mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-30 21:00:30 +00:00
245 lines
14 KiB
C#
245 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using CPU = Indy.IL2CPU.Assembler;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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using System.Reflection;
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using Indy.IL2CPU.Assembler;
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using Indy.IL2CPU.Compiler;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(OpCodeEnum.Callvirt)]
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public class Callvirt : Op {
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private string mMethodIdentifier;
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private string mNormalAddress;
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private string mMethodDescription;
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private int mThisOffset;
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private uint mArgumentCount;
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private uint mReturnSize;
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private string mLabelName;
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private MethodInformation mCurrentMethodInfo;
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private MethodInformation mTargetMethodInfo;
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private uint mCurrentILOffset;
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private int mExtraStackSpace;
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private MethodBase mMethod;
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public static void ScanOp(ILReader aReader,
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MethodInformation aMethodInfo,
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SortedList<string, object> aMethodData,
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IServiceProvider aServiceProvider)
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{
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MethodBase xMethod = aReader.OperandValueMethod;
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if (xMethod == null)
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{
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throw new Exception("Unable to determine Method!");
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}
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MethodBase xMethodDef = xMethod;
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var xTargetMethodInfo = aServiceProvider.GetService<IMetaDataInfoService>().GetMethodInfo(xMethodDef,
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false);
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foreach (var xParam in xMethodDef.GetParameters())
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{
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Engine.RegisterType(xParam.ParameterType);
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}
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aServiceProvider.GetService<IMetaDataInfoService>().GetTypeInfo(xTargetMethodInfo.ReturnType);
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aServiceProvider.GetService<IMetaDataInfoService>().GetMethodInfo(xMethodDef, false);
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aServiceProvider.GetService<IMetaDataInfoService>().GetMethodInfo(VTablesImplRefs.GetMethodAddressForTypeRef, false);
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aServiceProvider.GetService<IMetaDataInfoService>().GetMethodInfo(typeof(NullReferenceException).GetConstructor(new Type[0]), false);
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aServiceProvider.GetService<IMetaDataInfoService>().GetMethodInfo(
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CPU.Assembler.CurrentExceptionOccurredRef, false);
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aServiceProvider.GetService<IMetaDataInfoService>().GetTypeInfo(typeof (NullReferenceException));
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}
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public Callvirt(ILReader aReader,
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MethodInformation aMethodInfo)
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: base(aReader,
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aMethodInfo) {
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mLabelName = GetInstructionLabel(aReader);
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mCurrentMethodInfo = aMethodInfo;
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mMethod = aReader.OperandValueMethod;
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if (mMethod == null) {
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throw new Exception("Unable to determine Method!");
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}
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mCurrentILOffset = aReader.Position;
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}
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public override void DoAssemble() {
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mMethodDescription = CPU.MethodInfoLabelGenerator.GenerateLabelName(mMethod);
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mTargetMethodInfo = GetService<IMetaDataInfoService>().GetMethodInfo(mMethod,
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mMethod,
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mMethodDescription,
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null,
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mCurrentMethodInfo.DebugMode);
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if (mMethod.IsStatic || !mMethod.IsVirtual || mMethod.IsFinal)
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{
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mNormalAddress = CPU.MethodInfoLabelGenerator.GenerateLabelName(mMethod);
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}
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mMethodIdentifier = GetService<IMetaDataInfoService>().GetMethodIdLabel(mMethod);
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mArgumentCount = (uint)mTargetMethodInfo.Arguments.Length;
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mReturnSize = mTargetMethodInfo.ReturnSize;
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mThisOffset = mTargetMethodInfo.Arguments[0].Offset;
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if (mTargetMethodInfo.ExtraStackSize > 0)
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{
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mThisOffset -= mTargetMethodInfo.ExtraStackSize;
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}
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mExtraStackSpace = mTargetMethodInfo.ExtraStackSize;
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new Comment("ThisOffset = " + mThisOffset);
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Action xEmitCleanup = delegate() {
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foreach (MethodInformation.Argument xArg in mTargetMethodInfo.Arguments) {
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = xArg.Size };
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}
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};
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if (!String.IsNullOrEmpty(mNormalAddress)) {
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EmitCompareWithNull(Assembler,
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mCurrentMethodInfo,
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delegate(CPUx86.Compare c){
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c.DestinationReg = CPUx86.Registers.ESP;
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c.DestinationIsIndirect = true;
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c.DestinationDisplacement = mThisOffset;
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},
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mLabelName,
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mLabelName + "_AfterNullRefCheck",
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xEmitCleanup,
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(int)mCurrentILOffset,
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GetService<IMetaDataInfoService>().GetTypeIdLabel(typeof(NullReferenceException)),
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GetService<IMetaDataInfoService>().GetTypeInfo(typeof(NullReferenceException)),
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GetService<IMetaDataInfoService>().GetMethodInfo(typeof(NullReferenceException).GetConstructor(Type.EmptyTypes), false),
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GetServiceProvider()
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);
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new CPU.Label(mLabelName + "_AfterNullRefCheck");
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if (mExtraStackSpace > 0) {
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new CPUx86.Sub { DestinationReg = CPUx86.Registers.ESP, SourceValue = (uint)mExtraStackSpace };
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}
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new CPUx86.Call { DestinationLabel = mNormalAddress };
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} else {
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset This
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*/
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//Assembler.Add(new CPUx86.Pop("eax"));
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//Assembler.Add(new CPUx86.Pushd("eax"));
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EmitCompareWithNull(Assembler,
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mCurrentMethodInfo,
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delegate(CPUx86.Compare c) {
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c.DestinationReg = CPUx86.Registers.ESP;
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c.DestinationIsIndirect = true;
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c.DestinationDisplacement = mThisOffset;
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},
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mLabelName,
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mLabelName + "_AfterNullRefCheck",
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xEmitCleanup,
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(int)mCurrentILOffset,
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GetService<IMetaDataInfoService>().GetTypeIdLabel(typeof(NullReferenceException)),
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GetService<IMetaDataInfoService>().GetTypeInfo(typeof(NullReferenceException)),
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GetService<IMetaDataInfoService>().GetMethodInfo(typeof(NullReferenceException).GetConstructor(Type.EmptyTypes), false),
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GetServiceProvider());
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new CPU.Label(mLabelName + "_AfterNullRefCheck");
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new CPUx86.Move { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true, SourceDisplacement = mThisOffset };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true };
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new CPUx86.Push { DestinationRef = ElementReference.New(mMethodIdentifier), DestinationIsIndirect = true };
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var xGetMethodAddrInfo =
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GetService<IMetaDataInfoService>().GetMethodInfo(VTablesImplRefs.GetMethodAddressForTypeRef, false);
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new CPUx86.Call { DestinationLabel = xGetMethodAddrInfo.LabelName};
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset This
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*
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* EAX contains the method to call
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*/
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Call.EmitExceptionLogic(Assembler,
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mCurrentILOffset,
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mCurrentMethodInfo,
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mLabelName + "_AfterAddressCheck",
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true,
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xEmitCleanup);
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new CPU.Label(mLabelName + "_AfterAddressCheck");
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if (mTargetMethodInfo.Arguments[0].ArgumentType == typeof(object)) {
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/*
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* On the stack now:
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* $esp method to call
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* $esp + 4 Params
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* $esp + mThisOffset + 4 This
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*/
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new CPUx86.Move { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true, SourceDisplacement = mThisOffset + 4 };
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new CPUx86.Compare { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true, DestinationDisplacement = 4, SourceValue = ((uint)InstanceTypeEnum.BoxedValueType), Size = 32 };
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset This
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*
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* EAX contains the method to call
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*/
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new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.NotEqual, DestinationLabel = mLabelName + "_NOT_BOXED_THIS" };
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.ECX };
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset This
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*
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* ECX contains the method to call
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*/
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new CPUx86.Move { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true, SourceDisplacement = mThisOffset };
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset This
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*
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* ECX contains the method to call
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* EAX contains $This, but boxed
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*/
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new CPUx86.Add { DestinationReg = CPUx86.Registers.EAX, SourceValue = (uint)ObjectImpl.FieldDataOffset };
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new CPUx86.Move { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, DestinationDisplacement = mThisOffset, SourceReg = CPUx86.Registers.EAX };
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/*
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* On the stack now:
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* $esp Params
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* $esp + mThisOffset Pointer to address inside box
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*
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* ECX contains the method to call
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*/
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ECX };
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/*
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* On the stack now:
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* $esp Method to call
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* $esp + 4 Params
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* $esp + mThisOffset + 4 This
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*/
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}
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new CPU.Label(mLabelName + "_NOT_BOXED_THIS");
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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if (mExtraStackSpace > 0) {
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new CPUx86.Sub { DestinationReg = CPUx86.Registers.ESP, SourceValue = (uint)mExtraStackSpace };
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}
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new CPUx86.Call { DestinationReg = CPUx86.Registers.EAX };
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new CPU.Label(mLabelName + "__AFTER_NOT_BOXED_THIS");
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}
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Call.EmitExceptionLogic(Assembler,
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mCurrentILOffset,
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mCurrentMethodInfo,
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mLabelName + "__NO_EXCEPTION_AFTER_CALL",
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true,
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delegate()
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{
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var xResultSize = mTargetMethodInfo.ReturnSize;
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if (xResultSize % 4 != 0)
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{
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xResultSize += 4 - (xResultSize % 4);
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}
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for (int i = 0; i < xResultSize / 4; i++)
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{
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = 4 };
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}
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});
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new CPU.Label(mLabelName + "__NO_EXCEPTION_AFTER_CALL");
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new CPU.Comment("Argument Count = " + mArgumentCount.ToString());
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for (int i = 0; i < mArgumentCount; i++) {
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Assembler.StackContents.Pop();
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}
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if (mReturnSize > 0) {
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Assembler.StackContents.Push(new StackContent((int)mReturnSize));
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}
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}
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}
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}
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