From 3fa17c395bb0c358745fbe0c8aa039d6cdac1735 Mon Sep 17 00:00:00 2001
From: Tony Lu <zlu@tilera.com>
Date: Fri, 9 Aug 2013 15:08:57 -0400
Subject: tile: support kprobes on tilegx

This change includes support for Kprobes, Jprobes and Return Probes.

Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Tony Lu <zlu@tilera.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---
 arch/tile/mm/fault.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'arch/tile/mm/fault.c')

diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index 502664ae1e6e..64eec3f9584f 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -34,6 +34,7 @@
 #include <linux/hugetlb.h>
 #include <linux/syscalls.h>
 #include <linux/uaccess.h>
+#include <linux/kdebug.h>
 
 #include <asm/pgalloc.h>
 #include <asm/sections.h>
@@ -721,6 +722,17 @@ void do_page_fault(struct pt_regs *regs, int fault_num,
 {
 	int is_page_fault;
 
+#ifdef CONFIG_KPROBES
+	/*
+	 * This is to notify the fault handler of the kprobes.  The
+	 * exception code is redundant as it is also carried in REGS,
+	 * but we pass it anyhow.
+	 */
+	if (notify_die(DIE_PAGE_FAULT, "page fault", regs, -1,
+		       regs->faultnum, SIGSEGV) == NOTIFY_STOP)
+		return;
+#endif
+
 #ifdef __tilegx__
 	/*
 	 * We don't need early do_page_fault_ics() support, since unlike
-- 
cgit