From: George Michaelson <ggm@apnic.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] dhog the corruptor!
Date: Wed, 14 Nov 2001 08:59:29 +1000 [thread overview]
Message-ID: <24453.1005692369@apnic.net> (raw)
In-Reply-To: Message from anothy@cosym.net of "Tue, 13 Nov 2001 17:53:45 EST." <20011113225401.E945C199B9@mail.cse.psu.edu>
One thing I've often wondered about is why dynamic linking methods leave
the indirect call around. I discussed this with a smarter person and he
seemed to think the cost of walking the machinecode to find out the base
call, and write in the binary the direct references was too high.
But surely for inner-loop code, or critical frequent call code, it would
be worth avoiding call(indirect-lookup(real-function-name(args...))) all
the time?
So would a plan9 with dynamic linkage live with stacks of indirection or
does it straight-path to the real code?
cheers
-George
--
George Michaelson | APNIC
Email: ggm@apnic.net | PO Box 2131 Milton QLD 4064
Phone: +61 7 3367 0490 | Australia
Fax: +61 7 3367 0482 | http://www.apnic.net
next prev parent reply other threads:[~2001-11-13 22:59 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-13 22:53 anothy
2001-11-13 22:59 ` George Michaelson [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-11-14 9:26 forsyth
2001-11-16 11:56 ` Boyd Roberts
2001-11-13 23:54 forsyth
2001-11-13 23:53 David Gordon Hogan
2001-11-13 23:50 David Gordon Hogan
2001-11-14 0:34 ` Quinn Dunkan
2001-11-14 4:46 ` Lucio De Re
2001-11-16 11:52 ` Boyd Roberts
2001-11-13 23:04 David Gordon Hogan
2001-11-13 23:28 ` Quinn Dunkan
2001-11-13 23:38 ` Chris Hollis-Locke
2001-11-13 22:32 David Gordon Hogan
2001-11-13 22:09 anothy
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