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 !defined(__ANDROID__)
33 __asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
__wrap_memcpy(void * destination,const void * source,size_t num)34 void* __wrap_memcpy(void* destination, const void* source, size_t num) {
35 return memcpy(destination, source, num);
36 }
37 #else // !__x86_64__
38 void* __wrap_memcpy(void* destination, const void* source, size_t num) {
39 return memmove(destination, source, num);
40 }
41 #endif
42 #endif
43 }
44