PanicOS

A simple operating system for 32-bits x86 PCs.

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

Dynamic linking
C++ global constructor and destructor
C Standard Library
C++ Standard Library including STL
C++ object-oriented GUI widget toolkit
POSIX emulation library
Window manager
Graphical desktop envoironment
Various user space programs

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