/* Support for 64-bit archives.

   Copyright (C) 1996-2026 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 archives.  We use the same format as

   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.  */

/* Read an Irix 6 armap.  */

bool

_bfd_archive_64_bit_slurp_armap (bfd *abfd)

{

  struct artdata *ardata = bfd_ardata (abfd);

  char nextname[17];

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

  struct areltdata *mapdata;

  bfd_byte int_buf[8];

  char *stringbase;

  char *stringend;

  bfd_byte *raw_armap = NULL;

  carsym *carsyms;

  bfd_size_type amt;

  ufile_ptr filesize;

  BFD_ASSERT (!bfd_is_fake_archive (abfd));

  ardata->symdefs = NULL;

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

  i = bfd_read (nextname, 16, abfd);

  if (i == 0)

    return true;

  if (i != 16)

    return false;

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

    return false;

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

  if (startswith (nextname, "/               "))

    return bfd_slurp_armap (abfd);

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

    {

      abfd->has_armap = false;

      return true;

    }

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

  if (mapdata == NULL)

    return false;

  parsed_size = mapdata->parsed_size;

  free (mapdata);

  filesize = bfd_get_file_size (abfd);

  if (filesize != 0 && parsed_size > filesize)

    {

      bfd_set_error (bfd_error_malformed_archive);

      return false;

    }

  if (bfd_read (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;

  if (/* Catch overflow in stringsize (and ptrsize) expression.  */

      nsymz >= (bfd_size_type) -1 / 8

      || stringsize > parsed_size

      /* Catch overflow in carsym_size expression.  */

      || nsymz > (bfd_size_type) -1 / sizeof (carsym)

      /* Catch overflow in amt expression.  */

      || amt <= carsym_size

      || amt <= stringsize)

    {

      bfd_set_error (bfd_error_malformed_archive);

      return false;

    }

  ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);

  if (ardata->symdefs == NULL)

    return false;

  carsyms = ardata->symdefs;

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

  raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize);

  if (raw_armap == NULL

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

    {

      if (bfd_get_error () != bfd_error_system_call)

  bfd_set_error (bfd_error_malformed_archive);

      goto release_symdefs;

    }

  stringend = stringbase + stringsize;

  *stringend = 0;

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

    {

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

      carsyms->name = stringbase;

      stringbase += strlen (stringbase);

      if (stringbase != stringend)

  ++stringbase;

      ++carsyms;

    }

  ardata->symdef_count = nsymz;

  ardata->first_file.file_offset = bfd_tell (abfd);

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

  ardata->first_file.file_offset += (ardata->first_file.file_offset) % 2;

  abfd->has_armap = true;

  bfd_release (abfd, raw_armap);

  return true;

 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.  */

bool

_bfd_archive_64_bit_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/"));

  if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))

    return false;

  time_t date;

  if (arch->flags & BFD_DETERMINISTIC_OUTPUT)

    date = 0;

  else

    date = bfd_get_current_time (0);

  _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", (long) date);

  /* 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_write (&hdr, sizeof (struct ar_hdr), arch)

      != sizeof (struct ar_hdr))

    return false;

  bfd_putb64 ((bfd_vma) symbol_count, buf);

  if (bfd_write (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.  */

  count = 0;

  for (current = arch->archive_head;

       current != NULL && count < symbol_count;

       current = current->archive_next)

    {

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

   the object file's address in the archive.  */

      for (;

     count < symbol_count && map[count].abfd == current;

     count++)

  {

    bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);

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

      return false;

  }

      /* Add size of this archive entry */

      archive_member_file_ptr += sizeof (struct ar_hdr);

      if (! bfd_is_thin_archive (arch))

  archive_member_file_ptr += arelt_size (current);

      /* remember about the even alignment */

      archive_member_file_ptr += archive_member_file_ptr % 2;

    }

  /* now write the strings themselves */

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

    {

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

      if (bfd_write (*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_write ("", 1, arch) != 1)

  return false;

      --padding;

    }

  return true;

}