Re: [Qemu-devel] Help - `flush_icache_range' MacPPC

[Alexander Graf]

On 07.02.2012, at 23:29, Brad Smith wrote:

> On 07/02/12 5:12 PM, malc wrote:
>> On Tue, 7 Feb 2012, Alexander Graf wrote:
>> 
>>> 
>>> On 07.02.2012, at 22:12, malc wrote:
>>> 
>>>> On Tue, 7 Feb 2012, Alexander Graf wrote:
>>>> 
>>>>> 
>>>>> On 07.02.2012, at 13:52, Maurizio Caloro wrote:
>>>>> 
>>>>>> Hello Together
>>>>>> Here i drive with me MiniMac G4 1.4Ghz and i try to run Qemu 1.0. i 
>>>>>> wan't run one Virt. MS Server2008 it's this realistic?.
>>>>>> 
>>>>>> Unfortunitly from the first (other) Mailinglist i don't become any 
>>>>>> Answer.
>>>>>> 
>>>>>> on a possible error recovery support, I would grateful to you.
>>>>>> Thanks and best regards
>>>>>> Mauri
>>>>>> 
>>>>>>> NetBSD powermac.G4 5.1 NetBSD 5.1 (GENERIC) #0: Sat Nov  6 17:09:11 
>>>>>>> UTC>2010  
>>>>>>> address@hidden:/home/builds/ab/netbsd-5-1->RELEASE/macppc/201011061943Z-obj/home/builds/ab/netbsd-5-1->RELEASE/src/sys/arch/macppc/compile/GENERIC
>>>>>>>  macppc
>>>>>>> 
>>>>>>> # gmake
>>>>>>> CC    i386-softmmu/memory.o
>>>>>>> LINK  i386-softmmu/qemu-system-i386
>>>>>>> ld: warning: libintl.so.0, needed by /usr/pkg/lib/libgthread-2.0.so, 
>>>>>>> may conflict with libintl.so.8
>>>>>>> tcg/tcg.o: In function `tcg_prologue_init':
>>>>>>> /usr/source/qemu-1.0/tcg/tcg.c:268: undefined reference to 
>>>>>>> `flush_icache_range'
>>>>>>> tcg/tcg.o: In function `ppc_tb_set_jmp_target':
>>>>>>> /usr/source/qemu-1.0/tcg/ppc/tcg-target.c:1291: undefined reference to 
>>>>>>> `flush_icache_range'
>>>>>>> tcg/tcg.o: In function `tcg_gen_code':
>>>>>>> /usr/source/qemu-1.0/tcg/tcg.c:2191: undefined reference to 
>>>>>>> `flush_icache_range'
>>>>> 
>>>>> I'd say your gcc is too old / buggy.
>>>> 
>>>> You probably missed the NetBSD part (anyway originally i did)
>>> 
>>> Gcc on NetBSD doesn't implement the cache flush helpers? They're just a
>>> bunch of instructions, so I don't see how that'd be target os specific.
>>> 
>> 
>> Take a look at cache-utils.c, it conditionally (depending on the host OS
>> type) tries to gigure out the cache line sizes, there's code to do that
>> on Linux, OSX, AIX and FreeBSD. I have no idea if FreeBSD method works
>> for Net/Open/Dragonfly.. so..
> 
> The FreeBSD method will not work with NetBSD. For NetBSD you have to use
> the machdep.cacheinfo sysctl MIB. For OpenBSD this is the only local patch
> we have since there is no sysctl (yet) to retrieve the cache line size.
> DragonFly has no PowerPC support.

Ah, good, since you seem to know your way around the BSDs, mind to write up a 
patch?

Alex