Introduce RECLAIM_INIT_CODE build flag
This patch introduces a build flag "RECLAIM_INIT_CODE" to mark boot time
code which allows platforms to place this memory in an appropriate
section to be reclaimed later. This features is primarily targeted for
BL31. Appropriate documentation updates are also done.
Change-Id: If0ca062851614805d769c332c771083d46599194
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
diff --git a/include/lib/libc/cdefs.h b/include/lib/libc/cdefs.h
index b1d10cc..0d00722 100644
--- a/include/lib/libc/cdefs.h
+++ b/include/lib/libc/cdefs.h
@@ -14,6 +14,15 @@
#define __unused __attribute__((__unused__))
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
+#if RECLAIM_INIT_CODE
+/*
+ * Add each function to a section that is unique so the functions can still
+ * be garbage collected
+ */
+#define __init __section(".text.init." __FILE__ "." __XSTRING(__LINE__))
+#else
+#define __init
+#endif
#define __printflike(fmtarg, firstvararg) \
__attribute__((__format__ (__printf__, fmtarg, firstvararg)))