diff options
| author | Maxime Thiebaut <maxime+kernel@thiebaut.dev> | 2025-08-22 10:40:03 +0200 |
|---|---|---|
| committer | Nathan Chancellor <nathan@kernel.org> | 2025-08-28 15:25:48 -0700 |
| commit | 1e150869caf2fe540dd9c3367e124b59c23228c7 (patch) | |
| tree | bff4ceaa95c3617ff409493a04bda924d53a69ac | |
| parent | 0354e81b7bd629f9c3379c9524e988ebc504fa25 (diff) | |
extract-vmlinux: Output used decompression method
When extract-vmlinux succeeds, it doesn't output which decompression method
was found at which offset. Adding this additional output in check_vmlinux()
helps troubleshooting and reverse-engineering images.
The last check_vmlinux() call was also quoted to accept spaces.
Signed-off-by: Maxime Thiebaut <maxime+kernel@thiebaut.dev>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Link: https://lore.kernel.org/r/X6OQ4pHdpreJtlTnf0tFEb4Uxz8T8gFv_7Yw6tpBK4ZBgHYjJr_URwUwCVynpkb-H8Yjk7DdBF01zY-sfqu_7N5trZQfcd6s_4PtdGlHtlA=@thiebaut.dev
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
| -rwxr-xr-x | scripts/extract-vmlinux | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/scripts/extract-vmlinux b/scripts/extract-vmlinux index 189956b5a5c8..266df9bc7a48 100755 --- a/scripts/extract-vmlinux +++ b/scripts/extract-vmlinux @@ -10,12 +10,15 @@ # # ---------------------------------------------------------------------- +me=${0##*/} + check_vmlinux() { if file "$1" | grep -q 'Linux kernel.*boot executable' || readelf -h "$1" > /dev/null 2>&1 then cat "$1" + echo "$me: Extracted vmlinux using '$2' from offset $3" >&2 exit 0 fi } @@ -30,12 +33,11 @@ try_decompress() do pos=${pos%%:*} tail -c+$pos "$img" | $3 > $tmp 2> /dev/null - check_vmlinux $tmp + check_vmlinux $tmp "$3" $pos done } # Check invocation: -me=${0##*/} img=$1 if [ $# -ne 1 -o ! -s "$img" ] then @@ -57,7 +59,7 @@ try_decompress '\002!L\030' xxx 'lz4 -d' try_decompress '(\265/\375' xxx unzstd # Finally check for uncompressed images or objects: -check_vmlinux $img +check_vmlinux "$img" cat 0 # Bail out: echo "$me: Cannot find vmlinux." >&2 |