[Bug libc/12113] Segmentation fault in dynamic loader on AVX enabled OS and CPU with AVX

["hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12113

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-13 11:06:46 UTC ---
nptl/sysdeps/x86_64/tls.h has

# if __WORDSIZE == 64
  long int __unused2;
  /* Have space for the post-AVX register size.  */
  __m128 rtld_savespace_sse[8][4];

  void *__padding[8];
# endif
} tcbhead_t;

sysdeps/x86_64/dl-trampoline.S has

        vmovdqa %ymm0, %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE
        vmovdqa %ymm1, %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE
        vmovdqa %ymm2, %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE
        vmovdqa %ymm3, %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE
        vmovdqa %ymm4, %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE
        vmovdqa %ymm5, %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE
        vmovdqa %ymm6, %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE
        vmovdqa %ymm7, %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE
...
        vmovdqa %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE, %ymm0
        vmovdqa %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE, %ymm1
        vmovdqa %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE, %ymm2
        vmovdqa %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE, %ymm3
        vmovdqa %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE, %ymm4
        vmovdqa %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE, %ymm5
        vmovdqa %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE, %ymm6
        vmovdqa %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE, %ymm7

But rtld_savespace_sse may not be aligned at 32byte.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.