private bool ReadEntryHeader(BinaryReader Reader, out ImageHeader Header)
{
Header = new ImageHeader();
if (Reader == null)
{
return(false);
}
try
{
Header.ImageID = Reader.ReadUInt16();
Header.ImageType = (ImageType)Reader.ReadUInt16();
Header.StartBlock = Reader.ReadUInt16();
Header.EndBlock = Reader.ReadUInt16();
Header.ExecuteAddress = Reader.ReadUInt32();
Header.FileSize = Reader.ReadUInt32();
Header.ImageName = Utils.ReadNCString(Reader, 0x20);
return(CheckEntryHeader(Header));
}
catch (Exception)
{
return(false);
}
}
private bool ReadBootHeader(BinaryReader Reader, out BootHeader Header)
{
Header = new BootHeader();
if (Reader == null)
{
return(false);
}
try
{
Header.BootCodeMarker = Reader.ReadUInt32();
Header.ExecuteAddress = Reader.ReadUInt32();
Header.ImageSize = Reader.ReadUInt32();
Header.SkewMarker = Reader.ReadUInt32();
Header.DQSODS = Reader.ReadUInt32();
Header.CLKQSDS = Reader.ReadUInt32();
Header.DramMarker = Reader.ReadUInt32();
Header.DramSize = Reader.ReadUInt32();
}
catch (Exception)
{
return(false);
}
// Magic check
if (Header.BootCodeMarker != 0x57425AA5)
{
return(false);
}
return(true);
}
private bool WriteBootHeader(BinaryWriter Writer, BootHeader Header)
{
if (Writer == null)
{
return(false);
}
try
{
Writer.Write(Header.BootCodeMarker);
Writer.Write(Header.ExecuteAddress);
Writer.Write(Header.ImageSize);
Writer.Write(Header.SkewMarker);
Writer.Write(Header.DQSODS);
Writer.Write(Header.CLKQSDS);
Writer.Write(Header.DramMarker);
Writer.Write(Header.DramSize);
}
catch (Exception)
{
return(false);
}
return(true);
}
public bool ReadImage(Stream ImageStream)
{
if (ImageStream == null)
{
return(false);
}
BinaryReader reader = new BinaryReader(ImageStream);
uint numImages = 0;
// Prepare everything
Header = new BootHeader();
if (Images != null)
{
Images.Clear();
}
Images = new List <ImageEntry>();
// Our blocksize is 0x20000 bytes / block
// Seek to the beginning of the file / memorystream for our header block
// When writing, there is a copy of the entire NandLoader at 0x20000, 0x40000 and 0x60000
reader.BaseStream.Seek(0x00000, SeekOrigin.Begin);
if (!ReadBootHeader(reader, out Header))
{
return(false);
}
// Now seek to block 0 of the last nand page - 1
// When writing, there is a copy at 0x3f000, 0x5f000 and at 0x7f000
reader.BaseStream.Seek(0x1f000, SeekOrigin.Begin);
try
{
// Now check the magic
if (reader.ReadUInt32() != 0x574255aa)
{
return(false);
}
// Then read the number of images
numImages = reader.ReadUInt32();
// Now skip one 32 bit word
reader.BaseStream.Seek(sizeof(uint), SeekOrigin.Current);
// Finally check the last magic
if (reader.ReadUInt32() != 0x57425963)
{
return(false);
}
}
catch (Exception)
{
return(false);
}
// Now we can read the image structs
for (int image = 0; image < numImages; image++)
{
ImageHeader head;
if (!ReadEntryHeader(reader, out head))
{
return(false);
}
ImageEntry entry = new ImageEntry(head.ImageName, head.ImageType,
head.ExecuteAddress);
if (!ReadEntryData(reader, head, out entry.Data))
{
return(false);
}
if (!CheckAddEntry(entry))
{
return(false);
}
Images.Add(entry);
}
return(true);
}
public NandImage()
{
Header = new BootHeader();
Images = new List <ImageEntry>();
}