bfd/archive64.c

   1 /* MIPS-specific support for 64-bit ELF
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006
   3    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 2 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, MA 02110-1301, USA.  */
  23
  24 /* This file supports the 64-bit (MIPS) ELF archives.  */
  25
  26 #include "bfd.h"
  27 #include "sysdep.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   file_ptr arhdrpos;
  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   arhdrpos = bfd_tell (abfd);
  58   i = bfd_bread (nextname, 16, abfd);
  59   if (i == 0)
  60     return TRUE;
  61   if (i != 16)
  62     return FALSE;
  63
  64   if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
  65     return FALSE;
  66
  67   /* Archives with traditional armaps are still permitted.  */
  68   if (CONST_STRNEQ (nextname, "/               "))
  69     return bfd_slurp_armap (abfd);
  70
  71   if (! CONST_STRNEQ (nextname, "/SYM64/         "))
  72     {
  73       bfd_has_map (abfd) = FALSE;
  74       return TRUE;
  75     }
  76
  77   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
  78   if (mapdata == NULL)
  79     return FALSE;
  80   parsed_size = mapdata->parsed_size;
  81   bfd_release (abfd, mapdata);
  82
  83   if (bfd_bread (int_buf, 8, abfd) != 8)
  84     {
  85       if (bfd_get_error () != bfd_error_system_call)
  86         bfd_set_error (bfd_error_malformed_archive);
  87       return FALSE;
  88     }
  89
  90   nsymz = bfd_getb64 (int_buf);
  91   stringsize = parsed_size - 8 * nsymz - 8;
  92
  93   carsym_size = nsymz * sizeof (carsym);
  94   ptrsize = 8 * nsymz;
  95
  96   amt = carsym_size + stringsize + 1;
  97   ardata->symdefs = bfd_zalloc (abfd, amt);
  98   if (ardata->symdefs == NULL)
  99     return FALSE;
 100   carsyms = ardata->symdefs;
 101   stringbase = ((char *) ardata->symdefs) + carsym_size;
 102
 103   raw_armap = bfd_alloc (abfd, ptrsize);
 104   if (raw_armap == NULL)
 105     goto release_symdefs;
 106
 107   if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
 108       || bfd_bread (stringbase, stringsize, abfd) != stringsize)
 109     {
 110       if (bfd_get_error () != bfd_error_system_call)
 111         bfd_set_error (bfd_error_malformed_archive);
 112       goto release_raw_armap;
 113     }
 114
 115   for (i = 0; i < nsymz; i++)
 116     {
 117       carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
 118       carsyms->name = stringbase;
 119       stringbase += strlen (stringbase) + 1;
 120       ++carsyms;
 121     }
 122   *stringbase = '\0';
 123
 124   ardata->symdef_count = nsymz;
 125   ardata->first_file_filepos = bfd_tell (abfd);
 126   /* Pad to an even boundary if you have to.  */
 127   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
 128
 129   bfd_has_map (abfd) = TRUE;
 130   bfd_release (abfd, raw_armap);
 131
 132   return TRUE;
 133
 134 release_raw_armap:
 135   bfd_release (abfd, raw_armap);
 136 release_symdefs:
 137   bfd_release (abfd, ardata->symdefs);
 138   return FALSE;
 139 }
 140
 141 /* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
 142    able to handle ordinary ELF armaps, but at least on Irix 6.2 the
 143    linker crashes.  */
 144
 145 bfd_boolean
 146 bfd_elf64_archive_write_armap (bfd *arch,
 147                                unsigned int elength,
 148                                struct orl *map,
 149                                unsigned int symbol_count,
 150                                int stridx)
 151 {
 152   unsigned int ranlibsize = (symbol_count * 8) + 8;
 153   unsigned int stringsize = stridx;
 154   unsigned int mapsize = stringsize + ranlibsize;
 155   file_ptr archive_member_file_ptr;
 156   bfd *current = arch->archive_head;
 157   unsigned int count;
 158   struct ar_hdr hdr;
 159   int padding;
 160   bfd_byte buf[8];
 161
 162   padding = BFD_ALIGN (mapsize, 8) - mapsize;
 163   mapsize += padding;
 164
 165   /* work out where the first object file will go in the archive */
 166   archive_member_file_ptr = (mapsize
 167                              + elength
 168                              + sizeof (struct ar_hdr)
 169                              + SARMAG);
 170
 171   memset (&hdr, ' ', sizeof (struct ar_hdr));
 172   memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
 173   _bfd_ar_spacepad (hdr.ar_size, sizeof (hdr.ar_size), "%-10ld",
 174                     mapsize);
 175   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
 176                     time (NULL));
 177   /* This, at least, is what Intel coff sets the values to.: */
 178   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
 179   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
 180   _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
 181   memcpy (hdr.ar_fmag, ARFMAG, 2);
 182
 183   /* Write the ar header for this item and the number of symbols */
 184
 185   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
 186       != sizeof (struct ar_hdr))
 187     return FALSE;
 188
 189   bfd_putb64 ((bfd_vma) symbol_count, buf);
 190   if (bfd_bwrite (buf, 8, arch) != 8)
 191     return FALSE;
 192
 193   /* Two passes, first write the file offsets for each symbol -
 194      remembering that each offset is on a two byte boundary.  */
 195
 196   /* Write out the file offset for the file associated with each
 197      symbol, and remember to keep the offsets padded out.  */
 198
 199   current = arch->archive_head;
 200   count = 0;
 201   while (current != NULL && count < symbol_count)
 202     {
 203       /* For each symbol which is used defined in this object, write out
 204          the object file's address in the archive */
 205
 206       while (map[count].u.abfd == current)
 207         {
 208           bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
 209           if (bfd_bwrite (buf, 8, arch) != 8)
 210             return FALSE;
 211           count++;
 212         }
 213       /* Add size of this archive entry */
 214       archive_member_file_ptr += (arelt_size (current)
 215                                   + sizeof (struct ar_hdr));
 216       /* remember about the even alignment */
 217       archive_member_file_ptr += archive_member_file_ptr % 2;
 218       current = current->next;
 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 }