1 /* Support for 64-bit archives. 2 Copyright (C) 1996-2016 Free Software Foundation, Inc. 3 Ian Lance Taylor, Cygnus Support 4 Linker support added by Mark Mitchell, CodeSourcery, LLC. 5 <mark (at) 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 archives. We use the same format as 25 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 /* Read an Irix 6 armap. */ 36 37 bfd_boolean 38 _bfd_archive_64_bit_slurp_armap (bfd *abfd) 39 { 40 struct artdata *ardata = bfd_ardata (abfd); 41 char nextname[17]; 42 bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize; 43 struct areltdata *mapdata; 44 bfd_byte int_buf[8]; 45 char *stringbase; 46 char *stringend; 47 bfd_byte *raw_armap = NULL; 48 carsym *carsyms; 49 bfd_size_type amt; 50 51 ardata->symdefs = NULL; 52 53 /* Get the name of the first element. */ 54 i = bfd_bread (nextname, 16, abfd); 55 if (i == 0) 56 return TRUE; 57 if (i != 16) 58 return FALSE; 59 60 if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0) 61 return FALSE; 62 63 /* Archives with traditional armaps are still permitted. */ 64 if (CONST_STRNEQ (nextname, "/ ")) 65 return bfd_slurp_armap (abfd); 66 67 if (! CONST_STRNEQ (nextname, "/SYM64/ ")) 68 { 69 bfd_has_map (abfd) = FALSE; 70 return TRUE; 71 } 72 73 mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd); 74 if (mapdata == NULL) 75 return FALSE; 76 parsed_size = mapdata->parsed_size; 77 free (mapdata); 78 79 if (bfd_bread (int_buf, 8, abfd) != 8) 80 { 81 if (bfd_get_error () != bfd_error_system_call) 82 bfd_set_error (bfd_error_malformed_archive); 83 return FALSE; 84 } 85 86 nsymz = bfd_getb64 (int_buf); 87 stringsize = parsed_size - 8 * nsymz - 8; 88 89 carsym_size = nsymz * sizeof (carsym); 90 ptrsize = 8 * nsymz; 91 92 amt = carsym_size + stringsize + 1; 93 if (carsym_size < nsymz || ptrsize < nsymz || amt < nsymz) 94 { 95 bfd_set_error (bfd_error_malformed_archive); 96 return FALSE; 97 } 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 stringbase[stringsize] = 0; 104 stringend = stringbase + stringsize; 105 106 raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize); 107 if (raw_armap == NULL) 108 goto release_symdefs; 109 110 if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize 111 || bfd_bread (stringbase, stringsize, abfd) != stringsize) 112 { 113 if (bfd_get_error () != bfd_error_system_call) 114 bfd_set_error (bfd_error_malformed_archive); 115 goto release_raw_armap; 116 } 117 118 for (i = 0; i < nsymz; i++) 119 { 120 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); 121 carsyms->name = stringbase; 122 if (stringbase < stringend) 123 stringbase += strlen (stringbase) + 1; 124 ++carsyms; 125 } 126 *stringbase = '\0'; 127 128 ardata->symdef_count = nsymz; 129 ardata->first_file_filepos = bfd_tell (abfd); 130 /* Pad to an even boundary if you have to. */ 131 ardata->first_file_filepos += (ardata->first_file_filepos) % 2; 132 133 bfd_has_map (abfd) = TRUE; 134 bfd_release (abfd, raw_armap); 135 136 return TRUE; 137 138 release_raw_armap: 139 bfd_release (abfd, raw_armap); 140 release_symdefs: 141 bfd_release (abfd, ardata->symdefs); 142 return FALSE; 143 } 144 145 /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be 146 able to handle ordinary ELF armaps, but at least on Irix 6.2 the 147 linker crashes. */ 148 149 bfd_boolean 150 _bfd_archive_64_bit_write_armap (bfd *arch, 151 unsigned int elength, 152 struct orl *map, 153 unsigned int symbol_count, 154 int stridx) 155 { 156 unsigned int ranlibsize = (symbol_count * 8) + 8; 157 unsigned int stringsize = stridx; 158 unsigned int mapsize = stringsize + ranlibsize; 159 file_ptr archive_member_file_ptr; 160 bfd *current = arch->archive_head; 161 unsigned int count; 162 struct ar_hdr hdr; 163 int padding; 164 bfd_byte buf[8]; 165 166 padding = BFD_ALIGN (mapsize, 8) - mapsize; 167 mapsize += padding; 168 169 /* work out where the first object file will go in the archive */ 170 archive_member_file_ptr = (mapsize 171 + elength 172 + sizeof (struct ar_hdr) 173 + SARMAG); 174 175 memset (&hdr, ' ', sizeof (struct ar_hdr)); 176 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); 177 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) 178 return FALSE; 179 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", 180 time (NULL)); 181 /* This, at least, is what Intel coff sets the values to.: */ 182 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); 183 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); 184 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); 185 memcpy (hdr.ar_fmag, ARFMAG, 2); 186 187 /* Write the ar header for this item and the number of symbols */ 188 189 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) 190 != sizeof (struct ar_hdr)) 191 return FALSE; 192 193 bfd_putb64 ((bfd_vma) symbol_count, buf); 194 if (bfd_bwrite (buf, 8, arch) != 8) 195 return FALSE; 196 197 /* Two passes, first write the file offsets for each symbol - 198 remembering that each offset is on a two byte boundary. */ 199 200 /* Write out the file offset for the file associated with each 201 symbol, and remember to keep the offsets padded out. */ 202 count = 0; 203 for (current = arch->archive_head; 204 current != NULL && count < symbol_count; 205 current = current->archive_next) 206 { 207 /* For each symbol which is used defined in this object, write out 208 the object file's address in the archive. */ 209 210 for (; 211 count < symbol_count && map[count].u.abfd == current; 212 count++) 213 { 214 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); 215 if (bfd_bwrite (buf, 8, arch) != 8) 216 return FALSE; 217 } 218 219 /* Add size of this archive entry */ 220 archive_member_file_ptr += sizeof (struct ar_hdr); 221 if (! bfd_is_thin_archive (arch)) 222 archive_member_file_ptr += arelt_size (current); 223 /* remember about the even alignment */ 224 archive_member_file_ptr += archive_member_file_ptr % 2; 225 } 226 227 /* now write the strings themselves */ 228 for (count = 0; count < symbol_count; count++) 229 { 230 size_t len = strlen (*map[count].name) + 1; 231 232 if (bfd_bwrite (*map[count].name, len, arch) != len) 233 return FALSE; 234 } 235 236 /* The spec says that this should be padded to an 8 byte boundary. 237 However, the Irix 6.2 tools do not appear to do this. */ 238 while (padding != 0) 239 { 240 if (bfd_bwrite ("", 1, arch) != 1) 241 return FALSE; 242 --padding; 243 } 244 245 return TRUE; 246 } 247
