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Do we have anything else that maps its functionality?  I'd hate to lose it,
not that I have time to maintain it.

-=erik.


On 7/13/07, Andrew Doran <ad@netbsd.org> wrote:
>
> On Thu, Jul 12, 2007 at 09:59:27PM +0000, Christos Zoulas wrote:
> > In article <20070712202114.GY986@snowdrop.l8s.co.uk>,
> > David Laight  <david@l8s.co.uk> wrote:
> > >After much hacking, there is now only one piece of code that relies on
> the
> > >'stackgap' [1], this isn't in the compat code, but is in
> kern/krn_systrace.c.
>
> Bravo! I'll chalk that one off the SMP task list that I have been keeping.
>
> > >Anyone any thoughts on how to implement the systrace STRIOCREPLACE
> ioctl?
> > >Or is systrace just such a nasty hack it deserves to die?
> >
> > I don't see how to, without changing a lot of other code. I think
> > that the current implementation of systrace is problematic in
> > threaded programs threads can interfere and change arguments of
> > syscalls after systrace have validated them but before the kernel
> > has executed them.
>
> It also needs per-thread credentials. Most of the infrastructure to do
> that
> is there, but it's a different need to the one that the current code
> meets.
> Anyway, it has tentacles, it's unmaintained and I haven't seen of much of
> a
> user base - I'd like to see it go.
>
> Andrew
>

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Do we have anything else that maps its functionality?&nbsp; I&#39;d hate to lose it, not that I have time to maintain it.<br><br>-=erik.<br><br><br><div><span class="gmail_quote">On 7/13/07, <b class="gmail_sendername">Andrew Doran
</b> &lt;<a href="mailto:ad@netbsd.org">ad@netbsd.org</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">On Thu, Jul 12, 2007 at 09:59:27PM +0000, Christos Zoulas wrote:
<br>&gt; In article &lt;<a href="mailto:20070712202114.GY986@snowdrop.l8s.co.uk">20070712202114.GY986@snowdrop.l8s.co.uk</a>&gt;,<br>&gt; David Laight&nbsp;&nbsp;&lt;<a href="mailto:david@l8s.co.uk">david@l8s.co.uk</a>&gt; wrote:<br>
&gt; &gt;After much hacking, there is now only one piece of code that relies on the<br>&gt; &gt;&#39;stackgap&#39; [1], this isn&#39;t in the compat code, but is in kern/krn_systrace.c.<br><br>Bravo! I&#39;ll chalk that one off the SMP task list that I have been keeping.
<br><br>&gt; &gt;Anyone any thoughts on how to implement the systrace STRIOCREPLACE ioctl?<br>&gt; &gt;Or is systrace just such a nasty hack it deserves to die?<br>&gt;<br>&gt; I don&#39;t see how to, without changing a lot of other code. I think
<br>&gt; that the current implementation of systrace is problematic in<br>&gt; threaded programs threads can interfere and change arguments of<br>&gt; syscalls after systrace have validated them but before the kernel<br>&gt; has executed them.
<br><br>It also needs per-thread credentials. Most of the infrastructure to do that<br>is there, but it&#39;s a different need to the one that the current code meets.<br>Anyway, it has tentacles, it&#39;s unmaintained and I haven&#39;t seen of much of a
<br>user base - I&#39;d like to see it go.<br><br>Andrew<br></blockquote></div><br>

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