https://github.com/no92/uefi-bare-bones

UEFI "Hello World"
https://github.com/no92/uefi-bare-bones

barebones kernel osdev uefi

Last synced: about 1 month ago
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UEFI "Hello World"

• Host: GitHub
• URL: https://github.com/no92/uefi-bare-bones
• Owner: no92
• License: mit
• Created: 2018-08-04T10:47:57.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2023-03-10T16:13:50.000Z (almost 2 years ago)
• Last Synced: 2024-10-24T00:22:28.813Z (2 months ago)
• Topics: barebones, kernel, osdev, uefi
• Language: C
• Homepage: https://wiki.osdev.org/User:No92/UEFI_Bare_Bones
• Size: 6.84 KB
• Stars: 9
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# UEFI Bare Bones

A minimal "Hello World" kernel.

## Prerequisites

* git, wget, meson, the text editor of your choice, …

* clang with lld-link

## Building

Set up a build directory. Run `meson setup --cross-file uefi.cross-file `. In the build directory, run `ninja`.

Example:

```sh

mkdir -p build

meson setup --cross-file=uefi.cross-file build

cd build

ninja

```

## Running

Make sure you have a `OVMF.fd` ready. If you have a OVMF package installed, it can usually be copied from a path like `/usr/share/ovmf/x64/`.

Set up an ESP in the build directory like this:

```sh

cp /usr/share/ovmf/x64/OVMF.fd .

mkdir -p esp/EFI/BOOT/

cp BOOTX64.EFI esp/EFI/BOOT

```

After this, you can run QEMU. A recommended setup looks like this:

```sh

qemu-system-x86_64 -drive if=pflash,format=raw,file=OVMF.fd -M accel=kvm:tcg -net none -serial stdio -drive format=raw,file=fat:rw:esp

```