1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
using Ryujinx.Common.Logging;
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
{
// Atmosphere specifies a delay of 83 milliseconds between the execution of the last
// cheat and the re-execution of the first one.
private const int TamperMachineSleepMs = 1000 / 12;
private Thread _tamperThread = null;
private readonly ConcurrentQueue<ITamperProgram> _programs = new();
private long _pressedKeys = 0;
private readonly Dictionary<string, ITamperProgram> _programDictionary = new();
private void Activate()
{
if (_tamperThread == null || !_tamperThread.IsAlive)
{
_tamperThread = new Thread(this.TamperRunner)
{
Name = "HLE.TamperMachine",
};
_tamperThread.Start();
}
}
internal void InstallAtmosphereCheat(string name, string buildId, IEnumerable<string> rawInstructions, ProcessTamperInfo info, ulong exeAddress)
{
if (!CanInstallOnPid(info.Process.Pid))
{
return;
}
ITamperedProcess tamperedProcess = new TamperedKProcess(info.Process);
AtmosphereCompiler compiler = new(exeAddress, info.HeapAddress, info.AliasAddress, info.AslrAddress, tamperedProcess);
ITamperProgram program = compiler.Compile(name, rawInstructions);
if (program != null)
{
program.TampersCodeMemory = false;
_programs.Enqueue(program);
_programDictionary.TryAdd($"{buildId}-{name}", program);
}
Activate();
}
private static bool CanInstallOnPid(ulong 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;
}
public void EnableCheats(string[] enabledCheats)
{
foreach (var program in _programDictionary.Values)
{
program.IsEnabled = false;
}
foreach (var cheat in enabledCheats)
{
if (_programDictionary.TryGetValue(cheat, out var program))
{
program.IsEnabled = true;
}
}
}
private static 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(TamperMachineSleepMs);
}
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.
_programDictionary.Clear();
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 {program.Name}");
try
{
ControllerKeys pressedKeys = (ControllerKeys)Thread.VolatileRead(ref _pressedKeys);
program.Process.TamperedCodeMemory = false;
program.Execute(pressedKeys);
// Detect the first attempt to tamper memory and log it.
if (!program.TampersCodeMemory && program.Process.TamperedCodeMemory)
{
program.TampersCodeMemory = true;
Logger.Warning?.Print(LogClass.TamperMachine, $"Tampering program {program.Name} modifies code memory so it may not work properly");
}
}
catch (Exception ex)
{
Logger.Debug?.Print(LogClass.TamperMachine, $"The tampering program {program.Name} 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);
}
}
}
|
