rem: *faultHandler = (addr)&&error;
add: *fault_handler = (addr)&&error;
context: arch_cpu_user_strcpy(char *to, const char *from, addr *faultHandler){	*faultHandler = (addr)&&error;	while ((*to++ = *from++) != '\0')		;	*faultHandler = 0;	return 0;error:	*faultHandler = 0;	return B_BAD_ADDRESS;}