hgesser.com/ulix/

The Implementation of the ULIX Literate Operating System

header

Navigation

Privates

Publikationen

Studium

Software

Sonstiges

Blaue Links: intern
Rote Links: extern

Suche Linux-Bücher bei
Amazon.de


Subscribe Hans-Georg Eßer: ULIX

A diary documenting the implementation of ULIX-i386

Welcome to the ULIX blog.

Ulix (Literate Unix) is a Unix-like operating system currently in development at University of Erlangen-Nürnberg. I use D. E. Knuth's concept of Literate Programming for the implementation and documentation. The ultimate goal is a fully working system which can be used in operating system courses to show students how OS concepts (such as paging and scheduling) can be implemented. Literate programs are very accessible because they can be read like a book; the order of presentation is not enforced by program logic or compiler restrictions, but instead is guided by the implementer's creative process.

Ulix is written in C and assembler for the Intel architecture. Currently no source code is available because the project is in its early stages.

On this page I document my progress with the implementation.


Navigation: 2012 | 2011 |


Working on the GDT trick (11.08.2011)


In order to make the kernel use (virtual) high memory addresses (0xC000.0000 to 0xFFFF.FFFF), some extra work is necessary. I am porting the GDT trick over to the current code which uses a special GDT that linearly remaps memory by supplying a relocation offset as part of a segment description.

Resources used:
Higher Half With GDT, http://wiki.osdev.org/Higher_Half_With_GDT

[ Path: | persistent link ]

Copyright © 2011 Hans-Georg Eßer; Server: Debian Linux, Apache Web Server, blog page powered by blosxom :: the zen of blogging, Theme: Hazard Area 1.6 (modified), created by Bryan Bell, Copyright © 2000-2006 Weblogger.com.