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[Bug gas/32435] [2.44 Regression] gas produces unaligned sections on arm


From: jbeulich at suse dot com
Subject: [Bug gas/32435] [2.44 Regression] gas produces unaligned sections on arm-linux-gnueabihf for kernel build
Date: Fri, 27 Dec 2024 09:01:45 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=32435

--- Comment #16 from Jan Beulich <jbeulich at suse dot com> ---
(In reply to Eric Botcazou from comment #12)
> Ouch.  What was the purpose of this change?  Changing such an old behavior
> for no clear benefits beyond saving a few bytes looks rather questionable. 
> Was it tested with non-GNU linkers in particular?

Just to mention it: It is hardly possible to test with everything that's
around. In fact I'm less worried of linkers - they're typically respecting the
spec quite well. My concern was rather about other tools with (custom) ELF
handling, and as we now see modpost is one such tool.

Furthermore the change isn't just about "a few bytes". It was triggered by me
observing object files growing unreasonably large just because of unusually big
alignment set for perhaps just a single section. In fact it was "a few bytes"
perhaps not mattering much that I added that hint towards a possible further
change, should it turn out that the fallout was too significant.

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