Re: [PATCH][RFC] 2.6 && module + -g && kernel w/o -g

[Rusty Russell <rusty@rustcorp.com.au>]

In message <20040114210937.GA983@stop.crashing.org> you write:
> Okay.  I've been looking at stock 2.6.1 noticed  that the fix for this
> issue that Rusty proposed, and that ultimately made it into 2.6.1-rc3
> (or so) is not correct.  The problem is that we do:
> 
> err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod);
> /* Which goes over every .debug section and can take _ages_ on something
>  * like ipv6 */

Right.  So the arch-specific module_frob_arch_sections() can be slow.
Logically, the fix should be in those module_frob_arch_sections(), not
in the generic code.

> +		/* If we find any debug RELAs, frob these away now. */
> +		if (sechdrs[i].sh_type == SHT_RELA &&
> +				(strstr(secstrings+sechdrs[i].sh_name, ".debug")
> +				 != 0))
> +			sechdrs[i].sh_type = SHT_NULL;
> +

Doesn't cover SHT_REL, and I really dislike name matches: they've bitten
us before.

Really, I prefer the arch-specific optimization.
Rusty.
--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.