1*2de3b87aSKai Wang /*- 2*2de3b87aSKai Wang * Copyright (c) 2011 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 <ar.h> 28*2de3b87aSKai Wang #include <assert.h> 29*2de3b87aSKai Wang #include <string.h> 30*2de3b87aSKai Wang #include <libelf.h> 31*2de3b87aSKai Wang 32*2de3b87aSKai Wang #include "_libelf.h" 33*2de3b87aSKai Wang 34*2de3b87aSKai Wang ELFTC_VCSID("$Id: libelf_memory.c 2368 2011-12-29 06:34:28Z jkoshy $"); 35*2de3b87aSKai Wang 36*2de3b87aSKai Wang /* 37*2de3b87aSKai Wang * Create an ELF descriptor for a memory image, optionally reporting 38*2de3b87aSKai Wang * parse errors. 39*2de3b87aSKai Wang */ 40*2de3b87aSKai Wang 41*2de3b87aSKai Wang Elf * 42*2de3b87aSKai Wang _libelf_memory(char *image, size_t sz, int reporterror) 43*2de3b87aSKai Wang { 44*2de3b87aSKai Wang Elf *e; 45*2de3b87aSKai Wang int e_class; 46*2de3b87aSKai Wang enum Elf_Error error; 47*2de3b87aSKai Wang unsigned int e_byteorder, e_version; 48*2de3b87aSKai Wang 49*2de3b87aSKai Wang assert(image != NULL); 50*2de3b87aSKai Wang assert(sz > 0); 51*2de3b87aSKai Wang 52*2de3b87aSKai Wang if ((e = _libelf_allocate_elf()) == NULL) 53*2de3b87aSKai Wang return (NULL); 54*2de3b87aSKai Wang 55*2de3b87aSKai Wang e->e_cmd = ELF_C_READ; 56*2de3b87aSKai Wang e->e_rawfile = image; 57*2de3b87aSKai Wang e->e_rawsize = sz; 58*2de3b87aSKai Wang 59*2de3b87aSKai Wang #undef LIBELF_IS_ELF 60*2de3b87aSKai Wang #define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \ 61*2de3b87aSKai Wang (P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \ 62*2de3b87aSKai Wang (P)[EI_MAG3] == ELFMAG3) 63*2de3b87aSKai Wang 64*2de3b87aSKai Wang if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) { 65*2de3b87aSKai Wang e_byteorder = image[EI_DATA]; 66*2de3b87aSKai Wang e_class = image[EI_CLASS]; 67*2de3b87aSKai Wang e_version = image[EI_VERSION]; 68*2de3b87aSKai Wang 69*2de3b87aSKai Wang error = ELF_E_NONE; 70*2de3b87aSKai Wang 71*2de3b87aSKai Wang if (e_version > EV_CURRENT) 72*2de3b87aSKai Wang error = ELF_E_VERSION; 73*2de3b87aSKai Wang else if ((e_byteorder != ELFDATA2LSB && e_byteorder != 74*2de3b87aSKai Wang ELFDATA2MSB) || (e_class != ELFCLASS32 && e_class != 75*2de3b87aSKai Wang ELFCLASS64)) 76*2de3b87aSKai Wang error = ELF_E_HEADER; 77*2de3b87aSKai Wang 78*2de3b87aSKai Wang if (error != ELF_E_NONE) { 79*2de3b87aSKai Wang if (reporterror) { 80*2de3b87aSKai Wang LIBELF_PRIVATE(error) = LIBELF_ERROR(error, 0); 81*2de3b87aSKai Wang (void) _libelf_release_elf(e); 82*2de3b87aSKai Wang return (NULL); 83*2de3b87aSKai Wang } 84*2de3b87aSKai Wang } else { 85*2de3b87aSKai Wang _libelf_init_elf(e, ELF_K_ELF); 86*2de3b87aSKai Wang 87*2de3b87aSKai Wang e->e_byteorder = e_byteorder; 88*2de3b87aSKai Wang e->e_class = e_class; 89*2de3b87aSKai Wang e->e_version = e_version; 90*2de3b87aSKai Wang } 91*2de3b87aSKai Wang } else if (sz >= SARMAG && 92*2de3b87aSKai Wang strncmp(image, ARMAG, (size_t) SARMAG) == 0) 93*2de3b87aSKai Wang return (_libelf_ar_open(e, reporterror)); 94*2de3b87aSKai Wang 95*2de3b87aSKai Wang return (e); 96*2de3b87aSKai Wang } 97