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{
Copyright (c) 2008 by the Free Pascal Compiler team
This unit implements common support for import,export,link routines
for unix 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 expunix;
{$i fpcdefs.inc}
interface
uses
cclasses,
systems,
export,
symdef,symsym,
aasmbase;
type
texportlibunix=class(texportlib)
private
fexportedsymnames: TCmdStrList;
public
constructor Create; override;
destructor destroy; override;
procedure preparelib(const s : string);override;
procedure exportprocedure(hp : texported_item);override;
procedure exportvar(hp : texported_item);override;
procedure generatelib;override;
property exportedsymnames: TCmdStrList read fexportedsymnames;
end;
implementation
{****************************************************************************
TExportLibUnix
****************************************************************************}
uses
symconst,
globals,
aasmdata,aasmtai,
fmodule,
{$ifdef cpuhighleveltarget}
symcreat,
{$endif}
cgbase,
hlcgobj,hlcgcpu,
verbose;
constructor texportlibunix.create;
begin
inherited create;
fexportedsymnames:=tcmdstrlist.create_no_double;
end;
destructor texportlibunix.destroy;
begin
fexportedsymnames.free;
inherited destroy;
end;
procedure texportlibunix.preparelib(const s:string);
begin
end;
procedure texportlibunix.exportprocedure(hp : texported_item);
var
hp2 : texported_item;
{$ifdef cpuhighleveltarget}
pd,
wrapperpd: tprocdef;
i: longint;
anyhasalias: boolean;
{$endif cpuhighleveltarget}
begin
{ first test the index value }
if eo_index in hp.options then
begin
Message1(parser_e_no_export_with_index_for_target,target_info.shortname);
exit;
end;
{ now place in correct order }
hp2:=texported_item(current_module._exports.first);
while assigned(hp2) and
(hp.name^>hp2.name^) do
hp2:=texported_item(hp2.next);
{ insert hp there !! }
if assigned(hp2) and (hp2.name^=hp.name^) then
begin
{ this is not allowed !! }
duplicatesymbol(hp.name^);
exit;
end;
if hp2=texported_item(current_module._exports.first) then
current_module._exports.concat(hp)
else if assigned(hp2) then
begin
hp.next:=hp2;
hp.previous:=hp2.previous;
if assigned(hp2.previous) then
hp2.previous.next:=hp;
hp2.previous:=hp;
end
else
current_module._exports.concat(hp);
{$ifdef cpuhighleveltarget}
{ in case of a high level target create a stub procedure at the node/def
level instead of via hlcg.g_external_wrapper() later on, because it's
hard to manually create a fake procedure there (and it requires a def
anyway) }
{ in case of eo_name there is no sym, and this routine is also called from
exportvar() so the sym doesn't have to be a procsym }
if assigned(hp.sym) and
(hp.sym.typ=procsym) then
begin
anyhasalias:=false;
{ if the procedure has the exported name as one of its aliases, we don't
need a separate stub }
pd:=nil;
for i:=0 to tprocsym(hp.sym).procdeflist.count-1 do
begin
pd:=tprocdef(tprocsym(hp.sym).procdeflist[i]);
anyhasalias:=pd.has_alias_name(hp.name^);
if anyhasalias then
break;
end;
if not anyhasalias then
begin
{ avoid name clashes for the identifier }
wrapperpd:=create_procdef_alias(pd,'$fpc_exported$'+hp.name^,hp.name^,
current_module.localsymtable,nil,
tsk_callthrough,pd);
end;
end;
{$endif cpuhighleveltarget}
end;
procedure texportlibunix.exportvar(hp : texported_item);
begin
hp.is_var:=true;
exportprocedure(hp);
end;
procedure texportlibunix.generatelib; // straight t_linux copy for now.
var
hp2 : texported_item;
pd : tprocdef;
anyhasalias : boolean;
i : longint;
begin
pd:=nil;
create_hlcodegen;
new_section(current_asmdata.asmlists[al_procedures],sec_code,'',0);
hp2:=texported_item(current_module._exports.first);
while assigned(hp2) do
begin
if (not hp2.is_var) and
assigned(hp2.sym) and
(hp2.sym.typ=procsym) then
begin
{$ifndef cpuhighleveltarget}
{ the manglednames can already be the same when the procedure
is declared with cdecl }
{ note: for "exports" sections we only allow non overloaded procsyms,
so checking all symbols only matters for packages }
anyhasalias:=false;
for i:=0 to tprocsym(hp2.sym).procdeflist.count-1 do
begin
pd:=tprocdef(tprocsym(hp2.sym).procdeflist[i]);
anyhasalias:=pd.has_alias_name(hp2.name^);
if anyhasalias then
break;
end;
if not anyhasalias then
hlcg.g_external_wrapper(current_asmdata.asmlists[al_procedures],pd,hp2.name^,pd.mangledname,true);
{$endif cpuhighleveltarget}
exportedsymnames.insert(hp2.name^);
end
else
begin
if assigned(hp2.sym) and
(hp2.name^<>hp2.sym.mangledname) then
Message2(parser_e_cant_export_var_different_name,hp2.sym.realname,hp2.sym.mangledname)
else
exportedsymnames.insert(hp2.name^);
end;
hp2:=texported_item(hp2.next);
end;
destroy_hlcodegen;
end;
end.
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