/// <summary>
/// Attempts to get descriptors of the outpoints of the specified class and subclass.
/// </summary>
/// <param name="CallerProcess">The process which owns the memory containing the <paramref cref="request"/>.</param>
/// <param name="Class">The class of outpoint to search for.</param>
/// <param name="Subclass">The subclass of outpoint to search for.</param>
/// <param name="request">A pointer to the request structure (Also used to store the result(s)).</param>
/// <returns>True if the request was successful. Otherwise, false.</returns>
public static bool GetPipeOutpoints(Process CallerProcess, PipeClasses Class, PipeSubclasses Subclass, PipeOutpointsRequest *request)
{
// Validate inputs & get caller process
if (CallerProcess == null)
{
return(false);
}
// Merge memory layouts
// so we can access the request structure
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(CallerProcess);
bool OK = true;
// More validate inputs
// - Check request exists (should've been pre-allocated by caller)
// - Check request->Outpoints exists (should've been pre-allocated by caller)
// - Check request->MaxDescriptors was set correctly
if (request == null)
{
// Should have been pre-allocated by the calling thread (/process)
OK = false;
}
else if (request->Outpoints == null)
{
// Should have been pre-allocated by the calling thread (/process)
OK = false;
}
else if (request->MaxDescriptors == 0)
{
// Not technically an error but let's not waste time processing 0 descriptors
OK = true;
}
if (OK)
{
// Search for all outpoints of correct class and subclass
int maxDescriptors = request->MaxDescriptors;
for (int i = 0, j = 0; i < PipeOutpoints.Count && j < maxDescriptors; i++)
{
PipeOutpoint anOutpoint = (PipeOutpoint)PipeOutpoints[i];
if (anOutpoint.Class == Class &&
anOutpoint.Subclass == Subclass &&
(anOutpoint.MaxConnections == PipeConstants.UnlimitedConnections ||
anOutpoint.NumConnections < anOutpoint.MaxConnections))
{
// Set the resultant values
request->Outpoints[j++].ProcessId = anOutpoint.ProcessId;
}
}
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
return(OK);
}
public static unsafe SystemCallResults HandleDeferredSystemCall(
Process CallerProcess, Thread CallerThread,
SystemCallNumbers syscallNumber, uint Param1, uint Param2, uint Param3,
ref uint Return2, ref uint Return3, ref uint Return4)
{
SystemCallResults result = SystemCallResults.Unhandled;
switch (syscallNumber)
{
case SystemCallNumbers.StartThread:
//BasicConsole.WriteLine("DSC: Start Thread");
Return2 = CallerProcess.CreateThread((ThreadStartMethod)Utilities.ObjectUtilities.GetObject((void *)Param1), "[From sys call]").Id;
//BasicConsole.WriteLine("DSC: Start Thread - done.");
result = SystemCallResults.OK;
break;
case SystemCallNumbers.RegisterPipeOutpoint:
{
//BasicConsole.WriteLine("DSC: Register Pipe Outpoint");
Pipes.PipeOutpoint outpoint;
bool registered = Pipes.PipeManager.RegisterPipeOutpoint(CallerProcess.Id, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, (int)Param3, out outpoint);
if (registered)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Register Pipe Outpoint - done.");
}
break;
case SystemCallNumbers.GetNumPipeOutpoints:
{
//BasicConsole.WriteLine("DSC: Get Num Pipe Outpoints");
int numOutpoints;
bool obtained = Pipes.PipeManager.GetNumPipeOutpoints((Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, out numOutpoints);
if (obtained)
{
result = SystemCallResults.OK;
Return2 = (uint)numOutpoints;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Get Num Pipe Outpoints - done");
}
break;
case SystemCallNumbers.GetPipeOutpoints:
{
//BasicConsole.WriteLine("DSC: Get Pipe Outpoints");
bool obtained = Pipes.PipeManager.GetPipeOutpoints(CallerProcess, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, (Pipes.PipeOutpointsRequest *)Param3);
if (obtained)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Get Pipe Outpoints - done");
}
break;
case SystemCallNumbers.CreatePipe:
{
//BasicConsole.WriteLine("DSC: Create Pipe");
bool created = Pipes.PipeManager.CreatePipe(CallerProcess.Id, Param1, (Pipes.CreatePipeRequest *)Param2);
if (created)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Create Pipe - done");
}
break;
case SystemCallNumbers.WaitOnPipeCreate:
{
//BasicConsole.WriteLine("DSC: Wait On Pipe Create");
bool waiting = Pipes.PipeManager.WaitOnPipeCreate(CallerProcess.Id, CallerThread.Id, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2);
if (waiting)
{
result = SystemCallResults.Deferred;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Wait On Pipe Create - done");
}
break;
case SystemCallNumbers.ReadPipe:
{
//BasicConsole.WriteLine("DSC: Read Pipe");
// Need access to calling process' memory to be able to set values in request structure(s)
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(CallerProcess);
Pipes.ReadPipeRequest * RequestPtr = (Pipes.ReadPipeRequest *)Param1;
Pipes.PipeManager.RWResults RWResult = Pipes.PipeManager.ReadPipe(RequestPtr->PipeId, RequestPtr->Blocking, CallerProcess, CallerThread);
if (RWResult == Pipes.PipeManager.RWResults.Error)
{
result = SystemCallResults.Fail;
}
else
{
// Returning Deferred state from here will leave the caller thread
// in whatever state ReadPipe decided it should be in.
result = SystemCallResults.Deferred;
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
//BasicConsole.WriteLine("DSC: Read Pipe - done");
}
break;
case SystemCallNumbers.WritePipe:
{
//BasicConsole.WriteLine("DSC: Write Pipe");
// Need access to calling process' memory to be able to set values in request structure(s)
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(CallerProcess);
Pipes.WritePipeRequest * RequestPtr = (Pipes.WritePipeRequest *)Param1;
Pipes.PipeManager.RWResults RWResult = Pipes.PipeManager.WritePipe(RequestPtr->PipeId, RequestPtr->Blocking, CallerProcess, CallerThread);
if (RWResult == Pipes.PipeManager.RWResults.Error)
{
result = SystemCallResults.Fail;
}
else
{
// Returning Deferred state from here will leave the caller thread
// in whatever state WritePipe decided it should be in.
result = SystemCallResults.Deferred;
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
//BasicConsole.WriteLine("DSC: Write Pipe - done");
}
break;
default:
BasicConsole.WriteLine("DSC: Unrecognised call number.");
BasicConsole.WriteLine((uint)syscallNumber);
break;
}
return(result);
}
/// <summary>
/// Attempts to write to the specified pipe.
/// </summary>
/// <remarks>
/// Note that this function is non-blocking. It will, however, block a system caller thread by simply not returning it from
/// the deferred system call.
/// </remarks>
/// <param name="PipeId">The Id of the pipe to write.</param>
/// <param name="Blocking">Whether the write should be blocking or non-blocking.</param>
/// <param name="CallerProcess">The process which made the call.</param>
/// <param name="CallerThread">The thread which made the call.</param>
/// <returns>See descriptions on <see cref="PipeManager.RWResults"/> values.</returns>
public static RWResults WritePipe(int PipeId, bool Blocking, Process CallerProcess, Thread CallerThread)
{
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Validating inputs");
#endif
// Validate inputs
// - Check pipe exists
Pipe pipe = GetPipe(PipeId);
if (pipe == null)
{
return(RWResults.Error);
}
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Checking caller allowed to write");
#endif
// Check the caller is allowed to access the pipe
if (!AllowedToWritePipe(pipe, CallerProcess.Id))
{
return(RWResults.Error);
}
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Getting out process");
#endif
// Get outpoint process
Process OutProcess = ProcessManager.GetProcessById(pipe.Outpoint.ProcessId);
if (OutProcess == null)
{
return(RWResults.Error);
}
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Getting in process");
#endif
// Get inpoint process
Process InProcess = ProcessManager.GetProcessById(pipe.Inpoint.ProcessId);
if (InProcess == null)
{
return(RWResults.Error);
}
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Merging memory layouts");
#endif
// Merge memory layouts of in process (out process should already have been done by caller)
// so we can access the request structure(s) and buffers
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(InProcess);
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Adding caller to write queue");
#endif
// Add caller thread to the write queue
WritePipeRequest *Request = (WritePipeRequest *)CallerThread.Param1;
pipe.QueueToWrite(CallerThread.Id, Request->Length);
// Set up initial failure return value
CallerThread.Return1 = (uint)SystemCallResults.Fail;
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Processing pipe queue");
#endif
// Process the pipe queue
ProcessPipeQueue(pipe, OutProcess, InProcess);
#if PIPES_TRACE
BasicConsole.WriteLine("WritePipe: Unmerging memory layouts");
#endif
// Unmerge memory layouts
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
bool Completed = !pipe.AreThreadsWaitingToWrite();
if (!Blocking)
{
if (!Completed)
{
uint temp;
bool removed = pipe.RemoveLastToWrite(out temp);
if (!removed || temp != CallerThread.Id)
{
BasicConsole.WriteLine("PipeManager: Error! Async write failed and then removing last from queue resulted in thread Id mismatch!");
}
CallerThread.Return1 = (uint)SystemCallResults.Fail;
CallerThread._Wake();
}
}
return(Completed ? RWResults.Complete : RWResults.Queued);
}
/// <summary>
/// Attempts to create a new pipe.
/// </summary>
/// <param name="InProcessId">The Id of the target process which owns the inpoint.</param>
/// <param name="OutProcessId">The Id of the target process which owns the outpoint.</param>
/// <param name="request">A pointer to the request structure (Also used to store the result).</param>
/// <returns>True if the request was successful. Otherwise, false.</returns>
public static bool CreatePipe(uint InProcessId, uint OutProcessId, CreatePipeRequest *request)
{
// Validate inputs
// - Check out process exists
// - Check in process exists
// - Check request isn't null (should've been pre-allocated)
Process InProcess = ProcessManager.GetProcessById(InProcessId);
if (InProcess == null)
{
return(false);
}
else if (ProcessManager.GetProcessById(OutProcessId) == null)
{
return(false);
}
else if (request == null)
{
return(false);
}
// Merge memory layouts
// so we can access the request structure
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(InProcess);
bool OK = true;
// Find the outpoint
PipeOutpoint outpoint = GetOutpoint(OutProcessId, request->Class, request->Subclass);
// Check that we actually found the outpoint
if (outpoint == null)
{
OK = false;
}
if (OK)
{
// Check there are sufficient connections available
if (outpoint.NumConnections >= outpoint.MaxConnections &&
outpoint.MaxConnections != PipeConstants.UnlimitedConnections)
{
OK = false;
}
if (OK)
{
// Create new inpoint
PipeInpoint inpoint = new PipeInpoint(InProcessId, request->Class, request->Subclass);
// Create new pipe
Pipe pipe = new Pipe(PipeIdGenerator++, outpoint, inpoint, request->BufferSize);
// Add new pipe to list of pipes
Pipes.Add(pipe);
// Increment number of connections to the outpoint
outpoint.NumConnections++;
// Set result information
request->Result.Id = pipe.Id;
// Wake any threads (/processes) which were waiting on a pipe to be created
WakeWaitingThreads(outpoint, pipe.Id);
}
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
return(OK);
}
public static void Main()
{
// The serial ports should have already been initialised
MsgPort = Serial.COM2;
NotifPort = Serial.COM3;
// This looks silly, but the host debugger is actually waiting for this
// to determine the OS has connected and is ready
MsgPort.Write("Debug thread :D\n");
//MsgPort.Write("Enabling...\n");
// Everything is initialised and connected, so enable the debugger
Enabled = true;
//MsgPort.Write("Enabled.\n");
// Note: It doesn't actually matter if the host hasn't connected
// because the debugger has near-zero effective cost to the rest of the system
// unless it is sent a command (unlike the old debugger, which slowed everything
// down to the point of being unusable).
while (!Terminating)
{
// Read in a line from the host
FOS_System.String line = "";
char c = (char)MsgPort.Read();
while (c != '\n' && c != '\r')
{
line += c;
c = (char)MsgPort.Read();
}
// Echo the command back to the host for verification
MsgPort.Write("START OF COMMAND\n");
MsgPort.Write(line);
MsgPort.Write("\n");
// Filter the line
line = line.Trim().ToLower();
// Split it up into relevant parts
List lineParts = line.Split(' ');
if (lineParts.Count > 0)
{
FOS_System.String cmd = (FOS_System.String)lineParts[0];
if (cmd == "ping")
{
MsgPort.Write("pong\n");
}
else if (cmd == "help")
{
#region Help
MsgPort.Write("Available commands:\n");
MsgPort.Write(" - ping\n");
MsgPort.Write(" - threads\n");
MsgPort.Write(" - suspend (processId) (threadId | -1 for all threads)\n");
MsgPort.Write(" - resume (processId) (threadId | -1 for all threads)\n");
MsgPort.Write(" - step (processId) (threadId | -1 for all threads)\n");
MsgPort.Write(" - ss (processId) (threadId | -1 for all threads)\n");
MsgPort.Write(" - sta (processId) (threadId | -1 for all threads) (address)\n");
MsgPort.Write(" - bps (address:hex)\n");
MsgPort.Write(" - bpc (address:hex)\n");
MsgPort.Write(" - regs (processId) (threadId)\n");
MsgPort.Write(" - memory (processId) (address:hex) (length) (units:1,2,4)\n");
#endregion
}
else if (cmd == "threads")
{
#region Threads
for (int i = 0; i < ProcessManager.Processes.Count; i++)
{
Process AProcess = (Process)ProcessManager.Processes[i];
MsgPort.Write(" - Process : ");
MsgPort.Write((FOS_System.String)AProcess.Id);
MsgPort.Write(" : ");
MsgPort.Write(AProcess.Name);
MsgPort.Write("\n");
for (int j = 0; j < AProcess.Threads.Count; j++)
{
Thread AThread = (Thread)AProcess.Threads[j];
MsgPort.Write(" - Thread : ");
MsgPort.Write((FOS_System.String)AThread.Id);
MsgPort.Write(" : ");
if (AThread.Debug_Suspend)
{
MsgPort.Write("Suspended");
}
else if (AThread.TimeToSleep == -1)
{
MsgPort.Write("Waiting ");
}
else if (AThread.TimeToSleep > 0)
{
MsgPort.Write("Sleeping ");
}
else
{
MsgPort.Write("Running ");
}
MsgPort.Write(" : ");
MsgPort.Write(AThread.Name);
MsgPort.Write("\n");
}
}
#endregion
}
else if (cmd == "suspend")
{
#region Suspend
if (lineParts.Count == 3)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
int ThreadId = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[2]);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
if (ThreadId == -1)
{
for (int i = 0; i < TheProcess.Threads.Count; i++)
{
Thread AThread = ((Thread)TheProcess.Threads[i]);
if (AThread != MainThread)
{
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | AThread.Id;
if (ThreadsToSuspend.IndexOf(ProcessThreadId) == -1)
{
ThreadsToSuspend.Add(ProcessThreadId);
}
AThread.Debug_Suspend = true;
MsgPort.Write(" > Suspended ");
MsgPort.Write(AThread.Name);
MsgPort.Write(" thread\n");
}
}
}
else
{
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | (uint)ThreadId;
if (ThreadsToSuspend.IndexOf(ProcessThreadId) == -1)
{
ThreadsToSuspend.Add(ProcessThreadId);
}
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
if (TheThread != MainThread)
{
TheThread.Debug_Suspend = true;
MsgPort.Write(" > Suspended ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" thread\n");
}
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "resume")
{
#region Resume
if (lineParts.Count == 3)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
int ThreadId = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[2]);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
if (ThreadId == -1)
{
for (int i = 0; i < TheProcess.Threads.Count; i++)
{
Thread AThread = ((Thread)TheProcess.Threads[i]);
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | AThread.Id;
ThreadsToSuspend.Remove(ProcessThreadId);
AThread.Debug_Suspend = false;
MsgPort.Write(" > Resumed ");
MsgPort.Write(AThread.Name);
MsgPort.Write(" thread\n");
}
}
else
{
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | (uint)ThreadId;
ThreadsToSuspend.Remove(ProcessThreadId);
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
TheThread.Debug_Suspend = false;
MsgPort.Write(" > Resumed ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" thread\n");
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "step")
{
#region Step
if (lineParts.Count == 3)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
int ThreadId = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[2]);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
if (ThreadId == -1)
{
for (int i = 0; i < TheProcess.Threads.Count; i++)
{
Thread AThread = ((Thread)TheProcess.Threads[i]);
if (AThread.Debug_Suspend)
{
AThread.Debug_Suspend = false;
MsgPort.Write(" > Stepping ");
MsgPort.Write(AThread.Name);
MsgPort.Write(" thread\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
}
else
{
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
if (TheThread.Debug_Suspend)
{
TheThread.Debug_Suspend = false;
MsgPort.Write(" > Stepping ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" thread\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "ss")
{
#region Single Step
if (lineParts.Count == 3)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
int ThreadId = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[2]);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
if (ThreadId == -1)
{
for (int i = 0; i < TheProcess.Threads.Count; i++)
{
Thread AThread = ((Thread)TheProcess.Threads[i]);
if (AThread.Debug_Suspend)
{
// Set trap flag (int1)
AThread.EFLAGSFromInterruptStack |= 0x0100;
AThread.Debug_Suspend = false;
MsgPort.Write(" > Single stepping ");
MsgPort.Write(AThread.Name);
MsgPort.Write(" thread\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
}
else
{
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
if (TheThread.Debug_Suspend)
{
// Set trap flag (int1)
TheThread.EFLAGSFromInterruptStack |= 0x0100;
TheThread.Debug_Suspend = false;
MsgPort.Write(" > Single stepping ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" thread\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "sta")
{
#region Step To Address
if (lineParts.Count == 4)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
int ThreadId = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[2]);
uint Address = FOS_System.Int32.Parse_HexadecimalUnsigned((FOS_System.String)lineParts[3], 0);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
if (ThreadId == -1)
{
for (int i = 0; i < TheProcess.Threads.Count; i++)
{
Thread AThread = ((Thread)TheProcess.Threads[i]);
if (AThread.Debug_Suspend)
{
// Set trap flag (int1)
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | (uint)ThreadId;
ThreadsToSuspendAtAddresses.Add(ProcessThreadId, Address);
AThread.EFLAGSFromInterruptStack |= 0x0100;
AThread.Debug_Suspend = false;
MsgPort.Write(" > Single stepping ");
MsgPort.Write(AThread.Name);
MsgPort.Write(" thread to address ");
MsgPort.Write(Address);
MsgPort.Write("\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
}
else
{
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
if (TheThread.Debug_Suspend)
{
// Set trap flag (int1)
UInt64 ProcessThreadId = (((UInt64)ProcessId) << 32) | (uint)ThreadId;
ThreadsToSuspendAtAddresses.Add(ProcessThreadId, Address);
TheThread.EFLAGSFromInterruptStack |= 0x0100;
TheThread.Debug_Suspend = false;
MsgPort.Write(" > Single stepping ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" thread to address ");
MsgPort.Write(Address);
MsgPort.Write("\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "bps")
{
#region Set Breakpoint
if (lineParts.Count == 2)
{
uint Address = FOS_System.Int32.Parse_HexadecimalUnsigned((FOS_System.String)lineParts[1], 0);
MsgPort.Write(" > Breakpoint to be set at ");
MsgPort.Write(Address);
MsgPort.Write("\n");
*((byte *)Address) = 0xCC;
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "bpc")
{
#region Clear Breakpoint
if (lineParts.Count == 2)
{
uint Address = FOS_System.Int32.Parse_HexadecimalUnsigned((FOS_System.String)lineParts[1], 0);
MsgPort.Write(" > Breakpoint to be cleared at ");
MsgPort.Write(Address);
MsgPort.Write("\n");
*((byte *)Address) = 0x90;
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "regs")
{
#region Registers
if (lineParts.Count == 3)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
uint ThreadId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[2], 0);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
Thread TheThread = ProcessManager.GetThreadById((uint)ThreadId, TheProcess);
if (TheThread != null)
{
if (TheThread.Debug_Suspend)
{
MsgPort.Write("Registers of ");
MsgPort.Write(TheThread.Name);
MsgPort.Write(" : \n");
MsgPort.Write(" > EAX : ");
MsgPort.Write((FOS_System.String)TheThread.EAXFromInterruptStack);
MsgPort.Write("\n > EBX : ");
MsgPort.Write((FOS_System.String)TheThread.EBXFromInterruptStack);
MsgPort.Write("\n > ECX : ");
MsgPort.Write((FOS_System.String)TheThread.ECXFromInterruptStack);
MsgPort.Write("\n > EDX : ");
MsgPort.Write((FOS_System.String)TheThread.EDXFromInterruptStack);
MsgPort.Write("\n");
MsgPort.Write("\n > ESP : ");
MsgPort.Write((FOS_System.String)TheThread.ESPFromInterruptStack);
MsgPort.Write("\n > EBP : ");
MsgPort.Write((FOS_System.String)TheThread.EBPFromInterruptStack);
MsgPort.Write("\n > EIP : ");
MsgPort.Write((FOS_System.String)TheThread.EIPFromInterruptStack);
MsgPort.Write("\n");
}
else
{
MsgPort.Write("Thread must be suspended first.\n");
}
}
else
{
MsgPort.Write("Thread not found.\n");
}
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else if (cmd == "mem")
{
#region Memory
if (lineParts.Count == 5)
{
uint ProcessId = FOS_System.Int32.Parse_DecimalUnsigned((FOS_System.String)lineParts[1], 0);
Process TheProcess = ProcessManager.GetProcessById(ProcessId);
if (TheProcess != null)
{
// Need access to specified process' memory
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(TheProcess);
uint Address = FOS_System.Int32.Parse_HexadecimalUnsigned((FOS_System.String)lineParts[2], 0);
int length = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[3]);
int units = FOS_System.Int32.Parse_DecimalSigned((FOS_System.String)lineParts[4]);
MsgPort.Write(" Memory from ");
MsgPort.Write(Address);
MsgPort.Write(" for ");
MsgPort.Write(length);
MsgPort.Write(" units with ");
MsgPort.Write(units);
MsgPort.Write(" bytes/unit:\n");
if (units == 1)
{
byte *AddrPtr = (byte *)Address;
for (int i = 0; i < length; i++)
{
MsgPort.Write((FOS_System.String)AddrPtr[i]);
MsgPort.Write(" ");
}
}
else if (units == 2)
{
ushort *AddrPtr = (ushort *)Address;
for (int i = 0; i < length; i++)
{
MsgPort.Write((FOS_System.String)AddrPtr[i]);
MsgPort.Write(" ");
}
}
else if (units == 4)
{
uint *AddrPtr = (uint *)Address;
for (int i = 0; i < length; i++)
{
MsgPort.Write((FOS_System.String)AddrPtr[i]);
MsgPort.Write(" ");
}
}
MsgPort.Write("\n");
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
}
else
{
MsgPort.Write("Process not found.\n");
}
}
else
{
MsgPort.Write("Incorrect arguments, see help.\n");
}
#endregion
}
else
{
MsgPort.Write("Unrecognised command. (Note: Backspace not supported!)\n");
}
}
// Always issue end of command signal, even if something else went wrong
// - Keeps the host in sync.
MsgPort.Write("END OF COMMAND\n");
}
}