Re: [Qemu-devel] [Qemu-ppc] [PATCH for-2.0 2/2] ohw: let the right reset entry point 0xfff00100 jump to the currently wrong entry point (0xfffffffc)

[Alexander Graf]

> Am 02.04.2014 um 07:23 schrieb Hervé Poussineau <address@hidden>:
> 
> Le mer. 02 avril 2014 07:14:48 CEST, Alexander Graf a écrit :
>> 
>> 
>>> Am 01.04.2014 um 23:18 schrieb Hervé Poussineau <address@hidden>:
>>> 
>>> This is easier to do this than to copy the code from the wrong entry point 
>>> to the right entry point.
>>> 
>>> Signed-off-by: Hervé Poussineau <address@hidden>
>>> ---
>>> src/vectors.S |    7 ++++++-
>>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>> 
>>> diff --git a/src/vectors.S b/src/vectors.S
>>> index 691d568..05cd1d9 100644
>>> --- a/src/vectors.S
>>> +++ b/src/vectors.S
>>> @@ -121,7 +121,12 @@ excp_##entry##:                                        
>>>    ; \
>>> 
>>>         /* Exception vectors */
>>>         /* Reset exception */
>>> -        EXCP_BUG(0100)                                    ;
>>> +.org 0x0100
>>> +excp_0100:
>>> +        lis r3,0
>>> +        addi r3,r3,-4
>>> +        mtlr r3
>>> +        blr
>> 
>> Doesn't ba -4 work?
> 
> Yes, "ba -4" also works, I just tested it.

It's a lot cleaner because it doesn't modify registers. I don't think this is 
2.0 material either - we're in the "critical bug fixes only" phase already, so 
no need to rush :).

Alex

> 
> Hervé
>