【问题标题】:Annotated disassembly of executable带注释的可执行文件反汇编
【发布时间】:2014-08-05 13:45:48
【问题描述】:

将 C 程序编译为目标文件时,很容易让 Microsoft 编译器使用 cl /Fa 为您提供带注释的反汇编(带有函数和变量的名称、源代码行号等)。

我试图从最终链接的可执行文件中获得类似的东西(假设程序是使用适当的调试信息编译的),这似乎更棘手; dumpbinobjdump 似乎只提供无注释的反汇编。

获得这个的最好方法是什么?

【问题讨论】:

    标签: c windows visual-studio reverse-engineering disassembly


    【解决方案1】:

    如果你有使用 debuginfo 编译的程序,windbg 应该提供带有行号的函数的反汇编

    使用调试信息编译的示例代码和使用 /Fa 生成的程序集文件

    C:\codesnips\comparesrc\debug>cl /Zi /Fa comparesrc.cpp /link /Debug
    
    comparesrc.cpp
    
    /out:comparesrc.exe
    /debug
    /Debug
    comparesrc.obj
    

    以上编译的源码

    C:\codesnips\comparesrc\debug>type comparesrc.cpp
    #include <stdio.h>  // standard include file
    int main (void)
    { // this line will become prolog
        printf("hello my dear source compare\n");  // see str in .data section
        puts("c");  // will put a char* with line break to console
        puts("om");
        puts("pare");
        int a,b,c,d;
        a = 2; b =3 ; c = 4;
        d = a+b-c;    // 2+3 -4 = 1
        printf("%d\n",d);  // should print 1
        d = (a*b)/c;  // 2*3 /4 = 6 /4  numerator = 1
        printf("%d\n",d);  // should printf 1
        d = (a*b)%c;   // 2 * 3 % 4 denominator = 2
        printf("%d\n",d);  // should print 2
        return 0;   // lets generate a cod file and see the assembly
    }   // this line will get converted to epilog
    

    /Fa 开关创建的汇编文件

    C:\codesnips\comparesrc\debug>type comparesrc.asm
    ; Listing generated by Microsoft (R) Optimizing Compiler Version 16.00.30319.01
    
    
            TITLE   C:\codesnips\comparesrc\debug\comparesrc.cpp
            .686P
            .XMM
            include listing.inc
            .model  flat
    
    INCLUDELIB LIBCMT
    INCLUDELIB OLDNAMES
    
    CONST   SEGMENT
    $SG3850 DB      'hello my dear source compare', 0aH, 00H
            ORG $+2
    $SG3851 DB      'c', 00H
            ORG $+2
    $SG3852 DB      'om', 00H
            ORG $+1
    $SG3853 DB      'pare', 00H
            ORG $+3
    $SG3858 DB      '%d', 0aH, 00H
    $SG3859 DB      '%d', 0aH, 00H
    $SG3860 DB      '%d', 0aH, 00H
    CONST   ENDS
    PUBLIC  _main
    EXTRN   _puts:PROC
    EXTRN   _printf:PROC
    ; Function compile flags: /Odtp
    _TEXT   SEGMENT
    _c$ = -16                                               ; size = 4
    _d$ = -12                                               ; size = 4
    _b$ = -8                                                ; size = 4
    _a$ = -4                                                ; size = 4
    _main   PROC
    ; File c:\codesnips\comparesrc\debug\comparesrc.cpp
    ; Line 3
            push    ebp
            mov     ebp, esp
            sub     esp, 16                                 ; 00000010H
    ; Line 4
            push    OFFSET $SG3850
            call    _printf
            add     esp, 4
    ; Line 5
            push    OFFSET $SG3851
            call    _puts
            add     esp, 4
    ; Line 6
            push    OFFSET $SG3852
            call    _puts
            add     esp, 4
    ; Line 7
            push    OFFSET $SG3853
            call    _puts
            add     esp, 4
    ; Line 9
            mov     DWORD PTR _a$[ebp], 2
            mov     DWORD PTR _b$[ebp], 3
            mov     DWORD PTR _c$[ebp], 4
    ; Line 10
            mov     eax, DWORD PTR _a$[ebp]
            add     eax, DWORD PTR _b$[ebp]
            sub     eax, DWORD PTR _c$[ebp]
            mov     DWORD PTR _d$[ebp], eax
    ; Line 11
            mov     ecx, DWORD PTR _d$[ebp]
            push    ecx
            push    OFFSET $SG3858
            call    _printf
            add     esp, 8
    ; Line 12
            mov     eax, DWORD PTR _a$[ebp]
            imul    eax, DWORD PTR _b$[ebp]
            cdq
            idiv    DWORD PTR _c$[ebp]
            mov     DWORD PTR _d$[ebp], eax
    ; Line 13
            mov     edx, DWORD PTR _d$[ebp]
            push    edx
            push    OFFSET $SG3859
            call    _printf
            add     esp, 8
    ; Line 14
            mov     eax, DWORD PTR _a$[ebp]
            imul    eax, DWORD PTR _b$[ebp]
            cdq
            idiv    DWORD PTR _c$[ebp]
            mov     DWORD PTR _d$[ebp], edx
    ; Line 15
            mov     eax, DWORD PTR _d$[ebp]
            push    eax
            push    OFFSET $SG3860
            call    _printf
            add     esp, 8
    ; Line 16
            xor     eax, eax
    ; Line 17
            mov     esp, ebp
            pop     ebp
            ret     0
    _main   ENDP
    _TEXT   ENDS
    END
    

    最后使用 cdb(windbg 的控制台版本)反汇编完整的 main 函数

    cdb -c ".lines;g main;uf @eip;q;"比较rc.exe

    Microsoft (R) Windows Debugger Version 6.12.0002.633 X86    
    CommandLine: comparesrc.exe    
    0:000> cdb: Reading initial command '.lines;g main;uf @eip;q;'    
    Line number information will be loaded
    comparesrc!main [c:\codesnips\comparesrc\debug\comparesrc.cpp @ 3]:
        3 00401010 55              push    ebp
        3 00401011 8bec            mov     ebp,esp
        3 00401013 83ec10          sub     esp,10h
        4 00401016 685c8c4100      push    offset comparesrc!__xt_z+0x120 (00418c5c)
    
        4 0040101b e81b020000      call    comparesrc!printf (0040123b)
        4 00401020 83c404          add     esp,4
        5 00401023 687c8c4100      push    offset comparesrc!__xt_z+0x140 (00418c7c)
    
        5 00401028 e8bf000000      call    comparesrc!puts (004010ec)
        5 0040102d 83c404          add     esp,4
        6 00401030 68808c4100      push    offset comparesrc!__xt_z+0x144 (00418c80)
    
        6 00401035 e8b2000000      call    comparesrc!puts (004010ec)
        6 0040103a 83c404          add     esp,4
        7 0040103d 68848c4100      push    offset comparesrc!__xt_z+0x148 (00418c84)
    
        7 00401042 e8a5000000      call    comparesrc!puts (004010ec)
        7 00401047 83c404          add     esp,4
        9 0040104a c745fc02000000  mov     dword ptr [ebp-4],2
        9 00401051 c745f803000000  mov     dword ptr [ebp-8],3
        9 00401058 c745f004000000  mov     dword ptr [ebp-10h],4
       10 0040105f 8b45fc          mov     eax,dword ptr [ebp-4]
       10 00401062 0345f8          add     eax,dword ptr [ebp-8]
       10 00401065 2b45f0          sub     eax,dword ptr [ebp-10h]
       10 00401068 8945f4          mov     dword ptr [ebp-0Ch],eax
       11 0040106b 8b4df4          mov     ecx,dword ptr [ebp-0Ch]
       11 0040106e 51              push    ecx
       11 0040106f 688c8c4100      push    offset comparesrc!__xt_z+0x150 (00418c8c)
    
       11 00401074 e8c2010000      call    comparesrc!printf (0040123b)
       11 00401079 83c408          add     esp,8
       12 0040107c 8b45fc          mov     eax,dword ptr [ebp-4]
       12 0040107f 0faf45f8        imul    eax,dword ptr [ebp-8]
       12 00401083 99              cdq
       12 00401084 f77df0          idiv    eax,dword ptr [ebp-10h]
       12 00401087 8945f4          mov     dword ptr [ebp-0Ch],eax
       13 0040108a 8b55f4          mov     edx,dword ptr [ebp-0Ch]
       13 0040108d 52              push    edx
       13 0040108e 68908c4100      push    offset comparesrc!__xt_z+0x154 (00418c90)
    
       13 00401093 e8a3010000      call    comparesrc!printf (0040123b)
       13 00401098 83c408          add     esp,8
       14 0040109b 8b45fc          mov     eax,dword ptr [ebp-4]
       14 0040109e 0faf45f8        imul    eax,dword ptr [ebp-8]
       14 004010a2 99              cdq
       14 004010a3 f77df0          idiv    eax,dword ptr [ebp-10h]
       14 004010a6 8955f4          mov     dword ptr [ebp-0Ch],edx
       15 004010a9 8b45f4          mov     eax,dword ptr [ebp-0Ch]
       15 004010ac 50              push    eax
       15 004010ad 68948c4100      push    offset comparesrc!__xt_z+0x158 (00418c94)
    
       15 004010b2 e884010000      call    comparesrc!printf (0040123b)
       15 004010b7 83c408          add     esp,8
       16 004010ba 33c0            xor     eax,eax
       17 004010bc 8be5            mov     esp,ebp
       17 004010be 5d              pop     ebp
       17 004010bf c3              ret
    

    【讨论】:

      【解决方案2】:

      你可以使用

      Windbg -z <any image> 
      

      对该图像执行反汇编或任何检查(也可与 cdb \ kd 一起使用)。 您无需实际运行程序即可查看源代码行、符号、类型。

      这对于查看 DLL 很有用,但当您想要查看为其他体系结构或无法在您的机器上运行的设备驱动程序编译的代码时非常必要。

      例如

      cdb -z ntoskrnl.exe
      

      将让您检查 Windows 内核的代码。

      这比故障转储更强大,因为您不仅可以看到分页的代码 - 您还可以看到 所有 .exe 中的代码

      【讨论】:

        猜你喜欢
        • 1970-01-01
        • 1970-01-01
        • 2018-05-19
        • 1970-01-01
        • 1970-01-01
        • 1970-01-01
        • 2014-03-06
        • 2010-12-11
        相关资源
        最近更新 更多