Re: [Qemu-devel] [PATCH] linux-user: elfload: Still use TARGET_PAGE_SIZE for i386 guest

[gchen gchen]

On 2015年08月12日 15:59, gchen gchen wrote:
> On 2015年08月12日 14:45, Richard Henderson wrote:
>> On 08/11/2015 11:03 PM, gchen gchen wrote:
>>> Under Alpha host, for ubuntu12.04.5 i386 guest, it will cause failure:
>>> "Invalid ELF image for this architecture".
>>>
>>> The related issue commit is "a70daba linux-user: Tell guest about big
>>> host page sizes".
>>>
>>> Signed-off-by: Chen Gang<address@hidden>
>>> ---
>>>   linux-user/elfload.c | 4 ++++
>>>   1 file changed, 4 insertions(+)
>>
>> Nack.  There's 99 problems with host page size> guest page size.  This
>> solves none of them, and in the hackiest way possible.
>>
>
> Under alpha virtual machine, if set i386 guest page size 8KB, it will
> cause failure directly (any dynamically linked binaries can not work).
>
> This fix can let i386 bash/cp/vi/ls run under alpha virtual machine,
> although there maybe be many other issues (which I did not meet, now).
>
> Do you have any other ideas for solving this issue?  e.g. can we rebuild
> all i386 programs with segment alignment to 8KB? I am not quite sure,
> but some i386 programs (which are interested in) have no source code!
> :-(.
>

By the way, the patches about the alpha are my current work, I can do
it during my work time, it will have no any negative effect with my
tilegx linux-user development in my free time. :-)

One of my current work contents are: "run ubuntu12.04.5 (no graphic)
under alpha virtual machine, and run wine under ubuntu12.04.5 i386
guest under ubuntu alpha vm, and wine will run Win32 graphic programs".

 - I want to x86_64 laptop run Alpha linux-user run i386 linux-user run
   wine run Win32 graphic programs. I guess, I need build X libs under
   ubuntu Alpha vm (which nographic) -- use them for alpha linux-user.

 - At present, x86_64 laptop run arm linux-user run i386 linux-user run
   wine run Windows i386 graphic programs are OK, the performance is
   acceptable! the qemu code keeps no touch -- our qemu is very good!!!.


Welcome any ideas, suggestions and completions.

Thanks.
--
Chen Gang

Open, share, and attitude like air, water, and life which God blessed