28extern "C" int cpp_vtable_call(sal_Int32 nFunctionIndex, sal_Int32 nVtableOffset,
void** gpreg,
29 void** fpreg,
void** ovrflw,
30 sal_uInt64* pRegisterReturn );
void cpp_vtable_call(sal_Int32 func, sal_Int32 offset, void **pStack)
is called on incoming vtable calls (called by asm snippets)