Bug#874074: ld.so: TLS relocations against local symbols don't work on powerpc, sparc and sparc64
On 17 Sep 2017, at 20:55, Joe Nosay <superbisquit@gmail.com> wrote:
>
> It no longer exists.
Bah, it expired; recreated at http://paste.debian.net/986532/.
Thanks,
James
> On Sat, Sep 2, 2017 at 2:22 PM, James Clarke <jrtc27@debian.org> wrote:
>> Package: libc6
>> Version: 2.24-17
>> Tags: upstream patch
>> Forwarded: https://sourceware.org/ml/libc-alpha/2017-09/msg00120.html
>> User: debian-sparc@lists.debian.org
>> Usertags: sparc sparc64
>> User: debian-powerpc@lists.debian.org
>> Usertags: powerpc
>> X-Debbugs-Cc: debian-sparc@lists.debian.org, debian-powerpc@lists.debian.org
>>
>> Hi,
>> On the above architectures, TLS relocations against local symbols do not
>> work properly, crashing with SIGBUS or SIGSEGV on accessing the variable
>> in question. This is only a problem when using gold, as bfd will
>> optimise the relocations (since it knows the symbol cannot be pre-empted
>> by one in another object) to not refer to a symbol at all. I have
>> written a test script, available at [0].
>>
>> The above patch has been tested on powerpc and sparc64 using my test
>> script, as well as on sparc64 using my local experimental GHC with
>> native code generation support, where the problem was first seen.
>>
>> Regards,
>> James
>>
>> [0] http://paste.debian.net/plain/984146
>>
>>
>
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