Re: [Fastboot] [CFT] ELF Relocatable x86 and x86_64 bzImages

From: Eric W. Biederman
Date: Sat Aug 05 2006 - 12:12:21 EST

Don Zickus <dzickus@xxxxxxxxxx> writes:

>> 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.

I guess the interesting thing to do would be to
- Recompute the crc to see if we still match.
- Possibly instrument of flush_window.

I have a strange feeling that the uncompressed data is getting corrupted
after we have flushed the window.


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