freepascal.compiler/compiler/targets/t_nwm.pas

{
    $Id$
    Copyright (c) 1998-2000 by Peter Vreman

    This unit implements support import,export,link routines
    for the (i386) Netware target

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    First Implementation 10 Sept 2000 Armin Diehl

    Currently generating NetWare-NLM's only work under Linux. This is
    because nlmconf from binutils does not work with i.e. win32 coff
    object files. It works fine with ELF-Objects.

    The following compiler-swiches are supported for NetWare:
    $DESCRIPTION    : NLM-Description, will be displayed at load-time
    $M              : For Stack-Size, Heap-Size will be ignored
    $VERSION x.x.x  : Sets Major, Minor and Revision

    Sorry, Displaying copyright does not work with nlmconv from gnu bunutils.

    Exports will be handled like in win32:
    procedure bla;
    begin
    end;

    exports bla name 'bla';

    Without Name 'bla' this will be exported in upper-case.

    The path to the import-Files (from netware-sdk, see developer.novell.com)
    must be specified by the library-path. All external modules are defined
    as autoload.

    i.e. Procedure ConsolePrintf (p:pchar); cdecl; external 'clib.nlm';
    sets IMPORT @clib.imp and MODULE clib.

    If you dont have nlmconv, compile gnu-binutils with
       ./configure --enable-targets=i386-linux,i386-netware
       make all

    Debugging is currently only possible at assembler level with nwdbg, written
    by Jan Beulich. Nwdbg supports symbols but it's not a source-level
    debugger. You can get nwdbg from developer.novell.com. To enter the
    debugger from your program, define "EnterDebugger" as external cdecl and
    call it. Int3 will not work with Netware 5.

    A sample program:

    Program Hello;
    (*$DESCRIPTION HelloWorldNlm*)
    (*$VERSION 1.2.2*)
    (*$M 8192,8192*)
    begin
      writeLn ('hello world');
    end.

    compile with:
    ppc386 -Tnetware hello

    ToDo:
      - No duplicate imports and autoloads
      - Screen and Thread-Names

****************************************************************************
}
unit t_nwm;

{$i defines.inc}

interface


implementation

  uses
    cutils,
    verbose,systems,globtype,globals,
    symconst,script,
    fmodule,aasm,cpuasm,cpubase,symsym,
    import,export,link;

  type
    timportlibnetware=class(timportlib)
      procedure preparelib(const s:string);override;
      procedure importprocedure(const func,module:string;index:longint;const name:string);override;
      procedure importvariable(const varname,module:string;const name:string);override;
      procedure generatelib;override;
    end;

    texportlibnetware=class(texportlib)
      procedure preparelib(const s : string);override;
      procedure exportprocedure(hp : texported_item);override;
      procedure exportvar(hp : texported_item);override;
      procedure generatelib;override;
    end;

    tlinkernetware=class(tlinker)
    private
      Function  WriteResponseFile(isdll:boolean) : Boolean;
    public
      constructor Create;override;
      procedure SetDefaultInfo;override;
      function  MakeExecutable:boolean;override;
    end;


{*****************************************************************************
                               TIMPORTLIBNETWARE
*****************************************************************************}

procedure timportlibnetware.preparelib(const s : string);
begin
end;


procedure timportlibnetware.importprocedure(const func,module : string;index : longint;const name : string);
begin
  { insert sharedlibrary }
  current_module.linkothersharedlibs.add(SplitName(module),link_allways);
  { do nothing with the procedure, only set the mangledname }
  if name<>'' then
    aktprocsym.definition.setmangledname(name)
  else
    message(parser_e_empty_import_name);
end;


procedure timportlibnetware.importvariable(const varname,module:string;const name:string);
begin
  { insert sharedlibrary }
  current_module.linkothersharedlibs.add(SplitName(module),link_allways);
  { reset the mangledname and turn off the dll_var option }
  aktvarsym.setmangledname(name);
  exclude(aktvarsym.varoptions,vo_is_dll_var);
end;


procedure timportlibnetware.generatelib;
begin
end;


{*****************************************************************************
                               TEXPORTLIBNETWARE
*****************************************************************************}

procedure texportlibnetware.preparelib(const s:string);
begin
end;


procedure texportlibnetware.exportprocedure(hp : texported_item);
var
  hp2 : texported_item;
begin
  { first test the index value }
  if (hp.options and eo_index)<>0 then
   begin
     Comment(V_Error,'can''t export with index under netware');
     exit;
   end;
  { use pascal name is none specified }
  if (hp.options and eo_name)=0 then
    begin
       hp.name:=stringdup(hp.sym.name);
       hp.options:=hp.options or eo_name;
    end;
  { now place in correct order }
  hp2:=texported_item(current_module._exports.first);
  while assigned(hp2) and
     (hp.name^>hp2.name^) do
    hp2:=texported_item(hp2.next);
  { insert hp there !! }
  if assigned(hp2) and (hp2.name^=hp.name^) then
    begin
      { this is not allowed !! }
      Message1(parser_e_export_name_double,hp.name^);
      exit;
    end;
  if hp2=texported_item(current_module._exports.first) then
    current_module._exports.insert(hp)
  else if assigned(hp2) then
    begin
       hp.next:=hp2;
       hp.previous:=hp2.previous;
       if assigned(hp2.previous) then
         hp2.previous.next:=hp;
       hp2.previous:=hp;
    end
  else
    current_module._exports.concat(hp);
end;


procedure texportlibnetware.exportvar(hp : texported_item);
begin
  hp.is_var:=true;
  exportprocedure(hp);
end;


procedure texportlibnetware.generatelib;
var
  hp2 : texported_item;
begin
  hp2:=texported_item(current_module._exports.first);
  while assigned(hp2) do
   begin
     if not hp2.is_var then
      begin
{$ifdef i386}
        { place jump in codesegment }
        codeSegment.concat(Tai_align.Create_op(4,$90));
        codeSegment.concat(Tai_symbol.Createname_global(hp2.name^,0));
        codeSegment.concat(Taicpu.Op_sym(A_JMP,S_NO,newasmsymbol(hp2.sym.mangledname)));
        codeSegment.concat(Tai_symbol_end.Createname(hp2.name^));
{$endif i386}
      end
     else
      Comment(V_Error,'Exporting of variables is not supported under netware');
     hp2:=texported_item(hp2.next);
   end;
end;


{*****************************************************************************
                                  TLINKERNETWARE
*****************************************************************************}

Constructor TLinkerNetware.Create;
begin
  Inherited Create;
end;


procedure TLinkerNetware.SetDefaultInfo;
begin
  with Info do
   begin
     ExeCmd[1]:='nlmconv -T$RES';
     {DllCmd[1]:='ld $OPT -shared -L. -o $EXE $RES';}
     DllCmd[2]:='strip --strip-unneeded $EXE';
   end;
end;


Function TLinkerNetware.WriteResponseFile(isdll:boolean) : Boolean;
Var
  linkres      : TLinkRes;
  i            : longint;
  s,s2         : string;
  ProgNam      : string [80];
  NlmNam       : string [80];
  hp2          : texported_item;  { for exports }
  p            : byte;
begin
  WriteResponseFile:=False;

  ProgNam := current_module.exefilename^;
  i:=Pos(target_info.exeext,ProgNam);
  if i>0 then
    Delete(ProgNam,i,255);
  NlmNam := ProgNam + target_info.exeext;

  { Open link.res file }
  LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);

  p := Pos ('"', Description);
  while (p > 0) do
  begin
    delete (Description,p,1);
    p := Pos ('"', Description);
  end;
  if Description <> '' then
    LinkRes.Add('DESCRIPTION "' + Description + '"');
  LinkRes.Add('VERSION '+tostr(dllmajor)+','+tostr(dllminor)+','+tostr(dllrevision));
  {if nwscreenname = '' then nwscreenname := ProgNam;
  if nwthreadname = '' then nwthreadname := ProgNam;}
  p := Pos ('"', nwscreenname);
  while (p > 0) do
  begin
    delete (nwscreenname,p,1);
    p := Pos ('"', nwscreenname);
  end;
  p := Pos ('"', nwthreadname);
  while (p > 0) do
  begin
    delete (nwthreadname,p,1);
    p := Pos ('"', nwthreadname);
  end;
  p := Pos ('"', nwcopyright);
  while (p > 0) do
  begin
    delete (nwcopyright,p,1);
    p := Pos ('"', nwcopyright);
  end;

  if nwscreenname <> '' then
    LinkRes.Add('SCREENNAME "' + nwscreenname + '"');
  if nwthreadname <> '' then
    LinkRes.Add('THREADNAME "' + nwthreadname + '"');
  if nwcopyright <> '' then
    LinkRes.Add('COPYRIGHT "' + nwcopyright + '"');

  if stacksize > 1024 then
  begin
    str (stacksize, s);
    LinkRes.Add ('STACKSIZE '+s);
  end;

  { add objectfiles, start with nwpre always }
  LinkRes.Add ('INPUT '+FindObjectFile('nwpre',''));

  { main objectfiles }
  while not ObjectFiles.Empty do
   begin
     s:=ObjectFiles.GetFirst;
     if s<>'' then
      LinkRes.Add ('INPUT ' + FindObjectFile (s,''));
   end;

  { output file (nlm) }
  LinkRes.Add ('OUTPUT ' + NlmNam);

  { start and stop-procedures }
  LinkRes.Add ('START _Prelude');  { defined in rtl/netware/nwpre.pp }
  LinkRes.Add ('EXIT _Stop');

  //if not (cs_link_strip in aktglobalswitches) then
  { ahhhggg: how do i detect if we have debug-symbols ? }
  LinkRes.Add ('DEBUG');

  { Write staticlibraries, is that correct ? }
  if not StaticLibFiles.Empty then
   begin
     While not StaticLibFiles.Empty do
      begin
        S:=lower (StaticLibFiles.GetFirst);
        if s<>'' then
         begin
           i:=Pos(target_info.staticlibext,S);
           if i>0 then
            Delete(S,i,255);
           S := S + '.imp';
           librarysearchpath.FindFile(S,s);
           LinkRes.Add('IMPORT @'+s);
         end
      end;
   end;

  if not SharedLibFiles.Empty then
   begin
     While not SharedLibFiles.Empty do
      begin
        {becuase of upper/lower case mix, we may get duplicate
         names but nlmconv ignores that.
         Here we are setting the import-files for nlmconv. I.e. for
         the module clib or clib.nlm we add IMPORT @clib.imp and also
         the module clib.nlm (autoload)
         ? may it be better to set autoload's via StaticLibFiles ? }
        S:=lower (SharedLibFiles.GetFirst);
        if s<>'' then
         begin
           s2:=s;
           i:=Pos(target_info.sharedlibext,S);
           if i>0 then
            Delete(S,i,255);
           S := S + '.imp';
           librarysearchpath.FindFile(S,s);
           LinkRes.Add('IMPORT @'+s);
           LinkRes.Add('MODULE '+s2);
         end
      end;
   end;

  { write exports }
  hp2:=texported_item(current_module._exports.first);
  while assigned(hp2) do
   begin
     if not hp2.is_var then
      begin
        { Export the Symbol
          Warning: The Symbol is converted to upper-case if not explicitly
          specified by >>Exports BlaBla NAME 'BlaBla';<< }
        Comment(V_Debug,'Exporting '+hp2.name^);
        LinkRes.Add ('EXPORT '+hp2.name^);
      end
     else
      { really ? }
      Comment(V_Error,'Exporting of variables is not supported under netware');
     hp2:=texported_item(hp2.next);
   end;

{ Write and Close response }
  linkres.writetodisk;
  LinkRes.Free;

  WriteResponseFile:=True;
end;


function TLinkerNetware.MakeExecutable:boolean;
var
  binstr,
  cmdstr  : string;
  success : boolean;
  DynLinkStr : string[60];
  StaticStr,
  StripStr   : string[40];
begin
  if not(cs_link_extern in aktglobalswitches) then
   Message1(exec_i_linking,current_module.exefilename^);

{ Create some replacements }
  StaticStr:='';
  StripStr:='';
  DynLinkStr:='';

{ Write used files and libraries }
  WriteResponseFile(false);

{ Call linker }
  SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
  Replace(cmdstr,'$EXE',current_module.exefilename^);
  Replace(cmdstr,'$OPT',Info.ExtraOptions);
  Replace(cmdstr,'$RES',outputexedir+Info.ResName);
  Replace(cmdstr,'$STATIC',StaticStr);
  Replace(cmdstr,'$STRIP',StripStr);
  Replace(cmdstr,'$DYNLINK',DynLinkStr);
  success:=DoExec(FindUtil(BinStr),CmdStr,true,false);

  { Remove ReponseFile }
  if (success) and not(cs_link_extern in aktglobalswitches) then
    RemoveFile(outputexedir+Info.ResName);

  MakeExecutable:=success;   { otherwise a recursive call to link method }
end;


{*****************************************************************************
                                     Initialize
*****************************************************************************}

    const
       target_i386_netware_info : ttargetinfo =
          (
            target       : target_i386_NETWARE;
            name         : 'Netware for i386';
            shortname    : 'Netware';
            flags        : [];
            cpu          : i386;
            unit_env     : 'NETWAREUNITS';
            extradefines : '';
            sharedlibext : '.nlm';
            staticlibext : '.a';
            sourceext    : '.pp';
            pasext       : '.pas';
            exeext       : '.nlm';
            defext       : '.def';
            scriptext    : '.sh';
            smartext     : '.sl';
            unitext      : '.ppn';
            unitlibext   : '.ppl';
            asmext       : '.s';
            objext       : '.on';
            resext       : '.res';
            resobjext    : '.or';
            staticlibprefix : '';
            sharedlibprefix : '';
            Cprefix      : '';
            newline      : #13#10;
            assem        : as_i386_elf32;
            assemextern  : as_i386_as;
            link         : ld_i386_netware;
            linkextern   : ld_i386_netware;
            ar           : ar_gnu_ar;
            res          : res_none;
            endian       : endian_little;
            stackalignment : 4;
            maxCrecordalignment : 4;
            size_of_pointer : 4;
            size_of_longint : 4;
            heapsize     : 256*1024;
            maxheapsize  : 32768*1024;
            stacksize    : 8192;
            DllScanSupported:false;
            use_bound_instruction : false;
            use_function_relative_addresses : true
          );


initialization
  RegisterLinker(ld_i386_netware,TLinkerNetware);
  RegisterImport(target_i386_netware,TImportLibNetware);
  RegisterExport(target_i386_netware,TExportLibNetware);
  RegisterTarget(target_i386_netware_info);
end.
{
  $Log$
  Revision 1.7  2001-06-28 19:46:25  peter
    * added override and virtual for constructors

  Revision 1.6  2001/06/03 15:15:32  peter
    * dllprt0 stub for linux shared libs
    * pass -init and -fini for linux shared libs
    * libprefix splitted into staticlibprefix and sharedlibprefix

  Revision 1.5  2001/06/02 19:22:44  peter
    * extradefines field added

  Revision 1.4  2001/05/30 21:35:49  peter
    * netware patches for copyright, screenname, threadname directives

  Revision 1.3  2001/04/18 22:02:04  peter
    * registration of targets and assemblers

  Revision 1.2  2001/04/13 01:22:21  peter
    * symtable change to classes
    * range check generation and errors fixed, make cycle DEBUG=1 works
    * memory leaks fixed

  Revision 1.1  2001/02/26 19:43:11  peter
    * moved target units to subdir

  Revision 1.6  2001/02/20 21:41:16  peter
    * new fixfilename, findfile for unix. Look first for lowercase, then
      NormalCase and last for UPPERCASE names.

  Revision 1.5  2000/12/25 00:07:30  peter
    + new tlinkedlist class (merge of old tstringqueue,tcontainer and
      tlinkedlist objects)

  Revision 1.4  2000/11/29 00:30:42  florian
    * unused units removed from uses clause
    * some changes for widestrings

  Revision 1.3  2000/10/31 22:02:55  peter
    * symtable splitted, no real code changes

  Revision 1.2  2000/09/24 15:06:31  peter
    * use defines.inc

  Revision 1.1  2000/09/11 17:00:23  florian
    + first implementation of Netware Module support, thanks to
      Armin Diehl ([email protected]) for providing the patches

}