sh: dynamic ftrace support.

First cut at dynamic ftrace support.

Signed-off-by: Matt Fleming <mjf@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/sh/include/asm/ftrace.h b/arch/sh/include/asm/ftrace.h
index 3aed362c9463..4cb5dbfc404a 100644
--- a/arch/sh/include/asm/ftrace.h
+++ b/arch/sh/include/asm/ftrace.h
@@ -1,8 +1,29 @@
 #ifndef __ASM_SH_FTRACE_H
 #define __ASM_SH_FTRACE_H
 
+#ifdef CONFIG_FUNCTION_TRACER
+
+#define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
+
 #ifndef __ASSEMBLY__
 extern void mcount(void);
+
+#define MCOUNT_ADDR             ((long)(mcount))
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+#define CALLER_ADDR             ((long)(ftrace_caller))
+#define STUB_ADDR               ((long)(ftrace_stub))
+
+#define MCOUNT_INSN_OFFSET      ((STUB_ADDR - CALLER_ADDR) >> 1)
+#endif
+
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+        /* 'addr' is the memory table address. */
+        return addr;
+}
 #endif
 
+#endif /* CONFIG_FUNCTION_TRACER */
+
 #endif /* __ASM_SH_FTRACE_H */