1441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Retrieve uninterpreted chunk of the file contents. 2441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Copyright (C) 2002 Red Hat, Inc. 3441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. 4441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 5441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project This program is free software; you can redistribute it and/or modify 6441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project it under the terms of the GNU General Public License as published by 7441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project the Free Software Foundation, version 2. 8441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 9441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project This program is distributed in the hope that it will be useful, 10441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project but WITHOUT ANY WARRANTY; without even the implied warranty of 11441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project GNU General Public License for more details. 13441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 14441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project You should have received a copy of the GNU General Public License 15441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project along with this program; if not, write to the Free Software Foundation, 16441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 18441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifdef HAVE_CONFIG_H 19441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# include <config.h> 20441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 21441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 22441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <libelf.h> 23441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <stddef.h> 24441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <stdlib.h> 25441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <unistd.h> 26441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 27441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include "libelfP.h" 28441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 29441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 30441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectchar * 31441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectgelf_rawchunk (elf, offset, size) 32441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Elf *elf; 33441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project GElf_Off offset; 34441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project GElf_Word size; 35441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 36441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (elf == NULL) 37441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 38441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* No valid descriptor. */ 39441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libelf_seterrno (ELF_E_INVALID_HANDLE); 40441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 41441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 42441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 43441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (offset >= elf->maximum_size 44441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project || offset + size >= elf->maximum_size 45441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project || offset + size < offset) 46441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 47441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Invalid request. */ 48441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libelf_seterrno (ELF_E_INVALID_OP); 49441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 50441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 51441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 52441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* If the file is mmap'ed return an appropriate pointer. */ 53441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (elf->map_address != NULL) 54441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return (char *) elf->map_address + elf->start_offset + offset; 55441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 56441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We allocate the memory and read the data from the file. */ 57441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char *result = (char *) malloc (size); 58441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (result == NULL) 59441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libelf_seterrno (ELF_E_NOMEM); 60441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 61441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Read the file content. */ 62441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if ((size_t) pread (elf->fildes, result, size, elf->start_offset + offset) 63441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project != size) 64441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 65441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Something went wrong. */ 66441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libelf_seterrno (ELF_E_READ_ERROR); 67441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (result); 68441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 69441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 70441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return result; 71441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 72