Re: RFC: killing ksyms.c

Adrian Bunk
2008-08-11T15:05:49Z

On Mon, Aug 11, 2008 at 04:06:43PM +0200, Arnd Bergmann wrote:
> I saw this conversation on IRC when I came back to my screen, and
> managed to dig out an older patch of mine:
>
> [19:03:13] <willy> at some point we really need to forbid that
> [19:03:28] <willy> bit hard at this point with things like memcpy()
> [19:04:36] <willy> could do it with a script of some kind and
> either a whitelist of filenames (arch/*/kernel/ksyms.c
> can export anything) or of functions (anywhere can
> EXPORT_SYMBOL(memcpy)).
> [Sun Aug 10 2008] [19:07:35] <viro> I suspect that we really want
> to teach *.S how to do exports
> [Sun Aug 10 2008] [19:07:58] <viro> and kill ksyms.c
> [Sun Aug 10 2008] [19:12:47] <dwmw2_gone> if we do the -fwhole-program
> --combine thing we'll make it hard anyway
>
> I compile-tested this on powerpc, 32 and 64 bit, and it should be usable as
> an example for other architectures.
> The idea is to provide an EXPORT_SYMBOL macro for assembly that
> behaves in the same way as the C version, and then export every
> symbol from the file that defines it.
>...

On some architectures the kernel is linked with libgcc and symbols from
libgcc are EXPORT_SYMBOL'ed.

> Arnd <><

cu
Adrian

--

"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed