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//===-- hwasan_memintrinsics.cpp --------------------------------*- 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file is a part of HWAddressSanitizer and contains HWASAN versions of
/// memset, memcpy and memmove
///
//===----------------------------------------------------------------------===//
#include <string.h>
#include "hwasan.h"
#include "hwasan_checks.h"
#include "hwasan_flags.h"
#include "hwasan_interface_internal.h"
#include "sanitizer_common/sanitizer_libc.h"
using namespace __hwasan;
void *__hwasan_memset(void *block, int c, uptr size) {
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(block), size);
return memset(block, c, size);
}
void *__hwasan_memcpy(void *to, const void *from, uptr size) {
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(to), size);
CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
reinterpret_cast<uptr>(from), size);
return memcpy(to, from, size);
}
void *__hwasan_memmove(void *to, const void *from, uptr size) {
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(to), size);
CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
reinterpret_cast<uptr>(from), size);
return memmove(to, from, size);
}
void *__hwasan_memset_match_all(void *block, int c, uptr size,
u8 match_all_tag) {
if (GetTagFromPointer(reinterpret_cast<uptr>(block)) != match_all_tag)
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(block), size);
return memset(block, c, size);
}
void *__hwasan_memcpy_match_all(void *to, const void *from, uptr size,
u8 match_all_tag) {
if (GetTagFromPointer(reinterpret_cast<uptr>(to)) != match_all_tag)
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(to), size);
if (GetTagFromPointer(reinterpret_cast<uptr>(from)) != match_all_tag)
CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
reinterpret_cast<uptr>(from), size);
return memcpy(to, from, size);
}
void *__hwasan_memmove_match_all(void *to, const void *from, uptr size,
u8 match_all_tag) {
if (GetTagFromPointer(reinterpret_cast<uptr>(to)) != match_all_tag)
CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
reinterpret_cast<uptr>(to), size);
if (GetTagFromPointer(reinterpret_cast<uptr>(from)) != match_all_tag)
CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
reinterpret_cast<uptr>(from), size);
return memmove(to, from, size);
}
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