// Patch to retrieve accurate speed values
public void GamePatch()
{
int callCodePtr = MemoryHelper.Allocate(0, 100);
List <byte> callCode = new List <byte>();
// backup registers
callCode.Add(0x50); // push eax
callCode.Add(0x51); // push ecx
callCode.Add(0x52); // push edx
// call the managed function
callCode.Add(0x53); // push ebx
callCode.Add(0x57); // push edi
callCode.Add(0xE8); // call ...
callCode.AddRange(BitConverter.GetBytes(calculateSpeedPtr - (callCodePtr + callCode.Count + 4))); // ... CalculateSpeed
// restore registers
callCode.Add(0x5a); // pop edx
callCode.Add(0x59); // pop ecx
callCode.Add(0x58); // pop eax
// run original code and return
callCode.AddRange(new byte[] { 0x0F, 0x28, 0x87, 0x20, 0x01, 0x00, 0x00 }); // movaps xmm0, [edi + 120]
callCode.Add(0xC3); // ret
MemoryHelper.Write(callCodePtr, callCode.ToArray());
List <byte> jumpCode = new List <byte>();
jumpCode.Add(0xE8); // call ...
jumpCode.AddRange(BitConverter.GetBytes(callCodePtr - 0x4308A2 - 5)); // ... callCodePtr
jumpCode.Add(0x90); // nop
jumpCode.Add(0x90); // nop
MemoryHelper.Write(0x4308A2, jumpCode.ToArray());
}
internal MemoryAllocation(IProcess process, int size,
uint protection, bool mustBeDisposed = true)
: base(process, MemoryHelper.Allocate(process.SafeHandle, size, protection))
{
Size = size;
MusBeDisposed = mustBeDisposed;
IsDisposed = false;
}
/// <summary>
/// Initializes a new instance of the <see cref="AllocatedMemory" /> class.
/// </summary>
/// <param name="processPlus">The reference of the <see cref="IProcess" /> object.</param>
/// <param name="name"></param>
/// <param name="size">The size of the allocated memory.</param>
/// <param name="protection">The protection of the allocated memory.</param>
/// <param name="mustBeDisposed">The allocated memory will be released when the finalizer collects the object.</param>
public AllocatedMemory(IProcess processPlus, string name, int size,
MemoryProtectionFlags protection = MemoryProtectionFlags.ExecuteReadWrite,
bool mustBeDisposed = true)
: base(processPlus, MemoryHelper.Allocate(processPlus.Handle, size, protection))
{
// Set local vars
Identifier = name;
MustBeDisposed = mustBeDisposed;
IsDisposed = false;
Size = size;
}
