[ECOS] printf not working in ARM simulator

Portos contact@portos.org
Mon Dec 29 14:14:00 GMT 2008

On a related note, cyg_thread_delay() also doesn't seem to work. It hangs,
perhaps because there is no active timer that is counting. It doesn't work
on a simulation platform?



Portos wrote:
> Hi,
> We're trying to run the eCos examples such as hello.c and twothreads.c
> under arm-elf-gdb with "target sim" (cygwin on a Pentium). They seem to
> work when we remove the calls to printf.
> We use the default configuration given by the template ARM Evaluation
> Board (AEB-1), and configtool-060710.exe
> malloc seems to work. Why doesn't printf work?
> It hangs for a while and then exits with the message "ARMulator can't
> allocate VM page: Cannot allocate memory".
> On some occasions we got the message "unknown SWI encountered - ffffff -
> ignoring" but we can't remember how we got it (perhaps when running
> Insight. The number wasn't always ffffff).
> This is similar to the message reported here:
> http://ecos.sourceware.org/ml/ecos-discuss/2003-10/msg00300.html
> If someone could tell us how to get printf to work under ecos and ARM
> simulation mode, it would be really helpful.
> Thank you,
> Roy

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