scripts: check for .text.startup sections #18603

From #18553:

theuni

Sidenote: we could potentially add a check for illegal instructions in the .text.startup section in one of our python binary checking tools. Though we'd have to create a per-arch blacklist/whitelist to define "illegal".

laanwj

My idea was to forbid .text.startup sections completely in all 'special' compilation units, e.g. those compiled with non-default instruction sets. I think that's easier to implement a check for than instruction white/blacklists.

The section parsing seems straightforward, but is there a less rudimentary way to determine which compilation units have been compiled with special instruction sets than globbing the names like this: https://gist.github.com/willcl-ark/bcc4fffe2abf6760c95913f0c42127d5

#26693 was closed