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·¢ÐÅÕ¾: ¹þ¹¤´ó×϶¡Ïã (Wed Nov  8 22:16:19 2006), Õ¾ÄÚ

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Copyright (c) 2006  Dancefire (dancefire#gmail).
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts,
no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
 
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c043e9e8 <freebsd4_sigcode>:                        | c04431d8 <freebsd4_sigcode>: 
freebsd4_sigcode():                                 freebsd4_sigcode():
c043e9e8: call   *0x10(%esp)                       | c04431d8: call   *0x10(%esp)
c043e9ec: lea    0x14(%esp),%eax                   | c04431dc: lea    0x14(%esp),%eax
c043e9f0: push   %eax                              | c04431e0: push   %eax
c043e9f1: testl $0x20000,0x54(%eax)               | c04431e1: testl $0x20000,0x54(%eax)
c043e9f8: jne    c043e9fd <freebsd4_sigcode+0x15> | c04431e8: jne    c04431ed <freebsd4_sigcode+0x15>
c043e9fa: movl   0x14(%eax),%gs                    | c04431ea: movw   0x14(%eax),%gs
c043e9fd: mov    $0x158,%eax                       | c04431ed: mov    $0x158,%eax
c043ea02: push   %eax                              | c04431f2: push   %eax
c043ea03: int    $0x80                             | c04431f3: int    $0x80
c043ea05: jmp    c043ea05 <freebsd4_sigcode+0x1d> | c04431f5: jmp    c04431f5 <freebsd4_sigcode+0x1d>
c043ea07: nop                                      | c04431f7: nop 

 
  
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freebsd4_sigcode():                        | freebsd4_sigcode():
 call   *{Offset}(%esp)                   |   call   *{Offset}(%esp)
 lea    {Offset}(%esp),%eax               |   lea    {Offset}(%esp),%eax
 push   %eax                              |   push   %eax
 testl {Number},{Offset}(%eax)           |   testl {Number},{Offset}(%eax)
 jne    <freebsd4_sigcode+{Offset}>       |   jne    <freebsd4_sigcode+{Offset}>
 movl   {Offset}(%eax),%gs                |   movw   {Offset}(%eax),%gs
 mov    {Number},%eax                     |   mov    {Number},%eax
 push   %eax                              |  push   %eax
 int    {Number}                          |   int    {Number}
 jmp    <freebsd4_sigcode+{Offset}>       |   jmp    <freebsd4_sigcode+{Offset}>
 nop                                      |   nop 

 
  
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2.1.3 ´úÂë¶Î˳Ðòµ÷Õû
 
¾­¹ýÉÏÃæµÄÔëÒô¹ýÂ˺󣬴úÂëÒѾ­Äܹ»ÔÚ»ù±¾²»Ó°Ïì´úÂëÂß¼­µÄÇ°ÌáÏÂÈ¥³ýÁËÔëÒôµÄÓ°Ïì¡£¿ÉÊÇ£¬»¹ÓÐÒ»ÖÖÇé¿ö»á¶ÔÆ¥Åä½á¹û´øÀ´½Ï´óµÄÓ°Ïì¡£¾ÍÊÇ´úÂë¿éλÖõÄÇ°ºó±ä¶¯£¬ÎÒÃÇÀ´¿´ÏÂÃæÕâÁ½¶Î´úÂëµÄ±È¶Ô¡£


begin():                                   <
        mov    {Address},%eax              <
        lea    {Offset}(%eax),%esp         <
        xor    %ebp,%ebp                   <
        mov    {Address},%esi              <
        mov    %esi,{Offset}(%eax)         <
        pushl {Address}                   <
        call   <init386>                   <
        add    {Number},%esp               <
        call   <mi_startup>                <
        add    {Number},%esp               <
sigcode():                                   sigcode():
        call   *{Offset}(%esp)                       call   *{Offset}(%esp)
        lea    {Offset}(%esp),%eax                   lea    {Offset}(%esp),%eax
        push   %eax                                  push   %eax
        testl {Number},{Offset}(%eax)               testl {Number},{Offset}(%eax)
        jne   <sigcode+{Offset}>                     jne   <sigcode+{Offset}>
        movl   {Offset}(%eax),%gs          |         movw   {Offset}(%eax),%gs
        mov    {Number},%eax                         mov    {Number},%eax
        push   %eax                                  push   %eax
        int    {Number}                              int    {Number}
        jmp   <sigcode+{Offset}>                     jmp   <sigcode+{Offset}>
        nop                                          nop    
                                           > begin():
                                           >         mov    {Address},%eax
                                           >         lea    {Offset}(%eax),%esp
                                           >         xor    %ebp,%ebp
                                           >         mov    {Address},%esi
                                           >         mov    %esi,{Offset}(%eax)
                                           >         pushl {Address}
                                           >         call   <init386>
                                           >         add    {Number},%esp
                                           >         call   <mi_startup>
                                           >         add    {Number},%esp



  
ºÍ¸Õ²ÅÒ»Ñù¡£×ó±ßÀ´×ÔFreeBSD 5.3µÄ´úÂ룬ÓÒ±ßÀ´×ÔKylin 2.0µÄ´úÂë(µ«ÊÇΪÁ˾ÙÀý£¬º¯ÊýÇ°ºó˳ÐòÉÔ×÷µ÷Õû)¡£ÔÚÁ½¶Î´úÂëʵ¼ÊÉϷdz£ÏàËÆ£¬µ«ÊÇÓÉÓÚ´úÂëÇ°ºóµÄ˳Ðò²»Í¬£¬µ¼ÖÂÖ»ÓÐÒ»¸ö´úÂë¿ésigcode()¿ÉÒÔÆ¥ÅäµÄÉÏ£¬ÏàËƶȽöΪ47.6%¡£
Õë¶ÔÕâÀàÇé¿ö£¬ÎҵĽâ¾ö°ì·¨Êǽ«´úÂë¿é°´ÕÕ±êºÅ/º¯ÊýÃû½øÐÐÅÅÐò¡£¾­¹ýÅÅÐò£¬ÉÏÊö´úÂë¶Î±È¶Ô½«±äΪ£º

begin():                                   begin(): 
        mov    {Address},%eax                      mov    {Address},%eax
        lea    {Offset}(%eax),%esp                 lea    {Offset}(%eax),%esp
        xor    %ebp,%ebp                           xor    %ebp,%ebp
        mov    {Address},%esi                      mov    {Address},%esi
        mov    %esi,{Offset}(%eax)                 mov    %esi,{Offset}(%eax)
        pushl {Address}                           pushl {Address}
        call   <init386>                           call   <init386>
        add    {Number},%esp                       add    {Number},%esp
        call   <mi_startup>                        call   <mi_startup>
        add    {Number},%esp                       add    {Number},%esp
sigcode():                                 sigcode():
        call   *{Offset}(%esp)                     call   *{Offset}(%esp)
        lea    {Offset}(%esp),%eax                 lea    {Offset}(%esp),%eax
        push   %eax                                push   %eax
        testl {Number},{Offset}(%eax)             testl {Number},{Offset}(%eax)
        jne   <sigcode+{Offset}>                   jne   <sigcode+{Offset}>
        movl   {Offset}(%eax),%gs        |         movw   {Offset}(%eax),%gs
        mov    {Number},%eax                       mov    {Number},%eax
        push   %eax                                push   %eax
        int    {Number}                            int    {Number}
        jmp   <sigcode+{Offset}>                   jmp   <sigcode+{Offset}>
        nop                                        nop    
 
  
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Ö´ÐÐÌåÖÐÏûʧ£¬´Ó¶øµ¼ÖÂÅÅÐòʧ°Ü¡£ÁíÍ⣬²»ÊÇËùÓеĿÉÖ´ÐÐÌ嶼»á±£Áôº¯ÊýÃû£¬¶ÔÓÚWindowsµÄPEÎļþÀ´Ëµ£¬Èç¹û²»ÓÃdebugģʽ±àÒëµÄ»°£¬³ýÁ˵¼³öº¯ÊýÍ⣬ÆäËûµÄº¯ÊýÃûÒ»°ã²»»á±£´æÔÚÖ´ÐÐÎļþÖУ¬
ÔÚÎÒÓÃͬÑùµÄ·½·¨·ÖÎöWindowsÎļþÄں˵Äʱºò³öÏÖÁ˱ȽÏÑÏÖصÄÎÊÌ⣬¼´Ê¹ÑªÇ×¹ØϵºÜ½üµÄÁ½¸ö°æ±¾µÄWindowsÄںˣ¬ÎÞÂÛÅÅÐò»òÕß²»ÅÅÐò£¬ÏàËƶȶ¼·Ç³£µÄµÍ£¬¶ÔÓÚÕâÀàPEÎļþ¸ù±¾ÎÞ·¨·´Ó³³öÏàËƶȡ£ËùÒÔ£¬ÔÚ×îÖյķÖÎöÖУ¬ÎÒÌÞ³öÁËÔ­±¾ÁÐÔڱȽÏÄ¿±êÖеÄXPÄںˡ£
ÒòΪELFµÄÕâ¸öÌص㣬Õâ´ÎÎҵķÖÎö½«Ö»¶ÔʹÓÃELFµÄÎļþ¸ñʽµÄÄں˽øÐзÖÎö¡£
 
2.1.4 ±È½Ï
 
ÔÚÔ­±¾µÄ¼Æ»®ÖУ¬ÎÒÔø¿¼ÂDzÉÓó£ÓÃÓÚ×Ö·û´®ÏàËƶȱȽϵı༭¾àÀë(Levenshtein Distance)Ëã·¨[5]¡£Õâ¸öËã·¨µÄº¬Ò壬ÊǼÆËãÁ½×Ö·û´®Ö®¼äµÄ¾àÀëÓжàÔ¶¡£±à¼­¾àÀëÊÇÖ¸£¬´ÓÔ­×Ö·û´®±ä»¯µ½Ä¿µÄ×Ö·û´®×îÉÙÐèÒª½øÐжàÉٴΰüÀ¨Ìí¼Ó¡¢Ð޸ġ¢É¾³ýÔÚÄڵIJÙ×÷¡£¾ÙÀý¶øÑÔ£º
Èç¹û¼ÆËãkittenºÍsittingÖ®¼äµÄ±à¼­¾àÀ룬ÎÒÃÇ×îÉÙÐèÒª½øÐÐ3´Î²Ù×÷£¬
1¡¢  kitten -> sitten (ÐÞ¸Äs->k)
2¡¢  sitten -> sittin (ÐÞ¸Äi->e)
3¡¢  sittin -> sitting (Ôö¼Ó g)
Òò´Ë£¬kittenºÍsittingÖ®¼äµÄ±à¼­¾àÀëÊÇ3¡£Õâ¸öËã·¨ÊǶí¹úµÄ¿Æѧ¼ÒVladimir LevenshteinÔÚ1965ÄêÌá³öµÄ¡£Õâ¸öËã·¨Ö÷ÒªÊÇÓ¦ÓÃÔÚDNA·ÖÎö¡¢Æ´×Ö¼ì²é¡¢ÓïÒô±æʶºÍ³­Ï®Õì²âÉÏ¡£[6]
µ«ÊÇÕâ¸öËã·¨µÄ¼ÆË㸴ÔÓ¶ÈÌ«¸ß£¬ÊÇO(nm)µÄ¸´ÔӶȡ£¶ÔÓÚƽ¾ù´óСÔÚ100ÍòÐеIJÙ×÷ϵͳÄÚºËÔ´´úÂëÀ´Ëµ£¬¾ÍÊÇÍòÒڴ춱ðµÄ±È¶Ô¡£¶ÔÓÚÆÕͨµÄ¼ÆËã»ú£¬Æ½¾ùÿÁ½¸öÄں˵ıȶԾÍÒª»¨È¥ÊýСʱ¡£¶ø´Ë´Î²ÎÓë±È¶ÔµÄÄں˽«ÓÐ20¸ö×óÓÒ£¬Íê³ÉÒ»¸ö±È½ÏÍêÕûµÄ±È¶Ô¹ý³Ì½«»á³öÏÖ¼¸°Ù´Î±È¶Ô£¬
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ͨ¹ýdiff¸ø³öµÄ½á¹û¿ÉÒÔµÃÖªµÚÒ»¸öÎļþÔö¸Ä¶àÉÙÐдúÂëºó£¬¾Í¿ÉÒÔ±äΪµÚ¶þ¸öÎļþ¡£diffµÄËã·¨ºÍÆäʵ¶ÔÓÚÐÞ¸ÄÎÒÃDz¢²»½éÒ⣬ÎÒÃÇÖ»¹ØÐÄÔö¼Ó¶àÉÙÐдúÂë¾Í¿ÉÒÔ±äΪµÚ¶þ¸öÎļþ¡£
¼ÙÉèÄÚºËAµÄ´úÂëÓÐaÐУ¬ÄÚºËBµÄ´úÂëÓÐbÐС£¶ø´ÓÄÚºËA±ä»¯µ½ÄÚºËBÐèÒªÌí¼ÓcÐУ¬ÓÉÄÚºËB±ä»¯µ½ÄÚºËAÐèÒªdÐС£ÓÉ´Ë£¬ÎÒÃÇ¿ÉÒÔµÃÖª£¬ÔÚÄÚºËAÖУ¬´æÔÚÓÐb-cÐдúÂëºÍÄÚºËBÊÇÏàͬµÄ¡£Òò´Ë£¬ÎÒÃǽ«ÄÚºËAÖÐËù´æÔÚµÄÄÚºËBµÄ´úÂëÐÐÊý³ýÒÔÄÚºËA×ÔÉíµÄ´úÂëÐÐÊý¶¨ÒåΪÁ½¸öÄں˵ÄÏàËƶÈ
 
A->BµÄÏàËƶȠ= (b-c) / a 

Óɹ«Ê½¿ÉÖª£¬A->BºÍB->AµÄ¼ÆËã½á¹û½«ÓпÉÄܲ»Í¬¡£ÒòΪÎÒÃÇÅжÏÏàËƶȵÄÔ­Òò²»µ¥´¿ÊÇ¿´¶þÕߵIJîÒ죬¸üÖØÒªµÄÊÇ¿´ËûÃÇÖ®¼äµÄѪÇ×¹ØϵµÄÔ¶½ü£¬Òò´ËÎÒÃÇÈ¡Ë«Ïòת»»ÖеÄ×î´óÖµ£¬×÷ΪA<->BÖ®¼äµÄÏàËƶȡ£
 
A-B¼äµÄÏàËƶȠ= max( (b-c) / a, (a-d) / b ) 

2.1.5 Ð¡½á
 
·ÖÎö·½·¨»¹ÓдýÍêÉÆ£¬¿ÉÒÔ¿´³ö£¬¶þ½øÖÆ¿ÉÖ´ÐÐÎļþµÄ·ÖÎöÒÀ¾É»¹ÓкܴóµÄÄѶȣ¬ºÜÈÝÒ×Êܵ½¸÷ÖÖÍâΧ»·¾³µÄ±ä»¯¶øµ¼ÖÂÏàËƶȴó·ùϽµ£¬¶øÎÞ·¨·´Ó³ÕæʵµÄÏàËƶȡ£Òò´Ë¶ÔÓÚÄÇЩ¿ÌÒâÒþÂ÷Ïà¹ØÐԵĶþ½øÖÆ¿ÉÖ´ÐÐÎļþÀ´Ëµ»¹ÊDZȽÏÈÝÒ×µÄÌÓ¹ýÕâÖÖ·ÖÎö·½·¨µÄ¼ì²â¡£
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2.2 ¶àÖÖ²Ù×÷ϵͳÄÚºËÏàËƶȱȽÏ
 
ΪÁ˱ȶԾ¡Á¿¿Í¹Û£¬Õâ´Î²Î¼Ó±È¶ÔµÄ²Ù×÷ϵͳÄں˰üÀ¨£¬FreeBSD, NetBSD, OpenBSD, Linux, SolarisºÍÒøºÓ÷è÷ë²Ù×÷ϵͳ£¬¹²6¸ö²Ù×÷ϵͳ£¬22¸öÄںˡ£
Ô­¼Æ»®ÖУ¬Òª½«Mac OS XÖеÄDarwin 8.0.1, 7.0.1ÄÃÀ´±È¶Ô£¬¿ÉÊÇÓÉÓÚÆäÎļþ¸ñʽÊÇMach-OµÄ£¬¶øÎÒÓÖûÓÐÖ§³ÖMach-OµÄobjdump£¬ËùÒÔÔÝʱÎÞ·¨²ÎÓë±È¶Ô¡£ÁíÍ⣬ԭ¼Æ»®Ôø´òËãÄÃÏà¹ØÐÔ¸ü²îµÄWindows NTϵÁеÄϵͳÄÚºËÀ´½øÐбȶԣ¬¿ÉÊÇÓÉÓÚ֮ǰËù˵µÄPE¸ñʽÎÊÌâ¶øµ¼ÖµÄÏàËƶÈû
¼¼ÛÖµ£¬ËùÒÔ£¬Õâ´ÎҲûÓн«ÆäÁÐÈë×îÖյıȶԡ£
ΪÁËÈ·ÈϱȶԵÄÓÐЧÐÔ£¬ÎÒÃǽ«ÏȶÔFreeBSD, NetBSDºÍOpenBSDÖ®¼äµÄ±È¶ÔÀ´ÉóÊÓÆä±È¶ÔЧ¹û¡£
 
2.2.1 FreeBSD¼ä²»Í¬°æ±¾ÄÚºËÏàËƶȷÖÎö
 
FreeBSDÊÇÒ»ÖÖUnixÑÜÉú²Ù×÷ϵͳ£¬ÓÉBSD, 386BSDºÍ4.4BSD·¢Õ¹¶øÀ´µÄUnixµÄÒ»¸öÖØÒª·ÖÖ§¡£¶øBSDµÄÈ«³ÆÊÇ¡°²®¿ËÀûÈí¼þ·¢²¼¡±£¬ÊÇÃÀ¹ú²®¿ËÀû´óѧ¼ÆËã»úϵͳÑо¿×éËùÖÆ×÷µÄÒ»Ì×°üÀ¨ÄÚºËÔÚÄÚÍêÕûµÄ²Ù×÷ϵͳ£¬ÆðÔ´ÓÚAT&TµÄUnix V6£¬µ«ÊǺóÀ´ÓÉÓÚÓëAT&TµÄ°æȨ¾À·×ÎÊÌ⣬³¹µ×µÄɾ
T&TÔÚBSDÄÚºËÖеĴúÂ룬´óÔ¼Õ¼10%×óÓÒ¡£Ò²ÕýÊÇÕⳡ¹Ù˾£¬¶ø¸øÁËLinuxµÃÒÔ·ÉËÙ·¢Õ¹µÄ»úÓö¡£ÔÚ°æȨÎÊÌâ½â¾öºó£¬BSD½èÖúÆä¸ßÖÊÁ¿µÄ´úÂ룬ÔÚ¿ª·ÅÔ´´úÂëµÄÊÀ½çÀïÓÐÁË·ÉËٵķ¢Õ¹£¬·Ö±ð²úÉúÁË3¸öÖØÒªµÄ·ÖÖ§£¬FreeBSD, OpenBSD, NetBSD¡£FreeBSD·¢Õ¹ÖÁ½ñ£¬ÒѾ­³ÉΪ¹«ÈϵÄÏ൱¿É¿
׳µÄ²Ù×÷ϵͳ¡£[9,10]
ÒòΪ½¹µã¼¯ÖÐÔÚFreeBSDÉíÉÏ£¬¶øÇÒÌرðÊÇ5.xºÍ6.xµÄϵͳÉÏ£¬Òò´ËÕâ»Ø²ÎÓë±È½ÏµÄFreeBSDµÄÄں˰汾½Ï¶à£¬·Ö±ðÓÐFreeBSD 5.0, 5.1, 5.2, 5.2.1, 5.3, 5.4, 5.5 beta 4ºÍ6.0¡£
 
ԭʼÄÚºË\Ä¿±êÄںˠ»ã±àÐÐÊý freebsd_5.0 freebsd_5.1 freebsd_5.2 freebsd_5.2.1 freebsd_5.3 freebsd_5.4 freebsd_5.5.b4 freebsd_6.0 
freebsd_5.0 913,353 - 697423 712361 714811 969174 1001579 1016967 1146371 
freebsd_5.1 958,699 652223 - 682433 681769 1029692 1002484 1034263 1112613 
freebsd_5.2 1,048,418 572280 604662 - 3252 817759 865407 850969 1124929 
freebsd_5.2.1 1,049,592 493098 607199 2078 - 816434 870479 881654 1124304 
freebsd_5.3 1,161,593 742327 762747 705826 724190 - 35581 78219 977778 
freebsd_5.4 1,174,287 744511 811979 732332 733290 22906 - 25985 901307 
freebsd_5.5.b4 1,187,447 741616 783626 735617 734211 40295 12975 - 358820 
freebsd_6.0 1,271,723 791490 805184 905427 907359 753022 766311 622653 - 

 
ÉϱíÖÐËùÁгöµÄÊÇFreeBSDµÄ¸÷¸ö°æ±¾Ö®¼äµÄ²îÒìÐÐÊý£¬¼´Ç°ÃæËù˵µ½µÄc¡£×ó±ßÁгöµÄÊÇԭʼÄںˣ¬¶¥¶ËÁгöµÄÊÇÄ¿µÄÄںˡ£×ó±ß¸ø³öÁËԭʼÄں˵ÄÐÐÊý¡£
²îÒìÐÐÊýºÍÏàËƶȾßÓÐÏàͬµÄº¬Ò壬±Ï¾¹ÏàËƶÈÒ²ÊÇͨ¹ý²îÒìÐÐÊý¼ÆËã³öÀ´µÄ£¬Òò´ËÔÚÒÔºóµÄÐðÊöÖУ¬ÎÒÃǽ«Ö»ÁгöÏàËƶȶԱȵıí¸ñ¡£
ÏÂÃæ¾ÍÊÇFreeBSD¸÷¸ö°æ±¾Ö®¼äµÄÄÚºËÏàËƶȱȽϡ£
 
ԭʼÄÚºË\Ä¿µÄÄںˠ»ã±àÐÐÊý freebsd_5.0 freebsd_5.1 freebsd_5.2 freebsd_5.2.1 freebsd_5.3 freebsd_5.4 freebsd_5.5.b4 freebsd_6.0 
freebsd_5.0 913,353 - 28.61% 36.79% 36.65% 21.07% 18.91% 18.67% 13.72% 
freebsd_5.1 958,699 27.24% - 38.18% 38.37% 13.76% 17.92% 15.98% 16.60% 
freebsd_5.2 1,048,418 32.53% 33.77% - 99.80% 32.80% 29.46% 32.09% 14.00% 
freebsd_5.2.1 1,049,592 40.04% 33.49% 99.69% - 32.89% 28.95% 29.13% 14.05% 
freebsd_5.3 1,161,593 14.72% 16.87% 29.49% 28.01% - 98.03% 95.49% 25.31% 
freebsd_5.4 1,174,287 14.38% 12.49% 26.92% 26.94% 96.97% - 98.91% 31.54% 
freebsd_5.5.b4 1,187,447 14.46% 14.74% 26.34% 26.56% 94.43% 97.80% - 76.88% 
freebsd_6.0 1,271,723 9.58% 12.07% 11.24% 11.18% 32.13% 32.08% 44.41% - 

 
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freebsd_5.3 1,161,593  - 25.31% 16.55% 16.61% 16.78% 16.74% 
freebsd_6.0 1,271,723  32.13% - 16.65% 16.22% 15.89% 16.24% 
netbsd_2.1 1,503,585  13.08% 13.68% - 53.35% 17.53% 16.72% 
netbsd_3.0 1,616,659  11.76% 12.65% 24.40% - 13.96% 14.61% 
openbsd_3.7 1,228,137  15.60% 16.54% 20.77% 18.44% - 88.89% 
openbsd_3.8 1,260,707  15.26% 16.52% 20.65% 18.47% 84.56% - 

 
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freebsd_5.0 913,353 - 36.79% 13.72% 40.53% 30.43% 30.43% 40.53% 6.46% 11.24% 11.37% 10.91% 10.87% 5.02% 
freebsd_5.2 1,048,418 32.53% - 14.00% 48.18% 34.02% 34.02% 48.18% 5.75% 11.02% 10.91% 10.95% 10.94% 4.55% 
freebsd_6.0 1,271,723 9.58% 11.24% - 12.63% 13.19% 13.14% 12.63% 6.61% 16.65% 16.22% 15.89% 16.24% 5.21% 
kylin_2.0.0 1,120,079 31.92% 41.94% 14.55% - 91.06% 91.06% 100.00% 5.38% 10.83% 10.31% 10.20% 10.35% 4.35% 
kylin_2.0.14 1,190,443 23.55% 29.98% 24.61% 85.60% - 100.00% 85.60% 5.04% 10.63% 10.64% 10.30% 10.44% 4.06% 
kylin_2.0.21 1,190,562 23.52% 29.95% 21.04% 85.57% 99.99% - 85.57% 5.03% 10.72% 10.63% 10.29% 10.44% 4.06% 
kylin_2.0.21_lsb 1,120,079 31.92% 41.94% 14.55% 100.00% 91.06% 91.06% - 5.38% 10.83% 10.31% 10.20% 10.35% 4.35% 
linux_2.6.16 666,204 9.47% 9.71% 13.13% 5.38% 5.38% 5.39% 5.38% - 11.89% 12.09% 12.21% 12.07% 6.30% 
netbsd_2.1 1,503,585 6.49% 7.42% 13.68% 8.06% 8.18% 7.97% 8.06% 5.20% - 53.35% 17.53% 16.72% 4.10% 
netbsd_3.0 1,616,659 6.19% 7.11% 12.65% 7.54% 7.90% 7.89% 7.54% 4.98% 24.40% - 13.96% 14.61% 3.73% 
openbsd_3.7 1,228,137 7.95% 9.58% 16.54% 9.27% 9.97% 9.71% 9.27% 6.43% 20.77% 18.44% - 88.89% 5.20% 
openbsd_3.8 1,260,707 7.72% 8.84% 16.52% 8.88% 9.53% 9.52% 8.88% 6.29% 20.65% 18.47% 84.56% - 5.00% 
OpenSolaris_5.11 396,534 11.87% 12.00% 16.84% 12.50% 12.46% 12.46% 12.50% 13.37% 15.90% 15.82% 16.66% 16.49% - 

 
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kylin_2.0.14 1,190,443  101,029   -  145  101,029  
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freebsd_5.0 913,353 - 28.61% 36.79% 36.65% 21.07% 18.91% 18.67% 40.53% 30.43% 
freebsd_5.1 958,699 27.24% - 38.18% 38.37% 13.76% 17.92% 15.98% 28.94% 26.11% 
freebsd_5.2 1,048,418 32.53% 33.77% - 99.80% 32.80% 29.46% 32.09% 48.18% 34.02% 
freebsd_5.2.1 1,049,592 40.04% 33.49% 99.69% - 32.89% 28.95% 29.13% 48.15% 34.47% 
freebsd_5.3 1,161,593 14.72% 16.87% 29.49% 28.01% - 98.03% 95.49% 57.94% 50.48% 
freebsd_5.4 1,174,287 14.38% 12.49% 26.92% 26.94% 96.97% - 98.91% 56.24% 51.88% 
freebsd_5.5.b4 1,187,447 14.46% 14.74% 26.34% 26.56% 94.43% 97.80% - 39.47% 50.16% 
kylin_2.0.0 1,120,079 31.92% 20.99% 41.94% 41.97% 60.26% 59.04% 42.59% - 91.06% 
kylin_2.0.21 1,190,562 23.52% 16.68% 29.95% 29.93% 52.04% 50.87% 50.35% 85.57% - 

 
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¸½Â¼A    ½øÒ»²½·ÖÎö
 
Èç¹ûÏë½øÒ»²½µÄ·ÖÎö÷è÷ëÓëÆäËû²Ù×÷ϵͳµÄÏàËÆÐÔ£¬Ò²¿ÉÒÔ´Óobjdumpµ¼³öµÄº¯ÊýÃû³ÆµÄÏàËƶÈÀ´±È½Ï¡£ÎÒÔø¾­·ÖÎö¹ýFreeBSD 5.3Äں˺Í÷è÷ëÄÚºËobjdump³öµÄº¯ÊýÃûµÄ²îÒì¡£FreeBSD 5.3ÓÐ14101¸öº¯Êý£¬Kylin 2.0ÓÐ14399¸öº¯Êý£¬ÆäÖÐÓÐ4¸öº¯Êý³öÏÖÔÚÁËFreeBSD 5.3¶øûÓгöÏÖÔÚKyl
0ÖУ»ÓÐ302¸öº¯Êý³öÏÖÔÚÁËKylin 2.0 objdumpµÄÎļþÀ¶øûÓгöÏÖÔÚFreeBSD 5.3µÄobjdumpÎļþÀï¡£¾­¹ý·ÖÎö£¬Õâ302¸öº¯ÊýÖÐÓÐ223¶¼¿ÉÒÔÔÚFreeBSD 5.3µÄÔ´´úÂëÀïÕÒµ½£¬Ã»Óб»objdump³öÀ´ÓпÉÄÜÊÇÒòΪ±àÒë»·¾³²»Í¬¡£»¹Ê£ÏÂ79¸öº¯Êý¿ÉÄÜÊÇ÷è÷ëÐÂÔöµÄº¯Êý£¬ËûÃÇÊÇ£º
  
+ acd_describe_proc():
+ ad_print_proc():
+ ata_info():
+ ata_proc_print():
+ bus_usb_proc():
+ g_conftxt_class_proc():
+ g_conftxt_geom_proc():
+ g_conftxt_proc():
+ ifa_ifwithnet_packet():
+ kevent_epoll_ctl():
+ kevent_epoll_wait():
+ kqueue_scan_epoll():
+ linprocfs_doata0info():
+ linprocfs_doata1info():
+ linprocfs_donetarp():
+ linprocfs_donetroute():
+ linprocfs_dopartitions():
+ linprocfs_doprogress():
+ linprocfs_doscsi():
+ linprocfs_dousbdevices():
+ linprocfs_dousbhub():
+ linux_emul_convpath_orig():
+ linux_gifindex():
+ linux_ioctl_floppy():
+ linux_sifflags():
+ linux_to_bsd_sifhwaddr():
+ mdchange_vnode():
+ mpt_get_tgt_negotiated_params():
+ mpt_physdisk_status():
+ mpt_print_header():   [OpenBSD]
+ mpt_print_raid_config():
+ mpt_raid_vol_status():
+ mpt_read_cfg_page_with_alloc():
+ mpt_read_config_info_raid():   [OpenBSD]
+ mpt_set_tgt_params():
+ packet_abort():
+ packet_appenctl():
+ packet_attach():
+ packet_bind():
+ packet_connect():
+ packet_control():
+ packet_detach():
+ packet_dhd_input():
+ packet_disconnect():
+ packet_init():
+ packet_input():
+ packet_output():
+ packet_peeraddr():
+ packet_proto_input():
+ packet_send():
+ packet_shutdown():
+ packet_sockaddr():
+ ptmsclose():
+ ptmsopen():
+ ptmx_clone():
+ ptmxclose():
+ ptmxinit():
+ ptmxopen():
+ raid_get_physdisk_by_num():
+ read_raid_info():
+ resolve_raid_targets():
+ scsi_proc_inquiry():
+ shmperm():
+ splash_progress():
+ syscons_progress():
+ sysctl_kern_umass():
+ usb_bus_exist():
+ usbd_add_procinfo():
+ usbd_devinfo_sn():
+ usbd_remove_procinfo():
+ xpt_announce_proc():
+ xpt_find_umass():
+ xpt_proc_periph():
+ xptdaannouncefunc():
ÒÔ¼°

+ vfs_nmount():
+ mpt_read_config_info_ioc():
+ linux_epoll_create():
+ linux_epoll_ctl():
+ linux_epoll_wait():
 
Èç¹ûµ¥´Óº¯ÊýÃû±È¶ÔµÄͳ¼ÆÉÏ¿´µÄ»°£¬14399¸öº¯Êý£¬Ö»ÓÐ79¸öº¯Êý¿ÉÄÜÊÇÔ­´´µÄ¡£ÓëFreeBSD 5.3ÔÚº¯ÊýÃûÉϵÄÏàËƶÈÓÐ99.45%¡£Õâ¸öÏàËƳ̶ÈÊ®·Ö¾ªÈË£¬µ«Êǽöƾº¯ÊýÃûÏàËƲ»×ãÒÔ˵Ã÷Âß¼­ÉÏÏàËÆ£¬Òò´Ë£¬ÔÚ·ÖÎö±¨¸æÖУ¬Õâ¸ö·ÖÎöÊý¾ÝÖ»×÷Ϊ²Î¿¼Êý¾Ý·Åµ½¸½Â¼ÖС£¸ÐÐËȤµÄÅóÓÑ¿ÉÒÔ
½µÄ·ÖÎö¡£

 

¸½Â¼B ²Î¿¼×ÊÁÏ
 
1.          ÷è÷ë¹Ù·½ÍøÕ¾      http://www.kylin.org.cn/
2.          863¼Æ»®¹Ù·½ÍøÕ¾         http://www.863.org.cn/
3.          ¡¶¹ØÓÚÒøºÓ÷è÷ë²Ù×÷ϵͳµÄ˵Ã÷¡· http://www.kylin.org.cn/download.htm
4.          GNU AssemblerÊֲᠠ   http://sourceware.org/binutils/docs-2.16/as/index.html
5.          Levenshtein Distance, in Three Flavors, by Michael Gilleland        http://www.merriampark.com/ld.htm
6.          Î¬»ù°Ù¿ÆÈ«Êé: Levenshtein Distance                 http://en.wikipedia.org/wiki/Levenshtein_distance
7.          An Algorithm for Differential File Comparison, by J. W. Hunt, M. D. Mcllroy http://www.cs.dartmouth.edu/~dou
8.          »ùÓڸĽø±à¼­¾àÀëµÄÖÐÎÄÏàËƾä×Ó¼ìË÷   ³µÍòÏè¡¢Áõͦ¡¢ÇرøºÍÀîÉú   http://ir.hit.edu.cn/
9.          A Brief History of FreeBSD    http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/history.html
10.       Î¬»ù°Ù¿ÆÈ«Ê飺NetBSD                  http://en.wikipedia.org/wiki/NetBSD
11.       Î¬»ù°Ù¿ÆÈ«Ê飺OpenBSD      http://en.wikipedia.org/wiki/Openbsd
12.       Linus Torvalds biography                 http://www.linux.org/lininfo/linus.html
13.       A Brief History of Solaris (PDF)                http://unixed.com/Resources/history_of_solaris.pdf
14.       Overview of OpenSolaris                  http://www.opensolaris.org/os/about/
15.       FreeBSD 5.2.1 Release Notes http://www.freebsd.org/releases/5.2.1R/relnotes-i386.html#SECURITY
16.       Î¬»ù°Ù¿ÆÈ«Ê飺UNIX System V      http://en.wikipedia.org/wiki/SVR4
17.       FreeBSD Handbook, Chapter 10 Linux Binary Compatibility          
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/linuxemu-advanced.html
18.       Man page of PROCFS(5)        
http://www.freebsd.org/cgi/man.cgi?query=procfs&sektion=5&manpath=FreeBSD+5.4-RELEASE



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