break;
3528                 case bfd_reloc_dangerous:
3529                   BFD_ASSERT (error_message != (char *) NULL);
3530                   if (!((*link_info->callbacks->reloc_dangerous)
3531                         (link_info, error_message, input_bfd, input_section,
3532                          (*parent)->address)))
3533                     goto error_return;
3534                   break;
3535                 case bfd_reloc_overflow:
3536                   if (!((*link_info->callbacks->reloc_overflow)
3537                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3538                          (*parent)->howto->name, (*parent)->addend,
3539                          input_bfd, input_section, (*parent)->address)))
3540                     goto error_return;
3541                   break;
3542                 case bfd_reloc_outofrange:
3543                 default:
3544                   abort ();
3545                   break;
3546                 }
3547
3548             }
3549         }
3550     }
3551   if (reloc_vector != NULL)
3552     free (reloc_vector);
3553   return data;
3554
3555 error_return:
3556   if (reloc_vector != NULL)
3557     free (reloc_vector);
3558   return NULL;
3559 }