/// <summary>
/// Reads a single exception handler from the given input stream.
/// </summary>
/// <param name="cilMethodBody">The method body that contains the exception handler.</param>
/// <param name="reader">The input stream to read from.</param>
/// <param name="fatFormat">A value indicating whether the fat format or the small format should be used.</param>
/// <returns>The exception handler.</returns>
public static ExceptionHandler FromReader(CilMethodBody cilMethodBody, IBinaryStreamReader reader, bool fatFormat)
{
var handlerType = (ExceptionHandlerType)(fatFormat ? reader.ReadUInt32() : reader.ReadUInt16());
int tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
int tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
int handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
int handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
uint classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler(handlerType)
{
IsFat = fatFormat,
TryStart = cilMethodBody.Instructions.GetByOffset(tryOffset),
TryEnd = cilMethodBody.Instructions.GetByOffset(tryOffset + tryLength),
HandlerStart = cilMethodBody.Instructions.GetByOffset(handlerOffset),
HandlerEnd = cilMethodBody.Instructions.GetByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)cilMethodBody).ResolveMember(
new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = cilMethodBody.Instructions.GetByOffset((int)classTokenOrFilterOffset);
break;
}
return(handler);
}
public static CustomAttributeSignature FromReader(CustomAttribute parent, IBinaryStreamReader reader)
{
long position = reader.Position;
if (!reader.CanRead(sizeof (ushort)) || reader.ReadUInt16() != 0x0001)
throw new ArgumentException("Signature doesn't refer to a valid custom attribute signature.");
var signature = new CustomAttributeSignature()
{
StartOffset = position,
};
if (parent.Constructor != null)
{
var methodSignature = parent.Constructor.Signature as MethodSignature;
if (methodSignature != null)
{
foreach (var parameter in methodSignature.Parameters)
{
signature.FixedArguments.Add(CustomAttributeArgument.FromReader(parent.Header,
parameter.ParameterType, reader));
}
}
}
var namedElementCount = reader.CanRead(sizeof (ushort)) ? reader.ReadUInt16() : 0;
for (uint i = 0; i < namedElementCount; i++)
{
signature.NamedArguments.Add(CustomAttributeNamedArgument.FromReader(parent.Header, reader));
}
return signature;
}
/// <summary>
/// Reads a single parameter definition row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the parameter definition table.</param>
/// <returns>The row.</returns>
public static ParameterDefinitionRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new ParameterDefinitionRow(
(ParameterAttributes)reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[2].Size)));
}
/// <summary>
/// Reads a single custom attribute signature from the input stream.
/// </summary>
/// <param name="parentModule">The module that contains the attribute signature.</param>
/// <param name="ctor">The constructor that was called.</param>
/// <param name="reader">The input stream.</param>
/// <returns>The signature.</returns>
/// <exception cref="FormatException">Occurs when the input stream does not point to a valid signature.</exception>
public static CustomAttributeSignature FromReader(ModuleDefinition parentModule, ICustomAttributeType ctor, IBinaryStreamReader reader)
{
ushort prologue = reader.ReadUInt16();
if (prologue != CustomAttributeSignaturePrologue)
{
throw new FormatException("Input stream does not point to a valid custom attribute signature.");
}
var result = new CustomAttributeSignature();
// Read fixed arguments.
var parameterTypes = ctor.Signature.ParameterTypes;
for (int i = 0; i < parameterTypes.Count; i++)
{
var argument = CustomAttributeArgument.FromReader(parentModule, parameterTypes[i], reader);
result.FixedArguments.Add(argument);
}
// Read named arguments.
ushort namedArgumentCount = reader.ReadUInt16();
for (int i = 0; i < namedArgumentCount; i++)
{
var argument = CustomAttributeNamedArgument.FromReader(parentModule, reader);
result.NamedArguments.Add(argument);
}
return(result);
}
/// <summary>
/// Reads a single resource directory from an input stream.
/// </summary>
/// <param name="peFile">The PE file containing the resource.</param>
/// <param name="entry">The entry to read. If this value is <c>null</c>, the root directory is assumed.</param>
/// <param name="directoryReader">The input stream.</param>
/// <param name="depth">
/// The current depth of the resource directory tree structure.
/// If this value exceeds <see cref="MaxDepth"/>, this class will not initialize any entries.
/// </param>
public SerializedResourceDirectory(IPEFile peFile, ResourceDirectoryEntry?entry,
IBinaryStreamReader directoryReader, int depth = 0)
{
_peFile = peFile ?? throw new ArgumentNullException(nameof(peFile));
_depth = depth;
if (entry.HasValue)
{
var value = entry.Value;
if (value.IsByName)
{
Name = value.Name;
}
else
{
Id = value.IdOrNameOffset;
}
}
if (directoryReader != null)
{
Characteristics = directoryReader.ReadUInt32();
TimeDateStamp = directoryReader.ReadUInt32();
MajorVersion = directoryReader.ReadUInt16();
MinorVersion = directoryReader.ReadUInt16();
_namedEntries = directoryReader.ReadUInt16();
_idEntries = directoryReader.ReadUInt16();
_entriesRva = directoryReader.Rva;
directoryReader.Offset =
(directoryReader.Offset + (ulong)((_namedEntries + _idEntries) * ResourceDirectoryEntry.EntrySize));
}
}
public new static CilRawFatMethodBody FromReader(IBinaryStreamReader reader)
{
var body = new CilRawFatMethodBody
{
_header = reader.ReadUInt16(),
MaxStack = reader.ReadUInt16()
};
int codeSize = reader.ReadInt32();
body.LocalVarSigToken = reader.ReadUInt32();
body.Code = reader.ReadBytes(codeSize);
if (body.HasSections)
{
reader.Align(4);
CilExtraSection section;
do
{
section = CilExtraSection.FromReader(reader);
body.ExtraSections.Add(section);
} while (section.HasMoreSections);
}
return(body);
}
public static ExceptionHandler FromReader(MethodBody methodBody, IBinaryStreamReader reader, bool fatFormat)
{
var offset = reader.Position;
var handerType = fatFormat ? reader.ReadUInt32() : reader.ReadUInt16();
var tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler((ExceptionHandlerType)handerType)
{
StartOffset = offset,
IsFat = fatFormat,
MethodBody = methodBody,
TryStart = methodBody.GetInstructionByOffset(tryOffset),
TryEnd = methodBody.GetInstructionByOffset(tryOffset + tryLength),
HandlerStart = methodBody.GetInstructionByOffset(handlerOffset),
HandlerEnd = methodBody.GetInstructionByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)methodBody).ResolveMember(new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = methodBody.GetInstructionByOffset((int)classTokenOrFilterOffset);
break;
}
return(handler);
}
/// <summary>
/// Reads a .NET directory from an input stream.
/// </summary>
/// <param name="peFile">The PE file containing the .NET directory.</param>
/// <param name="reader">The input stream.</param>
/// <param name="metadataStreamReader"></param>
/// <exception cref="ArgumentNullException">Occurs when any of the arguments are <c>null</c>.</exception>
public SerializedDotNetDirectory(IPEFile peFile, IBinaryStreamReader reader,
IMetadataStreamReader metadataStreamReader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
_peFile = peFile ?? throw new ArgumentNullException(nameof(peFile));
_metadataStreamReader = metadataStreamReader;
Offset = reader.Offset;
uint cb = reader.ReadUInt32();
MajorRuntimeVersion = reader.ReadUInt16();
MinorRuntimeVersion = reader.ReadUInt16();
_metadataDirectory = DataDirectory.FromReader(reader);
Flags = (DotNetDirectoryFlags)reader.ReadUInt32();
Entrypoint = reader.ReadUInt32();
_resourcesDirectory = DataDirectory.FromReader(reader);
_strongNameDirectory = DataDirectory.FromReader(reader);
_codeManagerDirectory = DataDirectory.FromReader(reader);
_vtableFixupsDirectory = DataDirectory.FromReader(reader);
_exportsDirectory = DataDirectory.FromReader(reader);
_nativeHeaderDirectory = DataDirectory.FromReader(reader);
}
public static CustomAttributeSignature FromReader(CustomAttribute parent, IBinaryStreamReader reader)
{
if (!reader.CanRead(sizeof(ushort)) || reader.ReadUInt16() != 0x0001)
{
throw new ArgumentException("Signature doesn't refer to a valid custom attribute signature.");
}
var signature = new CustomAttributeSignature();
if (parent.Constructor != null)
{
var methodSignature = parent.Constructor.Signature as MethodSignature;
if (methodSignature != null)
{
foreach (var parameter in methodSignature.Parameters)
{
signature.FixedArguments.Add(CustomAttributeArgument.FromReader(parent.Image, parameter.ParameterType, reader));
}
}
}
var namedElementCount = reader.CanRead(sizeof(ushort)) ? reader.ReadUInt16() : 0;
for (uint i = 0; i < namedElementCount; i++)
{
signature.NamedArguments.Add(CustomAttributeNamedArgument.FromReader(parent.Image, reader));
}
return(signature);
}
/// <summary>
/// Reads a single generic parameter row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the generic parameter table.</param>
/// <returns>The row.</returns>
public static GenericParameterRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new GenericParameterRow(
reader.ReadUInt16(),
(GenericParameterAttributes)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[2].Size),
reader.ReadIndex((IndexSize)layout.Columns[3].Size)));
}
/// <summary>
/// Reads a raw method body from the given binary input stream using the fat method body format.
/// </summary>
/// <param name="errorListener">The object responsible for recording parser errors.</param>
/// <param name="reader">The binary input stream to read from.</param>
/// <returns>The raw method body.</returns>
/// <exception cref="FormatException">Occurs when the method header indicates an method body that is not in the
/// fat format.</exception>
public new static CilRawFatMethodBody FromReader(IErrorListener errorListener, IBinaryStreamReader reader)
{
ulong fileOffset = reader.Offset;
uint rva = reader.Rva;
// Read flags.
ushort header = reader.ReadUInt16();
var flags = (CilMethodBodyAttributes)(header & 0xFFF);
int headerSize = (header >> 12) * sizeof(uint);
// Verify this is a fat method body.
if ((flags & CilMethodBodyAttributes.Fat) != CilMethodBodyAttributes.Fat)
{
errorListener.BadImage("Invalid fat CIL method body header.");
return(null);
}
// Read remaining header.
ushort maxStack = reader.ReadUInt16();
uint codeSize = reader.ReadUInt32();
uint localVarSigToken = reader.ReadUInt32();
// Move to code.
reader.Offset = fileOffset + (ulong)headerSize;
// Verify code size.
if (reader.Offset + codeSize > reader.StartOffset + reader.Length)
{
errorListener.BadImage("Invalid fat CIL method body code size.");
return(null);
}
// Read code.
var code = new byte[codeSize];
reader.ReadBytes(code, 0, code.Length);
// Create body.
var body = new CilRawFatMethodBody(flags, maxStack, localVarSigToken, code);
body.UpdateOffsets(fileOffset, rva);
// Read any extra sections.
if (body.HasSections)
{
reader.Align(4);
CilExtraSection section;
do
{
section = CilExtraSection.FromReader(reader);
body.ExtraSections.Add(section);
} while (section.HasMoreSections);
}
return(body);
}
private static System.Version ReadVersion(IBinaryStreamReader reader)
{
ushort minor = reader.ReadUInt16();
ushort major = reader.ReadUInt16();
ushort revision = reader.ReadUInt16();
ushort build = reader.ReadUInt16();
return(new System.Version(major, minor, build, revision));
}
/// <summary>
/// Reads a single exception handler from the provided input stream.
/// </summary>
/// <param name="body">The method body containing the exception handler.</param>
/// <param name="reader">The input stream.</param>
/// <param name="isFat"><c>true</c> if the fat format should be used, <c>false</c> otherwise.</param>
/// <returns>The exception handler.</returns>
public static CilExceptionHandler FromReader(CilMethodBody body, IBinaryStreamReader reader, bool isFat)
{
CilExceptionHandlerType handlerType;
int tryStartOffset;
int tryEndOffset;
int handlerStartOffset;
int handlerEndOffset;
// Read raw structure.
if (isFat)
{
handlerType = (CilExceptionHandlerType)reader.ReadUInt32();
tryStartOffset = reader.ReadInt32();
tryEndOffset = tryStartOffset + reader.ReadInt32();
handlerStartOffset = reader.ReadInt32();
handlerEndOffset = handlerStartOffset + reader.ReadInt32();
}
else
{
handlerType = (CilExceptionHandlerType)reader.ReadUInt16();
tryStartOffset = reader.ReadUInt16();
tryEndOffset = tryStartOffset + reader.ReadByte();
handlerStartOffset = reader.ReadUInt16();
handlerEndOffset = handlerStartOffset + reader.ReadByte();
}
int exceptionTokenOrFilterStart = reader.ReadInt32();
// Create handler.
var handler = new CilExceptionHandler
{
HandlerType = handlerType,
TryStart = body.Instructions.GetByOffset(tryStartOffset)?.CreateLabel() ??
new CilOffsetLabel(tryStartOffset),
TryEnd = body.Instructions.GetByOffset(tryEndOffset)?.CreateLabel() ?? new CilOffsetLabel(tryEndOffset),
HandlerStart = body.Instructions.GetByOffset(handlerStartOffset)?.CreateLabel() ??
new CilOffsetLabel(handlerStartOffset),
HandlerEnd = body.Instructions.GetByOffset(handlerEndOffset)?.CreateLabel() ??
new CilOffsetLabel(handlerEndOffset),
};
// Interpret last field.
switch (handler.HandlerType)
{
case CilExceptionHandlerType.Exception when body.Owner.Module.TryLookupMember(exceptionTokenOrFilterStart, out var member):
handler.ExceptionType = member as ITypeDefOrRef;
break;
case CilExceptionHandlerType.Filter:
handler.FilterStart = body.Instructions.GetByOffset(exceptionTokenOrFilterStart)?.CreateLabel()
?? new CilOffsetLabel(exceptionTokenOrFilterStart);
break;;
}
return(handler);
}
/// <summary>
/// Reads a single resource table header.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns>The table header.</returns>
public static VersionTableEntryHeader FromReader(IBinaryStreamReader reader)
{
return(new VersionTableEntryHeader
{
Length = reader.ReadUInt16(),
ValueLength = reader.ReadUInt16(),
Type = (VersionTableValueType)reader.ReadUInt16(),
Key = reader.ReadUnicodeString(),
});
}
/// <summary>
/// Reads a single method definition row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the method definition table.</param>
/// <param name="referenceResolver">The resolver to use for resolving the virtual address of the method body.</param>
/// <returns>The row.</returns>
public static MethodDefinitionRow FromReader(IBinaryStreamReader reader, TableLayout layout, ISegmentReferenceResolver referenceResolver)
{
return(new MethodDefinitionRow(
referenceResolver.GetReferenceToRva(reader.ReadUInt32()),
(MethodImplAttributes)reader.ReadUInt16(),
(MethodAttributes)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[3].Size),
reader.ReadIndex((IndexSize)layout.Columns[4].Size),
reader.ReadIndex((IndexSize)layout.Columns[5].Size)));
}
/// <summary>
/// Reads a single method definition row from an input stream.
/// </summary>
/// <param name="context">The reader context.</param>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the method definition table.</param>
/// <returns>The row.</returns>
public static MethodDefinitionRow FromReader(PEReaderContext context, IBinaryStreamReader reader, TableLayout layout)
{
return(new MethodDefinitionRow(
context.File.GetReferenceToRva(reader.ReadUInt32()),
(MethodImplAttributes)reader.ReadUInt16(),
(MethodAttributes)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[3].Size),
reader.ReadIndex((IndexSize)layout.Columns[4].Size),
reader.ReadIndex((IndexSize)layout.Columns[5].Size)));
}
/// <summary>
/// Reads a single assembly definition row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the assembly definition table.</param>
/// <returns>The row.</returns>
public static AssemblyReferenceRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new AssemblyReferenceRow(
reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16(),
(AssemblyAttributes)reader.ReadUInt32(),
reader.ReadIndex((IndexSize)layout.Columns[5].Size),
reader.ReadIndex((IndexSize)layout.Columns[6].Size),
reader.ReadIndex((IndexSize)layout.Columns[7].Size),
reader.ReadIndex((IndexSize)layout.Columns[8].Size)));
}
/// <summary>
/// Reads a single assembly definition row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the assembly definition table.</param>
/// <returns>The row.</returns>
public static AssemblyDefinitionRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new AssemblyDefinitionRow(
(AssemblyHashAlgorithm)reader.ReadUInt32(),
reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16(),
(AssemblyAttributes)reader.ReadUInt32(),
reader.ReadIndex((IndexSize)layout.Columns[6].Size),
reader.ReadIndex((IndexSize)layout.Columns[7].Size),
reader.ReadIndex((IndexSize)layout.Columns[8].Size)));
}
public static FileHeader FromReader(IBinaryStreamReader reader)
{
return(new FileHeader
{
FileOffset = reader.FileOffset,
Machine = (MachineType)reader.ReadUInt16(),
NumberOfSections = reader.ReadUInt16(),
TimeDateStamp = reader.ReadUInt32(),
PointerToSymbolTable = reader.ReadUInt32(),
NumberOfSymbols = reader.ReadUInt32(),
SizeOfOptionalHeader = reader.ReadUInt16(),
Characteristics = (Characteristics)reader.ReadUInt16()
});
}
/// <summary>
/// Reads a metadata directory from an input stream.
/// </summary>
/// <param name="context">The reader context.</param>
/// <param name="directoryReader">The input stream containing the metadata directory.</param>
/// <exception cref="ArgumentNullException">Occurs when any of the arguments are <c>null</c>.</exception>
/// <exception cref="NotSupportedException">Occurs when an unsupported metadata directory format was encountered.</exception>
/// <exception cref="BadImageFormatException">Occurs when the metadata directory header is invalid.</exception>
public SerializedMetadata(PEReaderContext context, IBinaryStreamReader directoryReader)
{
if (directoryReader == null)
{
throw new ArgumentNullException(nameof(directoryReader));
}
_context = context ?? throw new ArgumentNullException(nameof(context));
_streamContentsReader = directoryReader.Fork();
var signature = (MetadataSignature)directoryReader.ReadUInt32();
switch (signature)
{
case MetadataSignature.Bsjb:
// BSJB header is the default header.
break;
case MetadataSignature.Moc:
_context.NotSupported("Old +MOC metadata header format is not supported.");
return;
default:
_context.BadImage($"Invalid metadata header ({(uint) signature:X8}).");
return;
}
MajorVersion = directoryReader.ReadUInt16();
MinorVersion = directoryReader.ReadUInt16();
Reserved = directoryReader.ReadUInt32();
int versionLength = directoryReader.ReadInt32();
if (!directoryReader.CanRead(versionLength))
{
_context.BadImage($"Invalid version length in metadata header ({versionLength.ToString()} characters).");
return;
}
var versionBytes = new byte[versionLength];
directoryReader.ReadBytes(versionBytes, 0, versionBytes.Length);
VersionString = Encoding.ASCII.GetString(versionBytes);
Flags = directoryReader.ReadUInt16();
_numberOfStreams = directoryReader.ReadInt16();
_streamEntriesReader = directoryReader.Fork();
}
/// <summary>
/// Reads a single extra section from the provided input stream.
/// </summary>
/// <param name="reader">The input stream to read from.</param>
/// <returns>The extra section that was read.</returns>
public static CilExtraSection FromReader(IBinaryStreamReader reader)
{
var section = new CilExtraSection
{
Attributes = (CilExtraSectionAttributes)reader.ReadByte()
};
int dataSize;
if (section.IsFat)
{
dataSize = reader.ReadByte() |
(reader.ReadByte() << 0x08) |
(reader.ReadByte() << 0x10);
}
else
{
dataSize = reader.ReadByte();
reader.ReadUInt16();
}
section.Data = new byte[dataSize];
reader.ReadBytes(section.Data, 0, dataSize);
return(section);
}
/// <summary>
/// Reads a single class layout row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the class layout table.</param>
/// <returns>The row.</returns>
public static ClassLayoutRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new ClassLayoutRow(
reader.ReadUInt16(),
reader.ReadUInt32(),
reader.ReadIndex((IndexSize)layout.Columns[2].Size)));
}
/// <summary>
/// Reads a DOS header structure at the current position of the provided input stream.
/// </summary>
/// <param name="reader">The input stream to read from.</param>
/// <returns>The read DOS header.</returns>
/// <exception cref="BadImageFormatException">Occurs when the input stream does not point to a valid DOS header.</exception>
public static DosHeader FromReader(IBinaryStreamReader reader)
{
ulong offset = reader.Offset;
uint rva = reader.Rva;
var stub = new byte[DefaultNewHeaderOffset];
ushort magic = reader.ReadUInt16();
if (magic != ValidPEMagic)
{
throw new BadImageFormatException();
}
reader.Offset += NextHeaderFieldOffset - 2;
uint nextHeaderOffset = reader.ReadUInt32();
if (nextHeaderOffset != DefaultNewHeaderOffset)
{
Array.Resize(ref stub, (int)nextHeaderOffset);
}
reader.Offset -= NextHeaderFieldOffset + 4;
reader.ReadBytes(stub, 0, stub.Length);
return(new DosHeader(stub)
{
Offset = offset,
Rva = rva,
NextHeaderOffset = nextHeaderOffset
});
}
/// <summary>
/// Reads a single security declaration row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the security declaration table.</param>
/// <returns>The row.</returns>
public static SecurityDeclarationRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new SecurityDeclarationRow(
(SecurityAction)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[1].Size),
reader.ReadIndex((IndexSize)layout.Columns[2].Size)));
}
/// <summary>
/// Reads a single method semantics row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the method semantics table.</param>
/// <returns>The row.</returns>
public static MethodSemanticsRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new MethodSemanticsRow(
(MethodSemanticsAttributes)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[1].Size),
reader.ReadIndex((IndexSize)layout.Columns[2].Size)));
}
public static CilExtraSection FromReader(IBinaryStreamReader reader)
{
var section = new CilExtraSection
{
Attributes = (CilExtraSectionAttributes)reader.ReadByte()
};
if (!section.IsExceptionHandler)
{
throw new NotSupportedException("Invalid or unsupported extra section.");
}
int dataSize;
if (section.IsFat)
{
dataSize = reader.ReadByte() |
(reader.ReadByte() << 0x08) |
(reader.ReadByte() << 0x10);
}
else
{
dataSize = reader.ReadByte();
reader.ReadUInt16();
}
section.Data = reader.ReadBytes(dataSize);
return(section);
}
private void ReadRelocationEntry(IBinaryStreamReader reader, uint pageRva)
{
ushort rawValue = reader.ReadUInt16();
var type = (RelocationType)(rawValue >> 12);
int offset = rawValue & 0xFFF;
Items.Add(new BaseRelocation(type, _peFile.GetReferenceToRva((uint)(pageRva + offset))));
}
/// <summary>
/// Reads a single implementation map row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the implementation map table.</param>
/// <returns>The row.</returns>
public static ImplementationMapRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new ImplementationMapRow(
(ImplementationMapAttributes)reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[1].Size),
reader.ReadIndex((IndexSize)layout.Columns[2].Size),
reader.ReadIndex((IndexSize)layout.Columns[3].Size)));
}
/// <summary>
/// Reads a metadata directory from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="metadataStreamReader"></param>
/// <exception cref="ArgumentNullException">Occurs when any of the arguments are <c>null</c>.</exception>
/// <exception cref="NotSupportedException">Occurs when an unsupported metadata directory format was encountered.</exception>
/// <exception cref="BadImageFormatException">Occurs when the metadata directory header is invalid.</exception>
public SerializedMetadata(IBinaryStreamReader reader, IMetadataStreamReader metadataStreamReader)
{
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
_metadataStreamReader = metadataStreamReader;
_streamContentsReader = reader.Fork();
var signature = (MetadataSignature)reader.ReadUInt32();
switch (signature)
{
case MetadataSignature.Bsjb:
// BSJB header is the default header.
break;
case MetadataSignature.Moc:
throw new NotSupportedException("Old +MOC metadata header format is not supported.");
default:
throw new BadImageFormatException($"Invalid metadata header ({(uint) signature:X8}).");
}
MajorVersion = reader.ReadUInt16();
MinorVersion = reader.ReadUInt16();
Reserved = reader.ReadUInt32();
int versionLength = reader.ReadInt32();
if (!reader.CanRead(versionLength))
{
throw new BadImageFormatException($"Invalid version length in metadata header ({versionLength} characters).");
}
var versionBytes = new byte[versionLength];
reader.ReadBytes(versionBytes, 0, versionBytes.Length);
VersionString = Encoding.ASCII.GetString(versionBytes);
Flags = reader.ReadUInt16();
_numberOfStreams = reader.ReadInt16();
_streamEntriesReader = reader.Fork();
}
/// <summary>
/// Reads an icon group resource entry from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <returns>The parsed group icon resource entry.</returns>
public static IconGroupDirectoryEntry FromReader(IBinaryStreamReader reader)
{
var entry = new IconGroupDirectoryEntry
{
Offset = reader.Offset,
Rva = reader.Rva,
Width = reader.ReadByte(),
Height = reader.ReadByte(),
ColorCount = reader.ReadByte(),
Reserved = reader.ReadByte(),
ColorPlanes = reader.ReadUInt16(),
PixelBitCount = reader.ReadUInt16(),
BytesInRes = reader.ReadUInt32(),
Id = reader.ReadUInt16()
};
return(entry);
}
/// <summary>
/// Reads a single module definition row from an input stream.
/// </summary>
/// <param name="reader">The input stream.</param>
/// <param name="layout">The layout of the module definition table.</param>
/// <returns>The row.</returns>
public static ModuleDefinitionRow FromReader(IBinaryStreamReader reader, TableLayout layout)
{
return(new ModuleDefinitionRow(
reader.ReadUInt16(),
reader.ReadIndex((IndexSize)layout.Columns[1].Size),
reader.ReadIndex((IndexSize)layout.Columns[2].Size),
reader.ReadIndex((IndexSize)layout.Columns[3].Size),
reader.ReadIndex((IndexSize)layout.Columns[4].Size)));
}
private static object ReadRawOperand(IBinaryStreamReader reader, MsilOperandType msilOperandType)
{
switch (msilOperandType)
{
case MsilOperandType.InlineNone:
return null;
case MsilOperandType.InlineArgument:
case MsilOperandType.InlineVar:
return reader.ReadUInt16();
case MsilOperandType.InlineI:
case MsilOperandType.InlineBrTarget:
return reader.ReadInt32();
case MsilOperandType.ShortInlineArgument:
case MsilOperandType.ShortInlineVar:
return reader.ReadByte();
case MsilOperandType.ShortInlineBrTarget:
case MsilOperandType.ShortInlineI:
return reader.ReadSByte();
case MsilOperandType.ShortInlineR:
return reader.ReadSingle();
case MsilOperandType.InlineR:
return reader.ReadDouble();
case MsilOperandType.InlineI8:
return reader.ReadInt64();
case MsilOperandType.InlineField :
case MsilOperandType.InlineMethod :
case MsilOperandType.InlineSig:
case MsilOperandType.InlineTok:
case MsilOperandType.InlineType:
case MsilOperandType.InlineString:
return new MetadataToken(reader.ReadUInt32());
case MsilOperandType.InlineSwitch:
var offsets = new int[reader.ReadUInt32()];
for (int i = 0; i < offsets.Length; i++)
offsets[i] = reader.ReadInt32();
return offsets;
}
throw new NotSupportedException();
}
private static object ReadValue(MetadataHeader header, TypeSignature typeSignature, IBinaryStreamReader reader)
{
switch (typeSignature.ElementType)
{
case ElementType.Boolean:
return reader.ReadByte() == 1;
case ElementType.Char:
return (char)reader.ReadUInt16();
case ElementType.R4:
return reader.ReadSingle();
case ElementType.R8:
return reader.ReadDouble();
case ElementType.I1:
return reader.ReadSByte();
case ElementType.I2:
return reader.ReadInt16();
case ElementType.I4:
return reader.ReadInt32();
case ElementType.I8:
return reader.ReadInt64();
case ElementType.U1:
return reader.ReadByte();
case ElementType.U2:
return reader.ReadUInt16();
case ElementType.U4:
return reader.ReadUInt32();
case ElementType.U8:
return reader.ReadUInt64();
case ElementType.String:
return reader.ReadSerString();
case ElementType.Object:
return ReadValue(header, TypeSignature.ReadFieldOrPropType(header, reader), reader);
case ElementType.Class:
case ElementType.Enum:
case ElementType.ValueType:
var enumTypeDef = header.MetadataResolver.ResolveType(typeSignature);
if (enumTypeDef == null)
throw new MemberResolutionException(typeSignature);
if (enumTypeDef.IsEnum)
return ReadValue(header, enumTypeDef.GetEnumUnderlyingType(), reader);
break;
}
if (typeSignature.IsTypeOf("System", "Type"))
return TypeSignature.FromAssemblyQualifiedName(header, reader.ReadSerString());
throw new NotSupportedException("Unsupported element type " + typeSignature.ElementType);
}
public static ExceptionHandler FromReader(MethodBody methodBody, IBinaryStreamReader reader, bool fatFormat)
{
var offset = reader.Position;
var handerType = fatFormat ? reader.ReadUInt32() : reader.ReadUInt16();
var tryOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var tryLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var handlerOffset = fatFormat ? reader.ReadInt32() : reader.ReadUInt16();
var handlerLength = fatFormat ? reader.ReadInt32() : reader.ReadByte();
var classTokenOrFilterOffset = reader.ReadUInt32();
var handler = new ExceptionHandler((ExceptionHandlerType)handerType)
{
StartOffset = offset,
IsFat = fatFormat,
TryStart = methodBody.GetInstructionByOffset(tryOffset),
TryEnd = methodBody.GetInstructionByOffset(tryOffset + tryLength),
HandlerStart = methodBody.GetInstructionByOffset(handlerOffset),
HandlerEnd = methodBody.GetInstructionByOffset(handlerOffset + handlerLength),
};
switch (handler.HandlerType)
{
case ExceptionHandlerType.Exception:
handler.CatchType = (ITypeDefOrRef)((IOperandResolver)methodBody).ResolveMember(new MetadataToken(classTokenOrFilterOffset));
break;
case ExceptionHandlerType.Filter:
handler.FilterStart = methodBody.GetInstructionByOffset((int)classTokenOrFilterOffset);
break;
}
return handler;
}
