Displaying 3 results from an estimated 3 matches for "defla".
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defa
2019 Jun 08
2
Kernel Image CRC checking
...ecked: the spec is correct. So the zlib crc32() routine should
> return UINT32_MAX == ~(uint32_t)0 == (uint32_t)-1 for a correctly loaded kernel.
>
And just to double check:
gzip -9 bzImage
gzip -l -v bzImage.gz
method crc date time compressed uncompressed ratio uncompressed_name
defla ffffffff Jun 7 22:53 728000 881200 17.4% bzImage
^^^^^^^^
-hpa
2019 Jun 09
0
Kernel Image CRC checking
...)
> > routine should return UINT32_MAX == ~(uint32_t)0 == (uint32_t)-1
> > for a correctly loaded kernel.
>
> And just to double check:
>
>
> gzip -9 bzImage
> gzip -l -v bzImage.gz
> method crc date time compressed uncompressed ratio
> uncompressed_name defla ffffffff Jun 7 22:53 728000
> 881200 17.4% bzImage ^^^^^^^^
>
> -hpa
Unfortunately you have to account for kernel signing.
Let's check this kernel distributed by openSUSE:
gzip vmlinuz-5.2.0-rc1-2.gb225e5a-default
gzip -l -v vmlinuz-5.2.0-rc1-2.gb225e5a-default.gz
method crc...
2019 Jun 08
2
Kernel Image CRC checking
On 6/7/19 10:25 PM, H. Peter Anvin via Syslinux wrote:
>>
>> However, the CRC polynomial for zlib and the Linux kernel should both be the
>> same: 0x04c11db7.
>
> I just double-checked, and the CRC tables are indeed identical. I was pretty
> sure, because I wrote that code a long time ago...
>
Ah, it seems that zlib's CRC32 returns the binary inverse of the