On Wed, 25 Jan 2017, Joe Perches wrote:

> On Wed, 2017-01-25 at 07:49 +0100, Julia Lawall wrote:
> > What does the data column actually represent?  I tried size on the .o file
> > generated from:
> >
> > commit a65f0161f4d69d6738d4821e649448312cd818e2
> > Author: Stephen Rothwell <s...@canb.auug.org.au>
> > Date:   Tue Jan 17 15:22:28 2017 +1100
> >
> > with CONFIG_X86_64=y and I get:
> >
> >    text        data     bss     dec     hex filename
> >   19726        3480      16   23222    5ab6 drivers/nvdimm/namespace_devs.o
> >
> > but when I run objdump -sh drivers/nvdimm/namespace_devs.o, I find a .data
> > segment of size 1008 and a .data.unlikely segment of size 8, which don't
> > match up with the results of size.
>
> Likely you have dynamic_debug enabled and you
> need to include these additional sections:
>
>       __jump_table
>       __verbose
>
> If user_mode_linux is enabled, add sections:
>
>       .fini_array
>       .init_array

Ah, thanks for the explanations.

julia

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