STREAMS/UX for the HP 9000 Reference Manual

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Debugging STREAMS/UX Modules and Drivers
Generating and Retrieving System Core Dumps
type a “Control b” on the console. This will put your console under the
supervision of the access port. You will get a “CM>” prompt, at which you may
type “TC.”
• Series 800 Models 834/5, 845, and 8x2 have a key-operated TOC mechanism.
To execute a TOC, turn the key all the way to the right (clockwise).
• Series 800 Models 808 and 815 have a button-operated TOC mechanism. From
the rear of the machine, look for this button on the lower right-hand side (it will
be marked TOC). You will need an object, like a pen, to push the TOC button.
• Series 700s have a button-operated TOC mechanism. The button is on the right
side front of the computer. Pull open the door covering the system activity
LED's, and the TOC button is the small white button on the far left.
Core File Size Requirements
It is best if the size of the vmcore.N file is equal to that of the machine's
physical memory. Because the core file is an image of memory at the time
of a crash, if its size is not equal to the machine's physical memory size,
some information will be lost. However, it is still possible to get some
information from a partial core dump.
Symbol Information
Make sure that the vmunix.N file has not been stripped. adb and strdb will
not work without symbol information. Use the file command to confirm that
the symbols have not been stripped:
file vmunix.0
vmunix.0 s800 executable -not stripped