convert vmlinuz to vmlinux

this is a way. actually, oprofile needs symbols in vmlinux. but they were stripped when converted from vmlinux to vmlinuz to save space. so there will be no use at all.


The vmlinuz isn't just the compressed kernel, it's complete bootable image including the decompressor. To get just the image search for the GZ signature - 1f 8b 08 00. Now i'm sure there are scripts for it somewhere, but you can do it old-fashioned way - in my case:

> od -A d -t x1 vmlinuz | grep '1f 8b 08 00'
0024576 24 26 27 00 ae 21 16 00 1f 8b 08 00 7f 2f 6b 45

so the image begins at 24576+8 => 24584 . Then just copy the image from the point and decompress it -

>dd if=vmlinuz bs=1 skip=24584 | zcat > vmlinux
1450414+0 records in
1450414+0 records out
1450414 bytes (1.5 MB) copied, 6.78127 s, 214 kB/s

in reference to:

"The vmlinuz isn't just the compressed kernel, it's complete bootable image including the decompressor. To get just the image search for the GZ signature - 1f 8b 08 00. Now i'm sure there are scripts for it somewhere, but you can do it old-fashioned way - in my case: > od -A d -t x1 vmlinuz | grep '1f 8b 08 00' 0024576 24 26 27 00 ae 21 16 00 1f 8b 08 00 7f 2f 6b 45 so the image begins at 24576+8 => 24584 . Then just copy the image from the point and decompress it - >dd if=vmlinuz bs=1 skip=24584 | zcat > vmlinux 1450414+0 records in 1450414+0 records out 1450414 bytes (1.5 MB) copied, 6.78127 s, 214 kB/s"
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