Xv6

Last updated
xv6
Xv6 LS Command Output.png
xv6 startup, and using the " ls " command
Developer MIT
Written in C and assembly
OS family Unix-like
Source model Open source
Latest release
RISC-V:rev4 / August 31, 2024;3 months ago (2024-08-31)
x86 (EOL):rev11 / September 2, 2018;6 years ago (2018-09-02)
Available in English
Platforms multiprocessor Intel x86 and RISC-V
Kernel type Monolithic
Default
user interface
Command-line interface
License MIT license
Official website pdos.csail.mit.edu/6.828/xv6

xv6 is a modern reimplementation of Sixth Edition Unix in ANSI C for multiprocessor x86 and RISC-V systems. It was created for educational purposes in MIT's Operating System Engineering course in 2006. [1]

Contents

Purpose

MIT's Operating System Engineering course formerly used the original V6 source code. xv6 was created as a modern replacement, because PDP-11 machines are not widely available and the original operating system was written in archaic pre-ANSI C. Unlike Linux or BSD, xv6 is simple enough to cover in a semester, yet still contains the important concepts and organization of Unix. [1]

Self-documentation

One feature of the Makefile for xv6 is the option to produce a PDF of the entire source code listing in a readable format. The entire printout is only 99 pages, including cross references. [2] This is reminiscent of the original V6 source code, which was published in a similar form in Lions' Commentary on UNIX 6th Edition, with Source Code.

Educational use

xv6 has been used in operating systems courses at many universities, including:

See also

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RISC-V:

x86 (unmaintained):