Kernel dump and secure boot with KARL

Hi All,

I am very much new to OpenBSD. I have come across KARL, and I wonder since
a new kernel image is created on every boot, how does it impact secure
boot.How the new binary is signed ? Is the kernel image signed on every
boot ?
Also suppose we have a crash and dump is generated, how does KARL impact
gdb when the core file is opened ?

Regards,
Arka