[PATCH][aarch64] Fix hwcap argument passed to ifunc resolvers

[Steve Ellcey]

On Thu, 2017-08-31 at 18:59 -0500, Carlos O'Donell wrote:

> I'd just use the tunables.

OK, I think using tunables is reasonable. Â I seem to be having some
trouble with it though, maybe you can tell me if I am doing something
wrong.

On a thunderx box I run a program that calls memcpy, which is an ifunc.
It then calls __memcpy_thunderx the way I think it should.

Then, in the debugger, I run:

set environment GLIBC_TUNABLES=glibc.tune.cpu=generic

I rerun my test program and instead of calling __memcpy_generic (which
it should) or __memcpy_thunderx (which it did before), it calls
__memcpy_falkor, which is totally wrong. Â Am I setting the variable
incorrectly? Â I don't see any problems with the IS_FALKOR macro so I
think the problem may be in tunable_is_name unless I am just messing
up how GLIBC_TUNABLES is supposed to be set.

Steve Ellcey
sellcey@cavium.com