Subversion Repositories or1k

/* Support for the generic parts of PE/PEI, for BFD.

   Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002

   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 int, 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 = H_GET_32 (abfd, reloc_src->r_vaddr);

  reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);

  reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);

#ifdef SWAP_IN_RELOC_OFFSET

  reloc_dst->r_offset = SWAP_IN_RELOC_OFFSET (abfd, 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;

  H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);

  H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);

  H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);

#ifdef SWAP_OUT_RELOC_OFFSET

  SWAP_OUT_RELOC_OFFSET (abfd, reloc_src->r_offset, 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 = H_GET_16 (abfd, filehdr_src->f_magic);

  filehdr_dst->f_nscns = H_GET_16 (abfd, filehdr_src-> f_nscns);

  filehdr_dst->f_timdat = H_GET_32 (abfd, filehdr_src-> f_timdat);

  filehdr_dst->f_nsyms = H_GET_32 (abfd, filehdr_src-> f_nsyms);

  filehdr_dst->f_flags = H_GET_16 (abfd, filehdr_src-> f_flags);

  filehdr_dst->f_symptr = H_GET_32 (abfd, filehdr_src->f_symptr);

  /* 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 = H_GET_16 (abfd, filehdr_src-> f_opthdr);

}

#ifdef COFF_IMAGE_WITH_PE

# define coff_swap_filehdr_out _bfd_XXi_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, scnhdr_ext->s_vaddr);

  scnhdr_int->s_paddr = GET_SCNHDR_PADDR (abfd, scnhdr_ext->s_paddr);

  scnhdr_int->s_size = GET_SCNHDR_SIZE (abfd, scnhdr_ext->s_size);

  scnhdr_int->s_scnptr = GET_SCNHDR_SCNPTR (abfd, scnhdr_ext->s_scnptr);

  scnhdr_int->s_relptr = GET_SCNHDR_RELPTR (abfd, scnhdr_ext->s_relptr);

  scnhdr_int->s_lnnoptr = GET_SCNHDR_LNNOPTR (abfd, scnhdr_ext->s_lnnoptr);

  scnhdr_int->s_flags = H_GET_32 (abfd, 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 = (H_GET_16 (abfd, scnhdr_ext->s_nlnno)

                         + (H_GET_16 (abfd, scnhdr_ext->s_nreloc) << 16));

  scnhdr_int->s_nreloc = 0;

#else

  scnhdr_int->s_nreloc = H_GET_16 (abfd, scnhdr_ext->s_nreloc);

  scnhdr_int->s_nlnno = H_GET_16 (abfd, 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_paddr > 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;

  bfd_size_type amt = sizeof (pe_data_type);

  abfd->tdata.pe_obj_data = (struct pe_tdata *) bfd_zalloc (abfd, amt);

  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;

#ifdef PEI_FORCE_MINIMUM_ALIGNMENT

  pe->force_minimum_alignment = 1;

#endif

#ifdef PEI_TARGET_SUBSYSTEM

  pe->target_subsystem = PEI_TARGET_SUBSYSTEM;

#endif

  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))

    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_XX_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_XX_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_XX_bfd_copy_private_section_data

#define coff_get_symbol_info _bfd_XX_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.  */

  H_PUT_32 (vars->abfd, vars->string_ptr - vars->string_table,

            esym->e.e.e_offset);

  H_PUT_16 (vars->abfd, section->target_index, 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, (bfd_size_type) 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