Re: [lwip-users] Xilinx PowerPC receive udp messages

[Pedro Alves]

Peter Kampmann wrote:
> Pedro Alves-6 wrote:
>
> > A few ideas:
> >
> > 1)
> >
> > You wrapped this? :
> > > XIntc_RegisterHandler(XPAR_OPB_INTC_0_BASEADDR,
> > >                        XPAR_OPB_INTC_0_ETHERNET_MAC_IP2INTC_IRPT_INTR,
> > >                        (XInterruptHandler)XEmac_IntrHandlerFifo,
> > >                         xemacif_ptr->instance_ptr);
> >
> > or the declaration of XEmac_IntrHandlerFifo?
>
>
> I wrapped the file that includes the above call XIntc_RegisterHandler(..)
> but that did not help.
> All files in lwip and the xilinx emac seem to have the 
>
> #ifdef __cplusplus
>  extern "C" { ...
>
> around their headers. 
>
>
> Pedro Alves-6 wrote:
>
> > You need to wrap XEmac_IntrHandlerFifo.


> > No idea what the function looks like, but probably like this?
> > extern "C" void XEmac_IntrHandlerFifo(void*);
> >
> > 2)
> > Is the function really defined?
> > Try checking with the map file, if you have one,
> > or with something equivalent of nm or objdump.
>
>
> The function is defined, when I use Ctrl+clicking onto XEmac_IntrHandlerFifo
> the Platform Studio SDK points me to the function, which is located in
> xemac.c. 
> But the linker does not find it ...

I have no idea what this file is, I never developed with Xilinx stuff.
There are probably others that can give you move advice, but:

- Could it be the other way around? That is, XEmac_IntrHandlerFifo has
c++ mangled signature, so you shouldn't extern "C" it?
- Is that file (xemac.c) part of some lib you need to reference in your
project somewhere?
- If not, is that file being compiled/linked?

Hope that helps,

Cheers,
Pedro Alves

P.S.:
How did you know I come from a royal line and my real last name
is "Alves 6th" :)