This Month in Rust OSDev: October 2022

content/this-month/2022-10/index.md

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+title = "This Month in Rust OSDev: October 2022"
+date = 2022-11-07
+
+[extra]
+month = "October 2022"
+editors = ["phil-opp", "IsaacWoods"]
++++
+
+Welcome to a new issue of _"This Month in Rust OSDev"_. In these posts, we give a regular overview of notable changes in the Rust operating system development ecosystem.
+
+<!-- more -->
+
+This series is openly developed [on GitHub](https://github.com/rust-osdev/homepage/). Feel free to open pull requests there with content you would like to see in the next issue. If you find some issues on this page, please report them by [creating an issue](https://github.com/rust-osdev/homepage/issues/new) or using our [_comment form_](#comment-form) at the bottom of this page.
+
+<!--
+    This is a draft for the upcoming "This Month in Rust OSDev (October 2022)" post.
+    Feel free to create pull requests against the `next` branch to add your
+    content here.
+    Please take a look at the past posts on https://rust-osdev.com/ to see the
+    general structure of these posts.
+-->
+
+## `rust-osdev` Projects
+
+In this section, we give an overview of notable changes to the projects hosted under the [`rust-osdev`] organization.
+
+[`rust-osdev`]: https://github.com/rust-osdev/about
+
+<!--
+    Please use the following template:
+
+    ### [`repo_name`](https://github.com/rust-osdev/repo_name)
+    <span class="maintainers">Maintained by [@maintainer_1](https://github.com/maintainer_1)</span>
+
+    The `repo_name` crate ...<<short introduction>>...
+
+    We merged the following changes this month:
+    <<changelog, either in list or text form>>
+-->
+
+### [`uefi-rs`](https://github.com/rust-osdev/uefi-rs)
+<span class="maintainers">Maintained by [@GabrielMajeri](https://github.com/GabrielMajeri), [@nicholasbishop](https://github.com/nicholasbishop), and [@phip1611](https://github.com/phip1611)</span>
+
+- [Change `Event` to be FFI-safe using `NonNull`](https://github.com/rust-osdev/uefi-rs/pull/507)
+- [Add `guid!` macro](https://github.com/rust-osdev/uefi-rs/pull/536)
+- [Add Guid methods to convert to/from byte arrays](https://github.com/rust-osdev/uefi-rs/pull/535)
+- [Fixes and improvements for `Revision`](https://github.com/rust-osdev/uefi-rs/pull/529)
+- [Replace `UnalignedCStr16` with `UnalignedSlice`](https://github.com/rust-osdev/uefi-rs/pull/539)
+- [Add new `DeviceSubType` values](https://github.com/rust-osdev/uefi-rs/pull/537)
+- [Fix clippy warnings](https://github.com/rust-osdev/uefi-rs/pull/538)
+- [uefi-services: Change panic handler log message.](https://github.com/rust-osdev/uefi-rs/pull/526)
+
+Thanks to [@timrobertsdev](https://github.com/timrobertsdev) and [@raccog](https://github.com/raccog) for their contributions!
+
+<!--
+- [Copy license file to uefi-macros and uefi-services](https://github.com/rust-osdev/uefi-rs/pull/520)
+- [Fix clippy lint by removing unnecessary cast](https://github.com/rust-osdev/uefi-rs/pull/525)
+- [Update documentation section of readme](https://github.com/rust-osdev/uefi-rs/pull/519)
+- [Fix warning from unneeded `macro_use`](https://github.com/rust-osdev/uefi-rs/pull/527)
+- [Add option to disable network tests](https://github.com/rust-osdev/uefi-rs/pull/528)
+- [Tweak pull request template wrapping](https://github.com/rust-osdev/uefi-rs/pull/533)
+- [ci: Simplify some jobs with ubuntu-22.04 runner](https://github.com/rust-osdev/uefi-rs/pull/532)
+-->
+
+
+### [`linked-list-allocator`](https://github.com/rust-osdev/linked-list-allocator)
+<span class="maintainers">Maintained by [@phil-opp](https://github.com/phil-opp) and [@jamesmunns](https://github.com/jamesmunns)</span>
+
+- [Consider regions that lead to very small back paddings as unsuitable](https://github.com/rust-osdev/linked-list-allocator/pull/71)
+  - Fixes a potential [memory leak](https://github.com/rust-osdev/linked-list-allocator/issues/66) that was introduced with `v0.10`.
+- [Add a random action fuzzer](https://github.com/rust-osdev/linked-list-allocator/pull/69)
+  - Runs randomized tests against the `allocate_first_fit`, `deallocate`, and `extend` methods
+  - This is the fuzzer that was used to discover the [possible out-of-bounds writes in versions `<=0.10.1`](https://github.com/rust-osdev/linked-list-allocator/security/advisories/GHSA-xg8p-34w2-j49j)
+- [Run new cargo-fuzz job on CI with time limit](https://github.com/rust-osdev/linked-list-allocator/pull/72)
+  - Fuzzes each commit and PR for 5 minutes as a guard against regressions
+  - The CI job is also run on schedule every day to test against the latest Rust nightly and to increase the chance of finding improbably bugs over time.
+
+Thanks to [@evanrichter](https://github.com/evanrichter) for their contribution!
+
+### [`bootloader`](https://github.com/rust-osdev/bootloader)
+<span class="maintainers">Maintained by [@phil-opp](https://github.com/phil-opp), [@rybot666](https://github.com/rybot666), and [@64](https://github.com/64)</span>
+
+We merged the following changes this month:
+
+- [Update `noto-sans-mono-bitmap` to `v0.2.0`](https://github.com/rust-osdev/bootloader/pull/267)
+  - now supports more unicode ranges, including the fallback character `�`
+  - code ranges are optional via cargo features to minimize binary size
+- [implement read-only relocations](https://github.com/rust-osdev/bootloader/pull/269)
+  - implements `GNU_RELRO` program header handling to make relocations read-only
+- [allow booting without a UEFI graphics output](https://github.com/rust-osdev/bootloader/pull/268)
+  - don't error if no UEFI framebuffer is detected
+  - this was merged into the `next` branch for the upcoming `v0.11` release
+
+Thanks to [@phip1611](https://github.com/phip1611), and [@Freax13](https://github.com/Freax13) for their contributions!
+
+### [`acpi`](https://github.com/rust-osdev/acpi)
+<span class="maintainers">Maintained by [@IsaacWoods](https://github.com/IsaacWoods)</span>
+
+This month, we began work to remove `acpi`'s dependence on the `alloc` crate for allocations, instead directly
+using the [`core::alloc::Allocator`](https://doc.rust-lang.org/beta/core/alloc/trait.Allocator.html) API. This
+improves support for bootloaders and kernels that want to treat memory allocation as fallible, allowing them to
+more gracefully recover from out-of-memory situations. In the future, we hope that this support will be brought
+into `alloc`, so that the library can return to using the standard containers.
+
+These changes are not yet finished or released, but a new major version will likely be out in December with these
+changes, as well as better support for PCI topologies with multiple segment groups, and a few other changes. If
+you'd like to make use of these new features as they're developed, they're already in `main`, so you can use a Git
+dependency.
+
+- [Rework crate to work without allocations](https://github.com/rust-osdev/acpi/pull/131)
+- [Add Debug implementations](https://github.com/rust-osdev/acpi/pull/128)
+
+Thanks to [@semiviral](https://github.com/semiviral), and [@mattfbacon](https://github.com/mattfbacon) for their contributions!
+
+## Call for Participation
+
+Want to contribute to a Rust OSDev project, but don't know where to start? Help with one of these outstanding issues!
+
+<!--
+    Please use the following template for adding items:
+    - [(`repo_name`) Issue Description](https://example.com/link-to-issue)
+-->
+
+If you maintain a Rust project related to operating system development and are looking for contributors, especially for tasks suited to people getting started in this space, please [create a PR](https://github.com/rust-osdev/homepage/pulls) against the `next` branch with the tasks you want to include in the next issue.
+
+## Other Projects
+
+In this section, we describe updates to Rust OS projects that are not directly related to the `rust-osdev` organization. Feel free to [create a pull request](https://github.com/rust-osdev/homepage/pulls) with the updates of your OS project for the next post.
+
+<!--
+    Please use the following template:
+
+    ### [`owner_name/repo_name`](https://github.com/rust-osdev/owner_name/repo_name)
+    <span class="maintainers">(Section written by [@your_github_name](https://github.com/your_github_name))</span>
+
+    ...<<your project updates>>...
+-->
+
+### [`d-sonuga/blog-blasterball`](https://github.com/d-sonuga/blog-blasterball/)
+<span class="maintainers">(Section written by [@d-sonuga](https://github.com/d-sonuga))</span>
+
+[Demilade Sonuga's Blog](https://d-sonuga.netlify.app/) is a new blog on writing a
+simple blasterball game with no OS, no engine and minimal external crates. The blog's aim is to take a Rust
+beginner from starting the project to finishing it and understanding everything involved in the project's
+creation.
+
+The project is still in it's early stages, so lots of feedback is very much needed.
+
+If you're interested, please take a look, and send your thoughts to [@d_sonuga](https://twitter.com/d_sonuga/)
+on Twitter.
+
+### Talk on Windows Linked Lists in safe and idiomatic Rust
+<span class="maintainers">(Section written by [@ColinFinck](https://github.com/ColinFinck))</span>
+
+At the first ever EuroRust conference from 13th to 14th October, Colin Finck gave a talk about the challenges of developing his [`nt-list`](https://github.com/ColinFinck/nt-list) crate.
+The crate provides a safe and idiomatic Rust wrapper around the Windows variant of Linked Lists.
+It was presented on this blog [in July](/this-month/2022-07/#nt-list-windows-linked-lists-in-idiomatic-rust).
+
+A [recording](https://www.youtube.com/watch?v=IxhZIyXOIw8) of the talk has just been uploaded.
+Check it out, and also check out the [other videos](https://www.youtube.com/channel/UCR3gXcme1HMK7_TrUaNZOqw/videos) from that conference for some great takes on Rust!
+
+[![Preview of video: Windows linked lists in safe and idiomatic Rust - Colin Finck - EuroRust 2022](nt-list-video.jpg "Preview of video: Windows linked lists in safe and idiomatic Rust - Colin Finck - EuroRust 2022")](https://www.youtube.com/watch?v=IxhZIyXOIw8)
+
+### [`MaderNoob/galloc`](https://github.com/MaderNoob/galloc)
+<span class="maintainers">(Section written by [@phil-opp](https://github.com/phil-opp))</span>
+
+The new [`good_memory_allocator`](https://crates.io/crates/good_memory_allocator) crate implements a `no_std`-compatible linked list allocator, inspired by the [`dlmalloc`](https://gee.cs.oswego.edu/dl/html/malloc.html) algorithm. It stores an additional `usize` of metadata per allocation, which decreases memory efficiency, but increased runtime efficiency. The `README` includes promising [benchmark results](https://github.com/MaderNoob/galloc#benchmarks) that compare the crate against the [`linked-list-allocator`](https://github.com/rust-osdev/linked-list-allocator) and [`simple-chunk-allocator`](https://github.com/phip1611/simple-chunk-allocator) crates.
+
+### [`phil-opp/blog_os`](https://github.com/phil-opp/blog_os)
+<span class="maintainers">(Section written by [@phil-opp](https://github.com/phil-opp))</span>
+
+We merged the following changes to the [_Writing an OS in Rust_](https://os.phil-opp.com/) blog this month:
+
+- [Korean translation of _Testing_ post](https://github.com/phil-opp/blog_os/pull/1135)
+  - Read it at <https://os.phil-opp.com/ko/testing/>
+  - Thanks to [@JOE1994](https://github.com/JOE1994) for creating the translation and to [@SNOOPYOF](https://github.com/SNOOPYOF) and [@dalinaum](https://github.com/dalinaum) for reviewing!
+- [Korean translation of _CPU Exceptions_ post](https://github.com/phil-opp/blog_os/pull/1162)
+  - Read it at <https://os.phil-opp.com/ko/cpu-exceptions/>
+  - Thanks to [@JOE1994](https://github.com/JOE1994) for creating the translation and to [@KimWang906](https://github.com/KimWang906) for reviewing!
+- [French translation of _A Minimal Rust Kernel_ post](https://github.com/phil-opp/blog_os/pull/1144)
+  - Read it at <https://os.phil-opp.com/fr/minimal-rust-kernel/>
+  - Thanks to [@TheMimiCodes](https://github.com/TheMimiCodes) and [@maximevaillancourt](https://github.com/maximevaillancourt) for creating the translation and to [@alaincao](https://github.com/alaincao) for reviewing (and for [fixing links](https://github.com/phil-opp/blog_os/pull/1166))!
+- [Update zola to v0.16.1](https://github.com/phil-opp/blog_os/pull/1147)
+- [Fixes bad URL from `post-09` address calculation section](https://github.com/phil-opp/blog_os/pull/1146) <span class="gray">(thanks to [@seewishnew](https://github.com/seewishnew))</span>
+- [Remove warning output from QEMU command](https://github.com/phil-opp/blog_os/pull/1151) <span class="gray">(thanks to [@lovemeforareason](https://github.com/lovemeforareason))</span>
+
+## Other News
+
+- [Rust UEFI Firmware Targets Promoted To Tier-2 Status](https://www.phoronix.com/news/Rust-UEFI-Promoted-Tier-2)
+- [Microsoft seems to ship Rust code in Windows Font Parsing (dwrite)](https://twitter.com/dwizzzleMSFT/status/1578532292662005760)
+- Announcement of [COSMIC Text](https://github.com/pop-os/cosmic-text), a pure Rust library for font shaping, layout, and rendering
+  - Based on [`rustybuzz`](https://github.com/RazrFalcon/rustybuzz) and [`swash`](https://github.com/dfrg/swash), with custom layout and font fallback implementations
+  - Developed for the upcoming Rust-based desktop environment for [Pop_OS](https://pop.system76.com/) and also usable for [Redox OS](https://www.redox-os.org/)
+
+## Join Us?
+
+Are you interested in Rust-based operating system development? Our `rust-osdev` organization is always open to new members and new projects. Just let us know if you want to join! A good way for getting in touch is our [gitter channel](https://gitter.im/rust-osdev/Lobby).