学步园

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<br /> .model flat, stdcall<br /> option casemap :none<br /> include windows.inc<br /> include user32.inc<br /> include kernel32.inc<br /> include masm32.inc<br /> include gdi32.inc<br /> includelib gdi32.lib<br /> includelib user32.lib<br /> includelib kernel32.lib<br /> includelib masm32.lib<br /> include macro.asm<br /> .data<br /> szTitle db 'Title',0<br /> szMessage db 'Hello World',0<br /> .code<br /> START:<br /> ;1.push and call<br /> push MB_OK or MB_ICONINFORMATION<br /> push offset szTitle<br /> push offset szMessage<br /> push NULL<br /> call MessageBox<br /> ;2.invoke伪指令<br /> ;invoke MessageBox,NULL,offset szMessage,offset szTitle,MB_OK or MB_ICONINFORMATION<br /> invoke ExitProcess,0<br /> end 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。