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+{
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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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+
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+ Copyright (c) 2001-2002 by Peter Vreman
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+
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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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+
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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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+
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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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+}
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+unit t_gba;
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+
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+{$i fpcdefs.inc}
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+
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+
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+interface
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+
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+ uses
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+ symsym,symdef,
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+ import,export,link;
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+
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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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+
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+
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+implementation
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+
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+
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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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+
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+
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+{*****************************************************************************
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+ TLINKERLINUX
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+*****************************************************************************}
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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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+
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+
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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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+
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+
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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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+
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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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+
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+ { Open link.res file }
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+ LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ WriteResponseFile:=True;
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+end;
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+
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+
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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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+
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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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+
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+{ Write used files and libraries }
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+ WriteResponseFile;
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+
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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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+
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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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+
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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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+
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+
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+{*****************************************************************************
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+ Initialize
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+*****************************************************************************}
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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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florian