mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 22:30:12 +00:00
674ea88294
1. Include <dl-procruntime.c> to get architecture specific initializer in rtld_global. 2. Change _dl_x86_feature_1[2] to _dl_x86_feature_1. 3. Add _dl_x86_feature_control after _dl_x86_feature_1, which is a struct of 2 bitfields for IBT and SHSTK control This fixes [BZ #25887].
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* Initialize CPU feature data for Linux/x86.
|
|
This file is part of the GNU C Library.
|
|
Copyright (C) 2018-2020 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 cet_status[3];
|
|
if (INTERNAL_SYSCALL_CALL (arch_prctl, 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));
|
|
}
|
|
|
|
# define ARCH_SETUP_TLS() x86_setup_tls ()
|
|
# endif
|
|
#endif
|
|
|
|
#include <sysdeps/x86/cpu-features.c>
|