Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/testing/selftests/arm64/bti/assembler.h
29270 views
1
/* SPDX-License-Identifier: GPL-2.0 */

2
/*

3
 * Copyright (C) 2019  Arm Limited

4
 * Original author: Dave Martin <[email protected]>

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

33
1:	.string	"GNU"

34
2:

35
	.align	3

36
3:	.long	GNU_PROPERTY_AARCH64_FEATURE_1_AND

37
	.long	5f - 4f

38
4:

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

45
5:

46
	.align	3

47
6:

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 */

80


81