ARM: pxa/corgi: armv5te kernel 4.12 fails to decompress compiled with gcc7

[Petr Cvek]

Hi,
I wasn't compiling GCC takes me few hours and I have no idea where to 
start (don't have JTAG on my PXA machine, and gdb does show anything 
useful). I wanted to look at that in the summer, but I've had other work.

I suggest you to compile kernel with an older GCC. Maybe even the whole 
OS (busybox) with a working one but it seems that the failures in 
standalone application have a really low occurences of bugs. It is 
possible the bug is somewhere in libc etc.

Petr

Dne 14.10.2017 v 23:50 Aaro Koskinen napsal(a):
> Hi,
> 
> On Sat, Sep 02, 2017 at 11:50:55PM +0200, Andrea Adami wrote:
>> On Thu, Jul 20, 2017 at 8:57 AM, Robert Jarzmik <robert.jarzmik at free.fr> wrote:
>>> Andrea Adami <andrea.adami at gmail.com> writes:
>>> I have the same report on userspace side on buildroot from Petr [1], which
>>> triggers endless segfaults in userspace (init) with gcc7 while everything is
>>> fine with gcc6. I have confirmation on my test farm the problem happens as well.
>>>
>>> Since debugging in userspace is far easier, I would suggest attacking the debug
>>> with Petr on userspace side, and once sorted out, come back to kernel side.
>>
>> sorry for the delay, I was awaiting to test gcc 7.2 and binutils 2.29.
>> Unfortunately, same issue: XZ-compressed data is corrupt - System Halted.
> 
> Has anyone been able to debug this further? It seems there are also issues
> on iop32x/n2100 with GCC 7.2 and binutils 2.29.1 - early boot hangs silently
> and I cannot get earlyprintk to work. Compiling with GCC 6.4.0 it's OK.
> 
> A.
>