multiboot2/multiboot2

multiboot2

Library that assists parsing the Multiboot2 Information Structure (MBI) from Multiboot2-compliant bootloaders, such as GRUB. It supports all tags from the specification including full support for the sections of ELF files. This library is no_std and can be used in a Multiboot2-kernel.

It follows the Multiboot 2.0 specification at https://www.gnu.org/software/grub/manual/multiboot2/multiboot.html and the ELF 64 specification at http://www.uclibc.org/docs/elf-64-gen.pdf.

Features and no_std Compatibility

This library is always no_std without alloc. However, the default builder- feature requires the alloc-crate and an #[global_allocator] to be available. You need the builder only if you want to construct new boot information structures at runtime. For parsing, this is not relevant, and you can deactivate the default feature.

Background: The Multiboot 2 Information Structure

The Multiboot information structure looks like this:

Field	Type
total size	u32
reserved	u32
tags	variable
end tag = (0, 8)	(u32, u32)

There are many different types of tags, but they all have the same beginning:

Field	Type
type	u32
size	u32
other fields	variable

All tags and the mbi itself are 8-byte aligned. The last tag must be the end tag, which is a tag of type 0 and size 8.

MSRV

The MSRV is 1.68.0 stable.

License & Contribution

See main README file.