ArmPkg/Library/CompilerIntrinsicsLib/memset.c

   1 // ------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
   4 // Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
   5 //
   6 // SPDX-License-Identifier: BSD-2-Clause-Patent
   7 //
   8 // ------------------------------------------------------------------------------
   9
  10 typedef __SIZE_TYPE__ size_t;
  11
  12 static __attribute__ ((__used__))
  13 void *
  14 __memset (
  15   void    *s,
  16   int     c,
  17   size_t  n
  18   )
  19 {
  20   unsigned char  *d;
  21
  22   d = s;
  23
  24   while (n-- != 0) {
  25     *d++ = c;
  26   }
  27
  28   return s;
  29 }
  30
  31 //
  32 // Other modules (such as CryptoPkg/IntrinsicLib) may provide another
  33 // implementation of memset(), which may conflict with this one if this
  34 // object was pulled into the link due to the definitions below. So make
  35 // our memset() 'weak' to let the other implementation take precedence.
  36 //
  37 __attribute__ ((__weak__, __alias__ ("__memset")))
  38 void *
  39 memset (
  40   void    *dest,
  41   int     c,
  42   size_t  n
  43   );
  44
  45 #ifdef __arm__
  46
  47 void
  48 __aeabi_memset (
  49   void    *dest,
  50   size_t  n,
  51   int     c
  52   )
  53 {
  54   __memset (dest, c, n);
  55 }
  56
  57 __attribute__ ((__alias__ ("__aeabi_memset")))
  58 void
  59 __aeabi_memset4 (
  60   void    *dest,
  61   size_t  n,
  62   int     c
  63   );
  64
  65 __attribute__ ((__alias__ ("__aeabi_memset")))
  66 void
  67 __aeabi_memset8 (
  68   void    *dest,
  69   size_t  n,
  70   int     c
  71   );
  72
  73 void
  74 __aeabi_memclr (
  75   void    *dest,
  76   size_t  n
  77   )
  78 {
  79   __memset (dest, 0, n);
  80 }
  81
  82 __attribute__ ((__alias__ ("__aeabi_memclr")))
  83 void
  84 __aeabi_memclr4 (
  85   void    *dest,
  86   size_t  n
  87   );
  88
  89 __attribute__ ((__alias__ ("__aeabi_memclr")))
  90 void
  91 __aeabi_memclr8 (
  92   void    *dest,
  93   size_t  n
  94   );
  95
  96 #endif