Section Placement: Flash copy to ram

Dear Arm programmers :)

To speed up my STM32F4 from the STM32F4Discovery board i tried to run code from sram instead of flash. I think the best solution for me is that the code is copied from flash into sram when power on.

I think i need "Section Placement: Flash copy to ram" in this case. So I chose it and i selected the flash_to_ram_placement.xml document as section placement file. What should I write in "Applicable loaders"?

I tried running it and it compiles bit when starting to debug i get "unknow function at 0x20000042"

What can i do to make it run?

Thank you for your help!

Florian