com.oracle.svm.graal.meta.aarch64

Class AArch64RuntimeCodeInstallerPlatformHelper

java.lang.Object

com.oracle.svm.graal.meta.aarch64.AArch64RuntimeCodeInstallerPlatformHelper

All Implemented Interfaces:

RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

public class AArch64RuntimeCodeInstallerPlatformHelper
extends Object
implements RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Constructor Summary

Constructors

Constructor and Description
AArch64RuntimeCodeInstallerPlatformHelper()

Method Summary

Modifier and Type	Method and Description
int	getTrampolineCallSize() The size for trampoline jumps.
int	insertTrampolineCalls(byte[] compiledBytes, int initialPos, Map<Long,Integer> directTargets)
void	performCodeSynchronization(CodeInfo codeInfo) Method to enable platforms to perform any needed operations before code becomes visible.
boolean	targetWithinPCDisplacement(long pcDisplacement) Checking if the pc displacement is within a signed 28 bit range.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AArch64RuntimeCodeInstallerPlatformHelper

public AArch64RuntimeCodeInstallerPlatformHelper()

Method Detail

getTrampolineCallSize

public int getTrampolineCallSize()

The size for trampoline jumps. The sequence of instructions is:

• adrp scratch, #offset:hi_21
• ldr scratch, [scratch{, #offset:lo_12}]
• br [scratch]

Trampoline jumps are added immediately after the method code, where each trampoline needs 12 bytes. The trampoline jumps reference the 8-byte destination addresses, which are allocated after the trampolines.

Specified by:

getTrampolineCallSize in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

targetWithinPCDisplacement

public boolean targetWithinPCDisplacement(long pcDisplacement)

Checking if the pc displacement is within a signed 28 bit range.

Specified by:

targetWithinPCDisplacement in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

insertTrampolineCalls

public int insertTrampolineCalls(byte[] compiledBytes,
                                 int initialPos,
                                 Map<Long,Integer> directTargets)

Specified by:

insertTrampolineCalls in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

performCodeSynchronization

public void performCodeSynchronization(CodeInfo codeInfo)

Description copied from interface: RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Method to enable platforms to perform any needed operations before code becomes visible.

Specified by:

performCodeSynchronization in interface RuntimeCodeInstaller.RuntimeCodeInstallerPlatformHelper

Parameters:

codeInfo - the new code to be installed