linux-kernel - Re: [PATCH] x86: fix build with older binutils and consolidate linker script

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Date:	Mon, 24 Aug 2009 08:21:23 +0100
From:	"Jan Beulich" <JBeulich@...ell.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	<mingo@...e.hu>, <tglx@...utronix.de>, <sam@...nborg.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: fix build with older binutils and	
	 consolidate	 linker script

>>> "H. Peter Anvin" <hpa@...or.com> 24.08.09 09:13 >>>
>On 08/23/2009 11:55 PM, Jan Beulich wrote:
>>>>> "H. Peter Anvin" <hpa@...or.com> 21.08.09 22:23 >>>
>>> On 08/18/2009 08:51 AM, Jan Beulich wrote:
>>>>  
>>>>  #define VSYSCALL_ADDR (-10*1024*1024)
>>>> -#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data.read_mostly) + \
>>>> -                            SIZEOF(.data.read_mostly) + 4095) & ~(4095))
>>>> -#define VSYSCALL_VIRT_ADDR ((ADDR(.data.read_mostly) + \
>>>> -                            SIZEOF(.data.read_mostly) + 4095) & ~(4095))
>>>> +#define VSYSCALL_PHYS_ADDR ((LOADADDR(.data) + SIZEOF(.data) + \
>>>> +                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
>>>> +#define VSYSCALL_VIRT_ADDR ((ADDR(.data) + SIZEOF(.data) + \
>>>> +                            PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
>>>>  
>>> I'm missing something with this chunk... could you please explain?
>> 
>> There are two changes here: One is the adjustment to properly use the
>> new preceding section's name, and the other is to replace the hard coded
>> 4095 by PAGE_SIZE-1.
>> 
>
>Hm.  I'm wondering if an actual (NOLOAD)/@...its section wouldn't be
>better...

For what? The immediately preceding section?

In any case, it would seem that this would be an independent patch on top
of mine...

Jan

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