nasm and golink create a DLL x86
制作DLL
xxx.asm:
%macro fb 0
push ebp
mov ebp,esp
%endmacro
%macro fa 1
mov esp,ebp
pop ebp
ret %1
%endmacro
section .text
global dllmain
dllmain:
mov eax,1
ret 12
f1:
fb
mov eax,[ebp+8]
add eax,[ebp+12]
fa 8
xxx_link.fil:
; > golink @xxx_link.fil
/entry dllmain
/dll
/exports f1
xxx.obj
>nasm -f win32 xxx.asm
>golink @xxx_link.fil
制作dll后可以看下pe结构，免得的出问题
在x86汇编中调用
将xxx.dll拷贝到asm项目文件中
hello.asm:
extern MessageBoxA
extern ExitProcess
extern f1
section .data
title db "caption.",0
message db "hello world....",0
section .text
global main
main:
push 1
push 2
call f1
push 0
push title
push message
push 0
call MessageBoxA
_exit:
push 0
call ExitProcess
> nasm -f win32 hello.asm
> golink /entry main hello.obj kernel32.dll user32.dll xxx.dll
c++ 显示连接
将xxx.dll拷贝到c++项目文件中
#include <iostream>
#include <Windows.h>
typedef int (CALLBACK* f1_t)(int, int);
f1_t f1;
int main()
{
HMODULE myDLL = LoadLibraryA("xxx.dll");
f1 = (f1_t)GetProcAddress(myDLL, "f1");
if (f1)
printf("%d\n", f1(1, 2)); // 3
else
printf("dll not export f1");
return 0;
}
See also:
