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.sparc; 26 27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 28 import static jdk.vm.ci.code.ValueUtil.asRegister; 29 import static jdk.vm.ci.sparc.SPARC.g0; 30 import static jdk.vm.ci.sparc.SPARC.l7; 31 import static jdk.vm.ci.sparc.SPARC.sp; 32 33 import org.graalvm.compiler.asm.sparc.SPARCAddress; 34 import org.graalvm.compiler.asm.sparc.SPARCAssembler.CC; 35 import org.graalvm.compiler.asm.sparc.SPARCAssembler.ConditionFlag; 36 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 37 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler.ScratchRegister; 38 import org.graalvm.compiler.lir.LIRInstructionClass; 39 import org.graalvm.compiler.lir.Opcode; 40 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 41 42 import jdk.vm.ci.code.Register; 43 import jdk.vm.ci.meta.AllocatableValue; 44 45 /** 46 * Sets up the arguments for an exception handler in the callers frame, removes the current frame 47 * and jumps to the handler. 48 */ 49 @Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER") 50 final class SPARCHotSpotJumpToExceptionHandlerInCallerOp extends SPARCHotSpotEpilogueOp { 51 52 public static final LIRInstructionClass<SPARCHotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(SPARCHotSpotJumpToExceptionHandlerInCallerOp.class); 53 public static final SizeEstimate SIZE = SizeEstimate.create(5); 54 55 @Use(REG) AllocatableValue handlerInCallerPc; 56 @Use(REG) AllocatableValue exception; 57 @Use(REG) AllocatableValue exceptionPc; 58 private final Register thread; 59 private final int isMethodHandleReturnOffset; 60 61 SPARCHotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread) { 62 super(TYPE, SIZE); 63 this.handlerInCallerPc = handlerInCallerPc; 64 this.exception = exception; 65 this.exceptionPc = exceptionPc; 66 this.isMethodHandleReturnOffset = isMethodHandleReturnOffset; 67 this.thread = thread; 68 } 69 70 @Override 71 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 72 // Restore SP from L7 if the exception PC is a method handle call site. 73 SPARCAddress dst = new SPARCAddress(thread, isMethodHandleReturnOffset); 74 try (ScratchRegister scratch = masm.getScratchRegister()) { 75 Register scratchReg = scratch.getRegister(); 76 masm.lduw(dst, scratchReg); 77 masm.cmp(scratchReg, scratchReg); 78 masm.movcc(ConditionFlag.NotZero, CC.Icc, l7, sp); 79 } 80 masm.jmpl(asRegister(handlerInCallerPc), 0, g0); 81 leaveFrame(crb); // Delay slot 82 } 83 }