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package org.graalvm.compiler.hotspot.sparc;

import static org.graalvm.compiler.hotspot.HotSpotBackend.UNWIND_EXCEPTION_TO_CALLER;
import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
import static jdk.vm.ci.code.ValueUtil.asRegister;
import static jdk.vm.ci.sparc.SPARC.g5;
import static jdk.vm.ci.sparc.SPARC.i0;
import static jdk.vm.ci.sparc.SPARC.o0;
import static jdk.vm.ci.sparc.SPARC.o7;

import org.graalvm.compiler.asm.sparc.SPARCAssembler;
import org.graalvm.compiler.asm.sparc.SPARCMacroAssembler;
import org.graalvm.compiler.core.common.spi.ForeignCallLinkage;
import org.graalvm.compiler.hotspot.stubs.UnwindExceptionToCallerStub;
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 jdk.vm.ci.code.CallingConvention;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.RegisterValue;

Removes the current frame and jumps to the UnwindExceptionToCallerStub.
/** * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}. */
@Opcode("UNWIND") final class SPARCHotSpotUnwindOp extends SPARCHotSpotEpilogueOp { public static final LIRInstructionClass<SPARCHotSpotUnwindOp> TYPE = LIRInstructionClass.create(SPARCHotSpotUnwindOp.class); public static final SizeEstimate SIZE = SizeEstimate.create(32); @Use({REG}) protected RegisterValue exception; SPARCHotSpotUnwindOp(RegisterValue exception) { super(TYPE, SIZE); this.exception = exception; } @Override public void emitCode(CompilationResultBuilder crb, SPARCMacroAssembler masm) { // This Frame is left but the called unwind (which is sibling) method needs the exception as // input in i0 masm.mov(o0, i0); leaveFrame(crb); ForeignCallLinkage linkage = crb.foreignCalls.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER); CallingConvention cc = linkage.getOutgoingCallingConvention(); assert cc.getArgumentCount() == 2; assert exception.equals(cc.getArgument(0)); // Get return address (is in o7 after leave). Register returnAddress = asRegister(cc.getArgument(1)); masm.add(o7, SPARCAssembler.PC_RETURN_OFFSET, returnAddress); Register scratch = g5; SPARCCall.indirectJmp(crb, masm, scratch, linkage); } }