试了下GoAsm

在VC里我们：
#include <windows.h>
DWORD    dwNumberOfBytesWritten;
int main() {
  HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
  WriteFile(hStdOut, "Hello World (from GoAsm)", 24, &dwNumberOfBytesWritten, 0);
  return dwNumberOfBytesWritten;
}
某个Windows的头文件里(1. 示意。2. windows.h包含别的头文件):
typedef unsigned int32 DWORD;
#define STD_OUTPUT_HANDLE DWORD(-10)    /* 0xfffffff6 */
HANDLE WINAPI GetStdHandle(DWORD nStdHandle);
typedef const void* LPCVOID;
typedef DWORD* LPDWORD;
BOOL WINAPI WriteFile(HANDLE hFile, LPCVOID lpBuffer, DWORD nNumberOfBytesToWrite,
  LPDWORD lpNumberOfBytesWritten, LPOVERLAPPED lpOverlapped);

新建文本文件2.asm，贴入如下内容：
.DATA
dwnumberofbyteswritten dd 0
lpBuffer db 'Hello world (from goasm)', 0ah
.CODE
    START:
push -11
call GetStdHandle ; get hStdOut in eax
push 0, addr dwnumberofbyteswritten ; lpOverlapped, &dwNumberOfBytesWritten
push 25, addr lpBuffer ; nNumberOfBytesToWrite, lpBuffer
push eax ; hStdOut
call WriteFile
mov eax, [dwnumberofbyteswritten]
ret

再新建文本文件clr.bat (Compile-Link-Run)，贴入:
@ECHO OFF
IF "%~n1" == "" (EXIT/B 1)
SET f=%~n1
GoAsm /l %f%.asm
IF ERRORLEVEL 1 (EXIT/B 2)
GoLink /console /debug dbg %f%.obj kernel32.dll user32.dll
IF ERRORLEVEL 1 (EXIT/B 3)
%f%.exe Hello world (from GoAsm)
ECHO %ERRORLEVEL%

最后clr 2或clr 2.asm，输出：
GoAsm.Exe Version 0.61.0.1 - Copyright Jeremy Gordon 2001-2017 - JG@JGnet.co.uk
Output file: 2.obj
Output file: 2.lst

GoLink.Exe Version 1.0.3.1  Copyright Jeremy Gordon 2002-2020   info@goprog.com
Output file: 2.exe
Format: Win32   Size: 2,560 bytes
Output file: exe\2.dbg
Format: Win32   Size: 395 bytes
Hello world (from goasm)
25

Calling convention. stdcall、cdecl 和pascal简介
被调用者将参数从栈中清除的好处是：想象下有99处调用它，是99处加pop好，还是一处pop好？也省不了多少地方。
C语言支持可变参数数量。被调用者可能接收2个参数，也可能接收4个，堆栈如何pop? 不过我觉得可变参数数量和调用者清栈
没有100%的相关度：多传一个参数表示SP要挪多少不行吗？

LPCVOID的L代表Long，16位时代的遗物，还有叫far的，表示指针是20位还是16位。

函数的返回值在eax里。

CALL/? IF/? EXIT/? 可看到批处理的帮助。

 

写了个MessageBox(命令行)，兴冲冲贴上来，又发现5次里有1次MessageBox出来后，程序不动了。一生气删掉了。痛定思痛，可能是没指定堆栈大小(默认64KB). search(golink stack size)。还有折腾了半天argc, argv, envp后才想起来我们是调用main()的啊。GetCommandLine(). 哦还有search(goasm USES)，USES EDI等插入push和pop edi指令。