linux-kernel - Re: [Fastboot] [CFT] ELF Relocatable x86 and x86

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Date:	Fri, 4 Aug 2006 19:43:27 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	fastboot@...l.org, Horms <horms@...ge.net.au>,
	Jan Kratochvil <lace@...kratochvil.net>,
	"H. Peter Anvin" <hpa@...or.com>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [Fastboot] [CFT] ELF Relocatable x86 and x86_64 bzImages

> The length error comes from lib/inflate.c 
> 
> I think it would be interesting to look at orig_len and bytes_out.
> 
> My hunch is that I have tripped over a tool chain bug or a weird
> alignment issue.

I thought so too, but I took vmlinuz images from people (Vivek) who had it
boot on their systems but those images still failed on my two machines.  

> 
> The error is the uncompressed length does not math the stored length
> of the data before from before we compressed it.  Now what is
> fascinating is that our crc's match (as that check is performed first).
> 
> Something is very slightly off and I don't see what it is.

I printed out orig_len -> 5910532 (which matches vmlinux.bin)
             bytes_out -> 5910531

> 
> After looking at the state variables I would probably start looking
> at the uncompressed data to see if it really was decompressing
> properly.  If nothing else that is the kind of process that would tend
> to spark a clue.

I am not familiar with the code, so very few sparks are flying.  I'll
still dig through though.  Thanks for the tips.

Cheers,
Don
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