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1/* Thread-local storage descriptor handling in the ELF dynamic linker.
2 ARM version.
3 Copyright (C) 2005-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; witout even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <https://www.gnu.org/licenses/>. */
19
20#ifndef _ARM_DL_TLSDESC_H
21# define _ARM_DL_TLSDESC_H 1
22
23/* Type used to represent a TLS descriptor in the GOT. */
24struct tlsdesc
25{
26 union
27 {
28 void *pointer;
29 long value;
30 } argument;
31 ptrdiff_t (*entry)(struct tlsdesc *);
32};
33
34
35typedef struct dl_tls_index
36{
37 unsigned long int ti_module;
38 unsigned long int ti_offset;
39} tls_index;
40
41/* Type used as the argument in a TLS descriptor for a symbol that
42 needs dynamic TLS offsets. */
43struct tlsdesc_dynamic_arg
44{
45 tls_index tlsinfo;
46 size_t gen_count;
47};
48
49extern ptrdiff_t attribute_hidden
50 _dl_tlsdesc_return(struct tlsdesc *),
51 _dl_tlsdesc_undefweak(struct tlsdesc *);
52
53# ifdef SHARED
54extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
55
56extern ptrdiff_t attribute_hidden
57 _dl_tlsdesc_dynamic(struct tlsdesc *);
58# endif
59
60#endif
61

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source code of glibc/sysdeps/arm/dl-tlsdesc.h