MD_FALLBACK_FRAME_STATE_FOR and floating point...

[David Daney]

A couple of days ago I checked in MD_FALLBACK_FRAME_STATE_FOR for 
mips*-linux.

Then I got to thinking, this thing restores all the general purpose 
registers, but no "special" registers like floating point and the 
high/low registers.  If my signal handlers did any floating point I 
think I would be screwed.  Well the cpu I am using uses software 
floating point so I personally would not be screwed, it would be 
everyone else.

With this in mind I looked at MD_FALLBACK_FRAME_STATE_FOR for 
i386-linux.  I cannot see that it restores floading point registers either.

Q1:  Am I missing something?

Q2:  Is there some unwritten rule that you should not use floating point 
in signal handlers?

David Daney.