| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <dlfcn.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #if __has_include(<sys/auxv.h>) |
| #include <sys/auxv.h> |
| #endif |
| #include <unistd.h> |
| |
| extern int get_value_from_lib(); |
| |
| int main() { |
| bool skip_vdso_check = false; |
| #if __has_include(<sys/auxv.h>) |
| if (getauxval(AT_SYSINFO_EHDR) == 0) { |
| skip_vdso_check = true; |
| } |
| #endif |
| |
| if (!skip_vdso_check) { |
| const char* vdso_name = "linux-vdso.so.1"; |
| #if defined(__i386__) |
| vdso_name = "linux-gate.so.1"; |
| #endif |
| void* handle = dlopen(vdso_name, RTLD_NOW); |
| if (handle == nullptr) { |
| printf("%s", dlerror()); |
| return 1; |
| } |
| dlclose(handle); |
| } |
| |
| printf("%d", get_value_from_lib()); |
| return 0; |
| } |