Re: [linuxsh-dev] Re: bad alignment fixup

[Mitch D. <md...@po...>]

NIIBE Yutaka wrote:
> 
> Philipp Rumpf wrote:
>  > I think we have four groups of accesses we might emulate or not:
>  > 1. kernel accesses to kernel memory
>  > 2. kernel accesses to user memory
>  > 3. user accesses to user memory, using "standard" instructions
>  > 4. user accesses to user memory, using non-standard instructions
> 
> Thanks for the summary.
> 
> My opinion is we only need #1.
...
> At least, we should output warning message when handling userspace
> unaligned access.

I agree.  If there was a non-trivial body of userspace code which
did unaligned access, I would consider #3 and #4 a necessary but
evil kludge.  But we don't, and I hope we never do.  And I'd like
to make sure we never do by not supporting the emulation of userspace
unaligned instructions.  (Just do a printk and a SEGV).

Just my two cents worth.  You can collect the other 2 cents here.

  http://www.geocrawler.com/lists/3/SourceForge/3076/50/4621975/

At the time the response to this was, "it's only for kernel mode".
Now it appears it's not, and my original comments still stand.

Regards,

Mitch.