内联汇编，误差

Question

我得到这个错误：

Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.

我不知道如何解决这个问题，谁能帮助我？

我的代码是：

#include "common.h" 

char* file = "c:\\town.las"; 
char* file_mode = "r"; 


#pragma pack(1) 
struct LASHEADER 
{ 
    char LASF[4]; 
}; 


void main() 
{ 
    LASHEADER lasHeader; 
    FILE* of; 

    __asm 
    { 
      push ebp  


      mov  eax, file_mode 
      push eax 
      push file 
      call fopen 
      mov of, eax 

      mov esi, esp 
      mov eax, DWORD PTR of 
      push eax 
      push 1 
      push 4 // this should be sizeof LASHEADER 

      lea ecx, DWORD PTR lasHeader 
      push ecx 

      call DWORD PTR fread 
      add esp, 16 
      cmp esi, esp 



      mov eax, of 
      push eax 
      call fclose 


    } 
} 

我如何能做到什么要求？我试图在没有运气的情况下推动ebp和流行音乐。

Answer 1

该错误说明究竟出了什么问题。在函数调用之后，您并不一致地恢复堆栈指针。这看起来像VC输出。您应该编译一个小程序，调用fopen,fread和fclose以查看堆栈已完成的操作。在返回之前，每个函数参数push必须与添加到esp的4个字节相匹配。

这里是在什么工作猜测：

 push ebp  

     push file_mode ; 1 word 
     push file  ; 2 words 
     call fopen 
     mov of, eax  ; this could be wrong depending on compiler 

     mov esi, esp 
     mov eax, DWORD PTR of 
     push eax ; 3 words 
     push 1 ; 4 words 
     push 4 ; 5 words 

     lea ecx, DWORD PTR lasHeader 
     push ecx ; 6 words 

     call DWORD PTR fread 

     mov eax, of ; again could be wrong depending on compiler 
     push eax ; 7 words 
     call fclose 

     add esp, 28 ; REMOVE 7 words from the stack 

     pop ebp