_cdecl,_stdcall,_fastcall 三种调用约定

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</pre><p>头文件代码：</p><pre code_snippet_id="500324" snippet_file_name="blog_20141029_3_748927" name="code" class="cpp">void _cdecl demo_cdecl(int, int, int){};void _stdcall demo_stdcall(int, int, int){};void _fastcall demo_fastcall(int, int, int){};

源文件代码：

#include "test.h"void main(){calling_convention();//调用3种约定}void calling_convention(){demo_cdecl(1,2,3);demo_stdcall(1, 2, 3);demo_fastcall(1, 2, 3);}

反汇编代码：

.text:004133C0 ; void __cdecl calling_convention().text:004133C0 ?calling_convention@@YAXXZ proc near    ; CODE XREF: calling_convention(void)j.text:004133C0.text:004133C0 var_C0          = byte ptr -0C0h.text:004133C0.text:004133C0                 push    ebp.text:004133C1                 mov     ebp, esp.text:004133C3                 sub     esp, 0C0h.text:004133C9                 push    ebx.text:004133CA                 push    esi.text:004133CB                 push    edi.text:004133CC                 lea     edi, [ebp+var_C0].text:004133D2                 mov     ecx, 30h.text:004133D7                 mov     eax, 0CCCCCCCCh.text:004133DC                 rep stosd.text:004133DE                 push    3               ; __formal.text:004133E0                 push    2               ; __formal.text:004133E2                 push    1               ; __formal.text:004133E4                 call    j_?demo_cdecl@@YAXHHH@Z ; demo_cdecl(int,int,int).text:004133E9                 add     esp, 0Ch.text:004133EC                 push    3               ; __formal.text:004133EE                 push    2               ; __formal.text:004133F0                 push    1               ; __formal.text:004133F2                 call    j_?demo_stdcall@@YGXHHH@Z ; demo_stdcall(int,int,int).text:004133F7                 push    3               ; __formal.text:004133F9                 mov     edx, 2          ; __formal.text:004133FE                 mov     ecx, 1          ; __formal.text:00413403                 call    j_?demo_fastcall@@YIXHHH@Z ; demo_fastcall(int,int,int).text:00413408                 pop     edi.text:00413409                 pop     esi.text:0041340A                 pop     ebx.text:0041340B                 add     esp, 0C0h.text:00413411                 cmp     ebp, esp.text:00413413                 call    j___RTC_CheckEsp.text:00413418                 mov     esp, ebp.text:0041341A                 pop     ebp.text:0041341B                 retn.text:0041341B ?calling_convention@@YAXXZ endp

经常看到游戏里面的代码 mov edx,xxx 、mov ecx,xxxx 然后call xxxx 原来是fastcall参数来的。

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