grlib> c    
IU in error mode (tt = 0x01)
 a80ceff0  0ceff000   unknown opcode: 0x0ceff000
grlib> hist
   91756041  40011bc8  bcs,a  0x40011c10           [00000000]
   91756043  40011bd0  cmp  %l1                    [80000200]
   91756053  40011bd4  be  0x40011c08              [00000000]
   91756059            ahb read,  mst=0, size=2    [40011bfc 12bfffed]
   91756130            ahb read,  mst=0, size=2    [00002000 a7580000]
   91756132  40011bd8  ld  [%l0], %o0              [a7580000]
   91756134  40011bdc  st  %o0, [%l1]              [80000200 a7580000]
   91756136            ahb write, mst=0, size=2    [80000200 a7580000]
   91756206            ahb read,  mst=0, size=2    [00002010 a7580000]
   91756208  40011be0  ld  [%l0 + 0x10], %o0       [a7580000]
   91756278            ahb read,  mst=0, size=2    [0000200c a80ceff0]
   91756279  40011be4  ld  [%l0 + 0xc], %o1        [a80ceff0]
   91756283            ahb read,  mst=0, size=2    [a80ceff0 0ceff0f0]
   91756284  40011be8  call  %o1                   [40011be8]
   91756285            ahb read,  mst=0, size=2    [a80ceff4 0ceff0f0]
   91756286  40011bec  mov  0, %l1                 [00000000]
   91756287            ahb read,  mst=0, size=2    [a80ceff8 0ceff0f0]
   91756289            ahb read,  mst=0, size=2    [a80ceffc 0ceff0f0]
   91756294            ahb read,  mst=0, size=2    [a80cf000 0ceff0f0]
   91756295  a80ceff0  unknown opcode: 0x0ceff0f0  [trapped]
grlib>