Hello everyone,

I decided yesterday to start doing assembler. Most of it is okay (well, as okay as assembler can be), but I'm getting some problems with gas.

It seems that I can call functions only once. After that, any subsequent call opcode with the same function name will fail. I must be doing something terribly wrong, though I can't see what.

Take this small C function for instance:

void path_free(path_t path)
{
    if (path == NULL) return;

    free(((point_list_t*)path)->points);
    free(path);
}

I "translated" it to assembler like that:

.globl _path_free
_path_free:
    push    rbp
    mov     rbp, rsp
    cmp     rdi, 0
    jz      byebye

    push    rdi
    mov     rdi, qword ptr [rdi]
    call    _free
    pop     rdi
    sub     rsp, 8
    call    _free

 byebye:
    leave
    ret

This triggers the following error for the second call _free: suffix or operands invalid for ``call''. And if I change it to something else, like free2, everything works (until link time, that is).

Assembler code gcc -S gave me looks very similar to what I've done (except it's in AT&T syntax), so I'm kind of lost.

I'm doing this on Mac OS X under the x86_64 architecture.