Function VmReadMemN

MdeModulePkg/Universal/EbcDxe/EbcExecute.c:5335–5369

Read a natural value from memory. May or may not be aligned. @param VmPtr current VM context @param Addr the address to read from @return The natural value at address Addr. **/

**/
UINTN
VmReadMemN (
  IN VM_CONTEXT    *VmPtr,
  IN UINTN         Addr
  )
{
  UINTN   Data;
  volatile UINT32  Size;
  UINT8   *FromPtr;
  UINT8   *ToPtr;
  //
  // Convert the address if it's in the stack gap
  //
  Addr = ConvertStackAddr (VmPtr, Addr);
  //
  // Read direct if aligned
  //
  if (IS_ALIGNED (Addr, sizeof (UINTN))) {
    return * (UINTN *) Addr;
  }
  //
  // Return unaligned data
  //
  Data    = 0;
  FromPtr = (UINT8 *) Addr;
  ToPtr   = (UINT8 *) &Data;

  for (Size = 0; Size < sizeof (Data); Size++) {
    *ToPtr = *FromPtr;
    ToPtr++;
    FromPtr++;
  }

  return Data;
}

/**
  Returns the version of the EBC virtual machine.