Re: Loading splash ok -> <reset>, how to debug?
- Reply: Warner Losh : "Re: Loading splash ok -> <reset>, how to debug?"
- In reply to: Bjoern A. Zeeb: "Loading splash ok -> <reset>, how to debug?"
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Date: Sun, 08 Jun 2025 16:05:12 UTC
On Sun, Jun 8, 2025 at 5:10 PM Bjoern A. Zeeb <bzeeb-lists@lists.zabbadoz.net> wrote: > Hi, > is there any good way to debug early kernel kabooms (or maybe efi loader > handover) without JTAG in place? > I have a SoC using U-Boot and often after a cold start it goes like > this: > ------------------------------------------------------------------------ > Hit [Enter] to boot immediately, or any other key for command prompt. > Booting [/boot/kernel/kernel]... > Using DTB provided by EFI at 0x3e6c3000. > Loading splash ok > <reset> > ------------------------------------------------------------------------ > Once it's been looping for a few iterations eventually it starts > booting. > Given there is zero output of the error, is there aything one could try > to do to debug this (remotely)? > I can netboot it and change laoder/kernel. DDB? https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/#kerneldebug-online-ddb KGDB? https://docs.freebsd.org/en/books/developers-handbook/kerneldebug/#kerneldebug-online-gdb over the Serial Port? :-) -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info