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IEEE 802.11 wireless networking for HelenOS
Kolárik, Jan ; Děcký, Martin (advisor) ; Mareš, Martin (referee)
IEEE 802.11 (a.k.a. WiFi) is a popular wireless LAN specification. This thesis documents implementation of this standard within the experimental operating system HelenOS which differs from conventional operating systems with its microkernel-based design. First, the basic concepts of WiFi technology are described. Description of external tools used during development is following. Together with that, the chosen method of integrating the wireless framework into existing system is depicted. In the next chapter we analyse the implementation details of the work. There is thoroughly explained the structure of the driver for selected WiFi device and also the functionality of resulting IEEE 802.11 library. In the end of the thesis there is an evaluation of the features of final work and comparison of enclosed implementation with existing solutions.
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Port of QEMU to HelenOS
Mareš, Jan ; Děcký, Martin (advisor) ; Škoda, Dominik (referee)
QEMU is a machine emulator that is able to emulate environment of various hardware platforms, including PC, PowerPC, ARM and SPARC. The goal of this master thesis is to port QEMU to HelenOS, thus allowing developers run the emulation of HelenOS inside HelenOS. The thesis contains a detailed analysis of the possible porting approaches (including the port of prerequisite libraries or their replacements) and an analysis of the features of QEMU (a reasonable subset of all features of QEMU) that are essential for achieving the goal and features that can be omitted in the prototype implementation. The primary focus of the implementation is to support the PC (x86 and x86-64) guest environment. Although not part of the prototype implementation, the thesis also focuses on analyzing the requirements for running QEMU as a virtualization hypervisor in HelenOS. Powered by TCPDF (www.tcpdf.org)
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IPv6 for HelenOS
Steinhauser, Antonín
This thesis extends HelenOS operating system in order to be IPv6 capa- ble. New IPv6 protocol implementation is on the same level as previous IPv4 protocol implementation. HelenOS networking stack now offers three modes of networking: IPv4-only, IPv6-only and dual stack mode. Dual stack mode enables usage of both protocols at once. The thesis describes previous state of HelenOS networking stack, analyzes differences between IPv4 and IPv6 protocols and gives reasons for single strategic decisions. In fine, it describes used implementation and debugging techniques, concludes results and compares HelenOS with other microkernel operating system from the IPv6-capability perspective. 1
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System daemon for HelenOS
Koutný, Michal ; Děcký, Martin (advisor) ; Yaghob, Jakub (referee)
HelenOS is an operating system based on a number of cooperating server processes, however it is missing unified means to control and monitor them. The thesis first surveys approaches taken by both popular and microkernel operating systems to the service management. Further it gives a detailed overview of relevant HelenOS environment and continues by the analysis of particular service management issues. The presented knowledge is then applied to HelenOS and the implementation based on the systemd terminology is described. Finally, the thesis shortly assesses the implementation and outlines further ideas that the implementation enabled. Powered by TCPDF (www.tcpdf.org)
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HelenOS VFS-FUSE connector
Bouška, Zdeněk ; Děcký, Martin (advisor) ; Tůma, Petr (referee)
This master thesis deals with the implementation of a connector between FUSE file system drivers and HelenOS native VFS interface. The thesis first describes the way of finding the best solution and the potential possibilities. The low level layer solution is described as the best one. Further the thesis describes the real implementation of the connector. As the implementation of the connector was successful the thesis then describes in detail the parts of the fully functional solution in real-life HelenOS system. With this solution in place almost no changes are necessary to be done neither in FUSE nor in Helenos VFS. The connector implementation is demonstrated on two real-life FUSE file systems exFAT and NTFS which were ported to HelenOS. Powered by TCPDF (www.tcpdf.org)
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HelenOS VFS-FUSE connector
Bouška, Zdeněk ; Děcký, Martin (advisor) ; Kofroň, Jan (referee)
This master thesis deals with the implementation of a connector between FUSE file system drivers and HelenOS native VFS interface. The thesis first describes the way of finding the best solution and the potential possibilities. The low level layer solution is described as the best one. Further the thesis describes the real implementation of the connector. As the implementation of the connector was successful the thesis then describes in detail the parts of the fully functional solution in real-life HelenOS system. With this solution in place almost no changes are necessary to be done neither in FUSE nor in Helenos VFS. The connector implementation is demonstrated on a real-life FUSE file system exFAT ported to HelenOS. Powered by TCPDF (www.tcpdf.org)
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HelenOS sound subsystem
Veselý, Ján ; Děcký, Martin (advisor) ; Libič, Peter (referee)
The work examines options for a modern daemon centered audio stack for HelenOS. It studies four different audio architectures; ALSA, OSS, JACK, and PulseAUdio. Each of them implements different approaches to providing general purpose audio support. Champion of every approach is analyzed, its strengths and weaknesses assessed. Based on the results of the analysis, different approaches for HelenOS audio stack are examined and the most promising one implemented. Complete audio stack is implemented, including an audio device driver, and a demonstrator audio application. Direction of future work and improvements is discussed at the end.
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IPv6 for HelenOS
Steinhauser, Antonín ; Děcký, Martin (advisor) ; Tůma, Petr (referee)
This thesis extends HelenOS operating system in order to be IPv6 capa- ble. New IPv6 protocol implementation is on the same level as previous IPv4 protocol implementation. HelenOS networking stack now offers three modes of networking: IPv4-only, IPv6-only and dual stack mode. Dual stack mode enables usage of both protocols at once. The thesis describes previous state of HelenOS networking stack, analyzes differences between IPv4 and IPv6 protocols and gives reasons for single strategic decisions. In fine, it describes used implementation and debugging techniques, concludes results and compares HelenOS with other microkernel operating system from the IPv6-capability perspective. 1
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HelenOS installer
Táborský, Dominik ; Děcký, Martin (advisor) ; Yaghob, Jakub (referee)
The capability to install itself on a permanent storage is one of the things that define usability of an operating system. In this thesis we look at our possi- bilities of achieving that within the HelenOS operating system. We discuss what options there are, what are their advantages and disadvantages and finally their implementation details. Prototype implementation has been written of those cri- tical parts, which is also described. Implementation design decisions and their pros and cons are discussed as well. 1
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Graphics Stack for HelenOS
Koupý, Petr ; Děcký, Martin (advisor) ; Marek, Lukáš (referee)
Title: Graphics Stack for HelenOS Author: Petr Koupý Department / Institute: Department of Distributed and Dependable Systems Supervisor of the master thesis: Mgr. Martin Děcký Abstract: HelenOS is an experimental operating system based on a micro-kernel multi-server architecture. Before the inception of this thesis, HelenOS already contained numerous mod- ernly designed subsystems responsible for various system tasks. However, it lacked the proper subsystem for interaction with the user. While the input part of such subsystem was already in an advanced stage of development, the output part was just a quick and temporary solution in order to have at least some mean to populate the screen with information. This thesis deals with the creation of a proper graphics subsystem that would replace the temporary one. The resulting new HelenOS graphics subsystem is designed according to the state-of-the-art prin- ciples found within the problem domain. Although minimalistic, the initial implementation is highly extensible and already practically usable by the HelenOS developer community. The thesis covers all important parts of the graphics subsystem - graphic driver infrastructure, drawing library, graphics server and a toolkit for creation of application user interface. Keywords: graphics subsystem, graphical user...
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