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[win/asan] GetInstructionSize: Support some more 5 byte instructions. #123844

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merged 1 commit into from
Jan 22, 2025
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[win/asan] GetInstructionSize: Support some more 5 byte instructions. #123844

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7 changes: 7 additions & 0 deletions compiler-rt/lib/interception/interception_win.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -606,6 +606,7 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) {

case 0xb8: // b8 XX XX XX XX : mov eax, XX XX XX XX
case 0xB9: // b9 XX XX XX XX : mov ecx, XX XX XX XX
case 0xBA: // ba XX XX XX XX : mov edx, XX XX XX XX
return 5;

// Cannot overwrite control-instruction. Return 0 to indicate failure.
Expand Down Expand Up @@ -831,6 +832,7 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) {
case 0xf88349: // 49 83 f8 XX : cmp r8, XX
return 4;

case 0x441F0F: // 0F 1F 44 XX XX : nop DWORD PTR [...]
case 0x246483: // 83 64 24 XX YY : and DWORD PTR [rsp+XX], YY
return 5;

Expand Down Expand Up @@ -902,6 +904,11 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) {
return 6;
}

switch (0xFFFFFFFFFFULL & *(u64 *)(address)) {
case 0xC07E0F4866: // 66 48 0F 7E C0 : movq rax, xmm0
return 5;
}

#else

switch (*(u8*)address) {
Expand Down
3 changes: 3 additions & 0 deletions compiler-rt/lib/interception/tests/interception_win_test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -867,6 +867,7 @@ const struct InstructionSizeData {
{ 5, {0x68, 0x71, 0x72, 0x73, 0x74}, 0, "68 XX XX XX XX : push imm32"},
{ 5, {0xb8, 0x71, 0x72, 0x73, 0x74}, 0, "b8 XX XX XX XX : mov eax, XX XX XX XX"},
{ 5, {0xB9, 0x71, 0x72, 0x73, 0x74}, 0, "b9 XX XX XX XX : mov ecx, XX XX XX XX"},
{ 5, {0xBA, 0x71, 0x72, 0x73, 0x74}, 0, "ba XX XX XX XX : mov edx, XX XX XX XX"},
{ 7, {0x8D, 0xA4, 0x24, 0x73, 0x74, 0x75, 0x76}, 0, "8D A4 24 XX XX XX XX : lea esp, [esp + XX XX XX XX]"},
#if SANITIZER_WINDOWS_x64
// sorted list
Expand Down Expand Up @@ -973,6 +974,7 @@ const struct InstructionSizeData {
{ 4, {0x80, 0x7D, 0x72, 0x73}, 0, "80 7D YY XX : cmp BYTE PTR [rbp+YY], XX"},
{ 4, {0x80, 0x7E, 0x72, 0x73}, 0, "80 7E YY XX : cmp BYTE PTR [rsi+YY], XX"},
{ 4, {0x89, 0x54, 0x24, 0x73}, 0, "89 54 24 XX : mov DWORD PTR[rsp + XX], edx"},
{ 5, {0x0F, 0x1F, 0x44, 0x73, 0x74}, 0, "0F 1F 44 XX XX : nop DWORD PTR [...]"},
{ 5, {0x44, 0x89, 0x44, 0x24, 0x74}, 0, "44 89 44 24 XX : mov DWORD PTR [rsp + XX], r8d"},
{ 5, {0x44, 0x89, 0x4c, 0x24, 0x74}, 0, "44 89 4c 24 XX : mov DWORD PTR [rsp + XX], r9d"},
{ 5, {0x48, 0x89, 0x4C, 0x24, 0x74}, 0, "48 89 4C 24 XX : mov QWORD PTR [rsp + XX], rcx"},
Expand All @@ -985,6 +987,7 @@ const struct InstructionSizeData {
{ 5, {0x48, 0x8d, 0x6c, 0x24, 0x74}, 0, "48 8d 6c 24 XX : lea rbp, [rsp + XX]"},
{ 5, {0x4c, 0x89, 0x44, 0x24, 0x74}, 0, "4c 89 44 24 XX : mov QWORD PTR [rsp + XX], r8"},
{ 5, {0x4c, 0x89, 0x4c, 0x24, 0x74}, 0, "4c 89 4c 24 XX : mov QWORD PTR [rsp + XX], r9"},
{ 5, {0x66, 0x48, 0x0F, 0x7E, 0xC0}, 0, "66 48 0F 7E C0 : movq rax, xmm0"},
{ 5, {0x83, 0x44, 0x72, 0x73, 0x74}, 0, "83 44 72 XX YY : add DWORD PTR [rdx+rsi*2+XX],YY"},
{ 5, {0x83, 0x64, 0x24, 0x73, 0x74}, 0, "83 64 24 XX YY : and DWORD PTR [rsp+XX], YY"},
{ 6, {0x48, 0x83, 0x64, 0x24, 0x74, 0x75}, 0, "48 83 64 24 XX YY : and QWORD PTR [rsp + XX], YY"},
Expand Down
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