linux-image-4.15.0-1021-raspi2-dbgsym 4.15.0-1021.23 (arm64 binary) in ubuntu cosmic

 This package provides a kernel debug image for version 4.15.0 on
 ARMv8 SMP.
 .
 This is for sites that wish to debug the kernel.
 .
 The kernel image contained in this package is NOT meant to boot from. It
 is uncompressed, and unstripped. This package also includes the
 unstripped modules.