VDSO behaves like a raw syscall which doesn't set errno.
posix tests are testing that errno is set correctly.
Our VDSO handlers weren't wired up to return errors from VDSO correctly.
To handle this we need to have different handlers depending on if the
syscall being used comes from glibc or true VDSO.
This wasn't being uncovered previously since CI wasn't running with VDSO
thunks enabled, but now that it is this needs to be handled or CI will
fail.
AT_SYSINFO points to the vsyscall location that the kernel provides.
This AUXV value isn't used on x86-64.
If we have VDSO installed then we can use the one provided from there,
otherwise we need to provide a code page.
It seems like some behaviour changed with glibc provided in Ubuntu 22.10
that it now requires AT_SYSINFO.
Fixes wine 7.0 execution inside the Ubuntu 22.10 rootfs.
Ryan Houdek