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 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 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 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 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 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 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