🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.lang.asm.x86
Article #91

Re: DOSSEG and TLINK

#91
From: Bob Smith
Date: Sun, 16 May 1999 00:00
103 lines
3885 bytes
Good question!  I traced through my linker (QLINK) to see why the
segment order isn't what you think it should be and found an easily
fixed bug which is also in MS Link (possibly for a different reason). 
Thanks for pointing it out.

assassin17@rocketmail.com wrote:
> 
>   bsmith@sudleyplacedespam.com wrote:
> > assassin17@rocketmail.com wrote:
> [snip]
> > > 1. All segments with a class name ending in CODE
> > > 2. Far data segments (segments outside DGROUP)
> > > 3. Near data (DGROUP) segments, in the following order:
> > >       a. Segments of class BEGDATA (reserved for Microsoft use)
> > >       b. Any segments not of class BEGDATA, BSS, or STACK
> > >       c. Segments of class BSS
> > >       d. Segments of class STACK
> > >
> > > however, TLINK seems to always put segments with class 'STACK' at
> the
> > > end, even if they're _not_ in DGROUP.  MASM's LINK behaves according
> to
> > > the above list.  is there any standard to how other linkers handle
> > > DOSSEG, or can they arrange the different classed segments however
> they
> > > want?
> >
> > The standard is the set of rules you mentioned above.  TLINK just
> > doesn't observe them.
> 
> thanks for the reply.  heh, i guess this explains why TLINK 7.1.30.1
> just ignores DOSSEG..
> 
> > > ----------
> > > DOSSEG
> > >
> > > DGROUP GROUP OERP,AAAA,xaaa,LOPE,FBSS,DARK
> > >
> > > xaaa SEGMENT 'CODE'
> > > xaaa ENDS
> > >
> > > CBF SEGMENT
> > > CBF ENDS
> > >
> > > FBSS SEGMENT 'DATA'
> > > FBSS ENDS
> > >
> > > LOSER SEGMENT 'STACK'
> > > LOSER ENDS
> > >
> > > ztr SEGMENT 'DATA'
> > > ztr ENDS
> > >
> > > aab SEGMENT 'BSS'
> > > aab ENDS
> > >
> > > OERP SEGMENT 'BEGDATA'
> > > OERP ENDS
> > >
> > > AAAA SEGMENT 'ARPA'
> > > AAAA ENDS
> > >
> > > LOPE SEGMENT 'STACK'
> > > LOPE ENDS
> > >
> > > ZZZU SEGMENT 'ARPA'
> > > ZZZU ENDS
> > >
> > > DARK SEGMENT 'CODE'
> > > DARK ENDS
> > >
> > > END
> > > -----
> [snipped a lot]
> > According to the rules, the correct order (for the original segments)
> is
> > as follows:
> >
> > Name  Class   Rule
> > --------------------
> > xaaa  CODE    1
> > DARK  CODE    1
> > CBF           2
> > ztr   DATA    2
> > LOSER STACK   2
> > aab   BSS     2
> > ZZZU  ARPA    2
> > OERP  BEGDATA 3a
> > FBSS  DATA    3b
> > AAAA  ARPA    3b
> > LOPE  STACK   3d
> > _________________________________________
> 
> ok, QLINK and M$ LINK both do it right then.  hmm.. why does ztr end up
> before LOSER, even thought it's after it in the source file?  is it
> because FBSS is in the same class as ztr, and it's before LOSER in the
> code?
_________________________________________
Bob Smith -- bsmith@sudleyplacedespam.com
a.k.a.       bsmith@qualitasdespam.com

I've been getting a lot of junk e-mail lately,
so to reply to me directly, delete "despam".
Technical Details
Message-ID: <7hnfm3$i3u$1@autumn.news.rcn.net>
Path: arc1-ca.pugleaf.net!unknown!not-for-mail
References: <7hg7kq$ksb$1@autumn.news.rcn.net> <7hih7k$8vb$2@autumn.news.rcn.net> <7hnajq$jfn$1@autumn.news.rcn.net>

Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: feaef,dda8022d1c19bc63
X-Google-Attributes: gidfeaef,public
X-Google-Thread: f7d8d,dda8022d1c19bc63
X-Google-Attributes: gidf7d8d,public
X-Google-Thread: 114917,dda8022d1c19bc63
X-Google-Attributes: gid114917,public
From: Bob Smith <jsmith98@frontiernet.net>
Subject: Re: DOSSEG and TLINK
Date: 1999/05/16
Message-ID: <7hnfm3$i3u$1@autumn.news.rcn.net>
X-Deja-AN: 478601493
Content-Transfer-Encoding: 7bit
Approved: <johnfine@erols.com>
References: <7hg7kq$ksb$1@autumn.news.rcn.net> <7hih7k$8vb$2@autumn.news.rcn.net> <7hnajq$jfn$1@autumn.news.rcn.net>
X-Accept-Language: en
Content-Type: text/plain; charset=us-ascii
X-Mozilla-Status: 0801
X-Complaints-To: abuse@rcn.com
X-Trace: /FK6E8Dw4eEvfBXJ1hHYWP+ueb92kiOoZUOmrZSWI/w=
Organization: Qualitas, Inc.
Mime-Version: 1.0
Reply-To: bsmith@sudleyplacedespam.com
NNTP-Posting-Date: 16 May 1999 22:09:07 GMT
Newsgroups: comp.lang.asm.x86,borland.public.tasm,alt.lang.asm