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-rw-r--r--include/libc-symbols.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index a2faeafb32..d53bcb9b77 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -1,7 +1,6 @@
 /* Support macros for making weak and strong aliases for symbols,
    and for using symbol sets and linker warnings with GNU ld.
-   Copyright (C) 1995-1998,2000-2003,2004,2005,2006
-	Free Software Foundation, Inc.
+   Copyright (C) 1995-1998, 2000-2006, 2008 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -835,4 +834,15 @@ for linking")
 # define compat_data_section .section ".data.compat", "aw";
 #endif
 
+/* Marker used for indirection function symbols.  */
+#define libc_ifunc(name, expr)						\
+  extern void *name##_ifunc (void) __asm__ (#name);			\
+  void *name##_ifunc (void)						\
+  {									\
+    INIT_ARCH ();							\
+    __typeof (name) *res = expr;					\
+    return res;								\
+  }									\
+  __asm__ (".type " #name ", %gnu_indirect_function");
+
 #endif /* libc-symbols.h */