how the fpc sections have to be linked *on Linux*. This prevents the
"did you forget -T" warnings from ld, and in general is more correct than
our previous approach of specifying a complete linker script without -T
and hoping that there won't be any unexpected interactions with ld's
built-in linker script (fixed version of r31664, thanks to Alan Modra)
o use the new -X9 command line option to generate linker scripts that
are compatible with binutils older than 2.19 (reverts to the old
behaviour)
git-svn-id: trunk@31675 -
how the fpc sections have to be linked *on Linux*. This prevents the
"did you forget -T" warnings from ld, and in general is more correct than
our previous approach of specifying a complete linker script without -T
and hoping that there won't be any unexpected interactions with ld's
built-in linker script
o use the new -X9 command line option to generate linker scripts that
are compatible with binutils older than 2.19 (reverts to the old
behaviour)
git-svn-id: trunk@31664 -
chance of conflicts with the built-in linkerscript is minimised
o removed special case for AArch64 which that already
o check the diff without whitespace changes, most is indentation
git-svn-id: trunk@31459 -
different 'ar' implementations under different platforms
* use the omflib reader instead of the ar reader in the msdos internal linker
git-svn-id: trunk@31322 -
* specify the correct linker emulation to use for ppc64 ELFv2 little endian
* specify the correct default library directories to search for ELFv2 little
endian
git-svn-id: trunk@30194 -
way by the compiler (and furthermore it would have to be registerd in an
the x86_64 compiler binary, not an i386 one) (mantis #25525)
git-svn-id: trunk@26460 -
* Changed direct references to linker classes in TSystemInfo records to enumerated ids.
* RegisterExtennalLinker and RegisterInternalLinker procedures replaced by single RegisterLinker procedure and moved to link.pas.
- TAbstractLinker is no longer necessary, removed.
This change allows to register linker once per id, rather than once per target, and also allows TSystemInfo records to be read-only.
git-svn-id: trunk@25279 -
* For common symbols, report objdata of the original ObjSymbol, not of the resolving one, so the map file shows where it comes from.
+ TElfExeOutput.OrderOrphanSections method, handles object sections not mentioned in script similar to ld.
- t_linux.pas: removed sections that are not part of ld scripts, they are now handled by OrderOrphanSections.
git-svn-id: trunk@25184 -
* For unresolved weak symbols, provide dynamic binding only if they are referenced via GOT or PLT (ld-compatible behavior).
* Made more TElfExeOutput properties/methods usable by descendant classes.
* x86_64/cpuelf.pas: some refactoring, handle DTPOFF relocations, prohibit TPOFF relocations in shared objects.
* i386/cpuelf.pas: set symref_from_text flags for copy relocations to work correctly.
git-svn-id: trunk@23375 -
* Made name of dynamic interpreter variable, it is now set correctly for each target.
- Removed setting header flags for ARM. This functionality belongs to CPU-specific unit anyway, and probably must be implemented using object attributes in modern ABIs.
git-svn-id: trunk@23032 -
x86_64 is the most elaborated, has some degree of indirect function (GNU_IFUNC) and TLS support, so it is even able to link with static libc/pthreads code (tw14265) and produce an executable that can launch (but still fails due to invalid DWARF unwind info).
i386 produces working shared libraries if they are compiled with -Cg, without one your mileage may vary. tw14265 does not link yet due to missing COMDAT group support.
git-svn-id: trunk@22775 -
Make macro MIPS/CPUMIPS/MIPS32 common for big endian and little endian mips processors
use MIPSEL* for little endian systems
use MIPSEB* for big endian systems
git-svn-id: trunk@21599 -
rather than with single/double quotes depending on the target platform
(ld only supports double quotes), and rather than only quoting when
necessary (wastes time since quotes are always allowed, and double
quotes inside a directory name cannot be escaped for ld; they are
simply not supported by the program) (mantis #22059, follow-up to
r21069 and r21208)
git-svn-id: trunk@21343 -
that deal with paths/filenames with TPathStr (= ansistring) to prevent
cutting off long paths (no change in speed when compiling the compiler,
1% extra memory usage)
git-svn-id: trunk@21120 -
o new eabihf (hard float) abi
o vfpv3_d16 variant of VFP (default variant used by EABI assemblers: VFPv3
with only 16 double registers instead of 32) and pass it to GNU as
o make the odd numbered single precision floating point VFP registers
available for explicit allocation for use by the calling convention
* fixed copy/paste error in stdname of S30 register
-> use -dFPC_ARMHF to create an ARM eabi hard float compiler
(mantis #21554)
git-svn-id: trunk@20660 -
Every startup code must now provide an additional entry point called "_dynamic_start" that is set as new the entry point if the program links to a Pascal shared library. Its purpose is to set up an exit hook usually passed via a register, which should be called during program finalization if non-nil.
We use this additional entry point because this register only has meaningful content when there are any compile-time linked shared libraries, otherwise it often contains random garbage. The difference between the _dynamic_start and the original code is minimal; actually in all implementations the _dynamic_start code passes on control to the old startup code, so we use an additional entry point instead of an additional startup file.
Detailed changes and fixes list:
compiler:
always link to the dynamic loader (ld.so) when compiling shared libraries. Fixes crashes in the loader during shared library finalization on some Linuxes
remove additional ENTRY() section in arm linker script
select either _dynamic_start or _start as entry point depending on whether this is a static or dynamic executable
powerpc*:
do not set System.isLibrary in startup code, it will be set during library initialization anyway
trap in case of reaching code locations that should not be reached instead of looping (possibly endlessly)
powerpc:
register atexit() function pointer if supplied to the executable and call it during shutdown
correctly set argc/argv/envp in shared library code and return correctly to the caller after initialization
pass on exitcode in shared library haltproc
use the more recent exit_group system call if available for shutdown
powerpc64
fix .ptrgl stub, do not set the environment register to the value of the GOT entry in the function descriptor
arm
do not set System.isLibrary in startup code, it will be set during library initialization anyway
reload exitcode to pass to shutdown
mips,mipsel,sparc
added stubs to allow correct linking
git-svn-id: trunk@19036 -
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 -
- sort of reverted r14134, which is no longer required after the above
change (new_section() inserts the alignment itself)
* made the tai_section.create() constructor private so it cannot be
called directly anymore
git-svn-id: trunk@15482 -
