Turbo C Fixup Error
 

Hi,

Im writing a program in Turbo C but i also want to use some assembly functions, for this im using nasm.

This is my assembly code:

BITS 16



GLOBAL _Add4



n_Add4 equ 4



_Add4:

        push bp

        mov bp,sp

        

        mov ax, [bp + n_Add4]

        add ax, 4

        

        mov sp,bp

        pop bp

        ret

And here is my Turbo C code:

extern int Add4(int);



void main() {

        int n;

        n = Add4(77);

}

Im linking this way:

nasm -o asmmodule.obj -f obj asmmodule.asm
tcc -mt -c cmodule.c
tlink cmodule.obj asmmodule.obj

But tlink gives me the following error:

Fixup overflow in module CMODULE.C at _TEXT:000B, target = _ADD4

Anyone knows how to fix this?

Re: Turbo C Fixup Error
 

Seems to be a common problem, only explained in some usenet news threads.

You don't seem to have any segments declared in your ASM code.

Try putting this just above your assembly function definition:

SEGMENT _TEXT PUBLIC CLASS=CODE USE16 ALIGN=16

In addition, I'd suggest putting the following above your single variable declaration:

SEGMENT data

For a more thorough discussion, search "google groups" (USENET news, really) with the following query:

nasm "Fixup overflow" borland

The thread I'm referring to has the following subject:

Help linking a (trivial) NASM object file (.obj) with Borland C++ 3.0

Nice to know that others are still playing with Borland C for DOS + NASM, just like I do :-))