public override RelocationResults Relocate(Address addrLoad)
{
ImageMap imageMap = imgLoadedMap;
ImageReader rdr = new LeImageReader(exe.RawImage, (uint) exe.e_lfaRelocations);
var relocations = new RelocationDictionary();
int i = exe.e_cRelocations;
while (i != 0)
{
uint offset = rdr.ReadLeUInt16();
ushort segOffset = rdr.ReadLeUInt16();
offset += segOffset * 0x0010u;
ushort seg = (ushort) (imgLoaded.ReadLeUInt16(offset) + addrLoad.Selector);
imgLoaded.WriteLeUInt16(offset, seg);
relocations.AddSegmentReference(offset, seg);
imageMap.AddSegment(Address.SegPtr(seg, 0), seg.ToString("X4"), AccessMode.ReadWriteExecute);
--i;
}
// Found the start address.
Address addrStart = Address.SegPtr((ushort)(exe.e_cs + addrLoad.Selector), exe.e_ip);
imageMap.AddSegment(Address.SegPtr(addrStart.Selector, 0), addrStart.Selector.ToString("X4"), AccessMode.ReadWriteExecute);
return new RelocationResults(
new List<EntryPoint> { new EntryPoint(addrStart, arch.CreateProcessorState()) },
relocations);
}
public void AddSegmentRelocation()
{
RelocationDictionary rd = new RelocationDictionary();
rd.AddSegmentReference(0xD234, 0x0C00);
Assert.AreEqual(1, rd.Count);
Constant c = rd[0xD234];
Assert.AreEqual("selector", c.DataType.ToString());
}
// Unpacks the relocation entries in a LzExe 0.91 binary
private ImageMap Relocate91(byte [] abUncompressed, ushort segReloc, LoadedImage pgmImgNew, RelocationDictionary relocations)
{
const int CompressedRelocationTableAddress = 0x0158;
int ifile = lzHdrOffset + CompressedRelocationTableAddress;
int rel_off=0;
for (;;)
{
ushort span = abUncompressed[ifile++];
if (span == 0)
{
span = abUncompressed[ifile++];
span |= (ushort) (abUncompressed[ifile++] << 8);
if (span == 0)
{
rel_off += 0x0FFF0;
continue;
}
else if (span == 1)
{
break;
}
}
rel_off += span;
ushort seg = (ushort) (pgmImgNew.ReadLeUInt16((uint)rel_off) + segReloc);
pgmImgNew.WriteLeUInt16((uint)rel_off, seg);
relocations.AddSegmentReference((uint)rel_off, seg);
imageMap.AddSegment(Address.SegPtr(seg, 0), seg.ToString("X4"), AccessMode.ReadWriteExecute);
}
return imageMap;
}
public override RelocationResults Relocate(Address addrLoad)
{
var relocations = new RelocationDictionary();
ushort segCode = (ushort) (addrLoad.Selector + (PspSize >> 4));
for (;;)
{
int relocs = (ushort) bitStm.GetByte();
if (relocs == 0)
break;
uint relocBase = PspSize + bitStm.GetWord() * 0x10u;
do
{
ushort relocOff = bitStm.GetWord();
ushort seg = imgU.ReadLeUInt16(relocBase + relocOff);
seg = (ushort) (seg + segCode);
imgU.WriteLeUInt16(relocBase + relocOff, seg);
relocations.AddSegmentReference(relocBase + relocOff, seg);
imageMap.AddSegment(Address.SegPtr(seg, 0), seg.ToString("X4"), AccessMode.ReadWriteExecute);
} while (--relocs != 0);
}
ushort pklSs = (ushort) (bitStm.GetWord() + segCode);
ushort pklSp = (ushort) bitStm.GetWord();
pklCs = (ushort) (bitStm.GetWord() + segCode);
pklIp = bitStm.GetWord();
var state = arch.CreateProcessorState();
state.SetRegister(Registers.ds, Constant.Word16(addrLoad.Selector));
state.SetRegister(Registers.es, Constant.Word16(addrLoad.Selector));
state.SetRegister(Registers.cs, Constant.Word16(pklCs));
state.SetRegister(Registers.ax, Constant.Word16(0));
state.SetRegister(Registers.bx, Constant.Word16(0));
state.SetRegister(Registers.cx, Constant.Word16(0));
state.SetRegister(Registers.dx, Constant.Word16(0));
state.SetRegister(Registers.bp, Constant.Word16(0));
state.SetRegister(Registers.sp, Constant.Word16(pklSp));
state.SetRegister(Registers.si, Constant.Word16(0));
state.SetRegister(Registers.di, Constant.Word16(0));
return new RelocationResults(
new List<EntryPoint> {new EntryPoint(Address.SegPtr(pklCs, pklIp), state) },
relocations);
}
