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| 1 | /* Thread-local storage handling in the ELF dynamic linker. i386 version. |
|---|---|
| 2 | Copyright (C) 2002-2024 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 | |
| 20 | /* Type used for the representation of TLS information in the GOT. */ |
| 21 | typedef struct dl_tls_index |
| 22 | { |
| 23 | unsigned long int ti_module; |
| 24 | unsigned long int ti_offset; |
| 25 | } tls_index; |
| 26 | |
| 27 | |
| 28 | #ifdef SHARED |
| 29 | /* This is the prototype for the GNU version. */ |
| 30 | extern void *___tls_get_addr (tls_index *ti) |
| 31 | __attribute__ ((__regparm__ (1))); |
| 32 | extern void *___tls_get_addr_internal (tls_index *ti) |
| 33 | __attribute__ ((__regparm__ (1))) attribute_hidden; |
| 34 | |
| 35 | # if IS_IN (rtld) |
| 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 * |
| 43 | __tls_get_addr (tls_index *ti) |
| 44 | { |
| 45 | return ___tls_get_addr_internal (ti); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | /* Prepare using the definition of __tls_get_addr in the generic |
| 50 | version of this file. */ |
| 51 | # define __tls_get_addr __attribute__ ((__regparm__ (1))) ___tls_get_addr |
| 52 | strong_alias (___tls_get_addr, ___tls_get_addr_internal) |
| 53 | rtld_hidden_proto (___tls_get_addr) |
| 54 | rtld_hidden_def (___tls_get_addr) |
| 55 | #else |
| 56 | |
| 57 | /* Users should get the better interface. */ |
| 58 | # define __tls_get_addr ___tls_get_addr |
| 59 | |
| 60 | # endif |
| 61 | #endif |
| 62 |
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