1  /* Initialize CPU feature data for Linux/x86.
       2     This file is part of the GNU C Library.
       3     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       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  #if CET_ENABLED
      20  # include <sys/prctl.h>
      21  # include <asm/prctl.h>
      22  
      23  static inline int __attribute__ ((always_inline))
      24  get_cet_status (void)
      25  {
      26    unsigned long long cet_status[3];
      27    if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_CET_STATUS, cet_status) == 0)
      28      return cet_status[0];
      29    return 0;
      30  }
      31  
      32  # ifndef SHARED
      33  static inline void
      34  x86_setup_tls (void)
      35  {
      36    __libc_setup_tls ();
      37    THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1));
      38  }
      39  
      40  #  define ARCH_SETUP_TLS() x86_setup_tls ()
      41  # endif
      42  #endif
      43  
      44  #include <sysdeps/x86/cpu-features.c>