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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019 Arm Limited
* Original author: Dave Martin <Dave.Martin@arm.com>
*/
#ifndef ASSEMBLER_H
#define ASSEMBLER_H
#define NT_GNU_PROPERTY_TYPE_0 5
#define GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000
/* Bits for GNU_PROPERTY_AARCH64_FEATURE_1_BTI */
#define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1U << 0)
#define GNU_PROPERTY_AARCH64_FEATURE_1_PAC (1U << 1)
.macro startfn name:req
.globl \name
\name:
.macro endfn
.size \name, . - \name
.type \name, @function
.purgem endfn
.endm
.endm
.macro emit_aarch64_feature_1_and
.pushsection .note.gnu.property, "a"
.align 3
.long 2f - 1f
.long 6f - 3f
.long NT_GNU_PROPERTY_TYPE_0
1: .string "GNU"
2:
.align 3
3: .long GNU_PROPERTY_AARCH64_FEATURE_1_AND
.long 5f - 4f
4:
#if BTI
.long GNU_PROPERTY_AARCH64_FEATURE_1_PAC | \
GNU_PROPERTY_AARCH64_FEATURE_1_BTI
#else
.long 0
#endif
5:
.align 3
6:
.popsection
.endm
.macro paciasp
hint 0x19
.endm
.macro autiasp
hint 0x1d
.endm
.macro __bti_
hint 0x20
.endm
.macro __bti_c
hint 0x22
.endm
.macro __bti_j
hint 0x24
.endm
.macro __bti_jc
hint 0x26
.endm
.macro bti what=
__bti_\what
.endm
#endif /* ! ASSEMBLER_H */
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