From fc150ea960d6ce20bf35f602b413f664e9b185ae Mon Sep 17 00:00:00 2001
From: Hynek Cernoch <hynek@sdb.cz>
Date: Mon, 13 Dec 2010 22:33:05 +0100
Subject: [PATCH] Give hint about uncompressed kernels

---
 smem | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/smem b/smem
index da7f5fc..f7bfe0f 100755
--- a/smem
+++ b/smem
@@ -115,7 +115,16 @@ def kernelsize():
             d = os.popen("size %s" % options.kernel).readlines()[1]
             _kernelsize = int(d.split()[3]) / 1024
         except:
-            pass
+            try:
+                # try some heuristic to find gzipped part in kernel image
+                packedkernel = open(options.kernel).read()
+                pos = packedkernel.find('\x1F\x8B')
+                if pos >= 0 and pos < 25000:
+                    sys.stderr.write("Maybe uncompressed kernel can be extracted by the command:\n"
+                            "  dd if=%s bs=1 skip=%d | gzip -d >%s.unpacked\n\n" % (options.kernel, pos, options.kernel))
+            except:
+                pass
+            sys.stderr.write("Parameter '%s' should be an original uncompressed compiled kernel file.\n\n" % options.kernel)
     return _kernelsize
 
 def pidmaps(pid):