Re: [PATCH 10/33] i386: Relocatable kernel support.

Mika Penttilä
2006-08-01T18:14:46Z

Eric W. Biederman wrote:
> Mika Penttilä <mika.penttila@kolumbus.fi> writes:
>
>
>>> @@ -1,9 +1,10 @@
>>> SECTIONS
>>> {
>>> - .data : { + .data.compressed : {
>>> input_len = .;
>>> LONG(input_data_end - input_data) input_data = .; *(.data)
>>> + output_len = . - 4;
>>> input_data_end = .; }
>>> }
>>>
>>>
>> I don't see how you are getting the uncompressed length from output_len...
>>
>
> It's part of the gzip format. It places the length at the end of
> the compressed data. I am just computing the address of where gzip
> put the length and putting a variable there called output_len.
>
> Isn't linker script magic wonderful :)
>
> Eric
> -
>
Huh, quite a nice trick indeed!

Thanks,
Mika