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Win32汇编数组编程图解

發(fā)布時間：2025/4/14 编程问答 17 豆豆

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1 聲明并初始化數(shù)組

運行如下；

2 使用dup偽指令

.386 .model flat, stdcall option casemap :noneinclude S:\masm32\include\windows.inc include S:\masm32\include\user32.inc include S:\masm32\include\kernel32.inc include S:\masm32\include\gdi32.inc includelib S:\masm32\lib\user32.lib includelib S:\masm32\lib\kernel32.lib includelib S:\masm32\lib\gdi32.lib include S:\masm32\include\masm32.inc include S:\masm32\include\debug.inc includelib S:\masm32\lib\masm32.lib includelib S:\masm32\lib\debug.lib.data;聲明有三個元素的 DWORD 數(shù)組, 并把每個元素初始化為 7arr1 dd 3 dup(7);聲明有三個元素的 DWORD 數(shù)組, 無初始化; 對全局變量, 沒有初始化的將用 0 填充arr2 dd 3 dup(?) .data?;聲明有三個元素的 DWORD 數(shù)組arr3 dd 3 dup(?).code start:DumpMem offset arr1, 12 ;07 00 00 00 - 07 00 00 00 - 07 00 00 00DumpMem offset arr2, 12 ;00 00 00 00 - 00 00 00 00 - 00 00 00 00DumpMem offset arr3, 12 ;00 00 00 00 - 00 00 00 00 - 00 00 00 00ret end start

?運行如下；

3?未初始化的變量在 .data 段和 .data? 的區(qū)別

.386 .model flat, stdcall option casemap :noneinclude S:\masm32\include\windows.inc include S:\masm32\include\user32.inc include S:\masm32\include\kernel32.inc include S:\masm32\include\gdi32.inc includelib S:\masm32\lib\user32.lib includelib S:\masm32\lib\kernel32.lib includelib S:\masm32\lib\gdi32.lib include S:\masm32\include\masm32.inc include S:\masm32\include\debug.inc includelib S:\masm32\lib\masm32.lib includelib S:\masm32\lib\debug.lib.datav1 dd 4096 dup(?) ;未初始化變量在 .data 段, 生成的 exe 文件會根據(jù)大小分配內(nèi)存 .code start:PrintText '.data dup(?) !!! 'ret end start .386 .model flat, stdcall option casemap :noneinclude S:\masm32\include\windows.inc include S:\masm32\include\user32.inc include S:\masm32\include\kernel32.inc include S:\masm32\include\gdi32.inc includelib S:\masm32\lib\user32.lib includelib S:\masm32\lib\kernel32.lib includelib S:\masm32\lib\gdi32.lib include S:\masm32\include\masm32.inc include S:\masm32\include\debug.inc includelib S:\masm32\lib\masm32.lib includelib S:\masm32\lib\debug.lib.data?v1 dd 4096 dup(?) ;未初始化變量在 .data? 段 .code start:PrintText '.data? dup(?) !!!'ret end start

此二程序運行如下；

主要看一下exe大小的區(qū)別；?

c10和c11的exe大小相差16k，4096*4 個字節(jié)；

結(jié)論：不需要初始化的變量應(yīng)該聲明在 .data? 段；

4 嵌套數(shù)組

運行如下；?

手工構(gòu)建過程如下；

總結(jié)

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