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L3.7 — Unsafe Rust and FFI for low-level code

Date: 2025-10-04

Author: Community Contributor (placeholder)

Estimated time

45–60 minutes

Objectives

Explain when unsafe is required and how to minimize unsafe blocks.
Show common FFI patterns when interfacing Rust with C (useful in kernel or driver bindings).
Provide safety-checklist for reviewing unsafe code.

Content

Primitives of unsafe: dereferencing raw pointers, calling unsafe functions, accessing mutable statics.
Examples of wrapping unsafe code in safe abstractions.
Using bindgen and cc crate for FFI integration.

Exercises

Convert a small piece of unsafe code into a safe wrapper.
Use bindgen to generate Rust bindings for a simple C header.

Contributor notes

Placeholder — expand with code examples and references.