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
38int
39dwarf_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