bfd/coff-i386.c

   1 /* BFD back-end for Intel 386 COFF files.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004, 2007
   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "sysdep.h"
  25 #include "bfd.h"
  26 #include "libbfd.h"
  27
  28 #include "coff/i386.h"
  29
  30 #include "coff/internal.h"
  31
  32 #ifdef COFF_WITH_PE
  33 #include "coff/pe.h"
  34 #endif
  35
  36 #ifdef COFF_GO32_EXE
  37 #include "coff/go32exe.h"
  38 #endif
  39
  40 #include "libcoff.h"
  41
  42 static bfd_reloc_status_type coff_i386_reloc
  43   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
  44 static reloc_howto_type *coff_i386_rtype_to_howto
  45   PARAMS ((bfd *, asection *, struct internal_reloc *,
  46            struct coff_link_hash_entry *, struct internal_syment *,
  47            bfd_vma *));
  48 static reloc_howto_type *coff_i386_reloc_type_lookup
  49   PARAMS ((bfd *, bfd_reloc_code_real_type));
  50
  51 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
  52 /* The page size is a guess based on ELF.  */
  53
  54 #define COFF_PAGE_SIZE 0x1000
  55
  56 /* For some reason when using i386 COFF the value stored in the .text
  57    section for a reference to a common symbol is the value itself plus
  58    any desired offset.  Ian Taylor, Cygnus Support.  */
  59
  60 /* If we are producing relocatable output, we need to do some
  61    adjustments to the object file that are not done by the
  62    bfd_perform_relocation function.  This function is called by every
  63    reloc type to make any required adjustments.  */
  64
  65 static bfd_reloc_status_type
  66 coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
  67                  error_message)
  68      bfd *abfd;
  69      arelent *reloc_entry;
  70      asymbol *symbol;
  71      PTR data;
  72      asection *input_section ATTRIBUTE_UNUSED;
  73      bfd *output_bfd;
  74      char **error_message ATTRIBUTE_UNUSED;
  75 {
  76   symvalue diff;
  77
  78 #ifndef COFF_WITH_PE
  79   if (output_bfd == (bfd *) NULL)
  80     return bfd_reloc_continue;
  81 #endif
  82
  83   if (bfd_is_com_section (symbol->section))
  84     {
  85 #ifndef COFF_WITH_PE
  86       /* We are relocating a common symbol.  The current value in the
  87          object file is ORIG + OFFSET, where ORIG is the value of the
  88          common symbol as seen by the object file when it was compiled
  89          (this may be zero if the symbol was undefined) and OFFSET is
  90          the offset into the common symbol (normally zero, but may be
  91          non-zero when referring to a field in a common structure).
  92          ORIG is the negative of reloc_entry->addend, which is set by
  93          the CALC_ADDEND macro below.  We want to replace the value in
  94          the object file with NEW + OFFSET, where NEW is the value of
  95          the common symbol which we are going to put in the final
  96          object file.  NEW is symbol->value.  */
  97       diff = symbol->value + reloc_entry->addend;
  98 #else
  99       /* In PE mode, we do not offset the common symbol.  */
 100       diff = reloc_entry->addend;
 101 #endif
 102     }
 103   else
 104     {
 105       /* For some reason bfd_perform_relocation always effectively
 106          ignores the addend for a COFF target when producing
 107          relocatable output.  This seems to be always wrong for 386
 108          COFF, so we handle the addend here instead.  */
 109 #ifdef COFF_WITH_PE
 110       if (output_bfd == (bfd *) NULL)
 111         {
 112           reloc_howto_type *howto = reloc_entry->howto;
 113
 114           /* Although PC relative relocations are very similar between
 115              PE and non-PE formats, but they are off by 1 << howto->size
 116              bytes. For the external relocation, PE is very different
 117              from others. See md_apply_fix3 () in gas/config/tc-i386.c.
 118              When we link PE and non-PE object files together to
 119              generate a non-PE executable, we have to compensate it
 120              here.  */
 121           if (howto->pc_relative && howto->pcrel_offset)
 122             diff = -(1 << howto->size);
 123           else if (symbol->flags & BSF_WEAK)
 124             diff = reloc_entry->addend - symbol->value;
 125           else
 126             diff = -reloc_entry->addend;
 127         }
 128       else
 129 #endif
 130         diff = reloc_entry->addend;
 131     }
 132
 133 #ifdef COFF_WITH_PE
 134   /* FIXME: How should this case be handled?  */
 135   if (reloc_entry->howto->type == R_IMAGEBASE
 136       && output_bfd != NULL
 137       && bfd_get_flavour(output_bfd) == bfd_target_coff_flavour)
 138     diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
 139 #endif
 140
 141 #define DOIT(x) \
 142   x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
 143
 144     if (diff != 0)
 145       {
 146         reloc_howto_type *howto = reloc_entry->howto;
 147         unsigned char *addr = (unsigned char *) data + reloc_entry->address;
 148
 149         switch (howto->size)
 150           {
 151           case 0:
 152             {
 153               char x = bfd_get_8 (abfd, addr);
 154               DOIT (x);
 155               bfd_put_8 (abfd, x, addr);
 156             }
 157             break;
 158
 159           case 1:
 160             {
 161               short x = bfd_get_16 (abfd, addr);
 162               DOIT (x);
 163               bfd_put_16 (abfd, (bfd_vma) x, addr);
 164             }
 165             break;
 166
 167           case 2:
 168             {
 169               long x = bfd_get_32 (abfd, addr);
 170               DOIT (x);
 171               bfd_put_32 (abfd, (bfd_vma) x, addr);
 172             }
 173             break;
 174
 175           default:
 176             abort ();
 177           }
 178       }
 179
 180   /* Now let bfd_perform_relocation finish everything up.  */
 181   return bfd_reloc_continue;
 182 }
 183
 184 #ifdef COFF_WITH_PE
 185 /* Return TRUE if this relocation should appear in the output .reloc
 186    section.  */
 187
 188 static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
 189
 190 static bfd_boolean in_reloc_p (abfd, howto)
 191      bfd * abfd ATTRIBUTE_UNUSED;
 192      reloc_howto_type *howto;
 193 {
 194   return ! howto->pc_relative && howto->type != R_IMAGEBASE;
 195 }
 196 #endif /* COFF_WITH_PE */
 197
 198 #ifndef PCRELOFFSET
 199 #define PCRELOFFSET FALSE
 200 #endif
 201
 202 static reloc_howto_type howto_table[] =
 203 {
 204   EMPTY_HOWTO (0),
 205   EMPTY_HOWTO (1),
 206   EMPTY_HOWTO (2),
 207   EMPTY_HOWTO (3),
 208   EMPTY_HOWTO (4),
 209   EMPTY_HOWTO (5),
 210   HOWTO (R_DIR32,               /* type */
 211          0,                     /* rightshift */
 212          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 213          32,                    /* bitsize */
 214          FALSE,                 /* pc_relative */
 215          0,                     /* bitpos */
 216          complain_overflow_bitfield, /* complain_on_overflow */
 217          coff_i386_reloc,       /* special_function */
 218          "dir32",               /* name */
 219          TRUE,                  /* partial_inplace */
 220          0xffffffff,            /* src_mask */
 221          0xffffffff,            /* dst_mask */
 222          TRUE),                 /* pcrel_offset */
 223   /* PE IMAGE_REL_I386_DIR32NB relocation (7).  */
 224   HOWTO (R_IMAGEBASE,           /* type */
 225          0,                     /* rightshift */
 226          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 227          32,                    /* bitsize */
 228          FALSE,                 /* pc_relative */
 229          0,                     /* bitpos */
 230          complain_overflow_bitfield, /* complain_on_overflow */
 231          coff_i386_reloc,       /* special_function */
 232          "rva32",               /* name */
 233          TRUE,                  /* partial_inplace */
 234          0xffffffff,            /* src_mask */
 235          0xffffffff,            /* dst_mask */
 236          FALSE),                /* pcrel_offset */
 237   EMPTY_HOWTO (010),
 238   EMPTY_HOWTO (011),
 239   EMPTY_HOWTO (012),
 240 #ifdef COFF_WITH_PE
 241   /* 32-bit longword section relative relocation (013).  */
 242   HOWTO (R_SECREL32,            /* type */
 243          0,                     /* rightshift */
 244          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 245          32,                    /* bitsize */
 246          FALSE,                 /* pc_relative */
 247          0,                     /* bitpos */
 248          complain_overflow_bitfield, /* complain_on_overflow */
 249          coff_i386_reloc,       /* special_function */
 250          "secrel32",            /* name */
 251          TRUE,                  /* partial_inplace */
 252          0xffffffff,            /* src_mask */
 253          0xffffffff,            /* dst_mask */
 254          TRUE),                 /* pcrel_offset */
 255 #else
 256   EMPTY_HOWTO (013),
 257 #endif
 258   EMPTY_HOWTO (014),
 259   EMPTY_HOWTO (015),
 260   EMPTY_HOWTO (016),
 261   /* Byte relocation (017).  */
 262   HOWTO (R_RELBYTE,             /* type */
 263          0,                     /* rightshift */
 264          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 265          8,                     /* bitsize */
 266          FALSE,                 /* pc_relative */
 267          0,                     /* bitpos */
 268          complain_overflow_bitfield, /* complain_on_overflow */
 269          coff_i386_reloc,       /* special_function */
 270          "8",                   /* name */
 271          TRUE,                  /* partial_inplace */
 272          0x000000ff,            /* src_mask */
 273          0x000000ff,            /* dst_mask */
 274          PCRELOFFSET),          /* pcrel_offset */
 275   /* 16-bit word relocation (020).  */
 276   HOWTO (R_RELWORD,             /* type */
 277          0,                     /* rightshift */
 278          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 279          16,                    /* bitsize */
 280          FALSE,                 /* pc_relative */
 281          0,                     /* bitpos */
 282          complain_overflow_bitfield, /* complain_on_overflow */
 283          coff_i386_reloc,       /* special_function */
 284          "16",                  /* name */
 285          TRUE,                  /* partial_inplace */
 286          0x0000ffff,            /* src_mask */
 287          0x0000ffff,            /* dst_mask */
 288          PCRELOFFSET),          /* pcrel_offset */
 289   /* 32-bit longword relocation (021).  */
 290   HOWTO (R_RELLONG,             /* type */
 291          0,                     /* rightshift */
 292          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 293          32,                    /* bitsize */
 294          FALSE,                 /* pc_relative */
 295          0,                     /* bitpos */
 296          complain_overflow_bitfield, /* complain_on_overflow */
 297          coff_i386_reloc,       /* special_function */
 298          "32",                  /* name */
 299          TRUE,                  /* partial_inplace */
 300          0xffffffff,            /* src_mask */
 301          0xffffffff,            /* dst_mask */
 302          PCRELOFFSET),          /* pcrel_offset */
 303   /* Byte PC relative relocation (022).  */
 304   HOWTO (R_PCRBYTE,             /* type */
 305          0,                     /* rightshift */
 306          0,                     /* size (0 = byte, 1 = short, 2 = long) */
 307          8,                     /* bitsize */
 308          TRUE,                  /* pc_relative */
 309          0,                     /* bitpos */
 310          complain_overflow_signed, /* complain_on_overflow */
 311          coff_i386_reloc,       /* special_function */
 312          "DISP8",               /* name */
 313          TRUE,                  /* partial_inplace */
 314          0x000000ff,            /* src_mask */
 315          0x000000ff,            /* dst_mask */
 316          PCRELOFFSET),          /* pcrel_offset */
 317   /* 16-bit word PC relative relocation (023).  */
 318   HOWTO (R_PCRWORD,             /* type */
 319          0,                     /* rightshift */
 320          1,                     /* size (0 = byte, 1 = short, 2 = long) */
 321          16,                    /* bitsize */
 322          TRUE,                  /* pc_relative */
 323          0,                     /* bitpos */
 324          complain_overflow_signed, /* complain_on_overflow */
 325          coff_i386_reloc,       /* special_function */
 326          "DISP16",              /* name */
 327          TRUE,                  /* partial_inplace */
 328          0x0000ffff,            /* src_mask */
 329          0x0000ffff,            /* dst_mask */
 330          PCRELOFFSET),          /* pcrel_offset */
 331   /* 32-bit longword PC relative relocation (024).  */
 332   HOWTO (R_PCRLONG,             /* type */
 333          0,                     /* rightshift */
 334          2,                     /* size (0 = byte, 1 = short, 2 = long) */
 335          32,                    /* bitsize */
 336          TRUE,                  /* pc_relative */
 337          0,                     /* bitpos */
 338          complain_overflow_signed, /* complain_on_overflow */
 339          coff_i386_reloc,       /* special_function */
 340          "DISP32",              /* name */
 341          TRUE,                  /* partial_inplace */
 342          0xffffffff,            /* src_mask */
 343          0xffffffff,            /* dst_mask */
 344          PCRELOFFSET)           /* pcrel_offset */
 345 };
 346
 347 /* Turn a howto into a reloc  nunmber */
 348
 349 #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
 350 #define BADMAG(x) I386BADMAG(x)
 351 #define I386 1                  /* Customize coffcode.h */
 352
 353 #define RTYPE2HOWTO(cache_ptr, dst)                                     \
 354   ((cache_ptr)->howto =                                                 \
 355    ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0])      \
 356     ? howto_table + (dst)->r_type                                       \
 357     : NULL))
 358
 359 /* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
 360    library.  On some other COFF targets STYP_BSS is normally
 361    STYP_NOLOAD.  */
 362 #define BSS_NOLOAD_IS_SHARED_LIBRARY
 363
 364 /* Compute the addend of a reloc.  If the reloc is to a common symbol,
 365    the object file contains the value of the common symbol.  By the
 366    time this is called, the linker may be using a different symbol
 367    from a different object file with a different value.  Therefore, we
 368    hack wildly to locate the original symbol from this file so that we
 369    can make the correct adjustment.  This macro sets coffsym to the
 370    symbol from the original file, and uses it to set the addend value
 371    correctly.  If this is not a common symbol, the usual addend
 372    calculation is done, except that an additional tweak is needed for
 373    PC relative relocs.
 374    FIXME: This macro refers to symbols and asect; these are from the
 375    calling function, not the macro arguments.  */
 376
 377 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)                \
 378   {                                                             \
 379     coff_symbol_type *coffsym = (coff_symbol_type *) NULL;      \
 380     if (ptr && bfd_asymbol_bfd (ptr) != abfd)                   \
 381       coffsym = (obj_symbols (abfd)                             \
 382                  + (cache_ptr->sym_ptr_ptr - symbols));         \
 383     else if (ptr)                                               \
 384       coffsym = coff_symbol_from (abfd, ptr);                   \
 385     if (coffsym != (coff_symbol_type *) NULL                    \
 386         && coffsym->native->u.syment.n_scnum == 0)              \
 387       cache_ptr->addend = - coffsym->native->u.syment.n_value;  \
 388     else if (ptr && bfd_asymbol_bfd (ptr) == abfd               \
 389              && ptr->section != (asection *) NULL)              \
 390       cache_ptr->addend = - (ptr->section->vma + ptr->value);   \
 391     else                                                        \
 392       cache_ptr->addend = 0;                                    \
 393     if (ptr && howto_table[reloc.r_type].pc_relative)           \
 394       cache_ptr->addend += asect->vma;                          \
 395   }
 396
 397 /* We use the special COFF backend linker.  For normal i386 COFF, we
 398    can use the generic relocate_section routine.  For PE, we need our
 399    own routine.  */
 400
 401 #ifndef COFF_WITH_PE
 402
 403 #define coff_relocate_section _bfd_coff_generic_relocate_section
 404
 405 #else /* COFF_WITH_PE */
 406
 407 /* The PE relocate section routine.  The only difference between this
 408    and the regular routine is that we don't want to do anything for a
 409    relocatable link.  */
 410
 411 static bfd_boolean coff_pe_i386_relocate_section
 412   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 413            struct internal_reloc *, struct internal_syment *, asection **));
 414
 415 static bfd_boolean
 416 coff_pe_i386_relocate_section (output_bfd, info, input_bfd,
 417                                input_section, contents, relocs, syms,
 418                                sections)
 419      bfd *output_bfd;
 420      struct bfd_link_info *info;
 421      bfd *input_bfd;
 422      asection *input_section;
 423      bfd_byte *contents;
 424      struct internal_reloc *relocs;
 425      struct internal_syment *syms;
 426      asection **sections;
 427 {
 428   if (info->relocatable)
 429     return TRUE;
 430
 431   return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,
 432                                              input_section, contents,
 433                                              relocs, syms, sections);
 434 }
 435
 436 #define coff_relocate_section coff_pe_i386_relocate_section
 437
 438 #endif /* COFF_WITH_PE */
 439
 440 /* Convert an rtype to howto for the COFF backend linker.  */
 441
 442 static reloc_howto_type *
 443 coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
 444      bfd *abfd ATTRIBUTE_UNUSED;
 445      asection *sec;
 446      struct internal_reloc *rel;
 447      struct coff_link_hash_entry *h;
 448      struct internal_syment *sym;
 449      bfd_vma *addendp;
 450 {
 451   reloc_howto_type *howto;
 452
 453   if (rel->r_type >= sizeof (howto_table) / sizeof (howto_table[0]))
 454     {
 455       bfd_set_error (bfd_error_bad_value);
 456       return NULL;
 457     }
 458
 459   howto = howto_table + rel->r_type;
 460
 461 #ifdef COFF_WITH_PE
 462   /* Cancel out code in _bfd_coff_generic_relocate_section.  */
 463   *addendp = 0;
 464 #endif
 465
 466   if (howto->pc_relative)
 467     *addendp += sec->vma;
 468
 469   if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
 470     {
 471       /* This is a common symbol.  The section contents include the
 472          size (sym->n_value) as an addend.  The relocate_section
 473          function will be adding in the final value of the symbol.  We
 474          need to subtract out the current size in order to get the
 475          correct result.  */
 476
 477       BFD_ASSERT (h != NULL);
 478
 479 #ifndef COFF_WITH_PE
 480       /* I think we *do* want to bypass this.  If we don't, I have
 481          seen some data parameters get the wrong relocation address.
 482          If I link two versions with and without this section bypassed
 483          and then do a binary comparison, the addresses which are
 484          different can be looked up in the map.  The case in which
 485          this section has been bypassed has addresses which correspond
 486          to values I can find in the map.  */
 487       *addendp -= sym->n_value;
 488 #endif
 489     }
 490
 491 #ifndef COFF_WITH_PE
 492   /* If the output symbol is common (in which case this must be a
 493      relocatable link), we need to add in the final size of the
 494      common symbol.  */
 495   if (h != NULL && h->root.type == bfd_link_hash_common)
 496     *addendp += h->root.u.c.size;
 497 #endif
 498
 499 #ifdef COFF_WITH_PE
 500   if (howto->pc_relative)
 501     {
 502       *addendp -= 4;
 503
 504       /* If the symbol is defined, then the generic code is going to
 505          add back the symbol value in order to cancel out an
 506          adjustment it made to the addend.  However, we set the addend
 507          to 0 at the start of this function.  We need to adjust here,
 508          to avoid the adjustment the generic code will make.  FIXME:
 509          This is getting a bit hackish.  */
 510       if (sym != NULL && sym->n_scnum != 0)
 511         *addendp -= sym->n_value;
 512     }
 513
 514   if (rel->r_type == R_IMAGEBASE
 515       && (bfd_get_flavour(sec->output_section->owner)
 516           == bfd_target_coff_flavour))
 517     {
 518       *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
 519     }
 520
 521   BFD_ASSERT (sym != NULL);
 522   if (rel->r_type == R_SECREL32 && sym != NULL)
 523     {
 524       bfd_vma osect_vma;
 525
 526       if (h && (h->type == bfd_link_hash_defined
 527                 || h->type == bfd_link_hash_defweak))
 528         osect_vma = h->root.u.def.section->output_section->vma;
 529       else
 530         {
 531           asection *sec;
 532           int i;
 533
 534           /* Sigh, the only way to get the section to offset against
 535              is to find it the hard way.  */
 536
 537           for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++)
 538             sec = sec->next;
 539
 540           osect_vma = sec->output_section->vma;
 541         }
 542
 543       *addendp -= osect_vma;
 544     }
 545 #endif
 546
 547   return howto;
 548 }
 549
 550 #define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup
 551 #define coff_bfd_reloc_name_lookup coff_i386_reloc_name_lookup
 552
 553 static reloc_howto_type *
 554 coff_i386_reloc_type_lookup (abfd, code)
 555      bfd *abfd ATTRIBUTE_UNUSED;
 556      bfd_reloc_code_real_type code;
 557 {
 558   switch (code)
 559     {
 560     case BFD_RELOC_RVA:
 561       return howto_table + R_IMAGEBASE;
 562     case BFD_RELOC_32:
 563       return howto_table + R_DIR32;
 564     case BFD_RELOC_32_PCREL:
 565       return howto_table + R_PCRLONG;
 566     case BFD_RELOC_16:
 567       return howto_table + R_RELWORD;
 568     case BFD_RELOC_16_PCREL:
 569       return howto_table + R_PCRWORD;
 570     case BFD_RELOC_8:
 571       return howto_table + R_RELBYTE;
 572     case BFD_RELOC_8_PCREL:
 573       return howto_table + R_PCRBYTE;
 574 #ifdef COFF_WITH_PE
 575     case BFD_RELOC_32_SECREL:
 576       return howto_table + R_SECREL32;
 577 #endif
 578     default:
 579       BFD_FAIL ();
 580       return 0;
 581     }
 582 }
 583
 584 static reloc_howto_type *
 585 coff_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 586                              const char *r_name)
 587 {
 588   unsigned int i;
 589
 590   for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
 591     if (howto_table[i].name != NULL
 592         && strcasecmp (howto_table[i].name, r_name) == 0)
 593       return &howto_table[i];
 594
 595   return NULL;
 596 }
 597
 598 #define coff_rtype_to_howto coff_i386_rtype_to_howto
 599
 600 #ifdef TARGET_UNDERSCORE
 601
 602 /* If i386 gcc uses underscores for symbol names, then it does not use
 603    a leading dot for local labels, so if TARGET_UNDERSCORE is defined
 604    we treat all symbols starting with L as local.  */
 605
 606 static bfd_boolean coff_i386_is_local_label_name
 607   PARAMS ((bfd *, const char *));
 608
 609 static bfd_boolean
 610 coff_i386_is_local_label_name (abfd, name)
 611      bfd *abfd;
 612      const char *name;
 613 {
 614   if (name[0] == 'L')
 615     return TRUE;
 616
 617   return _bfd_coff_is_local_label_name (abfd, name);
 618 }
 619
 620 #define coff_bfd_is_local_label_name coff_i386_is_local_label_name
 621
 622 #endif /* TARGET_UNDERSCORE */
 623
 624 #include "coffcode.h"
 625
 626 const bfd_target
 627 #ifdef TARGET_SYM
 628   TARGET_SYM =
 629 #else
 630   i386coff_vec =
 631 #endif
 632 {
 633 #ifdef TARGET_NAME
 634   TARGET_NAME,
 635 #else
 636   "coff-i386",                  /* name */
 637 #endif
 638   bfd_target_coff_flavour,
 639   BFD_ENDIAN_LITTLE,            /* data byte order is little */
 640   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 641
 642   (HAS_RELOC | EXEC_P |         /* object flags */
 643    HAS_LINENO | HAS_DEBUG |
 644    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 645
 646   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 647 #ifdef COFF_WITH_PE
 648    | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY
 649 #endif
 650    | SEC_CODE | SEC_DATA),
 651
 652 #ifdef TARGET_UNDERSCORE
 653   TARGET_UNDERSCORE,            /* leading underscore */
 654 #else
 655   0,                            /* leading underscore */
 656 #endif
 657   '/',                          /* ar_pad_char */
 658   15,                           /* ar_max_namelen */
 659
 660   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 661      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 662      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 663   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 664      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 665      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 666
 667 /* Note that we allow an object file to be treated as a core file as well.  */
 668     {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
 669        bfd_generic_archive_p, coff_object_p},
 670     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 671        bfd_false},
 672     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 673        _bfd_write_archive_contents, bfd_false},
 674
 675      BFD_JUMP_TABLE_GENERIC (coff),
 676      BFD_JUMP_TABLE_COPY (coff),
 677      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 678      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 679      BFD_JUMP_TABLE_SYMBOLS (coff),
 680      BFD_JUMP_TABLE_RELOCS (coff),
 681      BFD_JUMP_TABLE_WRITE (coff),
 682      BFD_JUMP_TABLE_LINK (coff),
 683      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 684
 685   NULL,
 686
 687   COFF_SWAP_TABLE
 688 };