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COM 341, Operating Systems

Project #2

Compiling a Linux Kernel

Required Tools

Ensure that you have the Bash shell with common Unix utilities (GNU coreutils or any alternatives), and the Git version control system installed on your system together with an SSH client.

  • On Windows, you can get the official Git distribution with everything you need in one package.

  • On macOS, you can get Git by installing Xcode or the Command Line Tools package from Apple.

  • On Ubuntu Linux, you can install Git through the system's package manager with the command sudo apt install git.

macOS and Ubuntu Linux have Bash and basic Unix programs installed by default.

Part #1

The goal of the first part is to modify an old version of the Linux kernel bundled with the Ubuntu 16.10 GNU/Linux distribution by adding two custom system calls to it. This will allow a small task information utility to query information about running processes directly without consulting the proc filesystem procfs. Follow all the steps in the Readme file under the ubuntu-yakkety directory to finish the task.

What to Submit

  1. Ensure that during the compilation process you have specified your last name and the first letter of the first name in the ...debian.master/changelog file in the correct form (all letters are in lowercase, no _ or - characters between your last name and the first letter of the first name).

  2. In your private course repository that was given to you by the instructor during the lecture, create the path project-2/part-1/.

  3. In your private course repository, create a directory project-2/part-1. Put the following files into it from the Linux source tree (NOT from the kernel-project directory)

    • task_info/
    • init/Kconfig
    • include/linux/syscalls.h
    • include/uapi/asm-generic/unistd.h
    • arch/x86/entry/syscalls/syscall_32.tbl
    • arch/x86/entry/syscalls/syscall_64.tbl
    • kernel/sys_ni.c
    • Makefile
    • debian.master/changelog

Create a results.txt file from the home directory (~/) of your virtual machine.

sha512sum *.deb > results.txt

Put the results.txt file into the project-2/part-1 directory of your private repository with all the other files.

  1. Commit and push your repository through Git. Submit the last commit ID to Canvas before the deadline.

Part #2

The goal of the second task is to port the task_info system calls' code from the previous part to the new version of the Linux kernel bundled together with the Ubuntu 20.04 LTS distribution. Follow all the steps in the Readme file under the ubuntu-focal directory to finish the task.

What to Submit

  1. Ensure that during the compilation process you have specified your last name and the first letter of the first name in the ...debian.master/changelog file in the correct form (all letters are in lowercase, no _ or - characters between your last name and the first letter of the first name).

  2. In your private course repository that was given to you by the instructor during the lecture, create the path project-2/part-2/.

  3. In your private course repository, create a directory project-2/part-2. Put the following files into it from the Linux source tree (NOT from the kernel-project directory)

    • task_info/
    • init/Kconfig
    • include/linux/syscalls.h
    • include/uapi/asm-generic/unistd.h
    • arch/x86/entry/syscalls/syscall_32.tbl
    • arch/x86/entry/syscalls/syscall_64.tbl
    • kernel/sys_ni.c
    • Makefile
    • debian.master/changelog

Create a results.txt file from the home directory (~/) of your virtual machine.

sha512sum *.deb > results.txt

Put the results.txt file into the project-2/part-2 directory of your private repository with all the other files.

  1. Commit and push your repository through Git. Submit the last commit ID to Canvas before the deadline.

Deadline

Check Canvas for information about the deadlines.