RISC-V Operating System Development (xv6 enhancements)

System Calls: Implemented syscall tracing, sysinfo, and optimizations to reduce syscall latency.

Paging: Added page-table printing utilities and logic to detect accessed pages for memory tracking.

Traps & Exceptions: Wrote trap handlers in RISC-V assembly, implemented backtrace support and alarm/timer handling.

Kernel Threads: Extended the kernel with thread support using a clone() implementation modeled on fork(), created a user-level threading library and lock primitives.

Net Driver: Implemented a functional E1000 network driver enabling packet transmission/reception.

Filesystems: Added support for large files and symbolic links to improve POSIX-like behavior.