1 /* $NetBSD: elf_errmsg.c,v 1.4 2022/05/01 19:41:35 jkoshy Exp $ */
2
3 /*-
4 * Copyright (c) 2006,2008,2011 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 #include <libelf.h>
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "_libelf.h"
34
35 __RCSID("$NetBSD: elf_errmsg.c,v 1.4 2022/05/01 19:41:35 jkoshy Exp $");
36 ELFTC_VCSID("Id: elf_errmsg.c 3174 2015-03-27 17:13:41Z emaste");
37
38 /*
39 * Retrieve a human readable translation for an error message.
40 */
41
42 static const char *_libelf_errors[] = {
43 #define DEFINE_ERROR(N,S) [ELF_E_##N] = S
44 DEFINE_ERROR(NONE, "No Error"),
45 DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"),
46 DEFINE_ERROR(ARGUMENT, "Invalid argument"),
47 DEFINE_ERROR(CLASS, "ELF class mismatch"),
48 DEFINE_ERROR(DATA, "Invalid data buffer descriptor"),
49 DEFINE_ERROR(HEADER, "Missing or malformed ELF header"),
50 DEFINE_ERROR(IO, "I/O error"),
51 DEFINE_ERROR(LAYOUT, "Layout constraint violation"),
52 DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"),
53 DEFINE_ERROR(RANGE, "Value out of range of target"),
54 DEFINE_ERROR(RESOURCE, "Resource exhaustion"),
55 DEFINE_ERROR(SECTION, "Invalid section descriptor"),
56 DEFINE_ERROR(SEQUENCE, "API calls out of sequence"),
57 DEFINE_ERROR(UNIMPL, "Unimplemented feature"),
58 DEFINE_ERROR(VERSION, "Unknown ELF API version"),
59 DEFINE_ERROR(NUM, "Unknown error")
60 #undef DEFINE_ERROR
61 };
62
63 const char *
elf_errmsg(int error)64 elf_errmsg(int error)
65 {
66 int oserr;
67
68 if (error == ELF_E_NONE &&
69 (error = LIBELF_PRIVATE(error)) == 0)
70 return NULL;
71 else if (error == -1)
72 error = LIBELF_PRIVATE(error);
73
74 oserr = error >> LIBELF_OS_ERROR_SHIFT;
75 error &= LIBELF_ELF_ERROR_MASK;
76
77 if (error < ELF_E_NONE || error >= ELF_E_NUM)
78 return _libelf_errors[ELF_E_NUM];
79 if (oserr) {
80 (void) snprintf((char *) LIBELF_PRIVATE(msg),
81 sizeof(LIBELF_PRIVATE(msg)), "%s: %s",
82 _libelf_errors[error], strerror(oserr));
83 return (const char *)&LIBELF_PRIVATE(msg);
84 }
85 return _libelf_errors[error];
86 }
87