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          seh實(shí)現(xiàn)單步自跟蹤.

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          發(fā)表于 2008-9-28 16:36:42 | 只看該作者 |倒序?yàn)g覽 |閱讀模式
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>
          5 Q* M$ [2 \8 w- y6 E<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">有時(shí)如果你對(duì)<SPAN lang=EN-US>SICE,TRW或者其他調(diào)試器顯示的信息有所懷疑的話,你可以用seh顯示一些信息作為簡單的調(diào)試手段,當(dāng)然,單步跟蹤的用途遠(yuǎn)不止于此.首先回憶一下我們以前了解的單步的概念,當(dāng)EFLAGS的TF位為1的話執(zhí)行完某條指令后CPU將產(chǎn)生單步異常,與執(zhí)行軟指令int1類似.注意產(chǎn)生單步陷阱后eip已經(jīng)指向下一條指令.但進(jìn)入單步異常處理程序后cpu自動(dòng)清除TF,以便下條指令正常執(zhí)行.</SPAN></SPAN></P>: B$ {' r; C# g/ r( ]- m
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN></P>
          & C, M7 A2 h8 L; n6 s4 p<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 30pt; mso-char-indent-count: 3.0; mso-char-indent-size: 10.0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">我們要作的就是在<SPAN lang=EN-US>seh例程中繼續(xù)置TF位為1,以便下一條指令執(zhí)行完畢后繼續(xù)產(chǎn)生單步陷阱實(shí)現(xiàn)跟蹤功能,直到遇到popfd指令為止,當(dāng)然你也可以隨便檢測(cè)其他指令或者用記數(shù)器來終止單步.</SPAN></SPAN></P>
          1 F5 a4 |, z. Y: x/ ], i: x3 N<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>! t5 y: j" B9 o1 V3 R
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">下面例子中如果沒有單步跟蹤<SPAN lang=EN-US>eax的最后結(jié)果是3,由于有了單步自跟蹤,在seh處理例程中我們每中斷一次要加1,所以最后的結(jié)果是7,呵呵.請(qǐng)看下面的例子.</SPAN></SPAN></P>
          / D( i" [" r/ S" \, m6 C<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>) ~" E: m- T+ x0 E' N) _; n
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;Ex7,演示利用seh單步自跟蹤 by Hume,2002</SPAN></P>
          , w9 k$ ~" ?& b0 E* x<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;humewen@21cn.com </SPAN></P>6 d; _$ `3 f+ q: h; l
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;hume.longcity.net</SPAN></P>
          0 t- p  q. d; y/ o! X1 h7 Z) Q<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P># F5 g, P8 D- Q/ J4 j
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">.586</SPAN></P>$ G' Q/ |! ]; s+ D
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">.model flat, stdcall</SPAN></P>
          * v6 M# [3 o$ g- f2 _( V" S<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">option casemap :none<SPAN style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN>; case sensitive</SPAN></P>
          - A$ s5 J) H1 V+ A: u<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">include hd.h</SPAN></P>1 l, C4 u& S% h3 d9 |0 e
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">include mac.h</SPAN></P>
          3 M' @; {3 v4 O2 e- o+ {! D4 u<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>% ]: j8 z, b. X( o
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">singlestep_xHandler<SPAN style="mso-tab-count: 1">&nbsp; </SPAN><SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN>proto C :DWORD,:DWORD,:DWORD,:DWORD</SPAN></P>' k8 {8 Y* X3 Q# A0 x! ?1 W
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;;--------------</SPAN></P>7 ^2 Y/ V( Y; d: U3 v% D
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">.data</SPAN></P>
          " @0 \. N  R' w. A8 d<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">count<SPAN style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN>dd<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>0</SPAN></P>3 B  w: ^, I( q) ^
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">Msg0<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>db<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>"Eax=="</SPAN></P>
          4 U! }+ D3 q  O/ H  D, G  z( a/ l<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">DispEAX dd<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;</SPAN>0,0</SPAN></P>
          8 ?) T6 i& Z0 S) j; I! H<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;;-----------------------------------------</SPAN></P>
          3 ^- |6 ?7 @  C: x& Q4 r<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">.CODE</SPAN></P>+ I" ?) K  Y. s5 g! ]
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">_Start:</SPAN></P>
            a5 N) M$ e& }) R0 \% b) O, P<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp; </SPAN>assume fs:nothing</SPAN></P>
          ) b2 y0 u0 M/ E8 z9 ~6 V<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">push<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>offset singlestep_xHandler</SPAN></P>
          1 R2 u7 g$ f& p1 O  u5 c<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>push<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>fs:[0]</SPAN></P>
            \! b2 o1 B$ v( q$ i<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>fs:[0],esp</SPAN></P>. ~- q4 j! {, t8 M, z
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;------------------</SPAN></P>
          0 h& N! G- _8 `<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>xor<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>eax,eax</SPAN></P>
          . ?9 O- z, a6 f' e<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>pushfd</SPAN></P>
          5 @: v* N- b& W" p' N: w* B<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>pushfd</SPAN></P>$ ?, v1 i8 n8 A0 B+ S( G- o* x
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</SPAN>or<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esp],100h<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          0 \, `5 q6 x/ t) b# C1 F% [<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>popfd<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;置TF標(biāo)志進(jìn)入單步狀態(tài)</SPAN></P>
          ( M6 Q% L# `/ e) J* V% W/ G3 l3 }$ K' U<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>
          ( z3 F1 {; F. o/ r( H, o6 m; e6 m<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>nop<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>; nop執(zhí)行完后單步異常引發(fā)<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN></P>) W& x* j. K1 s: d, |
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>inc<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>eax<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>; eip指向,nop后面的指令,就是這里</SPAN></P>3 t! z7 z2 W  Z/ b8 E7 P
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>inc<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>eax<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN>; 單步執(zhí)行</SPAN></P>6 m( {$ I5 J% u" f
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>inc<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>eax<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>; normal eax==3,but infact eax==7</SPAN></P>
          - T# v9 u3 b' ^1 W, v<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>
          - Z4 f5 @; T! E9 L* ~<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>popfd</SPAN></P>; S7 M3 N9 ]) T5 {, V; o
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;------------------ </SPAN></P>
          5 c& h. g* @/ s<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>add<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>eax,30h<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;convert to ASCIIZ</SPAN></P>
            W4 ~7 t9 T- ^<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>DispEAX,eax</SPAN></P>
          2 @1 a9 `& D% M: e6 Z  a<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>invoke<SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN>MessageBox,0,addr Msg0,ddd("The Eax equal to..."),0</SPAN></P>
          2 ]; }& v& K+ j) _7 F2 B& `<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>! N2 e  h+ D2 v' N0 y) S
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>pop<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>fs:[0]</SPAN></P>; U# m: B) m, h
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>add<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>esp,4</SPAN></P>
          2 d8 j, e* M6 r4 t% z  \<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>invoke<SPAN style="mso-tab-count: 1">&nbsp;&nbsp;&nbsp; </SPAN>ExitProcess,0</SPAN></P>) B! c* @2 k8 C3 h- \: i
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>/ M: z2 W- v2 L
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">singlestep_xHandler PROC C pExcept:DWORD,pFrame:DWORD,pContext:DWORD,pDispatch:DWORD</SPAN></P>, j& w6 t0 j; s( j
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>pushad<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>+ j$ V- S8 C2 ^1 \: q  @
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">assume<SPAN style="mso-spacerun: yes">&nbsp; </SPAN>edi:ptr CONTEXT</SPAN></P>( m# h! E3 m! q/ s
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">assume<SPAN style="mso-spacerun: yes">&nbsp; </SPAN>esi:ptr EXCEPTION_RECORD</SPAN></P>8 M. b+ z; C/ S+ H, s6 A  W
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          ' v1 k% Y9 a- q! i<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>esi,pExcept</SPAN></P>6 [# Q) R/ T# s5 i+ U% f: n5 W
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>edi,pContext<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          ) H% U8 Z, G0 s9 Y  `<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P># e7 \  k3 _, I) N& S, `' p' y
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>test<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esi+4],1<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;Exception flags test common stuff</SPAN></P>+ i- G2 K9 ~. C- a3 r2 ]) F2 T& E
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>jnz<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>@f<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</SPAN></SPAN></P>* f. a8 e; h* D
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>test<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esi+4],6</SPAN></P>
          % j  N4 m% ~8 s$ h1 ^; V6 U<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>jnz<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>@f</SPAN></P>
          - s3 R) j* @, @: {<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>cmp<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esi],80000004h<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;是否為單步異常標(biāo)志</SPAN></P>
          ) O9 C# \6 B  {: h<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>jnz<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>@f</SPAN></P>0 O4 h' K6 p: r5 v+ n2 h
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>5 d7 Y/ r' D1 a0 l9 w
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>inc<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>[edi].regEax </SPAN></P>
          3 m. `" x6 T% f<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>ebx,[edi].regEip</SPAN></P>/ c1 d! \" ~; N) N
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>cmp<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>byte ptr[ebx],9Dh<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;是否是popfd,因?yàn)槟康氖侨∠?lt;/SPAN></P>2 A% W6 T0 }  G  |1 i% p5 ^" A
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>jz<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>@finish_singlestep<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;單步狀態(tài),所以這時(shí)就不應(yīng)該重置TF</SPAN></P>7 A$ O7 n  S. M
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>or<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>[edi].regFlag,100h<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;否則,重置TF<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          1 n! B! O* v$ l" w  x' q4 T<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;每單步中斷一次,eax加1</SPAN></P>
          2 |! b4 [$ C! l! W5 n0 W* k<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;所以eax最后不等于3,而是</SPAN></P>6 Y& }$ T; `( O3 T  x
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;中斷4次后,eax==7<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          4 D. {8 G$ C/ |  E3 w/ H& w<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">@finish_singlestep:<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          : P$ h" y* |7 j- z+ g! Y<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>0 {8 X- V' |+ F
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esp+7*4],0<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;eax==0<SPAN style="mso-spacerun: yes">&nbsp; </SPAN>hehe...</SPAN></P>$ w; S/ c1 ?/ K* u2 M
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>popad<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;研究一下pushad指令就明白了</SPAN></P>  a+ P1 B% w- S: ]% `" c; T8 D
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>ret</SPAN></P>
          + P9 q/ K0 j4 }! v/ s& c3 h/ m1 V<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">@@:</SPAN></P>0 U9 O2 g% \* p! O. Q, I3 B' e
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>mov<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>dword ptr[esp+7*4],1<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>;eax==1</SPAN></P>8 {. g+ P2 T* r. ]# n3 p! w
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>popad<SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN></P>
          ; S5 m4 F5 v0 R<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </SPAN>ret</SPAN></P>
          ; B  J8 p6 q0 g2 W0 b+ F<P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt"></SPAN>&nbsp;</P>- T3 \7 ?2 z6 S. @8 ]0 ~
          <P class=MsoNormal style="LAYOUT-GRID-MODE: char; TEXT-INDENT: 20pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.0pt"><SPAN lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 12.0pt">singlestep_xHandler ENDP</SPAN></P>
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