// usermode_accessors.h

VOID ReadStructFromModeHelper(
  VOID            *Destination,
  const VOID      *Source,
  SIZE_T          Size,
  KPROCESSOR_MODE Mode
);
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Windows Driver Kit DDI reference (nf-usermode_accessors-readstructfrommodehelper)

Description

The ReadStructFromModeHelper function is a helper function that safely reads a structure of a specified size from memory based on the specified processor mode.

Parameters

`Destination`

[out] A pointer to the buffer that receives the data read from memory.

`Source`

[in] A pointer to the memory location from which to read the data.

`Size`

[in] The size, in bytes, of the data to read.

`Mode`

[in] The processor mode that determines how the memory access is performed.

Remarks

This function is a helper function used internally by the user-mode accessor functions. It provides mode-aware reading of structures from memory, with extra safety checks when accessing user-mode memory.

ReadStructFromModeHelper - NtDoc