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gcc47
tls-no-direct.diff
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File tls-no-direct.diff of Package gcc47
Index: gcc/config/i386/gnu-user.h =================================================================== --- gcc/config/i386/gnu-user.h.orig 2011-05-09 17:58:22.000000000 +0200 +++ gcc/config/i386/gnu-user.h 2011-11-03 17:12:38.000000000 +0100 @@ -30,8 +30,12 @@ along with GCC; see the file COPYING3. #define DEFAULT_PCC_STRUCT_RETURN 1 /* We arrange for the whole %gs segment to map the tls area. */ +/* This slows down Xen, so take a very small general performance hit + for not accessing the %gs segment with negative offsets by making + GCC not emit direct accesses to %gs at all. #undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS + */ #undef ASM_COMMENT_START #define ASM_COMMENT_START "#"
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