GDB

Switch thread

> info threads
  Id   Target Id                    Frame 
  1    Thread 1.1 (CPU#0 [running]) 0x0000000000000000 in ?? ()
* 2    Thread 1.2 (CPU#1 [running]) 0x0000000000000300 in ?? ()
  3    Thread 1.3 (CPU#2 [running]) 0x0000000000000300 in ?? ()
  4    Thread 1.4 (CPU#3 [running]) 0x0000000000000300 in ?? ()

> thread {Id}

Print program counter

> x/3i $pc
=> 0x300:       mov     x5, #0xd8                       // #216
   0x304:       mrs     x6, mpidr_el1
   0x308:       and     x6, x6, #0x3