Re: Loading splash ok -> <reset>, how to debug?
Tomek CEDRO <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <CAFYkXjkjmLv4+UxF22b41JWiJv5D5c+swUjshdx5vytJZChZpA@mail.gmail.com> |
On Sun, Jun 8, 2025 at 5:10 PM Bjoern A. Zeeb <[email protected]> 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