How to Force a Panic


At the console type "<return>~i" or hit the console wakeup button
on the system.

   $
   $~iCPU 0 trap511 halt executed
   0001f37c [0001f37c] _halt+4      % f400c001 jmp      r1
   #0>

This takes you to console mode.  The number in the prompt is the
cpu you are currently running on.  Type "wb %pc 00".

   #0>wb %pc 00

This puts an 00 at the byte location of the program counter (pc).
Type "r" and hit return. The kernel will panic with invalid
instruction.

   #0>r

   PANIC: Invalid Instruction Fault trap at pc = 0x0003ED14 in kernel mode
   DSISR=0x0A000000.

   Syncing buffer cache...  done.


   Dumping to dev 01980001 (d_dump=0006EC9C)
      Memory extent 0 to byte offset 0x09C00000

   gd (is0 ID 2, LUN 0) : Resetting controller

If kdb was enabled, you will see the following right after the PANIC
message:

   DEBUGGER: type ? for help, ^D to quit
   kdb>> 

   Enter <cntrl>D to exit the debugger:

   DEBUGGER exiting
   ...

While the system reboots you should see savecore messages.  This indicates
that the panic succeeded and you will get a crashfile.

   ...
   File system check complete.

   savecore: System went down at Fri Feb 19 14:22:15 1999
   savecore: Copying /stand/unix to /var/crashfiles/unix.0
   savecore: Saving memory dump to /var/crashfiles/vmcore.0
   savecore: Saved 16048128 bytes of dump to /var/crashfiles/vmcore.0
   ...