[Bug 207732] libgcc_s .eh_frame handling messes up interpreting powerpc/powerpc64 frame pointer register use produced by clang 3.8.0
bugzilla-noreply at freebsd.org
bugzilla-noreply at freebsd.org
Sun Mar 6 08:13:58 UTC 2016
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207732
Mark Millard <markmi at dsl-only.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |Not A Bug
Status|New |Closed
--- Comment #2 from Mark Millard <markmi at dsl-only.net> ---
With the other errors identified and reported for .eh_frame and C++ exception
handling for powerpc it is getting harder to tell if a problem is a new problem
or a consequence of the other ones. (Various problems have no work around yet
to avoid them.)
This turned out to be a consequence of the other problems.
It was easier to discover once I induced gcc 4.2.1 to generate some example
code with r31 in use as a frame pointer. (I used alloca.) Observing its
behavior and the .eh_frame output indicated I'd misinterpreted where the
earliest problem was.
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