internal CorHeader(ref PEBinaryReader reader)
{
// byte count
reader.ReadInt32();
MajorRuntimeVersion = reader.ReadUInt16();
MinorRuntimeVersion = reader.ReadUInt16();
MetadataDirectory = new DirectoryEntry(ref reader);
Flags = (CorFlags)reader.ReadUInt32();
EntryPointTokenOrRelativeVirtualAddress = reader.ReadInt32();
ResourcesDirectory = new DirectoryEntry(ref reader);
StrongNameSignatureDirectory = new DirectoryEntry(ref reader);
CodeManagerTableDirectory = new DirectoryEntry(ref reader);
VtableFixupsDirectory = new DirectoryEntry(ref reader);
ExportAddressTableJumpsDirectory = new DirectoryEntry(ref reader);
ManagedNativeHeaderDirectory = new DirectoryEntry(ref reader);
}
private BlobBuilder SerializeTextSection(SectionLocation location)
{
var sectionBuilder = new BlobBuilder();
var metadataBuilder = new BlobBuilder();
var metadataSizes = _metadataRootBuilder.Sizes;
var textSection = new ManagedTextSection(
imageCharacteristics: Header.ImageCharacteristics,
machine: Header.Machine,
ilStreamSize: _ilStream.Count,
metadataSize: metadataSizes.MetadataSize,
resourceDataSize: _managedResourcesOpt?.Count ?? 0,
strongNameSignatureSize: _strongNameSignatureSize,
debugDataSize: _debugDirectoryBuilderOpt?.Size ?? 0,
mappedFieldDataSize: _mappedFieldDataOpt?.Count ?? 0);
int methodBodyStreamRva = location.RelativeVirtualAddress + textSection.OffsetToILStream;
int mappedFieldDataStreamRva = location.RelativeVirtualAddress + textSection.CalculateOffsetToMappedFieldDataStream();
_metadataRootBuilder.Serialize(metadataBuilder, methodBodyStreamRva, mappedFieldDataStreamRva);
DirectoryEntry debugDirectoryEntry;
BlobBuilder debugTableBuilderOpt;
if (_debugDirectoryBuilderOpt != null)
{
int debugDirectoryOffset = textSection.ComputeOffsetToDebugDirectory();
debugTableBuilderOpt = new BlobBuilder(_debugDirectoryBuilderOpt.TableSize);
_debugDirectoryBuilderOpt.Serialize(debugTableBuilderOpt, location, debugDirectoryOffset);
// Only the size of the fixed part of the debug table goes here.
debugDirectoryEntry = new DirectoryEntry(
location.RelativeVirtualAddress + debugDirectoryOffset,
_debugDirectoryBuilderOpt.TableSize);
}
else
{
debugTableBuilderOpt = null;
debugDirectoryEntry = default(DirectoryEntry);
}
_lazyEntryPointAddress = textSection.GetEntryPointAddress(location.RelativeVirtualAddress);
textSection.Serialize(
sectionBuilder,
location.RelativeVirtualAddress,
_entryPointOpt.IsNil ? 0 : MetadataTokens.GetToken(_entryPointOpt),
_corFlags,
Header.ImageBase,
metadataBuilder,
_ilStream,
_mappedFieldDataOpt,
_managedResourcesOpt,
debugTableBuilderOpt,
out _lazyStrongNameSignature);
_peDirectoriesBuilder.AddressOfEntryPoint = _lazyEntryPointAddress;
_peDirectoriesBuilder.DebugTable = debugDirectoryEntry;
_peDirectoriesBuilder.ImportAddressTable = textSection.GetImportAddressTableDirectoryEntry(location.RelativeVirtualAddress);
_peDirectoriesBuilder.ImportTable = textSection.GetImportTableDirectoryEntry(location.RelativeVirtualAddress);
_peDirectoriesBuilder.CorHeaderTable = textSection.GetCorHeaderDirectoryEntry(location.RelativeVirtualAddress);
return sectionBuilder;
}
internal bool TryGetDirectoryOffset(DirectoryEntry directory, out int offset, bool canCrossSectionBoundary)
{
int sectionIndex = GetContainingSectionIndex(directory.RelativeVirtualAddress);
if (sectionIndex < 0)
{
offset = -1;
return false;
}
int relativeOffset = directory.RelativeVirtualAddress - _sectionHeaders[sectionIndex].VirtualAddress;
if (!canCrossSectionBoundary && directory.Size > _sectionHeaders[sectionIndex].VirtualSize - relativeOffset)
{
throw new BadImageFormatException(SR.SectionTooSmall);
}
offset = _sectionHeaders[sectionIndex].PointerToRawData + relativeOffset;
return true;
}
/// <summary>
/// Gets the offset (in bytes) from the start of the image to the given directory data.
/// </summary>
/// <param name="directory">PE directory entry</param>
/// <param name="offset">Offset from the start of the image to the given directory data</param>
/// <returns>True if the directory data is found, false otherwise.</returns>
public bool TryGetDirectoryOffset(DirectoryEntry directory, out int offset)
{
return TryGetDirectoryOffset(directory, out offset, canCrossSectionBoundary: true);
}
internal PEHeader(ref PEBinaryReader reader)
{
PEMagic magic = (PEMagic)reader.ReadUInt16();
if (magic != PEMagic.PE32 && magic != PEMagic.PE32Plus)
{
throw new BadImageFormatException(SR.UnknownPEMagicValue);
}
Magic = magic;
MajorLinkerVersion = reader.ReadByte();
MinorLinkerVersion = reader.ReadByte();
SizeOfCode = reader.ReadInt32();
SizeOfInitializedData = reader.ReadInt32();
SizeOfUninitializedData = reader.ReadInt32();
AddressOfEntryPoint = reader.ReadInt32();
BaseOfCode = reader.ReadInt32();
if (magic == PEMagic.PE32Plus)
{
BaseOfData = 0; // not present
}
else
{
Debug.Assert(magic == PEMagic.PE32);
BaseOfData = reader.ReadInt32();
}
if (magic == PEMagic.PE32Plus)
{
ImageBase = reader.ReadUInt64();
}
else
{
ImageBase = reader.ReadUInt32();
}
// NT additional fields:
SectionAlignment = reader.ReadInt32();
FileAlignment = reader.ReadInt32();
MajorOperatingSystemVersion = reader.ReadUInt16();
MinorOperatingSystemVersion = reader.ReadUInt16();
MajorImageVersion = reader.ReadUInt16();
MinorImageVersion = reader.ReadUInt16();
MajorSubsystemVersion = reader.ReadUInt16();
MinorSubsystemVersion = reader.ReadUInt16();
// Win32VersionValue (reserved, should be 0)
reader.ReadUInt32();
SizeOfImage = reader.ReadInt32();
SizeOfHeaders = reader.ReadInt32();
CheckSum = reader.ReadUInt32();
Subsystem = (Subsystem)reader.ReadUInt16();
DllCharacteristics = (DllCharacteristics)reader.ReadUInt16();
if (magic == PEMagic.PE32Plus)
{
SizeOfStackReserve = reader.ReadUInt64();
SizeOfStackCommit = reader.ReadUInt64();
SizeOfHeapReserve = reader.ReadUInt64();
SizeOfHeapCommit = reader.ReadUInt64();
}
else
{
SizeOfStackReserve = reader.ReadUInt32();
SizeOfStackCommit = reader.ReadUInt32();
SizeOfHeapReserve = reader.ReadUInt32();
SizeOfHeapCommit = reader.ReadUInt32();
}
// loader flags
reader.ReadUInt32();
NumberOfRvaAndSizes = reader.ReadInt32();
// directory entries:
ExportTableDirectory = new DirectoryEntry(ref reader);
ImportTableDirectory = new DirectoryEntry(ref reader);
ResourceTableDirectory = new DirectoryEntry(ref reader);
ExceptionTableDirectory = new DirectoryEntry(ref reader);
CertificateTableDirectory = new DirectoryEntry(ref reader);
BaseRelocationTableDirectory = new DirectoryEntry(ref reader);
DebugTableDirectory = new DirectoryEntry(ref reader);
CopyrightTableDirectory = new DirectoryEntry(ref reader);
GlobalPointerTableDirectory = new DirectoryEntry(ref reader);
ThreadLocalStorageTableDirectory = new DirectoryEntry(ref reader);
LoadConfigTableDirectory = new DirectoryEntry(ref reader);
BoundImportTableDirectory = new DirectoryEntry(ref reader);
ImportAddressTableDirectory = new DirectoryEntry(ref reader);
DelayImportTableDirectory = new DirectoryEntry(ref reader);
CorHeaderTableDirectory = new DirectoryEntry(ref reader);
// ReservedDirectory (should be 0, 0)
new DirectoryEntry(ref reader);
}
/// <summary>
/// Gets the offset (in bytes) from the start of the image to the given directory entry.
/// </summary>
/// <param name="directory"></param>
/// <param name="offset"></param>
/// <returns>The section containing the directory could not be found.</returns>
/// <exception cref="BadImageFormatException">The section containing the</exception>
public bool TryGetDirectoryOffset(DirectoryEntry directory, out int offset)
{
int sectionIndex = GetContainingSectionIndex(directory.RelativeVirtualAddress);
if (sectionIndex < 0)
{
offset = -1;
return false;
}
int relativeOffset = directory.RelativeVirtualAddress - _sectionHeaders[sectionIndex].VirtualAddress;
if (directory.Size > _sectionHeaders[sectionIndex].VirtualSize - relativeOffset)
{
throw new BadImageFormatException(MetadataResources.SectionTooSmall);
}
offset = _sectionHeaders[sectionIndex].PointerToRawData + relativeOffset;
return true;
}
/// <summary>
/// Gets the offset (in bytes) from the start of the image to the given directory data.
/// </summary>
/// <param name="directory">PE directory entry</param>
/// <param name="offset">Offset from the start of the image to the given directory data</param>
/// <returns>True if the directory data is found, false otherwise.</returns>
public bool TryGetDirectoryOffset(DirectoryEntry directory, out int offset)
{
return(TryGetDirectoryOffset(directory, out offset, canCrossSectionBoundary: true));
}
private BlobBuilder SerializeTextSection(SectionLocation location)
{
var sectionBuilder = new BlobBuilder();
var metadataBuilder = new BlobBuilder();
var metadataSizes = _metadataRootBuilder.Sizes;
var textSection = new ManagedTextSection(
imageCharacteristics: Header.ImageCharacteristics,
machine: Header.Machine,
ilStreamSize: _ilStream.Count,
metadataSize: metadataSizes.MetadataSize,
resourceDataSize: _managedResourcesOpt?.Count ?? 0,
strongNameSignatureSize: _strongNameSignatureSize,
debugDataSize: _debugDirectoryBuilderOpt?.Size ?? 0,
mappedFieldDataSize: _mappedFieldDataOpt?.Count ?? 0);
int methodBodyStreamRva = location.RelativeVirtualAddress + textSection.OffsetToILStream;
int mappedFieldDataStreamRva = location.RelativeVirtualAddress + textSection.CalculateOffsetToMappedFieldDataStream();
_metadataRootBuilder.Serialize(metadataBuilder, methodBodyStreamRva, mappedFieldDataStreamRva);
DirectoryEntry debugDirectoryEntry;
BlobBuilder debugTableBuilderOpt;
if (_debugDirectoryBuilderOpt != null)
{
int debugDirectoryOffset = textSection.ComputeOffsetToDebugDirectory();
debugTableBuilderOpt = new BlobBuilder(_debugDirectoryBuilderOpt.TableSize);
_debugDirectoryBuilderOpt.Serialize(debugTableBuilderOpt, location, debugDirectoryOffset);
// Only the size of the fixed part of the debug table goes here.
debugDirectoryEntry = new DirectoryEntry(
location.RelativeVirtualAddress + debugDirectoryOffset,
_debugDirectoryBuilderOpt.TableSize);
}
else
{
debugTableBuilderOpt = null;
debugDirectoryEntry = default(DirectoryEntry);
}
_lazyEntryPointAddress = textSection.GetEntryPointAddress(location.RelativeVirtualAddress);
textSection.Serialize(
sectionBuilder,
location.RelativeVirtualAddress,
_entryPointOpt.IsNil ? 0 : MetadataTokens.GetToken(_entryPointOpt),
_corFlags,
Header.ImageBase,
metadataBuilder,
_ilStream,
_mappedFieldDataOpt,
_managedResourcesOpt,
debugTableBuilderOpt,
out _lazyStrongNameSignature);
_peDirectoriesBuilder.AddressOfEntryPoint = _lazyEntryPointAddress;
_peDirectoriesBuilder.DebugTable = debugDirectoryEntry;
_peDirectoriesBuilder.ImportAddressTable = textSection.GetImportAddressTableDirectoryEntry(location.RelativeVirtualAddress);
_peDirectoriesBuilder.ImportTable = textSection.GetImportTableDirectoryEntry(location.RelativeVirtualAddress);
_peDirectoriesBuilder.CorHeaderTable = textSection.GetCorHeaderDirectoryEntry(location.RelativeVirtualAddress);
return(sectionBuilder);
}
