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ebe8078263
fpc/compiler/systems/t_linux.pas
Jonas Maebe 1f61b5b30c * reverted the rtl patches from r14184, because they cause an endless 
loop when attempting to terminate a process via the RTL compiled into
    a Linux shared library  (mantis #17383)
  * call FPC_LIB_EXIT (the internal/generic RTL finalisation routine) instead
    of FPC_SHARED_LIB_EXIT (the Linux-specific "process exit" code for shared
    libraries) as "fini" routine (fixes #14958 again after reverting r14184)

git-svn-id: trunk@16418 -
2010-11-24 15:33:29 +00:00

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44 KiB
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{
Copyright (c) 1998-2008 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
aasmdata,
symsym,symdef,ppu,
import,export,expunix,link;
type
timportliblinux=class(timportlib)
procedure generatelib;override;
end;
texportliblinux=class(texportlibunix)
procedure setfininame(list: TAsmList; const s: string); override;
end;
tlinkerlinux=class(texternallinker)
private
libctype:(libc5,glibc2,glibc21,uclibc);
cprtobj,
gprtobj,
prtobj : string[80];
reorder : boolean;
linklibc: boolean;
Function WriteResponseFile(isdll:boolean) : Boolean;
public
constructor Create;override;
procedure SetDefaultInfo;override;
procedure InitSysInitUnitName;override;
function MakeExecutable:boolean;override;
function MakeSharedLibrary:boolean;override;
procedure LoadPredefinedLibraryOrder; override;
end;
implementation
uses
SysUtils,
cutils,cfileutl,cclasses,
verbose,systems,globtype,globals,
symconst,script,
fmodule,
aasmbase,aasmtai,aasmcpu,cpubase,
cgbase,cgobj,cgutils,ogbase,ncgutil,
comprsrc,
rescmn, i_linux
;
{*****************************************************************************
TIMPORTLIBLINUX
*****************************************************************************}
procedure timportliblinux.generatelib;
var
i : longint;
ImportLibrary : TImportLibrary;
begin
for i:=0 to current_module.ImportLibraryList.Count-1 do
begin
ImportLibrary:=TImportLibrary(current_module.ImportLibraryList[i]);
current_module.linkothersharedlibs.add(ImportLibrary.Name,link_always);
end;
end;
{*****************************************************************************
TEXPORTLIBLINUX
*****************************************************************************}
procedure texportliblinux.setfininame(list: TAsmList; const s: string);
begin
{ the problem with not having a .fini section is that a finalization
routine in regular code can get "smart" linked away -> reference it
just like the debug info }
new_section(list,sec_fpc,'links',0);
list.concat(Tai_const.Createname(s,0));
inherited setfininame(list,s);
end;
{*****************************************************************************
TLINKERLINUX
*****************************************************************************}
Constructor TLinkerLinux.Create;
begin
Inherited Create;
if not Dontlinkstdlibpath Then
{$ifdef x86_64}
LibrarySearchPath.AddPath(sysrootpath,'/lib64;/usr/lib64;/usr/X11R6/lib64',true);
{$else}
{$ifdef powerpc64}
LibrarySearchPath.AddPath(sysrootpath,'/lib64;/usr/lib64;/usr/X11R6/lib64',true);
{$else powerpc64}
LibrarySearchPath.AddPath(sysrootpath,'/lib;/usr/lib;/usr/X11R6/lib',true);
{$endif powerpc64}
{$endif x86_64}
end;
procedure TLinkerLinux.SetDefaultInfo;
{
This will also detect which libc version will be used
}
const
{$ifdef i386} platform_select='-b elf32-i386 -m elf_i386';{$endif}
{$ifdef x86_64} platform_select='-b elf64-x86-64 -m elf_x86_64';{$endif}
{$ifdef powerpc} platform_select='-b elf32-powerpc -m elf32ppclinux';{$endif}
{$ifdef POWERPC64} platform_select='-b elf64-powerpc -m elf64ppc';{$endif}
{$ifdef sparc} platform_select='-b elf32-sparc -m elf32_sparc';{$endif}
{$ifdef arm} platform_select='';{$endif} {unknown :( }
{$ifdef m68k} platform_select='';{$endif} {unknown :( }
{$ifdef mips}
{$ifdef mipsel} platform_select='-EL';{$else}
platform_select='-EB';{$endif}
{$endif}
var
defdynlinker: string;
begin
with Info do
begin
ExeCmd[1]:='ld '+platform_select+' $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE';
{ when we want to cross-link we need to override default library paths }
if length(sysrootpath) > 0 then
ExeCmd[1]:=ExeCmd[1]+' -T';
ExeCmd[1]:=ExeCmd[1]+' $RES';
DllCmd[1]:='ld '+platform_select+' $OPT $INIT $FINI $SONAME -shared -L. -o $EXE $RES';
DllCmd[2]:='strip --strip-unneeded $EXE';
ExtDbgCmd[1]:='objcopy --only-keep-debug $EXE $DBG';
ExtDbgCmd[2]:='objcopy --add-gnu-debuglink=$DBG $EXE';
ExtDbgCmd[3]:='strip --strip-unneeded $EXE';
{$ifdef m68k}
{ experimental, is this correct? }
defdynlinker:='/lib/ld-linux.so.2';
{$endif m68k}
{$ifdef i386}
defdynlinker:='/lib/ld-linux.so.2';
{$endif}
{$ifdef x86_64}
defdynlinker:='/lib64/ld-linux-x86-64.so.2';
{$endif x86_64}
{$ifdef sparc}
defdynlinker:='/lib/ld-linux.so.2';
{$endif sparc}
{$ifdef powerpc}
defdynlinker:='/lib/ld.so.1';
{$endif powerpc}
{$ifdef powerpc64}
defdynlinker:='/lib64/ld64.so.1';
{$endif powerpc64}
{$ifdef arm}
{$ifdef FPC_ARMEL}
defdynlinker:='/lib/ld-linux.so.3';
{$else FPC_ARMEL}
defdynlinker:='/lib/ld-linux.so.2';
{$endif FPC_ARMEL}
{$endif arm}
{
Search order:
glibc 2.1+
uclibc
glibc 2.0
If none is found (e.g. when cross compiling) glibc21 is assumed
}
if fileexists(sysrootpath+defdynlinker,false) then
begin
DynamicLinker:=defdynlinker;
{$ifdef i386}
libctype:=glibc21;
{$else i386}
libctype:=glibc2;
{$endif i386}
end
else if fileexists(sysrootpath+'/lib/ld-uClibc.so.0',false) then
begin
dynamiclinker:='/lib/ld-uClibc.so.0';
libctype:=uclibc;
end
{$ifdef i386}
else if FileExists(sysrootpath+'/lib/ld-linux.so.1',false) then
begin
DynamicLinker:='/lib/ld-linux.so.1';
libctype:=glibc2;
end
{$endif i386}
else
begin
{ when no dyn. linker is found, we are probably
cross compiling, so use the default dyn. linker }
DynamicLinker:=defdynlinker;
{
the default c startup script is gcrt0.as on all platforms
except i386
}
{$ifdef i386}
libctype:=glibc21;
{$else i386}
libctype:=glibc2;
{$endif i386}
end;
end;
end;
procedure TLinkerLinux.LoadPredefinedLibraryOrder;
// put your linkorder/linkalias overrides here.
// Note: assumes only called when reordering/aliasing is used.
Begin
if not (cs_link_no_default_lib_order in current_settings.globalswitches) Then
Begin
LinkLibraryOrder.add('gcc','',15);
LinkLibraryOrder.add('c','',100);
LinkLibraryOrder.add('gmon','',120);
LinkLibraryOrder.add('dl','',140);
LinkLibraryOrder.add('pthread','',160);
end;
End;
Procedure TLinkerLinux.InitSysInitUnitName;
var
csysinitunit,
gsysinitunit : string[20];
hp : tmodule;
begin
hp:=tmodule(loaded_units.first);
while assigned(hp) do
begin
linklibc := hp.linkothersharedlibs.find('c');
if linklibc then break;
hp:=tmodule(hp.next);
end;
reorder := linklibc and ReOrderEntries;
if current_module.islibrary then
begin
sysinitunit:='dll';
csysinitunit:='dll';
gsysinitunit:='dll';
prtobj:='dllprt0';
cprtobj:='dllprt0';
gprtobj:='dllprt0';
end
else
begin
prtobj:='prt0';
sysinitunit:='prc';
case libctype of
glibc21:
begin
cprtobj:='cprt21';
gprtobj:='gprt21';
csysinitunit:='c21';
gsysinitunit:='c21g';
end;
uclibc:
begin
cprtobj:='ucprt0';
gprtobj:='ugprt0';
csysinitunit:='uc';
gsysinitunit:='ucg';
end
else
cprtobj:='cprt0';
gprtobj:='gprt0';
csysinitunit:='c';
gsysinitunit:='g';
end;
end;
if cs_profile in current_settings.moduleswitches then
begin
prtobj:=gprtobj;
sysinitunit:=gsysinitunit;
linklibc:=true;
end
else
begin
if linklibc then
begin
prtobj:=cprtobj;
sysinitunit:=csysinitunit;
end;
end;
sysinitunit:='si_'+sysinitunit;
end;
Function TLinkerLinux.WriteResponseFile(isdll:boolean) : Boolean;
Var
linkres : TLinkRes;
i : longint;
HPath : TCmdStrListItem;
s,s1,s2 : TCmdStr;
found1,
found2 : boolean;
begin
result:=False;
{ set special options for some targets }
if cs_profile in current_settings.moduleswitches then
begin
if not(libctype in [glibc2,glibc21]) then
AddSharedLibrary('gmon');
AddSharedLibrary('c');
end;
{ Open link.res file }
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
with linkres do
begin
{ Write path to search libraries }
HPath:=TCmdStrListItem(current_module.locallibrarysearchpath.First);
while assigned(HPath) do
begin
Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TCmdStrListItem(HPath.Next);
end;
HPath:=TCmdStrListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
Add('SEARCH_DIR('+maybequoted(HPath.Str)+')');
HPath:=TCmdStrListItem(HPath.Next);
end;
{ force local symbol resolution (i.e., inside the shared }
{ library itself) for all non-exorted symbols, otherwise }
{ several RTL symbols of FPC-compiled shared libraries }
{ will be bound to those of a single shared library or }
{ to the main program }
if (isdll) then
begin
add('VERSION');
add('{');
add(' {');
if not texportlibunix(exportlib).exportedsymnames.empty then
begin
add(' global:');
repeat
add(' '+texportlibunix(exportlib).exportedsymnames.getfirst+';');
until texportlibunix(exportlib).exportedsymnames.empty;
end;
add(' local:');
add(' *;');
add(' };');
add('}');
end;
StartSection('INPUT(');
{ add objectfiles, start with prt0 always }
if not (target_info.system in systems_internal_sysinit) and (prtobj<>'') then
AddFileName(maybequoted(FindObjectFile(prtobj,'',false)));
{ try to add crti and crtbegin if linking to C }
if linklibc and (libctype<>uclibc) then
begin
{ crti.o must come first }
if librarysearchpath.FindFile('crti.o',false,s) then
AddFileName(s);
{ then the crtbegin* }
{ x86_64 requires this to use entry/exit code with pic,
see also issue #8210 regarding a discussion
no idea about the other non i386 CPUs (FK)
}
{$ifdef x86_64}
if current_module.islibrary then
begin
if librarysearchpath.FindFile('crtbeginS.o',false,s) then
AddFileName(s);
end
else
{$endif x86_64}
if (cs_link_staticflag in current_settings.globalswitches) and
librarysearchpath.FindFile('crtbeginT.o',false,s) then
AddFileName(s)
else if librarysearchpath.FindFile('crtbegin.o',false,s) then
AddFileName(s);
end;
{ main objectfiles }
while not ObjectFiles.Empty do
begin
s:=ObjectFiles.GetFirst;
if s<>'' then
AddFileName(maybequoted(s));
end;
EndSection(')');
{ Write staticlibraries }
if not StaticLibFiles.Empty then
begin
Add('GROUP(');
While not StaticLibFiles.Empty do
begin
S:=StaticLibFiles.GetFirst;
AddFileName(maybequoted(s))
end;
Add(')');
end;
// we must reorder here because the result could empty sharedlibfiles
if reorder Then
ExpandAndApplyOrder(SharedLibFiles);
// after this point addition of shared libs not allowed.
{ 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 (SharedLibFiles.Count<>1) or
(TCmdStrListItem(SharedLibFiles.First).Str<>'c') or
reorder then
begin
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);
Add('-l'+s);
end
else
begin
linklibc:=true;
end;
end;
Add(')');
end
else
linklibc:=true;
if (cs_link_staticflag in current_settings.globalswitches) or
(linklibc and not reorder) then
begin
Add('GROUP(');
{ when we have -static for the linker the we also need libgcc }
if (cs_link_staticflag in current_settings.globalswitches) then
begin
Add('-lgcc');
if librarysearchpath.FindFile('libgcc_eh.a',false,s1) then
Add('-lgcc_eh');
end;
{ be sure that libc is the last lib }
if linklibc and not reorder then
Add('-lc');
Add(')');
end;
end;
{ objects which must be at the end }
if linklibc and (libctype<>uclibc) then
begin
{ x86_64 requires this to use entry/exit code with pic,
see also issue #8210 regarding a discussion
no idea about the other non i386 CPUs (FK)
}
{$ifdef x86_64}
if current_module.islibrary then
found1:=librarysearchpath.FindFile('crtendS.o',false,s1)
else
{$endif x86_64}
found1:=librarysearchpath.FindFile('crtend.o',false,s1);
found2:=librarysearchpath.FindFile('crtn.o',false,s2);
if found1 or found2 then
begin
Add('INPUT(');
if found1 then
AddFileName(s1);
if found2 then
AddFileName(s2);
Add(')');
end;
end;
{Entry point.}
add('ENTRY(_start)');
{$ifdef x86_64}
{$define LINKERSCRIPT_INCLUDED}
add('SECTIONS');
add('{');
{Read-only sections, merged into text segment:}
if current_module.islibrary then
add(' . = 0 + SIZEOF_HEADERS;')
else
add(' PROVIDE (__executable_start = 0x0400000); . = 0x0400000 + SIZEOF_HEADERS;');
add(' . = 0 + SIZEOF_HEADERS;');
add(' .interp : { *(.interp) }');
add(' .hash : { *(.hash) }');
add(' .dynsym : { *(.dynsym) }');
add(' .dynstr : { *(.dynstr) }');
add(' .gnu.version : { *(.gnu.version) }');
add(' .gnu.version_d : { *(.gnu.version_d) }');
add(' .gnu.version_r : { *(.gnu.version_r) }');
add(' .rel.dyn :');
add(' {');
add(' *(.rel.init)');
add(' *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)');
add(' *(.rel.fini)');
add(' *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)');
add(' *(.rel.data.rel.ro*)');
add(' *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)');
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add(' *(.rel.got)');
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add(' KEEP (*(.init))');
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{.gnu.warning sections are handled specially by elf32.em.}
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add(' KEEP (*(.fini))');
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{Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up.}
add(' . = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1));');
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add(' KEEP (*(.fpc .fpc.n_version .fpc.n_links))');
add(' KEEP (*(.gnu.linkonce.d.*personality*))');
add(' }');
add(' PROVIDE (_edata = .);');
add(' PROVIDE (edata = .);');
{$ifdef zsegment_threadvars}
add(' _z = .;');
add(' .threadvar 0 : AT (_z) { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
add(' PROVIDE (_threadvar_size = SIZEOF(.threadvar));');
add(' . = _z + SIZEOF (.threadvar);');
{$else}
add(' .threadvar : { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
{$endif}
add(' __bss_start = .;');
add(' .bss :');
add(' {');
add(' *(.dynbss)');
add(' *(.bss .bss.* .gnu.linkonce.b.*)');
add(' *(COMMON)');
{Align here to ensure that the .bss section occupies space up to
_end. Align after .bss to ensure correct alignment even if the
.bss section disappears because there are no input sections.}
add(' . = ALIGN(32 / 8);');
add(' }');
add(' . = ALIGN(32 / 8);');
add(' PROVIDE (_end = .);');
add(' PROVIDE (end = .);');
{Stabs debugging sections.}
add(' .stab 0 : { *(.stab) }');
add(' .stabstr 0 : { *(.stabstr) }');
add(' /* DWARF debug sections.');
add(' Symbols in the DWARF debugging sections are relative to the beginning');
add(' of the section so we begin them at 0. */');
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add(' .debug_sfnames 0 : { *(.debug_sfnames) }');
add(' /* DWARF 1.1 and DWARF 2 */');
add(' .debug_aranges 0 : { *(.debug_aranges) }');
add(' .debug_pubnames 0 : { *(.debug_pubnames) }');
add(' /* DWARF 2 */');
add(' .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }');
add(' .debug_abbrev 0 : { *(.debug_abbrev) }');
add(' .debug_line 0 : { *(.debug_line) }');
add(' .debug_frame 0 : { *(.debug_frame) }');
add(' .debug_str 0 : { *(.debug_str) }');
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add(' /* SGI/MIPS DWARF 2 extensions */');
add(' .debug_weaknames 0 : { *(.debug_weaknames) }');
add(' .debug_funcnames 0 : { *(.debug_funcnames) }');
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add(' .debug_varnames 0 : { *(.debug_varnames) }');
add(' /DISCARD/ : { *(.note.GNU-stack) }');
add('}');
{$endif x86_64}
{$ifdef ARM}
if target_info.abi=abi_eabi then
begin
{ from GNU ld (CodeSourcery Sourcery G++ Lite 2007q3-53) 2.18.50.20070820 }
add('/* Script for -z combreloc: combine and sort reloc sections */');
add('OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm",');
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add('OUTPUT_ARCH(arm)');
add('ENTRY(_start)');
add('SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib");');
add('SECTIONS');
add('{');
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add(' .hash : { *(.hash) }');
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add(' *(.rela.fini)');
add(' *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)');
add(' *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)');
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add(' }');
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add(' .init :');
add(' {');
add(' KEEP (*(.init))');
add(' } =0');
add(' .plt : { *(.plt) }');
add(' .text :');
add(' {');
add(' *(.text .stub .text.* .gnu.linkonce.t.*)');
add(' KEEP (*(.text.*personality*))');
add(' /* .gnu.warning sections are handled specially by elf32.em. */');
add(' *(.gnu.warning)');
add(' *(.glue_7t) *(.glue_7) *(.vfp11_veneer)');
add(' } =0');
add(' .fini :');
add(' {');
add(' KEEP (*(.fini))');
add(' } =0');
add(' PROVIDE (__etext = .);');
add(' PROVIDE (_etext = .);');
add(' PROVIDE (etext = .);');
add(' .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }');
add(' .rodata1 : { *(.rodata1) }');
add(' .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) }');
add(' __exidx_start = .;');
add(' .ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) }');
add(' __exidx_end = .;');
add(' .eh_frame_hdr : { *(.eh_frame_hdr) }');
add(' .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }');
add(' .gcc_except_table : ONLY_IF_RO { *(.gcc_except_table .gcc_except_table.*) }');
add(' /* Adjust the address for the data segment. We want to adjust up to');
add(' the same address within the page on the next page up. */');
add(' . = ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1));');
add(' /* Exception handling */');
add(' .eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }');
add(' .gcc_except_table : ONLY_IF_RW { *(.gcc_except_table .gcc_except_table.*) }');
add(' /* Thread Local Storage sections */');
add(' .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }');
add(' .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }');
add(' .preinit_array :');
add(' {');
add(' PROVIDE_HIDDEN (__preinit_array_start = .);');
add(' KEEP (*(.preinit_array))');
add(' PROVIDE_HIDDEN (__preinit_array_end = .);');
add(' }');
add(' .init_array :');
add(' {');
add(' PROVIDE_HIDDEN (__init_array_start = .);');
add(' KEEP (*(SORT(.init_array.*)))');
add(' KEEP (*(.init_array))');
add(' PROVIDE_HIDDEN (__init_array_end = .);');
add(' }');
add(' .fini_array :');
add(' {');
add(' PROVIDE_HIDDEN (__fini_array_start = .);');
add(' KEEP (*(.fini_array))');
add(' KEEP (*(SORT(.fini_array.*)))');
add(' PROVIDE_HIDDEN (__fini_array_end = .);');
add(' }');
add(' .ctors :');
add(' {');
add(' /* gcc uses crtbegin.o to find the start of');
add(' the constructors, so we make sure it is');
add(' first. Because this is a wildcard, it');
add(' doesn''t matter if the user does not');
add(' actually link against crtbegin.o; the');
add(' linker won''t look for a file to match a');
add(' wildcard. The wildcard also means that it');
add(' doesn''t matter which directory crtbegin.o');
add(' is in. */');
add(' KEEP (*crtbegin.o(.ctors))');
add(' KEEP (*crtbegin?.o(.ctors))');
add(' /* We don''t want to include the .ctor section from');
add(' the crtend.o file until after the sorted ctors.');
add(' The .ctor section from the crtend file contains the');
add(' end of ctors marker and it must be last */');
add(' KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))');
add(' KEEP (*(SORT(.ctors.*)))');
add(' KEEP (*(.ctors))');
add(' }');
add(' .dtors :');
add(' {');
add(' KEEP (*crtbegin.o(.dtors))');
add(' KEEP (*crtbegin?.o(.dtors))');
add(' KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))');
add(' KEEP (*(SORT(.dtors.*)))');
add(' KEEP (*(.dtors))');
add(' }');
add(' .jcr : { KEEP (*(.jcr)) }');
add(' .data.rel.ro : { *(.data.rel.ro.local* .gnu.linkonce.d.rel.ro.local.*) *(.data.rel.ro* .gnu.linkonce.d.rel.ro.*) }');
add(' .dynamic : { *(.dynamic) }');
add(' .got : { *(.got.plt) *(.got) }');
add(' .data :');
add(' {');
add(' __data_start = . ;');
add(' *(.data .data.* .gnu.linkonce.d.*)');
{ extra by FPC }
add(' KEEP (*(.fpc .fpc.n_version .fpc.n_links))');
add(' KEEP (*(.gnu.linkonce.d.*personality*))');
add(' SORT(CONSTRUCTORS)');
add(' }');
add(' .data1 : { *(.data1) }');
add(' _edata = .; PROVIDE (edata = .);');
add(' __bss_start = .;');
add(' __bss_start__ = .;');
add(' .bss :');
add(' {');
add(' *(.dynbss)');
add(' *(.bss .bss.* .gnu.linkonce.b.*)');
add(' *(COMMON)');
add(' /* Align here to ensure that the .bss section occupies space up to');
add(' _end. Align after .bss to ensure correct alignment even if the');
add(' .bss section disappears because there are no input sections.');
add(' FIXME: Why do we need it? When there is no .bss section, we don''t');
add(' pad the .data section. */');
add(' . = ALIGN(. != 0 ? 32 / 8 : 1);');
add(' }');
add(' _bss_end__ = . ; __bss_end__ = . ;');
add(' . = ALIGN(32 / 8);');
add(' . = ALIGN(32 / 8);');
add(' __end__ = . ;');
add(' _end = .; PROVIDE (end = .);');
add(' /* Stabs debugging sections. */');
add(' .stab 0 : { *(.stab) }');
add(' .stabstr 0 : { *(.stabstr) }');
add(' .stab.excl 0 : { *(.stab.excl) }');
add(' .stab.exclstr 0 : { *(.stab.exclstr) }');
add(' .stab.index 0 : { *(.stab.index) }');
add(' .stab.indexstr 0 : { *(.stab.indexstr) }');
add(' .comment 0 : { *(.comment) }');
add(' /* DWARF debug sections.');
add(' Symbols in the DWARF debugging sections are relative to the beginning');
add(' of the section so we begin them at 0. */');
add(' /* DWARF 1 */');
add(' .debug 0 : { *(.debug) }');
add(' .line 0 : { *(.line) }');
add(' /* GNU DWARF 1 extensions */');
add(' .debug_srcinfo 0 : { *(.debug_srcinfo) }');
add(' .debug_sfnames 0 : { *(.debug_sfnames) }');
add(' /* DWARF 1.1 and DWARF 2 */');
add(' .debug_aranges 0 : { *(.debug_aranges) }');
add(' .debug_pubnames 0 : { *(.debug_pubnames) }');
add(' /* DWARF 2 */');
add(' .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }');
add(' .debug_abbrev 0 : { *(.debug_abbrev) }');
add(' .debug_line 0 : { *(.debug_line) }');
add(' .debug_frame 0 : { *(.debug_frame) }');
add(' .debug_str 0 : { *(.debug_str) }');
add(' .debug_loc 0 : { *(.debug_loc) }');
add(' .debug_macinfo 0 : { *(.debug_macinfo) }');
add(' /* SGI/MIPS DWARF 2 extensions */');
add(' .debug_weaknames 0 : { *(.debug_weaknames) }');
add(' .debug_funcnames 0 : { *(.debug_funcnames) }');
add(' .debug_typenames 0 : { *(.debug_typenames) }');
add(' .debug_varnames 0 : { *(.debug_varnames) }');
add(' /* DWARF 3 */');
add(' .debug_pubtypes 0 : { *(.debug_pubtypes) }');
add(' .debug_ranges 0 : { *(.debug_ranges) }');
add(' .stack 0x80000 :');
add(' {');
add(' _stack = .;');
add(' *(.stack)');
add(' }');
add(' .ARM.attributes 0 : { KEEP (*(.ARM.attributes)) KEEP (*(.gnu.attributes)) }');
add(' .note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }');
add(' /DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) }');
add('}');
end
else
{$endif ARM}
{$ifndef LINKERSCRIPT_INCLUDED}
begin
{Sections.}
add('SECTIONS');
add('{');
{Read-only sections, merged into text segment:}
add(' PROVIDE (__executable_start = 0x010000); . = 0x010000 + SIZEOF_HEADERS;');
add(' .interp : { *(.interp) }');
add(' .hash : { *(.hash) }');
add(' .dynsym : { *(.dynsym) }');
add(' .dynstr : { *(.dynstr) }');
add(' .gnu.version : { *(.gnu.version) }');
add(' .gnu.version_d : { *(.gnu.version_d) }');
add(' .gnu.version_r : { *(.gnu.version_r) }');
add(' .rel.dyn :');
add(' {');
add(' *(.rel.init)');
add(' *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*)');
add(' *(.rel.fini)');
add(' *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*)');
add(' *(.rel.data.rel.ro*)');
add(' *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*)');
add(' *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*)');
add(' *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*)');
add(' *(.rel.got)');
add(' *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*)');
add(' }');
add(' .rela.dyn :');
add(' {');
add(' *(.rela.init)');
add(' *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*)');
add(' *(.rela.fini)');
add(' *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*)');
add(' *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*)');
add(' *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*)');
add(' *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*)');
add(' *(.rela.got)');
add(' *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*)');
add(' }');
add(' .rel.plt : { *(.rel.plt) }');
add(' .rela.plt : { *(.rela.plt) }');
add(' .init :');
add(' {');
add(' KEEP (*(.init))');
add(' } =0x90909090');
add(' .plt : { *(.plt) }');
add(' .text :');
add(' {');
add(' *(.text .stub .text.* .gnu.linkonce.t.*)');
add(' KEEP (*(.text.*personality*))');
{.gnu.warning sections are handled specially by elf32.em.}
add(' *(.gnu.warning)');
add(' } =0x90909090');
add(' .fini :');
add(' {');
add(' KEEP (*(.fini))');
add(' } =0x90909090');
add(' PROVIDE (_etext = .);');
add(' .rodata :');
add(' {');
add(' *(.rodata .rodata.* .gnu.linkonce.r.*)');
add(' }');
{Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up.}
add(' . = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1));');
add(' .dynamic : { *(.dynamic) }');
add(' .got : { *(.got) }');
add(' .got.plt : { *(.got.plt) }');
add(' .data :');
add(' {');
add(' *(.data .data.* .gnu.linkonce.d.*)');
add(' KEEP (*(.fpc .fpc.n_version .fpc.n_links))');
add(' KEEP (*(.gnu.linkonce.d.*personality*))');
add(' }');
add(' PROVIDE (_edata = .);');
add(' PROVIDE (edata = .);');
{$ifdef zsegment_threadvars}
add(' _z = .;');
add(' .threadvar 0 : AT (_z) { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
add(' PROVIDE (_threadvar_size = SIZEOF(.threadvar));');
add(' . = _z + SIZEOF (.threadvar);');
{$else}
add(' .threadvar : { *(.threadvar .threadvar.* .gnu.linkonce.tv.*) }');
{$endif}
add(' __bss_start = .;');
add(' .bss :');
add(' {');
add(' *(.dynbss)');
add(' *(.bss .bss.* .gnu.linkonce.b.*)');
add(' *(COMMON)');
{Align here to ensure that the .bss section occupies space up to
_end. Align after .bss to ensure correct alignment even if the
.bss section disappears because there are no input sections.}
add(' . = ALIGN(32 / 8);');
add(' }');
add(' . = ALIGN(32 / 8);');
add(' PROVIDE (_end = .);');
add(' PROVIDE (end = .);');
{Stabs debugging sections.}
add(' .stab 0 : { *(.stab) }');
add(' .stabstr 0 : { *(.stabstr) }');
add('}');
end;
{$endif LINKERSCRIPT_INCLUDED}
{ Write and Close response }
writetodisk;
Free;
end;
WriteResponseFile:=True;
end;
function TLinkerLinux.MakeExecutable:boolean;
var
i : longint;
binstr,
cmdstr : TCmdStr;
success : boolean;
DynLinkStr : string;
GCSectionsStr,
StaticStr,
StripStr : string[40];
begin
if not(cs_link_nolink in current_settings.globalswitches) then
Message1(exec_i_linking,current_module.exefilename^);
{ Create some replacements }
StaticStr:='';
StripStr:='';
GCSectionsStr:='';
DynLinkStr:='';
if (cs_link_staticflag in current_settings.globalswitches) then
StaticStr:='-static';
if (cs_link_strip in current_settings.globalswitches) and
not(cs_link_separate_dbg_file in current_settings.globalswitches) then
StripStr:='-s';
if (cs_link_map in current_settings.globalswitches) then
StripStr:='-Map '+maybequoted(ChangeFileExt(current_module.exefilename^,'.map'));
if create_smartlink_sections then
GCSectionsStr:='--gc-sections';
If (cs_profile in current_settings.moduleswitches) or
((Info.DynamicLinker<>'') and (not SharedLibFiles.Empty)) then
begin
DynLinkStr:='--dynamic-linker='+Info.DynamicLinker;
if cshared then
DynLinkStr:=DynLinkStr+' --shared ';
if rlinkpath<>'' then
DynLinkStr:=DynLinkStr+' --rpath-link '+rlinkpath;
End;
{ Write used files and libraries }
WriteResponseFile(false);
{ Call linker }
SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
Replace(cmdstr,'$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);
{ create dynamic symbol table? }
if HasExports then
cmdstr:=cmdstr+' -E';
success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
{ Create external .dbg file with debuginfo }
if success and (cs_link_separate_dbg_file in current_settings.globalswitches) then
begin
for i:=1 to 3 do
begin
SplitBinCmd(Info.ExtDbgCmd[i],binstr,cmdstr);
Replace(cmdstr,'$EXE',maybequoted(current_module.exefilename^));
Replace(cmdstr,'$DBGFN',maybequoted(extractfilename(current_module.dbgfilename^)));
Replace(cmdstr,'$DBG',maybequoted(current_module.dbgfilename^));
success:=DoExec(FindUtil(utilsprefix+BinStr),CmdStr,true,false);
if not success then
break;
end;
end;
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in current_settings.globalswitches) then
DeleteFile(outputexedir+Info.ResName);
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
Function TLinkerLinux.MakeSharedLibrary:boolean;
var
InitStr,
FiniStr,
SoNameStr : string[80];
binstr,
cmdstr : TCmdStr;
success : boolean;
begin
MakeSharedLibrary:=false;
if not(cs_link_nolink in current_settings.globalswitches) then
Message1(exec_i_linking,current_module.sharedlibfilename^);
{ Write used files and libraries }
WriteResponseFile(true);
{ Create some replacements }
{ note: linux does not use exportlib.initname/fininame due to the custom startup code }
InitStr:='-init FPC_SHARED_LIB_START';
FiniStr:='-fini FPC_LIB_EXIT';
SoNameStr:='-soname '+ExtractFileName(current_module.sharedlibfilename^);
{ Call linker }
SplitBinCmd(Info.DllCmd[1],binstr,cmdstr);
Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
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,false);
{ Strip the library ? }
if success and (cs_link_strip in current_settings.globalswitches) then
begin
{ only remove non global symbols and debugging info for a library }
Info.DllCmd[2]:='strip --discard-all --strip-debug $EXE';
SplitBinCmd(Info.DllCmd[2],binstr,cmdstr);
Replace(cmdstr,'$EXE',maybequoted(current_module.sharedlibfilename^));
success:=DoExec(FindUtil(utilsprefix+binstr),cmdstr,true,false);
end;
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in current_settings.globalswitches) then
DeleteFile(outputexedir+Info.ResName);
MakeSharedLibrary:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
{$ifdef i386}
RegisterExternalLinker(system_i386_linux_info,TLinkerLinux);
RegisterImport(system_i386_linux,timportliblinux);
RegisterExport(system_i386_linux,texportliblinux);
RegisterTarget(system_i386_linux_info);
RegisterExternalLinker(system_x86_6432_linux_info,TLinkerLinux);
RegisterImport(system_x86_6432_linux,timportliblinux);
RegisterExport(system_x86_6432_linux,texportliblinux);
RegisterTarget(system_x86_6432_linux_info);
{$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}
{$ifdef powerpc64}
RegisterExternalLinker(system_powerpc64_linux_info,TLinkerLinux);
RegisterImport(system_powerpc64_linux,timportliblinux);
RegisterExport(system_powerpc64_linux,texportliblinux);
RegisterTarget(system_powerpc64_linux_info);
{$endif powerpc64}
{$ifdef alpha}
RegisterExternalLinker(system_alpha_linux_info,TLinkerLinux);
RegisterImport(system_alpha_linux,timportliblinux);
RegisterExport(system_alpha_linux,texportliblinux);
RegisterTarget(system_alpha_linux_info);
{$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}
{$ifdef MIPS}
{$ifdef MIPSEL}
RegisterExternalLinker(system_mipsel_linux_info,TLinkerLinux);
RegisterImport(system_mipsel_linux,timportliblinux);
RegisterExport(system_mipsel_linux,texportliblinux);
RegisterTarget(system_mipsel_linux_info);
{$else MIPS}
RegisterExternalLinker(system_mips_linux_info,TLinkerLinux);
RegisterImport(system_mips_linux,timportliblinux);
RegisterExport(system_mips_linux,texportliblinux);
RegisterTarget(system_mips_linux_info);
{$endif MIPSEL}
{$endif MIPS}
RegisterRes(res_elf_info,TWinLikeResourceFile);
end.
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