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Updates in January 2020
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title = "Updates in January 2020" | ||
date = 2020-02-01 | ||
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This post gives an overview of the recent updates to the _Writing an OS in Rust_ blog and the corresponding libraries and tools. | ||
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## `blog_os` | ||
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The repository of the _Writing an OS in Rust_ blog received the following updates: | ||
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- [Move #[global_allocator] into allocator module](https://github.com/phil-opp/blog_os/pull/714) | ||
- [Update many_boxes test to scale with heap size](https://github.com/phil-opp/blog_os/pull/716) | ||
- [New post about allocator designs](https://github.com/phil-opp/blog_os/pull/719) 🎉 | ||
- [Provide multiple implementations of align_up and mention performance](https://github.com/phil-opp/blog_os/pull/721) | ||
- [Refactor Simplified Chinese translation of post 3](https://github.com/phil-opp/blog_os/pull/725) by [@Rustin-Liu](https://github.com/Rustin-Liu) | ||
- [Use checked addition for allocator implementations](https://github.com/phil-opp/blog_os/pull/726) | ||
- [Fix dummy allocator code example](https://github.com/phil-opp/blog_os/pull/728) | ||
- [Some style updates to the front page](https://github.com/phil-opp/blog_os/pull/729) | ||
- [Mark active item in table of contents](https://github.com/phil-opp/blog_os/pull/733) | ||
- [Make active section link more discreet](https://github.com/phil-opp/blog_os/pull/734) by [@Menschenkindlein](https://github.com/Menschenkindlein) | ||
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I also started working on the upcoming post about threads. | ||
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## `bootloader` | ||
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The bootloader crate received two minor updates this month: | ||
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- [Move architecture checks from build script into lib.rs](https://github.com/rust-osdev/bootloader/pull/91) | ||
- [Update x86_64 dependency to version 0.8.3](https://github.com/rust-osdev/bootloader/pull/92) by [@vinaychandra](https://github.com/vinaychandra) | ||
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Since I focused my time on the new _Allocator Designs_ post, I did not have the time to make more progress on my plan to rewrite the 16-bit/32-bit stages of the bootloader in Rust. I hope to get back to it soon. | ||
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## `bootimage` | ||
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There were no updates to the `bootimage` tool this month. | ||
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## `x86_64` | ||
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The following changes were merged this month: | ||
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- [Allow immediate port version of in/out instructions](https://github.com/rust-osdev/x86_64/pull/115) by [@m-ou-se](https://github.com/m-ou-se) | ||
- [Make more functions const](https://github.com/rust-osdev/x86_64/pull/116) by [@m-ou-se](https://github.com/m-ou-se) | ||
- Released as version 0.8.3 | ||
- [Return the UnusedPhysFrame on MapToError::PageAlreadyMapped](https://github.com/rust-osdev/x86_64/pull/118) by [@haraldh](https://github.com/haraldh) | ||
- This is a **breaking change** since it changes the signature of a type. | ||
- No new release was published yet to give us the option to bundle it with other breaking changes. | ||
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There are also some pull requests that have some open design questions and are still being discussed: | ||
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- [Add p23_insert_flag_mask argument to mapper.map_to()](https://github.com/rust-osdev/x86_64/pull/114) by [@haraldh](https://github.com/haraldh) | ||
- Related proposal: [Page Table Visitors](https://github.com/rust-osdev/x86_64/issues/121) by [@mark-i-m](https://github.com/mark-i-m) | ||
- [Add User Mode registers](https://github.com/rust-osdev/x86_64/pull/119) by [@vinaychandra](https://github.com/vinaychandra) | ||
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Please feel free to join these discussions if you have opinions on the matter. | ||
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## `cargo-xbuild` | ||
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The `cargo-xbuild` crate, which cross-compiles the sysroot, received the following updates this month: | ||
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- [Override target path for building sysroot](https://github.com/rust-osdev/cargo-xbuild/pull/52) by [@upsuper](https://github.com/upsuper) | ||
- Published as version 0.5.21 | ||
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## `uart_16550` | ||
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The `uart_16550` crate, which provides basic support for uart_16550 serial output, received a small dependency update: | ||
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- [Update dependency for x86_64](https://github.com/rust-osdev/uart_16550/pull/4) by [@haraldh](https://github.com/haraldh) | ||
- Published as version 0.2.2 |
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