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 org.graalvm.compiler.asm.amd64.AMD64Address; 26 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 27 import org.graalvm.compiler.hotspot.HotSpotBackend; 28 import org.graalvm.compiler.lir.LIRInstructionClass; 29 import org.graalvm.compiler.lir.Opcode; 30 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp; 31 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction; 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 * Emits code that leaves a stack frame which is tailored to call the C++ method 42 * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}. 43 */ 44 @Opcode("LEAVE_UNPACK_FRAMES_STACK_FRAME") 45 final class AMD64HotSpotLeaveUnpackFramesStackFrameOp extends AMD64LIRInstruction { 46 public static final LIRInstructionClass<AMD64HotSpotLeaveUnpackFramesStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotLeaveUnpackFramesStackFrameOp.class); 47 48 private final Register threadRegister; 49 private final int threadLastJavaSpOffset; 50 private final int threadLastJavaPcOffset; 51 private final int threadLastJavaFpOffset; 52 53 private final SaveRegistersOp saveRegisterOp; 54 55 AMD64HotSpotLeaveUnpackFramesStackFrameOp(Register threadRegister, int threadLastJavaSpOffset, int threadLastJavaPcOffset, int threadLastJavaFpOffset, SaveRegistersOp saveRegisterOp) { 56 super(TYPE); 57 this.threadRegister = threadRegister; 58 this.threadLastJavaSpOffset = threadLastJavaSpOffset; 59 this.threadLastJavaPcOffset = threadLastJavaPcOffset; 60 this.threadLastJavaFpOffset = threadLastJavaFpOffset; 61 this.saveRegisterOp = saveRegisterOp; 62 } 63 64 @Override 65 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 66 FrameMap frameMap = crb.frameMap; 67 RegisterConfig registerConfig = frameMap.getRegisterConfig(); 68 RegisterSaveLayout registerSaveLayout = saveRegisterOp.getMap(frameMap); 69 Register stackPointerRegister = registerConfig.getFrameRegister(); 70 71 // Restore stack pointer. 72 masm.movq(stackPointerRegister, new AMD64Address(threadRegister, threadLastJavaSpOffset)); 73 74 // Clear last Java frame values. 75 masm.movslq(new AMD64Address(threadRegister, threadLastJavaSpOffset), 0); 76 masm.movslq(new AMD64Address(threadRegister, threadLastJavaPcOffset), 0); 77 masm.movslq(new AMD64Address(threadRegister, threadLastJavaFpOffset), 0); 78 79 // Restore return values. 80 final int stackSlotSize = frameMap.getTarget().wordSize; 81 Register integerResultRegister = registerConfig.getReturnRegister(JavaKind.Long); 82 masm.movptr(integerResultRegister, new AMD64Address(stackPointerRegister, registerSaveLayout.registerToSlot(integerResultRegister) * stackSlotSize)); 83 84 Register floatResultRegister = registerConfig.getReturnRegister(JavaKind.Double); 85 masm.movdbl(floatResultRegister, new AMD64Address(stackPointerRegister, registerSaveLayout.registerToSlot(floatResultRegister) * stackSlotSize)); 86 } 87 }