On Mon, Oct 21, 2013 at 9:55 PM, Geert Uytterhoeven
<[email protected]> wrote:
> As I also got complaints about overlapping sections from strip, I switched
> from the good old gcc 4.1.2 20061115 (prerelease) (Ubuntu 4.1.1-21)
> and binutils 2.18.0.20080103 to gcc 4.6.3 and binutils 2.22, but apart
> from fixing the overlapping sections, it still didn't work.
Binutils 2.18 is indeed buggy here. LMA of the data section is the same
as LMA of the __modver section, despite the correct __modver size due
to the ". = ALIGN((align))" at the end of the section (see
include/asm-generic/vmlinux.lds.h):
Idx Name Size VMA LMA File off Algn
7 __modver 000003f8 0034dc08 0034dc08 0034dc08 2**0
ALLOC
8 .data 00020ae0 0034e000 0034dc08 0034dc08 2**4
CONTENTS, ALLOC, LOAD, DATA
So that's where the overlap warning comes from.
And the resulting kernel crashes on ARAnyM after
| Blitter tried to read byte from register ff8a00 at 0075ea
With binutils 2.22/2.23.2, .data is correctly aligned:
7 __modver 000003f8 0034dc08 0034dc08 0034dc08 2**0
ALLOC
8 .data 00020ae0 0034e000 0034e000 0034e000 2**4
CONTENTS, ALLOC, LOAD, DATA
and it seems to work fine on ARAnyM.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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