Re: [ECOS] Re: Beginners troubles

[Sergei Gavrikov <sergei dot gavrikov at gmail dot com>]

On Wed, 11 Aug 2010, Robert Gosztyla wrote:

> > arm-eabi-gcc -g -Os -Ifirst_install/include test1.c -Lfirst_install/lib -Ttarget.ld -nostdlib
>
> This problem is resolved, now i can compile my program, but as the
> result i receive:
>
> /home/xpurogo/ecos/gnutools/arm-eabi/bin/../lib/gcc/arm-eabi/4.3.2/../../../../arm-eabi/bin/ld:
> address 0x40004b7c of a.out section .bss is not within region ram. I
> know that this is common question, but is there any common answer for
> that? :)
>
> My linker script looks like that:
>
> MEMORY
> {
>    ram : ORIGIN = 0x40000000, LENGTH = 16k
>    rom : ORIGIN = 0x00000000, LENGTH = 256k
> }
>
> These are available memory sizes for my system. I'm using kernel
> konfiguration, which seems to be too big to handle in memory? I've
> tried use minimal configuration but i've got more stragne errors
> trying to compile my program. Is it possible to disable some options
> in kernel configuration to handle that?

Hi Robert,

as John said "you may find...", and you got it :-) though it's possible
to build some of the eCos tests for such kind of targets. For example,
there is 'mcb2100' target in eCos 3.0 repository (that board has LPC2129
CPU)

Create fresh directory, chdir there and try to built eCos and some tests
from a shell prompt as:

  % ecosconfig new mcb2100 kernel
  % ecosconfig tree
  % make -s
  % make -s IGNORE_LINK_ERRORS=1 tests

It was possible to build *some ELFs* for that target using 'kernel'
template

  % find install/tests -type f | wc -l
  81

and even some eCos kernel tests

  % find install/tests/kernel -type f | wc -l
  37

I hope that you can get something like the above for your target, though
your target has the very limited RAM resources to get more than that...

And if you use 'minimal' template, that first, try to tune this option

  cdl_option CYGNUM_HAL_COMMON_INTERRUPTS_STACK_SIZE


HTH

Sergei

PS

Please, do not use top-posting then here
http://en.wikipedia.org/wiki/Top_posting

> 2010/8/6 John Dallaway <john@dallaway.org.uk>:
> > Robert
> >
> > Robert Gosztyla wrote:
> >
> > > With this line i'm trying to compile it:
> > >
> > > arm-eabi-gcc -g -Os -Ifirst_install/include test1.c -Lfirst_install/lib -Ttarget.ld -nostdlib
> > >
> > > but question is - should i use arm-eabi-gcc.exe?
> >
> > Yes. When building eCos application code we generally use separate
> > invocations of arm-eabi-gcc for compiling and linking. You also need to
> > specify various target-specific compiler flags. Use the eCos examples
> > makefile as an example of how to do this:
> >
> > Âcd /opt/ecos/ecos-3.0/examples
> > Âmake INSTALL_DIR=/your/path/to/first_install
> >
> > You may find that you don't have enough target memory to link the
> > examples, but the various flags used when compiling and linking should
> > be correct for your LPC2124 target.
> >
> > I hope this helps...
> >
> > John Dallaway
> > eCos maintainer
>
> --
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