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![Hermès Bélusca-Maïto](/assets/img/avatar_default.png)
CORE-9023 FIXES: ====== - Fix parsing of the multiboot options string. NOTE: They are not yet treated in a case-insensitive manner! - Fix a bug in ArcOpen() so that it correctly skips the first path separator (after the adapter-controller-peripheral ARC descriptors). The path separator can be either a backslash or a slash (both are allowed according to the specs); they were also already handled correctly in other parts of the code. - Fix DissectArcPath() so as to: * **OPTIONALLY** (and not mandatorily!) return the path part that follows the ARC adapter-controller-peripheral elements in the ARC path; * make it correctly handle the (yes, optional!!) partition() part in the ARC path, for the multi(x)disk(y)rdisk(z) cases. ENHANCEMENTS: ============= - Directly retrieve the default OS entry as we enumerate them and build their list (i.e. merge the GetDefaultOperatingSystem() helper within InitOperatingSystemList()). - Directly use the opened 'FreeLoader' INI section via its ID in the different functions that need it. - Make the custom-boot and linux loaders honour the boot options they are supposed to support (see FREELDR.INI documentation / template). This includes the 'BootDrive' and 'BootPartition' (alternatively the ARC 'BootPath'). This also allows them to take into account the user-specified choices in the FreeLdr custom-boot editors. - Modify the FreeLdr custom-boot editors so as to correctly honour the priorities of the boot options as specified in the FREELDR.INI documentation / template. - Use stack trick (union of structs) to reduce stack usage in the FreeLdr custom-boot editors, because there are strings buffers that are used in an alternate manner. - Extract out from the editors the LoadOperatingSystem() calls, and move it back into OptionMenuCustomBoot(), so that when this latter function is called there is no risk of having a stack almost full. - When building the ARC-compatible argument vector for the loaders, add the mandatory "SystemPartition" path. This allows the loaders to NOT call the machine-specific MachDiskGetBootPath() later on (this data is indeed passed to them by the boot manager part of FreeLdr). - Improve the FsOpenFile() helper so as to make it: * return an adequate ARC_STATUS instead of a mere uninformative BOOLEAN; * take open options, as well as a default path (optional) that would be prepended to the file name in case the latter is a relative one. - Make RamDiskLoadVirtualFile() return an actual descriptive ARC_STATUS value, and make it take an optional default path (same usage as the one in FsOpenFile() ). + Remove useless NTAPI . - UiInitialize() and TuiTextToColor(), TuiTextToFillStyle(): load or convert named settings into corresponding values using setting table and a tight for-loop, instead of duplicating 10x the same parameter reading logic. - UiInitialize(): Open the "Display" INI section just once. Remove usage of DisplayModeText[] buffer. - UiShowMessageBoxesInSection() and UiShowMessageBoxesInArgv(): reduce code indentation level. ENHANCEMENTS for NT OS loader: ============================== - Don't use MachDiskGetBootPath() but use instead the "SystemPartition" value passed via the ARC argument vector by the boot manager (+ validation checks). Use it as the "default path" when calling FsOpenFile() or loading the ramdisk. - Honour the FreeLdr-specific "Hal=" and "Kernel=" options by converting them into NT standard "/HAL=" and "/KERNEL=" options in the boot command line. Note that if the latter ones are already present on the standard "Options=" option line, they would take precedence over those passed via the separate "Hal=" and "Kernel=" FreeLdr-specific options. Also add some documentation links to Geoff Chappell's website about how the default HAL and KERNEL names are chosen depending on the detected underlying platform on which the NT OS loader is running.
235 lines
7.7 KiB
C
235 lines
7.7 KiB
C
/*
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* FreeLoader
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* Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <freeldr.h>
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#include <debug.h>
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DBG_DEFAULT_CHANNEL(DISK);
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#ifdef _M_IX86
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BOOLEAN DriveMapInstalled = FALSE; // Tells us if we have already installed our drive map int 13h handler code
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ULONG OldInt13HandlerAddress = 0; // Address of BIOS int 13h handler
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ULONG DriveMapHandlerAddress = 0; // Linear address of our drive map handler
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ULONG DriveMapHandlerSegOff = 0; // Segment:offset style address of our drive map handler
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#endif // _M_IX86
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BOOLEAN DriveMapIsValidDriveString(PCSTR DriveString)
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{
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ULONG Index;
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// Now verify that the user has given us appropriate strings
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if ((strlen(DriveString) < 3) ||
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((DriveString[0] != 'f') && (DriveString[0] != 'F') &&
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(DriveString[0] != 'h') && (DriveString[0] != 'H')) ||
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((DriveString[1] != 'd') && (DriveString[1] != 'D')))
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{
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return FALSE;
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}
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// Now verify that the user has given us appropriate numbers
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// Make sure that only numeric characters were given
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for (Index = 2; Index < strlen(DriveString); Index++)
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{
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if (DriveString[Index] < '0' || DriveString[Index] > '9')
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{
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return FALSE;
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}
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}
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// Now make sure that they are not outrageous values (i.e. hd90874)
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if ((atoi(&DriveString[2]) < 0) || (atoi(&DriveString[2]) > 0xff))
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{
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return FALSE;
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}
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return TRUE;
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}
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UCHAR DriveMapGetBiosDriveNumber(PCSTR DeviceName)
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{
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UCHAR BiosDriveNumber = 0;
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TRACE("DriveMapGetBiosDriveNumber(%s)\n", DeviceName);
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// If they passed in a number string then just
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// convert it to decimal and return it
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if (DeviceName[0] >= '0' && DeviceName[0] <= '9')
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{
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return (UCHAR)strtoul(DeviceName, NULL, 0);
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}
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// Convert the drive number string into a number
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// 'hd1' = 1
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BiosDriveNumber = atoi(&DeviceName[2]);
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// If it's a hard disk then set the high bit
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if ((DeviceName[0] == 'h' || DeviceName[0] == 'H') &&
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(DeviceName[1] == 'd' || DeviceName[1] == 'D'))
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{
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BiosDriveNumber |= 0x80;
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}
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return BiosDriveNumber;
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}
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#ifdef _M_IX86
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VOID
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DriveMapMapDrivesInSection(
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IN ULONG_PTR SectionId)
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{
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CHAR SettingName[80];
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CHAR SettingValue[80];
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CHAR Drive1[80];
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CHAR Drive2[80];
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ULONG SectionItemCount;
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ULONG Index;
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ULONG Index2;
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DRIVE_MAP_LIST DriveMapList;
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if (SectionId == 0)
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return;
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RtlZeroMemory(&DriveMapList, sizeof(DRIVE_MAP_LIST));
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// Get the number of items in this section
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SectionItemCount = IniGetNumSectionItems(SectionId);
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// Loop through each one and check if its a DriveMap= setting
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for (Index=0; Index<SectionItemCount; Index++)
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{
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// Get the next setting from the .ini file section
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if (IniReadSettingByNumber(SectionId, Index, SettingName, sizeof(SettingName), SettingValue, sizeof(SettingValue)))
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{
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if (_stricmp(SettingName, "DriveMap") == 0)
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{
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// Make sure we haven't exceeded the drive map max count
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if (DriveMapList.DriveMapCount >= 4)
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{
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UiMessageBox("Max DriveMap count exceeded in section [%s]:\n\n%s=%s", ((PINI_SECTION)SectionId)->SectionName, SettingName, SettingValue);
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continue;
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}
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RtlZeroMemory(Drive1, 80);
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RtlZeroMemory(Drive2, 80);
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strcpy(Drive1, SettingValue);
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// Parse the setting value and separate a string "hd0,hd1"
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// into two strings "hd0" and "hd1"
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for (Index2=0; Index2<strlen(Drive1); Index2++)
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{
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// Check if this character is the separater character (comma - ',')
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if (Drive1[Index2] == ',')
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{
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Drive1[Index2] = '\0';
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strcpy(Drive2, &Drive1[Index2+1]);
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break;
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}
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}
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// Make sure we got good values before we add them to the map
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if (!DriveMapIsValidDriveString(Drive1) || !DriveMapIsValidDriveString(Drive2))
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{
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UiMessageBox("Error in DriveMap setting in section [%s]:\n\n%s=%s", ((PINI_SECTION)SectionId)->SectionName, SettingName, SettingValue);
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continue;
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}
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// Add them to the map
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DriveMapList.DriveMap[(DriveMapList.DriveMapCount * 2)] = DriveMapGetBiosDriveNumber(Drive1);
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DriveMapList.DriveMap[(DriveMapList.DriveMapCount * 2)+1] = DriveMapGetBiosDriveNumber(Drive2);
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DriveMapList.DriveMapCount++;
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TRACE("Mapping BIOS drive 0x%x to drive 0x%x\n", DriveMapGetBiosDriveNumber(Drive1), DriveMapGetBiosDriveNumber(Drive2));
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}
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}
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}
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if (DriveMapList.DriveMapCount)
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{
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TRACE("Installing Int13 drive map for %d drives.\n", DriveMapList.DriveMapCount);
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DriveMapInstallInt13Handler(&DriveMapList);
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}
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else
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{
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TRACE("Removing any previously installed Int13 drive map.\n");
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DriveMapRemoveInt13Handler();
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}
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}
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VOID DriveMapInstallInt13Handler(PDRIVE_MAP_LIST DriveMap)
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{
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ULONG* RealModeIVT = (ULONG*)UlongToPtr(0x00000000);
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USHORT* BiosLowMemorySize = (USHORT*)ULongToPtr(0x00000413);
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if (!DriveMapInstalled)
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{
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// Get the old INT 13h handler address from the vector table
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OldInt13HandlerAddress = RealModeIVT[0x13];
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// Decrease the size of low memory
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(*BiosLowMemorySize)--;
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// Get linear address for drive map handler
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DriveMapHandlerAddress = (ULONG)(*BiosLowMemorySize) << 10;
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// Convert to segment:offset style address
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DriveMapHandlerSegOff = (DriveMapHandlerAddress << 12) & 0xffff0000;
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}
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// Copy the drive map structure to the proper place
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RtlCopyMemory(&DriveMapInt13HandlerMapList, DriveMap, sizeof(DRIVE_MAP_LIST));
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// Set the address of the BIOS INT 13h handler
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DriveMapOldInt13HandlerAddress = OldInt13HandlerAddress;
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// Copy the code to our reserved area
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RtlCopyMemory(UlongToPtr(DriveMapHandlerAddress),
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&DriveMapInt13HandlerStart,
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((PUCHAR)&DriveMapInt13HandlerEnd - (PUCHAR)&DriveMapInt13HandlerStart));
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// Update the IVT
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RealModeIVT[0x13] = DriveMapHandlerSegOff;
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CacheInvalidateCacheData();
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DriveMapInstalled = TRUE;
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}
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VOID DriveMapRemoveInt13Handler(VOID)
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{
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ULONG* RealModeIVT = (ULONG*)0x00000000;
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USHORT* BiosLowMemorySize = (USHORT*)0x00000413;
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if (DriveMapInstalled)
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{
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// Get the old INT 13h handler address from the vector table
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RealModeIVT[0x13] = OldInt13HandlerAddress;
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// Increase the size of low memory
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(*BiosLowMemorySize)++;
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CacheInvalidateCacheData();
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DriveMapInstalled = FALSE;
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}
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}
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#endif // _M_IX86
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