⚙️ Operating Systems26 min
Linux Kernel Driver Development: From Hello World to PCIe Drivers
A
Muhammad Asim Chattha
Software Developer & Cybersecurity Researcher
#Linux Kernel#Drivers#PCIe#DMA#Kernel Debugging
Writing Linux kernel drivers is the gateway to understanding how hardware and software interact at the lowest level.
Learning Path
- **Hello World Module**: Building, loading, and debugging your first kernel module
- **Character Device Drivers**: Implementing open/read/write/ioctl operations with proper synchronization
- **PCIe Driver Development**: Enumerating PCI devices, mapping BARs, and handling MSI-X interrupts
- **DMA Engine**: Setting up scatter-gather DMA transfers with the kernel's DMA API
- **Kernel Debugging**: KGDB, ftrace, perf events, and dynamic debugging with dyndbg
- **Testing**: KUnit for kernel unit tests and QEMU-based hardware emulation