2 # ----------------------------------------------------------------------
3 # extract-vmlinux - Extract uncompressed vmlinux from a kernel image
5 # Inspired from extract-ikconfig
6 # (c) 2009,2010 Dick Streefland <dick@streefland.net>
8 # (c) 2011 Corentin Chary <corentin.chary@gmail.com>
10 # Licensed under the GNU General Public License, version 2 (GPLv2).
11 # ----------------------------------------------------------------------
15 # Use readelf to check if it's a valid ELF
16 # TODO: find a better to way to check that it's really vmlinux
18 readelf
-h $1 > /dev
/null
2>&1 ||
return 1
26 # The obscure use of the "tr" filter is to work around older versions of
27 # "grep" that report the byte offset of the line instead of the pattern.
29 # Try to find the header ($1) and decompress from here
30 for pos
in `tr "$1\n$2" "\n$2=" < "$img" | grep -abo "^$2"`
33 tail -c+$pos "$img" |
$3 > $tmp 2> /dev
/null
41 if [ $# -ne 1 -o ! -s "$img" ]
43 echo "Usage: $me <kernel-image>" >&2
48 tmp
=$
(mktemp
/tmp
/vmlinux-XXX
)
51 # Initial attempt for uncompressed images or objects:
54 # That didn't work, so retry after decompression.
55 try_decompress
'\037\213\010' xy gunzip
56 try_decompress
'\3757zXZ\000' abcde unxz
57 try_decompress
'BZh' xy bunzip2
58 try_decompress
'\135\0\0\0' xxx unlzma
59 try_decompress
'\211\114\132' xy
'lzop -d'
62 echo "$me: Cannot find vmlinux." >&2
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