1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2018, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 26 package org.graalvm.compiler.hotspot.aarch64; 27 28 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 29 import static jdk.vm.ci.aarch64.AArch64.sp; 30 import static jdk.vm.ci.code.ValueUtil.asRegister; 31 32 import org.graalvm.compiler.asm.Label; 33 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 34 import org.graalvm.compiler.lir.LIRInstructionClass; 35 import org.graalvm.compiler.lir.Opcode; 36 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction; 37 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 38 39 import jdk.vm.ci.code.Register; 40 import jdk.vm.ci.meta.AllocatableValue; 41 42 @Opcode("CRUNTIME_CALL_PROLOGUE") 43 public class AArch64HotSpotCRuntimeCallPrologueOp extends AArch64LIRInstruction { 44 public static final LIRInstructionClass<AArch64HotSpotCRuntimeCallPrologueOp> TYPE = LIRInstructionClass.create(AArch64HotSpotCRuntimeCallPrologueOp.class); 45 46 private final int threadLastJavaSpOffset; 47 private final int threadLastJavaPcOffset; 48 private final Register thread; 49 @Temp({REG}) protected AllocatableValue scratch; 50 private final Label label; 51 52 public AArch64HotSpotCRuntimeCallPrologueOp(int threadLastJavaSpOffset, int threadLastJavaPcOffset, Register thread, AllocatableValue scratch, Label label) { 53 super(TYPE); 54 this.threadLastJavaSpOffset = threadLastJavaSpOffset; 55 this.threadLastJavaPcOffset = threadLastJavaPcOffset; 56 this.thread = thread; 57 this.scratch = scratch; 58 this.label = label; 59 } 60 61 @Override 62 public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) { 63 // Save last Java frame. 64 // We cannot save the SP directly so use a temporary register. 65 Register scratchRegister = asRegister(scratch); 66 masm.movx(scratchRegister, sp); 67 masm.str(64, scratchRegister, masm.makeAddress(thread, threadLastJavaSpOffset, 8)); 68 69 // Get the current PC. Use a label to patch the return address. 70 masm.adr(scratchRegister, label); 71 masm.str(64, scratchRegister, masm.makeAddress(thread, threadLastJavaPcOffset, 8)); 72 } 73 }