gv

1. gv is used to handle vmcore which is generated when linux crashed, accordingly you can debug vmcore with gdb
2. usage:
   1. gcc gv.c -o gv && gv your_vmcore. And gv will print the kernel image offset if ASLR enabled.
   2. gdb empty_elf your_vmcore. After enter gdb, and then run source kernel image -o $offset which was printed by gv.

note

1. gv will modify your vmcore, so you may need to back up your vmcore(cp vmcore vmcorebak)