1 files changed, 68 insertions, 0 deletions
diff --git a/src/Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs b/src/Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs
new file mode 100644
index 00000000..be51264a
--- /dev/null
+++ b/src/Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs
@@ -0,0 +1,68 @@
+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 bool TamperedCodeMemory { get; set; } = false;
+
+        public TamperedKProcess(KProcess process)
+        {
+            _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): The JIT does not support invalidating a code region so writing to code memory may not work
+            // as intended, so taint the operation to issue a warning later.
+            if (isWrite && (va >= _process.MemoryManager.CodeRegionStart) && (va + size <= _process.MemoryManager.CodeRegionEnd))
+            {
+                TamperedCodeMemory = true;
+            }
+        }
+
+        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!");
+        }
+    }
+}
+\ No newline at end of file