<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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>7 ^& ]5 P/ K7 @: E% Y% U+ g- l7 ~* v# 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 style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">有时如果你对<SPAN lang=EN-US>SICE,TRW或者其他调试器显示的信息有所怀疑的话,你可以用seh显示一些信息作为简单的调试手段,当然,单步跟踪的用途远不止于此.首先回忆一下我们以前了解的单步的概念,当EFLAGS的TF位为1的话执行完某条指令后CPU将产生单步异常,与执行软指令int1类似.注意产生单步陷阱后eip已经指向下一条指令.但进入单步异常处理程序后cpu自动清除TF,以便下条指令正常执行.</SPAN></SPAN></P>9 k2 G* ?3 t3 ^& O1 w3 E( g0 N1 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>7 h: h/ }( N: u5 a( N1 l; V) e
<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: 宋体; mso-bidi-font-size: 12.0pt">我们要作的就是在<SPAN lang=EN-US>seh例程中继续置TF位为1,以便下一条指令执行完毕后继续产生单步陷阱实现跟踪功能,直到遇到popfd指令为止,当然你也可以随便检测其他指令或者用记数器来终止单步.</SPAN></SPAN></P>
, o: Y* i7 h, t: d4 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>0 O. }- }; J8 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 style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">下面例子中如果没有单步跟踪<SPAN lang=EN-US>eax的最后结果是3,由于有了单步自跟踪,在seh处理例程中我们每中断一次要加1,所以最后的结果是7,呵呵.请看下面的例子.</SPAN></SPAN></P>- D+ ]% ]3 a8 G% u, 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: 宋体; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>
8 B5 @* @! Q/ d' b6 N5 |& 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: 宋体; mso-bidi-font-size: 12.0pt">;Ex7,演示利用seh单步自跟踪 by Hume,2002</SPAN></P>) P" y) t5 `) y6 ^$ Z+ 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: 宋体; mso-bidi-font-size: 12.0pt">;humewen@21cn.com </SPAN></P>% d3 L/ L2 z t; w8 L0 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: 宋体; mso-bidi-font-size: 12.0pt">;hume.longcity.net</SPAN></P>
, q3 L! p5 {2 ] 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: 宋体; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>4 T# {% C* E! 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: 宋体; mso-bidi-font-size: 12.0pt">.586</SPAN></P>
% m% d4 W- {/ j8 E" A# 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: 宋体; mso-bidi-font-size: 12.0pt">.model flat, stdcall</SPAN></P>
5 G: ]$ R4 V' t$ L& o. Y& F! m- 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: 宋体; mso-bidi-font-size: 12.0pt">option casemap :none<SPAN style="mso-spacerun: yes"> </SPAN>; case sensitive</SPAN></P>/ G/ I2 s3 f8 ]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: 宋体; mso-bidi-font-size: 12.0pt">include hd.h</SPAN></P>
m' N8 a! V3 J" T7 Y3 `6 r! 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: 宋体; mso-bidi-font-size: 12.0pt">include mac.h</SPAN></P>( b1 T/ T1 @- F' h/ 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>) E3 i4 s% x$ ~+ m. m7 x, `; a( 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: 宋体; mso-bidi-font-size: 12.0pt">singlestep_xHandler<SPAN style="mso-tab-count: 1"> </SPAN><SPAN style="mso-tab-count: 1"> </SPAN>proto C :DWORD,:DWORD,:DWORD,:DWORD</SPAN></P>' e1 k; ^# Y6 k4 u3 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: 宋体; mso-bidi-font-size: 12.0pt">;;--------------</SPAN></P>7 Z/ y, Y& n, e6 D( F! H; b1 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: 宋体; mso-bidi-font-size: 12.0pt">.data</SPAN></P>
0 \$ {5 U9 ^. ^4 C- [& 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: 宋体; mso-bidi-font-size: 12.0pt">count<SPAN style="mso-spacerun: yes"> </SPAN>dd<SPAN style="mso-spacerun: yes"> </SPAN>0</SPAN></P>
+ ^1 Y( z1 \/ x6 z+ Z$ 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: 宋体; mso-bidi-font-size: 12.0pt">Msg0<SPAN style="mso-spacerun: yes"> </SPAN>db<SPAN style="mso-spacerun: yes"> </SPAN>"Eax=="</SPAN></P>
5 v9 S# M9 H$ R# R0 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: 宋体; mso-bidi-font-size: 12.0pt">DispEAX dd<SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN>0,0</SPAN></P>( L3 L/ F# @. a: N% y" 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: 宋体; mso-bidi-font-size: 12.0pt">;;-----------------------------------------</SPAN></P>4 { q$ x Y8 Q. 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: 宋体; mso-bidi-font-size: 12.0pt">.CODE</SPAN></P>5 s* Q; W, S7 W, [) 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: 宋体; mso-bidi-font-size: 12.0pt">_Start:</SPAN></P>
, O! P f+ _7 z& h9 G( 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>assume fs:nothing</SPAN></P>
" @& J3 R: h3 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: 宋体; mso-bidi-font-size: 12.0pt">push<SPAN style="mso-spacerun: yes"> </SPAN>offset singlestep_xHandler</SPAN></P>
# S& N4 |2 z& L. [1 P6 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>push<SPAN style="mso-spacerun: yes"> </SPAN>fs:[0]</SPAN></P>
, ^% }/ ^! u: K& 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>fs:[0],esp</SPAN></P>. U5 b. {. L* {% x/ 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>;------------------</SPAN></P>
6 G5 z! P! 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>xor<SPAN style="mso-spacerun: yes"> </SPAN>eax,eax</SPAN></P>1 h! |* ]( w1 u5 ~# o2 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>pushfd</SPAN></P>6 _. m* [2 _2 L+ `) O) p; 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>pushfd</SPAN></P>
- I9 {, C- d$ P/ 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN>or<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esp],100h<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>$ c# ?; J! j% ?; ]9 ]4 r4 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>popfd<SPAN style="mso-spacerun: yes"> </SPAN>;置TF标志进入单步状态</SPAN></P>; {2 h, ?" U3 }' l& ~4 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>- F( Y6 v( k/ ^! n& m3 n( 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>nop<SPAN style="mso-spacerun: yes"> </SPAN>; nop执行完后单步异常引发<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
& k4 w; x. k- x5 E' n! N8 U6 ~* 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>inc<SPAN style="mso-spacerun: yes"> </SPAN>eax<SPAN style="mso-spacerun: yes"> </SPAN>; eip指向,nop后面的指令,就是这里</SPAN></P># ^7 l9 f( E1 a+ C& 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>inc<SPAN style="mso-spacerun: yes"> </SPAN>eax<SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN>; 单步执行</SPAN></P>4 {. x& K6 X9 H( W$ S! 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>inc<SPAN style="mso-spacerun: yes"> </SPAN>eax<SPAN style="mso-spacerun: yes"> </SPAN>; normal eax==3,but infact eax==7</SPAN></P>9 O: }( H2 h, B: F# S; Z3 O3 G/ 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>
( c' p/ [8 i2 E: 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>popfd</SPAN></P>
4 S V' i$ ]! E% Z: 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>;------------------ </SPAN></P>9 Z5 y( _# {9 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>add<SPAN style="mso-spacerun: yes"> </SPAN>eax,30h<SPAN style="mso-spacerun: yes"> </SPAN>;convert to ASCIIZ</SPAN></P>
- T6 A6 ?9 ]. 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>DispEAX,eax</SPAN></P>
8 Y0 ^/ H% V0 G1 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>invoke<SPAN style="mso-tab-count: 1"> </SPAN>MessageBox,0,addr Msg0,ddd("The Eax equal to..."),0</SPAN></P>- o T: j* [. a) f- @4 O/ c& 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>! p- b) 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 lang=EN-US style="FONT-SIZE: 10pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>pop<SPAN style="mso-spacerun: yes"> </SPAN>fs:[0]</SPAN></P>/ v1 g: p6 [: W' j0 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>add<SPAN style="mso-spacerun: yes"> </SPAN>esp,4</SPAN></P>: L5 R8 h0 k1 j! F$ 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>invoke<SPAN style="mso-tab-count: 1"> </SPAN>ExitProcess,0</SPAN></P>$ k' }# F% a! X( S$ {9 n# I) 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: 宋体; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>
* u/ ?3 R! l z7 |<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: 宋体; mso-bidi-font-size: 12.0pt">singlestep_xHandler PROC C pExcept:DWORD,pFrame:DWORD,pContext:DWORD,pDispatch:DWORD</SPAN></P>
# I3 Q0 K4 r" f) Q; |; ]$ A' 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>pushad<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>, u/ U- `' N6 r; u% 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: 宋体; mso-bidi-font-size: 12.0pt">assume<SPAN style="mso-spacerun: yes"> </SPAN>edi:ptr CONTEXT</SPAN></P>! C1 b5 u( o( L3 E" 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: 宋体; mso-bidi-font-size: 12.0pt">assume<SPAN style="mso-spacerun: yes"> </SPAN>esi:ptr EXCEPTION_RECORD</SPAN></P>
/ q( a$ }' F1 V: B2 w& P" 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
' Q j) @ `) B2 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>esi,pExcept</SPAN></P>
! t& i$ k& k1 Y% S, B5 F4 h8 Y2 c6 }<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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>edi,pContext<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
2 i. \7 t8 d0 F! H9 K$ 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>* a# F' P/ P- P0 V- 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>test<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esi+4],1<SPAN style="mso-spacerun: yes"> </SPAN>;Exception flags test common stuff</SPAN></P>
, q& Y7 b3 G' L% T0 `<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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>jnz<SPAN style="mso-spacerun: yes"> </SPAN>@f<SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>- a" O2 V! j2 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>test<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esi+4],6</SPAN></P>$ |/ \# k0 S( K8 k. d9 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>jnz<SPAN style="mso-spacerun: yes"> </SPAN>@f</SPAN></P>& W2 u: l6 i( P6 `' G3 {( ?5 U0 S8 N; 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>cmp<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esi],80000004h<SPAN style="mso-spacerun: yes"> </SPAN>;是否为单步异常标志</SPAN></P># G, I [7 Q1 p ?. y$ E* i/ M5 ~
<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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>jnz<SPAN style="mso-spacerun: yes"> </SPAN>@f</SPAN></P>
( D: {0 Z! }. {: H1 E. O' R0 K" 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>7 K5 i4 m4 ^$ G4 [. c0 o# s: 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>inc<SPAN style="mso-spacerun: yes"> </SPAN>[edi].regEax </SPAN></P>
% d8 V' C5 J+ P$ _3 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>ebx,[edi].regEip</SPAN></P>; S- ]+ ]5 e/ x; ?* ?( 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>cmp<SPAN style="mso-spacerun: yes"> </SPAN>byte ptr[ebx],9Dh<SPAN style="mso-spacerun: yes"> </SPAN>;是否是popfd,因为目的是取消</SPAN></P>+ [* g# M; K3 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>jz<SPAN style="mso-spacerun: yes"> </SPAN>@finish_singlestep<SPAN style="mso-spacerun: yes"> </SPAN>;单步状态,所以这时就不应该重置TF</SPAN></P>
, J" j& r9 x, c2 c, 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>or<SPAN style="mso-spacerun: yes"> </SPAN>[edi].regFlag,100h<SPAN style="mso-spacerun: yes"> </SPAN>;否则,重置TF<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
$ V1 D, z+ u% n: z* v$ N7 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>;每单步中断一次,eax加1</SPAN></P>, Z7 |+ ?2 ]0 H( v7 T2 _9 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>;所以eax最后不等于3,而是</SPAN></P>
3 z% ], M2 @4 P1 X7 ~" y k8 p- U( 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>;中断4次后,eax==7<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>/ k& u) M/ z( e# i/ 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: 宋体; mso-bidi-font-size: 12.0pt">@finish_singlestep:<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>/ b3 l+ E: ~. l8 p0 ~
<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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
* o2 x S6 _0 ]* G$ o2 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esp+7*4],0<SPAN style="mso-spacerun: yes"> </SPAN>;eax==0<SPAN style="mso-spacerun: yes"> </SPAN>hehe...</SPAN></P>
% u7 ]7 I+ ?1 _<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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>popad<SPAN style="mso-spacerun: yes"> </SPAN>;研究一下pushad指令就明白了</SPAN></P>
2 y0 i/ O( `; M+ 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>ret</SPAN></P>2 U- K3 O' }( u: Q* 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: 宋体; mso-bidi-font-size: 12.0pt">@@:</SPAN></P>- b/ _% c; l; c; ^4 s& c, 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>mov<SPAN style="mso-spacerun: yes"> </SPAN>dword ptr[esp+7*4],1<SPAN style="mso-spacerun: yes"> </SPAN>;eax==1</SPAN></P>0 V) r9 C( w1 z/ ~. E& ^! 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>popad<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>: ^3 O9 j0 t5 G& 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: 宋体; mso-bidi-font-size: 12.0pt"><SPAN style="mso-spacerun: yes"> </SPAN>ret</SPAN></P>
/ y; @' h5 p, }" w0 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: 宋体; mso-bidi-font-size: 12.0pt"></SPAN> </P>7 w( J: Y+ y( A7 R4 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: 宋体; mso-bidi-font-size: 12.0pt">singlestep_xHandler ENDP</SPAN></P>' M% U( l) A2 q0 t/ v+ 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: 宋体; mso-bidi-font-size: 12.0pt">;-----------------------------------------</SPAN></P>
" H, g9 v. j, 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: 宋体; mso-bidi-font-size: 12.0pt">END<SPAN style="mso-tab-count: 1"> </SPAN>_Start</SPAN></P> |
|本地广告联系: QQ:905790666 TEL:13176190456|Archiver|手机版|小黑屋|汶上信息港
( 鲁ICP备19052200号-1 )
发表于 2008-9-28 16:36:42
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡