ipxe/src/interface/efi/efi_wrap.c

/*
 * Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 * You can also choose to distribute this program under the terms of
 * the Unmodified Binary Distribution Licence (as given in the file
 * COPYING.UBDL), provided that you have satisfied its requirements.
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

/**
 * @file
 *
 * EFI image wrapping
 *
 */

#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/LoadedImage.h>
#include <ipxe/efi/efi_wrap.h>

/** EFI system table wrapper */
static EFI_SYSTEM_TABLE efi_systab_wrapper;

/** EFI boot services table wrapper */
static EFI_BOOT_SERVICES efi_bs_wrapper;

/** Colour for debug messages */
#define colour &efi_systab_wrapper

/**
 * Convert EFI status code to text
 *
 * @v efirc		EFI status code
 * @ret text		EFI status code text
 */
static const char * efi_status ( EFI_STATUS efirc ) {
	static char buf[ 19 /* "0xXXXXXXXXXXXXXXXX" + NUL */ ];

	switch ( efirc ) {
	case EFI_SUCCESS :			return "0";
	case EFI_LOAD_ERROR :			return "LOAD_ERROR";
	case EFI_INVALID_PARAMETER :		return "INVALID_PARAMETER";
	case EFI_UNSUPPORTED :			return "UNSUPPORTED";
	case EFI_BAD_BUFFER_SIZE :		return "BAD_BUFFER_SIZE";
	case EFI_BUFFER_TOO_SMALL :		return "BUFFER_TOO_SMALL";
	case EFI_NOT_READY :			return "NOT_READY";
	case EFI_DEVICE_ERROR :			return "DEVICE_ERROR";
	case EFI_WRITE_PROTECTED :		return "WRITE_PROTECTED";
	case EFI_OUT_OF_RESOURCES :		return "OUT_OF_RESOURCES";
	case EFI_VOLUME_CORRUPTED :		return "VOLUME_CORRUPTED";
	case EFI_VOLUME_FULL :			return "VOLUME_FULL";
	case EFI_NO_MEDIA :			return "NO_MEDIA";
	case EFI_MEDIA_CHANGED :		return "MEDIA_CHANGED";
	case EFI_NOT_FOUND :			return "NOT_FOUND";
	case EFI_ACCESS_DENIED :		return "ACCESS_DENIED";
	case EFI_NO_RESPONSE :			return "NO_RESPONSE";
	case EFI_NO_MAPPING :			return "NO_MAPPING";
	case EFI_TIMEOUT :			return "TIMEOUT";
	case EFI_NOT_STARTED :			return "NOT_STARTED";
	case EFI_ALREADY_STARTED :		return "ALREADY_STARTED";
	case EFI_ABORTED :			return "ABORTED";
	case EFI_ICMP_ERROR :			return "ICMP_ERROR";
	case EFI_TFTP_ERROR :			return "TFTP_ERROR";
	case EFI_PROTOCOL_ERROR :		return "PROTOCOL_ERROR";
	case EFI_INCOMPATIBLE_VERSION :		return "INCOMPATIBLE_VERSION";
	case EFI_SECURITY_VIOLATION :		return "SECURITY_VIOLATION";
	case EFI_CRC_ERROR :			return "CRC_ERROR";
	case EFI_END_OF_MEDIA :			return "END_OF_MEDIA";
	case EFI_END_OF_FILE :			return "END_OF_FILE";
	case EFI_INVALID_LANGUAGE :		return "INVALID_LANGUAGE";
	case EFI_COMPROMISED_DATA :		return "COMPROMISED_DATA";
	case EFI_WARN_UNKNOWN_GLYPH :		return "WARN_UNKNOWN_GLYPH";
	case EFI_WARN_DELETE_FAILURE :		return "WARN_DELETE_FAILURE";
	case EFI_WARN_WRITE_FAILURE :		return "WARN_WRITE_FAILURE";
	case EFI_WARN_BUFFER_TOO_SMALL :	return "WARN_BUFFER_TOO_SMALL";
	case EFI_WARN_STALE_DATA :		return "WARN_STALE_DATA";
	default:
		snprintf ( buf, sizeof ( buf ), "%#lx",
			   ( unsigned long ) efirc );
		return buf;
	}
}

/**
 * Convert EFI boolean to text
 *
 * @v boolean		Boolean value
 * @ret text		Boolean value text
 */
static const char * efi_boolean ( BOOLEAN boolean ) {

	return ( boolean ? "TRUE" : "FALSE" );
}

/**
 * Wrap InstallProtocolInterface()
 *
 */
static EFI_STATUS EFIAPI
efi_install_protocol_interface_wrapper ( EFI_HANDLE *handle, EFI_GUID *protocol,
					 EFI_INTERFACE_TYPE interface_type,
					 VOID *interface ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "InstallProtocolInterface ( %s, %s, %d, %p ) ",
	       efi_handle_name ( *handle ), efi_guid_ntoa ( protocol ),
	       interface_type, interface );
	efirc = bs->InstallProtocolInterface ( handle, protocol, interface_type,
					       interface );
	DBGC ( colour, "= %s ( %s ) -> %p\n",
	       efi_status ( efirc ), efi_handle_name ( *handle ), retaddr );
	return efirc;
}

/**
 * Wrap ReinstallProtocolInterface()
 *
 */
static EFI_STATUS EFIAPI
efi_reinstall_protocol_interface_wrapper ( EFI_HANDLE handle,
					   EFI_GUID *protocol,
					   VOID *old_interface,
					   VOID *new_interface ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "ReinstallProtocolInterface ( %s, %s, %p, %p ) ",
	       efi_handle_name ( handle ), efi_guid_ntoa ( protocol ),
	       old_interface, new_interface );
	efirc = bs->ReinstallProtocolInterface ( handle, protocol,
						 old_interface, new_interface );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap UninstallProtocolInterface()
 *
 */
static EFI_STATUS EFIAPI
efi_uninstall_protocol_interface_wrapper ( EFI_HANDLE handle,
					   EFI_GUID *protocol,
					   VOID *interface ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "UninstallProtocolInterface ( %s, %s, %p ) ",
	       efi_handle_name ( handle ), efi_guid_ntoa ( protocol ),
	       interface );
	efirc = bs->UninstallProtocolInterface ( handle, protocol, interface );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap HandleProtocol()
 *
 */
static EFI_STATUS EFIAPI
efi_handle_protocol_wrapper ( EFI_HANDLE handle, EFI_GUID *protocol,
			      VOID **interface ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "HandleProtocol ( %s, %s ) ",
	       efi_handle_name ( handle ), efi_guid_ntoa ( protocol ) );
	efirc = bs->HandleProtocol ( handle, protocol, interface );
	DBGC ( colour, "= %s ( %p ) -> %p\n",
	       efi_status ( efirc ), *interface, retaddr );
	return efirc;
}

/**
 * Wrap LocateHandle()
 *
 */
static EFI_STATUS EFIAPI
efi_locate_handle_wrapper ( EFI_LOCATE_SEARCH_TYPE search_type,
			    EFI_GUID *protocol, VOID *search_key,
			    UINTN *buffer_size, EFI_HANDLE *buffer ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	unsigned int i;
	EFI_STATUS efirc;

	DBGC ( colour, "LocateHandle ( %s, %s, %p, %zd ) ",
	       efi_locate_search_type_name ( search_type ),
	       efi_guid_ntoa ( protocol ), search_key,
	       ( ( size_t ) *buffer_size ) );
	efirc = bs->LocateHandle ( search_type, protocol, search_key,
				   buffer_size, buffer );
	DBGC ( colour, "= %s ( %zd", efi_status ( efirc ),
	       ( ( size_t ) *buffer_size ) );
	if ( efirc == 0 ) {
		DBGC ( colour, ", {" );
		for ( i = 0; i < ( *buffer_size / sizeof ( buffer[0] ) ); i++ ){
			DBGC ( colour, "%s%s", ( i ? ", " : " " ),
			       efi_handle_name ( buffer[i] ) );
		}
		DBGC ( colour, " }" );
	}
	DBGC ( colour, " ) -> %p\n", retaddr );
	return efirc;
}

/**
 * Wrap LocateDevicePath()
 *
 */
static EFI_STATUS EFIAPI
efi_locate_device_path_wrapper ( EFI_GUID *protocol,
				 EFI_DEVICE_PATH_PROTOCOL **device_path,
				 EFI_HANDLE *device ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "LocateDevicePath ( %s, %s ) ",
	       efi_guid_ntoa ( protocol ), efi_devpath_text ( *device_path ) );
	efirc = bs->LocateDevicePath ( protocol, device_path, device );
	DBGC ( colour, "= %s ( %s, ",
	       efi_status ( efirc ), efi_devpath_text ( *device_path ) );
	DBGC ( colour, "%s ) -> %p\n", efi_handle_name ( *device ), retaddr );
	return efirc;
}

/**
 * Wrap LoadImage()
 *
 */
static EFI_STATUS EFIAPI
efi_load_image_wrapper ( BOOLEAN boot_policy, EFI_HANDLE parent_image_handle,
			 EFI_DEVICE_PATH_PROTOCOL *device_path,
			 VOID *source_buffer, UINTN source_size,
			 EFI_HANDLE *image_handle ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "LoadImage ( %s, %s, ", efi_boolean ( boot_policy ),
	       efi_handle_name ( parent_image_handle ) );
	DBGC ( colour, "%s, %p, %#llx ) ",
	       efi_devpath_text ( device_path ), source_buffer,
	       ( ( unsigned long long ) source_size ) );
	efirc = bs->LoadImage ( boot_policy, parent_image_handle, device_path,
				source_buffer, source_size, image_handle );
	DBGC ( colour, "= %s ( ", efi_status ( efirc ) );
	if ( efirc == 0 )
		DBGC ( colour, "%s ", efi_handle_name ( *image_handle ) );
	DBGC ( colour, ") -> %p\n", retaddr );

	/* Wrap the new image */
	if ( efirc == 0 )
		efi_wrap ( *image_handle );

	return efirc;
}

/**
 * Wrap StartImage()
 *
 */
static EFI_STATUS EFIAPI
efi_start_image_wrapper ( EFI_HANDLE image_handle, UINTN *exit_data_size,
			  CHAR16 **exit_data ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "StartImage ( %s ) ", efi_handle_name ( image_handle ) );
	efirc = bs->StartImage ( image_handle, exit_data_size, exit_data );
	DBGC ( colour, "= %s", efi_status ( efirc ) );
	if ( ( efirc != 0 ) && exit_data && *exit_data_size )
		DBGC ( colour, " ( \"%ls\" )", *exit_data );
	DBGC ( colour, " -> %p\n", retaddr );
	if ( ( efirc != 0 ) && exit_data && *exit_data_size )
		DBGC_HD ( colour, *exit_data, *exit_data_size );
	return efirc;
}

/**
 * Wrap Exit()
 *
 */
static EFI_STATUS EFIAPI
efi_exit_wrapper ( EFI_HANDLE image_handle, EFI_STATUS exit_status,
		   UINTN exit_data_size, CHAR16 *exit_data ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	if ( ( exit_status != 0 ) && exit_data && exit_data_size )
		DBGC_HD ( colour, exit_data, exit_data_size );
	DBGC ( colour, "Exit ( %s, %s",
	       efi_handle_name ( image_handle ), efi_status ( exit_status ) );
	if ( ( exit_status != 0 ) && exit_data && exit_data_size )
		DBGC ( colour, ", \"%ls\"", exit_data );
	DBGC ( colour, " ) " );
	efirc = bs->Exit ( image_handle, exit_status, exit_data_size,
			   exit_data );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap UnloadImage()
 *
 */
static EFI_STATUS EFIAPI
efi_unload_image_wrapper ( EFI_HANDLE image_handle ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "UnloadImage ( %s ) ",
	       efi_handle_name ( image_handle ) );
	efirc = bs->UnloadImage ( image_handle );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap ExitBootServices()
 *
 */
static EFI_STATUS EFIAPI
efi_exit_boot_services_wrapper ( EFI_HANDLE image_handle, UINTN map_key ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "ExitBootServices ( %s, %#llx ) ",
	       efi_handle_name ( image_handle ),
	       ( ( unsigned long long ) map_key ) );
	efirc = bs->ExitBootServices ( image_handle, map_key );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap ConnectController()
 *
 */
static EFI_STATUS EFIAPI
efi_connect_controller_wrapper ( EFI_HANDLE controller_handle,
				 EFI_HANDLE *driver_image_handle,
				 EFI_DEVICE_PATH_PROTOCOL *remaining_path,
				 BOOLEAN recursive ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_HANDLE *tmp;
	EFI_STATUS efirc;

	DBGC ( colour, "ConnectController ( %s, {",
	       efi_handle_name ( controller_handle ) );
	if ( driver_image_handle ) {
		for ( tmp = driver_image_handle ; *tmp ; tmp++ ) {
			DBGC ( colour, "%s%s",
			       ( ( tmp == driver_image_handle ) ? " " : ", " ),
			       efi_handle_name ( *tmp ) );
		}
	}
	DBGC ( colour, " }, %s, %s ) ", efi_devpath_text ( remaining_path ),
	       efi_boolean ( recursive ) );
	efirc = bs->ConnectController ( controller_handle, driver_image_handle,
					remaining_path, recursive );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap DisconnectController()
 *
 */
static EFI_STATUS EFIAPI
efi_disconnect_controller_wrapper ( EFI_HANDLE controller_handle,
				    EFI_HANDLE driver_image_handle,
				    EFI_HANDLE child_handle ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "DisconnectController ( %s",
	       efi_handle_name ( controller_handle ) );
	DBGC ( colour, ", %s", efi_handle_name ( driver_image_handle ) );
	DBGC ( colour, ", %s ) ", efi_handle_name ( child_handle ) );
	efirc = bs->DisconnectController ( controller_handle,
					   driver_image_handle,
					   child_handle );
	DBGC ( colour, "= %s -> %p\n", efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap OpenProtocol()
 *
 */
static EFI_STATUS EFIAPI
efi_open_protocol_wrapper ( EFI_HANDLE handle, EFI_GUID *protocol,
			    VOID **interface, EFI_HANDLE agent_handle,
			    EFI_HANDLE controller_handle, UINT32 attributes ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "OpenProtocol ( %s, %s, ",
	       efi_handle_name ( handle ), efi_guid_ntoa ( protocol ) );
	DBGC ( colour, "%s, ", efi_handle_name ( agent_handle ) );
	DBGC ( colour, "%s, %s ) ", efi_handle_name ( controller_handle ),
	       efi_open_attributes_name ( attributes ) );
	efirc = bs->OpenProtocol ( handle, protocol, interface, agent_handle,
				   controller_handle, attributes );
	DBGC ( colour, "= %s ( %p ) -> %p\n",
	       efi_status ( efirc ), *interface, retaddr );
	return efirc;
}

/**
 * Wrap CloseProtocol()
 *
 */
static EFI_STATUS EFIAPI
efi_close_protocol_wrapper ( EFI_HANDLE handle, EFI_GUID *protocol,
			     EFI_HANDLE agent_handle,
			     EFI_HANDLE controller_handle ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "CloseProtocol ( %s, %s, ",
	       efi_handle_name ( handle ), efi_guid_ntoa ( protocol ) );
	DBGC ( colour, "%s, ", efi_handle_name ( agent_handle ) );
	DBGC ( colour, "%s ) ", efi_handle_name ( controller_handle ) );
	efirc = bs->CloseProtocol ( handle, protocol, agent_handle,
				    controller_handle );
	DBGC ( colour, "= %s -> %p\n",
	       efi_status ( efirc ), retaddr );
	return efirc;
}

/**
 * Wrap ProtocolsPerHandle()
 *
 */
static EFI_STATUS EFIAPI
efi_protocols_per_handle_wrapper ( EFI_HANDLE handle,
				   EFI_GUID ***protocol_buffer,
				   UINTN *protocol_buffer_count ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	unsigned int i;
	EFI_STATUS efirc;

	DBGC ( colour, "ProtocolsPerHandle ( %s ) ",
	       efi_handle_name ( handle ) );
	efirc = bs->ProtocolsPerHandle ( handle, protocol_buffer,
					 protocol_buffer_count );
	DBGC ( colour, "= %s", efi_status ( efirc ) );
	if ( efirc == 0 ) {
		DBGC ( colour, " ( {" );
		for ( i = 0 ; i < *protocol_buffer_count ; i++ ) {
			DBGC ( colour, "%s%s", ( i ? ", " : " " ),
			       efi_guid_ntoa ( (*protocol_buffer)[i] ) );
		}
		DBGC ( colour, " } )" );
	}
	DBGC ( colour, " -> %p\n", retaddr );
	return efirc;
}

/**
 * Wrap LocateHandleBuffer()
 *
 */
static EFI_STATUS EFIAPI
efi_locate_handle_buffer_wrapper ( EFI_LOCATE_SEARCH_TYPE search_type,
				   EFI_GUID *protocol, VOID *search_key,
				   UINTN *no_handles, EFI_HANDLE **buffer ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	unsigned int i;
	EFI_STATUS efirc;

	DBGC ( colour, "LocateHandleBuffer ( %s, %s, %p ) ",
	       efi_locate_search_type_name ( search_type ),
	       efi_guid_ntoa ( protocol ), search_key );
	efirc = bs->LocateHandleBuffer ( search_type, protocol, search_key,
					 no_handles, buffer );
	DBGC ( colour, "= %s", efi_status ( efirc ) );
	if ( efirc == 0 ) {
		DBGC ( colour, " ( %d, {", ( ( unsigned int ) *no_handles ) );
		for ( i = 0 ; i < *no_handles ; i++ ) {
			DBGC ( colour, "%s%s", ( i ? ", " : " " ),
			       efi_handle_name ( (*buffer)[i] ) );
		}
		DBGC ( colour, " } )" );
	}
	DBGC ( colour, " -> %p\n", retaddr );
	return efirc;
}

/**
 * Wrap LocateProtocol()
 *
 */
static EFI_STATUS EFIAPI
efi_locate_protocol_wrapper ( EFI_GUID *protocol, VOID *registration,
			      VOID **interface ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	void *retaddr = __builtin_return_address ( 0 );
	EFI_STATUS efirc;

	DBGC ( colour, "LocateProtocol ( %s, %p ) ",
	       efi_guid_ntoa ( protocol ), registration );
	efirc = bs->LocateProtocol ( protocol, registration, interface );
	DBGC ( colour, "= %s ( %p ) -> %p\n",
	       efi_status ( efirc ), *interface, retaddr );
	return efirc;
}

/**
 * Wrap the calls made by a loaded image
 *
 * @v handle		Image handle
 */
 void efi_wrap ( EFI_HANDLE handle ) {
	EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
	union {
		EFI_LOADED_IMAGE_PROTOCOL *image;
		void *intf;
	} loaded;
	EFI_STATUS efirc;
	int rc;

	/* Do nothing unless debugging is enabled */
	if ( ! DBG_LOG )
		return;

	/* Populate table wrappers */
	memcpy ( &efi_systab_wrapper, efi_systab,
		 sizeof ( efi_systab_wrapper ) );
	memcpy ( &efi_bs_wrapper, bs, sizeof ( efi_bs_wrapper ) );
	efi_systab_wrapper.BootServices	= &efi_bs_wrapper;
	efi_bs_wrapper.InstallProtocolInterface
		= efi_install_protocol_interface_wrapper;
	efi_bs_wrapper.ReinstallProtocolInterface
		= efi_reinstall_protocol_interface_wrapper;
	efi_bs_wrapper.UninstallProtocolInterface
		= efi_uninstall_protocol_interface_wrapper;
	efi_bs_wrapper.HandleProtocol	= efi_handle_protocol_wrapper;
	efi_bs_wrapper.LocateHandle	= efi_locate_handle_wrapper;
	efi_bs_wrapper.LocateDevicePath	= efi_locate_device_path_wrapper;
	efi_bs_wrapper.LoadImage	= efi_load_image_wrapper;
	efi_bs_wrapper.StartImage	= efi_start_image_wrapper;
	efi_bs_wrapper.Exit		= efi_exit_wrapper;
	efi_bs_wrapper.UnloadImage	= efi_unload_image_wrapper;
	efi_bs_wrapper.ExitBootServices	= efi_exit_boot_services_wrapper;
	efi_bs_wrapper.ConnectController
		= efi_connect_controller_wrapper;
	efi_bs_wrapper.DisconnectController
		= efi_disconnect_controller_wrapper;
	efi_bs_wrapper.OpenProtocol	= efi_open_protocol_wrapper;
	efi_bs_wrapper.CloseProtocol	= efi_close_protocol_wrapper;
	efi_bs_wrapper.ProtocolsPerHandle
		= efi_protocols_per_handle_wrapper;
	efi_bs_wrapper.LocateHandleBuffer
		= efi_locate_handle_buffer_wrapper;
	efi_bs_wrapper.LocateProtocol	= efi_locate_protocol_wrapper;

	/* Open loaded image protocol */
	if ( ( efirc = bs->OpenProtocol ( handle,
					  &efi_loaded_image_protocol_guid,
					  &loaded.intf, efi_image_handle, NULL,
					  EFI_OPEN_PROTOCOL_GET_PROTOCOL ))!=0){
		rc = -EEFI ( efirc );
		DBGC ( colour, "WRAP %s could not get loaded image protocol: "
		       "%s\n", efi_handle_name ( handle ), strerror ( rc ) );
		return;
	}

	/* Provide system table wrapper to image */
	loaded.image->SystemTable = &efi_systab_wrapper;
	DBGC ( colour, "WRAP %s at base %p has protocols:\n",
	       efi_handle_name ( handle ), loaded.image->ImageBase );
	DBGC_EFI_PROTOCOLS ( colour, handle );
	DBGC ( colour, "WRAP %s parent", efi_handle_name ( handle ) );
	DBGC ( colour, " %s\n", efi_handle_name ( loaded.image->ParentHandle ));
	DBGC ( colour, "WRAP %s device", efi_handle_name ( handle ) );
	DBGC ( colour, " %s\n", efi_handle_name ( loaded.image->DeviceHandle ));
	DBGC ( colour, "WRAP %s file", efi_handle_name ( handle ) );
	DBGC ( colour, " %s\n", efi_devpath_text ( loaded.image->FilePath ) );

	/* Close loaded image protocol */
	bs->CloseProtocol ( handle, &efi_loaded_image_protocol_guid,
			    efi_image_handle, NULL );
}