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Debugging Information in Linker
Nikl, Vojtěch ; Křoustek, Jakub (referee) ; Masařík, Karel (advisor)
This thesis describes the conversion between the CCOFF object file format and the ELF file format. We start with a general object file format and its debbuging information, then we focus closely on the ELF, CCOFF and DWARF debugging information. The functionality of the CCOFF format is encapsulated in the ObjectFile class library. Then follows the description of creating an ELF object file, its filling with the proper data and its conversion back to the CCOFF format.
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Digital Steganography for Executables
Tobiáš, Pavel ; Bidlo, Michal (referee) ; Strnadel, Josef (advisor)
This bachelor's thesis concerns itself with steganographic concealment of arbitrary data in executable files . Initially it speaks in general terms , mainly about injection - and substitution - based steganographic methods for various types of cover - objects . Afterwards , the focus is on executable files in the ELF format and the x86 ISA family ; permutation - based methods for instructions and basic block chains are mentioned and the substitution - based method of instruction equivalence classes is examined . Consequently , the design, implementation , testing and optimization of a custom solution based on the last mentioned method are described . Finally , the methods and outcomes of experimenting with the custom solution are described .
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Tools for Executable File Format Conversions
Matula, Peter ; Husár, Adam (referee) ; Hruška, Tomáš (advisor)
This paper describes methods and procedures used for object file format conversions. It introduces several commonly used formats (ELF, PE, E32Image, DEX) and project Lissom's object file format (LOFF). It contains basic information about libraries manipulating these formats and a description of a new library managing E32Image. The primary objective is to implement a program converting files between common formats and LOFF. This problem is solved by mapping all critical information from one format structures to another. To accomplish this task, it was necessary to modify and extend some features of Lissom object format. The result is the plugin based application capable of creating valid and runnable executable files in mentioned formats.
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Graphical Viewer and Simple Editor of ELF File
Omacht, Martin ; Martiško, Jakub (referee) ; Křivka, Zbyněk (advisor)
The goal of this thesis is to create an application with graphical user interface that provides graphical overview of internal structure for binary files in ELF format while also allowing simple editing. The application handles corrupted files and supports Windows and Linux operating systems. It is implemented in C++ with graphical interface created using Qt library. To picture the internal structure of the given ELF file, a custom diagram was designed and implemented.
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Generation of Object Files for RISC-V
Benna, Filip ; Zachariášová, Marcela (referee) ; Hruška, Tomáš (advisor)
This master’s thesis deals with the topic of program source code compilation for RISC-V processor architecture. The generated object files need to be compatible with GNU binutils open source tools which are already available for the architecture. The focus is on relocations which must be correctly detected in Codasip Studio tools and transformed into RISC-V platform specific relocation types.
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Graphical Viewer and Simple Editor of ELF File
Veškrna, Tomáš ; Martiško, Jakub (referee) ; Křivka, Zbyněk (advisor)
This thesis specify, design and develop graphial viewer and editor of ELF binary files. The goal of this thesis is to provide easier manipulation with ELF files, although they were corrupted by wrong editing. The final software must be multiplatform, so Qt library is used for the implementation of its graphical user interface. For manipulation with ELF files is uses elf.h library. The application is implemented in C++. The realized tool can be used on both Linux operation system and Microsoft Windows.
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Library for Efficient Video Capture in 3D Application
Pospíšil, Petr ; Navrátil, Jan (referee) ; Havel, Jiří (advisor)
This thesis deals with library for recording video in the background of 3D application. A library is designed to work under the Microsoft Windows and Linux operation systems. It records image and also sound. Image recording is supported in OpenGL, Direct3D9, Direct3D10 and Direct3D11. To reduce video data size, library supports image compression using MJPG codec. Audio is recorded by WaveForm audio, Windows Core Audio or ALSA. Recorded sound is for whole operation system. A library is able to record up to two audio streams to accommodate possible microphone input. It can mix audio data together if needed. Output data are then written into AVI file. It is possible to write own text information as overlay that is rendered as part of application screen output.
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Improving Extraction of Information From Executable Files
Hájek, Karel ; Kolář, Dušan (referee) ; Zobal, Lukáš (advisor)
This thesis deals with extension of an open-source decompiler project called RetDec maintained by the Avast company. The goal is to develop an extension of data extraction from executable files for malware analysis improvement. The thesis proposes several possible improvements on data extraction in the RetDec project. The most useful of these suggested enhancements are then selected and implemented. The selected enhancements involve calculating a hash of symbol names in Linux executable files and a more extensive analysis of Authenticode format, a Microsoft technology for digital signing of executable files for Windows operating systems. The thesis implements the selected additional data extractions in the RetDec project and tests them on real-world malware samples.
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Low-level measurement of ELF magnetic fields
Cích, Augustín ; Hanzelka, Michael (referee) ; Fiala, Pavel (advisor)
This Master's thesis deals with design of sensor network for synchronised low-level recording of changes in magnetic part of Earth's field in ELF band in multiple places. The goal is acquisition of changes due to solar storm activity, while taking into account, that in research of geomagnetic effects connected with solar events is spectrum of interest broader and reach up to VLF, where a solution is often made of combination of receivers in ELF and VLF, a decision was made, after consulting with thesis supervisor and researchers, that device will be designed for ELF, but can be easily modified, by changing preamplifier, for using in higher frequency bands, creating a solid founding for further measurements and research in this field.
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Strategien im Umgang mit Mehrsprachigkeit in virtueller Projektkommunikation - eine Fallstudie
KRÄMER, Hannah Theresa
With help of methodological and data triangulation, the online written and oral communication of a virtual project team was investigated in order to answer the question of which strategies the team members develop in multilingual interaction via different media. Light is shed on the use of ELF as a genuinely multilingual practice. The central role of pronounced multilingual competence of the project leaders, as well as the advantages of communication in the mother tongue for building a familiar relationship become evident. The communication in the team presents itself as open to language changes, which allows creativity and joy in the use of language.
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