linux-kernel - Re: [patch 2/2] kprobes x86

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Message-ID: <20070619100810.GA301@in.ibm.com>
Date:	Tue, 19 Jun 2007 15:38:10 +0530
From:	"S. P. Prasanna" <prasanna@...ibm.com>
To:	Andi Kleen <ak@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	linux-kernel@...r.kernel.org, ananth@...ibm.com,
	mathieu.desnoyers@...ymtl.ca
Subject: Re: [patch 2/2] kprobes x86_64 quick fix mark-ro-data

This patch is a quick fix for x86_64 to enable kprobes only if DEBUG_RODATA is
not configured. Since DEBUG_RODATA markes the kernel text pages as read-only.

Signed-off-by: Prasanna S P. <prasanna@...ibm.com>


 arch/x86_64/Kconfig |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff -puN arch/x86_64/Kconfig~kprobes-quick-fix-mark-ro-data-x86_64 arch/x86_64/Kconfig
--- linux-2.6.22-rc5/arch/x86_64/Kconfig~kprobes-quick-fix-mark-ro-data-x86_64	2007-06-19 14:55:56.000000000 +0530
+++ linux-2.6.22-rc5-prasanna/arch/x86_64/Kconfig	2007-06-19 14:55:56.000000000 +0530
@@ -764,6 +764,8 @@ source "drivers/firmware/Kconfig"
 
 source fs/Kconfig
 
+source "arch/x86_64/Kconfig.debug"
+
 menu "Instrumentation Support"
         depends on EXPERIMENTAL
 
@@ -771,7 +773,7 @@ source "arch/x86_64/oprofile/Kconfig"
 
 config KPROBES
 	bool "Kprobes (EXPERIMENTAL)"
-	depends on KALLSYMS && EXPERIMENTAL && MODULES
+	depends on KALLSYMS && EXPERIMENTAL && MODULES && !DEBUG_RODATA
 	help
 	  Kprobes allows you to trap at almost any kernel address and
 	  execute a callback function.  register_kprobe() establishes
@@ -780,8 +782,6 @@ config KPROBES
 	  If in doubt, say "N".
 endmenu
 
-source "arch/x86_64/Kconfig.debug"
-
 source "security/Kconfig"
 
 source "crypto/Kconfig"

_
-- 
Prasanna S.P.
Linux Technology Center
India Software Labs, IBM Bangalore
Email: prasanna@...ibm.com
Ph: 91-80-41776329
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