On 3/9/20 1:54 PM, H.J. Lu wrote:

quoted

If a program with the magic ELF CET flags missing can’t make a
thread with IBT and/or SHSTK enabled, then I think we’ve made an
error and should fix it.

A non-CET program can start a CET program and vice versa.

Could we be specific here, please?

HJ are you saying that:
* CET program can execve() a non-CET program, and
* a non-CET program can execve() a CET program

?

That's obvious.

But what are the rules for clone()?  Should there be rules for
mismatches for CET enabling between threads if a process (not child
processes)?