ツールキットを利用せずにUEFIアプリケーションを作成したらExitBootServicesが失敗したというメモ

awrznc 2021/05/31

ExitBootServicesの返却値がEFI_INVALID_PARAMETERになる。
GetMemoryMapで何回読み込んでも同じ結果になる。

最小限のソースコードは以下。

EfiMain.c

# EfiMain.c

extern void __cdecl __chkstk() { }
extern void __cdecl ___chkstk_ms() { }

#define NULL 0x0

#define IN
#define OUT
#define OPTIONAL
#define CONST
#define EFIAPI

#define EFI_SUCCESS 0

typedef char                BOOLEAN;
typedef int                 INTN;
typedef unsigned int        UINTN;
typedef char                INT8;
typedef unsigned char       UINT8;
typedef short               INT16;
typedef unsigned short      UINT16;
typedef long                INT32;
typedef unsigned long       UINT32;
typedef long long           INT64;
typedef unsigned long long  UINT64;
typedef char                CHAR8;
typedef short               CHAR16;
typedef void                VOID;
typedef UINTN               EFI_STATUS;
typedef VOID*               EFI_HANDLE;
typedef VOID*               EFI_EVENT;
typedef UINT64              EFI_LBA;
typedef UINTN               EFI_TPL;

typedef struct _EFI_GUID {
    unsigned int Data1;
    unsigned short Data2;
    unsigned short Data3;
    unsigned char Data4[8];
} EFI_GUID;

typedef struct _MemoryMap {
    UINTN buffer_size;
    VOID* buffer;
    UINTN map_size;
    UINTN map_key;
    UINTN descriptor_size;
    UINT32 descriptor_version;
} MemoryMap;

typedef struct {
    UINT64 Signature;
    UINT32 Revision;
    UINT32 HeaderSize;
    UINT32 CRC32;
    UINT32 Reserved;
} EFI_TABLE_HEADER;

typedef struct {
    UINT16 ScanCode;
    CHAR16 UnicodeChar;
} EFI_INPUT_KEY;

typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL EFI_SIMPLE_TEXT_INPUT_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_INPUT_RESET) ( IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This, IN BOOLEAN ExtendedVerification );
typedef EFI_STATUS (EFIAPI *EFI_INPUT_READ_KEY) ( IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This, OUT EFI_INPUT_KEY *Key );

typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL {
    EFI_INPUT_RESET Reset;
    EFI_INPUT_READ_KEY ReadKeyStroke;
    EFI_EVENT WaitForKey;
} EFI_SIMPLE_TEXT_INPUT_PROTOCOL;

typedef struct _EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_TEXT_RESET) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN BOOLEAN ExtendedVerification );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_STRING) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN CHAR16 *String );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_TEST_STRING) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN CHAR16 *String );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_QUERY_MODE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN ModeNumber, OUT UINTN *Columns, OUT UINTN *Rows );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_MODE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN ModeNumber );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_ATTRIBUTE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN Attribute );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_CLEAR_SCREEN) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_CURSOR_POSITION) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN Column, IN UINTN Row );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_ENABLE_CURSOR) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN BOOLEAN Visible );

typedef struct {
    INT32 MaxMode;
    INT32 Mode;
    INT32 Attribute;
    INT32 CursorColumn;
    INT32 CursorRow;
    BOOLEAN CursorVisible;
} SIMPLE_TEXT_OUTPUT_MODE;

typedef struct _EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL {
    EFI_TEXT_RESET Reset;
    EFI_TEXT_STRING OutputString;
    EFI_TEXT_TEST_STRING TestString;
    EFI_TEXT_QUERY_MODE QueryMode;
    EFI_TEXT_SET_MODE SetMode;
    EFI_TEXT_SET_ATTRIBUTE SetAttribute;
    EFI_TEXT_CLEAR_SCREEN ClearScreen;
    EFI_TEXT_SET_CURSOR_POSITION SetCursorPosition;
    EFI_TEXT_ENABLE_CURSOR EnableCursor;
    SIMPLE_TEXT_OUTPUT_MODE *Mode;
} EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;

typedef struct {
    UINT16 Year;
    UINT8 Month;
    UINT8 Day;
    UINT8 Hour;
    UINT8 Minute;
    UINT8 Second;
    UINT8 Pad1;
    UINT32 Nanosecond;
    INT16 TimeZone;
    UINT8 Daylight;
    UINT8 Pad2;
} EFI_TIME;

typedef struct {
    UINT32 Resolution;
    UINT32 Accuracy;
    BOOLEAN SetsToZero;
} EFI_TIME_CAPABILITIES;

typedef EFI_STATUS (EFIAPI *EFI_GET_TIME) ( IN EFI_TIME *Time, IN EFI_TIME_CAPABILITIES *Capabilities );
typedef EFI_STATUS (EFIAPI *EFI_SET_TIME) ( IN EFI_TIME *Time);
typedef EFI_STATUS (EFIAPI *EFI_GET_WAKEUP_TIME) ( OUT BOOLEAN *Enabled, OUT BOOLEAN *Pending, OUT EFI_TIME *Time );
typedef EFI_STATUS (EFIAPI *EFI_SET_WAKEUP_TIME) ( IN BOOLEAN Enable, IN EFI_TIME *Time OPTIONAL );

typedef UINT64 EFI_PHYSICAL_ADDRESS;
typedef UINT64 EFI_VIRTUAL_ADDRESS;

typedef struct {
    UINT32 Type;
    EFI_PHYSICAL_ADDRESS PhysicalStart;
    EFI_VIRTUAL_ADDRESS VirtualStart;
    UINT64 NumberOfPages;
    UINT64 Attribute;
} EFI_MEMORY_DESCRIPTOR;

typedef EFI_STATUS (EFIAPI *EFI_SET_VIRTUAL_ADDRESS_MAP) ( IN UINTN MemoryMapSize, IN UINTN DescriptorSize, IN UINT32 DescriptorVersion, IN EFI_MEMORY_DESCRIPTOR *VirtualMap );
typedef EFI_STATUS (EFIAPI *EFI_CONVERT_POINTER) ( IN UINTN DebugDisposition, IN VOID **Address );
typedef EFI_STATUS (EFIAPI *EFI_GET_VARIABLE) ( IN CHAR16 *VariableName, IN EFI_GUID *VendorGuid, OUT UINT32 *Attributes OPTIONAL, IN OUT UINTN *DataSize, OUT VOID *Data OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_VARIABLE_NAME) ( IN OUT UINTN *VariableNameSize, IN OUT CHAR16 *VariableName, IN OUT EFI_GUID *VendorGuid );
typedef EFI_STATUS (EFIAPI *EFI_SET_VARIABLE) ( IN CHAR16 *VariableName, IN EFI_GUID *VendorGuid, IN UINT32 Attributes, IN UINTN DataSize, IN VOID *Data );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_HIGH_MONO_COUNT) ( OUT UINT32 *HighCount );

typedef enum {
    EfiResetCold,
    EfiResetWarm,
    EfiResetShutdown,
    EfiResetPlatformSpecific
} EFI_RESET_TYPE;

typedef VOID (EFIAPI *EFI_RESET_SYSTEM) ( IN EFI_RESET_TYPE ResetType, IN EFI_STATUS ResetStatus, IN UINTN DataSize, IN VOID *ResetData OPTIONAL );

typedef struct {
    EFI_GUID CapsuleGuid;
    UINT32 HeaderSize;
    UINT32 Flags;
    UINT32 CapsuleImageSize;
} EFI_CAPSULE_HEADER;

typedef EFI_STATUS (EFIAPI *EFI_UPDATE_CAPSULE) ( IN EFI_CAPSULE_HEADER **CapsuleHeaderArray, IN UINTN CapsuleCount, IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_QUERY_CAPSULE_CAPABILITIES) ( IN EFI_CAPSULE_HEADER **CapsuleHeaderArray, IN UINTN CapsuleCount, OUT UINT64 *MaximumCapsuleSize, OUT EFI_RESET_TYPE *ResetType );
typedef EFI_STATUS (EFIAPI *EFI_QUERY_VARIABLE_INFO) ( IN UINT32 Attributes, OUT UINT64 *MaximumVariableStorageSize, OUT UINT64 *RemainingVariableStorageSize, OUT UINT64 *MaximumVariableSize );

typedef struct {
    EFI_TABLE_HEADER Hdr;
    EFI_GET_TIME GetTime;
    EFI_SET_TIME SetTime;
    EFI_GET_WAKEUP_TIME GetWakeupTime;
    EFI_SET_WAKEUP_TIME SetWakeupTime;
    EFI_SET_VIRTUAL_ADDRESS_MAP SetVirtualAddressMap;
    EFI_CONVERT_POINTER ConvertPointer;
    EFI_GET_VARIABLE GetVariable;
    EFI_GET_NEXT_VARIABLE_NAME GetNextVariableName;
    EFI_SET_VARIABLE SetVariable;
    EFI_GET_NEXT_HIGH_MONO_COUNT GetNextHighMonotonicCount;
    EFI_RESET_SYSTEM ResetSystem;
    EFI_UPDATE_CAPSULE UpdateCapsule;
    EFI_QUERY_CAPSULE_CAPABILITIES QueryCapsuleCapabilities;
    EFI_QUERY_VARIABLE_INFO QueryVariableInfo;
} EFI_RUNTIME_SERVICES;

typedef EFI_TPL (EFIAPI *EFI_RAISE_TPL) ( IN EFI_TPL NewTpl );
typedef VOID (EFIAPI *EFI_RESTORE_TPL) ( IN EFI_TPL OldTpl );

typedef enum {
    AllocateAnyPages,
    AllocateMaxAddress,
    AllocateAddress,
    MaxAllocateType
} EFI_ALLOCATE_TYPE;

typedef enum {
    EfiReservedMemoryType,
    EfiLoaderCode,
    EfiLoaderData,
    EfiBootServicesCode,
    EfiBootServicesData,
    EfiRuntimeServicesCode,
    EfiRuntimeServicesData,
    EfiConventionalMemory,
    EfiUnusableMemory,
    EfiACPIReclaimMemory,
    EfiACPIMemoryNVS,
    EfiMemoryMappedIO,
    EfiMemoryMappedIOPortSpace,
    EfiPalCode,
    EfiPersistentMemory,
    EfiUnacceptedMemoryType,
    EfiMaxMemoryType
} EFI_MEMORY_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_ALLOCATE_PAGES) ( IN EFI_ALLOCATE_TYPE Type, IN EFI_MEMORY_TYPE MemoryType, IN UINTN Pages, IN OUT EFI_PHYSICAL_ADDRESS *Memory );
typedef EFI_STATUS (EFIAPI *EFI_FREE_PAGES) ( IN EFI_PHYSICAL_ADDRESS Memory, IN UINTN Pages );
typedef EFI_STATUS (EFIAPI *EFI_GET_MEMORY_MAP) ( IN OUT UINTN *MemoryMapSize, OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, OUT UINTN *MapKey, OUT UINTN *DescriptorSize, OUT UINT32 *DescriptorVersion );
typedef EFI_STATUS (EFIAPI *EFI_ALLOCATE_POOL) ( IN EFI_MEMORY_TYPE PoolType, IN UINTN Size, OUT VOID **Buffer );
typedef EFI_STATUS (EFIAPI *EFI_FREE_POOL) ( IN VOID *Buffer );

typedef VOID (EFIAPI *EFI_EVENT_NOTIFY) ( IN EFI_EVENT Event, IN VOID *Context );

typedef EFI_STATUS (EFIAPI *EFI_CREATE_EVENT) ( IN UINT32 Type, IN EFI_TPL NotifyTpl,  IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL IN VOID *NotifyContext, OPTIONAL OUT EFI_EVENT *Event );

typedef enum {
    TimerCancel,
    TimerPeriodic,
    TimerRelative
} EFI_TIMER_DELAY;

typedef EFI_STATUS (EFIAPI *EFI_SET_TIMER) ( IN EFI_EVENT Event, IN EFI_TIMER_DELAY Type, IN UINT64 TriggerTime );
typedef EFI_STATUS (EFIAPI *EFI_WAIT_FOR_EVENT) ( IN UINTN NumberOfEvents, IN EFI_EVENT *Event, OUT UINTN *Index );
typedef EFI_STATUS (EFIAPI *EFI_SIGNAL_EVENT) ( IN EFI_EVENT Event );
typedef EFI_STATUS (EFIAPI *EFI_CLOSE_EVENT) ( IN EFI_EVENT Event );
typedef EFI_STATUS (EFIAPI *EFI_CHECK_EVENT) ( IN EFI_EVENT Event );

typedef enum {
 EFI_NATIVE_INTERFACE
} EFI_INTERFACE_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_INSTALL_PROTOCOL_INTERFACE) ( IN OUT EFI_HANDLE *Handle, IN EFI_GUID *Protocol, IN EFI_INTERFACE_TYPE InterfaceType, IN VOID *Interface );
typedef EFI_STATUS (EFIAPI *EFI_REINSTALL_PROTOCOL_INTERFACE) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN VOID *OldInterface, IN VOID *NewInterface );
typedef EFI_STATUS (EFIAPI *EFI_UNINSTALL_PROTOCOL_INTERFACE) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN VOID *Interface );
typedef EFI_STATUS (EFIAPI *EFI_HANDLE_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT VOID **Interface );

typedef EFI_STATUS (EFIAPI *EFI_REGISTER_PROTOCOL_NOTIFY) ( IN EFI_GUID *Protocol, IN EFI_EVENT Event, OUT VOID **Registration );

typedef enum {
    AllHandles,
    ByRegisterNotify,
    ByProtocol
} EFI_LOCATE_SEARCH_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_LOCATE_HANDLE) ( IN EFI_LOCATE_SEARCH_TYPE SearchType, IN EFI_GUID *Protocol OPTIONAL, IN VOID *SearchKey OPTIONAL, IN OUT UINTN *BufferSize, OUT EFI_HANDLE *Buffer );

typedef struct {
    UINT8 Type;
    UINT8 SubType;
    UINT8 Length[2];
} EFI_DEVICE_PATH_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_LOCATE_DEVICE_PATH) ( IN EFI_GUID *Protocol, IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath, OUT EFI_HANDLE *Device );
typedef EFI_STATUS (EFIAPI *EFI_INSTALL_CONFIGURATION_TABLE) ( IN EFI_GUID *Guid, IN VOID *Table );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_LOAD) ( IN BOOLEAN BootPolicy, IN EFI_HANDLE ParentImageHandle, IN EFI_DEVICE_PATH_PROTOCOL *DevicePath, IN VOID *SourceBuffer OPTIONAL, IN UINTN SourceSize, OUT EFI_HANDLE *ImageHandle );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_START) ( IN EFI_HANDLE ImageHandle, OUT UINTN *ExitDataSize, OUT CHAR16 **ExitData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_EXIT) ( IN EFI_HANDLE ImageHandle, IN EFI_STATUS ExitStatus, IN UINTN ExitDataSize, IN CHAR16 *ExitData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_UNLOAD) ( IN EFI_HANDLE ImageHandle );
typedef EFI_STATUS (EFIAPI *EFI_EXIT_BOOT_SERVICES) ( IN EFI_HANDLE ImageHandle, IN UINTN MapKey );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_MONOTONIC_COUNT) ( OUT UINT64 *Count );
typedef EFI_STATUS (EFIAPI *EFI_STALL) ( IN UINTN Microseconds );
typedef EFI_STATUS (EFIAPI *EFI_SET_WATCHDOG_TIMER) ( IN UINTN Timeout, IN UINT64 WatchdogCode, IN UINTN DataSize, IN CHAR16 *WatchdogData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_CONNECT_CONTROLLER) ( IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE *DriverImageHandle OPTIONAL, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL, IN BOOLEAN Recursive );
typedef EFI_STATUS (EFIAPI *EFI_DISCONNECT_CONTROLLER) ( IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE DriverImageHandle OPTIONAL, IN EFI_HANDLE ChildHandle OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_OPEN_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT VOID **Interface OPTIONAL, IN EFI_HANDLE AgentHandle, IN EFI_HANDLE ControllerHandle, IN UINT32 Attributes );
typedef EFI_STATUS (EFIAPI *EFI_CLOSE_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN EFI_HANDLE AgentHandle, IN EFI_HANDLE ControllerHandle );

typedef struct {
    EFI_HANDLE AgentHandle;
    EFI_HANDLE ControllerHandle;
    UINT32 Attributes;
    UINT32 OpenCount;
} EFI_OPEN_PROTOCOL_INFORMATION_ENTRY;

typedef EFI_STATUS (EFIAPI *EFI_OPEN_PROTOCOL_INFORMATION) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT EFI_OPEN_PROTOCOL_INFORMATION_ENTRY **EntryBuffer, OUT UINTN *EntryCount );
typedef EFI_STATUS (EFIAPI *EFI_PROTOCOLS_PER_HANDLE) ( IN EFI_HANDLE Handle, OUT EFI_GUID ***ProtocolBuffer, OUT UINTN *ProtocolBufferCount );
typedef EFI_STATUS (EFIAPI *EFI_LOCATE_HANDLE_BUFFER) ( IN EFI_LOCATE_SEARCH_TYPE SearchType, IN EFI_GUID *Protocol OPTIONAL, IN VOID *SearchKey OPTIONAL, OUT UINTN *NoHandles, OUT EFI_HANDLE **Buffer );
typedef EFI_STATUS (EFIAPI *EFI_LOCATE_PROTOCOL) ( IN EFI_GUID *Protocol, IN VOID *Registration OPTIONAL, OUT VOID **Interface );
typedef EFI_STATUS (EFIAPI *EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES) ( IN OUT EFI_HANDLE *Handle, ... );
typedef EFI_STATUS (EFIAPI *EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES) ( IN EFI_HANDLE Handle, ... );
typedef VOID (EFIAPI *EFI_COPY_MEM) ( IN VOID *Destination, IN VOID *Source, IN UINTN Length );
typedef VOID (EFIAPI *EFI_SET_MEM) ( IN VOID *Buffer, IN UINTN Size, IN UINT8 Value );
typedef EFI_STATUS (EFIAPI *EFI_CREATE_EVENT_EX) ( IN UINT32 Type, IN EFI_TPL NotifyTpl,  IN EFI_EVENT_NOTIFY NotifyFunction OPTIONAL, IN CONST VOID *NotifyContext OPTIONAL, IN CONST EFI_GUID *EventGroup OPTIONAL, OUT EFI_EVENT *Event );

typedef struct {
    EFI_TABLE_HEADER Hdr;
    EFI_RAISE_TPL RaiseTPL;
    EFI_RESTORE_TPL RestoreTPL;
    EFI_ALLOCATE_PAGES AllocatePages;
    EFI_FREE_PAGES FreePages;
    EFI_GET_MEMORY_MAP GetMemoryMap;
    EFI_ALLOCATE_POOL AllocatePool;
    EFI_FREE_POOL FreePool;
    EFI_CREATE_EVENT CreateEvent;
    EFI_SET_TIMER SetTimer;
    EFI_WAIT_FOR_EVENT WaitForEvent;
    EFI_SIGNAL_EVENT SignalEvent;
    EFI_CLOSE_EVENT CloseEvent;
    EFI_CHECK_EVENT CheckEvent;
    EFI_INSTALL_PROTOCOL_INTERFACE InstallProtocolInterface;
    EFI_REINSTALL_PROTOCOL_INTERFACE ReinstallProtocolInterface;
    EFI_UNINSTALL_PROTOCOL_INTERFACE UninstallProtocolInterface;
    EFI_HANDLE_PROTOCOL HandleProtocol;
    VOID* Reserved;
    EFI_REGISTER_PROTOCOL_NOTIFY RegisterProtocolNotify;
    EFI_LOCATE_HANDLE LocateHandle;
    EFI_LOCATE_DEVICE_PATH LocateDevicePath;
    EFI_INSTALL_CONFIGURATION_TABLE InstallConfigurationTable;
    EFI_IMAGE_LOAD LoadImage;
    EFI_IMAGE_START StartImage;
    EFI_EXIT Exit;
    EFI_IMAGE_UNLOAD UnloadImage;
    EFI_EXIT_BOOT_SERVICES ExitBootServices;
    EFI_GET_NEXT_MONOTONIC_COUNT GetNextMonotonicCount;
    EFI_STALL Stall;
    EFI_SET_WATCHDOG_TIMER SetWatchdogTimer;
    EFI_CONNECT_CONTROLLER ConnectController;
    EFI_DISCONNECT_CONTROLLER DisconnectController;
    EFI_OPEN_PROTOCOL OpenProtocol;
    EFI_CLOSE_PROTOCOL CloseProtocol;
    EFI_OPEN_PROTOCOL_INFORMATION OpenProtocolInformation;
    EFI_PROTOCOLS_PER_HANDLE ProtocolsPerHandle;
    EFI_LOCATE_HANDLE_BUFFER LocateHandleBuffer;
    EFI_LOCATE_PROTOCOL LocateProtocol;
    EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES InstallMultipleProtocolInterfaces;
    EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES UninstallMultipleProtocolInterfaces;
    EFI_COPY_MEM CopyMem;
    EFI_SET_MEM SetMem;
    EFI_CREATE_EVENT_EX CreateEventEx;
} EFI_BOOT_SERVICES;

typedef struct{
    EFI_GUID VendorGuid;
    VOID *VendorTable;
} EFI_CONFIGURATION_TABLE;

typedef struct {
    EFI_TABLE_HEADER Hdr;
    CHAR16 *FirmwareVendor;
    UINT32 FirmwareRevision;
    EFI_HANDLE ConsoleInHandle;
    EFI_SIMPLE_TEXT_INPUT_PROTOCOL *ConIn;
    EFI_HANDLE ConsoleOutHandle;
    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut;
    EFI_HANDLE StandardErrorHandle;
    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *StdErr;
    EFI_RUNTIME_SERVICES *RuntimeServices;
    EFI_BOOT_SERVICES *BootServices;
    UINTN NumberOfTableEntries;
    EFI_CONFIGURATION_TABLE *ConfigurationTable;
} EFI_SYSTEM_TABLE;

void BootLoaderPrintStatus(EFI_SYSTEM_TABLE *SystemTable, EFI_STATUS status) {
    if (status != EFI_SUCCESS) {
        SystemTable->ConOut->OutputString(SystemTable->ConOut, (CHAR16 *)L"[ INFO ] ERROR!\r\n");
    } else {
        SystemTable->ConOut->OutputString(SystemTable->ConOut, (CHAR16 *)L"[ INFO ] SUCCESS!\r\n");
    }
}

EFI_STATUS efi_main(
    EFI_HANDLE ImageHandle,
    EFI_SYSTEM_TABLE *SystemTable
) {
    // GetMemoryMap
    CHAR8 memory_map_buf[4096 * 4];
    MemoryMap memoryMap = { sizeof(memory_map_buf), memory_map_buf, 0, 0, 0, 0 };
    memoryMap.map_size = memoryMap.buffer_size;
    EFI_STATUS status = SystemTable->BootServices->GetMemoryMap(
        &memoryMap.map_size,
        (EFI_MEMORY_DESCRIPTOR*)memoryMap.buffer,
        &memoryMap.map_key,
        &memoryMap.descriptor_size,
        &memoryMap.descriptor_version
    );
    // BootLoaderPrintStatus(SystemTable, status);
    // => SUCCESS!

    // Exit
    status = SystemTable->BootServices->ExitBootServices(ImageHandle, memoryMap.map_key);
    BootLoaderPrintStatus(SystemTable, status);
    // => ERROR!

    // Halt CPU.
    while (1) __asm__("hlt");

    return EFI_SUCCESS;
}

ビルドコマンドは以下。

build.sh

clang \
    -target x86_64-pc-win32-coff \
    -mno-red-zone \
    -fno-stack-protector \
    -fshort-wchar \
    -Wall \
    -fno-builtin \
    -nostdlib \
    -c ${SCRIPT_DIR}/src/EfiMain.c -Waggregate-return -o efi_main.o

lld-link-7 /subsystem:efi_application /entry:efi_main /out:./fs/EFI/BOOT/BOOTX64.EFI efi_main.o

# or

x86_64-w64-mingw32-gcc \
    -Wall              \
    -e efi_main        \
    -nostdlib          \
    -fno-builtin       \
    -Wl,--subsystem,10 \
    -o BOOTX64.EFI src/EfiMain.c

ビルド環境はDebian10。
edk2を利用するとうまく動くので、環境に問題があるというわけではなさそう。

awrznc 2021/05/31

ちなみにEFI_STATUSを返す関数の戻り値を変数に代入しないとelfフォーマットのファイルが読み込めなかったり、そのエントリポイントへの引数がうまく渡せなかったりする（何を渡しても固定値になる）現象を確認。
edk2を利用して作成したアプリケーションではうまく読み込めるため、ツールキットを利用せずに作成したUEFIアプリケーション側に問題がありそう。

awrznc 2021/05/31に更新

edk2のビルドを見てみようと思ったが、targetがx86_64-pc-linux-gnuだったり、GenFwなる独自のツールを利用していたり、llvm-arで色々なオブジェクトをくっつけていたりしていた。追うのはかなりしんどそう。

awrznc 2021/05/31

fileコマンドでファイル形式を見てみたら、ツールキットを利用した場合とそうでない場合で少し出力が違うことがわかった。

#x86_64-w64-mingw32-gcc
BOOTX64.EFI: PE32+ executable (EFI application) x86-64 (stripped to external PDB), for MS Windows

# clang
# clangのtargetオプションに指定する値を`x86_64-pc-win32-coff`から`x86_64-w64-mingw32`に変更しても同じ結果になる
BOOTX64.EFI: PE32+ executable (EFI application) x86-64, for MS Windows

# edk2
BOOTX64.EFI: MS-DOS executable PE32+ executable (EFI application) x86-64, for MS Windows

awrznc 2021/08/30

📝edkⅡのメモ

ExitBootServicesの返り値をPrintしようとするとEFI_INVALID_PARAMETERが表示される
- Printしない場合はEFI_SUCCESSになる（if文が通るようになる）
- というかExitBootServicesの後にPrintを行おうとするとフリーズする（BootServices系の機能じゃないので問題なさそうな気がするけどダメっぽい）

awrznc 2021/09/04

📝gnu-efiのメモ

aptでovmfをインストールしたらうまくビルド・起動できた。
数年前にどこかで入手したOVMF.fdを使いまわしていたのが問題だったのかもしれない。
ちなみにgnu-efiもaptでインストールできるようだ。

awrznc 2021/09/04

📝 ELF形式のファイルをロードする際のメモ

Microsoft x64 ABIとSystem V ABIは関数の呼び出し規則が異なるため、どちらか寄せるかラッパー関数を用意してあげる必要があるみたい。

参考1: https://tnishinaga.hatenablog.com/entry/2018/09/07/024731
参考2: https://www.akiradeveloper.com/post/mikanos-rust/
参考3: https://www.czu.jp/blog/20210405

awrznc 2021/09/10に更新

うまくExitBootServicesできた。。長く苦しい戦いだった(´・ω・｀)
構造体でmap_keyの実体を管理しようとするとおかしくなるみたい。ポインタならいける。

EfiMain.c

extern void __cdecl __chkstk() { }
extern void __cdecl ___chkstk_ms() { }

#define NULL 0x0

#define IN
#define OUT
#define OPTIONAL
#define CONST
#define EFIAPI

#define EFI_SUCCESS 0

typedef char                BOOLEAN;
typedef int                 INTN;
typedef unsigned int        UINTN;
typedef char                INT8;
typedef unsigned char       UINT8;
typedef short               INT16;
typedef unsigned short      UINT16;
typedef long                INT32;
typedef unsigned long       UINT32;
typedef long long           INT64;
typedef unsigned long long  UINT64;
typedef char                CHAR8;
typedef short               CHAR16;
typedef void                VOID;
typedef UINTN               EFI_STATUS;
typedef VOID*               EFI_HANDLE;
typedef VOID*               EFI_EVENT;
typedef UINT64              EFI_LBA;
typedef UINTN               EFI_TPL;

typedef struct _EFI_GUID {
    unsigned int Data1;
    unsigned short Data2;
    unsigned short Data3;
    unsigned char Data4[8];
} EFI_GUID;

typedef struct _MemoryMap {
    UINTN buffer_size;
    VOID* buffer;
    UINTN map_size;
    UINTN map_key;
    UINTN descriptor_size;
    UINT32 descriptor_version;
} MemoryMap;

typedef struct {
    UINT64 Signature;
    UINT32 Revision;
    UINT32 HeaderSize;
    UINT32 CRC32;
    UINT32 Reserved;
} EFI_TABLE_HEADER;

typedef struct {
    UINT16 ScanCode;
    CHAR16 UnicodeChar;
} EFI_INPUT_KEY;

typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL EFI_SIMPLE_TEXT_INPUT_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_INPUT_RESET) ( IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This, IN BOOLEAN ExtendedVerification );
typedef EFI_STATUS (EFIAPI *EFI_INPUT_READ_KEY) ( IN EFI_SIMPLE_TEXT_INPUT_PROTOCOL *This, OUT EFI_INPUT_KEY *Key );

typedef struct _EFI_SIMPLE_TEXT_INPUT_PROTOCOL {
    EFI_INPUT_RESET Reset;
    EFI_INPUT_READ_KEY ReadKeyStroke;
    EFI_EVENT WaitForKey;
} EFI_SIMPLE_TEXT_INPUT_PROTOCOL;

typedef struct _EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_TEXT_RESET) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN BOOLEAN ExtendedVerification );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_STRING) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN CHAR16 *String );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_TEST_STRING) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN CHAR16 *String );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_QUERY_MODE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN ModeNumber, OUT UINTN *Columns, OUT UINTN *Rows );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_MODE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN ModeNumber );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_ATTRIBUTE) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN Attribute );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_CLEAR_SCREEN) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_SET_CURSOR_POSITION) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN UINTN Column, IN UINTN Row );
typedef EFI_STATUS (EFIAPI *EFI_TEXT_ENABLE_CURSOR) ( IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This, IN BOOLEAN Visible );

typedef struct {
    INT32 MaxMode;
    INT32 Mode;
    INT32 Attribute;
    INT32 CursorColumn;
    INT32 CursorRow;
    BOOLEAN CursorVisible;
} SIMPLE_TEXT_OUTPUT_MODE;

typedef struct _EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL {
    EFI_TEXT_RESET Reset;
    EFI_TEXT_STRING OutputString;
    EFI_TEXT_TEST_STRING TestString;
    EFI_TEXT_QUERY_MODE QueryMode;
    EFI_TEXT_SET_MODE SetMode;
    EFI_TEXT_SET_ATTRIBUTE SetAttribute;
    EFI_TEXT_CLEAR_SCREEN ClearScreen;
    EFI_TEXT_SET_CURSOR_POSITION SetCursorPosition;
    EFI_TEXT_ENABLE_CURSOR EnableCursor;
    SIMPLE_TEXT_OUTPUT_MODE *Mode;
} EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL;

typedef struct {
    UINT16 Year;
    UINT8 Month;
    UINT8 Day;
    UINT8 Hour;
    UINT8 Minute;
    UINT8 Second;
    UINT8 Pad1;
    UINT32 Nanosecond;
    INT16 TimeZone;
    UINT8 Daylight;
    UINT8 Pad2;
} EFI_TIME;

typedef struct {
    UINT32 Resolution;
    UINT32 Accuracy;
    BOOLEAN SetsToZero;
} EFI_TIME_CAPABILITIES;

typedef EFI_STATUS (EFIAPI *EFI_GET_TIME) ( IN EFI_TIME *Time, IN EFI_TIME_CAPABILITIES *Capabilities );
typedef EFI_STATUS (EFIAPI *EFI_SET_TIME) ( IN EFI_TIME *Time);
typedef EFI_STATUS (EFIAPI *EFI_GET_WAKEUP_TIME) ( OUT BOOLEAN *Enabled, OUT BOOLEAN *Pending, OUT EFI_TIME *Time );
typedef EFI_STATUS (EFIAPI *EFI_SET_WAKEUP_TIME) ( IN BOOLEAN Enable, IN EFI_TIME *Time OPTIONAL );

typedef UINT64 EFI_PHYSICAL_ADDRESS;
typedef UINT64 EFI_VIRTUAL_ADDRESS;

typedef struct {
    UINT32 Type;
    EFI_PHYSICAL_ADDRESS PhysicalStart;
    EFI_VIRTUAL_ADDRESS VirtualStart;
    UINT64 NumberOfPages;
    UINT64 Attribute;
} EFI_MEMORY_DESCRIPTOR;

typedef EFI_STATUS (EFIAPI *EFI_SET_VIRTUAL_ADDRESS_MAP) ( IN UINTN MemoryMapSize, IN UINTN DescriptorSize, IN UINT32 DescriptorVersion, IN EFI_MEMORY_DESCRIPTOR *VirtualMap );
typedef EFI_STATUS (EFIAPI *EFI_CONVERT_POINTER) ( IN UINTN DebugDisposition, IN VOID **Address );
typedef EFI_STATUS (EFIAPI *EFI_GET_VARIABLE) ( IN CHAR16 *VariableName, IN EFI_GUID *VendorGuid, OUT UINT32 *Attributes OPTIONAL, IN OUT UINTN *DataSize, OUT VOID *Data OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_VARIABLE_NAME) ( IN OUT UINTN *VariableNameSize, IN OUT CHAR16 *VariableName, IN OUT EFI_GUID *VendorGuid );
typedef EFI_STATUS (EFIAPI *EFI_SET_VARIABLE) ( IN CHAR16 *VariableName, IN EFI_GUID *VendorGuid, IN UINT32 Attributes, IN UINTN DataSize, IN VOID *Data );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_HIGH_MONO_COUNT) ( OUT UINT32 *HighCount );

typedef enum {
    EfiResetCold,
    EfiResetWarm,
    EfiResetShutdown,
    EfiResetPlatformSpecific
} EFI_RESET_TYPE;

typedef VOID (EFIAPI *EFI_RESET_SYSTEM) ( IN EFI_RESET_TYPE ResetType, IN EFI_STATUS ResetStatus, IN UINTN DataSize, IN VOID *ResetData OPTIONAL );

typedef struct {
    EFI_GUID CapsuleGuid;
    UINT32 HeaderSize;
    UINT32 Flags;
    UINT32 CapsuleImageSize;
} EFI_CAPSULE_HEADER;

typedef EFI_STATUS (EFIAPI *EFI_UPDATE_CAPSULE) ( IN EFI_CAPSULE_HEADER **CapsuleHeaderArray, IN UINTN CapsuleCount, IN EFI_PHYSICAL_ADDRESS ScatterGatherList OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_QUERY_CAPSULE_CAPABILITIES) ( IN EFI_CAPSULE_HEADER **CapsuleHeaderArray, IN UINTN CapsuleCount, OUT UINT64 *MaximumCapsuleSize, OUT EFI_RESET_TYPE *ResetType );
typedef EFI_STATUS (EFIAPI *EFI_QUERY_VARIABLE_INFO) ( IN UINT32 Attributes, OUT UINT64 *MaximumVariableStorageSize, OUT UINT64 *RemainingVariableStorageSize, OUT UINT64 *MaximumVariableSize );

typedef struct {
    EFI_TABLE_HEADER Hdr;
    EFI_GET_TIME GetTime;
    EFI_SET_TIME SetTime;
    EFI_GET_WAKEUP_TIME GetWakeupTime;
    EFI_SET_WAKEUP_TIME SetWakeupTime;
    EFI_SET_VIRTUAL_ADDRESS_MAP SetVirtualAddressMap;
    EFI_CONVERT_POINTER ConvertPointer;
    EFI_GET_VARIABLE GetVariable;
    EFI_GET_NEXT_VARIABLE_NAME GetNextVariableName;
    EFI_SET_VARIABLE SetVariable;
    EFI_GET_NEXT_HIGH_MONO_COUNT GetNextHighMonotonicCount;
    EFI_RESET_SYSTEM ResetSystem;
    EFI_UPDATE_CAPSULE UpdateCapsule;
    EFI_QUERY_CAPSULE_CAPABILITIES QueryCapsuleCapabilities;
    EFI_QUERY_VARIABLE_INFO QueryVariableInfo;
} EFI_RUNTIME_SERVICES;

typedef EFI_TPL (EFIAPI *EFI_RAISE_TPL) ( IN EFI_TPL NewTpl );
typedef VOID (EFIAPI *EFI_RESTORE_TPL) ( IN EFI_TPL OldTpl );

typedef enum {
    AllocateAnyPages,
    AllocateMaxAddress,
    AllocateAddress,
    MaxAllocateType
} EFI_ALLOCATE_TYPE;

typedef enum {
    EfiReservedMemoryType,
    EfiLoaderCode,
    EfiLoaderData,
    EfiBootServicesCode,
    EfiBootServicesData,
    EfiRuntimeServicesCode,
    EfiRuntimeServicesData,
    EfiConventionalMemory,
    EfiUnusableMemory,
    EfiACPIReclaimMemory,
    EfiACPIMemoryNVS,
    EfiMemoryMappedIO,
    EfiMemoryMappedIOPortSpace,
    EfiPalCode,
    EfiPersistentMemory,
    EfiUnacceptedMemoryType,
    EfiMaxMemoryType
} EFI_MEMORY_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_ALLOCATE_PAGES) ( IN EFI_ALLOCATE_TYPE Type, IN EFI_MEMORY_TYPE MemoryType, IN UINTN Pages, IN OUT EFI_PHYSICAL_ADDRESS *Memory );
typedef EFI_STATUS (EFIAPI *EFI_FREE_PAGES) ( IN EFI_PHYSICAL_ADDRESS Memory, IN UINTN Pages );
typedef EFI_STATUS (EFIAPI *EFI_GET_MEMORY_MAP) ( IN OUT UINTN *MemoryMapSize, OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, OUT UINTN *MapKey, OUT UINTN *DescriptorSize, OUT UINT32 *DescriptorVersion );
typedef EFI_STATUS (EFIAPI *EFI_ALLOCATE_POOL) ( IN EFI_MEMORY_TYPE PoolType, IN UINTN Size, OUT VOID **Buffer );
typedef EFI_STATUS (EFIAPI *EFI_FREE_POOL) ( IN VOID *Buffer );

typedef VOID (EFIAPI *EFI_EVENT_NOTIFY) ( IN EFI_EVENT Event, IN VOID *Context );

typedef EFI_STATUS (EFIAPI *EFI_CREATE_EVENT) ( IN UINT32 Type, IN EFI_TPL NotifyTpl,  IN EFI_EVENT_NOTIFY NotifyFunction, OPTIONAL IN VOID *NotifyContext, OPTIONAL OUT EFI_EVENT *Event );

typedef enum {
    TimerCancel,
    TimerPeriodic,
    TimerRelative
} EFI_TIMER_DELAY;

typedef EFI_STATUS (EFIAPI *EFI_SET_TIMER) ( IN EFI_EVENT Event, IN EFI_TIMER_DELAY Type, IN UINT64 TriggerTime );
typedef EFI_STATUS (EFIAPI *EFI_WAIT_FOR_EVENT) ( IN UINTN NumberOfEvents, IN EFI_EVENT *Event, OUT UINTN *Index );
typedef EFI_STATUS (EFIAPI *EFI_SIGNAL_EVENT) ( IN EFI_EVENT Event );
typedef EFI_STATUS (EFIAPI *EFI_CLOSE_EVENT) ( IN EFI_EVENT Event );
typedef EFI_STATUS (EFIAPI *EFI_CHECK_EVENT) ( IN EFI_EVENT Event );

typedef enum {
 EFI_NATIVE_INTERFACE
} EFI_INTERFACE_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_INSTALL_PROTOCOL_INTERFACE) ( IN OUT EFI_HANDLE *Handle, IN EFI_GUID *Protocol, IN EFI_INTERFACE_TYPE InterfaceType, IN VOID *Interface );
typedef EFI_STATUS (EFIAPI *EFI_REINSTALL_PROTOCOL_INTERFACE) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN VOID *OldInterface, IN VOID *NewInterface );
typedef EFI_STATUS (EFIAPI *EFI_UNINSTALL_PROTOCOL_INTERFACE) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN VOID *Interface );
typedef EFI_STATUS (EFIAPI *EFI_HANDLE_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT VOID **Interface );

typedef EFI_STATUS (EFIAPI *EFI_REGISTER_PROTOCOL_NOTIFY) ( IN EFI_GUID *Protocol, IN EFI_EVENT Event, OUT VOID **Registration );

typedef enum {
    AllHandles,
    ByRegisterNotify,
    ByProtocol
} EFI_LOCATE_SEARCH_TYPE;

typedef EFI_STATUS (EFIAPI *EFI_LOCATE_HANDLE) ( IN EFI_LOCATE_SEARCH_TYPE SearchType, IN EFI_GUID *Protocol OPTIONAL, IN VOID *SearchKey OPTIONAL, IN OUT UINTN *BufferSize, OUT EFI_HANDLE *Buffer );

typedef struct {
    UINT8 Type;
    UINT8 SubType;
    UINT8 Length[2];
} EFI_DEVICE_PATH_PROTOCOL;

typedef EFI_STATUS (EFIAPI *EFI_LOCATE_DEVICE_PATH) ( IN EFI_GUID *Protocol, IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath, OUT EFI_HANDLE *Device );
typedef EFI_STATUS (EFIAPI *EFI_INSTALL_CONFIGURATION_TABLE) ( IN EFI_GUID *Guid, IN VOID *Table );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_LOAD) ( IN BOOLEAN BootPolicy, IN EFI_HANDLE ParentImageHandle, IN EFI_DEVICE_PATH_PROTOCOL *DevicePath, IN VOID *SourceBuffer OPTIONAL, IN UINTN SourceSize, OUT EFI_HANDLE *ImageHandle );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_START) ( IN EFI_HANDLE ImageHandle, OUT UINTN *ExitDataSize, OUT CHAR16 **ExitData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_EXIT) ( IN EFI_HANDLE ImageHandle, IN EFI_STATUS ExitStatus, IN UINTN ExitDataSize, IN CHAR16 *ExitData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_IMAGE_UNLOAD) ( IN EFI_HANDLE ImageHandle );
typedef EFI_STATUS (EFIAPI *EFI_EXIT_BOOT_SERVICES) ( IN EFI_HANDLE ImageHandle, IN UINTN MapKey );
typedef EFI_STATUS (EFIAPI *EFI_GET_NEXT_MONOTONIC_COUNT) ( OUT UINT64 *Count );
typedef EFI_STATUS (EFIAPI *EFI_STALL) ( IN UINTN Microseconds );
typedef EFI_STATUS (EFIAPI *EFI_SET_WATCHDOG_TIMER) ( IN UINTN Timeout, IN UINT64 WatchdogCode, IN UINTN DataSize, IN CHAR16 *WatchdogData OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_CONNECT_CONTROLLER) ( IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE *DriverImageHandle OPTIONAL, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL, IN BOOLEAN Recursive );
typedef EFI_STATUS (EFIAPI *EFI_DISCONNECT_CONTROLLER) ( IN EFI_HANDLE ControllerHandle, IN EFI_HANDLE DriverImageHandle OPTIONAL, IN EFI_HANDLE ChildHandle OPTIONAL );
typedef EFI_STATUS (EFIAPI *EFI_OPEN_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT VOID **Interface OPTIONAL, IN EFI_HANDLE AgentHandle, IN EFI_HANDLE ControllerHandle, IN UINT32 Attributes );
typedef EFI_STATUS (EFIAPI *EFI_CLOSE_PROTOCOL) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, IN EFI_HANDLE AgentHandle, IN EFI_HANDLE ControllerHandle );

typedef struct {
    EFI_HANDLE AgentHandle;
    EFI_HANDLE ControllerHandle;
    UINT32 Attributes;
    UINT32 OpenCount;
} EFI_OPEN_PROTOCOL_INFORMATION_ENTRY;

typedef EFI_STATUS (EFIAPI *EFI_OPEN_PROTOCOL_INFORMATION) ( IN EFI_HANDLE Handle, IN EFI_GUID *Protocol, OUT EFI_OPEN_PROTOCOL_INFORMATION_ENTRY **EntryBuffer, OUT UINTN *EntryCount );
typedef EFI_STATUS (EFIAPI *EFI_PROTOCOLS_PER_HANDLE) ( IN EFI_HANDLE Handle, OUT EFI_GUID ***ProtocolBuffer, OUT UINTN *ProtocolBufferCount );
typedef EFI_STATUS (EFIAPI *EFI_LOCATE_HANDLE_BUFFER) ( IN EFI_LOCATE_SEARCH_TYPE SearchType, IN EFI_GUID *Protocol OPTIONAL, IN VOID *SearchKey OPTIONAL, OUT UINTN *NoHandles, OUT EFI_HANDLE **Buffer );
typedef EFI_STATUS (EFIAPI *EFI_LOCATE_PROTOCOL) ( IN EFI_GUID *Protocol, IN VOID *Registration OPTIONAL, OUT VOID **Interface );
typedef EFI_STATUS (EFIAPI *EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES) ( IN OUT EFI_HANDLE *Handle, ... );
typedef EFI_STATUS (EFIAPI *EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES) ( IN EFI_HANDLE Handle, ... );
typedef VOID (EFIAPI *EFI_COPY_MEM) ( IN VOID *Destination, IN VOID *Source, IN UINTN Length );
typedef VOID (EFIAPI *EFI_SET_MEM) ( IN VOID *Buffer, IN UINTN Size, IN UINT8 Value );
typedef EFI_STATUS (EFIAPI *EFI_CREATE_EVENT_EX) ( IN UINT32 Type, IN EFI_TPL NotifyTpl,  IN EFI_EVENT_NOTIFY NotifyFunction OPTIONAL, IN CONST VOID *NotifyContext OPTIONAL, IN CONST EFI_GUID *EventGroup OPTIONAL, OUT EFI_EVENT *Event );

typedef struct {
    EFI_TABLE_HEADER Hdr;
    EFI_RAISE_TPL RaiseTPL;
    EFI_RESTORE_TPL RestoreTPL;
    EFI_ALLOCATE_PAGES AllocatePages;
    EFI_FREE_PAGES FreePages;
    EFI_GET_MEMORY_MAP GetMemoryMap;
    EFI_ALLOCATE_POOL AllocatePool;
    EFI_FREE_POOL FreePool;
    EFI_CREATE_EVENT CreateEvent;
    EFI_SET_TIMER SetTimer;
    EFI_WAIT_FOR_EVENT WaitForEvent;
    EFI_SIGNAL_EVENT SignalEvent;
    EFI_CLOSE_EVENT CloseEvent;
    EFI_CHECK_EVENT CheckEvent;
    EFI_INSTALL_PROTOCOL_INTERFACE InstallProtocolInterface;
    EFI_REINSTALL_PROTOCOL_INTERFACE ReinstallProtocolInterface;
    EFI_UNINSTALL_PROTOCOL_INTERFACE UninstallProtocolInterface;
    EFI_HANDLE_PROTOCOL HandleProtocol;
    VOID* Reserved;
    EFI_REGISTER_PROTOCOL_NOTIFY RegisterProtocolNotify;
    EFI_LOCATE_HANDLE LocateHandle;
    EFI_LOCATE_DEVICE_PATH LocateDevicePath;
    EFI_INSTALL_CONFIGURATION_TABLE InstallConfigurationTable;
    EFI_IMAGE_LOAD LoadImage;
    EFI_IMAGE_START StartImage;
    EFI_EXIT Exit;
    EFI_IMAGE_UNLOAD UnloadImage;
    EFI_EXIT_BOOT_SERVICES ExitBootServices;
    EFI_GET_NEXT_MONOTONIC_COUNT GetNextMonotonicCount;
    EFI_STALL Stall;
    EFI_SET_WATCHDOG_TIMER SetWatchdogTimer;
    EFI_CONNECT_CONTROLLER ConnectController;
    EFI_DISCONNECT_CONTROLLER DisconnectController;
    EFI_OPEN_PROTOCOL OpenProtocol;
    EFI_CLOSE_PROTOCOL CloseProtocol;
    EFI_OPEN_PROTOCOL_INFORMATION OpenProtocolInformation;
    EFI_PROTOCOLS_PER_HANDLE ProtocolsPerHandle;
    EFI_LOCATE_HANDLE_BUFFER LocateHandleBuffer;
    EFI_LOCATE_PROTOCOL LocateProtocol;
    EFI_INSTALL_MULTIPLE_PROTOCOL_INTERFACES InstallMultipleProtocolInterfaces;
    EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES UninstallMultipleProtocolInterfaces;
    EFI_COPY_MEM CopyMem;
    EFI_SET_MEM SetMem;
    EFI_CREATE_EVENT_EX CreateEventEx;
} EFI_BOOT_SERVICES;

typedef struct{
    EFI_GUID VendorGuid;
    VOID *VendorTable;
} EFI_CONFIGURATION_TABLE;

typedef struct {
    EFI_TABLE_HEADER Hdr;
    CHAR16 *FirmwareVendor;
    UINT32 FirmwareRevision;
    EFI_HANDLE ConsoleInHandle;
    EFI_SIMPLE_TEXT_INPUT_PROTOCOL *ConIn;
    EFI_HANDLE ConsoleOutHandle;
    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *ConOut;
    EFI_HANDLE StandardErrorHandle;
    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *StdErr;
    EFI_RUNTIME_SERVICES *RuntimeServices;
    EFI_BOOT_SERVICES *BootServices;
    UINTN NumberOfTableEntries;
    EFI_CONFIGURATION_TABLE *ConfigurationTable;
} EFI_SYSTEM_TABLE;

EFI_STATUS efi_main(
    EFI_HANDLE ImageHandle,
    EFI_SYSTEM_TABLE *SystemTable
) {
    CHAR8 memmap_buf[4096 * 4];
    UINTN buffer_size = sizeof(memmap_buf);
    VOID* buffer = memmap_buf;
    UINTN map_size = 0;
    UINTN map_key = 0;
    UINTN descriptor_size = 0;
    UINT32 descriptor_version = 0;
    EFI_STATUS status;

    map_size = buffer_size;
    SystemTable->BootServices->GetMemoryMap(
        &map_size,
        (EFI_MEMORY_DESCRIPTOR*)buffer,
        &map_key,
        &descriptor_size,
        &descriptor_version);

    status = SystemTable->BootServices->ExitBootServices(ImageHandle, map_key);
    if (EFI_SUCCESS != status) {
        map_size = buffer_size;
        status = SystemTable->BootServices->GetMemoryMap(
            &map_size,
            (EFI_MEMORY_DESCRIPTOR*)buffer,
            &map_key,
            &descriptor_size,
            &descriptor_version);
        if (EFI_SUCCESS != status) {
            while (1);
        }
        status = SystemTable->BootServices->ExitBootServices(ImageHandle, map_key);
        if (EFI_SUCCESS != status) {
            while (1);
        }
    }
    SystemTable->RuntimeServices->ResetSystem(EfiResetShutdown, EFI_SUCCESS, 0, NULL);

    return EFI_SUCCESS;
}

awrznc 2022/01/18

よく見たらデータ型が違ってたわ。。（32bit系の型が軒並みおかしい）

このスクラップは2021/09/11にクローズされました