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/** @file
Functions to deal with Mem buffer
Copyright (c) 2005 - 2018, Intel Corporation. All rights reserved. <BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "HexEditor.h"
extern EFI_HANDLE HImageHandleBackup;
extern HEFI_EDITOR_BUFFER_IMAGE HBufferImage;
extern BOOLEAN HBufferImageNeedRefresh;
extern BOOLEAN HBufferImageOnlyLineNeedRefresh;
extern BOOLEAN HBufferImageMouseNeedRefresh;
extern HEFI_EDITOR_GLOBAL_EDITOR HMainEditor;
HEFI_EDITOR_MEM_IMAGE HMemImage;
HEFI_EDITOR_MEM_IMAGE HMemImageBackupVar;
//
// for basic initialization of HDiskImage
//
HEFI_EDITOR_MEM_IMAGE HMemImageConst = {
NULL,
0,
0
};
/**
Initialization function for HDiskImage.
@retval EFI_SUCCESS The operation was successful.
@retval EFI_LOAD_ERROR A load error occurred.
**/
EFI_STATUS
HMemImageInit (
VOID
)
{
EFI_STATUS Status;
//
// basically initialize the HMemImage
//
CopyMem (&HMemImage, &HMemImageConst, sizeof (HMemImage));
Status = gBS->LocateProtocol (
&gEfiCpuIo2ProtocolGuid,
NULL,
(VOID**)&HMemImage.IoFncs
);
if (!EFI_ERROR (Status)) {
return EFI_SUCCESS;
} else {
return EFI_LOAD_ERROR;
}
}
/**
Backup function for HDiskImage. Only a few fields need to be backup.
This is for making the Disk buffer refresh as few as possible.
@retval EFI_SUCCESS The operation was successful.
**/
EFI_STATUS
HMemImageBackup (
VOID
)
{
HMemImageBackupVar.Offset = HMemImage.Offset;
HMemImageBackupVar.Size = HMemImage.Size;
return EFI_SUCCESS;
}
/**
Set FileName field in HFileImage.
@param[in] Offset The offset.
@param[in] Size The size.
@retval EFI_SUCCESS The operation was successful.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
**/
EFI_STATUS
HMemImageSetMemOffsetSize (
IN UINTN Offset,
IN UINTN Size
)
{
HMemImage.Offset = Offset;
HMemImage.Size = Size;
return EFI_SUCCESS;
}
/**
Read a disk from disk into HBufferImage.
@param[in] Offset The offset.
@param[in] Size The size.
@param[in] Recover if is for recover, no information print.
@retval EFI_LOAD_ERROR A load error occurred.
@retval EFI_SUCCESS The operation was successful.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
**/
EFI_STATUS
HMemImageRead (
IN UINTN Offset,
IN UINTN Size,
IN BOOLEAN Recover
)
{
EFI_STATUS Status;
void *Buffer;
CHAR16 *Str;
HEFI_EDITOR_LINE *Line;
HBufferImage.BufferType = FileTypeMemBuffer;
Buffer = AllocateZeroPool (Size);
if (Buffer == NULL) {
StatusBarSetStatusString (L"Read Memory Failed");
return EFI_OUT_OF_RESOURCES;
}
Status = HMemImage.IoFncs->Mem.Read (
HMemImage.IoFncs,
EfiCpuIoWidthUint8,
Offset,
Size,
Buffer
);
if (EFI_ERROR (Status)) {
FreePool (Buffer);
StatusBarSetStatusString (L"Memory Specified Not Accessible");
return EFI_LOAD_ERROR;
}
HBufferImageFree ();
Status = HBufferImageBufferToList (Buffer, Size);
FreePool (Buffer);
if (EFI_ERROR (Status)) {
StatusBarSetStatusString (L"Read Memory Failed");
return Status;
}
Status = HMemImageSetMemOffsetSize (Offset, Size);
HBufferImage.DisplayPosition.Row = 2;
HBufferImage.DisplayPosition.Column = 10;
HBufferImage.MousePosition.Row = 2;
HBufferImage.MousePosition.Column = 10;
HBufferImage.LowVisibleRow = 1;
HBufferImage.HighBits = TRUE;
HBufferImage.BufferPosition.Row = 1;
HBufferImage.BufferPosition.Column = 1;
if (!Recover) {
Str = CatSPrint(NULL, L"%d Lines Read", HBufferImage.NumLines);
if (Str == NULL) {
StatusBarSetStatusString (L"Read Memory Failed");
return EFI_OUT_OF_RESOURCES;
}
StatusBarSetStatusString (Str);
SHELL_FREE_NON_NULL (Str);
HMainEditor.SelectStart = 0;
HMainEditor.SelectEnd = 0;
}
//
// has line
//
if (HBufferImage.Lines != NULL) {
HBufferImage.CurrentLine = CR (HBufferImage.ListHead->ForwardLink, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
} else {
//
// create a dummy line
//
Line = HBufferImageCreateLine ();
if (Line == NULL) {
StatusBarSetStatusString (L"Read Memory Failed");
return EFI_OUT_OF_RESOURCES;
}
HBufferImage.CurrentLine = Line;
}
HBufferImage.Modified = FALSE;
HBufferImageNeedRefresh = TRUE;
HBufferImageOnlyLineNeedRefresh = FALSE;
HBufferImageMouseNeedRefresh = TRUE;
return EFI_SUCCESS;
}
/**
Save lines in HBufferImage to disk.
@param[in] Offset The offset.
@param[in] Size The size.
@retval EFI_LOAD_ERROR A load error occurred.
@retval EFI_SUCCESS The operation was successful.
@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
**/
EFI_STATUS
HMemImageSave (
IN UINTN Offset,
IN UINTN Size
)
{
EFI_STATUS Status;
VOID *Buffer;
//
// not modified, so directly return
//
if (HBufferImage.Modified == FALSE) {
return EFI_SUCCESS;
}
HBufferImage.BufferType = FileTypeMemBuffer;
Buffer = AllocateZeroPool (Size);
if (Buffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = HBufferImageListToBuffer (Buffer, Size);
if (EFI_ERROR (Status)) {
FreePool (Buffer);
return Status;
}
//
// write back to memory
//
Status = HMemImage.IoFncs->Mem.Write (
HMemImage.IoFncs,
EfiCpuIoWidthUint8,
Offset,
Size,
Buffer
);
FreePool (Buffer);
if (EFI_ERROR (Status)) {
return EFI_LOAD_ERROR;
}
//
// now not modified
//
HBufferImage.Modified = FALSE;
return EFI_SUCCESS;
}
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