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301 lines
8.1 KiB
ObjectPascal
301 lines
8.1 KiB
ObjectPascal
{
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This unit implements support import,export,link routines
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for the (arm) GameBoy Advance target
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Copyright (c) 2001-2002 by Peter Vreman
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit t_gba;
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{$i fpcdefs.inc}
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interface
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uses
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symsym,symdef,
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import,export,link;
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type
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tlinkergba=class(texternallinker)
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private
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libctype:(libc5,glibc2,glibc21,uclibc);
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Function WriteResponseFile : Boolean;
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public
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constructor Create;override;
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procedure SetDefaultInfo;override;
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function MakeExecutable:boolean;override;
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end;
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implementation
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uses
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cutils,cclasses,verbose,systems,globtype,globals,
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symconst,script,fmodule,dos,aasmbase,aasmtai,aasmcpu,
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cpubase,cgobj,i_gba;
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{*****************************************************************************
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TLINKERLINUX
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*****************************************************************************}
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Constructor TLinkerGba.Create;
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begin
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Inherited Create;
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if not Dontlinkstdlibpath Then
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LibrarySearchPath.AddPath('/lib;/usr/lib;/usr/X11R6/lib',true);
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end;
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procedure TLinkerGba.SetDefaultInfo;
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{
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This will also detect which libc version will be used
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}
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begin
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with Info do
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begin
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//ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE $RES';
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// Here we call ld with right options for GBA
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ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -Ttext 0x08000000 -Tbss 0x03000000 -L. -o $EXE $RES';
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DllCmd[1]:='ld $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES';
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DllCmd[2]:='strip --strip-unneeded $EXE';
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DynamicLinker:='/lib/ld-linux.so.2';
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libctype:=glibc2;
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end;
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end;
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Function TLinkerGba.WriteResponseFile: Boolean;
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Var
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linkres : TLinkRes;
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i : longint;
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cprtobj,
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gprtobj,
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prtobj : string[80];
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HPath : TStringListItem;
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s,s1,s2 : string;
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found1,
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found2,
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linklibc : boolean;
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begin
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WriteResponseFile:=False;
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{ set special options for some targets }
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linklibc:=(SharedLibFiles.Find('c')<>nil);
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prtobj:='prt0';
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case libctype of
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glibc21:
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begin
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cprtobj:='cprt21';
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gprtobj:='gprt21';
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end;
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uclibc:
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begin
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cprtobj:='ucprt0';
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gprtobj:='ugprt0';
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end
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else
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cprtobj:='cprt0';
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gprtobj:='gprt0';
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end;
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if cs_profile in aktmoduleswitches then
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begin
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prtobj:=gprtobj;
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if not(libctype in [glibc2,glibc21]) then
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AddSharedLibrary('gmon');
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AddSharedLibrary('c');
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linklibc:=true;
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end
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else
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begin
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if linklibc then
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prtobj:=cprtobj;
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end;
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{ Open link.res file }
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LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
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{ Write path to search libraries }
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HPath:=TStringListItem(current_module.locallibrarysearchpath.First);
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while assigned(HPath) do
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begin
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LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
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HPath:=TStringListItem(HPath.Next);
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end;
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HPath:=TStringListItem(LibrarySearchPath.First);
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while assigned(HPath) do
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begin
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LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
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HPath:=TStringListItem(HPath.Next);
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end;
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LinkRes.Add('INPUT(');
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{ add objectfiles, start with prt0 always }
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if prtobj<>'' then
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LinkRes.AddFileName(maybequoted(FindObjectFile(prtobj,'',false)));
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{ try to add crti and crtbegin if linking to C }
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if linklibc then
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begin
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if librarysearchpath.FindFile('crtbegin.o',s) then
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LinkRes.AddFileName(s);
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if librarysearchpath.FindFile('crti.o',s) then
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LinkRes.AddFileName(s);
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end;
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{ main objectfiles }
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while not ObjectFiles.Empty do
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begin
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s:=ObjectFiles.GetFirst;
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if s<>'' then
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LinkRes.AddFileName(maybequoted(s));
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end;
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LinkRes.Add(')');
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{ Write staticlibraries }
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if not StaticLibFiles.Empty then
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begin
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LinkRes.Add('GROUP(');
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While not StaticLibFiles.Empty do
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begin
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S:=StaticLibFiles.GetFirst;
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LinkRes.AddFileName(maybequoted(s))
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end;
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LinkRes.Add(')');
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end;
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{ Write sharedlibraries like -l<lib>, also add the needed dynamic linker
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here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
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if not SharedLibFiles.Empty then
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begin
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LinkRes.Add('INPUT(');
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While not SharedLibFiles.Empty do
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begin
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S:=SharedLibFiles.GetFirst;
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if s<>'c' then
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begin
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i:=Pos(target_info.sharedlibext,S);
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if i>0 then
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Delete(S,i,255);
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LinkRes.Add('-l'+s);
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end
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else
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begin
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linklibc:=true;
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end;
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end;
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{ be sure that libc is the last lib }
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if linklibc then
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LinkRes.Add('-lc');
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{ when we have -static for the linker the we also need libgcc }
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if (cs_link_staticflag in aktglobalswitches) then
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LinkRes.Add('-lgcc');
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LinkRes.Add(')');
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end;
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{ objects which must be at the end }
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if linklibc and (libctype<>uclibc) then
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begin
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found1:=librarysearchpath.FindFile('crtend.o',s1);
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found2:=librarysearchpath.FindFile('crtn.o',s2);
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if found1 or found2 then
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begin
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LinkRes.Add('INPUT(');
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if found1 then
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LinkRes.AddFileName(s1);
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if found2 then
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LinkRes.AddFileName(s2);
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LinkRes.Add(')');
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end;
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end;
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{ Write and Close response }
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linkres.writetodisk;
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linkres.Free;
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WriteResponseFile:=True;
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end;
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function TLinkerGba.MakeExecutable:boolean;
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var
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binstr : String;
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cmdstr : TCmdStr;
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success : boolean;
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DynLinkStr : string[60];
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GCSectionsStr,
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StaticStr,
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StripStr : string[40];
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begin
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if not(cs_link_extern in aktglobalswitches) then
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Message1(exec_i_linking,current_module.exefilename^);
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{ Create some replacements }
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StaticStr:='';
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StripStr:='';
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GCSectionsStr:='';
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DynLinkStr:='';
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if (cs_link_staticflag in aktglobalswitches) then
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StaticStr:='-static';
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if (cs_link_strip in aktglobalswitches) then
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StripStr:='-s';
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if (cs_link_smart in aktglobalswitches) and
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(tf_smartlink_sections in target_info.flags) then
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GCSectionsStr:='--gc-sections';
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If (cs_profile in aktmoduleswitches) or
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((Info.DynamicLinker<>'') and (not SharedLibFiles.Empty)) then
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begin
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DynLinkStr:='-dynamic-linker='+Info.DynamicLinker;
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if cshared Then
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DynLinkStr:='--shared ' + DynLinkStr;
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if rlinkpath<>'' Then
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DynLinkStr:='--rpath-link '+rlinkpath + ' '+ DynLinkStr;
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End;
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{ Write used files and libraries }
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WriteResponseFile;
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{ Call linker }
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SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
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Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
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Replace(cmdstr,'$OPT',Info.ExtraOptions);
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Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
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Replace(cmdstr,'$STATIC',StaticStr);
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Replace(cmdstr,'$STRIP',StripStr);
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Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
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Replace(cmdstr,'$DYNLINK',DynLinkStr);
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success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
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{ Remove ReponseFile }
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if (success) and not(cs_link_extern in aktglobalswitches) then
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RemoveFile(outputexedir+Info.ResName);
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MakeExecutable:=success; { otherwise a recursive call to link method }
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end;
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{*****************************************************************************
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Initialize
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*****************************************************************************}
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initialization
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RegisterExternalLinker(system_arm_gba_info,TLinkerGba);
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RegisterTarget(system_arm_gba_info);
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end.
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