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  */
  23 package org.graalvm.compiler.hotspot.amd64;
  24 
  25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
  26 import static jdk.vm.ci.code.ValueUtil.asRegister;
  27 
  28 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
  29 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  30 import org.graalvm.compiler.lir.LIRFrameState;
  31 import org.graalvm.compiler.lir.LIRInstructionClass;
  32 import org.graalvm.compiler.lir.Opcode;
  33 import org.graalvm.compiler.lir.amd64.AMD64Call;
  34 import org.graalvm.compiler.lir.amd64.AMD64Call.IndirectCallOp;
  35 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  36 
  37 import jdk.vm.ci.amd64.AMD64;
  38 import jdk.vm.ci.code.Register;
  39 import jdk.vm.ci.meta.ResolvedJavaMethod;
  40 import 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")
  49 final 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 }