From: Yinghai Lu <yinghai@kernel.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Ingo Molnar <mingo@elte.hu>,
"Eric W. Biederman" <ebiederm@xmission.com>,
the arch/x86 maintainers <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Absolute symbols in vmlinux_64.lds.S
Date: Mon, 09 Mar 2009 22:32:25 -0700 [thread overview]
Message-ID: <49B5FB69.2020909@kernel.org> (raw)
In-Reply-To: <3k2vgeyfr0tl8gef3ia8o9rh.1236659870536@email.android.com>
Jeremy Fitzhardinge wrote:
>
> Yinghai Lu <yinghai@kernel.org> wrote:
>
>> Jeremy Fitzhardinge wrote:
>>> Why does vmlinux_64.lds.S use absolute symbols for things like
>>> __bss_start/stop:
>>>
>>> __bss_start = .; /* BSS */
>>> .bss : AT(ADDR(.bss) - LOAD_OFFSET) {
>>> *(.bss.page_aligned)
>>> *(.bss)
>>> }
>>> __bss_stop = .;
>>>
>>>
>>> vmlinux_32.lds.S puts __bss_start/stop into the .bss section itself. Is
>>> there some particular reason they need to be absolute symbols
>>> (relocation?).
>>>
>> they are the same.
>
> Do you mean it makes no difference?
Sure. System.map should tell the value after the building.
YH
next prev parent reply other threads:[~2009-03-10 5:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-10 4:37 Absolute symbols in vmlinux_64.lds.S Jeremy Fitzhardinge
2009-03-10 5:32 ` Yinghai Lu [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-03-09 23:59 Jeremy Fitzhardinge
2009-03-10 1:23 ` Yinghai Lu
2009-03-10 5:37 ` Sam Ravnborg
2009-03-10 5:49 ` Eric W. Biederman
2009-03-10 20:20 ` H. Peter Anvin
2009-03-10 21:25 ` Eric W. Biederman
2009-03-10 22:26 ` Jeremy Fitzhardinge
2009-03-10 5:57 ` Yinghai Lu
2009-03-10 11:24 ` Sam Ravnborg
2009-03-10 1:36 ` Eric W. Biederman
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