Mercurial > hg > Papers > 2021 > okud-thesis
view paper/file/bootloader.c @ 18:e8a0f9380734
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author | okud |
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date | Mon, 15 Feb 2021 21:10:15 +0900 |
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#include<efi.h> #include<efilib.h> EFI_STATUS efi_main(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) { EFI_DEVICE_PATH *Path; EFI_LOADED_IMAGE *LoadedImageParent; EFI_LOADED_IMAGE *LoadedImage; EFI_HANDLE Image; CHAR16 *Options = L"root=/dev/sda2 rootfstype=btrfs rw quiet splash"; EFI_STATUS Status=EFI_SUCCESS; InitializeLib(ImageHandle, SystemTable); Print(L"Hello, EFI!\n"); Status = uefi_call_wrapper(BS->OpenProtocol, 6, ImageHandle, &LoadedImageProtocol,(void**)&LoadedImageParent, ImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL); if (EFI_ERROR(Status)) { Print(L"Could not get LoadedImageProtocol handler %r\n", Status); return Status; } Print(L"Hello,2!\n"); Path = FileDevicePath(LoadedImageParent->DeviceHandle, L"\\OS"); if (Path == NULL) { Print(L"Could not get device path."); return EFI_INVALID_PARAMETER; } Print(L"Hello,3!\n"); Status = uefi_call_wrapper(BS->LoadImage, 6, FALSE, ImageHandle, Path, NULL, 0, &Image); if (EFI_ERROR(Status)) { Print(L"Could not load %r", Status); FreePool(Path); return Status; } Print(L"Hello,4!\n"); Status = uefi_call_wrapper(BS->OpenProtocol, 6, Image, &LoadedImageProtocol, (void**)&LoadedImage, ImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL); if (EFI_ERROR(Status)) { Print(L"Could not get LoadedImageProtocol handler %r\n", Status); uefi_call_wrapper(BS->UnloadImage, 1, Image); FreePool(Path); return Status; } Print(L"Hello,5!\n"); LoadedImage->LoadOptions = Options; LoadedImage->LoadOptionsSize = (StrLen(LoadedImage->LoadOptions)+1) * sizeof(CHAR16); Print(L"Hello,6!\n"); Status = uefi_call_wrapper(BS->StartImage, 3, Image, NULL, NULL); uefi_call_wrapper(BS->UnloadImage, 1, Image); FreePool(Path); Print(L"Hello,7!\n"); return EFI_SUCCESS; }