1 /* $NetBSD: libelf_elfmachine.c,v 1.2 2024/03/03 17:37:34 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 Joseph Koshy 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, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #if HAVE_NBTOOL_CONFIG_H 30 # include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 35 #include <assert.h> 36 #include <libelf.h> 37 38 #include "_libelf.h" 39 40 __RCSID("$NetBSD: libelf_elfmachine.c,v 1.2 2024/03/03 17:37:34 christos Exp $"); 41 ELFTC_VCSID("Id: libelf_elfmachine.c 3977 2022-05-01 06:45:34Z jkoshy"); 42 43 /* 44 * A convenience helper that returns the ELF machine architecture for 45 * a ELF descriptor. 46 */ 47 int 48 _libelf_elfmachine(Elf *e) 49 { 50 Elf32_Ehdr *eh32; 51 Elf64_Ehdr *eh64; 52 53 if (!e) 54 return EM_NONE; 55 56 assert(e->e_kind == ELF_K_ELF); 57 assert(e->e_class != ELFCLASSNONE); 58 59 eh32 = NULL; 60 eh64 = NULL; 61 62 switch (e->e_class) { 63 case ELFCLASS32: 64 eh32 = e->e_u.e_elf.e_ehdr.e_ehdr32; 65 return eh32 ? eh32->e_machine : EM_NONE; 66 case ELFCLASS64: 67 eh64 = e->e_u.e_elf.e_ehdr.e_ehdr64; 68 return eh64 ? eh64->e_machine : EM_NONE; 69 } 70 71 return (EM_NONE); 72 } 73