bfd/archive64.c

   1 /* MIPS-specific support for 64-bit ELF
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 boolean bfd_elf64_archive_slurp_armap PARAMS ((bfd *));
  35 boolean bfd_elf64_archive_write_armap
  36   PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int));
  37
  38 /* Read an Irix 6 armap.  */
  39
  40 boolean
  41 bfd_elf64_archive_slurp_armap (abfd)
  42      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 ((PTR) nextname, (bfd_size_type) 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 (strncmp (nextname, "/               ", 16) == 0)
  70     return bfd_slurp_armap (abfd);
  71
  72   if (strncmp (nextname, "/SYM64/         ", 16) != 0)
  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, (PTR) mapdata);
  83
  84   if (bfd_bread (int_buf, (bfd_size_type) 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 = (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 boolean
 147 bfd_elf64_archive_write_armap (arch, elength, map, symbol_count, stridx)
 148      bfd *arch;
 149      unsigned int elength;
 150      struct orl *map;
 151      unsigned int symbol_count;
 152      int stridx;
 153 {
 154   unsigned int ranlibsize = (symbol_count * 8) + 8;
 155   unsigned int stringsize = stridx;
 156   unsigned int mapsize = stringsize + ranlibsize;
 157   file_ptr archive_member_file_ptr;
 158   bfd *current = arch->archive_head;
 159   unsigned int count;
 160   struct ar_hdr hdr;
 161   unsigned int i;
 162   int padding;
 163   bfd_byte buf[8];
 164
 165   padding = BFD_ALIGN (mapsize, 8) - mapsize;
 166   mapsize += padding;
 167
 168   /* work out where the first object file will go in the archive */
 169   archive_member_file_ptr = (mapsize
 170                              + elength
 171                              + sizeof (struct ar_hdr)
 172                              + SARMAG);
 173
 174   memset ((char *) (&hdr), 0, sizeof (struct ar_hdr));
 175   strcpy (hdr.ar_name, "/SYM64/");
 176   sprintf (hdr.ar_size, "%-10d", (int) mapsize);
 177   sprintf (hdr.ar_date, "%ld", (long) time (NULL));
 178   /* This, at least, is what Intel coff sets the values to.: */
 179   sprintf ((hdr.ar_uid), "%d", 0);
 180   sprintf ((hdr.ar_gid), "%d", 0);
 181   sprintf ((hdr.ar_mode), "%-7o", (unsigned) 0);
 182   strncpy (hdr.ar_fmag, ARFMAG, 2);
 183
 184   for (i = 0; i < sizeof (struct ar_hdr); i++)
 185     if (((char *) (&hdr))[i] == '\0')
 186       (((char *) (&hdr))[i]) = ' ';
 187
 188   /* Write the ar header for this item and the number of symbols */
 189
 190   if (bfd_bwrite ((PTR) &hdr, (bfd_size_type) sizeof (struct ar_hdr), arch)
 191       != sizeof (struct ar_hdr))
 192     return false;
 193
 194   bfd_putb64 ((bfd_vma) symbol_count, buf);
 195   if (bfd_bwrite (buf, (bfd_size_type) 8, arch) != 8)
 196     return false;
 197
 198   /* Two passes, first write the file offsets for each symbol -
 199      remembering that each offset is on a two byte boundary.  */
 200
 201   /* Write out the file offset for the file associated with each
 202      symbol, and remember to keep the offsets padded out.  */
 203
 204   current = arch->archive_head;
 205   count = 0;
 206   while (current != (bfd *) NULL && count < symbol_count)
 207     {
 208       /* For each symbol which is used defined in this object, write out
 209          the object file's address in the archive */
 210
 211       while (map[count].u.abfd == current)
 212         {
 213           bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
 214           if (bfd_bwrite (buf, (bfd_size_type) 8, arch) != 8)
 215             return false;
 216           count++;
 217         }
 218       /* Add size of this archive entry */
 219       archive_member_file_ptr += (arelt_size (current)
 220                                   + sizeof (struct ar_hdr));
 221       /* remember about the even alignment */
 222       archive_member_file_ptr += archive_member_file_ptr % 2;
 223       current = current->next;
 224     }
 225
 226   /* now write the strings themselves */
 227   for (count = 0; count < symbol_count; count++)
 228     {
 229       size_t len = strlen (*map[count].name) + 1;
 230
 231       if (bfd_bwrite (*map[count].name, (bfd_size_type) len, arch) != len)
 232         return false;
 233     }
 234
 235   /* The spec says that this should be padded to an 8 byte boundary.
 236      However, the Irix 6.2 tools do not appear to do this.  */
 237   while (padding != 0)
 238     {
 239       if (bfd_bwrite ("", (bfd_size_type) 1, arch) != 1)
 240         return false;
 241       --padding;
 242     }
 243
 244   return true;
 245 }