Dynamic Libraries

[Till Straumann]

Angelo Fraietta wrote:
> What I mean is that a user can develop compiled modules and download 
> them into the flash filesystem. When RTEMS loads, looks in the flash 
> disk and loads any modules. This allows me to add modules at run-time 
> instead of compile time. The modules would be quite specific. It 
> ultimately means that the firmware can grow with the user -- i.e. they 
> can design and add modules to their hardware product without having to 
> rebuild the whole target.
> 

Yeah - you can do that with esh, I suppose or with Cexp.

-- Till

> Till Straumann wrote:
> 
>> Angelo Fraietta wrote:
>>
>>> Is it possible to create dynamic libraries for use within RTEMS, 
>>> similar to the way Windows uses DLLs?
>>>
>>
>> What exactly do you mean by dynamic libraries?
>> Note that there is no point in having shared libraries in RTEMS.
>> These objects make sense only when processes with different
>> address spaces want to share code. RTEMS, since it is a hard RTOS
>> must not use virtual memory - it has a flat memory address space
>> shared among all threads in the system.
>> When you load a simple old-fashioned "static" library into an
>> RTEMS system it "automatically" becomes shared.
>>
>> HTH
>> -- Till
>>
>>
>