1/* Support for 64-bit archives. 2 Copyright (C) 1996-2022 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 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 37bool 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 ufile_ptr filesize; 51 52 ardata->symdefs = NULL; 53 54 /* Get the name of the first element. */ 55 i = bfd_bread (nextname, 16, abfd); 56 if (i == 0) 57 return true; 58 if (i != 16) 59 return false; 60 61 if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0) 62 return false; 63 64 /* Archives with traditional armaps are still permitted. */ 65 if (startswith (nextname, "/ ")) 66 return bfd_slurp_armap (abfd); 67 68 if (! startswith (nextname, "/SYM64/ ")) 69 { 70 abfd->has_armap = false; 71 return true; 72 } 73 74 mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd); 75 if (mapdata == NULL) 76 return false; 77 parsed_size = mapdata->parsed_size; 78 free (mapdata); 79 80 filesize = bfd_get_file_size (abfd); 81 if (filesize != 0 && parsed_size > filesize) 82 { 83 bfd_set_error (bfd_error_malformed_archive); 84 return false; 85 } 86 87 if (bfd_bread (int_buf, 8, abfd) != 8) 88 { 89 if (bfd_get_error () != bfd_error_system_call) 90 bfd_set_error (bfd_error_malformed_archive); 91 return false; 92 } 93 94 nsymz = bfd_getb64 (int_buf); 95 stringsize = parsed_size - 8 * nsymz - 8; 96 97 carsym_size = nsymz * sizeof (carsym); 98 ptrsize = 8 * nsymz; 99 100 amt = carsym_size + stringsize + 1; 101 if (/* Catch overflow in stringsize (and ptrsize) expression. */ 102 nsymz >= (bfd_size_type) -1 / 8 103 || stringsize > parsed_size 104 /* Catch overflow in carsym_size expression. */ 105 || nsymz > (bfd_size_type) -1 / sizeof (carsym) 106 /* Catch overflow in amt expression. */ 107 || amt <= carsym_size 108 || amt <= stringsize) 109 { 110 bfd_set_error (bfd_error_malformed_archive); 111 return false; 112 } 113 ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt); 114 if (ardata->symdefs == NULL) 115 return false; 116 carsyms = ardata->symdefs; 117 stringbase = ((char *) ardata->symdefs) + carsym_size; 118 119 raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize); 120 if (raw_armap == NULL 121 || bfd_bread (stringbase, stringsize, abfd) != stringsize) 122 { 123 if (bfd_get_error () != bfd_error_system_call) 124 bfd_set_error (bfd_error_malformed_archive); 125 goto release_symdefs; 126 } 127 128 stringend = stringbase + stringsize; 129 *stringend = 0; 130 for (i = 0; i < nsymz; i++) 131 { 132 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); 133 carsyms->name = stringbase; 134 stringbase += strlen (stringbase); 135 if (stringbase != stringend) 136 ++stringbase; 137 ++carsyms; 138 } 139 140 ardata->symdef_count = nsymz; 141 ardata->first_file_filepos = bfd_tell (abfd); 142 /* Pad to an even boundary if you have to. */ 143 ardata->first_file_filepos += (ardata->first_file_filepos) % 2; 144 145 abfd->has_armap = true; 146 bfd_release (abfd, raw_armap); 147 148 return true; 149 150 release_symdefs: 151 bfd_release (abfd, ardata->symdefs); 152 return false; 153} 154 155/* Write out an Irix 6 armap. The Irix 6 tools are supposed to be 156 able to handle ordinary ELF armaps, but at least on Irix 6.2 the 157 linker crashes. */ 158 159bool 160_bfd_archive_64_bit_write_armap (bfd *arch, 161 unsigned int elength, 162 struct orl *map, 163 unsigned int symbol_count, 164 int stridx) 165{ 166 unsigned int ranlibsize = (symbol_count * 8) + 8; 167 unsigned int stringsize = stridx; 168 unsigned int mapsize = stringsize + ranlibsize; 169 file_ptr archive_member_file_ptr; 170 bfd *current = arch->archive_head; 171 unsigned int count; 172 struct ar_hdr hdr; 173 int padding; 174 bfd_byte buf[8]; 175 176 padding = BFD_ALIGN (mapsize, 8) - mapsize; 177 mapsize += padding; 178 179 /* work out where the first object file will go in the archive */ 180 archive_member_file_ptr = (mapsize 181 + elength 182 + sizeof (struct ar_hdr) 183 + SARMAG); 184 185 memset (&hdr, ' ', sizeof (struct ar_hdr)); 186 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); 187 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) 188 return false; 189 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", 190 time (NULL)); 191 /* This, at least, is what Intel coff sets the values to.: */ 192 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); 193 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); 194 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); 195 memcpy (hdr.ar_fmag, ARFMAG, 2); 196 197 /* Write the ar header for this item and the number of symbols */ 198 199 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) 200 != sizeof (struct ar_hdr)) 201 return false; 202 203 bfd_putb64 ((bfd_vma) symbol_count, buf); 204 if (bfd_bwrite (buf, 8, arch) != 8) 205 return false; 206 207 /* Two passes, first write the file offsets for each symbol - 208 remembering that each offset is on a two byte boundary. */ 209 210 /* Write out the file offset for the file associated with each 211 symbol, and remember to keep the offsets padded out. */ 212 count = 0; 213 for (current = arch->archive_head; 214 current != NULL && count < symbol_count; 215 current = current->archive_next) 216 { 217 /* For each symbol which is used defined in this object, write out 218 the object file's address in the archive. */ 219 220 for (; 221 count < symbol_count && map[count].u.abfd == current; 222 count++) 223 { 224 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); 225 if (bfd_bwrite (buf, 8, arch) != 8) 226 return false; 227 } 228 229 /* Add size of this archive entry */ 230 archive_member_file_ptr += sizeof (struct ar_hdr); 231 if (! bfd_is_thin_archive (arch)) 232 archive_member_file_ptr += arelt_size (current); 233 /* remember about the even alignment */ 234 archive_member_file_ptr += archive_member_file_ptr % 2; 235 } 236 237 /* now write the strings themselves */ 238 for (count = 0; count < symbol_count; count++) 239 { 240 size_t len = strlen (*map[count].name) + 1; 241 242 if (bfd_bwrite (*map[count].name, len, arch) != len) 243 return false; 244 } 245 246 /* The spec says that this should be padded to an 8 byte boundary. 247 However, the Irix 6.2 tools do not appear to do this. */ 248 while (padding != 0) 249 { 250 if (bfd_bwrite ("", 1, arch) != 1) 251 return false; 252 --padding; 253 } 254 255 return true; 256} 257