Hi Everyone,
I hope I'm phrasing this question correctly(?)
I'm trying to run a combination of FreeRTOS+lwIP on an ARM Cortex-R5
(Xilinx SDK 2018.2, gcc 7.2.1). The project I'm working on makes use of
thread-local storage through the use of the __thread keyword. However,
each FreeRTOS task is returned the same pointer. To work around this
issue, I'm planning on overriding the function that returns the pointer
to the thread-local storage area to make use of the
pvTaskGetThreadLocalStoragePointer function offered by FreeRTOS. I've
used this trick before on a MicroBlaze based platform, where I simply
implemented the __get_tls_addr function and once on a Cortex-M4, where I
only needed to implement the __aeabi_read_tp function. The latter was
not using gcc by the way. The armr5-none-eabi-gcc compiler mentions the
-mtp= flag. By specifying -mtp=soft and implementing __aeabi_read_tp I
was hoping to achieve what I envisioned but the function doesn't seem to
be called.
Hopefully someone can point me in the right direction?
Exact version of the compiler: armr5-none-eabi-gcc (GNU Tools for ARM
Embedded Processors) 7.2.1 20170904 (release) [ARM/embedded-7-branch
revision 255204]
Thanks in advance.
Best Regards,
Jeroen Koekkoek
