diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
| commit | cfca06d7963fa0909f90483b42a6d7d194d01e08 (patch) | |
| tree | 209fb2a2d68f8f277793fc8df46c753d31bc853b /clang/lib/Headers/cet.h | |
| parent | 706b4fc47bbc608932d3b491ae19a3b9cde9497b (diff) | |
Notes
Diffstat (limited to 'clang/lib/Headers/cet.h')
| -rw-r--r-- | clang/lib/Headers/cet.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/clang/lib/Headers/cet.h b/clang/lib/Headers/cet.h new file mode 100644 index 000000000000..ffb19dec8f2b --- /dev/null +++ b/clang/lib/Headers/cet.h @@ -0,0 +1,66 @@ +/*===------ cet.h -Control-flow Enforcement Technology feature ------------=== + * Add x86 feature with IBT and/or SHSTK bits to ELF program property if they + * are enabled. Otherwise, contents in this header file are unused. This file + * is mainly design for assembly source code which want to enable CET. + * + * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. + * See https://llvm.org/LICENSE.txt for license information. + * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception + * + *===-----------------------------------------------------------------------=== + */ +#ifndef __CET_H +#define __CET_H + +#ifdef __ASSEMBLER__ + +#ifndef __CET__ +# define _CET_ENDBR +#endif + +#ifdef __CET__ + +# ifdef __LP64__ +# if __CET__ & 0x1 +# define _CET_ENDBR endbr64 +# else +# define _CET_ENDBR +# endif +# else +# if __CET__ & 0x1 +# define _CET_ENDBR endbr32 +# else +# define _CET_ENDBR +# endif +# endif + + +# ifdef __LP64__ +# define __PROPERTY_ALIGN 3 +# else +# define __PROPERTY_ALIGN 2 +# endif + + .pushsection ".note.gnu.property", "a" + .p2align __PROPERTY_ALIGN + .long 1f - 0f /* name length. */ + .long 4f - 1f /* data length. */ + /* NT_GNU_PROPERTY_TYPE_0. */ + .long 5 /* note type. */ +0: + .asciz "GNU" /* vendor name. */ +1: + .p2align __PROPERTY_ALIGN + /* GNU_PROPERTY_X86_FEATURE_1_AND. */ + .long 0xc0000002 /* pr_type. */ + .long 3f - 2f /* pr_datasz. */ +2: + /* GNU_PROPERTY_X86_FEATURE_1_XXX. */ + .long __CET__ +3: + .p2align __PROPERTY_ALIGN +4: + .popsection +#endif +#endif +#endif |