UEFI

Loading an UEFI Image

Transferring control to the image

typedef EFI_STATUS (/* EFIAPI */ *EFI_IMAGE_ENTRY_POINT) (
  /* IN */ EFI_HANDLE        ImageHandle,
  /* IN */ EFI_SYSTEM_TABLE *SystemTable
);

Exiting

Commandline options

EFI_TABLE_HEADER

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

EFI_SYSTEM_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_BOOT_SERVICES

typedef struct {
  EFI_TABLE_HEADER     Hdr;

  //
  // Task Priority Services
  //
  EFI_RAISE_TPL        RaiseTPL;       // EFI 1.0+
  EFI_RESTORE_TPL      RestoreTPL;     // EFI 1.0+

    //
    // Memory Services
    //
    EFI_ALLOCATE_PAGES   AllocatePages;  // EFI 1.0+
    EFI_FREE_PAGES       FreePages;      // EFI 1.0+
    EFI_GET_MEMORY_MAP   GetMemoryMap;   // EFI 1.0+
    EFI_ALLOCATE_POOL    AllocatePool;   // EFI 1.0+
    EFI_FREE_POOL        FreePool;       // EFI 1.0+

    //
    // Event & Timer Services
    //
    EFI_CREATE_EVENT     CreateEvent;    // EFI 1.0+
    EFI_SET_TIMER        SetTimer;       // EFI 1.0+
    EFI_WAIT_FOR_EVENT   WaitForEvent;   // EFI 1.0+
    EFI_SIGNAL_EVENT     SignalEvent;    // EFI 1.0+
    EFI_CLOSE_EVENT      CloseEvent;     // EFI 1.0+
    EFI_CHECK_EVENT      CheckEvent;     // EFI 1.0+

    //
    // Protocol Handler Services
    //
    EFI_INSTALL_PROTOCOL_INTERFACE     InstallProtocolInterface;            // EFI 1.0+
    EFI_REINSTALL_PROTOCOL_INTERFACE   ReinstallProtocolInterface;          // EFI 1.0+
    EFI_UNINSTALL_PROTOCOL_INTERFACE   UninstallProtocolInterface;          // EFI 1.0+
    EFI_HANDLE_PROTOCOL                HandleProtocol;                      // EFI 1.0+
    VOID*                              Reserved;                            // EFI 1.0+
    EFI_REGISTER_PROTOCOL_NOTIFY       RegisterProtocolNotify;              // EFI 1.0+
    EFI_LOCATE_HANDLE                  LocateHandle;                        // EFI 1.0+
    EFI_LOCATE_DEVICE_PATH             LocateDevicePath;                    // EFI 1.0+
    EFI_INSTALL_CONFIGURATION_TABLE    InstallConfigurationTable;           // EFI 1.0+

    //
    // Image Services
    //
    EFI_IMAGE_UNLOAD               LoadImage;        // EFI 1.0+
    EFI_IMAGE_START                StartImage;       // EFI 1.0+
    EFI_EXIT                       Exit;             // EFI 1.0+
    EFI_IMAGE_UNLOAD               UnloadImage;      // EFI 1.0+
    EFI_EXIT_BOOT_SERVICES         ExitBootServices; // EFI 1.0+

    //
    // Miscellaneous Services
    //
    EFI_GET_NEXT_MONOTONIC_COUNT   GetNextMonotonicCount; // EFI 1.0+
    EFI_STALL                      Stall;                 // EFI 1.0+
    EFI_SET_WATCHDOG_TIMER         SetWatchdogTimer;      // EFI 1.0+

    //
    // DriverSupport Services
    //
    EFI_CONNECT_CONTROLLER         ConnectController;     // EFI 1.1
    EFI_DISCONNECT_CONTROLLER      DisconnectController;  // EFI 1.1+

    //
    // Open and Close Protocol Services
    //
    EFI_OPEN_PROTOCOL              OpenProtocol;           // EFI 1.1+
    EFI_CLOSE_PROTOCOL             CloseProtocol;          // EFI 1.1+
    EFI_OPEN_PROTOCOL_INFORMATION  OpenProtocolInformation;// EFI 1.1+

    //
    // Library Services
    //
    EFI_PROTOCOLS_PER_HANDLE                     ProtocolsPerHandle;                   // EFI 1.1+
    EFI_LOCATE_HANDLE_BUFFER                     LocateHandleBuffer;                   // EFI 1.1+
    EFI_LOCATE_PROTOCOL                          LocateProtocol;                       // EFI 1.1+
    EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES   InstallMultipleProtocolInterfaces;    // EFI 1.1+
    EFI_UNINSTALL_MULTIPLE_PROTOCOL_INTERFACES   UninstallMultipleProtocolInterfaces;  // EFI 1.1+*

    //
    // 32-bit CRC Services
    //
    EFI_CALCULATE_CRC32    CalculateCrc32;     // EFI 1.1+

    //
    // Miscellaneous Services
    //
    EFI_COPY_MEM           CopyMem;        // EFI 1.1+
    EFI_SET_MEM            SetMem;         // EFI 1.1+
    EFI_CREATE_EVENT_EX    CreateEventEx;  // UEFI 2.0+
} EFI_BOOT_SERVICES;

EFI_RUNTIME_SERVICES

typedef struct {
    EFI_TABLE_HEADER                 Hdr;

    //
    // Time Services
    //
    EFI_GET_TIME                     GetTime;
    EFI_SET_TIME                     SetTime;
    EFI_GET_WAKEUP_TIME              GetWakeupTime;
    EFI_SET_WAKEUP_TIME              SetWakeupTime;

    //
    // Virtual Memory Services
    //
    EFI_SET_VIRTUAL_ADDRESS_MAP      SetVirtualAddressMap;
  EFI_CONVERT_POINTER                ConvertPointer;

    //
    // Variable Services
    //
    EFI_GET_VARIABLE                 GetVariable;
    EFI_GET_NEXT_VARIABLE_NAME       GetNextVariableName;
    EFI_SET_VARIABLE                 SetVariable;


    //
    // Miscellaneous Services
    //
    EFI_GET_NEXT_HIGH_MONO_COUNT     GetNextHighMonotonicCount;
    EFI_RESET_SYSTEM                 ResetSystem;

   //
   // UEFI 2.0 Capsule Services
   //
   EFI_UPDATE_CAPSULE               UpdateCapsule;
   EFI_QUERY_CAPSULE_CAPABILITIES   QueryCapsuleCapabilities;


 //
 // Miscellaneous UEFI 2.0 Service
 //
  EFI_QUERY_VARIABLE_INFO          QueryVariableInfo;
} EFI_RUNTIME_SERVICES;

Starting a program with EFI_SYSTEM_TABLE and EFI_HANDLE on the stack