sysdeps/i386/i686/multiarch/mempcpy_chk.S

   1 /* Multiple versions of __mempcpy_chk
   2    Copyright (C) 2010, 2012 Free Software Foundation, Inc.
   3    Contributed by Intel Corporation.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <sysdep.h>
  22 #include <init-arch.h>
  23
  24 /* Define multiple versions only for the definition in lib and for
  25    DSO.  There are no multiarch mempcpy functions for static binaries.
  26  */
  27 #ifndef NOT_IN_libc
  28 # ifdef SHARED
  29         .text
  30 ENTRY(__mempcpy_chk)
  31         .type   __mempcpy_chk, @gnu_indirect_function
  32         pushl   %ebx
  33         cfi_adjust_cfa_offset (4)
  34         cfi_rel_offset (ebx, 0)
  35         LOAD_PIC_REG(bx)
  36         cmpl    $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
  37         jne     1f
  38         call    __init_cpu_features
  39 1:      leal    __mempcpy_chk_ia32@GOTOFF(%ebx), %eax
  40         testl   $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
  41         jz      2f
  42         leal    __mempcpy_chk_ssse3@GOTOFF(%ebx), %eax
  43         testl   $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
  44         jz      2f
  45         leal    __mempcpy_chk_ssse3_rep@GOTOFF(%ebx), %eax
  46 2:      popl    %ebx
  47         cfi_adjust_cfa_offset (-4)
  48         cfi_restore (ebx)
  49         ret
  50 END(__mempcpy_chk)
  51 # else
  52 #  include "../mempcpy_chk.S"
  53 # endif
  54 #endif