WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] [PATCH] caml-stubdom: fix "red zone" bug

Ian Campbell writes ("Re: [Xen-devel] [PATCH] caml-stubdom: fix "red zone" 
bug"):
> A kernel (or anything which runs only in ring 0) generally cannot use
> red-zoning on itself because there is no stack switch when taking an
> exception/interrupt/etc from ring 0 and so the hardware has already
> trashed the red-zone before the software would get to do any
> fixup/obeying etc.

Thanks for the explanation.  It hadn't occurred to me that they'd
write something into the ABI which you can't implement when running in
a kernel ...

I've applied Patrick's patch.

Ian.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel