[openssl-dev] [openssl.org #4667] Issue with OpenSSL v1.1.0 on AIX with XLC and GCC and -O

[REIX, Tony via RT]

Hi Andy,

Your patch DOES work fine with GCC 6.2.0 and -O, both for 32 & 64bits.
It also works fine with XLC v12.1.0.14 and -O in 64bits (was OK in 32bits).

Thanks for your help !

Regards,

Tony

Le 03/09/2016 00:42, Andy Polyakov via RT a écrit :

- GCC 6.1.0 is: KO, 64 & 32 bits:
#   Failed test 'running evp_test evptests.txt'
#   at ../test/recipes/30-test_evp.t line 18.
# Looks like you failed 1 test of 1.
../test/recipes/30-test_evp.t ..............
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/1 subtests



Phew! Mystery solved! Verify attached patch. Trouble was that vector
ChaCha subroutine relies on its alignment in memory. But on AIX it's
impossible to *control* alignment with desired granularity without
specifying higher alignment for .text segment itself. And .text
directive was missing in chacha-ppc module :-( So it's not exactly
optimizations of ppccap.o that mattered, but its changing size depending
on optimization options that was affecting chacha subroutine's
alignment. It actually *could* be vice versa, i.e. work with
optimizations on and fail without, it's all about a coincidence.


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