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On Sun, Feb 6, 2011 at 10:28 AM, Mike Frysinger <vapier@gentoo.org> wrote: > Building static apps on x86_64 systems which use memmove such as: > ? ? ? ?#include <string.h> > ? ? ? ?char buf[8192]; > ? ? ? ?main(int argc, char **argv) { memmove(buf, buf + argc, argc % 4); } You need to compile it with " -D_FORTIFY_SOURCE=1 -O" to see the error. > Result in linking errors along the lines of: > ? ? ? ?.../libc.a(memmove_chk.o): In function `__memmove_chk': > ? ? ? ?(.text+0x1b4): undefined reference to `__memmove_chk_ssse3_back' > ? ? ? ?.../libc.a(memmove_chk.o): In function `__memmove_chk': > ? ? ? ?(.text+0x1b9): undefined reference to `__memmove_chk_ssse3' > ? ? ? ?collect2: ld returned 1 exit status > > This is due to the new ssse3 funcs only enabling their chk symbols when > being compiled into shared code. > > URL: https://bugs.gentoo.org/353816 > Signed-off-by: Mike Frysinger <vapier@gentoo.org> > > 2011-02-06 ?Mike Frysinger ?<vapier@gentoo.org> > > ? ? ? ?* sysdeps/x86_64/multiarch/memcpy-ssse3.S: Delete SHARED ifdef check > ? ? ? ?around MEMCPY_CHK symbol. > ? ? ? ?* sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: Likewise. I don't think it is correct. Please try this. -- H.J. --- 2011-02-06 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/x86_64/multiarch/memcpy-ssse3-back.S (MEMCPY_CHK): Check SHARED, USE_AS_MEMMOVE and USE_MULTIARCH. * sysdeps/x86_64/multiarch/memcpy-ssse3.S (MEMCPY_CHK): Likewise.
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libc-memmove_chk-1.patch
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