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      1 /*	$NetBSD: libelf_elfmachine.c,v 1.3 2025/12/25 18:58:13 jkoshy 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 ELFTC_VCSID("Id: libelf_elfmachine.c 3977 2022-05-01 06:45:34Z jkoshy");
     41 
     42 __RCSID("$NetBSD: libelf_elfmachine.c,v 1.3 2025/12/25 18:58:13 jkoshy Exp $");
     43 
     44 /*
     45  * A convenience helper that returns the ELF machine architecture for
     46  * a ELF descriptor.
     47  */
     48 int
     49 _libelf_elfmachine(Elf *e)
     50 {
     51 	Elf32_Ehdr *eh32;
     52 	Elf64_Ehdr *eh64;
     53 
     54 	if (!e)
     55 		return EM_NONE;
     56 
     57 	assert(e->e_kind == ELF_K_ELF);
     58 	assert(e->e_class != ELFCLASSNONE);
     59 
     60 	eh32 = NULL;
     61 	eh64 = NULL;
     62 
     63 	switch (e->e_class) {
     64 	case ELFCLASS32:
     65 		eh32 = e->e_u.e_elf.e_ehdr.e_ehdr32;
     66 		return eh32 ? eh32->e_machine : EM_NONE;
     67 	case ELFCLASS64:
     68 		eh64 = e->e_u.e_elf.e_ehdr.e_ehdr64;
     69 		return eh64 ? eh64->e_machine : EM_NONE;
     70 	}
     71 
     72 	return (EM_NONE);
     73 }
     74