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[注意]rmcoff 2.0开发进度
发表于: 2009-12-8 11:58 5116

[注意]rmcoff 2.0开发进度

mickeylan 活跃值
14
2009-12-8 11:58
5116
rmcoff 2.0的开发工作已接近尾声，目前已进入测试阶段，相信很快就能放出alpha版供大家测试了。
相比1.0版本，新版本在执行效率及转换后的coff格式文件的质量上均有较大的提高，解决了跨单元变量引用等bug。以下以一个简单的驱动来对比对一下1.0版本和2.0版本。
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unit driver;
 
interface
 
uses nt_status, ntoskrnl;
 
function _DriverEntry(DriverObject:PDriverObject;RegistryPath:PUnicodeString):NTSTATUS; stdcall;
 
implementation
 
procedure DriverUnload(DriverObject:PDriverObject); stdcall;
begin
 DbgPrint('DriverUnload(DriverObject:0x%.8X)',DriverObject);
 DbgPrint('DriverUnload(-)');
end;
 
function _DriverEntry(DriverObject:PDriverObject;RegistryPath:PUnicodeString):NTSTATUS; stdcall;
begin
 DbgPrint('DriverEntry(DriverObject:0x%.8X;RegistryPath:0x%.8X)', DriverObject, RegistryPath);
 
 DriverObject^.DriverUnload:=@DriverUnload;
 
 Result:=STATUS_SUCCESS;
 DbgPrint('DriverEntry(-):0x%.8X', Result);
end;
 
end.


上面是一个最简单的驱动程序，这里使用Delphi 2010编译。先看一下dcc32编译生成的OMF格式文件dump出来的信息：
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Turbo Dump  Version 6.3.0.0 Copyright (c) 1988-2009 Embarcadero Technologies, Inc.
                    Display of File driver.obj
 
000000 THEADR  driver.pas
00000F COMENT  Purge: No , List: Yes, Class: 0   (000h)
    Translator: Delphi Pascal V21.0
000029 COMENT  Purge: Yes, List: Yes, Class: 251 (0FBh), SubClass: 12 (0Ch)
    Package Module Record, Lead Byte: 01h, Flags: 00004000h
000034 COMENT  Purge: No , List: Yes, Class: 251 (0FBh), SubClass: 10 (0Ah)
    Implements: driver.obj
000046 COMENT  Purge: No , List: Yes, Class: 251 (0FBh), SubClass: 8 (08h)
    Link: ntoskrnl.obj
00005A COMENT  Purge: No , List: Yes, Class: 251 (0FBh), SubClass: 8 (08h)
    Link: nt_status.obj
00006F COMENT  Purge: No , List: Yes, Class: 251 (0FBh), SubClass: 8 (08h)
    Link: SysInit.obj
000082 COMENT  Purge: No , List: Yes, Class: 251 (0FBh), SubClass: 8 (08h)
    Link: System.obj
000094 LNAMES
    Name  1: ''
    Name  2: '_TEXT'
    Name  3: 'CODE'
    Name  4: '_DATA'
    Name  5: 'DATA'
    Name  6: '_BSS'
    Name  7: 'BSS'
    Name  8: '$$BSYMS'
    Name  9: 'DEBSYM'
    Name 10: '$$BTYPES'
    Name 11: 'DEBTYP'
    Name 12: '$$BNAMES'
    Name 13: 'DEBNAM'
    Name 14: '$$BROWSE'
    Name 15: 'DEBSYM'
    Name 16: '$$BROWFILE'
    Name 17: 'DEBSYM'
    Name 18: 'DGROUP'
    Name 19: '_TLS'
    Name 20: 'TLS'
    Name 21: '_INIT_'
    Name 22: 'INITDATA'
    Name 23: '_EXIT_'
    Name 24: 'EXITDATA'
000139 SEGDEF 1 : _TEXT           DWORD PUBLIC  USE32 Class 'CODE'   Length: 0000
000143 SEGDEF 2 : _DATA           DWORD PUBLIC  USE32 Class 'DATA'   Length: 0000
00014D SEGDEF 3 : _BSS            DWORD PUBLIC  USE32 Class 'BSS'    Length: 0004
000157 SEGDEF 4 : _TLS            DWORD PUBLIC  USE32 Class 'TLS'    Length: 0000
000161 SEGDEF 5 : _INIT_          WORD  PUBLIC  USE32 Class 'INITDATA'   Length: 0006
00016B SEGDEF 6 : _EXIT_          WORD  PUBLIC  USE32 Class 'EXITDATA'   Length: 0006
000175 GRPDEF Group: DGROUP
    Segment: _DATA         
    Segment: _BSS          
00017E COMDEF
    Name:  1: 'Driver::_16385'      virtual(_TEXT) Length: 0058 bytes
000194 COMDEF
    Name:  2: '__stdcall _DriverEntry(TDriverObject *, TUnicodeString *)'  virtual(_TEXT) Length: 0088 bytes
0001D0 COMDEF
    Name:  3: '__fastcall Finalization()'  virtual(_TEXT) Length: 0007 bytes
0001EA COMDEF
    Name:  4: '__fastcall initialization()'  virtual(_TEXT) Length: 0008 bytes
000206 EXTDEF 5 : '_DbgPrint'           Type: 0 
000215 LEDATA  Segment: (16385) 'Driver::_16385'Offset: 0000  Length: 0058
    0000: 55 8B EC 8B 45 08 50 68  24 00 00 00 E8 00 00 00   U嬱.E.Ph$.......
    0010: 00 83 C4 08 68 48 00 00  00 E8 00 00 00 00 59 5D   .兡.hH........Y]
    0020: C2 04 00 00 44 72 69 76  65 72 55 6E 6C 6F 61 64   ....DriverUnload
    0030: 28 44 72 69 76 65 72 4F  62 6A 65 63 74 3A 30 78   (DriverObject:0x
    0040: 25 2E 38 58 29 00 00 00  44 72 69 76 65 72 55 6E   %.8X)...DriverUn
    0050: 6C 6F 61 64 28 2D 29 00                            load(-).
000275 FIXU32
    FixUp: 008  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[1]: Driver::_16385
    FixUp: 00d  Mode: Self Loc: Offset32    Frame: TARGET  Target: EI[5]: _DbgPrint
    FixUp: 015  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[1]: Driver::_16385
    FixUp: 01a  Mode: Self Loc: Offset32    Frame: TARGET  Target: EI[5]: _DbgPrint
00028B LEDATA  Segment: (16386) '__stdcall _DriverEntry(TDriverObject *, TUnicodeString *)'Offset: 0000  Length: 0088
    0000: 55 8B EC 53 8B 5D 08 8B  45 0C 50 53 68 38 00 00   U嬱S.]..E.PSh8..
    0010: 00 E8 00 00 00 00 83 C4  0C C7 43 34 00 00 00 00   ......兡..C4....
    0020: 33 DB 53 68 70 00 00 00  E8 00 00 00 00 83 C4 08   3.Shp........兡.
    0030: 8B C3 5B 5D C2 08 00 00  44 72 69 76 65 72 45 6E   嬅[]....DriverEn
    0040: 74 72 79 28 44 72 69 76  65 72 4F 62 6A 65 63 74   try(DriverObject
    0050: 3A 30 78 25 2E 38 58 3B  52 65 67 69 73 74 72 79   :0x%.8X;Registry
    0060: 50 61 74 68 3A 30 78 25  2E 38 58 29 00 00 00 00   Path:0x%.8X)....
    0070: 44 72 69 76 65 72 45 6E  74 72 79 28 2D 29 3A 30   DriverEntry(-):0
    0080: 78 25 2E 38 58 00 00 00                            x%.8X...
00031B FIXU32
    FixUp: 00d  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[2]: __stdcall _DriverEntry(TDriverObject *, TUnicodeString *)
    FixUp: 012  Mode: Self Loc: Offset32    Frame: TARGET  Target: EI[5]: _DbgPrint
    FixUp: 01c  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[1]: Driver::_16385
    FixUp: 024  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[2]: __stdcall _DriverEntry(TDriverObject *, TUnicodeString *)
    FixUp: 029  Mode: Self Loc: Offset32    Frame: TARGET  Target: EI[5]: _DbgPrint
000336 LEDATA  Segment: (16387) '__fastcall Finalization()'Offset: 0000  Length: 0007
    0000: FF 05 00 00 00 00 C3                               .......
000345 FIXU32
    FixUp: 002  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: SI[3]: _BSS
00034D LEDATA  Segment: (16388) '__fastcall initialization()'Offset: 0000  Length: 0008
    0000: 83 2D 00 00 00 00 01 C3                            .-......
00035D FIXU32
    FixUp: 002  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: SI[3]: _BSS
000365 LEDATA  Segment: (5) _INIT_         Offset: 0000  Length: 0006
    0000: 00 1E 00 00 00 00                                  ......
000372 FIXU32
    FixUp: 002  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[4]: __fastcall initialization()
00037B LEDATA  Segment: (6) _EXIT_         Offset: 0000  Length: 0006
    0000: 00 1E 00 00 00 00                                  ......
000388 FIXU32
    FixUp: 002  Mode: Seg  Loc: Offset32    Frame: TARGET  Target: VEI[3]: __fastcall Finalization()
000391 LIDATA
  Segment: _BSS           Offset: 0000
    Repeat     4. times,     1. Blocks
    Repeat     1. times,     1. Bytes
    0000: 00                                                 .
0003A2 MODE32

下面是经过rmcoff1.0转换后的COFF文件的dump信息：
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Microsoft (R) COFF Binary File Dumper Version 5.12.8078
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
 
 
Dump of file driver.obj
 
File Type: COFF OBJECT
 
FILE HEADER VALUES
             14C machine (i386)
               6 number of sections
        4B1C7573 time date stamp Mon Dec 07 11:24:35 2009
             25E file pointer to symbol table
              19 number of symbols
               0 size of optional header
             100 characteristics
                   32 bit word machine
 
SECTION HEADER #1
   .text name
       0 physical address
       0 virtual address
      E0 size of raw data
     104 file pointer to raw data
     1F0 file pointer to relocation table
       0 file pointer to line numbers
       9 number of relocations
       0 number of line numbers
60300020 flags
         Code
         4 byte align
         Execute Read
 
RAW DATA #1
  00000000: 55 8B EC 8B 45 08 50 68 24 00 00 00 E8 00 00 00  U...E.Ph$.......
  00000010: 00 83 C4 08 68 48 00 00 00 E8 00 00 00 00 59 5D  ....hH........Y]
  00000020: C2 04 00 00 44 72 69 76 65 72 55 6E 6C 6F 61 64  ....DriverUnload
  00000030: 28 44 72 69 76 65 72 4F 62 6A 65 63 74 3A 30 78  (DriverObject:0x
  00000040: 25 2E 38 58 29 00 00 00 44 72 69 76 65 72 55 6E  %.8X)...DriverUn
  00000050: 6C 6F 61 64 28 2D 29 00 55 8B EC 53 8B 5D 08 8B  load(-).U..S.]..
  00000060: 45 0C 50 53 68 90 00 00 00 E8 00 00 00 00 83 C4  E.PSh...........
  00000070: 0C C7 43 34 00 00 00 00 33 DB 53 68 C8 00 00 00  ..C4....3.Sh....
  00000080: E8 00 00 00 00 83 C4 08 8B C3 5B 5D C2 08 00 00  ..........[]....
  00000090: 44 72 69 76 65 72 45 6E 74 72 79 28 44 72 69 76  DriverEntry(Driv
  000000A0: 65 72 4F 62 6A 65 63 74 3A 30 78 25 2E 38 58 3B  erObject:0x%.8X;
  000000B0: 52 65 67 69 73 74 72 79 50 61 74 68 3A 30 78 25  RegistryPath:0x%
  000000C0: 2E 38 58 29 00 00 00 00 44 72 69 76 65 72 45 6E  .8X)....DriverEn
  000000D0: 74 72 79 28 2D 29 3A 30 78 25 2E 38 58 00 00 00  try(-):0x%.8X...
 
RELOCATIONS #1
                                                Symbol    Symbol
 Offset    Type              Applied To         Index     Name
 --------  ----------------  -----------------  --------  ------
 0000001A  REL32                      00000000        18  _DbgPrint
 00000015  DIR32                      00000048         3  .text
 0000000D  REL32                      00000000        18  _DbgPrint
 00000008  DIR32                      00000024         3  .text
 00000081  REL32                      00000000        18  _DbgPrint
 0000007C  DIR32                      000000C8         3  .text
 00000074  DIR32                      00000000         3  .text
 0000006A  REL32                      00000000        18  _DbgPrint
 00000065  DIR32                      00000090         3  .text
 
SECTION HEADER #2
   .data name
       0 physical address
       0 virtual address
       0 size of raw data
       0 file pointer to raw data
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0300040 flags
         Initialized Data
         4 byte align
         Read Write
 
SECTION HEADER #3
    .bss name
       0 physical address
       0 virtual address
       4 size of raw data
       0 file pointer to raw data
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0300080 flags
         Uninitialized Data
         4 byte align
         Read Write
 
SECTION HEADER #4
    _TLS name
       0 physical address
       0 virtual address
       0 size of raw data
       0 file pointer to raw data
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0300040 flags
         Initialized Data
         4 byte align
         Read Write
 
SECTION HEADER #5
  _INIT_ name
       0 physical address
       0 virtual address
       6 size of raw data
     1E4 file pointer to raw data
     24A file pointer to relocation table
       0 file pointer to line numbers
       1 number of relocations
       0 number of line numbers
C0200040 flags
         Initialized Data
         2 byte align
         Read Write
 
RAW DATA #5
  00000000: 00 1E E7 00 00 00                                ......
 
RELOCATIONS #5
                                                Symbol    Symbol
 Offset    Type              Applied To         Index     Name
 --------  ----------------  -----------------  --------  ------
 00000002  DIR32                      000000E7         3  .text
 
SECTION HEADER #6
  _EXIT_ name
       0 physical address
       0 virtual address
       6 size of raw data
     1EA file pointer to raw data
     254 file pointer to relocation table
       0 file pointer to line numbers
       1 number of relocations
       0 number of line numbers
C0200040 flags
         Initialized Data
         2 byte align
         Read Write
 
RAW DATA #6
  00000000: 00 1E E0 00 00 00                                ......
 
RELOCATIONS #6
                                                Symbol    Symbol
 Offset    Type              Applied To         Index     Name
 --------  ----------------  -----------------  --------  ------
 00000002  DIR32                      000000E0         3  .text
 
COFF SYMBOL TABLE
000 001A23FA ABS    notype       Static       | @comp.id
001 00000001 DEBUG  notype       Filename     | .file
    driver.pas
003 00000000 SECT1  notype       Static       | .text
    Section length   EF, #relocs    B, #linenums    0, checksum        0
005 00000000 SECT2  notype       Static       | .data
    Section length    0, #relocs    0, #linenums    0, checksum        0
007 00000000 SECT3  notype       Static       | .bss
    Section length    4, #relocs    0, #linenums    0, checksum        0
009 00000000 SECT4  notype       Static       | _TLS
    tag index 00000000 size 00000000 lines 00000000 next function 00000000
00B 00000000 SECT5  notype       Static       | _INIT_
    Section length    6, #relocs    1, #linenums    0, checksum        0
00D 00000000 SECT6  notype       Static       | _EXIT_
    tag index 00000000 size 00000000 lines 00000000 next function 00000000
00F 00000000 SECT3  notype       Static       | DGROUP
010 00000000 UNDEF  notype       NoClass      | 
011 00000000 UNDEF  notype       NoClass      | 
012 00000058 SECT1  notype       External     | _DriverEntry
013 00000000 UNDEF  notype       NoClass      | 
014 00000000 SECT1  notype       External     | Driver
015 00000000 UNDEF  notype       NoClass      | 
016 00000000 UNDEF  notype       NoClass      | 
017 00000000 UNDEF  notype       NoClass      | 
018 00000000 UNDEF  notype       External     | _DbgPrint
 
String Table Size = 0x1B bytes
 
  Summary
 
           4 .bss
           0 .data
          E0 .text
           6 _EXIT_
           6 _INIT_
           0 _TLS


下面是通过rmcoff2.0转换的COFF文件的dump结果：
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Microsoft (R) COFF Binary File Dumper Version 5.12.8078
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
 
 
Dump of file driver.obj
 
File Type: COFF OBJECT
 
FILE HEADER VALUES
             14C machine (i386)
               3 number of sections
        4B1C75B5 time date stamp Mon Dec 07 11:25:41 2009
             1C6 file pointer to symbol table
               4 number of symbols
               0 size of optional header
             100 characteristics
                   32 bit word machine
 
SECTION HEADER #1
   .text name
       0 physical address
       0 virtual address
      E0 size of raw data
      8C file pointer to raw data
     16C file pointer to relocation table
       0 file pointer to line numbers
       9 number of relocations
       0 number of line numbers
60300020 flags
         Code
         4 byte align
         Execute Read
 
RAW DATA #1
  00000000: 55 8B EC 8B 45 08 50 68 24 00 00 00 E8 00 00 00  U...E.Ph$.......
  00000010: 00 83 C4 08 68 48 00 00 00 E8 00 00 00 00 59 5D  ....hH........Y]
  00000020: C2 04 00 00 44 72 69 76 65 72 55 6E 6C 6F 61 64  ....DriverUnload
  00000030: 28 44 72 69 76 65 72 4F 62 6A 65 63 74 3A 30 78  (DriverObject:0x
  00000040: 25 2E 38 58 29 00 00 00 44 72 69 76 65 72 55 6E  %.8X)...DriverUn
  00000050: 6C 6F 61 64 28 2D 29 00 55 8B EC 53 8B 5D 08 8B  load(-).U..S.]..
  00000060: 45 0C 50 53 68 38 00 00 00 E8 00 00 00 00 83 C4  E.PSh8..........
  00000070: 0C C7 43 34 00 00 00 00 33 DB 53 68 70 00 00 00  ..C4....3.Shp...
  00000080: E8 00 00 00 00 83 C4 08 8B C3 5B 5D C2 08 00 00  ..........[]....
  00000090: 44 72 69 76 65 72 45 6E 74 72 79 28 44 72 69 76  DriverEntry(Driv
  000000A0: 65 72 4F 62 6A 65 63 74 3A 30 78 25 2E 38 58 3B  erObject:0x%.8X;
  000000B0: 52 65 67 69 73 74 72 79 50 61 74 68 3A 30 78 25  RegistryPath:0x%
  000000C0: 2E 38 58 29 00 00 00 00 44 72 69 76 65 72 45 6E  .8X)....DriverEn
  000000D0: 74 72 79 28 2D 29 3A 30 78 25 2E 38 58 00 00 00  try(-):0x%.8X...
 
RELOCATIONS #1
                                                Symbol    Symbol
 Offset    Type              Applied To         Index     Name
 --------  ----------------  -----------------  --------  ------
 00000008  DIR32                      00000024         0  Driver::_16385
 0000000D  REL32                      00000000         2  _DbgPrint
 00000015  DIR32                      00000048         0  Driver::_16385
 0000001A  REL32                      00000000         2  _DbgPrint
 00000065  DIR32                      00000038         1  _DriverEntry
 0000006A  REL32                      00000000         2  _DbgPrint
 00000074  DIR32                      00000000         0  Driver::_16385
 0000007C  DIR32                      00000070         1  _DriverEntry
 00000081  REL32                      00000000         2  _DbgPrint
 
SECTION HEADER #2
   .data name
       0 physical address
       0 virtual address
       0 size of raw data
     16C file pointer to raw data
     1C6 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0300040 flags
         Initialized Data
         4 byte align
         Read Write
 
SECTION HEADER #3
    .bss name
       0 physical address
       0 virtual address
       4 size of raw data
       0 file pointer to raw data
       0 file pointer to relocation table
       0 file pointer to line numbers
       0 number of relocations
       0 number of line numbers
C0300080 flags
         Uninitialized Data
         4 byte align
         Read Write
 
COFF SYMBOL TABLE
000 00000000 SECT1  notype       External     | Driver::_16385
001 00000058 SECT1  notype       External     | _DriverEntry
002 00000000 UNDEF  notype       External     | _DbgPrint
003 00000000 SECT3  notype       Static       | .bss
 
String Table Size = 0x2A bytes
 
  Summary
 
           4 .bss
           0 .data
          E0 .text


对比一下就可以发现，rmcoff2.0转换的COFF目标文件更接近原来的OMF格式文件，文件中的符号表等信息也更准确。默认时Delphi生成的目标文件有6个段，TEXT、DATA、BSS、_TLS、_INIT_、_EXIT_，并会为每个单元加入Finalization和initialization两个函数用于单元的初始化和退出前的资源释放等工作，而_TLS、_INIT_、_EXIT_这三个段和Finalization、initialization这两个函数在驱动中是没有用的，因此转换后，rmcoff2会把它们删除，这样生成的驱动文件就会更小。
最后感谢广大Delphi fans对我的支持和鼓励。

[注意]看雪招聘，专注安全领域的专业人才平台！

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xicao
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对于楼主的贡献，只能膜拜了
2009-12-9 17:16
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SIsIa
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支持楼主，那个图形界面的转换器在哪里下载呀？
2009-12-14 18:23
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