aarch64-gcm-asm-compat.h

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* Compatibility macros for SLOTHY AES-GCM assembly files.

 * Replaces openssl/asm_base.h and openssl/arm_arch.h from aws-lc. */

#ifndef AARCH64_GCM_ASM_COMPAT_H

#define AARCH64_GCM_ASM_COMPAT_H

/* ARMv8 crypto extensions are required */

#ifndef __ARM_MAX_ARCH__

#define __ARM_MAX_ARCH__ 8

#endif

/* BTI (Branch Target Identification) - Armv8.5-A */

#if defined(__ARM_FEATURE_BTI_DEFAULT) && __ARM_FEATURE_BTI_DEFAULT == 1

#define AARCH64_VALID_CALL_TARGET hint #34

#else

#define AARCH64_VALID_CALL_TARGET

#endif

/* PAC (Pointer Authentication Code) - Armv8.3-A */

#if defined(__ARM_FEATURE_PAC_DEFAULT)

#if ((__ARM_FEATURE_PAC_DEFAULT & 1) != 0) /* A-key */

#define AARCH64_SIGN_LINK_REGISTER paciasp

#define AARCH64_VALIDATE_LINK_REGISTER autiasp

#elif ((__ARM_FEATURE_PAC_DEFAULT & 2) != 0) /* B-key */

#define AARCH64_SIGN_LINK_REGISTER pacibsp

#define AARCH64_VALIDATE_LINK_REGISTER autibsp

#else

#define AARCH64_SIGN_LINK_REGISTER

#define AARCH64_VALIDATE_LINK_REGISTER

#endif

#else

#define AARCH64_SIGN_LINK_REGISTER

#define AARCH64_VALIDATE_LINK_REGISTER

#endif

/* Mark ELF object files as not needing executable stack */

#if defined(__ELF__)

// clang-format off

.pushsection .note.GNU-stack,"",%progbits

.popsection

// clang-format on

#endif

#endif /* AARCH64_GCM_ASM_COMPAT_H */