-int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * dest);
-int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * dest);
-int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, char * src);
+int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, uchar_t * dest);
+int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * dest);
+int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * src);
// TODO int write_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * src);