...read the ROM-BIOS?
Author: Nico Bendlin
// An Example of this unit is availabe as Demo Download.
// Ein Beispiel zur Anwendung dieser Unit kann als Demo heruntergeladen werden.
////////////////////////////////////////////////////////////////////////////////
//
// BIOS Helper for Delphi
//
// BIOS related utilities for Win9x and WinNT(i386)
//
////////////////////////////////////////////////////////////////////////////////
//
// The Original Code is:
// BiosHelp.pas, released 2001-09-02.
//
// The Initial Developer of the Original Code is Nico Bendlin.
//
// Portions created by Nico Bendlin are
// Copyright (C) 2001-2003 Nico Bendlin. All Rights Reserved.
//
// Contributor(s):
// Nico Bendlin<nicode@gmx.net>
//
// The contents of this file are subject to the Mozilla Public License Version
// 1.1 (the "License"); you may not use this file except in compliance with the
// License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
// the specific language governing rights and limitations under the License.
//
// Alternatively, the contents of this file may be used under the terms of
// either the GNU General Public License Version 2 or later (the "GPL"), or
// the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
// in which case the provisions of the GPL or the LGPL are applicable instead
// of those above. If you wish to allow use of your version of this file only
// under the terms of either the GPL or the LGPL, and not to allow others to
// use your version of this file under the terms of the MPL, indicate your
// decision by deleting the provisions above and replace them with the notice
// and other provisions required by the GPL or the LGPL. If you do not delete
// the provisions above, a recipient may use your version of this file under
// the terms of any one of the MPL, the GPL or the LGPL.
//
////////////////////////////////////////////////////////////////////////////////
//
// Revision:
//
// 2003-02-15 2.00 [NicoDE]
// - generic dump method completely rewritten
// - default range is now E000:0000-F000:FFFF
//
////////////////////////////////////////////////////////////////////////////////
{$IFDEF CONDITIONALEXPRESSIONS}
{$DEFINE DELPHI6UP}
{$IF NOT DEFINED(VER140)}
{$DEFINE DELPHI7UP}
{$IFEND}
{$ENDIF}
unit BiosHelp {$IFDEF DELPHI6UP} platform {$ENDIF};
{$MINENUMSIZE 4}
{$WEAKPACKAGEUNIT}
{$IFDEF DELPHI7UP}
{$WARN UNSAFE_TYPE OFF}
{$WARN UNSAFE_CODE OFF}
{$ENDIF}
interface
uses
Windows;
const
RomBiosDumpBase = $000E0000;
RomBiosDumpEnd = $000FFFFF;
RomBiosDumpSize = RomBiosDumpEnd - RomBiosDumpBase + 1;
type
PRomBiosDump = ^TRomBiosDump;
TRomBiosDump = array [RomBiosDumpBase..RomBiosDumpEnd] of Byte;
type
TRomDumpMethod = (rdmAutomatic, // Autodetect OS type and use proper method
rdmGeneric, // Use 16-bit EXE program to dump the BIOS
rdmMemory, // Dump from process's address space (Win9x)
rdmPhysical // Dump from physical memory object (WinNT)
);
function DumpRomBios(out Dump: TRomBiosDump;
Method: TRomDumpMethod = rdmAutomatic; Timeout: DWORD = 5000): Boolean;
function DumpRomBiosEx(RomBase: Pointer; RomSize: Cardinal; out Dump;
Method: TRomDumpMethod = rdmAutomatic; Timeout: DWORD = 5000): Boolean;
procedure ReadRomDumpBuffer(const Dump: TRomBiosDump; Addr: Pointer;
var Buffer; Size: Cardinal);
procedure ReadRomDumpBufferEx(const Dump; Base, Addr: Pointer;
var Buffer; Size: Cardinal);
function GetRomDumpAddr(const Dump: TRomBiosDump; Addr: Pointer): Pointer;
function GetRomDumpAddrEx(const Dump; Base, Addr: Pointer): Pointer;
implementation
////////////////////////////////////////////////////////////////////////////////
//
// DumpRomBios16 (rdmGeneric)
//
// Creates an 16-bit EXE program in TEMP and runs it redirected to an file.
//
// WARNING: One day 16-bit code will not run on future Windows.
// WARNING: You are dumping the BIOS inside the MS-DOS 'emulator'.
//
function _RomDumpCode(RomBase: Pointer; RomSize: Cardinal;
out Code: Pointer; out Size: Cardinal): Boolean;
const
BlockSize = $1000;
type // ; RomDump (dumps mem to STDOUT)
PRomDumpCode = ^TRomDumpCode; // ; BlockSize MUST be multiple of 10h.
TRomDumpCode = packed record //
_header: TImageDosHeader; //
_notice: array[0..$4F] of AnsiChar; // @@note: db 'RomDump 2.0', ...
init: packed record // @@init:
_mov_44: array[0..2] of Byte; // mov ax, 4400h
_mov_bx: array[0..2] of Byte; // mov bx, 0001h
_dos_21: array[0..1] of Byte; // int 21h
_jcf_18: array[0..1] of Byte; // jc @@code
_and_dx: array[0..3] of Byte; // and dx, 0082h
_cmp_dx: array[0..3] of Byte; // cmp dx, 0082h
_jne_0E: array[0..1] of Byte; // jne @@code
_psh_cs: Byte; // push cs
_pop_ds: Byte; // push ds
_mov_dx: array[0..2] of Byte; // mov dx, offset @@note
_mov_09: array[0..1] of Byte; // mov ah, 09h
_int_21: array[0..1] of Byte; // int 21h
_mov_4C: array[0..2] of Byte; // mov ax, 4C01h
_int_20: array[0..1] of Byte; // int 21h
end; //
code: packed record // @@code:
_mov_cx: Byte;
BlockCount: Word; // mov cx, <BlockCount>
_mov_dx: Byte;
DatSegment: Word; // mov dx, <DatSegment>
_jcx_1C: array[0..1] of Byte; // jcxz @@rest
end; //
loop: packed record // @@loop:
_psh_cx: Byte; // push cx
_psh_dx: Byte; // push dx
_mov_ds: array[0..1] of Byte; // mov ds, dx
_mov_dx: Byte;
DatOffset: Word; // mov dx, <DatOffset>
_mov_cx: array[0..2] of Byte; // mov cx, <BlockSize>
_mov_bx: array[0..2] of Byte; // mov bx, 0001h
_mov_ax: array[0..2] of Byte; // mov ax, 4000h
_int_21: array[0..1] of Byte; // int 21h
_pop_dx: Byte; // pop dx
_pop_cx: Byte; // pop cx
_jcf_1C: array[0..1] of Byte; // jc @@exit
_add_dx: array[0..3] of Byte; // add dx, <BlockSize/10h>
_lop_E4: array[0..1] of Byte; // loop @@loop
end; //
rest: packed record // @@rest:
_mov_ds: array[0..1] of Byte; // mov ds, dx
_mov_dx: Byte;
DatOffset: Word; // mov dx, <DatOffset>
_mov_cx: Byte;
LenghtMod: Word; // mov cx, <LenghtMod>
_mov_bx: array[0..2] of Byte; // mov bx, 0001h
_mov_ax: array[0..2] of Byte; // mov ax, 4000h
_jcx_06: array[0..1] of Byte; // jcxz @@exit
_int_21: array[0..1] of Byte; // int 21h
_jcf_02: array[0..1] of Byte; // jc @@exit
_mov_al: array[0..1] of Byte; // mov al, 00h
end; //
Exit: packed record // @@exit:
_mov_ah: array[0..1] of Byte; // mov ah, 4Ch
_int_21: array[0..1] of Byte; // int 21h
end; //
end;
const
RomDumpCodeSize = SizeOf(TRomDumpCode) - SizeOf(TImageDosHeader);
RomDumpCode: TRomDumpCode = (_header: (e_magic: IMAGE_DOS_SIGNATURE;
e_cblp: Word(RomDumpCodeSize) and $1FF;
e_cp: Word((RomDumpCodeSize - 1) shr 9) + 1;
e_crlc: $0000;
e_cparhdr: SizeOf(TImageDosHeader) shr 4;
e_minalloc: $0000;
e_maxalloc: $FFFF;
e_ss: $0000;
e_sp: $1000;
e_csum: $0000;
e_ip: SizeOf(RomDumpCode._notice);
e_cs: $0000;
e_lfarlc: SizeOf(TImageDosHeader);
e_ovno: $0000;
e_res: ($0000, $0000, $0000, $0000);
e_oemid: $0000;
e_oeminfo: $0000;
e_res2: ($0000, $0000, $0000, $0000, $0000, $0000, $0000, $0000,
$0000, $0000);
_lfanew: $00000000
);
_notice: #13#10 +
'RomDump 2.0'#13#10 +
'Copyright (c) 2003 Nico Bendlin'#13#10 +
#13#10 +
'Usage: RomDump > filename'#13#10 +
#13#10'$';
init: (_mov_44: ($B8, $00, $44);
_mov_bx: ($BB, $01, $00);
_dos_21: ($CD, $21);
_jcf_18: ($72, $18);
_and_dx: ($81, $E2, $82, $00);
_cmp_dx: ($81, $FA, $82, $00);
_jne_0E: ($75, $0E);
_psh_cs: $0E;
_pop_ds: $1F;
_mov_dx: ($BA, $00, $00);
_mov_09: ($B4, $09);
_int_21: ($CD, $21);
_mov_4C: ($B8, $01, $4C);
_int_20: ($CD, $21);
);
code: (_mov_cx: $B9; BlockCount: $0010;
_mov_dx: $BA; DatSegment: $F000;
_jcx_1C: ($E3, $1C)
);
loop: (_psh_cx: $51;
_psh_dx: $52;
_mov_ds: ($8E, $DA);
_mov_dx: $BA; DatOffset: $0000;
_mov_cx: ($B9, Lo(BlockSize), Hi(BlockSize));
_mov_bx: ($BB, $01, $00);
_mov_ax: ($B8, $00, $40);
_int_21: ($CD, $21);
_pop_dx: $5A;
_pop_cx: $59;
_jcf_1C: ($72, $1C);
_add_dx: ($81, $C2, Lo(BlockSize shr 4), Hi(BlockSize shr 4));
_lop_E4: ($E2, $E4)
);
rest: (_mov_ds: ($8E, $DA);
_mov_dx: $BA; DatOffset: $0000;
_mov_cx: $B9; LenghtMod: $0000;
_mov_bx: ($BB, $01, $00);
_mov_ax: ($B8, $00, $40);
_jcx_06: ($E3, $06);
_int_21: ($CD, $21);
_jcf_02: ($72, $02);
_mov_al: ($B0, $00)
);
Exit: (_mov_ah: ($B4, $4C);
_int_21: ($CD, $21)
)
);
begin
Result := False;
if (RomSize > 0) and (RomSize <= $100000) and
(Cardinal(RomBase) < $100000) and
(Cardinal(RomBase) + RomSize <= $100000) then
begin
Size := SizeOf(TRomDumpCode);
Code := Pointer(LocalAlloc(LPTR, Size));
if Code <> nil then
try
PRomDumpCode(Code)^ := RomDumpCode;
with PRomDumpCode(Code)^ do
begin
code.BlockCount := Word(RomSize div BlockSize);
code.DatSegment := Word(Cardinal(RomBase) shr 4);
loop.DatOffset := Word(Cardinal(RomBase)) and $000F;
rest.DatOffset := loop.DatOffset;
rest.LenghtMod := Word(RomSize mod BlockSize);
end;
Result := True;
except
LocalFree(HLOCAL(Code));
Code := nil;
Size := 0;
end;
end;
end;
function _SaveRomDumpCodeToFile(RomBase: Pointer; RomSize: Cardinal;
const FileName: string): Boolean;
var
Code: Pointer;
Size: Cardinal;
Hand: THandle;
Num: DWORD;
begin
Result := False;
if _RomDumpCode(RomBase, RomSize, Code, Size) then
try
Hand := CreateFile(PChar(FileName), GENERIC_WRITE, FILE_SHARE_READ, nil,
CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
if Hand <> INVALID_HANDLE_VALUE then
try
Result := WriteFile(Hand, Code^, Size, Num, nil) and (Num = Size);
if not Result then
DeleteFile(PChar(FileName));
finally
CloseHandle(Hand);
end;
finally
LocalFree(HLOCAL(Code));
end;
end;
function _ExecuteRomDumpCode(const Code, Dump: string; Timeout: DWORD): Boolean;
var
ComSpec: string;
StartInfo: TStartupInfo;
ProcInfo: TProcessInformation;
ErrorMode: Cardinal;
begin
Result := False;
SetLength(ComSpec, MAX_PATH + 1);
SetLength(ComSpec,
GetEnvironmentVariable('ComSpec', PChar(@ComSpec[1]), MAX_PATH));
if Length(ComSpec) <= 0 then
Exit;
FillChar(StartInfo, SizeOf(TStartupInfo), 0);
StartInfo.cb := SizeOf(TStartupInfo);
StartInfo.dwFlags := STARTF_USESHOWWINDOW;
StartInfo.wShowWindow := SW_HIDE;
ErrorMode := SetErrorMode(SEM_FAILCRITICALERRORS or SEM_NOGPFAULTERRORBOX or
SEM_NOALIGNMENTFAULTEXCEPT or SEM_NOOPENFILEERRORBOX);
try
if CreateProcess(nil, PChar(ComSpec + ' /C ' + Code + ' > ' + Dump),
nil, nil, False, HIGH_PRIORITY_CLASS, nil, nil, StartInfo, ProcInfo) then
try
Result :=
(WaitForSingleObject(ProcInfo.hProcess, Timeout) <> WAIT_TIMEOUT);
if not Result then
TerminateProcess(ProcInfo.hProcess, STATUS_TIMEOUT);
finally
CloseHandle(ProcInfo.hThread);
CloseHandle(ProcInfo.hProcess);
end;
finally
SetErrorMode(ErrorMode);
end;
end;
function DumpRomBios16(RomBase: Pointer; RomSize: Cardinal; var Dump;
Timeout: DWORD): Boolean;
var
Tmp: array [0..MAX_PATH] of Char;
Dmp: array [0..MAX_PATH] of Char;
Exe: array [0..MAX_PATH] of Char;
Hnd: THandle;
Num: DWORD;
begin
Result := False;
if GetTempPath(MAX_PATH, Tmp) > 0 then
GetShortPathName(Tmp, Tmp, MAX_PATH)
else
lstrcpy(Tmp, '.');
if GetTempFileName(Tmp, 'rom', 0, Dmp) > 0 then
try
lstrcpy(Exe, Dmp);
lstrcat(Exe, '.exe'); // Win9x requires .EXE extention
if _SaveRomDumpCodeToFile(RomBase, RomSize, Exe) then
try
if _ExecuteRomDumpCode(Exe, Dmp, Timeout) then
begin
Hnd := CreateFile(Dmp, GENERIC_READ, FILE_SHARE_READ or
FILE_SHARE_WRITE, nil, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if Hnd <> INVALID_HANDLE_VALUE then
try
Result := ReadFile(Hnd, Dump, RomSize, Num, nil) and (Num = RomSize);
finally
CloseHandle(Hnd);
end;
end;
finally
DeleteFile(Exe);
end;
finally
DeleteFile(Dmp);
end;
end;
////////////////////////////////////////////////////////////////////////////////
//
// DumpRomBios9x (rdmMemory)
//
// Win9x maps the BIOS into every process - therefore it's directly accessed.
//
function DumpRomBios9x(RomBase: Pointer; RomSize: Cardinal; var Dump): Boolean;
begin
Result := False;
try
Move(RomBase^, Dump, RomSize);
Result := True;
except
// ignore exeptions
end
end;
////////////////////////////////////////////////////////////////////////////////
//
// DumpRomBiosNt (rdmPhysical)
//
// On WinNT the BIOS is accessable through section '\Device\PhysicalMemory'.
// This object can only be opened by members of local 'Adminstrators' group.
// ZwOpenSection and RtlNtStatusToDosError are documented in newer MSDN/DDK.
//
type
NTSTATUS = Integer;
PUnicodeString = ^TUnicodeString;
TUnicodeString = packed record
Length: Word;
MaximumLength: Word;
Buffer: PWideChar;
end;
PObjectAttributes = ^TObjectAttributes;
TObjectAttributes = record
Length: ULONG;
RootDirectory: THandle;
ObjectName: PUnicodeString;
Attributes: ULONG;
SecurityDescriptor: PSecurityDescriptor;
SecurityQualityOfService: PSecurityQualityOfService;
end;
TFNZwOpenSection = function(out Section: THandle; Access: ACCESS_MASK;
Attributes: PObjectAttributes): NTSTATUS;
stdcall;
TFNRtlNtStatusToDosError = function(Status: NTSTATUS): DWORD;
stdcall;
const
PhysMemDevName = '\Device\PhysicalMemory';
PhysMemName: TUnicodeString = (Length: Length(PhysMemDevName) * SizeOf(WideChar);
MaximumLength: Length(PhysMemDevName) * SizeOf(WideChar) + SizeOf(WideChar);
Buffer: PhysMemDevName;
);
PhysMemMask: ACCESS_MASK = SECTION_MAP_READ;
PhysMemAttr: TObjectAttributes = (Length: SizeOf(TObjectAttributes);
RootDirectory: 0;
ObjectName: @PhysMemName;
Attributes: $00000040; // OBJ_CASE_INSENSITIVE
SecurityDescriptor: nil;
SecurityQualityOfService: nil;
);
var
ZwOpenSection: TFNZwOpenSection;
RtlNtStatusToDosError: TFNRtlNtStatusToDosError;
function DumpRomBiosNt(RomBase: Pointer; RomSize: Cardinal; var Dump): Boolean;
var
HMod: HMODULE;
Stat: NTSTATUS;
Sect: THandle;
View: Pointer;
begin
Result := False;
HMod := GetModuleHandle('ntdll.dll');
if HMod = 0 then
SetLastError(ERROR_CALL_NOT_IMPLEMENTED)
else
begin
if not Assigned(ZwOpenSection) then
ZwOpenSection := GetProcAddress(HMod, 'ZwOpenSection');
if not Assigned(RtlNtStatusToDosError) then
RtlNtStatusToDosError := GetProcAddress(HMod, 'RtlNtStatusToDosError');
if not Assigned(ZwOpenSection) or not Assigned(RtlNtStatusToDosError) then
SetLastError(ERROR_CALL_NOT_IMPLEMENTED)
else
begin
Stat := ZwOpenSection(Sect, PhysMemMask, @PhysMemAttr);
if Stat >= 0 then
try
View := MapViewOfFile(Sect, PhysMemMask, 0, Cardinal(RomBase), RomSize);
if View <> nil then
try
Move(View^, Dump, RomSize);
Result := True;
finally
UnmapViewOfFile(View);
end;
finally
CloseHandle(Sect);
end
else
SetLastError(RtlNtStatusToDosError(Stat));
end;
end;
end;
////////////////////////////////////////////////////////////////////////////////
//
// DumpRomBios(Ex)
//
// Public functions to call OS-dependent implementations.
//
function DumpRomBios(out Dump: TRomBiosDump;
Method: TRomDumpMethod = rdmAutomatic; Timeout: DWORD = 5000): Boolean;
begin
Result := DumpRomBiosEx(Pointer(RomBiosDumpBase), RomBiosDumpSize, Dump,
Method, Timeout);
end;
function DumpRomBiosEx(RomBase: Pointer; RomSize: Cardinal; out Dump;
Method: TRomDumpMethod = rdmAutomatic; Timeout: DWORD = 5000): Boolean;
begin
Result := False;
case Method of
rdmAutomatic:
if (GetVersion() and $80000000) <> 0 then
Result := DumpRomBios9x(RomBase, RomSize, Dump)
else
begin
Result := DumpRomBiosNt(RomBase, RomSize, Dump);
if not Result then
DumpRomBios16(RomBase, RomSize, Dump, DWORD(Timeout));
end;
rdmGeneric:
Result := DumpRomBios16(RomBase, RomSize, Dump, DWORD(Timeout));
rdmMemory:
Result := DumpRomBios9x(RomBase, RomSize, Dump);
rdmPhysical:
Result := DumpRomBiosNt(RomBase, RomSize, Dump);
else
SetLastError(ERROR_INVALID_PARAMETER);
end;
end;
////////////////////////////////////////////////////////////////////////////////
//
// ReadRomDumpBuffer(Ex) / GetRomDumpAddr(Ex)
//
// Utilities to simplify the access to dumps.
//
procedure ReadRomDumpBuffer(const Dump: TRomBiosDump; Addr: Pointer;
var Buffer; Size: Cardinal);
begin
Move(Dump[Cardinal(Addr)], Buffer, Size);
end;
procedure ReadRomDumpBufferEx(const Dump; Base, Addr: Pointer;
var Buffer; Size: Cardinal);
begin
Move(Pointer(Cardinal(@Dump) + Cardinal(Addr) - Cardinal(Base))^,
Buffer, Size);
end;
function GetRomDumpAddr(const Dump: TRomBiosDump; Addr: Pointer): Pointer;
begin
Result := @Dump[Cardinal(Addr)];
end;
function GetRomDumpAddrEx(const Dump; Base, Addr: Pointer): Pointer;
begin
Result := Pointer(Cardinal(@Dump) + Cardinal(Addr) - Cardinal(Base));
end;
end.
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