File tls-no-direct.diff of Package gcc48

Index: gcc/config/i386/gnu-user-common.h
===================================================================
--- gcc/config/i386/gnu-user-common.h.orig	2012-12-11 12:44:53.918094370 +0100
+++ gcc/config/i386/gnu-user-common.h	2012-12-11 12:44:55.467094317 +0100
@@ -26,8 +26,12 @@ along with GCC; see the file COPYING3.
 #define DEFAULT_PCC_STRUCT_RETURN 1
 
 /* We arrange for the whole %fs segment to map the tls area.  */
+/* This slows down Xen, so take a very small general performance hit
+   for not accessing the %fs segment with negative offsets by making
+   GCC not emit direct accesses to %fs at all.
 #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
 #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
+ */
 
 #define TARGET_OS_CPP_BUILTINS()				\
   do								\