1/* Support for 64-bit archives. 2 Copyright (C) 1996-2020 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 37bfd_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 abfd->has_armap = 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 (/* Catch overflow in stringsize (and ptrsize) expression. */ 94 nsymz >= (bfd_size_type) -1 / 8 95 || stringsize > parsed_size 96 /* Catch overflow in carsym_size expression. */ 97 || nsymz > (bfd_size_type) -1 / sizeof (carsym) 98 /* Catch overflow in amt expression. */ 99 || amt <= carsym_size 100 || amt <= stringsize) 101 { 102 bfd_set_error (bfd_error_malformed_archive); 103 return FALSE; 104 } 105 ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt); 106 if (ardata->symdefs == NULL) 107 return FALSE; 108 carsyms = ardata->symdefs; 109 stringbase = ((char *) ardata->symdefs) + carsym_size; 110 111 raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize); 112 if (raw_armap == NULL) 113 goto release_symdefs; 114 115 if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize 116 || bfd_bread (stringbase, stringsize, abfd) != stringsize) 117 { 118 if (bfd_get_error () != bfd_error_system_call) 119 bfd_set_error (bfd_error_malformed_archive); 120 goto release_raw_armap; 121 } 122 123 stringend = stringbase + stringsize; 124 *stringend = 0; 125 for (i = 0; i < nsymz; i++) 126 { 127 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); 128 carsyms->name = stringbase; 129 stringbase += strlen (stringbase); 130 if (stringbase != stringend) 131 ++stringbase; 132 ++carsyms; 133 } 134 135 ardata->symdef_count = nsymz; 136 ardata->first_file_filepos = bfd_tell (abfd); 137 /* Pad to an even boundary if you have to. */ 138 ardata->first_file_filepos += (ardata->first_file_filepos) % 2; 139 140 abfd->has_armap = TRUE; 141 bfd_release (abfd, raw_armap); 142 143 return TRUE; 144 145release_raw_armap: 146 bfd_release (abfd, raw_armap); 147release_symdefs: 148 bfd_release (abfd, ardata->symdefs); 149 return FALSE; 150} 151 152/* Write out an Irix 6 armap. The Irix 6 tools are supposed to be 153 able to handle ordinary ELF armaps, but at least on Irix 6.2 the 154 linker crashes. */ 155 156bfd_boolean 157_bfd_archive_64_bit_write_armap (bfd *arch, 158 unsigned int elength, 159 struct orl *map, 160 unsigned int symbol_count, 161 int stridx) 162{ 163 unsigned int ranlibsize = (symbol_count * 8) + 8; 164 unsigned int stringsize = stridx; 165 unsigned int mapsize = stringsize + ranlibsize; 166 file_ptr archive_member_file_ptr; 167 bfd *current = arch->archive_head; 168 unsigned int count; 169 struct ar_hdr hdr; 170 int padding; 171 bfd_byte buf[8]; 172 173 padding = BFD_ALIGN (mapsize, 8) - mapsize; 174 mapsize += padding; 175 176 /* work out where the first object file will go in the archive */ 177 archive_member_file_ptr = (mapsize 178 + elength 179 + sizeof (struct ar_hdr) 180 + SARMAG); 181 182 memset (&hdr, ' ', sizeof (struct ar_hdr)); 183 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); 184 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) 185 return FALSE; 186 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", 187 time (NULL)); 188 /* This, at least, is what Intel coff sets the values to.: */ 189 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); 190 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); 191 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); 192 memcpy (hdr.ar_fmag, ARFMAG, 2); 193 194 /* Write the ar header for this item and the number of symbols */ 195 196 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) 197 != sizeof (struct ar_hdr)) 198 return FALSE; 199 200 bfd_putb64 ((bfd_vma) symbol_count, buf); 201 if (bfd_bwrite (buf, 8, arch) != 8) 202 return FALSE; 203 204 /* Two passes, first write the file offsets for each symbol - 205 remembering that each offset is on a two byte boundary. */ 206 207 /* Write out the file offset for the file associated with each 208 symbol, and remember to keep the offsets padded out. */ 209 count = 0; 210 for (current = arch->archive_head; 211 current != NULL && count < symbol_count; 212 current = current->archive_next) 213 { 214 /* For each symbol which is used defined in this object, write out 215 the object file's address in the archive. */ 216 217 for (; 218 count < symbol_count && map[count].u.abfd == current; 219 count++) 220 { 221 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); 222 if (bfd_bwrite (buf, 8, arch) != 8) 223 return FALSE; 224 } 225 226 /* Add size of this archive entry */ 227 archive_member_file_ptr += sizeof (struct ar_hdr); 228 if (! bfd_is_thin_archive (arch)) 229 archive_member_file_ptr += arelt_size (current); 230 /* remember about the even alignment */ 231 archive_member_file_ptr += archive_member_file_ptr % 2; 232 } 233 234 /* now write the strings themselves */ 235 for (count = 0; count < symbol_count; count++) 236 { 237 size_t len = strlen (*map[count].name) + 1; 238 239 if (bfd_bwrite (*map[count].name, len, arch) != len) 240 return FALSE; 241 } 242 243 /* The spec says that this should be padded to an 8 byte boundary. 244 However, the Irix 6.2 tools do not appear to do this. */ 245 while (padding != 0) 246 { 247 if (bfd_bwrite ("", 1, arch) != 1) 248 return FALSE; 249 --padding; 250 } 251 252 return TRUE; 253} 254