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PanicOS

A simple operating system for 32-bits x86 PCs.

PanicOS

Features

Kernel

  • 32-bits x86 support
  • Legacy BIOS and UEFI booting with GRUB2
  • SMP
  • PAE paging (see pae branch)
  • ELF file loading
  • Loadable kernel modules
  • Parallel ATA IDE Controller and Disk driver
  • QEMU Bochs display driver
  • PCI Bus support
  • PCI Express ECAM support
  • PCI MSI and MSI-X interrupt support
  • PS/2 keyboard and mose driver
  • USB Bus support
  • USB Hub driver
  • UHCI USB controller driver
  • VirtIO block device and GPU device driver
  • PC platform RTC and UART driver
  • Virtual filesystem
  • FAT32 filesystem support
  • Master Boot Record partition table support
  • Hardware abstraction layer abstracts block device, display device and HID device
  • Reboot and shutdown

User Space

Build Instructions

A build of gcc and binutils with i686-elf target triplet is required. dosfstools and mtools are also required for creating disk image. QEMU with target i686 or x86-64 is required for emulation

Run make to create disk image and kernel image, run make qemu to start qemu emulation.

Directory Structure

  • /boot Disk image boot sector
  • /ext Utility for building out-of-tree kernel modules
  • /kernel Operating System Kernel
  • /kernel/arch/x86 x86 architecture specific code
  • /kernel/common kernel common used code
  • /kernel/core Kernel core
  • /kernel/drivers Kernel built-in device drivers
  • /kernel/filesystem Kernel build-in filesystem drivers
  • /kernel/hal Kernel hardware abstraction layer
  • /kernel/proc Kernel process management
  • /library User space libraries
  • /library/crt C Runtime (crt0 and crt1)
  • /library/ld Dynamic linker
  • /library/libc C Standard Library
  • /library/libcpp C++ Standard Library
  • /library/libcpu CPU abstraction library
  • /library/libgui C++ GUI widget toolkit library
  • /library/libposix POSIX emulation library
  • /library/libsys System call library
  • /library/libwm Window manager library
  • /module/edu QEMU EDU device driver
  • /module/hello Hello World kernel module example
  • /module/modlib Kernel module support library
  • /module/virtgpu VirtIO GPU driver
  • /programs/about Graphical About program
  • /programs/cat A program to display context of a text file
  • /programs/date A command line utility to display date and time
  • /programs/desktop Graphical desktop environment
  • /programs/devmgr Device manager
  • /programs/dir A program to list files in a directory
  • /programs/init Init program
  • /programs/kmod A tool to load kernel modules
  • /programs/lscpu An utility to display CPU infomation
  • /programs/lspci An utility to list PCI (Express) devices
  • /programs/mkdir A program for creating directories
  • /programs/reboot A program to reboot computer
  • /programs/rm A program to delete files
  • /programs/sh Shell
  • /programs/shutdown A program to shut down computer
  • /programs/termemu Graphical terminal emulator
  • /programs/wm Graphical window manager
  • /share Non-code data
  • /tools Tools used in the compiling process