mit-pdos/xv6-riscv

Features

• Monolithic Kernels - Implements a monolithic kernel architecture where all core OS services run in a single privileged binary.
• RISC-V Kernel Implementations - Implements a low-level RISC-V kernel providing essential process and memory management.
• Filesystem Implementations - Provides a simplified file system implementation for studying on-disk data organization.
• Teaching Operating Systems - Provides a simplified Unix-like kernel specifically designed for studying operating system concepts.
• Operating Systems Study - Serves as an educational resource for studying the fundamentals of operating system design.
• File System Architectures - Implements a custom file system architecture using fixed-size blocks and inodes for data organization.
• Kernel Development - Offers a complete workflow for building and testing a RISC-V kernel from source.
• Operating System Kernels - Implements a minimal kernel designed for educational study of hardware and process management.
• Trap-Based Interfaces - Provides a system call interface based on hardware traps for transitioning from user mode to kernel mode.
• Memory Protection Managers - Provides hardware-enforced memory protection using page tables to isolate user processes from the kernel.
• Emulator Target Images - Provides a bootable RISC-V system image specifically designed for execution in virtual machines.
• System Emulators - Provides a target for system emulators to analyze the interaction between RISC-V hardware and the kernel.
• Virtual Machines - Designed to be executed within RISC-V virtual machines and emulators.
• Kernel Synchronization Primitives - Utilizes spinlocks as low-level synchronization primitives to manage shared data across multiple CPU cores.
• Kernel - Implements core kernel functions for multiprocessor resource handling and process scheduling.
• Kernel Build Systems - Ships a build system for compiling the kernel source into a bootable binary image.
• Shell Command Execution - Includes a shell capable of launching programs and managing process lifecycles.
• Disk Image File System Management - Includes tooling for generating bootable disk images containing the formatted file system.
• Bootable Image Creation - Provides utilities to create and format disk images for the operating system.
• Slab Allocators - Implements slab-style memory allocation using fixed-size chunks to prevent fragmentation within the kernel.
• System Resource Management - Implements functions for managing system resources across multiprocessor hardware.
• Remote Debugging Protocols - Supports remote kernel debugging via protocols that allow memory inspection and breakpoint management.
• User-Space Toolchains - Provides a toolchain to compile user-space programs linked against specific kernel memory layouts.

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