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{
This unit implements support import,export,link routines
for the (arm) GameBoy Advance target
Copyright (c) 2001-2002 by Peter Vreman
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_gba;
{$i fpcdefs.inc}
interface
uses
symsym,symdef,
import,export,link;
type
tlinkergba=class(texternallinker)
private
libctype:(libc5,glibc2,glibc21,uclibc);
Function WriteResponseFile : Boolean;
public
constructor Create;override;
procedure SetDefaultInfo;override;
function MakeExecutable:boolean;override;
end;
implementation
uses
cutils,cclasses,verbose,systems,globtype,globals,
symconst,script,fmodule,dos,aasmbase,aasmtai,aasmcpu,
cpubase,cgobj,i_gba;
{*****************************************************************************
TLINKERLINUX
*****************************************************************************}
Constructor TLinkerGba.Create;
begin
Inherited Create;
if not Dontlinkstdlibpath Then
LibrarySearchPath.AddPath('/lib;/usr/lib;/usr/X11R6/lib',true);
end;
procedure TLinkerGba.SetDefaultInfo;
{
This will also detect which libc version will be used
}
begin
with Info do
begin
//ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE $RES';
// Here we call ld with right options for GBA
ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -Ttext 0x08000000 -Tbss 0x03000000 -L. -o $EXE $RES';
DllCmd[1]:='ld $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES';
DllCmd[2]:='strip --strip-unneeded $EXE';
DynamicLinker:='/lib/ld-linux.so.2';
libctype:=glibc2;
end;
end;
Function TLinkerGba.WriteResponseFile: Boolean;
Var
linkres : TLinkRes;
i : longint;
cprtobj,
gprtobj,
prtobj : string[80];
HPath : TStringListItem;
s,s1,s2 : string;
found1,
found2,
linklibc : boolean;
begin
WriteResponseFile:=False;
{ set special options for some targets }
linklibc:=(SharedLibFiles.Find('c')<>nil);
prtobj:='prt0';
case libctype of
glibc21:
begin
cprtobj:='cprt21';
gprtobj:='gprt21';
end;
uclibc:
begin
cprtobj:='ucprt0';
gprtobj:='ugprt0';
end
else
cprtobj:='cprt0';
gprtobj:='gprt0';
end;
if cs_profile in aktmoduleswitches then
begin
prtobj:=gprtobj;
if not(libctype in [glibc2,glibc21]) then
AddSharedLibrary('gmon');
AddSharedLibrary('c');
linklibc:=true;
end
else
begin
if linklibc then
prtobj:=cprtobj;
end;
{ Open link.res file }
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
{ Write path to search libraries }
HPath:=TStringListItem(current_module.locallibrarysearchpath.First);
while assigned(HPath) do
begin
LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TStringListItem(HPath.Next);
end;
HPath:=TStringListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TStringListItem(HPath.Next);
end;
LinkRes.Add('INPUT(');
{ add objectfiles, start with prt0 always }
if prtobj<>'' then
LinkRes.AddFileName(maybequoted(FindObjectFile(prtobj,'',false)));
{ try to add crti and crtbegin if linking to C }
if linklibc then
begin
if librarysearchpath.FindFile('crtbegin.o',s) then
LinkRes.AddFileName(s);
if librarysearchpath.FindFile('crti.o',s) then
LinkRes.AddFileName(s);
end;
{ main objectfiles }
while not ObjectFiles.Empty do
begin
s:=ObjectFiles.GetFirst;
if s<>'' then
LinkRes.AddFileName(maybequoted(s));
end;
LinkRes.Add(')');
{ Write staticlibraries }
if not StaticLibFiles.Empty then
begin
LinkRes.Add('GROUP(');
While not StaticLibFiles.Empty do
begin
S:=StaticLibFiles.GetFirst;
LinkRes.AddFileName(maybequoted(s))
end;
LinkRes.Add(')');
end;
{ Write sharedlibraries like -l<lib>, also add the needed dynamic linker
here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
if not SharedLibFiles.Empty then
begin
LinkRes.Add('INPUT(');
While not SharedLibFiles.Empty do
begin
S:=SharedLibFiles.GetFirst;
if s<>'c' then
begin
i:=Pos(target_info.sharedlibext,S);
if i>0 then
Delete(S,i,255);
LinkRes.Add('-l'+s);
end
else
begin
linklibc:=true;
end;
end;
{ be sure that libc is the last lib }
if linklibc then
LinkRes.Add('-lc');
{ when we have -static for the linker the we also need libgcc }
if (cs_link_staticflag in aktglobalswitches) then
LinkRes.Add('-lgcc');
LinkRes.Add(')');
end;
{ objects which must be at the end }
if linklibc and (libctype<>uclibc) then
begin
found1:=librarysearchpath.FindFile('crtend.o',s1);
found2:=librarysearchpath.FindFile('crtn.o',s2);
if found1 or found2 then
begin
LinkRes.Add('INPUT(');
if found1 then
LinkRes.AddFileName(s1);
if found2 then
LinkRes.AddFileName(s2);
LinkRes.Add(')');
end;
end;
{ Write and Close response }
linkres.writetodisk;
linkres.Free;
WriteResponseFile:=True;
end;
function TLinkerGba.MakeExecutable:boolean;
var
binstr : String;
cmdstr : TCmdStr;
success : boolean;
DynLinkStr : string[60];
GCSectionsStr,
StaticStr,
StripStr : string[40];
begin
if not(cs_link_extern in aktglobalswitches) then
Message1(exec_i_linking,current_module.exefilename^);
{ Create some replacements }
StaticStr:='';
StripStr:='';
GCSectionsStr:='';
DynLinkStr:='';
if (cs_link_staticflag in aktglobalswitches) then
StaticStr:='-static';
if (cs_link_strip in aktglobalswitches) then
StripStr:='-s';
if (cs_link_smart in aktglobalswitches) and
(tf_smartlink_sections in target_info.flags) then
GCSectionsStr:='--gc-sections';
If (cs_profile in aktmoduleswitches) or
((Info.DynamicLinker<>'') and (not SharedLibFiles.Empty)) then
begin
DynLinkStr:='-dynamic-linker='+Info.DynamicLinker;
if cshared Then
DynLinkStr:='--shared ' + DynLinkStr;
if rlinkpath<>'' Then
DynLinkStr:='--rpath-link '+rlinkpath + ' '+ DynLinkStr;
End;
{ Write used files and libraries }
WriteResponseFile;
{ Call linker }
SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
Replace(cmdstr,'$OPT',Info.ExtraOptions);
Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
Replace(cmdstr,'$STATIC',StaticStr);
Replace(cmdstr,'$STRIP',StripStr);
Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
Replace(cmdstr,'$DYNLINK',DynLinkStr);
success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
{ Remove ReponseFile }
if (success) and not(cs_link_extern in aktglobalswitches) then
RemoveFile(outputexedir+Info.ResName);
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
RegisterExternalLinker(system_arm_gba_info,TLinkerGba);
RegisterTarget(system_arm_gba_info);
end.
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