1 /* 2 * Copyright (c) 2013, 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.aarch64; 24 25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG; 26 import static jdk.vm.ci.aarch64.AArch64.sp; 27 import static jdk.vm.ci.code.ValueUtil.asRegister; 28 import static jdk.vm.ci.hotspot.aarch64.AArch64HotSpotRegisterConfig.fp; 29 30 import org.graalvm.compiler.asm.Label; 31 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler; 32 import org.graalvm.compiler.lir.LIRInstructionClass; 33 import org.graalvm.compiler.lir.Opcode; 34 import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction; 35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder; 36 37 import jdk.vm.ci.code.Register; 38 import jdk.vm.ci.meta.AllocatableValue; 39 40 @Opcode("CRUNTIME_CALL_PROLOGUE") 41 public class AArch64HotSpotCRuntimeCallPrologueOp extends AArch64LIRInstruction { 42 public static final LIRInstructionClass<AArch64HotSpotCRuntimeCallPrologueOp> TYPE = LIRInstructionClass.create(AArch64HotSpotCRuntimeCallPrologueOp.class); 43 44 private final int threadLastJavaSpOffset; 45 private final int threadLastJavaPcOffset; 46 private final int threadLastJavaFpOffset; 47 private final Register thread; 48 @Temp({REG}) protected AllocatableValue scratch; 49 private final Label label; 50 51 public AArch64HotSpotCRuntimeCallPrologueOp(int threadLastJavaSpOffset, int threadLastJavaPcOffset, int threadLastJavaFpOffset, Register thread, AllocatableValue scratch, Label label) { 52 super(TYPE); 53 this.threadLastJavaSpOffset = threadLastJavaSpOffset; 54 this.threadLastJavaPcOffset = threadLastJavaPcOffset; 55 this.threadLastJavaFpOffset = threadLastJavaFpOffset; 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 masm.str(64, fp, masm.makeAddress(thread, threadLastJavaFpOffset, 8)); 74 } 75 }