freepascal.compiler/compiler/t_win32.pas

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

    This unit implements support import,export,link routines
    for the (i386) Win32 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.

 ****************************************************************************
}
unit t_win32;

  interface

  uses import,export,link;

  const
     winstackpagesize = 4096;

  type
    pimportlibwin32=^timportlibwin32;
    timportlibwin32=object(timportlib)
      procedure preparelib(const s:string);virtual;
      procedure importprocedure(const func,module:string;index:longint;const name:string);virtual;
      procedure importvariable(const varname,module:string;const name:string);virtual;
      procedure generatelib;virtual;
      procedure generatesmartlib;virtual;
    end;

    pexportlibwin32=^texportlibwin32;
    texportlibwin32=object(texportlib)
      st : string;
      last_index : longint;
      procedure preparelib(const s:string);virtual;
      procedure exportprocedure(hp : pexported_item);virtual;
      procedure exportvar(hp : pexported_item);virtual;
      procedure generatelib;virtual;
    end;

    plinkerwin32=^tlinkerwin32;
    tlinkerwin32=object(tlinker)
    private
       Function  WriteResponseFile(isdll:boolean) : Boolean;
       Function  PostProcessExecutable(const fn:string;isdll:boolean) : Boolean;
    public
       Constructor Init;
       Procedure SetDefaultInfo;virtual;
       function  MakeExecutable:boolean;virtual;
       function  MakeSharedLibrary:boolean;virtual;
    end;


  implementation

    uses
       aasm,files,globtype,globals,cobjects,systems,verbose,
       script,gendef,
       cpubase,cpuasm
{$ifdef GDB}
       ,gdb
{$endif}
       ;

    function DllName(Const Name : string) : string;
      var n : string;
      begin
         n:=Upper(SplitExtension(Name));
         if (n='.DLL') or (n='.DRV') or (n='.EXE') then
           DllName:=Name
         else
           DllName:=Name+target_os.sharedlibext;
      end;


{*****************************************************************************
                             TIMPORTLIBWIN32
*****************************************************************************}

    procedure timportlibwin32.preparelib(const s : string);
      begin
         if not(assigned(importssection)) then
           importssection:=new(paasmoutput,init);
      end;


    procedure timportlibwin32.importprocedure(const func,module : string;index : longint;const name : string);
      var
         hp1 : pimportlist;
         hp2 : pimported_item;
         hs  : string;
      begin
         hs:=DllName(module);
         { search for the module }
         hp1:=pimportlist(current_module^.imports^.first);
         while assigned(hp1) do
           begin
              if hs=hp1^.dllname^ then
                break;
              hp1:=pimportlist(hp1^.next);
           end;
         { generate a new item ? }
         if not(assigned(hp1)) then
           begin
              hp1:=new(pimportlist,init(hs));
              current_module^.imports^.concat(hp1);
           end;
         { search for reuse of old import item }
         hp2:=pimported_item(hp1^.imported_items^.first);
         while assigned(hp2) do
          begin
            if hp2^.func^=func then
             break;
            hp2:=pimported_item(hp2^.next);
          end;
         if not assigned(hp2) then
          begin
            hp2:=new(pimported_item,init(func,name,index));
            hp1^.imported_items^.concat(hp2);
          end;
      end;


    procedure timportlibwin32.importvariable(const varname,module:string;const name:string);
      var
         hp1 : pimportlist;
         hp2 : pimported_item;
         hs  : string;
      begin
         hs:=DllName(module);
         { search for the module }
         hp1:=pimportlist(current_module^.imports^.first);
         while assigned(hp1) do
           begin
              if hs=hp1^.dllname^ then
                break;
              hp1:=pimportlist(hp1^.next);
           end;
         { generate a new item ? }
         if not(assigned(hp1)) then
           begin
              hp1:=new(pimportlist,init(hs));
              current_module^.imports^.concat(hp1);
           end;
         hp2:=new(pimported_item,init_var(varname,name));
         hp1^.imported_items^.concat(hp2);
      end;


    procedure timportlibwin32.generatesmartlib;
      var
         hp1 : pimportlist;
         hp2 : pimported_item;
         lhead,lname,lcode,
         lidata4,lidata5 : pasmlabel;
         r : preference;
      begin
         hp1:=pimportlist(current_module^.imports^.first);
         while assigned(hp1) do
           begin
           { Get labels for the sections }
             getdatalabel(lhead);
             getdatalabel(lname);
             getlabel(lidata4);
             getlabel(lidata5);
           { create header for this importmodule }
             importssection^.concat(new(pai_cut,init_begin));
             importssection^.concat(new(pai_section,init(sec_idata2)));
             importssection^.concat(new(pai_label,init(lhead)));
             { pointer to procedure names }
             importssection^.concat(new(pai_const_symbol,init_rva(lidata4)));
             { two empty entries follow }
             importssection^.concat(new(pai_const,init_32bit(0)));
             importssection^.concat(new(pai_const,init_32bit(0)));
             { pointer to dll name }
             importssection^.concat(new(pai_const_symbol,init_rva(lname)));
             { pointer to fixups }
             importssection^.concat(new(pai_const_symbol,init_rva(lidata5)));
             { first write the name references }
             importssection^.concat(new(pai_section,init(sec_idata4)));
             importssection^.concat(new(pai_const,init_32bit(0)));
             importssection^.concat(new(pai_label,init(lidata4)));
             { then the addresses and create also the indirect jump }
             importssection^.concat(new(pai_section,init(sec_idata5)));
             importssection^.concat(new(pai_const,init_32bit(0)));
             importssection^.concat(new(pai_label,init(lidata5)));

             { create procedures }
             hp2:=pimported_item(hp1^.imported_items^.first);
             while assigned(hp2) do
               begin
                 { insert cuts }
                 importssection^.concat(new(pai_cut,init));
                 { create indirect jump }
                 if not hp2^.is_var then
                  begin
                    getlabel(lcode);
                    new(r);
                    reset_reference(r^);
                    r^.symbol:=lcode;
                    { place jump in codesegment, insert a code section in the
                      importsection to reduce the amount of .s files (PFV) }
                    importssection^.concat(new(pai_section,init(sec_code)));
{$IfDef GDB}
                    if (cs_debuginfo in aktmoduleswitches) then
                     importssection^.concat(new(pai_stab_function_name,init(nil)));
{$EndIf GDB}
                    importssection^.concat(new(pai_symbol,initname_global(hp2^.func^,0)));
                    importssection^.concat(new(paicpu,op_ref(A_JMP,S_NO,r)));
                    importssection^.concat(new(pai_align,init_op(4,$90)));
                  end;
                 { create head link }
                 importssection^.concat(new(pai_section,init(sec_idata7)));
                 importssection^.concat(new(pai_const_symbol,init_rva(lhead)));
                 { fixup }
                 getlabel(pasmlabel(hp2^.lab));
                 importssection^.concat(new(pai_section,init(sec_idata4)));
                 importssection^.concat(new(pai_const_symbol,init_rva(hp2^.lab)));
                 { add jump field to importsection }
                 importssection^.concat(new(pai_section,init(sec_idata5)));
                 if hp2^.is_var then
                  importssection^.concat(new(pai_symbol,initname_global(hp2^.func^,0)))
                 else
                  importssection^.concat(new(pai_label,init(lcode)));
                  if hp2^.name^<>'' then
                    importssection^.concat(new(pai_const_symbol,init_rva(hp2^.lab)))
                  else
                    importssection^.concat(new(pai_const,init_32bit($80000000 or hp2^.ordnr)));
                 { finally the import information }
                 importssection^.concat(new(pai_section,init(sec_idata6)));
                 importssection^.concat(new(pai_label,init(hp2^.lab)));
                 importssection^.concat(new(pai_const,init_16bit(hp2^.ordnr)));
                 importssection^.concat(new(pai_string,init(hp2^.name^+#0)));
                 importssection^.concat(new(pai_align,init_op(2,0)));
                 hp2:=pimported_item(hp2^.next);
               end;

              { write final section }
              importssection^.concat(new(pai_cut,init_end));
              { end of name references }
              importssection^.concat(new(pai_section,init(sec_idata4)));
              importssection^.concat(new(pai_const,init_32bit(0)));
              { end if addresses }
              importssection^.concat(new(pai_section,init(sec_idata5)));
              importssection^.concat(new(pai_const,init_32bit(0)));
              { dllname }
              importssection^.concat(new(pai_section,init(sec_idata7)));
              importssection^.concat(new(pai_label,init(lname)));
              importssection^.concat(new(pai_string,init(hp1^.dllname^+#0)));

              hp1:=pimportlist(hp1^.next);
           end;
       end;


    procedure timportlibwin32.generatelib;
      var
         hp1 : pimportlist;
         hp2 : pimported_item;
         l1,l2,l3,l4 : pasmlabel;
         r : preference;
      begin
         hp1:=pimportlist(current_module^.imports^.first);
         while assigned(hp1) do
           begin
              { align codesegment for the jumps }
              importssection^.concat(new(pai_section,init(sec_code)));
              importssection^.concat(new(pai_align,init_op(4,$90)));
              { Get labels for the sections }
              getlabel(l1);
              getlabel(l2);
              getlabel(l3);
              importssection^.concat(new(pai_section,init(sec_idata2)));
              { pointer to procedure names }
              importssection^.concat(new(pai_const_symbol,init_rva(l2)));
              { two empty entries follow }
              importssection^.concat(new(pai_const,init_32bit(0)));
              importssection^.concat(new(pai_const,init_32bit(0)));
              { pointer to dll name }
              importssection^.concat(new(pai_const_symbol,init_rva(l1)));
              { pointer to fixups }
              importssection^.concat(new(pai_const_symbol,init_rva(l3)));

              { only create one section for each else it will
                create a lot of idata* }

              { first write the name references }
              importssection^.concat(new(pai_section,init(sec_idata4)));
              importssection^.concat(new(pai_label,init(l2)));

              hp2:=pimported_item(hp1^.imported_items^.first);
              while assigned(hp2) do
                begin
                   getlabel(pasmlabel(hp2^.lab));
                   if hp2^.name^<>'' then
                     importssection^.concat(new(pai_const_symbol,init_rva(hp2^.lab)))
                   else
                     importssection^.concat(new(pai_const,init_32bit($80000000 or hp2^.ordnr)));
                   hp2:=pimported_item(hp2^.next);
                end;
              { finalize the names ... }
              importssection^.concat(new(pai_const,init_32bit(0)));

              { then the addresses and create also the indirect jump }
              importssection^.concat(new(pai_section,init(sec_idata5)));
              importssection^.concat(new(pai_label,init(l3)));
              hp2:=pimported_item(hp1^.imported_items^.first);
              while assigned(hp2) do
                begin
                   if not hp2^.is_var then
                    begin
                      getlabel(l4);
                      { create indirect jump }
                      new(r);
                      reset_reference(r^);
                      r^.symbol:=l4;
                      { place jump in codesegment }
                      importssection^.concat(new(pai_section,init(sec_code)));
                      importssection^.concat(new(pai_symbol,initname_global(hp2^.func^,0)));
                      importssection^.concat(new(paicpu,op_ref(A_JMP,S_NO,r)));
                      importssection^.concat(new(pai_align,init_op(4,$90)));
                      { add jump field to importsection }
                      importssection^.concat(new(pai_section,init(sec_idata5)));
                      importssection^.concat(new(pai_label,init(l4)));
                    end
                   else
                    begin
                      importssection^.concat(new(pai_symbol,initname_global(hp2^.func^,0)));
                    end;
                   importssection^.concat(new(pai_const_symbol,init_rva(hp2^.lab)));
                   hp2:=pimported_item(hp2^.next);
                end;
              { finalize the addresses }
              importssection^.concat(new(pai_const,init_32bit(0)));

              { finally the import information }
              importssection^.concat(new(pai_section,init(sec_idata6)));
              hp2:=pimported_item(hp1^.imported_items^.first);
              while assigned(hp2) do
                begin
                   importssection^.concat(new(pai_label,init(hp2^.lab)));
                   { the ordinal number }
                   importssection^.concat(new(pai_const,init_16bit(hp2^.ordnr)));
                   importssection^.concat(new(pai_string,init(hp2^.name^+#0)));
                   importssection^.concat(new(pai_align,init_op(2,0)));
                   hp2:=pimported_item(hp2^.next);
                end;
              { create import dll name }
              importssection^.concat(new(pai_section,init(sec_idata7)));
              importssection^.concat(new(pai_label,init(l1)));
              importssection^.concat(new(pai_string,init(hp1^.dllname^+#0)));

              hp1:=pimportlist(hp1^.next);
           end;
      end;


{*****************************************************************************
                             TEXPORTLIBWIN32
*****************************************************************************}

    procedure texportlibwin32.preparelib(const s:string);
      begin
         if not(assigned(exportssection)) then
           exportssection:=new(paasmoutput,init);
         last_index:=0;
      end;



    procedure texportlibwin32.exportvar(hp : pexported_item);
      begin
         { same code used !! PM }
         exportprocedure(hp);
      end;


    procedure texportlibwin32.exportprocedure(hp : pexported_item);
      { must be ordered at least for win32 !! }
      var
        hp2 : pexported_item;
      begin
        { first test the index value }
        if (hp^.options and eo_index)<>0 then
          begin
             if (hp^.index<=0) or (hp^.index>$ffff) then
               begin
                 message1(parser_e_export_invalid_index,tostr(hp^.index));
                 exit;
               end;
             if (hp^.index<=last_index) then
               begin
                 message1(parser_e_export_ordinal_double,tostr(hp^.index));
                 { disregard index value }
                 inc(last_index);
                 hp^.index:=last_index;
                 exit;
               end
             else
               begin
                 last_index:=hp^.index;
               end;
          end
        else
          begin
             inc(last_index);
             hp^.index:=last_index;
          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:=pexported_item(current_module^._exports^.first);
        while assigned(hp2) and
           (hp^.name^>hp2^.name^) do
          hp2:=pexported_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=pexported_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 texportlibwin32.generatelib;
      var
         ordinal_base,ordinal_max,ordinal_min : longint;
         current_index : longint;
         entries,named_entries : longint;
         name_label,dll_name_label,export_address_table : pasmlabel;
         export_name_table_pointers,export_ordinal_table : pasmlabel;
         hp,hp2 : pexported_item;
         tempexport : plinkedlist;
         address_table,name_table_pointers,
         name_table,ordinal_table : paasmoutput;
      begin
         ordinal_max:=0;
         ordinal_min:=$7FFFFFFF;
         entries:=0;
         named_entries:=0;
         getlabel(dll_name_label);
         getlabel(export_address_table);
         getlabel(export_name_table_pointers);
         getlabel(export_ordinal_table);

         hp:=pexported_item(current_module^._exports^.first);

         { count entries }
         while assigned(hp) do
           begin
              inc(entries);
              if (hp^.index>ordinal_max) then
                ordinal_max:=hp^.index;
              if (hp^.index>0) and (hp^.index<ordinal_min) then
                ordinal_min:=hp^.index;
              if assigned(hp^.name) then
                inc(named_entries);
              hp:=pexported_item(hp^.next);
           end;

         { no support for higher ordinal base yet !! }
         ordinal_base:=1;
         current_index:=ordinal_base;
         { we must also count the holes !! }
         entries:=ordinal_max-ordinal_base+1;

         exportssection^.concat(new(pai_section,init(sec_edata)));
         { export flags }
         exportssection^.concat(new(pai_const,init_32bit(0)));
         { date/time stamp }
         exportssection^.concat(new(pai_const,init_32bit(0)));
         { major version }
         exportssection^.concat(new(pai_const,init_16bit(0)));
         { minor version }
         exportssection^.concat(new(pai_const,init_16bit(0)));
         { pointer to dll name }
         exportssection^.concat(new(pai_const_symbol,init_rva(dll_name_label)));
         { ordinal base normally set to 1 }
         exportssection^.concat(new(pai_const,init_32bit(ordinal_base)));
         { number of entries }
         exportssection^.concat(new(pai_const,init_32bit(entries)));
         { number of named entries }
         exportssection^.concat(new(pai_const,init_32bit(named_entries)));
         { address of export address table }
         exportssection^.concat(new(pai_const_symbol,init_rva(export_address_table)));
         { address of name pointer pointers }
         exportssection^.concat(new(pai_const_symbol,init_rva(export_name_table_pointers)));
         { address of ordinal number pointers }
         exportssection^.concat(new(pai_const_symbol,init_rva(export_ordinal_table)));
         { the name }
         exportssection^.concat(new(pai_label,init(dll_name_label)));
         if st='' then
           exportssection^.concat(new(pai_string,init(current_module^.modulename^+target_os.sharedlibext+#0)))
         else
           exportssection^.concat(new(pai_string,init(st+target_os.sharedlibext+#0)));

         {  export address table }
         address_table:=new(paasmoutput,init);
         address_table^.concat(new(pai_align,init_op(4,0)));
         address_table^.concat(new(pai_label,init(export_address_table)));
         name_table_pointers:=new(paasmoutput,init);
         name_table_pointers^.concat(new(pai_align,init_op(4,0)));
         name_table_pointers^.concat(new(pai_label,init(export_name_table_pointers)));
         ordinal_table:=new(paasmoutput,init);
         ordinal_table^.concat(new(pai_align,init_op(4,0)));
         ordinal_table^.concat(new(pai_label,init(export_ordinal_table)));
         name_table:=new(paasmoutput,init);
         name_table^.concat(new(pai_align,init_op(4,0)));
         { write each address }
         hp:=pexported_item(current_module^._exports^.first);
         while assigned(hp) do
           begin
              if (hp^.options and eo_name)<>0 then
                begin
                   getlabel(name_label);
                   name_table_pointers^.concat(new(pai_const_symbol,init_rva(name_label)));
                   ordinal_table^.concat(new(pai_const,init_16bit(hp^.index-ordinal_base)));
                   name_table^.concat(new(pai_align,init_op(2,0)));
                   name_table^.concat(new(pai_label,init(name_label)));
                   name_table^.concat(new(pai_string,init(hp^.name^+#0)));
                end;
              hp:=pexported_item(hp^.next);
           end;
         { order in increasing ordinal values }
         { into tempexport list }
         tempexport:=new(plinkedlist,init);
         hp:=pexported_item(current_module^._exports^.first);
         while assigned(hp) do
           begin
              current_module^._exports^.remove(hp);
              hp2:=pexported_item(tempexport^.first);
              while assigned(hp2) and (hp^.index>hp2^.index) do
                begin
                   hp2:=pexported_item(hp2^.next);
                end;
              if hp2=pexported_item(tempexport^.first) then
                 tempexport^.insert(hp)
              else
                begin
                   if assigned(hp2) then
                     begin
                        hp^.next:=hp2;
                        hp^.previous:=hp2^.previous;
                        hp2^.previous:=hp;
                        if assigned(hp^.previous) then
                          hp^.previous^.next:=hp;
                      end
                    else
                      tempexport^.concat(hp);
                end;
              hp:=pexported_item(current_module^._exports^.first);;
           end;

         { write the export adress table }
         current_index:=ordinal_base;
         hp:=pexported_item(tempexport^.first);
         while assigned(hp) do
           begin
              { fill missing values }
              while current_index<hp^.index do
                begin
                   address_table^.concat(new(pai_const,init_32bit(0)));
                   inc(current_index);
                end;
              address_table^.concat(new(pai_const_symbol,initname_rva(hp^.sym^.mangledname)));
              inc(current_index);
              hp:=pexported_item(hp^.next);
           end;

         exportssection^.concatlist(address_table);
         exportssection^.concatlist(name_table_pointers);
         exportssection^.concatlist(ordinal_table);
         exportssection^.concatlist(name_table);
         dispose(address_table,done);
         dispose(name_table_pointers,done);
         dispose(ordinal_table,done);
         dispose(name_table,done);
         dispose(tempexport,done);
      end;


{****************************************************************************
                              TLINKERWIN32
****************************************************************************}

Constructor TLinkerWin32.Init;
begin
  Inherited Init;
  { allow duplicated libs (PM) }
  SharedLibFiles.doubles:=true;
  StaticLibFiles.doubles:=true;
  If not ForceDeffileForExport then
    UseDeffileForExport:=false;
end;

Procedure TLinkerWin32.SetDefaultInfo;
begin
  with Info do
   begin
     ExeCmd[1]:='ldw $OPT $STRIP $APPTYPE $IMAGEBASE $RELOC -o $EXE $RES';
     DllCmd[1]:='ldw $OPT $STRIP --dll $APPTYPE $IMAGEBASE $RELOC -o $EXE $RES';
     if RelocSection or UseDeffileForExport then
       begin
          { ExeCmd[2]:='dlltool --as $ASBIN --dllname $EXE --output-exp exp.$$$ $RELOC $DEF';
            use short forms to avoid 128 char limitation problem }
          ExeCmd[2]:='dlltool -S $ASBIN -D $EXE -e exp.$$$ $RELOC $DEF';
          ExeCmd[3]:='ldw $OPT $STRIP $APPTYPE $IMAGEBASE -o $EXE $RES exp.$$$';
          { DllCmd[2]:='dlltool --as $ASBIN --dllname $EXE --output-exp exp.$$$ $RELOC $DEF'; }
          DllCmd[2]:='dlltool -S $ASBIN -D $EXE -e exp.$$$ $RELOC $DEF';
          DllCmd[3]:='ldw $OPT $STRIP --dll $APPTYPE $IMAGEBASE -o $EXE $RES exp.$$$';
       end;
   end;
end;


Function TLinkerWin32.WriteResponseFile(isdll:boolean) : Boolean;
Var
  linkres  : TLinkRes;
  i        : longint;
{$IFDEF NEWST}
  HPath    : PStringItem;
{$ELSE}
  HPath    : PStringQueueItem;
{$ENDIF NEWST}
  s        : string;
  linklibc : boolean;
begin
  WriteResponseFile:=False;

  { Open link.res file }
  LinkRes.Init(outputexedir+Info.ResName);

  { Write path to search libraries }
  HPath:=current_module^.locallibrarysearchpath.First;
  while assigned(HPath) do
   begin
     LinkRes.Add('SEARCH_DIR('+GetShortName(HPath^.Data^)+')');
     HPath:=HPath^.Next;
   end;
  HPath:=LibrarySearchPath.First;
  while assigned(HPath) do
   begin
     LinkRes.Add('SEARCH_DIR('+GetShortName(HPath^.Data^)+')');
     HPath:=HPath^.Next;
   end;

  { add objectfiles, start with prt0 always }
  LinkRes.Add('INPUT(');
  if isdll then
   LinkRes.AddFileName(GetShortName(FindObjectFile('wdllprt0')))
  else
   LinkRes.AddFileName(GetShortName(FindObjectFile('wprt0')));
  while not ObjectFiles.Empty do
   begin
     s:=ObjectFiles.Get;
     if s<>'' then
      LinkRes.AddFileName(GetShortName(s));
   end;
  LinkRes.Add(')');

  { Write staticlibraries }
  if not StaticLibFiles.Empty then
   begin
     LinkRes.Add('GROUP(');
     While not StaticLibFiles.Empty do
      begin
        S:=StaticLibFiles.Get;
        LinkRes.AddFileName(GetShortName(s));
      end;
     LinkRes.Add(')');
   end;

  { Write sharedlibraries like -l<lib>, also add the needed dynamic linker
    here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
  if not SharedLibFiles.Empty then
   begin
     linklibc:=false;
     LinkRes.Add('INPUT(');
     While not SharedLibFiles.Empty do
      begin
        S:=SharedLibFiles.Get;
        if s<>'c' then
         begin
           i:=Pos(target_os.sharedlibext,S);
           if i>0 then
            Delete(S,i,255);
           LinkRes.Add('-l'+s);
         end
        else
         begin
           LinkRes.Add('-l'+s);
           linklibc:=true;
         end;
      end;
     { be sure that libc is the last lib }
     if linklibc then
      LinkRes.Add('-lc');
     LinkRes.Add(')');
   end;
{ Write and Close response }
  linkres.writetodisk;
  linkres.done;

  WriteResponseFile:=True;
end;


function TLinkerWin32.MakeExecutable:boolean;
var
  binstr,
  cmdstr  : string;
  found,
  success : boolean;
  i       : longint;
  AsBinStr     : string[80];
  StripStr,
  RelocStr,
  AppTypeStr,
  ImageBaseStr : string[40];
begin
  if not(cs_link_extern in aktglobalswitches) then
   Message1(exec_i_linking,current_module^.exefilename^);

{ Create some replacements }
  RelocStr:='';
  AppTypeStr:='';
  ImageBaseStr:='';
  StripStr:='';
  AsBinStr:=FindExe('asw',found);
  if RelocSection then
   { Using short form to avoid problems with 128 char limitation under Dos. }
   RelocStr:='-b base.$$$';
  if apptype=at_gui then
   AppTypeStr:='--subsystem windows';
  if assigned(DLLImageBase) then
   ImageBaseStr:='--image-base=0x'+DLLImageBase^;
  if (cs_link_strip in aktglobalswitches) then
   StripStr:='-s';

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

{ Call linker }
  success:=false;
  for i:=1 to 3 do
   begin
     SplitBinCmd(Info.ExeCmd[i],binstr,cmdstr);
     if binstr<>'' then
      begin
        Replace(cmdstr,'$EXE',current_module^.exefilename^);
        Replace(cmdstr,'$OPT',Info.ExtraOptions);
        Replace(cmdstr,'$RES',outputexedir+Info.ResName);
        Replace(cmdstr,'$APPTYPE',AppTypeStr);
        Replace(cmdstr,'$ASBIN',AsbinStr);
        Replace(cmdstr,'$RELOC',RelocStr);
        Replace(cmdstr,'$IMAGEBASE',ImageBaseStr);
        Replace(cmdstr,'$STRIP',StripStr);
        if not DefFile.Empty {and UseDefFileForExport} then
          begin
            DefFile.WriteFile;
            Replace(cmdstr,'$DEF','-d '+deffile.fname);
          end
        else
          Replace(cmdstr,'$DEF','');
        success:=DoExec(FindUtil(binstr),cmdstr,(i=1),false);
        if not success then
         break;
      end;
   end;

{ Post process }
  if success then
   success:=PostProcessExecutable(current_module^.exefilename^,false);

{ Remove ReponseFile }
  if (success) and not(cs_link_extern in aktglobalswitches) then
   begin
     RemoveFile(outputexedir+Info.ResName);
     RemoveFile('base.$$$');
     RemoveFile('exp.$$$');
   end;

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


Function TLinkerWin32.MakeSharedLibrary:boolean;
var
  binstr,
  cmdstr  : string;
  found,
  success : boolean;
  i       : longint;
  AsBinStr     : string[80];
  StripStr,
  RelocStr,
  AppTypeStr,
  ImageBaseStr : string[40];
begin
  MakeSharedLibrary:=false;
  if not(cs_link_extern in aktglobalswitches) then
   Message1(exec_i_linking,current_module^.sharedlibfilename^);

{ Create some replacements }
  RelocStr:='';
  AppTypeStr:='';
  ImageBaseStr:='';
  StripStr:='';
  AsBinStr:=FindExe('asw',found);
  if RelocSection then
   { Using short form to avoid problems with 128 char limitation under Dos. }
   RelocStr:='-b base.$$$';
  if apptype=at_gui then
   AppTypeStr:='--subsystem windows';
  if assigned(DLLImageBase) then
   ImageBaseStr:='--image-base=0x'+DLLImageBase^;
  if (cs_link_strip in aktglobalswitches) then
   StripStr:='-s';

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

{ Call linker }
  success:=false;
  for i:=1 to 3 do
   begin
     SplitBinCmd(Info.DllCmd[i],binstr,cmdstr);
     if binstr<>'' then
      begin
        Replace(cmdstr,'$EXE',current_module^.sharedlibfilename^);
        Replace(cmdstr,'$OPT',Info.ExtraOptions);
        Replace(cmdstr,'$RES',outputexedir+Info.ResName);
        Replace(cmdstr,'$APPTYPE',AppTypeStr);
        Replace(cmdstr,'$ASBIN',AsbinStr);
        Replace(cmdstr,'$RELOC',RelocStr);
        Replace(cmdstr,'$IMAGEBASE',ImageBaseStr);
        Replace(cmdstr,'$STRIP',StripStr);
        if not DefFile.Empty {and UseDefFileForExport} then
          begin
            DefFile.WriteFile;
            Replace(cmdstr,'$DEF','-d '+deffile.fname);
          end
        else
          Replace(cmdstr,'$DEF','');
        success:=DoExec(FindUtil(binstr),cmdstr,(i=1),false);
        if not success then
         break;
      end;
   end;

{ Post process }
  if success then
   success:=PostProcessExecutable(current_module^.sharedlibfilename^,true);

{ Remove ReponseFile }
  if (success) and not(cs_link_extern in aktglobalswitches) then
   begin
     RemoveFile(outputexedir+Info.ResName);
     RemoveFile('base.$$$');
     RemoveFile('exp.$$$');
   end;
  MakeSharedLibrary:=success;   { otherwise a recursive call to link method }
end;


function tlinkerwin32.postprocessexecutable(const fn : string;isdll:boolean):boolean;
type
  tdosheader = packed record
     e_magic : word;
     e_cblp : word;
     e_cp : word;
     e_crlc : word;
     e_cparhdr : word;
     e_minalloc : word;
     e_maxalloc : word;
     e_ss : word;
     e_sp : word;
     e_csum : word;
     e_ip : word;
     e_cs : word;
     e_lfarlc : word;
     e_ovno : word;
     e_res : array[0..3] of word;
     e_oemid : word;
     e_oeminfo : word;
     e_res2 : array[0..9] of word;
     e_lfanew : longint;
  end;
  tpeheader = packed record
     PEMagic : array[0..3] of char;
     Machine : word;
     NumberOfSections : word;
     TimeDateStamp : longint;
     PointerToSymbolTable : longint;
     NumberOfSymbols : longint;
     SizeOfOptionalHeader : word;
     Characteristics : word;
     Magic : word;
     MajorLinkerVersion : byte;
     MinorLinkerVersion : byte;
     SizeOfCode : longint;
     SizeOfInitializedData : longint;
     SizeOfUninitializedData : longint;
     AddressOfEntryPoint : longint;
     BaseOfCode : longint;
     BaseOfData : longint;
     ImageBase : longint;
     SectionAlignment : longint;
     FileAlignment : longint;
     MajorOperatingSystemVersion : word;
     MinorOperatingSystemVersion : word;
     MajorImageVersion : word;
     MinorImageVersion : word;
     MajorSubsystemVersion : word;
     MinorSubsystemVersion : word;
     Reserved1 : longint;
     SizeOfImage : longint;
     SizeOfHeaders : longint;
     CheckSum : longint;
     Subsystem : word;
     DllCharacteristics : word;
     SizeOfStackReserve : longint;
     SizeOfStackCommit : longint;
     SizeOfHeapReserve : longint;
     SizeOfHeapCommit : longint;
     LoaderFlags : longint;
     NumberOfRvaAndSizes : longint;
     DataDirectory : array[1..$80] of byte;
  end;
  tcoffsechdr=packed record
    name     : array[0..7] of char;
    vsize    : longint;
    rvaofs   : longint;
    datalen  : longint;
    datapos  : longint;
    relocpos : longint;
    lineno1  : longint;
    nrelocs  : word;
    lineno2  : word;
    flags    : longint;
  end;
  psecfill=^tsecfill;
  tsecfill=record
    fillpos,
    fillsize : longint;
    next : psecfill;
  end;
var
  f : file;
  dosheader : tdosheader;
  peheader : tpeheader;
  firstsecpos,
  maxfillsize,
  l,peheaderpos : longint;
  coffsec : tcoffsechdr;
  secroot,hsecroot : psecfill;
  zerobuf : pointer;
begin
  postprocessexecutable:=false;
  { when -s is used or it's a dll then quit }
  if (cs_link_extern in aktglobalswitches) then
   begin
     postprocessexecutable:=true;
     exit;
   end;
  { open file }
  assign(f,fn);
  {$I-}
   reset(f,1);
  if ioresult<>0 then
    Message1(execinfo_f_cant_open_executable,fn);
  { read headers }
  blockread(f,dosheader,sizeof(tdosheader));
  peheaderpos:=dosheader.e_lfanew;
  seek(f,peheaderpos);
  blockread(f,peheader,sizeof(tpeheader));
  { write info }
  Message1(execinfo_x_codesize,tostr(peheader.SizeOfCode));
  Message1(execinfo_x_initdatasize,tostr(peheader.SizeOfInitializedData));
  Message1(execinfo_x_uninitdatasize,tostr(peheader.SizeOfUninitializedData));
  { change stack size (PM) }
  { I am not sure that the default value is adequate !! }
  peheader.SizeOfStackReserve:=stacksize;
  { change the header }
  { sub system }
  { gui=2 }
  { cui=3 }
  if apptype=at_gui then
    peheader.Subsystem:=2
  else if apptype=at_cui then
    peheader.Subsystem:=3;
  if dllversion<>'' then
    begin
     peheader.MajorImageVersion:=dllmajor;
     peheader.MinorImageVersion:=dllminor;
    end;
  { reset timestamp }
  peheader.TimeDateStamp:=0;
  { write header back }
  seek(f,peheaderpos);
  blockwrite(f,peheader,sizeof(tpeheader));
  if ioresult<>0 then
    Message1(execinfo_f_cant_process_executable,fn);
  seek(f,peheaderpos);
  blockread(f,peheader,sizeof(tpeheader));
  { write the value after the change }
  Message1(execinfo_x_stackreserve,tostr(peheader.SizeOfStackReserve));
  Message1(execinfo_x_stackcommit,tostr(peheader.SizeOfStackCommit));
  { read section info }
  maxfillsize:=0;
  firstsecpos:=0;
  secroot:=nil;
  for l:=1to peheader.NumberOfSections do
   begin
     blockread(f,coffsec,sizeof(tcoffsechdr));
     if coffsec.datapos>0 then
      begin
        if secroot=nil then
         firstsecpos:=coffsec.datapos;
        new(hsecroot);
        hsecroot^.fillpos:=coffsec.datapos+coffsec.vsize;
        hsecroot^.fillsize:=coffsec.datalen-coffsec.vsize;
        hsecroot^.next:=secroot;
        secroot:=hsecroot;
        if secroot^.fillsize>maxfillsize then
         maxfillsize:=secroot^.fillsize;
      end;
   end;
  if firstsecpos>0 then
   begin
     l:=firstsecpos-filepos(f);
     if l>maxfillsize then
      maxfillsize:=l;
   end
  else
   l:=0;
  { get zero buffer }
  getmem(zerobuf,maxfillsize);
  fillchar(zerobuf^,maxfillsize,0);
  { zero from sectioninfo until first section }
  blockwrite(f,zerobuf^,l);
  { zero section alignments }
  while assigned(secroot) do
   begin
     seek(f,secroot^.fillpos);
     blockwrite(f,zerobuf^,secroot^.fillsize);
     hsecroot:=secroot;
     secroot:=secroot^.next;
     dispose(hsecroot);
   end;
  freemem(zerobuf,maxfillsize);
  close(f);
  {$I+}
  if ioresult<>0 then;
  postprocessexecutable:=true;
end;

end.
{
  $Log$
  Revision 1.21  2000-03-10 09:14:40  pierre
   * dlltool is also needed if we use DefFile

  Revision 1.20  2000/02/28 17:23:57  daniel
  * Current work of symtable integration committed. The symtable can be
    activated by defining 'newst', but doesn't compile yet. Changes in type
    checking and oop are completed. What is left is to write a new
    symtablestack and adapt the parser to use it.

  Revision 1.19  2000/02/24 18:41:39  peter
    * removed warnings/notes

  Revision 1.18  2000/01/12 10:31:45  peter
    * fixed group() writing

  Revision 1.17  2000/01/11 09:52:07  peter
    * fixed placing of .sl directories
    * use -b again for base-file selection
    * fixed group writing for linux with smartlinking

  Revision 1.16  2000/01/09 00:55:51  pierre
    * GROUP of smartlink units put before the C libraries
      to allow for smartlinking code that uses C code.

  Revision 1.15  2000/01/07 01:14:43  peter
    * updated copyright to 2000

  Revision 1.14  2000/01/07 00:10:26  peter
    * --base-file instead of -b as dlltool 2.9.1 doesn't understand it
    * clear timestamp in pe header

  Revision 1.13  1999/12/20 23:23:30  pierre
   + $description $version

  Revision 1.12  1999/12/08 10:40:01  pierre
    + allow use of unit var in exports of DLL for win32
      by using direct export writing by default instead of use of DEFFILE
      that does not allow assembler labels that do not
      start with an underscore.
      Use -WD to force use of Deffile for Win32 DLL

  Revision 1.11  1999/12/06 18:21:04  peter
    * support !ENVVAR for long commandlines
    * win32/go32v2 write short pathnames to link.res so c:\Program Files\ is
      finally supported as installdir.

  Revision 1.10  1999/11/24 11:45:36  pierre
   * $STRIP was missign in DllCmd[1]

  Revision 1.9  1999/11/22 22:20:43  pierre
    * Def file syntax for win32 with index corrected
    * direct output of .edata leads to same indexes
      (index 5 leads to next export being 6 unless otherwise
      specified like for enums)

  Revision 1.8  1999/11/16 23:39:04  peter
    * use outputexedir for link.res location

  Revision 1.7  1999/11/15 15:01:56  pierre
   + Pavel's changes to support reloc section in exes

  Revision 1.6  1999/11/12 11:03:50  peter
    * searchpaths changed to stringqueue object

  Revision 1.5  1999/11/04 10:55:31  peter
    * TSearchPathString for the string type of the searchpaths, which is
      ansistring under FPC/Delphi

  Revision 1.4  1999/11/02 15:06:58  peter
    * import library fixes for win32
    * alignment works again

  Revision 1.3  1999/10/28 10:33:06  pierre
   * Libs can be link serveral times

  Revision 1.2  1999/10/22 14:42:40  peter
    * reset linklibc

  Revision 1.1  1999/10/21 14:29:38  peter
    * redesigned linker object
    + library support for linux (only procedures can be exported)

}