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

* 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
2021-03-27 11:12:05 -03:00 · 2021-03-27 11:12:05 -03:00 · 0c1ea1212a
commit 0c1ea1212a
parent a5d5ca0635
71 changed files with 2793 additions and 5 deletions
--- a/Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs
+++ b/Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs
@ -0,0 +1,66 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.HOS.Kernel.Process;
+using System.Runtime.CompilerServices;
+
+namespace Ryujinx.HLE.HOS.Tamper
+{
+    class TamperedKProcess : ITamperedProcess
+    {
+        private KProcess _process;
+
+        public ProcessState State => _process.State;
+
+        public TamperedKProcess(KProcess process)
+        {
+            this._process = process;
+        }
+
+        private void AssertMemoryRegion<T>(ulong va, bool isWrite) where T : unmanaged
+        {
+            ulong size = (ulong)Unsafe.SizeOf<T>();
+
+            // TODO (Caian): This double check is workaround because CpuMemory.IsRangeMapped reports
+            // some addresses as mapped even though they are not, i. e. 4 bytes from 0xffffffffffffff70.
+            if (!_process.CpuMemory.IsMapped(va) || !_process.CpuMemory.IsRangeMapped(va, size))
+            {
+                throw new TamperExecutionException($"Unmapped memory access of {size} bytes at 0x{va:X16}");
+            }
+
+            if (!isWrite)
+            {
+                return;
+            }
+
+            // TODO (Caian): It is unknown how PPTC behaves if the tamper modifies memory regions
+            // belonging to code. So for now just prevent code tampering.
+            if ((va >= _process.MemoryManager.CodeRegionStart) && (va + size <= _process.MemoryManager.CodeRegionEnd))
+            {
+                throw new CodeRegionTamperedException($"Writing {size} bytes to address 0x{va:X16} alters code");
+            }
+        }
+
+        public T ReadMemory<T>(ulong va) where T : unmanaged
+        {
+            AssertMemoryRegion<T>(va, false);
+
+            return _process.CpuMemory.Read<T>(va);
+        }
+
+        public void WriteMemory<T>(ulong va, T value) where T : unmanaged
+        {
+            AssertMemoryRegion<T>(va, true);
+            _process.CpuMemory.Write(va, value);
+        }
+
+        public void PauseProcess()
+        {
+            Logger.Warning?.Print(LogClass.TamperMachine, "Process pausing is not supported!");
+        }
+
+        public void ResumeProcess()
+        {
+            Logger.Warning?.Print(LogClass.TamperMachine, "Process resuming is not supported!");
+        }
+    }
+}