rust-osdev / rust-osdev/bootloader

UEFI boot should provide runtime services to the kernel

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#312 1 comment 1 reaction 0 assignees View on GitHub

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enhancement
Dominant language
Rust
Stars
1.7k
Forks
240
PR merge metrics
No merged PRs in 30d

Description

UEFI runtime services can be useful for a variety of purposes. Some kernels may want access to these at runtime.

The UEFI bootloader should provide support for mapping runtime services, and providing a pointer to the runtime services table via boot info.

BIOS boot would simply set this field to None, as there is no runtime services (or rather, there are interrupts)

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the UEFI boot path and the boot-info structure that is passed to the kernel, then compare how the BIOS path represents unavailable services. Done means UEFI maps runtime services and exposes a pointer to the runtime services table through boot info, while BIOS supplies None.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
operating-systems
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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