1/* Generic declarations for DTV-based TLS handling in the dynamic linker.
2 Copyright (C) 2002-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _DL_DTV_H
20#define _DL_DTV_H
21
22struct dtv_pointer
23{
24 void *val; /* Pointer to data, or TLS_DTV_UNALLOCATED. */
25 void *to_free; /* Unaligned pointer, for deallocation. */
26};
27
28/* Type for the dtv. */
29typedef union dtv
30{
31 size_t counter;
32 struct dtv_pointer pointer;
33} dtv_t;
34
35/* Value used for dtv entries for which the allocation is delayed. */
36#define TLS_DTV_UNALLOCATED ((void *) -1l)
37
38#endif /* _DLT_DTV_H */
39