Commit regenerated lto-plugin/Makefile.in in order to reflect changes
introduction of --enable-host-pie.
lto-plugin/ChangeLog:
2023-06-30 Martin Jambor <mjambor@suse.cz>
* Makefile.in: Regenerate.
As promised in the --enable-host-pie patch, this patch adds another
configure option, --enable-host-bind-now, which adds -z now when linking
the compiler executables in order to extend hardening. BIND_NOW with RELRO
allows the GOT to be marked RO; this prevents GOT modification attacks.
This option does not affect linking of target libraries; you can use
LDFLAGS_FOR_TARGET=-Wl,-z,relro,-z,now to enable RELRO/BIND_NOW.
With this patch:
$ readelf -Wd cc1{,plus,obj,gm2} f951 lto1 cpp rust1 gnat1 | grep FLAGS
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
0x000000000000001e (FLAGS) BIND_NOW
0x000000006ffffffb (FLAGS_1) Flags: NOW PIE
c++tools/ChangeLog:
* configure.ac (--enable-host-bind-now): New check.
* configure: Regenerate.
gcc/ChangeLog:
* configure.ac (--enable-host-bind-now): New check. Add
-Wl,-z,now to LD_PICFLAG if --enable-host-bind-now.
* configure: Regenerate.
* doc/install.texi: Document --enable-host-bind-now.
lto-plugin/ChangeLog:
* configure.ac (--enable-host-bind-now): New check. Link with
-z,now.
* configure: Regenerate.
This is one part of the fix for PR109128, along with a corresponding
binutils's linker change. Without this patch, what happens in the
linker, when an unused object in a .a file has offload data, is that
elf_link_is_defined_archive_symbol calls bfd_link_plugin_object_p,
which ends up calling the plugin's claim_file_handler, which then
records the object as one with offload data. That is, the linker never
decides to use the object in the first place, but use of this _p
interface (called as part of trying to decide whether to use the
object) results in the plugin deciding to use its offload data (and a
consequent mismatch in the offload data present at runtime).
The new hook allows the linker plugin to distinguish calls to
claim_file_handler that know the object is being used by the linker
(from ldmain.c:add_archive_element), from calls that don't know it's
being used by the linker (from elf_link_is_defined_archive_symbol); in
the latter case, the plugin should avoid recording the object as one
with offload data.
PR middle-end/109128
include/
* plugin-api.h (ld_plugin_claim_file_handler_v2)
(ld_plugin_register_claim_file_v2)
(LDPT_REGISTER_CLAIM_FILE_HOOK_V2): New.
(struct ld_plugin_tv): Add tv_register_claim_file_v2.
lto-plugin/
* lto-plugin.c (register_claim_file_v2): New.
(claim_file_handler_v2): New.
(claim_file_handler): Wrap claim_file_handler_v2.
(onload): Handle LDPT_REGISTER_CLAIM_FILE_HOOK_V2.
As promised in the --enable-host-pie patch, this patch adds another
configure option, --enable-host-bind-now, which adds -z now when linking
the compiler executables in order to extend hardening. BIND_NOW with RELRO
allows the GOT to be marked RO; this prevents GOT modification attacks.
This option does not affect linking of target libraries; you can use
LDFLAGS_FOR_TARGET=-Wl,-z,relro,-z,now to enable RELRO/BIND_NOW.
c++tools/ChangeLog:
* configure.ac (--enable-host-bind-now): New check.
* configure: Regenerate.
gcc/ChangeLog:
* configure.ac (--enable-host-bind-now): New check. Add
-Wl,-z,now to LD_PICFLAG if --enable-host-bind-now.
* configure: Regenerate.
* doc/install.texi: Document --enable-host-bind-now.
lto-plugin/ChangeLog:
* configure.ac (--enable-host-bind-now): New check. Link with
-z,now.
* configure: Regenerate.
This change adds the configury bits to activate the build of
shared libs on VxWorks ports configured with --enable-shared,
for libraries variants where this is generally supported (rtp,
code model !large - currently not compatible with -fPIC).
Set lt_cv_deplibs_check_method in libtool.m4, so the build of
libraries know how to establish dependencies. This is useful in
configurations such as aarch64 where proper support of LSE relies
on accurate dependency information between libstdc++ and libgcc_s
to begin with.
Regenerate configure scripts to reflect libtool.m4 change.
2022-10-09 Olivier Hainque <hainque@adacore.com>
* libtool.m4 (*vxworks*): When enable_shared, set dynamic_linker
and friends for rtp !large. Assume the linker has the required
abilities and set lt_cv_deplibs_check_method.
gcc/
* config.gcc (*vxworks*): Add t-slibgcc fragment
if enable_shared.
libgcc/
* config.host (*vxworks*): When enable_shared, add
libgcc and crtstuff "shared" fragments for rtp except
large code model.
(aarch64*-wrs-vxworks7*): Remove t-slibgcc-libgcc from
the list of fragments.
2022-10-09 Olivier Hainque <hainque@adacore.com>
gcc/
* configure: Regenerate.
libatomic/
* configure: Regenerate.
libbacktrace/
* configure: Regenerate.
libcc1/
* configure: Regenerate.
libffi/
* configure: Regenerate.
libgfortran/
* configure: Regenerate.
libgomp/
* configure: Regenerate.
libitm/
* configure: Regenerate.
libobjc/
* configure: Regenerate.
liboffloadmic/
* configure: Regenerate.
liboffloadmic/
* plugin/configure: Regenerate.
libphobos/
* configure: Regenerate.
libquadmath/
* configure: Regenerate.
libsanitizer/
* configure: Regenerate.
libssp/
* configure: Regenerate.
libstdc++-v3/
* configure: Regenerate.
libvtv/
* configure: Regenerate.
lto-plugin/
* configure: Regenerate.
zlib/
* configure: Regenerate.
Use -pthread only if we are going to use pthread functionality.
PR bootstrap/106156
lto-plugin/ChangeLog:
* Makefile.am: Use ac_lto_plugin_extra_ldflags for AM_LDFLAGS.
* configure.ac: Use AC_SUBST(ac_lto_plugin_extra_ldflags).
* Makefile.in: Regenerate.
* configure: Regenerate.
For now, support locking only for linux targets that are different from
riscv* where the target depends on libatomic (and fails during
bootstrap).
PR lto/106170
lto-plugin/ChangeLog:
* configure.ac: Configure HAVE_PTHREAD_LOCKING.
* lto-plugin.c (LOCK_SECTION): New.
(UNLOCK_SECTION): New.
(claim_file_handler): Use the newly added macros.
(onload): Likewise.
* config.h.in: Regenerate.
* configure: Regenerate.
Move -pthread from configure.ac to Makefile.in so that it is passed to AM_LDFLAGS.
PR lto/106118
lto-plugin/ChangeLog:
* configure.ac: Move -pthread from here...
* Makefile.am: ...to here.
* configure: Regenerate.
* Makefile.in: Likewise.
That supports skipping of an object file (LDPS_NO_SYMS).
lto-plugin/ChangeLog:
* lto-plugin.c (struct plugin_file_info): Add skip_file flag.
(write_resolution): Write resolution only if get_symbols != LDPS_NO_SYMS.
(all_symbols_read_handler): Ignore file if skip_file is true.
(onload): Handle LDPT_GET_SYMBOLS_V3.
As reported, libtool -export-symbols-regex doesn't work on Solaris
when using GNU ld instead of Sun ld, libtool just always assumes Sun ld.
As I'm unsure what is the maintainance status of libtool right now,
this patch solves it on the lto-plugin side instead, tests at configure time
similar way how libssp and other target libraries test for symbol versioning
(except omitting the symbol version because we just want one GLOBAL symbol
and rest of them LOCAL), and will use the current way of
-export-symbols-regex onload as fallback when this doesn't work.
2022-03-22 Jakub Jelinek <jakub@redhat.com>
PR lto/102426
lto-plugin/
* configure.ac (LTO_PLUGIN_USE_SYMVER, LTO_PLUGIN_USE_SYMVER_GNU,
LTO_PLUGIN_USE_SYMVER_SUN): New test for symbol versioning support.
* Makefile.am (version_arg, version_dep): Set conditionally based
on LTO_PLUGIN_USE_SYMVER*.
(liblto_plugin_la_LDFLAGS): Use $(version_arg) instead of
-export-symbols-regex onload.
(liblto_plugin_la_DEPENDENCIES): Depend on $(version_dep).
* lto-plugin.map: New file.
* configure: Regenerated.
* Makefile.in: Regenerated.
lto-plugin/ChangeLog:
* lto-plugin.c (all_symbols_read_handler): With -save-temps, use
link_output_name for -foffload-objects's file name, if available.
lto-plugin/ChangeLog:
* lto-plugin.c (process_offload_section): Use a linker as many
comments are connected to gold linker.
(process_option): Likewise.
The transposition nolto -> notlo is confusing and it makes the long
name even harder to read than it already is - I kept reading it as
"not lo" until I realized it was a simple typo.
Fixes: 5269b24605 (Silence warning in LTO mode on VxWorks)
lto-plugin/
* lto-plugin.c: Fix -linker-output-auto-notlo-rel ->
-linker-output-auto-nolto-rel typo.
(process_option): Adjust accordingly, accepting both old and
new spelling.
gcc/
* config/vxworks.h (LTO_PLUGIN_SPEC): Adapt to corrected
spelling of -linker-output-auto-nolto-rel.
So right now liblto_plugin.so exports many libiberty symbols and
simple_object file symbols but really it just needs to export onload.
This fixes the problem by using "-export-symbols-regex onload" on
the libtool link line.
lto-plugin/ChangeLog:
PR lto/49664
* Makefile.am: Export only onload.
* Makefile.in: Regenerate.
This adds a -ltrans-objects option to lto-plugin that by-passes
lto-wrapper invocation and instead feeds LD the final LTRANS objects
directly from the response file given as argument to the option.
This allows LD issues involving the linker-plugin path to be
debugged in an easier way with just the IR objects (their symtab)
and the LTRANS objects as testcase.
I've tested the path re-building stage2 build/genmatch from an
LTO bootstrap and got a bit-identical executable by adding
-plugin-opt=-ltrans-objects=y to the original collect2 invocation,
seeding y with the final objects as printed by building genmatch
with -save-temps -v.
2021-06-22 Richard Biener <rguenther@suse.de>
lto-plugin/
* lto-plugin.c (ltrans_objects): New global.
(all_symbols_read_handler): If -ltrans-objects was specified,
add the output files from the specified file directly.
(process_option): Handle -ltrans-objects.
This fixes:
lto-plugin.c:642:7: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
lto-plugin/ChangeLog:
* lto-plugin.c (exec_lto_wrapper): Make a temp variable.
GCC Administrator