public override void Emit(x86Stream strm)
{
EmittedAddress = (uint)strm.Position;
Emitted = true;
bool movedInStream = false;
// Patch the instructions that have already been
// emitted, the rest will use our address without
// patching.
foreach (var instr in PreMarkingReferencedInstructions)
{
foreach (PatchableLocationDescription pldesc in instr.PatchableLocations)
{
if (pldesc.TargetLabel == this)
{
movedInStream = true;
strm.Position = pldesc.PatchLocation;
if (pldesc.Relative)
{
#warning Need to support relative patches
throw new Exception("This isn't currently supported! :(");
}
else
{
strm.WriteAddressLiteral(EmittedAddress);
}
}
}
}
if (movedInStream)
{
strm.Position = EmittedAddress;
}
}
public override void Emit(x86Stream strm)
{
if (PopSize == 0)
{
// No pop
if (Segment == x86Segment.CS)
{
// Near return
strm.WriteByte(0xC3);
}
else
{
// Far return
strm.WriteByte(0xCB);
}
}
else
{
// pop
if (Segment == x86Segment.CS)
{
// Near return
strm.WriteByte(0xC2);
strm.WriteImm16(PopSize);
}
else
{
// Far return
strm.WriteByte(0xCA);
strm.WriteImm16(PopSize);
}
}
}
public override void Emit(Stream strm)
{
x86Stream emissionStream = new x86Stream(strm);
for(int i = 0; i < Instructions.Count; i++)
{
Instructions[i].Emit(emissionStream);
}
}
public override void Emit(x86Stream strm)
{
strm.WriteByte(0x8B);
strm.WriteMem(0, 0);
this.PatchableLocations.Add(
new PatchableLocationDescription()
{
TargetLabel = target,
PatchLocation = (uint)strm.Position - 4,
}
);
}
public override void Emit(x86Stream strm)
{
strm.WriteByte(0x90);
}
public abstract void Emit(x86Stream strm);