freepascal.compiler/compiler/systems/t_win.pas

{
    Copyright (c) 1998-2002 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_win;

{$i fpcdefs.inc}

interface
    uses
       dos,
       cutils,cclasses,
       aasmbase,aasmtai,aasmdata,aasmcpu,fmodule,globtype,globals,systems,verbose,
       symconst,symdef,symsym,
       script,gendef,
       cpubase,
       import,export,link,cgobj,i_win;


  const
     MAX_DEFAULT_EXTENSIONS = 3;

  type
     tStr4=array[1..MAX_DEFAULT_EXTENSIONS] of string[4];
     pStr4=^tStr4;

    twin32imported_item = class(timported_item)
    end;

    timportlibwin32=class(timportlib)
    private
      procedure win32importproc(const module : string;index : longint;const name : string);
      procedure importvariable_str(const s:string;const name,module:string);
      procedure importprocedure_str(const module:string;index:longint;const name:string);
      procedure generateimportlib;
      procedure generateidatasection;
    public
      procedure preparelib(const s:string);override;
      procedure importprocedure(aprocdef:tprocdef;const module:string;index:longint;const name:string);override;
      procedure importvariable(vs:tglobalvarsym;const name,module:string);override;
      procedure generatelib;override;
    end;

    texportlibwin32=class(texportlib)
      st : string;
      EList_indexed:TFPList;
      EList_nonindexed:TFPList;
      procedure preparelib(const s:string);override;
      procedure exportprocedure(hp : texported_item);override;
      procedure exportvar(hp : texported_item);override;
      procedure exportfromlist(hp : texported_item);
      procedure generatelib;override;
      procedure generatenasmlib;virtual;
    end;

    tlinkerwin32=class(texternallinker)
    private
       Function  WriteResponseFile(isdll:boolean) : Boolean;
       Function  PostProcessExecutable(const fn:string;isdll:boolean) : Boolean;
    public
       Constructor Create;override;
       Procedure SetDefaultInfo;override;
       function  MakeExecutable:boolean;override;
       function  MakeSharedLibrary:boolean;override;
    end;

    tDLLScannerWin32=class(tDLLScanner)
    private
      importfound : boolean;
      procedure CheckDLLFunc(const dllname,funcname:string);
    public
      function Scan(const binname:string):boolean;override;
    end;


implementation

  uses
    cpuinfo,cgutils,dbgbase,
    owar,ogbase,ogcoff;


  const
    res_gnu_windres_info : tresinfo =
        (
          id     : res_gnu_windres;
          resbin : 'windres';
          rescmd : '--include $INC -O coff -o $OBJ $RES'
        );

    res_gnu_wince_windres_info : tresinfo =
        (
          id     : res_gnu_wince_windres;
          resbin : 'windres';
          rescmd : '--include $INC -O coff -o $OBJ $RES'
        );

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

    procedure timportlibwin32.preparelib(const s : string);
      begin
         if current_asmdata.asmlists[al_imports]=nil then
           current_asmdata.asmlists[al_imports]:=TAsmList.create;
      end;


    procedure timportlibwin32.win32importproc(const module : string;index : longint;const name : string);
      var
         hp1 : timportList;
         hp2 : twin32imported_item;
         hs  : string;
      begin
         { append extension if required }
         hs:=AddExtension(module,target_info.sharedlibext);
         { search for the module }
         hp1:=timportlist(current_module.imports.first);
         while assigned(hp1) do
           begin
              if hs=hp1.dllname^ then
                break;
              hp1:=timportlist(hp1.next);
           end;
         { generate a new item ? }
         if not(assigned(hp1)) then
           begin
              hp1:=timportlist.create(hs);
              current_module.imports.concat(hp1);
           end;
         { search for reuse of old import item }
         hp2:=twin32imported_item(hp1.imported_items.first);
         while assigned(hp2) do
          begin
            if (hp2.name^=name) and (hp2.ordnr=index) then
              break;
            hp2:=twin32imported_item(hp2.next);
          end;
         if not assigned(hp2) then
          begin
            hp2:=twin32imported_item.create(name,name,index);
            hp1.imported_items.concat(hp2);
          end;
      end;


    procedure timportlibwin32.importprocedure(aprocdef:tprocdef;const module : string;index : longint;const name : string);
      begin
        win32importproc(module,index,name);
      end;


    procedure timportlibwin32.importprocedure_str(const module : string;index : longint;const name : string);
      begin
        win32importproc(module,index,name);
      end;


    procedure timportlibwin32.importvariable(vs:tglobalvarsym;const name,module:string);
      begin
        importvariable_str(vs.mangledname,name,module);
      end;


    procedure timportlibwin32.importvariable_str(const s:string;const name,module:string);
      var
         hp1 : timportList;
         hp2 : twin32imported_item;
         hs  : string;
      begin
         hs:=AddExtension(module,target_info.sharedlibext);
         { search for the module }
         hp1:=timportlist(current_module.imports.first);
         while assigned(hp1) do
           begin
              if hs=hp1.dllname^ then
                break;
              hp1:=timportlist(hp1.next);
           end;
         { generate a new item ? }
         if not(assigned(hp1)) then
           begin
              hp1:=timportlist.create(hs);
              current_module.imports.concat(hp1);
           end;
         hp2:=twin32imported_item.create_var(s,name);
         hp1.imported_items.concat(hp2);
      end;


    procedure timportlibwin32.generateimportlib;
      var
        ObjWriter        : tarobjectwriter;
        ObjOutput        : TPECoffObjOutput;
        basedllname      : string;
        AsmPrefix        : string;
        idatalabnr,
        SmartFilesCount,
        SmartHeaderCount : longint;

        function CreateObjData(place:tcutplace):TObjData;
        var
          s : string;
        begin
          s:='';
          case place of
            cut_begin :
              begin
                inc(SmartHeaderCount);
                s:=asmprefix+tostr(SmartHeaderCount)+'h';
              end;
            cut_normal :
              s:=asmprefix+tostr(SmartHeaderCount)+'s';
            cut_end :
              s:=asmprefix+tostr(SmartHeaderCount)+'t';
          end;
          inc(SmartFilesCount);
          result:=ObjOutput.NewObjData(FixFileName(s+tostr(SmartFilesCount)+target_info.objext));
          ObjOutput.startobjectfile(Result.Name);
        end;

        procedure WriteObjData(objdata:TObjData);
        begin
          ObjOutput.writeobjectfile(ObjData);
        end;

        procedure StartImport(const dllname:string);
        var
          headlabel,
          idata4label,
          idata5label,
          idata7label : TObjSymbol;
          emptyint    : longint;
          objdata     : TObjData;
          idata2objsection,
          idata4objsection,
          idata5objsection : TObjSection;
        begin
          objdata:=CreateObjData(cut_begin);
          idata2objsection:=objdata.createsection(sec_idata2,'');
          idata4objsection:=objdata.createsection(sec_idata4,'');
          idata5objsection:=objdata.createsection(sec_idata5,'');
          emptyint:=0;
          basedllname:=splitfilename(dllname);
          { idata4 }
          objdata.SetSection(idata4objsection);
          idata4label:=objdata.SymbolDefine(asmprefix+'_names_'+basedllname,AB_GLOBAL,AT_DATA);
          { idata5 }
          objdata.SetSection(idata5objsection);
          idata5label:=objdata.SymbolDefine(asmprefix+'_fixup_'+basedllname,AB_GLOBAL,AT_DATA);
          { idata2 }
          objdata.SetSection(idata2objsection);
          headlabel:=objdata.SymbolDefine(asmprefix+'_head_'+basedllname,AB_GLOBAL,AT_DATA);
          ObjOutput.exportsymbol(headlabel);
          objdata.writereloc(0,sizeof(longint),idata4label,RELOC_RVA);
          objdata.writebytes(emptyint,sizeof(emptyint));
          objdata.writebytes(emptyint,sizeof(emptyint));
          idata7label:=objdata.SymbolRef(asmprefix+'_dll_'+basedllname);
          objdata.writereloc(0,sizeof(longint),idata7label,RELOC_RVA);
          objdata.writereloc(0,sizeof(longint),idata5label,RELOC_RVA);
          WriteObjData(objdata);
          objdata.free;
        end;

        procedure EndImport;
        var
          idata7label : TObjSymbol;
          emptyint : longint;
          objdata     : TObjData;
          idata4objsection,
          idata5objsection,
          idata7objsection : TObjSection;
        begin
          objdata:=CreateObjData(cut_end);
          idata4objsection:=objdata.createsection(sec_idata4,'');
          idata5objsection:=objdata.createsection(sec_idata5,'');
          idata7objsection:=objdata.createsection(sec_idata7,'');
          emptyint:=0;
          { idata4 }
          objdata.SetSection(idata4objsection);
          objdata.writebytes(emptyint,sizeof(emptyint));
          if target_info.system=system_x86_64_win64 then
            objdata.writebytes(emptyint,sizeof(emptyint));
          { idata5 }
          objdata.SetSection(idata5objsection);
          objdata.writebytes(emptyint,sizeof(emptyint));
          if target_info.system=system_x86_64_win64 then
            objdata.writebytes(emptyint,sizeof(emptyint));
          { idata7 }
          objdata.SetSection(idata7objsection);
          idata7label:=objdata.SymbolDefine(asmprefix+'_dll_'+basedllname,AB_GLOBAL,AT_DATA);
          objoutput.exportsymbol(idata7label);
          objdata.writebytes(basedllname[1],length(basedllname));
          objdata.writebytes(emptyint,1);
          WriteObjData(objdata);
          objdata.free;
        end;

        procedure AddImport(const afuncname:string;ordnr:word;isvar:boolean);
        const
{$ifdef x86_64}
          jmpopcode : array[0..2] of byte = (
            $ff,$24,$25
          );
{$else x86_64}
  {$ifdef arm}
          jmpopcode : array[0..7] of byte = (
            $00,$c0,$9f,$e5,    // ldr ip, [pc, #0]
            $00,$f0,$9c,$e5     // ldr pc, [ip]
          );
  {$else arm}
          jmpopcode : array[0..1] of byte = (
            $ff,$25
          );
  {$endif arm}
{$endif x86_64}
          nopopcodes : array[0..1] of byte = (
            $90,$90
          );
        var
          implabel,
          idata2label,
          idata5label,
          idata6label : TObjSymbol;
          emptyint : longint;
          objdata     : TObjData;
          textobjsection,
          idata4objsection,
          idata5objsection,
          idata6objsection,
          idata7objsection : TObjSection;
        begin
          objdata:=CreateObjData(cut_normal);
          if not isvar then
            textobjsection:=objdata.createsection(sec_code,'');
          idata4objsection:=objdata.createsection(sec_idata4,'');
          idata5objsection:=objdata.createsection(sec_idata5,'');
          idata6objsection:=objdata.createsection(sec_idata6,'');
          idata7objsection:=objdata.createsection(sec_idata7,'');
          emptyint:=0;
          { idata7, link to head }
          objdata.SetSection(idata7objsection);
          idata2label:=objdata.SymbolRef(asmprefix+'_head_'+basedllname);
          objdata.writereloc(0,sizeof(longint),idata2label,RELOC_RVA);
          { idata6, import data (ordnr+name) }
          objdata.SetSection(idata6objsection);
          inc(idatalabnr);
          idata6label:=objdata.SymbolDefine(asmprefix+'_'+tostr(idatalabnr),AB_LOCAL,AT_DATA);
          objdata.writebytes(ordnr,2);
          objdata.writebytes(afuncname[1],length(afuncname));
          objdata.writebytes(emptyint,1);
          objdata.writebytes(emptyint,align(objdata.CurrObjSec.size,2)-objdata.CurrObjSec.size);
          { idata4, import lookup table }
          objdata.SetSection(idata4objsection);
          if afuncname<>'' then
            begin
              objdata.writereloc(0,sizeof(longint),idata6label,RELOC_RVA);
              if target_info.system=system_x86_64_win64 then
                objdata.writebytes(emptyint,sizeof(emptyint));
            end
          else
            begin
              emptyint:=ordnr;
              if target_info.system=system_x86_64_win64 then
                begin
                  objdata.writebytes(emptyint,sizeof(emptyint));
                  emptyint:=$80000000;
                  objdata.writebytes(emptyint,sizeof(emptyint));
                end
              else
                begin
                  emptyint:=emptyint or $80000000;
                  objdata.writebytes(emptyint,sizeof(emptyint));
                end;
              emptyint:=0;
            end;
          { idata5, import address table }
          objdata.SetSection(idata5objsection);
          if isvar then
            implabel:=objdata.SymbolDefine(afuncname,AB_GLOBAL,AT_DATA)
          else
            idata5label:=objdata.SymbolDefine(asmprefix+'_'+afuncname,AB_LOCAL,AT_DATA);
          objdata.writereloc(0,sizeof(longint),idata6label,RELOC_RVA);
          if target_info.system=system_x86_64_win64 then
            objdata.writebytes(emptyint,sizeof(emptyint));
          { text, jmp }
          if not isvar then
            begin
              objdata.SetSection(textobjsection);
              if afuncname <> '' then
                implabel:=objdata.SymbolDefine(afuncname,AB_GLOBAL,AT_FUNCTION)
              else
                implabel:=objdata.SymbolDefine(basedllname+'_index_'+tostr(ordnr),AB_GLOBAL,AT_FUNCTION);
              objdata.writebytes(jmpopcode,sizeof(jmpopcode));
              objdata.writereloc(0,sizeof(longint),idata5label,RELOC_ABSOLUTE32);
              objdata.writebytes(nopopcodes,align(objdata.CurrObjSec.size,sizeof(nopopcodes))-objdata.CurrObjSec.size);
            end;
          ObjOutput.exportsymbol(implabel);
          WriteObjData(objdata);
          objdata.free;
        end;

      var
         hp1 : timportList;
         hp2 : twin32imported_item;
      begin
        AsmPrefix:='imp'+Lower(current_module.modulename^);
        idatalabnr:=0;
        SmartFilesCount:=0;
        SmartHeaderCount:=0;
        current_module.linkotherstaticlibs.add(current_module.importlibfilename^,link_always);
        ObjWriter:=TARObjectWriter.create(current_module.importlibfilename^);
        ObjOutput:=TPECoffObjOutput.Create(ObjWriter);
        hp1:=timportlist(current_module.imports.first);
        while assigned(hp1) do
          begin
            StartImport(hp1.dllname^);
            hp2:=twin32imported_item(hp1.imported_items.first);
            while assigned(hp2) do
              begin
                AddImport(hp2.name^,hp2.ordnr,hp2.is_var);
                hp2:=twin32imported_item(hp2.next);
              end;
            EndImport;
            hp1:=timportlist(hp1.next);
          end;
        ObjOutput.Free;
        ObjWriter.Free;
      end;


    procedure timportlibwin32.generateidatasection;
      var
         hp1 : timportList;
         hp2 : twin32imported_item;
         l1,l2,l3,l4 {$ifdef ARM} ,l5 {$endif ARM} : tasmlabel;
         importname : string;
         suffix : integer;
         href : treference;
      begin
         if (target_asm.id in [as_i386_masm,as_i386_tasm,as_i386_nasmwin32]) then
           begin
             new_section(current_asmdata.asmlists[al_imports],sec_code,'',0);
             hp1:=timportlist(current_module.imports.first);
             while assigned(hp1) do
               begin
                 hp2:=twin32imported_item(hp1.imported_items.first);
                 while assigned(hp2) do
                   begin
                     current_asmdata.asmlists[al_imports].concat(tai_directive.create(asd_extern,hp2.func^));
                     current_asmdata.asmlists[al_imports].concat(tai_directive.create(asd_nasm_import,hp2.func^+' '+hp1.dllname^+' '+hp2.name^));
                     hp2:=twin32imported_item(hp2.next);
                   end;
                 hp1:=timportlist(hp1.next);
               end;
             exit;
           end;

         hp1:=timportlist(current_module.imports.first);
         while assigned(hp1) do
           begin
              { align al_procedures for the jumps }
              new_section(current_asmdata.asmlists[al_imports],sec_code,'',sizeof(aint));
              { Get labels for the sections }
              current_asmdata.getjumplabel(l1);
              current_asmdata.getjumplabel(l2);
              current_asmdata.getjumplabel(l3);
              new_section(current_asmdata.asmlists[al_imports],sec_idata2,'',0);
              { pointer to procedure names }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_rva_sym(l2));
              { two empty entries follow }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
              { pointer to dll name }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_rva_sym(l1));
              { pointer to fixups }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_rva_sym(l3));

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

              { first write the name references }
              new_section(current_asmdata.asmlists[al_imports],sec_idata4,'',0);
              current_asmdata.asmlists[al_imports].concat(Tai_label.Create(l2));

              hp2:=twin32imported_item(hp1.imported_items.first);
              while assigned(hp2) do
                begin
                   current_asmdata.getjumplabel(tasmlabel(hp2.lab));
                   if hp2.name^<>'' then
                     begin
                       current_asmdata.asmlists[al_imports].concat(Tai_const.Create_rva_sym(hp2.lab));
                       if target_info.system=system_x86_64_win64 then
                         current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
                     end
                   else
                     begin
                       if target_info.system=system_x86_64_win64 then
                         current_asmdata.asmlists[al_imports].concat(Tai_const.Create_64bit(int64($8000000000000000) or hp2.ordnr))
                       else
                         current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(longint($80000000) or hp2.ordnr));
                     end;
                   hp2:=twin32imported_item(hp2.next);
                end;
              { finalize the names ... }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
              if target_info.system=system_x86_64_win64 then
                current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));

              { then the addresses and create also the indirect jump }
              new_section(current_asmdata.asmlists[al_imports],sec_idata5,'',0);
              current_asmdata.asmlists[al_imports].concat(Tai_label.Create(l3));

              hp2:=twin32imported_item(hp1.imported_items.first);
              while assigned(hp2) do
                begin
                   if not hp2.is_var then
                    begin
                      current_asmdata.getjumplabel(l4);
                    {$ifdef ARM}
                      current_asmdata.getjumplabel(l5);
                    {$endif ARM}
                      { create indirect jump and }
                      { place jump in al_procedures }
                      new_section(current_asmdata.asmlists[al_imports],sec_code,'',0);
                      if hp2.name^ <> '' then
                        current_asmdata.asmlists[al_imports].concat(Tai_symbol.Createname_global(hp2.name^,AT_FUNCTION,0))
                      else
                        current_asmdata.asmlists[al_imports].concat(Tai_symbol.Createname_global(splitfilename(hp1.dllname^)+'_index_'+tostr(hp2.ordnr),AT_FUNCTION,0));
                      current_asmdata.asmlists[al_imports].concat(tai_function_name.create(''));
                    {$ifdef ARM}
                      reference_reset_symbol(href,l5,0);
                      current_asmdata.asmlists[al_imports].concat(Taicpu.op_reg_ref(A_LDR,NR_R12,href));
                      reference_reset_base(href,NR_R12,0);
                      current_asmdata.asmlists[al_imports].concat(Taicpu.op_reg_ref(A_LDR,NR_R15,href));
                      current_asmdata.asmlists[al_imports].concat(Tai_label.Create(l5));
                      reference_reset_symbol(href,l4,0);
                      current_asmdata.asmlists[al_imports].concat(tai_const.create_sym_offset(href.symbol,href.offset));
                    {$else ARM}
                      reference_reset_symbol(href,l4,0);
                      current_asmdata.asmlists[al_imports].concat(Taicpu.Op_ref(A_JMP,S_NO,href));
                      current_asmdata.asmlists[al_imports].concat(Tai_align.Create_op(4,$90));
                    {$endif ARM}
                      { add jump field to al_imports }
                      new_section(current_asmdata.asmlists[al_imports],sec_idata5,'',0);
                      if (cs_debuginfo in aktmoduleswitches) then
                       begin
                         if assigned(hp2.name) then
                          begin
                            importname:='__imp_'+hp2.name^;
                            suffix:=0;
                            while assigned(current_asmdata.getasmsymbol(importname)) do
                             begin
                               inc(suffix);
                               importname:='__imp_'+hp2.name^+'_'+tostr(suffix);
                             end;
                            current_asmdata.asmlists[al_imports].concat(tai_symbol.createname(importname,AT_FUNCTION,4));
                          end
                         else
                          begin
                            importname:='__imp_by_ordinal'+tostr(hp2.ordnr);
                            suffix:=0;
                            while assigned(current_asmdata.getasmsymbol(importname)) do
                             begin
                               inc(suffix);
                               importname:='__imp_by_ordinal'+tostr(hp2.ordnr)+'_'+tostr(suffix);
                             end;
                            current_asmdata.asmlists[al_imports].concat(tai_symbol.createname(importname,AT_FUNCTION,4));
                          end;
                       end;
                      current_asmdata.asmlists[al_imports].concat(Tai_label.Create(l4));
                    end
                   else
                    begin
                      current_asmdata.asmlists[al_imports].concat(Tai_symbol.Createname_global(hp2.func^,AT_DATA,0));
                    end;
                   current_asmdata.asmlists[al_imports].concat(Tai_const.Create_rva_sym(hp2.lab));
                   if target_info.system=system_x86_64_win64 then
                     current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
                   hp2:=twin32imported_item(hp2.next);
                end;
              { finalize the addresses }
              current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));
              if target_info.system=system_x86_64_win64 then
                current_asmdata.asmlists[al_imports].concat(Tai_const.Create_32bit(0));

              { finally the import information }
              new_section(current_asmdata.asmlists[al_imports],sec_idata6,'',0);
              hp2:=twin32imported_item(hp1.imported_items.first);
              while assigned(hp2) do
                begin
                   current_asmdata.asmlists[al_imports].concat(Tai_label.Create(hp2.lab));
                   { the ordinal number }
                   current_asmdata.asmlists[al_imports].concat(Tai_const.Create_16bit(hp2.ordnr));
                   current_asmdata.asmlists[al_imports].concat(Tai_string.Create(hp2.name^+#0));
                   current_asmdata.asmlists[al_imports].concat(Tai_align.Create_op(2,0));
                   hp2:=twin32imported_item(hp2.next);
                end;
              { create import dll name }
              new_section(current_asmdata.asmlists[al_imports],sec_idata7,'',0);
              current_asmdata.asmlists[al_imports].concat(Tai_label.Create(l1));
              current_asmdata.asmlists[al_imports].concat(Tai_string.Create(hp1.dllname^+#0));

              hp1:=timportlist(hp1.next);
           end;
      end;


    procedure timportlibwin32.generatelib;
      begin
        if GenerateImportSection then
          generateidatasection
        else
          generateimportlib;
      end;


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

    procedure texportlibwin32.preparelib(const s:string);
      begin
         if current_asmdata.asmlists[al_exports]=nil then
           current_asmdata.asmlists[al_exports]:=TAsmList.create;
         EList_indexed:=tFPList.Create;
         EList_nonindexed:=tFPList.Create;
         current_asmdata.getdatalabel(edatalabel);
      end;


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

    var
      Gl_DoubleIndex:boolean;
      Gl_DoubleIndexValue:longint;

    function IdxCompare(Item1, Item2: Pointer): Integer;
      var
        I1:texported_item absolute Item1;
        I2:texported_item absolute Item2;
      begin
        Result:=I1.index-I2.index;
        if(Result=0)and(Item1<>Item2)then
         begin
          Gl_DoubleIndex:=true;
          Gl_DoubleIndexValue:=I1.index;
         end;
      end;


    procedure texportlibwin32.exportprocedure(hp : texported_item);
      begin
        if ((hp.options and eo_index)<>0)and((hp.index<=0) or (hp.index>$ffff)) then
          begin
           message1(parser_e_export_invalid_index,tostr(hp.index));
           exit;
          end;
        if hp.options and eo_index=eo_index then
          EList_indexed.Add(hp)
        else
          EList_nonindexed.Add(hp);
      end;


    procedure texportlibwin32.exportfromlist(hp : texported_item);
      //formerly texportlibwin32.exportprocedure
      { must be ordered at least for win32 !! }
      var
        hp2 : texported_item;
      begin
        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 hp2=nil then
          current_module._exports.concat(hp)
        else
          begin
            if hp2.name^=hp.name^ then
              begin
                { this is not allowed !! }
                message1(parser_e_export_name_double,hp.name^);
                exit;
              end;
            current_module._exports.insertbefore(hp,hp2);
          end;
      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 : tasmlabel;
         export_name_table_pointers,export_ordinal_table : tasmlabel;
         hp,hp2 : texported_item;
         temtexport : TLinkedList;
         address_table,name_table_pointers,
         name_table,ordinal_table : TAsmList;
         i,autoindex,ni_high : longint;
         hole : boolean;

      begin
         Gl_DoubleIndex:=false;
         ELIst_indexed.Sort(@IdxCompare);

         if Gl_DoubleIndex then
           begin
             message1(parser_e_export_ordinal_double,tostr(Gl_DoubleIndexValue));
             EList_indexed.Free;
             EList_nonindexed.Free;
             exit;
           end;

         autoindex:=1;
         while EList_nonindexed.Count>0 do
          begin
           hole:=(EList_indexed.Count>0)and(texported_item(EList_indexed.Items[0]).index>1);
           if not hole then
            for i:=autoindex to pred(EList_indexed.Count)do
             if texported_item(EList_indexed.Items[i]).index-texported_item(EList_indexed.Items[pred(i)]).index>1 then
              begin
               autoindex:=succ(texported_item(EList_indexed.Items[pred(i)]).index);
               hole:=true;
               break;
              end;
           ni_high:=pred(EList_nonindexed.Count);
           if not hole then
            begin
             autoindex:=succ(EList_indexed.Count);
             EList_indexed.Add(EList_nonindexed.Items[ni_high]);
            end
           else
            EList_indexed.Insert(pred(AutoIndex),EList_nonindexed.Items[ni_high]);
           EList_nonindexed.Delete(ni_high);
           texported_item(EList_indexed.Items[pred(AutoIndex)]).index:=autoindex;
          end;
         EList_nonindexed.Free;
         for i:=0 to pred(EList_indexed.Count)do
          exportfromlist(texported_item(EList_indexed.Items[i]));
         EList_indexed.Free;

         if (target_asm.id in [as_i386_masm,as_i386_tasm,as_i386_nasmwin32]) then
          begin
            generatenasmlib;
            exit;
          end;

         hp:=texported_item(current_module._exports.first);
         if not assigned(hp) then
           exit;

         ordinal_max:=0;
         ordinal_min:=$7FFFFFFF;
         entries:=0;
         named_entries:=0;
         current_asmdata.getjumplabel(dll_name_label);
         current_asmdata.getjumplabel(export_address_table);
         current_asmdata.getjumplabel(export_name_table_pointers);
         current_asmdata.getjumplabel(export_ordinal_table);

         { 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:=texported_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;

         new_section(current_asmdata.asmlists[al_exports],sec_edata,'',0);
         { create label to reference from main so smartlink will include
           the .edata section }
         current_asmdata.asmlists[al_exports].concat(Tai_symbol.Create_global(edatalabel,0));
         { export flags }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_32bit(0));
         { date/time stamp }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_32bit(0));
         { major version }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_16bit(0));
         { minor version }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_16bit(0));
         { pointer to dll name }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_rva_sym(dll_name_label));
         { ordinal base normally set to 1 }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_32bit(ordinal_base));
         { number of entries }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_32bit(entries));
         { number of named entries }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_32bit(named_entries));
         { address of export address table }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_rva_sym(export_address_table));
         { address of name pointer pointers }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_rva_sym(export_name_table_pointers));
         { address of ordinal number pointers }
         current_asmdata.asmlists[al_exports].concat(Tai_const.Create_rva_sym(export_ordinal_table));
         { the name }
         current_asmdata.asmlists[al_exports].concat(Tai_label.Create(dll_name_label));
         if st='' then
           current_asmdata.asmlists[al_exports].concat(Tai_string.Create(current_module.modulename^+target_info.sharedlibext+#0))
         else
           current_asmdata.asmlists[al_exports].concat(Tai_string.Create(st+target_info.sharedlibext+#0));

         {  export address table }
         address_table:=TAsmList.create;
         address_table.concat(Tai_align.Create_op(4,0));
         address_table.concat(Tai_label.Create(export_address_table));
         name_table_pointers:=TAsmList.create;
         name_table_pointers.concat(Tai_align.Create_op(4,0));
         name_table_pointers.concat(Tai_label.Create(export_name_table_pointers));
         ordinal_table:=TAsmList.create;
         ordinal_table.concat(Tai_align.Create_op(4,0));
         ordinal_table.concat(Tai_label.Create(export_ordinal_table));
         name_table:=TAsmList.Create;
         name_table.concat(Tai_align.Create_op(4,0));
         { write each address }
         hp:=texported_item(current_module._exports.first);
         while assigned(hp) do
           begin
              if (hp.options and eo_name)<>0 then
                begin
                   current_asmdata.getjumplabel(name_label);
                   name_table_pointers.concat(Tai_const.Create_rva_sym(name_label));
                   ordinal_table.concat(Tai_const.Create_16bit(hp.index-ordinal_base));
                   name_table.concat(Tai_align.Create_op(2,0));
                   name_table.concat(Tai_label.Create(name_label));
                   name_table.concat(Tai_string.Create(hp.name^+#0));
                end;
              hp:=texported_item(hp.next);
           end;
         { order in increasing ordinal values }
         { into temtexport list }
         temtexport:=TLinkedList.Create;
         hp:=texported_item(current_module._exports.first);
         while assigned(hp) do
           begin
              current_module._exports.remove(hp);
              hp2:=texported_item(temtexport.first);
              while assigned(hp2) and (hp.index>hp2.index) do
                hp2:=texported_item(hp2.next);
              if hp2=nil then
                temtexport.concat(hp)
              else
                temtexport.insertbefore(hp,hp2);
              hp:=texported_item(current_module._exports.first);;
           end;

         { write the export adress table }
         current_index:=ordinal_base;
         hp:=texported_item(temtexport.first);
         while assigned(hp) do
           begin
              { fill missing values }
              while current_index<hp.index do
                begin
                   address_table.concat(Tai_const.Create_32bit(0));
                   inc(current_index);
                end;
              case hp.sym.typ of
                globalvarsym :
                  address_table.concat(Tai_const.Createname_rva(tglobalvarsym(hp.sym).mangledname));
                typedconstsym :
                  address_table.concat(Tai_const.Createname_rva(ttypedconstsym(hp.sym).mangledname));
                procsym :
                  address_table.concat(Tai_const.Createname_rva(tprocsym(hp.sym).first_procdef.mangledname));
              end;
              inc(current_index);
              hp:=texported_item(hp.next);
           end;

         current_asmdata.asmlists[al_exports].concatlist(address_table);
         current_asmdata.asmlists[al_exports].concatlist(name_table_pointers);
         current_asmdata.asmlists[al_exports].concatlist(ordinal_table);
         current_asmdata.asmlists[al_exports].concatlist(name_table);
         address_table.Free;
         name_table_pointers.free;
         ordinal_table.free;
         name_table.free;
         temtexport.free;
      end;


    procedure texportlibwin32.generatenasmlib;
      var
         hp : texported_item;
         p  : pchar;
         s  : string;
      begin
         new_section(current_asmdata.asmlists[al_exports],sec_code,'',0);
         hp:=texported_item(current_module._exports.first);
         while assigned(hp) do
           begin
             case hp.sym.typ of
               globalvarsym :
                 s:=tglobalvarsym(hp.sym).mangledname;
               typedconstsym :
                 s:=ttypedconstsym(hp.sym).mangledname;
               procsym :
                 s:=tprocsym(hp.sym).first_procdef.mangledname;
               else
                 s:='';
             end;
             p:=strpnew(#9+'export '+s+' '+hp.name^+' '+tostr(hp.index));
             {current_asmdata.asmlists[al_exports].concat(tai_direct.create(p));}
             hp:=texported_item(hp.next);
           end;
      end;


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


Constructor TLinkerWin32.Create;
begin
  Inherited Create;
  { allow duplicated libs (PM) }
  SharedLibFiles.doubles:=true;
  StaticLibFiles.doubles:=true;  if not Dontlinkstdlibpath Then
end;


Procedure TLinkerWin32.SetDefaultInfo;
var
  targetopts: string;
begin
  with Info do
   begin
     {$ifdef ARM}
       targetopts:='-m armpe';
     {$else ARM}
       targetopts:='-b pe-i386 -m i386pe';
     {$endif ARM}
     ExeCmd[1]:='ld '+targetopts+' $OPT $GCSECTIONS $MAP $STRIP $APPTYPE $ENTRY  $IMAGEBASE $RELOC -o $EXE $RES';
     DllCmd[1]:='ld '+targetopts+' $OPT $GCSECTIONS $MAP $STRIP --dll $APPTYPE $ENTRY  $IMAGEBASE $RELOC -o $EXE $RES';
     { 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]:='ld '+targetopts+' $OPT $STRIP $APPTYPE $ENTRY $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.$$$ $RELOC $DEF';
     DllCmd[3]:='ld '+targetopts+' $OPT $STRIP --dll $APPTYPE $ENTRY  $IMAGEBASE -o $EXE $RES exp.$$$';
   end;
end;



Function TLinkerWin32.WriteResponseFile(isdll:boolean) : Boolean;
Var
  linkres : TLinkRes;
  HPath   : TStringListItem;
  s,s2    : string;
  i       : integer;
  linklibcygwin : boolean;
begin
  WriteResponseFile:=False;
  linklibcygwin:=(SharedLibFiles.Find('cygwin')<>nil);

  if (cs_profile in aktmoduleswitches) then
    begin
      SharedLibFiles.Concat('gmon');
      SharedLibFiles.Concat('c');
      SharedLibFiles.Concat('gcc');
      SharedLibFiles.Concat('kernel32');
    end;

  { Open link.res file }
  LinkRes:=TLinkres.Create(outputexedir+Info.ResName);
  with linkres do
    begin
      { Write path to search libraries }
      HPath:=TStringListItem(current_module.locallibrarysearchpath.First);
      while assigned(HPath) do
       begin
         Add('SEARCH_DIR('+MaybeQuoted(HPath.Str)+')');
         HPath:=TStringListItem(HPath.Next);
       end;
      HPath:=TStringListItem(LibrarySearchPath.First);
      while assigned(HPath) do
       begin
         Add('SEARCH_DIR('+MaybeQuoted(HPath.Str)+')');
         HPath:=TStringListItem(HPath.Next);
       end;

      { add objectfiles, start with prt0 always                  }
      { profiling of shared libraries is currently not supported }
      if not ObjectFiles.Empty then
        begin
          Add('INPUT(');
          while not ObjectFiles.Empty do
           begin
             s:=ObjectFiles.GetFirst;
             if s<>'' then
              AddFileName(MaybeQuoted(s));
           end;
          Add(')');
        end;

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

      { Write sharedlibraries (=import libraries) }
      if not SharedLibFiles.Empty then
       begin
         Add('INPUT(') ;
         While not SharedLibFiles.Empty do
          begin
            S:=SharedLibFiles.GetFirst;
            if FindLibraryFile(s,target_info.staticClibprefix,target_info.staticClibext,s2) then
              begin
                Add(MaybeQuoted(s2));
                continue;
              end;
            if pos(target_info.sharedlibprefix,s)=1 then
              s:=copy(s,length(target_info.sharedlibprefix)+1,255);
            i:=Pos(target_info.sharedlibext,S);
            if i>0 then
             Delete(S,i,255);
            Add('-l'+s);
          end;
         Add(')');
       end;

      Add('SEARCH_DIR("/usr/i686-pc-cygwin/lib"); SEARCH_DIR("/usr/lib"); SEARCH_DIR("/usr/lib/w32api");');
      Add('OUTPUT_FORMAT(pei-i386)');
      Add('ENTRY(_mainCRTStartup)');
      Add('SECTIONS');
      Add('{');
      Add('  . = SIZEOF_HEADERS;');
      Add('  . = ALIGN(__section_alignment__);');
      Add('  .text  __image_base__ + ( __section_alignment__ < 0x1000 ? . : __section_alignment__ ) :');
      Add('  {');
{$ifdef arm}
      Add('    *(.pdata.FPC_EH_PROLOG)');
{$endif arm}
      Add('    *(.init)');
      add('    *(.text .stub .text.* .gnu.linkonce.t.*)');
      Add('    *(SORT(.text$*))');
      Add('     ___CTOR_LIST__ = .; __CTOR_LIST__ = . ;');
      Add('			LONG (-1);*(.ctors); *(.ctor); *(SORT(.ctors.*));  LONG (0);');
      Add('     ___DTOR_LIST__ = .; __DTOR_LIST__ = . ;');
      Add('			LONG (-1); *(.dtors); *(.dtor); *(SORT(.dtors.*));  LONG (0);');
      Add('     *(.fini)');
      Add('    PROVIDE (etext = .);');
      Add('    *(.gcc_except_table)');
      Add('  }');
      Add('  .data BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    __data_start__ = . ;');
      add('    *(.data .data.* .gnu.linkonce.d.*)');
      Add('    *(.data2)');
      Add('    *(SORT(.data$*))');
      Add('    __data_end__ = . ;');
      Add('    *(.data_cygwin_nocopy)');
      Add('  }');
      Add('  .rdata BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    *(.rdata)');
      add('    *(.rodata .rodata.* .gnu.linkonce.r.*)');
      Add('    *(SORT(.rdata$*))');
      Add('    *(.eh_frame)');
      Add('    ___RUNTIME_PSEUDO_RELOC_LIST__ = .;');
      Add('    __RUNTIME_PSEUDO_RELOC_LIST__ = .;');
      Add('    *(.rdata_runtime_pseudo_reloc)');
      Add('    ___RUNTIME_PSEUDO_RELOC_LIST_END__ = .;');
      Add('    __RUNTIME_PSEUDO_RELOC_LIST_END__ = .;');
      Add('  }');
      Add('  .pdata BLOCK(__section_alignment__) : { *(.pdata) }');
      Add('  .bss BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    __bss_start__ = . ;');
      Add('    *(.bss .bss.* .gnu.linkonce.b.*)');
      Add('    *(SORT(.bss$*))');
      Add('    *(COMMON)');
      Add('    __bss_end__ = . ;');
      Add('  }');
      Add('  .edata BLOCK(__section_alignment__) : { *(.edata) }');
      Add('  .idata BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    SORT(*)(.idata$2)');
      Add('    SORT(*)(.idata$3)');
      Add('    /* These zeroes mark the end of the import list.  */');
      Add('    LONG (0); LONG (0); LONG (0); LONG (0); LONG (0);');
      Add('    SORT(*)(.idata$4)');
      Add('    SORT(*)(.idata$5)');
      Add('    SORT(*)(.idata$6)');
      Add('    SORT(*)(.idata$7)');
      Add('  }');
      Add('  .CRT BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    ___crt_xc_start__ = . ;');
      Add('    *(SORT(.CRT$XC*))  /* C initialization */');
      Add('    ___crt_xc_end__ = . ;');
      Add('    ___crt_xi_start__ = . ;');
      Add('    *(SORT(.CRT$XI*))  /* C++ initialization */');
      Add('    ___crt_xi_end__ = . ;');
      Add('    ___crt_xl_start__ = . ;');
      Add('    *(SORT(.CRT$XL*))  /* TLS callbacks */');
      Add('    /* ___crt_xl_end__ is defined in the TLS Directory support code */');
      Add('    ___crt_xp_start__ = . ;');
      Add('    *(SORT(.CRT$XP*))  /* Pre-termination */');
      Add('    ___crt_xp_end__ = . ;');
      Add('    ___crt_xt_start__ = . ;');
      Add('    *(SORT(.CRT$XT*))  /* Termination */');
      Add('    ___crt_xt_end__ = . ;');
      Add('  }');
      Add('  .tls BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    ___tls_start__ = . ;');
      Add('    *(.tls .tls.*)');
      Add('    *(.tls$)');
      Add('    *(SORT(.tls$*))');
      Add('    ___tls_end__ = . ;');
      Add('  }');
      Add('  .rsrc BLOCK(__section_alignment__) :');
      Add('  {');
      Add('    *(.rsrc)');
      Add('    *(SORT(.rsrc$*))');
      Add('  }');
      Add('  .reloc BLOCK(__section_alignment__) : { *(.reloc) }');
      Add('  .stab BLOCK(__section_alignment__) (NOLOAD) : { *(.stab) }');
      Add('  .stabstr BLOCK(__section_alignment__) (NOLOAD) : { *(.stabstr) }');
      Add('  .debug_aranges BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_aranges) }');
      Add('  .debug_pubnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_pubnames) }');
      Add('  .debug_info BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_info) *(.gnu.linkonce.wi.*) }');
      Add('  .debug_abbrev BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_abbrev) }');
      Add('  .debug_line BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_line) }');
      Add('  .debug_frame BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_frame) }');
      Add('  .debug_str BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_str) }');
      Add('  .debug_loc BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_loc) }');
      Add('  .debug_macinfo BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_macinfo) }');
      Add('  .debug_weaknames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_weaknames) }');
      Add('  .debug_funcnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_funcnames) }');
      Add('  .debug_typenames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_typenames) }');
      Add('  .debug_varnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_varnames) }');
      Add('  .debug_ranges BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_ranges) }');
      Add('}');

      { Write and Close response }
      writetodisk;
      Free;
    end;

  WriteResponseFile:=True;
end;


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

{ Create some replacements }
  RelocStr:='';
  AppTypeStr:='';
  EntryStr:='';
  ImageBaseStr:='';
  StripStr:='';
  MapStr:='';
  GCSectionsStr:='';
  AsBinStr:=FindUtil(utilsprefix+'as');
  if RelocSection then
    RelocStr:='--base-file base.$$$';
  if use_smartlink_section then
    GCSectionsStr:='--gc-sections';
  if target_info.system in [system_arm_wince,system_i386_wince] then
    AppTypeStr:='--subsystem wince'
  else
    begin
      if apptype=app_gui then
        AppTypeStr:='--subsystem windows';
    end;
  if apptype=app_gui then
    EntryStr:='--entry=_WinMainCRTStartup'
  else
    EntryStr:='--entry=_mainCRTStartup';
  if assigned(DLLImageBase) then
    ImageBaseStr:='--image-base=0x'+DLLImageBase^;
  if (cs_link_strip in aktglobalswitches) then
    StripStr:='-s';
  if (cs_link_map in aktglobalswitches) then
    MapStr:='-Map '+maybequoted(ForceExtension(current_module.exefilename^,'.map'));

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

{ Call linker }
  success:=false;
  if RelocSection or (not Deffile.empty) then
    cmds:=3
  else
    cmds:=1;
  for i:=1 to cmds do
   begin
     SplitBinCmd(Info.ExeCmd[i],binstr,cmdstr);
     if binstr<>'' then
      begin
        Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
        Replace(cmdstr,'$OPT',Info.ExtraOptions);
        Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
        Replace(cmdstr,'$APPTYPE',AppTypeStr);
        Replace(cmdstr,'$ENTRY',EntryStr);
        Replace(cmdstr,'$ASBIN',AsbinStr);
        Replace(cmdstr,'$RELOC',RelocStr);
        Replace(cmdstr,'$IMAGEBASE',ImageBaseStr);
        Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
        Replace(cmdstr,'$STRIP',StripStr);
        Replace(cmdstr,'$MAP',MapStr);
        if not DefFile.Empty then
          begin
            DefFile.WriteFile;
            Replace(cmdstr,'$DEF','-d '+maybequoted(deffile.fname));
          end
        else
          Replace(cmdstr,'$DEF','');
        success:=DoExec(FindUtil(utilsprefix+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_nolink in aktglobalswitches) then
   begin
     RemoveFile(outputexedir+Info.ResName);
     RemoveFile('base.$$$');
     RemoveFile('exp.$$$');
     RemoveFile('deffile.$$$');
   end;

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


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

{ Create some replacements }
  RelocStr:='';
  AppTypeStr:='';
  EntryStr:='';
  ImageBaseStr:='';
  StripStr:='';
  MapStr:='';
  GCSectionsStr:='';
  AsBinStr:=FindUtil(utilsprefix+'as');
  if RelocSection then
   RelocStr:='--base-file base.$$$';
  if use_smartlink_section then
   GCSectionsStr:='--gc-sections';
  if apptype=app_gui then
    begin
      AppTypeStr:='--subsystem windows';
      EntryStr:='--entry _DLLWinMainCRTStartup'
    end
  else
    EntryStr:='--entry _DLLMainCRTStartup';
  if assigned(DLLImageBase) then
    ImageBaseStr:='--image-base=0x'+DLLImageBase^;
  if (cs_link_strip in aktglobalswitches) then
    StripStr:='-s';
  if (cs_link_map in aktglobalswitches) then
    MapStr:='-Map '+maybequoted(ForceExtension(current_module.exefilename^,'.map'));

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

{ Call linker }
  success:=false;
  if RelocSection or (not Deffile.empty) then
    cmds:=3
  else
    cmds:=1;
  for i:=1 to cmds do
   begin
     SplitBinCmd(Info.DllCmd[i],binstr,cmdstr);
     if binstr<>'' then
      begin
        Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
        Replace(cmdstr,'$OPT',Info.ExtraOptions);
        Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
        Replace(cmdstr,'$APPTYPE',AppTypeStr);
        Replace(cmdstr,'$ENTRY',EntryStr);
        Replace(cmdstr,'$ASBIN',AsbinStr);
        Replace(cmdstr,'$RELOC',RelocStr);
        Replace(cmdstr,'$IMAGEBASE',ImageBaseStr);
        Replace(cmdstr,'$STRIP',StripStr);
        Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
        Replace(cmdstr,'$MAP',MapStr);
        if not DefFile.Empty then
          begin
            DefFile.WriteFile;
            Replace(cmdstr,'$DEF','-d '+maybequoted(deffile.fname));
          end
        else
          Replace(cmdstr,'$DEF','');
        success:=DoExec(FindUtil(utilsprefix+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_nolink in aktglobalswitches) then
   begin
     RemoveFile(outputexedir+Info.ResName);
     RemoveFile('base.$$$');
     RemoveFile('exp.$$$');
     RemoveFile('deffile.$$$');
   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..$80] of byte;
  end;
  tcoffsechdr=packed record
    name     : array[0..7] of char;
    vsize    : longint;
    rvaofs   : longint;
    datalen  : longint;
    datapos  : longint;
    relocpos : longint;
    lineno1  : longint;
    nrelocs  : word;
    lineno2  : word;
    flags    : longint;
  end;
  psecfill=^TSecfill;
  TSecfill=record
    fillpos,
    fillsize : longint;
    next : psecfill;
  end;
var
  f : file;
  cmdstr : string;
  dosheader : tdosheader;
  peheader : tpeheader;
  firstsecpos,
  maxfillsize,
  l,peheaderpos : longint;
  coffsec : tcoffsechdr;
  secroot,hsecroot : psecfill;
  zerobuf : pointer;
begin
  postprocessexecutable:=false;
  { when -s is used or it's a dll then quit }
  if (cs_link_nolink in aktglobalswitches) then
   begin
     case apptype of
       app_native :
         cmdstr:='--subsystem native';
       app_gui :
         cmdstr:='--subsystem gui';
       app_cui :
         cmdstr:='--subsystem console';
     end;
     if dllversion<>'' then
       cmdstr:=cmdstr+' --version '+dllversion;
     cmdstr:=cmdstr+' --input '+maybequoted(fn);
     cmdstr:=cmdstr+' --stack '+tostr(stacksize);
     DoExec(FindUtil(utilsprefix+'postw32'),cmdstr,false,false);
     postprocessexecutable:=true;
     exit;
   end;
  { open file }
  assign(f,fn);
  {$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 }
  { wincegui=9 }
  if target_info.system in [system_arm_wince,system_i386_wince] then
    peheader.Subsystem:=9
  else
    case apptype of
      app_native :
        peheader.Subsystem:=1;
      app_gui :
        peheader.Subsystem:=2;
      app_cui :
        peheader.Subsystem:=3;
    end;
  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:=1 to 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;


{****************************************************************************
                            TDLLScannerWin32
****************************************************************************}

    procedure tDLLScannerWin32.CheckDLLFunc(const dllname,funcname:string);
      var
        hp : tExternalsItem;
      begin
        hp:=tExternalsItem(current_module.Externals.first);
        while assigned(hp)do
          begin
            if (not hp.found) and
               assigned(hp.data) and
               (hp.data^=funcname) then
              begin
                hp.found:=true;
                if not(current_module.uses_imports) then
                  begin
                    current_module.uses_imports:=true;
                    importlib.preparelib(current_module.modulename^);
                  end;
                timportlibwin32(importlib).importprocedure_str(dllname,0,funcname);
                importfound:=true;
                exit;
              end;
            hp:=tExternalsItem(hp.next);
          end;
      end;


    function tDLLScannerWin32.scan(const binname:string):boolean;
      var
        hs,
        dllname : string;
      begin
        result:=false;
        { is there already an import library the we will use that one }
        if FindLibraryFile(binname,target_info.staticClibprefix,target_info.staticClibext,hs) then
          exit;
        { check if we can find the dll }
        hs:=AddExtension(binname,target_info.sharedlibext);
        if not FindDll(hs,dllname) then
          exit;
        importfound:=false;
        ReadDLLImports(dllname,@CheckDLLFunc);
        result:=importfound;
      end;


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

initialization
{$ifdef i386}
  RegisterExternalLinker(system_i386_win32_info,TLinkerWin32);
  RegisterInternalLinker(system_i386_win32_info,TPECoffLinker);
  RegisterImport(system_i386_win32,TImportLibWin32);
  RegisterExport(system_i386_win32,TExportLibWin32);
  RegisterDLLScanner(system_i386_win32,TDLLScannerWin32);
  RegisterRes(res_gnu_windres_info);
  RegisterTarget(system_i386_win32_info);

  RegisterExternalLinker(system_i386_wince_info,TLinkerWin32);
  RegisterImport(system_i386_wince,TImportLibWin32);
  RegisterExport(system_i386_wince,TExportLibWin32);
  RegisterDLLScanner(system_i386_wince,TDLLScannerWin32);
  RegisterTarget(system_i386_wince_info);
{$endif i386}
{$ifdef x86_64}
  RegisterInternalLinker(system_x64_win64_info,TPECoffLinker);
  RegisterImport(system_x86_64_win64,TImportLibWin32);
  RegisterExport(system_x86_64_win64,TExportLibWin32);
  RegisterDLLScanner(system_x86_64_win64,TDLLScannerWin32);
  RegisterRes(res_gnu_windres_info);
  RegisterTarget(system_x64_win64_info);
{$endif x86_64}
{$ifdef arm}
  RegisterExternalLinker(system_arm_wince_info,TLinkerWin32);
  RegisterInternalLinker(system_arm_wince_info,TPECoffLinker);
  RegisterImport(system_arm_wince,TImportLibWin32);
  RegisterExport(system_arm_wince,TExportLibWin32);
  RegisterRes(res_gnu_wince_windres_info);
  RegisterTarget(system_arm_wince_info);
{$endif arm}
end.