UEFI 应用程序：UEFI NTFS 驱动程序未正确加载

Question

我正在开发一个 EFI 应用程序来加载 NTFS 驱动程序 (ntfs_x64.efi)。当我使用“load ntfs_x64.efi”命令从 EFI shell 加载驱动程序时，它工作得很好。但是，当我尝试从 EFI 应用程序中以编程方式加载驱动程序时，它会加载，但类型和 #D 未分配。

DRV |版本 |类型 | CFG |诊断 | #D | #C |司机姓名 |图片名称 | 工作（外壳） 在此输入图片描述 不工作（EFI 应用程序） 在此输入图片描述

如果您能提供有关如何解决此问题的任何见解或建议，我将不胜感激。

节目

EFI_STATUS
EFIAPI
LoadNtfsDriver(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
{
    EFI_STATUS Status;
    EFI_HANDLE LoadedImageHandle;
    EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
    EFI_DEVICE_PATH_PROTOCOL *DevicePath;
    UINTN ExitDataSize = 4*1024;
    CHAR16 *ExitData = NULL;

    // Allocate memory for ExitData
    ExitData = AllocatePool(ExitDataSize);
    if (ExitData == NULL) {
        Print(L"Failed to allocate memory for ExitData.\n");
        return EFI_OUT_OF_RESOURCES;
    }
    Print(L"Memory allocated\n");

    // Get the Loaded Image Protocol for the current image to access its device handle
    Status = gBS->OpenProtocol(
        ImageHandle,
        &gEfiLoadedImageProtocolGuid,
        (VOID **)&LoadedImage,
        ImageHandle,
        NULL,
        EFI_OPEN_PROTOCOL_GET_PROTOCOL);
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to get LoadedImageProtocol: %r\n", Status);
        return Status;
    }

    // Create a device path for the NTFS driver file
    DevicePath = FileDevicePath(LoadedImage->DeviceHandle, NTFS_DRIVER_PATH);
    if (DevicePath == NULL)
    {
        Print(L"Failed to create device path for %s\n", NTFS_DRIVER_PATH);
        return EFI_NOT_FOUND;
    }

    // Load the NTFS driver (ntfs_x64.efi)
    Status = gBS->LoadImage(
        FALSE,             // Not a Boot Image
        ImageHandle,       // Parent image handle
        DevicePath,        // Path to the NTFS driver
        NULL,              // Optional source buffer
        0,                 // Size of the source buffer
        &LoadedImageHandle // Image handle for the loaded driver
    );
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to load %s: %r\n", NTFS_DRIVER_PATH, Status);
        FreePool(DevicePath);
        return Status;
    }
    Print(L"%s loaded successfully.\n", NTFS_DRIVER_PATH);
    Print(L"Status: %r\n", Status);
    
    // Start the NTFS driver
    Status = gBS->StartImage(
        LoadedImageHandle,
        &ExitDataSize, // Optional exit data size
        &ExitData  // Optional exit data
    );
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to start %s: %r\n", NTFS_DRIVER_PATH, Status);
    }
    else
    {
        Print(L"%s started successfully.\n", NTFS_DRIVER_PATH);
        Print(L"Status: %r\n", Status);
        Print(L"Exit Data: %s\n", ExitData);
    }

    // Free allocated device path memory
    FreePool(DevicePath);

    return EFI_SUCCESS;
}

Answer 1

我将驱动程序连接到磁盘 IO 协议的所有句柄，问题得到解决。

EFI_STATUS
EFIAPI
LoadNtfsDriver(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable)
{
    EFI_STATUS Status;
    EFI_HANDLE LoadedImageHandle;
    EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
    EFI_DEVICE_PATH_PROTOCOL *DevicePath;
    UINTN ExitDataSize = 4*1024;
    CHAR16 *ExitData = NULL;

    Status = gBS->OpenProtocol(
        ImageHandle,
        &gEfiLoadedImageProtocolGuid,
        (VOID **)&LoadedImage,
        ImageHandle,
        NULL,
        EFI_OPEN_PROTOCOL_GET_PROTOCOL);
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to get LoadedImageProtocol: %r\n", Status);
        return Status;
    }

    DevicePath = FileDevicePath(LoadedImage->DeviceHandle, NTFS_DRIVER_PATH);
    if (DevicePath == NULL)
    {
        Print(L"Failed to create device path for %s\n", NTFS_DRIVER_PATH);
        return EFI_NOT_FOUND;
    }

    Status = gBS->LoadImage(
        FALSE,             // Not a Boot Image
        ImageHandle,       // Parent image handle
        DevicePath,        // Path to the NTFS driver
        NULL,              // Optional source buffer
        0,                 // Size of the source buffer
        &LoadedImageHandle // Image handle for the loaded driver
    );
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to load %s: %r\n", NTFS_DRIVER_PATH, Status);
        FreePool(DevicePath);
        return Status;
    }
    Print(L"%s loaded successfully.\n", NTFS_DRIVER_PATH);
    Print(L"Status: %r\n", Status);
    
    // Start the NTFS driver
    Status = gBS->StartImage(
        LoadedImageHandle,
        &ExitDataSize, // Optional exit data size
        &ExitData  // Optional exit data
    );
    if (EFI_ERROR(Status))
    {
        Print(L"Failed to start %s: %r\n", NTFS_DRIVER_PATH, Status);
    }
    else
    {
        Print(L"%s started successfully.\n", NTFS_DRIVER_PATH);
        Print(L"Status: %r\n", Status);
        Print(L"Exit Data: %s\n", ExitData);
    }
    
    EFI_HANDLE *HandleBuffer;
    UINTN HandleCount;
    UINTN Index;

    // Locate all handles supporting the Disk I/O protocol
    Status = gBS->LocateHandleBuffer(
        ByProtocol,
        &gEfiDiskIoProtocolGuid,
        NULL,
        &HandleCount,
        &HandleBuffer);
    if (EFI_ERROR(Status)) {
        Print(L"Failed to locate Disk IO handles: %r\n", Status);
        return Status;
    }

    for (Index = 0; Index < HandleCount; Index++) {
        // Attempt to connect the controller for each handle
        Status = gBS->ConnectController(
            HandleBuffer[Index],
            NULL,
            NULL,
            TRUE);
        if (EFI_ERROR(Status)) {
            Print(L"Failed to connect controller for handle %d: %r\n", Index, Status);
        } else {
            Print(L"Controller connected for handle %d.\n", Index);
        }
    }

    if (HandleBuffer) {
        FreePool(HandleBuffer);
    }

    // Free allocated device path memory
    FreePool(DevicePath);

    return EFI_SUCCESS;
}