mirror of https://github.com/acidanthera/audk.git
421 lines
11 KiB
C
421 lines
11 KiB
C
/** @file
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Functions to deal with Disk buffer.
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Copyright (c) 2005 - 2011, Intel Corporation. All rights reserved. <BR>
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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 "HexEditor.h"
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#include <Protocol/BlockIo.h>
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extern EFI_HANDLE HImageHandleBackup;
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extern HEFI_EDITOR_BUFFER_IMAGE HBufferImage;
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extern BOOLEAN HBufferImageNeedRefresh;
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extern BOOLEAN HBufferImageOnlyLineNeedRefresh;
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extern BOOLEAN HBufferImageMouseNeedRefresh;
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extern HEFI_EDITOR_GLOBAL_EDITOR HMainEditor;
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HEFI_EDITOR_DISK_IMAGE HDiskImage;
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HEFI_EDITOR_DISK_IMAGE HDiskImageBackupVar;
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//
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// for basic initialization of HDiskImage
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//
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HEFI_EDITOR_DISK_IMAGE HDiskImageConst = {
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NULL,
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0,
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0,
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0
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};
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/**
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Initialization function for HDiskImage.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_LOAD_ERROR A load error occured.
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**/
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EFI_STATUS
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HDiskImageInit (
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VOID
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)
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{
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//
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// basically initialize the HDiskImage
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//
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CopyMem (&HDiskImage, &HDiskImageConst, sizeof (HDiskImage));
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CopyMem (&HDiskImageBackupVar, &HDiskImageConst, sizeof (HDiskImageBackupVar));
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return EFI_SUCCESS;
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}
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/**
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Backup function for HDiskImage. Only a few fields need to be backup.
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This is for making the Disk buffer refresh as few as possible.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES gST->ConOut of resources.
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**/
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EFI_STATUS
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HDiskImageBackup (
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VOID
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)
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{
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//
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// backup the disk name, offset and size
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//
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//
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SHELL_FREE_NON_NULL (HDiskImageBackupVar.Name);
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HDiskImageBackupVar.Name = CatSPrint(NULL, L"%s", HDiskImage.Name);
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if (HDiskImageBackupVar.Name == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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HDiskImageBackupVar.Offset = HDiskImage.Offset;
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HDiskImageBackupVar.Size = HDiskImage.Size;
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return EFI_SUCCESS;
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}
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/**
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Cleanup function for HDiskImage.
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@retval EFI_SUCCESS The operation was successful.
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**/
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EFI_STATUS
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HDiskImageCleanup (
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VOID
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)
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{
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SHELL_FREE_NON_NULL (HDiskImage.Name);
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SHELL_FREE_NON_NULL (HDiskImageBackupVar.Name);
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return EFI_SUCCESS;
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}
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/**
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Set FileName field in HFileImage.
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@param[in] Str File name to set.
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@param[in] Offset The offset.
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@param[in] Size The size.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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EFIAPI
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HDiskImageSetDiskNameOffsetSize (
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IN CONST CHAR16 *Str,
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IN UINTN Offset,
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IN UINTN Size
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)
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{
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UINTN Len;
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UINTN Index;
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//
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// free the old file name
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//
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SHELL_FREE_NON_NULL (HDiskImage.Name);
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Len = StrLen (Str);
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HDiskImage.Name = AllocateZeroPool (2 * (Len + 1));
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if (HDiskImage.Name == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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for (Index = 0; Index < Len; Index++) {
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HDiskImage.Name[Index] = Str[Index];
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}
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HDiskImage.Name[Len] = L'\0';
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HDiskImage.Offset = Offset;
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HDiskImage.Size = Size;
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return EFI_SUCCESS;
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}
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/**
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Read a disk from disk into HBufferImage.
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@param[in] DeviceName filename to read.
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@param[in] Offset The offset.
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@param[in] Size The size.
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@param[in] Recover if is for recover, no information print.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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@retval EFI_LOAD_ERROR A load error occured.
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@retval EFI_INVALID_PARAMETER A parameter was invalid.
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**/
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EFI_STATUS
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HDiskImageRead (
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IN CONST CHAR16 *DeviceName,
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IN UINTN Offset,
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IN UINTN Size,
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IN BOOLEAN Recover
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)
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{
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CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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EFI_DEVICE_PATH_PROTOCOL *DupDevicePath;
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EFI_DEVICE_PATH_PROTOCOL *DupDevicePathForFree;
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EFI_HANDLE Handle;
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EFI_BLOCK_IO_PROTOCOL *BlkIo;
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EFI_STATUS Status;
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VOID *Buffer;
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CHAR16 *Str;
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UINTN Bytes;
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HEFI_EDITOR_LINE *Line;
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HBufferImage.BufferType = FileTypeDiskBuffer;
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DevicePath = gEfiShellProtocol->GetDevicePathFromMap(DeviceName);
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if (DevicePath == NULL) {
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StatusBarSetStatusString (L"Cannot Find Device");
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return EFI_INVALID_PARAMETER;
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}
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DupDevicePath = DuplicateDevicePath(DevicePath);
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DupDevicePathForFree = DupDevicePath;
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//
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// get blkio interface
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//
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Status = gBS->LocateDevicePath(&gEfiBlockIoProtocolGuid,&DupDevicePath,&Handle);
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FreePool(DupDevicePathForFree);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return Status;
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}
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Status = gBS->OpenProtocol(Handle, &gEfiBlockIoProtocolGuid, (VOID**)&BlkIo, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return Status;
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}
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//
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// if Offset exceeds LastBlock,
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// return error
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//
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if (Offset > BlkIo->Media->LastBlock || Offset + Size > BlkIo->Media->LastBlock) {
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StatusBarSetStatusString (L"Invalid Offset + Size");
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return EFI_LOAD_ERROR;
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}
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Bytes = BlkIo->Media->BlockSize * Size;
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Buffer = AllocateZeroPool (Bytes);
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if (Buffer == NULL) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// read from disk
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//
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Status = BlkIo->ReadBlocks (
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BlkIo,
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BlkIo->Media->MediaId,
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Offset,
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Bytes,
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Buffer
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);
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if (EFI_ERROR (Status)) {
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FreePool (Buffer);
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StatusBarSetStatusString (L"Read Disk Failed");
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return EFI_LOAD_ERROR;
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}
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HBufferImageFree ();
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//
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// convert buffer to line list
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//
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Status = HBufferImageBufferToList (Buffer, Bytes);
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FreePool (Buffer);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return Status;
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}
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Status = HDiskImageSetDiskNameOffsetSize (DeviceName, Offset, Size);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// initialize some variables
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//
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HDiskImage.BlockSize = BlkIo->Media->BlockSize;
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HBufferImage.DisplayPosition.Row = 2;
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HBufferImage.DisplayPosition.Column = 10;
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HBufferImage.MousePosition.Row = 2;
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HBufferImage.MousePosition.Column = 10;
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HBufferImage.LowVisibleRow = 1;
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HBufferImage.HighBits = TRUE;
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HBufferImage.BufferPosition.Row = 1;
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HBufferImage.BufferPosition.Column = 1;
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if (!Recover) {
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Str = CatSPrint(NULL, L"%d Lines Read", HBufferImage.NumLines);
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if (Str == NULL) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return EFI_OUT_OF_RESOURCES;
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}
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StatusBarSetStatusString (Str);
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SHELL_FREE_NON_NULL (Str);
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HMainEditor.SelectStart = 0;
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HMainEditor.SelectEnd = 0;
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}
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//
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// has line
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//
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if (HBufferImage.Lines != NULL) {
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HBufferImage.CurrentLine = CR (
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HBufferImage.ListHead->ForwardLink,
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HEFI_EDITOR_LINE,
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Link,
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EFI_EDITOR_LINE_LIST
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);
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} else {
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//
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// create a dummy line
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//
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Line = HBufferImageCreateLine ();
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if (Line == NULL) {
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StatusBarSetStatusString (L"Read Disk Failed");
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return EFI_OUT_OF_RESOURCES;
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}
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HBufferImage.CurrentLine = Line;
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}
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HBufferImage.Modified = FALSE;
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HBufferImageNeedRefresh = TRUE;
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HBufferImageOnlyLineNeedRefresh = FALSE;
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HBufferImageMouseNeedRefresh = TRUE;
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return EFI_SUCCESS;
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}
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/**
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Save lines in HBufferImage to disk.
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NOT ALLOW TO WRITE TO ANOTHER DISK!!!!!!!!!
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@param[in] DeviceName The device name.
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@param[in] Offset The offset.
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@param[in] Size The size.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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@retval EFI_LOAD_ERROR A load error occured.
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@retval EFI_INVALID_PARAMETER A parameter was invalid.
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**/
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EFI_STATUS
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HDiskImageSave (
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IN CHAR16 *DeviceName,
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IN UINTN Offset,
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IN UINTN Size
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)
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{
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CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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EFI_DEVICE_PATH_PROTOCOL *DupDevicePath;
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EFI_BLOCK_IO_PROTOCOL *BlkIo;
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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VOID *Buffer;
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UINTN Bytes;
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//
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// if not modified, directly return
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//
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if (HBufferImage.Modified == FALSE) {
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return EFI_SUCCESS;
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}
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HBufferImage.BufferType = FileTypeDiskBuffer;
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DevicePath = gEfiShellProtocol->GetDevicePathFromMap(DeviceName);
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if (DevicePath == NULL) {
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// StatusBarSetStatusString (L"Cannot Find Device");
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return EFI_INVALID_PARAMETER;
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}
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DupDevicePath = DuplicateDevicePath(DevicePath);
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//
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// get blkio interface
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//
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Status = gBS->LocateDevicePath(&gEfiBlockIoProtocolGuid,&DupDevicePath,&Handle);
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FreePool(DupDevicePath);
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if (EFI_ERROR (Status)) {
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// StatusBarSetStatusString (L"Read Disk Failed");
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return Status;
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}
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Status = gBS->OpenProtocol(Handle, &gEfiBlockIoProtocolGuid, (VOID**)&BlkIo, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
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if (EFI_ERROR (Status)) {
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// StatusBarSetStatusString (L"Read Disk Failed");
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return Status;
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}
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Bytes = BlkIo->Media->BlockSize * Size;
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Buffer = AllocateZeroPool (Bytes);
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if (Buffer == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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//
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// concatenate the line list to a buffer
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//
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Status = HBufferImageListToBuffer (Buffer, Bytes);
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if (EFI_ERROR (Status)) {
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FreePool (Buffer);
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return Status;
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}
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//
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// write the buffer to disk
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//
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Status = BlkIo->WriteBlocks (
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BlkIo,
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BlkIo->Media->MediaId,
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Offset,
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Bytes,
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Buffer
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);
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FreePool (Buffer);
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if (EFI_ERROR (Status)) {
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return EFI_LOAD_ERROR;
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}
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//
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// now not modified
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//
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HBufferImage.Modified = FALSE;
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return EFI_SUCCESS;
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}
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