Viewing profile — phil-opp

Location: Karlsruhe, Germany Remote: yes Willing to relocate: no Technologies: Rust, systems programming, operating systems, embedded, open-source software Resume: https://www.link…

Great to hear that! I also found the official documentation a bit short on background information, so I decided to write my own explanation rather than link to something existing. …

For single threaded programs you can e.g. use a Mutex implementation that only disables interrupts for the critical section ( https://docs.rust-embedded.org/book/concurrency/#mutex…

Thanks! I created them using draw.io ( https://about.draw.io/ ).

> I'll prepare an update to fix this. Update in https://github.com/phil-opp/blog_os/pull/738 and https://github.com/phil-opp/blog_os/pull/739

On the other hand, these strict requirements make sure that the global allocator is thread-safe. Also, I only count two compiler errors mentioned in this post and both have a valid…

> The overflow scenario should be treated the same as the out-of-memory scenario and also return null. Good point! I'll prepare an update to fix this. > It can do better, in `deall…

Thanks so much! Yes, I'm eagerly awaiting https://github.com/rust-lang/rust/pull/58457 and your follow-up https://github.com/rust-lang/rust/pull/60703 . AFAIK, a global allocator i…

An interesting fact about this is that the author is on the Microsoft docs team, which uses a similar system for docs.microsoft.com [1]. So I don't think that GitHub has a problem …

The try_reserve method is exposed on all collection types, e.g. [1],but it is still unstable. [1]: https://doc.rust-lang.org/std/vec/struct.Vec.html#method.try... I did not write m…

There is some minimal support for fallible allocation through the try_reserve method on various collections. See https://github.com/rust-lang/rust/issues/48043 for more information…

Great to hear that!

It's the first time that I hear about Rust on medical devices. Sounds really interesting! I'm glad to hear that my blog was useful to you! > I have been trying to hack at the utest…

Author here. This post is a rewrite of the previous Unit Testing [1] and Integration Tests [2] posts. It creates a custom test framework that runs test functions inside QEMU, so th…

Thanks for the detailed reply! I don't like the traditional GRUB approach because it leaves so much work for the kernel (assembly entry point, stack setup, creation of new page tab…

It is possible to access other address spaces, it is just a bit more complicated: - Set the recursive entry of the active level 4 table to the (recursive) level 4 table of the othe…

Thanks for the feedback! I chose recursive page tables because the underlying mapping is very simple as it only requires to map a single level 4 page table entry. Thus, the bootloa…

I assume backwards compatibility. It's a much smaller change to existing operating systems than to create a completely new page table format.

Thanks! Fixed in https://github.com/phil-opp/blog_os/commit/f423c068fec803725...

They were created with draw.io ( https://about.draw.io/ ).