GNU based system software toolchain

The implementation of a comprehensive toolchain, which replicates the functionalities of the GNU toolchain tools and will be used to convert an assembly (.s) file into executable machine code.

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Table of Contents

• Description
• How To Use
• References
• License
• Author Info

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Description

This project is concerned with implementing a complete toolchain for translating an assembly (.s) file into executable machine code, modeled after the GNU toolchain tools.

Technologies

• Flex [Flex is utilized as part of the lexing process]
• Bison [Bison is employed in the parsing phase]
• The C++ Standard Template Library (STL) [It is used in conjunction with C++ to facilitate the implementation of data structures and operations performed on them]
• Make [Make is used to automate the building and compilation of project by specifying dependencies and the steps required to build the project]

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How To Use

Installation

The tool chain was designed and implemented to be used on the Linux operating system, and therefore uses the make tool to link all files. (If you want to use this tool from the Windows operating system, you need to use a tool that will allow you to run Make inside the Windows operating system, such as Cygwin)

You can find more about the Make tool and its use, as well as the documentation on the website:

    https://www.gnu.org/software/make/

In addition to the Make tool, Flex and Bison tools were also used in this project. Flex was used as a lexeme generator, while Bison was used for parsing. You can find more about these tools, as well as their documentation for use, at the following link:

    https://github.com/westes/flex

    https://www.gnu.org/software/bison/manual/

API Reference

Using the make tool we can run several commands:

    make all (or just make)

Using the make command of the Make tool, the script will be started automatically for the file named makefile in the current directory, ie our makefile file. Its role is to start flex and bison and create a parser and lexer to which the .s assembler file we want to assemble will be passed later.

    clean_assembly

clean_assembly command will only delete all auxiliary files that were created during assembly creation (auxiliary files used when creating lexer and parser)

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References

Make:

    https://www.gnu.org/software/make/

Flex:

    https://github.com/westes/flex

Bison:

    https://www.gnu.org/software/bison/manual/

GNU assembly documentation (used for inspiration)

    https://sourceware.org/binutils/docs/as/

GNU linker documentation (used for inspiration)

    https://ftp.gnu.org/old-gnu/Manuals/ld-2.9.1/html_mono/ld.html

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License

MIT License

Copyright (c) [2023] [zarkobabic]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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Author Info

Žarko Babić

[Student at School of Electrical engineering at University of Belgrade]

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