ArmPkg/Library/CompilerIntrinsicsLib/memset.c

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
   4 //
   5 // This program and the accompanying materials are licensed and made
   6 // available under the terms and conditions of the BSD License which
   7 // accompanies this distribution.  The full text of the license may be
   8 // found at http://opensource.org/licenses/bsd-license.php
   9 //
  10 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
  12 // IMPLIED.
  13 //
  14 //------------------------------------------------------------------------------
  15
  16 typedef __SIZE_TYPE__ size_t;
  17
  18 static __attribute__((__used__))
  19 void *__memset(void *s, int c, size_t n)
  20 {
  21   unsigned char *d = s;
  22
  23   while (n--)
  24     *d++ = c;
  25
  26   return s;
  27 }
  28
  29 //
  30 // Other modules (such as CryptoPkg/IntrinsicLib) may provide another
  31 // implementation of memset(), which may conflict with this one if this
  32 // object was pulled into the link due to the definitions below. So make
  33 // our memset() 'weak' to let the other implementation take precedence.
  34 //
  35 __attribute__((__weak__, __alias__("__memset")))
  36 void *memset(void *dest, int c, size_t n);
  37
  38 #ifdef __arm__
  39
  40 void __aeabi_memset(void *dest, size_t n, int c)
  41 {
  42   __memset(dest, c, n);
  43 }
  44
  45 __attribute__((__alias__("__aeabi_memset")))
  46 void __aeabi_memset4(void *dest, size_t n, int c);
  47
  48 __attribute__((__alias__("__aeabi_memset")))
  49 void __aeabi_memset8(void *dest, size_t n, int c);
  50
  51 void __aeabi_memclr(void *dest, size_t n)
  52 {
  53   __memset(dest, 0, n);
  54 }
  55
  56 __attribute__((__alias__("__aeabi_memclr")))
  57 void __aeabi_memclr4(void *dest, size_t n);
  58
  59 __attribute__((__alias__("__aeabi_memclr")))
  60 void __aeabi_memclr8(void *dest, size_t n);
  61
  62 #endif