public void UShortFixup()
{
var bytes = new byte[] { 0x01, 0x02, 0x03 };
var img = new MemoryArea(Address.SegPtr(0x0C00, 0), bytes);
ushort newSeg = img.FixupLeUInt16(1, 0x4444);
Assert.AreEqual(0x4746, newSeg);
}
public override RelocationResults Relocate(Program program, Address addrLoad)
{
EndianImageReader rdr = new LeImageReader(RawImage, hdrOffset + relocationsOffset);
ushort segCode = (ushort)(addrLoad.Selector.Value + (ExeImageLoader.CbPsp >> 4));
ushort dx = 0;
for (; ;)
{
int cx = rdr.ReadLeUInt16();
if (cx != 0)
{
uint relocBase = ExeImageLoader.CbPsp + dx * 0x10u;
do
{
ushort relocOff = rdr.ReadLeUInt16();
ushort seg = imgU.FixupLeUInt16(relocBase + relocOff, segCode);
var segment = segmentMap.AddSegment(new ImageSegment(
seg.ToString("X4"),
Address.SegPtr(seg, 0),
imgU,
AccessMode.ReadWriteExecute));
} while (--cx != 0);
}
if (dx == 0xF000)
{
break;
}
dx += (ushort)0x1000U;
}
this.cs += segCode;
segmentMap.AddOverlappingSegment(cs.ToString("X4"), imgU, Address.SegPtr(cs, 0), AccessMode.ReadWriteExecute);
this.ss += segCode;
var state = arch.CreateProcessorState();
state.SetRegister(Registers.ds, Constant.Word16(addrLoad.Selector.Value));
state.SetRegister(Registers.es, Constant.Word16(addrLoad.Selector.Value));
state.SetRegister(Registers.cs, Constant.Word16(cs));
state.SetRegister(Registers.ss, Constant.Word16(ss));
state.SetRegister(Registers.bx, Constant.Word16(0));
var ep = new ImageSymbol(Address.SegPtr(cs, ip))
{
ProcessorState = state
};
var entryPoints = new List <ImageSymbol> {
ep
};
var imageSymbols = entryPoints.ToSortedList(e => e.Address, e => e);
return(new RelocationResults(entryPoints, imageSymbols));
}