1 /* $NetBSD: dwarf_cu.c,v 1.2 2014/03/09 16:58:03 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "_libdwarf.h"
30
31 __RCSID("$NetBSD: dwarf_cu.c,v 1.2 2014/03/09 16:58:03 christos Exp $");
32 ELFTC_VCSID("Id: dwarf_cu.c 2072 2011-10-27 03:26:49Z jkoshy ");
33
34 int
dwarf_next_cu_header_b(Dwarf_Debug dbg,Dwarf_Unsigned * cu_length,Dwarf_Half * cu_version,Dwarf_Off * cu_abbrev_offset,Dwarf_Half * cu_pointer_size,Dwarf_Half * cu_offset_size,Dwarf_Half * cu_extension_size,Dwarf_Unsigned * cu_next_offset,Dwarf_Error * error)35 dwarf_next_cu_header_b(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
36 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
37 Dwarf_Half *cu_pointer_size, Dwarf_Half *cu_offset_size,
38 Dwarf_Half *cu_extension_size, Dwarf_Unsigned *cu_next_offset,
39 Dwarf_Error *error)
40 {
41 Dwarf_CU cu;
42 int ret;
43
44 if (dbg == NULL) {
45 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
46 return (DW_DLV_ERROR);
47 }
48
49 if (dbg->dbg_cu_current == NULL)
50 ret = _dwarf_info_first_cu(dbg, error);
51 else
52 ret = _dwarf_info_next_cu(dbg, error);
53
54 if (ret == DW_DLE_NO_ENTRY) {
55 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
56 return (DW_DLV_NO_ENTRY);
57 } else if (ret != DW_DLE_NONE)
58 return (DW_DLV_ERROR);
59
60 if (dbg->dbg_cu_current == NULL) {
61 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
62 return (DW_DLV_NO_ENTRY);
63 }
64 cu = dbg->dbg_cu_current;
65
66 if (cu_length)
67 *cu_length = cu->cu_length;
68 if (cu_version)
69 *cu_version = cu->cu_version;
70 if (cu_abbrev_offset)
71 *cu_abbrev_offset = (Dwarf_Off) cu->cu_abbrev_offset;
72 if (cu_pointer_size)
73 *cu_pointer_size = cu->cu_pointer_size;
74 if (cu_offset_size) {
75 if (cu->cu_length_size == 4)
76 *cu_offset_size = 4;
77 else
78 *cu_offset_size = 8;
79 }
80 if (cu_extension_size) {
81 if (cu->cu_length_size == 4)
82 *cu_extension_size = 0;
83 else
84 *cu_extension_size = 4;
85 }
86 if (cu_next_offset)
87 *cu_next_offset = dbg->dbg_cu_current->cu_next_offset;
88
89 return (DW_DLV_OK);
90 }
91
92 int
dwarf_next_cu_header(Dwarf_Debug dbg,Dwarf_Unsigned * cu_length,Dwarf_Half * cu_version,Dwarf_Off * cu_abbrev_offset,Dwarf_Half * cu_pointer_size,Dwarf_Unsigned * cu_next_offset,Dwarf_Error * error)93 dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
94 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
95 Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset,
96 Dwarf_Error *error)
97 {
98
99 return (dwarf_next_cu_header_b(dbg, cu_length, cu_version,
100 cu_abbrev_offset, cu_pointer_size, NULL, NULL, cu_next_offset,
101 error));
102 }
103