sh: Add kprobes support.

Initial support for kprobes/kretprobes for 32-bit SH platforms.

[ General cleanup and some rework for the kretprobe hash lock. -- PFM ]

Signed-off-by: Chris Smith <chris.smith@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 4901f6732162..862667a341fd 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -26,6 +26,7 @@
 #include <asm/system.h>
 #include <asm/uaccess.h>
 #include <asm/fpu.h>
+#include <asm/kprobes.h>
 
 #ifdef CONFIG_SH_KGDB
 #include <asm/kgdb.h>
@@ -743,6 +744,10 @@ asmlinkage void do_illegal_slot_inst(unsigned long r4, unsigned long r5,
         struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
         unsigned long error_code;
         struct task_struct *tsk = current;
+
+        if (kprobe_handle_illslot(regs->pc) == 0)
+                return;
+
 #ifdef CONFIG_SH_FPU_EMU
         unsigned short inst = 0;