[CentOS] ExecShield in C6 or C7 kernels?

I'm trying to figure out if the stock kernels for Centos-6 and/or Centos-7 have ExecShield compiled in, and if so, if it is turned on by default.

On my local C7 box I've been looking at/for indicators without a lot of success:

/usr/lib/sysctl.d/00-system.conf. does not mention ExecShield at all. /proc/sys/kernel has no entries for exec_shield no mention of execshield in any of the files in /etc/grub.d

So, as far as I can see, there are no settings that I would expect to force ExecShield to an ON setting.

I DO see, in /proc/sys/kernel, a file named randomize_va_space, and it contains a value of "2".

I've been googling (well, actually DuckDuckGo-ing) and most of the articles I find regarding ExecShield are 3-10 years old.

I'd appreciate pointers/guides/info on ExecShield in C6 or C7.

thanks in advance!

Fred