| /* |
| * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package org.graalvm.compiler.hotspot.sparc; |
| |
| import static jdk.vm.ci.sparc.SPARC.sp; |
| import static org.graalvm.compiler.hotspot.HotSpotHostBackend.ENABLE_STACK_RESERVED_ZONE; |
| import static org.graalvm.compiler.hotspot.HotSpotHostBackend.THROW_DELAYED_STACKOVERFLOW_ERROR; |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.ILLEGAL; |
| import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; |
| |
| import org.graalvm.compiler.asm.Label; |
| import org.graalvm.compiler.asm.sparc.SPARCAddress; |
| import org.graalvm.compiler.asm.sparc.SPARCAssembler; |
| import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler; |
| import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler.ScratchRegister; |
| import org.graalvm.compiler.core.common.spi.ForeignCallLinkage; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.hotspot.meta.HotSpotForeignCallsProvider; |
| import org.graalvm.compiler.lir.LIRInstructionClass; |
| import org.graalvm.compiler.lir.Opcode; |
| import org.graalvm.compiler.lir.asm.CompilationResultBuilder; |
| import org.graalvm.compiler.lir.sparc.SPARCCall; |
| import org.graalvm.compiler.lir.sparc.SPARCControlFlow.ReturnOp; |
| |
| import jdk.vm.ci.code.CallingConvention; |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.RegisterValue; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Returns from a function. |
| */ |
| @Opcode("RETURN") |
| final class SPARCHotSpotReturnOp extends SPARCHotSpotEpilogueOp { |
| public static final LIRInstructionClass<SPARCHotSpotReturnOp> TYPE = LIRInstructionClass.create(SPARCHotSpotReturnOp.class); |
| public static final SizeEstimate SIZE = SizeEstimate.create(2); |
| |
| @Use({REG, ILLEGAL}) protected Value value; |
| @Use({REG, ILLEGAL}) protected Value safepointPollAddress; |
| private final boolean requiresReservedStackAccessCheck; |
| private final boolean isStub; |
| private final GraalHotSpotVMConfig config; |
| private final Register thread; |
| |
| SPARCHotSpotReturnOp(Value value, boolean isStub, GraalHotSpotVMConfig config, Register thread, Value safepointPoll, boolean requiresReservedStackAccessCheck) { |
| super(TYPE, SIZE); |
| this.value = value; |
| this.isStub = isStub; |
| this.config = config; |
| this.thread = thread; |
| this.safepointPollAddress = safepointPoll; |
| this.requiresReservedStackAccessCheck = requiresReservedStackAccessCheck; |
| } |
| |
| @Override |
| public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { |
| if (!isStub) { |
| if (requiresReservedStackAccessCheck) { |
| try (ScratchRegister sc = masm.getScratchRegister()) { |
| HotSpotForeignCallsProvider foreignCalls = (HotSpotForeignCallsProvider) crb.foreignCalls; |
| Label noReserved = new Label(); |
| Register scratch = sc.getRegister(); |
| masm.ldx(new SPARCAddress(thread, config.javaThreadReservedStackActivationOffset), scratch); |
| masm.compareBranch(sp, scratch, SPARCAssembler.ConditionFlag.LessUnsigned, SPARCAssembler.CC.Xcc, noReserved, SPARCAssembler.BranchPredict.PREDICT_TAKEN, null); |
| ForeignCallLinkage enableStackReservedZone = foreignCalls.lookupForeignCall(ENABLE_STACK_RESERVED_ZONE); |
| CallingConvention cc = enableStackReservedZone.getOutgoingCallingConvention(); |
| assert cc.getArgumentCount() == 1; |
| Register arg0 = ((RegisterValue) cc.getArgument(0)).getRegister(); |
| masm.mov(thread, arg0); |
| SPARCCall.directCall(crb, masm, enableStackReservedZone, scratch, null); |
| masm.restoreWindow(); |
| SPARCCall.indirectJmp(crb, masm, scratch, foreignCalls.lookupForeignCall(THROW_DELAYED_STACKOVERFLOW_ERROR)); |
| masm.bind(noReserved); |
| } |
| } |
| // Every non-stub compile method must have a poll before the return. |
| SPARCHotSpotSafepointOp.emitCode(crb, masm, config, true, null, thread, safepointPollAddress); |
| } |
| ReturnOp.emitCodeHelper(crb, masm); |
| } |
| } |