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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 14 | pmbaty | 1 | /*===------ cet.h -Control-flow Enforcement Technology feature ------------=== |
| 2 | * Add x86 feature with IBT and/or SHSTK bits to ELF program property if they |
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| 3 | * are enabled. Otherwise, contents in this header file are unused. This file |
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| 4 | * is mainly design for assembly source code which want to enable CET. |
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| 5 | * |
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| 6 | * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 7 | * See https://llvm.org/LICENSE.txt for license information. |
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| 8 | * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 9 | * |
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| 10 | *===-----------------------------------------------------------------------=== |
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| 11 | */ |
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| 12 | #ifndef __CET_H |
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| 13 | #define __CET_H |
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| 14 | |||
| 15 | #ifdef __ASSEMBLER__ |
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| 16 | |||
| 17 | #ifndef __CET__ |
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| 18 | # define _CET_ENDBR |
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| 19 | #endif |
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| 20 | |||
| 21 | #ifdef __CET__ |
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| 22 | |||
| 23 | # ifdef __LP64__ |
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| 24 | # if __CET__ & 0x1 |
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| 25 | # define _CET_ENDBR endbr64 |
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| 26 | # else |
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| 27 | # define _CET_ENDBR |
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| 28 | # endif |
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| 29 | # else |
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| 30 | # if __CET__ & 0x1 |
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| 31 | # define _CET_ENDBR endbr32 |
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| 32 | # else |
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| 33 | # define _CET_ENDBR |
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| 34 | # endif |
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| 35 | # endif |
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| 36 | |||
| 37 | |||
| 38 | # ifdef __LP64__ |
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| 39 | # define __PROPERTY_ALIGN 3 |
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| 40 | # else |
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| 41 | # define __PROPERTY_ALIGN 2 |
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| 42 | # endif |
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| 43 | |||
| 44 | .pushsection ".note.gnu.property", "a" |
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| 45 | .p2align __PROPERTY_ALIGN |
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| 46 | .long 1f - 0f /* name length. */ |
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| 47 | .long 4f - 1f /* data length. */ |
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| 48 | /* NT_GNU_PROPERTY_TYPE_0. */ |
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| 49 | .long 5 /* note type. */ |
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| 50 | 0: |
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| 51 | .asciz "GNU" /* vendor name. */ |
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| 52 | 1: |
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| 53 | .p2align __PROPERTY_ALIGN |
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| 54 | /* GNU_PROPERTY_X86_FEATURE_1_AND. */ |
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| 55 | .long 0xc0000002 /* pr_type. */ |
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| 56 | .long 3f - 2f /* pr_datasz. */ |
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| 57 | 2: |
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| 58 | /* GNU_PROPERTY_X86_FEATURE_1_XXX. */ |
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| 59 | .long __CET__ |
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| 60 | 3: |
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| 61 | .p2align __PROPERTY_ALIGN |
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| 62 | 4: |
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| 63 | .popsection |
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| 64 | #endif |
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| 65 | #endif |
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| 66 | #endif |