1164190Sjkoshy/*- 2164190Sjkoshy * Copyright (c) 2006 Joseph Koshy 3164190Sjkoshy * All rights reserved. 4164190Sjkoshy * 5164190Sjkoshy * Redistribution and use in source and binary forms, with or without 6164190Sjkoshy * modification, are permitted provided that the following conditions 7164190Sjkoshy * are met: 8164190Sjkoshy * 1. Redistributions of source code must retain the above copyright 9164190Sjkoshy * notice, this list of conditions and the following disclaimer. 10164190Sjkoshy * 2. Redistributions in binary form must reproduce the above copyright 11164190Sjkoshy * notice, this list of conditions and the following disclaimer in the 12164190Sjkoshy * documentation and/or other materials provided with the distribution. 13164190Sjkoshy * 14164190Sjkoshy * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15164190Sjkoshy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16164190Sjkoshy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17164190Sjkoshy * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18164190Sjkoshy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19164190Sjkoshy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20164190Sjkoshy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21164190Sjkoshy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22164190Sjkoshy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23164190Sjkoshy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24164190Sjkoshy * SUCH DAMAGE. 25164190Sjkoshy */ 26164190Sjkoshy 27164190Sjkoshy#include <sys/cdefs.h> 28164190Sjkoshy__FBSDID("$FreeBSD$"); 29164190Sjkoshy 30164190Sjkoshy#include <ar.h> 31164190Sjkoshy#include <assert.h> 32164190Sjkoshy#include <libelf.h> 33164190Sjkoshy 34164190Sjkoshy#include "_libelf.h" 35164190Sjkoshy 36164190SjkoshyElf_Cmd 37164190Sjkoshyelf_next(Elf *e) 38164190Sjkoshy{ 39164190Sjkoshy off_t next; 40164190Sjkoshy Elf *parent; 41164190Sjkoshy 42164190Sjkoshy if (e == NULL) 43164190Sjkoshy return (ELF_C_NULL); 44164190Sjkoshy 45164190Sjkoshy if ((parent = e->e_parent) == NULL) { 46164190Sjkoshy LIBELF_SET_ERROR(ARGUMENT, 0); 47164190Sjkoshy return (ELF_C_NULL); 48164190Sjkoshy } 49164190Sjkoshy 50164190Sjkoshy assert (parent->e_kind == ELF_K_AR); 51164190Sjkoshy assert (parent->e_cmd == ELF_C_READ); 52164190Sjkoshy assert((uintptr_t) e->e_rawfile % 2 == 0); 53164190Sjkoshy assert(e->e_rawfile > parent->e_rawfile); 54164190Sjkoshy 55164190Sjkoshy next = e->e_rawfile - parent->e_rawfile + e->e_rawsize; 56164190Sjkoshy next = (next + 1) & ~1; /* round up to an even boundary */ 57164190Sjkoshy 58164190Sjkoshy parent->e_u.e_ar.e_next = (next >= (off_t) parent->e_rawsize) ? (off_t) 0 : next; 59164190Sjkoshy 60164190Sjkoshy return (ELF_C_READ); 61164190Sjkoshy} 62