Bring down system on fatal error
() function makes the
system terminate. The message
style format string.
The message is printed to the console and the location pointed to by the
global char pointer panicstr
is set to the
address of the message text for retrieval from the OS core dump.
If the kernel debugger is installed, control is passed to it. Otherwise, an
attempt is made to save a core dump of the OS to a configured dump device.
() is called twice (from the disk
sync routines, for example) the system is rebooted without syncing the disks.
() function does not return.