Line data Source code
1 : /* Get specific attribute of abbreviation.
2 : Copyright (C) 2003, 2004, 2005, 2014, 2017 Red Hat, Inc.
3 : This file is part of elfutils.
4 : Written by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <dwarf.h>
36 : #include "libdwP.h"
37 :
38 :
39 : int
40 285640 : dwarf_getabbrevattr_data (Dwarf_Abbrev *abbrev, size_t idx,
41 : unsigned int *namep, unsigned int *formp,
42 : Dwarf_Sword *datap, Dwarf_Off *offsetp)
43 : {
44 285640 : if (abbrev == NULL)
45 : return -1;
46 :
47 285640 : size_t cnt = 0;
48 285640 : const unsigned char *attrp = abbrev->attrp;
49 : const unsigned char *start_attrp;
50 : unsigned int name;
51 : unsigned int form;
52 : Dwarf_Word data;
53 :
54 : do
55 : {
56 1011177 : start_attrp = attrp;
57 :
58 : /* Attribute code and form are encoded as ULEB128 values.
59 : Already checked when Dwarf_Abbrev was created, read unchecked. */
60 1011177 : get_uleb128_unchecked (name, attrp);
61 1011177 : get_uleb128_unchecked (form, attrp);
62 :
63 1011177 : if (form == DW_FORM_implicit_const)
64 0 : get_sleb128_unchecked (data, attrp);
65 : else
66 : data = 0;
67 :
68 : /* If both values are zero the index is out of range. */
69 1011177 : if (name == 0 && form == 0)
70 : return -1;
71 : }
72 955023 : while (cnt++ < idx);
73 :
74 : /* Store the result if requested. */
75 229486 : if (namep != NULL)
76 229486 : *namep = name;
77 229486 : if (formp != NULL)
78 229486 : *formp = form;
79 229486 : if (datap != NULL)
80 229223 : *datap = data;
81 229486 : if (offsetp != NULL)
82 229486 : *offsetp = (start_attrp - abbrev->attrp) + abbrev->offset;
83 :
84 : return 0;
85 : }
86 : INTDEF(dwarf_getabbrevattr_data)
87 :
88 : int
89 263 : dwarf_getabbrevattr (Dwarf_Abbrev *abbrev, size_t idx, unsigned int *namep,
90 : unsigned int *formp, Dwarf_Off *offsetp)
91 : {
92 263 : return INTUSE(dwarf_getabbrevattr_data) (abbrev, idx, namep, formp,
93 : NULL, offsetp);
94 : }
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