| /* |
| * Copyright (c) 2013, 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.lir.LIRInstruction.OperandFlag.REG; |
| import static jdk.vm.ci.aarch64.AArch64.sp; |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.hotspot.aarch64.AArch64HotSpotRegisterConfig.fp; |
| |
| import org.graalvm.compiler.asm.Label; |
| import org.graalvm.compiler.asm.aarch64.AArch64Address; |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; |
| import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler.ScratchRegister; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.meta.AllocatableValue; |
| |
| /** |
| * Sets up the arguments for an exception handler in the callers frame, removes the current frame |
| * and jumps to the handler. |
| */ |
| @Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER") |
| public class AArch64HotSpotJumpToExceptionHandlerInCallerOp extends AArch64HotSpotEpilogueOp { |
| |
| public static final LIRInstructionClass<AArch64HotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(AArch64HotSpotJumpToExceptionHandlerInCallerOp.class); |
| |
| @Use(REG) private AllocatableValue handlerInCallerPc; |
| @Use(REG) private AllocatableValue exception; |
| @Use(REG) private AllocatableValue exceptionPc; |
| private final Register thread; |
| private final int isMethodHandleReturnOffset; |
| |
| public AArch64HotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, |
| Register thread, GraalHotSpotVMConfig config) { |
| super(TYPE, config); |
| this.handlerInCallerPc = handlerInCallerPc; |
| this.exception = exception; |
| this.exceptionPc = exceptionPc; |
| this.isMethodHandleReturnOffset = isMethodHandleReturnOffset; |
| this.thread = thread; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { |
| leaveFrame(crb, masm, /* emitSafepoint */false); |
| |
| // Restore sp from fp if the exception PC is a method handle call site. |
| try (ScratchRegister sc = masm.getScratchRegister()) { |
| Register scratch = sc.getRegister(); |
| AArch64Address address = masm.makeAddress(thread, isMethodHandleReturnOffset, scratch, 4, /* allowOverwrite */false); |
| masm.ldr(32, scratch, address); |
| Label noRestore = new Label(); |
| masm.cbz(32, scratch, noRestore); |
| masm.mov(64, sp, fp); |
| masm.bind(noRestore); |
| } |
| masm.jmp(asRegister(handlerInCallerPc)); |
| } |
| } |