Greetings,

Attached patch fixes BZ #15121 -- x/a broken for addresses in shared libraries.
Not adding a new test since this is already covered by gdb.base/long_long.exp

Tested on Linux/x86_64, no new failures.

Thanks,

ChangeLog:

2015-09-06  Paul Pluzhnikov  <ppluzhnikov@google.com>

        [BZ #15121]
        * gdb/value.c (unpack_pointer): Don't sign-extend.

testsuite/ChangeLog:

2015-09-06  Paul Pluzhnikov  <ppluzhnikov@google.com>

        * gdb.base/long_long.exp: Adjust.

-- 
Paul Pluzhnikov