RM42L432: undefEntry when using critical sections in interrupt handler

Part Number: RM42L432
Other Parts Discussed in Thread: HALCOGEN

Hi,

I am porting a project from STM32 that is using some external peripherals. My problem boils down to this:

In interrupt handler that is caused by gioNotification from external peripheral i have to communicate through SPI. To do this, I have to enter/exit critical section. When exiting critical section I get undefEntry (program stuck at line 4).

resetEntry
        b   _c_int00
undefEntry
        b   undefEntry
svcEntry
        b   svcEntry
prefetchEntry
        b   prefetchEntry
        b   _dabort
        b   phantomInterrupt
        ldr pc,[pc,#-0x1b0]
        ldr pc,[pc,#-0x1b0]

So my problem would look like:

void gioNotification(gioPORT_t *port, uint32 bit) {
   //code

   ENTER_CRITICAL();

   //communicate

   EXIT_CRITICAL();

   //code
}

and the error occurs at EXIT_CRITICAL();

As EXIT_CRITICAL() I used:

1. _enable_interrupts();
2. _enable_IRQ();
3.  asm(" cpsie i ");

Of course ENTER_CRITICAL() uses complementary functions at the same time.

All with the same result.

1. I am not using FIQ at the moment

2. It doesn't seem that the same or any other pending interrupt fires when executing EXIT_CRITICAL(), it just goes straight to undefEntry.

3. I used HalcoGen to generate config code. I did not change much with regards to interrupt handling except enabling them.

Does anybody have a clue?