Switch ARM, SPARC and i386 to generic dummy frames (PC_IN_CALL_DUMMY)?

[Andrew Cagney]

> Sorry, you've lost me.  BTW, the line:
> 
>> >> - generic: looks for the FP in the list of dummy frames
> 
>> isn't a typo.
> 
> 
> Certainly.  But didn't you say "fix the first one (search for the PC)"?
> 
> My concern is if we have multiple call frames from (to?) the same PC. 
> That's easy enough to do; I've done it by accident plenty of times.

Sorry, you've still lost me.

PC_IN_CALL_DUMMY() returns non-zero if the PC is in a ``call dummy'' 
(any call dummy).  Having multiple call dummies at the same address is 
normal (as with AT_ENTRY).

Andrew