Worked on enhancing the reliability of SMC handling for the Mediatek platform within the zephyrproject-rtos/trusted-firmware-a repository. Focused on a critical correctness update by refactoring the smc_handler_t function pointer’s return type from uintptr_t to u_register_t, this change improved type safety and ensured consistency with platform-specific calling conventions. The update reduced ABI-related risks in secure monitor interactions and aligned SMC data and type definitions with established platform standards. Leveraged expertise in embedded systems, firmware development, and system programming, primarily using C, to deliver a targeted bug fix that strengthened maintainability and correctness in secure firmware operations for the platform.