[ECOS] "hello world" example crashes on synthetic linux target

[Andrew Lunn]

On Fri, Jan 07, 2005 at 09:06:42AM +0000, Bart Veer wrote:
> >>>>> "Tom" == jufi8ni02  <jufi8ni02@sneakemail.com> writes:
> 
>     Tom> Folks,
> 
>     Tom>   I'm compiling the hello.c example provided with eCos, using
>     Tom>   the linux synthetic target (default template).
> 
>     Tom> When I run the resulting object, it prints "Hello, eCos
>     Tom> world!" then throws core.
> 
>     Tom> gdb reports:
> 
>     Tom> Program received signal SIGSEGV, Segmentation fault.
>     Tom> 0x00000420 in ?? ()
>     Tom> (gdb) where
>     Tom> #0  0x00000420 in ?? ()
>     Tom> #1  0x01003394 in idle_thread_main (data=0)
>     Tom>     at /home/spon/Work/RTOS/eCos_from_source_attempt_2/ecos/packages/kernel/current/src/common/thread.cxx:1245
>     Tom> #2  0x01003051 in Cyg_HardwareThread::thread_entry (thread=0x0)
>     Tom>     at /home/spon/Work/RTOS/eCos_from_source_attempt_2/ecos/packages/kernel/current/src/common/thread.cxx:109
>     Tom> #3  0x00000000 in ?? ()
> 
>     Tom> Now, I'm aware that this isn't a big problem of itself - who
>     Tom> cares if the example program doesn't work? But I'd like to
>     Tom> know what's going on here - how do I go about resolving this
>     Tom> problem?
> 
> Is this with a recent kernel? There has been a change somewhere in the
> Linux kernel's signal handling. When the synthetic target's SIGALRM
> handler returns back to the Linux kernel it will give a SEGV, like the
> above. The same eCos executable running on an older Linux kernel works
> fine. I have not yet tracked down exactly what has changed.

Hi Bart

I'd not noticed this. My 2.6.10 kernel seems to work fine with
eCos. Is this a problem with a specific vendor kernel? Plain 2.4?

        Thanks
                Andrew

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