Flushing Memory Post: 71929

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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