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Philipp Oppermann
2016-04-25 21:57:21 +02:00
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blog/post/2015-10-23-printing-to-screen.md
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@@ -8,11 +8,13 @@ aliases = [
In the [previous post] we switched from assembly to [Rust], a systems programming language that provides great safety. But so far we are using unsafe features like [raw pointers] whenever we want to print to screen. In this post we will create a Rust module that provides a safe and easy-to-use interface for the VGA text buffer. It will support Rust's [formatting macros], too.
[previous post]: {{ page.previous.url }}
[previous post]: {{% relref "2015-09-02-set-up-rust.md" %}}
[Rust]: https://www.rust-lang.org/
[raw pointers]: https://doc.rust-lang.org/book/raw-pointers.html
[formatting macros]: https://doc.rust-lang.org/std/fmt/#related-macros
<!--more-->
This post uses recent unstable features, so you need an up-to-date nighly compiler. If you have any questions, problems, or suggestions please [file an issue] or create a comment at the bottom. The code from this post is also available on [Github][code repository].
[file an issue]: https://github.com/phil-opp/blog_os/issues
@@ -452,7 +454,7 @@ In the next posts we will map the kernel pages correctly so that accessing `0x0`
The [next post] describes the Multiboot information structure and creates a frame allocator using the information about memory areas.
[next post]: {{ page.next.url }}
[next post]: {{% relref "2015-11-15-allocating-frames.md" %}}
## Other Rust OS Projects
Now that you know the very basics of OS development in Rust, you should also check out the following projects:
@@ -461,7 +463,7 @@ Now that you know the very basics of OS development in Rust, you should also che
_Note_: You need to [cross compile binutils] to build it (or you create some symbolic links[^fn-symlink] if you're on x86_64).
[Rust Bare-Bones Kernel]: https://github.com/thepowersgang/rust-barebones-kernel
[higher half]: http://wiki.osdev.org/Higher_Half_Kernel
[cross compile binutils]: /cross-compile-binutils.html
[cross compile binutils]: {{% relref "cross-compile-binutils.md" %}}
[^fn-symlink]: You will need to symlink `x86_64-none_elf-XXX` to `/usr/bin/XXX` where `XXX` is in {`as`, `ld`, `objcopy`, `objdump`, `strip`}. The `x86_64-none_elf-XXX` files must be in some folder that is in your `$PATH`. But then you can only build for your x86_64 host architecture, so use this hack only for testing.
- [RustOS]: More advanced kernel that supports allocation, keyboard inputs, and threads. It also has a scheduler and a basic network driver.