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/* BFD back-end for Intel 386 COFF files.
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   2000, 2001, 2002
   Free Software Foundation, Inc.
   Written by Cygnus Support.
 
This file is part of BFD, the Binary File Descriptor library.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
 
#include "coff/i386.h"
 
#include "coff/internal.h"
 
#ifdef COFF_WITH_PE
#include "coff/pe.h"
#endif
 
#ifdef COFF_GO32_EXE
#include "coff/go32exe.h"
#endif
 
#include "libcoff.h"
 
static bfd_reloc_status_type coff_i386_reloc
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static reloc_howto_type *coff_i386_rtype_to_howto
  PARAMS ((bfd *, asection *, struct internal_reloc *,
           struct coff_link_hash_entry *, struct internal_syment *,
           bfd_vma *));
static reloc_howto_type *coff_i386_reloc_type_lookup
  PARAMS ((bfd *, bfd_reloc_code_real_type));
 
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
/* The page size is a guess based on ELF.  */
 
#define COFF_PAGE_SIZE 0x1000
 
/* For some reason when using i386 COFF the value stored in the .text
   section for a reference to a common symbol is the value itself plus
   any desired offset.  Ian Taylor, Cygnus Support.  */
 
/* If we are producing relocateable output, we need to do some
   adjustments to the object file that are not done by the
   bfd_perform_relocation function.  This function is called by every
   reloc type to make any required adjustments.  */
 
static bfd_reloc_status_type
coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
                 error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section ATTRIBUTE_UNUSED;
     bfd *output_bfd;
     char **error_message ATTRIBUTE_UNUSED;
{
  symvalue diff;
 
#ifndef COFF_WITH_PE
  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;
#endif
 
  if (bfd_is_com_section (symbol->section))
    {
#ifndef COFF_WITH_PE
      /* We are relocating a common symbol.  The current value in the
         object file is ORIG + OFFSET, where ORIG is the value of the
         common symbol as seen by the object file when it was compiled
         (this may be zero if the symbol was undefined) and OFFSET is
         the offset into the common symbol (normally zero, but may be
         non-zero when referring to a field in a common structure).
         ORIG is the negative of reloc_entry->addend, which is set by
         the CALC_ADDEND macro below.  We want to replace the value in
         the object file with NEW + OFFSET, where NEW is the value of
         the common symbol which we are going to put in the final
         object file.  NEW is symbol->value.  */
      diff = symbol->value + reloc_entry->addend;
#else
      /* In PE mode, we do not offset the common symbol.  */
      diff = reloc_entry->addend;
#endif
    }
  else
    {
      /* For some reason bfd_perform_relocation always effectively
         ignores the addend for a COFF target when producing
         relocateable output.  This seems to be always wrong for 386
         COFF, so we handle the addend here instead.  */
#ifdef COFF_WITH_PE
      if (output_bfd == (bfd *) NULL)
        {
          reloc_howto_type *howto = reloc_entry->howto;
 
          /* Although PC relative relocations are very similar between
             PE and non-PE formats, but they are off by 1 << howto->size
             bytes. For the external relocation, PE is very different
             from others. See md_apply_fix3 () in gas/config/tc-i386.c.
             When we link PE and non-PE object files together to
             generate a non-PE executable, we have to compensate it
             here.  */
          if (howto->pc_relative && howto->pcrel_offset)
            diff = -(1 << howto->size);
          else
            diff = -reloc_entry->addend;
        }
      else
#endif
        diff = reloc_entry->addend;
    }
 
#ifdef COFF_WITH_PE
  /* FIXME: How should this case be handled?  */
  if (reloc_entry->howto->type == R_IMAGEBASE
      && output_bfd != NULL
      && bfd_get_flavour(output_bfd) == bfd_target_coff_flavour)
    diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
#endif
 
#define DOIT(x) \
  x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
 
    if (diff != 0)
      {
        reloc_howto_type *howto = reloc_entry->howto;
        unsigned char *addr = (unsigned char *) data + reloc_entry->address;
 
        switch (howto->size)
          {
          case 0:
            {
              char x = bfd_get_8 (abfd, addr);
              DOIT (x);
              bfd_put_8 (abfd, x, addr);
            }
            break;
 
          case 1:
            {
              short x = bfd_get_16 (abfd, addr);
              DOIT (x);
              bfd_put_16 (abfd, (bfd_vma) x, addr);
            }
            break;
 
          case 2:
            {
              long x = bfd_get_32 (abfd, addr);
              DOIT (x);
              bfd_put_32 (abfd, (bfd_vma) x, addr);
            }
            break;
 
          default:
            abort ();
          }
      }
 
  /* Now let bfd_perform_relocation finish everything up.  */
  return bfd_reloc_continue;
}
 
#ifdef COFF_WITH_PE
/* Return true if this relocation should appear in the output .reloc
   section.  */
 
static boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
 
static boolean in_reloc_p (abfd, howto)
     bfd * abfd ATTRIBUTE_UNUSED;
     reloc_howto_type *howto;
{
  return ! howto->pc_relative && howto->type != R_IMAGEBASE;
}
#endif /* COFF_WITH_PE */
 
#ifndef PCRELOFFSET
#define PCRELOFFSET false
#endif
 
static reloc_howto_type howto_table[] =
{
  EMPTY_HOWTO (0),
  EMPTY_HOWTO (1),
  EMPTY_HOWTO (2),
  EMPTY_HOWTO (3),
  EMPTY_HOWTO (4),
  EMPTY_HOWTO (5),
  HOWTO (R_DIR32,               /* type */
         0,                      /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         32,                    /* bitsize */
         false,                 /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_bitfield, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "dir32",               /* name */
         true,                  /* partial_inplace */
         0xffffffff,            /* src_mask */
         0xffffffff,            /* dst_mask */
         true),                 /* pcrel_offset */
  /* PE IMAGE_REL_I386_DIR32NB relocation (7).  */
  HOWTO (R_IMAGEBASE,           /* type */
         0,                      /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         32,                    /* bitsize */
         false,                 /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_bitfield, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "rva32",               /* name */
         true,                  /* partial_inplace */
         0xffffffff,            /* src_mask */
         0xffffffff,            /* dst_mask */
         false),                /* pcrel_offset */
  EMPTY_HOWTO (010),
  EMPTY_HOWTO (011),
  EMPTY_HOWTO (012),
  EMPTY_HOWTO (013),
  EMPTY_HOWTO (014),
  EMPTY_HOWTO (015),
  EMPTY_HOWTO (016),
  /* Byte relocation (017).  */
  HOWTO (R_RELBYTE,             /* type */
         0,                      /* rightshift */
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
         8,                     /* bitsize */
         false,                 /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_bitfield, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "8",                   /* name */
         true,                  /* partial_inplace */
         0x000000ff,            /* src_mask */
         0x000000ff,            /* dst_mask */
         PCRELOFFSET),          /* pcrel_offset */
  /* 16-bit word relocation (020).  */
  HOWTO (R_RELWORD,             /* type */
         0,                      /* rightshift */
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
         16,                    /* bitsize */
         false,                 /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_bitfield, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "16",                  /* name */
         true,                  /* partial_inplace */
         0x0000ffff,            /* src_mask */
         0x0000ffff,            /* dst_mask */
         PCRELOFFSET),          /* pcrel_offset */
  /* 32-bit longword relocation (021).  */
  HOWTO (R_RELLONG,             /* type */
         0,                      /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         32,                    /* bitsize */
         false,                 /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_bitfield, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "32",                  /* name */
         true,                  /* partial_inplace */
         0xffffffff,            /* src_mask */
         0xffffffff,            /* dst_mask */
         PCRELOFFSET),          /* pcrel_offset */
  /* Byte PC relative relocation (022).  */
  HOWTO (R_PCRBYTE,             /* type */
         0,                      /* rightshift */
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
         8,                     /* bitsize */
         true,                  /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_signed, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "DISP8",               /* name */
         true,                  /* partial_inplace */
         0x000000ff,            /* src_mask */
         0x000000ff,            /* dst_mask */
         PCRELOFFSET),          /* pcrel_offset */
  /* 16-bit word PC relative relocation (023).  */
  HOWTO (R_PCRWORD,             /* type */
         0,                      /* rightshift */
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
         16,                    /* bitsize */
         true,                  /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_signed, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "DISP16",              /* name */
         true,                  /* partial_inplace */
         0x0000ffff,            /* src_mask */
         0x0000ffff,            /* dst_mask */
         PCRELOFFSET),          /* pcrel_offset */
  /* 32-bit longword PC relative relocation (024).  */
  HOWTO (R_PCRLONG,             /* type */
         0,                      /* rightshift */
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
         32,                    /* bitsize */
         true,                  /* pc_relative */
         0,                      /* bitpos */
         complain_overflow_signed, /* complain_on_overflow */
         coff_i386_reloc,       /* special_function */
         "DISP32",              /* name */
         true,                  /* partial_inplace */
         0xffffffff,            /* src_mask */
         0xffffffff,            /* dst_mask */
         PCRELOFFSET)           /* pcrel_offset */
};
 
/* Turn a howto into a reloc  nunmber */
 
#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
#define BADMAG(x) I386BADMAG(x)
#define I386 1                  /* Customize coffcode.h */
 
#define RTYPE2HOWTO(cache_ptr, dst)                                     \
  ((cache_ptr)->howto =                                                 \
   ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0])       \
    ? howto_table + (dst)->r_type                                       \
    : NULL))
 
/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
   library.  On some other COFF targets STYP_BSS is normally
   STYP_NOLOAD.  */
#define BSS_NOLOAD_IS_SHARED_LIBRARY
 
/* Compute the addend of a reloc.  If the reloc is to a common symbol,
   the object file contains the value of the common symbol.  By the
   time this is called, the linker may be using a different symbol
   from a different object file with a different value.  Therefore, we
   hack wildly to locate the original symbol from this file so that we
   can make the correct adjustment.  This macro sets coffsym to the
   symbol from the original file, and uses it to set the addend value
   correctly.  If this is not a common symbol, the usual addend
   calculation is done, except that an additional tweak is needed for
   PC relative relocs.
   FIXME: This macro refers to symbols and asect; these are from the
   calling function, not the macro arguments.  */
 
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)                \
  {                                                             \
    coff_symbol_type *coffsym = (coff_symbol_type *) NULL;      \
    if (ptr && bfd_asymbol_bfd (ptr) != abfd)                   \
      coffsym = (obj_symbols (abfd)                             \
                 + (cache_ptr->sym_ptr_ptr - symbols));         \
    else if (ptr)                                               \
      coffsym = coff_symbol_from (abfd, ptr);                   \
    if (coffsym != (coff_symbol_type *) NULL                    \
        && coffsym->native->u.syment.n_scnum == 0)               \
      cache_ptr->addend = - coffsym->native->u.syment.n_value;  \
    else if (ptr && bfd_asymbol_bfd (ptr) == abfd               \
             && ptr->section != (asection *) NULL)              \
      cache_ptr->addend = - (ptr->section->vma + ptr->value);   \
    else                                                        \
      cache_ptr->addend = 0;                                     \
    if (ptr && howto_table[reloc.r_type].pc_relative)           \
      cache_ptr->addend += asect->vma;                          \
  }
 
/* We use the special COFF backend linker.  For normal i386 COFF, we
   can use the generic relocate_section routine.  For PE, we need our
   own routine.  */
 
#ifndef COFF_WITH_PE
 
#define coff_relocate_section _bfd_coff_generic_relocate_section
 
#else /* COFF_WITH_PE */
 
/* The PE relocate section routine.  The only difference between this
   and the regular routine is that we don't want to do anything for a
   relocateable link.  */
 
static boolean coff_pe_i386_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
           struct internal_reloc *, struct internal_syment *, asection **));
 
static boolean
coff_pe_i386_relocate_section (output_bfd, info, input_bfd,
                               input_section, contents, relocs, syms,
                               sections)
     bfd *output_bfd;
     struct bfd_link_info *info;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     struct internal_reloc *relocs;
     struct internal_syment *syms;
     asection **sections;
{
  if (info->relocateable)
    return true;
 
  return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,
                                             input_section, contents,
                                             relocs, syms, sections);
}
 
#define coff_relocate_section coff_pe_i386_relocate_section
 
#endif /* COFF_WITH_PE */
 
/* Convert an rtype to howto for the COFF backend linker.  */
 
static reloc_howto_type *
coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
     bfd *abfd ATTRIBUTE_UNUSED;
     asection *sec;
     struct internal_reloc *rel;
     struct coff_link_hash_entry *h;
     struct internal_syment *sym;
     bfd_vma *addendp;
{
  reloc_howto_type *howto;
 
  if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))
    {
      bfd_set_error (bfd_error_bad_value);
      return NULL;
    }
 
  howto = howto_table + rel->r_type;
 
#ifdef COFF_WITH_PE
  /* Cancel out code in _bfd_coff_generic_relocate_section.  */
  *addendp = 0;
#endif
 
  if (howto->pc_relative)
    *addendp += sec->vma;
 
  if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
    {
      /* This is a common symbol.  The section contents include the
         size (sym->n_value) as an addend.  The relocate_section
         function will be adding in the final value of the symbol.  We
         need to subtract out the current size in order to get the
         correct result.  */
 
      BFD_ASSERT (h != NULL);
 
#ifndef COFF_WITH_PE
      /* I think we *do* want to bypass this.  If we don't, I have
         seen some data parameters get the wrong relocation address.
         If I link two versions with and without this section bypassed
         and then do a binary comparison, the addresses which are
         different can be looked up in the map.  The case in which
         this section has been bypassed has addresses which correspond
         to values I can find in the map.  */
      *addendp -= sym->n_value;
#endif
    }
 
#ifndef COFF_WITH_PE
  /* If the output symbol is common (in which case this must be a
     relocateable link), we need to add in the final size of the
     common symbol.  */
  if (h != NULL && h->root.type == bfd_link_hash_common)
    *addendp += h->root.u.c.size;
#endif
 
#ifdef COFF_WITH_PE
  if (howto->pc_relative)
    {
      *addendp -= 4;
 
      /* If the symbol is defined, then the generic code is going to
         add back the symbol value in order to cancel out an
         adjustment it made to the addend.  However, we set the addend
         to 0 at the start of this function.  We need to adjust here,
         to avoid the adjustment the generic code will make.  FIXME:
         This is getting a bit hackish.  */
      if (sym != NULL && sym->n_scnum != 0)
        *addendp -= sym->n_value;
    }
 
  if (rel->r_type == R_IMAGEBASE
      && (bfd_get_flavour(sec->output_section->owner)
          == bfd_target_coff_flavour))
    {
      *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
    }
#endif
 
  return howto;
}
 
#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup
 
static reloc_howto_type *
coff_i386_reloc_type_lookup (abfd, code)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_reloc_code_real_type code;
{
  switch (code)
    {
    case BFD_RELOC_RVA:
      return howto_table + R_IMAGEBASE;
    case BFD_RELOC_32:
      return howto_table + R_DIR32;
    case BFD_RELOC_32_PCREL:
      return howto_table + R_PCRLONG;
    case BFD_RELOC_16:
      return howto_table + R_RELWORD;
    case BFD_RELOC_16_PCREL:
      return howto_table + R_PCRWORD;
    case BFD_RELOC_8:
      return howto_table + R_RELBYTE;
    case BFD_RELOC_8_PCREL:
      return howto_table + R_PCRBYTE;
    default:
      BFD_FAIL ();
      return 0;
    }
}
 
#define coff_rtype_to_howto coff_i386_rtype_to_howto
 
#ifdef TARGET_UNDERSCORE
 
/* If i386 gcc uses underscores for symbol names, then it does not use
   a leading dot for local labels, so if TARGET_UNDERSCORE is defined
   we treat all symbols starting with L as local.  */
 
static boolean coff_i386_is_local_label_name PARAMS ((bfd *, const char *));
 
static boolean
coff_i386_is_local_label_name (abfd, name)
     bfd *abfd;
     const char *name;
{
  if (name[0] == 'L')
    return true;
 
  return _bfd_coff_is_local_label_name (abfd, name);
}
 
#define coff_bfd_is_local_label_name coff_i386_is_local_label_name
 
#endif /* TARGET_UNDERSCORE */
 
#include "coffcode.h"
 
const bfd_target
#ifdef TARGET_SYM
  TARGET_SYM =
#else
  i386coff_vec =
#endif
{
#ifdef TARGET_NAME
  TARGET_NAME,
#else
  "coff-i386",                  /* name */
#endif
  bfd_target_coff_flavour,
  BFD_ENDIAN_LITTLE,            /* data byte order is little */
  BFD_ENDIAN_LITTLE,            /* header byte order is little */
 
  (HAS_RELOC | EXEC_P |         /* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
#ifdef COFF_WITH_PE
   | SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY
#endif
   | SEC_CODE | SEC_DATA),
 
#ifdef TARGET_UNDERSCORE
  TARGET_UNDERSCORE,            /* leading underscore */
#else
  0,                             /* leading underscore */
#endif
  '/',                          /* ar_pad_char */
  15,                           /* ar_max_namelen */
 
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 
/* Note that we allow an object file to be treated as a core file as well.  */
    {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
       bfd_generic_archive_p, coff_object_p},
    {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
       bfd_false},
    {bfd_false, coff_write_object_contents, /* bfd_write_contents */
       _bfd_write_archive_contents, bfd_false},
 
     BFD_JUMP_TABLE_GENERIC (coff),
     BFD_JUMP_TABLE_COPY (coff),
     BFD_JUMP_TABLE_CORE (_bfd_nocore),
     BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
     BFD_JUMP_TABLE_SYMBOLS (coff),
     BFD_JUMP_TABLE_RELOCS (coff),
     BFD_JUMP_TABLE_WRITE (coff),
     BFD_JUMP_TABLE_LINK (coff),
     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 
  NULL,
 
  COFF_SWAP_TABLE
};

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[/] [or1k/] [trunk/] [gdb-5.3/] [bfd/] [coff-i386.c] - Blame information for rev 1181

Line No.	Rev	Author	Line
1	1181	sfurman	`/* BFD back-end for Intel 386 COFF files.`
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			`#include "bfd.h"`
24			`#include "sysdep.h"`
25			`#include "libbfd.h"`
26
27			`#include "coff/i386.h"`
28
29			`#include "coff/internal.h"`
30
31			`#ifdef COFF_WITH_PE`
32			`#include "coff/pe.h"`
33			`#endif`
34
35			`#ifdef COFF_GO32_EXE`
36			`#include "coff/go32exe.h"`
37			`#endif`
38
39			`#include "libcoff.h"`
40
41			`static bfd_reloc_status_type coff_i386_reloc`
42			`PARAMS ((bfd , arelent , asymbol , PTR, asection , bfd , char *));`
43			`static reloc_howto_type *coff_i386_rtype_to_howto`
44			`PARAMS ((bfd , asection , struct internal_reloc *,`
45			`struct coff_link_hash_entry , struct internal_syment ,`
46			`bfd_vma *));`
47			`static reloc_howto_type *coff_i386_reloc_type_lookup`
48			`PARAMS ((bfd *, bfd_reloc_code_real_type));`
49
50			`#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)`
51			`/* The page size is a guess based on ELF. */`
52
53			`#define COFF_PAGE_SIZE 0x1000`
54
55			`/* For some reason when using i386 COFF the value stored in the .text`
56			`section for a reference to a common symbol is the value itself plus`
57			`any desired offset. Ian Taylor, Cygnus Support. */`
58
59			`/* If we are producing relocateable output, we need to do some`
60			`adjustments to the object file that are not done by the`
61			`bfd_perform_relocation function. This function is called by every`
62			`reloc type to make any required adjustments. */`
63
64			`static bfd_reloc_status_type`
65			`coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,`
66			`error_message)`
67			`bfd *abfd;`
68			`arelent *reloc_entry;`
69			`asymbol *symbol;`
70			`PTR data;`
71			`asection *input_section ATTRIBUTE_UNUSED;`
72			`bfd *output_bfd;`
73			`char **error_message ATTRIBUTE_UNUSED;`
74			`{`
75			`symvalue diff;`
76
77			`#ifndef COFF_WITH_PE`
78			`if (output_bfd == (bfd *) NULL)`
79			`return bfd_reloc_continue;`
80			`#endif`
81
82			`if (bfd_is_com_section (symbol->section))`
83			`{`
84			`#ifndef COFF_WITH_PE`
85			`/* We are relocating a common symbol. The current value in the`
86			`object file is ORIG + OFFSET, where ORIG is the value of the`
87			`common symbol as seen by the object file when it was compiled`
88			`(this may be zero if the symbol was undefined) and OFFSET is`
89			`the offset into the common symbol (normally zero, but may be`
90			`non-zero when referring to a field in a common structure).`
91			`ORIG is the negative of reloc_entry->addend, which is set by`
92			`the CALC_ADDEND macro below. We want to replace the value in`
93			`the object file with NEW + OFFSET, where NEW is the value of`
94			`the common symbol which we are going to put in the final`
95			`object file. NEW is symbol->value. */`
96			`diff = symbol->value + reloc_entry->addend;`
97			`#else`
98			`/* In PE mode, we do not offset the common symbol. */`
99			`diff = reloc_entry->addend;`
100			`#endif`
101			`}`
102			`else`
103			`{`
104			`/* For some reason bfd_perform_relocation always effectively`
105			`ignores the addend for a COFF target when producing`
106			`relocateable output. This seems to be always wrong for 386`
107			`COFF, so we handle the addend here instead. */`
108			`#ifdef COFF_WITH_PE`
109			`if (output_bfd == (bfd *) NULL)`
110			`{`
111			`reloc_howto_type *howto = reloc_entry->howto;`
112
113			`/* Although PC relative relocations are very similar between`
114			`PE and non-PE formats, but they are off by 1 << howto->size`
115			`bytes. For the external relocation, PE is very different`
116			`from others. See md_apply_fix3 () in gas/config/tc-i386.c.`
117			`When we link PE and non-PE object files together to`
118			`generate a non-PE executable, we have to compensate it`
119			`here. */`
120			`if (howto->pc_relative && howto->pcrel_offset)`
121			`diff = -(1 << howto->size);`
122			`else`
123			`diff = -reloc_entry->addend;`
124			`}`
125			`else`
126			`#endif`
127			`diff = reloc_entry->addend;`
128			`}`
129
130			`#ifdef COFF_WITH_PE`
131			`/* FIXME: How should this case be handled? */`
132			`if (reloc_entry->howto->type == R_IMAGEBASE`
133			`&& output_bfd != NULL`
134			`&& bfd_get_flavour(output_bfd) == bfd_target_coff_flavour)`
135			`diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;`
136			`#endif`
137
138			`#define DOIT(x) \`
139			`x = ((x & ~howto->dst_mask) \| (((x & howto->src_mask) + diff) & howto->dst_mask))`
140
141			`if (diff != 0)`
142			`{`
143			`reloc_howto_type *howto = reloc_entry->howto;`
144			`unsigned char addr = (unsigned char ) data + reloc_entry->address;`
145
146			`switch (howto->size)`
147			`{`
148			`case 0:`
149			`{`
150			`char x = bfd_get_8 (abfd, addr);`
151			`DOIT (x);`
152			`bfd_put_8 (abfd, x, addr);`
153			`}`
154			`break;`
155
156			`case 1:`
157			`{`
158			`short x = bfd_get_16 (abfd, addr);`
159			`DOIT (x);`
160			`bfd_put_16 (abfd, (bfd_vma) x, addr);`
161			`}`
162			`break;`
163
164			`case 2:`
165			`{`
166			`long x = bfd_get_32 (abfd, addr);`
167			`DOIT (x);`
168			`bfd_put_32 (abfd, (bfd_vma) x, addr);`
169			`}`
170			`break;`
171
172			`default:`
173			`abort ();`
174			`}`
175			`}`
176
177			`/* Now let bfd_perform_relocation finish everything up. */`
178			`return bfd_reloc_continue;`
179			`}`
180
181			`#ifdef COFF_WITH_PE`
182			`/* Return true if this relocation should appear in the output .reloc`
183			`section. */`
184
185			`static boolean in_reloc_p PARAMS ((bfd , reloc_howto_type ));`
186
187			`static boolean in_reloc_p (abfd, howto)`
188			`bfd * abfd ATTRIBUTE_UNUSED;`
189			`reloc_howto_type *howto;`
190			`{`
191			`return ! howto->pc_relative && howto->type != R_IMAGEBASE;`
192			`}`
193			`#endif /* COFF_WITH_PE */`
194
195			`#ifndef PCRELOFFSET`
196			`#define PCRELOFFSET false`
197			`#endif`
198
199			`static reloc_howto_type howto_table[] =`
200			`{`
201			`EMPTY_HOWTO (0),`
202			`EMPTY_HOWTO (1),`
203			`EMPTY_HOWTO (2),`
204			`EMPTY_HOWTO (3),`
205			`EMPTY_HOWTO (4),`
206			`EMPTY_HOWTO (5),`
207			`HOWTO (R_DIR32, /* type */`
208			`0, /* rightshift */`
209			`2, /* size (0 = byte, 1 = short, 2 = long) */`
210			`32, /* bitsize */`
211			`false, /* pc_relative */`
212			`0, /* bitpos */`
213			`complain_overflow_bitfield, /* complain_on_overflow */`
214			`coff_i386_reloc, /* special_function */`
215			`"dir32", /* name */`
216			`true, /* partial_inplace */`
217			`0xffffffff, /* src_mask */`
218			`0xffffffff, /* dst_mask */`
219			`true), /* pcrel_offset */`
220			`/* PE IMAGE_REL_I386_DIR32NB relocation (7). */`
221			`HOWTO (R_IMAGEBASE, /* type */`
222			`0, /* rightshift */`
223			`2, /* size (0 = byte, 1 = short, 2 = long) */`
224			`32, /* bitsize */`
225			`false, /* pc_relative */`
226			`0, /* bitpos */`
227			`complain_overflow_bitfield, /* complain_on_overflow */`
228			`coff_i386_reloc, /* special_function */`
229			`"rva32", /* name */`
230			`true, /* partial_inplace */`
231			`0xffffffff, /* src_mask */`
232			`0xffffffff, /* dst_mask */`
233			`false), /* pcrel_offset */`
234			`EMPTY_HOWTO (010),`
235			`EMPTY_HOWTO (011),`
236			`EMPTY_HOWTO (012),`
237			`EMPTY_HOWTO (013),`
238			`EMPTY_HOWTO (014),`
239			`EMPTY_HOWTO (015),`
240			`EMPTY_HOWTO (016),`
241			`/* Byte relocation (017). */`
242			`HOWTO (R_RELBYTE, /* type */`
243			`0, /* rightshift */`
244			`0, /* size (0 = byte, 1 = short, 2 = long) */`
245			`8, /* bitsize */`
246			`false, /* pc_relative */`
247			`0, /* bitpos */`
248			`complain_overflow_bitfield, /* complain_on_overflow */`
249			`coff_i386_reloc, /* special_function */`
250			`"8", /* name */`
251			`true, /* partial_inplace */`
252			`0x000000ff, /* src_mask */`
253			`0x000000ff, /* dst_mask */`
254			`PCRELOFFSET), /* pcrel_offset */`
255			`/* 16-bit word relocation (020). */`
256			`HOWTO (R_RELWORD, /* type */`
257			`0, /* rightshift */`
258			`1, /* size (0 = byte, 1 = short, 2 = long) */`
259			`16, /* bitsize */`
260			`false, /* pc_relative */`
261			`0, /* bitpos */`
262			`complain_overflow_bitfield, /* complain_on_overflow */`
263			`coff_i386_reloc, /* special_function */`
264			`"16", /* name */`
265			`true, /* partial_inplace */`
266			`0x0000ffff, /* src_mask */`
267			`0x0000ffff, /* dst_mask */`
268			`PCRELOFFSET), /* pcrel_offset */`
269			`/* 32-bit longword relocation (021). */`
270			`HOWTO (R_RELLONG, /* type */`
271			`0, /* rightshift */`
272			`2, /* size (0 = byte, 1 = short, 2 = long) */`
273			`32, /* bitsize */`
274			`false, /* pc_relative */`
275			`0, /* bitpos */`
276			`complain_overflow_bitfield, /* complain_on_overflow */`
277			`coff_i386_reloc, /* special_function */`
278			`"32", /* name */`
279			`true, /* partial_inplace */`
280			`0xffffffff, /* src_mask */`
281			`0xffffffff, /* dst_mask */`
282			`PCRELOFFSET), /* pcrel_offset */`
283			`/* Byte PC relative relocation (022). */`
284			`HOWTO (R_PCRBYTE, /* type */`
285			`0, /* rightshift */`
286			`0, /* size (0 = byte, 1 = short, 2 = long) */`
287			`8, /* bitsize */`
288			`true, /* pc_relative */`
289			`0, /* bitpos */`
290			`complain_overflow_signed, /* complain_on_overflow */`
291			`coff_i386_reloc, /* special_function */`
292			`"DISP8", /* name */`
293			`true, /* partial_inplace */`
294			`0x000000ff, /* src_mask */`
295			`0x000000ff, /* dst_mask */`
296			`PCRELOFFSET), /* pcrel_offset */`
297			`/* 16-bit word PC relative relocation (023). */`
298			`HOWTO (R_PCRWORD, /* type */`
299			`0, /* rightshift */`
300			`1, /* size (0 = byte, 1 = short, 2 = long) */`
301			`16, /* bitsize */`
302			`true, /* pc_relative */`
303			`0, /* bitpos */`
304			`complain_overflow_signed, /* complain_on_overflow */`
305			`coff_i386_reloc, /* special_function */`
306			`"DISP16", /* name */`
307			`true, /* partial_inplace */`
308			`0x0000ffff, /* src_mask */`
309			`0x0000ffff, /* dst_mask */`
310			`PCRELOFFSET), /* pcrel_offset */`
311			`/* 32-bit longword PC relative relocation (024). */`
312			`HOWTO (R_PCRLONG, /* type */`
313			`0, /* rightshift */`
314			`2, /* size (0 = byte, 1 = short, 2 = long) */`
315			`32, /* bitsize */`
316			`true, /* pc_relative */`
317			`0, /* bitpos */`
318			`complain_overflow_signed, /* complain_on_overflow */`
319			`coff_i386_reloc, /* special_function */`
320			`"DISP32", /* name */`
321			`true, /* partial_inplace */`
322			`0xffffffff, /* src_mask */`
323			`0xffffffff, /* dst_mask */`
324			`PCRELOFFSET) /* pcrel_offset */`
325			`};`
326
327			`/* Turn a howto into a reloc nunmber */`
328
329			`#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }`
330			`#define BADMAG(x) I386BADMAG(x)`
331			`#define I386 1 /* Customize coffcode.h */`
332
333			`#define RTYPE2HOWTO(cache_ptr, dst) \`
334			`((cache_ptr)->howto = \`
335			`((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \`
336			`? howto_table + (dst)->r_type \`
337			`: NULL))`
338
339			`/* For 386 COFF a STYP_NOLOAD \| STYP_BSS section is part of a shared`
340			`library. On some other COFF targets STYP_BSS is normally`
341			`STYP_NOLOAD. */`
342			`#define BSS_NOLOAD_IS_SHARED_LIBRARY`
343
344			`/* Compute the addend of a reloc. If the reloc is to a common symbol,`
345			`the object file contains the value of the common symbol. By the`
346			`time this is called, the linker may be using a different symbol`
347			`from a different object file with a different value. Therefore, we`
348			`hack wildly to locate the original symbol from this file so that we`
349			`can make the correct adjustment. This macro sets coffsym to the`
350			`symbol from the original file, and uses it to set the addend value`
351			`correctly. If this is not a common symbol, the usual addend`
352			`calculation is done, except that an additional tweak is needed for`
353			`PC relative relocs.`
354			`FIXME: This macro refers to symbols and asect; these are from the`
355			`calling function, not the macro arguments. */`
356
357			`#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \`
358			`{ \`
359			`coff_symbol_type coffsym = (coff_symbol_type ) NULL; \`
360			`if (ptr && bfd_asymbol_bfd (ptr) != abfd) \`
361			`coffsym = (obj_symbols (abfd) \`
362			`+ (cache_ptr->sym_ptr_ptr - symbols)); \`
363			`else if (ptr) \`
364			`coffsym = coff_symbol_from (abfd, ptr); \`
365			`if (coffsym != (coff_symbol_type *) NULL \`
366			`&& coffsym->native->u.syment.n_scnum == 0) \`
367			`cache_ptr->addend = - coffsym->native->u.syment.n_value; \`
368			`else if (ptr && bfd_asymbol_bfd (ptr) == abfd \`
369			`&& ptr->section != (asection *) NULL) \`
370			`cache_ptr->addend = - (ptr->section->vma + ptr->value); \`
371			`else \`
372			`cache_ptr->addend = 0; \`
373			`if (ptr && howto_table[reloc.r_type].pc_relative) \`
374			`cache_ptr->addend += asect->vma; \`
375			`}`
376
377			`/* We use the special COFF backend linker. For normal i386 COFF, we`
378			`can use the generic relocate_section routine. For PE, we need our`
379			`own routine. */`
380
381			`#ifndef COFF_WITH_PE`
382
383			`#define coff_relocate_section _bfd_coff_generic_relocate_section`
384
385			`#else /* COFF_WITH_PE */`
386
387			`/* The PE relocate section routine. The only difference between this`
388			`and the regular routine is that we don't want to do anything for a`
389			`relocateable link. */`
390
391			`static boolean coff_pe_i386_relocate_section`
392			`PARAMS ((bfd , struct bfd_link_info , bfd , asection , bfd_byte *,`
393			`struct internal_reloc , struct internal_syment , asection **));`
394
395			`static boolean`
396			`coff_pe_i386_relocate_section (output_bfd, info, input_bfd,`
397			`input_section, contents, relocs, syms,`
398			`sections)`
399			`bfd *output_bfd;`
400			`struct bfd_link_info *info;`
401			`bfd *input_bfd;`
402			`asection *input_section;`
403			`bfd_byte *contents;`
404			`struct internal_reloc *relocs;`
405			`struct internal_syment *syms;`
406			`asection **sections;`
407			`{`
408			`if (info->relocateable)`
409			`return true;`
410
411			`return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,`
412			`input_section, contents,`
413			`relocs, syms, sections);`
414			`}`
415
416			`#define coff_relocate_section coff_pe_i386_relocate_section`
417
418			`#endif /* COFF_WITH_PE */`
419
420			`/* Convert an rtype to howto for the COFF backend linker. */`
421
422			`static reloc_howto_type *`
423			`coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)`
424			`bfd *abfd ATTRIBUTE_UNUSED;`
425			`asection *sec;`
426			`struct internal_reloc *rel;`
427			`struct coff_link_hash_entry *h;`
428			`struct internal_syment *sym;`
429			`bfd_vma *addendp;`
430			`{`
431			`reloc_howto_type *howto;`
432
433			`if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))`
434			`{`
435			`bfd_set_error (bfd_error_bad_value);`
436			`return NULL;`
437			`}`
438
439			`howto = howto_table + rel->r_type;`
440
441			`#ifdef COFF_WITH_PE`
442			`/* Cancel out code in _bfd_coff_generic_relocate_section. */`
443			`*addendp = 0;`
444			`#endif`
445
446			`if (howto->pc_relative)`
447			`*addendp += sec->vma;`
448
449			`if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)`
450			`{`
451			`/* This is a common symbol. The section contents include the`
452			`size (sym->n_value) as an addend. The relocate_section`
453			`function will be adding in the final value of the symbol. We`
454			`need to subtract out the current size in order to get the`
455			`correct result. */`
456
457			`BFD_ASSERT (h != NULL);`
458
459			`#ifndef COFF_WITH_PE`
460			`/* I think we do want to bypass this. If we don't, I have`
461			`seen some data parameters get the wrong relocation address.`
462			`If I link two versions with and without this section bypassed`
463			`and then do a binary comparison, the addresses which are`
464			`different can be looked up in the map. The case in which`
465			`this section has been bypassed has addresses which correspond`
466			`to values I can find in the map. */`
467			`*addendp -= sym->n_value;`
468			`#endif`
469			`}`
470
471			`#ifndef COFF_WITH_PE`
472			`/* If the output symbol is common (in which case this must be a`
473			`relocateable link), we need to add in the final size of the`
474			`common symbol. */`
475			`if (h != NULL && h->root.type == bfd_link_hash_common)`
476			`*addendp += h->root.u.c.size;`
477			`#endif`
478
479			`#ifdef COFF_WITH_PE`
480			`if (howto->pc_relative)`
481			`{`
482			`*addendp -= 4;`
483
484			`/* If the symbol is defined, then the generic code is going to`
485			`add back the symbol value in order to cancel out an`
486			`adjustment it made to the addend. However, we set the addend`
487			`to 0 at the start of this function. We need to adjust here,`
488			`to avoid the adjustment the generic code will make. FIXME:`
489			`This is getting a bit hackish. */`
490			`if (sym != NULL && sym->n_scnum != 0)`
491			`*addendp -= sym->n_value;`
492			`}`
493
494			`if (rel->r_type == R_IMAGEBASE`
495			`&& (bfd_get_flavour(sec->output_section->owner)`
496			`== bfd_target_coff_flavour))`
497			`{`
498			`*addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;`
499			`}`
500			`#endif`
501
502			`return howto;`
503			`}`
504
505			`#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup`
506
507			`static reloc_howto_type *`
508			`coff_i386_reloc_type_lookup (abfd, code)`
509			`bfd *abfd ATTRIBUTE_UNUSED;`
510			`bfd_reloc_code_real_type code;`
511			`{`
512			`switch (code)`
513			`{`
514			`case BFD_RELOC_RVA:`
515			`return howto_table + R_IMAGEBASE;`
516			`case BFD_RELOC_32:`
517			`return howto_table + R_DIR32;`
518			`case BFD_RELOC_32_PCREL:`
519			`return howto_table + R_PCRLONG;`
520			`case BFD_RELOC_16:`
521			`return howto_table + R_RELWORD;`
522			`case BFD_RELOC_16_PCREL:`
523			`return howto_table + R_PCRWORD;`
524			`case BFD_RELOC_8:`
525			`return howto_table + R_RELBYTE;`
526			`case BFD_RELOC_8_PCREL:`
527			`return howto_table + R_PCRBYTE;`
528			`default:`
529			`BFD_FAIL ();`
530			`return 0;`
531			`}`
532			`}`
533
534			`#define coff_rtype_to_howto coff_i386_rtype_to_howto`
535
536			`#ifdef TARGET_UNDERSCORE`
537
538			`/* If i386 gcc uses underscores for symbol names, then it does not use`
539			`a leading dot for local labels, so if TARGET_UNDERSCORE is defined`
540			`we treat all symbols starting with L as local. */`
541
542			`static boolean coff_i386_is_local_label_name PARAMS ((bfd , const char ));`
543
544			`static boolean`
545			`coff_i386_is_local_label_name (abfd, name)`
546			`bfd *abfd;`
547			`const char *name;`
548			`{`
549			`if (name[0] == 'L')`
550			`return true;`
551
552			`return _bfd_coff_is_local_label_name (abfd, name);`
553			`}`
554
555			`#define coff_bfd_is_local_label_name coff_i386_is_local_label_name`
556
557			`#endif /* TARGET_UNDERSCORE */`
558
559			`#include "coffcode.h"`
560
561			`const bfd_target`
562			`#ifdef TARGET_SYM`
563			`TARGET_SYM =`
564			`#else`
565			`i386coff_vec =`
566			`#endif`
567			`{`
568			`#ifdef TARGET_NAME`
569			`TARGET_NAME,`
570			`#else`
571			`"coff-i386", /* name */`
572			`#endif`
573			`bfd_target_coff_flavour,`
574			`BFD_ENDIAN_LITTLE, /* data byte order is little */`
575			`BFD_ENDIAN_LITTLE, /* header byte order is little */`
576
577			`(HAS_RELOC \| EXEC_P \| /* object flags */`
578			`HAS_LINENO \| HAS_DEBUG \|`
579			`HAS_SYMS \| HAS_LOCALS \| WP_TEXT \| D_PAGED),`
580
581			`(SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC /* section flags */`
582			`#ifdef COFF_WITH_PE`
583			`\| SEC_LINK_ONCE \| SEC_LINK_DUPLICATES \| SEC_READONLY`
584			`#endif`
585			`\| SEC_CODE \| SEC_DATA),`
586
587			`#ifdef TARGET_UNDERSCORE`
588			`TARGET_UNDERSCORE, /* leading underscore */`
589			`#else`
590			`0, /* leading underscore */`
591			`#endif`
592			`'/', /* ar_pad_char */`
593			`15, /* ar_max_namelen */`
594
595			`bfd_getl64, bfd_getl_signed_64, bfd_putl64,`
596			`bfd_getl32, bfd_getl_signed_32, bfd_putl32,`
597			`bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */`
598			`bfd_getl64, bfd_getl_signed_64, bfd_putl64,`
599			`bfd_getl32, bfd_getl_signed_32, bfd_putl32,`
600			`bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */`
601
602			`/* Note that we allow an object file to be treated as a core file as well. */`
603			`{_bfd_dummy_target, coff_object_p, /* bfd_check_format */`
604			`bfd_generic_archive_p, coff_object_p},`
605			`{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */`
606			`bfd_false},`
607			`{bfd_false, coff_write_object_contents, /* bfd_write_contents */`
608			`_bfd_write_archive_contents, bfd_false},`
609
610			`BFD_JUMP_TABLE_GENERIC (coff),`
611			`BFD_JUMP_TABLE_COPY (coff),`
612			`BFD_JUMP_TABLE_CORE (_bfd_nocore),`
613			`BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),`
614			`BFD_JUMP_TABLE_SYMBOLS (coff),`
615			`BFD_JUMP_TABLE_RELOCS (coff),`
616			`BFD_JUMP_TABLE_WRITE (coff),`
617			`BFD_JUMP_TABLE_LINK (coff),`
618			`BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),`
619
620			`NULL,`
621
622			`COFF_SWAP_TABLE`
623			`};`