1*2de3b87aSKai Wang /*- 2*2de3b87aSKai Wang * Copyright (c) 2006,2008 Joseph Koshy 3*2de3b87aSKai Wang * All rights reserved. 4*2de3b87aSKai Wang * 5*2de3b87aSKai Wang * Redistribution and use in source and binary forms, with or without 6*2de3b87aSKai Wang * modification, are permitted provided that the following conditions 7*2de3b87aSKai Wang * are met: 8*2de3b87aSKai Wang * 1. Redistributions of source code must retain the above copyright 9*2de3b87aSKai Wang * notice, this list of conditions and the following disclaimer. 10*2de3b87aSKai Wang * 2. Redistributions in binary form must reproduce the above copyright 11*2de3b87aSKai Wang * notice, this list of conditions and the following disclaimer in the 12*2de3b87aSKai Wang * documentation and/or other materials provided with the distribution. 13*2de3b87aSKai Wang * 14*2de3b87aSKai Wang * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*2de3b87aSKai Wang * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*2de3b87aSKai Wang * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*2de3b87aSKai Wang * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*2de3b87aSKai Wang * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*2de3b87aSKai Wang * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*2de3b87aSKai Wang * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*2de3b87aSKai Wang * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*2de3b87aSKai Wang * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*2de3b87aSKai Wang * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*2de3b87aSKai Wang * SUCH DAMAGE. 25*2de3b87aSKai Wang */ 26*2de3b87aSKai Wang 27*2de3b87aSKai Wang #include <sys/cdefs.h> 28*2de3b87aSKai Wang 29*2de3b87aSKai Wang #include <ar.h> 30*2de3b87aSKai Wang #include <assert.h> 31*2de3b87aSKai Wang #include <libelf.h> 32*2de3b87aSKai Wang 33*2de3b87aSKai Wang #include "_libelf.h" 34*2de3b87aSKai Wang 35*2de3b87aSKai Wang ELFTC_VCSID("$Id: elf_next.c 2225 2011-11-26 18:55:54Z jkoshy $"); 36*2de3b87aSKai Wang 37*2de3b87aSKai Wang Elf_Cmd 38*2de3b87aSKai Wang elf_next(Elf *e) 39*2de3b87aSKai Wang { 40*2de3b87aSKai Wang off_t next; 41*2de3b87aSKai Wang Elf *parent; 42*2de3b87aSKai Wang 43*2de3b87aSKai Wang if (e == NULL) 44*2de3b87aSKai Wang return (ELF_C_NULL); 45*2de3b87aSKai Wang 46*2de3b87aSKai Wang if ((parent = e->e_parent) == NULL) { 47*2de3b87aSKai Wang LIBELF_SET_ERROR(ARGUMENT, 0); 48*2de3b87aSKai Wang return (ELF_C_NULL); 49*2de3b87aSKai Wang } 50*2de3b87aSKai Wang 51*2de3b87aSKai Wang assert (parent->e_kind == ELF_K_AR); 52*2de3b87aSKai Wang assert (parent->e_cmd == ELF_C_READ); 53*2de3b87aSKai Wang assert(e->e_rawfile > parent->e_rawfile); 54*2de3b87aSKai Wang 55*2de3b87aSKai Wang next = e->e_rawfile - parent->e_rawfile + e->e_rawsize; 56*2de3b87aSKai Wang next = (next + 1) & ~1; /* round up to an even boundary */ 57*2de3b87aSKai Wang 58*2de3b87aSKai Wang parent->e_u.e_ar.e_next = (next >= (off_t) parent->e_rawsize) ? 59*2de3b87aSKai Wang (off_t) 0 : next; 60*2de3b87aSKai Wang 61*2de3b87aSKai Wang return (ELF_C_READ); 62*2de3b87aSKai Wang } 63