dwarf_cu.c revision 1.1.1.1 
1/*-
2 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include "_libdwarf.h"
28
29ELFTC_VCSID("Id: dwarf_cu.c 2072 2011-10-27 03:26:49Z jkoshy ");
30
31int
32dwarf_next_cu_header_b(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
33    Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
34    Dwarf_Half *cu_pointer_size, Dwarf_Half *cu_offset_size,
35    Dwarf_Half *cu_extension_size, Dwarf_Unsigned *cu_next_offset,
36    Dwarf_Error *error)
37{
38	Dwarf_CU cu;
39	int ret;
40
41	if (dbg == NULL) {
42		DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
43		return (DW_DLV_ERROR);
44	}
45
46	if (dbg->dbg_cu_current == NULL)
47		ret = _dwarf_info_first_cu(dbg, error);
48	else
49		ret = _dwarf_info_next_cu(dbg, error);
50
51	if (ret == DW_DLE_NO_ENTRY) {
52		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
53		return (DW_DLV_NO_ENTRY);
54	} else if (ret != DW_DLE_NONE)
55		return (DW_DLV_ERROR);
56
57	if (dbg->dbg_cu_current == NULL) {
58		DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
59		return (DW_DLV_NO_ENTRY);
60	}
61	cu = dbg->dbg_cu_current;
62
63	if (cu_length)
64		*cu_length = cu->cu_length;
65	if (cu_version)
66		*cu_version = cu->cu_version;
67	if (cu_abbrev_offset)
68		*cu_abbrev_offset = (Dwarf_Off) cu->cu_abbrev_offset;
69	if (cu_pointer_size)
70		*cu_pointer_size = cu->cu_pointer_size;
71	if (cu_offset_size) {
72		if (cu->cu_length_size == 4)
73			*cu_offset_size = 4;
74		else
75			*cu_offset_size = 8;
76	}
77	if (cu_extension_size) {
78		if (cu->cu_length_size == 4)
79			*cu_extension_size = 0;
80		else
81			*cu_extension_size = 4;
82	}
83	if (cu_next_offset)
84		*cu_next_offset	= dbg->dbg_cu_current->cu_next_offset;
85
86	return (DW_DLV_OK);
87}
88
89int
90dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length,
91    Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset,
92    Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset,
93    Dwarf_Error *error)
94{
95
96	return (dwarf_next_cu_header_b(dbg, cu_length, cu_version,
97	    cu_abbrev_offset, cu_pointer_size, NULL, NULL, cu_next_offset,
98	    error));
99}
100