bfd/archive64.c

   1 /* Support for 64-bit ELF archives.
   2    Copyright (C) 1996-2014 Free Software Foundation, Inc.
   3    Ian Lance Taylor, Cygnus Support
   4    Linker support added by Mark Mitchell, CodeSourcery, LLC.
   5    <mark@codesourcery.com>
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 /* This file supports the 64-bit (MIPS) ELF archives.  */
  25
  26 #include "sysdep.h"
  27 #include "bfd.h"
  28 #include "libbfd.h"
  29 #include "aout/ar.h"
  30
  31 /* Irix 6 defines a 64bit archive map format, so that they can
  32    have archives more than 4 GB in size.  */
  33
  34 bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
  35 bfd_boolean bfd_elf64_archive_write_armap
  36   (bfd *, unsigned int, struct orl *, unsigned int, int);
  37
  38 /* Read an Irix 6 armap.  */
  39
  40 bfd_boolean
  41 bfd_elf64_archive_slurp_armap (bfd *abfd)
  42 {
  43   struct artdata *ardata = bfd_ardata (abfd);
  44   char nextname[17];
  45   bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
  46   struct areltdata *mapdata;
  47   bfd_byte int_buf[8];
  48   char *stringbase;
  49   bfd_byte *raw_armap = NULL;
  50   carsym *carsyms;
  51   bfd_size_type amt;
  52
  53   ardata->symdefs = NULL;
  54
  55   /* Get the name of the first element.  */
  56   i = bfd_bread (nextname, 16, abfd);
  57   if (i == 0)
  58     return TRUE;
  59   if (i != 16)
  60     return FALSE;
  61
  62   if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
  63     return FALSE;
  64
  65   /* Archives with traditional armaps are still permitted.  */
  66   if (CONST_STRNEQ (nextname, "/               "))
  67     return bfd_slurp_armap (abfd);
  68
  69   if (! CONST_STRNEQ (nextname, "/SYM64/         "))
  70     {
  71       bfd_has_map (abfd) = FALSE;
  72       return TRUE;
  73     }
  74
  75   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
  76   if (mapdata == NULL)
  77     return FALSE;
  78   parsed_size = mapdata->parsed_size;
  79   free (mapdata);
  80
  81   if (bfd_bread (int_buf, 8, abfd) != 8)
  82     {
  83       if (bfd_get_error () != bfd_error_system_call)
  84         bfd_set_error (bfd_error_malformed_archive);
  85       return FALSE;
  86     }
  87
  88   nsymz = bfd_getb64 (int_buf);
  89   stringsize = parsed_size - 8 * nsymz - 8;
  90
  91   carsym_size = nsymz * sizeof (carsym);
  92   ptrsize = 8 * nsymz;
  93
  94   amt = carsym_size + stringsize + 1;
  95   ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt);
  96   if (ardata->symdefs == NULL)
  97     return FALSE;
  98   carsyms = ardata->symdefs;
  99   stringbase = ((char *) ardata->symdefs) + carsym_size;
 100
 101   raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize);
 102   if (raw_armap == NULL)
 103     goto release_symdefs;
 104
 105   if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
 106       || bfd_bread (stringbase, stringsize, abfd) != stringsize)
 107     {
 108       if (bfd_get_error () != bfd_error_system_call)
 109         bfd_set_error (bfd_error_malformed_archive);
 110       goto release_raw_armap;
 111     }
 112
 113   for (i = 0; i < nsymz; i++)
 114     {
 115       carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
 116       carsyms->name = stringbase;
 117       stringbase += strlen (stringbase) + 1;
 118       ++carsyms;
 119     }
 120   *stringbase = '\0';
 121
 122   ardata->symdef_count = nsymz;
 123   ardata->first_file_filepos = bfd_tell (abfd);
 124   /* Pad to an even boundary if you have to.  */
 125   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
 126
 127   bfd_has_map (abfd) = TRUE;
 128   bfd_release (abfd, raw_armap);
 129
 130   return TRUE;
 131
 132 release_raw_armap:
 133   bfd_release (abfd, raw_armap);
 134 release_symdefs:
 135   bfd_release (abfd, ardata->symdefs);
 136   return FALSE;
 137 }
 138
 139 /* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
 140    able to handle ordinary ELF armaps, but at least on Irix 6.2 the
 141    linker crashes.  */
 142
 143 bfd_boolean
 144 bfd_elf64_archive_write_armap (bfd *arch,
 145                                unsigned int elength,
 146                                struct orl *map,
 147                                unsigned int symbol_count,
 148                                int stridx)
 149 {
 150   unsigned int ranlibsize = (symbol_count * 8) + 8;
 151   unsigned int stringsize = stridx;
 152   unsigned int mapsize = stringsize + ranlibsize;
 153   file_ptr archive_member_file_ptr;
 154   bfd *current = arch->archive_head;
 155   unsigned int count;
 156   struct ar_hdr hdr;
 157   int padding;
 158   bfd_byte buf[8];
 159
 160   padding = BFD_ALIGN (mapsize, 8) - mapsize;
 161   mapsize += padding;
 162
 163   /* work out where the first object file will go in the archive */
 164   archive_member_file_ptr = (mapsize
 165                              + elength
 166                              + sizeof (struct ar_hdr)
 167                              + SARMAG);
 168
 169   memset (&hdr, ' ', sizeof (struct ar_hdr));
 170   memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
 171   if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
 172     return FALSE;
 173   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
 174                     time (NULL));
 175   /* This, at least, is what Intel coff sets the values to.: */
 176   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
 177   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
 178   _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
 179   memcpy (hdr.ar_fmag, ARFMAG, 2);
 180
 181   /* Write the ar header for this item and the number of symbols */
 182
 183   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
 184       != sizeof (struct ar_hdr))
 185     return FALSE;
 186
 187   bfd_putb64 ((bfd_vma) symbol_count, buf);
 188   if (bfd_bwrite (buf, 8, arch) != 8)
 189     return FALSE;
 190
 191   /* Two passes, first write the file offsets for each symbol -
 192      remembering that each offset is on a two byte boundary.  */
 193
 194   /* Write out the file offset for the file associated with each
 195      symbol, and remember to keep the offsets padded out.  */
 196   count = 0;
 197   for (current = arch->archive_head;
 198        current != NULL && count < symbol_count;
 199        current = current->archive_next)
 200     {
 201       /* For each symbol which is used defined in this object, write out
 202          the object file's address in the archive.  */
 203
 204       for (;
 205            count < symbol_count && map[count].u.abfd == current;
 206            count++)
 207         {
 208           bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
 209           if (bfd_bwrite (buf, 8, arch) != 8)
 210             return FALSE;
 211         }
 212
 213       /* Add size of this archive entry */
 214       archive_member_file_ptr += sizeof (struct ar_hdr);
 215       if (! bfd_is_thin_archive (arch))
 216         archive_member_file_ptr += arelt_size (current);
 217       /* remember about the even alignment */
 218       archive_member_file_ptr += archive_member_file_ptr % 2;
 219     }
 220
 221   /* now write the strings themselves */
 222   for (count = 0; count < symbol_count; count++)
 223     {
 224       size_t len = strlen (*map[count].name) + 1;
 225
 226       if (bfd_bwrite (*map[count].name, len, arch) != len)
 227         return FALSE;
 228     }
 229
 230   /* The spec says that this should be padded to an 8 byte boundary.
 231      However, the Irix 6.2 tools do not appear to do this.  */
 232   while (padding != 0)
 233     {
 234       if (bfd_bwrite ("", 1, arch) != 1)
 235         return FALSE;
 236       --padding;
 237     }
 238
 239   return TRUE;
 240 }