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.hotspot.HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER; 28 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 29 import static jdk.vm.ci.code.ValueUtil.asRegister; 30 import static jdk.vm.ci.sparc.SPARC.g5; 31 import static jdk.vm.ci.sparc.SPARC.i0; 32 import static jdk.vm.ci.sparc.SPARC.o0; 33 import static jdk.vm.ci.sparc.SPARC.o7; 34 35 import org.graalvm.compiler.asm.sparc.SPARCAssembler; 36 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 37 import org.graalvm.compiler.core.common.spi.ForeignCallLinkage; 38 import org.graalvm.compiler.hotspot.stubs.UnwindExceptionToCallerStub; 39 import org.graalvm.compiler.lir.LIRInstructionClass; 40 import org.graalvm.compiler.lir.Opcode; 41 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 42 import org.graalvm.compiler.lir.sparc.SPARCCall; 43 44 import jdk.vm.ci.code.CallingConvention; 45 import jdk.vm.ci.code.Register; 46 import jdk.vm.ci.code.RegisterValue; 47 48 /** 49 * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}. 50 */ 51 @Opcode("UNWIND") 52 final class SPARCHotSpotUnwindOp extends SPARCHotSpotEpilogueOp { 53 public static final LIRInstructionClass<SPARCHotSpotUnwindOp> TYPE = LIRInstructionClass.create(SPARCHotSpotUnwindOp.class); 54 public static final SizeEstimate SIZE = SizeEstimate.create(32); 55 56 @Use({REG}) protected RegisterValue exception; 57 58 SPARCHotSpotUnwindOp(RegisterValue exception) { 59 super(TYPE, SIZE); 60 this.exception = exception; 61 } 62 63 @Override 64 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 65 // This Frame is left but the called unwind (which is sibling) method needs the exception as 66 // input in i0 67 masm.mov(o0, i0); 68 leaveFrame(crb); 69 70 ForeignCallLinkage linkage = crb.foreignCalls.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER); 71 CallingConvention cc = linkage.getOutgoingCallingConvention(); 72 assert cc.getArgumentCount() == 2; 73 assert exception.equals(cc.getArgument(0)); 74 75 // Get return address (is in o7 after leave). 76 Register returnAddress = asRegister(cc.getArgument(1)); 77 masm.add(o7, SPARCAssembler.PC_RETURN_OFFSET, returnAddress); 78 Register scratch = g5; 79 SPARCCall.indirectJmp(crb, masm, scratch, linkage); 80 } 81 }