paging

A page table written in C, based on the week 4 and week 5 labs from the Languages and Low-Level Programming Course(LLP). This lab was also implemented in LC, which can be found here.

I originally worked on the LLP labs in https://github.com/dvaneson/baremetal. I have moved the page table code to this repository to make it easier to reference and compare the C implementation with the LC version.

Installation Notes:

• We typically run these programs in a virtual machine that is running Ubuntu 18.04 LTS with the following packages installed:

    gcc make perl linux-headers-$(uname -r) \
    build-essential dkms clang llvm qemu xorriso libc6-x32 \
    parted default-jdk git ant gcc-multilib g++-multilib
  

  You can find a detailed set of instructions for building a virtual machine that is suitable for running these programs by clicking here. This information may also be useful if you are trying to configure a machine with a different version of Linux for the purpose of running these programs.

• We recommend using the provided Makefiles to compile and run these programs. For example, you can build this program using:

    make
  

  You can replace make with make run in either of the examples above to build and also run the program inside QEMU, or you can use make clean to remove temporary files that are generated during the build process.

libs

This program depends on libraries and tools that are packaged together in the libs folder. The libraries include:

• mimg - Memory image boot tools, providing an extra layer of flexibility and control over Grub. The mimgmake tool allows a developer to combine the contents of multiple executable or other files in a single image, including details of the addresses where the files should be loaded. The mimgload tool uses the resulting image files to ensure that memory is appropriately initialized at boot-time before handing control to the appropriate kernel code.

• simpleio - A library for simple I/O, including output to the screen (via video RAM) or a serial port, and input from the keyboard.

• userio - Variant of the simpleio library for users that makes a system call to the kernel for printing a char rather than trying to output itself.

• winio - Variant of the simpleio library that supports multiple output windows within a single program.