Re: [uml-user] [TRIVIAL PATCH 16/26] x86: Convert print_symbol to %pSR

[H. P. A. <hp...@zy...>]

On 12/13/2012 11:05 AM, Borislav Petkov wrote:
>
> Ok, I grok it now. So, in most cases, mce.ip comes from pt_regs.ip which
> is unsigned long so we're fine for both 32- and 64-bit. There's only the
> case with precise RIP reporting where we get the rip from an MSR but
> even then, it should be 4 bytes on 32-bit since our addresses there are
> 4 bytes.
>
> So, actually struct mce should've had ->ip defined as an unsigned long
> from the very beginning. But we can't change that now because this
> struct is shared with userspace :(
>

Good thing, then,. otherwise we'd have a compat headache.

	-hpa
-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.