linux-kernel - Re: [PATCH] Tell modpost that any reference from .note* is OK

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Message-ID: <20070529210748.GC7738@uranus.ravnborg.org>
Date:	Tue, 29 May 2007 23:07:48 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH] Tell modpost that any reference from .note* is OK

On Tue, May 29, 2007 at 01:33:20PM -0700, Jeremy Fitzhardinge wrote:
> .note* sections are ELF notes, which are typically used by external
> tools to examine the kernel image.  Since this is removed from any
> runtime consideration, it's OK to reference any section from a .note*
> section.
> 
> As a side-effect, this changes secref_whitelist to accept a NULL "atsym"
> pointer, allowing it to be called when "before" is NULL.  This is
> needed for .note sections since they don't necessarily have any
> symbols, and it also allows the .got2 check to to be folded into the
> normal whitelist checks.

I did it a bit different. Adding .note to init_section_ref_ok +
exit_section_ref_ok is much simpler.
Next patch will move .got2 there too.

	Sam

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 662deba..b824198 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1139,6 +1139,7 @@ static int init_section_ref_ok(const char *name)
 		".debug",
 		".parainstructions",
 		".rodata",
+		".note",		/* ignore ELF notes - may contain anything */
 		NULL
 	};
 	/* part of section name */
@@ -1214,6 +1215,7 @@ static int exit_section_ref_ok(const char *name)
 	/* Start of section names */
 	const char *namelist2[] = {
 		".debug",
+		".note",		/* ignore ELF notes - may contain anything */
 		NULL
 	};
 	/* part of section name */
-
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