| /* Thread-local storage handling in the ELF dynamic linker. x86-64 version. |
| Copyright (C) 2017-2018 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/>. */ |
| |
| #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 (); |
| |
| if (__glibc_unlikely (dtv[0].counter != GL(dl_tls_generation))) |
| 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 |
