OSDev.org

Not 1.0 yet, but what the heck. After what seems like an eternity (4 years), I finally feel my kernel is stable enough and can do enough things to warrant a post here.
Most recently I've been able to port sortie's libz as well as libpng to userspace. I tried to port freetype but that failed, so in the interim I'm using the public domain STB_TrueType.h library.

Some details about [mx]:
- x86_64 only, I might look into other arches eventually
- All the usual mundane kernel stuff: memory management, multitasking yada yada
- FAT32 RO driver using ATA DMA.
- Custom written libc, with the occasional code 'borrowing' from sortix libc (:
- OS-specific toolchain of course, with libstdc++ support

I actually learned a great deal about C/C++ (especially the lower level stuff) through OSDev, so I'm somewhat proud I have reached a decent standard (to warrant a post here) after like 4 years. I remember my first kernel (even though I'd rather not, I deleted all traces of it from everywhere), it was utter rubbish.
As sortie once said:


The git repo is available at https://bitbucket.org/requimrar/mx. It contains a 'bootstrap script' that will fully setup a working environment to build and test the kernel. Simply run it with


Although the disk image part is made for OS X only.
And now, a screenshot:



Thank you!

Hey!
hehe, too many people don't value that.

Couldn't look into the sources in detail yet, is it a microkernel? Where's your drivers & stuff running, how does the userspace startup until it shows that nice freetype message?
I've been osdeving for 4 years now too (with some pause), and started a complete rewrite at the start of this year. So I kinda know what you mean

Nice work, keep it going
Greets, Max

Hello!



Well the original kernel (pre-rewrite) was intended to be a monolithic kernel, then in the middle I kinda thought eh, why not make a microkernel. Thus I started putting in bits of code that would eventually facilitate such a transition.

Since [mx] is just a partial rewrite of the previous kernel (mostly the FS layer), it's not really a microkernel just yet.


The userspace is just loaded from disk, with the FS drivers being part of the kernel. Also it's not freetype, since I couldn't get that to work.




Thanks!