PTs
2021 - ongoing, C-Stem
PTs: A generic page-table walker/mapper
I had to write page-table walking, mapping, unmapping so many times in my life… Sometimes for 3 levels, sometimes 4 or 5, sometimes for regular page-tables, sometimes extended or I/O mmu ones… Sometimes in C, sometimes in Rust or Go… Sometimes for x86, sometimes for Risc-V…
To make my life easier, and as part of my C-Stem project, I decided to write a generic walker/mapper in C, that can compile without any libc dependency (very useful if you wanna use it inside a driver).
The library defines profiles for x86 and Risc-V right now, i.e., specific implementations for these two data-structures.
It could easily be extended to support other page-table formats/other architectures.
I might add a Rust and Go implementation in the future…