1/*
2 * Copyright (c) 2012, 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.amd64;
24
25import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
26import static jdk.vm.ci.code.ValueUtil.asRegister;
27
28import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
29import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
30import org.graalvm.compiler.lir.LIRFrameState;
31import org.graalvm.compiler.lir.LIRInstructionClass;
32import org.graalvm.compiler.lir.Opcode;
33import org.graalvm.compiler.lir.amd64.AMD64Call;
34import org.graalvm.compiler.lir.amd64.AMD64Call.IndirectCallOp;
35import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
36
37import jdk.vm.ci.amd64.AMD64;
38import jdk.vm.ci.code.Register;
39import jdk.vm.ci.meta.ResolvedJavaMethod;
40import jdk.vm.ci.meta.Value;
41
42/**
43 * A register indirect call that complies with the extra conventions for such calls in HotSpot. In
44 * particular, the metaspace Method of the callee must be in RBX for the case where a vtable entry's
45 * _from_compiled_entry is the address of an C2I adapter. Such adapters expect the target method to
46 * be in RBX.
47 */
48@Opcode("CALL_INDIRECT")
49final class AMD64IndirectCallOp extends IndirectCallOp {
50    public static final LIRInstructionClass<AMD64IndirectCallOp> TYPE = LIRInstructionClass.create(AMD64IndirectCallOp.class);
51
52    /**
53     * Vtable stubs expect the metaspace Method in RBX.
54     */
55    public static final Register METHOD = AMD64.rbx;
56
57    @Use({REG}) protected Value metaspaceMethod;
58
59    private final GraalHotSpotVMConfig config;
60
61    AMD64IndirectCallOp(ResolvedJavaMethod targetMethod, Value result, Value[] parameters, Value[] temps, Value metaspaceMethod, Value targetAddress, LIRFrameState state,
62                    GraalHotSpotVMConfig config) {
63        super(TYPE, targetMethod, result, parameters, temps, targetAddress, state);
64        this.metaspaceMethod = metaspaceMethod;
65        this.config = config;
66    }
67
68    @Override
69    public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
70        crb.recordMark(config.MARKID_INLINE_INVOKE);
71        Register callReg = asRegister(targetAddress);
72        assert !callReg.equals(METHOD);
73        AMD64Call.indirectCall(crb, masm, callReg, callTarget, state);
74    }
75
76    @Override
77    public void verify() {
78        super.verify();
79        assert asRegister(metaspaceMethod).equals(METHOD);
80    }
81}
82