1 /* Provides information and DIEs associated with the Dwarf_CU unit.
2 Copyright (C) 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
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #include <string.h>
35 #include "libdwP.h"
36
37
38 int
dwarf_cu_info(Dwarf_CU * cu,Dwarf_Half * version,uint8_t * unit_type,Dwarf_Die * cudie,Dwarf_Die * subdie,uint64_t * unit_id,uint8_t * address_size,uint8_t * offset_size)39 dwarf_cu_info (Dwarf_CU *cu,
40 Dwarf_Half *version, uint8_t *unit_type,
41 Dwarf_Die *cudie, Dwarf_Die *subdie,
42 uint64_t *unit_id,
43 uint8_t *address_size, uint8_t *offset_size)
44 {
45 if (cu == NULL)
46 return -1;
47
48 if (version != NULL)
49 *version = cu->version;
50
51 if (unit_type != NULL)
52 *unit_type = cu->unit_type;
53
54 if (cudie != NULL)
55 {
56 if (cu->version >= 2 && cu->version <= 5
57 && cu->unit_type >= DW_UT_compile
58 && cu->unit_type <= DW_UT_split_type)
59 *cudie = CUDIE (cu);
60 else
61 {
62 invalid:
63 __libdw_seterrno (DWARF_E_INVALID_DWARF);
64 return -1;
65 }
66 }
67
68 if (subdie != NULL)
69 {
70 if (cu->version >= 2 && cu->version <= 5)
71 {
72 /* For types, return the actual type DIE. For skeletons,
73 find the associated split compile unit and return its
74 DIE. */
75 if (cu->unit_type == DW_UT_type
76 || cu->unit_type == DW_UT_split_type)
77 *subdie = SUBDIE(cu);
78 else if (cu->unit_type == DW_UT_skeleton)
79 {
80 Dwarf_CU *split_cu = __libdw_find_split_unit (cu);
81 if (split_cu != NULL)
82 *subdie = CUDIE(split_cu);
83 else
84 memset (subdie, '\0', sizeof (Dwarf_Die));
85 }
86 else
87 memset (subdie, '\0', sizeof (Dwarf_Die));
88 }
89 else
90 goto invalid;
91 }
92
93 if (unit_id != NULL)
94 *unit_id = cu->unit_id8;
95
96 if (address_size != NULL)
97 *address_size = cu->address_size;
98
99 if (offset_size != NULL)
100 *offset_size = cu->offset_size;
101
102 return 0;
103 }
104