[OpenBIOS] [PATCH] ppc: force target CPU

[Laurent Vivier]

Le 25/01/2016 15:48, Programmingkid a écrit :
> 
> On Jan 25, 2016, at 9:31 AM, Laurent Vivier wrote:
> 
>>
>>
>> Le 22/01/2016 16:26, Mark Cave-Ayland a écrit :
>>> On 22/01/16 15:05, Andreas Färber wrote:
>>>
>>>> Am 22.01.2016 um 14:59 schrieb Mark Cave-Ayland:
>>>>> On 20/01/16 08:33, Laurent Vivier wrote:
>>>>>> Le 19/01/2016 21:33, Mark Cave-Ayland a écrit :
>>>>>>> Great! If we go with Segher's suggestion for 64-bit then we end up with
>>>>>>> this:
>>>>>>>
>>>>>>> 32-bit: -mcpu=604
>>>>>>> 64-bit: -mcpu=970 -mno-altivec
>>>>>>
>>>>>> I think you can use "-mcpu=power4" here, this is the old default value
>>>>>> for gcc.
>>>>>
>>>>> It seems they are effectively the same, so I don't have any strong
>>>>> preference either way.
>>>>
>>>> I prefer Mark's explicit variant, ideally with some explanatory comment.
>>>
>>> Thanks Andreas! Laurent, can you resubmit accordingly with a brief
>>> comment for each summarising why these flags have been chosen?
>>
>> I can, but I'm not able to build openbios for target ppc64 on ppc64 host.
>>
>> Is this normal ?
> 
> It definitely shouldn't be.
> 
>>
>> $ ./config/scripts/switch-arch ppc64
>> Configuring OpenBIOS on ppc64 for ppc64
>> Initializing build tree /home/laurent/Projects/openbios/obj-ppc64...ok.
>> Creating target config.mak...ok.
>> Creating target rules.mak...ok.
>> Creating config files...ok.
>> [laurent at pmacg5-1 openbios]$ make
>> Building OpenBIOS for ppc64
>> Building...
>> error:
>> HOSTCC host/kernel/dict.o
>> HOSTCC host/kernel/bootstrap.o
>> HOSTCC host/kernel/forth.o
>> HOSTCC host/kernel/stack.o
>> HOSTCC forthstrap
>>  GEN   bootstrap.dict
>> panic: segmentation violation at 0x87a1062c
>> dict=0x3fff87a10010 here=0x3fff87a10638(dict+0x628) pc=0x0(dict+0x785efff0)
>> dstackcnt=0 rstackcnt=0 instruction=deadbeef
>> dstack: 0x0
>> rstack: 0x0
>> Writing dictionary core file
>> rules.mak:69: recipe for target 'bootstrap.dict' failed
>> make[1]: *** [bootstrap.dict] Error 1
>> make[1]: Leaving directory '/home/laurent/Projects/openbios/obj-ppc64'
>> Makefile:19: recipe for target 'build' failed
>> make: *** [build] Error 1
> 
> What operating system are you using to build OpenBIOS on? 

Fedora23/ppc64

> Is your operating system 32 bit or 64 bit?

64bit. but I've tested on debian ppc 32bit and it fails for another reason:

  CC    target/arch/ppc/qemu/init.o
/home/laurent/Projects/openbios/arch/ppc/qemu/init.c: In function ‘adler32’:
/home/laurent/Projects/openbios/arch/ppc/qemu/init.c:705:17: error: cast
to pointer from integer of different size [-Werror=int-to-pointer-cast]
     char *buf = (char *)POP();
                 ^
cc1: all warnings being treated as errors

> What version of GCC are you using? 
> 

64bit host: gcc (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4)
32bit host: gcc (Debian 4.9.2-10) 4.9.2

Laurent