public static object ReadPointer(Type pointerType, int size, ImageReader rdr, ReaderContext ctx)
{
Debug.Print("Reading pointer at offset {0}, size {1}", rdr.Offset, size);
uint newOffset;
switch (size)
{
default:
throw new InvalidOperationException("Field size must be > 0.");
case 1: newOffset = rdr.ReadByte(); break;
case 2: newOffset = rdr.ReadUInt16(); break;
case 4: newOffset = rdr.ReadUInt32(); break;
}
Debug.Print("Structure of type {0} must start at offset {1:X}", pointerType.Name, newOffset);
rdr = rdr.Clone();
rdr.Offset = newOffset;
var dst = Activator.CreateInstance(pointerType);
var sr = new StructureReader(dst);
sr.Read(rdr);
return(dst);
}
public List<ProgramResource> ReadLanguageDirectory(ImageReader rdr, uint resourceType, string resourceId)
{
const uint DIR_MASK = 0x80000000;
var flags = rdr.ReadUInt32();
var date = rdr.ReadUInt32();
var version = rdr.ReadUInt32();
var cNameEntries = rdr.ReadUInt16();
var cIdEntries = rdr.ReadUInt16();
var entries = new List<ProgramResource>();
for (int i = 0; i < cNameEntries; ++i)
{
var rvaName = rdr.ReadUInt32();
var rvaEntry = rdr.ReadUInt32();
var subRdr = new LeImageReader(imgLoaded, rvaResources + (rvaEntry & ~DIR_MASK));
if ((rvaEntry & DIR_MASK) != 0)
throw new BadImageFormatException();
entries.Add(ReadResourceEntry(subRdr, resourceId, ReadResourceString(rvaName), resourceType));
}
for (int i = 0; i < cIdEntries; ++i)
{
var id = rdr.ReadUInt32();
var rvaEntry = rdr.ReadUInt32();
var subRdr = new LeImageReader(imgLoaded, rvaResources + (rvaEntry & ~DIR_MASK));
if ((rvaEntry & DIR_MASK) != 0)
throw new BadImageFormatException();
entries.Add(ReadResourceEntry(subRdr, resourceId, id.ToString(), resourceType));
}
return entries;
}
public void VisitPrimitive(PrimitiveType pt)
{
switch (pt.Size)
{
case 1:
fmt.WriteKeyword("db");
fmt.Write("\t");
fmt.Write(string.Format("0x{0:X2}", rdr.ReadByte()));
fmt.WriteLine();
return;
case 2:
fmt.WriteKeyword("dw");
fmt.Write("\t");
fmt.Write(string.Format("0x{0:X4}", rdr.ReadUInt16()));
fmt.WriteLine();
return;
case 4:
fmt.WriteKeyword("dd");
fmt.Write("\t");
fmt.Write(string.Format("0x{0:X8}", rdr.ReadUInt32()));
fmt.WriteLine();
return;
case 8:
fmt.WriteKeyword("dq");
fmt.Write("\t");
fmt.Write(string.Format("0x{0:X16}", rdr.ReadUInt32()));
fmt.WriteLine();
return;
}
throw new NotImplementedException();
}
public List<ProgramResource> ReadResourceDirectory(ImageReader rdr)
{
const uint DIR_MASK = 0x80000000;
var flags = rdr.ReadUInt32();
var date = rdr.ReadUInt32();
var version = rdr.ReadUInt32();
var cNameEntries = rdr.ReadUInt16();
var cIdEntries = rdr.ReadUInt16();
var entries = new List<ProgramResource>();
for (int i = 0; i < cNameEntries; ++i)
{
var rvaName = rdr.ReadUInt32();
var rvaEntry = rdr.ReadUInt32();
var subRdr = new LeImageReader(imgLoaded, rvaResources + (rvaEntry & ~DIR_MASK));
if ((rvaEntry & DIR_MASK) == 0)
throw new BadImageFormatException();
if ((rvaName & DIR_MASK) != 0)
{
var e = new ProgramResourceGroup
{
//Name = ReadResourceString(rvaName),
Name = ReadResourceUtf16leString(rvaResources + (rvaName & ~DIR_MASK)),
};
e.Resources.AddRange(ReadNameDirectory(subRdr, 0));
entries.Add(e);
}
}
for (int i = 0; i < cIdEntries; ++i)
{
var id = rdr.ReadUInt32();
var rvaEntry = rdr.ReadUInt32();
var subRdr = new LeImageReader(imgLoaded, rvaResources + (rvaEntry & ~DIR_MASK));
if ((rvaEntry & DIR_MASK) == 0)
throw new BadImageFormatException();
var e = new ProgramResourceGroup
{
Name = GenerateResourceName(id),
};
e.Resources.AddRange(ReadNameDirectory(subRdr, id));
entries.Add(e);
}
return entries;
}
public static Elf32_Sym Load(ImageReader rdr)
{
var sym = new Elf32_Sym();
sym.st_name = rdr.ReadUInt32();
sym.st_value = rdr.ReadUInt32();
sym.st_size = rdr.ReadUInt32();
sym.st_info = rdr.ReadByte();
sym.st_other = rdr.ReadByte();
sym.st_shndx = rdr.ReadUInt16();
return sym;
}
public ushort e_shstrndx; // section name string table index
public static Elf32_EHdr Load(ImageReader rdr)
{
return new Elf32_EHdr
{
e_type = rdr.ReadUInt16(),
e_machine = rdr.ReadUInt16(),
e_version = rdr.ReadUInt32(),
e_entry = rdr.ReadUInt32(),
e_phoff = rdr.ReadUInt32(),
e_shoff = rdr.ReadUInt32(),
e_flags = rdr.ReadUInt32(),
e_ehsize = rdr.ReadUInt16(),
e_phentsize = rdr.ReadUInt16(),
e_phnum = rdr.ReadUInt16(),
e_shentsize = rdr.ReadUInt16(),
e_shnum = rdr.ReadUInt16(),
e_shstrndx = rdr.ReadUInt16(),
};
}
public static object ReadPointer(Type pointerType, int size, ImageReader rdr, ReaderContext ctx)
{
Debug.Print("Reading pointer at offset {0}, size {1}", rdr.Offset, size);
uint newOffset;
switch (size)
{
default:
throw new InvalidOperationException("Field size must be > 0.");
case 1: newOffset = rdr.ReadByte(); break;
case 2: newOffset = rdr.ReadUInt16(); break;
case 4: newOffset = rdr.ReadUInt32(); break;
}
Debug.Print("Structure of type {0} must start at offset {1:X}", pointerType.Name, newOffset);
rdr = rdr.Clone();
rdr.Offset = newOffset;
var dst = Activator.CreateInstance(pointerType);
var sr = new StructureReader(dst);
sr.Read(rdr);
return dst;
}
public const short IMAGE_REL_MIPS_PAIR = 0x0025; // This relocation is only valid when it immediately follows a REFHI or SECRELHI relocation. Its SymbolTableIndex contains a displacement and not an index into the symbol table.
public override void ApplyRelocation(Address baseOfImage, uint page, ImageReader rdr, RelocationDictionary relocations)
{
ushort fixup = rdr.ReadUInt16();
Address offset = baseOfImage + page + (fixup & 0x0FFFu);
var imgR = program.CreateImageReader(offset);
var imgW = program.CreateImageWriter(offset);
uint w = imgR.ReadUInt32();
int s;
switch (fixup >> 12)
{
case IMAGE_REL_MIPS_ABSOLUTE:
// Used for padding to 4-byte boundary, ignore.
break;
case IMAGE_REL_MIPS_REFWORD:
break;
case IMAGE_REL_MIPS_JMPADDR:
break;
case IMAGE_REL_MIPS_REFHI:
w = imgR.ReadUInt32();
//w += (fixup & 0x0FFFu);
//imgW.WriteUInt32(w);
s = rdr.ReadInt16();
w = (uint)(w + s);
// w points to something.
break;
case IMAGE_REL_MIPS_REFLO:
// w points to something.
break;
default:
dcSvc.Warn(
dcSvc.CreateAddressNavigator(program, offset),
string.Format(
"Unsupported MIPS PE fixup type: {0:X}",
fixup >> 12));
break;
}
}