Add support for dynamic debug feature

1 files changed, 17 insertions, 1 deletions

diff --git a/include/log.h b/include/log.h
index 67014ad3..d1fef7b6 100644
--- a/include/log.h
+++ b/include/log.h
@@ -41,6 +41,14 @@ extern void ofono_error(const char *format, ...)
 extern void ofono_debug(const char *format, ...)
 				__attribute__((format(printf, 1, 2)));
 
+struct ofono_debug_desc {
+	const char *name;
+	const char *file;
+#define OFONO_DEBUG_FLAG_DEFAULT (0)
+#define OFONO_DEBUG_FLAG_PRINT   (1 << 0)
+	unsigned int flags;
+} __attribute__((aligned(8)));
+
 /**
  * DBG:
  * @fmt: format string
@@ -49,7 +57,15 @@ extern void ofono_debug(const char *format, ...)
  * Simple macro around ofono_debug() which also include the function
  * name it is called in.
  */
-#define DBG(fmt, arg...) ofono_debug("%s:%s() " fmt, __FILE__, __FUNCTION__ , ## arg)
+#define DBG(fmt, arg...) do { \
+	static struct ofono_debug_desc __ofono_debug_desc \
+	__attribute__((used, section("__debug"), aligned(8))) = { \
+		.file = __FILE__, .flags = OFONO_DEBUG_FLAG_DEFAULT, \
+	}; \
+	if (__ofono_debug_desc.flags & OFONO_DEBUG_FLAG_PRINT) \
+		ofono_debug("%s:%s() " fmt, \
+					__FILE__, __FUNCTION__ , ## arg); \
+} while (0)
 
 #ifdef __cplusplus
 }