1 /* Support for 64-bit ELF archives. 2 Copyright (C) 1996-2014 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 (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 bfd_byte *raw_armap = NULL; 50 carsym *carsyms; 51 bfd_size_type amt; 52 53 ardata->symdefs = NULL; 54 55 /* Get the name of the first element. */ 56 i = bfd_bread (nextname, 16, abfd); 57 if (i == 0) 58 return TRUE; 59 if (i != 16) 60 return FALSE; 61 62 if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0) 63 return FALSE; 64 65 /* Archives with traditional armaps are still permitted. */ 66 if (CONST_STRNEQ (nextname, "/ ")) 67 return bfd_slurp_armap (abfd); 68 69 if (! CONST_STRNEQ (nextname, "/SYM64/ ")) 70 { 71 bfd_has_map (abfd) = FALSE; 72 return TRUE; 73 } 74 75 mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd); 76 if (mapdata == NULL) 77 return FALSE; 78 parsed_size = mapdata->parsed_size; 79 free (mapdata); 80 81 if (bfd_bread (int_buf, 8, abfd) != 8) 82 { 83 if (bfd_get_error () != bfd_error_system_call) 84 bfd_set_error (bfd_error_malformed_archive); 85 return FALSE; 86 } 87 88 nsymz = bfd_getb64 (int_buf); 89 stringsize = parsed_size - 8 * nsymz - 8; 90 91 carsym_size = nsymz * sizeof (carsym); 92 ptrsize = 8 * nsymz; 93 94 amt = carsym_size + stringsize + 1; 95 ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt); 96 if (ardata->symdefs == NULL) 97 return FALSE; 98 carsyms = ardata->symdefs; 99 stringbase = ((char *) ardata->symdefs) + carsym_size; 100 101 raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize); 102 if (raw_armap == NULL) 103 goto release_symdefs; 104 105 if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize 106 || bfd_bread (stringbase, stringsize, abfd) != stringsize) 107 { 108 if (bfd_get_error () != bfd_error_system_call) 109 bfd_set_error (bfd_error_malformed_archive); 110 goto release_raw_armap; 111 } 112 113 for (i = 0; i < nsymz; i++) 114 { 115 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); 116 carsyms->name = stringbase; 117 stringbase += strlen (stringbase) + 1; 118 ++carsyms; 119 } 120 *stringbase = '\0'; 121 122 ardata->symdef_count = nsymz; 123 ardata->first_file_filepos = bfd_tell (abfd); 124 /* Pad to an even boundary if you have to. */ 125 ardata->first_file_filepos += (ardata->first_file_filepos) % 2; 126 127 bfd_has_map (abfd) = TRUE; 128 bfd_release (abfd, raw_armap); 129 130 return TRUE; 131 132 release_raw_armap: 133 bfd_release (abfd, raw_armap); 134 release_symdefs: 135 bfd_release (abfd, ardata->symdefs); 136 return FALSE; 137 } 138 139 /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be 140 able to handle ordinary ELF armaps, but at least on Irix 6.2 the 141 linker crashes. */ 142 143 bfd_boolean 144 bfd_elf64_archive_write_armap (bfd *arch, 145 unsigned int elength, 146 struct orl *map, 147 unsigned int symbol_count, 148 int stridx) 149 { 150 unsigned int ranlibsize = (symbol_count * 8) + 8; 151 unsigned int stringsize = stridx; 152 unsigned int mapsize = stringsize + ranlibsize; 153 file_ptr archive_member_file_ptr; 154 bfd *current = arch->archive_head; 155 unsigned int count; 156 struct ar_hdr hdr; 157 int padding; 158 bfd_byte buf[8]; 159 160 padding = BFD_ALIGN (mapsize, 8) - mapsize; 161 mapsize += padding; 162 163 /* work out where the first object file will go in the archive */ 164 archive_member_file_ptr = (mapsize 165 + elength 166 + sizeof (struct ar_hdr) 167 + SARMAG); 168 169 memset (&hdr, ' ', sizeof (struct ar_hdr)); 170 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); 171 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) 172 return FALSE; 173 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", 174 time (NULL)); 175 /* This, at least, is what Intel coff sets the values to.: */ 176 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); 177 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); 178 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); 179 memcpy (hdr.ar_fmag, ARFMAG, 2); 180 181 /* Write the ar header for this item and the number of symbols */ 182 183 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) 184 != sizeof (struct ar_hdr)) 185 return FALSE; 186 187 bfd_putb64 ((bfd_vma) symbol_count, buf); 188 if (bfd_bwrite (buf, 8, arch) != 8) 189 return FALSE; 190 191 /* Two passes, first write the file offsets for each symbol - 192 remembering that each offset is on a two byte boundary. */ 193 194 /* Write out the file offset for the file associated with each 195 symbol, and remember to keep the offsets padded out. */ 196 count = 0; 197 for (current = arch->archive_head; 198 current != NULL && count < symbol_count; 199 current = current->archive_next) 200 { 201 /* For each symbol which is used defined in this object, write out 202 the object file's address in the archive. */ 203 204 for (; 205 count < symbol_count && map[count].u.abfd == current; 206 count++) 207 { 208 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); 209 if (bfd_bwrite (buf, 8, arch) != 8) 210 return FALSE; 211 } 212 213 /* Add size of this archive entry */ 214 archive_member_file_ptr += sizeof (struct ar_hdr); 215 if (! bfd_is_thin_archive (arch)) 216 archive_member_file_ptr += arelt_size (current); 217 /* remember about the even alignment */ 218 archive_member_file_ptr += archive_member_file_ptr % 2; 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 } 241
