1*a1b5ec25Sjsg /*-
2*a1b5ec25Sjsg * Copyright (c) 2006,2008,2011 Joseph Koshy
3*a1b5ec25Sjsg * All rights reserved.
4*a1b5ec25Sjsg *
5*a1b5ec25Sjsg * Redistribution and use in source and binary forms, with or without
6*a1b5ec25Sjsg * modification, are permitted provided that the following conditions
7*a1b5ec25Sjsg * are met:
8*a1b5ec25Sjsg * 1. Redistributions of source code must retain the above copyright
9*a1b5ec25Sjsg * notice, this list of conditions and the following disclaimer.
10*a1b5ec25Sjsg * 2. Redistributions in binary form must reproduce the above copyright
11*a1b5ec25Sjsg * notice, this list of conditions and the following disclaimer in the
12*a1b5ec25Sjsg * documentation and/or other materials provided with the distribution.
13*a1b5ec25Sjsg *
14*a1b5ec25Sjsg * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*a1b5ec25Sjsg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*a1b5ec25Sjsg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*a1b5ec25Sjsg * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*a1b5ec25Sjsg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*a1b5ec25Sjsg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*a1b5ec25Sjsg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*a1b5ec25Sjsg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*a1b5ec25Sjsg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*a1b5ec25Sjsg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*a1b5ec25Sjsg * SUCH DAMAGE.
25*a1b5ec25Sjsg */
26*a1b5ec25Sjsg
27*a1b5ec25Sjsg #include <libelf.h>
28*a1b5ec25Sjsg #include <stdio.h>
29*a1b5ec25Sjsg #include <string.h>
30*a1b5ec25Sjsg
31*a1b5ec25Sjsg #include "_libelf.h"
32*a1b5ec25Sjsg
33*a1b5ec25Sjsg ELFTC_VCSID("$Id: elf_errmsg.c,v 1.1 2019/02/01 05:27:37 jsg Exp $");
34*a1b5ec25Sjsg
35*a1b5ec25Sjsg /*
36*a1b5ec25Sjsg * Retrieve a human readable translation for an error message.
37*a1b5ec25Sjsg */
38*a1b5ec25Sjsg
39*a1b5ec25Sjsg static const char *_libelf_errors[] = {
40*a1b5ec25Sjsg #define DEFINE_ERROR(N,S) [ELF_E_##N] = S
41*a1b5ec25Sjsg DEFINE_ERROR(NONE, "No Error"),
42*a1b5ec25Sjsg DEFINE_ERROR(ARCHIVE, "Malformed ar(1) archive"),
43*a1b5ec25Sjsg DEFINE_ERROR(ARGUMENT, "Invalid argument"),
44*a1b5ec25Sjsg DEFINE_ERROR(CLASS, "ELF class mismatch"),
45*a1b5ec25Sjsg DEFINE_ERROR(DATA, "Invalid data buffer descriptor"),
46*a1b5ec25Sjsg DEFINE_ERROR(HEADER, "Missing or malformed ELF header"),
47*a1b5ec25Sjsg DEFINE_ERROR(IO, "I/O error"),
48*a1b5ec25Sjsg DEFINE_ERROR(LAYOUT, "Layout constraint violation"),
49*a1b5ec25Sjsg DEFINE_ERROR(MODE, "Incorrect ELF descriptor mode"),
50*a1b5ec25Sjsg DEFINE_ERROR(RANGE, "Value out of range of target"),
51*a1b5ec25Sjsg DEFINE_ERROR(RESOURCE, "Resource exhaustion"),
52*a1b5ec25Sjsg DEFINE_ERROR(SECTION, "Invalid section descriptor"),
53*a1b5ec25Sjsg DEFINE_ERROR(SEQUENCE, "API calls out of sequence"),
54*a1b5ec25Sjsg DEFINE_ERROR(UNIMPL, "Unimplemented feature"),
55*a1b5ec25Sjsg DEFINE_ERROR(VERSION, "Unknown ELF API version"),
56*a1b5ec25Sjsg DEFINE_ERROR(NUM, "Unknown error")
57*a1b5ec25Sjsg #undef DEFINE_ERROR
58*a1b5ec25Sjsg };
59*a1b5ec25Sjsg
60*a1b5ec25Sjsg const char *
elf_errmsg(int error)61*a1b5ec25Sjsg elf_errmsg(int error)
62*a1b5ec25Sjsg {
63*a1b5ec25Sjsg int oserr;
64*a1b5ec25Sjsg
65*a1b5ec25Sjsg if (error == ELF_E_NONE &&
66*a1b5ec25Sjsg (error = LIBELF_PRIVATE(error)) == 0)
67*a1b5ec25Sjsg return NULL;
68*a1b5ec25Sjsg else if (error == -1)
69*a1b5ec25Sjsg error = LIBELF_PRIVATE(error);
70*a1b5ec25Sjsg
71*a1b5ec25Sjsg oserr = error >> LIBELF_OS_ERROR_SHIFT;
72*a1b5ec25Sjsg error &= LIBELF_ELF_ERROR_MASK;
73*a1b5ec25Sjsg
74*a1b5ec25Sjsg if (error < ELF_E_NONE || error >= ELF_E_NUM)
75*a1b5ec25Sjsg return _libelf_errors[ELF_E_NUM];
76*a1b5ec25Sjsg if (oserr) {
77*a1b5ec25Sjsg (void) snprintf((char *) LIBELF_PRIVATE(msg),
78*a1b5ec25Sjsg sizeof(LIBELF_PRIVATE(msg)), "%s: %s",
79*a1b5ec25Sjsg _libelf_errors[error], strerror(oserr));
80*a1b5ec25Sjsg return (const char *)&LIBELF_PRIVATE(msg);
81*a1b5ec25Sjsg }
82*a1b5ec25Sjsg return _libelf_errors[error];
83*a1b5ec25Sjsg }
84