Question

我正在编写一个UEFI'chainloader'来了解它的工作原理。我正在使用gnu-efi，并尝试加载和启动EFI图像。我希望我的main.efi加载并运行位于同一ESP中的hello.efi。我只是不明白该怎么称呼以及如何调用它。这是我的代码：

    #include <efi.h>        // EFI header
    #include <efilib.h>     // EFI library header

    int DisableTimeout(EFI_SYSTEM_TABLE *SystemTable);  // Allows us to call in efi_main

    EFI_STATUS EFIAPI efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {

        InitializeLib(ImageHandle, SystemTable);
        EFI_STATUS Status;

        EFI_HANDLE ImageHandle2 = NULL;

        const CHAR16 *FileName = L"HELLO.efi";
        EFI_DEVICE_PATH_PROTOCOL *FilePath;

        uefi_call_wrapper(SystemTable->ConOut->SetAttribute, 1, SystemTable->ConOut, 0x0F); // Set text to white
        uefi_call_wrapper(SystemTable->ConOut->ClearScreen, 1, SystemTable->ConOut);    // Clear screen

        Print(L"Begin boot process.\nBooting from system with ");
        Print(SystemTable->FirmwareVendor);
        Print(L" firmware.\n");

        Status = DisableTimeout(SystemTable);   // Pass system table so it can shut off timer


Status = SystemTable->BootServices->LoadImage(TRUE, ImageHandle, FilePath, NULL, 0, &ImageHandle2);
    Status = SystemTable->BootServices->StartImage(ImageHandle2, NULL, NULL);


    Print(L"Boot complete.\n");
    WaitForSingleEvent(SystemTable->ConIn->WaitForKey, 0);  // Wait for keypress

        return EFI_SUCCESS;
    }

DisableTimeout（）是我做的一个函数。

对不起，我对UEFI开发很新。

使用gnu-efi加载EFI图像

0 个答案: