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    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   file_ptr arhdrpos;
  47   bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
  48   struct areltdata *mapdata;
  49   bfd_byte int_buf[8];
  50   char *stringbase;
  51   bfd_byte *raw_armap = NULL;
  52   carsym *carsyms;
  53   bfd_size_type amt;
  54
  55   ardata->symdefs = NULL;
  56
  57   /* Get the name of the first element.  */
  58   arhdrpos = bfd_tell (abfd);
  59   i = bfd_bread (nextname, 16, abfd);
  60   if (i == 0)
  61     return TRUE;
  62   if (i != 16)
  63     return FALSE;
  64
  65   if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
  66     return FALSE;
  67
  68   /* Archives with traditional armaps are still permitted.  */
  69   if (CONST_STRNEQ (nextname, "/               "))
  70     return bfd_slurp_armap (abfd);
  71
  72   if (! CONST_STRNEQ (nextname, "/SYM64/         "))
  73     {
  74       bfd_has_map (abfd) = FALSE;
  75       return TRUE;
  76     }
  77
  78   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
  79   if (mapdata == NULL)
  80     return FALSE;
  81   parsed_size = mapdata->parsed_size;
  82   bfd_release (abfd, mapdata);
  83
  84   if (bfd_bread (int_buf, 8, abfd) != 8)
  85     {
  86       if (bfd_get_error () != bfd_error_system_call)
  87         bfd_set_error (bfd_error_malformed_archive);
  88       return FALSE;
  89     }
  90
  91   nsymz = bfd_getb64 (int_buf);
  92   stringsize = parsed_size - 8 * nsymz - 8;
  93
  94   carsym_size = nsymz * sizeof (carsym);
  95   ptrsize = 8 * nsymz;
  96
  97   amt = carsym_size + stringsize + 1;
  98   ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt);
  99   if (ardata->symdefs == NULL)
 100     return FALSE;
 101   carsyms = ardata->symdefs;
 102   stringbase = ((char *) ardata->symdefs) + carsym_size;
 103
 104   raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize);
 105   if (raw_armap == NULL)
 106     goto release_symdefs;
 107
 108   if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
 109       || bfd_bread (stringbase, stringsize, abfd) != stringsize)
 110     {
 111       if (bfd_get_error () != bfd_error_system_call)
 112         bfd_set_error (bfd_error_malformed_archive);
 113       goto release_raw_armap;
 114     }
 115
 116   for (i = 0; i < nsymz; i++)
 117     {
 118       carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
 119       carsyms->name = stringbase;
 120       stringbase += strlen (stringbase) + 1;
 121       ++carsyms;
 122     }
 123   *stringbase = '\0';
 124
 125   ardata->symdef_count = nsymz;
 126   ardata->first_file_filepos = bfd_tell (abfd);
 127   /* Pad to an even boundary if you have to.  */
 128   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
 129
 130   bfd_has_map (abfd) = TRUE;
 131   bfd_release (abfd, raw_armap);
 132
 133   return TRUE;
 134
 135 release_raw_armap:
 136   bfd_release (abfd, raw_armap);
 137 release_symdefs:
 138   bfd_release (abfd, ardata->symdefs);
 139   return FALSE;
 140 }
 141
 142 /* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
 143    able to handle ordinary ELF armaps, but at least on Irix 6.2 the
 144    linker crashes.  */
 145
 146 bfd_boolean
 147 bfd_elf64_archive_write_armap (bfd *arch,
 148                                unsigned int elength,
 149                                struct orl *map,
 150                                unsigned int symbol_count,
 151                                int stridx)
 152 {
 153   unsigned int ranlibsize = (symbol_count * 8) + 8;
 154   unsigned int stringsize = stridx;
 155   unsigned int mapsize = stringsize + ranlibsize;
 156   file_ptr archive_member_file_ptr;
 157   bfd *current = arch->archive_head;
 158   unsigned int count;
 159   struct ar_hdr hdr;
 160   int padding;
 161   bfd_byte buf[8];
 162
 163   padding = BFD_ALIGN (mapsize, 8) - mapsize;
 164   mapsize += padding;
 165
 166   /* work out where the first object file will go in the archive */
 167   archive_member_file_ptr = (mapsize
 168                              + elength
 169                              + sizeof (struct ar_hdr)
 170                              + SARMAG);
 171
 172   memset (&hdr, ' ', sizeof (struct ar_hdr));
 173   memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
 174   _bfd_ar_spacepad (hdr.ar_size, sizeof (hdr.ar_size), "%-10ld",
 175                     mapsize);
 176   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
 177                     time (NULL));
 178   /* This, at least, is what Intel coff sets the values to.: */
 179   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
 180   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
 181   _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
 182   memcpy (hdr.ar_fmag, ARFMAG, 2);
 183
 184   /* Write the ar header for this item and the number of symbols */
 185
 186   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
 187       != sizeof (struct ar_hdr))
 188     return FALSE;
 189
 190   bfd_putb64 ((bfd_vma) symbol_count, buf);
 191   if (bfd_bwrite (buf, 8, arch) != 8)
 192     return FALSE;
 193
 194   /* Two passes, first write the file offsets for each symbol -
 195      remembering that each offset is on a two byte boundary.  */
 196
 197   /* Write out the file offset for the file associated with each
 198      symbol, and remember to keep the offsets padded out.  */
 199
 200   current = arch->archive_head;
 201   count = 0;
 202   while (current != NULL && count < symbol_count)
 203     {
 204       /* For each symbol which is used defined in this object, write out
 205          the object file's address in the archive */
 206
 207       while (map[count].u.abfd == current)
 208         {
 209           bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
 210           if (bfd_bwrite (buf, 8, arch) != 8)
 211             return FALSE;
 212           count++;
 213         }
 214       /* Add size of this archive entry */
 215       archive_member_file_ptr += (arelt_size (current)
 216                                   + sizeof (struct ar_hdr));
 217       /* remember about the even alignment */
 218       archive_member_file_ptr += archive_member_file_ptr % 2;
 219       current = current->archive_next;
 220     }
 221
 222   /* now write the strings themselves */
 223   for (count = 0; count < symbol_count; count++)
 224     {
 225       size_t len = strlen (*map[count].name) + 1;
 226
 227       if (bfd_bwrite (*map[count].name, len, arch) != len)
 228         return FALSE;
 229     }
 230
 231   /* The spec says that this should be padded to an 8 byte boundary.
 232      However, the Irix 6.2 tools do not appear to do this.  */
 233   while (padding != 0)
 234     {
 235       if (bfd_bwrite ("", 1, arch) != 1)
 236         return FALSE;
 237       --padding;
 238     }
 239
 240   return TRUE;
 241 }