/* 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 */