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3fb55878 | 1 | /* Thread-local storage handling in the ELF dynamic linker. i386 version. |
04277e02 | 2 | Copyright (C) 2002-2019 Free Software Foundation, Inc. |
3fb55878 UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
3fb55878 | 18 | |
aed283dd | 19 | |
3fb55878 | 20 | /* Type used for the representation of TLS information in the GOT. */ |
c9ff0187 | 21 | typedef struct dl_tls_index |
3fb55878 UD |
22 | { |
23 | unsigned long int ti_module; | |
24 | unsigned long int ti_offset; | |
cd30b01e | 25 | } tls_index; |
3fb55878 UD |
26 | |
27 | ||
aed283dd | 28 | #ifdef SHARED |
3fb55878 | 29 | /* This is the prototype for the GNU version. */ |
cd30b01e | 30 | extern void *___tls_get_addr (tls_index *ti) |
3fb55878 | 31 | __attribute__ ((__regparm__ (1))); |
eee868c3 | 32 | extern void *___tls_get_addr_internal (tls_index *ti) |
ce460d04 | 33 | __attribute__ ((__regparm__ (1))) attribute_hidden; |
3fb55878 | 34 | |
a3848485 | 35 | # if IS_IN (rtld) |
3fb55878 UD |
36 | /* The special thing about the x86 TLS ABI is that we have two |
37 | variants of the __tls_get_addr function with different calling | |
38 | conventions. The GNU version, which we are mostly concerned here, | |
39 | takes the parameter in a register. The name is changed by adding | |
40 | an additional underscore at the beginning. The Sun version uses | |
41 | the normal calling convention. */ | |
42 | void * | |
cd30b01e | 43 | __tls_get_addr (tls_index *ti) |
3fb55878 | 44 | { |
eee868c3 | 45 | return ___tls_get_addr_internal (ti); |
3fb55878 UD |
46 | } |
47 | ||
48 | ||
49 | /* Prepare using the definition of __tls_get_addr in the generic | |
50 | version of this file. */ | |
aed283dd | 51 | # define __tls_get_addr __attribute__ ((__regparm__ (1))) ___tls_get_addr |
eee868c3 | 52 | strong_alias (___tls_get_addr, ___tls_get_addr_internal) |
050f7298 L |
53 | rtld_hidden_proto (___tls_get_addr) |
54 | rtld_hidden_def (___tls_get_addr) | |
154d10bd UD |
55 | #else |
56 | ||
57 | /* Users should get the better interface. */ | |
58 | # define __tls_get_addr ___tls_get_addr | |
59 | ||
60 | # endif | |
aed283dd | 61 | #endif |