blob: 24a6e643b08f54a0cd2d813003ab03fdb395584a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* Thread-local storage handling in the ELF dynamic linker. x86-64 version.
Copyright (C) 2017-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifdef SHARED
/* Work around GCC PR58066, due to which __tls_get_addr may be called
with an unaligned stack. The compat implementation is in
tls_get_addr-compat.S. */
# include <dl-tls.h>
/* Define __tls_get_addr within elf/dl-tls.c under a different
name. */
extern __typeof__ (__tls_get_addr) ___tls_get_addr;
# define __tls_get_addr ___tls_get_addr
# include <elf/dl-tls.c>
# undef __tls_get_addr
hidden_ver (___tls_get_addr, __tls_get_addr)
/* Only handle slow paths for __tls_get_addr. */
attribute_hidden
void *
__tls_get_addr_slow (GET_ADDR_ARGS)
{
dtv_t *dtv = THREAD_DTV ();
size_t gen = atomic_load_relaxed (&GL(dl_tls_generation));
if (__glibc_unlikely (dtv[0].counter != gen))
return update_get_addr (GET_ADDR_PARAM);
return tls_get_addr_tail (GET_ADDR_PARAM, dtv, NULL);
}
#else
/* No compatibility symbol needed. */
# include <elf/dl-tls.c>
#endif
|
