1 /** @file
2 Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based
3 Cryptographic Library.
4
5 Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
6 SPDX-License-Identifier: BSD-2-Clause-Patent
7
8 **/
9
10 #include <Base.h>
11 #include <Library/BaseMemoryLib.h>
12 #include <Library/BaseLib.h>
13
14 typedef UINTN size_t;
15
16 #if defined(__GNUC__) || defined(__clang__)
17 #define GLOBAL_USED __attribute__((used))
18 #else
19 #define GLOBAL_USED
20 #endif
21
22 /* OpenSSL will use floating point support, and C compiler produces the _fltused
23 symbol by default. Simply define this symbol here to satisfy the linker. */
24 int GLOBAL_USED _fltused = 1;
25
26 /* Sets buffers to a specified character */
memset(void * dest,int ch,size_t count)27 void * memset (void *dest, int ch, size_t count)
28 {
29 //
30 // NOTE: Here we use one base implementation for memset, instead of the direct
31 // optimized SetMem() wrapper. Because the IntrinsicLib has to be built
32 // without whole program optimization option, and there will be some
33 // potential register usage errors when calling other optimized codes.
34 //
35
36 //
37 // Declare the local variables that actually move the data elements as
38 // volatile to prevent the optimizer from replacing this function with
39 // the intrinsic memset()
40 //
41 volatile UINT8 *Pointer;
42
43 Pointer = (UINT8 *)dest;
44 while (count-- != 0) {
45 *(Pointer++) = (UINT8)ch;
46 }
47
48 return dest;
49 }
50
51 /* Compare bytes in two buffers. */
memcmp(const void * buf1,const void * buf2,size_t count)52 int memcmp (const void *buf1, const void *buf2, size_t count)
53 {
54 return (int)CompareMem(buf1, buf2, count);
55 }
56
strcmp(const char * s1,const char * s2)57 int strcmp (const char *s1, const char *s2)
58 {
59 return (int)AsciiStrCmp(s1, s2);
60 }
61