1 files changed, 17 insertions, 0 deletions
diff --git a/src/include/compiler.h b/src/include/compiler.h
index 4fe4f025d..df0a01a6e 100644
--- a/src/include/compiler.h
+++ b/src/include/compiler.h
@@ -71,6 +71,23 @@ __asm__ ( ".equ\tDEBUG_LEVEL, " DEBUG_SYMBOL_STR );
 #define __unused __attribute__((unused))
 #define __used __attribute__((used))
 
+/*
+ * To save space in the binary when multiple-driver images are
+ * compiled, uninitialised data areas can be shared between drivers.
+ * This will typically be used to share statically-allocated receive
+ * and transmit buffers between drivers.
+ *
+ * Use as e.g.
+ *
+ *  struct {
+ *	char	rx_buf[NUM_RX_BUF][RX_BUF_SIZE];
+ *	char	tx_buf[TX_BUF_SIZE];
+ *  } my_static_data __shared;
+ *
+ */
+
+#define __shared __asm__ ( "_shared_bss" );
+
 #endif /* ASSEMBLY */
 
 #endif /* COMPILER_H */