{
$Id: t_linux.pas,v 1.14 2004/01/03 13:51:05 jonas Exp $
Copyright (c) 1998-2002 by Peter Vreman
This unit implements support import,export,link routines
for the (i386) Linux 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_linux;
{$i fpcdefs.inc}
interface
uses
symsym,symdef,
import,export,link;
type
timportliblinux=class(timportlib)
procedure preparelib(const s:string);override;
procedure importprocedure(aprocdef:tprocdef;const module:string;index:longint;const name:string);override;
procedure importvariable(vs:tvarsym;const name,module:string);override;
procedure generatelib;override;
end;
texportliblinux=class(texportlib)
procedure preparelib(const s : string);override;
procedure exportprocedure(hp : texported_item);override;
procedure exportvar(hp : texported_item);override;
procedure generatelib;override;
end;
tlinkerlinux=class(texternallinker)
private
Glibc2,
Glibc21 : boolean;
Function WriteResponseFile(isdll:boolean) : Boolean;
public
constructor Create;override;
procedure SetDefaultInfo;override;
function MakeExecutable:boolean;override;
function MakeSharedLibrary:boolean;override;
end;
implementation
uses
cutils,cclasses,
verbose,systems,globtype,globals,
symconst,script,
fmodule,dos
,aasmbase,aasmtai,aasmcpu,cpubase
,i_linux
;
{*****************************************************************************
TIMPORTLIBLINUX
*****************************************************************************}
procedure timportliblinux.preparelib(const s : string);
begin
end;
procedure timportliblinux.importprocedure(aprocdef:tprocdef;const module:string;index:longint;const name:string);
begin
{ insert sharedlibrary }
current_module.linkothersharedlibs.add(SplitName(module),link_allways);
{ do nothing with the procedure, only set the mangledname }
if name<>'' then
begin
aprocdef.setmangledname(name);
end
else
message(parser_e_empty_import_name);
end;
procedure timportliblinux.importvariable(vs:tvarsym;const name,module:string);
begin
{ insert sharedlibrary }
current_module.linkothersharedlibs.add(SplitName(module),link_allways);
{ reset the mangledname and turn off the dll_var option }
vs.set_mangledname(name);
exclude(vs.varoptions,vo_is_dll_var);
end;
procedure timportliblinux.generatelib;
begin
end;
{*****************************************************************************
TEXPORTLIBLINUX
*****************************************************************************}
procedure texportliblinux.preparelib(const s:string);
begin
end;
procedure texportliblinux.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,'linux');
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 texportliblinux.exportvar(hp : texported_item);
begin
hp.is_var:=true;
exportprocedure(hp);
end;
procedure texportliblinux.generatelib;
var
hp2 : texported_item;
begin
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
{$ifdef i386}
{ place jump in codesegment }
codesegment.concat(Tai_align.Create_op(4,$90));
codeSegment.concat(Tai_symbol.Createname_global(hp2.name^,0));
codeSegment.concat(Taicpu.Op_sym(A_JMP,S_NO,objectlibrary.newasmsymbol(tprocsym(hp2.sym).first_procdef.mangledname)));
codeSegment.concat(Tai_symbol_end.Createname(hp2.name^));
{$else i386}
{$ifdef m68k}
{ place jump in codesegment }
codesegment.concat(tai_align.create(4));
codesegment.concat(tai_symbol.createname_global(hp2.name^,0));
codesegment.concat(taicpu.op_sym(A_JMP,S_NO,objectlibrary.newasmsymbol(tprocsym(hp2.sym).first_procdef.mangledname)));
codesegment.concat(tai_symbol_end.createname(hp2.name^));
{$else m68k}
{$ifdef powerpc}
{ place jump in codesegment }
codesegment.concat(tai_align.create(4));
codesegment.concat(tai_symbol.createname_global(hp2.name^,0));
codesegment.concat(taicpu.op_sym(A_B,objectlibrary.newasmsymbol(tprocsym(hp2.sym).first_procdef.mangledname)));
codesegment.concat(tai_symbol_end.createname(hp2.name^));
{$endif powerpc}
{$else powerpc}
{$error Exportliblinux.generatelib not yet implemented for target processor}
{$endif m68k}
{$endif i386}
end;
end
else
Message1(parser_e_no_export_of_variables_for_target,'linux');
hp2:=texported_item(hp2.next);
end;
end;
{*****************************************************************************
TLINKERLINUX
*****************************************************************************}
Constructor TLinkerLinux.Create;
begin
Inherited Create;
if NOT Dontlinkstdlibpath Then
LibrarySearchPath.AddPath('/lib;/usr/lib;/usr/X11R6/lib',true);
end;
procedure TLinkerLinux.SetDefaultInfo;
{
This will also detect which libc version will be used
}
{$ifdef m68k}
var
St : SearchRec;
{$endif m68k}
begin
Glibc2:=false;
Glibc21:=false;
with Info do
begin
ExeCmd[1]:='ld $OPT $DYNLINK $STATIC $STRIP -L. -o $EXE $RES';
DllCmd[1]:='ld $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES';
DllCmd[2]:='strip --strip-unneeded $EXE';
{$ifdef m68k}
Glibc2:=true;
FindFirst('/lib/ld*',AnyFile,st);
while DosError=0 do
begin
if copy(st.name,1,5)='ld-2.' then
begin
DynamicLinker:='/lib/'+St.name;
Glibc21:=st.name[6]<>'0';
break;
end;
FindNext(St);
end;
FindClose(St);
{$else m68k}
{$ifdef i386}
{ first try glibc2 }
DynamicLinker:='/lib/ld-linux.so.2';
if FileExists(DynamicLinker) then
begin
Glibc2:=true;
{ Check for 2.0 files, else use the glibc 2.1 stub }
if FileExists('/lib/ld-2.0.*') then
Glibc21:=false
else
Glibc21:=true;
end
else
DynamicLinker:='/lib/ld-linux.so.1';
{$else i386}
Glibc2 := true;
DynamicLinker:='/lib/ld.so.1';
{$endif i386}
{$endif m68k}
end;
end;
Function TLinkerLinux.WriteResponseFile(isdll:boolean) : Boolean;
Var
linkres : TLinkRes;
i : longint;
cprtobj,
gprtobj,
prtobj : string[80];
HPath : TStringListItem;
s,s1,s2 : string;
found1,
found2,
linkdynamic,
linklibc : boolean;
begin
WriteResponseFile:=False;
{ set special options for some targets }
linkdynamic:=not(SharedLibFiles.empty);
linklibc:=(SharedLibFiles.Find('c')<>nil);
if isdll then
begin
prtobj:='dllprt0';
cprtobj:='dllprt0';
gprtobj:='dllprt0';
end
else
begin
prtobj:='prt0';
cprtobj:='cprt0';
gprtobj:='gprt0';
if glibc21 then
begin
cprtobj:='cprt21';
gprtobj:='gprt21';
end;
end;
if cs_profile in aktmoduleswitches then
begin
prtobj:=gprtobj;
if not glibc2 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('+HPath.Str+')');
HPath:=TStringListItem(HPath.Next);
end;
HPath:=TStringListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
LinkRes.Add('SEARCH_DIR('+HPath.Str+')');
HPath:=TStringListItem(HPath.Next);
end;
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 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(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(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;
linkdynamic:=false; { libc will include the ld-linux for us }
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');
if linkdynamic and (Info.DynamicLinker<>'') then
LinkRes.AddFileName(Info.DynamicLinker);
LinkRes.Add(')');
end;
{ objects which must be at the end }
if linklibc 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 TLinkerLinux.MakeExecutable:boolean;
var
binstr,
cmdstr : string;
success : boolean;
DynLinkStr : string[60];
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:='';
DynLinkStr:='';
if (cs_link_staticflag in aktglobalswitches) then
StaticStr:='-static';
if (cs_link_strip in aktglobalswitches) then
StripStr:='-s';
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(false);
{ Call linker }
SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
Replace(cmdstr,'$EXE',current_module.exefilename^);
Replace(cmdstr,'$OPT',Info.ExtraOptions);
Replace(cmdstr,'$RES',outputexedir+Info.ResName);
Replace(cmdstr,'$STATIC',StaticStr);
Replace(cmdstr,'$STRIP',StripStr);
Replace(cmdstr,'$DYNLINK',DynLinkStr);
success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
{ Remove ReponseFile }
if (success) and not(cs_link_extern in aktglobalswitches) then
RemoveFile(outputexedir+Info.ResName);
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
Function TLinkerLinux.MakeSharedLibrary:boolean;
var
InitStr,
FiniStr,
SoNameStr : string[80];
binstr,
cmdstr : string;
success : boolean;
begin
MakeSharedLibrary:=false;
if not(cs_link_extern in aktglobalswitches) then
Message1(exec_i_linking,current_module.sharedlibfilename^);
{ Write used files and libraries }
WriteResponseFile(true);
{ Create some replacements }
InitStr:='-init FPC_LIB_START';
FiniStr:='-fini FPC_LIB_EXIT';
SoNameStr:='-soname '+SplitFileName(current_module.sharedlibfilename^);
{ Call linker }
SplitBinCmd(Info.DllCmd[1],binstr,cmdstr);
Replace(cmdstr,'$EXE',current_module.sharedlibfilename^);
Replace(cmdstr,'$OPT',Info.ExtraOptions);
Replace(cmdstr,'$RES',outputexedir+Info.ResName);
Replace(cmdstr,'$INIT',InitStr);
Replace(cmdstr,'$FINI',FiniStr);
Replace(cmdstr,'$SONAME',SoNameStr);
success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
{ Strip the library ? }
if success and (cs_link_strip in aktglobalswitches) then
begin
SplitBinCmd(Info.DllCmd[2],binstr,cmdstr);
Replace(cmdstr,'$EXE',current_module.sharedlibfilename^);
success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
end;
{ Remove ReponseFile }
if (success) and not(cs_link_extern in aktglobalswitches) then
RemoveFile(outputexedir+Info.ResName);
MakeSharedLibrary:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
{$ifdef i386}
RegisterExternalLinker(system_i386_linux_info,TLinkerLinux);
RegisterImport(system_i386_linux,timportliblinux);
RegisterExport(system_i386_linux,texportliblinux);
RegisterTarget(system_i386_linux_info);
{$endif i386}
{$ifdef m68k}
RegisterExternalLinker(system_m68k_linux_info,TLinkerLinux);
RegisterImport(system_m68k_linux,timportliblinux);
RegisterExport(system_m68k_linux,texportliblinux);
RegisterTarget(system_m68k_linux_info);
{$endif m68k}
{$ifdef powerpc}
RegisterExternalLinker(system_powerpc_linux_info,TLinkerLinux);
RegisterImport(system_powerpc_linux,timportliblinux);
RegisterExport(system_powerpc_linux,texportliblinux);
RegisterTarget(system_powerpc_linux_info);
{$endif powerpc}
{$ifdef alpha}
RegisterExternalLinker(system_alpha_linux_info,TLinkerLinux);
RegisterImport(system_alpha_linux,timportliblinux);
RegisterExport(system_alpha_linux,texportliblinux);
RegisterTarget(system_alpha_linux_info);
{$endif alpha}
{$ifdef x86_64}
RegisterExternalLinker(system_x86_64_linux_info,TLinkerLinux);
RegisterImport(system_x86_64_linux,timportliblinux);
RegisterExport(system_x86_64_linux,texportliblinux);
RegisterTarget(system_x86_64_linux_info);
{$endif x86_64}
{$ifdef SPARC}
RegisterExternalLinker(system_sparc_linux_info,TLinkerLinux);
RegisterImport(system_SPARC_linux,timportliblinux);
RegisterExport(system_SPARC_linux,texportliblinux);
RegisterTarget(system_SPARC_linux_info);
{$endif SPARC}
{$ifdef ARM}
RegisterExternalLinker(system_arm_linux_info,TLinkerLinux);
RegisterImport(system_arm_linux,timportliblinux);
RegisterExport(system_arm_linux,texportliblinux);
RegisterTarget(system_arm_linux_info);
{$endif ARM}
end.
{
$Log: t_linux.pas,v $
Revision 1.14 2004/01/03 13:51:05 jonas
+ support exported procedures for linuxppc
* refuse to compile systems/t_linux.pas if processor-specific support
for exported procedures is absent
+ generate .type and .size info for all currently defined linux-variants
in aggas.pas
Revision 1.13 2004/01/01 15:34:50 jonas
* default linker name for non-i386 and non-m68k
Revision 1.12 2003/10/30 18:35:30 marco
* librarysuffix + profiling
Revision 1.11 2003/10/11 19:32:04 marco
* -Xd
Revision 1.10 2003/10/03 14:16:48 marco
* -XP<prefix> support
Revision 1.9 2003/07/21 11:52:57 florian
* very basic stuff for the arm
Revision 1.8 2003/04/27 07:29:52 peter
* aktprocdef cleanup, aktprocdef is now always nil when parsing
a new procdef declaration
* aktprocsym removed
* lexlevel removed, use symtable.symtablelevel instead
* implicit init/final code uses the normal genentry/genexit
* funcret state checking updated for new funcret handling
Revision 1.7 2003/04/26 09:16:08 peter
* .o files belonging to the unit are first searched in the same dir
as the .ppu
Revision 1.6 2002/12/14 13:02:45 carl
- remove extra ifdef i386 (avoir compilation errors)
Revision 1.5 2002/12/06 17:51:43 peter
* m68k library support
Revision 1.4 2002/11/17 16:32:04 carl
* memory optimization (3-4%) : cleanup of tai fields,
cleanup of tdef and tsym fields.
* make it work for m68k
Revision 1.3 2002/11/15 01:59:02 peter
* merged changes from 1.0.7 up to 04-11
- -V option for generating bug report tracing
- more tracing for option parsing
- errors for cdecl and high()
- win32 import stabs
- win32 records<=8 are returned in eax:edx (turned off by default)
- heaptrc update
- more info for temp management in .s file with EXTDEBUG
Revision 1.2 2002/09/09 17:34:17 peter
* tdicationary.replace added to replace and item in a dictionary. This
is only allowed for the same name
* varsyms are inserted in symtable before the types are parsed. This
fixes the long standing "var longint : longint" bug
- consume_idlist and idstringlist removed. The loops are inserted
at the callers place and uses the symtable for duplicate id checking
Revision 1.1 2002/09/06 15:03:51 carl
* moved files to systems directory
Revision 1.33 2002/09/03 16:26:28 daniel
* Make Tprocdef.defs protected
Revision 1.32 2002/08/12 15:08:44 carl
+ stab register indexes for powerpc (moved from gdb to cpubase)
+ tprocessor enumeration moved to cpuinfo
+ linker in target_info is now a class
* many many updates for m68k (will soon start to compile)
- removed some ifdef or correct them for correct cpu
Revision 1.31 2002/08/11 14:32:32 peter
* renamed current_library to objectlibrary
Revision 1.30 2002/08/11 13:24:19 peter
* saving of asmsymbols in ppu supported
* asmsymbollist global is removed and moved into a new class
tasmlibrarydata that will hold the info of a .a file which
corresponds with a single module. Added librarydata to tmodule
to keep the library info stored for the module. In the future the
objectfiles will also be stored to the tasmlibrarydata class
* all getlabel/newasmsymbol and friends are moved to the new class
Revision 1.29 2002/07/26 21:15:46 florian
* rewrote the system handling
Revision 1.28 2002/07/04 20:43:02 florian
* first x86-64 patches
Revision 1.27 2002/07/01 18:46:35 peter
* internal linker
* reorganized aasm layer
Revision 1.26 2002/05/18 13:34:26 peter
* readded missing revisions
Revision 1.25 2002/05/16 19:46:53 carl
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
+ try to fix temp allocation (still in ifdef)
+ generic constructor calls
+ start of tassembler / tmodulebase class cleanup
Revision 1.22 2002/05/06 19:46:36 carl
+ added more patches from Mazen for SPARC port
Revision 1.21 2002/04/22 18:19:22 carl
- remove use_bound_instruction field
Revision 1.20 2002/04/20 21:43:18 carl
* fix stack size for some targets
+ add offset to parameters from frame pointer info.
- remove some unused stuff
Revision 1.19 2002/04/19 15:46:05 peter
* mangledname rewrite, tprocdef.mangledname is now created dynamicly
in most cases and not written to the ppu
* add mangeledname_prefix() routine to generate the prefix of
manglednames depending on the current procedure, object and module
* removed static procprefix since the mangledname is now build only
on demand from tprocdef.mangledname
Revision 1.18 2002/04/15 19:44:23 peter
* fixed stackcheck that would be called recursively when a stack
error was found
* generic changeregsize(reg,size) for i386 register resizing
* removed some more routines from cga unit
* fixed returnvalue handling
* fixed default stacksize of linux and go32v2, 8kb was a bit small :-)
Revision 1.17 2002/04/15 19:16:57 carl
- remove size_of_pointer field
Revision 1.16 2002/01/29 21:27:34 peter
* default alignment changed to 4 bytes for locals and static const,var
Revision 1.15 2002/01/09 07:38:37 michael
+ Patch from Peter for library imports
}
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