Re: How to debug boot sequence?
H. Peter Anvin (hpa@transmeta.com)
10 Apr 1998 12:42:19 GMT
Followup to: <19980410130257.44042@atrey.karlin.mff.cuni.cz>
By author: Martin Mares <mj@atrey.karlin.mff.cuni.cz>
In newsgroup: linux.dev.kernel
>
> Hi,
>
> > I have a problem with a diskless, remote booted machine whose
> > BIOS supports BOOTP.
> > With nearly all Kernels, booting gets to the 'Loading Linux........'
> > stage and then instantly rebooting the System (looping forever).
> > Exceptions are 2.0.31 and 2.1.93 (the only tested 2.1.x kernel) which
> > get to 'Uncompressing Linux...' and halting with
> > 'Invalid compressed format (err=1)'
> > How can I debug this things further? I looked at lib/inflate.c, where
> > this message comes from, but no clue what happens. Even
> > arch/i386/boot/compress/misc.c doesn't tell me much.
>
> It seems the kernel image gets corrupted. Try booting the same image
> from a floppy.
>
Invalid compressed format sounds like the protected-mode kernel
doesn't end up where it should, or isn't intact. It is hard without
knowing more about your software setup (boot loaders, etc; just how
exactly is the BIOS loading the kernel anyway) what's going on.
-hpa
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