链接到KERNEL32.LIB汇编 [英] Linking to Kernel32.lib in assembler

问题描述

我开始学习今天的组装和已经跑在Linux上的许多测试，效果很不错！我搬到了我的电脑，并开始尝试在这里写一些。当试图调用外部函数（这再次，精细的工作在Linux上），我会得到LINK 2001年未解决的外部错误，告诉我​​，WriteConsoleA与NASM编译后没有定义时，我遇到了一个问题：

I started learning assembly today and have ran many tests on linux that worked very well! I moved over to my PC and started to attempt to write some here. I ran into a problem when attempting to call external functions (which again, worked fine on linux) where I would get LINK 2001 Unresolved External errors telling me that WriteConsoleA is not defined when after compiling with nasm:

nasm -f win32 test.asm -o test.obj

和与cl.exe时：

cl test.obj /link libcmt.lib kernel32.lib

我得到这些错误：

I get these errors:

test.obj : error LNK2001: unresolved external symbol ExitProcess
test.obj : error LNK2001: unresolved external symbol GetStdHandle
test.obj : error LNK2001: unresolved external symbol WriteConsoleA
test.exe : fatal error LNK1120: 3 unresolved externals

大会：

extern ExitProcess, GetStdHandle, WriteConsoleA
NULL equ 0
STD_OUTPUT_HANDLE equ -11
section .data
   msg db "Hello world!",0xa
msgLen equ $-msg
section .bss
    dummy resd 1
section .text
    global _main
_main:
    push STD_OUTPUT_HANDLE
    call GetStdHandle
    push NULL
    push dummy
    push msgLen
    push msg
    push eax
    call WriteConsoleA
    push NULL
    call ExitProcess

从<复制的几乎一模一样

href=\"http://stackoverflow.com/questions/12574924/hello-world-using-nasm-in-windows-assembly\">here.
任何帮助深表AP preciated！谢谢！

Copied almost exactly from here. Any help is much appreciated! Thanks!

推荐答案

首先，CL不是一个链接，但一个编译器。为什么不使用GoLink为您链接到后显示我？这是很容易使用。您可以使用LD作为连接器，但你的实习医生会改变一点。

First off, cl is not a linker but a compiler. Why not just use GoLink as I shown in the post you linked to? It is much easier to use. You could use ld as the linker, but your externs will change a bit.

Windows API函数使用的函数名的装饰 - 下划线+ FunctionName + @sizeof参数，这是一个连接东西

Windows API functions use function name decorations - an underscore + FunctionName + @sizeof parameters, this is a linker thing.

所以，ExitProcess的是真正导出为_ExitProcess @ 4，因为它需要1 DWORD参数。 WriteConsoleA需要5个参数DWORD大小，所以这将是_WriteConsole @ 20

So, ExitProcess is really exported as _ExitProcess@4 since it takes 1 DWORD parameter. WriteConsoleA takes 5 parameters DWORD sized, so it would be _WriteConsole@20

更改code为：

extern _ExitProcess@4, _GetStdHandle@4, _WriteConsoleA@20

%define ExitProcess _ExitProcess@4
%define GetStdHandle _GetStdHandle@4
%define WriteConsoleA _WriteConsoleA@20

NULL equ 0
STD_OUTPUT_HANDLE equ -11
section .data
   msg db "Hello world!",0xa   
msgLen equ $-msg

section .bss
    dummy resd 1

section .text
    global _main
_main:
    push STD_OUTPUT_HANDLE
    call GetStdHandle

    push NULL
    push dummy
    push msgLen
    push msg
    push eax
    call WriteConsoleA

    push NULL
    call ExitProcess

要使用ld链接，告诉它的lib目录是一个不错的选择是：
-LC：\\ Program Files文件\\微软的SDK \\ WINDOWS \\ V6.0 \\ Lib文件

To link with ld, tell it where the lib directory is, a good bet is: -L "C:\Program Files\Microsoft SDKs\Windows\v6.0\Lib"

然后就用 -l <​​/ code>标志与图书馆
-l KERNEL32

then just use the -l flag with the library -l kernel32

使用NASM和LD为您的样品code我生成文件：

My makefile using NASM and ld for your sample code:

APP= Sample

all: $(APP) clean

$(APP): $(APP).obj
    "C:\MinGW\bin\ld" $(APP).obj -o $(APP).exe -L "C:\Program Files\Microsoft SDKs\Windows\v6.0\Lib" -l kernel32

$(APP).obj: $(APP).asm
    nasm -f win32 $(APP).asm -o $(APP).obj

clean:
    rm $(APP).obj

如果你在其他职位使用GoLink作为，你可以只当它们出现在文档中使用的API函数名。

If you were to use GoLink as in the other post, you could just use the API Function names as they appear in the docs.

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