Date: Fri, 6 Apr 2007 14:43:13 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: freebsd-current@FreeBSD.org Cc: Roman Divacky <rdivacky@FreeBSD.org>, Norikatsu Shigemura <nork@FreeBSD.org> Subject: Re: Cannot mount linprocfs by unresolving sysvs?m symbols Message-ID: <200704061443.15071.jkim@FreeBSD.org> In-Reply-To: <20070406181138.GA90738@freebsd.org> References: <20070407023855.ede13b76.nork@FreeBSD.org> <200704061407.35340.jkim@FreeBSD.org> <20070406181138.GA90738@freebsd.org>
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On Friday 06 April 2007 02:11 pm, Roman Divacky wrote:
> > > is there a way to do this nicely?
> >
> > Probably we can improve kernel linker to do better job. ;-) I
> > mean, load all dependencies before look up symbols.
>
> thats not what I mean.. what I want is something like
>
> if (function_present(foo))
> x = foo();
> else
> x = SAFE_VALUE;
>
> use x somehow;
>
> so we don't have to have all modules loaded etc. the same could be
> done for some syscalls, imagine
>
> linux_foo(params)
> {
> if (function_present(foo))
> return foo(params);
> else
> return ENOSYS;
> }
>
> I like this better then loading all possible modules.
I know what you meant but it is more heavier than what we have now.
If you insist, you can do something like linux_ipc.c. Check out
linux_msgctl() and linux_semctl(). Module presence check is easy.
Jung-uk Kim
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