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Add the TamperMachine module for runtime mods and cheats (#1928)

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* Add initial implementation of the Tamper Machine

* Implement Atmosphere opcodes 0, 4 and 9

* Add missing TamperCompilationException class

* Implement Atmosphere conditional and loop opcodes 1, 2 and 3

* Inplement input conditional opcode 8

* Add register store opcode A

* Implement extended pause/resume opcodes FF0 and FF1

* Implement extended log opcode FFF

* Implement extended register conditional opcode C0

* Refactor TamperProgram to an interface

* Moved Atmosphere classes to a separate subdirectory

* Fix OpProcCtrl class not setting process

* Implement extended register save/restore opcodes C1, C2 and C3

* Refactor code emitters to separate classes

* Supress memory access errors from the Tamper Machine

* Add debug information to tamper register and memory writes

* Add block stack check to Atmosphere Cheat compiler

* Add handheld input support to Tamper Machine

* Fix code styling

* Fix build id and cheat case mismatch

* Fix invalid immediate size selection

* Print build ids of the title

* Prevent Tamper Machine from change code regions

* Remove Atmosphere namespace

* Remove empty cheats from the list

* Prevent code modification without disabling the tampering

* Fix missing addressing mode in LoadRegisterWithMemory

* Fix wrong addressing in RegisterConditional

* Add name to the tamper machine thread

* Fix code styling
This commit is contained in:
Caian Benedicto 2021-03-27 11:12:05 -03:00 • committed by GitHub
parent a5d5ca0635
commit 0c1ea1212a
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71 changed files with 2793 additions and 5 deletions
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161
Ryujinx.HLE/HOS/TamperMachine.cs Normal file
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using Ryujinx.Common.Logging;
using Ryujinx.HLE.Exceptions;
using Ryujinx.HLE.HOS.Kernel;
using Ryujinx.HLE.HOS.Kernel.Process;
using Ryujinx.HLE.HOS.Services.Hid;
using Ryujinx.HLE.HOS.Tamper;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Threading;
namespace Ryujinx.HLE.HOS
{
public class TamperMachine
{
private Thread _tamperThread = null;
private ConcurrentQueue<ITamperProgram> _programs = new ConcurrentQueue<ITamperProgram>();
private long _pressedKeys = 0;
private void Activate()
{
if (_tamperThread == null || !_tamperThread.IsAlive)
{
_tamperThread = new Thread(this.TamperRunner);
_tamperThread.Name = "HLE.TamperMachine";
_tamperThread.Start();
}
}
internal void InstallAtmosphereCheat(IEnumerable<string> rawInstructions, ProcessTamperInfo info, ulong exeAddress)
{
if (!CanInstallOnPid(info.Process.Pid))
{
return;
}
ITamperedProcess tamperedProcess = new TamperedKProcess(info.Process);
AtmosphereCompiler compiler = new AtmosphereCompiler();
ITamperProgram program = compiler.Compile(rawInstructions, exeAddress, info.HeapAddress, tamperedProcess);
if (program != null)
{
_programs.Enqueue(program);
}
Activate();
}
private bool CanInstallOnPid(long pid)
{
// Do not allow tampering of kernel processes.
if (pid < KernelConstants.InitialProcessId)
{
Logger.Warning?.Print(LogClass.TamperMachine, $"Refusing to tamper kernel process {pid}");
return false;
}
return true;
}
private bool IsProcessValid(ITamperedProcess process)
{
return process.State != ProcessState.Crashed && process.State != ProcessState.Exiting && process.State != ProcessState.Exited;
}
private void TamperRunner()
{
Logger.Info?.Print(LogClass.TamperMachine, "TamperMachine thread running");
int sleepCounter = 0;
while (true)
{
// Sleep to not consume too much CPU.
if (sleepCounter == 0)
{
sleepCounter = _programs.Count;
Thread.Sleep(1);
}
else
{
sleepCounter--;
}
if (!AdvanceTamperingsQueue())
{
// No more work to be done.
Logger.Info?.Print(LogClass.TamperMachine, "TamperMachine thread exiting");
return;
}
}
}
private bool AdvanceTamperingsQueue()
{
if (!_programs.TryDequeue(out ITamperProgram program))
{
// No more programs in the queue.
return false;
}
// Check if the process is still suitable for running the tamper program.
if (!IsProcessValid(program.Process))
{
// Exit without re-enqueuing the program because the process is no longer valid.
return true;
}
// Re-enqueue the tampering program because the process is still valid.
_programs.Enqueue(program);
Logger.Debug?.Print(LogClass.TamperMachine, "Running tampering program");
try
{
ControllerKeys pressedKeys = (ControllerKeys)Thread.VolatileRead(ref _pressedKeys);
program.Execute(pressedKeys);
}
catch (CodeRegionTamperedException ex)
{
Logger.Debug?.Print(LogClass.TamperMachine, $"Prevented tampering program from modifing code memory");
if (!String.IsNullOrEmpty(ex.Message))
{
Logger.Debug?.Print(LogClass.TamperMachine, ex.Message);
}
}
catch (Exception ex)
{
Logger.Debug?.Print(LogClass.TamperMachine, $"The tampering program crashed, this can happen while the game is starting");
if (!String.IsNullOrEmpty(ex.Message))
{
Logger.Debug?.Print(LogClass.TamperMachine, ex.Message);
}
}
return true;
}
public void UpdateInput(List<GamepadInput> gamepadInputs)
{
// Look for the input of the player one or the handheld.
foreach (GamepadInput input in gamepadInputs)
{
if (input.PlayerId == PlayerIndex.Player1 || input.PlayerId == PlayerIndex.Handheld)
{
Thread.VolatileWrite(ref _pressedKeys, (long)input.Buttons);
return;
}
}
// Clear the input because player one is not conected.
Thread.VolatileWrite(ref _pressedKeys, 0);
}
}
}