linux-kernel - Re: [git pull] x86 updates

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Message-ID: <47A8D82A.8080704@zytor.com>
Date:	Tue, 05 Feb 2008 13:42:02 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Sam Ravnborg <sam@...nborg.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [git pull] x86 updates

Linus Torvalds wrote:
> 
> Well, the real question is "what are the defaults"
> 

Well, I guess my point was that we shouldn't rely on the defaults.

>> By default:
>>
>> .bss 	is (aw,nobits).
>> .data 	is (aw,progbits).
>> .rodata	is (a,progbits).
>> .text	is (ax,progbits).
> 
> But what about something like ".init.data"?
> 
> I'd assume the defaults for unrecognized segments would have to be 
> something sane like (aw,progbits) (ie my patch shouldn't make any 
> difference), but where do we find that out?

The defaults are undocumented, and thus could change from one binutils 
version to another.  Experimentally, with 
binutils-2.17.50.0.18-1.x86_64, a section named ".init.data" get 
("",@progbits) as the default attributes.

	-hpa
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