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.i7; 28 import static jdk.vm.ci.sparc.SPARCKind.XWORD; 29 30 import org.graalvm.compiler.asm.sparc.SPARCAssembler; 31 import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; 32 import org.graalvm.compiler.lir.LIRInstructionClass; 33 import org.graalvm.compiler.lir.Opcode; 34 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 35 import org.graalvm.compiler.lir.sparc.SPARCLIRInstruction; 36 37 import jdk.vm.ci.code.Register; 38 import jdk.vm.ci.meta.AllocatableValue; 39 40 /** 41 * Patch the return address of the current frame. 42 */ 43 @Opcode("PATCH_RETURN") 44 final class SPARCHotSpotPatchReturnAddressOp extends SPARCLIRInstruction { 45 public static final LIRInstructionClass<SPARCHotSpotPatchReturnAddressOp> TYPE = LIRInstructionClass.create(SPARCHotSpotPatchReturnAddressOp.class); 46 public static final SizeEstimate SIZE = SizeEstimate.create(1); 47 48 @Use(REG) AllocatableValue address; 49 50 SPARCHotSpotPatchReturnAddressOp(AllocatableValue address) { 51 super(TYPE, SIZE); 52 this.address = address; 53 } 54 55 @Override 56 public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { 57 Register addrRegister = asRegister(address, XWORD); 58 masm.sub(addrRegister, SPARCAssembler.PC_RETURN_OFFSET, i7); 59 } 60 }