smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
KDB: enter: Break to debugger
[ thread pid 10 tid 100002 ]
Stopped at      $d.5:   ldrb    r15, [r15, r15, ror r15]!
db> bt
Tracing pid 10 tid 100002 td 0xc2ceab40
db_trace_self() at db_trace_self
         pc = 0xc04b3e74  lr = 0xc00cc6bc (db_stack_trace+0x108)
         sp = 0xd5152880  fp = 0xd5152898
db_stack_trace() at db_stack_trace+0x108
         pc = 0xc00cc6bc  lr = 0xc00cc310 (db_command+0x258)
         sp = 0xd51528a0  fp = 0xd5152940
         r4 = 0x00000001  r5 = 0x00000000
         r6 = 0xc057ebd4 r10 = 0xc082e940
db_command() at db_command+0x258
         pc = 0xc00cc310  lr = 0xc00cc0a8 (db_command_loop+0x74)
         sp = 0xd5152948  fp = 0xd5152958
         r4 = 0xc05512ae  r5 = 0xc0575e8c
         r6 = 0xc082e92c  r7 = 0xc07c6ef8
         r8 = 0xc06a6074  r9 = 0xc07c6ed8
        r10 = 0xc064cbd8
db_command_loop() at db_command_loop+0x74
         pc = 0xc00cc0a8  lr = 0xc00cfac4 (db_trap+0x12c)
         sp = 0xd5152960  fp = 0xd5152a78
         r4 = 0x00000000  r5 = 0xc082e938
         r6 = 0xd5152b28 r10 = 0xc064cbd8
db_trap() at db_trap+0x12c
         pc = 0xc00cfac4  lr = 0xc027b278 (kdb_trap+0x19c)
         sp = 0xd5152a80  fp = 0xd5152aa8
         r4 = 0x00000000  r5 = 0x00000001
         r6 = 0xd5152b28  r7 = 0xc07c6ef8
kdb_trap() at kdb_trap+0x19c
         pc = 0xc027b278  lr = 0xc04d76e0 (undefinedinstruction+0x218)
         sp = 0xd5152ab0  fp = 0xd5152b20
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0xc04d7410  r7 = 0xe7ffffff
         r8 = 0xd5152b28  r9 = 0x00000001
        r10 = 0xc027ab80
undefinedinstruction() at undefinedinstruction+0x218
         pc = 0xc04d76e0  lr = 0xc04b6894 (exception_exit)
         sp = 0xd5152b28  fp = 0xd5152bc8
         r4 = 0x60000193  r5 = 0xd7faf890
         r6 = 0x0000000a  r7 = 0x00040000
         r8 = 0x00000000  r9 = 0x00000000
        r10 = 0xc065e470
exception_exit() at exception_exit
         pc = 0xc04b6894  lr = 0xc027ab68 (kdb_alt_break_internal+0x1b0)
         sp = 0xd5152bb8  fp = 0xd5152bc8
         r0 = 0xc07c6ee8  r1 = 0x00000000
         r2 = 0xd5152af4  r3 = 0x60000193
         r4 = 0xd7faf800  r5 = 0xd7faf890
         r6 = 0x0000000a  r7 = 0x00040000
         r8 = 0x00000000  r9 = 0x00000000
        r10 = 0xc065e470 r12 = 0x00000294
$a.6() at $a.6
         pc = 0xc027ab84  lr = 0xc027a9b0 (kdb_alt_break+0x10)
         sp = 0xd5152bd0  fp = 0xd5152bd0
         r4 = 0xd7faf800  r5 = 0xd7faf890
         r6 = 0x0000000a  r7 = 0x00040000
kdb_alt_break() at kdb_alt_break+0x10
         pc = 0xc027a9b0  lr = 0xc014d650 (uart_intr_rxready+0x8c)
         sp = 0xd5152bd8  fp = 0xd5152be8
uart_intr_rxready() at uart_intr_rxready+0x8c
         pc = 0xc014d650  lr = 0xc014e490 (uart_intr+0x11c)
         sp = 0xd5152bf0  fp = 0xd5152c28
         r4 = 0xd7fa6000  r5 = 0xd7faf800
         r6 = 0xd7faf99c r10 = 0xc065e470
uart_intr() at uart_intr+0x11c
         pc = 0xc014e490  lr = 0xc01fcbf8 (intr_event_handle+0xa4)
         sp = 0xd5152c30  fp = 0xd5152c50
         r4 = 0xd7fa6000  r5 = 0xd5152d28
         r6 = 0xd7f8d058  r7 = 0xc2ceab40
         r8 = 0xc2c60700  r9 = 0x00000000
        r10 = 0xd5152d28
intr_event_handle() at intr_event_handle+0xa4
         pc = 0xc01fcbf8  lr = 0xc04baee8 (intr_isrc_dispatch+0x68)
         sp = 0xd5152c58  fp = 0xd5152c60
         r4 = 0xd7f8d058  r5 = 0xd5152d28
         r6 = 0xd7f8d058  r7 = 0x00000041
         r8 = 0xc05a83a6  r9 = 0xd7f8c018
        r10 = 0x001fffff
intr_isrc_dispatch() at intr_isrc_dispatch+0x68
         pc = 0xc04baee8  lr = 0xc04e65d0 (bcm2835_intc_intr+0x88)
         sp = 0xd5152c68  fp = 0xd5152c88
         r4 = 0xd7f8c000  r5 = 0x00000000
bcm2835_intc_intr() at bcm2835_intc_intr+0x88
         pc = 0xc04e65d0  lr = 0xc01fcbf8 (intr_event_handle+0xa4)
         sp = 0xd5152c90  fp = 0xd5152cb0
         r4 = 0xc2c8c300  r5 = 0xd5152d28
         r6 = 0x00000000  r7 = 0xc2ceab40
         r8 = 0xc2c60a40  r9 = 0x00000000
        r10 = 0xd5152d28
intr_event_handle() at intr_event_handle+0xa4
         pc = 0xc01fcbf8  lr = 0xc04baee8 (intr_isrc_dispatch+0x68)
         sp = 0xd5152cb8  fp = 0xd5152cc0
         r4 = 0xc2c67204  r5 = 0xd5152d28
         r6 = 0x00000000  r7 = 0x00000000
         r8 = 0x00000100  r9 = 0xc07c4b84
        r10 = 0xd5152d28
intr_isrc_dispatch() at intr_isrc_dispatch+0x68
         pc = 0xc04baee8  lr = 0xc04dde8c (bcm_lintc_intr+0x268)
         sp = 0xd5152cc8  fp = 0xd5152d08
         r4 = 0xc2c67000  r5 = 0x000000c0
bcm_lintc_intr() at bcm_lintc_intr+0x268
         pc = 0xc04dde8c  lr = 0xc04badac (intr_irq_handler+0x90)
         sp = 0xd5152d10  fp = 0xd5152d20
         r4 = 0xd5152d28  r5 = 0xc0828bb4
         r6 = 0xc2ceab40  r7 = 0x00000000
         r8 = 0xffffffff  r9 = 0xc07c4b84
        r10 = 0x0000007e
intr_irq_handler() at intr_irq_handler+0x90
         pc = 0xc04badac  lr = 0xc04b6894 (exception_exit)
         sp = 0xd5152d28  fp = 0xd5152dc0
         r4 = 0xc2ceab40  r5 = 0x0000007e
         r6 = 0xc07c4b94  r7 = 0x00000000
exception_exit() at exception_exit
         pc = 0xc04b6894  lr = 0xc04bdd9c (cpu_idle+0x74)
         sp = 0xd5152db8  fp = 0xd5152dc0
         r0 = 0x00000000  r1 = 0x000001c0
         r2 = 0x600000d3  r3 = 0x60000013
         r4 = 0xc2ceab40  r5 = 0x0000007e
         r6 = 0xc07c4b94  r7 = 0x00000000
         r8 = 0xffffffff  r9 = 0xc07c4b84
        r10 = 0x0000007e r12 = 0xffffffff
cpu_idle() at cpu_idle+0xa0
         pc = 0xc04bddc8  lr = 0xc0263e08 (sched_idletd+0x510)
         sp = 0xd5152dc8  fp = 0xd5152e20
         r4 = 0xc07c4b88 r10 = 0x0000007e
sched_idletd() at sched_idletd+0x510
         pc = 0xc0263e08  lr = 0xc01f9c48 (fork_exit+0xa0)
         sp = 0xd5152e28  fp = 0xd5152e40
         r4 = 0xc2ceab40  r5 = 0xc2ce6ab0
         r6 = 0xc02638f8  r7 = 0x00000000
         r8 = 0xd5152e48  r9 = 0x00000000
        r10 = 0x00000000
fork_exit() at fork_exit+0xa0
         pc = 0xc01f9c48  lr = 0xc04b6824 (swi_exit)
         sp = 0xd5152e48  fp = 0x00000000
         r4 = 0xc02638f8  r5 = 0x00000000
         r6 = 0x00000000  r7 = 0x00000000
         r8 = 0x00000000 r10 = 0x00000000
swi_exit() at swi_exit
         pc = 0xc04b6824  lr = 0xc04b6824 (swi_exit)
         sp = 0xd5152e48  fp = 0x00000000
db>