Red Bear OS
6407d28c26
The countdown row was derived as list_y - 4, which landed one row too low (on the "Use Up/Down" line) instead of on the header line printed before the loop. The in-loop countdown therefore rendered a second "Autobooting in X seconds" copy directly below the static header, showing the phrase twice. Capture the header's row with get_text_position() right before printing it, so the loop updates that exact line in place — one countdown line, no stale copy. 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.