c0b7e2b2bf
The HDiskImageSave() function copies a device path using DuplicateDevicePath() and passes that device path to gBS->LocateDevicePath() that changes the value of the device path pointer. When FreePool() is called with the modified device path pointer, the FreePool() service generates an ASSERT() because the signature for the pool head can not be found. The function HDiskImageRead() immediately above HDiskImageSave() has the correct algorithm that uses an additional local variable called DupDevicePathForFree to preserve the pointer to the allocated buffer so it can be used in the call to FreePool(). Bug: <https://bugzilla.tianocore.org/show_bug.cgi?id=131> Cc: Jaben Carsey <jaben.carsey@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Michael Kinney <michael.d.kinney@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Jaben Carsey <Jaben.carsey@intel.com>
423 lines
11 KiB
C
423 lines
11 KiB
C
/** @file
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Functions to deal with Disk buffer.
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Copyright (c) 2005 - 2016, 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_DEVICE_PATH_PROTOCOL *DupDevicePathForFree;
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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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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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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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