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Date:      Tue, 31 May 2022 17:20:19 +0000
From:      bugzilla-noreply@freebsd.org
To:        x11@FreeBSD.org
Subject:   [Bug 263845] graphics/libglvnd: Library compiled in ARM mode, but executes in Thumb mode, crashing programs on FreeBSD 13 armv7 with SIGILL
Message-ID:  <bug-263845-7141-CJkIOojtlg@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-263845-7141@https.bugs.freebsd.org/bugzilla/>
References:  <bug-263845-7141@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263845

Robert Clausecker <fuz@fuz.su> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |x11@FreeBSD.org
 Attachment #234353|                            |maintainer-approval?(x11@Fr
              Flags|                            |eeBSD.org)

--- Comment #4 from Robert Clausecker <fuz@fuz.su> ---
Created attachment 234353
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D234353&action=
=3Dedit
graphics/libglvnd: fix on armv7

The .thumb_func directive does not switch to thumb mode in clang's
integrated assembler.  This causes the code to be miscompiled in that
it is generated as ARM code but the symbols are tagged as thumb.  The
resulting library is unusable.  Every call into it crashes.

Add a patch to fix the behaviour and bump PORTREVISION so consumers
get the updated library.

Tested with Poudriere on armv7 FreeBSD 13.
Please MFH if possible.

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