Vehicular control system with automatic stack clearing of stack frame

A vehicular control system, the vehicular control system comprising:

• an electronic control unit (ECU) disposed at a vehicle equipped with the vehicular control system, the ECU comprising electronic circuitry and associated software;
• wherein the ECU comprises (i) a next stack activation size hardware register configured to store a stack size value and (ii) a hardware memory initializer configured to initialize memory;
• wherein the ECU determines a maximum stack size of a vehicle control function called by a root function of software associated with the electronic circuitry of the ECU based on compilation of the vehicle control function, and wherein the vehicle control function controls a system of the equipped vehicle;
• wherein the next stack activation size hardware register stores a value equivalent to the determined maximum stack size of the vehicle control function;
• wherein the ECU, prior to executing the vehicle control function, and while executing the root function, triggers execution of the hardware memory initializer;
• wherein the hardware memory initializer, responsive to being triggered by the ECU, initializes an amount of memory equivalent to the value stored in the stack activation size hardware register in parallel with execution of the root function;
• and
• wherein the ECU executes the vehicle control function responsive to receiving an indication of completion from the hardware memory initializer indicating the memory initialization is complete.

A vehicular control system, the vehicular control system comprising:

• an electronic control unit (ECU) disposed at a vehicle equipped with the vehicular control system, the ECU comprising electronic circuitry and associated software;
• wherein the ECU comprises (i) a next stack activation size hardware register configured to store a stack size value and (ii) a hardware memory initializer configured to initialize memory;
• wherein the ECU determines a maximum stack size of a vehicle control function called by a root function of software associated with the electronic circuitry of the ECU, and wherein the vehicle control function controls a system of the equipped vehicle;
• wherein the next stack activation size hardware register stores a value equivalent to the determined maximum stack size of the vehicle control function;
• wherein the ECU, prior to executing the vehicle control function, and while executing the root function, triggers execution of the hardware memory initializer;
• wherein the hardware memory initializer, responsive to being triggered by the ECU, initializes each memory location in a range of memory location to the same value in parallel with execution of the root function, and wherein the range of memory locations is based on the next stack activation size hardware register;
• and
• wherein the ECU executes the vehicle control function responsive to receiving an indication of completion from the hardware memory initializer indicating the memory initialization is complete.