49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
//===-- hwasan_globals.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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of HWAddressSanitizer.
|
|
//
|
|
// Private Hwasan header.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef HWASAN_GLOBALS_H
|
|
#define HWASAN_GLOBALS_H
|
|
|
|
#include <link.h>
|
|
|
|
#include "sanitizer_common/sanitizer_common.h"
|
|
#include "sanitizer_common/sanitizer_internal_defs.h"
|
|
|
|
namespace __hwasan {
|
|
// This object should only ever be casted over the global (i.e. not constructed)
|
|
// in the ELF PT_NOTE in order for `addr()` to work correctly.
|
|
struct hwasan_global {
|
|
// The size of this global variable. Note that the size in the descriptor is
|
|
// max 1 << 24. Larger globals have multiple descriptors.
|
|
uptr size() const { return info & 0xffffff; }
|
|
// The fully-relocated address of this global.
|
|
uptr addr() const { return reinterpret_cast<uintptr_t>(this) + gv_relptr; }
|
|
// The static tag of this global.
|
|
u8 tag() const { return info >> 24; };
|
|
|
|
// The relative address between the start of the descriptor for the HWASan
|
|
// global (in the PT_NOTE), and the fully relocated address of the global.
|
|
s32 gv_relptr;
|
|
u32 info;
|
|
};
|
|
|
|
// Walk through the specific DSO (as specified by the base, phdr, and phnum),
|
|
// and return the range of the [beginning, end) of the HWASan globals descriptor
|
|
// array.
|
|
ArrayRef<const hwasan_global> HwasanGlobalsFor(ElfW(Addr) base,
|
|
const ElfW(Phdr) * phdr,
|
|
ElfW(Half) phnum);
|
|
|
|
} // namespace __hwasan
|
|
|
|
#endif // HWASAN_GLOBALS_H
|