1 /* Copyright (C) 2002-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _TLS_H 19 20 /* Additional definitions for <tls.h> on i686 and up. */ 21 22 23 /* Macros to load from and store into segment registers. We can use 24 the 32-bit instructions. */ 25 #define TLS_GET_GS() \ 26 ({ int __seg; __asm ("movl %%gs, %0" : "=q" (__seg)); __seg; }) 27 #define TLS_SET_GS(val) \ 28 __asm ("movl %0, %%gs" :: "q" (val)) 29 30 31 /* Get the full set of definitions. */ 32 #include_next <tls.h> 33 34 #endif /* tls.h */ 35