linux-kernel - Re: [PATCH 1/2] strip generated symbols from *.ko

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Message-ID: <20081218201311.GA16647@uranus.ravnborg.org>
Date:	Thu, 18 Dec 2008 21:13:11 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Jan Beulich <jbeulich@...ell.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] strip generated symbols from *.ko

On Tue, Dec 16, 2008 at 11:28:14AM +0000, Jan Beulich wrote:
> This patch changes the way __crc_ symbols are being resolved from
> using ld to do so to using the assembler, thus allowing these symbols
> to be marked local (the linker creates then as global ones) and hence
> allow stripping (for modules) or ignoring (for vmlinux) them. While at
> this, also strip other generated symbols during module installation.
> 
> One potentially debatable point is the handling of the flags passeed
> to gcc when translating the intermediate assembly file into an object:
> passing $(c_flags) unchanged doesn't work as gcc passes --gdwarf2 to
> gas whenever is sees any -g* option, even for -g0, and despite the
> fact that the compiler would have already produced all necessary debug
> info in the C->assembly translation phase. I took the approach of just
> filtering out all -g* options, but an alternative to such negative
> filtering might be to have a positive filter which might, in the ideal
> case allow just all the -Wa,* options to pass through.
> 
> Signed-off-by: Jan Beulich <jbeulich@...ell.com>

Both patches are encoded so I end up with "=20", "=3D" in the saved file.
Can you please resend as attachment or fix your mailer.

Thanks,
	Sam
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