From: Andreas Schwab <schwab@redhat.com>
Date: Wed, 21 Oct 2009 13:23:42 +0000 (-0700)
Subject: Handle IFUNC symbols in dlsym.
X-Git-Tag: upstream/2.30~13266^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bc5e8462188bdd9919e804fbba44e4b983b7724a;p=external%2Fglibc.git

Handle IFUNC symbols in dlsym.
---

diff --git a/ChangeLog b/ChangeLog
index 2857d88..ccbb625 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-10-21  Andreas Schwab  <schwab@redhat.com>
+
+	* elf/dl-sym.c (do_sym): Resolve STT_GNU_IFUNC symbols.
+
 2009-10-19  Andreas Schwab  <schwab@redhat.com>
 
 	* include/math.h: Add hidden protos for __exp/__expf/__expl.
diff --git a/elf/dl-sym.c b/elf/dl-sym.c
index 740bb9a..459729f 100644
--- a/elf/dl-sym.c
+++ b/elf/dl-sym.c
@@ -191,6 +191,11 @@ RTLD_NEXT used in code not dynamically loaded"));
 #endif
 	value = DL_SYMBOL_ADDRESS (result, ref);
 
+      /* Resolve indirect function address.  */
+      if (__builtin_expect (ELFW(ST_TYPE) (ref->st_info) == STT_GNU_IFUNC, 0))
+	value
+	  = ((DL_FIXUP_VALUE_TYPE (*) (void)) DL_FIXUP_VALUE_ADDR (value)) ();
+
 #ifdef SHARED
       /* Auditing checkpoint: we have a new binding.  Provide the
 	 auditing libraries the possibility to change the value and