12de3b87aSKai Wang /*- 22de3b87aSKai Wang * Copyright (c) 2011 Joseph Koshy 32de3b87aSKai Wang * All rights reserved. 42de3b87aSKai Wang * 52de3b87aSKai Wang * Redistribution and use in source and binary forms, with or without 62de3b87aSKai Wang * modification, are permitted provided that the following conditions 72de3b87aSKai Wang * are met: 82de3b87aSKai Wang * 1. Redistributions of source code must retain the above copyright 92de3b87aSKai Wang * notice, this list of conditions and the following disclaimer. 102de3b87aSKai Wang * 2. Redistributions in binary form must reproduce the above copyright 112de3b87aSKai Wang * notice, this list of conditions and the following disclaimer in the 122de3b87aSKai Wang * documentation and/or other materials provided with the distribution. 132de3b87aSKai Wang * 142de3b87aSKai Wang * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 152de3b87aSKai Wang * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 162de3b87aSKai Wang * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 172de3b87aSKai Wang * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 182de3b87aSKai Wang * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 192de3b87aSKai Wang * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 202de3b87aSKai Wang * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 212de3b87aSKai Wang * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 222de3b87aSKai Wang * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 232de3b87aSKai Wang * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 242de3b87aSKai Wang * SUCH DAMAGE. 252de3b87aSKai Wang */ 262de3b87aSKai Wang 272de3b87aSKai Wang #include <ar.h> 282de3b87aSKai Wang #include <assert.h> 292de3b87aSKai Wang #include <string.h> 302de3b87aSKai Wang #include <libelf.h> 312de3b87aSKai Wang 322de3b87aSKai Wang #include "_libelf.h" 332de3b87aSKai Wang 34*cf781b2eSEd Maste ELFTC_VCSID("$Id: libelf_memory.c 3013 2014-03-23 06:16:59Z jkoshy $"); 352de3b87aSKai Wang 362de3b87aSKai Wang /* 372de3b87aSKai Wang * Create an ELF descriptor for a memory image, optionally reporting 382de3b87aSKai Wang * parse errors. 392de3b87aSKai Wang */ 402de3b87aSKai Wang 412de3b87aSKai Wang Elf * 42*cf781b2eSEd Maste _libelf_memory(unsigned char *image, size_t sz, int reporterror) 432de3b87aSKai Wang { 442de3b87aSKai Wang Elf *e; 452de3b87aSKai Wang int e_class; 462de3b87aSKai Wang enum Elf_Error error; 472de3b87aSKai Wang unsigned int e_byteorder, e_version; 482de3b87aSKai Wang 492de3b87aSKai Wang assert(image != NULL); 502de3b87aSKai Wang assert(sz > 0); 512de3b87aSKai Wang 522de3b87aSKai Wang if ((e = _libelf_allocate_elf()) == NULL) 532de3b87aSKai Wang return (NULL); 542de3b87aSKai Wang 552de3b87aSKai Wang e->e_cmd = ELF_C_READ; 562de3b87aSKai Wang e->e_rawfile = image; 572de3b87aSKai Wang e->e_rawsize = sz; 582de3b87aSKai Wang 592de3b87aSKai Wang #undef LIBELF_IS_ELF 602de3b87aSKai Wang #define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \ 612de3b87aSKai Wang (P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \ 622de3b87aSKai Wang (P)[EI_MAG3] == ELFMAG3) 632de3b87aSKai Wang 642de3b87aSKai Wang if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) { 652de3b87aSKai Wang e_byteorder = image[EI_DATA]; 662de3b87aSKai Wang e_class = image[EI_CLASS]; 672de3b87aSKai Wang e_version = image[EI_VERSION]; 682de3b87aSKai Wang 692de3b87aSKai Wang error = ELF_E_NONE; 702de3b87aSKai Wang 712de3b87aSKai Wang if (e_version > EV_CURRENT) 722de3b87aSKai Wang error = ELF_E_VERSION; 732de3b87aSKai Wang else if ((e_byteorder != ELFDATA2LSB && e_byteorder != 742de3b87aSKai Wang ELFDATA2MSB) || (e_class != ELFCLASS32 && e_class != 752de3b87aSKai Wang ELFCLASS64)) 762de3b87aSKai Wang error = ELF_E_HEADER; 772de3b87aSKai Wang 782de3b87aSKai Wang if (error != ELF_E_NONE) { 792de3b87aSKai Wang if (reporterror) { 802de3b87aSKai Wang LIBELF_PRIVATE(error) = LIBELF_ERROR(error, 0); 812de3b87aSKai Wang (void) _libelf_release_elf(e); 822de3b87aSKai Wang return (NULL); 832de3b87aSKai Wang } 842de3b87aSKai Wang } else { 852de3b87aSKai Wang _libelf_init_elf(e, ELF_K_ELF); 862de3b87aSKai Wang 872de3b87aSKai Wang e->e_byteorder = e_byteorder; 882de3b87aSKai Wang e->e_class = e_class; 892de3b87aSKai Wang e->e_version = e_version; 902de3b87aSKai Wang } 912de3b87aSKai Wang } else if (sz >= SARMAG && 92*cf781b2eSEd Maste strncmp((const char *) image, ARMAG, (size_t) SARMAG) == 0) 932de3b87aSKai Wang return (_libelf_ar_open(e, reporterror)); 942de3b87aSKai Wang 952de3b87aSKai Wang return (e); 962de3b87aSKai Wang } 97