Date: Sat, 7 Oct 2017 17:47:38 -0700 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: Re: Exceptions Handling on PPC64 with clang - gnu ld bug identified Message-ID: <331A07C5-E87B-4644-B716-217EC05BBD39@dsl-only.net>
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Roman Divacky rdivacky at freebsd.org wrote on Sat Oct 7 10:03:10 UTC 2017 : > In a followup to https://lists.freebsd.org/pipermail/freebsd-toolchain/2017-May/002961.html > > I attempted to fix gnu ld in base to fix the wrongly set bit. > > The following patch > http://www.vlakno.cz/~rdivacky/ppc64.exceptions.fix.patch > > switches a few computations to happen in 64bits instead of 32bit and fixes the > wrong personality/LDSA info in binaries. > > As a result clang compiled/assembled c++ binaries with EH start to work for me. > > Can someone verify this works for everyone? I can see the same cast in upstream > binutils but in a couple more places, so this is probably not the final answer > but is good enough for me. Just for the record: in a separate exchange it was realized that: A) This was for a context of a buildworld that was built via gcc 4.2.1 and being able to use clang in such a context. B) This is insufficient to fully fix a buildworld that was built via clang and then use either clang or gcc (such as gcc7) to generate code bound to the system libc++ and libcxxrt for code that throws C++ exceptions. A clang-based builworld results in problems in libc++ and/or libcxxrt for handling thrown C++ exceptions. === Mark Millard markmi at dsl-only.net
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