1  /* Copyright (C) 2002-2023 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 */