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Date:      Mon, 11 Jan 1999 17:56:13 +0100 (CET)
From:      Charlie Root <root@random.nask.waw.pl>
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   i386/9441: dset broken for ELF kernels
Message-ID:  <199901111656.RAA00672@random.nask.waw.pl>

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>Number:         9441
>Category:       i386
>Synopsis:       dset doesn't work with ELF kernels
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 11 09:00:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     Andrzej Bialecki
>Release:        FreeBSD 3.0-CURRENT i386
>Organization:
NASK
>Environment:

	FreeBSD 3.0-current i386, ELF kernel

>Description:

	dset tries to write back parameters from UserConfig to kernel
	image. It fails when kernel format is ELF, probably due to some
	dependency on the actual layout of the file.

>How-To-Repeat:

	1. install ELF kernel
	2. boot: -c and change some values
	3. dset reports error, and doesn't set the values permanently

>Fix:
	
	The problem can be worked around by not using dset. Recently
	added sysctl machdep.uc_devlist exports changed values. These
	values can be simply formatted to form a valid /kernel.config
	file, which can be loaded on startup.

	See src/release/picobsd/tinyware/kget for example.

>Release-Note:
>Audit-Trail:
>Unformatted:

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