public HeapPointer(GlobalHeap heap, uint ptr, bool forWrite)
{
if (ptr != 0)
{
// Get the buffer
var buf = heap.GetBuffer(ptr, forWrite, out _ofs);
_pin = GCHandle.Alloc(buf, GCHandleType.Pinned);
}
}
public ushort GetDosEnvironmentSegment()
{
if (_hEnvironment == 0)
{
// Build environment strings
var env = string.Join("\0", Environment.Select(x => x.Key + "\0" + x.Value)) + "\0";
// Convert to byte array
var bytes = Encoding.GetEncoding(437).GetBytes(env);
// Allocate environment string
_hEnvironment = GlobalHeap.Alloc("DOS Environment Strings", Win16.GMEM_FIXED, (uint)bytes.Length);
// Write it
this.WriteBytes(_hEnvironment, 0, bytes);
}
return(_hEnvironment);
}
public LocalHeap(GlobalHeap globalHeap, ushort globalHandle, ushort baseOffset, ushort maxSize)
{
_globalHeap = globalHeap;
_globalHandle = globalHandle;
// Dont allocate at zero
if (baseOffset == 0)
{
baseOffset = 16;
}
// Work out top of heap
uint topOfHeap = _globalHeap.Size(globalHandle);
uint heapLimit = baseOffset + (uint)(maxSize == 0 ? 0x10000 : maxSize);
if (heapLimit > topOfHeap)
{
heapLimit = topOfHeap;
}
_allocator = new RangeAllocator <LocalAllocation>((int)heapLimit);
_freeHandles = new List <ushort>();
_handleOrPtrMap = new Dictionary <ushort, LocalAllocation>();
var reservedPage = _allocator.Alloc(baseOffset, false, false);
reservedPage.User = new LocalAllocation()
{
flags = Win16.LMEM_FIXED,
handleOrPtr = 0,
range = reservedPage,
};
_allocator.MoveListener = this;
_baseOffset = baseOffset;
}
public Machine()
{
if (!System.Diagnostics.Debugger.IsAttached)
{
AppDomain currentDomain = AppDomain.CurrentDomain;
currentDomain.UnhandledException += UnhandledException;
}
else
{
enableDebugger = true;
logExecution = true;
}
_pathMapper = new PathMapper(this);
_globalHeap = new GlobalHeap(this);
_stringHeap = new StringHeap(this);
_moduleManager = new ModuleManager(this);
_messaging = new Messaging(this);
_variableResolver = new VariableResolver();
_expressionContext = new ExpressionContext(this);
_symbolResolver = new SymbolResolver(this);
_stackWalker = new StackWalker(this);
_expressionContext.PushSymbolScope(_symbolResolver);
this.MemoryBus = _globalHeap;
RegisterVariables();
// Create system heaps
_systemCodeSelector = _globalHeap.Alloc("System Thunks", 0, 0x10000);
_globalHeap.SetSelectorAttributes(_systemCodeSelector, true, true);
_systemDataHeap = _globalHeap.CreateLocalHeap("System Local Heap", 0);
_globalHeap.SetSelectorAttributes(_systemDataHeap.GlobalHandle, false, false);
// Initialise the system return thunk
CreateSysRetThunk();
// Creae DOS Api handler
_dos = new DosApi(this, this);
// Load standard modules
_kernel = _moduleManager.LoadModule(new Kernel()) as Kernel;
_user = _moduleManager.LoadModule(new User()) as User;
_moduleManager.LoadModule(new Gdi());
_moduleManager.LoadModule(new MMSystem());
_moduleManager.LoadModule(new Keyboard());
// _moduleManager.LoadModule(new Shell());
_moduleManager.LoadModule(new DdeML());
_moduleManager.LoadModule(new Sound());
_disassembler = new Disassembler(this);
this.InstructionHook = () =>
{
if (logExecution)
{
_disassembled = null;
Log.WriteLine(_variableResolver.ResolveTokenizedString(_logExecutionFormat));
}
};
}
