Worked on the google/swiftshader repository to enhance security for ARM architectures by implementing conditional enablement of Control Flow Integrity using BTI and PAC-RET. Leveraging expertise in ARM architecture and build system configuration, introduced a build configuration that activates BTI+PAC protection when the arm_control_flow_integrity setting is specified as 'bti+pac', ensuring safer code flow on relevant ARM targets while maintaining existing defaults elsewhere. The approach aligned with Chromium’s security standards and prepared the codebase for future Guarded Control Stack integration. All changes were made using GN build language, focusing on minimal build impact and establishing a foundation for further ARM security hardening.