Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!ncar!mephisto!gatech!galbp!gisatl!david
From: david@gisatl.FIDONET.ORG (David Deitch)
Newsgroups: comp.os.msdos.programmer
Subject: Calling .ASM from .C ?
Message-ID: <149.26C35F87@gisatl.FIDONET.ORG>
Date: 11 Aug 90 01:19:55 GMT
Organization: Galaxy Information System (GIS) 1:133/411 Atlanta, Ga
Lines: 78

In a message of <Aug 08 22:46> Thomas Dwyer III (TOMIII@MTUS5.BITNET ) 
writes:

     Let me preface this by saying that I work with MSC not Turbo C, 
but I believe it will still hold true.


 > TEST.C
 > ------

 > extern hello();

 > main()
 > {
 >        hello();
 > }


     Do you need the () on your external declaration?


 > HELLO.ASM
 > ---------

 > _text  segment         public
 >        org             100h
 >        assume          cs:_text,ds:_text

     Why use the org line?  That is supposed to be for when you are 
creating a .COM program, not an object file that will be linked into a 
C program.

 > start:
 >        call            _hello
 >        mov             ax,4c00h
 >        int             21h

 > msg:   db              13,10,"Hello world.",13,10,"$"

     It appears you want to run your program both ways.  I do not 
think you can do this.  It either has to be .COM (start:) or object 
(_hello).

 >        public          _hello
 > _hello proc
 >        mov             ah,9
 >        mov             dx,offset msg
 >        int             21h
 >        ret
 > _hello endp

 > _text  ends
 >        end             start


Try not using the _ in hello.  I do not in MSC.

 > The question is, how to I hack up HELLO.ASM so that I can link it 
with
 > TLINK?  Does my "hello" need to be prefixed in my "extern" 
statement?
 > I tried it both ways.  Any insight on the matter would be most 
 > appreciated.

     I just hope I am semi-accurate.  This is not my forte!

     David Deitch (GIS)
          deitch@gisatl.fidonet.org
               1:133/411@fidonet
 
 


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