win32 asm Hello World Demo

 

编译和链接选项

ml.exe /c /coff /nologo /Fo

link.exe /SUBSYSTEM:WINDOWS /nologo /OUT

 

Hello World Demo Compiled with MASMPlus

 

 

.386.model flat, stdcalloption casemap :noneinclude windows.incinclude user32.incinclude kernel32.incinclude masm32.incinclude gdi32.incincludelib gdi32.libincludelib user32.libincludelib kernel32.libincludelib masm32.libinclude macro.asm.dataszTitle db 'Title',0szMessage db 'Hello World',0.codeSTART:;1.push and callpush MB_OK or MB_ICONINFORMATIONpush offset szTitlepush offset szMessagepush NULLcall MessageBox;2.invoke伪指令;invoke MessageBox,NULL,offset szMessage,offset szTitle,MB_OK or MB_ICONINFORMATIONinvoke ExitProcess,0end START

此段反汇编结果：程序入口点在0x401000，先是4个push，然后是call MessageBoxA

返回值到EAX，为ID_OK=1,从图中寄存器可见。