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, 2002
   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 .}
 113 .arelent;
 114 .
 115 */
 116
 117 /*
 118 DESCRIPTION
 119
 120         Here is a description of each of the fields within an <<arelent>>:
 121
 122         o <<sym_ptr_ptr>>
 123
 124         The symbol table pointer points to a pointer to the symbol
 125         associated with the relocation request.  It is
 126         the pointer into the table returned by the back end's
 127         <<get_symtab>> action. @xref{Symbols}. The symbol is referenced
 128         through a pointer to a pointer so that tools like the linker
 129         can fix up all the symbols of the same name by modifying only
 130         one pointer. The relocation routine looks in the symbol and
 131         uses the base of the section the symbol is attached to and the
 132         value of the symbol as the initial relocation offset. If the
 133         symbol pointer is zero, then the section provided is looked up.
 134
 135         o <<address>>
 136
 137         The <<address>> field gives the offset in bytes from the base of
 138         the section data which owns the relocation record to the first
 139         byte of relocatable information. The actual data relocated
 140         will be relative to this point; for example, a relocation
 141         type which modifies the bottom two bytes of a four byte word
 142         would not touch the first byte pointed to in a big endian
 143         world.
 144
 145         o <<addend>>
 146
 147         The <<addend>> is a value provided by the back end to be added (!)
 148         to the relocation offset. Its interpretation is dependent upon
 149         the howto. For example, on the 68k the code:
 150
 151 |        char foo[];
 152 |        main()
 153 |                {
 154 |                return foo[0x12345678];
 155 |                }
 156
 157         Could be compiled into:
 158
 159 |        linkw fp,#-4
 160 |        moveb @@#12345678,d0
 161 |        extbl d0
 162 |        unlk fp
 163 |        rts
 164
 165         This could create a reloc pointing to <<foo>>, but leave the
 166         offset in the data, something like:
 167
 168 |RELOCATION RECORDS FOR [.text]:
 169 |offset   type      value
 170 |00000006 32        _foo
 171 |
 172 |00000000 4e56 fffc          ; linkw fp,#-4
 173 |00000004 1039 1234 5678     ; moveb @@#12345678,d0
 174 |0000000a 49c0               ; extbl d0
 175 |0000000c 4e5e               ; unlk fp
 176 |0000000e 4e75               ; rts
 177
 178         Using coff and an 88k, some instructions don't have enough
 179         space in them to represent the full address range, and
 180         pointers have to be loaded in two parts. So you'd get something like:
 181
 182 |        or.u     r13,r0,hi16(_foo+0x12345678)
 183 |        ld.b     r2,r13,lo16(_foo+0x12345678)
 184 |        jmp      r1
 185
 186         This should create two relocs, both pointing to <<_foo>>, and with
 187         0x12340000 in their addend field. The data would consist of:
 188
 189 |RELOCATION RECORDS FOR [.text]:
 190 |offset   type      value
 191 |00000002 HVRT16    _foo+0x12340000
 192 |00000006 LVRT16    _foo+0x12340000
 193 |
 194 |00000000 5da05678           ; or.u r13,r0,0x5678
 195 |00000004 1c4d5678           ; ld.b r2,r13,0x5678
 196 |00000008 f400c001           ; jmp r1
 197
 198         The relocation routine digs out the value from the data, adds
 199         it to the addend to get the original offset, and then adds the
 200         value of <<_foo>>. Note that all 32 bits have to be kept around
 201         somewhere, to cope with carry from bit 15 to bit 16.
 202
 203         One further example is the sparc and the a.out format. The
 204         sparc has a similar problem to the 88k, in that some
 205         instructions don't have room for an entire offset, but on the
 206         sparc the parts are created in odd sized lumps. The designers of
 207         the a.out format chose to not use the data within the section
 208         for storing part of the offset; all the offset is kept within
 209         the reloc. Anything in the data should be ignored.
 210
 211 |        save %sp,-112,%sp
 212 |        sethi %hi(_foo+0x12345678),%g2
 213 |        ldsb [%g2+%lo(_foo+0x12345678)],%i0
 214 |        ret
 215 |        restore
 216
 217         Both relocs contain a pointer to <<foo>>, and the offsets
 218         contain junk.
 219
 220 |RELOCATION RECORDS FOR [.text]:
 221 |offset   type      value
 222 |00000004 HI22      _foo+0x12345678
 223 |00000008 LO10      _foo+0x12345678
 224 |
 225 |00000000 9de3bf90     ; save %sp,-112,%sp
 226 |00000004 05000000     ; sethi %hi(_foo+0),%g2
 227 |00000008 f048a000     ; ldsb [%g2+%lo(_foo+0)],%i0
 228 |0000000c 81c7e008     ; ret
 229 |00000010 81e80000     ; restore
 230
 231         o <<howto>>
 232
 233         The <<howto>> field can be imagined as a
 234         relocation instruction. It is a pointer to a structure which
 235         contains information on what to do with all of the other
 236         information in the reloc record and data section. A back end
 237         would normally have a relocation instruction set and turn
 238         relocations into pointers to the correct structure on input -
 239         but it would be possible to create each howto field on demand.
 240
 241 */
 242
 243 /*
 244 SUBSUBSECTION
 245         <<enum complain_overflow>>
 246
 247         Indicates what sort of overflow checking should be done when
 248         performing a relocation.
 249
 250 CODE_FRAGMENT
 251 .
 252 .enum complain_overflow
 253 .{
 254 .  {* Do not complain on overflow.  *}
 255 .  complain_overflow_dont,
 256 .
 257 .  {* Complain if the bitfield overflows, whether it is considered
 258 .     as signed or unsigned.  *}
 259 .  complain_overflow_bitfield,
 260 .
 261 .  {* Complain if the value overflows when considered as signed
 262 .     number.  *}
 263 .  complain_overflow_signed,
 264 .
 265 .  {* Complain if the value overflows when considered as an
 266 .     unsigned number.  *}
 267 .  complain_overflow_unsigned
 268 .};
 269
 270 */
 271
 272 /*
 273 SUBSUBSECTION
 274         <<reloc_howto_type>>
 275
 276         The <<reloc_howto_type>> is a structure which contains all the
 277         information that libbfd needs to know to tie up a back end's data.
 278
 279 CODE_FRAGMENT
 280 .struct symbol_cache_entry;             {* Forward declaration.  *}
 281 .
 282 .struct reloc_howto_struct
 283 .{
 284 .  {*  The type field has mainly a documentary use - the back end can
 285 .      do what it wants with it, though normally the back end's
 286 .      external idea of what a reloc number is stored
 287 .      in this field.  For example, a PC relative word relocation
 288 .      in a coff environment has the type 023 - because that's
 289 .      what the outside world calls a R_PCRWORD reloc.  *}
 290 .  unsigned int type;
 291 .
 292 .  {*  The value the final relocation is shifted right by.  This drops
 293 .      unwanted data from the relocation.  *}
 294 .  unsigned int rightshift;
 295 .
 296 .  {*  The size of the item to be relocated.  This is *not* a
 297 .      power-of-two measure.  To get the number of bytes operated
 298 .      on by a type of relocation, use bfd_get_reloc_size.  *}
 299 .  int size;
 300 .
 301 .  {*  The number of bits in the item to be relocated.  This is used
 302 .      when doing overflow checking.  *}
 303 .  unsigned int bitsize;
 304 .
 305 .  {*  Notes that the relocation is relative to the location in the
 306 .      data section of the addend.  The relocation function will
 307 .      subtract from the relocation value the address of the location
 308 .      being relocated.  *}
 309 .  boolean pc_relative;
 310 .
 311 .  {*  The bit position of the reloc value in the destination.
 312 .      The relocated value is left shifted by this amount.  *}
 313 .  unsigned int bitpos;
 314 .
 315 .  {* What type of overflow error should be checked for when
 316 .     relocating.  *}
 317 .  enum complain_overflow complain_on_overflow;
 318 .
 319 .  {* If this field is non null, then the supplied function is
 320 .     called rather than the normal function.  This allows really
 321 .     strange relocation methods to be accomodated (e.g., i960 callj
 322 .     instructions).  *}
 323 .  bfd_reloc_status_type (*special_function)
 324 .    PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR, asection *,
 325 .             bfd *, char **));
 326 .
 327 .  {* The textual name of the relocation type.  *}
 328 .  char *name;
 329 .
 330 .  {* Some formats record a relocation addend in the section contents
 331 .     rather than with the relocation.  For ELF formats this is the
 332 .     distinction between USE_REL and USE_RELA (though the code checks
 333 .     for USE_REL == 1/0).  The value of this field is TRUE if the
 334 .     addend is recorded with the section contents; when performing a
 335 .     partial link (ld -r) the section contents (the data) will be
 336 .     modified.  The value of this field is FALSE if addends are
 337 .     recorded with the relocation (in arelent.addend); when performing
 338 .     a partial link the relocation will be modified.
 339 .     All relocations for all ELF USE_RELA targets should set this field
 340 .     to FALSE (values of TRUE should be looked on with suspicion).
 341 .     However, the converse is not true: not all relocations of all ELF
 342 .     USE_REL targets set this field to TRUE.  Why this is so is peculiar
 343 .     to each particular target.  For relocs that aren't used in partial
 344 .     links (e.g. GOT stuff) it doesn't matter what this is set to.  *}
 345 .  boolean partial_inplace;
 346 .
 347 .  {* The src_mask selects which parts of the read in data
 348 .     are to be used in the relocation sum.  E.g., if this was an 8 bit
 349 .     byte of data which we read and relocated, this would be
 350 .     0x000000ff.  When we have relocs which have an addend, such as
 351 .     sun4 extended relocs, the value in the offset part of a
 352 .     relocating field is garbage so we never use it.  In this case
 353 .     the mask would be 0x00000000.  *}
 354 .  bfd_vma src_mask;
 355 .
 356 .  {* The dst_mask selects which parts of the instruction are replaced
 357 .     into the instruction.  In most cases src_mask == dst_mask,
 358 .     except in the above special case, where dst_mask would be
 359 .     0x000000ff, and src_mask would be 0x00000000.  *}
 360 .  bfd_vma dst_mask;
 361 .
 362 .  {* When some formats create PC relative instructions, they leave
 363 .     the value of the pc of the place being relocated in the offset
 364 .     slot of the instruction, so that a PC relative relocation can
 365 .     be made just by adding in an ordinary offset (e.g., sun3 a.out).
 366 .     Some formats leave the displacement part of an instruction
 367 .     empty (e.g., m88k bcs); this flag signals the fact.  *}
 368 .  boolean pcrel_offset;
 369 .};
 370 .
 371 */
 372
 373 /*
 374 FUNCTION
 375         The HOWTO Macro
 376
 377 DESCRIPTION
 378         The HOWTO define is horrible and will go away.
 379
 380 .#define HOWTO(C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
 381 .  { (unsigned) C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC }
 382
 383 DESCRIPTION
 384         And will be replaced with the totally magic way. But for the
 385         moment, we are compatible, so do it this way.
 386
 387 .#define NEWHOWTO(FUNCTION, NAME, SIZE, REL, IN) \
 388 .  HOWTO (0, 0, SIZE, 0, REL, 0, complain_overflow_dont, FUNCTION, \
 389 .         NAME, false, 0, 0, IN)
 390 .
 391
 392 DESCRIPTION
 393         This is used to fill in an empty howto entry in an array.
 394
 395 .#define EMPTY_HOWTO(C) \
 396 .  HOWTO ((C), 0, 0, 0, false, 0, complain_overflow_dont, NULL, \
 397 .         NULL, false, 0, 0, false)
 398 .
 399
 400 DESCRIPTION
 401         Helper routine to turn a symbol into a relocation value.
 402
 403 .#define HOWTO_PREPARE(relocation, symbol)               \
 404 .  {                                                     \
 405 .    if (symbol != (asymbol *) NULL)                     \
 406 .      {                                                 \
 407 .        if (bfd_is_com_section (symbol->section))       \
 408 .          {                                             \
 409 .            relocation = 0;                             \
 410 .          }                                             \
 411 .        else                                            \
 412 .          {                                             \
 413 .            relocation = symbol->value;                 \
 414 .          }                                             \
 415 .      }                                                 \
 416 .  }
 417 .
 418 */
 419
 420 /*
 421 FUNCTION
 422         bfd_get_reloc_size
 423
 424 SYNOPSIS
 425         unsigned int bfd_get_reloc_size (reloc_howto_type *);
 426
 427 DESCRIPTION
 428         For a reloc_howto_type that operates on a fixed number of bytes,
 429         this returns the number of bytes operated on.
 430  */
 431
 432 unsigned int
 433 bfd_get_reloc_size (howto)
 434      reloc_howto_type *howto;
 435 {
 436   switch (howto->size)
 437     {
 438     case 0: return 1;
 439     case 1: return 2;
 440     case 2: return 4;
 441     case 3: return 0;
 442     case 4: return 8;
 443     case 8: return 16;
 444     case -2: return 4;
 445     default: abort ();
 446     }
 447 }
 448
 449 /*
 450 TYPEDEF
 451         arelent_chain
 452
 453 DESCRIPTION
 454
 455         How relocs are tied together in an <<asection>>:
 456
 457 .typedef struct relent_chain
 458 .{
 459 .  arelent relent;
 460 .  struct relent_chain *next;
 461 .}
 462 .arelent_chain;
 463 .
 464 */
 465
 466 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 467 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 468
 469 /*
 470 FUNCTION
 471         bfd_check_overflow
 472
 473 SYNOPSIS
 474         bfd_reloc_status_type
 475                 bfd_check_overflow
 476                         (enum complain_overflow how,
 477                          unsigned int bitsize,
 478                          unsigned int rightshift,
 479                          unsigned int addrsize,
 480                          bfd_vma relocation);
 481
 482 DESCRIPTION
 483         Perform overflow checking on @var{relocation} which has
 484         @var{bitsize} significant bits and will be shifted right by
 485         @var{rightshift} bits, on a machine with addresses containing
 486         @var{addrsize} significant bits.  The result is either of
 487         @code{bfd_reloc_ok} or @code{bfd_reloc_overflow}.
 488
 489 */
 490
 491 bfd_reloc_status_type
 492 bfd_check_overflow (how, bitsize, rightshift, addrsize, relocation)
 493      enum complain_overflow how;
 494      unsigned int bitsize;
 495      unsigned int rightshift;
 496      unsigned int addrsize;
 497      bfd_vma relocation;
 498 {
 499   bfd_vma fieldmask, addrmask, signmask, ss, a;
 500   bfd_reloc_status_type flag = bfd_reloc_ok;
 501
 502   a = relocation;
 503
 504   /* Note: BITSIZE should always be <= ADDRSIZE, but in case it's not,
 505      we'll be permissive: extra bits in the field mask will
 506      automatically extend the address mask for purposes of the
 507      overflow check.  */
 508   fieldmask = N_ONES (bitsize);
 509   addrmask = N_ONES (addrsize) | fieldmask;
 510
 511   switch (how)
 512     {
 513     case complain_overflow_dont:
 514       break;
 515
 516     case complain_overflow_signed:
 517       /* If any sign bits are set, all sign bits must be set.  That
 518          is, A must be a valid negative address after shifting.  */
 519       a = (a & addrmask) >> rightshift;
 520       signmask = ~ (fieldmask >> 1);
 521       ss = a & signmask;
 522       if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
 523         flag = bfd_reloc_overflow;
 524       break;
 525
 526     case complain_overflow_unsigned:
 527       /* We have an overflow if the address does not fit in the field.  */
 528       a = (a & addrmask) >> rightshift;
 529       if ((a & ~ fieldmask) != 0)
 530         flag = bfd_reloc_overflow;
 531       break;
 532
 533     case complain_overflow_bitfield:
 534       /* Bitfields are sometimes signed, sometimes unsigned.  We
 535          explicitly allow an address wrap too, which means a bitfield
 536          of n bits is allowed to store -2**n to 2**n-1.  Thus overflow
 537          if the value has some, but not all, bits set outside the
 538          field.  */
 539       a >>= rightshift;
 540       ss = a & ~ fieldmask;
 541       if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & ~ fieldmask))
 542         flag = bfd_reloc_overflow;
 543       break;
 544
 545     default:
 546       abort ();
 547     }
 548
 549   return flag;
 550 }
 551
 552 /*
 553 FUNCTION
 554         bfd_perform_relocation
 555
 556 SYNOPSIS
 557         bfd_reloc_status_type
 558                 bfd_perform_relocation
 559                         (bfd *abfd,
 560                          arelent *reloc_entry,
 561                          PTR data,
 562                          asection *input_section,
 563                          bfd *output_bfd,
 564                          char **error_message);
 565
 566 DESCRIPTION
 567         If @var{output_bfd} is supplied to this function, the
 568         generated image will be relocatable; the relocations are
 569         copied to the output file after they have been changed to
 570         reflect the new state of the world. There are two ways of
 571         reflecting the results of partial linkage in an output file:
 572         by modifying the output data in place, and by modifying the
 573         relocation record.  Some native formats (e.g., basic a.out and
 574         basic coff) have no way of specifying an addend in the
 575         relocation type, so the addend has to go in the output data.
 576         This is no big deal since in these formats the output data
 577         slot will always be big enough for the addend. Complex reloc
 578         types with addends were invented to solve just this problem.
 579         The @var{error_message} argument is set to an error message if
 580         this return @code{bfd_reloc_dangerous}.
 581
 582 */
 583
 584 bfd_reloc_status_type
 585 bfd_perform_relocation (abfd, reloc_entry, data, input_section, output_bfd,
 586                         error_message)
 587      bfd *abfd;
 588      arelent *reloc_entry;
 589      PTR data;
 590      asection *input_section;
 591      bfd *output_bfd;
 592      char **error_message;
 593 {
 594   bfd_vma relocation;
 595   bfd_reloc_status_type flag = bfd_reloc_ok;
 596   bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
 597   bfd_vma output_base = 0;
 598   reloc_howto_type *howto = reloc_entry->howto;
 599   asection *reloc_target_output_section;
 600   asymbol *symbol;
 601
 602   symbol = *(reloc_entry->sym_ptr_ptr);
 603   if (bfd_is_abs_section (symbol->section)
 604       && output_bfd != (bfd *) NULL)
 605     {
 606       reloc_entry->address += input_section->output_offset;
 607       return bfd_reloc_ok;
 608     }
 609
 610   /* If we are not producing relocateable output, return an error if
 611      the symbol is not defined.  An undefined weak symbol is
 612      considered to have a value of zero (SVR4 ABI, p. 4-27).  */
 613   if (bfd_is_und_section (symbol->section)
 614       && (symbol->flags & BSF_WEAK) == 0
 615       && output_bfd == (bfd *) NULL)
 616     flag = bfd_reloc_undefined;
 617
 618   /* If there is a function supplied to handle this relocation type,
 619      call it.  It'll return `bfd_reloc_continue' if further processing
 620      can be done.  */
 621   if (howto->special_function)
 622     {
 623       bfd_reloc_status_type cont;
 624       cont = howto->special_function (abfd, reloc_entry, symbol, data,
 625                                       input_section, output_bfd,
 626                                       error_message);
 627       if (cont != bfd_reloc_continue)
 628         return cont;
 629     }
 630
 631   /* Is the address of the relocation really within the section?  */
 632   if (reloc_entry->address > (input_section->_cooked_size
 633                               / bfd_octets_per_byte (abfd)))
 634     return bfd_reloc_outofrange;
 635
 636   /* Work out which section the relocation is targetted at and the
 637      initial relocation command value.  */
 638
 639   /* Get symbol value.  (Common symbols are special.)  */
 640   if (bfd_is_com_section (symbol->section))
 641     relocation = 0;
 642   else
 643     relocation = symbol->value;
 644
 645   reloc_target_output_section = symbol->section->output_section;
 646
 647   /* Convert input-section-relative symbol value to absolute.  */
 648   if (output_bfd && howto->partial_inplace == false)
 649     output_base = 0;
 650   else
 651     output_base = reloc_target_output_section->vma;
 652
 653   relocation += output_base + symbol->section->output_offset;
 654
 655   /* Add in supplied addend.  */
 656   relocation += reloc_entry->addend;
 657
 658   /* Here the variable relocation holds the final address of the
 659      symbol we are relocating against, plus any addend.  */
 660
 661   if (howto->pc_relative == true)
 662     {
 663       /* This is a PC relative relocation.  We want to set RELOCATION
 664          to the distance between the address of the symbol and the
 665          location.  RELOCATION is already the address of the symbol.
 666
 667          We start by subtracting the address of the section containing
 668          the location.
 669
 670          If pcrel_offset is set, we must further subtract the position
 671          of the location within the section.  Some targets arrange for
 672          the addend to be the negative of the position of the location
 673          within the section; for example, i386-aout does this.  For
 674          i386-aout, pcrel_offset is false.  Some other targets do not
 675          include the position of the location; for example, m88kbcs,
 676          or ELF.  For those targets, pcrel_offset is true.
 677
 678          If we are producing relocateable output, then we must ensure
 679          that this reloc will be correctly computed when the final
 680          relocation is done.  If pcrel_offset is false we want to wind
 681          up with the negative of the location within the section,
 682          which means we must adjust the existing addend by the change
 683          in the location within the section.  If pcrel_offset is true
 684          we do not want to adjust the existing addend at all.
 685
 686          FIXME: This seems logical to me, but for the case of
 687          producing relocateable output it is not what the code
 688          actually does.  I don't want to change it, because it seems
 689          far too likely that something will break.  */
 690
 691       relocation -=
 692         input_section->output_section->vma + input_section->output_offset;
 693
 694       if (howto->pcrel_offset == true)
 695         relocation -= reloc_entry->address;
 696     }
 697
 698   if (output_bfd != (bfd *) NULL)
 699     {
 700       if (howto->partial_inplace == false)
 701         {
 702           /* This is a partial relocation, and we want to apply the relocation
 703              to the reloc entry rather than the raw data. Modify the reloc
 704              inplace to reflect what we now know.  */
 705           reloc_entry->addend = relocation;
 706           reloc_entry->address += input_section->output_offset;
 707           return flag;
 708         }
 709       else
 710         {
 711           /* This is a partial relocation, but inplace, so modify the
 712              reloc record a bit.
 713
 714              If we've relocated with a symbol with a section, change
 715              into a ref to the section belonging to the symbol.  */
 716
 717           reloc_entry->address += input_section->output_offset;
 718
 719           /* WTF?? */
 720           if (abfd->xvec->flavour == bfd_target_coff_flavour
 721               && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
 722               && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
 723             {
 724 #if 1
 725               /* For m68k-coff, the addend was being subtracted twice during
 726                  relocation with -r.  Removing the line below this comment
 727                  fixes that problem; see PR 2953.
 728
 729 However, Ian wrote the following, regarding removing the line below,
 730 which explains why it is still enabled:  --djm
 731
 732 If you put a patch like that into BFD you need to check all the COFF
 733 linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
 734 SCO); see coff_i386_reloc in coff-i386.c where I worked around the
 735 problem in a different way.  There may very well be a reason that the
 736 code works as it does.
 737
 738 Hmmm.  The first obvious point is that bfd_perform_relocation should
 739 not have any tests that depend upon the flavour.  It's seem like
 740 entirely the wrong place for such a thing.  The second obvious point
 741 is that the current code ignores the reloc addend when producing
 742 relocateable output for COFF.  That's peculiar.  In fact, I really
 743 have no idea what the point of the line you want to remove is.
 744
 745 A typical COFF reloc subtracts the old value of the symbol and adds in
 746 the new value to the location in the object file (if it's a pc
 747 relative reloc it adds the difference between the symbol value and the
 748 location).  When relocating we need to preserve that property.
 749
 750 BFD handles this by setting the addend to the negative of the old
 751 value of the symbol.  Unfortunately it handles common symbols in a
 752 non-standard way (it doesn't subtract the old value) but that's a
 753 different story (we can't change it without losing backward
 754 compatibility with old object files) (coff-i386 does subtract the old
 755 value, to be compatible with existing coff-i386 targets, like SCO).
 756
 757 So everything works fine when not producing relocateable output.  When
 758 we are producing relocateable output, logically we should do exactly
 759 what we do when not producing relocateable output.  Therefore, your
 760 patch is correct.  In fact, it should probably always just set
 761 reloc_entry->addend to 0 for all cases, since it is, in fact, going to
 762 add the value into the object file.  This won't hurt the COFF code,
 763 which doesn't use the addend; I'm not sure what it will do to other
 764 formats (the thing to check for would be whether any formats both use
 765 the addend and set partial_inplace).
 766
 767 When I wanted to make coff-i386 produce relocateable output, I ran
 768 into the problem that you are running into: I wanted to remove that
 769 line.  Rather than risk it, I made the coff-i386 relocs use a special
 770 function; it's coff_i386_reloc in coff-i386.c.  The function
 771 specifically adds the addend field into the object file, knowing that
 772 bfd_perform_relocation is not going to.  If you remove that line, then
 773 coff-i386.c will wind up adding the addend field in twice.  It's
 774 trivial to fix; it just needs to be done.
 775
 776 The problem with removing the line is just that it may break some
 777 working code.  With BFD it's hard to be sure of anything.  The right
 778 way to deal with this is simply to build and test at least all the
 779 supported COFF targets.  It should be straightforward if time and disk
 780 space consuming.  For each target:
 781     1) build the linker
 782     2) generate some executable, and link it using -r (I would
 783        probably use paranoia.o and link against newlib/libc.a, which
 784        for all the supported targets would be available in
 785        /usr/cygnus/progressive/H-host/target/lib/libc.a).
 786     3) make the change to reloc.c
 787     4) rebuild the linker
 788     5) repeat step 2
 789     6) if the resulting object files are the same, you have at least
 790        made it no worse
 791     7) if they are different you have to figure out which version is
 792        right
 793 */
 794               relocation -= reloc_entry->addend;
 795 #endif
 796               reloc_entry->addend = 0;
 797             }
 798           else
 799             {
 800               reloc_entry->addend = relocation;
 801             }
 802         }
 803     }
 804   else
 805     {
 806       reloc_entry->addend = 0;
 807     }
 808
 809   /* FIXME: This overflow checking is incomplete, because the value
 810      might have overflowed before we get here.  For a correct check we
 811      need to compute the value in a size larger than bitsize, but we
 812      can't reasonably do that for a reloc the same size as a host
 813      machine word.
 814      FIXME: We should also do overflow checking on the result after
 815      adding in the value contained in the object file.  */
 816   if (howto->complain_on_overflow != complain_overflow_dont
 817       && flag == bfd_reloc_ok)
 818     flag = bfd_check_overflow (howto->complain_on_overflow,
 819                                howto->bitsize,
 820                                howto->rightshift,
 821                                bfd_arch_bits_per_address (abfd),
 822                                relocation);
 823
 824   /* Either we are relocating all the way, or we don't want to apply
 825      the relocation to the reloc entry (probably because there isn't
 826      any room in the output format to describe addends to relocs).  */
 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   relocation <<= (bfd_vma) howto->bitpos;
 855
 856   /* Wait for the day when all have the mask in them.  */
 857
 858   /* What we do:
 859      i instruction to be left alone
 860      o offset within instruction
 861      r relocation offset to apply
 862      S src mask
 863      D dst mask
 864      N ~dst mask
 865      A part 1
 866      B part 2
 867      R result
 868
 869      Do this:
 870      ((  i i i i i o o o o o  from bfd_get<size>
 871      and           S S S S S) to get the size offset we want
 872      +   r r r r r r r r r r) to get the final value to place
 873      and           D D D D D  to chop to right size
 874      -----------------------
 875      =             A A A A A
 876      And this:
 877      (   i i i i i o o o o o  from bfd_get<size>
 878      and N N N N N          ) get instruction
 879      -----------------------
 880      =   B B B B B
 881
 882      And then:
 883      (   B B B B B
 884      or            A A A A A)
 885      -----------------------
 886      =   R R R R R R R R R R  put into bfd_put<size>
 887      */
 888
 889 #define DOIT(x) \
 890   x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))
 891
 892   switch (howto->size)
 893     {
 894     case 0:
 895       {
 896         char x = bfd_get_8 (abfd, (char *) data + octets);
 897         DOIT (x);
 898         bfd_put_8 (abfd, x, (unsigned char *) data + octets);
 899       }
 900       break;
 901
 902     case 1:
 903       {
 904         short x = bfd_get_16 (abfd, (bfd_byte *) data + octets);
 905         DOIT (x);
 906         bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + octets);
 907       }
 908       break;
 909     case 2:
 910       {
 911         long x = bfd_get_32 (abfd, (bfd_byte *) data + octets);
 912         DOIT (x);
 913         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 914       }
 915       break;
 916     case -2:
 917       {
 918         long x = bfd_get_32 (abfd, (bfd_byte *) data + octets);
 919         relocation = -relocation;
 920         DOIT (x);
 921         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 922       }
 923       break;
 924
 925     case -1:
 926       {
 927         long x = bfd_get_16 (abfd, (bfd_byte *) data + octets);
 928         relocation = -relocation;
 929         DOIT (x);
 930         bfd_put_16 (abfd, (bfd_vma) x, (bfd_byte *) data + octets);
 931       }
 932       break;
 933
 934     case 3:
 935       /* Do nothing */
 936       break;
 937
 938     case 4:
 939 #ifdef BFD64
 940       {
 941         bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data + octets);
 942         DOIT (x);
 943         bfd_put_64 (abfd, x, (bfd_byte *) data + octets);
 944       }
 945 #else
 946       abort ();
 947 #endif
 948       break;
 949     default:
 950       return bfd_reloc_other;
 951     }
 952
 953   return flag;
 954 }
 955
 956 /*
 957 FUNCTION
 958         bfd_install_relocation
 959
 960 SYNOPSIS
 961         bfd_reloc_status_type
 962                 bfd_install_relocation
 963                         (bfd *abfd,
 964                          arelent *reloc_entry,
 965                          PTR data, bfd_vma data_start,
 966                          asection *input_section,
 967                          char **error_message);
 968
 969 DESCRIPTION
 970         This looks remarkably like <<bfd_perform_relocation>>, except it
 971         does not expect that the section contents have been filled in.
 972         I.e., it's suitable for use when creating, rather than applying
 973         a relocation.
 974
 975         For now, this function should be considered reserved for the
 976         assembler.
 977 */
 978
 979 bfd_reloc_status_type
 980 bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset,
 981                         input_section, error_message)
 982      bfd *abfd;
 983      arelent *reloc_entry;
 984      PTR data_start;
 985      bfd_vma data_start_offset;
 986      asection *input_section;
 987      char **error_message;
 988 {
 989   bfd_vma relocation;
 990   bfd_reloc_status_type flag = bfd_reloc_ok;
 991   bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
 992   bfd_vma output_base = 0;
 993   reloc_howto_type *howto = reloc_entry->howto;
 994   asection *reloc_target_output_section;
 995   asymbol *symbol;
 996   bfd_byte *data;
 997
 998   symbol = *(reloc_entry->sym_ptr_ptr);
 999   if (bfd_is_abs_section (symbol->section))
1000     {
1001       reloc_entry->address += input_section->output_offset;
1002       return bfd_reloc_ok;
1003     }
1004
1005   /* If there is a function supplied to handle this relocation type,
1006      call it.  It'll return `bfd_reloc_continue' if further processing
1007      can be done.  */
1008   if (howto->special_function)
1009     {
1010       bfd_reloc_status_type cont;
1011
1012       /* XXX - The special_function calls haven't been fixed up to deal
1013          with creating new relocations and section contents.  */
1014       cont = howto->special_function (abfd, reloc_entry, symbol,
1015                                       /* XXX - Non-portable! */
1016                                       ((bfd_byte *) data_start
1017                                        - data_start_offset),
1018                                       input_section, abfd, error_message);
1019       if (cont != bfd_reloc_continue)
1020         return cont;
1021     }
1022
1023   /* Is the address of the relocation really within the section?  */
1024   if (reloc_entry->address > (input_section->_cooked_size
1025                               / bfd_octets_per_byte (abfd)))
1026     return bfd_reloc_outofrange;
1027
1028   /* Work out which section the relocation is targetted at and the
1029      initial relocation command value.  */
1030
1031   /* Get symbol value.  (Common symbols are special.)  */
1032   if (bfd_is_com_section (symbol->section))
1033     relocation = 0;
1034   else
1035     relocation = symbol->value;
1036
1037   reloc_target_output_section = symbol->section->output_section;
1038
1039   /* Convert input-section-relative symbol value to absolute.  */
1040   if (howto->partial_inplace == false)
1041     output_base = 0;
1042   else
1043     output_base = reloc_target_output_section->vma;
1044
1045   relocation += output_base + symbol->section->output_offset;
1046
1047   /* Add in supplied addend.  */
1048   relocation += reloc_entry->addend;
1049
1050   /* Here the variable relocation holds the final address of the
1051      symbol we are relocating against, plus any addend.  */
1052
1053   if (howto->pc_relative == true)
1054     {
1055       /* This is a PC relative relocation.  We want to set RELOCATION
1056          to the distance between the address of the symbol and the
1057          location.  RELOCATION is already the address of the symbol.
1058
1059          We start by subtracting the address of the section containing
1060          the location.
1061
1062          If pcrel_offset is set, we must further subtract the position
1063          of the location within the section.  Some targets arrange for
1064          the addend to be the negative of the position of the location
1065          within the section; for example, i386-aout does this.  For
1066          i386-aout, pcrel_offset is false.  Some other targets do not
1067          include the position of the location; for example, m88kbcs,
1068          or ELF.  For those targets, pcrel_offset is true.
1069
1070          If we are producing relocateable output, then we must ensure
1071          that this reloc will be correctly computed when the final
1072          relocation is done.  If pcrel_offset is false we want to wind
1073          up with the negative of the location within the section,
1074          which means we must adjust the existing addend by the change
1075          in the location within the section.  If pcrel_offset is true
1076          we do not want to adjust the existing addend at all.
1077
1078          FIXME: This seems logical to me, but for the case of
1079          producing relocateable output it is not what the code
1080          actually does.  I don't want to change it, because it seems
1081          far too likely that something will break.  */
1082
1083       relocation -=
1084         input_section->output_section->vma + input_section->output_offset;
1085
1086       if (howto->pcrel_offset == true && howto->partial_inplace == true)
1087         relocation -= reloc_entry->address;
1088     }
1089
1090   if (howto->partial_inplace == false)
1091     {
1092       /* This is a partial relocation, and we want to apply the relocation
1093          to the reloc entry rather than the raw data. Modify the reloc
1094          inplace to reflect what we now know.  */
1095       reloc_entry->addend = relocation;
1096       reloc_entry->address += input_section->output_offset;
1097       return flag;
1098     }
1099   else
1100     {
1101       /* This is a partial relocation, but inplace, so modify the
1102          reloc record a bit.
1103
1104          If we've relocated with a symbol with a section, change
1105          into a ref to the section belonging to the symbol.  */
1106       reloc_entry->address += input_section->output_offset;
1107
1108       /* WTF?? */
1109       if (abfd->xvec->flavour == bfd_target_coff_flavour
1110           && strcmp (abfd->xvec->name, "coff-Intel-little") != 0
1111           && strcmp (abfd->xvec->name, "coff-Intel-big") != 0)
1112         {
1113 #if 1
1114 /* For m68k-coff, the addend was being subtracted twice during
1115    relocation with -r.  Removing the line below this comment
1116    fixes that problem; see PR 2953.
1117
1118 However, Ian wrote the following, regarding removing the line below,
1119 which explains why it is still enabled:  --djm
1120
1121 If you put a patch like that into BFD you need to check all the COFF
1122 linkers.  I am fairly certain that patch will break coff-i386 (e.g.,
1123 SCO); see coff_i386_reloc in coff-i386.c where I worked around the
1124 problem in a different way.  There may very well be a reason that the
1125 code works as it does.
1126
1127 Hmmm.  The first obvious point is that bfd_install_relocation should
1128 not have any tests that depend upon the flavour.  It's seem like
1129 entirely the wrong place for such a thing.  The second obvious point
1130 is that the current code ignores the reloc addend when producing
1131 relocateable output for COFF.  That's peculiar.  In fact, I really
1132 have no idea what the point of the line you want to remove is.
1133
1134 A typical COFF reloc subtracts the old value of the symbol and adds in
1135 the new value to the location in the object file (if it's a pc
1136 relative reloc it adds the difference between the symbol value and the
1137 location).  When relocating we need to preserve that property.
1138
1139 BFD handles this by setting the addend to the negative of the old
1140 value of the symbol.  Unfortunately it handles common symbols in a
1141 non-standard way (it doesn't subtract the old value) but that's a
1142 different story (we can't change it without losing backward
1143 compatibility with old object files) (coff-i386 does subtract the old
1144 value, to be compatible with existing coff-i386 targets, like SCO).
1145
1146 So everything works fine when not producing relocateable output.  When
1147 we are producing relocateable output, logically we should do exactly
1148 what we do when not producing relocateable output.  Therefore, your
1149 patch is correct.  In fact, it should probably always just set
1150 reloc_entry->addend to 0 for all cases, since it is, in fact, going to
1151 add the value into the object file.  This won't hurt the COFF code,
1152 which doesn't use the addend; I'm not sure what it will do to other
1153 formats (the thing to check for would be whether any formats both use
1154 the addend and set partial_inplace).
1155
1156 When I wanted to make coff-i386 produce relocateable output, I ran
1157 into the problem that you are running into: I wanted to remove that
1158 line.  Rather than risk it, I made the coff-i386 relocs use a special
1159 function; it's coff_i386_reloc in coff-i386.c.  The function
1160 specifically adds the addend field into the object file, knowing that
1161 bfd_install_relocation is not going to.  If you remove that line, then
1162 coff-i386.c will wind up adding the addend field in twice.  It's
1163 trivial to fix; it just needs to be done.
1164
1165 The problem with removing the line is just that it may break some
1166 working code.  With BFD it's hard to be sure of anything.  The right
1167 way to deal with this is simply to build and test at least all the
1168 supported COFF targets.  It should be straightforward if time and disk
1169 space consuming.  For each target:
1170     1) build the linker
1171     2) generate some executable, and link it using -r (I would
1172        probably use paranoia.o and link against newlib/libc.a, which
1173        for all the supported targets would be available in
1174        /usr/cygnus/progressive/H-host/target/lib/libc.a).
1175     3) make the change to reloc.c
1176     4) rebuild the linker
1177     5) repeat step 2
1178     6) if the resulting object files are the same, you have at least
1179        made it no worse
1180     7) if they are different you have to figure out which version is
1181        right.  */
1182           relocation -= reloc_entry->addend;
1183 #endif
1184           reloc_entry->addend = 0;
1185         }
1186       else
1187         {
1188           reloc_entry->addend = relocation;
1189         }
1190     }
1191
1192   /* FIXME: This overflow checking is incomplete, because the value
1193      might have overflowed before we get here.  For a correct check we
1194      need to compute the value in a size larger than bitsize, but we
1195      can't reasonably do that for a reloc the same size as a host
1196      machine word.
1197      FIXME: We should also do overflow checking on the result after
1198      adding in the value contained in the object file.  */
1199   if (howto->complain_on_overflow != complain_overflow_dont)
1200     flag = bfd_check_overflow (howto->complain_on_overflow,
1201                                howto->bitsize,
1202                                howto->rightshift,
1203                                bfd_arch_bits_per_address (abfd),
1204                                relocation);
1205
1206   /* Either we are relocating all the way, or we don't want to apply
1207      the relocation to the reloc entry (probably because there isn't
1208      any room in the output format to describe addends to relocs).  */
1209
1210   /* The cast to bfd_vma avoids a bug in the Alpha OSF/1 C compiler
1211      (OSF version 1.3, compiler version 3.11).  It miscompiles the
1212      following program:
1213
1214      struct str
1215      {
1216        unsigned int i0;
1217      } s = { 0 };
1218
1219      int
1220      main ()
1221      {
1222        unsigned long x;
1223
1224        x = 0x100000000;
1225        x <<= (unsigned long) s.i0;
1226        if (x == 0)
1227          printf ("failed\n");
1228        else
1229          printf ("succeeded (%lx)\n", x);
1230      }
1231      */
1232
1233   relocation >>= (bfd_vma) howto->rightshift;
1234
1235   /* Shift everything up to where it's going to be used.  */
1236   relocation <<= (bfd_vma) howto->bitpos;
1237
1238   /* Wait for the day when all have the mask in them.  */
1239
1240   /* What we do:
1241      i instruction to be left alone
1242      o offset within instruction
1243      r relocation offset to apply
1244      S src mask
1245      D dst mask
1246      N ~dst mask
1247      A part 1
1248      B part 2
1249      R result
1250
1251      Do this:
1252      ((  i i i i i o o o o o  from bfd_get<size>
1253      and           S S S S S) to get the size offset we want
1254      +   r r r r r r r r r r) to get the final value to place
1255      and           D D D D D  to chop to right size
1256      -----------------------
1257      =             A A A A A
1258      And this:
1259      (   i i i i i o o o o o  from bfd_get<size>
1260      and N N N N N          ) get instruction
1261      -----------------------
1262      =   B B B B B
1263
1264      And then:
1265      (   B B B B B
1266      or            A A A A A)
1267      -----------------------
1268      =   R R R R R R R R R R  put into bfd_put<size>
1269      */
1270
1271 #define DOIT(x) \
1272   x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) +  relocation) & howto->dst_mask))
1273
1274   data = (bfd_byte *) data_start + (octets - data_start_offset);
1275
1276   switch (howto->size)
1277     {
1278     case 0:
1279       {
1280         char x = bfd_get_8 (abfd, (char *) data);
1281         DOIT (x);
1282         bfd_put_8 (abfd, x, (unsigned char *) data);
1283       }
1284       break;
1285
1286     case 1:
1287       {
1288         short x = bfd_get_16 (abfd, (bfd_byte *) data);
1289         DOIT (x);
1290         bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data);
1291       }
1292       break;
1293     case 2:
1294       {
1295         long x = bfd_get_32 (abfd, (bfd_byte *) data);
1296         DOIT (x);
1297         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data);
1298       }
1299       break;
1300     case -2:
1301       {
1302         long x = bfd_get_32 (abfd, (bfd_byte *) data);
1303         relocation = -relocation;
1304         DOIT (x);
1305         bfd_put_32 (abfd, (bfd_vma) x, (bfd_byte *) data);
1306       }
1307       break;
1308
1309     case 3:
1310       /* Do nothing */
1311       break;
1312
1313     case 4:
1314       {
1315         bfd_vma x = bfd_get_64 (abfd, (bfd_byte *) data);
1316         DOIT (x);
1317         bfd_put_64 (abfd, x, (bfd_byte *) data);
1318       }
1319       break;
1320     default:
1321       return bfd_reloc_other;
1322     }
1323
1324   return flag;
1325 }
1326
1327 /* This relocation routine is used by some of the backend linkers.
1328    They do not construct asymbol or arelent structures, so there is no
1329    reason for them to use bfd_perform_relocation.  Also,
1330    bfd_perform_relocation is so hacked up it is easier to write a new
1331    function than to try to deal with it.
1332
1333    This routine does a final relocation.  Whether it is useful for a
1334    relocateable link depends upon how the object format defines
1335    relocations.
1336
1337    FIXME: This routine ignores any special_function in the HOWTO,
1338    since the existing special_function values have been written for
1339    bfd_perform_relocation.
1340
1341    HOWTO is the reloc howto information.
1342    INPUT_BFD is the BFD which the reloc applies to.
1343    INPUT_SECTION is the section which the reloc applies to.
1344    CONTENTS is the contents of the section.
1345    ADDRESS is the address of the reloc within INPUT_SECTION.
1346    VALUE is the value of the symbol the reloc refers to.
1347    ADDEND is the addend of the reloc.  */
1348
1349 bfd_reloc_status_type
1350 _bfd_final_link_relocate (howto, input_bfd, input_section, contents, address,
1351                           value, addend)
1352      reloc_howto_type *howto;
1353      bfd *input_bfd;
1354      asection *input_section;
1355      bfd_byte *contents;
1356      bfd_vma address;
1357      bfd_vma value;
1358      bfd_vma addend;
1359 {
1360   bfd_vma relocation;
1361
1362   /* Sanity check the address.  */
1363   if (address > input_section->_raw_size)
1364     return bfd_reloc_outofrange;
1365
1366   /* This function assumes that we are dealing with a basic relocation
1367      against a symbol.  We want to compute the value of the symbol to
1368      relocate to.  This is just VALUE, the value of the symbol, plus
1369      ADDEND, any addend associated with the reloc.  */
1370   relocation = value + addend;
1371
1372   /* If the relocation is PC relative, we want to set RELOCATION to
1373      the distance between the symbol (currently in RELOCATION) and the
1374      location we are relocating.  Some targets (e.g., i386-aout)
1375      arrange for the contents of the section to be the negative of the
1376      offset of the location within the section; for such targets
1377      pcrel_offset is false.  Other targets (e.g., m88kbcs or ELF)
1378      simply leave the contents of the section as zero; for such
1379      targets pcrel_offset is true.  If pcrel_offset is false we do not
1380      need to subtract out the offset of the location within the
1381      section (which is just ADDRESS).  */
1382   if (howto->pc_relative)
1383     {
1384       relocation -= (input_section->output_section->vma
1385                      + input_section->output_offset);
1386       if (howto->pcrel_offset)
1387         relocation -= address;
1388     }
1389
1390   return _bfd_relocate_contents (howto, input_bfd, relocation,
1391                                  contents + address);
1392 }
1393
1394 /* Relocate a given location using a given value and howto.  */
1395
1396 bfd_reloc_status_type
1397 _bfd_relocate_contents (howto, input_bfd, relocation, location)
1398      reloc_howto_type *howto;
1399      bfd *input_bfd;
1400      bfd_vma relocation;
1401      bfd_byte *location;
1402 {
1403   int size;
1404   bfd_vma x = 0;
1405   bfd_reloc_status_type flag;
1406   unsigned int rightshift = howto->rightshift;
1407   unsigned int bitpos = howto->bitpos;
1408
1409   /* If the size is negative, negate RELOCATION.  This isn't very
1410      general.  */
1411   if (howto->size < 0)
1412     relocation = -relocation;
1413
1414   /* Get the value we are going to relocate.  */
1415   size = bfd_get_reloc_size (howto);
1416   switch (size)
1417     {
1418     default:
1419     case 0:
1420       abort ();
1421     case 1:
1422       x = bfd_get_8 (input_bfd, location);
1423       break;
1424     case 2:
1425       x = bfd_get_16 (input_bfd, location);
1426       break;
1427     case 4:
1428       x = bfd_get_32 (input_bfd, location);
1429       break;
1430     case 8:
1431 #ifdef BFD64
1432       x = bfd_get_64 (input_bfd, location);
1433 #else
1434       abort ();
1435 #endif
1436       break;
1437     }
1438
1439   /* Check for overflow.  FIXME: We may drop bits during the addition
1440      which we don't check for.  We must either check at every single
1441      operation, which would be tedious, or we must do the computations
1442      in a type larger than bfd_vma, which would be inefficient.  */
1443   flag = bfd_reloc_ok;
1444   if (howto->complain_on_overflow != complain_overflow_dont)
1445     {
1446       bfd_vma addrmask, fieldmask, signmask, ss;
1447       bfd_vma a, b, sum;
1448
1449       /* Get the values to be added together.  For signed and unsigned
1450          relocations, we assume that all values should be truncated to
1451          the size of an address.  For bitfields, all the bits matter.
1452          See also bfd_check_overflow.  */
1453       fieldmask = N_ONES (howto->bitsize);
1454       addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask;
1455       a = relocation;
1456       b = x & howto->src_mask;
1457
1458       switch (howto->complain_on_overflow)
1459         {
1460         case complain_overflow_signed:
1461           a = (a & addrmask) >> rightshift;
1462
1463           /* If any sign bits are set, all sign bits must be set.
1464              That is, A must be a valid negative address after
1465              shifting.  */
1466           signmask = ~ (fieldmask >> 1);
1467           ss = a & signmask;
1468           if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
1469             flag = bfd_reloc_overflow;
1470
1471           /* We only need this next bit of code if the sign bit of B
1472              is below the sign bit of A.  This would only happen if
1473              SRC_MASK had fewer bits than BITSIZE.  Note that if
1474              SRC_MASK has more bits than BITSIZE, we can get into
1475              trouble; we would need to verify that B is in range, as
1476              we do for A above.  */
1477           signmask = ((~ howto->src_mask) >> 1) & howto->src_mask;
1478
1479           /* Set all the bits above the sign bit.  */
1480           b = (b ^ signmask) - signmask;
1481
1482           b = (b & addrmask) >> bitpos;
1483
1484           /* Now we can do the addition.  */
1485           sum = a + b;
1486
1487           /* See if the result has the correct sign.  Bits above the
1488              sign bit are junk now; ignore them.  If the sum is
1489              positive, make sure we did not have all negative inputs;
1490              if the sum is negative, make sure we did not have all
1491              positive inputs.  The test below looks only at the sign
1492              bits, and it really just
1493                  SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM)
1494              */
1495           signmask = (fieldmask >> 1) + 1;
1496           if (((~ (a ^ b)) & (a ^ sum)) & signmask)
1497             flag = bfd_reloc_overflow;
1498
1499           break;
1500
1501         case complain_overflow_unsigned:
1502           /* Checking for an unsigned overflow is relatively easy:
1503              trim the addresses and add, and trim the result as well.
1504              Overflow is normally indicated when the result does not
1505              fit in the field.  However, we also need to consider the
1506              case when, e.g., fieldmask is 0x7fffffff or smaller, an
1507              input is 0x80000000, and bfd_vma is only 32 bits; then we
1508              will get sum == 0, but there is an overflow, since the
1509              inputs did not fit in the field.  Instead of doing a
1510              separate test, we can check for this by or-ing in the
1511              operands when testing for the sum overflowing its final
1512              field.  */
1513           a = (a & addrmask) >> rightshift;
1514           b = (b & addrmask) >> bitpos;
1515           sum = (a + b) & addrmask;
1516           if ((a | b | sum) & ~ fieldmask)
1517             flag = bfd_reloc_overflow;
1518
1519           break;
1520
1521         case complain_overflow_bitfield:
1522           /* Much like the signed check, but for a field one bit
1523              wider, and no trimming inputs with addrmask.  We allow a
1524              bitfield to represent numbers in the range -2**n to
1525              2**n-1, where n is the number of bits in the field.
1526              Note that when bfd_vma is 32 bits, a 32-bit reloc can't
1527              overflow, which is exactly what we want.  */
1528           a >>= rightshift;
1529
1530           signmask = ~ fieldmask;
1531           ss = a & signmask;
1532           if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & signmask))
1533             flag = bfd_reloc_overflow;
1534
1535           signmask = ((~ howto->src_mask) >> 1) & howto->src_mask;
1536           b = (b ^ signmask) - signmask;
1537
1538           b >>= bitpos;
1539
1540           sum = a + b;
1541
1542           /* We mask with addrmask here to explicitly allow an address
1543              wrap-around.  The Linux kernel relies on it, and it is
1544              the only way to write assembler code which can run when
1545              loaded at a location 0x80000000 away from the location at
1546              which it is linked.  */
1547           signmask = fieldmask + 1;
1548           if (((~ (a ^ b)) & (a ^ sum)) & signmask & addrmask)
1549             flag = bfd_reloc_overflow;
1550
1551           break;
1552
1553         default:
1554           abort ();
1555         }
1556     }
1557
1558   /* Put RELOCATION in the right bits.  */
1559   relocation >>= (bfd_vma) rightshift;
1560   relocation <<= (bfd_vma) bitpos;
1561
1562   /* Add RELOCATION to the right bits of X.  */
1563   x = ((x & ~howto->dst_mask)
1564        | (((x & howto->src_mask) + relocation) & howto->dst_mask));
1565
1566   /* Put the relocated value back in the object file.  */
1567   switch (size)
1568     {
1569     default:
1570     case 0:
1571       abort ();
1572     case 1:
1573       bfd_put_8 (input_bfd, x, location);
1574       break;
1575     case 2:
1576       bfd_put_16 (input_bfd, x, location);
1577       break;
1578     case 4:
1579       bfd_put_32 (input_bfd, x, location);
1580       break;
1581     case 8:
1582 #ifdef BFD64
1583       bfd_put_64 (input_bfd, x, location);
1584 #else
1585       abort ();
1586 #endif
1587       break;
1588     }
1589
1590   return flag;
1591 }
1592
1593 /*
1594 DOCDD
1595 INODE
1596         howto manager,  , typedef arelent, Relocations
1597
1598 SECTION
1599         The howto manager
1600
1601         When an application wants to create a relocation, but doesn't
1602         know what the target machine might call it, it can find out by
1603         using this bit of code.
1604
1605 */
1606
1607 /*
1608 TYPEDEF
1609         bfd_reloc_code_type
1610
1611 DESCRIPTION
1612         The insides of a reloc code.  The idea is that, eventually, there
1613         will be one enumerator for every type of relocation we ever do.
1614         Pass one of these values to <<bfd_reloc_type_lookup>>, and it'll
1615         return a howto pointer.
1616
1617         This does mean that the application must determine the correct
1618         enumerator value; you can't get a howto pointer from a random set
1619         of attributes.
1620
1621 SENUM
1622    bfd_reloc_code_real
1623
1624 ENUM
1625   BFD_RELOC_64
1626 ENUMX
1627   BFD_RELOC_32
1628 ENUMX
1629   BFD_RELOC_26
1630 ENUMX
1631   BFD_RELOC_24
1632 ENUMX
1633   BFD_RELOC_16
1634 ENUMX
1635   BFD_RELOC_14
1636 ENUMX
1637   BFD_RELOC_8
1638 ENUMDOC
1639   Basic absolute relocations of N bits.
1640
1641 ENUM
1642   BFD_RELOC_64_PCREL
1643 ENUMX
1644   BFD_RELOC_32_PCREL
1645 ENUMX
1646   BFD_RELOC_24_PCREL
1647 ENUMX
1648   BFD_RELOC_16_PCREL
1649 ENUMX
1650   BFD_RELOC_12_PCREL
1651 ENUMX
1652   BFD_RELOC_8_PCREL
1653 ENUMDOC
1654   PC-relative relocations.  Sometimes these are relative to the address
1655 of the relocation itself; sometimes they are relative to the start of
1656 the section containing the relocation.  It depends on the specific target.
1657
1658 The 24-bit relocation is used in some Intel 960 configurations.
1659
1660 ENUM
1661   BFD_RELOC_32_GOT_PCREL
1662 ENUMX
1663   BFD_RELOC_16_GOT_PCREL
1664 ENUMX
1665   BFD_RELOC_8_GOT_PCREL
1666 ENUMX
1667   BFD_RELOC_32_GOTOFF
1668 ENUMX
1669   BFD_RELOC_16_GOTOFF
1670 ENUMX
1671   BFD_RELOC_LO16_GOTOFF
1672 ENUMX
1673   BFD_RELOC_HI16_GOTOFF
1674 ENUMX
1675   BFD_RELOC_HI16_S_GOTOFF
1676 ENUMX
1677   BFD_RELOC_8_GOTOFF
1678 ENUMX
1679   BFD_RELOC_64_PLT_PCREL
1680 ENUMX
1681   BFD_RELOC_32_PLT_PCREL
1682 ENUMX
1683   BFD_RELOC_24_PLT_PCREL
1684 ENUMX
1685   BFD_RELOC_16_PLT_PCREL
1686 ENUMX
1687   BFD_RELOC_8_PLT_PCREL
1688 ENUMX
1689   BFD_RELOC_64_PLTOFF
1690 ENUMX
1691   BFD_RELOC_32_PLTOFF
1692 ENUMX
1693   BFD_RELOC_16_PLTOFF
1694 ENUMX
1695   BFD_RELOC_LO16_PLTOFF
1696 ENUMX
1697   BFD_RELOC_HI16_PLTOFF
1698 ENUMX
1699   BFD_RELOC_HI16_S_PLTOFF
1700 ENUMX
1701   BFD_RELOC_8_PLTOFF
1702 ENUMDOC
1703   For ELF.
1704
1705 ENUM
1706   BFD_RELOC_68K_GLOB_DAT
1707 ENUMX
1708   BFD_RELOC_68K_JMP_SLOT
1709 ENUMX
1710   BFD_RELOC_68K_RELATIVE
1711 ENUMDOC
1712   Relocations used by 68K ELF.
1713
1714 ENUM
1715   BFD_RELOC_32_BASEREL
1716 ENUMX
1717   BFD_RELOC_16_BASEREL
1718 ENUMX
1719   BFD_RELOC_LO16_BASEREL
1720 ENUMX
1721   BFD_RELOC_HI16_BASEREL
1722 ENUMX
1723   BFD_RELOC_HI16_S_BASEREL
1724 ENUMX
1725   BFD_RELOC_8_BASEREL
1726 ENUMX
1727   BFD_RELOC_RVA
1728 ENUMDOC
1729   Linkage-table relative.
1730
1731 ENUM
1732   BFD_RELOC_8_FFnn
1733 ENUMDOC
1734   Absolute 8-bit relocation, but used to form an address like 0xFFnn.
1735
1736 ENUM
1737   BFD_RELOC_32_PCREL_S2
1738 ENUMX
1739   BFD_RELOC_16_PCREL_S2
1740 ENUMX
1741   BFD_RELOC_23_PCREL_S2
1742 ENUMDOC
1743   These PC-relative relocations are stored as word displacements --
1744 i.e., byte displacements shifted right two bits.  The 30-bit word
1745 displacement (<<32_PCREL_S2>> -- 32 bits, shifted 2) is used on the
1746 SPARC.  (SPARC tools generally refer to this as <<WDISP30>>.)  The
1747 signed 16-bit displacement is used on the MIPS, and the 23-bit
1748 displacement is used on the Alpha.
1749
1750 ENUM
1751   BFD_RELOC_HI22
1752 ENUMX
1753   BFD_RELOC_LO10
1754 ENUMDOC
1755   High 22 bits and low 10 bits of 32-bit value, placed into lower bits of
1756 the target word.  These are used on the SPARC.
1757
1758 ENUM
1759   BFD_RELOC_GPREL16
1760 ENUMX
1761   BFD_RELOC_GPREL32
1762 ENUMDOC
1763   For systems that allocate a Global Pointer register, these are
1764 displacements off that register.  These relocation types are
1765 handled specially, because the value the register will have is
1766 decided relatively late.
1767
1768 ENUM
1769   BFD_RELOC_I960_CALLJ
1770 ENUMDOC
1771   Reloc types used for i960/b.out.
1772
1773 ENUM
1774   BFD_RELOC_NONE
1775 ENUMX
1776   BFD_RELOC_SPARC_WDISP22
1777 ENUMX
1778   BFD_RELOC_SPARC22
1779 ENUMX
1780   BFD_RELOC_SPARC13
1781 ENUMX
1782   BFD_RELOC_SPARC_GOT10
1783 ENUMX
1784   BFD_RELOC_SPARC_GOT13
1785 ENUMX
1786   BFD_RELOC_SPARC_GOT22
1787 ENUMX
1788   BFD_RELOC_SPARC_PC10
1789 ENUMX
1790   BFD_RELOC_SPARC_PC22
1791 ENUMX
1792   BFD_RELOC_SPARC_WPLT30
1793 ENUMX
1794   BFD_RELOC_SPARC_COPY
1795 ENUMX
1796   BFD_RELOC_SPARC_GLOB_DAT
1797 ENUMX
1798   BFD_RELOC_SPARC_JMP_SLOT
1799 ENUMX
1800   BFD_RELOC_SPARC_RELATIVE
1801 ENUMX
1802   BFD_RELOC_SPARC_UA16
1803 ENUMX
1804   BFD_RELOC_SPARC_UA32
1805 ENUMX
1806   BFD_RELOC_SPARC_UA64
1807 ENUMDOC
1808   SPARC ELF relocations.  There is probably some overlap with other
1809   relocation types already defined.
1810
1811 ENUM
1812   BFD_RELOC_SPARC_BASE13
1813 ENUMX
1814   BFD_RELOC_SPARC_BASE22
1815 ENUMDOC
1816   I think these are specific to SPARC a.out (e.g., Sun 4).
1817
1818 ENUMEQ
1819   BFD_RELOC_SPARC_64
1820   BFD_RELOC_64
1821 ENUMX
1822   BFD_RELOC_SPARC_10
1823 ENUMX
1824   BFD_RELOC_SPARC_11
1825 ENUMX
1826   BFD_RELOC_SPARC_OLO10
1827 ENUMX
1828   BFD_RELOC_SPARC_HH22
1829 ENUMX
1830   BFD_RELOC_SPARC_HM10
1831 ENUMX
1832   BFD_RELOC_SPARC_LM22
1833 ENUMX
1834   BFD_RELOC_SPARC_PC_HH22
1835 ENUMX
1836   BFD_RELOC_SPARC_PC_HM10
1837 ENUMX
1838   BFD_RELOC_SPARC_PC_LM22
1839 ENUMX
1840   BFD_RELOC_SPARC_WDISP16
1841 ENUMX
1842   BFD_RELOC_SPARC_WDISP19
1843 ENUMX
1844   BFD_RELOC_SPARC_7
1845 ENUMX
1846   BFD_RELOC_SPARC_6
1847 ENUMX
1848   BFD_RELOC_SPARC_5
1849 ENUMEQX
1850   BFD_RELOC_SPARC_DISP64
1851   BFD_RELOC_64_PCREL
1852 ENUMX
1853   BFD_RELOC_SPARC_PLT32
1854 ENUMX
1855   BFD_RELOC_SPARC_PLT64
1856 ENUMX
1857   BFD_RELOC_SPARC_HIX22
1858 ENUMX
1859   BFD_RELOC_SPARC_LOX10
1860 ENUMX
1861   BFD_RELOC_SPARC_H44
1862 ENUMX
1863   BFD_RELOC_SPARC_M44
1864 ENUMX
1865   BFD_RELOC_SPARC_L44
1866 ENUMX
1867   BFD_RELOC_SPARC_REGISTER
1868 ENUMDOC
1869   SPARC64 relocations
1870
1871 ENUM
1872   BFD_RELOC_SPARC_REV32
1873 ENUMDOC
1874   SPARC little endian relocation
1875
1876 ENUM
1877   BFD_RELOC_ALPHA_GPDISP_HI16
1878 ENUMDOC
1879   Alpha ECOFF and ELF relocations.  Some of these treat the symbol or
1880      "addend" in some special way.
1881   For GPDISP_HI16 ("gpdisp") relocations, the symbol is ignored when
1882      writing; when reading, it will be the absolute section symbol.  The
1883      addend is the displacement in bytes of the "lda" instruction from
1884      the "ldah" instruction (which is at the address of this reloc).
1885 ENUM
1886   BFD_RELOC_ALPHA_GPDISP_LO16
1887 ENUMDOC
1888   For GPDISP_LO16 ("ignore") relocations, the symbol is handled as
1889      with GPDISP_HI16 relocs.  The addend is ignored when writing the
1890      relocations out, and is filled in with the file's GP value on
1891      reading, for convenience.
1892
1893 ENUM
1894   BFD_RELOC_ALPHA_GPDISP
1895 ENUMDOC
1896   The ELF GPDISP relocation is exactly the same as the GPDISP_HI16
1897      relocation except that there is no accompanying GPDISP_LO16
1898      relocation.
1899
1900 ENUM
1901   BFD_RELOC_ALPHA_LITERAL
1902 ENUMX
1903   BFD_RELOC_ALPHA_ELF_LITERAL
1904 ENUMX
1905   BFD_RELOC_ALPHA_LITUSE
1906 ENUMDOC
1907   The Alpha LITERAL/LITUSE relocs are produced by a symbol reference;
1908      the assembler turns it into a LDQ instruction to load the address of
1909      the symbol, and then fills in a register in the real instruction.
1910
1911      The LITERAL reloc, at the LDQ instruction, refers to the .lita
1912      section symbol.  The addend is ignored when writing, but is filled
1913      in with the file's GP value on reading, for convenience, as with the
1914      GPDISP_LO16 reloc.
1915
1916      The ELF_LITERAL reloc is somewhere between 16_GOTOFF and GPDISP_LO16.
1917      It should refer to the symbol to be referenced, as with 16_GOTOFF,
1918      but it generates output not based on the position within the .got
1919      section, but relative to the GP value chosen for the file during the
1920      final link stage.
1921
1922      The LITUSE reloc, on the instruction using the loaded address, gives
1923      information to the linker that it might be able to use to optimize
1924      away some literal section references.  The symbol is ignored (read
1925      as the absolute section symbol), and the "addend" indicates the type
1926      of instruction using the register:
1927               1 - "memory" fmt insn
1928               2 - byte-manipulation (byte offset reg)
1929               3 - jsr (target of branch)
1930
1931 ENUM
1932   BFD_RELOC_ALPHA_HINT
1933 ENUMDOC
1934   The HINT relocation indicates a value that should be filled into the
1935      "hint" field of a jmp/jsr/ret instruction, for possible branch-
1936      prediction logic which may be provided on some processors.
1937
1938 ENUM
1939   BFD_RELOC_ALPHA_LINKAGE
1940 ENUMDOC
1941   The LINKAGE relocation outputs a linkage pair in the object file,
1942      which is filled by the linker.
1943
1944 ENUM
1945   BFD_RELOC_ALPHA_CODEADDR
1946 ENUMDOC
1947   The CODEADDR relocation outputs a STO_CA in the object file,
1948      which is filled by the linker.
1949
1950 ENUM
1951   BFD_RELOC_ALPHA_GPREL_HI16
1952 ENUMX
1953   BFD_RELOC_ALPHA_GPREL_LO16
1954 ENUMDOC
1955   The GPREL_HI/LO relocations together form a 32-bit offset from the
1956      GP register.
1957
1958 ENUM
1959   BFD_RELOC_ALPHA_BRSGP
1960 ENUMDOC
1961   Like BFD_RELOC_23_PCREL_S2, except that the source and target must
1962   share a common GP, and the target address is adjusted for
1963   STO_ALPHA_STD_GPLOAD.
1964
1965 ENUM
1966   BFD_RELOC_MIPS_JMP
1967 ENUMDOC
1968   Bits 27..2 of the relocation address shifted right 2 bits;
1969      simple reloc otherwise.
1970
1971 ENUM
1972   BFD_RELOC_MIPS16_JMP
1973 ENUMDOC
1974   The MIPS16 jump instruction.
1975
1976 ENUM
1977   BFD_RELOC_MIPS16_GPREL
1978 ENUMDOC
1979   MIPS16 GP relative reloc.
1980
1981 ENUM
1982   BFD_RELOC_HI16
1983 ENUMDOC
1984   High 16 bits of 32-bit value; simple reloc.
1985 ENUM
1986   BFD_RELOC_HI16_S
1987 ENUMDOC
1988   High 16 bits of 32-bit value but the low 16 bits will be sign
1989      extended and added to form the final result.  If the low 16
1990      bits form a negative number, we need to add one to the high value
1991      to compensate for the borrow when the low bits are added.
1992 ENUM
1993   BFD_RELOC_LO16
1994 ENUMDOC
1995   Low 16 bits.
1996 ENUM
1997   BFD_RELOC_PCREL_HI16_S
1998 ENUMDOC
1999   Like BFD_RELOC_HI16_S, but PC relative.
2000 ENUM
2001   BFD_RELOC_PCREL_LO16
2002 ENUMDOC
2003   Like BFD_RELOC_LO16, but PC relative.
2004
2005 ENUM
2006   BFD_RELOC_MIPS_LITERAL
2007 ENUMDOC
2008   Relocation against a MIPS literal section.
2009
2010 ENUM
2011   BFD_RELOC_MIPS_GOT16
2012 ENUMX
2013   BFD_RELOC_MIPS_CALL16
2014 ENUMX
2015   BFD_RELOC_MIPS_GOT_HI16
2016 ENUMX
2017   BFD_RELOC_MIPS_GOT_LO16
2018 ENUMX
2019   BFD_RELOC_MIPS_CALL_HI16
2020 ENUMX
2021   BFD_RELOC_MIPS_CALL_LO16
2022 ENUMX
2023   BFD_RELOC_MIPS_SUB
2024 ENUMX
2025   BFD_RELOC_MIPS_GOT_PAGE
2026 ENUMX
2027   BFD_RELOC_MIPS_GOT_OFST
2028 ENUMX
2029   BFD_RELOC_MIPS_GOT_DISP
2030 ENUMX
2031   BFD_RELOC_MIPS_SHIFT5
2032 ENUMX
2033   BFD_RELOC_MIPS_SHIFT6
2034 ENUMX
2035   BFD_RELOC_MIPS_INSERT_A
2036 ENUMX
2037   BFD_RELOC_MIPS_INSERT_B
2038 ENUMX
2039   BFD_RELOC_MIPS_DELETE
2040 ENUMX
2041   BFD_RELOC_MIPS_HIGHEST
2042 ENUMX
2043   BFD_RELOC_MIPS_HIGHER
2044 ENUMX
2045   BFD_RELOC_MIPS_SCN_DISP
2046 ENUMX
2047   BFD_RELOC_MIPS_REL16
2048 ENUMX
2049   BFD_RELOC_MIPS_RELGOT
2050 ENUMX
2051   BFD_RELOC_MIPS_JALR
2052 COMMENT
2053 COMMENT
2054 ENUMDOC
2055   MIPS ELF relocations.
2056
2057 COMMENT
2058
2059 ENUM
2060   BFD_RELOC_386_GOT32
2061 ENUMX
2062   BFD_RELOC_386_PLT32
2063 ENUMX
2064   BFD_RELOC_386_COPY
2065 ENUMX
2066   BFD_RELOC_386_GLOB_DAT
2067 ENUMX
2068   BFD_RELOC_386_JUMP_SLOT
2069 ENUMX
2070   BFD_RELOC_386_RELATIVE
2071 ENUMX
2072   BFD_RELOC_386_GOTOFF
2073 ENUMX
2074   BFD_RELOC_386_GOTPC
2075 ENUMX
2076   BFD_RELOC_386_TLS_LE
2077 ENUMX
2078   BFD_RELOC_386_TLS_GD
2079 ENUMX
2080   BFD_RELOC_386_TLS_LDM
2081 ENUMX
2082   BFD_RELOC_386_TLS_LDO_32
2083 ENUMX
2084   BFD_RELOC_386_TLS_IE_32
2085 ENUMX
2086   BFD_RELOC_386_TLS_LE_32
2087 ENUMX
2088   BFD_RELOC_386_TLS_DTPMOD32
2089 ENUMX
2090   BFD_RELOC_386_TLS_DTPOFF32
2091 ENUMX
2092   BFD_RELOC_386_TLS_TPOFF32
2093 ENUMDOC
2094   i386/elf relocations
2095
2096 ENUM
2097   BFD_RELOC_X86_64_GOT32
2098 ENUMX
2099   BFD_RELOC_X86_64_PLT32
2100 ENUMX
2101   BFD_RELOC_X86_64_COPY
2102 ENUMX
2103   BFD_RELOC_X86_64_GLOB_DAT
2104 ENUMX
2105   BFD_RELOC_X86_64_JUMP_SLOT
2106 ENUMX
2107   BFD_RELOC_X86_64_RELATIVE
2108 ENUMX
2109   BFD_RELOC_X86_64_GOTPCREL
2110 ENUMX
2111   BFD_RELOC_X86_64_32S
2112 ENUMDOC
2113   x86-64/elf relocations
2114
2115 ENUM
2116   BFD_RELOC_NS32K_IMM_8
2117 ENUMX
2118   BFD_RELOC_NS32K_IMM_16
2119 ENUMX
2120   BFD_RELOC_NS32K_IMM_32
2121 ENUMX
2122   BFD_RELOC_NS32K_IMM_8_PCREL
2123 ENUMX
2124   BFD_RELOC_NS32K_IMM_16_PCREL
2125 ENUMX
2126   BFD_RELOC_NS32K_IMM_32_PCREL
2127 ENUMX
2128   BFD_RELOC_NS32K_DISP_8
2129 ENUMX
2130   BFD_RELOC_NS32K_DISP_16
2131 ENUMX
2132   BFD_RELOC_NS32K_DISP_32
2133 ENUMX
2134   BFD_RELOC_NS32K_DISP_8_PCREL
2135 ENUMX
2136   BFD_RELOC_NS32K_DISP_16_PCREL
2137 ENUMX
2138   BFD_RELOC_NS32K_DISP_32_PCREL
2139 ENUMDOC
2140   ns32k relocations
2141
2142 ENUM
2143   BFD_RELOC_PDP11_DISP_8_PCREL
2144 ENUMX
2145   BFD_RELOC_PDP11_DISP_6_PCREL
2146 ENUMDOC
2147   PDP11 relocations
2148
2149 ENUM
2150   BFD_RELOC_PJ_CODE_HI16
2151 ENUMX
2152   BFD_RELOC_PJ_CODE_LO16
2153 ENUMX
2154   BFD_RELOC_PJ_CODE_DIR16
2155 ENUMX
2156   BFD_RELOC_PJ_CODE_DIR32
2157 ENUMX
2158   BFD_RELOC_PJ_CODE_REL16
2159 ENUMX
2160   BFD_RELOC_PJ_CODE_REL32
2161 ENUMDOC
2162   Picojava relocs.  Not all of these appear in object files.
2163
2164 ENUM
2165   BFD_RELOC_PPC_B26
2166 ENUMX
2167   BFD_RELOC_PPC_BA26
2168 ENUMX
2169   BFD_RELOC_PPC_TOC16
2170 ENUMX
2171   BFD_RELOC_PPC_B16
2172 ENUMX
2173   BFD_RELOC_PPC_B16_BRTAKEN
2174 ENUMX
2175   BFD_RELOC_PPC_B16_BRNTAKEN
2176 ENUMX
2177   BFD_RELOC_PPC_BA16
2178 ENUMX
2179   BFD_RELOC_PPC_BA16_BRTAKEN
2180 ENUMX
2181   BFD_RELOC_PPC_BA16_BRNTAKEN
2182 ENUMX
2183   BFD_RELOC_PPC_COPY
2184 ENUMX
2185   BFD_RELOC_PPC_GLOB_DAT
2186 ENUMX
2187   BFD_RELOC_PPC_JMP_SLOT
2188 ENUMX
2189   BFD_RELOC_PPC_RELATIVE
2190 ENUMX
2191   BFD_RELOC_PPC_LOCAL24PC
2192 ENUMX
2193   BFD_RELOC_PPC_EMB_NADDR32
2194 ENUMX
2195   BFD_RELOC_PPC_EMB_NADDR16
2196 ENUMX
2197   BFD_RELOC_PPC_EMB_NADDR16_LO
2198 ENUMX
2199   BFD_RELOC_PPC_EMB_NADDR16_HI
2200 ENUMX
2201   BFD_RELOC_PPC_EMB_NADDR16_HA
2202 ENUMX
2203   BFD_RELOC_PPC_EMB_SDAI16
2204 ENUMX
2205   BFD_RELOC_PPC_EMB_SDA2I16
2206 ENUMX
2207   BFD_RELOC_PPC_EMB_SDA2REL
2208 ENUMX
2209   BFD_RELOC_PPC_EMB_SDA21
2210 ENUMX
2211   BFD_RELOC_PPC_EMB_MRKREF
2212 ENUMX
2213   BFD_RELOC_PPC_EMB_RELSEC16
2214 ENUMX
2215   BFD_RELOC_PPC_EMB_RELST_LO
2216 ENUMX
2217   BFD_RELOC_PPC_EMB_RELST_HI
2218 ENUMX
2219   BFD_RELOC_PPC_EMB_RELST_HA
2220 ENUMX
2221   BFD_RELOC_PPC_EMB_BIT_FLD
2222 ENUMX
2223   BFD_RELOC_PPC_EMB_RELSDA
2224 ENUMX
2225   BFD_RELOC_PPC64_HIGHER
2226 ENUMX
2227   BFD_RELOC_PPC64_HIGHER_S
2228 ENUMX
2229   BFD_RELOC_PPC64_HIGHEST
2230 ENUMX
2231   BFD_RELOC_PPC64_HIGHEST_S
2232 ENUMX
2233   BFD_RELOC_PPC64_TOC16_LO
2234 ENUMX
2235   BFD_RELOC_PPC64_TOC16_HI
2236 ENUMX
2237   BFD_RELOC_PPC64_TOC16_HA
2238 ENUMX
2239   BFD_RELOC_PPC64_TOC
2240 ENUMX
2241   BFD_RELOC_PPC64_PLTGOT16
2242 ENUMX
2243   BFD_RELOC_PPC64_PLTGOT16_LO
2244 ENUMX
2245   BFD_RELOC_PPC64_PLTGOT16_HI
2246 ENUMX
2247   BFD_RELOC_PPC64_PLTGOT16_HA
2248 ENUMX
2249   BFD_RELOC_PPC64_ADDR16_DS
2250 ENUMX
2251   BFD_RELOC_PPC64_ADDR16_LO_DS
2252 ENUMX
2253   BFD_RELOC_PPC64_GOT16_DS
2254 ENUMX
2255   BFD_RELOC_PPC64_GOT16_LO_DS
2256 ENUMX
2257   BFD_RELOC_PPC64_PLT16_LO_DS
2258 ENUMX
2259   BFD_RELOC_PPC64_SECTOFF_DS
2260 ENUMX
2261   BFD_RELOC_PPC64_SECTOFF_LO_DS
2262 ENUMX
2263   BFD_RELOC_PPC64_TOC16_DS
2264 ENUMX
2265   BFD_RELOC_PPC64_TOC16_LO_DS
2266 ENUMX
2267   BFD_RELOC_PPC64_PLTGOT16_DS
2268 ENUMX
2269   BFD_RELOC_PPC64_PLTGOT16_LO_DS
2270 ENUMDOC
2271   Power(rs6000) and PowerPC relocations.
2272
2273 ENUM
2274   BFD_RELOC_I370_D12
2275 ENUMDOC
2276   IBM 370/390 relocations
2277
2278 ENUM
2279   BFD_RELOC_CTOR
2280 ENUMDOC
2281   The type of reloc used to build a contructor table - at the moment
2282   probably a 32 bit wide absolute relocation, but the target can choose.
2283   It generally does map to one of the other relocation types.
2284
2285 ENUM
2286   BFD_RELOC_ARM_PCREL_BRANCH
2287 ENUMDOC
2288   ARM 26 bit pc-relative branch.  The lowest two bits must be zero and are
2289   not stored in the instruction.
2290 ENUM
2291   BFD_RELOC_ARM_PCREL_BLX
2292 ENUMDOC
2293   ARM 26 bit pc-relative branch.  The lowest bit must be zero and is
2294   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2295   field in the instruction.
2296 ENUM
2297   BFD_RELOC_THUMB_PCREL_BLX
2298 ENUMDOC
2299   Thumb 22 bit pc-relative branch.  The lowest bit must be zero and is
2300   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2301   field in the instruction.
2302 ENUM
2303   BFD_RELOC_ARM_IMMEDIATE
2304 ENUMX
2305   BFD_RELOC_ARM_ADRL_IMMEDIATE
2306 ENUMX
2307   BFD_RELOC_ARM_OFFSET_IMM
2308 ENUMX
2309   BFD_RELOC_ARM_SHIFT_IMM
2310 ENUMX
2311   BFD_RELOC_ARM_SWI
2312 ENUMX
2313   BFD_RELOC_ARM_MULTI
2314 ENUMX
2315   BFD_RELOC_ARM_CP_OFF_IMM
2316 ENUMX
2317   BFD_RELOC_ARM_ADR_IMM
2318 ENUMX
2319   BFD_RELOC_ARM_LDR_IMM
2320 ENUMX
2321   BFD_RELOC_ARM_LITERAL
2322 ENUMX
2323   BFD_RELOC_ARM_IN_POOL
2324 ENUMX
2325   BFD_RELOC_ARM_OFFSET_IMM8
2326 ENUMX
2327   BFD_RELOC_ARM_HWLITERAL
2328 ENUMX
2329   BFD_RELOC_ARM_THUMB_ADD
2330 ENUMX
2331   BFD_RELOC_ARM_THUMB_IMM
2332 ENUMX
2333   BFD_RELOC_ARM_THUMB_SHIFT
2334 ENUMX
2335   BFD_RELOC_ARM_THUMB_OFFSET
2336 ENUMX
2337   BFD_RELOC_ARM_GOT12
2338 ENUMX
2339   BFD_RELOC_ARM_GOT32
2340 ENUMX
2341   BFD_RELOC_ARM_JUMP_SLOT
2342 ENUMX
2343   BFD_RELOC_ARM_COPY
2344 ENUMX
2345   BFD_RELOC_ARM_GLOB_DAT
2346 ENUMX
2347   BFD_RELOC_ARM_PLT32
2348 ENUMX
2349   BFD_RELOC_ARM_RELATIVE
2350 ENUMX
2351   BFD_RELOC_ARM_GOTOFF
2352 ENUMX
2353   BFD_RELOC_ARM_GOTPC
2354 ENUMDOC
2355   These relocs are only used within the ARM assembler.  They are not
2356   (at present) written to any object files.
2357
2358 ENUM
2359   BFD_RELOC_SH_PCDISP8BY2
2360 ENUMX
2361   BFD_RELOC_SH_PCDISP12BY2
2362 ENUMX
2363   BFD_RELOC_SH_IMM4
2364 ENUMX
2365   BFD_RELOC_SH_IMM4BY2
2366 ENUMX
2367   BFD_RELOC_SH_IMM4BY4
2368 ENUMX
2369   BFD_RELOC_SH_IMM8
2370 ENUMX
2371   BFD_RELOC_SH_IMM8BY2
2372 ENUMX
2373   BFD_RELOC_SH_IMM8BY4
2374 ENUMX
2375   BFD_RELOC_SH_PCRELIMM8BY2
2376 ENUMX
2377   BFD_RELOC_SH_PCRELIMM8BY4
2378 ENUMX
2379   BFD_RELOC_SH_SWITCH16
2380 ENUMX
2381   BFD_RELOC_SH_SWITCH32
2382 ENUMX
2383   BFD_RELOC_SH_USES
2384 ENUMX
2385   BFD_RELOC_SH_COUNT
2386 ENUMX
2387   BFD_RELOC_SH_ALIGN
2388 ENUMX
2389   BFD_RELOC_SH_CODE
2390 ENUMX
2391   BFD_RELOC_SH_DATA
2392 ENUMX
2393   BFD_RELOC_SH_LABEL
2394 ENUMX
2395   BFD_RELOC_SH_LOOP_START
2396 ENUMX
2397   BFD_RELOC_SH_LOOP_END
2398 ENUMX
2399   BFD_RELOC_SH_COPY
2400 ENUMX
2401   BFD_RELOC_SH_GLOB_DAT
2402 ENUMX
2403   BFD_RELOC_SH_JMP_SLOT
2404 ENUMX
2405   BFD_RELOC_SH_RELATIVE
2406 ENUMX
2407   BFD_RELOC_SH_GOTPC
2408 ENUMX
2409   BFD_RELOC_SH_GOT_LOW16
2410 ENUMX
2411   BFD_RELOC_SH_GOT_MEDLOW16
2412 ENUMX
2413   BFD_RELOC_SH_GOT_MEDHI16
2414 ENUMX
2415   BFD_RELOC_SH_GOT_HI16
2416 ENUMX
2417   BFD_RELOC_SH_GOTPLT_LOW16
2418 ENUMX
2419   BFD_RELOC_SH_GOTPLT_MEDLOW16
2420 ENUMX
2421   BFD_RELOC_SH_GOTPLT_MEDHI16
2422 ENUMX
2423   BFD_RELOC_SH_GOTPLT_HI16
2424 ENUMX
2425   BFD_RELOC_SH_PLT_LOW16
2426 ENUMX
2427   BFD_RELOC_SH_PLT_MEDLOW16
2428 ENUMX
2429   BFD_RELOC_SH_PLT_MEDHI16
2430 ENUMX
2431   BFD_RELOC_SH_PLT_HI16
2432 ENUMX
2433   BFD_RELOC_SH_GOTOFF_LOW16
2434 ENUMX
2435   BFD_RELOC_SH_GOTOFF_MEDLOW16
2436 ENUMX
2437   BFD_RELOC_SH_GOTOFF_MEDHI16
2438 ENUMX
2439   BFD_RELOC_SH_GOTOFF_HI16
2440 ENUMX
2441   BFD_RELOC_SH_GOTPC_LOW16
2442 ENUMX
2443   BFD_RELOC_SH_GOTPC_MEDLOW16
2444 ENUMX
2445   BFD_RELOC_SH_GOTPC_MEDHI16
2446 ENUMX
2447   BFD_RELOC_SH_GOTPC_HI16
2448 ENUMX
2449   BFD_RELOC_SH_COPY64
2450 ENUMX
2451   BFD_RELOC_SH_GLOB_DAT64
2452 ENUMX
2453   BFD_RELOC_SH_JMP_SLOT64
2454 ENUMX
2455   BFD_RELOC_SH_RELATIVE64
2456 ENUMX
2457   BFD_RELOC_SH_GOT10BY4
2458 ENUMX
2459   BFD_RELOC_SH_GOT10BY8
2460 ENUMX
2461   BFD_RELOC_SH_GOTPLT10BY4
2462 ENUMX
2463   BFD_RELOC_SH_GOTPLT10BY8
2464 ENUMX
2465   BFD_RELOC_SH_GOTPLT32
2466 ENUMX
2467   BFD_RELOC_SH_SHMEDIA_CODE
2468 ENUMX
2469   BFD_RELOC_SH_IMMU5
2470 ENUMX
2471   BFD_RELOC_SH_IMMS6
2472 ENUMX
2473   BFD_RELOC_SH_IMMS6BY32
2474 ENUMX
2475   BFD_RELOC_SH_IMMU6
2476 ENUMX
2477   BFD_RELOC_SH_IMMS10
2478 ENUMX
2479   BFD_RELOC_SH_IMMS10BY2
2480 ENUMX
2481   BFD_RELOC_SH_IMMS10BY4
2482 ENUMX
2483   BFD_RELOC_SH_IMMS10BY8
2484 ENUMX
2485   BFD_RELOC_SH_IMMS16
2486 ENUMX
2487   BFD_RELOC_SH_IMMU16
2488 ENUMX
2489   BFD_RELOC_SH_IMM_LOW16
2490 ENUMX
2491   BFD_RELOC_SH_IMM_LOW16_PCREL
2492 ENUMX
2493   BFD_RELOC_SH_IMM_MEDLOW16
2494 ENUMX
2495   BFD_RELOC_SH_IMM_MEDLOW16_PCREL
2496 ENUMX
2497   BFD_RELOC_SH_IMM_MEDHI16
2498 ENUMX
2499   BFD_RELOC_SH_IMM_MEDHI16_PCREL
2500 ENUMX
2501   BFD_RELOC_SH_IMM_HI16
2502 ENUMX
2503   BFD_RELOC_SH_IMM_HI16_PCREL
2504 ENUMX
2505   BFD_RELOC_SH_PT_16
2506 ENUMDOC
2507   Hitachi SH relocs.  Not all of these appear in object files.
2508
2509 ENUM
2510   BFD_RELOC_THUMB_PCREL_BRANCH9
2511 ENUMX
2512   BFD_RELOC_THUMB_PCREL_BRANCH12
2513 ENUMX
2514   BFD_RELOC_THUMB_PCREL_BRANCH23
2515 ENUMDOC
2516   Thumb 23-, 12- and 9-bit pc-relative branches.  The lowest bit must
2517   be zero and is not stored in the instruction.
2518
2519 ENUM
2520   BFD_RELOC_ARC_B22_PCREL
2521 ENUMDOC
2522   ARC Cores relocs.
2523   ARC 22 bit pc-relative branch.  The lowest two bits must be zero and are
2524   not stored in the instruction.  The high 20 bits are installed in bits 26
2525   through 7 of the instruction.
2526 ENUM
2527   BFD_RELOC_ARC_B26
2528 ENUMDOC
2529   ARC 26 bit absolute branch.  The lowest two bits must be zero and are not
2530   stored in the instruction.  The high 24 bits are installed in bits 23
2531   through 0.
2532
2533 ENUM
2534   BFD_RELOC_D10V_10_PCREL_R
2535 ENUMDOC
2536   Mitsubishi D10V relocs.
2537   This is a 10-bit reloc with the right 2 bits
2538   assumed to be 0.
2539 ENUM
2540   BFD_RELOC_D10V_10_PCREL_L
2541 ENUMDOC
2542   Mitsubishi D10V relocs.
2543   This is a 10-bit reloc with the right 2 bits
2544   assumed to be 0.  This is the same as the previous reloc
2545   except it is in the left container, i.e.,
2546   shifted left 15 bits.
2547 ENUM
2548   BFD_RELOC_D10V_18
2549 ENUMDOC
2550   This is an 18-bit reloc with the right 2 bits
2551   assumed to be 0.
2552 ENUM
2553   BFD_RELOC_D10V_18_PCREL
2554 ENUMDOC
2555   This is an 18-bit reloc with the right 2 bits
2556   assumed to be 0.
2557
2558 ENUM
2559   BFD_RELOC_D30V_6
2560 ENUMDOC
2561   Mitsubishi D30V relocs.
2562   This is a 6-bit absolute reloc.
2563 ENUM
2564   BFD_RELOC_D30V_9_PCREL
2565 ENUMDOC
2566   This is a 6-bit pc-relative reloc with
2567   the right 3 bits assumed to be 0.
2568 ENUM
2569   BFD_RELOC_D30V_9_PCREL_R
2570 ENUMDOC
2571   This is a 6-bit pc-relative reloc with
2572   the right 3 bits assumed to be 0. Same
2573   as the previous reloc but on the right side
2574   of the container.
2575 ENUM
2576   BFD_RELOC_D30V_15
2577 ENUMDOC
2578   This is a 12-bit absolute reloc with the
2579   right 3 bitsassumed to be 0.
2580 ENUM
2581   BFD_RELOC_D30V_15_PCREL
2582 ENUMDOC
2583   This is a 12-bit pc-relative reloc with
2584   the right 3 bits assumed to be 0.
2585 ENUM
2586   BFD_RELOC_D30V_15_PCREL_R
2587 ENUMDOC
2588   This is a 12-bit pc-relative reloc with
2589   the right 3 bits assumed to be 0. Same
2590   as the previous reloc but on the right side
2591   of the container.
2592 ENUM
2593   BFD_RELOC_D30V_21
2594 ENUMDOC
2595   This is an 18-bit absolute reloc with
2596   the right 3 bits assumed to be 0.
2597 ENUM
2598   BFD_RELOC_D30V_21_PCREL
2599 ENUMDOC
2600   This is an 18-bit pc-relative reloc with
2601   the right 3 bits assumed to be 0.
2602 ENUM
2603   BFD_RELOC_D30V_21_PCREL_R
2604 ENUMDOC
2605   This is an 18-bit pc-relative reloc with
2606   the right 3 bits assumed to be 0. Same
2607   as the previous reloc but on the right side
2608   of the container.
2609 ENUM
2610   BFD_RELOC_D30V_32
2611 ENUMDOC
2612   This is a 32-bit absolute reloc.
2613 ENUM
2614   BFD_RELOC_D30V_32_PCREL
2615 ENUMDOC
2616   This is a 32-bit pc-relative reloc.
2617
2618 ENUM
2619   BFD_RELOC_M32R_24
2620 ENUMDOC
2621   Mitsubishi M32R relocs.
2622   This is a 24 bit absolute address.
2623 ENUM
2624   BFD_RELOC_M32R_10_PCREL
2625 ENUMDOC
2626   This is a 10-bit pc-relative reloc with the right 2 bits assumed to be 0.
2627 ENUM
2628   BFD_RELOC_M32R_18_PCREL
2629 ENUMDOC
2630   This is an 18-bit reloc with the right 2 bits assumed to be 0.
2631 ENUM
2632   BFD_RELOC_M32R_26_PCREL
2633 ENUMDOC
2634   This is a 26-bit reloc with the right 2 bits assumed to be 0.
2635 ENUM
2636   BFD_RELOC_M32R_HI16_ULO
2637 ENUMDOC
2638   This is a 16-bit reloc containing the high 16 bits of an address
2639   used when the lower 16 bits are treated as unsigned.
2640 ENUM
2641   BFD_RELOC_M32R_HI16_SLO
2642 ENUMDOC
2643   This is a 16-bit reloc containing the high 16 bits of an address
2644   used when the lower 16 bits are treated as signed.
2645 ENUM
2646   BFD_RELOC_M32R_LO16
2647 ENUMDOC
2648   This is a 16-bit reloc containing the lower 16 bits of an address.
2649 ENUM
2650   BFD_RELOC_M32R_SDA16
2651 ENUMDOC
2652   This is a 16-bit reloc containing the small data area offset for use in
2653   add3, load, and store instructions.
2654
2655 ENUM
2656   BFD_RELOC_V850_9_PCREL
2657 ENUMDOC
2658   This is a 9-bit reloc
2659 ENUM
2660   BFD_RELOC_V850_22_PCREL
2661 ENUMDOC
2662   This is a 22-bit reloc
2663
2664 ENUM
2665   BFD_RELOC_V850_SDA_16_16_OFFSET
2666 ENUMDOC
2667   This is a 16 bit offset from the short data area pointer.
2668 ENUM
2669   BFD_RELOC_V850_SDA_15_16_OFFSET
2670 ENUMDOC
2671   This is a 16 bit offset (of which only 15 bits are used) from the
2672   short data area pointer.
2673 ENUM
2674   BFD_RELOC_V850_ZDA_16_16_OFFSET
2675 ENUMDOC
2676   This is a 16 bit offset from the zero data area pointer.
2677 ENUM
2678   BFD_RELOC_V850_ZDA_15_16_OFFSET
2679 ENUMDOC
2680   This is a 16 bit offset (of which only 15 bits are used) from the
2681   zero data area pointer.
2682 ENUM
2683   BFD_RELOC_V850_TDA_6_8_OFFSET
2684 ENUMDOC
2685   This is an 8 bit offset (of which only 6 bits are used) from the
2686   tiny data area pointer.
2687 ENUM
2688   BFD_RELOC_V850_TDA_7_8_OFFSET
2689 ENUMDOC
2690   This is an 8bit offset (of which only 7 bits are used) from the tiny
2691   data area pointer.
2692 ENUM
2693   BFD_RELOC_V850_TDA_7_7_OFFSET
2694 ENUMDOC
2695   This is a 7 bit offset from the tiny data area pointer.
2696 ENUM
2697   BFD_RELOC_V850_TDA_16_16_OFFSET
2698 ENUMDOC
2699   This is a 16 bit offset from the tiny data area pointer.
2700 COMMENT
2701 ENUM
2702   BFD_RELOC_V850_TDA_4_5_OFFSET
2703 ENUMDOC
2704   This is a 5 bit offset (of which only 4 bits are used) from the tiny
2705   data area pointer.
2706 ENUM
2707   BFD_RELOC_V850_TDA_4_4_OFFSET
2708 ENUMDOC
2709   This is a 4 bit offset from the tiny data area pointer.
2710 ENUM
2711   BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET
2712 ENUMDOC
2713   This is a 16 bit offset from the short data area pointer, with the
2714   bits placed non-contigously in the instruction.
2715 ENUM
2716   BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET
2717 ENUMDOC
2718   This is a 16 bit offset from the zero data area pointer, with the
2719   bits placed non-contigously in the instruction.
2720 ENUM
2721   BFD_RELOC_V850_CALLT_6_7_OFFSET
2722 ENUMDOC
2723   This is a 6 bit offset from the call table base pointer.
2724 ENUM
2725   BFD_RELOC_V850_CALLT_16_16_OFFSET
2726 ENUMDOC
2727   This is a 16 bit offset from the call table base pointer.
2728 COMMENT
2729
2730 ENUM
2731   BFD_RELOC_MN10300_32_PCREL
2732 ENUMDOC
2733   This is a 32bit pcrel reloc for the mn10300, offset by two bytes in the
2734   instruction.
2735 ENUM
2736   BFD_RELOC_MN10300_16_PCREL
2737 ENUMDOC
2738   This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the
2739   instruction.
2740
2741 ENUM
2742   BFD_RELOC_TIC30_LDP
2743 ENUMDOC
2744   This is a 8bit DP reloc for the tms320c30, where the most
2745   significant 8 bits of a 24 bit word are placed into the least
2746   significant 8 bits of the opcode.
2747
2748 ENUM
2749   BFD_RELOC_TIC54X_PARTLS7
2750 ENUMDOC
2751   This is a 7bit reloc for the tms320c54x, where the least
2752   significant 7 bits of a 16 bit word are placed into the least
2753   significant 7 bits of the opcode.
2754
2755 ENUM
2756   BFD_RELOC_TIC54X_PARTMS9
2757 ENUMDOC
2758   This is a 9bit DP reloc for the tms320c54x, where the most
2759   significant 9 bits of a 16 bit word are placed into the least
2760   significant 9 bits of the opcode.
2761
2762 ENUM
2763   BFD_RELOC_TIC54X_23
2764 ENUMDOC
2765   This is an extended address 23-bit reloc for the tms320c54x.
2766
2767 ENUM
2768   BFD_RELOC_TIC54X_16_OF_23
2769 ENUMDOC
2770   This is a 16-bit reloc for the tms320c54x, where the least
2771   significant 16 bits of a 23-bit extended address are placed into
2772   the opcode.
2773
2774 ENUM
2775   BFD_RELOC_TIC54X_MS7_OF_23
2776 ENUMDOC
2777   This is a reloc for the tms320c54x, where the most
2778   significant 7 bits of a 23-bit extended address are placed into
2779   the opcode.
2780
2781 ENUM
2782   BFD_RELOC_FR30_48
2783 ENUMDOC
2784   This is a 48 bit reloc for the FR30 that stores 32 bits.
2785 ENUM
2786   BFD_RELOC_FR30_20
2787 ENUMDOC
2788   This is a 32 bit reloc for the FR30 that stores 20 bits split up into
2789   two sections.
2790 ENUM
2791   BFD_RELOC_FR30_6_IN_4
2792 ENUMDOC
2793   This is a 16 bit reloc for the FR30 that stores a 6 bit word offset in
2794   4 bits.
2795 ENUM
2796   BFD_RELOC_FR30_8_IN_8
2797 ENUMDOC
2798   This is a 16 bit reloc for the FR30 that stores an 8 bit byte offset
2799   into 8 bits.
2800 ENUM
2801   BFD_RELOC_FR30_9_IN_8
2802 ENUMDOC
2803   This is a 16 bit reloc for the FR30 that stores a 9 bit short offset
2804   into 8 bits.
2805 ENUM
2806   BFD_RELOC_FR30_10_IN_8
2807 ENUMDOC
2808   This is a 16 bit reloc for the FR30 that stores a 10 bit word offset
2809   into 8 bits.
2810 ENUM
2811   BFD_RELOC_FR30_9_PCREL
2812 ENUMDOC
2813   This is a 16 bit reloc for the FR30 that stores a 9 bit pc relative
2814   short offset into 8 bits.
2815 ENUM
2816   BFD_RELOC_FR30_12_PCREL
2817 ENUMDOC
2818   This is a 16 bit reloc for the FR30 that stores a 12 bit pc relative
2819   short offset into 11 bits.
2820
2821 ENUM
2822   BFD_RELOC_MCORE_PCREL_IMM8BY4
2823 ENUMX
2824   BFD_RELOC_MCORE_PCREL_IMM11BY2
2825 ENUMX
2826   BFD_RELOC_MCORE_PCREL_IMM4BY2
2827 ENUMX
2828   BFD_RELOC_MCORE_PCREL_32
2829 ENUMX
2830   BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2
2831 ENUMX
2832   BFD_RELOC_MCORE_RVA
2833 ENUMDOC
2834   Motorola Mcore relocations.
2835
2836 ENUM
2837   BFD_RELOC_MMIX_GETA
2838 ENUMX
2839   BFD_RELOC_MMIX_GETA_1
2840 ENUMX
2841   BFD_RELOC_MMIX_GETA_2
2842 ENUMX
2843   BFD_RELOC_MMIX_GETA_3
2844 ENUMDOC
2845   These are relocations for the GETA instruction.
2846 ENUM
2847   BFD_RELOC_MMIX_CBRANCH
2848 ENUMX
2849   BFD_RELOC_MMIX_CBRANCH_J
2850 ENUMX
2851   BFD_RELOC_MMIX_CBRANCH_1
2852 ENUMX
2853   BFD_RELOC_MMIX_CBRANCH_2
2854 ENUMX
2855   BFD_RELOC_MMIX_CBRANCH_3
2856 ENUMDOC
2857   These are relocations for a conditional branch instruction.
2858 ENUM
2859   BFD_RELOC_MMIX_PUSHJ
2860 ENUMX
2861   BFD_RELOC_MMIX_PUSHJ_1
2862 ENUMX
2863   BFD_RELOC_MMIX_PUSHJ_2
2864 ENUMX
2865   BFD_RELOC_MMIX_PUSHJ_3
2866 ENUMDOC
2867   These are relocations for the PUSHJ instruction.
2868 ENUM
2869   BFD_RELOC_MMIX_JMP
2870 ENUMX
2871   BFD_RELOC_MMIX_JMP_1
2872 ENUMX
2873   BFD_RELOC_MMIX_JMP_2
2874 ENUMX
2875   BFD_RELOC_MMIX_JMP_3
2876 ENUMDOC
2877   These are relocations for the JMP instruction.
2878 ENUM
2879   BFD_RELOC_MMIX_ADDR19
2880 ENUMDOC
2881   This is a relocation for a relative address as in a GETA instruction or
2882   a branch.
2883 ENUM
2884   BFD_RELOC_MMIX_ADDR27
2885 ENUMDOC
2886   This is a relocation for a relative address as in a JMP instruction.
2887 ENUM
2888   BFD_RELOC_MMIX_REG_OR_BYTE
2889 ENUMDOC
2890   This is a relocation for an instruction field that may be a general
2891   register or a value 0..255.
2892 ENUM
2893   BFD_RELOC_MMIX_REG
2894 ENUMDOC
2895   This is a relocation for an instruction field that may be a general
2896   register.
2897 ENUM
2898   BFD_RELOC_MMIX_BASE_PLUS_OFFSET
2899 ENUMDOC
2900   This is a relocation for two instruction fields holding a register and
2901   an offset, the equivalent of the relocation.
2902 ENUM
2903   BFD_RELOC_MMIX_LOCAL
2904 ENUMDOC
2905   This relocation is an assertion that the expression is not allocated as
2906   a global register.  It does not modify contents.
2907
2908 ENUM
2909   BFD_RELOC_AVR_7_PCREL
2910 ENUMDOC
2911   This is a 16 bit reloc for the AVR that stores 8 bit pc relative
2912   short offset into 7 bits.
2913 ENUM
2914   BFD_RELOC_AVR_13_PCREL
2915 ENUMDOC
2916   This is a 16 bit reloc for the AVR that stores 13 bit pc relative
2917   short offset into 12 bits.
2918 ENUM
2919   BFD_RELOC_AVR_16_PM
2920 ENUMDOC
2921   This is a 16 bit reloc for the AVR that stores 17 bit value (usually
2922   program memory address) into 16 bits.
2923 ENUM
2924   BFD_RELOC_AVR_LO8_LDI
2925 ENUMDOC
2926   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
2927   data memory address) into 8 bit immediate value of LDI insn.
2928 ENUM
2929   BFD_RELOC_AVR_HI8_LDI
2930 ENUMDOC
2931   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
2932   of data memory address) into 8 bit immediate value of LDI insn.
2933 ENUM
2934   BFD_RELOC_AVR_HH8_LDI
2935 ENUMDOC
2936   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
2937   of program memory address) into 8 bit immediate value of LDI insn.
2938 ENUM
2939   BFD_RELOC_AVR_LO8_LDI_NEG
2940 ENUMDOC
2941   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2942   (usually data memory address) into 8 bit immediate value of SUBI insn.
2943 ENUM
2944   BFD_RELOC_AVR_HI8_LDI_NEG
2945 ENUMDOC
2946   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2947   (high 8 bit of data memory address) into 8 bit immediate value of
2948   SUBI insn.
2949 ENUM
2950   BFD_RELOC_AVR_HH8_LDI_NEG
2951 ENUMDOC
2952   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2953   (most high 8 bit of program memory address) into 8 bit immediate value
2954   of LDI or SUBI insn.
2955 ENUM
2956   BFD_RELOC_AVR_LO8_LDI_PM
2957 ENUMDOC
2958   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
2959   command address) into 8 bit immediate value of LDI insn.
2960 ENUM
2961   BFD_RELOC_AVR_HI8_LDI_PM
2962 ENUMDOC
2963   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
2964   of command address) into 8 bit immediate value of LDI insn.
2965 ENUM
2966   BFD_RELOC_AVR_HH8_LDI_PM
2967 ENUMDOC
2968   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
2969   of command address) into 8 bit immediate value of LDI insn.
2970 ENUM
2971   BFD_RELOC_AVR_LO8_LDI_PM_NEG
2972 ENUMDOC
2973   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2974   (usually command address) into 8 bit immediate value of SUBI insn.
2975 ENUM
2976   BFD_RELOC_AVR_HI8_LDI_PM_NEG
2977 ENUMDOC
2978   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2979   (high 8 bit of 16 bit command address) into 8 bit immediate value
2980   of SUBI insn.
2981 ENUM
2982   BFD_RELOC_AVR_HH8_LDI_PM_NEG
2983 ENUMDOC
2984   This is a 16 bit reloc for the AVR that stores negated 8 bit value
2985   (high 6 bit of 22 bit command address) into 8 bit immediate
2986   value of SUBI insn.
2987 ENUM
2988   BFD_RELOC_AVR_CALL
2989 ENUMDOC
2990   This is a 32 bit reloc for the AVR that stores 23 bit value
2991   into 22 bits.
2992
2993 ENUM
2994   BFD_RELOC_390_12
2995 ENUMDOC
2996    Direct 12 bit.
2997 ENUM
2998   BFD_RELOC_390_GOT12
2999 ENUMDOC
3000   12 bit GOT offset.
3001 ENUM
3002   BFD_RELOC_390_PLT32
3003 ENUMDOC
3004   32 bit PC relative PLT address.
3005 ENUM
3006   BFD_RELOC_390_COPY
3007 ENUMDOC
3008   Copy symbol at runtime.
3009 ENUM
3010   BFD_RELOC_390_GLOB_DAT
3011 ENUMDOC
3012   Create GOT entry.
3013 ENUM
3014   BFD_RELOC_390_JMP_SLOT
3015 ENUMDOC
3016   Create PLT entry.
3017 ENUM
3018   BFD_RELOC_390_RELATIVE
3019 ENUMDOC
3020   Adjust by program base.
3021 ENUM
3022   BFD_RELOC_390_GOTPC
3023 ENUMDOC
3024   32 bit PC relative offset to GOT.
3025 ENUM
3026   BFD_RELOC_390_GOT16
3027 ENUMDOC
3028   16 bit GOT offset.
3029 ENUM
3030   BFD_RELOC_390_PC16DBL
3031 ENUMDOC
3032   PC relative 16 bit shifted by 1.
3033 ENUM
3034   BFD_RELOC_390_PLT16DBL
3035 ENUMDOC
3036   16 bit PC rel. PLT shifted by 1.
3037 ENUM
3038   BFD_RELOC_390_PC32DBL
3039 ENUMDOC
3040   PC relative 32 bit shifted by 1.
3041 ENUM
3042   BFD_RELOC_390_PLT32DBL
3043 ENUMDOC
3044   32 bit PC rel. PLT shifted by 1.
3045 ENUM
3046   BFD_RELOC_390_GOTPCDBL
3047 ENUMDOC
3048   32 bit PC rel. GOT shifted by 1.
3049 ENUM
3050   BFD_RELOC_390_GOT64
3051 ENUMDOC
3052   64 bit GOT offset.
3053 ENUM
3054   BFD_RELOC_390_PLT64
3055 ENUMDOC
3056   64 bit PC relative PLT address.
3057 ENUM
3058   BFD_RELOC_390_GOTENT
3059 ENUMDOC
3060   32 bit rel. offset to GOT entry.
3061
3062 ENUM
3063   BFD_RELOC_VTABLE_INHERIT
3064 ENUMX
3065   BFD_RELOC_VTABLE_ENTRY
3066 ENUMDOC
3067   These two relocations are used by the linker to determine which of
3068   the entries in a C++ virtual function table are actually used.  When
3069   the --gc-sections option is given, the linker will zero out the entries
3070   that are not used, so that the code for those functions need not be
3071   included in the output.
3072
3073   VTABLE_INHERIT is a zero-space relocation used to describe to the
3074   linker the inheritence tree of a C++ virtual function table.  The
3075   relocation's symbol should be the parent class' vtable, and the
3076   relocation should be located at the child vtable.
3077
3078   VTABLE_ENTRY is a zero-space relocation that describes the use of a
3079   virtual function table entry.  The reloc's symbol should refer to the
3080   table of the class mentioned in the code.  Off of that base, an offset
3081   describes the entry that is being used.  For Rela hosts, this offset
3082   is stored in the reloc's addend.  For Rel hosts, we are forced to put
3083   this offset in the reloc's section offset.
3084
3085 ENUM
3086   BFD_RELOC_IA64_IMM14
3087 ENUMX
3088   BFD_RELOC_IA64_IMM22
3089 ENUMX
3090   BFD_RELOC_IA64_IMM64
3091 ENUMX
3092   BFD_RELOC_IA64_DIR32MSB
3093 ENUMX
3094   BFD_RELOC_IA64_DIR32LSB
3095 ENUMX
3096   BFD_RELOC_IA64_DIR64MSB
3097 ENUMX
3098   BFD_RELOC_IA64_DIR64LSB
3099 ENUMX
3100   BFD_RELOC_IA64_GPREL22
3101 ENUMX
3102   BFD_RELOC_IA64_GPREL64I
3103 ENUMX
3104   BFD_RELOC_IA64_GPREL32MSB
3105 ENUMX
3106   BFD_RELOC_IA64_GPREL32LSB
3107 ENUMX
3108   BFD_RELOC_IA64_GPREL64MSB
3109 ENUMX
3110   BFD_RELOC_IA64_GPREL64LSB
3111 ENUMX
3112   BFD_RELOC_IA64_LTOFF22
3113 ENUMX
3114   BFD_RELOC_IA64_LTOFF64I
3115 ENUMX
3116   BFD_RELOC_IA64_PLTOFF22
3117 ENUMX
3118   BFD_RELOC_IA64_PLTOFF64I
3119 ENUMX
3120   BFD_RELOC_IA64_PLTOFF64MSB
3121 ENUMX
3122   BFD_RELOC_IA64_PLTOFF64LSB
3123 ENUMX
3124   BFD_RELOC_IA64_FPTR64I
3125 ENUMX
3126   BFD_RELOC_IA64_FPTR32MSB
3127 ENUMX
3128   BFD_RELOC_IA64_FPTR32LSB
3129 ENUMX
3130   BFD_RELOC_IA64_FPTR64MSB
3131 ENUMX
3132   BFD_RELOC_IA64_FPTR64LSB
3133 ENUMX
3134   BFD_RELOC_IA64_PCREL21B
3135 ENUMX
3136   BFD_RELOC_IA64_PCREL21BI
3137 ENUMX
3138   BFD_RELOC_IA64_PCREL21M
3139 ENUMX
3140   BFD_RELOC_IA64_PCREL21F
3141 ENUMX
3142   BFD_RELOC_IA64_PCREL22
3143 ENUMX
3144   BFD_RELOC_IA64_PCREL60B
3145 ENUMX
3146   BFD_RELOC_IA64_PCREL64I
3147 ENUMX
3148   BFD_RELOC_IA64_PCREL32MSB
3149 ENUMX
3150   BFD_RELOC_IA64_PCREL32LSB
3151 ENUMX
3152   BFD_RELOC_IA64_PCREL64MSB
3153 ENUMX
3154   BFD_RELOC_IA64_PCREL64LSB
3155 ENUMX
3156   BFD_RELOC_IA64_LTOFF_FPTR22
3157 ENUMX
3158   BFD_RELOC_IA64_LTOFF_FPTR64I
3159 ENUMX
3160   BFD_RELOC_IA64_LTOFF_FPTR32MSB
3161 ENUMX
3162   BFD_RELOC_IA64_LTOFF_FPTR32LSB
3163 ENUMX
3164   BFD_RELOC_IA64_LTOFF_FPTR64MSB
3165 ENUMX
3166   BFD_RELOC_IA64_LTOFF_FPTR64LSB
3167 ENUMX
3168   BFD_RELOC_IA64_SEGREL32MSB
3169 ENUMX
3170   BFD_RELOC_IA64_SEGREL32LSB
3171 ENUMX
3172   BFD_RELOC_IA64_SEGREL64MSB
3173 ENUMX
3174   BFD_RELOC_IA64_SEGREL64LSB
3175 ENUMX
3176   BFD_RELOC_IA64_SECREL32MSB
3177 ENUMX
3178   BFD_RELOC_IA64_SECREL32LSB
3179 ENUMX
3180   BFD_RELOC_IA64_SECREL64MSB
3181 ENUMX
3182   BFD_RELOC_IA64_SECREL64LSB
3183 ENUMX
3184   BFD_RELOC_IA64_REL32MSB
3185 ENUMX
3186   BFD_RELOC_IA64_REL32LSB
3187 ENUMX
3188   BFD_RELOC_IA64_REL64MSB
3189 ENUMX
3190   BFD_RELOC_IA64_REL64LSB
3191 ENUMX
3192   BFD_RELOC_IA64_LTV32MSB
3193 ENUMX
3194   BFD_RELOC_IA64_LTV32LSB
3195 ENUMX
3196   BFD_RELOC_IA64_LTV64MSB
3197 ENUMX
3198   BFD_RELOC_IA64_LTV64LSB
3199 ENUMX
3200   BFD_RELOC_IA64_IPLTMSB
3201 ENUMX
3202   BFD_RELOC_IA64_IPLTLSB
3203 ENUMX
3204   BFD_RELOC_IA64_COPY
3205 ENUMX
3206   BFD_RELOC_IA64_LTOFF22X
3207 ENUMX
3208   BFD_RELOC_IA64_LDXMOV
3209 ENUMX
3210   BFD_RELOC_IA64_TPREL14
3211 ENUMX
3212   BFD_RELOC_IA64_TPREL22
3213 ENUMX
3214   BFD_RELOC_IA64_TPREL64I
3215 ENUMX
3216   BFD_RELOC_IA64_TPREL64MSB
3217 ENUMX
3218   BFD_RELOC_IA64_TPREL64LSB
3219 ENUMX
3220   BFD_RELOC_IA64_LTOFF_TPREL22
3221 ENUMX
3222   BFD_RELOC_IA64_DTPMOD64MSB
3223 ENUMX
3224   BFD_RELOC_IA64_DTPMOD64LSB
3225 ENUMX
3226   BFD_RELOC_IA64_LTOFF_DTPMOD22
3227 ENUMX
3228   BFD_RELOC_IA64_DTPREL14
3229 ENUMX
3230   BFD_RELOC_IA64_DTPREL22
3231 ENUMX
3232   BFD_RELOC_IA64_DTPREL64I
3233 ENUMX
3234   BFD_RELOC_IA64_DTPREL32MSB
3235 ENUMX
3236   BFD_RELOC_IA64_DTPREL32LSB
3237 ENUMX
3238   BFD_RELOC_IA64_DTPREL64MSB
3239 ENUMX
3240   BFD_RELOC_IA64_DTPREL64LSB
3241 ENUMX
3242   BFD_RELOC_IA64_LTOFF_DTPREL22
3243 ENUMDOC
3244   Intel IA64 Relocations.
3245
3246 ENUM
3247   BFD_RELOC_M68HC11_HI8
3248 ENUMDOC
3249   Motorola 68HC11 reloc.
3250   This is the 8 bits high part of an absolute address.
3251 ENUM
3252   BFD_RELOC_M68HC11_LO8
3253 ENUMDOC
3254   Motorola 68HC11 reloc.
3255   This is the 8 bits low part of an absolute address.
3256 ENUM
3257   BFD_RELOC_M68HC11_3B
3258 ENUMDOC
3259   Motorola 68HC11 reloc.
3260   This is the 3 bits of a value.
3261
3262 ENUM
3263   BFD_RELOC_CRIS_BDISP8
3264 ENUMX
3265   BFD_RELOC_CRIS_UNSIGNED_5
3266 ENUMX
3267   BFD_RELOC_CRIS_SIGNED_6
3268 ENUMX
3269   BFD_RELOC_CRIS_UNSIGNED_6
3270 ENUMX
3271   BFD_RELOC_CRIS_UNSIGNED_4
3272 ENUMDOC
3273   These relocs are only used within the CRIS assembler.  They are not
3274   (at present) written to any object files.
3275 ENUM
3276   BFD_RELOC_CRIS_COPY
3277 ENUMX
3278   BFD_RELOC_CRIS_GLOB_DAT
3279 ENUMX
3280   BFD_RELOC_CRIS_JUMP_SLOT
3281 ENUMX
3282   BFD_RELOC_CRIS_RELATIVE
3283 ENUMDOC
3284   Relocs used in ELF shared libraries for CRIS.
3285 ENUM
3286   BFD_RELOC_CRIS_32_GOT
3287 ENUMDOC
3288   32-bit offset to symbol-entry within GOT.
3289 ENUM
3290   BFD_RELOC_CRIS_16_GOT
3291 ENUMDOC
3292   16-bit offset to symbol-entry within GOT.
3293 ENUM
3294   BFD_RELOC_CRIS_32_GOTPLT
3295 ENUMDOC
3296   32-bit offset to symbol-entry within GOT, with PLT handling.
3297 ENUM
3298   BFD_RELOC_CRIS_16_GOTPLT
3299 ENUMDOC
3300   16-bit offset to symbol-entry within GOT, with PLT handling.
3301 ENUM
3302   BFD_RELOC_CRIS_32_GOTREL
3303 ENUMDOC
3304   32-bit offset to symbol, relative to GOT.
3305 ENUM
3306   BFD_RELOC_CRIS_32_PLT_GOTREL
3307 ENUMDOC
3308   32-bit offset to symbol with PLT entry, relative to GOT.
3309 ENUM
3310   BFD_RELOC_CRIS_32_PLT_PCREL
3311 ENUMDOC
3312   32-bit offset to symbol with PLT entry, relative to this relocation.
3313
3314 ENUM
3315   BFD_RELOC_860_COPY
3316 ENUMX
3317   BFD_RELOC_860_GLOB_DAT
3318 ENUMX
3319   BFD_RELOC_860_JUMP_SLOT
3320 ENUMX
3321   BFD_RELOC_860_RELATIVE
3322 ENUMX
3323   BFD_RELOC_860_PC26
3324 ENUMX
3325   BFD_RELOC_860_PLT26
3326 ENUMX
3327   BFD_RELOC_860_PC16
3328 ENUMX
3329   BFD_RELOC_860_LOW0
3330 ENUMX
3331   BFD_RELOC_860_SPLIT0
3332 ENUMX
3333   BFD_RELOC_860_LOW1
3334 ENUMX
3335   BFD_RELOC_860_SPLIT1
3336 ENUMX
3337   BFD_RELOC_860_LOW2
3338 ENUMX
3339   BFD_RELOC_860_SPLIT2
3340 ENUMX
3341   BFD_RELOC_860_LOW3
3342 ENUMX
3343   BFD_RELOC_860_LOGOT0
3344 ENUMX
3345   BFD_RELOC_860_SPGOT0
3346 ENUMX
3347   BFD_RELOC_860_LOGOT1
3348 ENUMX
3349   BFD_RELOC_860_SPGOT1
3350 ENUMX
3351   BFD_RELOC_860_LOGOTOFF0
3352 ENUMX
3353   BFD_RELOC_860_SPGOTOFF0
3354 ENUMX
3355   BFD_RELOC_860_LOGOTOFF1
3356 ENUMX
3357   BFD_RELOC_860_SPGOTOFF1
3358 ENUMX
3359   BFD_RELOC_860_LOGOTOFF2
3360 ENUMX
3361   BFD_RELOC_860_LOGOTOFF3
3362 ENUMX
3363   BFD_RELOC_860_LOPC
3364 ENUMX
3365   BFD_RELOC_860_HIGHADJ
3366 ENUMX
3367   BFD_RELOC_860_HAGOT
3368 ENUMX
3369   BFD_RELOC_860_HAGOTOFF
3370 ENUMX
3371   BFD_RELOC_860_HAPC
3372 ENUMX
3373   BFD_RELOC_860_HIGH
3374 ENUMX
3375   BFD_RELOC_860_HIGOT
3376 ENUMX
3377   BFD_RELOC_860_HIGOTOFF
3378 ENUMDOC
3379   Intel i860 Relocations.
3380
3381 ENUM
3382   BFD_RELOC_OPENRISC_ABS_26
3383 ENUMX
3384   BFD_RELOC_OPENRISC_REL_26
3385 ENUMDOC
3386   OpenRISC Relocations.
3387
3388 ENUM
3389   BFD_RELOC_H8_DIR16A8
3390 ENUMX
3391   BFD_RELOC_H8_DIR16R8
3392 ENUMX
3393   BFD_RELOC_H8_DIR24A8
3394 ENUMX
3395   BFD_RELOC_H8_DIR24R8
3396 ENUMX
3397   BFD_RELOC_H8_DIR32A16
3398 ENUMDOC
3399   H8 elf Relocations.
3400
3401 ENUM
3402   BFD_RELOC_XSTORMY16_REL_12
3403 ENUMX
3404   BFD_RELOC_XSTORMY16_24
3405 ENUMX
3406   BFD_RELOC_XSTORMY16_FPTR16
3407 ENUMDOC
3408   Sony Xstormy16 Relocations.
3409
3410 ENDSENUM
3411   BFD_RELOC_UNUSED
3412 CODE_FRAGMENT
3413 .
3414 .typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
3415 */
3416
3417 /*
3418 FUNCTION
3419         bfd_reloc_type_lookup
3420
3421 SYNOPSIS
3422         reloc_howto_type *
3423         bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);
3424
3425 DESCRIPTION
3426         Return a pointer to a howto structure which, when
3427         invoked, will perform the relocation @var{code} on data from the
3428         architecture noted.
3429
3430 */
3431
3432 reloc_howto_type *
3433 bfd_reloc_type_lookup (abfd, code)
3434      bfd *abfd;
3435      bfd_reloc_code_real_type code;
3436 {
3437   return BFD_SEND (abfd, reloc_type_lookup, (abfd, code));
3438 }
3439
3440 static reloc_howto_type bfd_howto_32 =
3441 HOWTO (0, 00, 2, 32, false, 0, complain_overflow_bitfield, 0, "VRT32", false, 0xffffffff, 0xffffffff, true);
3442
3443 /*
3444 INTERNAL_FUNCTION
3445         bfd_default_reloc_type_lookup
3446
3447 SYNOPSIS
3448         reloc_howto_type *bfd_default_reloc_type_lookup
3449         (bfd *abfd, bfd_reloc_code_real_type  code);
3450
3451 DESCRIPTION
3452         Provides a default relocation lookup routine for any architecture.
3453
3454 */
3455
3456 reloc_howto_type *
3457 bfd_default_reloc_type_lookup (abfd, code)
3458      bfd *abfd;
3459      bfd_reloc_code_real_type code;
3460 {
3461   switch (code)
3462     {
3463     case BFD_RELOC_CTOR:
3464       /* The type of reloc used in a ctor, which will be as wide as the
3465          address - so either a 64, 32, or 16 bitter.  */
3466       switch (bfd_get_arch_info (abfd)->bits_per_address)
3467         {
3468         case 64:
3469           BFD_FAIL ();
3470         case 32:
3471           return &bfd_howto_32;
3472         case 16:
3473           BFD_FAIL ();
3474         default:
3475           BFD_FAIL ();
3476         }
3477     default:
3478       BFD_FAIL ();
3479     }
3480   return (reloc_howto_type *) NULL;
3481 }
3482
3483 /*
3484 FUNCTION
3485         bfd_get_reloc_code_name
3486
3487 SYNOPSIS
3488         const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code);
3489
3490 DESCRIPTION
3491         Provides a printable name for the supplied relocation code.
3492         Useful mainly for printing error messages.
3493 */
3494
3495 const char *
3496 bfd_get_reloc_code_name (code)
3497      bfd_reloc_code_real_type code;
3498 {
3499   if (code > BFD_RELOC_UNUSED)
3500     return 0;
3501   return bfd_reloc_code_real_names[(int)code];
3502 }
3503
3504 /*
3505 INTERNAL_FUNCTION
3506         bfd_generic_relax_section
3507
3508 SYNOPSIS
3509         boolean bfd_generic_relax_section
3510          (bfd *abfd,
3511           asection *section,
3512           struct bfd_link_info *,
3513           boolean *);
3514
3515 DESCRIPTION
3516         Provides default handling for relaxing for back ends which
3517         don't do relaxing -- i.e., does nothing.
3518 */
3519
3520 boolean
3521 bfd_generic_relax_section (abfd, section, link_info, again)
3522      bfd *abfd ATTRIBUTE_UNUSED;
3523      asection *section ATTRIBUTE_UNUSED;
3524      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3525      boolean *again;
3526 {
3527   *again = false;
3528   return true;
3529 }
3530
3531 /*
3532 INTERNAL_FUNCTION
3533         bfd_generic_gc_sections
3534
3535 SYNOPSIS
3536         boolean bfd_generic_gc_sections
3537          (bfd *, struct bfd_link_info *);
3538
3539 DESCRIPTION
3540         Provides default handling for relaxing for back ends which
3541         don't do section gc -- i.e., does nothing.
3542 */
3543
3544 boolean
3545 bfd_generic_gc_sections (abfd, link_info)
3546      bfd *abfd ATTRIBUTE_UNUSED;
3547      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3548 {
3549   return true;
3550 }
3551
3552 /*
3553 INTERNAL_FUNCTION
3554         bfd_generic_merge_sections
3555
3556 SYNOPSIS
3557         boolean bfd_generic_merge_sections
3558          (bfd *, struct bfd_link_info *);
3559
3560 DESCRIPTION
3561         Provides default handling for SEC_MERGE section merging for back ends
3562         which don't have SEC_MERGE support -- i.e., does nothing.
3563 */
3564
3565 boolean
3566 bfd_generic_merge_sections (abfd, link_info)
3567      bfd *abfd ATTRIBUTE_UNUSED;
3568      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3569 {
3570   return true;
3571 }
3572
3573 /*
3574 INTERNAL_FUNCTION
3575         bfd_generic_get_relocated_section_contents
3576
3577 SYNOPSIS
3578         bfd_byte *
3579            bfd_generic_get_relocated_section_contents (bfd *abfd,
3580              struct bfd_link_info *link_info,
3581              struct bfd_link_order *link_order,
3582              bfd_byte *data,
3583              boolean relocateable,
3584              asymbol **symbols);
3585
3586 DESCRIPTION
3587         Provides default handling of relocation effort for back ends
3588         which can't be bothered to do it efficiently.
3589
3590 */
3591
3592 bfd_byte *
3593 bfd_generic_get_relocated_section_contents (abfd, link_info, link_order, data,
3594                                             relocateable, symbols)
3595      bfd *abfd;
3596      struct bfd_link_info *link_info;
3597      struct bfd_link_order *link_order;
3598      bfd_byte *data;
3599      boolean relocateable;
3600      asymbol **symbols;
3601 {
3602   /* Get enough memory to hold the stuff.  */
3603   bfd *input_bfd = link_order->u.indirect.section->owner;
3604   asection *input_section = link_order->u.indirect.section;
3605
3606   long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
3607   arelent **reloc_vector = NULL;
3608   long reloc_count;
3609
3610   if (reloc_size < 0)
3611     goto error_return;
3612
3613   reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
3614   if (reloc_vector == NULL && reloc_size != 0)
3615     goto error_return;
3616
3617   /* Read in the section.  */
3618   if (!bfd_get_section_contents (input_bfd,
3619                                  input_section,
3620                                  (PTR) data,
3621                                  (bfd_vma) 0,
3622                                  input_section->_raw_size))
3623     goto error_return;
3624
3625   /* We're not relaxing the section, so just copy the size info.  */
3626   input_section->_cooked_size = input_section->_raw_size;
3627   input_section->reloc_done = true;
3628
3629   reloc_count = bfd_canonicalize_reloc (input_bfd,
3630                                         input_section,
3631                                         reloc_vector,
3632                                         symbols);
3633   if (reloc_count < 0)
3634     goto error_return;
3635
3636   if (reloc_count > 0)
3637     {
3638       arelent **parent;
3639       for (parent = reloc_vector; *parent != (arelent *) NULL;
3640            parent++)
3641         {
3642           char *error_message = (char *) NULL;
3643           bfd_reloc_status_type r =
3644             bfd_perform_relocation (input_bfd,
3645                                     *parent,
3646                                     (PTR) data,
3647                                     input_section,
3648                                     relocateable ? abfd : (bfd *) NULL,
3649                                     &error_message);
3650
3651           if (relocateable)
3652             {
3653               asection *os = input_section->output_section;
3654
3655               /* A partial link, so keep the relocs.  */
3656               os->orelocation[os->reloc_count] = *parent;
3657               os->reloc_count++;
3658             }
3659
3660           if (r != bfd_reloc_ok)
3661             {
3662               switch (r)
3663                 {
3664                 case bfd_reloc_undefined:
3665                   if (!((*link_info->callbacks->undefined_symbol)
3666                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3667                          input_bfd, input_section, (*parent)->address,
3668                          true)))
3669                     goto error_return;
3670                   break;
3671                 case bfd_reloc_dangerous:
3672                   BFD_ASSERT (error_message != (char *) NULL);
3673                   if (!((*link_info->callbacks->reloc_dangerous)
3674                         (link_info, error_message, input_bfd, input_section,
3675                          (*parent)->address)))
3676                     goto error_return;
3677                   break;
3678                 case bfd_reloc_overflow:
3679                   if (!((*link_info->callbacks->reloc_overflow)
3680                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3681                          (*parent)->howto->name, (*parent)->addend,
3682                          input_bfd, input_section, (*parent)->address)))
3683                     goto error_return;
3684                   break;
3685                 case bfd_reloc_outofrange:
3686                 default:
3687                   abort ();
3688                   break;
3689                 }
3690
3691             }
3692         }
3693     }
3694   if (reloc_vector != NULL)
3695     free (reloc_vector);
3696   return data;
3697
3698 error_return:
3699   if (reloc_vector != NULL)
3700     free (reloc_vector);
3701   return NULL;
3702 }