1 /* 2 * Copyright (c) 2016, 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 package org.graalvm.compiler.hotspot.aarch64; 24 25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import static jdk.vm.ci.aarch64.AArch64.sp; 27 import static jdk.vm.ci.code.ValueUtil.asRegister; 28 29 import org.graalvm.compiler.asm.aarch64.AArch64Address; 30 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 31 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler.AArch64ExceptionCode; 32 import org.graalvm.compiler.lir.LIRInstructionClass; 33 import org.graalvm.compiler.lir.Opcode; 34 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction; 35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 36 37 import jdk.vm.ci.meta.AllocatableValue; 38 39 /** 40 * Patch the return address of the current frame. 41 */ 42 @Opcode("PATCH_RETURN") 43 final class AArch64HotSpotPatchReturnAddressOp extends AArch64LIRInstruction { 44 45 public static final LIRInstructionClass<AArch64HotSpotPatchReturnAddressOp> TYPE = LIRInstructionClass.create(AArch64HotSpotPatchReturnAddressOp.class); 46 47 @Use(REG) AllocatableValue address; 48 49 AArch64HotSpotPatchReturnAddressOp(AllocatableValue address) { 50 super(TYPE); 51 this.address = address; 52 } 53 54 @Override 55 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { 56 final int frameSize = crb.frameMap.frameSize(); 57 // XXX where is lr exactly? 58 AArch64Address lrAddress = AArch64Address.createUnscaledImmediateAddress(sp, frameSize); 59 masm.brk(AArch64ExceptionCode.BREAKPOINT); // XXX 60 masm.str(64, asRegister(address), lrAddress); 61 } 62 }