Subject: Re: cpufunc.h
To: None <Richard.Earnshaw@buzzard.freeserve.co.uk>
From: John Fremlin <firstname.lastname@example.org>
Date: 05/31/2001 14:56:57
Richard Earnshaw <email@example.com> writes:
> > > Then the current code setcpsr.S code is screwed because set_cpsr can
> > > clobber "r8","r9","r10","r11","r12","r13","r14".
> > This is only true if it's ever used to change mode, which I'm fairly sure
> > it isn't.
> And it certainly shouldn't ever be used to change out of FIQ mode
> (or we've got the OS design wrong).
Would you prefer it to clobber fewer registers and document that you
may not switch from FIQ mode? I didn't see any harm in clobbering more
registers . . .
> PS. You are probably missing a clobber of CC as well.
Whoops. Yes. Fixed now.