Ok I’ve kicked out the two led blink tasks just for simplicity, and now i’m only running the idle task. Here are the two data aborts that occur:
Fault status: 0x00001C06
Fault addr: 0x04B27245
lr value: 0xC2007270
Fault status: 0x00000801
Fault addr: 0x11111109
lr value: 0xC200727C
And the code at those addresses:
First, the first data abort triggers. Then, my breakpoint at prvIdleTask + 8 triggers. At this point, i check r11 as it was supposed to have been set by the previous add instruction, but it is still the uninitialized value 0x11111111. This explains the second data abort, which i can prevent from happening by setting the pc back one instruction and (re?)-executing that add instruction before continuing. The mystery that still remains here is what is triggering the first data abort? Looking at the fault status register here, it looks like it is some external asynchronous AXI Slave error. Another mystery to me is where that initial fault address of 0x04B27245 is coming from.