private void UpdateStack()
{
var oldStackList = MachineStack.Reverse().ToList();
MachineStack.Clear();
int currentSp = _debugger.CPU.SP;
ushort topStack = IsAnApp ? TopStackApp : (ushort)0xFFFF;
// avoid generating a massive callstack
if (currentSp < MachineStackBottom)
{
int maxStackSize = topStack - MachineStackBottom;
topStack = (ushort)(currentSp + maxStackSize);
}
if ((currentSp < _oldSp) || (currentSp < topStack && oldStackList.Count == 0))
{
// new stack entries to add
while (currentSp != _oldSp && currentSp <= topStack)
{
CallStackEntry callStackEntry = CheckValidCall(currentSp);
MachineStack.Push(new StackEntry((ushort)currentSp, ReadShort((ushort)currentSp), callStackEntry));
currentSp += 2;
}
}
else if (currentSp > _oldSp)
{
// stack entries to remove
oldStackList.RemoveAll(s => s.Address < currentSp);
}
foreach (StackEntry stackEntry in oldStackList)
{
int data = ReadShort((ushort)currentSp);
if (stackEntry.Data != data)
{
CallStackEntry callStackEntry = CheckValidCall(currentSp);
MachineStack.Push(new StackEntry((ushort)currentSp, (ushort)data, callStackEntry));
}
else
{
MachineStack.Push(stackEntry);
}
currentSp += 2;
}
_oldSp = _debugger.CPU.SP;
UpdateCallstack();
}
public StackEntry(ushort address, ushort data, CallStackEntry entry)
{
Address = address;
Data = data;
CallStackEntry = entry;
}