| /* Definition for thread-local data handling. Generic version. |
| Copyright (C) 2002-2016 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* An architecture-specific version of this file has to defined a |
| number of symbols: |
| |
| TLS_TCB_AT_TP or TLS_DTV_AT_TP |
| |
| The presence of one of these symbols signals which variant of |
| the TLS ABI is used. There are in the moment two variants |
| available: |
| |
| * the thread pointer points to a thread control block |
| |
| * the thread pointer points to the dynamic thread vector |
| |
| |
| TLS_TCB_SIZE |
| |
| This is the size of the thread control block structure. How |
| this is actually defined depends on the ABI. The thread control |
| block could be internal descriptor of the thread library or |
| just a data structure which allows finding the DTV. |
| |
| TLS_INIT_TCB_SIZE |
| |
| Similarly, but this value is only used at startup and in the |
| dynamic linker itself. There are no threads in use at that time. |
| |
| |
| TLS_TCB_ALIGN |
| |
| Alignment requirements for the TCB structure. |
| |
| TLS_INIT_TCB_ALIGN |
| |
| Similarly, but for the structure used at startup time. |
| |
| |
| INSTALL_DTV(tcb, init_dtv) |
| |
| This macro must install the given initial DTV into the thread control |
| block TCB. The normal runtime functionality must then be able to |
| use the value. |
| |
| |
| TLS_INIT_TP(tcb) |
| |
| This macro must initialize the thread pointer to enable normal TLS |
| operation. The parameter is a pointer to the thread control block. |
| ld.so calls this macro once. |
| |
| |
| THREAD_DTV() |
| |
| This macro returns the address of the DTV of the current thread. |
| This normally is done using the thread register which points |
| to the dtv or the TCB (from which the DTV can found). |
| */ |