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.hotspot.HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER; 26 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 27 import static jdk.vm.ci.amd64.AMD64.rsp; 28 import static jdk.vm.ci.code.ValueUtil.asRegister; 29 30 import org.graalvm.compiler.asm.amd64.AMD64Address; 31 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 32 import org.graalvm.compiler.core.common.spi.ForeignCallLinkage; 33 import org.graalvm.compiler.hotspot.stubs.UnwindExceptionToCallerStub; 34 import org.graalvm.compiler.lir.LIRInstructionClass; 35 import org.graalvm.compiler.lir.Opcode; 36 import org.graalvm.compiler.lir.amd64.AMD64Call; 37 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 38 39 import jdk.vm.ci.code.CallingConvention; 40 import jdk.vm.ci.code.Register; 41 import jdk.vm.ci.code.RegisterValue; 42 43 /** 44 * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}. 45 */ 46 @Opcode("UNWIND") 47 final class AMD64HotSpotUnwindOp extends AMD64HotSpotEpilogueBlockEndOp { 48 public static final LIRInstructionClass<AMD64HotSpotUnwindOp> TYPE = LIRInstructionClass.create(AMD64HotSpotUnwindOp.class); 49 50 @Use({REG}) protected RegisterValue exception; 51 52 AMD64HotSpotUnwindOp(RegisterValue exception) { 53 super(TYPE); 54 this.exception = exception; 55 } 56 57 @Override 58 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 59 leaveFrameAndRestoreRbp(crb, masm); 60 61 ForeignCallLinkage linkage = crb.foreignCalls.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER); 62 CallingConvention cc = linkage.getOutgoingCallingConvention(); 63 assert cc.getArgumentCount() == 2; 64 assert exception.equals(cc.getArgument(0)); 65 66 // Get return address (is on top of stack after leave). 67 Register returnAddress = asRegister(cc.getArgument(1)); 68 masm.movq(returnAddress, new AMD64Address(rsp, 0)); 69 70 AMD64Call.directJmp(crb, masm, linkage); 71 } 72 }