diff options
Diffstat (limited to 'libsanitizer/interception/interception_win.cc')
| -rw-r--r-- | libsanitizer/interception/interception_win.cc | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/libsanitizer/interception/interception_win.cc b/libsanitizer/interception/interception_win.cc index fa81162097e..1957397bdad 100644 --- a/libsanitizer/interception/interception_win.cc +++ b/libsanitizer/interception/interception_win.cc @@ -146,10 +146,16 @@ static void InterceptionFailed() { } static bool DistanceIsWithin2Gig(uptr from, uptr target) { +#if SANITIZER_WINDOWS64 if (from < target) return target - from <= (uptr)0x7FFFFFFFU; else return from - target <= (uptr)0x80000000U; +#else + // In a 32-bit address space, the address calculation will wrap, so this check + // is unnecessary. + return true; +#endif } static uptr GetMmapGranularity() { @@ -215,9 +221,8 @@ static bool IsMemoryPadding(uptr address, uptr size) { return true; } -static const u8 kHintNop10Bytes[] = { - 0x66, 0x66, 0x0F, 0x1F, 0x84, - 0x00, 0x00, 0x00, 0x00, 0x00 +static const u8 kHintNop9Bytes[] = { + 0x66, 0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00 }; template<class T> @@ -232,8 +237,8 @@ static bool FunctionHasPrefix(uptr address, const T &pattern) { static bool FunctionHasPadding(uptr address, uptr size) { if (IsMemoryPadding(address - size, size)) return true; - if (size <= sizeof(kHintNop10Bytes) && - FunctionHasPrefix(address, kHintNop10Bytes)) + if (size <= sizeof(kHintNop9Bytes) && + FunctionHasPrefix(address, kHintNop9Bytes)) return true; return false; } @@ -469,7 +474,7 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) { switch (*(u8*)address) { case 0xA1: // A1 XX XX XX XX XX XX XX XX : // movabs eax, dword ptr ds:[XXXXXXXX] - return 8; + return 9; } switch (*(u16*)address) { @@ -487,6 +492,11 @@ static size_t GetInstructionSize(uptr address, size_t* rel_offset = nullptr) { case 0x5741: // push r15 case 0x9066: // Two-byte NOP return 2; + + case 0x058B: // 8B 05 XX XX XX XX : mov eax, dword ptr [XX XX XX XX] + if (rel_offset) + *rel_offset = 2; + return 6; } switch (0x00FFFFFF & *(u32*)address) { @@ -870,6 +880,8 @@ uptr InternalGetProcAddress(void *module, const char *func_name) { IMAGE_DATA_DIRECTORY *export_directory = &headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT]; + if (export_directory->Size == 0) + return 0; RVAPtr<IMAGE_EXPORT_DIRECTORY> exports(module, export_directory->VirtualAddress); RVAPtr<DWORD> functions(module, exports->AddressOfFunctions); |