public WatchpointDescriptor(ulong address, SysbusAccessWidth width, Access access, BusHookDelegate hook)
{
Address = address;
Width = width;
Access = access;
Hook = hook;
}
private static IEnumerable <WatchpointDescriptor> CalculateAllCoveringAddressess(ulong address, uint kind, Access access, BusHookDelegate hook)
{
foreach (SysbusAccessWidth width in Enum.GetValues(typeof(SysbusAccessWidth)))
{
for (var offset = -(long)(address % (ulong)width); offset < kind; offset += (long)width)
{
yield return(new WatchpointDescriptor(address - (ulong)(-offset), width, access, hook));
}
}
}
private void RemoveWatchpointsCoveringMemoryArea(ulong address, uint kind, Access access, BusHookDelegate hook)
{
// we need to unregister hooks from all possible access widths convering memory fragment
// [address, address + kind) referred by GDB
foreach (var descriptor in CalculateAllCoveringAddressess(address, kind, access, hook))
{
lock (watchpoints)
{
if (watchpoints[descriptor] > 1)
{
watchpoints[descriptor]--;
}
else
{
watchpoints.Remove(descriptor);
manager.Machine.SystemBus.RemoveWatchpointHook(descriptor.Address, hook);
}
}
}
}
private void AddWatchpointsCoveringMemoryArea(ulong address, uint kind, Access access, BusHookDelegate hook)
{
// we need to register hooks for all possible access widths covering memory fragment
// [address, address + kind) referred by GDB
foreach (var descriptor in CalculateAllCoveringAddressess(address, kind, access, hook))
{
lock (watchpoints)
{
if (watchpoints.ContainsKey(descriptor))
{
watchpoints[descriptor]++;
}
else
{
watchpoints.Add(descriptor, 1);
manager.Machine.SystemBus.AddWatchpointHook(descriptor.Address, descriptor.Width, access, hook);
}
}
}
}
public bool ContainsAction(BusHookDelegate actionToTest)
{
return(action == actionToTest);
}
public BusHookHandler(BusHookDelegate action, SysbusAccessWidth width)
{
this.action = action;
this.width = width;
Enabled = true;
}