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- /* Support for 64-bit archives.
- Copyright (C) 1996-2022 Free Software Foundation, Inc.
- Ian Lance Taylor, Cygnus Support
- Linker support added by Mark Mitchell, CodeSourcery, LLC.
- <mark@codesourcery.com>
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- /* This file supports the 64-bit archives. We use the same format as
- the 64-bit (MIPS) ELF archives. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "aout/ar.h"
- /* Irix 6 defines a 64bit archive map format, so that they can
- have archives more than 4 GB in size. */
- /* Read an Irix 6 armap. */
- bool
- _bfd_archive_64_bit_slurp_armap (bfd *abfd)
- {
- struct artdata *ardata = bfd_ardata (abfd);
- char nextname[17];
- bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
- struct areltdata *mapdata;
- bfd_byte int_buf[8];
- char *stringbase;
- char *stringend;
- bfd_byte *raw_armap = NULL;
- carsym *carsyms;
- bfd_size_type amt;
- ufile_ptr filesize;
- ardata->symdefs = NULL;
- /* Get the name of the first element. */
- i = bfd_bread (nextname, 16, abfd);
- if (i == 0)
- return true;
- if (i != 16)
- return false;
- if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
- return false;
- /* Archives with traditional armaps are still permitted. */
- if (startswith (nextname, "/ "))
- return bfd_slurp_armap (abfd);
- if (! startswith (nextname, "/SYM64/ "))
- {
- abfd->has_armap = false;
- return true;
- }
- mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
- if (mapdata == NULL)
- return false;
- parsed_size = mapdata->parsed_size;
- free (mapdata);
- filesize = bfd_get_file_size (abfd);
- if (filesize != 0 && parsed_size > filesize)
- {
- bfd_set_error (bfd_error_malformed_archive);
- return false;
- }
- if (bfd_bread (int_buf, 8, abfd) != 8)
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_malformed_archive);
- return false;
- }
- nsymz = bfd_getb64 (int_buf);
- stringsize = parsed_size - 8 * nsymz - 8;
- carsym_size = nsymz * sizeof (carsym);
- ptrsize = 8 * nsymz;
- amt = carsym_size + stringsize + 1;
- if (/* Catch overflow in stringsize (and ptrsize) expression. */
- nsymz >= (bfd_size_type) -1 / 8
- || stringsize > parsed_size
- /* Catch overflow in carsym_size expression. */
- || nsymz > (bfd_size_type) -1 / sizeof (carsym)
- /* Catch overflow in amt expression. */
- || amt <= carsym_size
- || amt <= stringsize)
- {
- bfd_set_error (bfd_error_malformed_archive);
- return false;
- }
- ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
- if (ardata->symdefs == NULL)
- return false;
- carsyms = ardata->symdefs;
- stringbase = ((char *) ardata->symdefs) + carsym_size;
- raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize);
- if (raw_armap == NULL
- || bfd_bread (stringbase, stringsize, abfd) != stringsize)
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_malformed_archive);
- goto release_symdefs;
- }
- stringend = stringbase + stringsize;
- *stringend = 0;
- for (i = 0; i < nsymz; i++)
- {
- carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
- carsyms->name = stringbase;
- stringbase += strlen (stringbase);
- if (stringbase != stringend)
- ++stringbase;
- ++carsyms;
- }
- ardata->symdef_count = nsymz;
- ardata->first_file_filepos = bfd_tell (abfd);
- /* Pad to an even boundary if you have to. */
- ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
- abfd->has_armap = true;
- bfd_release (abfd, raw_armap);
- return true;
- release_symdefs:
- bfd_release (abfd, ardata->symdefs);
- return false;
- }
- /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be
- able to handle ordinary ELF armaps, but at least on Irix 6.2 the
- linker crashes. */
- bool
- _bfd_archive_64_bit_write_armap (bfd *arch,
- unsigned int elength,
- struct orl *map,
- unsigned int symbol_count,
- int stridx)
- {
- unsigned int ranlibsize = (symbol_count * 8) + 8;
- unsigned int stringsize = stridx;
- unsigned int mapsize = stringsize + ranlibsize;
- file_ptr archive_member_file_ptr;
- bfd *current = arch->archive_head;
- unsigned int count;
- struct ar_hdr hdr;
- int padding;
- bfd_byte buf[8];
- padding = BFD_ALIGN (mapsize, 8) - mapsize;
- mapsize += padding;
- /* work out where the first object file will go in the archive */
- archive_member_file_ptr = (mapsize
- + elength
- + sizeof (struct ar_hdr)
- + SARMAG);
- memset (&hdr, ' ', sizeof (struct ar_hdr));
- memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
- if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
- return false;
- _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
- time (NULL));
- /* This, at least, is what Intel coff sets the values to.: */
- _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
- _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
- _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
- memcpy (hdr.ar_fmag, ARFMAG, 2);
- /* Write the ar header for this item and the number of symbols */
- if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
- != sizeof (struct ar_hdr))
- return false;
- bfd_putb64 ((bfd_vma) symbol_count, buf);
- if (bfd_bwrite (buf, 8, arch) != 8)
- return false;
- /* Two passes, first write the file offsets for each symbol -
- remembering that each offset is on a two byte boundary. */
- /* Write out the file offset for the file associated with each
- symbol, and remember to keep the offsets padded out. */
- count = 0;
- for (current = arch->archive_head;
- current != NULL && count < symbol_count;
- current = current->archive_next)
- {
- /* For each symbol which is used defined in this object, write out
- the object file's address in the archive. */
- for (;
- count < symbol_count && map[count].u.abfd == current;
- count++)
- {
- bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
- if (bfd_bwrite (buf, 8, arch) != 8)
- return false;
- }
- /* Add size of this archive entry */
- archive_member_file_ptr += sizeof (struct ar_hdr);
- if (! bfd_is_thin_archive (arch))
- archive_member_file_ptr += arelt_size (current);
- /* remember about the even alignment */
- archive_member_file_ptr += archive_member_file_ptr % 2;
- }
- /* now write the strings themselves */
- for (count = 0; count < symbol_count; count++)
- {
- size_t len = strlen (*map[count].name) + 1;
- if (bfd_bwrite (*map[count].name, len, arch) != len)
- return false;
- }
- /* The spec says that this should be padded to an 8 byte boundary.
- However, the Irix 6.2 tools do not appear to do this. */
- while (padding != 0)
- {
- if (bfd_bwrite ("", 1, arch) != 1)
- return false;
- --padding;
- }
- return true;
- }
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