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/* Support for 64-bit archives.
Copyright (C) 1996-2023 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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