1 /* 2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.hotspot.aarch64; 26 27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 28 import static jdk.vm.ci.aarch64.AArch64.sp; 29 import static jdk.vm.ci.code.ValueUtil.asRegister; 30 31 import org.graalvm.compiler.asm.aarch64.AArch64Address; 32 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 33 import org.graalvm.compiler.lir.LIRInstructionClass; 34 import org.graalvm.compiler.lir.Opcode; 35 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction; 36 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 37 38 import jdk.vm.ci.meta.AllocatableValue; 39 40 /** 41 * Patch the return address of the current frame. 42 */ 43 @Opcode("PATCH_RETURN") 44 final class AArch64HotSpotPatchReturnAddressOp extends AArch64LIRInstruction { 45 46 public static final LIRInstructionClass<AArch64HotSpotPatchReturnAddressOp> TYPE = LIRInstructionClass.create(AArch64HotSpotPatchReturnAddressOp.class); 47 48 @Use(REG) AllocatableValue address; 49 50 AArch64HotSpotPatchReturnAddressOp(AllocatableValue address) { 51 super(TYPE); 52 this.address = address; 53 } 54 55 @Override 56 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { 57 final int frameSize = crb.frameMap.frameSize(); 58 // LR is saved in the {fp, lr} pair above the frame 59 AArch64Address lrAddress = AArch64Address.createUnscaledImmediateAddress(sp, 60 frameSize + crb.target.wordSize); 61 masm.str(64, asRegister(address), lrAddress); 62 } 63 }