1 /*
   2  * Copyright (c) 2013, 2018, 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 
  24 
  25 package org.graalvm.compiler.hotspot.aarch64;
  26 
  27 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
  28 import static jdk.vm.ci.aarch64.AArch64.r12;
  29 import static jdk.vm.ci.code.ValueUtil.asRegister;
  30 
  31 import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  32 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  33 import org.graalvm.compiler.lir.LIRFrameState;
  34 import org.graalvm.compiler.lir.LIRInstructionClass;
  35 import org.graalvm.compiler.lir.Opcode;
  36 import org.graalvm.compiler.lir.aarch64.AArch64Call;
  37 import org.graalvm.compiler.lir.aarch64.AArch64Call.IndirectCallOp;
  38 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  39 
  40 import jdk.vm.ci.code.Register;
  41 import jdk.vm.ci.meta.ResolvedJavaMethod;
  42 import jdk.vm.ci.meta.Value;
  43 
  44 /**
  45  * A register indirect call that complies with the extra conventions for such calls in HotSpot. In
  46  * particular, the metaspace Method of the callee must be in r12 for the case where a vtable entry's
  47  * _from_compiled_entry is the address of an C2I adapter. Such adapters expect the target method to
  48  * be in r12.
  49  */
  50 @Opcode("CALL_INDIRECT")
  51 final class AArch64IndirectCallOp extends IndirectCallOp {
  52 
  53     public static final LIRInstructionClass<AArch64IndirectCallOp> TYPE = LIRInstructionClass.create(AArch64IndirectCallOp.class);
  54 
  55     /**
  56      * Vtable stubs expect the metaspace Method in r12.
  57      */
  58     public static final Register METHOD = r12;
  59 
  60     @Use({REG}) private Value metaspaceMethod;
  61 
  62     private final GraalHotSpotVMConfig config;
  63 
  64     AArch64IndirectCallOp(ResolvedJavaMethod callTarget, Value result, Value[] parameters, Value[] temps, Value metaspaceMethod, Value targetAddress, LIRFrameState state,
  65                     GraalHotSpotVMConfig config) {
  66         super(TYPE, callTarget, result, parameters, temps, targetAddress, state);
  67         this.metaspaceMethod = metaspaceMethod;
  68         this.config = config;
  69     }
  70 
  71     @Override
  72     public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
  73         crb.recordMark(config.MARKID_INLINE_INVOKE);
  74         Register callReg = asRegister(targetAddress);
  75         assert !callReg.equals(METHOD);
  76         AArch64Call.indirectCall(crb, masm, callReg, callTarget, state);
  77     }
  78 
  79     @Override
  80     public void verify() {
  81         super.verify();
  82         assert asRegister(metaspaceMethod).equals(METHOD);
  83     }
  84 }