discarded `.exit.text' debugging?

discarded `.exit.text' debugging?

[Geert Uytterhoeven]

Last night I got these in my build logs:

| `.exit.text' referenced in section `.init.text' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
| `.exit.text' referenced in section `.data' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o

i.e. not much context. Is there an easy way to find out who's the
offender?

Thx!

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

Re: discarded `.exit.text' debugging?

[linux-os (Dick Johnson)]

On Mon, 20 Oct 2008, Geert Uytterhoeven wrote:

> Last night I got these in my build logs:
>
> | `.exit.text' referenced in section `.init.text' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
> | `.exit.text' referenced in section `.data' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
>
> i.e. not much context. Is there an easy way to find out who's the
> offender?
>
> Thx!
>
> Gr{oetje,eeting}s,
>
> 						Geert
>

Look in .built-in.o.cmd for the files included in that object
file. It's a start. Something like

../drivers/scsi/aic7xxx/aicasm/aicasm_symbol.c

With an exit(EX_SOFTWARE) or similar that was not supposed to
be included in the kernel build because it is for user-mode
build code.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.25.17 on an i686 machine (4787.24 BogoMips).
My book : http://www.AbominableFirebug.com/
_


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Thank you.

Re: discarded `.exit.text' debugging?

[Andreas Schwab]

Geert Uytterhoeven <geert@linux-m68k.org> writes:

> Last night I got these in my build logs:
>
> | `.exit.text' referenced in section `.init.text' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
> | `.exit.text' referenced in section `.data' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
>
> i.e. not much context. Is there an easy way to find out who's the
> offender?

You could try giving each .exit.text section a unique name per object
file (so that "ld -r" does not merge them) and modify EXIT_TEXT to
collect all those sections during the final link.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: discarded `.exit.text' debugging?

[Geert Uytterhoeven]

On Mon, 20 Oct 2008, Geert Uytterhoeven wrote:
> Last night I got these in my build logs:
> 
> | `.exit.text' referenced in section `.init.text' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
> | `.exit.text' referenced in section `.data' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o
> 
> i.e. not much context. Is there an easy way to find out who's the
> offender?

I also didn't get any section mismatch warnings about them with
CONFIG_DEBUG_SECTION_MISMATCH=y.

So I went the hard way (i.e. maual bisection on CONFIG symbols) and found 2
bogus __exit marks in drivers/rtc/rtc-ds3234.c and drivers/hwmon/w83781d.c.

Patches to fix them have been sent.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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