1 /* Thread-local storage handling in the ELF dynamic linker. i386 version. 2 Copyright (C) 2002-2022 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 * __tls_get_addr(tls_index * ti)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