内联汇编语言 [英] Inline assembly language

问题描述

我做的64位移民，我需要口内联汇编code为他code

I am doing 64 bit migration and i need to port inline assembly code to cpp Here is he code

void ExternalFunctionCall::callFunction(ArgType resultType, void* resultBuffer)
{
    // I386

    // just copy the args buffer to the stack (it's already layed out correctly)
    int* begin = m_argsBegin;
    int* ptr = m_argsEnd;
        while (ptr > begin) {
            int val = *(--ptr);
            __asm push val
        }
    }

我要迁移此__asm​​推到V​​AL CPP。这个函数被调用四次，每次调用我们得到m_argsBegin和m_argsEnd（包括m_argsBegin和m_argsEnd是动态数组）的不同值。
这个while循环执行4次，这种callFunction功能的每次呼叫。所以，在4×4总量= 16的值存储在一个连续存储位置这是什么推__asm​​ VAL做我猜。我需要用C实现此++。我试图百般（堆栈，数组，Lnked名单，甚至排队分离到一个单独的asm文件这一点，但没有一个是工作）
谁能帮助？

I want to migrate this __asm push val to cpp. This function is called four times and for every call we get different values of m_argsBegin and m_argsEnd(both m_argsBegin and m_argsEnd are dynamic arrays). This while loop executes 4 times for every call of this "callFunction" function. So, in total 4x4 = 16 values are to be stored in a "CONTINUOUS memory location" this is what "__asm push val" does i guess. I need to implement this in c++ . I tried every possible way (stack, array, Lnked list, Queue even separated this into a separate asm file but none are working) Can anyone help?

我分开这个内联汇编函数转换成一个单独的程序文件。这里是code：

I separated this inline assembly function into a separate assembly file . Here is the code:

.386
 .model c,flat
  public callFunction_asm

CSEG segment public 'CODE'

 callFunction_asm PROC
    push ebp
    mov ebp, esp 
    mov ecx, [ebp+8] ;val
    push dword ptr [ecx]
    mov esp, ebp
    pop ebp
 RETN
 callFunction_asm ENDP
CSEG ends
END

其中callFunction_asm是一个外部函数，我宣布它为：

where callFunction_asm is an extern function , I declared it as:

为externC
无效callFunction_asm（INT VAL）;

extern "C" void callFunction_asm(int val);

和我调用这个函数为：

while (ptr > begin) {
        int val = *(--ptr);
        callFunction_asm(val); //possible replacement
    }

但即使这是行不通的，谁能告诉我该怎么错在何处。我是新装配的编码。

but even this is not working, can anyone tell where am I going wrong. I am new to assembly coding.

推荐答案

推把堆栈上的操作，以及递减堆栈指针。

push puts its operand on the stack, as well as decrementing the stack pointer.

如果你看了堆栈指针加1（ 1（SP $）），你应该看到的值（但如果你想回来，你通常会使用弹出）。

If you looked at the stack pointer plus 1 (1($sp)), you should see the value (but if you wanted it back, you'd typically use pop).

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