sparc stack and heap

Joel Sherrill joel.sherrill at
Tue Jul 25 14:11:17 UTC 2006

Aleix Conchillo Flaqué wrote:

> Thanks for the answer Chris.
> I'll need to modify some things from the ERC32 bsp, because I need to  
> keep some data into RAM between reboots, so I'll have to play with  
> heap and workspace addresses.

The simplest think to do would be to edit the linkcmds and reserve an 
area after the BSS.  If you
move the "end" symbols to after your reserved block, then it will just 
be ignored by the BSP
when it is carving memory.

You could do this in an application specific linkcmds and add 
-qnolinkcmds -T myLinkcmds
to the gcc command that links your application.  It would avoid 
otherwise changing the
BSP as installed by RTEMS.


> Regards,
> aleix
> On 25 Jul 2006, at 15:23, Chris Johns wrote:
>> Aleix Conchillo Flaqué wrote:
>>> I'll answer my self, task stacks are allocated in the heap. Right?
>> No the workspace.
>> You need to decided now to the split the memory between the  
>> workspace and the heap. The typical way is to place the workspace  at 
>> the top and the heap between the end of .bss and the start of  the 
>> workspace.
>> Regards
>> Chris

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