public void Write()
{
var peImage = mdEditor.RealMetadata.PEImage;
bool is32Bit = peImage.ImageNTHeaders.OptionalHeader is ImageOptionalHeader32;
sections.Add(textSection = new PESection(".text", 0x60000020));
StrongNameSignatureSectionData snData = null;
var cor20 = mdEditor.RealMetadata.ImageCor20Header;
if ((cor20.Flags & ComImageFlags.StrongNameSigned) != 0 && cor20.StrongNameSignature.Size != 0 && cor20.StrongNameSignature.VirtualAddress != 0)
{
snData = new StrongNameSignatureSectionData(cor20.StrongNameSignature.Size);
}
if (snData != null)
{
textSection.SectionData.Add(snData);
}
var mdData = new DotNetMetadataSectionData(mdEditor);
textSection.SectionData.Add(new ImageCor20HeaderSectionData(mdData, snData));
textSection.SectionData.Add(mdData);
// DOS MZ header
stream.Write(dosHeader);
// PE\0\0
Debug.Assert(stream.Position == BitConverter.ToUInt32(dosHeader, 0x7C));
stream.Write(0x00004550);
// IMAGE_FILE_HEADER
var ifh = peImage.ImageNTHeaders.FileHeader;
stream.Write((ushort)ifh.Machine);
Debug.Assert(sections.Count <= ushort.MaxValue);
stream.Write((ushort)sections.Count);
stream.Write(ifh.TimeDateStamp);
stream.Position += 8; // PointerToSymbolTable & NumberOfSymbols
stream.Write((ushort)(is32Bit ? 0xE0 : 0xF0));
stream.Write((ushort)ifh.Characteristics);
// IMAGE_OPTIONAL_HEADER
var optHeaderPos = stream.Position;
if (is32Bit)
{
var opt = (ImageOptionalHeader32)peImage.ImageNTHeaders.OptionalHeader;
var start = stream.Position;
stream.Write(opt.Magic);
stream.Write(opt.MajorLinkerVersion);
stream.Write(opt.MinorLinkerVersion);
// SizeOfCode, SizeOfInitializedData, SizeOfUninitializedData
// AddressOfEntryPoint, BaseOfCode, BaseOfData
stream.Position += 6 * 4;
stream.Write((uint)opt.ImageBase);
stream.Write((uint)SectionAlignment);
stream.Write((uint)FileAlignment);
stream.Write(opt.MajorOperatingSystemVersion);
stream.Write(opt.MinorOperatingSystemVersion);
stream.Write(opt.MajorImageVersion);
stream.Write(opt.MinorImageVersion);
stream.Write(opt.MajorSubsystemVersion);
stream.Write(opt.MinorSubsystemVersion);
stream.Write(opt.Win32VersionValue);
// SizeOfImage, SizeOfHeaders, CheckSum
stream.Position += 3 * 4;
stream.Write((ushort)opt.Subsystem);
stream.Write((ushort)opt.DllCharacteristics);
stream.Write((uint)opt.SizeOfStackReserve);
stream.Write((uint)opt.SizeOfStackCommit);
stream.Write((uint)opt.SizeOfHeapReserve);
stream.Write((uint)opt.SizeOfHeapCommit);
stream.Write(opt.LoaderFlags);
stream.Write(0x10); // NumberOfRvaAndSizes
Debug.Assert((stream.Position - start) == 0x60);
}
else
{
var opt = (ImageOptionalHeader64)peImage.ImageNTHeaders.OptionalHeader;
var start = stream.Position;
stream.Write(opt.Magic);
stream.Write(opt.MajorLinkerVersion);
stream.Write(opt.MinorLinkerVersion);
// SizeOfCode, SizeOfInitializedData, SizeOfUninitializedData
// AddressOfEntryPoint, BaseOfCode
stream.Position += 5 * 4;
stream.Write(opt.ImageBase);
stream.Write((uint)SectionAlignment);
stream.Write((uint)FileAlignment);
stream.Write(opt.MajorOperatingSystemVersion);
stream.Write(opt.MinorOperatingSystemVersion);
stream.Write(opt.MajorImageVersion);
stream.Write(opt.MinorImageVersion);
stream.Write(opt.MajorSubsystemVersion);
stream.Write(opt.MinorSubsystemVersion);
stream.Write(opt.Win32VersionValue);
// SizeOfImage, SizeOfHeaders, CheckSum
stream.Position += 3 * 4;
stream.Write((ushort)opt.Subsystem);
stream.Write((ushort)opt.DllCharacteristics);
stream.Write(opt.SizeOfStackReserve);
stream.Write(opt.SizeOfStackCommit);
stream.Write(opt.SizeOfHeapReserve);
stream.Write(opt.SizeOfHeapCommit);
stream.Write(opt.LoaderFlags);
stream.Write(0x10); // NumberOfRvaAndSizes
Debug.Assert((stream.Position - start) == 0x70);
}
// IMAGE_DATA_DIRECTORY
dataDirPosition = stream.Position;
stream.Position += 0x10 * 8;
// IMAGE_SECTION_HEADER
var sectionPos = stream.Position;
foreach (var section in sections)
{
Debug.Assert(section.Name.Length == 8);
stream.Write(section.Name);
// VirtualSize, VirtualAddress, SizeOfRawData, PointerToRawData
// PointerToRelocations, PointerToLinenumbers, NumberOfRelocations, NumberOfLinenumbers
stream.Position += 6 * 4 + 2 * 2;
stream.Write(section.Characteristics);
}
uint headerLength = (uint)stream.Position;
AlignUp(FileAlignment);
// Write all sections
uint rva = SectionAlignment;
foreach (var section in sections)
{
section.VirtualAddress = rva;
section.PointerToRawData = (uint)stream.Position;
foreach (var data in section.SectionData)
{
var pos = stream.Position;
AlignUp(data.Alignment);
rva += (uint)(stream.Position - pos);
pos = stream.Position;
data.Write(this, rva, stream);
rva += (uint)(stream.Position - pos);
}
Debug.Assert(stream.Position != section.PointerToRawData);
if (stream.Position == section.PointerToRawData)
{
stream.Position++;
}
section.VirtualSize = (uint)stream.Position - section.PointerToRawData;
section.SizeOfRawData = ((uint)stream.Position - section.PointerToRawData + FileAlignment - 1) & ~(FileAlignment - 1);
rva = (rva + SectionAlignment - 1) & ~(SectionAlignment - 1);
AlignUp(FileAlignment);
}
stream.Length = stream.Position;
// Update IMAGE_SECTION_HEADER
stream.Position = sectionPos;
foreach (var section in sections)
{
stream.Position += 8;
stream.Write(section.VirtualSize);
stream.Write(section.VirtualAddress);
stream.Write(section.SizeOfRawData);
stream.Write(section.PointerToRawData);
stream.Position += 16;
}
// Update IMAGE_OPTIONAL_HEADER
var sectionSizes = new SectionSizes(FileAlignment, SectionAlignment, headerLength, () => GetSectionSizeInfos());
stream.Position = optHeaderPos;
if (is32Bit)
{
var opt = (ImageOptionalHeader32)peImage.ImageNTHeaders.OptionalHeader;
stream.Position += 4;
stream.Write(sectionSizes.SizeOfCode);
stream.Write(sectionSizes.SizeOfInitdData);
stream.Write(sectionSizes.SizeOfUninitdData);
stream.Position += 4;
stream.Write(sectionSizes.BaseOfCode);
stream.Write(sectionSizes.BaseOfData);
stream.Position += 0x1C;
stream.Write(sectionSizes.SizeOfImage);
stream.Write(sectionSizes.SizeOfHeaders);
}
else
{
var opt = (ImageOptionalHeader64)peImage.ImageNTHeaders.OptionalHeader;
stream.Position += 4;
stream.Write(sectionSizes.SizeOfCode);
stream.Write(sectionSizes.SizeOfInitdData);
stream.Write(sectionSizes.SizeOfUninitdData);
stream.Position += 4;
stream.Write(sectionSizes.BaseOfCode);
stream.Position += 0x20;
stream.Write(sectionSizes.SizeOfImage);
stream.Write(sectionSizes.SizeOfHeaders);
}
foreach (var section in sections)
{
foreach (var data in section.SectionData)
{
data.Finish(this, stream);
}
}
}
public ImageCor20HeaderSectionData(DotNetMetadataSectionData mdData, StrongNameSignatureSectionData?snData)
{
this.mdData = mdData;
this.snData = snData;
}