From mboxrd@z Thu Jan  1 00:00:00 1970
From: jiangtao.jit@gmail.com (jiangtao.jit)
Date: Sat, 27 Aug 2011 11:44:50 +0800
Subject: Need help with the Uncompressed kernel be overriden after
	decompress_kernel called?
Message-ID: <201108271144484062556@gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi all.

In arch/x86/boot/compressed/head_32.S

before the call of decompress_kernel()
it load the address of z_extract_offset_negative(%ebx) as the output address
and actually the output_len of the decompressed kernel is larger than  extract_offset
so the decompressed data will override the uncompressed data begin at input_data
Is that the case?
How does it worked as the the input buffer is covered by the output buffer while uncompressing?
It confused me a lot.
or I'd made some misunderstanding on the decompressing routine?

Thanks. 


2011-08-27 
jiangtao.jit