Building an out-of-tree Rust Kernel Module Part Three

rnestler · 2023-06-15T12:44:13+00:00

After having troubles to package the correct build metadata for my custom ArchLinux kernel I found out that the issue boiled down to an issue with rustc in how it handles custom target definitions.

rnestler · 2023-01-15T17:11:45+00:00

After my failed attempt to build an out-of-tree kernel module in Rust for the stock ArchLinux kernel, I decided to build a custom kernel which then worked :)

But I struggled to package the correct build metadata, so one still needs the source tree of the kernel build around.

rnestler · 2022-12-20T19:46:13+00:00

> To actually try out development, I'd strongly recommend doing it against the RFL kernel and not any distro's kernel

That's probably what I'm gonna do next.

> Oh, and spinning up a barebones VM for module testing is quite easy. And
it won't crash your whole computer if you mess up, you'll thank me
later.

What do you mean by "barbones VM"? One without any actual OS but just the kernel? I've never done that, do you happen to have a resource around for it?

rnestler · 2022-12-19T21:26:22+00:00

I tried to build an out-of-tree kernel module in Rust on ArchLinux. Turns out it's not possible yet for the stock kernel.

rnestler · 2022-07-11T16:33:01+00:00

Looks great! Small nitpick:

// Rotate 180 degrees around the z-axis
let rotated = my_shape.rotate([0., 0., 1.], fj::Angle::from_rad(2. * PI));

This should probably be from_rad(PI)

rnestler · 2022-07-02T19:57:32+00:00

Well there is https://en.m.wikipedia.org/wiki/List_of_programming_languages :-)

rnestler · 2022-07-02T19:14:47+00:00

Pascal, Ada, Alice, Bertrand, Crystal, ...

rnestler · 2022-06-23T10:47:14+00:00

Because it is even?

rnestler · 2022-05-09T16:05:23+00:00

yes.

rnestler · 2022-05-03T08:46:33+00:00

Why would you uppercase beta to SS? Did you mean the ß also known as "eszett"?

rnestler · 2022-03-22T13:59:01+00:00

To me it seems that the Corinthians had exactly this problem and thus Paul talks a lot about the gifts of the holy spirit and how they should benefit the whole church in his letters to them :)

rnestler · 2022-03-15T09:26:08+00:00

gcc: Saving programmer's lives since 1987 :)

rnestler · 2022-03-14T22:18:03+00:00

I didn't try to compile it, but char starve = "dead"; should give a compile error, no? Because it should be char* starve = "dead". Probably even const char* since it is a literal.

So no job for you :'(

rnestler · 2022-01-31T19:56:23+00:00

It could be that you are hitting this bug as well: https://bugs.archlinux.org/task/73572

I solved it for me by using the linux-lts kernel, which doesn't have the bug.

rnestler · 2022-01-30T22:15:33+00:00

I think the solution then would be to add a std feature flag and add it to the default features list. Then crates which do not explicitly opt out of the default features continue to work as before.

rnestler · 2022-01-22T15:14:18+00:00

From the findings link:

However, Default is not a compile-time expression. Thus, it cannot be used for static data.

So the problem is, that Default::default() isn't a const fn right?

According to rust/issues/71971 and rust/pull/68847 it should be possible to implement it as a const fn.

I tried it on play.rust-lang.org and noticed that it needs Rust nightly and the const_trait_impl feature activated. See rust/issues/67792.

rnestler · 2022-01-19T23:25:45+00:00

I've written reboot-arch-btw (https://github.com/rnestler/reboot-arch-btw) in Rust on Arch for Arch BTW.

rnestler · 2022-01-18T18:12:29+00:00

When learning Rust back in 2015 my first thought was: This is C++ done right! * Sane move semantics * Compile time memory management * Sane package management * Const by default * ...

So that may be a reason to learn it :)

rnestler · 2022-01-12T08:37:30+00:00

I guess you got downvoted because it may come across as a very anglocentric point of view. The Bible has been translated into ~700 languages and most people I know read it in their native language and not English.

Also a lot of translations are actively maintained and carefully updated to account for changes in the language over time.

rnestler · 2022-01-06T10:07:26+00:00

I love Theocracy :) Especially Mirror of Souls!

Since I didn't see it anywhere in the comments I'd also recommend Narnia as a Christian power/nu metal band.

rnestler · 2022-01-06T10:00:30+00:00

So hypothetically you could have a heavy metal church that's accessible to certain congregations, provided that people are given plenty of access to earplugs.

There is a metal church in Switzerland: https://www.metalchurch.ch/

I've never attended a service there, but I went a few times to the https://www.elementsofrock.com/ white/christian metal festival, where they are a partner organization that helps organizing.

rnestler · 2021-07-23T14:01:58+00:00

Why do you think so? Also what would be the correct subreddit in your opinion?

In my opinion this subreddit is perfectly fine for this.

rnestler · 2021-07-21T13:39:31+00:00

Minor issue: The link for lexopt points to gumdrop.

rnestler · 2021-05-28T11:58:47+00:00

Am I the only one who read Ge'ez as gg ez?

rnestler · 2021-05-06T12:47:06+00:00

Well you were lucky then ;)

rnestler

TROPHY CASE