linux-kernel - [PATCH] Immediate Values - Move Kprobes i386 restore

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Date:	Sat, 14 Jul 2007 19:04:09 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Cc:	prasanna@...ibm.com, ananth@...ibm.com,
	anil.s.keshavamurthy@...el.com, davem@...emloft.net,
	Christoph Hellwig <hch@...radead.org>
Subject: [PATCH] Immediate Values - Move Kprobes i386 restore_interrupt to kdebug.h

Immediate Values - Move Kprobes i386 restore_interrupt to kdebug.h

Since the breakpoint handler is useful both to kprobes and immediate values, it
makes sense to make the required restore_interrupt() available through
asm-i386/kdebug.h.

This patch replaces "immediate-values-kprobes-headers.patch".

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
CC: Christoph Hellwig <hch@...radead.org>
CC: prasanna@...ibm.com
CC: ananth@...ibm.com
CC: anil.s.keshavamurthy@...el.com
CC: davem@...emloft.net
---
 include/asm-i386/kdebug.h  |   10 ++++++++++
 include/asm-i386/kprobes.h |    9 ---------
 2 files changed, 10 insertions(+), 9 deletions(-)

Index: linux-2.6-lttng/include/asm-i386/kdebug.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-i386/kdebug.h	2007-07-14 18:32:56.000000000 -0400
+++ linux-2.6-lttng/include/asm-i386/kdebug.h	2007-07-14 18:37:32.000000000 -0400
@@ -6,6 +6,7 @@
  * from x86_64 architecture.
  */
 #include <linux/notifier.h>
+#include <asm/ptrace.h>
 
 struct pt_regs;
 
@@ -31,4 +32,13 @@ enum die_val {
 	DIE_PAGE_FAULT_NO_CONTEXT,
 };
 
+/* trap3/1 are intr gates for kprobes.  So, restore the status of IF,
+ * if necessary, before executing the original int3/1 (trap) handler.
+ */
+static inline void restore_interrupts(struct pt_regs *regs)
+{
+	if (regs->eflags & IF_MASK)
+		local_irq_enable();
+}
+
 #endif
Index: linux-2.6-lttng/include/asm-i386/kprobes.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-i386/kprobes.h	2007-07-14 18:32:52.000000000 -0400
+++ linux-2.6-lttng/include/asm-i386/kprobes.h	2007-07-14 18:33:59.000000000 -0400
@@ -80,15 +80,6 @@ struct kprobe_ctlblk {
 	struct prev_kprobe prev_kprobe;
 };
 
-/* trap3/1 are intr gates for kprobes.  So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
-	if (regs->eflags & IF_MASK)
-		local_irq_enable();
-}
-
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);
 extern int kernel_text_is_ro;
-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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