ArmPkg/Library/CompilerIntrinsicsLib/memset.c

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
   4 //
   5 // SPDX-License-Identifier: BSD-2-Clause-Patent
   6 //
   7 //------------------------------------------------------------------------------
   8
   9 typedef __SIZE_TYPE__ size_t;
  10
  11 static __attribute__((__used__))
  12 void *__memset(void *s, int c, size_t n)
  13 {
  14   unsigned char *d = s;
  15
  16   while (n--)
  17     *d++ = c;
  18
  19   return s;
  20 }
  21
  22 //
  23 // Other modules (such as CryptoPkg/IntrinsicLib) may provide another
  24 // implementation of memset(), which may conflict with this one if this
  25 // object was pulled into the link due to the definitions below. So make
  26 // our memset() 'weak' to let the other implementation take precedence.
  27 //
  28 __attribute__((__weak__, __alias__("__memset")))
  29 void *memset(void *dest, int c, size_t n);
  30
  31 #ifdef __arm__
  32
  33 void __aeabi_memset(void *dest, size_t n, int c)
  34 {
  35   __memset(dest, c, n);
  36 }
  37
  38 __attribute__((__alias__("__aeabi_memset")))
  39 void __aeabi_memset4(void *dest, size_t n, int c);
  40
  41 __attribute__((__alias__("__aeabi_memset")))
  42 void __aeabi_memset8(void *dest, size_t n, int c);
  43
  44 void __aeabi_memclr(void *dest, size_t n)
  45 {
  46   __memset(dest, 0, n);
  47 }
  48
  49 __attribute__((__alias__("__aeabi_memclr")))
  50 void __aeabi_memclr4(void *dest, size_t n);
  51
  52 __attribute__((__alias__("__aeabi_memclr")))
  53 void __aeabi_memclr8(void *dest, size_t n);
  54
  55 #endif