1 //===-- hwasan_memintrinsics.cpp --------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// \file
10 /// This file is a part of HWAddressSanitizer and contains HWASAN versions of
11 /// memset, memcpy and memmove
12 ///
13 //===----------------------------------------------------------------------===//
14
15 #include <string.h>
16 #include "hwasan.h"
17 #include "hwasan_checks.h"
18 #include "hwasan_flags.h"
19 #include "hwasan_interface_internal.h"
20 #include "sanitizer_common/sanitizer_libc.h"
21
22 using namespace __hwasan;
23
__hwasan_memset(void * block,int c,uptr size)24 void *__hwasan_memset(void *block, int c, uptr size) {
25 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
26 reinterpret_cast<uptr>(block), size);
27 return memset(block, c, size);
28 }
29
__hwasan_memcpy(void * to,const void * from,uptr size)30 void *__hwasan_memcpy(void *to, const void *from, uptr size) {
31 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
32 reinterpret_cast<uptr>(to), size);
33 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
34 reinterpret_cast<uptr>(from), size);
35 return memcpy(to, from, size);
36 }
37
__hwasan_memmove(void * to,const void * from,uptr size)38 void *__hwasan_memmove(void *to, const void *from, uptr size) {
39 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
40 reinterpret_cast<uptr>(to), size);
41 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
42 reinterpret_cast<uptr>(from), size);
43 return memmove(to, from, size);
44 }
45
__hwasan_memset_match_all(void * block,int c,uptr size,u8 match_all_tag)46 void *__hwasan_memset_match_all(void *block, int c, uptr size,
47 u8 match_all_tag) {
48 if (GetTagFromPointer(reinterpret_cast<uptr>(block)) != match_all_tag)
49 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
50 reinterpret_cast<uptr>(block), size);
51 return memset(block, c, size);
52 }
53
__hwasan_memcpy_match_all(void * to,const void * from,uptr size,u8 match_all_tag)54 void *__hwasan_memcpy_match_all(void *to, const void *from, uptr size,
55 u8 match_all_tag) {
56 if (GetTagFromPointer(reinterpret_cast<uptr>(to)) != match_all_tag)
57 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
58 reinterpret_cast<uptr>(to), size);
59 if (GetTagFromPointer(reinterpret_cast<uptr>(from)) != match_all_tag)
60 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
61 reinterpret_cast<uptr>(from), size);
62 return memcpy(to, from, size);
63 }
64
__hwasan_memmove_match_all(void * to,const void * from,uptr size,u8 match_all_tag)65 void *__hwasan_memmove_match_all(void *to, const void *from, uptr size,
66 u8 match_all_tag) {
67 if (GetTagFromPointer(reinterpret_cast<uptr>(to)) != match_all_tag)
68 CheckAddressSized<ErrorAction::Recover, AccessType::Store>(
69 reinterpret_cast<uptr>(to), size);
70 if (GetTagFromPointer(reinterpret_cast<uptr>(from)) != match_all_tag)
71 CheckAddressSized<ErrorAction::Recover, AccessType::Load>(
72 reinterpret_cast<uptr>(from), size);
73 return memmove(to, from, size);
74 }
75