/** @file
Produce Load File Protocol for UEFI Applications in Firmware Volumes
Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiDxe.h>
#include <Guid/LzmaDecompress.h>
#include <Protocol/LoadFile.h>
#include <Protocol/DevicePath.h>
#include <Protocol/FirmwareVolume2.h>
#include <Protocol/FirmwareVolumeBlock.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DevicePathLib.h>
#define LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('l', 'f', 'f', 'v')
typedef struct {
UINTN Signature;
EFI_LOAD_FILE_PROTOCOL LoadFile;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;
EFI_GUID NameGuid;
LIST_ENTRY Link;
} LOAD_FILE_ON_FV2_PRIVATE_DATA;
#define LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_THIS(a) CR (a, LOAD_FILE_ON_FV2_PRIVATE_DATA, LoadFile, LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE)
#define LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_LINK(a) CR (a, LOAD_FILE_ON_FV2_PRIVATE_DATA, Link, LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE)
EFI_EVENT mFvRegistration;
LIST_ENTRY mPrivateDataList;
/**
Causes the driver to load a specified file from firmware volume.
@param[in] This Protocol instance pointer.
@param[in] FilePath The device specific path of the file to load.
@param[in] BootPolicy If TRUE, indicates that the request originates from the
boot manager is attempting to load FilePath as a boot
selection. If FALSE, then FilePath must match an exact file
to be loaded.
@param[in, out] BufferSize On input the size of Buffer in bytes. On output with a return
code of EFI_SUCCESS, the amount of data transferred to
Buffer. On output with a return code of EFI_BUFFER_TOO_SMALL,
the size of Buffer required to retrieve the requested file.
@param[in] Buffer The memory buffer to transfer the file to. IF Buffer is NULL,
then no the size of the requested file is returned in
BufferSize.
@retval EFI_SUCCESS The file was loaded.
@retval EFI_UNSUPPORTED The device does not support the provided BootPolicy.
@retval EFI_INVALID_PARAMETER FilePath is not a valid device path, or
BufferSize is NULL.
@retval EFI_DEVICE_ERROR The file was not loaded due to a device error.
@retval EFI_NOT_FOUND The file was not found.
@retval EFI_OUT_OF_RESOURCES An allocation failure occurred.
@retval EFI_ACCESS_DENIED The firmware volume is configured to
disallow reads.
**/
EFI_STATUS
EFIAPI
LoadFileOnFv2LoadFile (
IN EFI_LOAD_FILE_PROTOCOL *This,
IN EFI_DEVICE_PATH_PROTOCOL *FilePath,
IN BOOLEAN BootPolicy,
IN OUT UINTN *BufferSize,
IN VOID *Buffer OPTIONAL
)
{
EFI_STATUS Status;
LOAD_FILE_ON_FV2_PRIVATE_DATA *Private;
VOID *Pe32Buffer;
UINTN Pe32BufferSize;
UINT32 AuthenticationStatus;
if (This == NULL || BufferSize == NULL) {
return EFI_INVALID_PARAMETER;
}
//
// Only support BootPolicy
//
if (!BootPolicy) {
return EFI_UNSUPPORTED;
}
//
// Get private context data
//
Private = LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_THIS (This);
//
// Determine the size of the PE32 section
//
Pe32Buffer = NULL;
Pe32BufferSize = 0;
Status = Private->Fv->ReadSection (
Private->Fv,
&Private->NameGuid,
EFI_SECTION_PE32,
0,
&Pe32Buffer,
&Pe32BufferSize,
&AuthenticationStatus
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// If the buffer passed in is not large enough, return the size of the required
// buffer in BufferSize and return EFI_BUFFER_TOO_SMALL
//
if (*BufferSize < Pe32BufferSize || Buffer == NULL) {
*BufferSize = Pe32BufferSize;
return EFI_BUFFER_TOO_SMALL;
}
//
// The buffer passed in is large enough, so read the PE32 section directly into
// the buffer, update BufferSize with the actual size read, and return the status
// from ReadSection()
//
return Private->Fv->ReadSection (
Private->Fv,
&Private->NameGuid,
EFI_SECTION_PE32,
0,
&Buffer,
BufferSize,
&AuthenticationStatus
);
}
LOAD_FILE_ON_FV2_PRIVATE_DATA mLoadFileOnFv2PrivateDataTemplate = {
LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE,
{
LoadFileOnFv2LoadFile
}
};
/**
Check if the FFS has been installed LoadFileProtocol for it.
@param[in] NameGuid Point to FFS File GUID to be checked.
@retval TRUE The FFS's FileLoadProtocol is in list.
@retval FALSE The FFS's FileLoadProtocol is not in list.
**/
BOOLEAN
EFIAPI
IsInPrivateList (
IN EFI_GUID *NameGuid
)
{
LIST_ENTRY *Entry;
LOAD_FILE_ON_FV2_PRIVATE_DATA *PrivateData;
if (IsListEmpty (&mPrivateDataList)) {
return FALSE;
}
for(Entry = (&mPrivateDataList)->ForwardLink; Entry != (&mPrivateDataList); Entry = Entry->ForwardLink) {
PrivateData = LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_LINK (Entry);
if (CompareGuid (NameGuid, &PrivateData->NameGuid)) {
DEBUG ((DEBUG_INFO, "LoadFileOnFv2:FileLoadProtocol has been installed in:%g\n", NameGuid));
return TRUE;
}
}
return FALSE;
}
/**
Create file device path based on FFS file GUID and UI name.
@param Device Handle to Firmware Volume.
@param NameGuid Point to FFS file GUID.
@param FileName Point to FFS UI section name.
@return the combined device path
**/
EFI_DEVICE_PATH_PROTOCOL *
EFIAPI
CreateFileDevicePath (
IN EFI_HANDLE Device,
IN EFI_GUID *NameGuid,
IN CONST CHAR16 *FileName
)
{
UINTN Size;
FILEPATH_DEVICE_PATH *FilePath;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *FileDevicePath;
MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FileNode;
EfiInitializeFwVolDevicepathNode (&FileNode, NameGuid);
DevicePath = AppendDevicePathNode (
DevicePathFromHandle (Device),
(EFI_DEVICE_PATH_PROTOCOL *) &FileNode
);
Size = StrSize (FileName);
FileDevicePath = AllocatePool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + END_DEVICE_PATH_LENGTH);
if (FileDevicePath != NULL) {
FilePath = (FILEPATH_DEVICE_PATH *) FileDevicePath;
FilePath->Header.Type = MEDIA_DEVICE_PATH;
FilePath->Header.SubType = MEDIA_FILEPATH_DP;
CopyMem (&FilePath->PathName, FileName, Size);
SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH);
SetDevicePathEndNode (NextDevicePathNode (&FilePath->Header));
DevicePath = AppendDevicePath (DevicePath, FileDevicePath);
FreePool (FileDevicePath);
}
return DevicePath;
}
/**
Install LoadFile Protocol for Application FFS.
@param Handle FV Handle.
**/
VOID
EFIAPI
InstallFileLoadProtocol (
EFI_HANDLE Handle
)
{
EFI_STATUS Status;
LOAD_FILE_ON_FV2_PRIVATE_DATA *Private;
EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;
EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
EFI_PHYSICAL_ADDRESS Address;
EFI_FV_FILETYPE FileType;
UINTN Key;
EFI_GUID NameGuid;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINTN Size;
EFI_HANDLE LoadFileHandle;
UINT32 AuthenticationStatus;
CHAR16 *UiName;
UINTN UiNameSize;
DEBUG ((DEBUG_INFO, "LoadFileOnFv2:Find a FV!\n"));
Status = gBS->HandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);
ASSERT_EFI_ERROR (Status);
Status = gBS->HandleProtocol (Handle, &gEfiFirmwareVolumeBlockProtocolGuid, (VOID **)&Fvb);
Fvb->GetPhysicalAddress (Fvb, &Address);
DEBUG ((DEBUG_INFO, "LoadFileOnFv2:Fvb->Address=%x \n", Address));
//
// Use Firmware Volume 2 Protocol to search for a FFS files of type
// EFI_FV_FILETYPE_APPLICATION and produce a LoadFile protocol for
// each one found.
//
FileType = EFI_FV_FILETYPE_APPLICATION;
Key = 0;
while (TRUE) {
Status = Fv->GetNextFile (Fv, &Key, &FileType, &NameGuid, &Attributes, &Size);
if (EFI_ERROR (Status)) {
break;
}
UiName = NULL;
Status = Fv->ReadSection (
Fv,
&NameGuid,
EFI_SECTION_USER_INTERFACE,
0,
(VOID **)&UiName,
&UiNameSize,
&AuthenticationStatus
);
if (EFI_ERROR (Status)) {
continue;
}
if (!IsInPrivateList (&NameGuid)) {
Private = (LOAD_FILE_ON_FV2_PRIVATE_DATA *)AllocateCopyPool (sizeof (mLoadFileOnFv2PrivateDataTemplate), &mLoadFileOnFv2PrivateDataTemplate);
ASSERT (Private != NULL);
Private->Fv = Fv;
Private->DevicePath = CreateFileDevicePath (Handle, &NameGuid, UiName);
CopyGuid (&Private->NameGuid, &NameGuid);
LoadFileHandle = NULL;
DEBUG ((DEBUG_INFO, "Find a APPLICATION in this FV!\n"));
Status = gBS->InstallMultipleProtocolInterfaces (
&LoadFileHandle,
&gEfiDevicePathProtocolGuid, Private->DevicePath,
&gEfiLoadFileProtocolGuid, &Private->LoadFile,
NULL
);
if (!EFI_ERROR (Status)) {
InsertTailList (&mPrivateDataList, &Private->Link);
} else {
DEBUG ((DEBUG_ERROR, "Application with the same name %s has been installed.!\n", UiName));
FreePool (Private->DevicePath);
FreePool (Private);
}
}
}
}
/**
This notification function is invoked when an instance of the
LzmaCustomDecompressGuid is produced. It installs another instance of the
EFI_FIRMWARE_VOLUME_PROTOCOL on the handle of the FFS. This notification function
also handles the situation when LZMA decoder driver loaded later than FirmwareVolume driver.
@param Event The event that occured
@param Context Context of event. Not used in this nofication function.
**/
VOID
EFIAPI
FvNotificationEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
UINTN BufferSize;
EFI_HANDLE *Handle;
UINTN Index;
EFI_HANDLE *CurHandle;
Handle = NULL;
Index = 0;
BufferSize = sizeof (EFI_HANDLE);
Handle = AllocateZeroPool (BufferSize);
if (Handle == NULL) {
return;
}
Status = gBS->LocateHandle (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&BufferSize,
Handle
);
if (EFI_BUFFER_TOO_SMALL == Status) {
FreePool (Handle);
Handle = AllocateZeroPool (BufferSize);
if (Handle == NULL) {
return;
}
Status = gBS->LocateHandle (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&BufferSize,
Handle
);
if (EFI_ERROR (Status)) {
return;
}
} else if (EFI_ERROR (Status)) {
return;
}
CurHandle = Handle;
for (Index=0; Index < BufferSize/sizeof (EFI_HANDLE); Index++) {
CurHandle = Handle + Index;
//
// Install LoadFile Protocol
//
InstallFileLoadProtocol (*CurHandle);
}
if (Handle != NULL) {
FreePool (Handle);
}
}
/**
Entry point function initializes global variables and installs notifications.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
LoadFileOnFv2Intialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
InitializeListHead (&mPrivateDataList);
EfiCreateProtocolNotifyEvent (
&gEfiFirmwareVolume2ProtocolGuid,
TPL_CALLBACK,
FvNotificationEvent,
NULL,
&mFvRegistration
);
EfiCreateProtocolNotifyEvent (
&gLzmaCustomDecompressGuid,
TPL_CALLBACK,
FvNotificationEvent,
NULL,
&mFvRegistration
);
return EFI_SUCCESS;
}