1 /* 2 * Copyright (c) 2012, 2018, 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 24 25 package org.graalvm.compiler.hotspot.amd64; 26 27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 28 import static jdk.vm.ci.amd64.AMD64.rbp; 29 import static jdk.vm.ci.amd64.AMD64.rsp; 30 import static jdk.vm.ci.code.ValueUtil.asRegister; 31 32 import org.graalvm.compiler.asm.amd64.AMD64Address; 33 import org.graalvm.compiler.asm.amd64.AMD64Assembler.ConditionFlag; 34 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler; 35 import org.graalvm.compiler.lir.LIRInstructionClass; 36 import org.graalvm.compiler.lir.Opcode; 37 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 38 import org.graalvm.compiler.serviceprovider.GraalServices; 39 40 import jdk.vm.ci.code.Register; 41 import jdk.vm.ci.meta.AllocatableValue; 42 43 /** 44 * Sets up the arguments for an exception handler in the callers frame, removes the current frame 45 * and jumps to the handler. 46 */ 47 @Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER") 48 final class AMD64HotSpotJumpToExceptionHandlerInCallerOp extends AMD64HotSpotEpilogueBlockEndOp { 49 50 public static final LIRInstructionClass<AMD64HotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(AMD64HotSpotJumpToExceptionHandlerInCallerOp.class); 51 52 @Use(REG) AllocatableValue handlerInCallerPc; 53 @Use(REG) AllocatableValue exception; 54 @Use(REG) AllocatableValue exceptionPc; 55 private final Register thread; 56 private final int isMethodHandleReturnOffset; 57 58 AMD64HotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread) { 59 super(TYPE); 60 this.handlerInCallerPc = handlerInCallerPc; 61 this.exception = exception; 62 this.exceptionPc = exceptionPc; 63 this.isMethodHandleReturnOffset = isMethodHandleReturnOffset; 64 this.thread = thread; 65 } 66 67 @Override 68 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) { 69 leaveFrameAndRestoreRbp(crb, masm); 70 71 // Discard the return address, thus completing restoration of caller frame 72 masm.incrementq(rsp, 8); 73 74 if (GraalServices.JAVA_SPECIFICATION_VERSION < 8) { 75 // Restore rsp from rbp if the exception PC is a method handle call site. 76 AMD64Address dst = new AMD64Address(thread, isMethodHandleReturnOffset); 77 masm.cmpl(dst, 0); 78 masm.cmovq(ConditionFlag.NotEqual, rsp, rbp); 79 } 80 81 masm.jmp(asRegister(handlerInCallerPc)); 82 } 83 }