sysdeps/aarch64/multiarch/strlen_generic.S

   1 /* A Generic Optimized strlen implementation for AARCH64.
   2    Copyright (C) 2018-2019 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 /* The actual strlen code is in ../strlen.S.  If we are building libc this file
  20    defines __strlen_generic.  Otherwise the include of ../strlen.S will define
  21    the normal __strlen  entry points.  */
  22
  23 #include <sysdep.h>
  24
  25 #if IS_IN (libc)
  26
  27 # define STRLEN __strlen_generic
  28
  29 /* Do not hide the generic version of strlen, we use it internally.  */
  30 # undef libc_hidden_builtin_def
  31 # define libc_hidden_builtin_def(name)
  32
  33 # ifdef SHARED
  34 /* It doesn't make sense to send libc-internal strlen calls through a PLT. */
  35         .globl __GI_strlen; __GI_strlen = __strlen_generic
  36 # endif
  37 #endif
  38
  39 #include "../strlen.S"