Re: Mostly static binaries with crunchgen

On Tuesday 20 December 2005 04:31 pm, Ceri Davies wrote:
> On Tue, Dec 20, 2005 at 01:43:58PM -0500, John Baldwin wrote:
> > On Tuesday 20 December 2005 10:58 am, Ceri Davies wrote:
> > > On Tue, Dec 20, 2005 at 10:29:27AM -0500, John Baldwin wrote:
> > > > The other concern is does this force the entire crunch to require a
> > > > working rtld now? If so, that would mean that this wouldn't be
> > > > appropriate for something such as /rescue. If there were a way to
> > > > statically link rtld into the crunch itself that would probably be
> > > > ideal, but I'm not sure that is possible.
> > >
> > > No, just the dynamic bits require rtld.
> >
> > So you can still run /foo without rtld being present if foo doesn't need
> > dlopen, etc.? It looks like you link the crunch with -o dynamic, so
> > isn't the kernel going to complain when you try to exec it that it can't
> > find rtld if rtld is missing? (Think about /rescue if your rtld is hosed
> > and/or missing.)
>
> Sorry, you're correct of course. It's still useful in Adrian's
> environment at least (because he puts rtld on an MFS).

One workaround for this case would be to have two crunches, one for the
pure-static stuff and one for the dynamic-using stuff. Alternatively, if you
had a way to statically link the rtld functions into the crunch you could
still use just one crunch. I just want to make sure we don't go turning this
on for /rescue since that needs to work if rtld is hosed (unless we go the
route of two crunches).

--
John Baldwin <jhb@xxxxxxxxxxx> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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