[Bug 292548] openssl/openssh: Illegal instruction on POWER7

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292548

Ed Maste <emaste@freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |emaste@freebsd.org

--- Comment #1 from Ed Maste <emaste@freebsd.org> ---
To confirm, this is installed from the official 15.0 install image (and not a
custom build)?

OpenSSL has a rather "baroque" build system that generates assembly source from
perl scripts, see e.g. crypto/openssl/crypto/perlasm/ppc-xlate.pl:

my $vshasigmad  = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_,
$st<<4|$six, 1730); };
my $vshasigmaw  = sub { my ($st,$six)=splice(@_,-2); vcrypto_op(@_,
$st<<4|$six, 1666); };

and generated files like sys/crypto/openssl/powerpc64/sha256p8-ppc.S:

        vadduwm 6,6,28
        vadduwm 7,7,29
        .long   0x13C4FE82
        vadduwm 7,7,30
        vxor    29,0,1
        vsel    29,1,2,29
        vadduwm 3,3,7
        .long   0x13C08682
        vadduwm 30,30,29
        vadduwm 7,7,30

The generated files are added to the tree, so any build-time config to set the
CPU type will have no effect.

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