Apparently, the call gates and task gates can be used with the LSL instruction to get bytes 0,1 and the 4 bits of byte 6 combined with the granularity flag to get the limit of said descriptor.

But what happens when you use it with the 16/32-bit call gates and task gates? Will it still fetch said bytes, even though there's different data in them?

For a call gate that's offsetlow and the number of arguments combined with the 'granularity' flag in the middle of offsethigh(for 32-bits versions at least, not for 16-bit ones)?
And for a task gate that's reserved bits only?

Why is it legal to use LSL with such an descriptor?

Edit: Hmmm.... https://mudongliang.github.io/x86/html/file_m … x86_id_162.html says the gate descriptors are legal to use.
But https://www.felixcloutier.com/x86/lsl says they aren't legal, which makes more sense(as they have no limit fields)?