diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86/cpu-features.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86/cpu-features.c b/sysdeps/unix/sysv/linux/x86/cpu-features.c new file mode 100644 index 0000000000..8566a265b8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86/cpu-features.c @@ -0,0 +1,46 @@ +/* Initialize CPU feature data for Linux/x86. + This file is part of the GNU C Library. + Copyright (C) 2018 Free Software Foundation, Inc. + + 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/>. */ + +#if CET_ENABLED +# include <sys/prctl.h> +# include <asm/prctl.h> + +static inline int __attribute__ ((always_inline)) +get_cet_status (void) +{ + unsigned long long cet_status[3]; + INTERNAL_SYSCALL_DECL (err); + if (INTERNAL_SYSCALL (arch_prctl, err, 2, ARCH_CET_STATUS, + cet_status) == 0) + return cet_status[0]; + return 0; +} + +# ifndef SHARED +static inline void +x86_setup_tls (void) +{ + __libc_setup_tls (); + THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1)[0]); +} + +# define ARCH_SETUP_TLS() x86_setup_tls () +# endif +#endif + +#include <sysdeps/x86/cpu-features.c> |