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Date:      Mon, 31 Oct 2016 05:33:10 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 213778] stable/11 -r307797 on BPi-M3 (cortex-a7): truss gets segmentation fault for handling SIGSYS
Message-ID:  <bug-213778-8-3QoGM3D8LC@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-213778-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-213778-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213778

--- Comment #2 from Mark Millard <markmi@dsl-only.net> ---
(In reply to Mark Millard from comment #1)

FYI notes:

See bugzilla 213936 for material about why lang/gcc6's xgcc's cc1 for
armv6/cortex-a7 gets the SIGSYS (or whatever) in the first place: clang 3.8=
.0's
occasional code generation problems lead to messed up stack handling in cc1=
 and
a stack address in the armv6/cortex-a7 pc register. (lang/gcc6's build had =
not
gotten far enough to have built and be using its own self-hosted cc1 yet.)

Still the cc1 produced by clang 3.8.0 shows crash problems in truss for
handling processes with errors. So the odd code is useful for testing/impro=
ving
truss (and possibly more). For now I'm leaving the BPI-M3 set up for such
activity.

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