1 /* 2 * Copyright (c) 2012, 2014, 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.amd64; 24 25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.STACK; 27 import static jdk.vm.ci.amd64.AMD64.rbp; 28 import static jdk.vm.ci.code.ValueUtil.asRegister; 29 import static jdk.vm.ci.code.ValueUtil.isStackSlot; 30 31 import org.graalvm.compiler.asm.amd64.AMD64Address; 32 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 33 import org.graalvm.compiler.lir.LIRInstructionClass; 34 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction; 35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 36 37 import jdk.vm.ci.code.Register; 38 import jdk.vm.ci.meta.AllocatableValue; 39 40 /** 41 * Superclass for operations that use the value of RBP saved in a method's prologue. 42 */ 43 abstract class AMD64HotSpotEpilogueOp extends AMD64LIRInstruction implements AMD64HotSpotRestoreRbpOp { 44 45 protected AMD64HotSpotEpilogueOp(LIRInstructionClass<? extends AMD64HotSpotEpilogueOp> c) { 46 super(c); 47 } 48 49 @Use({REG, STACK}) private AllocatableValue savedRbp = PLACEHOLDER; 50 51 protected void leaveFrameAndRestoreRbp(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 52 leaveFrameAndRestoreRbp(savedRbp, crb, masm); 53 } 54 55 static void leaveFrameAndRestoreRbp(AllocatableValue savedRbp, CompilationResultBuilder crb, AMD64MacroAssembler masm) { 56 if (isStackSlot(savedRbp)) { 57 // Restoring RBP from the stack must be done before the frame is removed 58 masm.movq(rbp, (AMD64Address) crb.asAddress(savedRbp)); 59 } else { 60 Register framePointer = asRegister(savedRbp); 61 if (!framePointer.equals(rbp)) { 62 masm.movq(rbp, framePointer); 63 } 64 } 65 crb.frameContext.leave(crb); 66 } 67 68 @Override 69 public void setSavedRbp(AllocatableValue value) { 70 savedRbp = value; 71 } 72 }