1 /* Support for 64-bit ELF archives. 2 Copyright (C) 1996-2015 Free Software Foundation, Inc. 3 Ian Lance Taylor, Cygnus Support 4 Linker support added by Mark Mitchell, CodeSourcery, LLC. 5 <mark@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 (MIPS) ELF archives. */ 25 26 #include "sysdep.h" 27 #include "bfd.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 bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize; 46 struct areltdata *mapdata; 47 bfd_byte int_buf[8]; 48 char *stringbase; 49 char *stringend; 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 free (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 if (carsym_size < nsymz || ptrsize < nsymz || amt < nsymz) 97 { 98 bfd_set_error (bfd_error_malformed_archive); 99 return FALSE; 100 } 101 ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt); 102 if (ardata->symdefs == NULL) 103 return FALSE; 104 carsyms = ardata->symdefs; 105 stringbase = ((char *) ardata->symdefs) + carsym_size; 106 stringbase[stringsize] = 0; 107 stringend = stringbase + stringsize; 108 109 raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize); 110 if (raw_armap == NULL) 111 goto release_symdefs; 112 113 if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize 114 || bfd_bread (stringbase, stringsize, abfd) != stringsize) 115 { 116 if (bfd_get_error () != bfd_error_system_call) 117 bfd_set_error (bfd_error_malformed_archive); 118 goto release_raw_armap; 119 } 120 121 for (i = 0; i < nsymz; i++) 122 { 123 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); 124 carsyms->name = stringbase; 125 if (stringbase < stringend) 126 stringbase += strlen (stringbase) + 1; 127 ++carsyms; 128 } 129 *stringbase = '\0'; 130 131 ardata->symdef_count = nsymz; 132 ardata->first_file_filepos = bfd_tell (abfd); 133 /* Pad to an even boundary if you have to. */ 134 ardata->first_file_filepos += (ardata->first_file_filepos) % 2; 135 136 bfd_has_map (abfd) = TRUE; 137 bfd_release (abfd, raw_armap); 138 139 return TRUE; 140 141 release_raw_armap: 142 bfd_release (abfd, raw_armap); 143 release_symdefs: 144 bfd_release (abfd, ardata->symdefs); 145 return FALSE; 146 } 147 148 /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be 149 able to handle ordinary ELF armaps, but at least on Irix 6.2 the 150 linker crashes. */ 151 152 bfd_boolean 153 bfd_elf64_archive_write_armap (bfd *arch, 154 unsigned int elength, 155 struct orl *map, 156 unsigned int symbol_count, 157 int stridx) 158 { 159 unsigned int ranlibsize = (symbol_count * 8) + 8; 160 unsigned int stringsize = stridx; 161 unsigned int mapsize = stringsize + ranlibsize; 162 file_ptr archive_member_file_ptr; 163 bfd *current = arch->archive_head; 164 unsigned int count; 165 struct ar_hdr hdr; 166 int padding; 167 bfd_byte buf[8]; 168 169 padding = BFD_ALIGN (mapsize, 8) - mapsize; 170 mapsize += padding; 171 172 /* work out where the first object file will go in the archive */ 173 archive_member_file_ptr = (mapsize 174 + elength 175 + sizeof (struct ar_hdr) 176 + SARMAG); 177 178 memset (&hdr, ' ', sizeof (struct ar_hdr)); 179 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); 180 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) 181 return FALSE; 182 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", 183 time (NULL)); 184 /* This, at least, is what Intel coff sets the values to.: */ 185 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); 186 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); 187 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); 188 memcpy (hdr.ar_fmag, ARFMAG, 2); 189 190 /* Write the ar header for this item and the number of symbols */ 191 192 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) 193 != sizeof (struct ar_hdr)) 194 return FALSE; 195 196 bfd_putb64 ((bfd_vma) symbol_count, buf); 197 if (bfd_bwrite (buf, 8, arch) != 8) 198 return FALSE; 199 200 /* Two passes, first write the file offsets for each symbol - 201 remembering that each offset is on a two byte boundary. */ 202 203 /* Write out the file offset for the file associated with each 204 symbol, and remember to keep the offsets padded out. */ 205 count = 0; 206 for (current = arch->archive_head; 207 current != NULL && count < symbol_count; 208 current = current->archive_next) 209 { 210 /* For each symbol which is used defined in this object, write out 211 the object file's address in the archive. */ 212 213 for (; 214 count < symbol_count && map[count].u.abfd == current; 215 count++) 216 { 217 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); 218 if (bfd_bwrite (buf, 8, arch) != 8) 219 return FALSE; 220 } 221 222 /* Add size of this archive entry */ 223 archive_member_file_ptr += sizeof (struct ar_hdr); 224 if (! bfd_is_thin_archive (arch)) 225 archive_member_file_ptr += arelt_size (current); 226 /* remember about the even alignment */ 227 archive_member_file_ptr += archive_member_file_ptr % 2; 228 } 229 230 /* now write the strings themselves */ 231 for (count = 0; count < symbol_count; count++) 232 { 233 size_t len = strlen (*map[count].name) + 1; 234 235 if (bfd_bwrite (*map[count].name, len, arch) != len) 236 return FALSE; 237 } 238 239 /* The spec says that this should be padded to an 8 byte boundary. 240 However, the Irix 6.2 tools do not appear to do this. */ 241 while (padding != 0) 242 { 243 if (bfd_bwrite ("", 1, arch) != 1) 244 return FALSE; 245 --padding; 246 } 247 248 return TRUE; 249 } 250