Re: [PATCH 3/4] perf symbols: Record the build_ids of kernel modules too

[Arnaldo Carvalho de Melo <acme@infradead.org>]

Em Wed, Nov 18, 2009 at 02:29:10PM -0800, Roland McGrath escreveu:
> > +		snprintf(name, sizeof(name),
> > +			 "/sys/module/%s/notes/.note.gnu.build-id", line);
> 
> The arch linker script for .ko's is free to fold notes into a single
> section with a different name or suchlike, and maybe future ones will.  So
> it's not pedantically kosher to assume the name of the section rather than
> just looking at all the /sys/module/%s/notes/* files present until you find
> NT_GNU_BUILD_ID.  (In practice there is probably only ever one file there
> to look at, but you never know.)

Ahah! That seems to explain why the kernel one is "notes" while the
modules's are ".note.gnu.build-id"! I'll cook a super-dupa-careful
cooker follow on patch to get that right, thanks again!

- Arnaldo