08-19-2015
Quote:
Originally Posted by
Abdo_8008
To corona688, I'd like to design the route from the beginning so i don't like read something then drop it and fail at the middle
That is often the way of things, sadly. One doesn't reach the moon with their first rocket, and we aren't still running the first UNIX circa epoch time 0.
Retracing UNIX's footsteps from the beginning as agent.kgb suggests is an interesting approach. The PDP-11 is a
very primitive computer but not quite so primitive that you have to input the bootloader by toggling switches.
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LEARN ABOUT NETBSD
kloader
KLOADER(4) BSD Kernel Interfaces Manual KLOADER(4)
NAME
kloader -- in-kernel bootloader
SYNOPSIS
options KLOADER
options KLOADER_KERNEL_PATH=""/netbsd""
DESCRIPTION
The kloader is the in-kernel bootloader for platforms that do not have a proper firmware.
Some platforms supported by NetBSD do not have a firmware that can boot the NetBSD kernel. Examples are game consoles (dreamcast port), and
handhelds (hpcarm, hpcmips, and hpcsh ports). On such platforms the bootloader is usually a host program that runs under the native OS.
This means that rebooting NetBSD is a lengthy process of booting into the native OS first, launching the bootloader program, and finally
booting NetBSD again. This problem is addressed by kloader, which allows the currently running kernel to serve as a bootloader for the ker-
nel being booted, thus avoiding the burden of booting into the native OS first.
When kloader is configured into the kernel, a call to reboot(2) causes the kloader to load the new kernel into memory, and arrange for con-
trol to be passed to the new kernel -- just like a standalone bootloader does. The new kernel then boots in the ordinary manner.
SEE ALSO
reboot(2), boot(8), reboot(8)
HISTORY
kloader first appeared in NetBSD 1.6.
BUGS
kloader ignores howto and bootstr arguments passed to the reboot(2) system call, and reboots the system with the previous boot settings.
kloader doesn't support booting compressed kernels.
The hpcarm port doesn't support kloader yet.
BSD
April 3, 2004 BSD