1 /* Initialize CPU feature data for Linux/x86. 2 This file is part of the GNU C Library. 3 Copyright (C) 2018-2021 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)) get_cet_status(void)24get_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 x86_setup_tls(void)34x86_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> 45