mirror of https://github.com/acidanthera/audk.git
431 lines
14 KiB
C
431 lines
14 KiB
C
/** @file
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Handle services to image file.
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Copyright (c) 2006 - 2008, Intel Corporation. <BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "DxeMain.h"
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#include "Image.h"
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/**
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Search a handle to a device on a specified device path that supports a specified protocol,
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interface of that protocol on that handle is another output.
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@param Protocol The protocol to search for
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@param FilePath The specified device path
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@param Interface Interface of the protocol on the handle
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@param Handle The handle to the device on the specified device
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path that supports the protocol.
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@return Status code.
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**/
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EFI_STATUS
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CoreDevicePathToInterface (
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IN EFI_GUID *Protocol,
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IN EFI_DEVICE_PATH_PROTOCOL **FilePath,
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OUT VOID **Interface,
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OUT EFI_HANDLE *Handle
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)
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{
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EFI_STATUS Status;
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Status = CoreLocateDevicePath (Protocol, FilePath, Handle);
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if (!EFI_ERROR (Status)) {
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Status = CoreHandleProtocol (*Handle, Protocol, Interface);
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}
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return Status;
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}
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/**
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Opens a file for (simple) reading. The simple read abstraction
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will access the file either from a memory copy, from a file
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system interface, or from the load file interface.
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@param BootPolicy Policy for Open Image File.
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@param SourceBuffer Pointer to the memory location containing copy
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of the image to be loaded.
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@param SourceSize The size in bytes of SourceBuffer.
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@param FilePath The specific file path from which the image is
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loaded
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@param DeviceHandle Pointer to the return device handle.
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@param ImageFileHandle Pointer to the image file handle.
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@param AuthenticationStatus Pointer to a caller-allocated UINT32 in which
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the authentication status is returned.
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@retval EFI_SUCCESS Image file successfully opened.
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@retval EFI_LOAD_ERROR If the caller passed a copy of the file, and
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SourceSize is 0.
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@retval EFI_INVALID_PARAMETER File path is not valid.
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@retval EFI_NOT_FOUND File not found.
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**/
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EFI_STATUS
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CoreOpenImageFile (
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IN BOOLEAN BootPolicy,
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IN VOID *SourceBuffer OPTIONAL,
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IN UINTN SourceSize,
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IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,
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OUT EFI_HANDLE *DeviceHandle,
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IN IMAGE_FILE_HANDLE *ImageFileHandle,
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OUT UINT32 *AuthenticationStatus
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)
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{
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EFI_STATUS Status;
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EFI_DEVICE_PATH_PROTOCOL *TempFilePath;
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FILEPATH_DEVICE_PATH *FilePathNode;
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MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FwVolFilePathNode;
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EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;
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EFI_FILE_HANDLE FileHandle;
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EFI_FILE_HANDLE LastHandle;
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EFI_LOAD_FILE_PROTOCOL *LoadFile;
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EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
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EFI_SECTION_TYPE SectionType;
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UINT8 *Pe32Buffer;
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UINTN Pe32BufferSize;
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EFI_FV_FILETYPE Type;
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EFI_FV_FILE_ATTRIBUTES Attrib;
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EFI_FILE_INFO *FileInfo;
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UINTN FileInfoSize;
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EFI_GUID *NameGuid;
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FILEPATH_DEVICE_PATH *OriginalFilePathNode;
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OriginalFilePathNode = NULL;
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*AuthenticationStatus = 0;
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ZeroMem (ImageFileHandle, sizeof (IMAGE_FILE_HANDLE));
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ImageFileHandle->Signature = IMAGE_FILE_HANDLE_SIGNATURE;
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//
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// If the caller passed a copy of the file, then just use it
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//
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if (SourceBuffer != NULL) {
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ImageFileHandle->Source = SourceBuffer;
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ImageFileHandle->SourceSize = SourceSize;
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*DeviceHandle = NULL;
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CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, FilePath, DeviceHandle);
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if (SourceSize > 0) {
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Status = EFI_SUCCESS;
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} else {
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Status = EFI_LOAD_ERROR;
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}
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goto Done;
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}
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//
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// Make sure FilePath is valid
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//
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if (*FilePath == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check to see if it's in a Firmware Volume
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//
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FwVolFilePathNode = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) *FilePath;
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Status = CoreDevicePathToInterface (
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&gEfiFirmwareVolume2ProtocolGuid,
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(EFI_DEVICE_PATH_PROTOCOL **)&FwVolFilePathNode,
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(VOID*)&FwVol,
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DeviceHandle
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);
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if (!EFI_ERROR (Status)) {
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//
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// For FwVol File system there is only a single file name that is a GUID.
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//
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NameGuid = EfiGetNameGuidFromFwVolDevicePathNode (FwVolFilePathNode);
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if (NameGuid != NULL) {
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SectionType = EFI_SECTION_PE32;
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Pe32Buffer = NULL;
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Status = FwVol->ReadSection (
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FwVol,
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NameGuid,
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SectionType,
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0,
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(VOID **)&Pe32Buffer,
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&Pe32BufferSize,
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AuthenticationStatus
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);
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if (EFI_ERROR (Status)) {
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//
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// Try a raw file, since a PE32 SECTION does not exist
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//
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if (Pe32Buffer != NULL) {
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CoreFreePool (Pe32Buffer);
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*AuthenticationStatus = 0;
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}
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Pe32Buffer = NULL;
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Status = FwVol->ReadFile (
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FwVol,
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NameGuid,
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(VOID **)&Pe32Buffer,
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&Pe32BufferSize,
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&Type,
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&Attrib,
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AuthenticationStatus
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);
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}
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if (!EFI_ERROR (Status)) {
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//
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// One of the reads passed so we are done
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//
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ImageFileHandle->Source = Pe32Buffer;
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ImageFileHandle->SourceSize = Pe32BufferSize;
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ImageFileHandle->FreeBuffer = TRUE;
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goto Done;
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}
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}
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}
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//
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// Attempt to access the file via a file system interface
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//
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FilePathNode = (FILEPATH_DEVICE_PATH *) *FilePath;
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Status = CoreDevicePathToInterface (
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&gEfiSimpleFileSystemProtocolGuid,
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(EFI_DEVICE_PATH_PROTOCOL **)&FilePathNode,
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(VOID*)&Volume,
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DeviceHandle
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);
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if (!EFI_ERROR (Status)) {
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//
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// Open the Volume to get the File System handle
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//
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Status = Volume->OpenVolume (Volume, &FileHandle);
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if (!EFI_ERROR (Status)) {
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//
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// Duplicate the device path to avoid the access to unaligned device path node.
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// Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH
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// nodes, It assures the fields in device path nodes are 2 byte aligned.
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//
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FilePathNode = (FILEPATH_DEVICE_PATH *)DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL *)(UINTN)FilePathNode);
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if (FilePathNode == NULL) {
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FileHandle->Close (FileHandle);
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Status = EFI_OUT_OF_RESOURCES;
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} else {
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OriginalFilePathNode = FilePathNode;
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//
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// Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the
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// directory information and filename can be seperate. The goal is to inch
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// our way down each device path node and close the previous node
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//
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while (!IsDevicePathEnd (&FilePathNode->Header)) {
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if (DevicePathType (&FilePathNode->Header) != MEDIA_DEVICE_PATH ||
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DevicePathSubType (&FilePathNode->Header) != MEDIA_FILEPATH_DP) {
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Status = EFI_UNSUPPORTED;
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}
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if (EFI_ERROR (Status)) {
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//
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// Exit loop on Error
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//
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break;
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}
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LastHandle = FileHandle;
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FileHandle = NULL;
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Status = LastHandle->Open (
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LastHandle,
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&FileHandle,
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FilePathNode->PathName,
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EFI_FILE_MODE_READ,
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0
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);
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//
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// Close the previous node
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//
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LastHandle->Close (LastHandle);
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FilePathNode = (FILEPATH_DEVICE_PATH *) NextDevicePathNode (&FilePathNode->Header);
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}
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//
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// Free the allocated memory pool
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//
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CoreFreePool(OriginalFilePathNode);
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}
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if (!EFI_ERROR (Status)) {
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//
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// We have found the file. Now we need to read it. Before we can read the file we need to
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// figure out how big the file is.
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//
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FileInfo = NULL;
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FileInfoSize = 0;
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Status = FileHandle->GetInfo (
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FileHandle,
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&gEfiFileInfoGuid,
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&FileInfoSize,
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FileInfo
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);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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FileInfo = AllocatePool (FileInfoSize);
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if (FileInfo != NULL) {
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Status = FileHandle->GetInfo (
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FileHandle,
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&gEfiFileInfoGuid,
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&FileInfoSize,
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FileInfo
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);
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} else {
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Status = EFI_OUT_OF_RESOURCES;
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goto Done;
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}
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}
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if (!EFI_ERROR (Status)) {
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//
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// Allocate space for the file
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//
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ImageFileHandle->Source = AllocatePool ((UINTN)FileInfo->FileSize);
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if (ImageFileHandle->Source != NULL) {
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//
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// Read the file into the buffer we allocated
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//
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ImageFileHandle->SourceSize = (UINTN) FileInfo->FileSize;
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ImageFileHandle->FreeBuffer = TRUE;
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Status = FileHandle->Read (FileHandle, &ImageFileHandle->SourceSize, ImageFileHandle->Source);
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//
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// Close the file since we are done
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//
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FileHandle->Close (FileHandle);
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CoreFreePool (FileInfo);
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} else {
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Status = EFI_OUT_OF_RESOURCES;
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}
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goto Done;
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}
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}
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}
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}
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//
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// Try LoadFile style
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//
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TempFilePath = *FilePath;
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Status = CoreDevicePathToInterface (
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&gEfiLoadFileProtocolGuid,
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&TempFilePath,
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(VOID*) &LoadFile,
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DeviceHandle
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);
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if (!EFI_ERROR (Status)) {
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//
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// Call LoadFile with the correct buffer size
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//
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ASSERT (ImageFileHandle->SourceSize == 0);
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ASSERT (ImageFileHandle->Source == NULL);
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Status = LoadFile->LoadFile (
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LoadFile,
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TempFilePath,
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BootPolicy,
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&ImageFileHandle->SourceSize,
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ImageFileHandle->Source
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);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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ImageFileHandle->Source = AllocatePool (ImageFileHandle->SourceSize);
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if (ImageFileHandle->Source == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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} else {
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Status = LoadFile->LoadFile (
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LoadFile,
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TempFilePath,
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BootPolicy,
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&ImageFileHandle->SourceSize,
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ImageFileHandle->Source
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);
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}
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}
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if (!EFI_ERROR (Status)) {
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ImageFileHandle->FreeBuffer = TRUE;
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goto Done;
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}
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}
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//
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// Nothing else to try
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//
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DEBUG ((DEBUG_LOAD|DEBUG_WARN, "CoreOpenImageFile: Device did not support a known load protocol\n"));
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Status = EFI_NOT_FOUND;
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Done:
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//
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// If the file was not accessed, clean up
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//
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if (EFI_ERROR (Status)) {
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if (ImageFileHandle->FreeBuffer) {
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//
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// Free the source buffer if we allocated it
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//
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CoreFreePool (ImageFileHandle->Source);
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}
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}
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return Status;
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}
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/**
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Read image file (specified by UserHandle) into user specified buffer with specified offset
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and length.
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@param UserHandle Image file handle
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@param Offset Offset to the source file
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@param ReadSize For input, pointer of size to read; For output,
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pointer of size actually read.
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@param Buffer Buffer to write into
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@retval EFI_SUCCESS Successfully read the specified part of file
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into buffer.
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**/
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EFI_STATUS
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EFIAPI
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CoreReadImageFile (
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IN VOID *UserHandle,
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IN UINTN Offset,
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IN OUT UINTN *ReadSize,
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OUT VOID *Buffer
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)
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{
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UINTN EndPosition;
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IMAGE_FILE_HANDLE *FHand;
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FHand = (IMAGE_FILE_HANDLE *)UserHandle;
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ASSERT (FHand->Signature == IMAGE_FILE_HANDLE_SIGNATURE);
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//
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// Move data from our local copy of the file
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//
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EndPosition = Offset + *ReadSize;
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if (EndPosition > FHand->SourceSize) {
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*ReadSize = (UINT32)(FHand->SourceSize - Offset);
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}
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if (Offset >= FHand->SourceSize) {
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*ReadSize = 0;
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}
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CopyMem (Buffer, (CHAR8 *)FHand->Source + Offset, *ReadSize);
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return EFI_SUCCESS;
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}
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