Experimental Physics and
Industrial Control System

Hi Rod,

On 07/06/10 21:04, Rod Nussbaumer wrote:
> Hi all.
>
> I'm trying to get EPICS running on an ARM CPU. So far I've got a build
> of EPICS (3.14.10 & 3.14.11) against a glibc 2.3.6 and Linux 2.6.21,
> where the only thread model supported is linuxthreads (not POSIX/nptl).
> When I run an IOC, the iocShell crashes (segfault), although the rest of
> the IOC (asyn device support), and record processing seem to stay
> running. Is this a reason to suspect the tread model?
> I see in the EPICS build commandline, the switch '-D_POSIX_THREADS'.
> Does this mean a strict POSIX thread model is required?

We are using similar Linux environment on ARM CPU for our devices too. The '-D_POSIX_THREADS' is also present and the IOC runs as expected - using bas 3.14.10 + asyn R4-9 (or R4-10)..

Maybe it is a compiler issue - we are using:
sbox-arm-none-linux-gnueabi-gcc (GCC) 3.4.4 (release) (CodeSourcery ARM 2005q3-2)


>
> The iocShell crashes right after iocInit. Running under gdb, I set a
> breakpoint on iocInit. I see:
>
>
> (gdb) step
> Single stepping until exit from function iocshBody,
> which has no line number information.

Hmm, try recompiling EPICS with debugging info to get more information here..

Regards,
Hinko

--
Hinko Kocevar
Technical support software engineer
Instrumentation Technologies d.d.
Velika pot 22, SI-5250 Solkan - Slovenia
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Thread model for EPICS on ARM CPU Rod Nussbaumer

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