internal Section GetSectionAtVirtualAddress(RVA rva)
{
foreach (Section sect in this.Sections)
{
if (rva >= sect.VirtualAddress &&
rva < sect.VirtualAddress + sect.SizeOfRawData)
{
return(sect);
}
}
return(null);
}
public long ResolveVirtualAddress(RVA rva)
{
foreach (Section sect in this.Sections)
{
if (rva >= sect.VirtualAddress &&
rva < sect.VirtualAddress + sect.SizeOfRawData)
{
return(rva + sect.PointerToRawData - sect.VirtualAddress);
}
}
throw new ArgumentOutOfRangeException("Cannot map the rva to any section");
}
public BinaryReader GetReaderAtVirtualAddress(RVA rva)
{
Section sect = GetSectionAtVirtualAddress(rva);
if (sect == null)
{
return(null);
}
BinaryReader br = new BinaryReader(new MemoryStream(sect.Data));
br.BaseStream.Position = rva - sect.VirtualAddress;
return(br);
}
RVA [] ReadArrayOfRVA(RVA position, uint length)
{
if (position == RVA.Zero)
{
return(new RVA [0]);
}
SetPositionToAddress(position);
RVA [] addresses = new RVA [length];
for (int i = 0; i < length; i++)
{
addresses [i] = m_binaryReader.ReadUInt32();
}
return(addresses);
}
ushort [] ReadArrayOfUInt16(RVA position, uint length)
{
if (position == RVA.Zero)
{
return(new ushort [0]);
}
SetPositionToAddress(position);
ushort [] array = new ushort [length];
for (int i = 0; i < length; i++)
{
array [i] = m_binaryReader.ReadUInt16();
}
return(array);
}
public void Initialize()
{
Image img = m_img;
ResourceWriter resWriter = null;
uint sectAlign = img.PEOptionalHeader.NTSpecificFields.SectionAlignment;
uint fileAlign = img.PEOptionalHeader.NTSpecificFields.FileAlignment;
m_textSect = img.TextSection;
foreach (Section s in img.Sections)
{
if (s.Name == Section.Relocs)
{
m_relocSect = s;
}
else if (s.Name == Section.Resources)
{
m_rsrcSect = s;
m_rsrcWriter = new MemoryBinaryWriter();
resWriter = new ResourceWriter(img, m_rsrcSect, m_rsrcWriter);
resWriter.Write();
}
}
// size computations, fields setting, etc.
uint nbSects = (uint)img.Sections.Count;
img.PEFileHeader.NumberOfSections = (ushort)nbSects;
// build the reloc section data
uint relocSize = 12;
m_relocWriter.Write((uint)0);
m_relocWriter.Write(relocSize);
m_relocWriter.Write((ushort)0);
m_relocWriter.Write((ushort)0);
m_textSect.VirtualSize = (uint)m_textWriter.BaseStream.Length;
m_relocSect.VirtualSize = (uint)m_relocWriter.BaseStream.Length;
if (m_rsrcSect != null)
{
m_rsrcSect.VirtualSize = (uint)m_rsrcWriter.BaseStream.Length;
}
// start counting before sections headers
// section start + section header sixe * number of sections
uint headersEnd = 0x178 + 0x28 * nbSects;
uint fileOffset = headersEnd;
uint sectOffset = sectAlign;
uint imageSize = 0;
foreach (Section sect in img.Sections)
{
fileOffset = GetAligned(fileOffset, fileAlign);
sectOffset = GetAligned(sectOffset, sectAlign);
sect.PointerToRawData = new RVA(fileOffset);
sect.VirtualAddress = new RVA(sectOffset);
sect.SizeOfRawData = GetAligned(sect.VirtualSize, fileAlign);
fileOffset += sect.SizeOfRawData;
sectOffset += sect.SizeOfRawData;
imageSize += GetAligned(sect.SizeOfRawData, sectAlign);
}
if (m_textSect.VirtualAddress.Value != 0x2000)
{
throw new ImageFormatException("Wrong RVA for .text section");
}
if (resWriter != null)
{
resWriter.Patch();
}
img.PEOptionalHeader.StandardFields.CodeSize = GetAligned(
m_textSect.SizeOfRawData, fileAlign);
img.PEOptionalHeader.StandardFields.InitializedDataSize = m_textSect.SizeOfRawData;
if (m_rsrcSect != null)
{
img.PEOptionalHeader.StandardFields.InitializedDataSize += m_rsrcSect.SizeOfRawData;
}
img.PEOptionalHeader.StandardFields.BaseOfCode = m_textSect.VirtualAddress;
img.PEOptionalHeader.StandardFields.BaseOfData = m_relocSect.VirtualAddress;
imageSize += headersEnd;
img.PEOptionalHeader.NTSpecificFields.ImageSize = GetAligned(imageSize, sectAlign);
img.PEOptionalHeader.DataDirectories.BaseRelocationTable = new DataDirectory(
m_relocSect.VirtualAddress, m_relocSect.VirtualSize);
if (m_rsrcSect != null)
{
img.PEOptionalHeader.DataDirectories.ResourceTable = new DataDirectory(
m_rsrcSect.VirtualAddress, (uint)m_rsrcWriter.BaseStream.Length);
}
if (m_kind == AssemblyKind.Dll)
{
img.PEFileHeader.Characteristics = ImageCharacteristics.CILOnlyDll;
img.HintNameTable.RuntimeMain = HintNameTable.RuntimeMainDll;
img.PEOptionalHeader.NTSpecificFields.DLLFlags = 0x400;
}
else
{
img.PEFileHeader.Characteristics = ImageCharacteristics.CILOnlyExe;
img.HintNameTable.RuntimeMain = HintNameTable.RuntimeMainExe;
}
switch (m_kind)
{
case AssemblyKind.Dll:
case AssemblyKind.Console:
img.PEOptionalHeader.NTSpecificFields.SubSystem = SubSystem.WindowsCui;
break;
case AssemblyKind.Windows:
img.PEOptionalHeader.NTSpecificFields.SubSystem = SubSystem.WindowsGui;
break;
}
RVA importTable = new RVA(img.TextSection.VirtualAddress + m_mdWriter.ImportTablePosition);
img.PEOptionalHeader.DataDirectories.ImportTable = new DataDirectory(importTable, 0x57);
img.ImportTable.ImportLookupTable = new RVA((uint)importTable + 0x28);
img.ImportLookupTable.HintNameRVA = img.ImportAddressTable.HintNameTableRVA =
new RVA((uint)img.ImportTable.ImportLookupTable + 0x14);
img.ImportTable.Name = new RVA((uint)img.ImportLookupTable.HintNameRVA + 0xe);
}
void SetPositionToAddress(RVA address)
{
m_binaryReader.BaseStream.Position = m_image.ResolveVirtualAddress(address);
}
