This command dumps the full ARM register set.
On ARM this dumps the full set of user mode registers and all the alternate registers for other modes.
For example:
> r
MODE_USR:
   R0=6571de54  R1=0000002a  R2=00000002  R3=ffffffff
   R4=0000002a  R5=f8170414  R6=6571df14  R7=6403cba8
   R8=00000001  R9=6403c41c R10=640002f8 R11=6571de70
  R12=00000020 R13=00404e00 R14=f80818c0 R15=f800bfa8
  CPSR=60000013
  MODE_FIQ:
   R8=00000000  R9=ffffffff R10=ffffffff R11=00000000
  R12=00000000 R13=64000d0c R14=c080079c SPSR=e00000dc
  MODE_IRQ:
  R13=6400110c R14=00000013 SPSR=20000013
  MODE_SVC:
  R13=6571de54 R14=f80328bc SPSR=60000010
  MODE_ABT:
  R13=6400090c R14=ffff0010 SPSR=400000d7
  MODE_UND:
  R13=6400090c R14=95221110 SPSR=f000009d