mirror of
https://github.com/ziglang/zig.git
synced 2024-12-02 18:12:34 +00:00
61 lines
1.8 KiB
C++
Vendored
61 lines
1.8 KiB
C++
Vendored
//===-- 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.
|
|
// Implement the getauxval() compat function for NetBSD.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SANITIZER_GETAUXVAL_H
|
|
#define SANITIZER_GETAUXVAL_H
|
|
|
|
#include "sanitizer_platform.h"
|
|
#include "sanitizer_glibc_version.h"
|
|
|
|
#if SANITIZER_LINUX || SANITIZER_FUCHSIA
|
|
|
|
# if (__GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21) || \
|
|
SANITIZER_FUCHSIA) && \
|
|
!SANITIZER_GO
|
|
# 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);
|
|
# endif
|
|
|
|
#elif SANITIZER_NETBSD
|
|
|
|
#define SANITIZER_USE_GETAUXVAL 1
|
|
|
|
#include <dlfcn.h>
|
|
#include <elf.h>
|
|
|
|
static inline decltype(AuxInfo::a_v) getauxval(decltype(AuxInfo::a_type) type) {
|
|
for (const AuxInfo *aux = (const AuxInfo *)_dlauxinfo();
|
|
aux->a_type != AT_NULL; ++aux) {
|
|
if (type == aux->a_type)
|
|
return aux->a_v;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif // SANITIZER_GETAUXVAL_H
|