Re: [Qemu-devel] Support for NetLogic XLP Processors

[Leon Alrae <leon.alrae@imgtec.com>]

Hi Duarte,

On 25/03/2015 14:20, Duarte Silva wrote:
> On Wednesday 25 March 2015 13:13:14 James Hogan wrote:
>> Hi Duarte,
>>
>> On 22/03/15 11:13, Duarte Silva wrote:
>>> Hi guys,
>>>
>>> I have been struggling to get some binaries compiled for NetLogic XLP
>>> processor to run under QEMU. I have tried a bunch of things (most going
>>> back and forth) and always get the following error message:
>>>
>>> qemu: uncaught target signal 4 (Illegal instruction) - core dumped
>>> Illegal instruction
>>>
>>> I tried to debug it using GDB but to no avail. Does anybody have ideas?
>>> I'm
>>> running QEMU 2.2.1.
>>
>> It sounds like the program had an instruction that QEMU doesn't
>> recognise, or doesn't think should be allowed on the current CPU which
>> you've set with -cpu. You might be able to find out what that
>> instruction is by putting this on your qemu command line:
>>
>>  -singlestep -d in_asm
> Hi James,
> 
> thanks for the help :) I have tried with all the CPU's available. None of them 
> worked, so I just leave it as undefined. It seems the offending instruction is 
> "udi4".
> 
> (...)
> IN: 
> 0x765d1fa4:  udi4       a0,v0,zero,0x0

According to this line you are trying to use MIPS32 CPU whereas I
presume you would like MIPS64R2? Please try 5KEf CPU for example which
is available in qemu-mips64 and qemu-mips64el QEMU binaries for big and
little endian respectively.

Leon