sysdeps/x86_64/wmemset_chk.S

   1 /* Checking wmemset for x86-64.
   2    Copyright (C) 2004-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include "asm-syntax.h"
  21
  22 #ifndef SHARED
  23         /* For libc.so this is defined in wmemset.S.
  24            For libc.a, this is a separate source to avoid
  25            wmemset bringing in __chk_fail and all routines
  26            it calls.  */
  27         .text
  28 ENTRY (__wmemset_chk)
  29         cmpq    %rdx, %rcx
  30         jb      __chk_fail
  31         jmp     wmemset
  32 END (__wmemset_chk)
  33 #endif