linux-kernel - Re: [RFC PATCH 8/8] ARM: vmlinux.lds: Setup correct entry point to physical address

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Message-ID: <4FDF14E5.8080003@monstr.eu>
Date:	Mon, 18 Jun 2012 13:45:41 +0200
From:	Michal Simek <monstr@...str.eu>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	linux-kernel@...r.kernel.org, Marc Zyngier <marc.zyngier@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Will Deacon <will.deacon@....com>,
	Rob Herring <rob.herring@...xeda.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Peter Crosthwaite <peter.crosthwaite@...alogix.com>
Subject: Re: [RFC PATCH 8/8] ARM: vmlinux.lds: Setup correct entry point to
 physical address

On 06/18/2012 01:37 PM, Russell King - ARM Linux wrote:
> On Mon, Jun 18, 2012 at 01:30:11PM +0200, Michal Simek wrote:
>> linker script setups entry point to virtual address.
>>
>> Signed-off-by: Michal Simek<monstr@...str.eu>
>>
>> ---
>> Not sure what is the reason to setup entry point to virtual address.
>> ---
>>   arch/arm/kernel/vmlinux.lds.S |    4 +++-
>>   1 files changed, 3 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
>> index b996bc0..de43b01 100644
>> --- a/arch/arm/kernel/vmlinux.lds.S
>> +++ b/arch/arm/kernel/vmlinux.lds.S
>> @@ -39,7 +39,7 @@
>>   #endif
>>
>>   OUTPUT_ARCH(arm)
>> -ENTRY(stext)
>> +ENTRY(arm_start)
>
> stext etc better stay as the virtual address through this change.  The
> kernel makes use of all stext/etext etc symbols as virtual addresses.

I am not changing stext to physical address. Just elf entry point.
What's it reason to have entry point in virtual address space?

Thanks,
Michal


-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
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