Licensed under the terms of the MIT Licence: see LICENSE file for details.
This is not a true, functional kernel or OS. This is a toy to play with: I was trying to learn something interesting about kernels and how they work and I came up with this; you'll forgive me for being such a newbie... The... thing is currently designed for x86 cpu only, gets started by GRUB (or any other multiboot compliant bootloader), and works in Protected Mode. It's in a very early state of development and, of course, it is absolutely not useful.
GNU gcc 4.7.2-2
Nasm 2.10.01
GNU ld 2.22.90
GNU Make 3.81
Optional:
Qemu 1.2.0
Bochs 2.4.6
make kernel (compile and glue together source files)
make cdrom (create a cdrom bootable image)
make floppy (create a floppy bootable image; will need 'genisoimage')
make run-cdrom (boot and test the cdrom image; will need 'qemu' or 'bochs')
make run-floppy (boot and test the floppy image; will need 'qemu' or 'bochs')
vim common.mk (edit configuration and options; will need 'vim')
* REWRITE kernel code: mmu, multitasking and descr. tables code
* cleanups
* vfs functions & file editing improvements
* improve syscall system
* separate x86 code from C common code
* how to implement a decent stdio?
* think about a good design
* API for underlying filesystems
* mounting, unmounting, mount lists
* caches (vnode, etc.)
* task-related things
* ELF executable & relocatable loading
* process synchronization (mutexes, semaphores)
* priority based scheduling (timeslices?)
* tickless kernel?
* Basic syscalls
* UNIX syscalls
* POSIX syscalls
* driver manager?
* drivers & modules registration
* IRQ registration
* DMA registration
* I/O request layer (independent of VFS)
* I/O request queue
* CD-ROM drive support (ATAPI devices)
* ATA
* Floppy
* Block cache system
* Disk DMA support
* PCI configuration
* PCI bus layer
* TCP/IP stack (Ethernet, ARP, IP, ICMP, UDP, TCP)
* Card drivers
* port binutils, gcc
* port bash shell
* vesa driver, graphical interface
There is no documentation for this project yet.
If you're trying to understand the code or thinking about developing your own OS, you may find very useful documentation/tutorials at OSdev.org.