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退出启动时服务

Overview

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/**
  Terminates all boot services.

  @param[in]  ImageHandle       Handle that identifies the exiting image.
  @param[in]  MapKey            Key to the latest memory map.

  @retval EFI_SUCCESS           Boot services have been terminated.
  @retval EFI_INVALID_PARAMETER MapKey is incorrect.

**/
typedef
EFI_STATUS
(EFIAPI *EFI_EXIT_BOOT_SERVICES)(
  IN  EFI_HANDLE                   ImageHandle,
  IN  UINTN                        MapKey
  );

所以我们首先需要获取 MapKey

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typedef
EFI_STATUS
(EFIAPI *EFI_GET_MEMORY_MAP)(
  IN OUT UINTN                       *MemoryMapSize,
  IN OUT EFI_MEMORY_DESCRIPTOR       *MemoryMap,
  OUT    UINTN                       *MapKey,
  OUT    UINTN                       *DescriptorSize,
  OUT    UINT32                      *DescriptorVersion
  );

退出启动时服务后, 所有的启动时服务将无效, 变得无法调用, 在此之后 运行时服务 可以继续使用, 从这时开始, 电脑就是属于我的了! 在这之后, 你必须记住, 一切都需要自己打造, 这是你的世界!

Start here!