An example of debugging a kernel panic by disassembling an ARM Linux kernel.

[  128.459816] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[  128.468018] Unable to handle kernel NULL pointer dereference at virtual address 00000002
[  128.468026] pgd = d8f38000
[  128.468035] [00000002] *pgd=1a660831, *pte=00000000, *ppte=00000000
[  128.468041] Internal error: Oops: 817 [#1] PREEMPT SMP ARM
[  128.468046] Modules linked in:
[  128.468062] task: d8f29300 ti: d8f70000 task.ti: d8f70000
[  128.468074] PC is at futex_wait_setup+0x90/0x14c
[  128.468080] LR is at get_parent_ip+0x10/0x2c
[  128.468086] pc : [<c00704d8>]    lr : [<c0040f30>]    psr: 600d0013
[  128.468086] sp : d8f71df8  ip : f66b1657  fp : 00000000
[  128.468090] r10: 00000002  r9 : 00000000  r8 : d8f71e88
[  128.468094] r7 : d8f70000  r6 : b56b1654  r5 : 00000002  r4 : d8f71ea4
[  128.468099] r3 : d96c4240  r2 : 000002ce  r1 : b56b1654  r0 : d8f71e04
[  128.468104] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  128.468109] Control: 10c5387d  Table: 18f3806a  DAC: 00000015

As you can see:

• kernel panic occurred in futex_wait_setup, offset 0x90
• register r5 contains the value 00000002