2015-04-14 04:44:14

by Alex Pilon

Subject: [PATCH] scripts/extract-ikconfig: Support LZ4-compressed images.

Support for kernel image LZ4 compression was added around 3.11, but not
the corresponding kernel .config extraction.

This makes possible extracting the kernel config for LZ4-compressed
kernels you're not running, or the current LZ4-compressed kernel if
compiled without /proc/config.gz support.

Signed-off-by: Alex Pilon <[email protected]>
---
scripts/extract-ikconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
index e186242..3b42f25 100755
--- a/scripts/extract-ikconfig
+++ b/scripts/extract-ikconfig
@@ -61,6 +61,7 @@ try_decompress '\3757zXZ\000' abcde unxz
try_decompress 'BZh' xy bunzip2
try_decompress '\135\0\0\0' xxx unlzma
try_decompress '\211\114\132' xy 'lzop -d'
+try_decompress '\002\041\114\030' xyy 'lz4 -d -l'

# Bail out:
echo "$me: Cannot find kernel config." >&2
--
2.3.5

2015-04-15 12:08:25

by Michal Marek

Subject: Re: [PATCH] scripts/extract-ikconfig: Support LZ4-compressed images.

On Tue, Apr 14, 2015 at 12:38:33AM -0400, Alex Pilon wrote:
> Support for kernel image LZ4 compression was added around 3.11, but not
> the corresponding kernel .config extraction.
>
> This makes possible extracting the kernel config for LZ4-compressed
> kernels you're not running, or the current LZ4-compressed kernel if
> compiled without /proc/config.gz support.
>
> Signed-off-by: Alex Pilon <[email protected]>

Applied to kbuild.git#misc.

Michal