[SoothingSorbet]

> PDB (which isn't documented)...

What about https://github.com/Microsoft/microsoft-pdb ? Not technically documentation, but the closest thing to it.

[boricj]

I was mostly aware of https://llvm.org/docs/PDB/index.html, which paints a rather complex high-level picture.

At any rate, while my extension has exporters for both ELF and COFF I'm personally using only the former. The latter is user-contributed and I don't know much about the Microsoft toolchain and file formats.