Srinath Parvathaneni developed Guarded Control Stack (GCS) support for the AArch64 linker in the espressif/binutils-gdb repository, focusing on enhancing visibility and control over GCS behavior in embedded systems. He implemented the GCS feature bit, integrated readelf support to display GCS properties, and introduced new linker options to manage GCS behavior and reporting. His work included a robustness fix to ensure accurate handling and reporting of GCS feature markings during the linking process. Using C and leveraging expertise in aarch64 and compiler toolchains, Srinath delivered a well-scoped, technically deep feature that improves security and transparency in the build process.