Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2019 Arm Limited
4 * Original author: Dave Martin <Dave.Martin@arm.com>
5 */
6
7#ifndef ASSEMBLER_H
8#define ASSEMBLER_H
9
10#define NT_GNU_PROPERTY_TYPE_0 5
11#define GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000
12
13/* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */
14#define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1U << 0)
15#define GNU_PROPERTY_AARCH64_FEATURE_1_PAC (1U << 1)
16
17.macro startfn name:req
18 .globl \name
19\name:
20 .macro endfn
21 .size \name, . - \name
22 .type \name, @function
23 .purgem endfn
24 .endm
25.endm
26
27.macro emit_aarch64_feature_1_and
28 .pushsection .note.gnu.property, "a"
29 .align 3
30 .long 2f - 1f
31 .long 6f - 3f
32 .long NT_GNU_PROPERTY_TYPE_0
331: .string "GNU"
342:
35 .align 3
363: .long GNU_PROPERTY_AARCH64_FEATURE_1_AND
37 .long 5f - 4f
384:
39#if BTI
40 .long GNU_PROPERTY_AARCH64_FEATURE_1_PAC | \
41 GNU_PROPERTY_AARCH64_FEATURE_1_BTI
42#else
43 .long 0
44#endif
455:
46 .align 3
476:
48 .popsection
49.endm
50
51.macro paciasp
52 hint 0x19
53.endm
54
55.macro autiasp
56 hint 0x1d
57.endm
58
59.macro __bti_
60 hint 0x20
61.endm
62
63.macro __bti_c
64 hint 0x22
65.endm
66
67.macro __bti_j
68 hint 0x24
69.endm
70
71.macro __bti_jc
72 hint 0x26
73.endm
74
75.macro bti what=
76 __bti_\what
77.endm
78
79#endif /* ! ASSEMBLER_H */