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audk/MdeModulePkg/Universal/LoadFileOnFv2/LoadFileOnFv2.c

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/** @file
Produce Load File Protocol for UEFI Applications in Firmware Volumes
Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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)
VOID *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;
}
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