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fpc/compiler/systems/t_bsd.pas
marco 2a5332e3bd * Link ordering working FreeBSD implementation 
git-svn-id: trunk@3894 -
2006-06-19 14:17:45 +00:00

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{
Copyright (c) 1998-2002 by Peter Vreman (original Linux)
(c) 2000 by Marco van de Voort (FreeBSD mods)
This unit implements support import,export,link routines
for the (i386)FreeBSD 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_bsd;
{$i fpcdefs.inc}
interface
implementation
uses
cutils,cclasses,
{$ifdef USE_SYSUTILS}
sysutils,
{$else USE_SYSUTILS}
dos,
{$endif USE_SYSUTILS}
verbose,systems,globtype,globals,
symconst,script,
fmodule,aasmbase,aasmtai,aasmdata,aasmcpu,cpubase,symsym,symdef,
import,export,link,i_bsd,
cgutils,cgbase,cgobj,cpuinfo;
type
tdarwinimported_item = class(timported_item)
procdef : tprocdef;
end;
timportlibdarwin=class(timportlib)
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;
timportlibbsd=class(timportlib)
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;
texportlibbsd=class(texportlib)
procedure preparelib(const s : string);override;
procedure exportprocedure(hp : texported_item);override;
procedure exportvar(hp : texported_item);override;
procedure generatelib;override;
end;
tlinkerbsd=class(texternallinker)
private
LdSupportsNoResponseFile : boolean;
LibrarySuffix : Char;
Function WriteResponseFile(isdll:boolean) : Boolean;
public
constructor Create;override;
procedure SetDefaultInfo;override;
function MakeExecutable:boolean;override;
function MakeSharedLibrary:boolean;override;
procedure LoadPredefinedLibraryOrder; override;
end;
{*****************************************************************************
TIMPORTLIBDARWIN
*****************************************************************************}
procedure timportlibdarwin.preparelib(const s : string);
begin
if current_asmdata.asmlists[al_imports]=nil then
current_asmdata.asmlists[al_imports]:=TAsmList.create;
end;
procedure timportlibdarwin.importprocedure(aprocdef:tprocdef;const module : string;index : longint;const name : string);
begin
{ insert sharedlibrary }
{ current_module.linkothersharedlibs.add(SplitName(module),link_always); }
end;
procedure timportlibdarwin.importvariable(vs:tglobalvarsym;const name,module:string);
begin
{ insert sharedlibrary }
{ current_module.linkothersharedlibs.add(SplitName(module),link_always); }
{ the rest is handled in the nppcld.pas tppcloadnode }
vs.set_mangledname(name);
end;
procedure timportlibdarwin.generatelib;
begin
end;
{*****************************************************************************
TIMPORTLIBBSD
*****************************************************************************}
procedure timportlibbsd.preparelib(const s : string);
begin
end;
procedure timportlibbsd.importprocedure(aprocdef:tprocdef;const module:string;index:longint;const name:string);
begin
{ insert sharedlibrary }
current_module.linkothersharedlibs.add(SplitName(module),link_always);
end;
procedure timportlibbsd.importvariable(vs:tglobalvarsym;const name,module:string);
begin
{ insert sharedlibrary }
current_module.linkothersharedlibs.add(SplitName(module),link_always);
{ reset the mangledname and turn off the dll_var option }
vs.set_mangledname(name);
exclude(vs.varoptions,vo_is_dll_var);
end;
procedure timportlibbsd.generatelib;
begin
end;
{*****************************************************************************
TEXPORTLIBBSD
*****************************************************************************}
procedure texportlibbsd.preparelib(const s:string);
begin
end;
procedure texportlibbsd.exportprocedure(hp : texported_item);
var
hp2 : texported_item;
begin
{ first test the index value }
if (hp.options and eo_index)<>0 then
begin
Message1(parser_e_no_export_with_index_for_target,'*bsd/darwin');
exit;
end;
{ now place in correct order }
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 assigned(hp2) and (hp2.name^=hp.name^) then
begin
{ this is not allowed !! }
Message1(parser_e_export_name_double,hp.name^);
exit;
end;
if hp2=texported_item(current_module._exports.first) then
current_module._exports.concat(hp)
else if assigned(hp2) then
begin
hp.next:=hp2;
hp.previous:=hp2.previous;
if assigned(hp2.previous) then
hp2.previous.next:=hp;
hp2.previous:=hp;
end
else
current_module._exports.concat(hp);
end;
procedure texportlibbsd.exportvar(hp : texported_item);
begin
hp.is_var:=true;
exportprocedure(hp);
end;
procedure texportlibbsd.generatelib; // straight t_linux copy for now.
var
hp2 : texported_item;
sym : tasmsymbol;
r : treference;
begin
new_section(current_asmdata.asmlists[al_procedures],sec_code,'',0);
hp2:=texported_item(current_module._exports.first);
while assigned(hp2) do
begin
if (not hp2.is_var) and
(hp2.sym.typ=procsym) then
begin
{ the manglednames can already be the same when the procedure
is declared with cdecl }
if tprocsym(hp2.sym).first_procdef.mangledname<>hp2.name^ then
begin
{ place jump in al_procedures }
current_asmdata.asmlists[al_procedures].concat(tai_align.create(target_info.alignment.procalign));
current_asmdata.asmlists[al_procedures].concat(Tai_symbol.Createname_global(hp2.name^,AT_FUNCTION,0));
if (cs_create_pic in aktmoduleswitches) and
{ other targets need to be checked how it works }
(target_info.system in [system_i386_freebsd]) then
begin
{$ifdef x86}
sym:=current_asmdata.RefAsmSymbol(tprocsym(hp2.sym).first_procdef.mangledname);
reference_reset_symbol(r,sym,0);
if cs_create_pic in aktmoduleswitches then
r.refaddr:=addr_pic
else
r.refaddr:=addr_full;
current_asmdata.asmlists[al_procedures].concat(taicpu.op_ref(A_JMP,S_NO,r));
{$endif x86}
end
else
cg.a_jmp_name(current_asmdata.asmlists[al_procedures],tprocsym(hp2.sym).first_procdef.mangledname);
current_asmdata.asmlists[al_procedures].concat(Tai_symbol_end.Createname(hp2.name^));
end;
end
else
Message1(parser_e_no_export_of_variables_for_target,'*bsd/darwin');
hp2:=texported_item(hp2.next);
end;
end;
{*****************************************************************************
TLINKERBSD
*****************************************************************************}
Constructor TLinkerBSD.Create;
begin
Inherited Create;
if not Dontlinkstdlibpath Then
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
LibrarySearchPath.AddPath('/lib;/usr/lib;/usr/X11R6/lib',true)
else
{ Mac OS X doesn't have a /lib }
LibrarySearchPath.AddPath('/usr/lib',true)
end;
procedure TLinkerBSD.SetDefaultInfo;
{
This will also detect which libc version will be used
}
begin
LibrarySuffix:=' ';
LdSupportsNoResponseFile := (target_info.system in [system_m68k_netbsd,system_powerpc_darwin,system_i386_darwin]);
with Info do
begin
if LdSupportsNoResponseFile then
begin
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
begin
ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE `cat $RES`';
DllCmd[1]:='ld $OPT -shared -L. -o $EXE `cat $RES`'
end
else
begin
ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -multiply_defined suppress -L. -o $EXE `cat $RES`';
DllCmd[1]:='libtool $OPT -dynamic -multiply_defined suppress -L. -o $EXE `cat $RES`'
end
end
else
begin
ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE $RES';
DllCmd[1]:='ld $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES';
end;
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
DllCmd[2]:='strip --strip-unneeded $EXE'
else
DllCmd[2]:='strip -x $EXE';
DynamicLinker:='';
end;
end;
procedure TLinkerBSD.LoadPredefinedLibraryOrder;
// put your linkorder/linkalias overrides here.
// Note: assumes only called when reordering/aliasing is used.
Begin
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
begin
if (target_info.system =system_i386_freebsd) and
not (cs_link_no_default_lib_order in aktglobalswitches) Then
Begin
LinkLibraryOrder.add('gcc','',15);
LinkLibraryOrder.add('c','',50); // c and c_p mutual. excl?
LinkLibraryOrder.add('c_p','',55);
LinkLibraryOrder.add('pthread','',75); // pthread and c_r should be mutually exclusive
LinkLibraryOrder.add('c_r','',76);
LinkLibraryOrder.add('kvm','',80); // must be before ncurses
if (cs_link_pthread in aktglobalswitches) Then // convert libpthread to libc_r.
LinkLibraryAliases.add('pthread','c_r');
end;
end;
End;
Function TLinkerBSD.WriteResponseFile(isdll:boolean) : Boolean;
Var
linkres : TLinkRes;
i : longint;
cprtobj,
gprtobj,
prtobj : string[80];
HPath : TStringListItem;
s,s1,s2 : string;
linkpthread,
linkdynamic,
linklibc : boolean;
Fl1,Fl2 : Boolean;
IsDarwin : Boolean;
ReOrder : Boolean;
begin
WriteResponseFile:=False;
ReOrder:=False;
IsDarwin:=target_info.system in [system_powerpc_darwin,system_i386_darwin];
{ set special options for some targets }
if not IsDarwin Then
begin
prtobj:='prt0';
cprtobj:='cprt0';
gprtobj:='gprt0';
linkdynamic:=not(SharedLibFiles.empty);
linklibc:=(SharedLibFiles.Find('c')<>nil);
// this one is a bit complex.
// Only reorder for now if -XL or -XO params are given
// or when -Xf.
reorder:= linklibc and
(
ReorderEntries
or
(cs_link_pthread in aktglobalswitches));
if cs_profile in aktmoduleswitches then
begin
prtobj:=gprtobj;
AddSharedLibrary('c');
LibrarySuffix:='p';
linklibc:=true;
end
else
begin
if linklibc then
prtobj:=cprtobj;
end;
if reorder Then
ExpandAndApplyOrder(SharedLibFiles);
// after this point addition of shared libs not allowed.
end
else
begin
{ for darwin: always link dynamically against libc }
linklibc := true;
if not(isdll) then
if not(cs_profile in aktmoduleswitches) then
begin
if librarysearchpath.FindFile('crt1.o',s) then
prtobj:=s
else
prtobj:='/usr/lib/crt1.o';
end
else
prtobj:='/usr/lib/gcrt1.o'
else
prtobj:='';
end;
{ Open link.res file }
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
if (not isdll) then
begin
case target_info.system of
system_powerpc_darwin:
LinkRes.Add('-arch ppc');
system_i386_darwin:
LinkRes.Add('-arch i386');
end;
end;
{ Write path to search libraries }
HPath:=TStringListItem(current_module.locallibrarysearchpath.First);
while assigned(HPath) do
begin
if LdSupportsNoResponseFile then
LinkRes.Add(maybequoted('-L'+HPath.Str))
else
LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TStringListItem(HPath.Next);
end;
HPath:=TStringListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
if LdSupportsNoResponseFile then
LinkRes.Add(maybequoted('-L'+HPath.Str))
else
LinkRes.Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TStringListItem(HPath.Next);
end;
if not LdSupportsNoResponseFile then
LinkRes.Add('INPUT(');
{ add objectfiles, start with prt0 always }
if prtobj<>'' then
LinkRes.AddFileName(FindObjectFile(prtobj,'',false));
{ try to add crti and crtbegin if linking to C }
if linklibc and
not IsDarwin 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;
if not LdSupportsNoResponseFile then
LinkRes.Add(')');
{ Write staticlibraries }
if not StaticLibFiles.Empty then
begin
if not LdSupportsNoResponseFile then
LinkRes.Add('GROUP(');
While not StaticLibFiles.Empty do
begin
S:=StaticLibFiles.GetFirst;
LinkRes.AddFileName(maybequoted(s))
end;
if not LdSupportsNoResponseFile then
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
if not LdSupportsNoResponseFile then
LinkRes.Add('INPUT(');
While not SharedLibFiles.Empty do
begin
S:=SharedLibFiles.GetFirst;
if (s<>'c') or reorder 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;
linkdynamic:=false; { libc will include the ld-* for us }
end;
end;
{ be sure that libc is the last lib }
if linklibc and not reorder then
Begin
If LibrarySuffix=' ' Then
LinkRes.Add('-lc')
else
LinkRes.Add('-lc_'+LibrarySuffix);
If LibrarySuffix='r' Then
LinkRes.Add('-lc');
end;
{ when we have -static for the linker the we also need libgcc }
if (cs_link_staticflag in aktglobalswitches) then
LinkRes.Add('-lgcc');
if linkdynamic and (Info.DynamicLinker<>'') then
LinkRes.AddFileName(Info.DynamicLinker);
if not LdSupportsNoResponseFile then
LinkRes.Add(')');
end;
{ objects which must be at the end }
if linklibc and
not IsDarwin Then
begin
Fl1:=librarysearchpath.FindFile('crtend.o',s1);
Fl2:=librarysearchpath.FindFile('crtn.o',s2);
if Fl1 or Fl2 then
begin
LinkRes.Add('INPUT(');
If Fl1 Then
LinkRes.AddFileName(s1);
If Fl2 Then
LinkRes.AddFileName(s2);
LinkRes.Add(')');
end;
end;
{ ignore the fact that our relocations are in non-writable sections, }
{ will be fixed once we have pic support }
if isdll and IsDarwin Then
LinkRes.Add('-read_only_relocs suppress');
{ Write and Close response }
linkres.writetodisk;
linkres.Free;
WriteResponseFile:=True;
end;
function TLinkerBSD.MakeExecutable:boolean;
var
binstr : String;
cmdstr : TCmdStr;
success : boolean;
DynLinkStr : string[60];
GCSectionsStr,
StaticStr,
StripStr : string[40];
begin
if not(cs_link_nolink in aktglobalswitches) then
Message1(exec_i_linking,current_module.exefilename^);
{ Create some replacements }
StaticStr:='';
StripStr:='';
DynLinkStr:='';
GCSectionsStr:='';
if (cs_link_staticflag in aktglobalswitches) then
begin
if (target_info.system=system_m68k_netbsd) and
((cs_link_on_target in aktglobalswitches) or
(target_info.system=source_info.system)) then
StaticStr:='-Bstatic'
else
StaticStr:='-static';
end;
if (cs_link_strip in aktglobalswitches) then
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
StripStr:='-s'
else
StripStr:='-x';
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
DynLinkStr:='-dynamic-linker='+Info.DynamicLinker;
if CShared Then
begin
if not(target_info.system in [system_powerpc_darwin,system_i386_darwin]) then
DynLinKStr:=DynLinkStr+' --shared'
else
DynLinKStr:=DynLinkStr+' -dynamic'; // one dash!
end;
{ Write used files and libraries }
WriteResponseFile(false);
{ 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,LdSupportsNoResponseFile);
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in aktglobalswitches) then
RemoveFile(outputexedir+Info.ResName);
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
Function TLinkerBSD.MakeSharedLibrary:boolean;
var
InitStr,
FiniStr,
SoNameStr : string[80];
binstr : String;
cmdstr : TCmdStr;
success : boolean;
begin
MakeSharedLibrary:=false;
if not(cs_link_nolink in aktglobalswitches) then
Message1(exec_i_linking,current_module.sharedlibfilename^);
{ Write used files and libraries }
WriteResponseFile(true);
InitStr:='-init FPC_LIB_START';
FiniStr:='-fini FPC_LIB_EXIT';
SoNameStr:='-soname '+SplitFileName(current_module.sharedlibfilename^);
{ Call linker }
SplitBinCmd(Info.DllCmd[1],binstr,cmdstr);
{$ifndef darwin}
Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
{$else darwin}
{$ifdef USE_SYSUTILS}
Replace(cmdstr,'$EXE',maybequoted(ExpandFileName(current_module.sharedlibfilename^)));
{$else USE_SYSUTILS}
Replace(cmdstr,'$EXE',maybequoted(FExpand(current_module.sharedlibfilename^)));
{$endif USE_SYSUTILS}
{$endif darwin}
Replace(cmdstr,'$OPT',Info.ExtraOptions);
Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
Replace(cmdstr,'$INIT',InitStr);
Replace(cmdstr,'$FINI',FiniStr);
Replace(cmdstr,'$SONAME',SoNameStr);
success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,LdSupportsNoResponseFile);
{ Strip the library ? }
if success and (cs_link_strip in aktglobalswitches) then
begin
SplitBinCmd(Info.DllCmd[2],binstr,cmdstr);
Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
end;
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in aktglobalswitches) then
RemoveFile(outputexedir+Info.ResName);
MakeSharedLibrary:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
{$ifdef x86_64}
RegisterExternalLinker(system_x86_64_FreeBSD_info,TLinkerBSD);
RegisterImport(system_x86_64_freebsd,timportlibbsd);
RegisterExport(system_x86_64_freebsd,texportlibbsd);
RegisterTarget(system_x86_64_freebsd_info);
{$endif}
{$ifdef i386}
RegisterExternalLinker(system_i386_FreeBSD_info,TLinkerBSD);
RegisterExternalLinker(system_i386_NetBSD_info,TLinkerBSD);
RegisterExternalLinker(system_i386_OpenBSD_info,TLinkerBSD);
RegisterImport(system_i386_freebsd,timportlibbsd);
RegisterExport(system_i386_freebsd,texportlibbsd);
RegisterTarget(system_i386_freebsd_info);
RegisterImport(system_i386_netbsd,timportlibbsd);
RegisterExport(system_i386_netbsd,texportlibbsd);
RegisterTarget(system_i386_netbsd_info);
RegisterImport(system_i386_openbsd,timportlibbsd);
RegisterExport(system_i386_openbsd,texportlibbsd);
RegisterTarget(system_i386_openbsd_info);
RegisterExternalLinker(system_i386_darwin_info,TLinkerBSD);
RegisterImport(system_i386_darwin,timportlibdarwin);
RegisterExport(system_i386_darwin,texportlibbsd);
RegisterTarget(system_i386_darwin_info);
{$endif i386}
{$ifdef m68k}
// RegisterExternalLinker(system_m68k_FreeBSD_info,TLinkerBSD);
RegisterExternalLinker(system_m68k_NetBSD_info,TLinkerBSD);
RegisterImport(system_m68k_netbsd,timportlibbsd);
RegisterExport(system_m68k_netbsd,texportlibbsd);
RegisterTarget(system_m68k_netbsd_info);
{$endif m68k}
{$ifdef powerpc}
// RegisterExternalLinker(system_m68k_FreeBSD_info,TLinkerBSD);
RegisterExternalLinker(system_powerpc_darwin_info,TLinkerBSD);
RegisterImport(system_powerpc_darwin,timportlibdarwin);
RegisterExport(system_powerpc_darwin,texportlibbsd);
RegisterTarget(system_powerpc_darwin_info);
RegisterExternalLinker(system_powerpc_netbsd_info,TLinkerBSD);
RegisterImport(system_powerpc_netbsd,timportlibbsd);
RegisterExport(system_powerpc_netbsd,texportlibbsd);
RegisterTarget(system_powerpc_netbsd_info);
{$endif powerpc}
end.
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