mOS

mOS is the hobby operating system which is developed from scratch

Work-in-process features

• Filesystem
• Program loading
• UI (X11)
• Log
• Networking
• Signal
• Terminal
• POSIX compliant
• Port GCC (the GNU Compiler Collection)
• Sound
• Symmetric multiprocessing

🍀 Optional features

• Setup 2-level paging in boot.asm
• Dynamic linker

Get started

$ brew install qemu nasm gdb i386-elf-gcc i386-elf-grub bochs e2fsprogs xorriso
$ cd src && ./create_image.sh && ./build.sh qemu iso

✍🏻 If you get this error hdiutil: attach failed - no mountable file systems, installing might help extFS for MAC

Debuging

in build.sh, adding -s -S right after qemu to switch to debug mode. Currently, I use vscode + native debuge -> click Run -> choose "Attach to QEMU"

Monitoring

tail -f serial.log | while read line ; do echo $line ; done

✍🏻 Using tail in pipe way to color the output (like above) causes a delay -> have to manually saving in ide to get latest changes

References

Tutorials

• http://www.brokenthorn.com/Resources
• http://www.jamesmolloy.co.uk/tutorial_html/
• https://wiki.osdev.org

Ebooks

• Understanding the Linux Kernel, 3rd Edition by Daniel P. Bovet; Marco Cesati