コード例 #1
0
        public TrampolineDetour(IntPtr pointer, uint size, Mapper <T> mapDetour)
        {
            _pointer = pointer;
            _size    = size;
            var trampolineSize = _size + JmpSize;

            _trampoline = Kernel32.VirtualAlloc(IntPtr.Zero, trampolineSize, Commit | Reserve, ExecuteRead);

            using (_trampoline.Protect(trampolineSize, ReadWrite))
            {
                Kernel32.CopyMemory(_trampoline, _pointer, _size);

                _trampoline
                .Offset((int)_size)
                .AppendJmp2(_pointer.Offset((int)_size));
            }

            var original = _trampoline.ToDelegate <T>();
            var detour   = mapDetour(original);

            _handle = GCHandle.Alloc(detour, GCHandleType.Normal);
            var detourPointer = detour.ToIntPtr();

            using (_pointer.Protect(_size, ReadWrite))
            {
                _pointer
                .AppendJmp2(detourPointer)
                .AppendNop((int)_size - JmpSize);
            }
        }