bfd/archive64.c

   1 /* MIPS-specific support for 64-bit ELF
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007,
   3    2010  Free Software Foundation, Inc.
   4    Ian Lance Taylor, Cygnus Support
   5    Linker support added by Mark Mitchell, CodeSourcery, LLC.
   6    <mark@codesourcery.com>
   7
   8    This file is part of BFD, the Binary File Descriptor library.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  23    MA 02110-1301, USA.  */
  24
  25 /* This file supports the 64-bit (MIPS) ELF archives.  */
  26
  27 #include "sysdep.h"
  28 #include "bfd.h"
  29 #include "libbfd.h"
  30 #include "aout/ar.h"
  31
  32 /* Irix 6 defines a 64bit archive map format, so that they can
  33    have archives more than 4 GB in size.  */
  34
  35 bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
  36 bfd_boolean bfd_elf64_archive_write_armap
  37   (bfd *, unsigned int, struct orl *, unsigned int, int);
  38
  39 /* Read an Irix 6 armap.  */
  40
  41 bfd_boolean
  42 bfd_elf64_archive_slurp_armap (bfd *abfd)
  43 {
  44   struct artdata *ardata = bfd_ardata (abfd);
  45   char nextname[17];
  46   bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
  47   struct areltdata *mapdata;
  48   bfd_byte int_buf[8];
  49   char *stringbase;
  50   bfd_byte *raw_armap = NULL;
  51   carsym *carsyms;
  52   bfd_size_type amt;
  53
  54   ardata->symdefs = NULL;
  55
  56   /* Get the name of the first element.  */
  57   i = bfd_bread (nextname, 16, abfd);
  58   if (i == 0)
  59     return TRUE;
  60   if (i != 16)
  61     return FALSE;
  62
  63   if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
  64     return FALSE;
  65
  66   /* Archives with traditional armaps are still permitted.  */
  67   if (CONST_STRNEQ (nextname, "/               "))
  68     return bfd_slurp_armap (abfd);
  69
  70   if (! CONST_STRNEQ (nextname, "/SYM64/         "))
  71     {
  72       bfd_has_map (abfd) = FALSE;
  73       return TRUE;
  74     }
  75
  76   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
  77   if (mapdata == NULL)
  78     return FALSE;
  79   parsed_size = mapdata->parsed_size;
  80   bfd_release (abfd, mapdata);
  81
  82   if (bfd_bread (int_buf, 8, abfd) != 8)
  83     {
  84       if (bfd_get_error () != bfd_error_system_call)
  85         bfd_set_error (bfd_error_malformed_archive);
  86       return FALSE;
  87     }
  88
  89   nsymz = bfd_getb64 (int_buf);
  90   stringsize = parsed_size - 8 * nsymz - 8;
  91
  92   carsym_size = nsymz * sizeof (carsym);
  93   ptrsize = 8 * nsymz;
  94
  95   amt = carsym_size + stringsize + 1;
  96   ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt);
  97   if (ardata->symdefs == NULL)
  98     return FALSE;
  99   carsyms = ardata->symdefs;
 100   stringbase = ((char *) ardata->symdefs) + carsym_size;
 101
 102   raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize);
 103   if (raw_armap == NULL)
 104     goto release_symdefs;
 105
 106   if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
 107       || bfd_bread (stringbase, stringsize, abfd) != stringsize)
 108     {
 109       if (bfd_get_error () != bfd_error_system_call)
 110         bfd_set_error (bfd_error_malformed_archive);
 111       goto release_raw_armap;
 112     }
 113
 114   for (i = 0; i < nsymz; i++)
 115     {
 116       carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
 117       carsyms->name = stringbase;
 118       stringbase += strlen (stringbase) + 1;
 119       ++carsyms;
 120     }
 121   *stringbase = '\0';
 122
 123   ardata->symdef_count = nsymz;
 124   ardata->first_file_filepos = bfd_tell (abfd);
 125   /* Pad to an even boundary if you have to.  */
 126   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
 127
 128   bfd_has_map (abfd) = TRUE;
 129   bfd_release (abfd, raw_armap);
 130
 131   return TRUE;
 132
 133 release_raw_armap:
 134   bfd_release (abfd, raw_armap);
 135 release_symdefs:
 136   bfd_release (abfd, ardata->symdefs);
 137   return FALSE;
 138 }
 139
 140 /* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
 141    able to handle ordinary ELF armaps, but at least on Irix 6.2 the
 142    linker crashes.  */
 143
 144 bfd_boolean
 145 bfd_elf64_archive_write_armap (bfd *arch,
 146                                unsigned int elength,
 147                                struct orl *map,
 148                                unsigned int symbol_count,
 149                                int stridx)
 150 {
 151   unsigned int ranlibsize = (symbol_count * 8) + 8;
 152   unsigned int stringsize = stridx;
 153   unsigned int mapsize = stringsize + ranlibsize;
 154   file_ptr archive_member_file_ptr;
 155   bfd *current = arch->archive_head;
 156   unsigned int count;
 157   struct ar_hdr hdr;
 158   int padding;
 159   bfd_byte buf[8];
 160
 161   padding = BFD_ALIGN (mapsize, 8) - mapsize;
 162   mapsize += padding;
 163
 164   /* work out where the first object file will go in the archive */
 165   archive_member_file_ptr = (mapsize
 166                              + elength
 167                              + sizeof (struct ar_hdr)
 168                              + SARMAG);
 169
 170   memset (&hdr, ' ', sizeof (struct ar_hdr));
 171   memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
 172   _bfd_ar_spacepad (hdr.ar_size, sizeof (hdr.ar_size), "%-10ld",
 173                     mapsize);
 174   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
 175                     time (NULL));
 176   /* This, at least, is what Intel coff sets the values to.: */
 177   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
 178   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
 179   _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
 180   memcpy (hdr.ar_fmag, ARFMAG, 2);
 181
 182   /* Write the ar header for this item and the number of symbols */
 183
 184   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
 185       != sizeof (struct ar_hdr))
 186     return FALSE;
 187
 188   bfd_putb64 ((bfd_vma) symbol_count, buf);
 189   if (bfd_bwrite (buf, 8, arch) != 8)
 190     return FALSE;
 191
 192   /* Two passes, first write the file offsets for each symbol -
 193      remembering that each offset is on a two byte boundary.  */
 194
 195   /* Write out the file offset for the file associated with each
 196      symbol, and remember to keep the offsets padded out.  */
 197
 198   current = arch->archive_head;
 199   count = 0;
 200   while (current != NULL && count < symbol_count)
 201     {
 202       /* For each symbol which is used defined in this object, write out
 203          the object file's address in the archive */
 204
 205       while (map[count].u.abfd == current)
 206         {
 207           bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
 208           if (bfd_bwrite (buf, 8, arch) != 8)
 209             return FALSE;
 210           count++;
 211         }
 212       /* Add size of this archive entry */
 213       archive_member_file_ptr += (arelt_size (current)
 214                                   + sizeof (struct ar_hdr));
 215       /* remember about the even alignment */
 216       archive_member_file_ptr += archive_member_file_ptr % 2;
 217       current = current->archive_next;
 218     }
 219
 220   /* now write the strings themselves */
 221   for (count = 0; count < symbol_count; count++)
 222     {
 223       size_t len = strlen (*map[count].name) + 1;
 224
 225       if (bfd_bwrite (*map[count].name, len, arch) != len)
 226         return FALSE;
 227     }
 228
 229   /* The spec says that this should be padded to an 8 byte boundary.
 230      However, the Irix 6.2 tools do not appear to do this.  */
 231   while (padding != 0)
 232     {
 233       if (bfd_bwrite ("", 1, arch) != 1)
 234         return FALSE;
 235       --padding;
 236     }
 237
 238   return TRUE;
 239 }