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.i7; 30 import static jdk.vm.ci.sparc.SPARCKind.XWORD; 31 32 import org.graalvm.compiler.asm.sparc.SPARCAssembler; 33 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 34 import org.graalvm.compiler.lir.LIRInstructionClass; 35 import org.graalvm.compiler.lir.Opcode; 36 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 37 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction; 38 39 import jdk.vm.ci.code.Register; 40 import jdk.vm.ci.meta.AllocatableValue; 41 42 /** 43 * Patch the return address of the current frame. 44 */ 45 @Opcode("PATCH_RETURN") 46 final class SPARCHotSpotPatchReturnAddressOp extends SPARCLIRInstruction { 47 public static final LIRInstructionClass<SPARCHotSpotPatchReturnAddressOp> TYPE = LIRInstructionClass.create(SPARCHotSpotPatchReturnAddressOp.class); 48 public static final SizeEstimate SIZE = SizeEstimate.create(1); 49 50 @Use(REG) AllocatableValue address; 51 52 SPARCHotSpotPatchReturnAddressOp(AllocatableValue address) { 53 super(TYPE, SIZE); 54 this.address = address; 55 } 56 57 @Override 58 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 59 Register addrRegister = asRegister(address, XWORD); 60 masm.sub(addrRegister, SPARCAssembler.PC_RETURN_OFFSET, i7); 61 } 62 }