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/* Support for the generic parts of PE/PEI, for BFD.
   Copyright 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   Written by Cygnus Solutions.
 
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.  */
 
/*
Most of this hacked by  Steve Chamberlain,
			sac@cygnus.com
 
PE/PEI rearrangement (and code added): Donn Terry
                                       Softway Systems, Inc.
*/
 
/* Hey look, some documentation [and in a place you expect to find it]!
 
   The main reference for the pei format is "Microsoft Portable Executable
   and Common Object File Format Specification 4.1".  Get it if you need to
   do some serious hacking on this code.
 
   Another reference:
   "Peering Inside the PE: A Tour of the Win32 Portable Executable
   File Format", MSJ 1994, Volume 9.
 
   The *sole* difference between the pe format and the pei format is that the
   latter has an MSDOS 2.0 .exe header on the front that prints the message
   "This app must be run under Windows." (or some such).
   (FIXME: Whether that statement is *really* true or not is unknown.
   Are there more subtle differences between pe and pei formats?
   For now assume there aren't.  If you find one, then for God sakes
   document it here!)
 
   The Microsoft docs use the word "image" instead of "executable" because
   the former can also refer to a DLL (shared library).  Confusion can arise
   because the `i' in `pei' also refers to "image".  The `pe' format can
   also create images (i.e. executables), it's just that to run on a win32
   system you need to use the pei format.
 
   FIXME: Please add more docs here so the next poor fool that has to hack
   on this code has a chance of getting something accomplished without
   wasting too much time.
*/
 
#include "libpei.h"
 
static boolean (*pe_saved_coff_bfd_print_private_bfd_data)
    PARAMS ((bfd *, PTR)) =
#ifndef coff_bfd_print_private_bfd_data
     NULL;
#else
     coff_bfd_print_private_bfd_data;
#undef coff_bfd_print_private_bfd_data
#endif
 
static boolean pe_print_private_bfd_data PARAMS ((bfd *, PTR));
#define coff_bfd_print_private_bfd_data pe_print_private_bfd_data
 
 
static boolean (*pe_saved_coff_bfd_copy_private_bfd_data)
    PARAMS ((bfd *, bfd *)) =
#ifndef coff_bfd_copy_private_bfd_data
     NULL;
#else
     coff_bfd_copy_private_bfd_data;
#undef coff_bfd_copy_private_bfd_data
#endif
 
static boolean pe_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
#define coff_bfd_copy_private_bfd_data pe_bfd_copy_private_bfd_data
 
#define coff_mkobject      pe_mkobject
#define coff_mkobject_hook pe_mkobject_hook
 
#ifndef NO_COFF_RELOCS
static void coff_swap_reloc_in PARAMS ((bfd *, PTR, PTR));
static unsigned int coff_swap_reloc_out PARAMS ((bfd *, PTR, PTR));
#endif
static void coff_swap_filehdr_in PARAMS ((bfd *, PTR, PTR));
static void coff_swap_scnhdr_in PARAMS ((bfd *, PTR, PTR));
static boolean pe_mkobject PARAMS ((bfd *));
static PTR pe_mkobject_hook PARAMS ((bfd *, PTR, PTR));
 
#ifdef COFF_IMAGE_WITH_PE
/* This structure contains static variables used by the ILF code.  */
typedef asection * asection_ptr;
 
typedef struct
{
  bfd *			abfd;
  bfd_byte *		data;
  struct bfd_in_memory * bim;
  unsigned short        magic;
 
  arelent *		reltab;
  unsigned int 		relcount;
 
  coff_symbol_type * 	sym_cache;
  coff_symbol_type * 	sym_ptr;
  unsigned int       	sym_index;
 
  unsigned int * 	sym_table;
  unsigned int * 	table_ptr;
 
  combined_entry_type * native_syms;
  combined_entry_type * native_ptr;
 
  coff_symbol_type **	sym_ptr_table;
  coff_symbol_type **	sym_ptr_ptr;
 
  unsigned int		sec_index;
 
  char *                string_table;
  char *                string_ptr;
  char *		end_string_ptr;
 
  SYMENT *              esym_table;
  SYMENT *              esym_ptr;
 
  struct internal_reloc * int_reltab;
}
pe_ILF_vars;
 
static asection_ptr       pe_ILF_make_a_section   PARAMS ((pe_ILF_vars *, const char *, unsigned int, flagword));
static void               pe_ILF_make_a_reloc     PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type, asection_ptr));
static void               pe_ILF_make_a_symbol    PARAMS ((pe_ILF_vars *, const char *, const char *, asection_ptr, flagword));
static void               pe_ILF_save_relocs      PARAMS ((pe_ILF_vars *, asection_ptr));
static void		  pe_ILF_make_a_symbol_reloc  PARAMS ((pe_ILF_vars *, bfd_vma, bfd_reloc_code_real_type,	   struct symbol_cache_entry **, unsigned int));
static boolean            pe_ILF_build_a_bfd      PARAMS ((bfd *, unsigned short, bfd_byte *, bfd_byte *, unsigned int, unsigned int));
static const bfd_target * pe_ILF_object_p         PARAMS ((bfd *));
static const bfd_target * pe_bfd_object_p 	  PARAMS ((bfd *));
#endif /* COFF_IMAGE_WITH_PE */
 
/**********************************************************************/
 
#ifndef NO_COFF_RELOCS
static void
coff_swap_reloc_in (abfd, src, dst)
     bfd *abfd;
     PTR src;
     PTR dst;
{
  RELOC *reloc_src = (RELOC *) src;
  struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
 
  reloc_dst->r_vaddr = bfd_h_get_32(abfd, (bfd_byte *)reloc_src->r_vaddr);
  reloc_dst->r_symndx = bfd_h_get_signed_32(abfd, (bfd_byte *) reloc_src->r_symndx);
 
  reloc_dst->r_type = bfd_h_get_16(abfd, (bfd_byte *) reloc_src->r_type);
 
#ifdef SWAP_IN_RELOC_OFFSET
  reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET(abfd,
					     (bfd_byte *) reloc_src->r_offset);
#endif
}
 
 
static unsigned int
coff_swap_reloc_out (abfd, src, dst)
     bfd       *abfd;
     PTR	src;
     PTR	dst;
{
  struct internal_reloc *reloc_src = (struct internal_reloc *)src;
  struct external_reloc *reloc_dst = (struct external_reloc *)dst;
  bfd_h_put_32(abfd, reloc_src->r_vaddr, (bfd_byte *) reloc_dst->r_vaddr);
  bfd_h_put_32(abfd, reloc_src->r_symndx, (bfd_byte *) reloc_dst->r_symndx);
 
  bfd_h_put_16(abfd, reloc_src->r_type, (bfd_byte *)
	       reloc_dst->r_type);
 
#ifdef SWAP_OUT_RELOC_OFFSET
  SWAP_OUT_RELOC_OFFSET(abfd,
			reloc_src->r_offset,
			(bfd_byte *) reloc_dst->r_offset);
#endif
#ifdef SWAP_OUT_RELOC_EXTRA
  SWAP_OUT_RELOC_EXTRA(abfd,reloc_src, reloc_dst);
#endif
  return RELSZ;
}
#endif /* not NO_COFF_RELOCS */
 
static void
coff_swap_filehdr_in (abfd, src, dst)
     bfd            *abfd;
     PTR	     src;
     PTR	     dst;
{
  FILHDR *filehdr_src = (FILHDR *) src;
  struct internal_filehdr *filehdr_dst = (struct internal_filehdr *) dst;
  filehdr_dst->f_magic = bfd_h_get_16(abfd, (bfd_byte *) filehdr_src->f_magic);
  filehdr_dst->f_nscns = bfd_h_get_16(abfd, (bfd_byte *)filehdr_src-> f_nscns);
  filehdr_dst->f_timdat = bfd_h_get_32(abfd, (bfd_byte *)filehdr_src-> f_timdat);
 
  filehdr_dst->f_nsyms = bfd_h_get_32(abfd, (bfd_byte *)filehdr_src-> f_nsyms);
  filehdr_dst->f_flags = bfd_h_get_16(abfd, (bfd_byte *)filehdr_src-> f_flags);
  filehdr_dst->f_symptr = bfd_h_get_32 (abfd, (bfd_byte *) filehdr_src->f_symptr);
 
#ifdef COFF_IMAGE_WITH_PE
  /* There are really two magic numbers involved; the magic number
     that says this is a NT executable (PEI) and the magic number that
     determines the architecture.  The former is DOSMAGIC, stored in
     the e_magic field.  The latter is stored in the f_magic field.
     If the NT magic number isn't valid, the architecture magic number
     could be mimicked by some other field (specifically, the number
     of relocs in section 3).  Since this routine can only be called
     correctly for a PEI file, check the e_magic number here, and, if
     it doesn't match, clobber the f_magic number so that we don't get
     a false match.  */
  if (bfd_h_get_16 (abfd, (bfd_byte *) filehdr_src->e_magic) != DOSMAGIC)
    filehdr_dst->f_magic = -1;
#endif
 
  /* Other people's tools sometimes generate headers with an nsyms but
     a zero symptr.  */
  if (filehdr_dst->f_nsyms != 0 && filehdr_dst->f_symptr == 0)
    {
      filehdr_dst->f_nsyms = 0;
      filehdr_dst->f_flags |= F_LSYMS;
    }
 
  filehdr_dst->f_opthdr = bfd_h_get_16(abfd, 
				       (bfd_byte *)filehdr_src-> f_opthdr);
}
 
#ifdef COFF_IMAGE_WITH_PE
#define coff_swap_filehdr_out _bfd_pei_only_swap_filehdr_out
#else
#define coff_swap_filehdr_out _bfd_pe_only_swap_filehdr_out
#endif
 
 
static void
coff_swap_scnhdr_in (abfd, ext, in)
     bfd            *abfd;
     PTR	     ext;
     PTR	     in;
{
  SCNHDR *scnhdr_ext = (SCNHDR *) ext;
  struct internal_scnhdr *scnhdr_int = (struct internal_scnhdr *) in;
 
  memcpy(scnhdr_int->s_name, scnhdr_ext->s_name, sizeof(scnhdr_int->s_name));
  scnhdr_int->s_vaddr =
    GET_SCNHDR_VADDR (abfd, (bfd_byte *) scnhdr_ext->s_vaddr);
  scnhdr_int->s_paddr =
    GET_SCNHDR_PADDR (abfd, (bfd_byte *) scnhdr_ext->s_paddr);
  scnhdr_int->s_size =
    GET_SCNHDR_SIZE (abfd, (bfd_byte *) scnhdr_ext->s_size);
  scnhdr_int->s_scnptr =
    GET_SCNHDR_SCNPTR (abfd, (bfd_byte *) scnhdr_ext->s_scnptr);
  scnhdr_int->s_relptr =
    GET_SCNHDR_RELPTR (abfd, (bfd_byte *) scnhdr_ext->s_relptr);
  scnhdr_int->s_lnnoptr =
    GET_SCNHDR_LNNOPTR (abfd, (bfd_byte *) scnhdr_ext->s_lnnoptr);
  scnhdr_int->s_flags = bfd_h_get_32(abfd, (bfd_byte *) scnhdr_ext->s_flags);
 
  /* MS handles overflow of line numbers by carrying into the reloc
     field (it appears).  Since it's supposed to be zero for PE
     *IMAGE* format, that's safe.  This is still a bit iffy.  */
#ifdef COFF_IMAGE_WITH_PE
  scnhdr_int->s_nlnno =
    (bfd_h_get_16 (abfd, (bfd_byte *) scnhdr_ext->s_nlnno)
     + (bfd_h_get_16 (abfd, (bfd_byte *) scnhdr_ext->s_nreloc) << 16));
  scnhdr_int->s_nreloc = 0;
#else
  scnhdr_int->s_nreloc = bfd_h_get_16 (abfd,
				       (bfd_byte *) scnhdr_ext->s_nreloc);
  scnhdr_int->s_nlnno = bfd_h_get_16 (abfd,
				      (bfd_byte *) scnhdr_ext->s_nlnno);
#endif
 
  if (scnhdr_int->s_vaddr != 0) 
    {
      scnhdr_int->s_vaddr += pe_data (abfd)->pe_opthdr.ImageBase;
      scnhdr_int->s_vaddr &= 0xffffffff;
    }
 
#ifndef COFF_NO_HACK_SCNHDR_SIZE
  /* If this section holds uninitialized data, use the virtual size
     (stored in s_paddr) instead of the physical size.  */
  if ((scnhdr_int->s_flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) != 0)
    {
      scnhdr_int->s_size = scnhdr_int->s_paddr;
      /* This code used to set scnhdr_int->s_paddr to 0.  However,
         coff_set_alignment_hook stores s_paddr in virt_size, which
         only works if it correctly holds the virtual size of the
         section.  */
    }
#endif
}
 
static boolean
pe_mkobject (abfd)
     bfd * abfd;
{
  pe_data_type *pe;
  abfd->tdata.pe_obj_data = 
    (struct pe_tdata *) bfd_zalloc (abfd, sizeof (pe_data_type));
 
  if (abfd->tdata.pe_obj_data == 0)
    return false;
 
  pe = pe_data (abfd);
 
  pe->coff.pe = 1;
 
  /* in_reloc_p is architecture dependent.  */
  pe->in_reloc_p = in_reloc_p;
  return true;
}
 
/* Create the COFF backend specific information.  */
static PTR
pe_mkobject_hook (abfd, filehdr, aouthdr)
     bfd * abfd;
     PTR filehdr;
     PTR aouthdr ATTRIBUTE_UNUSED;
{
  struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
  pe_data_type *pe;
 
  if (pe_mkobject (abfd) == false)
    return NULL;
 
  pe = pe_data (abfd);
  pe->coff.sym_filepos = internal_f->f_symptr;
  /* These members communicate important constants about the symbol
     table to GDB's symbol-reading code.  These `constants'
     unfortunately vary among coff implementations...  */
  pe->coff.local_n_btmask = N_BTMASK;
  pe->coff.local_n_btshft = N_BTSHFT;
  pe->coff.local_n_tmask = N_TMASK;
  pe->coff.local_n_tshift = N_TSHIFT;
  pe->coff.local_symesz = SYMESZ;
  pe->coff.local_auxesz = AUXESZ;
  pe->coff.local_linesz = LINESZ;
 
  pe->coff.timestamp = internal_f->f_timdat;
 
  obj_raw_syment_count (abfd) =
    obj_conv_table_size (abfd) =
      internal_f->f_nsyms;
 
  pe->real_flags = internal_f->f_flags;
 
  if ((internal_f->f_flags & F_DLL) != 0)
    pe->dll = 1;
 
  if ((internal_f->f_flags & IMAGE_FILE_DEBUG_STRIPPED) == 0)
    abfd->flags |= HAS_DEBUG;
 
#ifdef COFF_IMAGE_WITH_PE
  if (aouthdr) 
    pe->pe_opthdr = ((struct internal_aouthdr *)aouthdr)->pe;
#endif
 
#ifdef ARM 
  if (! _bfd_coff_arm_set_private_flags (abfd, internal_f->f_flags))
    coff_data (abfd) ->flags = 0;
#endif
 
  return (PTR) pe;
}
 
static boolean
pe_print_private_bfd_data (abfd, vfile)
     bfd *abfd;
     PTR vfile;
{
  FILE *file = (FILE *) vfile;
 
  if (!_bfd_pe_print_private_bfd_data_common (abfd, vfile))
    return false;
 
  if (pe_saved_coff_bfd_print_private_bfd_data != NULL)
    {
      fputc ('\n', file);
 
      return pe_saved_coff_bfd_print_private_bfd_data (abfd, vfile);
    }
 
  return true;
}
 
/* Copy any private info we understand from the input bfd
   to the output bfd.  */
 
static boolean
pe_bfd_copy_private_bfd_data (ibfd, obfd)
     bfd *ibfd, *obfd;
{
  if (!_bfd_pe_bfd_copy_private_bfd_data_common (ibfd, obfd))
    return false;
 
  if (pe_saved_coff_bfd_copy_private_bfd_data)
    return pe_saved_coff_bfd_copy_private_bfd_data (ibfd, obfd);
 
  return true;
}
 
#define coff_bfd_copy_private_section_data \
  _bfd_pe_bfd_copy_private_section_data
 
#define coff_get_symbol_info _bfd_pe_get_symbol_info
 
#ifdef COFF_IMAGE_WITH_PE

/* Code to handle Microsoft's Image Library Format.
   Also known as LINK6 format.
   Documentation about this format can be found at: 
 
   http://msdn.microsoft.com/library/specs/pecoff_section8.htm  */
 
/* The following constants specify the sizes of the various data
   structures that we have to create in order to build a bfd describing
   an ILF object file.  The final "+ 1" in the definitions of SIZEOF_IDATA6
   and SIZEOF_IDATA7 below is to allow for the possibility that we might
   need a padding byte in order to ensure 16 bit alignment for the section's
   contents.
 
   The value for SIZEOF_ILF_STRINGS is computed as follows:
 
      There will be NUM_ILF_SECTIONS section symbols.  Allow 9 characters
      per symbol for their names (longest section name is .idata$x).
 
      There will be two symbols for the imported value, one the symbol name
      and one with _imp__ prefixed.  Allowing for the terminating nul's this
      is strlen (symbol_name) * 2 + 8 + 21 + strlen (source_dll).
 
      The strings in the string table must start STRING__SIZE_SIZE bytes into
      the table in order to for the string lookup code in coffgen/coffcode to
      work.  */
#define NUM_ILF_RELOCS		8
#define NUM_ILF_SECTIONS        6
#define NUM_ILF_SYMS 		(2 + NUM_ILF_SECTIONS)
 
#define SIZEOF_ILF_SYMS		(NUM_ILF_SYMS * sizeof (* vars.sym_cache))
#define SIZEOF_ILF_SYM_TABLE	(NUM_ILF_SYMS * sizeof (* vars.sym_table))
#define SIZEOF_ILF_NATIVE_SYMS	(NUM_ILF_SYMS * sizeof (* vars.native_syms))
#define SIZEOF_ILF_SYM_PTR_TABLE (NUM_ILF_SYMS * sizeof (* vars.sym_ptr_table))
#define SIZEOF_ILF_EXT_SYMS	(NUM_ILF_SYMS * sizeof (* vars.esym_table))
#define SIZEOF_ILF_RELOCS	(NUM_ILF_RELOCS * sizeof (* vars.reltab))
#define SIZEOF_ILF_INT_RELOCS	(NUM_ILF_RELOCS * sizeof (* vars.int_reltab))
#define SIZEOF_ILF_STRINGS	(strlen (symbol_name) * 2 + 8 \
					+ 21 + strlen (source_dll) \
					+ NUM_ILF_SECTIONS * 9 \
					+ STRING_SIZE_SIZE)
#define SIZEOF_IDATA2		(5 * 4)
#define SIZEOF_IDATA4		(1 * 4)
#define SIZEOF_IDATA5		(1 * 4)
#define SIZEOF_IDATA6		(2 + strlen (symbol_name) + 1 + 1)
#define SIZEOF_IDATA7		(strlen (source_dll) + 1 + 1)
#define SIZEOF_ILF_SECTIONS     (NUM_ILF_SECTIONS * sizeof (struct coff_section_tdata))
 
#define ILF_DATA_SIZE				\
      sizeof (* vars.bim)			\
    + SIZEOF_ILF_SYMS				\
    + SIZEOF_ILF_SYM_TABLE			\
    + SIZEOF_ILF_NATIVE_SYMS			\
    + SIZEOF_ILF_SYM_PTR_TABLE			\
    + SIZEOF_ILF_EXT_SYMS			\
    + SIZEOF_ILF_RELOCS				\
    + SIZEOF_ILF_INT_RELOCS			\
    + SIZEOF_ILF_STRINGS			\
    + SIZEOF_IDATA2				\
    + SIZEOF_IDATA4				\
    + SIZEOF_IDATA5				\
    + SIZEOF_IDATA6				\
    + SIZEOF_IDATA7				\
    + SIZEOF_ILF_SECTIONS			\
    + MAX_TEXT_SECTION_SIZE
 
 
/* Create an empty relocation against the given symbol.  */
static void
pe_ILF_make_a_symbol_reloc (pe_ILF_vars *                 vars,
			    bfd_vma                       address,
			    bfd_reloc_code_real_type      reloc,
			    struct symbol_cache_entry **  sym,
			    unsigned int                  sym_index)
{
  arelent * entry;
  struct internal_reloc * internal;
 
  entry = vars->reltab + vars->relcount;
  internal = vars->int_reltab + vars->relcount;
 
  entry->address     = address;
  entry->addend      = 0;
  entry->howto       = bfd_reloc_type_lookup (vars->abfd, reloc);
  entry->sym_ptr_ptr = sym;
 
  internal->r_vaddr  = address;
  internal->r_symndx = sym_index;
  internal->r_type   = entry->howto->type;
#if 0  /* These fields do not need to be initialised.  */
  internal->r_size   = 0;
  internal->r_extern = 0;
  internal->r_offset = 0;
#endif
 
  vars->relcount ++;
 
  BFD_ASSERT (vars->relcount <= NUM_ILF_RELOCS);
}
 
/* Create an empty relocation against the given section.  */
static void
pe_ILF_make_a_reloc (pe_ILF_vars *             vars,
		     bfd_vma                   address,
		     bfd_reloc_code_real_type  reloc,
		     asection_ptr              sec)
{
  pe_ILF_make_a_symbol_reloc (vars, address, reloc, sec->symbol_ptr_ptr,
			      coff_section_data (vars->abfd, sec)->i);
}
 
/* Move the queued relocs into the given section.  */
static void
pe_ILF_save_relocs (pe_ILF_vars * vars,
		    asection_ptr  sec)
{
  /* Make sure that there is somewhere to store the internal relocs.  */
  if (coff_section_data (vars->abfd, sec) == NULL)
    /* We should probably return an error indication here.  */
    abort ();
 
  coff_section_data (vars->abfd, sec)->relocs = vars->int_reltab;
  coff_section_data (vars->abfd, sec)->keep_relocs = true;
 
  sec->relocation  = vars->reltab;
  sec->reloc_count = vars->relcount;
  sec->flags      |= SEC_RELOC;
 
  vars->reltab     += vars->relcount;
  vars->int_reltab += vars->relcount;
  vars->relcount   = 0;
 
  BFD_ASSERT ((bfd_byte *)vars->int_reltab < (bfd_byte *)vars->string_table);
}
 
/* Create a global symbol and add it to the relevant tables.  */
static void
pe_ILF_make_a_symbol (pe_ILF_vars *  vars,
		      const char *   prefix,
		      const char *   symbol_name,
		      asection_ptr   section,
		      flagword       extra_flags)
{
  coff_symbol_type * sym;
  combined_entry_type * ent;
  SYMENT * esym;
  unsigned short sclass;
 
  if (extra_flags & BSF_LOCAL)
    sclass = C_STAT;
  else
    sclass = C_EXT;
 
#ifdef THUMBPEMAGIC  
  if (vars->magic == THUMBPEMAGIC)
    {
      if (extra_flags & BSF_FUNCTION)
	sclass = C_THUMBEXTFUNC;
      else if (extra_flags & BSF_LOCAL)
	sclass = C_THUMBSTAT;
      else
	sclass = C_THUMBEXT;
    }
#endif
 
  BFD_ASSERT (vars->sym_index < NUM_ILF_SYMS);
 
  sym = vars->sym_ptr;
  ent = vars->native_ptr;
  esym = vars->esym_ptr;
 
  /* Copy the symbol's name into the string table.  */
  sprintf (vars->string_ptr, "%s%s", prefix, symbol_name);
 
  if (section == NULL)
    section = (asection_ptr) & bfd_und_section;
 
  /* Initialise the external symbol.  */
  bfd_h_put_32 (vars->abfd, vars->string_ptr - vars->string_table, (bfd_byte *) esym->e.e.e_offset);
  bfd_h_put_16 (vars->abfd, section->target_index, (bfd_byte *) esym->e_scnum);
  esym->e_sclass[0] = sclass;
 
  /* The following initialisations are unnecessary - the memory is
     zero initialised.  They are just kept here as reminders.  */
#if 0
  esym->e.e.e_zeroes = 0;
  esym->e_value = 0;
  esym->e_type = T_NULL;
  esym->e_numaux = 0;
#endif
 
  /* Initialise the internal symbol structure.  */
  ent->u.syment.n_sclass          = sclass;
  ent->u.syment.n_scnum           = section->target_index;
  ent->u.syment._n._n_n._n_offset = (long) sym;
 
#if 0 /* See comment above.  */
  ent->u.syment.n_value  = 0;
  ent->u.syment.n_flags  = 0;
  ent->u.syment.n_type   = T_NULL;
  ent->u.syment.n_numaux = 0;
  ent->fix_value         = 0;
#endif
 
  sym->symbol.the_bfd = vars->abfd;
  sym->symbol.name    = vars->string_ptr;
  sym->symbol.flags   = BSF_EXPORT | BSF_GLOBAL | extra_flags;
  sym->symbol.section = section;
  sym->native         = ent;
 
#if 0 /* See comment above.  */
  sym->symbol.value   = 0;
  sym->symbol.udata.i = 0;
  sym->done_lineno    = false;
  sym->lineno         = NULL;
#endif
 
  * vars->table_ptr = vars->sym_index;
  * vars->sym_ptr_ptr = sym;
 
  /* Adjust pointers for the next symbol.  */
  vars->sym_index ++;
  vars->sym_ptr ++;
  vars->sym_ptr_ptr ++;
  vars->table_ptr ++;
  vars->native_ptr ++;
  vars->esym_ptr ++;
  vars->string_ptr += strlen (symbol_name) + strlen (prefix) + 1;
 
  BFD_ASSERT (vars->string_ptr < vars->end_string_ptr);
}
 
/* Create a section.  */
static asection_ptr
pe_ILF_make_a_section (pe_ILF_vars * vars,
		       const char *  name,
		       unsigned int  size,
		       flagword      extra_flags)
{
  asection_ptr sec;
  flagword     flags;
 
  sec = bfd_make_section_old_way (vars->abfd, name);
  if (sec == NULL)
    return NULL;
 
  flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_KEEP | SEC_IN_MEMORY;
 
  bfd_set_section_flags (vars->abfd, sec, flags | extra_flags);
 
  bfd_set_section_alignment (vars->abfd, sec, 2);
 
  /* Check that we will not run out of space.  */
  BFD_ASSERT (vars->data + size < vars->bim->buffer + vars->bim->size);
 
  /* Set the section size and contents.  The actual
     contents are filled in by our parent.  */
  bfd_set_section_size (vars->abfd, sec, size);
  sec->contents = vars->data;
  sec->target_index = vars->sec_index ++;
 
  /* Advance data pointer in the vars structure.  */
  vars->data += size;
 
  /* Skip the padding byte if it was not needed.
     The logic here is that if the string length is odd,
     then the entire string length, including the null byte,
     is even and so the extra, padding byte, is not needed.  */
  if (size & 1)
    vars->data --;
 
  /* Create a coff_section_tdata structure for our use.  */
  sec->used_by_bfd = (struct coff_section_tdata *) vars->data;
  vars->data += sizeof (struct coff_section_tdata);
 
  BFD_ASSERT (vars->data <= vars->bim->buffer + vars->bim->size);
 
  /* Create a symbol to refer to this section.  */
  pe_ILF_make_a_symbol (vars, "", name, sec, BSF_LOCAL);
 
  /* Cache the index to the symbol in the coff_section_data structure.  */
  coff_section_data (vars->abfd, sec)->i = vars->sym_index - 1;
 
  return sec;
}
 
/* This structure contains the code that goes into the .text section
   in order to perform a jump into the DLL lookup table.  The entries
   in the table are index by the magic number used to represent the
   machine type in the PE file.  The contents of the data[] arrays in
   these entries are stolen from the jtab[] arrays in ld/pe-dll.c.
   The SIZE field says how many bytes in the DATA array are actually
   used.  The OFFSET field says where in the data array the address
   of the .idata$5 section should be placed.  */
#define MAX_TEXT_SECTION_SIZE 32
 
typedef struct
{
  unsigned short magic;
  unsigned char  data[MAX_TEXT_SECTION_SIZE];
  unsigned int   size;
  unsigned int   offset;
}
jump_table;
 
static jump_table jtab[] =
{
#ifdef I386MAGIC
  { I386MAGIC,
    { 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 },
    8, 2
  },
#endif
 
#ifdef  MC68MAGIC
  { MC68MAGIC, { /* XXX fill me in */ }, 0, 0 },
#endif
#ifdef  MIPS_ARCH_MAGIC_WINCE
  { MIPS_ARCH_MAGIC_WINCE,
    { 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d,
      0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 },
    16, 0
  },
#endif
 
#ifdef  SH_ARCH_MAGIC_WINCE
  { SH_ARCH_MAGIC_WINCE,
    { 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40,
      0x09, 0x00, 0x00, 0x00, 0x00, 0x00 },
    12, 8
  },
#endif
 
#ifdef  ARMPEMAGIC
  { ARMPEMAGIC,
    { 0x00, 0xc0, 0x9f, 0xe5, 0x00, 0xf0,
      0x9c, 0xe5, 0x00, 0x00, 0x00, 0x00},
    12, 8
  },
#endif
 
#ifdef  THUMBPEMAGIC
  { THUMBPEMAGIC,
    { 0x40, 0xb4, 0x02, 0x4e, 0x36, 0x68, 0xb4, 0x46,
      0x40, 0xbc, 0x60, 0x47, 0x00, 0x00, 0x00, 0x00 },
    16, 12
  },
#endif
  { 0, { 0 }, 0, 0 }
};
 
#ifndef NUM_ENTRIES
#define NUM_ENTRIES(a) (sizeof (a) / sizeof (a)[0])
#endif
 
/* Build a full BFD from the information supplied in a ILF object.  */
static boolean
pe_ILF_build_a_bfd (bfd *           abfd,
		    unsigned short  magic,
		    bfd_byte *      symbol_name,
		    bfd_byte *      source_dll,
		    unsigned int    ordinal,
		    unsigned int    types)
{ 
  bfd_byte *               ptr;
  pe_ILF_vars              vars;
  struct internal_filehdr  internal_f;
  unsigned int             import_type;
  unsigned int             import_name_type;
  asection_ptr             id4, id5, id6 = NULL, text = NULL;
  coff_symbol_type **      imp_sym;
  unsigned int             imp_index;
 
  /* Decode and verify the types field of the ILF structure.  */
  import_type = types & 0x3;
  import_name_type = (types & 0x1c) >> 2;
 
  switch (import_type)
    {
    case IMPORT_CODE:
    case IMPORT_DATA:
      break;
 
    case IMPORT_CONST:
      /* XXX code yet to be written.  */
      _bfd_error_handler (_("%s: Unhandled import type; %x"),
			  bfd_get_filename (abfd), import_type);
      return false;
 
    default:
      _bfd_error_handler (_("%s: Unrecognised import type; %x"),
			  bfd_get_filename (abfd), import_type);
      return false;
    }
 
  switch (import_name_type)
    {
    case IMPORT_ORDINAL:
    case IMPORT_NAME:
    case IMPORT_NAME_NOPREFIX:
    case IMPORT_NAME_UNDECORATE:
      break;
 
    default:
      _bfd_error_handler (_("%s: Unrecognised import name type; %x"),
			  bfd_get_filename (abfd), import_name_type);
      return false;
    }
 
  /* Initialise local variables.
 
     Note these are kept in a structure rather than being
     declared as statics since bfd frowns on global variables.
 
     We are going to construct the contents of the BFD in memory,
     so allocate all the space that we will need right now.  */
  ptr = bfd_zalloc (abfd, ILF_DATA_SIZE);
  if (ptr == NULL)
    return false;
 
  /* Create a bfd_in_memory structure.  */
  vars.bim = (struct bfd_in_memory *) ptr;
  vars.bim->buffer = ptr;
  vars.bim->size   = ILF_DATA_SIZE;
  ptr += sizeof (* vars.bim);
 
  /* Initialise the pointers to regions of the memory and the
     other contents of the pe_ILF_vars structure as well.  */
  vars.sym_cache = (coff_symbol_type *) ptr;
  vars.sym_ptr   = (coff_symbol_type *) ptr;
  vars.sym_index = 0;
  ptr += SIZEOF_ILF_SYMS;
 
  vars.sym_table = (unsigned int *) ptr;
  vars.table_ptr = (unsigned int *) ptr;
  ptr += SIZEOF_ILF_SYM_TABLE;
 
  vars.native_syms = (combined_entry_type *) ptr;
  vars.native_ptr  = (combined_entry_type *) ptr;
  ptr += SIZEOF_ILF_NATIVE_SYMS;
 
  vars.sym_ptr_table = (coff_symbol_type **) ptr;
  vars.sym_ptr_ptr   = (coff_symbol_type **) ptr;
  ptr += SIZEOF_ILF_SYM_PTR_TABLE;
 
  vars.esym_table = (SYMENT *) ptr;
  vars.esym_ptr   = (SYMENT *) ptr;
  ptr += SIZEOF_ILF_EXT_SYMS;
 
  vars.reltab   = (arelent *) ptr;
  vars.relcount = 0;
  ptr += SIZEOF_ILF_RELOCS;
 
  vars.int_reltab  = (struct internal_reloc *) ptr;
  ptr += SIZEOF_ILF_INT_RELOCS;
 
  vars.string_table = ptr;
  vars.string_ptr   = ptr + STRING_SIZE_SIZE;
  ptr += SIZEOF_ILF_STRINGS;
  vars.end_string_ptr = ptr;
 
  /* The remaining space in bim->buffer is used
     by the pe_ILF_make_a_section() function.  */
  vars.data = ptr;
  vars.abfd = abfd;
  vars.sec_index = 0;
  vars.magic = magic;
 
  /* Create the initial .idata$<n> sections:
     [.idata$2:  Import Directory Table -- not needed]
     .idata$4:  Import Lookup Table
     .idata$5:  Import Address Table
 
     Note we do not create a .idata$3 section as this is
     created for us by the linker script.  */
  id4 = pe_ILF_make_a_section (& vars, ".idata$4", SIZEOF_IDATA4, 0);
  id5 = pe_ILF_make_a_section (& vars, ".idata$5", SIZEOF_IDATA5, 0);
  if (id4 == NULL || id5 == NULL)
    return false;
 
  /* Fill in the contents of these sections.  */
  if (import_name_type == IMPORT_ORDINAL)
    {
      if (ordinal == 0)
	/* XXX - treat as IMPORT_NAME ??? */
	abort ();
 
      * (unsigned int *) id4->contents = ordinal | 0x80000000UL;
      * (unsigned int *) id5->contents = ordinal | 0x80000000UL;
    }
  else
    {
      char * symbol;
 
      /* Create .idata$6 - the Hint Name Table.  */
      id6 = pe_ILF_make_a_section (& vars, ".idata$6", SIZEOF_IDATA6, 0);
      if (id6 == NULL)
	return false;
 
      /* If necessary, trim the import symbol name.  */
      symbol = symbol_name;
 
      if (import_name_type != IMPORT_NAME)
	/* Skip any prefix in symbol_name.  */
	while (*symbol == '@' || * symbol == '?' || * symbol == '_')
	  ++ symbol;
 
      if (import_name_type == IMPORT_NAME_UNDECORATE)
	{
	  /* Truncate at the first '@'  */
	  while (* symbol != 0 && * symbol != '@')
	    symbol ++;
 
	  * symbol = 0;
	}
 
      id6->contents[0] = ordinal & 0xff;
      id6->contents[1] = ordinal >> 8;
 
      strcpy (id6->contents + 2, symbol);
    }
 
  if (import_name_type != IMPORT_ORDINAL)
    {
      pe_ILF_make_a_reloc (& vars, 0, BFD_RELOC_RVA, id6);
      pe_ILF_save_relocs (& vars, id4);
 
      pe_ILF_make_a_reloc (& vars, 0, BFD_RELOC_RVA, id6);
      pe_ILF_save_relocs (& vars, id5);
    }
 
  /* Create extra sections depending upon the type of import we are dealing with.  */
  switch (import_type)
    {
      int i;
 
    case IMPORT_CODE:
      /* Create a .text section.
	 First we need to look up its contents in the jump table.  */
      for (i = NUM_ENTRIES (jtab); i--;)
	{
	  if (jtab[i].size == 0)
	    continue;
	  if (jtab[i].magic == magic)
	    break;
	}
      /* If we did not find a matching entry something is wrong.  */
      if (i < 0)
	abort ();
 
      /* Create the .text section.  */
      text = pe_ILF_make_a_section (& vars, ".text", jtab[i].size, SEC_CODE);
      if (text == NULL)
	return false;
 
      /* Copy in the jump code.  */
      memcpy (text->contents, jtab[i].data, jtab[i].size);
 
      /* Create an import symbol.  */
      pe_ILF_make_a_symbol (& vars, "__imp_", symbol_name, id5, 0);
      imp_sym   = vars.sym_ptr_ptr - 1;
      imp_index = vars.sym_index - 1;
 
      /* Create a reloc for the data in the text section.  */
#ifdef MIPS_ARCH_MAGIC_WINCE      
      if (magic == MIPS_ARCH_MAGIC_WINCE)
	{
	  pe_ILF_make_a_symbol_reloc (& vars, 0, BFD_RELOC_HI16_S,
				      (asection **) imp_sym, imp_index);
	  pe_ILF_make_a_reloc (& vars, 0, BFD_RELOC_LO16, text);
	  pe_ILF_make_a_symbol_reloc (& vars, 4, BFD_RELOC_LO16,
				      (asection **) imp_sym, imp_index);
	}
      else
#endif
	pe_ILF_make_a_symbol_reloc (& vars, jtab[i].offset, BFD_RELOC_32,
				    (asymbol **) imp_sym, imp_index);
 
      pe_ILF_save_relocs (& vars, text);
      break;
 
    case IMPORT_DATA:
      break;
 
    default:
      /* XXX code not yet written.  */
      abort ();
    }
 
  /* Initialise the bfd.  */
  memset (& internal_f, 0, sizeof (internal_f));
 
  internal_f.f_magic  = magic;
  internal_f.f_symptr = 0;
  internal_f.f_nsyms  = 0;
  internal_f.f_flags  = F_AR32WR | F_LNNO; /* XXX is this correct ?  */
 
  if (   ! bfd_set_start_address (abfd, 0)
      || ! bfd_coff_set_arch_mach_hook (abfd, & internal_f))
    return false;
 
  if (bfd_coff_mkobject_hook (abfd, (PTR) & internal_f, NULL) == NULL)
    return false;
 
  coff_data (abfd)->pe = 1;
#ifdef THUMBPEMAGIC  
  if (vars.magic == THUMBPEMAGIC)
    /* Stop some linker warnings about thumb code not supporting interworking.  */
    coff_data (abfd)->flags |= F_INTERWORK | F_INTERWORK_SET;
#endif
 
  /* Switch from file contents to memory contents.  */
  bfd_cache_close (abfd);
 
  abfd->iostream = (PTR) vars.bim;
  abfd->flags |= BFD_IN_MEMORY /* | HAS_LOCALS */;
  abfd->where = 0;
  obj_sym_filepos (abfd) = 0;
 
  /* Now create a symbol describing the imported value.  */
  switch (import_type)
    {
      bfd_byte * ptr;
 
    case IMPORT_CODE:
      pe_ILF_make_a_symbol (& vars, "", symbol_name, text,
			    BSF_NOT_AT_END | BSF_FUNCTION);
 
      /* Create an import symbol for the DLL, without the
       .dll suffix.  */
      ptr = strrchr (source_dll, '.');
      if (ptr)
	* ptr = 0;
      pe_ILF_make_a_symbol (& vars, "__IMPORT_DESCRIPTOR_", source_dll, NULL, 0);
      if (ptr)
	* ptr = '.';
      break;
 
    case IMPORT_DATA:
      /* Nothing to do here.  */
      break;
 
    default:
      /* XXX code not yet written.  */
      abort ();
    }
 
  /* Point the bfd at the symbol table.  */
  obj_symbols (abfd) = vars.sym_cache;
  bfd_get_symcount (abfd) = vars.sym_index;
 
  obj_raw_syments (abfd) = vars.native_syms;
  obj_raw_syment_count (abfd) = vars.sym_index;
 
  obj_coff_external_syms (abfd) = (PTR) vars.esym_table;
  obj_coff_keep_syms (abfd) = true;
 
  obj_convert (abfd) = vars.sym_table;
  obj_conv_table_size (abfd) = vars.sym_index;
 
  obj_coff_strings (abfd) = vars.string_table;
  obj_coff_keep_strings (abfd) = true;
 
  abfd->flags |= HAS_SYMS;
 
  return true;
}
 
/* We have detected a Image Library Format archive element.
   Decode the element and return the appropriate target.  */
static const bfd_target *
pe_ILF_object_p (bfd * abfd)
{
  bfd_byte        buffer[16];
  bfd_byte *      ptr;
  bfd_byte *      symbol_name;
  bfd_byte *      source_dll;
  unsigned int    machine;
  unsigned long   size;
  unsigned int    ordinal;
  unsigned int    types;
  unsigned short  magic;
 
  /* Upon entry the first four buyes of the ILF header have
      already been read.  Now read the rest of the header.  */
  if (bfd_read (buffer, 1, 16, abfd) != 16)
    return NULL;
 
  ptr = buffer;
 
  /*  We do not bother to check the version number.
      version = bfd_h_get_16 (abfd, ptr);  */
  ptr += 2;
 
  machine = bfd_h_get_16 (abfd, ptr);
  ptr += 2;
 
  /* Check that the machine type is recognised.  */
  magic = 0;
 
  switch (machine)
    {
    case IMAGE_FILE_MACHINE_UNKNOWN:
    case IMAGE_FILE_MACHINE_ALPHA:
    case IMAGE_FILE_MACHINE_ALPHA64:
    case IMAGE_FILE_MACHINE_IA64:
      break;
 
    case IMAGE_FILE_MACHINE_I386:
#ifdef I386MAGIC
      magic = I386MAGIC;
#endif
      break;
 
    case IMAGE_FILE_MACHINE_M68K:
#ifdef MC68AGIC
      magic = MC68MAGIC;
#endif
      break;
 
    case IMAGE_FILE_MACHINE_R3000:
    case IMAGE_FILE_MACHINE_R4000:
    case IMAGE_FILE_MACHINE_R10000:
 
    case IMAGE_FILE_MACHINE_MIPS16:
    case IMAGE_FILE_MACHINE_MIPSFPU:
    case IMAGE_FILE_MACHINE_MIPSFPU16:
#ifdef MIPS_ARCH_MAGIC_WINCE
      magic = MIPS_ARCH_MAGIC_WINCE;
#endif
      break;
 
    case IMAGE_FILE_MACHINE_SH3:
    case IMAGE_FILE_MACHINE_SH4:
#ifdef SH_ARCH_MAGIC_WINCE
      magic = SH_ARCH_MAGIC_WINCE;
#endif
      break;
 
    case IMAGE_FILE_MACHINE_ARM:
#ifdef ARMPEMAGIC
      magic = ARMPEMAGIC;
#endif      
      break;
 
    case IMAGE_FILE_MACHINE_THUMB:
#ifdef THUMBPEMAGIC
      {
	extern bfd_target armpei_little_vec;
 
	if (abfd->xvec == & armpei_little_vec)
	  magic = THUMBPEMAGIC;
      }
#endif      
      break;
 
    case IMAGE_FILE_MACHINE_POWERPC:
      /* We no longer support PowerPC.  */
    default:
      _bfd_error_handler
	(
_("%s: Unrecognised machine type (0x%x) in Import Library Format archive"),
         bfd_get_filename (abfd), machine);
      bfd_set_error (bfd_error_malformed_archive);
 
      return NULL;
      break;
    }
 
  if (magic == 0)
    {
      _bfd_error_handler
	(
_("%s: Recognised but unhandled machine type (0x%x) in Import Library Format archive"),
	 bfd_get_filename (abfd), machine);
      bfd_set_error (bfd_error_wrong_format);
 
      return NULL;
    }  
 
  /* We do not bother to check the date.
     date = bfd_h_get_32 (abfd, ptr);  */
  ptr += 4;
 
  size = bfd_h_get_32 (abfd, ptr);
  ptr += 4;
 
  if (size == 0)
    {
      _bfd_error_handler
	(_("%s: size field is zero in Import Library Format header"),
	 bfd_get_filename (abfd));
      bfd_set_error (bfd_error_malformed_archive);
 
      return NULL;
    }
 
  ordinal = bfd_h_get_16 (abfd, ptr);
  ptr += 2;
 
  types = bfd_h_get_16 (abfd, ptr);
  /* ptr += 2; */
 
  /* Now read in the two strings that follow.  */
  ptr = bfd_alloc (abfd, size);
  if (ptr == NULL)
    return NULL;
 
  if (bfd_read (ptr, 1, size, abfd) != size)
    return NULL;
 
  symbol_name = ptr;
  source_dll  = ptr + strlen (ptr) + 1;
 
  /* Verify that the strings are null terminated.  */
  if (ptr[size - 1] != 0 || ((unsigned long) (source_dll - ptr) >= size))
    {
      _bfd_error_handler
	(_("%s: string not null terminated in ILF object file."),
	 bfd_get_filename (abfd));
      bfd_set_error (bfd_error_malformed_archive);
 
      return NULL;
    }
 
  /* Now construct the bfd.  */
  if (! pe_ILF_build_a_bfd (abfd, magic, symbol_name,
			    source_dll, ordinal, types))
    return NULL;
 
  return abfd->xvec;
}
 
static const bfd_target *
pe_bfd_object_p (bfd * abfd)
{
  /* We need to handle a PE image correctly.  In PE images created by
     the GNU linker, the offset to the COFF header is always the size.
     However, this is not the case in images generated by other PE
     linkers.  The PE format stores a four byte offset to the PE
     signature just before the COFF header at location 0x3c of the file.
     We pick up that offset, verify that the PE signature is there, and
     then set ourselves up to read in the COFF header.  */
  bfd_byte buffer[4];
  file_ptr offset;
  unsigned long signature;
 
  /* Detect if this a Microsoft Import Library Format element.  */
  if (bfd_seek (abfd, 0x00, SEEK_SET) != 0
      || bfd_read (buffer, 1, 4, abfd) != 4)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
 
  signature = bfd_h_get_32 (abfd, buffer);
 
  if (signature == 0xffff0000)
    return pe_ILF_object_p (abfd);
 
  if (bfd_seek (abfd, 0x3c, SEEK_SET) != 0
      || bfd_read (buffer, 1, 4, abfd) != 4)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
 
  offset = bfd_h_get_32 (abfd, buffer);
 
  if (bfd_seek (abfd, offset, SEEK_SET) != 0
      || bfd_read (buffer, 1, 4, abfd) != 4)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
 
  signature = bfd_h_get_32 (abfd, buffer);
 
  if (signature != 0x4550)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
 
  /* Here is the hack.  coff_object_p wants to read filhsz bytes to
     pick up the COFF header.  We adjust so that that will work.  20
     is the size of the i386 COFF filehdr.  */
  if (bfd_seek (abfd,
		(bfd_tell (abfd)
		 - bfd_coff_filhsz (abfd)
		 + 20),
		SEEK_SET)
      != 0)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
 
  return coff_object_p (abfd);
}
 
#define coff_object_p pe_bfd_object_p
#endif /* COFF_IMAGE_WITH_PE */
 

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