ubldr

[Balanga Bar]

I found the ubldr from 11.2 would look for kernel on disk whereas the one
from 12.0 tried to boot from net, so I copied the 11.2 version to the FAT
partition on a USB stick and it finds the 12.0 kernel on a UFS partition on
the stick.

On Wed, Apr 17, 2019 at 3:28 PM Ian Lepore <ian at freebsd.org> wrote:

> On Wed, 2019-04-17 at 09:06 +0100, Balanga Bar wrote:
> > Thanks for the link. I notice this bit:-
> >
> > ubldr
> >
> >    - [ need more here too ]
> >
> > so am none the wiser really. I get the impression that ubldr is a
> > fairly
> > recent introduction, ie I don't think it got built under FreeBSD 9...
> >
>
> I had a feeling that wiki page would be too out of date to be useful. I
> wrote most of that before ubldr came into existance; it mostly
> describes how old arm systems booted without using loader(8) at all.
>
> So, the short answer is:  ubldr is loader(8) compiled with options to
> use U-Boot "API" services as a bios.  It requires that u-boot be built
> with the CONFIG_API option.  In u-boot, you load ubldr as if it were
> the kernel, and it uses uboot API calls to find and load the kernel and
> modules.
>
> -- Ian
>
> > On Wed, Apr 17, 2019 at 2:20 AM Hyun Hwang <hyun at caffeinated.codes>
> > wrote:
> >
> > > On Tuesday, April 16, 2019, 6:53 PM (UTC-04:00), Balanga Bar <
> > > balanga.bar at gmail.com> wrote:
> > > > Can anyone tell me what ubldr is or provide a link to info about
> > > > it?
> > >
> > > ubldr is u-boot loader. Please refer to [this article](
> > > https://wiki.freebsd.org/FreeBSD/arm/BootProcess).
> > > --
> > > Hyun "Harold" Hwang
> > >
> >
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>