1 /* $NetBSD: elfclass.h,v 1.1.1.6 2015/01/02 20:34:27 christos Exp $ */ 2 3 /* 4 * Copyright (c) Christos Zoulas 2008. 5 * All Rights Reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice immediately at the beginning of the file, without modification, 12 * this list of conditions, and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 if (nbytes <= sizeof(elfhdr)) 30 return 0; 31 32 u.l = 1; 33 (void)memcpy(&elfhdr, buf, sizeof elfhdr); 34 swap = (u.c[sizeof(int32_t) - 1] + 1) != elfhdr.e_ident[EI_DATA]; 35 36 type = elf_getu16(swap, elfhdr.e_type); 37 notecount = ms->elf_notes_max; 38 switch (type) { 39 #ifdef ELFCORE 40 case ET_CORE: 41 phnum = elf_getu16(swap, elfhdr.e_phnum); 42 if (phnum > ms->elf_phnum_max) 43 return toomany(ms, "program headers", phnum); 44 flags |= FLAGS_IS_CORE; 45 if (dophn_core(ms, clazz, swap, fd, 46 (off_t)elf_getu(swap, elfhdr.e_phoff), phnum, 47 (size_t)elf_getu16(swap, elfhdr.e_phentsize), 48 fsize, &flags, ¬ecount) == -1) 49 return -1; 50 break; 51 #endif 52 case ET_EXEC: 53 case ET_DYN: 54 phnum = elf_getu16(swap, elfhdr.e_phnum); 55 if (phnum > ms->elf_phnum_max) 56 return toomany(ms, "program", phnum); 57 shnum = elf_getu16(swap, elfhdr.e_shnum); 58 if (shnum > ms->elf_shnum_max) 59 return toomany(ms, "section", shnum); 60 if (dophn_exec(ms, clazz, swap, fd, 61 (off_t)elf_getu(swap, elfhdr.e_phoff), phnum, 62 (size_t)elf_getu16(swap, elfhdr.e_phentsize), 63 fsize, shnum, &flags, ¬ecount) == -1) 64 return -1; 65 /*FALLTHROUGH*/ 66 case ET_REL: 67 shnum = elf_getu16(swap, elfhdr.e_shnum); 68 if (shnum > ms->elf_shnum_max) 69 return toomany(ms, "section headers", shnum); 70 if (doshn(ms, clazz, swap, fd, 71 (off_t)elf_getu(swap, elfhdr.e_shoff), shnum, 72 (size_t)elf_getu16(swap, elfhdr.e_shentsize), 73 fsize, elf_getu16(swap, elfhdr.e_machine), 74 (int)elf_getu16(swap, elfhdr.e_shstrndx), 75 &flags, ¬ecount) == -1) 76 return -1; 77 break; 78 79 default: 80 break; 81 } 82 if (notecount == 0) 83 return toomany(ms, "notes", ms->elf_notes_max); 84 return 1; 85