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/* Initialize CPU feature data for Linux/x86.
This file is part of the GNU C Library.
Copyright (C) 2018-2023 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
<https://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 kernel_feature;
unsigned int status = 0;
if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_STATUS,
&kernel_feature) == 0)
{
if ((kernel_feature & ARCH_SHSTK_SHSTK) != 0)
status = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
}
return status;
}
# ifndef SHARED
static inline void
x86_setup_tls (void)
{
__libc_setup_tls ();
THREAD_SETMEM (THREAD_SELF, header.feature_1, GL(dl_x86_feature_1));
}
# define ARCH_SETUP_TLS() x86_setup_tls ()
# endif
#endif
#include <sysdeps/x86/cpu-features.c>
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