1/*-
2 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <stdio.h>
30#include "_libdwarf.h"
31
32static const char *_libdwarf_errors[] = {
33#define	DEFINE_ERROR(N,S)		[DWARF_E_##N] = S
34	DEFINE_ERROR(NONE,		"No Error"),
35	DEFINE_ERROR(ERROR,		"An error"),
36	DEFINE_ERROR(NO_ENTRY,		"No entry found"),
37	DEFINE_ERROR(ARGUMENT,		"Invalid argument"),
38	DEFINE_ERROR(DEBUG_INFO,	"Debug info NULL"),
39	DEFINE_ERROR(MEMORY,		"Insufficient memory"),
40	DEFINE_ERROR(ELF,		"ELF error"),
41	DEFINE_ERROR(INVALID_CU,	"Invalid compilation unit data"),
42	DEFINE_ERROR(CU_VERSION,	"Wrong CU version. Only 2 and 3 supported"),
43	DEFINE_ERROR(MISSING_ABBREV,	"Abbrev not found"),
44	DEFINE_ERROR(NOT_IMPLEMENTED,	"Unimplemented code at"),
45	DEFINE_ERROR(CU_CURRENT,	"No current compilation unit"),
46	DEFINE_ERROR(BAD_FORM,		"Wrong form type for attribute value"),
47	DEFINE_ERROR(INVALID_EXPR,	"Invalid DWARF expression"),
48	DEFINE_ERROR(NUM,		"Unknown DWARF error")
49#undef	DEFINE_ERROR
50};
51
52const char *
53dwarf_errmsg(Dwarf_Error *error)
54{
55	const char *p;
56
57	if (error == NULL)
58		return NULL;
59
60	if (error->err_error < 0 || error->err_error >= DWARF_E_NUM)
61		return _libdwarf_errors[DWARF_E_NUM];
62	else if (error->err_error == DWARF_E_NONE)
63		return _libdwarf_errors[DWARF_E_NONE];
64	else
65		p = _libdwarf_errors[error->err_error];
66
67	if (error->err_error == DWARF_E_ELF)
68		snprintf(error->err_msg, sizeof(error->err_msg),
69		    "ELF error : %s [%s(%d)]", elf_errmsg(error->elf_error),
70		    error->err_func, error->err_line);
71	else
72		snprintf(error->err_msg, sizeof(error->err_msg),
73		    "%s [%s(%d)]", p, error->err_func, error->err_line);
74
75	return (const char *) error->err_msg;
76}
77