Hi all,

we just migrated to the new openrisc newlib compiler toolchain and encounter a problem with the stack.

Is there a simple example how to set up the stack via linker script or a board def file somewhere one could point us to?

From the boot up code it looks like we have to set

_or1k_board_mem_base
_or1k_board_mem_size
_or1k_exception_stack_size
_or1k_stack_size

but somehow as soon as the or1k_init function is called that uses the stack for the first time, we get an access to a completely wrong address.

Thanks for any help,
regards,
Daniel

Hi Daniel,

you are right about what you find. The default way is to use a board file using the -mboard switch. The default is or1ksim: https://github.com/openrisc/newlib/blob/or1k/libgloss/or1k/boards/or1ksim.S

I think everything that is "weak" can be overwritten by user code, so your method should work actually. I will double-check to test it, too. Which version are you using?

Cheers,
Stefan

Thanks Stefan,

with the example we solved the problem.

Regards,
Daniel

Hi Daniel,

If you need more help in the future, you can also sign up on the OpenRISC mailing list at https://lists.librecores.org/ or join us on IRC #openrisc @ freenode.net

Best Regards,
Olof Kindgren