diff options
Diffstat (limited to 'Documentation/arch/x86/x86_64/fsgs.rst')
| -rw-r--r-- | Documentation/arch/x86/x86_64/fsgs.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/arch/x86/x86_64/fsgs.rst b/Documentation/arch/x86/x86_64/fsgs.rst index 50960e09e1f6..6bda4d16d3f7 100644 --- a/Documentation/arch/x86/x86_64/fsgs.rst +++ b/Documentation/arch/x86/x86_64/fsgs.rst @@ -125,17 +125,17 @@ FSGSBASE instructions enablement FSGSBASE instructions compiler support ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -GCC version 4.6.4 and newer provide instrinsics for the FSGSBASE +GCC version 4.6.4 and newer provide intrinsics for the FSGSBASE instructions. Clang 5 supports them as well. =================== =========================== _readfsbase_u64() Read the FS base register - _readfsbase_u64() Read the GS base register + _readgsbase_u64() Read the GS base register _writefsbase_u64() Write the FS base register _writegsbase_u64() Write the GS base register =================== =========================== -To utilize these instrinsics <immintrin.h> must be included in the source +To utilize these intrinsics <immintrin.h> must be included in the source code and the compiler option -mfsgsbase has to be added. Compiler support for FS/GS based addressing |