1 /*
2 *
3 * Copyright 2016 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include <grpc/support/port_platform.h>
20
21 #include <string.h>
22
23 /* Provide a wrapped memcpy for targets that need to be backwards
24 * compatible with older libc's.
25 *
26 * Enable by setting LDFLAGS=-Wl,-wrap,memcpy when linking.
27 */
28
29 extern "C" {
30 #ifdef __linux__
31 #if defined(__x86_64__) && !defined(GPR_MUSL_LIBC_COMPAT)
32 __asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
__wrap_memcpy(void * destination,const void * source,size_t num)33 void* __wrap_memcpy(void* destination, const void* source, size_t num) {
34 return memcpy(destination, source, num);
35 }
36 #else /* !__x86_64__ */
37 void* __wrap_memcpy(void* destination, const void* source, size_t num) {
38 return memmove(destination, source, num);
39 }
40 #endif
41 #endif
42 }
43