disable name mangling of imported functions

[Dav92]

Hi,

I just got problems with a couple of functions, I need to use from an extern dll.
If I prototype the function as following: int xxxxy();
I can use it as I wish, but I won't get an error if I acidently call it with the wrong number of arguments.
If my protype looks like following: int xxxxy(DWORD*,DWORD,DWORD);
Then the linker complains since it looks for _xxxxy@12, but since I only have the lib and there the function is declared as _xxxxy the linker can't find it.

Is there a compiler-option for disabling this name mangling?


Thanks in advance

[MichaelW]

Have you tried the /Gm option?

[Vortex]

Hi Dav92,

You can recreate the import library without decorated names :

Code Select Expand

/NOUND             Don't add underscore to import names

[Dav92]

Have you tried the /Gm option?

Thanks, that indeed solved the problem. But created another one. The windows api functions use the standard nameing conventions, so is there a way to use the /Gm only for specific functions?

You can recreate the import library without decorated names

Thanks, but the underscores aren't the problem. The problem is the @.. The lib got created without knowing the number of args or the calling convention for the functions.

[Vortex]

Hi Dav92,

Another solution would be to recreate the same library with decorated symbols. Could you post the exact list of functions with the number of parameters?

[Dav92]

That's the problem. most of the functions I haven't used so far, so I don't know the parameters of them.

But since I wrote myself the def-file I can easily recreate the lib if I use a new function with the number of parameters.
I'll write a small batch-file for creating the lib and then just recreate it everytime I use a new function

[Vortex]

Hi Dav92,

The code below is not a perfect solution but it seems to work :

Code Select Expand


extern int MessageBoxA();

int __stdcall MessageBox(int x,char *y,char *w,int z)
{
    int temp;

__asm{
push  z
mov   eax,w
push  eax
mov   eax,y
push  eax
push  x
call  MessageBoxA
mov   temp,eax
}

    return temp;
}


int __stdcall WinMain(int hInstance, int hPrevInstance,char *lpCmdLine, int nCmdShow)
{
    MessageBox(0,"Undecorated function call","Hello",0);
    return 0;
}


[Dav92]

Yes, that would work, but would be too much work^^

I think I'll just stick with recreating the lib every time I use a new function.