dwarf_error.c revision 775375e3bd177cb19acb5020b6e0917551807276 
1/* Retrieve ELF descriptor used for DWARF access.
2   Copyright (C) 2002, 2003, 2004, 2005, 2009 Red Hat, Inc.
3   This file is part of elfutils.
4   Written by Ulrich Drepper <drepper@redhat.com>, 2002.
5
6   This file is free software; you can redistribute it and/or modify
7   it under the terms of either
8
9     * the GNU Lesser General Public License as published by the Free
10       Software Foundation; either version 3 of the License, or (at
11       your option) any later version
12
13   or
14
15     * the GNU General Public License as published by the Free
16       Software Foundation; either version 2 of the License, or (at
17       your option) any later version
18
19   or both in parallel, as here.
20
21   elfutils is distributed in the hope that it will be useful, but
22   WITHOUT ANY WARRANTY; without even the implied warranty of
23   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
24   General Public License for more details.
25
26   You should have received copies of the GNU General Public License and
27   the GNU Lesser General Public License along with this program.  If
28   not, see <http://www.gnu.org/licenses/>.  */
29
30#ifdef HAVE_CONFIG_H
31# include <config.h>
32#endif
33
34#include <assert.h>
35#include <stddef.h>
36
37#include "libdwP.h"
38
39
40/* The error number.  */
41static __thread int global_error;
42
43
44int
45dwarf_errno (void)
46{
47  int result = global_error;
48  global_error = DWARF_E_NOERROR;
49  return result;
50}
51INTDEF(dwarf_errno)
52
53
54/* XXX For now we use string pointers.  Once the table stablelizes
55   make it more DSO-friendly.  */
56static const char *errmsgs[] =
57  {
58    [DWARF_E_NOERROR] = N_("no error"),
59    [DWARF_E_UNKNOWN_ERROR] = N_("unknown error"),
60    [DWARF_E_INVALID_ACCESS] = N_("invalid access"),
61    [DWARF_E_NO_REGFILE] = N_("no regular file"),
62    [DWARF_E_IO_ERROR] = N_("I/O error"),
63    [DWARF_E_INVALID_ELF] = N_("invalid ELF file"),
64    [DWARF_E_NO_DWARF] = N_("no DWARF information"),
65    [DWARF_E_NOELF] = N_("no ELF file"),
66    [DWARF_E_GETEHDR_ERROR] = N_("cannot get ELF header"),
67    [DWARF_E_NOMEM] = N_("out of memory"),
68    [DWARF_E_UNIMPL] = N_("not implemented"),
69    [DWARF_E_INVALID_CMD] = N_("invalid command"),
70    [DWARF_E_INVALID_VERSION] = N_("invalid version"),
71    [DWARF_E_INVALID_FILE] = N_("invalid file"),
72    [DWARF_E_NO_ENTRY] = N_("no entries found"),
73    [DWARF_E_INVALID_DWARF] = N_("invalid DWARF"),
74    [DWARF_E_NO_STRING] = N_("no string data"),
75    [DWARF_E_NO_ADDR] = N_("no address value"),
76    [DWARF_E_NO_CONSTANT] = N_("no constant value"),
77    [DWARF_E_NO_REFERENCE] = N_("no reference value"),
78    [DWARF_E_INVALID_REFERENCE] = N_("invalid reference value"),
79    [DWARF_E_NO_DEBUG_LINE] = N_(".debug_line section missing"),
80    [DWARF_E_INVALID_DEBUG_LINE] = N_("invalid .debug_line section"),
81    [DWARF_E_TOO_BIG] = N_("debug information too big"),
82    [DWARF_E_VERSION] = N_("invalid DWARF version"),
83    [DWARF_E_INVALID_DIR_IDX] = N_("invalid directory index"),
84    [DWARF_E_ADDR_OUTOFRANGE] = N_("address out of range"),
85    [DWARF_E_NO_LOCLIST] = N_("no location list value"),
86    [DWARF_E_NO_BLOCK] = N_("no block data"),
87    [DWARF_E_INVALID_LINE_IDX] = N_("invalid line index"),
88    [DWARF_E_INVALID_ARANGE_IDX] = N_("invalid address range index"),
89    [DWARF_E_NO_MATCH] = N_("no matching address range"),
90    [DWARF_E_NO_FLAG] = N_("no flag value"),
91    [DWARF_E_INVALID_OFFSET] = N_("invalid offset"),
92    [DWARF_E_NO_DEBUG_RANGES] = N_(".debug_ranges section missing"),
93    [DWARF_E_INVALID_CFI] = N_("invalid CFI section"),
94    [DWARF_E_NO_ALT_DEBUGLINK] = N_("no alternative debug link found"),
95  };
96#define nerrmsgs (sizeof (errmsgs) / sizeof (errmsgs[0]))
97
98
99void
100__libdw_seterrno (value)
101     int value;
102{
103  global_error = (value >= 0 && value < (int) nerrmsgs
104		  ? value : DWARF_E_UNKNOWN_ERROR);
105}
106
107
108const char *
109dwarf_errmsg (error)
110     int error;
111{
112  int last_error = global_error;
113
114  if (error == 0)
115    return last_error != 0 ? _(errmsgs[last_error]) : NULL;
116  else if (error < -1 || error >= (int) nerrmsgs)
117    return _(errmsgs[DWARF_E_UNKNOWN_ERROR]);
118
119  return _(errmsgs[error == -1 ? last_error : error]);
120}
121INTDEF(dwarf_errmsg)
122