From: Mike Frysinger <vapier@gentoo.org>
To: gentoo-dev@lists.gentoo.org
Cc: "Anthony G. Basile" <blueness@gentoo.org>
Subject: Re: [gentoo-dev] Can we get PIE on all SUID binaries by default, por favor?
Date: Sun, 29 Jan 2012 14:14:27 -0500 [thread overview]
Message-ID: <201201291414.27968.vapier@gentoo.org> (raw)
In-Reply-To: <4F23E993.5050701@gentoo.org>
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On Saturday 28 January 2012 07:26:59 Anthony G. Basile wrote:
> I've run nbench on two amd64 systems both running the same kernel
> vanilla-3.2.2.
i don't think nbench is a good benchmark for this as it isn't really testing
what you think it's testing. it's very good at validating math support in the
ISA/ABI, optimized compiler output, and supplementary math implementations in
libgcc. PIE vs non-PIE will still be able to multiply/divide in pretty much
the same amount of time.
> So at least on amd64, I don't think that performance is ever an issue.
yes, most likely on systems where the PIC has hardware support in the ISA, the
performance hit on PIE is typically low.
> I have yet to look at x86.
pretty sure this is going to be much more palpable.
-mike
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next prev parent reply other threads:[~2012-01-29 19:15 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-23 19:08 [gentoo-dev] Can we get PIE on all SUID binaries by default, por favor? Jason A. Donenfeld
2012-01-23 19:22 ` [gentoo-dev] " Diego Elio Pettenò
2012-01-23 19:26 ` Jason A. Donenfeld
2012-01-23 19:37 ` Diego Elio Pettenò
2012-01-23 19:40 ` Jason A. Donenfeld
2012-01-23 19:51 ` Mike Gilbert
2012-01-23 19:57 ` Jason A. Donenfeld
2012-01-23 20:00 ` Mike Gilbert
2012-01-23 20:09 ` Sven Vermeulen
2012-01-23 20:12 ` Francesco Riosa
2012-01-23 22:18 ` Zac Medico
2012-01-24 7:57 ` Jason A. Donenfeld
2012-01-24 5:56 ` Mike Frysinger
2012-01-23 20:47 ` Agostino Sarubbo
2012-01-23 19:56 ` Diego Elio Pettenò
2012-01-23 20:48 ` Markos Chandras
2012-01-24 5:50 ` Mike Frysinger
2012-01-24 5:58 ` [gentoo-dev] " Mike Frysinger
2012-01-26 16:55 ` Jason A. Donenfeld
2012-01-27 19:02 ` Jason A. Donenfeld
2012-01-27 19:39 ` "Paweł Hajdan, Jr."
2012-01-27 19:45 ` Fabian Groffen
2012-01-27 20:13 ` "Paweł Hajdan, Jr."
2012-01-27 20:33 ` Rich Freeman
2012-01-27 21:05 ` Jason A. Donenfeld
2012-01-28 0:12 ` Mike Frysinger
2012-01-28 5:12 ` Jason A. Donenfeld
2012-01-28 12:26 ` Anthony G. Basile
2012-01-29 19:14 ` Mike Frysinger [this message]
2012-02-01 0:58 ` Anthony G. Basile
2012-02-01 17:33 ` Matthew Thode
2012-02-01 20:08 ` Mike Frysinger
2012-01-27 19:48 ` Mike Frysinger
2012-01-27 21:02 ` Jason A. Donenfeld
2012-01-28 0:01 ` Anthony G. Basile
2012-01-28 5:07 ` Jason A. Donenfeld
2012-01-29 19:14 ` Mike Frysinger
2012-01-27 19:42 ` Mike Frysinger
2012-01-27 19:43 ` Mike Frysinger
2012-01-27 21:04 ` Jason A. Donenfeld
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