1 /* 2 * Copyright (c) 2013, 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 jdk.vm.ci.amd64.AMD64.rbp; 27 import static jdk.vm.ci.code.ValueUtil.asRegister; 28 29 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 30 import org.graalvm.compiler.lir.LIRInstructionClass; 31 import org.graalvm.compiler.lir.Opcode; 32 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 33 34 import jdk.vm.ci.code.Register; 35 import jdk.vm.ci.meta.AllocatableValue; 36 37 /** 38 * Pops a deoptimized stack frame off the stack including the return address. 39 */ 40 @Opcode("LEAVE_DEOPTIMIZED_STACK_FRAME") 41 final class AMD64HotSpotLeaveDeoptimizedStackFrameOp extends AMD64HotSpotEpilogueOp { 42 43 public static final LIRInstructionClass<AMD64HotSpotLeaveDeoptimizedStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotLeaveDeoptimizedStackFrameOp.class); 44 @Use(REG) AllocatableValue frameSize; 45 @Use(REG) AllocatableValue framePointer; 46 47 AMD64HotSpotLeaveDeoptimizedStackFrameOp(AllocatableValue frameSize, AllocatableValue initialInfo) { 48 super(TYPE); 49 this.frameSize = frameSize; 50 this.framePointer = initialInfo; 51 } 52 53 @Override 54 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 55 Register stackPointer = crb.frameMap.getRegisterConfig().getFrameRegister(); 56 masm.addq(stackPointer, asRegister(frameSize)); 57 58 /* 59 * Restore the frame pointer before stack bang because if a stack overflow is thrown it 60 * needs to be pushed (and preserved). 61 */ 62 masm.movq(rbp, asRegister(framePointer)); 63 } 64 }