/* $NetBSD: elf_rand.c,v 1.1.1.2 2009/12/29 16:58:08 thorpej Exp $ */ /*- * Copyright (c) 2006 Joseph Koshy * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include /* __FBSDID("$FreeBSD: src/lib/libelf/elf_rand.c,v 1.1.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $"); */ #include #include #include "_libelf.h" off_t elf_rand(Elf *ar, off_t offset) { struct ar_hdr *arh; if (ar == NULL || ar->e_kind != ELF_K_AR || (offset & 1) || offset < SARMAG || offset + sizeof(struct ar_hdr) >= ar->e_rawsize) { LIBELF_SET_ERROR(ARGUMENT, 0); return 0; } arh = (struct ar_hdr *) (ar->e_rawfile + offset); /* a too simple sanity check */ if (arh->ar_fmag[0] != '`' || arh->ar_fmag[1] != '\n') { LIBELF_SET_ERROR(ARCHIVE, 0); return 0; } ar->e_u.e_ar.e_next = offset; return (offset); }