From: Alexandre Oliva <aoliva@redhat.com>
To: yunfeng zhang <zyf.zeroos@gmail.com>
Cc: Richard Henderson <rth@redhat.com>,
gcc@gcc.gnu.org, Andrew Haley <aph@redhat.com>
Subject: Re: No .got section in ELF
Date: Fri, 27 Nov 2009 13:35:00 -0000 [thread overview]
Message-ID: <or8wdsf5u7.fsf@livre.localdomain> (raw)
In-Reply-To: <4df04b840911261818q50f3da9bs3213c1a2982278f4@mail.gmail.com> (yunfeng zhang's message of "Fri, 27 Nov 2009 10:18:10 +0800")
On Nov 27, 2009, yunfeng zhang <zyf.zeroos@gmail.com> wrote:
> The rsult is also same, you go too far.
If the g in the main program didn't preempt the definition in the
library, then something is amiss in your system.
> Here data in 0x1000 and its follower have an *exact* map to foo.so in
> disk, you need review my code, so which can bring an optimization is
> offsetof(C - A) is const. Further, everything in data/bss section has
> a fixed offset to text section.
Yes, what you're proposing is already implemented, using @GOTOFF instead
of @GOT. But we can only use @GOTOF when the symbol is nonpreemptible
and known to be defined within the same shared object.
--
Alexandre Oliva, freedom fighter http://FSFLA.org/~lxoliva/
You must be the change you wish to see in the world. -- Gandhi
Be Free! -- http://FSFLA.org/ FSF Latin America board member
Free Software Evangelist Red Hat Brazil Compiler Engineer
next prev parent reply other threads:[~2009-11-27 13:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-24 1:58 yunfeng zhang
2009-11-24 10:00 ` Andrew Haley
2009-11-24 17:10 ` Richard Henderson
2009-11-26 2:24 ` yunfeng zhang
2009-11-26 3:11 ` Richard Henderson
2009-11-26 6:04 ` yunfeng zhang
2009-11-26 7:55 ` Alexandre Oliva
2009-11-27 2:18 ` yunfeng zhang
2009-11-27 4:12 ` Dave Korn
2009-11-27 4:43 ` yunfeng zhang
2009-11-27 4:46 ` Dave Korn
2009-11-27 13:35 ` Alexandre Oliva [this message]
2009-11-30 11:10 ` Yunfeng ZHANG
2009-11-27 4:58 ` Jie Zhang
2009-11-27 6:42 ` yunfeng zhang
2009-11-27 14:16 ` Ian Lance Taylor
2009-11-27 4:51 Dmitry Gorbachev
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