| /* |
| * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.hotspot.aarch64; |
| |
| import static org.graalvm.compiler.hotspot.HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER; |
| import static jdk.vm.ci.aarch64.AArch64.lr; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; |
| import org.graalvm.compiler.core.common.spi.ForeignCallLinkage; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.hotspot.stubs.UnwindExceptionToCallerStub; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.aarch64.AArch64Call; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.code.CallingConvention; |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.RegisterValue; |
| |
| /** |
| * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}. |
| */ |
| @Opcode("UNWIND") |
| public final class AArch64HotSpotUnwindOp extends AArch64HotSpotEpilogueOp { |
| public static final LIRInstructionClass<AArch64HotSpotUnwindOp> TYPE = LIRInstructionClass.create(AArch64HotSpotUnwindOp.class); |
| |
| @Use protected RegisterValue exception; |
| |
| public AArch64HotSpotUnwindOp(GraalHotSpotVMConfig config, RegisterValue exception) { |
| super(TYPE, config); |
| this.exception = exception; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| leaveFrame(crb, masm, /* emitSafepoint */false); |
| |
| ForeignCallLinkage linkage = crb.foreignCalls.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER); |
| CallingConvention cc = linkage.getOutgoingCallingConvention(); |
| assert cc.getArgumentCount() == 2; |
| assert exception.equals(cc.getArgument(0)); |
| |
| // Get return address (is in lr after frame leave) |
| Register returnAddress = asRegister(cc.getArgument(1)); |
| masm.movx(returnAddress, lr); |
| |
| AArch64Call.directJmp(crb, masm, linkage); |
| } |
| } |