Add x86_64-mingw64 target

1 files changed, 768 insertions, 0 deletions

diff --git a/bfd/coff-x86_64.c b/bfd/coff-x86_64.c
new file mode 100644
index 00000000000..772e1ebf7c3
--- /dev/null
+++ b/bfd/coff-x86_64.c
@@ -0,0 +1,768 @@
+/* BFD back-end for AMD 64 COFF files.
+   Copyright 2006 Free Software Foundation, Inc.
+
+   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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+   
+   Written by Kai Tietz, OneVision Software GmbH&CoKg.  */
+
+#ifndef COFF_WITH_pex64
+#define COFF_WITH_pex64
+#endif
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "coff/x86_64.h"
+#include "coff/internal.h"
+#include "coff/pe.h"
+#include "libcoff.h"
+#include "libiberty.h"
+
+#define BADMAG(x) AMD64BADMAG(x)
+
+#ifdef COFF_WITH_pex64
+# undef  AOUTSZ
+# define AOUTSZ		PEPAOUTSZ
+# define PEAOUTHDR	PEPAOUTHDR
+#endif
+
+#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 AMD 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 relocatable 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_amd64_reloc (bfd *abfd,
+		  arelent *reloc_entry,
+		  asymbol *symbol,
+		  void * data,
+		  asection *input_section ATTRIBUTE_UNUSED,
+		  bfd *output_bfd,
+		  char **error_message ATTRIBUTE_UNUSED)
+{
+  symvalue diff;
+
+#if !defined(COFF_WITH_PE)
+  if (output_bfd == NULL)
+    return bfd_reloc_continue;
+#endif
+
+  if (bfd_is_com_section (symbol->section))
+    {
+#if !defined(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
+	 relocatable output.  This seems to be always wrong for 386
+	 COFF, so we handle the addend here instead.  */
+#if defined(COFF_WITH_PE)
+      if (output_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-amd64.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 if(symbol->flags & BSF_WEAK)
+	    diff = reloc_entry->addend - symbol->value;
+	  else
+	    diff = -reloc_entry->addend;
+	}
+      else
+#endif
+	diff = reloc_entry->addend;
+    }
+
+#if defined(COFF_WITH_PE)
+  /* FIXME: How should this case be handled?  */
+  if (reloc_entry->howto->type == R_AMD64_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;
+	  case 4:
+	    {
+	      long long x = bfd_get_64 (abfd, addr);
+	      DOIT (x);
+	      bfd_put_64 (abfd, (bfd_vma) x, addr);
+	    }
+	    break;
+
+	  default:
+	    abort ();
+	  }
+      }
+
+  /* Now let bfd_perform_relocation finish everything up.  */
+  return bfd_reloc_continue;
+}
+
+#if defined(COFF_WITH_PE)
+/* Return TRUE if this relocation should appear in the output .reloc
+   section.  */
+
+static bfd_boolean
+in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
+{
+  return ! howto->pc_relative && howto->type != R_AMD64_IMAGEBASE;
+}
+#endif /* COFF_WITH_PE */
+
+#ifndef PCRELOFFSET
+#define PCRELOFFSET TRUE
+#endif
+
+static reloc_howto_type howto_table[] =
+{
+  EMPTY_HOWTO (0),
+  HOWTO (R_AMD64_DIR64,		/* type  1*/
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long, 4 = long long) */
+	 64,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "R_X86_64_64",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffffffffffffll,	/* src_mask */
+	 0xffffffffffffffffll,	/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+  HOWTO (R_AMD64_DIR32,		/* type 2 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 FALSE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "R_X86_64_32",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+  /* PE IMAGE_REL_AMD64_ADDR32NB relocation (3).	*/
+  HOWTO (R_AMD64_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_amd64_reloc,	/* special_function */
+	 "rva32",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 FALSE),		/* pcrel_offset */
+  /* 32-bit longword PC relative relocation (4).  */
+  HOWTO (R_AMD64_PCRLONG,	/* type 4 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "R_X86_64_PC32",	/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+
+ HOWTO (R_AMD64_PCRLONG_1,	/* type 5 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "DISP32+1",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+ HOWTO (R_AMD64_PCRLONG_2,	/* type 6 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "DISP32+2",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+ HOWTO (R_AMD64_PCRLONG_3,	/* type 7 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "DISP32+3",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+ HOWTO (R_AMD64_PCRLONG_4,	/* type 8 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "DISP32+4",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+ HOWTO (R_AMD64_PCRLONG_5,	/* type 9 */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 TRUE,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 coff_amd64_reloc,	/* special_function */
+	 "DISP32+5",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  EMPTY_HOWTO (10), /* R_AMD64_SECTION 10  */
+#if defined(COFF_WITH_PE)
+  /* 32-bit longword section relative relocation (11).  */
+  HOWTO (R_AMD64_SECREL,	/* 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_amd64_reloc,	/* special_function */
+	 "secrel32",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 TRUE),			/* pcrel_offset */
+#else
+  EMPTY_HOWTO (11),
+#endif
+  EMPTY_HOWTO (12),
+  EMPTY_HOWTO (13),
+#ifndef DONT_EXTEND_AMD64
+  HOWTO (R_AMD64_PCRQUAD,
+         0,                     /* rightshift */
+         4,                     /* size (0 = byte, 1 = short, 2 = long) */
+         64,                    /* bitsize */
+         TRUE,                  /* pc_relative */
+         0,                     /* bitpos */
+         complain_overflow_signed, /* complain_on_overflow */
+         coff_amd64_reloc,      /* special_function */
+         "R_X86_64_PC64",       /* name */
+         TRUE,                  /* partial_inplace */
+         0xffffffffffffffffll,  /* src_mask */
+         0xffffffffffffffffll,  /* dst_mask */
+         PCRELOFFSET),           /* pcrel_offset */
+#else
+  EMPTY_HOWTO (14),
+#endif
+  /* Byte relocation (15).  */
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_8",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0x000000ff,		/* src_mask */
+	 0x000000ff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  /* 16-bit word relocation (16).  */
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_16",		/* name */
+	 TRUE,			/* partial_inplace */
+	 0x0000ffff,		/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  /* 32-bit longword relocation (17).	*/
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_32S",	/* name */
+	 TRUE,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  /* Byte PC relative relocation (18).	 */
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_PC8",	/* name */
+	 TRUE,			/* partial_inplace */
+	 0x000000ff,		/* src_mask */
+	 0x000000ff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  /* 16-bit word PC relative relocation (19).	*/
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_PC16",	/* name */
+	 TRUE,			/* partial_inplace */
+	 0x0000ffff,		/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 PCRELOFFSET),		/* pcrel_offset */
+  /* 32-bit longword PC relative relocation (20).  */
+  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_amd64_reloc,	/* special_function */
+	 "R_X86_64_PC32",	/* 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 I386  1			/* Customize coffcode.h */
+#define AMD64 1
+
+#define RTYPE2HOWTO(cache_ptr, dst)		\
+  ((cache_ptr)->howto =				\
+   ((dst)->r_type < ARRAY_SIZE (howto_table))	\
+    ? 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 = 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 != 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 != 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 AMD64 COFF, we
+   can use the generic relocate_section routine.  For PE, we need our
+   own routine.  */
+
+#if !defined(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
+   relocatable link.  */
+
+static bfd_boolean
+coff_pe_amd64_relocate_section (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->relocatable)
+    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_amd64_relocate_section
+
+#endif /* COFF_WITH_PE */
+
+/* Convert an rtype to howto for the COFF backend linker.  */
+
+static reloc_howto_type *
+coff_amd64_rtype_to_howto (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 > ARRAY_SIZE (howto_table))
+    {
+      bfd_set_error (bfd_error_bad_value);
+      return NULL;
+    }
+  if (rel->r_type >= R_AMD64_PCRLONG_1 && rel->r_type <= R_AMD64_PCRLONG_5)
+    {
+      rel->r_vaddr += (bfd_vma)(rel->r_type-R_AMD64_PCRLONG);
+      rel->r_type = R_AMD64_PCRLONG;
+    }
+  howto = howto_table + rel->r_type;
+
+#if defined(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);
+
+#if !defined(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
+    }
+
+#if !defined(COFF_WITH_PE)
+  /* If the output symbol is common (in which case this must be a
+     relocatable 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
+
+#if defined(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_AMD64_IMAGEBASE
+      && (bfd_get_flavour (sec->output_section->owner) == bfd_target_coff_flavour))
+    *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
+
+  if (rel->r_type == R_AMD64_SECREL)
+    {
+      bfd_vma osect_vma;
+
+      if (h && (h->type == bfd_link_hash_defined || h->type == bfd_link_hash_defweak))
+	osect_vma = h->root.u.def.section->output_section->vma;
+      else
+	{
+	  asection *sec;
+	  int i;
+
+	  /* Sigh, the only way to get the section to offset against
+	     is to find it the hard way.  */
+	  for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++)
+	    sec = sec->next;
+
+	  osect_vma = sec->output_section->vma;
+	}
+
+      *addendp -= osect_vma;
+    }
+#endif
+
+  return howto;
+}
+
+#define coff_bfd_reloc_type_lookup coff_amd64_reloc_type_lookup
+
+static reloc_howto_type *
+coff_amd64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
+{
+  switch (code)
+    {
+    case BFD_RELOC_RVA:
+      return howto_table + R_AMD64_IMAGEBASE;
+    case BFD_RELOC_32:
+      return howto_table + R_AMD64_DIR32;
+    case BFD_RELOC_64:
+      return howto_table + R_AMD64_DIR64;
+    case BFD_RELOC_64_PCREL:
+#ifndef DONT_EXTEND_AMD64
+      return howto_table + R_AMD64_PCRQUAD;
+#else
+      /* Fall through.  */
+#endif
+    case BFD_RELOC_32_PCREL:
+      return howto_table + R_AMD64_PCRLONG;
+    case BFD_RELOC_X86_64_32S:
+      return howto_table + R_RELLONG;
+    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;
+#if defined(COFF_WITH_PE)
+    case BFD_RELOC_32_SECREL:
+      return howto_table + R_AMD64_SECREL;
+#endif
+    default:
+      BFD_FAIL ();
+      return 0;
+    }
+}
+
+#define coff_rtype_to_howto coff_amd64_rtype_to_howto
+
+#ifdef TARGET_UNDERSCORE
+
+/* If amd64 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 bfd_boolean
+coff_amd64_is_local_label_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_amd64_is_local_label_name
+
+#endif /* TARGET_UNDERSCORE */
+
+#include "coffcode.h"
+
+#ifdef PE
+#define amd64coff_object_p pe_bfd_object_p
+#else
+#define amd64coff_object_p coff_object_p
+#endif
+
+const bfd_target
+#ifdef TARGET_SYM
+  TARGET_SYM =
+#else
+  x86_64coff_vec =
+#endif
+{
+#ifdef TARGET_NAME
+  TARGET_NAME,
+#else
+ "coff-x86-64",			/* 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.  */
+#if defined(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, amd64coff_object_p, /* BFD_check_format.  */
+    bfd_generic_archive_p, amd64coff_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
+};