C ++ visual studio内联汇编如何调用地址 [英] C++ visual studio inline assembly how do I call an address

问题描述

我遇到的问题是我正在尝试在Inline Asm中执行以下操作



asd是地址



调用asd



在十六进制编辑器中查看时，它会写入call dword ptr asd



我很遗失



我尝试了什么：



到目前为止我在内联装配中尝试过使用两件东西



呼叫偏移量asd



打电话给asd



两个都没有工作，我错过了什么，我无法弄清楚如何去做这个

The problem that i'm having is that I'm trying to do the following in Inline Asm

asd is the address

"call asd"

When viewing it in a hex editor it writes "call dword ptr asd"

I'm quite lost

What I have tried:

I've tried using two things so far in the inline assembly

"call offset asd"

"call asd"

Neither work, I'm missing something and I cant figure out how to go about this

推荐答案

当我不确定汇编代码指令时，我用C或C ++编写一段代码，然后查看汇编代码清单。我这样做了。这段代码有一个简单的函数和一个调用它的指针。这是汇编代码清单：

When I am uncertain about the assembly code instructions, I write a snippet of code in C or C++ and then look at the assembly code listing. I did that with this. This code has a simple function and a pointer to it which is called. Here is the assembly code listing :

?DoFunctionTest@@YAXXZ PROC				; DoFunctionTest
; 237  : {

LN3：
push rdi
sub rsp， 64 ; 00000040H
mov rdi，rsp
mov ecx， 16
mov eax， - 858993460 ; ccccccccH
rep stosd

; 238 ： double x = 16 。< span class =code-digit> 612 ;

movsd xmm0，QWORD PTR __real @ 40309cac083126e9
movsd QWORD PTR x

LN3: push rdi sub rsp, 64 ; 00000040H mov rdi, rsp mov ecx, 16 mov eax, -858993460 ; ccccccccH rep stosd ; 238 : double x = 16.612; movsd xmm0, QWORD PTR __real@40309cac083126e9 movsd QWORD PTR x

[rsp]，xmm0

; 239 ：dblfunc df = factor; // factor是函数，df是指向它的指针

lea rax，OFFSET FLAT：？fac @@ YANN @ Z; fac
mov QWORD PTR df

[rsp], xmm0 ; 239 : dblfunc df = factor; // factor is the function, df is a pointer to it lea rax, OFFSET FLAT:?fac@@YANN@Z ; fac mov QWORD PTR df

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