1 /* 2 * Copyright (c) Christos Zoulas 2008. 3 * All Rights Reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice immediately at the beginning of the file, without modification, 10 * this list of conditions, and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 if (nbytes <= sizeof(elfhdr)) 28 return 0; 29 30 u.l = 1; 31 (void)memcpy(&elfhdr, buf, sizeof elfhdr); 32 swap = (u.c[sizeof(int32_t) - 1] + 1) != elfhdr.e_ident[EI_DATA]; 33 34 type = elf_getu16(swap, elfhdr.e_type); 35 switch (type) { 36 #ifdef ELFCORE 37 case ET_CORE: 38 flags |= FLAGS_IS_CORE; 39 if (dophn_core(ms, clazz, swap, fd, 40 (off_t)elf_getu(swap, elfhdr.e_phoff), 41 elf_getu16(swap, elfhdr.e_phnum), 42 (size_t)elf_getu16(swap, elfhdr.e_phentsize), 43 fsize, &flags) == -1) 44 return -1; 45 break; 46 #endif 47 case ET_EXEC: 48 case ET_DYN: 49 if (dophn_exec(ms, clazz, swap, fd, 50 (off_t)elf_getu(swap, elfhdr.e_phoff), 51 elf_getu16(swap, elfhdr.e_phnum), 52 (size_t)elf_getu16(swap, elfhdr.e_phentsize), 53 fsize, &flags, elf_getu16(swap, elfhdr.e_shnum)) 54 == -1) 55 return -1; 56 /*FALLTHROUGH*/ 57 case ET_REL: 58 if (doshn(ms, clazz, swap, fd, 59 (off_t)elf_getu(swap, elfhdr.e_shoff), 60 elf_getu16(swap, elfhdr.e_shnum), 61 (size_t)elf_getu16(swap, elfhdr.e_shentsize), 62 fsize, &flags, elf_getu16(swap, elfhdr.e_machine), 63 (int)elf_getu16(swap, elfhdr.e_shstrndx)) == -1) 64 return -1; 65 break; 66 67 default: 68 break; 69 } 70 return 1; 71