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 .  bfd_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 .  bfd_boolean partial_inplace;
 346 .
 347 .  {* src_mask selects the part of the instruction (or data) to be used
 348 .     in the relocation sum.  If the target relocations don't have an
 349 .     addend in the reloc, eg. ELF USE_REL, src_mask will normally equal
 350 .     dst_mask to extract the addend from the section contents.  If
 351 .     relocations do have an addend in the reloc, eg. ELF USE_RELA, this
 352 .     field should be zero.  Non-zero values for ELF USE_RELA targets are
 353 .     bogus as in those cases the value in the dst_mask part of the
 354 .     section contents should be treated as garbage.  *}
 355 .  bfd_vma src_mask;
 356 .
 357 .  {* dst_mask selects which parts of the instruction (or data) are
 358 .     replaced with a relocated value.  *}
 359 .  bfd_vma dst_mask;
 360 .
 361 .  {* When some formats create PC relative instructions, they leave
 362 .     the value of the pc of the place being relocated in the offset
 363 .     slot of the instruction, so that a PC relative relocation can
 364 .     be made just by adding in an ordinary offset (e.g., sun3 a.out).
 365 .     Some formats leave the displacement part of an instruction
 366 .     empty (e.g., m88k bcs); this flag signals the fact.  *}
 367 .  bfd_boolean pcrel_offset;
 368 .};
 369 .
 370 */
 371
 372 /*
 373 FUNCTION
 374         The HOWTO Macro
 375
 376 DESCRIPTION
 377         The HOWTO define is horrible and will go away.
 378
 379 .#define HOWTO(C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC) \
 380 .  { (unsigned) C, R, S, B, P, BI, O, SF, NAME, INPLACE, MASKSRC, MASKDST, PC }
 381
 382 DESCRIPTION
 383         And will be replaced with the totally magic way. But for the
 384         moment, we are compatible, so do it this way.
 385
 386 .#define NEWHOWTO(FUNCTION, NAME, SIZE, REL, IN) \
 387 .  HOWTO (0, 0, SIZE, 0, REL, 0, complain_overflow_dont, FUNCTION, \
 388 .         NAME, FALSE, 0, 0, IN)
 389 .
 390
 391 DESCRIPTION
 392         This is used to fill in an empty howto entry in an array.
 393
 394 .#define EMPTY_HOWTO(C) \
 395 .  HOWTO ((C), 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL, \
 396 .         NULL, FALSE, 0, 0, FALSE)
 397 .
 398
 399 DESCRIPTION
 400         Helper routine to turn a symbol into a relocation value.
 401
 402 .#define HOWTO_PREPARE(relocation, symbol)               \
 403 .  {                                                     \
 404 .    if (symbol != (asymbol *) NULL)                     \
 405 .      {                                                 \
 406 .        if (bfd_is_com_section (symbol->section))       \
 407 .          {                                             \
 408 .            relocation = 0;                             \
 409 .          }                                             \
 410 .        else                                            \
 411 .          {                                             \
 412 .            relocation = symbol->value;                 \
 413 .          }                                             \
 414 .      }                                                 \
 415 .  }
 416 .
 417 */
 418
 419 /*
 420 FUNCTION
 421         bfd_get_reloc_size
 422
 423 SYNOPSIS
 424         unsigned int bfd_get_reloc_size (reloc_howto_type *);
 425
 426 DESCRIPTION
 427         For a reloc_howto_type that operates on a fixed number of bytes,
 428         this returns the number of bytes operated on.
 429  */
 430
 431 unsigned int
 432 bfd_get_reloc_size (howto)
 433      reloc_howto_type *howto;
 434 {
 435   switch (howto->size)
 436     {
 437     case 0: return 1;
 438     case 1: return 2;
 439     case 2: return 4;
 440     case 3: return 0;
 441     case 4: return 8;
 442     case 8: return 16;
 443     case -2: return 4;
 444     default: abort ();
 445     }
 446 }
 447
 448 /*
 449 TYPEDEF
 450         arelent_chain
 451
 452 DESCRIPTION
 453
 454         How relocs are tied together in an <<asection>>:
 455
 456 .typedef struct relent_chain
 457 .{
 458 .  arelent relent;
 459 .  struct relent_chain *next;
 460 .}
 461 .arelent_chain;
 462 .
 463 */
 464
 465 /* N_ONES produces N one bits, without overflowing machine arithmetic.  */
 466 #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1)
 467
 468 /*
 469 FUNCTION
 470         bfd_check_overflow
 471
 472 SYNOPSIS
 473         bfd_reloc_status_type
 474                 bfd_check_overflow
 475                         (enum complain_overflow how,
 476                          unsigned int bitsize,
 477                          unsigned int rightshift,
 478                          unsigned int addrsize,
 479                          bfd_vma relocation);
 480
 481 DESCRIPTION
 482         Perform overflow checking on @var{relocation} which has
 483         @var{bitsize} significant bits and will be shifted right by
 484         @var{rightshift} bits, on a machine with addresses containing
 485         @var{addrsize} significant bits.  The result is either of
 486         @code{bfd_reloc_ok} or @code{bfd_reloc_overflow}.
 487
 488 */
 489
 490 bfd_reloc_status_type
 491 bfd_check_overflow (how, bitsize, rightshift, addrsize, relocation)
 492      enum complain_overflow how;
 493      unsigned int bitsize;
 494      unsigned int rightshift;
 495      unsigned int addrsize;
 496      bfd_vma relocation;
 497 {
 498   bfd_vma fieldmask, addrmask, signmask, ss, a;
 499   bfd_reloc_status_type flag = bfd_reloc_ok;
 500
 501   a = relocation;
 502
 503   /* Note: BITSIZE should always be <= ADDRSIZE, but in case it's not,
 504      we'll be permissive: extra bits in the field mask will
 505      automatically extend the address mask for purposes of the
 506      overflow check.  */
 507   fieldmask = N_ONES (bitsize);
 508   addrmask = N_ONES (addrsize) | fieldmask;
 509
 510   switch (how)
 511     {
 512     case complain_overflow_dont:
 513       break;
 514
 515     case complain_overflow_signed:
 516       /* If any sign bits are set, all sign bits must be set.  That
 517          is, A must be a valid negative address after shifting.  */
 518       a = (a & addrmask) >> rightshift;
 519       signmask = ~ (fieldmask >> 1);
 520       ss = a & signmask;
 521       if (ss != 0 && ss != ((addrmask >> rightshift) & signmask))
 522         flag = bfd_reloc_overflow;
 523       break;
 524
 525     case complain_overflow_unsigned:
 526       /* We have an overflow if the address does not fit in the field.  */
 527       a = (a & addrmask) >> rightshift;
 528       if ((a & ~ fieldmask) != 0)
 529         flag = bfd_reloc_overflow;
 530       break;
 531
 532     case complain_overflow_bitfield:
 533       /* Bitfields are sometimes signed, sometimes unsigned.  We
 534          explicitly allow an address wrap too, which means a bitfield
 535          of n bits is allowed to store -2**n to 2**n-1.  Thus overflow
 536          if the value has some, but not all, bits set outside the
 537          field.  */
 538       a >>= rightshift;
 539       ss = a & ~ fieldmask;
 540       if (ss != 0 && ss != (((bfd_vma) -1 >> rightshift) & ~ fieldmask))
 541         flag = bfd_reloc_overflow;
 542       break;
 543
 544     default:
 545       abort ();
 546     }
 547
 548   return flag;
 549 }
 550
 551 /*
 552 FUNCTION
 553         bfd_perform_relocation
 554
 555 SYNOPSIS
 556         bfd_reloc_status_type
 557                 bfd_perform_relocation
 558                         (bfd *abfd,
 559                          arelent *reloc_entry,
 560                          PTR data,
 561                          asection *input_section,
 562                          bfd *output_bfd,
 563                          char **error_message);
 564
 565 DESCRIPTION
 566         If @var{output_bfd} is supplied to this function, the
 567         generated image will be relocatable; the relocations are
 568         copied to the output file after they have been changed to
 569         reflect the new state of the world. There are two ways of
 570         reflecting the results of partial linkage in an output file:
 571         by modifying the output data in place, and by modifying the
 572         relocation record.  Some native formats (e.g., basic a.out and
 573         basic coff) have no way of specifying an addend in the
 574         relocation type, so the addend has to go in the output data.
 575         This is no big deal since in these formats the output data
 576         slot will always be big enough for the addend. Complex reloc
 577         types with addends were invented to solve just this problem.
 578         The @var{error_message} argument is set to an error message if
 579         this return @code{bfd_reloc_dangerous}.
 580
 581 */
 582
 583 bfd_reloc_status_type
 584 bfd_perform_relocation (abfd, reloc_entry, data, input_section, output_bfd,
 585                         error_message)
 586      bfd *abfd;
 587      arelent *reloc_entry;
 588      PTR data;
 589      asection *input_section;
 590      bfd *output_bfd;
 591      char **error_message;
 592 {
 593   bfd_vma relocation;
 594   bfd_reloc_status_type flag = bfd_reloc_ok;
 595   bfd_size_type octets = reloc_entry->address * bfd_octets_per_byte (abfd);
 596   bfd_vma output_base = 0;
 597   reloc_howto_type *howto = reloc_entry->howto;
 598   asection *reloc_target_output_section;
 599   asymbol *symbol;
 600
 601   symbol = *(reloc_entry->sym_ptr_ptr);
 602   if (bfd_is_abs_section (symbol->section)
 603       && output_bfd != (bfd *) NULL)
 604     {
 605       reloc_entry->address += input_section->output_offset;
 606       return bfd_reloc_ok;
 607     }
 608
 609   /* If we are not producing relocateable output, return an error if
 610      the symbol is not defined.  An undefined weak symbol is
 611      considered to have a value of zero (SVR4 ABI, p. 4-27).  */
 612   if (bfd_is_und_section (symbol->section)
 613       && (symbol->flags & BSF_WEAK) == 0
 614       && output_bfd == (bfd *) NULL)
 615     flag = bfd_reloc_undefined;
 616
 617   /* If there is a function supplied to handle this relocation type,
 618      call it.  It'll return `bfd_reloc_continue' if further processing
 619      can be done.  */
 620   if (howto->special_function)
 621     {
 622       bfd_reloc_status_type cont;
 623       cont = howto->special_function (abfd, reloc_entry, symbol, data,
 624                                       input_section, output_bfd,
 625                                       error_message);
 626       if (cont != bfd_reloc_continue)
 627         return cont;
 628     }
 629
 630   /* Is the address of the relocation really within the section?  */
 631   if (reloc_entry->address > (input_section->_cooked_size
 632                               / bfd_octets_per_byte (abfd)))
 633     return bfd_reloc_outofrange;
 634
 635   /* Work out which section the relocation is targetted at and the
 636      initial relocation command value.  */
 637
 638   /* Get symbol value.  (Common symbols are special.)  */
 639   if (bfd_is_com_section (symbol->section))
 640     relocation = 0;
 641   else
 642     relocation = symbol->value;
 643
 644   reloc_target_output_section = symbol->section->output_section;
 645
 646   /* Convert input-section-relative symbol value to absolute.  */
 647   if ((output_bfd && ! howto->partial_inplace)
 648       || reloc_target_output_section == NULL)
 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)
 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)
 695         relocation -= reloc_entry->address;
 696     }
 697
 698   if (output_bfd != (bfd *) NULL)
 699     {
 700       if (! howto->partial_inplace)
 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)
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)
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 && howto->partial_inplace)
1087         relocation -= reloc_entry->address;
1088     }
1089
1090   if (! howto->partial_inplace)
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_ALPHA_TLSGD
1967 ENUMX
1968   BFD_RELOC_ALPHA_TLSLDM
1969 ENUMX
1970   BFD_RELOC_ALPHA_DTPMOD64
1971 ENUMX
1972   BFD_RELOC_ALPHA_GOTDTPREL16
1973 ENUMX
1974   BFD_RELOC_ALPHA_DTPREL64
1975 ENUMX
1976   BFD_RELOC_ALPHA_DTPREL_HI16
1977 ENUMX
1978   BFD_RELOC_ALPHA_DTPREL_LO16
1979 ENUMX
1980   BFD_RELOC_ALPHA_DTPREL16
1981 ENUMX
1982   BFD_RELOC_ALPHA_GOTTPREL16
1983 ENUMX
1984   BFD_RELOC_ALPHA_TPREL64
1985 ENUMX
1986   BFD_RELOC_ALPHA_TPREL_HI16
1987 ENUMX
1988   BFD_RELOC_ALPHA_TPREL_LO16
1989 ENUMX
1990   BFD_RELOC_ALPHA_TPREL16
1991 ENUMDOC
1992   Alpha thread-local storage relocations.
1993
1994 ENUM
1995   BFD_RELOC_MIPS_JMP
1996 ENUMDOC
1997   Bits 27..2 of the relocation address shifted right 2 bits;
1998      simple reloc otherwise.
1999
2000 ENUM
2001   BFD_RELOC_MIPS16_JMP
2002 ENUMDOC
2003   The MIPS16 jump instruction.
2004
2005 ENUM
2006   BFD_RELOC_MIPS16_GPREL
2007 ENUMDOC
2008   MIPS16 GP relative reloc.
2009
2010 ENUM
2011   BFD_RELOC_HI16
2012 ENUMDOC
2013   High 16 bits of 32-bit value; simple reloc.
2014 ENUM
2015   BFD_RELOC_HI16_S
2016 ENUMDOC
2017   High 16 bits of 32-bit value but the low 16 bits will be sign
2018      extended and added to form the final result.  If the low 16
2019      bits form a negative number, we need to add one to the high value
2020      to compensate for the borrow when the low bits are added.
2021 ENUM
2022   BFD_RELOC_LO16
2023 ENUMDOC
2024   Low 16 bits.
2025 ENUM
2026   BFD_RELOC_PCREL_HI16_S
2027 ENUMDOC
2028   Like BFD_RELOC_HI16_S, but PC relative.
2029 ENUM
2030   BFD_RELOC_PCREL_LO16
2031 ENUMDOC
2032   Like BFD_RELOC_LO16, but PC relative.
2033
2034 ENUM
2035   BFD_RELOC_MIPS_LITERAL
2036 ENUMDOC
2037   Relocation against a MIPS literal section.
2038
2039 ENUM
2040   BFD_RELOC_MIPS_GOT16
2041 ENUMX
2042   BFD_RELOC_MIPS_CALL16
2043 ENUMX
2044   BFD_RELOC_MIPS_GOT_HI16
2045 ENUMX
2046   BFD_RELOC_MIPS_GOT_LO16
2047 ENUMX
2048   BFD_RELOC_MIPS_CALL_HI16
2049 ENUMX
2050   BFD_RELOC_MIPS_CALL_LO16
2051 ENUMX
2052   BFD_RELOC_MIPS_SUB
2053 ENUMX
2054   BFD_RELOC_MIPS_GOT_PAGE
2055 ENUMX
2056   BFD_RELOC_MIPS_GOT_OFST
2057 ENUMX
2058   BFD_RELOC_MIPS_GOT_DISP
2059 ENUMX
2060   BFD_RELOC_MIPS_SHIFT5
2061 ENUMX
2062   BFD_RELOC_MIPS_SHIFT6
2063 ENUMX
2064   BFD_RELOC_MIPS_INSERT_A
2065 ENUMX
2066   BFD_RELOC_MIPS_INSERT_B
2067 ENUMX
2068   BFD_RELOC_MIPS_DELETE
2069 ENUMX
2070   BFD_RELOC_MIPS_HIGHEST
2071 ENUMX
2072   BFD_RELOC_MIPS_HIGHER
2073 ENUMX
2074   BFD_RELOC_MIPS_SCN_DISP
2075 ENUMX
2076   BFD_RELOC_MIPS_REL16
2077 ENUMX
2078   BFD_RELOC_MIPS_RELGOT
2079 ENUMX
2080   BFD_RELOC_MIPS_JALR
2081 COMMENT
2082 ENUM
2083   BFD_RELOC_FRV_LABEL16
2084 ENUMX
2085   BFD_RELOC_FRV_LABEL24
2086 ENUMX
2087   BFD_RELOC_FRV_LO16
2088 ENUMX
2089   BFD_RELOC_FRV_HI16
2090 ENUMX
2091   BFD_RELOC_FRV_GPREL12
2092 ENUMX
2093   BFD_RELOC_FRV_GPRELU12
2094 ENUMX
2095   BFD_RELOC_FRV_GPREL32
2096 ENUMX
2097   BFD_RELOC_FRV_GPRELHI
2098 ENUMX
2099   BFD_RELOC_FRV_GPRELLO
2100 ENUMDOC
2101   Fujitsu Frv Relocations.
2102 COMMENT
2103 COMMENT
2104 ENUMDOC
2105   MIPS ELF relocations.
2106
2107 COMMENT
2108
2109 ENUM
2110   BFD_RELOC_386_GOT32
2111 ENUMX
2112   BFD_RELOC_386_PLT32
2113 ENUMX
2114   BFD_RELOC_386_COPY
2115 ENUMX
2116   BFD_RELOC_386_GLOB_DAT
2117 ENUMX
2118   BFD_RELOC_386_JUMP_SLOT
2119 ENUMX
2120   BFD_RELOC_386_RELATIVE
2121 ENUMX
2122   BFD_RELOC_386_GOTOFF
2123 ENUMX
2124   BFD_RELOC_386_GOTPC
2125 ENUMX
2126   BFD_RELOC_386_TLS_TPOFF
2127 ENUMX
2128   BFD_RELOC_386_TLS_IE
2129 ENUMX
2130   BFD_RELOC_386_TLS_GOTIE
2131 ENUMX
2132   BFD_RELOC_386_TLS_LE
2133 ENUMX
2134   BFD_RELOC_386_TLS_GD
2135 ENUMX
2136   BFD_RELOC_386_TLS_LDM
2137 ENUMX
2138   BFD_RELOC_386_TLS_LDO_32
2139 ENUMX
2140   BFD_RELOC_386_TLS_IE_32
2141 ENUMX
2142   BFD_RELOC_386_TLS_LE_32
2143 ENUMX
2144   BFD_RELOC_386_TLS_DTPMOD32
2145 ENUMX
2146   BFD_RELOC_386_TLS_DTPOFF32
2147 ENUMX
2148   BFD_RELOC_386_TLS_TPOFF32
2149 ENUMDOC
2150   i386/elf relocations
2151
2152 ENUM
2153   BFD_RELOC_X86_64_GOT32
2154 ENUMX
2155   BFD_RELOC_X86_64_PLT32
2156 ENUMX
2157   BFD_RELOC_X86_64_COPY
2158 ENUMX
2159   BFD_RELOC_X86_64_GLOB_DAT
2160 ENUMX
2161   BFD_RELOC_X86_64_JUMP_SLOT
2162 ENUMX
2163   BFD_RELOC_X86_64_RELATIVE
2164 ENUMX
2165   BFD_RELOC_X86_64_GOTPCREL
2166 ENUMX
2167   BFD_RELOC_X86_64_32S
2168 ENUMX
2169   BFD_RELOC_X86_64_DTPMOD64
2170 ENUMX
2171   BFD_RELOC_X86_64_DTPOFF64
2172 ENUMX
2173   BFD_RELOC_X86_64_TPOFF64
2174 ENUMX
2175   BFD_RELOC_X86_64_TLSGD
2176 ENUMX
2177   BFD_RELOC_X86_64_TLSLD
2178 ENUMX
2179   BFD_RELOC_X86_64_DTPOFF32
2180 ENUMX
2181   BFD_RELOC_X86_64_GOTTPOFF
2182 ENUMX
2183   BFD_RELOC_X86_64_TPOFF32
2184 ENUMDOC
2185   x86-64/elf relocations
2186
2187 ENUM
2188   BFD_RELOC_NS32K_IMM_8
2189 ENUMX
2190   BFD_RELOC_NS32K_IMM_16
2191 ENUMX
2192   BFD_RELOC_NS32K_IMM_32
2193 ENUMX
2194   BFD_RELOC_NS32K_IMM_8_PCREL
2195 ENUMX
2196   BFD_RELOC_NS32K_IMM_16_PCREL
2197 ENUMX
2198   BFD_RELOC_NS32K_IMM_32_PCREL
2199 ENUMX
2200   BFD_RELOC_NS32K_DISP_8
2201 ENUMX
2202   BFD_RELOC_NS32K_DISP_16
2203 ENUMX
2204   BFD_RELOC_NS32K_DISP_32
2205 ENUMX
2206   BFD_RELOC_NS32K_DISP_8_PCREL
2207 ENUMX
2208   BFD_RELOC_NS32K_DISP_16_PCREL
2209 ENUMX
2210   BFD_RELOC_NS32K_DISP_32_PCREL
2211 ENUMDOC
2212   ns32k relocations
2213
2214 ENUM
2215   BFD_RELOC_PDP11_DISP_8_PCREL
2216 ENUMX
2217   BFD_RELOC_PDP11_DISP_6_PCREL
2218 ENUMDOC
2219   PDP11 relocations
2220
2221 ENUM
2222   BFD_RELOC_PJ_CODE_HI16
2223 ENUMX
2224   BFD_RELOC_PJ_CODE_LO16
2225 ENUMX
2226   BFD_RELOC_PJ_CODE_DIR16
2227 ENUMX
2228   BFD_RELOC_PJ_CODE_DIR32
2229 ENUMX
2230   BFD_RELOC_PJ_CODE_REL16
2231 ENUMX
2232   BFD_RELOC_PJ_CODE_REL32
2233 ENUMDOC
2234   Picojava relocs.  Not all of these appear in object files.
2235
2236 ENUM
2237   BFD_RELOC_PPC_B26
2238 ENUMX
2239   BFD_RELOC_PPC_BA26
2240 ENUMX
2241   BFD_RELOC_PPC_TOC16
2242 ENUMX
2243   BFD_RELOC_PPC_B16
2244 ENUMX
2245   BFD_RELOC_PPC_B16_BRTAKEN
2246 ENUMX
2247   BFD_RELOC_PPC_B16_BRNTAKEN
2248 ENUMX
2249   BFD_RELOC_PPC_BA16
2250 ENUMX
2251   BFD_RELOC_PPC_BA16_BRTAKEN
2252 ENUMX
2253   BFD_RELOC_PPC_BA16_BRNTAKEN
2254 ENUMX
2255   BFD_RELOC_PPC_COPY
2256 ENUMX
2257   BFD_RELOC_PPC_GLOB_DAT
2258 ENUMX
2259   BFD_RELOC_PPC_JMP_SLOT
2260 ENUMX
2261   BFD_RELOC_PPC_RELATIVE
2262 ENUMX
2263   BFD_RELOC_PPC_LOCAL24PC
2264 ENUMX
2265   BFD_RELOC_PPC_EMB_NADDR32
2266 ENUMX
2267   BFD_RELOC_PPC_EMB_NADDR16
2268 ENUMX
2269   BFD_RELOC_PPC_EMB_NADDR16_LO
2270 ENUMX
2271   BFD_RELOC_PPC_EMB_NADDR16_HI
2272 ENUMX
2273   BFD_RELOC_PPC_EMB_NADDR16_HA
2274 ENUMX
2275   BFD_RELOC_PPC_EMB_SDAI16
2276 ENUMX
2277   BFD_RELOC_PPC_EMB_SDA2I16
2278 ENUMX
2279   BFD_RELOC_PPC_EMB_SDA2REL
2280 ENUMX
2281   BFD_RELOC_PPC_EMB_SDA21
2282 ENUMX
2283   BFD_RELOC_PPC_EMB_MRKREF
2284 ENUMX
2285   BFD_RELOC_PPC_EMB_RELSEC16
2286 ENUMX
2287   BFD_RELOC_PPC_EMB_RELST_LO
2288 ENUMX
2289   BFD_RELOC_PPC_EMB_RELST_HI
2290 ENUMX
2291   BFD_RELOC_PPC_EMB_RELST_HA
2292 ENUMX
2293   BFD_RELOC_PPC_EMB_BIT_FLD
2294 ENUMX
2295   BFD_RELOC_PPC_EMB_RELSDA
2296 ENUMX
2297   BFD_RELOC_PPC64_HIGHER
2298 ENUMX
2299   BFD_RELOC_PPC64_HIGHER_S
2300 ENUMX
2301   BFD_RELOC_PPC64_HIGHEST
2302 ENUMX
2303   BFD_RELOC_PPC64_HIGHEST_S
2304 ENUMX
2305   BFD_RELOC_PPC64_TOC16_LO
2306 ENUMX
2307   BFD_RELOC_PPC64_TOC16_HI
2308 ENUMX
2309   BFD_RELOC_PPC64_TOC16_HA
2310 ENUMX
2311   BFD_RELOC_PPC64_TOC
2312 ENUMX
2313   BFD_RELOC_PPC64_PLTGOT16
2314 ENUMX
2315   BFD_RELOC_PPC64_PLTGOT16_LO
2316 ENUMX
2317   BFD_RELOC_PPC64_PLTGOT16_HI
2318 ENUMX
2319   BFD_RELOC_PPC64_PLTGOT16_HA
2320 ENUMX
2321   BFD_RELOC_PPC64_ADDR16_DS
2322 ENUMX
2323   BFD_RELOC_PPC64_ADDR16_LO_DS
2324 ENUMX
2325   BFD_RELOC_PPC64_GOT16_DS
2326 ENUMX
2327   BFD_RELOC_PPC64_GOT16_LO_DS
2328 ENUMX
2329   BFD_RELOC_PPC64_PLT16_LO_DS
2330 ENUMX
2331   BFD_RELOC_PPC64_SECTOFF_DS
2332 ENUMX
2333   BFD_RELOC_PPC64_SECTOFF_LO_DS
2334 ENUMX
2335   BFD_RELOC_PPC64_TOC16_DS
2336 ENUMX
2337   BFD_RELOC_PPC64_TOC16_LO_DS
2338 ENUMX
2339   BFD_RELOC_PPC64_PLTGOT16_DS
2340 ENUMX
2341   BFD_RELOC_PPC64_PLTGOT16_LO_DS
2342 ENUMDOC
2343   Power(rs6000) and PowerPC relocations.
2344
2345 ENUM
2346   BFD_RELOC_I370_D12
2347 ENUMDOC
2348   IBM 370/390 relocations
2349
2350 ENUM
2351   BFD_RELOC_CTOR
2352 ENUMDOC
2353   The type of reloc used to build a contructor table - at the moment
2354   probably a 32 bit wide absolute relocation, but the target can choose.
2355   It generally does map to one of the other relocation types.
2356
2357 ENUM
2358   BFD_RELOC_ARM_PCREL_BRANCH
2359 ENUMDOC
2360   ARM 26 bit pc-relative branch.  The lowest two bits must be zero and are
2361   not stored in the instruction.
2362 ENUM
2363   BFD_RELOC_ARM_PCREL_BLX
2364 ENUMDOC
2365   ARM 26 bit pc-relative branch.  The lowest bit must be zero and is
2366   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2367   field in the instruction.
2368 ENUM
2369   BFD_RELOC_THUMB_PCREL_BLX
2370 ENUMDOC
2371   Thumb 22 bit pc-relative branch.  The lowest bit must be zero and is
2372   not stored in the instruction.  The 2nd lowest bit comes from a 1 bit
2373   field in the instruction.
2374 ENUM
2375   BFD_RELOC_ARM_IMMEDIATE
2376 ENUMX
2377   BFD_RELOC_ARM_ADRL_IMMEDIATE
2378 ENUMX
2379   BFD_RELOC_ARM_OFFSET_IMM
2380 ENUMX
2381   BFD_RELOC_ARM_SHIFT_IMM
2382 ENUMX
2383   BFD_RELOC_ARM_SWI
2384 ENUMX
2385   BFD_RELOC_ARM_MULTI
2386 ENUMX
2387   BFD_RELOC_ARM_CP_OFF_IMM
2388 ENUMX
2389   BFD_RELOC_ARM_ADR_IMM
2390 ENUMX
2391   BFD_RELOC_ARM_LDR_IMM
2392 ENUMX
2393   BFD_RELOC_ARM_LITERAL
2394 ENUMX
2395   BFD_RELOC_ARM_IN_POOL
2396 ENUMX
2397   BFD_RELOC_ARM_OFFSET_IMM8
2398 ENUMX
2399   BFD_RELOC_ARM_HWLITERAL
2400 ENUMX
2401   BFD_RELOC_ARM_THUMB_ADD
2402 ENUMX
2403   BFD_RELOC_ARM_THUMB_IMM
2404 ENUMX
2405   BFD_RELOC_ARM_THUMB_SHIFT
2406 ENUMX
2407   BFD_RELOC_ARM_THUMB_OFFSET
2408 ENUMX
2409   BFD_RELOC_ARM_GOT12
2410 ENUMX
2411   BFD_RELOC_ARM_GOT32
2412 ENUMX
2413   BFD_RELOC_ARM_JUMP_SLOT
2414 ENUMX
2415   BFD_RELOC_ARM_COPY
2416 ENUMX
2417   BFD_RELOC_ARM_GLOB_DAT
2418 ENUMX
2419   BFD_RELOC_ARM_PLT32
2420 ENUMX
2421   BFD_RELOC_ARM_RELATIVE
2422 ENUMX
2423   BFD_RELOC_ARM_GOTOFF
2424 ENUMX
2425   BFD_RELOC_ARM_GOTPC
2426 ENUMDOC
2427   These relocs are only used within the ARM assembler.  They are not
2428   (at present) written to any object files.
2429
2430 ENUM
2431   BFD_RELOC_SH_PCDISP8BY2
2432 ENUMX
2433   BFD_RELOC_SH_PCDISP12BY2
2434 ENUMX
2435   BFD_RELOC_SH_IMM4
2436 ENUMX
2437   BFD_RELOC_SH_IMM4BY2
2438 ENUMX
2439   BFD_RELOC_SH_IMM4BY4
2440 ENUMX
2441   BFD_RELOC_SH_IMM8
2442 ENUMX
2443   BFD_RELOC_SH_IMM8BY2
2444 ENUMX
2445   BFD_RELOC_SH_IMM8BY4
2446 ENUMX
2447   BFD_RELOC_SH_PCRELIMM8BY2
2448 ENUMX
2449   BFD_RELOC_SH_PCRELIMM8BY4
2450 ENUMX
2451   BFD_RELOC_SH_SWITCH16
2452 ENUMX
2453   BFD_RELOC_SH_SWITCH32
2454 ENUMX
2455   BFD_RELOC_SH_USES
2456 ENUMX
2457   BFD_RELOC_SH_COUNT
2458 ENUMX
2459   BFD_RELOC_SH_ALIGN
2460 ENUMX
2461   BFD_RELOC_SH_CODE
2462 ENUMX
2463   BFD_RELOC_SH_DATA
2464 ENUMX
2465   BFD_RELOC_SH_LABEL
2466 ENUMX
2467   BFD_RELOC_SH_LOOP_START
2468 ENUMX
2469   BFD_RELOC_SH_LOOP_END
2470 ENUMX
2471   BFD_RELOC_SH_COPY
2472 ENUMX
2473   BFD_RELOC_SH_GLOB_DAT
2474 ENUMX
2475   BFD_RELOC_SH_JMP_SLOT
2476 ENUMX
2477   BFD_RELOC_SH_RELATIVE
2478 ENUMX
2479   BFD_RELOC_SH_GOTPC
2480 ENUMX
2481   BFD_RELOC_SH_GOT_LOW16
2482 ENUMX
2483   BFD_RELOC_SH_GOT_MEDLOW16
2484 ENUMX
2485   BFD_RELOC_SH_GOT_MEDHI16
2486 ENUMX
2487   BFD_RELOC_SH_GOT_HI16
2488 ENUMX
2489   BFD_RELOC_SH_GOTPLT_LOW16
2490 ENUMX
2491   BFD_RELOC_SH_GOTPLT_MEDLOW16
2492 ENUMX
2493   BFD_RELOC_SH_GOTPLT_MEDHI16
2494 ENUMX
2495   BFD_RELOC_SH_GOTPLT_HI16
2496 ENUMX
2497   BFD_RELOC_SH_PLT_LOW16
2498 ENUMX
2499   BFD_RELOC_SH_PLT_MEDLOW16
2500 ENUMX
2501   BFD_RELOC_SH_PLT_MEDHI16
2502 ENUMX
2503   BFD_RELOC_SH_PLT_HI16
2504 ENUMX
2505   BFD_RELOC_SH_GOTOFF_LOW16
2506 ENUMX
2507   BFD_RELOC_SH_GOTOFF_MEDLOW16
2508 ENUMX
2509   BFD_RELOC_SH_GOTOFF_MEDHI16
2510 ENUMX
2511   BFD_RELOC_SH_GOTOFF_HI16
2512 ENUMX
2513   BFD_RELOC_SH_GOTPC_LOW16
2514 ENUMX
2515   BFD_RELOC_SH_GOTPC_MEDLOW16
2516 ENUMX
2517   BFD_RELOC_SH_GOTPC_MEDHI16
2518 ENUMX
2519   BFD_RELOC_SH_GOTPC_HI16
2520 ENUMX
2521   BFD_RELOC_SH_COPY64
2522 ENUMX
2523   BFD_RELOC_SH_GLOB_DAT64
2524 ENUMX
2525   BFD_RELOC_SH_JMP_SLOT64
2526 ENUMX
2527   BFD_RELOC_SH_RELATIVE64
2528 ENUMX
2529   BFD_RELOC_SH_GOT10BY4
2530 ENUMX
2531   BFD_RELOC_SH_GOT10BY8
2532 ENUMX
2533   BFD_RELOC_SH_GOTPLT10BY4
2534 ENUMX
2535   BFD_RELOC_SH_GOTPLT10BY8
2536 ENUMX
2537   BFD_RELOC_SH_GOTPLT32
2538 ENUMX
2539   BFD_RELOC_SH_SHMEDIA_CODE
2540 ENUMX
2541   BFD_RELOC_SH_IMMU5
2542 ENUMX
2543   BFD_RELOC_SH_IMMS6
2544 ENUMX
2545   BFD_RELOC_SH_IMMS6BY32
2546 ENUMX
2547   BFD_RELOC_SH_IMMU6
2548 ENUMX
2549   BFD_RELOC_SH_IMMS10
2550 ENUMX
2551   BFD_RELOC_SH_IMMS10BY2
2552 ENUMX
2553   BFD_RELOC_SH_IMMS10BY4
2554 ENUMX
2555   BFD_RELOC_SH_IMMS10BY8
2556 ENUMX
2557   BFD_RELOC_SH_IMMS16
2558 ENUMX
2559   BFD_RELOC_SH_IMMU16
2560 ENUMX
2561   BFD_RELOC_SH_IMM_LOW16
2562 ENUMX
2563   BFD_RELOC_SH_IMM_LOW16_PCREL
2564 ENUMX
2565   BFD_RELOC_SH_IMM_MEDLOW16
2566 ENUMX
2567   BFD_RELOC_SH_IMM_MEDLOW16_PCREL
2568 ENUMX
2569   BFD_RELOC_SH_IMM_MEDHI16
2570 ENUMX
2571   BFD_RELOC_SH_IMM_MEDHI16_PCREL
2572 ENUMX
2573   BFD_RELOC_SH_IMM_HI16
2574 ENUMX
2575   BFD_RELOC_SH_IMM_HI16_PCREL
2576 ENUMX
2577   BFD_RELOC_SH_PT_16
2578 ENUMX
2579   BFD_RELOC_SH_TLS_GD_32
2580 ENUMX
2581   BFD_RELOC_SH_TLS_LD_32
2582 ENUMX
2583   BFD_RELOC_SH_TLS_LDO_32
2584 ENUMX
2585   BFD_RELOC_SH_TLS_IE_32
2586 ENUMX
2587   BFD_RELOC_SH_TLS_LE_32
2588 ENUMX
2589   BFD_RELOC_SH_TLS_DTPMOD32
2590 ENUMX
2591   BFD_RELOC_SH_TLS_DTPOFF32
2592 ENUMX
2593   BFD_RELOC_SH_TLS_TPOFF32
2594 ENUMDOC
2595   Hitachi SH relocs.  Not all of these appear in object files.
2596
2597 ENUM
2598   BFD_RELOC_THUMB_PCREL_BRANCH9
2599 ENUMX
2600   BFD_RELOC_THUMB_PCREL_BRANCH12
2601 ENUMX
2602   BFD_RELOC_THUMB_PCREL_BRANCH23
2603 ENUMDOC
2604   Thumb 23-, 12- and 9-bit pc-relative branches.  The lowest bit must
2605   be zero and is not stored in the instruction.
2606
2607 ENUM
2608   BFD_RELOC_ARC_B22_PCREL
2609 ENUMDOC
2610   ARC Cores relocs.
2611   ARC 22 bit pc-relative branch.  The lowest two bits must be zero and are
2612   not stored in the instruction.  The high 20 bits are installed in bits 26
2613   through 7 of the instruction.
2614 ENUM
2615   BFD_RELOC_ARC_B26
2616 ENUMDOC
2617   ARC 26 bit absolute branch.  The lowest two bits must be zero and are not
2618   stored in the instruction.  The high 24 bits are installed in bits 23
2619   through 0.
2620
2621 ENUM
2622   BFD_RELOC_D10V_10_PCREL_R
2623 ENUMDOC
2624   Mitsubishi D10V relocs.
2625   This is a 10-bit reloc with the right 2 bits
2626   assumed to be 0.
2627 ENUM
2628   BFD_RELOC_D10V_10_PCREL_L
2629 ENUMDOC
2630   Mitsubishi D10V relocs.
2631   This is a 10-bit reloc with the right 2 bits
2632   assumed to be 0.  This is the same as the previous reloc
2633   except it is in the left container, i.e.,
2634   shifted left 15 bits.
2635 ENUM
2636   BFD_RELOC_D10V_18
2637 ENUMDOC
2638   This is an 18-bit reloc with the right 2 bits
2639   assumed to be 0.
2640 ENUM
2641   BFD_RELOC_D10V_18_PCREL
2642 ENUMDOC
2643   This is an 18-bit reloc with the right 2 bits
2644   assumed to be 0.
2645
2646 ENUM
2647   BFD_RELOC_D30V_6
2648 ENUMDOC
2649   Mitsubishi D30V relocs.
2650   This is a 6-bit absolute reloc.
2651 ENUM
2652   BFD_RELOC_D30V_9_PCREL
2653 ENUMDOC
2654   This is a 6-bit pc-relative reloc with
2655   the right 3 bits assumed to be 0.
2656 ENUM
2657   BFD_RELOC_D30V_9_PCREL_R
2658 ENUMDOC
2659   This is a 6-bit pc-relative reloc with
2660   the right 3 bits assumed to be 0. Same
2661   as the previous reloc but on the right side
2662   of the container.
2663 ENUM
2664   BFD_RELOC_D30V_15
2665 ENUMDOC
2666   This is a 12-bit absolute reloc with the
2667   right 3 bitsassumed to be 0.
2668 ENUM
2669   BFD_RELOC_D30V_15_PCREL
2670 ENUMDOC
2671   This is a 12-bit pc-relative reloc with
2672   the right 3 bits assumed to be 0.
2673 ENUM
2674   BFD_RELOC_D30V_15_PCREL_R
2675 ENUMDOC
2676   This is a 12-bit pc-relative reloc with
2677   the right 3 bits assumed to be 0. Same
2678   as the previous reloc but on the right side
2679   of the container.
2680 ENUM
2681   BFD_RELOC_D30V_21
2682 ENUMDOC
2683   This is an 18-bit absolute reloc with
2684   the right 3 bits assumed to be 0.
2685 ENUM
2686   BFD_RELOC_D30V_21_PCREL
2687 ENUMDOC
2688   This is an 18-bit pc-relative reloc with
2689   the right 3 bits assumed to be 0.
2690 ENUM
2691   BFD_RELOC_D30V_21_PCREL_R
2692 ENUMDOC
2693   This is an 18-bit pc-relative reloc with
2694   the right 3 bits assumed to be 0. Same
2695   as the previous reloc but on the right side
2696   of the container.
2697 ENUM
2698   BFD_RELOC_D30V_32
2699 ENUMDOC
2700   This is a 32-bit absolute reloc.
2701 ENUM
2702   BFD_RELOC_D30V_32_PCREL
2703 ENUMDOC
2704   This is a 32-bit pc-relative reloc.
2705
2706 ENUM
2707   BFD_RELOC_DLX_HI16_S
2708 ENUMDOC
2709   DLX relocs
2710 ENUM
2711   BFD_RELOC_DLX_LO16
2712 ENUMDOC
2713   DLX relocs
2714 ENUM
2715   BFD_RELOC_DLX_JMP26
2716 ENUMDOC
2717   DLX relocs
2718
2719 ENUM
2720   BFD_RELOC_M32R_24
2721 ENUMDOC
2722   Mitsubishi M32R relocs.
2723   This is a 24 bit absolute address.
2724 ENUM
2725   BFD_RELOC_M32R_10_PCREL
2726 ENUMDOC
2727   This is a 10-bit pc-relative reloc with the right 2 bits assumed to be 0.
2728 ENUM
2729   BFD_RELOC_M32R_18_PCREL
2730 ENUMDOC
2731   This is an 18-bit reloc with the right 2 bits assumed to be 0.
2732 ENUM
2733   BFD_RELOC_M32R_26_PCREL
2734 ENUMDOC
2735   This is a 26-bit reloc with the right 2 bits assumed to be 0.
2736 ENUM
2737   BFD_RELOC_M32R_HI16_ULO
2738 ENUMDOC
2739   This is a 16-bit reloc containing the high 16 bits of an address
2740   used when the lower 16 bits are treated as unsigned.
2741 ENUM
2742   BFD_RELOC_M32R_HI16_SLO
2743 ENUMDOC
2744   This is a 16-bit reloc containing the high 16 bits of an address
2745   used when the lower 16 bits are treated as signed.
2746 ENUM
2747   BFD_RELOC_M32R_LO16
2748 ENUMDOC
2749   This is a 16-bit reloc containing the lower 16 bits of an address.
2750 ENUM
2751   BFD_RELOC_M32R_SDA16
2752 ENUMDOC
2753   This is a 16-bit reloc containing the small data area offset for use in
2754   add3, load, and store instructions.
2755
2756 ENUM
2757   BFD_RELOC_V850_9_PCREL
2758 ENUMDOC
2759   This is a 9-bit reloc
2760 ENUM
2761   BFD_RELOC_V850_22_PCREL
2762 ENUMDOC
2763   This is a 22-bit reloc
2764
2765 ENUM
2766   BFD_RELOC_V850_SDA_16_16_OFFSET
2767 ENUMDOC
2768   This is a 16 bit offset from the short data area pointer.
2769 ENUM
2770   BFD_RELOC_V850_SDA_15_16_OFFSET
2771 ENUMDOC
2772   This is a 16 bit offset (of which only 15 bits are used) from the
2773   short data area pointer.
2774 ENUM
2775   BFD_RELOC_V850_ZDA_16_16_OFFSET
2776 ENUMDOC
2777   This is a 16 bit offset from the zero data area pointer.
2778 ENUM
2779   BFD_RELOC_V850_ZDA_15_16_OFFSET
2780 ENUMDOC
2781   This is a 16 bit offset (of which only 15 bits are used) from the
2782   zero data area pointer.
2783 ENUM
2784   BFD_RELOC_V850_TDA_6_8_OFFSET
2785 ENUMDOC
2786   This is an 8 bit offset (of which only 6 bits are used) from the
2787   tiny data area pointer.
2788 ENUM
2789   BFD_RELOC_V850_TDA_7_8_OFFSET
2790 ENUMDOC
2791   This is an 8bit offset (of which only 7 bits are used) from the tiny
2792   data area pointer.
2793 ENUM
2794   BFD_RELOC_V850_TDA_7_7_OFFSET
2795 ENUMDOC
2796   This is a 7 bit offset from the tiny data area pointer.
2797 ENUM
2798   BFD_RELOC_V850_TDA_16_16_OFFSET
2799 ENUMDOC
2800   This is a 16 bit offset from the tiny data area pointer.
2801 COMMENT
2802 ENUM
2803   BFD_RELOC_V850_TDA_4_5_OFFSET
2804 ENUMDOC
2805   This is a 5 bit offset (of which only 4 bits are used) from the tiny
2806   data area pointer.
2807 ENUM
2808   BFD_RELOC_V850_TDA_4_4_OFFSET
2809 ENUMDOC
2810   This is a 4 bit offset from the tiny data area pointer.
2811 ENUM
2812   BFD_RELOC_V850_SDA_16_16_SPLIT_OFFSET
2813 ENUMDOC
2814   This is a 16 bit offset from the short data area pointer, with the
2815   bits placed non-contigously in the instruction.
2816 ENUM
2817   BFD_RELOC_V850_ZDA_16_16_SPLIT_OFFSET
2818 ENUMDOC
2819   This is a 16 bit offset from the zero data area pointer, with the
2820   bits placed non-contigously in the instruction.
2821 ENUM
2822   BFD_RELOC_V850_CALLT_6_7_OFFSET
2823 ENUMDOC
2824   This is a 6 bit offset from the call table base pointer.
2825 ENUM
2826   BFD_RELOC_V850_CALLT_16_16_OFFSET
2827 ENUMDOC
2828   This is a 16 bit offset from the call table base pointer.
2829 ENUM
2830   BFD_RELOC_V850_LONGCALL
2831 ENUMDOC
2832   Used for relaxing indirect function calls.
2833 ENUM
2834   BFD_RELOC_V850_LONGJUMP
2835 ENUMDOC
2836   Used for relaxing indirect jumps.
2837 ENUM
2838   BFD_RELOC_V850_ALIGN
2839 ENUMDOC
2840   Used to maintain alignment whilst relaxing.
2841 ENUM
2842   BFD_RELOC_MN10300_32_PCREL
2843 ENUMDOC
2844   This is a 32bit pcrel reloc for the mn10300, offset by two bytes in the
2845   instruction.
2846 ENUM
2847   BFD_RELOC_MN10300_16_PCREL
2848 ENUMDOC
2849   This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the
2850   instruction.
2851
2852 ENUM
2853   BFD_RELOC_TIC30_LDP
2854 ENUMDOC
2855   This is a 8bit DP reloc for the tms320c30, where the most
2856   significant 8 bits of a 24 bit word are placed into the least
2857   significant 8 bits of the opcode.
2858
2859 ENUM
2860   BFD_RELOC_TIC54X_PARTLS7
2861 ENUMDOC
2862   This is a 7bit reloc for the tms320c54x, where the least
2863   significant 7 bits of a 16 bit word are placed into the least
2864   significant 7 bits of the opcode.
2865
2866 ENUM
2867   BFD_RELOC_TIC54X_PARTMS9
2868 ENUMDOC
2869   This is a 9bit DP reloc for the tms320c54x, where the most
2870   significant 9 bits of a 16 bit word are placed into the least
2871   significant 9 bits of the opcode.
2872
2873 ENUM
2874   BFD_RELOC_TIC54X_23
2875 ENUMDOC
2876   This is an extended address 23-bit reloc for the tms320c54x.
2877
2878 ENUM
2879   BFD_RELOC_TIC54X_16_OF_23
2880 ENUMDOC
2881   This is a 16-bit reloc for the tms320c54x, where the least
2882   significant 16 bits of a 23-bit extended address are placed into
2883   the opcode.
2884
2885 ENUM
2886   BFD_RELOC_TIC54X_MS7_OF_23
2887 ENUMDOC
2888   This is a reloc for the tms320c54x, where the most
2889   significant 7 bits of a 23-bit extended address are placed into
2890   the opcode.
2891
2892 ENUM
2893   BFD_RELOC_FR30_48
2894 ENUMDOC
2895   This is a 48 bit reloc for the FR30 that stores 32 bits.
2896 ENUM
2897   BFD_RELOC_FR30_20
2898 ENUMDOC
2899   This is a 32 bit reloc for the FR30 that stores 20 bits split up into
2900   two sections.
2901 ENUM
2902   BFD_RELOC_FR30_6_IN_4
2903 ENUMDOC
2904   This is a 16 bit reloc for the FR30 that stores a 6 bit word offset in
2905   4 bits.
2906 ENUM
2907   BFD_RELOC_FR30_8_IN_8
2908 ENUMDOC
2909   This is a 16 bit reloc for the FR30 that stores an 8 bit byte offset
2910   into 8 bits.
2911 ENUM
2912   BFD_RELOC_FR30_9_IN_8
2913 ENUMDOC
2914   This is a 16 bit reloc for the FR30 that stores a 9 bit short offset
2915   into 8 bits.
2916 ENUM
2917   BFD_RELOC_FR30_10_IN_8
2918 ENUMDOC
2919   This is a 16 bit reloc for the FR30 that stores a 10 bit word offset
2920   into 8 bits.
2921 ENUM
2922   BFD_RELOC_FR30_9_PCREL
2923 ENUMDOC
2924   This is a 16 bit reloc for the FR30 that stores a 9 bit pc relative
2925   short offset into 8 bits.
2926 ENUM
2927   BFD_RELOC_FR30_12_PCREL
2928 ENUMDOC
2929   This is a 16 bit reloc for the FR30 that stores a 12 bit pc relative
2930   short offset into 11 bits.
2931
2932 ENUM
2933   BFD_RELOC_MCORE_PCREL_IMM8BY4
2934 ENUMX
2935   BFD_RELOC_MCORE_PCREL_IMM11BY2
2936 ENUMX
2937   BFD_RELOC_MCORE_PCREL_IMM4BY2
2938 ENUMX
2939   BFD_RELOC_MCORE_PCREL_32
2940 ENUMX
2941   BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2
2942 ENUMX
2943   BFD_RELOC_MCORE_RVA
2944 ENUMDOC
2945   Motorola Mcore relocations.
2946
2947 ENUM
2948   BFD_RELOC_MMIX_GETA
2949 ENUMX
2950   BFD_RELOC_MMIX_GETA_1
2951 ENUMX
2952   BFD_RELOC_MMIX_GETA_2
2953 ENUMX
2954   BFD_RELOC_MMIX_GETA_3
2955 ENUMDOC
2956   These are relocations for the GETA instruction.
2957 ENUM
2958   BFD_RELOC_MMIX_CBRANCH
2959 ENUMX
2960   BFD_RELOC_MMIX_CBRANCH_J
2961 ENUMX
2962   BFD_RELOC_MMIX_CBRANCH_1
2963 ENUMX
2964   BFD_RELOC_MMIX_CBRANCH_2
2965 ENUMX
2966   BFD_RELOC_MMIX_CBRANCH_3
2967 ENUMDOC
2968   These are relocations for a conditional branch instruction.
2969 ENUM
2970   BFD_RELOC_MMIX_PUSHJ
2971 ENUMX
2972   BFD_RELOC_MMIX_PUSHJ_1
2973 ENUMX
2974   BFD_RELOC_MMIX_PUSHJ_2
2975 ENUMX
2976   BFD_RELOC_MMIX_PUSHJ_3
2977 ENUMDOC
2978   These are relocations for the PUSHJ instruction.
2979 ENUM
2980   BFD_RELOC_MMIX_JMP
2981 ENUMX
2982   BFD_RELOC_MMIX_JMP_1
2983 ENUMX
2984   BFD_RELOC_MMIX_JMP_2
2985 ENUMX
2986   BFD_RELOC_MMIX_JMP_3
2987 ENUMDOC
2988   These are relocations for the JMP instruction.
2989 ENUM
2990   BFD_RELOC_MMIX_ADDR19
2991 ENUMDOC
2992   This is a relocation for a relative address as in a GETA instruction or
2993   a branch.
2994 ENUM
2995   BFD_RELOC_MMIX_ADDR27
2996 ENUMDOC
2997   This is a relocation for a relative address as in a JMP instruction.
2998 ENUM
2999   BFD_RELOC_MMIX_REG_OR_BYTE
3000 ENUMDOC
3001   This is a relocation for an instruction field that may be a general
3002   register or a value 0..255.
3003 ENUM
3004   BFD_RELOC_MMIX_REG
3005 ENUMDOC
3006   This is a relocation for an instruction field that may be a general
3007   register.
3008 ENUM
3009   BFD_RELOC_MMIX_BASE_PLUS_OFFSET
3010 ENUMDOC
3011   This is a relocation for two instruction fields holding a register and
3012   an offset, the equivalent of the relocation.
3013 ENUM
3014   BFD_RELOC_MMIX_LOCAL
3015 ENUMDOC
3016   This relocation is an assertion that the expression is not allocated as
3017   a global register.  It does not modify contents.
3018
3019 ENUM
3020   BFD_RELOC_AVR_7_PCREL
3021 ENUMDOC
3022   This is a 16 bit reloc for the AVR that stores 8 bit pc relative
3023   short offset into 7 bits.
3024 ENUM
3025   BFD_RELOC_AVR_13_PCREL
3026 ENUMDOC
3027   This is a 16 bit reloc for the AVR that stores 13 bit pc relative
3028   short offset into 12 bits.
3029 ENUM
3030   BFD_RELOC_AVR_16_PM
3031 ENUMDOC
3032   This is a 16 bit reloc for the AVR that stores 17 bit value (usually
3033   program memory address) into 16 bits.
3034 ENUM
3035   BFD_RELOC_AVR_LO8_LDI
3036 ENUMDOC
3037   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
3038   data memory address) into 8 bit immediate value of LDI insn.
3039 ENUM
3040   BFD_RELOC_AVR_HI8_LDI
3041 ENUMDOC
3042   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
3043   of data memory address) into 8 bit immediate value of LDI insn.
3044 ENUM
3045   BFD_RELOC_AVR_HH8_LDI
3046 ENUMDOC
3047   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
3048   of program memory address) into 8 bit immediate value of LDI insn.
3049 ENUM
3050   BFD_RELOC_AVR_LO8_LDI_NEG
3051 ENUMDOC
3052   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3053   (usually data memory address) into 8 bit immediate value of SUBI insn.
3054 ENUM
3055   BFD_RELOC_AVR_HI8_LDI_NEG
3056 ENUMDOC
3057   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3058   (high 8 bit of data memory address) into 8 bit immediate value of
3059   SUBI insn.
3060 ENUM
3061   BFD_RELOC_AVR_HH8_LDI_NEG
3062 ENUMDOC
3063   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3064   (most high 8 bit of program memory address) into 8 bit immediate value
3065   of LDI or SUBI insn.
3066 ENUM
3067   BFD_RELOC_AVR_LO8_LDI_PM
3068 ENUMDOC
3069   This is a 16 bit reloc for the AVR that stores 8 bit value (usually
3070   command address) into 8 bit immediate value of LDI insn.
3071 ENUM
3072   BFD_RELOC_AVR_HI8_LDI_PM
3073 ENUMDOC
3074   This is a 16 bit reloc for the AVR that stores 8 bit value (high 8 bit
3075   of command address) into 8 bit immediate value of LDI insn.
3076 ENUM
3077   BFD_RELOC_AVR_HH8_LDI_PM
3078 ENUMDOC
3079   This is a 16 bit reloc for the AVR that stores 8 bit value (most high 8 bit
3080   of command address) into 8 bit immediate value of LDI insn.
3081 ENUM
3082   BFD_RELOC_AVR_LO8_LDI_PM_NEG
3083 ENUMDOC
3084   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3085   (usually command address) into 8 bit immediate value of SUBI insn.
3086 ENUM
3087   BFD_RELOC_AVR_HI8_LDI_PM_NEG
3088 ENUMDOC
3089   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3090   (high 8 bit of 16 bit command address) into 8 bit immediate value
3091   of SUBI insn.
3092 ENUM
3093   BFD_RELOC_AVR_HH8_LDI_PM_NEG
3094 ENUMDOC
3095   This is a 16 bit reloc for the AVR that stores negated 8 bit value
3096   (high 6 bit of 22 bit command address) into 8 bit immediate
3097   value of SUBI insn.
3098 ENUM
3099   BFD_RELOC_AVR_CALL
3100 ENUMDOC
3101   This is a 32 bit reloc for the AVR that stores 23 bit value
3102   into 22 bits.
3103
3104 ENUM
3105   BFD_RELOC_390_12
3106 ENUMDOC
3107    Direct 12 bit.
3108 ENUM
3109   BFD_RELOC_390_GOT12
3110 ENUMDOC
3111   12 bit GOT offset.
3112 ENUM
3113   BFD_RELOC_390_PLT32
3114 ENUMDOC
3115   32 bit PC relative PLT address.
3116 ENUM
3117   BFD_RELOC_390_COPY
3118 ENUMDOC
3119   Copy symbol at runtime.
3120 ENUM
3121   BFD_RELOC_390_GLOB_DAT
3122 ENUMDOC
3123   Create GOT entry.
3124 ENUM
3125   BFD_RELOC_390_JMP_SLOT
3126 ENUMDOC
3127   Create PLT entry.
3128 ENUM
3129   BFD_RELOC_390_RELATIVE
3130 ENUMDOC
3131   Adjust by program base.
3132 ENUM
3133   BFD_RELOC_390_GOTPC
3134 ENUMDOC
3135   32 bit PC relative offset to GOT.
3136 ENUM
3137   BFD_RELOC_390_GOT16
3138 ENUMDOC
3139   16 bit GOT offset.
3140 ENUM
3141   BFD_RELOC_390_PC16DBL
3142 ENUMDOC
3143   PC relative 16 bit shifted by 1.
3144 ENUM
3145   BFD_RELOC_390_PLT16DBL
3146 ENUMDOC
3147   16 bit PC rel. PLT shifted by 1.
3148 ENUM
3149   BFD_RELOC_390_PC32DBL
3150 ENUMDOC
3151   PC relative 32 bit shifted by 1.
3152 ENUM
3153   BFD_RELOC_390_PLT32DBL
3154 ENUMDOC
3155   32 bit PC rel. PLT shifted by 1.
3156 ENUM
3157   BFD_RELOC_390_GOTPCDBL
3158 ENUMDOC
3159   32 bit PC rel. GOT shifted by 1.
3160 ENUM
3161   BFD_RELOC_390_GOT64
3162 ENUMDOC
3163   64 bit GOT offset.
3164 ENUM
3165   BFD_RELOC_390_PLT64
3166 ENUMDOC
3167   64 bit PC relative PLT address.
3168 ENUM
3169   BFD_RELOC_390_GOTENT
3170 ENUMDOC
3171   32 bit rel. offset to GOT entry.
3172
3173 ENUM
3174   BFD_RELOC_IP2K_FR9
3175 ENUMDOC
3176   Scenix IP2K - 9-bit register number / data address
3177 ENUM
3178   BFD_RELOC_IP2K_BANK
3179 ENUMDOC
3180   Scenix IP2K - 4-bit register/data bank number
3181 ENUM
3182   BFD_RELOC_IP2K_ADDR16CJP
3183 ENUMDOC
3184   Scenix IP2K - low 13 bits of instruction word address
3185 ENUM
3186   BFD_RELOC_IP2K_PAGE3
3187 ENUMDOC
3188   Scenix IP2K - high 3 bits of instruction word address
3189 ENUM
3190   BFD_RELOC_IP2K_LO8DATA
3191 ENUMX
3192   BFD_RELOC_IP2K_HI8DATA
3193 ENUMX
3194   BFD_RELOC_IP2K_EX8DATA
3195 ENUMDOC
3196   Scenix IP2K - ext/low/high 8 bits of data address
3197 ENUM
3198   BFD_RELOC_IP2K_LO8INSN
3199 ENUMX
3200   BFD_RELOC_IP2K_HI8INSN
3201 ENUMDOC
3202   Scenix IP2K - low/high 8 bits of instruction word address
3203 ENUM
3204   BFD_RELOC_IP2K_PC_SKIP
3205 ENUMDOC
3206   Scenix IP2K - even/odd PC modifier to modify snb pcl.0
3207 ENUM
3208   BFD_RELOC_IP2K_TEXT
3209 ENUMDOC
3210   Scenix IP2K - 16 bit word address in text section.
3211 ENUM
3212   BFD_RELOC_IP2K_FR_OFFSET
3213 ENUMDOC
3214   Scenix IP2K - 7-bit sp or dp offset
3215 ENUM
3216   BFD_RELOC_VPE4KMATH_DATA
3217 ENUMX
3218   BFD_RELOC_VPE4KMATH_INSN
3219 ENUMDOC
3220   Scenix VPE4K coprocessor - data/insn-space addressing
3221
3222 ENUM
3223   BFD_RELOC_VTABLE_INHERIT
3224 ENUMX
3225   BFD_RELOC_VTABLE_ENTRY
3226 ENUMDOC
3227   These two relocations are used by the linker to determine which of
3228   the entries in a C++ virtual function table are actually used.  When
3229   the --gc-sections option is given, the linker will zero out the entries
3230   that are not used, so that the code for those functions need not be
3231   included in the output.
3232
3233   VTABLE_INHERIT is a zero-space relocation used to describe to the
3234   linker the inheritence tree of a C++ virtual function table.  The
3235   relocation's symbol should be the parent class' vtable, and the
3236   relocation should be located at the child vtable.
3237
3238   VTABLE_ENTRY is a zero-space relocation that describes the use of a
3239   virtual function table entry.  The reloc's symbol should refer to the
3240   table of the class mentioned in the code.  Off of that base, an offset
3241   describes the entry that is being used.  For Rela hosts, this offset
3242   is stored in the reloc's addend.  For Rel hosts, we are forced to put
3243   this offset in the reloc's section offset.
3244
3245 ENUM
3246   BFD_RELOC_IA64_IMM14
3247 ENUMX
3248   BFD_RELOC_IA64_IMM22
3249 ENUMX
3250   BFD_RELOC_IA64_IMM64
3251 ENUMX
3252   BFD_RELOC_IA64_DIR32MSB
3253 ENUMX
3254   BFD_RELOC_IA64_DIR32LSB
3255 ENUMX
3256   BFD_RELOC_IA64_DIR64MSB
3257 ENUMX
3258   BFD_RELOC_IA64_DIR64LSB
3259 ENUMX
3260   BFD_RELOC_IA64_GPREL22
3261 ENUMX
3262   BFD_RELOC_IA64_GPREL64I
3263 ENUMX
3264   BFD_RELOC_IA64_GPREL32MSB
3265 ENUMX
3266   BFD_RELOC_IA64_GPREL32LSB
3267 ENUMX
3268   BFD_RELOC_IA64_GPREL64MSB
3269 ENUMX
3270   BFD_RELOC_IA64_GPREL64LSB
3271 ENUMX
3272   BFD_RELOC_IA64_LTOFF22
3273 ENUMX
3274   BFD_RELOC_IA64_LTOFF64I
3275 ENUMX
3276   BFD_RELOC_IA64_PLTOFF22
3277 ENUMX
3278   BFD_RELOC_IA64_PLTOFF64I
3279 ENUMX
3280   BFD_RELOC_IA64_PLTOFF64MSB
3281 ENUMX
3282   BFD_RELOC_IA64_PLTOFF64LSB
3283 ENUMX
3284   BFD_RELOC_IA64_FPTR64I
3285 ENUMX
3286   BFD_RELOC_IA64_FPTR32MSB
3287 ENUMX
3288   BFD_RELOC_IA64_FPTR32LSB
3289 ENUMX
3290   BFD_RELOC_IA64_FPTR64MSB
3291 ENUMX
3292   BFD_RELOC_IA64_FPTR64LSB
3293 ENUMX
3294   BFD_RELOC_IA64_PCREL21B
3295 ENUMX
3296   BFD_RELOC_IA64_PCREL21BI
3297 ENUMX
3298   BFD_RELOC_IA64_PCREL21M
3299 ENUMX
3300   BFD_RELOC_IA64_PCREL21F
3301 ENUMX
3302   BFD_RELOC_IA64_PCREL22
3303 ENUMX
3304   BFD_RELOC_IA64_PCREL60B
3305 ENUMX
3306   BFD_RELOC_IA64_PCREL64I
3307 ENUMX
3308   BFD_RELOC_IA64_PCREL32MSB
3309 ENUMX
3310   BFD_RELOC_IA64_PCREL32LSB
3311 ENUMX
3312   BFD_RELOC_IA64_PCREL64MSB
3313 ENUMX
3314   BFD_RELOC_IA64_PCREL64LSB
3315 ENUMX
3316   BFD_RELOC_IA64_LTOFF_FPTR22
3317 ENUMX
3318   BFD_RELOC_IA64_LTOFF_FPTR64I
3319 ENUMX
3320   BFD_RELOC_IA64_LTOFF_FPTR32MSB
3321 ENUMX
3322   BFD_RELOC_IA64_LTOFF_FPTR32LSB
3323 ENUMX
3324   BFD_RELOC_IA64_LTOFF_FPTR64MSB
3325 ENUMX
3326   BFD_RELOC_IA64_LTOFF_FPTR64LSB
3327 ENUMX
3328   BFD_RELOC_IA64_SEGREL32MSB
3329 ENUMX
3330   BFD_RELOC_IA64_SEGREL32LSB
3331 ENUMX
3332   BFD_RELOC_IA64_SEGREL64MSB
3333 ENUMX
3334   BFD_RELOC_IA64_SEGREL64LSB
3335 ENUMX
3336   BFD_RELOC_IA64_SECREL32MSB
3337 ENUMX
3338   BFD_RELOC_IA64_SECREL32LSB
3339 ENUMX
3340   BFD_RELOC_IA64_SECREL64MSB
3341 ENUMX
3342   BFD_RELOC_IA64_SECREL64LSB
3343 ENUMX
3344   BFD_RELOC_IA64_REL32MSB
3345 ENUMX
3346   BFD_RELOC_IA64_REL32LSB
3347 ENUMX
3348   BFD_RELOC_IA64_REL64MSB
3349 ENUMX
3350   BFD_RELOC_IA64_REL64LSB
3351 ENUMX
3352   BFD_RELOC_IA64_LTV32MSB
3353 ENUMX
3354   BFD_RELOC_IA64_LTV32LSB
3355 ENUMX
3356   BFD_RELOC_IA64_LTV64MSB
3357 ENUMX
3358   BFD_RELOC_IA64_LTV64LSB
3359 ENUMX
3360   BFD_RELOC_IA64_IPLTMSB
3361 ENUMX
3362   BFD_RELOC_IA64_IPLTLSB
3363 ENUMX
3364   BFD_RELOC_IA64_COPY
3365 ENUMX
3366   BFD_RELOC_IA64_LTOFF22X
3367 ENUMX
3368   BFD_RELOC_IA64_LDXMOV
3369 ENUMX
3370   BFD_RELOC_IA64_TPREL14
3371 ENUMX
3372   BFD_RELOC_IA64_TPREL22
3373 ENUMX
3374   BFD_RELOC_IA64_TPREL64I
3375 ENUMX
3376   BFD_RELOC_IA64_TPREL64MSB
3377 ENUMX
3378   BFD_RELOC_IA64_TPREL64LSB
3379 ENUMX
3380   BFD_RELOC_IA64_LTOFF_TPREL22
3381 ENUMX
3382   BFD_RELOC_IA64_DTPMOD64MSB
3383 ENUMX
3384   BFD_RELOC_IA64_DTPMOD64LSB
3385 ENUMX
3386   BFD_RELOC_IA64_LTOFF_DTPMOD22
3387 ENUMX
3388   BFD_RELOC_IA64_DTPREL14
3389 ENUMX
3390   BFD_RELOC_IA64_DTPREL22
3391 ENUMX
3392   BFD_RELOC_IA64_DTPREL64I
3393 ENUMX
3394   BFD_RELOC_IA64_DTPREL32MSB
3395 ENUMX
3396   BFD_RELOC_IA64_DTPREL32LSB
3397 ENUMX
3398   BFD_RELOC_IA64_DTPREL64MSB
3399 ENUMX
3400   BFD_RELOC_IA64_DTPREL64LSB
3401 ENUMX
3402   BFD_RELOC_IA64_LTOFF_DTPREL22
3403 ENUMDOC
3404   Intel IA64 Relocations.
3405
3406 ENUM
3407   BFD_RELOC_M68HC11_HI8
3408 ENUMDOC
3409   Motorola 68HC11 reloc.
3410   This is the 8 bit high part of an absolute address.
3411 ENUM
3412   BFD_RELOC_M68HC11_LO8
3413 ENUMDOC
3414   Motorola 68HC11 reloc.
3415   This is the 8 bit low part of an absolute address.
3416 ENUM
3417   BFD_RELOC_M68HC11_3B
3418 ENUMDOC
3419   Motorola 68HC11 reloc.
3420   This is the 3 bit of a value.
3421 ENUM
3422   BFD_RELOC_M68HC11_RL_JUMP
3423 ENUMDOC
3424   Motorola 68HC11 reloc.
3425   This reloc marks the beginning of a jump/call instruction.
3426   It is used for linker relaxation to correctly identify beginning
3427   of instruction and change some branchs to use PC-relative
3428   addressing mode.
3429 ENUM
3430   BFD_RELOC_M68HC11_RL_GROUP
3431 ENUMDOC
3432   Motorola 68HC11 reloc.
3433   This reloc marks a group of several instructions that gcc generates
3434   and for which the linker relaxation pass can modify and/or remove
3435   some of them.
3436 ENUM
3437   BFD_RELOC_M68HC11_LO16
3438 ENUMDOC
3439   Motorola 68HC11 reloc.
3440   This is the 16-bit lower part of an address.  It is used for 'call'
3441   instruction to specify the symbol address without any special
3442   transformation (due to memory bank window).
3443 ENUM
3444   BFD_RELOC_M68HC11_PAGE
3445 ENUMDOC
3446   Motorola 68HC11 reloc.
3447   This is a 8-bit reloc that specifies the page number of an address.
3448   It is used by 'call' instruction to specify the page number of
3449   the symbol.
3450 ENUM
3451   BFD_RELOC_M68HC11_24
3452 ENUMDOC
3453   Motorola 68HC11 reloc.
3454   This is a 24-bit reloc that represents the address with a 16-bit
3455   value and a 8-bit page number.  The symbol address is transformed
3456   to follow the 16K memory bank of 68HC12 (seen as mapped in the window).
3457
3458 ENUM
3459   BFD_RELOC_CRIS_BDISP8
3460 ENUMX
3461   BFD_RELOC_CRIS_UNSIGNED_5
3462 ENUMX
3463   BFD_RELOC_CRIS_SIGNED_6
3464 ENUMX
3465   BFD_RELOC_CRIS_UNSIGNED_6
3466 ENUMX
3467   BFD_RELOC_CRIS_UNSIGNED_4
3468 ENUMDOC
3469   These relocs are only used within the CRIS assembler.  They are not
3470   (at present) written to any object files.
3471 ENUM
3472   BFD_RELOC_CRIS_COPY
3473 ENUMX
3474   BFD_RELOC_CRIS_GLOB_DAT
3475 ENUMX
3476   BFD_RELOC_CRIS_JUMP_SLOT
3477 ENUMX
3478   BFD_RELOC_CRIS_RELATIVE
3479 ENUMDOC
3480   Relocs used in ELF shared libraries for CRIS.
3481 ENUM
3482   BFD_RELOC_CRIS_32_GOT
3483 ENUMDOC
3484   32-bit offset to symbol-entry within GOT.
3485 ENUM
3486   BFD_RELOC_CRIS_16_GOT
3487 ENUMDOC
3488   16-bit offset to symbol-entry within GOT.
3489 ENUM
3490   BFD_RELOC_CRIS_32_GOTPLT
3491 ENUMDOC
3492   32-bit offset to symbol-entry within GOT, with PLT handling.
3493 ENUM
3494   BFD_RELOC_CRIS_16_GOTPLT
3495 ENUMDOC
3496   16-bit offset to symbol-entry within GOT, with PLT handling.
3497 ENUM
3498   BFD_RELOC_CRIS_32_GOTREL
3499 ENUMDOC
3500   32-bit offset to symbol, relative to GOT.
3501 ENUM
3502   BFD_RELOC_CRIS_32_PLT_GOTREL
3503 ENUMDOC
3504   32-bit offset to symbol with PLT entry, relative to GOT.
3505 ENUM
3506   BFD_RELOC_CRIS_32_PLT_PCREL
3507 ENUMDOC
3508   32-bit offset to symbol with PLT entry, relative to this relocation.
3509
3510 ENUM
3511   BFD_RELOC_860_COPY
3512 ENUMX
3513   BFD_RELOC_860_GLOB_DAT
3514 ENUMX
3515   BFD_RELOC_860_JUMP_SLOT
3516 ENUMX
3517   BFD_RELOC_860_RELATIVE
3518 ENUMX
3519   BFD_RELOC_860_PC26
3520 ENUMX
3521   BFD_RELOC_860_PLT26
3522 ENUMX
3523   BFD_RELOC_860_PC16
3524 ENUMX
3525   BFD_RELOC_860_LOW0
3526 ENUMX
3527   BFD_RELOC_860_SPLIT0
3528 ENUMX
3529   BFD_RELOC_860_LOW1
3530 ENUMX
3531   BFD_RELOC_860_SPLIT1
3532 ENUMX
3533   BFD_RELOC_860_LOW2
3534 ENUMX
3535   BFD_RELOC_860_SPLIT2
3536 ENUMX
3537   BFD_RELOC_860_LOW3
3538 ENUMX
3539   BFD_RELOC_860_LOGOT0
3540 ENUMX
3541   BFD_RELOC_860_SPGOT0
3542 ENUMX
3543   BFD_RELOC_860_LOGOT1
3544 ENUMX
3545   BFD_RELOC_860_SPGOT1
3546 ENUMX
3547   BFD_RELOC_860_LOGOTOFF0
3548 ENUMX
3549   BFD_RELOC_860_SPGOTOFF0
3550 ENUMX
3551   BFD_RELOC_860_LOGOTOFF1
3552 ENUMX
3553   BFD_RELOC_860_SPGOTOFF1
3554 ENUMX
3555   BFD_RELOC_860_LOGOTOFF2
3556 ENUMX
3557   BFD_RELOC_860_LOGOTOFF3
3558 ENUMX
3559   BFD_RELOC_860_LOPC
3560 ENUMX
3561   BFD_RELOC_860_HIGHADJ
3562 ENUMX
3563   BFD_RELOC_860_HAGOT
3564 ENUMX
3565   BFD_RELOC_860_HAGOTOFF
3566 ENUMX
3567   BFD_RELOC_860_HAPC
3568 ENUMX
3569   BFD_RELOC_860_HIGH
3570 ENUMX
3571   BFD_RELOC_860_HIGOT
3572 ENUMX
3573   BFD_RELOC_860_HIGOTOFF
3574 ENUMDOC
3575   Intel i860 Relocations.
3576
3577 ENUM
3578   BFD_RELOC_OPENRISC_ABS_26
3579 ENUMX
3580   BFD_RELOC_OPENRISC_REL_26
3581 ENUMDOC
3582   OpenRISC Relocations.
3583
3584 ENUM
3585   BFD_RELOC_H8_DIR16A8
3586 ENUMX
3587   BFD_RELOC_H8_DIR16R8
3588 ENUMX
3589   BFD_RELOC_H8_DIR24A8
3590 ENUMX
3591   BFD_RELOC_H8_DIR24R8
3592 ENUMX
3593   BFD_RELOC_H8_DIR32A16
3594 ENUMDOC
3595   H8 elf Relocations.
3596
3597 ENUM
3598   BFD_RELOC_XSTORMY16_REL_12
3599 ENUMX
3600   BFD_RELOC_XSTORMY16_12
3601 ENUMX
3602   BFD_RELOC_XSTORMY16_24
3603 ENUMX
3604   BFD_RELOC_XSTORMY16_FPTR16
3605 ENUMDOC
3606   Sony Xstormy16 Relocations.
3607
3608 ENUM
3609   BFD_RELOC_VAX_GLOB_DAT
3610 ENUMX
3611   BFD_RELOC_VAX_JMP_SLOT
3612 ENUMX
3613   BFD_RELOC_VAX_RELATIVE
3614 ENUMDOC
3615   Relocations used by VAX ELF.
3616
3617 ENDSENUM
3618   BFD_RELOC_UNUSED
3619 CODE_FRAGMENT
3620 .
3621 .typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
3622 */
3623
3624 /*
3625 FUNCTION
3626         bfd_reloc_type_lookup
3627
3628 SYNOPSIS
3629         reloc_howto_type *
3630         bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code);
3631
3632 DESCRIPTION
3633         Return a pointer to a howto structure which, when
3634         invoked, will perform the relocation @var{code} on data from the
3635         architecture noted.
3636
3637 */
3638
3639 reloc_howto_type *
3640 bfd_reloc_type_lookup (abfd, code)
3641      bfd *abfd;
3642      bfd_reloc_code_real_type code;
3643 {
3644   return BFD_SEND (abfd, reloc_type_lookup, (abfd, code));
3645 }
3646
3647 static reloc_howto_type bfd_howto_32 =
3648 HOWTO (0, 00, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "VRT32", FALSE, 0xffffffff, 0xffffffff, TRUE);
3649
3650 /*
3651 INTERNAL_FUNCTION
3652         bfd_default_reloc_type_lookup
3653
3654 SYNOPSIS
3655         reloc_howto_type *bfd_default_reloc_type_lookup
3656         (bfd *abfd, bfd_reloc_code_real_type  code);
3657
3658 DESCRIPTION
3659         Provides a default relocation lookup routine for any architecture.
3660
3661 */
3662
3663 reloc_howto_type *
3664 bfd_default_reloc_type_lookup (abfd, code)
3665      bfd *abfd;
3666      bfd_reloc_code_real_type code;
3667 {
3668   switch (code)
3669     {
3670     case BFD_RELOC_CTOR:
3671       /* The type of reloc used in a ctor, which will be as wide as the
3672          address - so either a 64, 32, or 16 bitter.  */
3673       switch (bfd_get_arch_info (abfd)->bits_per_address)
3674         {
3675         case 64:
3676           BFD_FAIL ();
3677         case 32:
3678           return &bfd_howto_32;
3679         case 16:
3680           BFD_FAIL ();
3681         default:
3682           BFD_FAIL ();
3683         }
3684     default:
3685       BFD_FAIL ();
3686     }
3687   return (reloc_howto_type *) NULL;
3688 }
3689
3690 /*
3691 FUNCTION
3692         bfd_get_reloc_code_name
3693
3694 SYNOPSIS
3695         const char *bfd_get_reloc_code_name (bfd_reloc_code_real_type code);
3696
3697 DESCRIPTION
3698         Provides a printable name for the supplied relocation code.
3699         Useful mainly for printing error messages.
3700 */
3701
3702 const char *
3703 bfd_get_reloc_code_name (code)
3704      bfd_reloc_code_real_type code;
3705 {
3706   if ((int) code > (int) BFD_RELOC_UNUSED)
3707     return 0;
3708   return bfd_reloc_code_real_names[(int)code];
3709 }
3710
3711 /*
3712 INTERNAL_FUNCTION
3713         bfd_generic_relax_section
3714
3715 SYNOPSIS
3716         bfd_boolean bfd_generic_relax_section
3717          (bfd *abfd,
3718           asection *section,
3719           struct bfd_link_info *,
3720           bfd_boolean *);
3721
3722 DESCRIPTION
3723         Provides default handling for relaxing for back ends which
3724         don't do relaxing -- i.e., does nothing.
3725 */
3726
3727 bfd_boolean
3728 bfd_generic_relax_section (abfd, section, link_info, again)
3729      bfd *abfd ATTRIBUTE_UNUSED;
3730      asection *section ATTRIBUTE_UNUSED;
3731      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3732      bfd_boolean *again;
3733 {
3734   *again = FALSE;
3735   return TRUE;
3736 }
3737
3738 /*
3739 INTERNAL_FUNCTION
3740         bfd_generic_gc_sections
3741
3742 SYNOPSIS
3743         bfd_boolean bfd_generic_gc_sections
3744          (bfd *, struct bfd_link_info *);
3745
3746 DESCRIPTION
3747         Provides default handling for relaxing for back ends which
3748         don't do section gc -- i.e., does nothing.
3749 */
3750
3751 bfd_boolean
3752 bfd_generic_gc_sections (abfd, link_info)
3753      bfd *abfd ATTRIBUTE_UNUSED;
3754      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3755 {
3756   return TRUE;
3757 }
3758
3759 /*
3760 INTERNAL_FUNCTION
3761         bfd_generic_merge_sections
3762
3763 SYNOPSIS
3764         bfd_boolean bfd_generic_merge_sections
3765          (bfd *, struct bfd_link_info *);
3766
3767 DESCRIPTION
3768         Provides default handling for SEC_MERGE section merging for back ends
3769         which don't have SEC_MERGE support -- i.e., does nothing.
3770 */
3771
3772 bfd_boolean
3773 bfd_generic_merge_sections (abfd, link_info)
3774      bfd *abfd ATTRIBUTE_UNUSED;
3775      struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
3776 {
3777   return TRUE;
3778 }
3779
3780 /*
3781 INTERNAL_FUNCTION
3782         bfd_generic_get_relocated_section_contents
3783
3784 SYNOPSIS
3785         bfd_byte *
3786            bfd_generic_get_relocated_section_contents (bfd *abfd,
3787              struct bfd_link_info *link_info,
3788              struct bfd_link_order *link_order,
3789              bfd_byte *data,
3790              bfd_boolean relocateable,
3791              asymbol **symbols);
3792
3793 DESCRIPTION
3794         Provides default handling of relocation effort for back ends
3795         which can't be bothered to do it efficiently.
3796
3797 */
3798
3799 bfd_byte *
3800 bfd_generic_get_relocated_section_contents (abfd, link_info, link_order, data,
3801                                             relocateable, symbols)
3802      bfd *abfd;
3803      struct bfd_link_info *link_info;
3804      struct bfd_link_order *link_order;
3805      bfd_byte *data;
3806      bfd_boolean relocateable;
3807      asymbol **symbols;
3808 {
3809   /* Get enough memory to hold the stuff.  */
3810   bfd *input_bfd = link_order->u.indirect.section->owner;
3811   asection *input_section = link_order->u.indirect.section;
3812
3813   long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
3814   arelent **reloc_vector = NULL;
3815   long reloc_count;
3816
3817   if (reloc_size < 0)
3818     goto error_return;
3819
3820   reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
3821   if (reloc_vector == NULL && reloc_size != 0)
3822     goto error_return;
3823
3824   /* Read in the section.  */
3825   if (!bfd_get_section_contents (input_bfd,
3826                                  input_section,
3827                                  (PTR) data,
3828                                  (bfd_vma) 0,
3829                                  input_section->_raw_size))
3830     goto error_return;
3831
3832   /* We're not relaxing the section, so just copy the size info.  */
3833   input_section->_cooked_size = input_section->_raw_size;
3834   input_section->reloc_done = TRUE;
3835
3836   reloc_count = bfd_canonicalize_reloc (input_bfd,
3837                                         input_section,
3838                                         reloc_vector,
3839                                         symbols);
3840   if (reloc_count < 0)
3841     goto error_return;
3842
3843   if (reloc_count > 0)
3844     {
3845       arelent **parent;
3846       for (parent = reloc_vector; *parent != (arelent *) NULL;
3847            parent++)
3848         {
3849           char *error_message = (char *) NULL;
3850           bfd_reloc_status_type r =
3851             bfd_perform_relocation (input_bfd,
3852                                     *parent,
3853                                     (PTR) data,
3854                                     input_section,
3855                                     relocateable ? abfd : (bfd *) NULL,
3856                                     &error_message);
3857
3858           if (relocateable)
3859             {
3860               asection *os = input_section->output_section;
3861
3862               /* A partial link, so keep the relocs.  */
3863               os->orelocation[os->reloc_count] = *parent;
3864               os->reloc_count++;
3865             }
3866
3867           if (r != bfd_reloc_ok)
3868             {
3869               switch (r)
3870                 {
3871                 case bfd_reloc_undefined:
3872                   if (!((*link_info->callbacks->undefined_symbol)
3873                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3874                          input_bfd, input_section, (*parent)->address,
3875                          TRUE)))
3876                     goto error_return;
3877                   break;
3878                 case bfd_reloc_dangerous:
3879                   BFD_ASSERT (error_message != (char *) NULL);
3880                   if (!((*link_info->callbacks->reloc_dangerous)
3881                         (link_info, error_message, input_bfd, input_section,
3882                          (*parent)->address)))
3883                     goto error_return;
3884                   break;
3885                 case bfd_reloc_overflow:
3886                   if (!((*link_info->callbacks->reloc_overflow)
3887                         (link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
3888                          (*parent)->howto->name, (*parent)->addend,
3889                          input_bfd, input_section, (*parent)->address)))
3890                     goto error_return;
3891                   break;
3892                 case bfd_reloc_outofrange:
3893                 default:
3894                   abort ();
3895                   break;
3896                 }
3897
3898             }
3899         }
3900     }
3901   if (reloc_vector != NULL)
3902     free (reloc_vector);
3903   return data;
3904
3905 error_return:
3906   if (reloc_vector != NULL)
3907     free (reloc_vector);
3908   return NULL;
3909 }