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 */
23package org.graalvm.compiler.hotspot.aarch64;
24
25import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
26import static jdk.vm.ci.aarch64.AArch64.sp;
27import static jdk.vm.ci.code.ValueUtil.asRegister;
28import static jdk.vm.ci.hotspot.aarch64.AArch64HotSpotRegisterConfig.fp;
29
30import org.graalvm.compiler.asm.Label;
31import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
32import org.graalvm.compiler.lir.LIRInstructionClass;
33import org.graalvm.compiler.lir.Opcode;
34import org.graalvm.compiler.lir.aarch64.AArch64LIRInstruction;
35import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
36
37import jdk.vm.ci.code.Register;
38import jdk.vm.ci.meta.AllocatableValue;
39
40@Opcode("CRUNTIME_CALL_PROLOGUE")
41public 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}
76