With debugging symbols:
(gdb) target kvm /var/crash/netbsd.1.core
0xffffffff80239985 in cpu_reboot (howto=260, bootstr=<optimized out>)
at /usr/src/sys/arch/amd64/amd64/machdep.c:702
702 config_detach_all(boothowto) ||
(gdb) bt
#0 0xffffffff80239985 in cpu_reboot (howto=260, bootstr=<optimized out>)
at /usr/src/sys/arch/amd64/amd64/machdep.c:702
#1 0xffffffff80cfd06b in ntp_adjtime1 (ntv=0x0)
at /usr/src/sys/kern/kern_ntptime.c:340
#2 0xffffffff80d3349f in kobj_checksyms (ko=<unavailable>,
undefined=<unavailable>) at /usr/src/sys/kern/subr_kobj.c:986
#3 0xffffffff80d33574 in kobj_checksyms (
ko=0xffffffff8188b7c0 <physio_initialized>, undefined=240)
at /usr/src/sys/kern/subr_kobj.c:1026
#4 0xffffffff8023c155 in trap (frame=0xffffffffffffff)
at /usr/src/sys/arch/amd64/amd64/trap.c:603
#5 0xffffffff80234a7b in alltraps ()
#6 0x0000000000000000 in ?? ()
(gdb)
