elf_memory.c revision 4484
14484Sbinkertn@umich.edu/*- 24484Sbinkertn@umich.edu * Copyright (c) 2006 Joseph Koshy 34484Sbinkertn@umich.edu * All rights reserved. 44484Sbinkertn@umich.edu * 54484Sbinkertn@umich.edu * Redistribution and use in source and binary forms, with or without 64484Sbinkertn@umich.edu * modification, are permitted provided that the following conditions 74484Sbinkertn@umich.edu * are met: 84484Sbinkertn@umich.edu * 1. Redistributions of source code must retain the above copyright 94484Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer. 104484Sbinkertn@umich.edu * 2. Redistributions in binary form must reproduce the above copyright 114484Sbinkertn@umich.edu * notice, this list of conditions and the following disclaimer in the 124484Sbinkertn@umich.edu * documentation and/or other materials provided with the distribution. 134484Sbinkertn@umich.edu * 144484Sbinkertn@umich.edu * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 154484Sbinkertn@umich.edu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 164484Sbinkertn@umich.edu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 174484Sbinkertn@umich.edu * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 184484Sbinkertn@umich.edu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 194484Sbinkertn@umich.edu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 204484Sbinkertn@umich.edu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 214484Sbinkertn@umich.edu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 224484Sbinkertn@umich.edu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 234484Sbinkertn@umich.edu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 244484Sbinkertn@umich.edu * SUCH DAMAGE. 254484Sbinkertn@umich.edu */ 264484Sbinkertn@umich.edu 274484Sbinkertn@umich.edu 284484Sbinkertn@umich.edu#include <ar.h> 294484Sbinkertn@umich.edu#include "libelf.h" 304484Sbinkertn@umich.edu#include <string.h> 314484Sbinkertn@umich.edu 324484Sbinkertn@umich.edu#include "_libelf.h" 334484Sbinkertn@umich.edu 344484Sbinkertn@umich.eduElf * 354484Sbinkertn@umich.eduelf_memory(char *image, size_t sz) 364484Sbinkertn@umich.edu{ 374484Sbinkertn@umich.edu Elf *e; 384484Sbinkertn@umich.edu 394484Sbinkertn@umich.edu if (LIBELF_PRIVATE(version) == EV_NONE) { 404484Sbinkertn@umich.edu LIBELF_SET_ERROR(SEQUENCE, 0); 414484Sbinkertn@umich.edu return (NULL); 424484Sbinkertn@umich.edu } 434484Sbinkertn@umich.edu 444484Sbinkertn@umich.edu if (image == NULL || sz == 0) { 454484Sbinkertn@umich.edu LIBELF_SET_ERROR(ARGUMENT, 0); 464484Sbinkertn@umich.edu return (NULL); 474484Sbinkertn@umich.edu } 484484Sbinkertn@umich.edu 494484Sbinkertn@umich.edu if ((e = _libelf_allocate_elf()) == NULL) 504484Sbinkertn@umich.edu return (NULL); 514484Sbinkertn@umich.edu 524484Sbinkertn@umich.edu e->e_cmd = ELF_C_READ; 534484Sbinkertn@umich.edu e->e_rawfile = image; 544484Sbinkertn@umich.edu e->e_rawsize = sz; 554484Sbinkertn@umich.edu 564484Sbinkertn@umich.edu#undef LIBELF_IS_ELF 574484Sbinkertn@umich.edu#define LIBELF_IS_ELF(P) ((P)[EI_MAG0] == ELFMAG0 && \ 584484Sbinkertn@umich.edu (P)[EI_MAG1] == ELFMAG1 && (P)[EI_MAG2] == ELFMAG2 && \ 594484Sbinkertn@umich.edu (P)[EI_MAG3] == ELFMAG3) 604484Sbinkertn@umich.edu 614484Sbinkertn@umich.edu if (sz > EI_NIDENT && LIBELF_IS_ELF(image)) { 624484Sbinkertn@umich.edu _libelf_init_elf(e, ELF_K_ELF); 634484Sbinkertn@umich.edu e->e_class = image[EI_CLASS]; 644484Sbinkertn@umich.edu e->e_byteorder = image[EI_DATA]; 654484Sbinkertn@umich.edu e->e_version = image[EI_VERSION]; 664484Sbinkertn@umich.edu 674484Sbinkertn@umich.edu if (e->e_version > EV_CURRENT) { 684484Sbinkertn@umich.edu e = _libelf_release_elf(e); 694484Sbinkertn@umich.edu LIBELF_SET_ERROR(VERSION, 0); 704484Sbinkertn@umich.edu return (NULL); 714484Sbinkertn@umich.edu } 724484Sbinkertn@umich.edu 734484Sbinkertn@umich.edu if ((e->e_byteorder != ELFDATA2LSB && e->e_byteorder != 744484Sbinkertn@umich.edu ELFDATA2MSB) || (e->e_class != ELFCLASS32 && e->e_class != 754484Sbinkertn@umich.edu ELFCLASS64)) { 764484Sbinkertn@umich.edu e = _libelf_release_elf(e); 774484Sbinkertn@umich.edu LIBELF_SET_ERROR(HEADER, 0); 784484Sbinkertn@umich.edu return (NULL); 794484Sbinkertn@umich.edu } 804484Sbinkertn@umich.edu 814484Sbinkertn@umich.edu } else if (sz >= SARMAG && 824484Sbinkertn@umich.edu strncmp(image, ARMAG, (size_t) SARMAG) == 0) { 834484Sbinkertn@umich.edu _libelf_init_elf(e, ELF_K_AR); 844484Sbinkertn@umich.edu e = _libelf_ar_open(e); 854484Sbinkertn@umich.edu } else 864484Sbinkertn@umich.edu _libelf_init_elf(e, ELF_K_NONE); 874484Sbinkertn@umich.edu 884484Sbinkertn@umich.edu return (e); 894484Sbinkertn@umich.edu} 90