1 /* 2 * Copyright (c) 2012, 2015, 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.sparc; 24 25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import static jdk.vm.ci.code.ValueUtil.asRegister; 27 import static jdk.vm.ci.sparc.SPARC.g0; 28 import static jdk.vm.ci.sparc.SPARC.l7; 29 import static jdk.vm.ci.sparc.SPARC.sp; 30 31 import org.graalvm.compiler.asm.sparc.SPARCAddress; 32 import org.graalvm.compiler.asm.sparc.SPARCAssembler.CC; 33 import org.graalvm.compiler.asm.sparc.SPARCAssembler.ConditionFlag; 34 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 35 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler.ScratchRegister; 36 import org.graalvm.compiler.lir.LIRInstructionClass; 37 import org.graalvm.compiler.lir.Opcode; 38 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 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 SPARCHotSpotJumpToExceptionHandlerInCallerOp extends SPARCHotSpotEpilogueOp { 49 50 public static final LIRInstructionClass<SPARCHotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(SPARCHotSpotJumpToExceptionHandlerInCallerOp.class); 51 public static final SizeEstimate SIZE = SizeEstimate.create(5); 52 53 @Use(REG) AllocatableValue handlerInCallerPc; 54 @Use(REG) AllocatableValue exception; 55 @Use(REG) AllocatableValue exceptionPc; 56 private final Register thread; 57 private final int isMethodHandleReturnOffset; 58 59 SPARCHotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread) { 60 super(TYPE, SIZE); 61 this.handlerInCallerPc = handlerInCallerPc; 62 this.exception = exception; 63 this.exceptionPc = exceptionPc; 64 this.isMethodHandleReturnOffset = isMethodHandleReturnOffset; 65 this.thread = thread; 66 } 67 68 @Override 69 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 70 // Restore SP from L7 if the exception PC is a method handle call site. 71 SPARCAddress dst = new SPARCAddress(thread, isMethodHandleReturnOffset); 72 try (ScratchRegister scratch = masm.getScratchRegister()) { 73 Register scratchReg = scratch.getRegister(); 74 masm.lduw(dst, scratchReg); 75 masm.cmp(scratchReg, scratchReg); 76 masm.movcc(ConditionFlag.NotZero, CC.Icc, l7, sp); 77 } 78 masm.jmpl(asRegister(handlerInCallerPc), 0, g0); 79 leaveFrame(crb); // Delay slot 80 } 81 }