From 775b76392371898852adaac0fa7045e23f3aea40 Mon Sep 17 00:00:00 2001
From: Aleksey Demakov <ademakov@gmail.com>
Date: Wed, 21 May 2008 08:36:29 +0000
Subject: [PATCH] use _JIT_ARCH_GET_NEXT_FRAME if defined; use gcc syntax only
 #ifdef __GNUC__

---
 ChangeLog              |  6 ++++
 include/jit/jit-walk.h | 69 +++++++++++++++++++++++++-----------------
 jit/jit-walk.c         |  2 +-
 3 files changed, 49 insertions(+), 28 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 0ac0807..2280d30 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-05-21  Aleksey Demakov  <ademakov@gmail.com>
+
+	* include/jit/jit-walk.h (jit_get_next_frame_address): use
+	JIT_ARCH_GET_NEXT_FRAME if defined, use gcc syntax only if
+	defined __GNUC__.
+
 2008-05-12  Klaus Treichel  <ktreichel@web.de>
 
 	* jit/jit-apply-x86-64.h: Include jit/jit-common.h instead of
diff --git a/include/jit/jit-walk.h b/include/jit/jit-walk.h
index 02db55c..cec87fd 100644
--- a/include/jit/jit-walk.h
+++ b/include/jit/jit-walk.h
@@ -33,10 +33,10 @@ extern	"C" {
  */
 void *_jit_get_frame_address(void *start, unsigned int n);
 #if defined(__GNUC__)
-#define	jit_get_frame_address(n)	\
+# define jit_get_frame_address(n)	\
 	(_jit_get_frame_address(jit_get_current_frame(), (n)))
 #else
-#define	jit_get_frame_address(n)	(_jit_get_frame_address(0, (n)))
+# define jit_get_frame_address(n)	(_jit_get_frame_address(0, (n)))
 #endif
 
 /*
@@ -47,66 +47,81 @@ void *_jit_get_frame_address(void *start, unsigned int n);
  * _JIT_ARCH_GET_CURRENT_FRAME() if available. 
  */
 #if defined(__GNUC__)
-#if defined(_JIT_ARCH_GET_CURRENT_FRAME)
-#define	jit_get_current_frame()				\
+# define JIT_FAST_GET_CURRENT_FRAME	1
+# if defined(_JIT_ARCH_GET_CURRENT_FRAME)
+#  define jit_get_current_frame()			\
 	({						\
 		void *address;				\
 		_JIT_ARCH_GET_CURRENT_FRAME(address);	\
 		address;				\
 	})
+# else
+#  define jit_get_current_frame()	(__builtin_frame_address(0))
+# endif
 #else
-#define	jit_get_current_frame()		(__builtin_frame_address(0))
-#endif
-#else
-#define	jit_get_current_frame()		(jit_get_frame_address(0))
+# define JIT_FAST_GET_CURRENT_FRAME	0
+# define jit_get_current_frame()	(jit_get_frame_address(0))
 #endif
 
 /*
  * Get the next frame up the stack from a specified frame.
  * Returns NULL if it isn't possible to retrieve the next frame.
  */
-void *jit_get_next_frame_address(void *frame);
+void *_jit_get_next_frame_address(void *frame);
+#if defined(__GNUC__) && defined(_JIT_ARCH_GET_NEXT_FRAME)
+# define jit_get_next_frame_address(frame)		\
+	({						\
+		void *address;				\
+		_JIT_ARCH_GET_NEXT_FRAME(address);	\
+		address;				\
+	})
+#else
+# define jit_get_next_frame_address(frame)	\
+	(_jit_get_next_frame_address(frame))
+#endif
 
 /*
  * Get the return address for a specific frame.
  */
 void *_jit_get_return_address(void *frame, void *frame0, void *return0);
-#if defined(_JIT_ARCH_GET_RETURN_ADDRESS)
-#define jit_get_return_address(frame)				\
+#if defined(__GNUC__)
+# if defined(_JIT_ARCH_GET_RETURN_ADDRESS)
+#  define jit_get_return_address(frame)				\
 	({							\
 		void *address;					\
 		_JIT_ARCH_GET_RETURN_ADDRESS(address, (frame));	\
 		address;					\
 	})
+# else
+#  define jit_get_return_address(frame)			\
+	(_jit_get_return_address			\
+		((frame),				\
+		 __builtin_frame_address(0),		\
+		 __builtin_return_address(0)))
+# endif
 #else
-#if defined(__GNUC__)
-#define	jit_get_return_address(frame)	\
-		(_jit_get_return_address	\
-			((frame), __builtin_frame_address(0), __builtin_return_address(0)))
-#else
-#define	jit_get_return_address(frame)	\
-		(_jit_get_return_address((frame), 0, 0))
-#endif
+# define jit_get_return_address(frame)	\
+	(_jit_get_return_address((frame), 0, 0))
 #endif
 
 /*
  * Get the return address for the current frame.  May be more efficient
  * than using "jit_get_return_address(0)".
  */
-#if defined(_JIT_ARCH_GET_CURRENT_RETURN)
-#define	jit_get_current_return()			\
+#if defined(__GNUC__)
+# if defined(_JIT_ARCH_GET_CURRENT_RETURN)
+#  define jit_get_current_return()			\
 	({						\
 		void *address;				\
 		_JIT_ARCH_GET_CURRENT_RETURN(address);	\
 		address;				\
 	})
+# else
+#  define jit_get_current_return()	(__builtin_return_address(0))
+# endif
 #else
-#if defined(__GNUC__)
-#define	jit_get_current_return()	(__builtin_return_address(0))
-#else
-#define	jit_get_current_return()	\
-			(jit_get_return_address(jit_get_current_frame()))
-#endif
+# define jit_get_current_return()	\
+	(jit_get_return_address(jit_get_current_frame()))
 #endif
 
 /*
diff --git a/jit/jit-walk.c b/jit/jit-walk.c
index 2e3143c..afeca6b 100644
--- a/jit/jit-walk.c
+++ b/jit/jit-walk.c
@@ -159,7 +159,7 @@ void *_jit_get_frame_address(void *start, unsigned int n)
  * the next frame up the stack.
  * @end deftypefun
 @*/
-void *jit_get_next_frame_address(void *frame)
+void *_jit_get_next_frame_address(void *frame)
 {
 	if(frame)
 	{