Re: [PATCH v2 16/19] gendwarfksyms: Add support for reserved structure fields

[Sami Tolvanen]

Hi Miroslav,

On Fri, Aug 30, 2024 at 9:34 AM Miroslav Benes <mbenes@xxxxxxx> wrote:
>
> yes, this is one of the approaches we use in SLES. We add kabi paddings
> to some structures in advance (see [1] as a random example) and then use
> it later if needed.
>
> It is not the only approach. Much more often we do not have a padding and
> use alignment holes ([5]), addition of a new member to the end of a
> structure ([2] or [3]) and such "tricks" ([4] for a newly fully defined
> structure).

Thanks for bringing this up! Sounds like we're also going to need a
way to completely exclude specific fields from the output then. I
think we can use a similar union approach, but instead of instructing
the tool to use another type, we can just indicate that the field
should be skipped. I'll come up with a solution for v3.

Sami