TMS570LS0914: Data abort exception when writing to ECKL-GIO in freertos task

Tool/software:

Hi,

I ported the freertos HalCoGen project for the TMS570LS0714PGE to TMS570LS0914PGE. It works fine, the example tasks starts and toggles GIOB.3. I also configured the ECLK to be used as GIO. Toggling it before starting the scheduler works. Toggling ECLK within the example task causes a data abort exception. I am wondering what's special about the ECLK as GIO, what am I missing? Can it be caused by the MPU?

This is my modified linker script:

MEMORY
{
    VECTORS (X) : origin=0x00000000 length=0x00000020
   KERNEL (RX) : origin=0x00000020 length=0x00008000
   FLASH0 (RX) : origin=0x00008020 length=(0x00100000 - 0x8000 - 0x20)
   STACKS (RW) : origin=0x08000000 length=0x00000800
   KRAM (RW) : origin=0x08000800 length=0x00000800
   RAM (RW) : origin=0x08001000 length=(0x00020000 - 0x800 - 0x800)
}

SECTIONS
{
.   intvecs : {} > VECTORS
   .kernelTEXT : {} > KERNEL
   .cinit : {} > KERNEL
   .pinit : {} > KERNEL
   .text : {} > FLASH0
   .const : {} > FLASH0
   .kernelBSS : {} > KRAM
   .kernelHEAP : {} > RAM
   .bss : {} > RAM
   .data : {} > RAM
}