win32ss/user/ntuser/misc/copy.c

   1 #include "win32k.h"
   2
   3 _IRQL_requires_max_(APC_LEVEL)
   4 NTSTATUS
   5 _MmCopyFromCaller(
   6     _Out_writes_bytes_all_(Bytes) PVOID Target,
   7     _In_reads_bytes_(Bytes) PVOID Source,
   8     _In_ UINT Bytes)
   9 {
  10     NTSTATUS Status;
  11
  12     PAGED_CODE();
  13     ASSERT(ExGetPreviousMode() == UserMode);
  14
  15     Status = STATUS_SUCCESS;
  16     _SEH2_TRY
  17     {
  18         ProbeForRead(Source, Bytes, 1);
  19         RtlCopyMemory(Target, Source, Bytes);
  20     }
  21     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
  22     {
  23         Status = _SEH2_GetExceptionCode();
  24     }
  25     _SEH2_END;
  26
  27     return Status;
  28 }
  29
  30 _IRQL_requires_max_(APC_LEVEL)
  31 NTSTATUS
  32 _MmCopyToCaller(
  33     _Out_writes_bytes_all_(Bytes) PVOID Target,
  34     _In_reads_bytes_(Bytes) PVOID Source,
  35     _In_ UINT Bytes)
  36 {
  37     NTSTATUS Status;
  38
  39     PAGED_CODE();
  40     ASSERT(ExGetPreviousMode() == UserMode);
  41
  42     Status = STATUS_SUCCESS;
  43     _SEH2_TRY
  44     {
  45         ProbeForWrite(Target, Bytes, 1);
  46         RtlCopyMemory(Target, Source, Bytes);
  47     }
  48     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
  49     {
  50         Status = _SEH2_GetExceptionCode();
  51     }
  52     _SEH2_END;
  53
  54     return Status;
  55 }