Re: [PATCH] ld: add --package-metadata

[Florian Weimer <fweimer@redhat.com>]

* Luca Boccassi:

> So with that experience in the bag, the most obvious next step is to
> have a first-class option, that allows a self-contained flag to be
> passed instead. After all the idea is similar to the build-id, and
> there we have a first-class option too, and it works well.

Maybe it's better to just pre-allocate space for the program header note
(and corresponding data) and patch the actual contents in later, maybe
as part of the debuginfo post-processing.

This would also side-step any shell encoding issues of the JSON object.

A really nice approach would require changes to the way we generate
coredumps: teach the dumper to copy non-allocated sections from a file
region.  Then we wouldn't have to pre-allocate section contents at all.
I think the core dumper would have to look at section headers for this,
not program headers.  We could add a program header that describes the
file region to be copied, but it would get out of sync with the file
contents if ELF editing tools don't know that it has to be updated if
non-allocated sections are changed.

Thanks,
Florian