multiboot2/multiboot2

multiboot2

Convenient and safe parsing of Multiboot2 Boot Information (MBI) structures and the contained information tags. Usable in no_std environments, such as a kernel. An optional builder feature also allows the construction of the corresponding structures.

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.

Design

For every Multiboot2 structure, there is an ABI-compatible rusty type. This enables a zero-copying parsing design while also enabling the creation of these structures via convenient constructors on the corresponding types.

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 features.

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

MSRV

The MSRV is 1.75.0 stable.

License & Contribution

See main README file.