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Add instructions for running in QEMU, VirtualBox, and on real hardware

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Philipp Oppermann
2018-02-08 22:59:34 +01:00
parent 7be59b571d
commit 5e96335c23
2 changed files with 24 additions and 4 deletions
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blog/content/second-edition/posts/02-minimal-rust-kernel/index.md
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@@ -186,7 +186,7 @@ Compiling for our new target will use Linux conventions. I'm not quite sure why,
#![no_main] // disable all Rust-level entry points #![no_main] // disable all Rust-level entry points
#[lang = "panic_fmt"] // define a function that should be called on panic #[lang = "panic_fmt"] // define a function that should be called on panic
#[no_mangle] // TODO required? #[no_mangle]
pub extern fn rust_begin_panic(_msg: core::fmt::Arguments, pub extern fn rust_begin_panic(_msg: core::fmt::Arguments,
_file: &'static str, _line: u32, _column: u32) -> ! _file: &'static str, _line: u32, _column: u32) -> !
{ {
@@ -314,10 +314,30 @@ To make things easy, we created a tool named `bootimage` that automatically down
You should now see a file named `bootimage.bin` in your crate root directory. This file is a bootable disk image, so can boot it in a virtual machine or copy it to an USB drive to boot it on real hardware. (Note that this is not a CD image, which have a different format, so burning it to a CD doesn't work). You should now see a file named `bootimage.bin` in your crate root directory. This file is a bootable disk image, so can boot it in a virtual machine or copy it to an USB drive to boot it on real hardware. (Note that this is not a CD image, which have a different format, so burning it to a CD doesn't work).
## Booting it! ## Booting it!
We can now boot our kernel in a virtual machine. To boot it in [QEMU], execute the following command:
- qemu [QEMU]: https://www.qemu.org/
- bochs? virtualbox?
- makefile? cargo-make? ```
> qemu-system-x86_64 -drive format=raw,file=bootimage.bin
warning: TCG doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
```
![QEMU showing "Hello World!"](qemu.png)
You can also [convert the raw disk image to a VDI] to load it in [VirtualBox].
[convert the raw disk image to a VDI]: https://blog.sleeplessbeastie.eu/2012/04/29/virtualbox-convert-raw-image-to-vdi-and-otherwise/
[VirtualBox]: https://www.virtualbox.org/
It is also possible to write it to an USB stick and boot it on a real machine:
```
> dd if=bootimage.bin of=/dev/sdX && sync
```
Where `sdX` is the device name of your USB stick. It overwrites everything on that device, so be careful to choose the correct device name.
## What's next? ## What's next?
In the next post, we will explore the VGA text buffer in more detail and write a safe interface for it. We will also add support for the `println` macro. In the next post, we will explore the VGA text buffer in more detail and write a safe interface for it. We will also add support for the `println` macro.
TODO

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