private void AppendSectionHeader(MethodBodySection section, BinaryWriter writer)
{
byte signature = 0x01;
if (section.IsFat)
{
signature |= 0x40;
}
if (section.HasMoreSections)
{
signature |= 0x80;
}
writer.Write(signature);
if (section.IsFat)
{
writer.Write((byte)((section.ExceptionHandlers.Length * 12) + 4));
writer.Write((ushort)0);
}
else
{
writer.Write(BitConverter.GetBytes((section.ExceptionHandlers.Length * 24) + 4), 0, 3);
}
}
internal MethodBodySection ReadSmallSection(byte flag)
{
MethodBodySection section = new MethodBodySection(flag);
int count = peImage.Reader.ReadByte() / 12;
peImage.ReadBytes(2);
for (int i = 0; i < count; i++)
{
ExceptionHandler handler = new ExceptionHandler((ExceptionHandlerType)(BitConverter.ToInt16(peImage.ReadBytes(2), 0) & 7),
BitConverter.ToInt16(peImage.ReadBytes(2), 0),
peImage.Reader.ReadByte(),
BitConverter.ToInt16(peImage.ReadBytes(2), 0),
peImage.Reader.ReadByte());
if (handler.Type == ExceptionHandlerType.Catch)
{
handler.CatchType = (TypeReference)methodbody.Method._netheader.TokenResolver.ResolveMember(BitConverter.ToUInt32(peImage.ReadBytes(4), 0));
}
else if (handler.Type == ExceptionHandlerType.Filter)
{
handler.FilterStart = BitConverter.ToInt32(peImage.ReadBytes(4), 0);
}
else
{
peImage.ReadBytes(4);
}
section._handlers.Add(handler);
}
return(section);
}
private void AppendSection(MethodBodySection section, BinaryWriter writer)
{
AppendSectionHeader(section, writer);
foreach (ExceptionHandler handler in section.ExceptionHandlers)
{
AppendExceptionHandler(handler, writer, section.IsFat);
}
}
internal void ReadSections()
{
peImage.SetOffset(rawoffset + methodbody.HeaderSize + methodbody.CodeSize);
List <MethodBodySection> sections = new List <MethodBodySection>();
MethodBodySection section = ReadSection();
sections.Add(section);
while (section.HasMoreSections)
{
section = ReadSection();
sections.Add(section);
}
this.sections = sections.ToArray();
}
internal MethodBodySection ReadFatSection(byte flag)
{
MethodBodySection section = new MethodBodySection(flag);
peImage.SetOffset(peImage.Stream.Position - 1);
int count = (BitConverter.ToInt32(peImage.ReadBytes(4), 0) >> 8) / 0x18;
for (int i = 0; i < count; i++)
{
ExceptionHandler handler = new ExceptionHandler((ExceptionHandlerType)(BitConverter.ToInt32(peImage.ReadBytes(4), 0) & 7),
BitConverter.ToInt32(peImage.ReadBytes(4), 0),
BitConverter.ToInt32(peImage.ReadBytes(4), 0),
BitConverter.ToInt32(peImage.ReadBytes(4), 0),
BitConverter.ToInt32(peImage.ReadBytes(4), 0));
if (handler.Type == ExceptionHandlerType.Catch)
{
try
{
handler.CatchType = (TypeReference)methodbody.Method._netheader.TokenResolver.ResolveMember(BitConverter.ToUInt32(peImage.ReadBytes(4), 0));
}
catch { handler.CatchType = methodbody.Method._netheader.TypeSystem.Object; }
}
else if (handler.Type == ExceptionHandlerType.Filter)
{
handler.FilterStart = BitConverter.ToInt32(peImage.ReadBytes(4), 0);
}
else
{
peImage.ReadBytes(4);
}
section._handlers.Add(handler);
}
return(section);
}
