mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-26 22:03:41 +02:00
365 lines
9.7 KiB
ObjectPascal
365 lines
9.7 KiB
ObjectPascal
{
|
|
Copyright (c) 1998-2002 by Peter Vreman
|
|
|
|
This unit implements support import,export,link routines
|
|
for the (i386) Go32v2 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_go32v2;
|
|
|
|
{$i fpcdefs.inc}
|
|
|
|
interface
|
|
|
|
|
|
implementation
|
|
|
|
uses
|
|
link,
|
|
cutils,cclasses,
|
|
globtype,globals,systems,verbose,script,fmodule,i_go32v2,ogcoff;
|
|
|
|
type
|
|
tlinkergo32v2=class(texternallinker)
|
|
private
|
|
Function WriteResponseFile(isdll:boolean) : Boolean;
|
|
Function WriteScript(isdll:boolean) : Boolean;
|
|
public
|
|
constructor Create;override;
|
|
procedure SetDefaultInfo;override;
|
|
function MakeExecutable:boolean;override;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
TLinkerGo32v2
|
|
****************************************************************************}
|
|
|
|
Constructor TLinkerGo32v2.Create;
|
|
begin
|
|
Inherited Create;
|
|
{ allow duplicated libs (PM) }
|
|
SharedLibFiles.doubles:=true;
|
|
StaticLibFiles.doubles:=true;
|
|
end;
|
|
|
|
|
|
procedure TLinkerGo32v2.SetDefaultInfo;
|
|
begin
|
|
with Info do
|
|
begin
|
|
ExeCmd[1]:='ld $SCRIPT $OPT $STRIP -o $EXE $RES';
|
|
end;
|
|
end;
|
|
|
|
|
|
Function TLinkerGo32v2.WriteResponseFile(isdll:boolean) : Boolean;
|
|
Var
|
|
linkres : TLinkRes;
|
|
i : longint;
|
|
s : string;
|
|
linklibc : boolean;
|
|
begin
|
|
WriteResponseFile:=False;
|
|
|
|
{ Open link.res file }
|
|
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
|
|
|
|
{ Write staticlibraries }
|
|
if not StaticLibFiles.Empty then
|
|
begin
|
|
LinkRes.Add('-(');
|
|
While not StaticLibFiles.Empty do
|
|
begin
|
|
S:=StaticLibFiles.GetFirst;
|
|
LinkRes.AddFileName(GetShortName(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) }
|
|
linklibc:=false;
|
|
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
|
|
LinkRes.Add('-l'+s);
|
|
linklibc:=true;
|
|
end;
|
|
end;
|
|
{ be sure that libc&libgcc is the last lib }
|
|
if linklibc then
|
|
begin
|
|
LinkRes.Add('-lc');
|
|
LinkRes.Add('-lgcc');
|
|
end;
|
|
|
|
{ Write and Close response }
|
|
linkres.writetodisk;
|
|
LinkRes.Free;
|
|
|
|
WriteResponseFile:=True;
|
|
end;
|
|
|
|
|
|
Function TLinkerGo32v2.WriteScript(isdll:boolean) : Boolean;
|
|
Var
|
|
scriptres : TLinkRes;
|
|
HPath : TStringListItem;
|
|
s : string;
|
|
begin
|
|
WriteScript:=False;
|
|
|
|
{ Open link.res file }
|
|
ScriptRes:=TLinkRes.Create(outputexedir+Info.ScriptName);
|
|
ScriptRes.Add('OUTPUT_FORMAT("coff-go32-exe")');
|
|
ScriptRes.Add('ENTRY(start)');
|
|
|
|
ScriptRes.Add('SECTIONS');
|
|
ScriptRes.Add('{');
|
|
ScriptRes.Add(' .text 0x1000+SIZEOF_HEADERS : {');
|
|
ScriptRes.Add(' . = ALIGN(16);');
|
|
{ add objectfiles, start with prt0 always }
|
|
ScriptRes.Add(' '+GetShortName(FindObjectFile('prt0','',false))+'(.text)');
|
|
while not ObjectFiles.Empty do
|
|
begin
|
|
s:=ObjectFiles.GetFirst;
|
|
if s<>'' then
|
|
begin
|
|
ScriptRes.Add(' . = ALIGN(16);');
|
|
ScriptRes.Add(' '+GetShortName(s)+'(.text)');
|
|
end;
|
|
end;
|
|
ScriptRes.Add(' *(.text)');
|
|
ScriptRes.Add(' etext = . ; _etext = .;');
|
|
ScriptRes.Add(' . = ALIGN(0x200);');
|
|
ScriptRes.Add(' }');
|
|
ScriptRes.Add(' .data ALIGN(0x200) : {');
|
|
ScriptRes.Add(' djgpp_first_ctor = . ;');
|
|
ScriptRes.Add(' *(.ctor)');
|
|
ScriptRes.Add(' djgpp_last_ctor = . ;');
|
|
ScriptRes.Add(' djgpp_first_dtor = . ;');
|
|
ScriptRes.Add(' *(.dtor)');
|
|
ScriptRes.Add(' djgpp_last_dtor = . ;');
|
|
ScriptRes.Add(' *(.data)');
|
|
ScriptRes.Add(' *(.gcc_exc)');
|
|
ScriptRes.Add(' ___EH_FRAME_BEGIN__ = . ;');
|
|
ScriptRes.Add(' *(.eh_fram)');
|
|
ScriptRes.Add(' ___EH_FRAME_END__ = . ;');
|
|
ScriptRes.Add(' LONG(0)');
|
|
ScriptRes.Add(' edata = . ; _edata = .;');
|
|
ScriptRes.Add(' . = ALIGN(0x200);');
|
|
ScriptRes.Add(' }');
|
|
ScriptRes.Add(' .bss SIZEOF(.data) + ADDR(.data) :');
|
|
ScriptRes.Add(' {');
|
|
ScriptRes.Add(' _object.2 = . ;');
|
|
ScriptRes.Add(' . += 24 ;');
|
|
ScriptRes.Add(' *(.bss)');
|
|
ScriptRes.Add(' *(COMMON)');
|
|
ScriptRes.Add(' end = . ; _end = .;');
|
|
ScriptRes.Add(' . = ALIGN(0x200);');
|
|
ScriptRes.Add(' }');
|
|
ScriptRes.Add(' }');
|
|
|
|
{ Write path to search libraries }
|
|
HPath:=TStringListItem(current_module.locallibrarysearchpath.First);
|
|
while assigned(HPath) do
|
|
begin
|
|
ScriptRes.Add('SEARCH_DIR("'+GetShortName(HPath.Str)+'")');
|
|
HPath:=TStringListItem(HPath.Next);
|
|
end;
|
|
HPath:=TStringListItem(LibrarySearchPath.First);
|
|
while assigned(HPath) do
|
|
begin
|
|
ScriptRes.Add('SEARCH_DIR("'+GetShortName(HPath.Str)+'")');
|
|
HPath:=TStringListItem(HPath.Next);
|
|
end;
|
|
|
|
{ Write and Close response }
|
|
ScriptRes.WriteToDisk;
|
|
ScriptRes.Free;
|
|
|
|
WriteScript:=True;
|
|
end;
|
|
|
|
|
|
|
|
function TLinkerGo32v2.MakeExecutable:boolean;
|
|
var
|
|
binstr : String;
|
|
cmdstr : TCmdStr;
|
|
success : boolean;
|
|
StripStr : string[40];
|
|
begin
|
|
if not(cs_link_extern in aktglobalswitches) then
|
|
Message1(exec_i_linking,current_module.exefilename^);
|
|
|
|
{ Create some replacements }
|
|
StripStr:='';
|
|
if (cs_link_strip in aktglobalswitches) then
|
|
StripStr:='-s';
|
|
|
|
{ Write used files and libraries and our own ld script }
|
|
WriteScript(false);
|
|
WriteResponsefile(false);
|
|
|
|
{ Call linker }
|
|
SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
|
|
Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
|
|
Replace(cmdstr,'$OPT',Info.ExtraOptions);
|
|
if source_info.system=system_i386_go32v2 then
|
|
Replace(cmdstr,'$RES','@'+maybequoted(outputexedir+Info.ResName))
|
|
else
|
|
Replace(cmdstr,'$RES',maybequoted(outputexedir+Info.ResName));
|
|
Replace(cmdstr,'$STRIP',StripStr);
|
|
Replace(cmdstr,'$SCRIPT','--script='+maybequoted(outputexedir+Info.ScriptName));
|
|
success:=DoExec(FindUtil(utilsprefix+BinStr),cmdstr,true,false);
|
|
|
|
{ Remove ReponseFile }
|
|
if (success) and not(cs_link_extern in aktglobalswitches) then
|
|
begin
|
|
RemoveFile(outputexedir+Info.ResName);
|
|
RemoveFile(outputexedir+Info.ScriptName);
|
|
end;
|
|
|
|
MakeExecutable:=success; { otherwise a recursive call to link method }
|
|
end;
|
|
|
|
|
|
{$ifdef notnecessary}
|
|
procedure tlinkergo32v2.postprocessexecutable(const n : string);
|
|
type
|
|
tcoffheader=packed record
|
|
mach : word;
|
|
nsects : word;
|
|
time : longint;
|
|
sympos : longint;
|
|
syms : longint;
|
|
opthdr : word;
|
|
flag : word;
|
|
end;
|
|
tcoffsechdr=packed record
|
|
name : array[0..7] of char;
|
|
vsize : longint;
|
|
rvaofs : longint;
|
|
datalen : longint;
|
|
datapos : longint;
|
|
relocpos : longint;
|
|
lineno1 : longint;
|
|
nrelocs : word;
|
|
lineno2 : word;
|
|
flags : longint;
|
|
end;
|
|
psecfill=^TSecfill;
|
|
TSecfill=record
|
|
fillpos,
|
|
fillsize : longint;
|
|
next : psecfill;
|
|
end;
|
|
var
|
|
f : file;
|
|
coffheader : tcoffheader;
|
|
firstsecpos,
|
|
maxfillsize,
|
|
l : longint;
|
|
coffsec : tcoffsechdr;
|
|
secroot,hsecroot : psecfill;
|
|
zerobuf : pointer;
|
|
begin
|
|
{ when -s is used quit, because there is no .exe }
|
|
if cs_link_extern in aktglobalswitches then
|
|
exit;
|
|
{ open file }
|
|
assign(f,n);
|
|
{$I-}
|
|
reset(f,1);
|
|
if ioresult<>0 then
|
|
Message1(execinfo_f_cant_open_executable,n);
|
|
{ read headers }
|
|
seek(f,2048);
|
|
blockread(f,coffheader,sizeof(tcoffheader));
|
|
{ read section info }
|
|
maxfillsize:=0;
|
|
firstsecpos:=0;
|
|
secroot:=nil;
|
|
for l:=1to coffheader.nSects do
|
|
begin
|
|
blockread(f,coffsec,sizeof(tcoffsechdr));
|
|
if coffsec.datapos>0 then
|
|
begin
|
|
if secroot=nil then
|
|
firstsecpos:=coffsec.datapos;
|
|
new(hsecroot);
|
|
hsecroot^.fillpos:=coffsec.datapos+coffsec.vsize;
|
|
hsecroot^.fillsize:=coffsec.datalen-coffsec.vsize;
|
|
hsecroot^.next:=secroot;
|
|
secroot:=hsecroot;
|
|
if secroot^.fillsize>maxfillsize then
|
|
maxfillsize:=secroot^.fillsize;
|
|
end;
|
|
end;
|
|
if firstsecpos>0 then
|
|
begin
|
|
l:=firstsecpos-filepos(f);
|
|
if l>maxfillsize then
|
|
maxfillsize:=l;
|
|
end
|
|
else
|
|
l:=0;
|
|
{ get zero buffer }
|
|
getmem(zerobuf,maxfillsize);
|
|
fillchar(zerobuf^,maxfillsize,0);
|
|
{ zero from sectioninfo until first section }
|
|
blockwrite(f,zerobuf^,l);
|
|
{ zero section alignments }
|
|
while assigned(secroot) do
|
|
begin
|
|
seek(f,secroot^.fillpos);
|
|
blockwrite(f,zerobuf^,secroot^.fillsize);
|
|
hsecroot:=secroot;
|
|
secroot:=secroot^.next;
|
|
dispose(hsecroot);
|
|
end;
|
|
freemem(zerobuf,maxfillsize);
|
|
close(f);
|
|
{$I+}
|
|
i:=ioresult;
|
|
postprocessexecutable:=true;
|
|
end;
|
|
{$endif}
|
|
|
|
|
|
{*****************************************************************************
|
|
Initialize
|
|
*****************************************************************************}
|
|
|
|
initialization
|
|
RegisterExternalLinker(system_i386_go32v2_info,TLinkerGo32v2);
|
|
RegisterInternalLinker(system_i386_go32v2_info,TCoffLinker);
|
|
RegisterTarget(system_i386_go32v2_info);
|
|
end.
|