Should push_target pop all targets?

[Andrew Cagney <ac131313 at redhat dot com>]

Hello,

The current push_target code:

>   /* Find the proper stratum to install this target in. */
>
>   for (prev = NULL, cur = target_stack; cur; prev = cur, cur = cur->next)
>     {
>       if ((int) (t->to_stratum) >= (int) (cur->target_ops->to_stratum))
>         break;
>     }
>
>   /* If there's already targets at this stratum, remove them. */

only pops targets at the stratum level being pushed.  Doing this - 
changing the target underneath ones feet - just scares me.

I think this should be changed so that all targets above that one get 
poped.  If they are still needed, they can be re-pushed.

I suspect this will affect core-file and thread targets ...
Andrew