linux-kernel - Absolute symbols in vmlinux

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Date:	Mon, 09 Mar 2009 16:59:38 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Absolute symbols in vmlinux_64.lds.S

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?).

Thanks,
    J
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