diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux')
-rw-r--r-- | sysdeps/unix/sysv/linux/x86/dl-hwcap2.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86/dl-hwcap2.h b/sysdeps/unix/sysv/linux/x86/dl-hwcap2.h new file mode 100644 index 0000000..28f38ea --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86/dl-hwcap2.h @@ -0,0 +1,27 @@ +/* Handle AT_HWCAP2. Linux/x86 version. + Copyright (C) 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/>. */ + +/* The following must match the kernel's <asm/hwcap2.h>. */ +#define HWCAP2_RING3MWAIT (1 << 0) +#define HWCAP2_FSGSBASE (1 << 1) + +static inline void +dl_check_hwcap2 (struct cpu_features *cpu_features) +{ + if ((GLRO(dl_hwcap2) & HWCAP2_FSGSBASE) != 0) + CPU_FEATURE_SET_ACTIVE (cpu_features, FSGSBASE); +} |