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Update TamperMachine and disable write-to-code prevention (#2506)

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* Enable write to memory and improve logging

* Update tamper machine opcodes and improve reporting

* Add Else support

* Add missing private statement
This commit is contained in:
Caian Benedicto
2021-08-04 17:05:17 -03:00
committed by GitHub
parent a27986c311
commit ff8849671a
15 changed files with 156 additions and 66 deletions
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12
Ryujinx.HLE/HOS/Tamper/TamperedKProcess.cs
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@ -11,9 +11,11 @@ namespace Ryujinx.HLE.HOS.Tamper
public ProcessState State => _process.State;
public bool TamperedCodeMemory { get; set; } = false;
public TamperedKProcess(KProcess process)
{
this._process = process;
_process = process;
}
private void AssertMemoryRegion<T>(ulong va, bool isWrite) where T : unmanaged
@ -32,11 +34,11 @@ namespace Ryujinx.HLE.HOS.Tamper
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))
// 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))
{
throw new CodeRegionTamperedException($"Writing {size} bytes to address 0x{va:X16} alters code");
TamperedCodeMemory = true;
}
}