1 /* Common interface for libebl modules.
2 Copyright (C) 2000, 2001, 2002, 2003, 2005, 2013, 2014 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 #ifndef _LIBEBL_CPU_H
30 #define _LIBEBL_CPU_H 1
31
32 #include <dwarf.h>
33 #include <libeblP.h>
34
35 #define EBLHOOK(name) EBLHOOK_1(BACKEND, name)
36 #define EBLHOOK_1(a, b) EBLHOOK_2(a, b)
37 #define EBLHOOK_2(a, b) a##b
38
39 /* Constructor. */
40 extern const char *EBLHOOK(init) (Elf *elf, GElf_Half machine,
41 Ebl *eh, size_t ehlen);
42
43 #include "ebl-hooks.h"
44
45 #define HOOK(eh, name) eh->name = EBLHOOK(name)
46
47 extern bool (*generic_debugscn_p) (const char *) attribute_hidden;
48
49 /* Helper for retval. Return dwarf_tag (die), but calls return -1
50 if there where previous errors that leave die NULL. */
51 #define DWARF_TAG_OR_RETURN(die) \
52 ({ Dwarf_Die *_die = (die); \
53 if (_die == NULL) return -1; \
54 dwarf_tag (_die); })
55
56 /* Get a type die corresponding to DIE. Peel CV qualifiers off
57 it. */
58 static inline int
dwarf_peeled_die_type(Dwarf_Die * die,Dwarf_Die * result)59 dwarf_peeled_die_type (Dwarf_Die *die, Dwarf_Die *result)
60 {
61 Dwarf_Attribute attr_mem;
62 Dwarf_Attribute *attr = dwarf_attr_integrate (die, DW_AT_type, &attr_mem);
63 if (attr == NULL)
64 /* The function has no return value, like a `void' function in C. */
65 return 0;
66
67 if (dwarf_formref_die (attr, result) == NULL)
68 return -1;
69
70 if (dwarf_peel_type (result, result) != 0)
71 return -1;
72
73 return DWARF_TAG_OR_RETURN (result);
74 }
75
76 #endif /* libebl_CPU.h */
77