[kaffe] StrongARM problems

[Dalibor Topic]

Dalibor Topic wrote:
> Dalibor Topic wrote:
> 
>> Guilhem Lavaux wrote:
>>
>>>
>>>>
>>>> Hello,
>>>
>>>
>>>
>>>
>>> Hi Fabien,
>>>
>>>>
>>>> Me too I cannot compile HEAD, I have the same errors.
>>>>
>>>
>>> Dalibor was on the track for this bug but I don't know what he is 
>>> doing now about it. But here is the right fix I think...
>>
>>
>>
>> I think the problem comes from libc's internal structure  
>> (k-sigcontext) and the kernel includes disagreeing on the sigonctext 
>> struct's contents. libc uses a union of sigcontext structs (v20, v21) 
>> to be able to extract the 'right' sigcontextinfo from the kernel 
>> sigcontext. Of course, as the kernel sigcontext does not really have 
>> such a union inside the struct, things break when we pass sigcontext 
>> as a k_sigcontext.
>>
>> I think the right way to fix that is to find out what sigcontext 
>> struct looked like on 2.0 kernels for arm, and to check what it looks 
>> like on current arm kernels, to add a configure.ac check for some 
>> struct element that's only present in one of them, and to use that to 
>> fix our sigcontextinfo.h to remove the v2x union ideantifiers to 
>> access the right struct elements when the above mentioned struct 
>> element is present or not.
>>
>> I have to start downloading some kernels, I guess ;)
> 
> 
> done that, and talked on IRC with some debian-arm developers and Kero, 
> and it seems that noone is using 2.0.x on arm, these days. So in order 
> to make maintenance easier, I propose to remove the support for that, 
> and simply make it work with the current kernels. Unfortunately, 
> handhelds.org seems down, and HP's testdrive seems to have taken offline 
> their arm machines, so I don't have a box to test on atm.

I've built a cross-compiler toolchain for arm-unknown-linux-gnu using 
Dan Kegel's great crosstools scripts, and applied a few patches to the 
CVS to make it buld with gcc 3.4.0. The v20/v21 issue is now fixed, and 
I've removed some bogus (according to an IRC conversation with 
OpenEmbedded developers) clobbering constraints from sysdepCallMethod.

I still don't have an arm-linux box to test, though :( I'll look into 
scratchbox tomorrow to see if I can set something up using qemu.

cheers,
dalibor topic