Re: [Qemu-devel] [PATCH][RFC] elf loader: use the virtual address

[Aurelien Jarno]

Laurent Desnogues a écrit :
> On Fri, Jan 9, 2009 at 4:47 PM, Aurelien Jarno <address@hidden> wrote:
>> Most Linux kernels have their physical address corresponding to they
>> virtual address in the ELF header. This is however not true anymore for
>> the PowerPC kernels (>= 2.6.25).
>>
>> For PowerPC, the kernel needs to be started with address translation
>> enabled (that's even true for the firmware), and thus the kernel loaded
>> at the virtual address.
>>
>> As all the other kernels/bios I have looked have the same virtual and
>> physical address, I don't think it will break other targets. This is
>> what is done in the patch below. Alternatively, we can add a new
>> argument to the load_elf functions, to select between virtual and
>> physical load address.
>>
>> Any opinon?
> 
> I wonder if some platforms don't use the address_offset parameter
> to simulate that behaviour.

PowerPC already does that. The offset is relative to the load address,
so it should still be read correctly.

> Anyway wouldn't a parameter be cleaner and allow more flexibility?
> 

Maybe that's what I am going to implement.

-- 
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