1 /* 2 * Copyright (c) 2013, 2015, 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 jdk.vm.ci.amd64.AMD64.rdx; 26 27 import org.graalvm.compiler.asm.amd64.AMD64Address; 28 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 29 import org.graalvm.compiler.lir.LIRInstructionClass; 30 import org.graalvm.compiler.lir.Opcode; 31 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp; 32 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 33 import org.graalvm.compiler.lir.framemap.FrameMap; 34 35 import jdk.vm.ci.code.Register; 36 import jdk.vm.ci.code.RegisterConfig; 37 import jdk.vm.ci.code.RegisterSaveLayout; 38 import jdk.vm.ci.meta.JavaKind; 39 40 /** 41 * Pops the current frame off the stack including the return address and restores the return 42 * registers stored on the stack. 43 */ 44 @Opcode("LEAVE_CURRENT_STACK_FRAME") 45 final class AMD64HotSpotLeaveCurrentStackFrameOp extends AMD64HotSpotEpilogueOp { 46 47 public static final LIRInstructionClass<AMD64HotSpotLeaveCurrentStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotLeaveCurrentStackFrameOp.class); 48 49 private final SaveRegistersOp saveRegisterOp; 50 51 AMD64HotSpotLeaveCurrentStackFrameOp(SaveRegistersOp saveRegisterOp) { 52 super(TYPE); 53 this.saveRegisterOp = saveRegisterOp; 54 } 55 56 @Override 57 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 58 FrameMap frameMap = crb.frameMap; 59 RegisterConfig registerConfig = frameMap.getRegisterConfig(); 60 RegisterSaveLayout registerSaveLayout = saveRegisterOp.getMap(frameMap); 61 Register stackPointer = registerConfig.getFrameRegister(); 62 63 // Restore integer result register. 64 final int stackSlotSize = frameMap.getTarget().wordSize; 65 Register integerResultRegister = registerConfig.getReturnRegister(JavaKind.Long); 66 masm.movptr(integerResultRegister, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(integerResultRegister) * stackSlotSize)); 67 masm.movptr(rdx, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(rdx) * stackSlotSize)); 68 69 // Restore float result register. 70 Register floatResultRegister = registerConfig.getReturnRegister(JavaKind.Double); 71 masm.movdbl(floatResultRegister, new AMD64Address(stackPointer, registerSaveLayout.registerToSlot(floatResultRegister) * stackSlotSize)); 72 73 /* 74 * All of the register save area will be popped of the stack. Only the return address 75 * remains. 76 */ 77 leaveFrameAndRestoreRbp(crb, masm); 78 79 // Remove return address. 80 masm.addq(stackPointer, crb.target.arch.getReturnAddressSize()); 81 } 82 }