1 #ifndef INCLUDE_REACTOS_CAPTURE_H
2 #define INCLUDE_REACTOS_CAPTURE_H
4 #if ! defined(_NTOSKRNL_) && ! defined(_WIN32K_)
5 #error Header intended for use by NTOSKRNL/WIN32K only!
8 static const UNICODE_STRING __emptyUnicodeString
= {0, 0, NULL
};
9 static const LARGE_INTEGER __emptyLargeInteger
= {{0, 0}};
10 static const ULARGE_INTEGER __emptyULargeInteger
= {{0, 0}};
11 static const IO_STATUS_BLOCK __emptyIoStatusBlock
= {{0}, 0};
14 static const LARGE_STRING __emptyLargeString
= {0, 0, 0, NULL
};
18 * NOTE: Alignment of the pointers is not verified!
20 #define ProbeForWriteGenericType(Ptr, Type) \
22 if ((ULONG_PTR)(Ptr) + sizeof(Type) - 1 < (ULONG_PTR)(Ptr) || \
23 (ULONG_PTR)(Ptr) + sizeof(Type) - 1 >= (ULONG_PTR)MmUserProbeAddress) { \
24 ExRaiseAccessViolation(); \
26 *(volatile Type *)(Ptr) = *(volatile Type *)(Ptr); \
29 #define ProbeForWriteBoolean(Ptr) ProbeForWriteGenericType(Ptr, BOOLEAN)
30 #define ProbeForWriteUchar(Ptr) ProbeForWriteGenericType(Ptr, UCHAR)
31 #define ProbeForWriteChar(Ptr) ProbeForWriteGenericType(Ptr, CHAR)
32 #define ProbeForWriteUshort(Ptr) ProbeForWriteGenericType(Ptr, USHORT)
33 #define ProbeForWriteShort(Ptr) ProbeForWriteGenericType(Ptr, SHORT)
34 #define ProbeForWriteUlong(Ptr) ProbeForWriteGenericType(Ptr, ULONG)
35 #define ProbeForWriteLong(Ptr) ProbeForWriteGenericType(Ptr, LONG)
36 #define ProbeForWriteUint(Ptr) ProbeForWriteGenericType(Ptr, UINT)
37 #define ProbeForWriteInt(Ptr) ProbeForWriteGenericType(Ptr, INT)
38 #define ProbeForWriteUlonglong(Ptr) ProbeForWriteGenericType(Ptr, ULONGLONG)
39 #define ProbeForWriteLonglong(Ptr) ProbeForWriteGenericType(Ptr, LONGLONG)
40 #define ProbeForWritePointer(Ptr) ProbeForWriteGenericType(Ptr, PVOID)
41 #define ProbeForWriteHandle(Ptr) ProbeForWriteGenericType(Ptr, HANDLE)
42 #define ProbeForWriteLangid(Ptr) ProbeForWriteGenericType(Ptr, LANGID)
43 #define ProbeForWriteSize_t(Ptr) ProbeForWriteGenericType(Ptr, SIZE_T)
44 #define ProbeForWriteLargeInteger(Ptr) ProbeForWriteGenericType(&((PLARGE_INTEGER)Ptr)->QuadPart, LONGLONG)
45 #define ProbeForWriteUlargeInteger(Ptr) ProbeForWriteGenericType(&((PULARGE_INTEGER)Ptr)->QuadPart, ULONGLONG)
46 #define ProbeForWriteUnicodeString(Ptr) ProbeForWriteGenericType((PUNICODE_STRING)Ptr, UNICODE_STRING)
48 #define ProbeForWriteLargeString(Ptr) ProbeForWriteGenericType((PLARGE_STRING)Ptr, LARGE_STRING)
50 #define ProbeForWriteIoStatusBlock(Ptr) ProbeForWriteGenericType((PIO_STATUS_BLOCK)Ptr, IO_STATUS_BLOCK)
52 #define ProbeForReadGenericType(Ptr, Type, Default) \
53 (((ULONG_PTR)(Ptr) + sizeof(Type) - 1 < (ULONG_PTR)(Ptr) || \
54 (ULONG_PTR)(Ptr) + sizeof(Type) - 1 >= (ULONG_PTR)MmUserProbeAddress) ? \
55 ExRaiseAccessViolation(), Default : \
56 *(const volatile Type *)(Ptr))
58 #define ProbeForReadBoolean(Ptr) ProbeForReadGenericType(Ptr, BOOLEAN, FALSE)
59 #define ProbeForReadUchar(Ptr) ProbeForReadGenericType(Ptr, UCHAR, 0)
60 #define ProbeForReadChar(Ptr) ProbeForReadGenericType(Ptr, CHAR, 0)
61 #define ProbeForReadUshort(Ptr) ProbeForReadGenericType(Ptr, USHORT, 0)
62 #define ProbeForReadShort(Ptr) ProbeForReadGenericType(Ptr, SHORT, 0)
63 #define ProbeForReadUlong(Ptr) ProbeForReadGenericType(Ptr, ULONG, 0)
64 #define ProbeForReadLong(Ptr) ProbeForReadGenericType(Ptr, LONG, 0)
65 #define ProbeForReadUint(Ptr) ProbeForReadGenericType(Ptr, UINT, 0)
66 #define ProbeForReadInt(Ptr) ProbeForReadGenericType(Ptr, INT, 0)
67 #define ProbeForReadUlonglong(Ptr) ProbeForReadGenericType(Ptr, ULONGLONG, 0)
68 #define ProbeForReadLonglong(Ptr) ProbeForReadGenericType(Ptr, LONGLONG, 0)
69 #define ProbeForReadPointer(Ptr) ProbeForReadGenericType(Ptr, PVOID, NULL)
70 #define ProbeForReadHandle(Ptr) ProbeForReadGenericType(Ptr, HANDLE, NULL)
71 #define ProbeForReadLangid(Ptr) ProbeForReadGenericType(Ptr, LANGID, 0)
72 #define ProbeForReadSize_t(Ptr) ProbeForReadGenericType(Ptr, SIZE_T, 0)
73 #define ProbeForReadLargeInteger(Ptr) ProbeForReadGenericType((const LARGE_INTEGER *)(Ptr), LARGE_INTEGER, __emptyLargeInteger)
74 #define ProbeForReadUlargeInteger(Ptr) ProbeForReadGenericType((const ULARGE_INTEGER *)(Ptr), ULARGE_INTEGER, __emptyULargeInteger)
75 #define ProbeForReadUnicodeString(Ptr) ProbeForReadGenericType((const UNICODE_STRING *)(Ptr), UNICODE_STRING, __emptyUnicodeString)
77 #define ProbeForReadLargeString(Ptr) ProbeForReadGenericType((const LARGE_STRING *)(Ptr), LARGE_STRING, __emptyLargeString)
79 #define ProbeForReadIoStatusBlock(Ptr) ProbeForReadGenericType((const IO_STATUS_BLOCK *)(Ptr), IO_STATUS_BLOCK, __emptyIoStatusBlock)
81 #define ProbeAndZeroHandle(Ptr) \
83 if ((ULONG_PTR)(Ptr) + sizeof(HANDLE) - 1 < (ULONG_PTR)(Ptr) || \
84 (ULONG_PTR)(Ptr) + sizeof(HANDLE) - 1 >= (ULONG_PTR)MmUserProbeAddress) { \
85 ExRaiseAccessViolation(); \
87 *(volatile HANDLE *)(Ptr) = NULL; \
91 * Inlined Probing Macros
97 ProbeArrayForRead(IN
const VOID
*ArrayPtr
,
104 /* Check for integer overflow */
105 ArraySize
= ItemSize
* ItemCount
;
106 if (ArraySize
/ ItemSize
!= ItemCount
)
108 ExRaiseStatus(STATUS_INVALID_PARAMETER
);
111 /* Probe the array */
112 ProbeForRead(ArrayPtr
,
119 ProbeArrayForWrite(IN OUT PVOID ArrayPtr
,
126 /* Check for integer overflow */
127 ArraySize
= ItemSize
* ItemCount
;
128 if (ArraySize
/ ItemSize
!= ItemCount
)
130 ExRaiseStatus(STATUS_INVALID_PARAMETER
);
133 /* Probe the array */
134 ProbeForWrite(ArrayPtr
,
138 #endif /* _WIN32K_ */
142 ProbeAndCaptureUnicodeString(OUT PUNICODE_STRING Dest
,
143 IN KPROCESSOR_MODE CurrentMode
,
144 IN
const UNICODE_STRING
*UnsafeSrc
)
146 NTSTATUS Status
= STATUS_SUCCESS
;
147 WCHAR
*Buffer
= NULL
;
148 ASSERT(Dest
!= NULL
);
150 /* Probe the structure and buffer*/
151 if(CurrentMode
!= KernelMode
)
155 *Dest
= ProbeForReadUnicodeString(UnsafeSrc
);
156 if(Dest
->Buffer
!= NULL
)
158 if (Dest
->Length
!= 0)
160 ProbeForRead(Dest
->Buffer
,
164 /* Allocate space for the buffer */
165 Buffer
= ExAllocatePoolWithTag(PagedPool
,
166 Dest
->Length
+ sizeof(WCHAR
),
170 Status
= STATUS_INSUFFICIENT_RESOURCES
;
175 RtlCopyMemory(Buffer
, Dest
->Buffer
, Dest
->Length
);
176 Buffer
[Dest
->Length
/ sizeof(WCHAR
)] = UNICODE_NULL
;
178 /* Set it as the buffer */
179 Dest
->Buffer
= Buffer
;
180 Dest
->MaximumLength
= Dest
->Length
+ sizeof(WCHAR
);
184 /* sanitize structure */
185 Dest
->MaximumLength
= 0;
191 /* sanitize structure */
193 Dest
->MaximumLength
= 0;
196 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER
)
198 /* Free allocated resources and zero the destination string */
204 Dest
->MaximumLength
= 0;
207 /* Return the error code */
208 Status
= _SEH2_GetExceptionCode();
214 /* Just copy the UNICODE_STRING structure, don't allocate new memory!
215 We trust the caller to supply valid pointers and data. */
225 ReleaseCapturedUnicodeString(IN PUNICODE_STRING CapturedString
,
226 IN KPROCESSOR_MODE CurrentMode
)
228 if(CurrentMode
!= KernelMode
&& CapturedString
->Buffer
!= NULL
)
230 ExFreePool(CapturedString
->Buffer
);
234 #endif /* INCLUDE_REACTOS_CAPTURE_H */