Linking functions from .ASM file

[knutso]

Hello.
I've got to link some functions from an assembly file, but i can't seem to make it work. I'm using Watcom IDE 11.0(c compiler/assembler). Here's an example of how i do it:

// Prototype
extern void _inton(void);

// asm code
.model large,c
.code
_inton proc
sti
ret
_inton endp
end

When i try to compile it, i get an undefined reference.
I don't understand why?

[master5001]

I think watcom was one of those stupid compilers that forced to link assembly code and c code while compiling them. My first suggestion would be get a new compiler. My more realistic suggestion would be to compile the .asm and .c at the same time. I notice that your assembler code is 16bit and doesn't do much. Watcom isn't win32 only is it?

[Nick]

Every assembler has a different syntax for this
but are you making sure the label is global. On gas
you would do
.globl _inton

[knutso]

What i want to do, is to turn off the interrupts, and then enable them again when i'm done. Here's the assembly code:

.model large,c
.code

_inton proc
        sti
        ret
_inton endp

_intoff proc
        pushf
        pop ax
        cli
        ret
_intoff endp

_intrst proc flag:word
        mov ax,flag
        push ax
        popf
        ret
_intrst endp

_nop proc
        ret
_nop endp
end

And then the C prototype(The compiler adds the underscore prefix, tried several variants of this):

extern unsigned short cdecl intoff();

When i try to use any of the assembly functions, i get the following errors:
Error! E2028: _intoff is an undefined reference
file com.obj(C:\_src\cpp\Test\com.c): undefined symbol _intoff

Any suggestions/other compilers/assemblers i could try?

[Fordy]

I've never worked with Watcom, but I have use MASM with VC++...

The gotcha that was giving me problems was that MASM defaulted to STDCALL and VC++ defaulted to the C calling convension..as soon as I declared the external func with the proper calling conevnsion, it worked....

No idea though if this relates at all to what your doing........

[knutso]

The assembly functions had to be declared public:

public	__inton
__inton proc