Red Bear OS
ac6068f9ad
The first header render was ugly on a real (wide) UEFI console: the frame was
stretched to the full console width, leaving a small, thin figlet wordmark
floating in a huge dotted box, and the "standard" figlet line-art read as jagged
in the low-res boot font.
- Switch the wordmark to the figlet "banner" font: bold solid #-block letters
that read clearly at boot-console resolution (one line, pure ASCII).
- Draw a tight box that hugs the wordmark and center the whole box on screen,
instead of a full-width frame. On a 154-column console the box is ~73 wide
and centered, not stretched edge to edge.
- Left-justify each wordmark row (the art is column-0 aligned); centering rows
individually would have broken the letters' vertical alignment.
Verified: cargo check passes for x86_64-unknown-uefi (--bin) and
x86-unknown-none (--lib).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Bootloader
Redox OS Bootloader
Requirements
These software needs to be available on the PATH at build time:
Building
make TARGET=<triplet> BUILD=build all
The <triplet> is one of:
| ARCH | Boot Mode | Triplets |
|---|---|---|
i686 |
BIOS | x86-unknown-none |
x86_64 |
BIOS | x86-unknown-none |
x86_64 |
UEFI | x86_64-unknown-uefi |
aarch64 |
UEFI | aarch64-unknown-uefi |
riscv64gc |
UEFI | riscv64gc-unknown-uefi |
See mk directory for more information of how the build is working.
Entry points
Please read Boot Process in the Redox OS Book for an introductory guide.
In this source code, some interesting files for entry points are:
- BIOS boot stages: asm/x86-unknown-none/bootloader.asm
- BIOS boot entry:
fn startat src/os/bios/mod.rs - UEFI boot entry:
fn mainat src/os/uefi/mod.rs - Common boot process:
fn mainat src/main.rs - UEFI kernel entry:
fn kernel_entryin each arch:x86_64: src/os/uefi/arch/x86_64.rsaarch64: src/os/uefi/arch/aarch64.rsriscv64gc: src/os/uefi/arch/riscv64/mod.rs
Debugging
QEMU
make TARGET=<triplet> BUILD=build qemu
How To Contribute
To learn how to contribute to this system component you need to read the following document:
Development
To learn how to do development with this system component inside the Redox build system you need to read the Build System and Coding and Building pages.