Worked on the rust-lang/miri repository to introduce minimal support for libc memory protection APIs, specifically focusing on mprotect and madvise. The implementation centered on strict argument validation, ensuring only supported flags such as PROT_READ and PROT_WRITE were accepted, while the actual memory behavior remained unchanged. This approach established a safe baseline for future enhancements by catching incorrect usage early without impacting runtime semantics. The work was carried out using Rust, with an emphasis on memory management and system programming principles. By validating input for these APIs, the groundwork was laid for more robust memory protection features in subsequent updates.