[Buildroot] buildroot-2012.11 openssh: Bad trap error

[Jan Schunke]

On 06.12.2012 15:56, Gustavo Zacarias wrote:
> On 12/06/2012 06:59 AM, Jan Schunke wrote:
> 
>> I am using buildroot-2012.11 on Powerpc 440 (Xilinx Virtex5) without FPU
>>
>> when I boot I get:
>>
>> ...
>> Starting network...
>> Generating RSA Key...
>> [    5.527467] Bad trap at PC: 48063f20, SR: 2d000, vector=2010
>> Trace/breakpoint trap
>> Generating RSA Key...
>> [    5.572257] Bad trap at PC: 48063f20, SR: 2d000, vector=2010
>> Trace/breakpoint trap
>> Generating DSA Key...
>> THIS CAN TAKE A MINUTE OR TWO DEPENDING ON YOUR PROCESSOR!
>>
>> [    5.594576] Bad trap at PC: 48063f20, SR: 2d000, vector=2010
>> Trace/breakpoint trap
>> Generating ECDSA Key...
>> THIS CAN TAKE A MINUTE OR TWO DEPENDING ON YOUR PROCESSOR!
>>
>> [    5.615732] Bad trap at PC: 48063f20, SR: 2d000, vector=2010
>> Trace/breakpoint trap
>> Starting sshd: [    5.940254] Bad trap at PC: 48063f20, SR: 2d000,
>> vector=2010
>> Trace/breakpoint trap
>> OK
>> ...
>>
>> I can achieve a similar behaviour if I compile a program with -mhard-float.
>>
>> So I guess for one of the following packages softfloat is not set correctly.
>>
>> Maybe someone more competent can take a look into this.
>>
>> When I roll back
>>
>> openssh from 6.1p1  to 6.0p1
>> openssl from 1.0.1c to 1.0.0j
>> zlib    from 1.27   to 1.26
>>
>> everything is fine.
> 
> Hi.
> Ok, i managed to build a similar scenario as yours under qemu
> (virtex-ml507 emulation).
> With similar toolchain/versions/options i'm unable to hit the issue.
> It's most likely that qemu is being too optimistic in the CPU emulation
> department (handling the invalid opcodes for a 440 core).
> Did you try switching just a single version?
> I'm betting on openssl since it's got powerpc-specific optimizations
> whereas zlib and openssh don't.
> You could also try disabling the powerpc optimizations in
> package/openssl/openssl.mk, just remove the block from ifeq
> ($(ARCH),powerpc) to the first endif (3 lines).
> And let us know :)
> Regards.

Hi,

I updated all packages back to the newer version and followed your
suggestion:

> You could also try disabling the powerpc optimizations in
> package/openssl/openssl.mk, just remove the block from ifeq
> ($(ARCH),powerpc) to the first endif (3 lines).

and everything is ok, too. Can we just check if $ARCH is powerpc AND
BR2_SOFT_FLOAT is set to yes in package/openssl/openssl.mk?

Regards
Jan

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Jan-Hendrik Schunke
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