Re: [PATCH 2.5] clear USEDFPU in copy_thread

[Juan Quintela <quintela@mandrakesoft.com>]

>>>>> "jun" == Jun Sun <jsun@mvista.com> writes:

Hi

jun> Even if you don't have it cleared in start_thread(), things
jun> should be generally OK.  You will have some dirty FPU content
jun> instead of a all-zero one when you start a new program.  But then
jun> since all sane program should assign register values before they
jun> first time use them, so this bug should be well hidden.

I don't remind the exact details, but the problem appears to be the
security implications, you can see last values of previous process.

Yes, I still have to find a way where that is useful, but ...

Later, Juan.

-- 
In theory, practice and theory are the same, but in practice they 
are different -- Larry McVoy