Messages in this thread | | | Date | Wed, 20 May 2015 13:32:05 -0700 | From | "H. Peter Anvin" <> | Subject | Re: RFC: Add -mshared option to x86 ELF assembler |
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On 05/20/2015 01:02 PM, Andy Lutomirski wrote: >> >> I got >> >> [hjl@gnu-tools-1 kernel.org]$ readelf -r old/vmlinux.o | head -5 >> >> Relocation section '.rela.text' at offset 0xafea2f0 contains 205717 entries: >> Offset Info Type Sym. Value Sym. Name + Addend >> 000000000001 1253100000002 R_X86_64_PC32 0000000000001e70 __fentry__ - 4 >> 000000000009 1c8c00000002 R_X86_64_PC32 0000000000000000 .data + 51bc >> [hjl@gnu-tools-1 kernel.org]$ readelf -r new/vmlinux.o | head -5 >> >> Relocation section '.rela.text' at offset 0xafea280 contains 205711 entries: >> Offset Info Type Sym. Value Sym. Name + Addend >> 000000000001 1253100000002 R_X86_64_PC32 0000000000001e70 __fentry__ - 4 >> 000000000009 1c8c00000002 R_X86_64_PC32 0000000000000000 .data + 51bc >> [hjl@gnu-tools-1 kernel.org]$ >> >> It removes 6 relocations. On gcc master branch, >> >> [hjl@gnu-tools-1 gcc-misc]$ size build-x86_64-linux*/gcc/cc1 >> text data bss dec hex filename >> 21529621 62256 1348312 22940189 15e0a1d build-x86_64-linux.branch/gcc/cc1 >> 21529749 62256 1348312 22940317 15e0a9d build-x86_64-linux/gcc/cc1 >> [hjl@gnu-tools-1 gcc-misc]$ size build-x86_64-linux*/gcc/cc1plus >> text data bss dec hex filename >> 23713509 62400 1372760 25148669 17fbcfd build-x86_64-linux.branch/gcc/cc1plus >> 23713669 62400 1372760 25148829 17fbd9d build-x86_64-linux/gcc/cc1plus >> [hjl@gnu-tools-1 gcc-misc]$ >> >> It is more effective. I will run more tests. > > This seems like a sensible idea, but I can imagine it breaking some > weird use cases (like that one Linux thing). Is that okay? >
What about the patch I posted recently?
-hpa
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