Branch data Line data Source code
1 : : /* Retrieve ELF descriptor used for DWARF access.
2 : : Copyright (C) 2002-2005, 2009, 2014, 2015, 2017, 2018 Red Hat, Inc.
3 : : This file is part of elfutils.
4 : :
5 : : This file is free software; you can redistribute it and/or modify
6 : : it under the terms of either
7 : :
8 : : * the GNU Lesser General Public License as published by the Free
9 : : Software Foundation; either version 3 of the License, or (at
10 : : your option) any later version
11 : :
12 : : or
13 : :
14 : : * the GNU General Public License as published by the Free
15 : : Software Foundation; either version 2 of the License, or (at
16 : : your option) any later version
17 : :
18 : : or both in parallel, as here.
19 : :
20 : : elfutils is distributed in the hope that it will be useful, but
21 : : WITHOUT ANY WARRANTY; without even the implied warranty of
22 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 : : General Public License for more details.
24 : :
25 : : You should have received copies of the GNU General Public License and
26 : : the GNU Lesser General Public License along with this program. If
27 : : not, see <http://www.gnu.org/licenses/>. */
28 : :
29 : : #ifdef HAVE_CONFIG_H
30 : : # include <config.h>
31 : : #endif
32 : :
33 : : #include <assert.h>
34 : : #include <stddef.h>
35 : :
36 : : #include "libdwP.h"
37 : :
38 : :
39 : : /* The error number. */
40 : : static __thread int global_error;
41 : :
42 : :
43 : : int
44 : 376404 : dwarf_errno (void)
45 : : {
46 : 376404 : int result = global_error;
47 : 376404 : global_error = DWARF_E_NOERROR;
48 : 376404 : return result;
49 : : }
50 : : INTDEF(dwarf_errno)
51 : :
52 : :
53 : : /* XXX For now we use string pointers. Once the table stablelizes
54 : : make it more DSO-friendly. */
55 : : static const char *errmsgs[] =
56 : : {
57 : : [DWARF_E_NOERROR] = N_("no error"),
58 : : [DWARF_E_UNKNOWN_ERROR] = N_("unknown error"),
59 : : [DWARF_E_INVALID_ACCESS] = N_("invalid access"),
60 : : [DWARF_E_NO_REGFILE] = N_("no regular file"),
61 : : [DWARF_E_IO_ERROR] = N_("I/O error"),
62 : : [DWARF_E_INVALID_ELF] = N_("invalid ELF file"),
63 : : [DWARF_E_NO_DWARF] = N_("no DWARF information"),
64 : : [DWARF_E_COMPRESSED_ERROR] = N_("cannot decompress DWARF"),
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_DEBUG_STR] = N_(".debug_str section missing"),
76 : : [DWARF_E_NO_DEBUG_LINE_STR] = N_(".debug_line_str section missing"),
77 : : [DWARF_E_NO_STR_OFFSETS] = N_(".debug_str_offsets section missing"),
78 : : [DWARF_E_NO_ADDR] = N_("no address value"),
79 : : [DWARF_E_NO_CONSTANT] = N_("no constant value"),
80 : : [DWARF_E_NO_REFERENCE] = N_("no reference value"),
81 : : [DWARF_E_INVALID_REFERENCE] = N_("invalid reference value"),
82 : : [DWARF_E_NO_DEBUG_LINE] = N_(".debug_line section missing"),
83 : : [DWARF_E_INVALID_DEBUG_LINE] = N_("invalid .debug_line section"),
84 : : [DWARF_E_TOO_BIG] = N_("debug information too big"),
85 : : [DWARF_E_VERSION] = N_("invalid DWARF version"),
86 : : [DWARF_E_INVALID_DIR_IDX] = N_("invalid directory index"),
87 : : [DWARF_E_ADDR_OUTOFRANGE] = N_("address out of range"),
88 : : [DWARF_E_NO_DEBUG_LOC] = N_(".debug_loc section missing"),
89 : : [DWARF_E_NO_DEBUG_LOCLISTS] = N_(".debug_loclists section missing"),
90 : : [DWARF_E_NO_LOC_VALUE] = N_("not a location list value"),
91 : : [DWARF_E_NO_BLOCK] = N_("no block data"),
92 : : [DWARF_E_INVALID_LINE_IDX] = N_("invalid line index"),
93 : : [DWARF_E_INVALID_ARANGE_IDX] = N_("invalid address range index"),
94 : : [DWARF_E_NO_MATCH] = N_("no matching address range"),
95 : : [DWARF_E_NO_FLAG] = N_("no flag value"),
96 : : [DWARF_E_INVALID_OFFSET] = N_("invalid offset"),
97 : : [DWARF_E_NO_DEBUG_RANGES] = N_(".debug_ranges section missing"),
98 : : [DWARF_E_NO_DEBUG_RNGLISTS] = N_(".debug_rnglists section missing"),
99 : : [DWARF_E_INVALID_CFI] = N_("invalid CFI section"),
100 : : [DWARF_E_NO_ALT_DEBUGLINK] = N_("no alternative debug link found"),
101 : : [DWARF_E_INVALID_OPCODE] = N_("invalid opcode"),
102 : : [DWARF_E_NOT_CUDIE] = N_("not a CU (unit) DIE"),
103 : : [DWARF_E_UNKNOWN_LANGUAGE] = N_("unknown language code"),
104 : : [DWARF_E_NO_DEBUG_ADDR] = N_(".debug_addr section missing"),
105 : : };
106 : : #define nerrmsgs (sizeof (errmsgs) / sizeof (errmsgs[0]))
107 : :
108 : :
109 : : void
110 : : internal_function
111 : 5519613 : __libdw_seterrno (int value)
112 : : {
113 : 11039226 : global_error = (value >= 0 && value < (int) nerrmsgs
114 [ - + ]: 5519613 : ? value : DWARF_E_UNKNOWN_ERROR);
115 : 5519613 : }
116 : :
117 : :
118 : : const char *
119 : 14 : dwarf_errmsg (int error)
120 : : {
121 : 14 : int last_error = global_error;
122 : :
123 [ - + ]: 14 : if (error == 0)
124 [ # # ]: 0 : return last_error != 0 ? _(errmsgs[last_error]) : NULL;
125 [ - + ]: 14 : else if (error < -1 || error >= (int) nerrmsgs)
126 : 0 : return _(errmsgs[DWARF_E_UNKNOWN_ERROR]);
127 : :
128 [ + + ]: 19 : return _(errmsgs[error == -1 ? last_error : error]);
129 : : }
130 : : INTDEF(dwarf_errmsg)
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