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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
cutils,cclasses,
systems,
export,
symtype,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,
globtype,globals,
aasmdata,aasmtai,aasmcpu,
fmodule,
cgbase,cgutils,cpubase,cgobj,
cgcpu,hlcgobj,hlcgcpu,
ncgutil,
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;
begin
{ first test the index value }
if (hp.options and eo_index)<>0 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 !! }
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 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;
{$ifdef x86}
sym : tasmsymbol;
r : treference;
{$endif x86}
begin
create_hlcodegen;
new_section(current_asmdata.asmlists[al_procedures],sec_code,'',0);
hp2:=texported_item(current_module._exports.first);
while assigned(hp2) do
begin
if (not hp2.is_var) and
(hp2.sym.typ=procsym) then
begin
{ the manglednames can already be the same when the procedure
is declared with cdecl }
pd:=tprocdef(tprocsym(hp2.sym).ProcdefList[0]);
if not has_alias_name(pd,hp2.name^) then
begin
{ place jump in al_procedures }
current_asmdata.asmlists[al_procedures].concat(tai_align.create(target_info.alignment.procalign));
current_asmdata.asmlists[al_procedures].concat(Tai_symbol.Createname_global(hp2.name^,AT_FUNCTION,0));
if (cs_create_pic in current_settings.moduleswitches) and
{ other targets need to be checked how it works }
(target_info.system in [system_i386_freebsd,system_x86_64_freebsd,system_x86_64_linux,system_i386_linux,system_x86_64_solaris,system_i386_solaris,system_i386_android,system_x86_64_dragonfly]) then
begin
{$ifdef x86}
sym:=current_asmdata.RefAsmSymbol(pd.mangledname);
reference_reset_symbol(r,sym,0,sizeof(pint));
if cs_create_pic in current_settings.moduleswitches 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.g_external_wrapper(current_asmdata.asmlists[al_procedures],pd,pd.mangledname);
current_asmdata.asmlists[al_procedures].concat(Tai_symbol_end.Createname(hp2.name^));
end;
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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