sh: kprobes: Hook up kprobe_fault_handler() in the page fault path.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index e8efda9..659811c 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -2,7 +2,7 @@
* Page fault handler for SH with an MMU.
*
* Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2003 - 2007 Paul Mundt
+ * Copyright (C) 2003 - 2008 Paul Mundt
*
* Based on linux/arch/i386/mm/fault.c:
* Copyright (C) 1995 Linus Torvalds
@@ -21,6 +21,27 @@
#include <asm/tlbflush.h>
#include <asm/kgdb.h>
+#ifdef CONFIG_KPROBES
+static inline int notify_page_fault(struct pt_regs *regs, int trap)
+{
+ int ret = 0;
+
+ if (!user_mode(regs)) {
+ preempt_disable();
+ if (kprobe_running() && kprobe_fault_handler(regs, trap))
+ ret = 1;
+ preempt_enable();
+ }
+
+ return ret;
+}
+#else
+static inline int notify_page_fault(struct pt_regs *regs, int trap)
+{
+ return 0;
+}
+#endif
+
/*
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
@@ -37,6 +58,9 @@
int fault;
siginfo_t info;
+ if (notify_page_fault(regs, writeaccess))
+ return;
+
#ifdef CONFIG_SH_KGDB
if (kgdb_nofault && kgdb_bus_err_hook)
kgdb_bus_err_hook();
@@ -269,6 +293,9 @@
pte_t *pte;
pte_t entry;
+ if (notify_page_fault(regs, writeaccess))
+ return 0;
+
#ifdef CONFIG_SH_KGDB
if (kgdb_nofault && kgdb_bus_err_hook)
kgdb_bus_err_hook();