Trouble debugging a kernel dump (kgdb: kvm_read: invalid address)

Hi

The problem is probably in front of the keyboard, but I don't know what I'm
doing wrong.

A pc of a friend of mine has been crashing lately after installing 6.0R on it.
It has ran 4.10R rock solid ever since it was released.

Whenever I try to open the dump I get the following:

# kgdb -d /usr/crash/ -n 0 /usr/src/sys/i386/compile/SAPPHIRE/kernel.debug
kgdb: kvm_read: invalid address (0x50012)
kgdb: kvm_read: invalid address (0x7)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
kgdb: kvm_read: invalid address (0x50)
<last line repeats until I kill kgdb)

Thank for any help you can give.

--
greetz Joost
joost@xxxxxxxxxxx
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