No way to distinguish between "core files" and "other files".

[ret2libc]

Is your feature request related to a problem? Please describe.
I want to use ou to specify which file to use, when I have multiple ones available, however when I look at the output of o I see multiple files available, including some null:// and vfile:// and other kind of files. When I use ou I can only use the core files though and there is no way to know which of the entries in the o output represent core files.

Describe the solution you'd like
A very very short term solution could be to just add a flag or something to the o table to specify whether the file is core file or not, but this issue is more of a general thing to think about.

What is a binfile for a user?
What is a core file?
What is a file like malloc://X?