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c9ff0187 UD |
1 | /* Thread-local storage descriptor handling in the ELF dynamic linker. |
2 | x86_64 version. | |
6d7e8eda | 3 | Copyright (C) 2005-2023 Free Software Foundation, Inc. |
c9ff0187 UD |
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; without 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 | |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
c9ff0187 | 19 | |
e054f494 RA |
20 | #include <stdint.h> |
21 | ||
c9ff0187 UD |
22 | #ifndef _X86_64_DL_TLSDESC_H |
23 | # define _X86_64_DL_TLSDESC_H 1 | |
24 | ||
c9ff0187 UD |
25 | /* Type used to represent a TLS descriptor in the GOT. */ |
26 | struct tlsdesc | |
27 | { | |
1532c7ac L |
28 | /* Anonymous union is used here to ensure that GOT entry slot is always |
29 | 8 bytes for both x32 and x86-64. */ | |
30 | union | |
31 | { | |
32 | ptrdiff_t (*entry) (struct tlsdesc *on_rax); | |
33 | uint64_t entry_slot; | |
34 | }; | |
35 | union | |
36 | { | |
37 | void *arg; | |
38 | uint64_t arg_slot; | |
39 | }; | |
c9ff0187 UD |
40 | }; |
41 | ||
42 | typedef struct dl_tls_index | |
43 | { | |
1532c7ac L |
44 | uint64_t ti_module; |
45 | uint64_t ti_offset; | |
c9ff0187 UD |
46 | } tls_index; |
47 | ||
48 | /* Type used as the argument in a TLS descriptor for a symbol that | |
49 | needs dynamic TLS offsets. */ | |
50 | struct tlsdesc_dynamic_arg | |
51 | { | |
52 | tls_index tlsinfo; | |
53 | size_t gen_count; | |
54 | }; | |
55 | ||
56 | extern ptrdiff_t attribute_hidden | |
57 | _dl_tlsdesc_return(struct tlsdesc *on_rax), | |
55c9f323 | 58 | _dl_tlsdesc_undefweak(struct tlsdesc *on_rax); |
c9ff0187 UD |
59 | |
60 | # ifdef SHARED | |
9edf9b18 L |
61 | extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, |
62 | size_t ti_offset) | |
17e00cc6 | 63 | attribute_hidden; |
c9ff0187 UD |
64 | |
65 | extern ptrdiff_t attribute_hidden _dl_tlsdesc_dynamic(struct tlsdesc *); | |
66 | # endif | |
67 | ||
68 | #endif |