Re: boot -d

[Paul Goyette <paul%whooppee.com@localhost>]

On Thu, 12 Nov 2020, Edgar Fuß wrote:

> Hello again.
>
> In about the third nesting level of what I wanted to do in the first place,
> I tried "boot netbsd -d" in the secondary boot. It loads the kernel, then
> complains about the ffs module missing (I don't use modules and don't have
> an 8.2 directory on that machine), clears the screen, displays
> "fatal breakpoint in supervisor mode" and re-boots.
>
> The problem is that the interesting messages are displayed only for a
> fraction of a second. In one out of three tries, I was able to catch them
> (partly) using the "slomo" (i.e. high speed) video recording mode of my
> iPhone, but of the line after the "fatal breakpoint" message, only the
> top half is displayed before it is cleared, so it's very hard to read the
> interesting parts.

Any chance of getting the messages via a serial console connection?

Can the problem be reproduced in qemu?

(I'm not sure what the first two nesting levels were, but it would
help to describe what you're trying to boot - kernel config, version,
etc. - and in what environment - hardware, emulator, etc.)


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