有3个参数组装CMP指令 [英] Assembly cmp instruction that has 3 arguments

问题描述

我通过一些组装code阅读试图找出它做什么（它是一个挑战，所以没有什么恶意的）。
在一行中有下列指令：

I am reading through some assembly code trying to figure out what its doing ( its a challenge so nothing malicious). On a single line there is the following instruction :

CMP D，[EAX]，0DADADADA

cmp d,[eax],0DADADADA

我已经花了年龄，我知道你不能比较3个值，所以我知道0DA ....部分是我错过了什么。我发现了一些文章，我无法找到再次表明，这是事做填补空白的内存，但不知道，任何帮助将是AP preciated。

I have spent ages on Google and cant figure this one out, i know you can't compare 3 values so i know the 0DA.... part is what I'm missing. I found some article that i cannot find again suggesting that this is something to do with filling up blank memory but not sure, any help would be appreciated.

推荐答案

您必须指定要使用的汇编语法;有相当多的品种为86（此可能的是），甚至为别人着想。

You have to specify the assembler syntax you are using; there's quite a number of varieties for the x86 (which this likely is) and even for others.

由于不知道具体的语法，并同意CMP指令不具有3个操作数，我猜D表​​示DWORD [32位]。所以我觉得可能跨pretation是

Not knowing the specific syntax, and agreeing that CMP instructions don't have 3 operands, I'm guessing the "d" means "dword [32 bits]". So I think the likely interpretation is

   "compare  dword operand indirect through eax to hex literal 0DADADADA"

这是一个有效的x86指令。

That is a valid x86 instruction.

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