[RFC] Saving the latest errno from syscalls.

[Jung-uk Kim]

On Thursday 11 March 2010 04:55 pm, Marcel Moolenaar wrote:
> On Mar 11, 2010, at 1:24 PM, Jung-uk Kim wrote:
> > While I was debugging syscalls, I found a very useful field in
> > struct thread, td_errno.  It seems it was added for dtrace but it
> > is only populated on amd64 and i386.  Is the attached patch
> > acceptable for maintainers of other platforms?
>
> Isn't it better to do it in cpu_set_syscall_retval()?
> That way you catch all cases, plus you can save the
> translated error as well...

I just took amd64/i386 as an example and I was not sure whether it was 
meant to store translated error or not.  Does anyone with DTrace 
internal knowledge answer the question?

Jung-uk Kim