001/*
002 * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.amd64;
024
025import jdk.internal.jvmci.code.*;
026import jdk.internal.jvmci.meta.*;
027import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
028import static jdk.internal.jvmci.amd64.AMD64.*;
029import static jdk.internal.jvmci.code.ValueUtil.*;
030
031import com.oracle.graal.asm.amd64.*;
032import com.oracle.graal.lir.*;
033import com.oracle.graal.lir.asm.*;
034
035/**
036 * Pops a deoptimized stack frame off the stack including the return address.
037 */
038@Opcode("LEAVE_DEOPTIMIZED_STACK_FRAME")
039final class AMD64HotSpotLeaveDeoptimizedStackFrameOp extends AMD64HotSpotEpilogueOp {
040
041    public static final LIRInstructionClass<AMD64HotSpotLeaveDeoptimizedStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotLeaveDeoptimizedStackFrameOp.class);
042    @Use(REG) AllocatableValue frameSize;
043    @Use(REG) AllocatableValue framePointer;
044
045    public AMD64HotSpotLeaveDeoptimizedStackFrameOp(AllocatableValue frameSize, AllocatableValue initialInfo, AllocatableValue savedRbp) {
046        super(TYPE, savedRbp);
047        this.frameSize = frameSize;
048        this.framePointer = initialInfo;
049    }
050
051    @Override
052    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
053        Register stackPointer = crb.frameMap.getRegisterConfig().getFrameRegister();
054        masm.addq(stackPointer, asRegister(frameSize));
055
056        /*
057         * Restore the frame pointer before stack bang because if a stack overflow is thrown it
058         * needs to be pushed (and preserved).
059         */
060        masm.movq(rbp, asRegister(framePointer));
061    }
062}