| //===-- sanitizer_getauxval.h -----------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Common getauxval() guards and definitions. |
| // getauxval() is not defined until glibc version 2.16, or until API level 21 |
| // for Android. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef SANITIZER_GETAUXVAL_H |
| #define SANITIZER_GETAUXVAL_H |
| |
| #include "sanitizer_platform.h" |
| |
| #if SANITIZER_LINUX || SANITIZER_FUCHSIA |
| |
| # include <features.h> |
| |
| # ifndef __GLIBC_PREREQ |
| # define __GLIBC_PREREQ(x, y) 0 |
| # endif |
| |
| # if __GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21) || \ |
| SANITIZER_FUCHSIA |
| # define SANITIZER_USE_GETAUXVAL 1 |
| # else |
| # define SANITIZER_USE_GETAUXVAL 0 |
| # endif |
| |
| # if SANITIZER_USE_GETAUXVAL |
| # include <sys/auxv.h> |
| # else |
| // The weak getauxval definition allows to check for the function at runtime. |
| // This is useful for Android, when compiled at a lower API level yet running |
| // on a more recent platform that offers the function. |
| extern "C" SANITIZER_WEAK_ATTRIBUTE |
| unsigned long getauxval(unsigned long type); // NOLINT |
| # endif |
| |
| #endif // SANITIZER_LINUX || SANITIZER_FUCHSIA |
| |
| #endif // SANITIZER_GETAUXVAL_H |
