Iain Grant wrote:
>
> Russell,
>
> Thanks for the advice. We've stopped going down that route. And are now
> ignoring swap files/devices altogether.
>
> So, At the moment we have got to the following level.
>
> 1. Successfully cross-compiled a linux 2.1.132 kernel for our EBSA
> 2. Copied the netwinder kit
> (ftp.netwinder.org/pub/ccc/images/dm-2.1-12.tar.gz ) onto a local drive of a
> RedHat 5.2 Intel box
> 3. NFS booted the EBSA to the extracted netwinder kit on that Intel box
>
> The system can boot up to runlevel 3 ( removing some of the invalid startup
> files )
>
> The problem we are hitting at the moment is, we can telnet from the EBSA to
> other systems on the net. However we cannot telnet to the EBSA from those
> systems. After looking at the startups I have found that some programs (
> including tftpd ) print "Illegal Instruction" and sometimes ( core dump)
> when executed.
tftp, tftpd are probably broken. There were bugs in glibc that prevented things
from running.
As well there are bugs in the implementation of socket calls and mmap in glibc
from that disk image. I suggest you look at the tools section on netwinder.org
for more information.
One other thing to note, is the netwinder image was compiled specifically for
arm arch 4. It will use instructions specific to that architechure, that aren't
supported on earlier architechures or Risc PC's.
> We did pull the RPM files from the arm-linux ftp site to try and replace the
> bad files, but found that there is not an rpm program there to install them
> with. ( You guessed it, the one from the netwinder image gives an illegal
> instruction error ).
>
> Another piece of information is that we pulled the files from the instimage
> area of armlinux.org and replaced files in the /bin area of the netwinder
> kit with them, this fixed a couple of programs ( bash and ls were two)
> although replacing the ps program still put up the 'Illegal Instruction
> message'.
The netwinder disk image is mostly an ELF system, while Russell's RPMS are
a.out. The disk image may not have all the proper libraries required for
Russell's binaries. I'm not sure how ELF and a.out dynamically linked
executables will coexist. I can forsee difficulties there.
> Have you, or anyone else got any more words of wisdom that could help us get
> further.
Nope. Do you have any more info on the invalid instructions. They aren't
floating point instructions are they? If so you may need the FPE loaded, or use
a kernel with the NWFPE built in.
Scott
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