//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Copyright (c) ChakraCore Project Contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------
// ARM64-specific macro definitions

#pragma once

#ifndef _M_ARM64
#error Include arm64.h in builds of ARM64 targets only.
#endif

#if defined(__getReg) || defined(_WIN64)
#define arm64_GET_CURRENT_FRAME() ((LPVOID)__getReg(29))
#else
extern "C" LPVOID arm64_GET_CURRENT_FRAME(void);
#endif

extern "C" VOID arm64_SAVE_REGISTERS(void*);

/*
 * The relevant part of the frame looks like this (high addresses at the top, low ones at the bottom):
 *
 * ----------------------
 * r3     <=== Homed input parameters
 * r2     <
 * r1     <
 * r0     <===
 * lr     <=== return address
 * r11    <=== current r11 (frame pointer)
 * ...
 */

const DWORD ReturnAddrOffsetFromFramePtr = 1;
#ifdef __linux__
// Linux ARM64 appears to have some extra 8 byte padding.
const DWORD ArgOffsetFromFramePtr = 4;
#else
const DWORD ArgOffsetFromFramePtr = 2;
#endif