ISR and Task’s stack on Cortex-M3

Does anybody know if ISRs share the same task’s stack space on an FreeRTOS Cortex-M3 port? Or they use a different stack space? Thanks,

ISR and Task’s stack on Cortex-M3

All interrupts (which may nest) use the stack that main() uses when it starts running.  Tasks use stacks that come from the FreeRTOS heap.  So, they are separate. Regards.