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gcc46
tls-no-direct.diff
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File tls-no-direct.diff of Package gcc46
Index: gcc/config/i386/linux.h =================================================================== --- gcc/config/i386/linux.h.orig 2010-03-26 12:58:09.000000000 +0100 +++ gcc/config/i386/linux.h 2010-07-01 16:26:38.000000000 +0200 @@ -32,8 +32,13 @@ 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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