elf_errmsg.c revision 241720
1240868Spjd/*-
2240868Spjd * Copyright (c) 2006 Joseph Koshy
3240868Spjd * All rights reserved.
4240868Spjd *
5240868Spjd * Redistribution and use in source and binary forms, with or without
6240868Spjd * modification, are permitted provided that the following conditions
7240868Spjd * are met:
8240868Spjd * 1. Redistributions of source code must retain the above copyright
9240868Spjd *    notice, this list of conditions and the following disclaimer.
10240868Spjd * 2. Redistributions in binary form must reproduce the above copyright
11240868Spjd *    notice, this list of conditions and the following disclaimer in the
12240868Spjd *    documentation and/or other materials provided with the distribution.
13240868Spjd *
14240868Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15240868Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16240868Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17240868Spjd * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18240868Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19240868Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20240868Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21240868Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22240868Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23240868Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24240868Spjd * SUCH DAMAGE.
25240868Spjd */
26240868Spjd
27240868Spjd#include <sys/cdefs.h>
28240868Spjd__FBSDID("$FreeBSD: head/lib/libelf/elf_errmsg.c 241720 2012-10-19 05:43:38Z ed $");
29240868Spjd
30240868Spjd#include <libelf.h>
31244187Ssmh#include <string.h>
32244187Ssmh
33244187Ssmh#include "_libelf.h"
34244187Ssmh
35244187Ssmh/*
36244187Ssmh * Retrieve a human readable translation for an error message.
37244187Ssmh */
38244187Ssmh
39248572Ssmhstatic const char *_libelf_errors[] = {
40248572Ssmh#define	DEFINE_ERROR(N,S)	[ELF_E_##N] = S
41244187Ssmh	DEFINE_ERROR(NONE,	"No Error"),
42240868Spjd	DEFINE_ERROR(ARCHIVE,	"Malformed ar(1) archive"),
43240868Spjd	DEFINE_ERROR(ARGUMENT,	"Invalid argument"),
44240868Spjd	DEFINE_ERROR(CLASS,	"ELF class mismatch"),
45240868Spjd	DEFINE_ERROR(DATA,	"Invalid data buffer descriptor"),
46240868Spjd	DEFINE_ERROR(HEADER,	"Missing or malformed ELF header"),
47240868Spjd	DEFINE_ERROR(IO,	"I/O error"),
48240868Spjd	DEFINE_ERROR(LAYOUT,	"Layout constraint violation"),
49240868Spjd	DEFINE_ERROR(MODE,	"Incorrect ELF descriptor mode"),
50240868Spjd	DEFINE_ERROR(RANGE,	"Value out of range of target"),
51240868Spjd	DEFINE_ERROR(RESOURCE,	"Resource exhaustion"),
52240868Spjd	DEFINE_ERROR(SECTION,	"Invalid section descriptor"),
53240868Spjd	DEFINE_ERROR(SEQUENCE,	"API calls out of sequence"),
54240868Spjd	DEFINE_ERROR(UNIMPL,	"Unimplemented feature"),
55240868Spjd	DEFINE_ERROR(VERSION,	"Unknown ELF API version"),
56240868Spjd	DEFINE_ERROR(NUM,	"Unknown error")
57240868Spjd#undef	DEFINE_ERROR
58240868Spjd};
59240868Spjd
60240868Spjdconst char *
61240868Spjdelf_errmsg(int error)
62240868Spjd{
63240868Spjd	int oserr;
64240868Spjd
65240868Spjd	if (error == 0 && (error = LIBELF_PRIVATE(error)) == 0)
66240868Spjd	    return NULL;
67240868Spjd	else if (error == -1)
68240868Spjd	    error = LIBELF_PRIVATE(error);
69240868Spjd
70240868Spjd	oserr = error >> LIBELF_OS_ERROR_SHIFT;
71240868Spjd	error &= LIBELF_ELF_ERROR_MASK;
72240868Spjd
73240868Spjd	if (error < 0 || error >= ELF_E_NUM)
74240868Spjd		return _libelf_errors[ELF_E_NUM];
75240868Spjd	if (oserr) {
76240868Spjd		strlcpy(LIBELF_PRIVATE(msg), _libelf_errors[error],
77240868Spjd		    sizeof(LIBELF_PRIVATE(msg)));
78240868Spjd		strlcat(LIBELF_PRIVATE(msg), ": ", sizeof(LIBELF_PRIVATE(msg)));
79240868Spjd		strlcat(LIBELF_PRIVATE(msg), strerror(oserr),
80240868Spjd		    sizeof(LIBELF_PRIVATE(msg)));
81240868Spjd		return (const char *)&LIBELF_PRIVATE(msg);
82240868Spjd	}
83240868Spjd	return _libelf_errors[error];
84240868Spjd}
85240868Spjd
86240868Spjd#if	defined(LIBELF_TEST_HOOKS)
87240868Spjd
88240868Spjdconst char *
89240868Spjd_libelf_get_unknown_error_message(void)
90240868Spjd{
91240868Spjd	return _libelf_errors[ELF_E_NUM];
92240868Spjd}
93240868Spjd
94240868Spjdconst char *
95240868Spjd_libelf_get_no_error_message(void)
96240868Spjd{
97240868Spjd	return _libelf_errors[0];
98240868Spjd}
99240868Spjd
100240868Spjd#endif	/* LIBELF_TEST_HOOKS */
101240868Spjd