error at startup running Hello World Example in rtems 4.6.6 / erc32 bsp

Andrei Chichak groups at
Wed Sep 30 04:27:15 UTC 2009


I found the problem in my BSP after a LOT of looking.

It turns out that my linkcmds file was not working properly and  
start.S, in copying ROM to RAM, did not use the proper addresses,  
corrupting the .data section.

This was causing calloc to fail setting up the work area.

I would suggest creating a variable in your program like:

int fu = 42;

and run through the initialization code and make sure that fu is being  
initialized properly.

With your code, it looks like you are trying to initialize 4GB of RAM.  
Either you have a lot of memory or the value of work_area_size got  

Hope this helps,

On 2009-September-24, at 9:51 AM, Nicolas Horro wrote:

> Hello,
> when downgrading from rtems 4.8.0 to rtems 4.6.6 I found that the  
> "hello world" example in real hardware with ERC32 bsp fails at  
> startup when executing the function  
> RTEMS_Malloc_Initialize( heap_start, heap_size, use_sbrk ).
> The line that fails is the memset() call.
> if (!starting_address) {
>  if ( rtems_cpu_configuration_get_do_zero_of_workspace() )
>    memset( starting_address, 0, length ); /* <= error */
> I believe this error is caused because <starting_address> and  
> <length> have invalid values:
> (gdb) x starting_address
> 0x2015e48:      0x00000000
> (gdb) x length
> 0x3d6c20:       0xffffffff
> but not sure about this.
> I tried to identify the changes between ERC32 BSP in RTEMS 4.8.0 (in  
> which hello world example works ok) and RTEMS 4.6.6, but I'm not  
> succeeding to understand the full startup project.
> I'm aware 4.6.6 is no longer being supported, but any tip on what to  
> look for would be really appreciated.
> Thanks in advance,
> Nicolás Horro
> _______________________________________________
> rtems-users mailing list
> rtems-users at

Andrei Chichak

Systems Developer
CBF Systems Inc.
4-038 NINT Innovation Centre
11421 Saskatchewan Drive
Edmonton, Alberta
T6G 2M9

Phone: 780-628-2072
Skype: andrei.chichak

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