From: Richard Henderson <rth@redhat.com>
To: yunfeng zhang <zyf.zeroos@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: No .got section in ELF
Date: Tue, 24 Nov 2009 17:10:00 -0000 [thread overview]
Message-ID: <4B0C136C.9090303@redhat.com> (raw)
In-Reply-To: <4df04b840911231758md5a545el2d417b663af1647f@mail.gmail.com>
On 11/23/2009 05:58 PM, yunfeng zhang wrote:
> next:
> pop %ebx //<< A.
> ...
> movl new_offset(%ebx), %eax //<< B. load global variable foo to eax.
> ...
> .global foo //<< C.
> OK!, to ld, offsetof(C - A) is const...
Your premise is wrong right there. C-A is *not* a constant. That's why
we used a load from memory. If it had been a constant then B would have
been:
leal foo@GOTOFF(%ebx), %eax
r~
next prev parent reply other threads:[~2009-11-24 17:10 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 [this message]
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
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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