From: avly AT castle DOT net (An)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem when assembling external function using "asmdefs.h"
Date: Tue, 08 Oct 1996 00:05:53 GMT
Organization: The Castle Network, http://www.castle.net
Lines: 67
Message-ID: <53c68b$28g@arther.castle.net>
References: <Pine DOT HPP DOT 3 DOT 95 DOT 961007232355 DOT 1559A-100000 AT helios DOT usq DOT edu DOT au>
Reply-To: avly AT castle DOT net
NNTP-Posting-Host: bridge49.castle.net
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Matthew B Kennedy <q9522772 AT helios DOT usq DOT edu DOT au> wrote:

>Hello.  I've finished reading the AS assembler tutorial/guide, so
>I tried making a simple program in assembler (to be linked with C).

>The exact files and compile commands I have used are below.  As you 
>can see, I am using the "asmdefs.h" file to be able access the FUNC, 
>ENTER and LEAVE macros.  The problem is, the assembler spits-chips 
>when it comes across the FUNC macro (see the compilation result).


>Thanks in advance, 
>Matthew

>===== ADD.C ============================
>extern int _addint(int a, int b);

>void main(void)
>{
>  int a, b, c;
>  c = _add_int(a,b);
^^^^^^^^^^^^^^^^^
  c = _addint( a, b );

>  printf("%d+%d=%d\n",a,b,c);
>}

>===== ADD.S ============================
>#include "libc/asmdefs.h"
^^^^^^^^^^^^^^^^^^^^^
#include <libc/asmdefs.h>

>.file "add.c"
^^^^^^^^^^^^^
.file "add.s"

>.text
>  .align 4
>  FUNC(__addint)
>  ENTER
>    movl ARG1, %eax
>    addl ARG2, %eax
>  LEAVE

>===== COMPILATION COMMANDS ============
>[1] C:\DJGPP >gcc add.c add.s -o add
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
gcc add.S add.c -o add.exe

>add.s: Assembler messages:
>add.s:6: Error: invalid character '(' in opcode
>add.s:7: Error: operands given don't match any known 386 instruction

>=======================================

>(Line 6 corresponds to the FUNC(__addint) line)

Also, it might be a good idea to use a different name instead of
"add.s" for the asm module, since you already have "add.c", and it
could be confused with the asm source generated from "add.c".

Cheers,
An
http://remus.rutgers.edu/~avly/djgpp.html