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
18.macro startfn name:req
19	.globl \name
20\name:
21	.macro endfn
22		.size \name, . - \name
23		.type \name, @function
24		.purgem endfn
25	.endm
26.endm
27
28.macro emit_aarch64_feature_1_and
29	.pushsection .note.gnu.property, "a"
30	.align	3
31	.long	2f - 1f
32	.long	6f - 3f
33	.long	NT_GNU_PROPERTY_TYPE_0
341:	.string	"GNU"
352:
36	.align	3
373:	.long	GNU_PROPERTY_AARCH64_FEATURE_1_AND
38	.long	5f - 4f
394:
40#if BTI
41	.long	GNU_PROPERTY_AARCH64_FEATURE_1_PAC | \
42		GNU_PROPERTY_AARCH64_FEATURE_1_BTI
43#else
44	.long	0
45#endif
465:
47	.align	3
486:
49	.popsection
50.endm
51
52.macro paciasp
53	hint	0x19
54.endm
55
56.macro autiasp
57	hint	0x1d
58.endm
59
60.macro __bti_
61	hint	0x20
62.endm
63
64.macro __bti_c
65	hint	0x22
66.endm
67
68.macro __bti_j
69	hint	0x24
70.endm
71
72.macro __bti_jc
73	hint	0x26
74.endm
75
76.macro bti what=
77	__bti_\what
78.endm
79
80#endif /* ! ASSEMBLER_H */
81