OSDev.org

http://www.codeplex.com/singularity

Now we can see how it actually works...

Hmm... I was wondering if they would ever open source it yesterday. Maybe MS have been reading my thoughts

Anyway, I'll be taking a look over it later today

Singularity seems to be an interesting project. I've been following their progress for several months now. This was mentioned earlier on IRC, but I haven't had time to look at the code yet. Thanks for posting a link, I'd forgotten to bookmark it.

Oooh, I've been waiting for this

Now I've got decent bedtime reading material

Anyone tried to get it up and running?

Or better yet... build it?

I am very excited to dive into the code and take a look around!

-Rich

Looking at the bootloader right now, and so far (from the bootsectors and singldr) it looks pretty awful.
Sounds safe.
Loving the concise constant names.
Nice horizontal rule!

I'm not sure if this is some sort of weird publicity stunt or what, but a lot of it looks really hackish and generally bad.

Edit: I guess they learned C and ASM on the fly or something; the C# parts (the kernel and whatnot) actually look pretty nice. As nice as object-oriented code can look, anyways.

lollynoob wrote:

Code: Select all

else if (startKB + sizeKB >= Struct_Microsoft_Singularity_BootInfo_MAX_VIRTUAL_ADDR / 1024ul) {
      sm[i].size.hi = 0;
      sm[i].size.lo = Struct_Microsoft_Singularity_BootInfo_MAX_VIRTUAL_ADDR - startKB * 1024;

Loving the concise constant names.

My God. 'Struct_Microsoft_Singularity_BootInfo_MAX_VIRTUAL_ADDR'? They're ... kidding .. aren't they?

You never read the leaked source code for Win2k or WinNT, or even any Microsoft code examples? They love ridiculously long and obvious names. Either my ability to tell jokes from seriousness sucks, or they actually considered naming IE8 "IE Desktop Online Web Browser Live Professional Ultimate Edition for the Internet" (source). It certainly sounds Microsoft-ish.

Anyways, I'm back in Windows for the first time since Feb. 24th, so I'll see if I can compile it while I'm here.

I'm betting those long names are required for using C# constructs from C++ or asm. Most likely the C# namespaces get munged into long_names_with_underscores in the symbol table.

@lollynoob: You realize this is a research OS and not a commercial product, right?

I just looked at a hex dump of a C# executable produced by gmcs. There were no long underscored names like that. It's a Microsoft thing.

Anyways, I lost interest in the code. It's not as fancy and clean looking as I imagined, sadly.

Jeremiah Griffin wrote:I just looked at a hex dump of a C# executable produced by gmcs. There were no long underscored names like that. It's a Microsoft thing.

Yes, exactly. Singularity's dialect of C# is compiled with Bartok, which emits native code, not assemblies containing IL as gmcs and friends do.

Anyways, I lost interest in the code. It's not as fancy and clean looking as I imagined, sadly.

In my experience, no kernel code is. It's just a grotty, detail-infested kind of domain to work in. If you want elegance, look at compilers for higher-level languages (written in those same languages) instead.

I haven't dived into the code yet, but I've got it up and running with Virtual PC. The PDF in the source .zip details everything you need to do pretty well, except netbooting with VPC: You need to do That starts up the netboot server program automatically (you need to have done the loopback setup stuff).

If you build everything (the World target), however, it takes eons to start from the netboot server.

Oh and one more thing, WinDbg is evil to work with

Just uploaded some screenshots of it here

Managed to get the webserver "working", it's a bit rusty but it seems to work, you can see it in sing5.jpg. Sorry about the bad quality of the JPGs, all I had was Paint and it likes to save JPGs in crap quality.

Jeremiah Griffin wrote: Anyways, I lost interest in the code. It's not as fancy and clean looking as I imagined, sadly.

FYI, another c# os http://gocosmos.org/

--
PS: i haven't looked at both os c# code.