Subversion Repositories openrisc_2011-10-31

/* MIPS-specific support for 64-bit ELF

   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2007

   Free Software Foundation, Inc.

   Ian Lance Taylor, Cygnus Support

   Linker support added by Mark Mitchell, CodeSourcery, LLC.

   <mark@codesourcery.com>

   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 3 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.  */

/* This file supports the 64-bit (MIPS) ELF archives.  */

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

#include "aout/ar.h"

/* Irix 6 defines a 64bit archive map format, so that they can

   have archives more than 4 GB in size.  */

bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);

bfd_boolean bfd_elf64_archive_write_armap

  (bfd *, unsigned int, struct orl *, unsigned int, int);

/* Read an Irix 6 armap.  */

bfd_boolean

bfd_elf64_archive_slurp_armap (bfd *abfd)

{

  struct artdata *ardata = bfd_ardata (abfd);

  char nextname[17];

  file_ptr arhdrpos;

  bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;

  struct areltdata *mapdata;

  bfd_byte int_buf[8];

  char *stringbase;

  bfd_byte *raw_armap = NULL;

  carsym *carsyms;

  bfd_size_type amt;

  ardata->symdefs = NULL;

  /* Get the name of the first element.  */

  arhdrpos = bfd_tell (abfd);

  i = bfd_bread (nextname, 16, abfd);

  if (i == 0)

    return TRUE;

  if (i != 16)

    return FALSE;

  if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)

    return FALSE;

  /* Archives with traditional armaps are still permitted.  */

  if (CONST_STRNEQ (nextname, "/               "))

    return bfd_slurp_armap (abfd);

  if (! CONST_STRNEQ (nextname, "/SYM64/         "))

    {

      bfd_has_map (abfd) = FALSE;

      return TRUE;

    }

  mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);

  if (mapdata == NULL)

    return FALSE;

  parsed_size = mapdata->parsed_size;

  bfd_release (abfd, mapdata);

  if (bfd_bread (int_buf, 8, abfd) != 8)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_malformed_archive);

      return FALSE;

    }

  nsymz = bfd_getb64 (int_buf);

  stringsize = parsed_size - 8 * nsymz - 8;

  carsym_size = nsymz * sizeof (carsym);

  ptrsize = 8 * nsymz;

  amt = carsym_size + stringsize + 1;

  ardata->symdefs = bfd_zalloc (abfd, amt);

  if (ardata->symdefs == NULL)

    return FALSE;

  carsyms = ardata->symdefs;

  stringbase = ((char *) ardata->symdefs) + carsym_size;

  raw_armap = bfd_alloc (abfd, ptrsize);

  if (raw_armap == NULL)

    goto release_symdefs;

  if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize

      || bfd_bread (stringbase, stringsize, abfd) != stringsize)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_malformed_archive);

      goto release_raw_armap;

    }

  for (i = 0; i < nsymz; i++)

    {

      carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);

      carsyms->name = stringbase;

      stringbase += strlen (stringbase) + 1;

      ++carsyms;

    }

  *stringbase = '\0';

  ardata->symdef_count = nsymz;

  ardata->first_file_filepos = bfd_tell (abfd);

  /* Pad to an even boundary if you have to.  */

  ardata->first_file_filepos += (ardata->first_file_filepos) % 2;

  bfd_has_map (abfd) = TRUE;

  bfd_release (abfd, raw_armap);

  return TRUE;

release_raw_armap:

  bfd_release (abfd, raw_armap);

release_symdefs:

  bfd_release (abfd, ardata->symdefs);

  return FALSE;

}

/* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be

   able to handle ordinary ELF armaps, but at least on Irix 6.2 the

   linker crashes.  */

bfd_boolean

bfd_elf64_archive_write_armap (bfd *arch,

                               unsigned int elength,

                               struct orl *map,

                               unsigned int symbol_count,

                               int stridx)

{

  unsigned int ranlibsize = (symbol_count * 8) + 8;

  unsigned int stringsize = stridx;

  unsigned int mapsize = stringsize + ranlibsize;

  file_ptr archive_member_file_ptr;

  bfd *current = arch->archive_head;

  unsigned int count;

  struct ar_hdr hdr;

  int padding;

  bfd_byte buf[8];

  padding = BFD_ALIGN (mapsize, 8) - mapsize;

  mapsize += padding;

  /* work out where the first object file will go in the archive */

  archive_member_file_ptr = (mapsize

                             + elength

                             + sizeof (struct ar_hdr)

                             + SARMAG);

  memset (&hdr, ' ', sizeof (struct ar_hdr));

  memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));

  _bfd_ar_spacepad (hdr.ar_size, sizeof (hdr.ar_size), "%-10ld",

                    mapsize);

  _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",

                    time (NULL));

  /* This, at least, is what Intel coff sets the values to.: */

  _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);

  _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);

  _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);

  memcpy (hdr.ar_fmag, ARFMAG, 2);

  /* Write the ar header for this item and the number of symbols */

  if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)

      != sizeof (struct ar_hdr))

    return FALSE;

  bfd_putb64 ((bfd_vma) symbol_count, buf);

  if (bfd_bwrite (buf, 8, arch) != 8)

    return FALSE;

  /* Two passes, first write the file offsets for each symbol -

     remembering that each offset is on a two byte boundary.  */

  /* Write out the file offset for the file associated with each

     symbol, and remember to keep the offsets padded out.  */

  current = arch->archive_head;

  count = 0;

  while (current != NULL && count < symbol_count)

    {

      /* For each symbol which is used defined in this object, write out

         the object file's address in the archive */

      while (map[count].u.abfd == current)

        {

          bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);

          if (bfd_bwrite (buf, 8, arch) != 8)

            return FALSE;

          count++;

        }

      /* Add size of this archive entry */

      archive_member_file_ptr += (arelt_size (current)

                                  + sizeof (struct ar_hdr));

      /* remember about the even alignment */

      archive_member_file_ptr += archive_member_file_ptr % 2;

      current = current->archive_next;

    }

  /* now write the strings themselves */

  for (count = 0; count < symbol_count; count++)

    {

      size_t len = strlen (*map[count].name) + 1;

      if (bfd_bwrite (*map[count].name, len, arch) != len)

        return FALSE;

    }

  /* The spec says that this should be padded to an 8 byte boundary.

     However, the Irix 6.2 tools do not appear to do this.  */

  while (padding != 0)

    {

      if (bfd_bwrite ("", 1, arch) != 1)

        return FALSE;

      --padding;

    }

  return TRUE;

}